EXERCISE DEVICE

Description

FIELD OF THE INVENTION

The present application relates to the technical field of exercise equipment, and specifically to an exercise device.

BACKGROUND OF THE INVENTION

Dumbbells are a type of free-weight equipment widely used in fitness and strength training. It is mainly composed of a handle in the middle and weight blocks at both ends, wherein, the weight of the weight blocks at both ends can be adjusted, and the settings of different exercise intensities can be achieved by adjusting the weight of the weight blocks.

When using dumbbells for exercise, the user's muscles actively contract against the resistance generated by the weight of the dumbbells to complete the predetermined action. During the confrontation process, the user's muscles can be stimulated to suffer minor damage, and the muscles become stronger during the recovery process, thereby achieving the purpose of exercise. At the same time, exercising with dumbbells can also improve muscle endurance and explosive power.

When completing the predetermined action, the user controls the rotation of the dumbbell through hand and wrist movements; for example, the user can change the position or angle of the dumbbell through the rotation of the hand and wrist. During the process of controlling the rotation of the dumbbell through hand and wrist movements, if the user makes a mistake in controlling the dumbbell, it may cause accidental injuries to the user, such as muscle strains or tears, joint sprains or injuries and wrist injuries, etc.

A number of devices have been published which provides user friendly dumbbell:

“User friendly hand held weight”, U.S. Pat. No. 5,135,455, which disclose a user friendly dumbbell that is comfortable, safe and durable, and which also protects against damage to surfaces against which the dumbbell may come into contact is disclosed.

“Fixed-head dumbbell”, Craig D. Landfair, U.S. Pat. No. 6,099,443, which discloses a pin passing through a bore in the weighted heads and each end of the bar holds the weighted heads securely in place. The weighted heads have a circumference of circular shape, and are coated with a resilient material. The exterior surface of the resilient material has a multi-sided circumference. The circular shape of the circumference of the weighted heads prevents the weighted heads from digging into the resilient coating when the dumbbell is in use or is dropped.

There are other numerous prior arts, each to overcome a specific safety problem. Based on prior art then, no hand held device is available that offers safety and help uses improve their performance.

BRIEF SUMMARY

The present application provides an exercise device that reduces the problem that users tend to make mistakes when using dumbbells.

The embodiments of the present application provide an exercise device, and the device includes: a handheld component, a first head component and a second head component;

The first head component is connected to the first end of the handheld component; the second head component is connected to the second end of the handheld component; The handheld component includes: a palm support structure;

The palm support structure is located on the first side of the handheld component in the longitudinal direction, so that the palm support structure is in contact with the user's palm when the user holds the exercise device, and the longitudinal direction of the handheld component is parallel to the axis passing through the first end and the second end.

Optionally, the handheld component further includes: a second groove structure, a third groove structure, a fourth groove structure, and a fifth groove structure;

The second groove structure, the third groove structure, the fourth groove structure, and the fifth groove structure are sequentially located on the second side of the handheld component in the longitudinal direction, and the second side is the opposite side of the first side, so that when the user holds the exercise device, the second groove structure is in contact with the user's index finger, and the third groove structure is in contact with the user's middle finger, the fourth groove structure is in contact with the user's ring finger; the fifth groove structure is in contact with the user's little finger.

Optionally, the handheld component further includes: a first groove structure;

The first groove structure is located on the third or fourth side of the handheld component in the longitudinal direction, so that the first groove structure is in contact with the user's thumb when the user holds the exercise device; the third side and the fourth side are the connecting surfaces between the first side and the second side, and the third side and the fourth side are opposite sides to each other.

Optionally, the handheld component further includes: a first protruding structure, a second protruding structure, and a third protruding structure;

The first protruding structure connects the second groove structure and the third groove structure; the second protruding structure connects the third groove structure and the fourth groove structure; the third protruding structure connects the fourth groove structure and the fifth groove structure.

Optionally, the cross-section of the handheld component perpendicular to the longitudinal direction is an irregular ellipse, and the area of the cross-section is smaller than the cross-sectional area of the first head component and the second head component.

Optionally, at least some of the multiple cross-sections of the handheld component perpendicular to the longitudinal direction have different shapes and areas.

Optionally, the material of the handheld component is at least one of metal, polymer, wood, composite material, rubber, EVA foam, and silicone.

Optionally, the first end of the handheld component is provided with a first connecting component, the second end of the handheld component is provided with a second connecting component, and the first head component is connected to the first end of the handheld component through the first connecting component, and the second head component is connected to the second end of the handheld component through the second connecting component.

Optionally, the handheld component is movably connected to the first head component, and the handheld component is movably connected to the second head component.

Optionally, the handheld component is connected to the first head component by a threaded connection; and the handheld component is connected to the second head component by a threaded connection.

Optionally, a first connecting auxiliary component is provided between the handheld component and the first head component, and a second connecting auxiliary component is provided between the handheld component and the second head component.

Optionally, the first connecting auxiliary component and the second connecting auxiliary component at least include a washer.

Optionally, the component material of the first head component and the second head component includes at least metal.

Optionally, a first cavity is provided in the first head component, and the first cavity is filled with a first filling component, and the first filling component moves within the first cavity as the exercise device moves.

A second cavity is provided in the second head component, and the second cavity is filled with a second filling component, and the second filling component moves within the second cavity as the second head component moves.

Optionally, the first filling component and the second filling component are fillers of variable material and/or quantity, so that the first head component and the second head component achieve a preset mass.

Optionally, the first filling component and the second filling component include at least metal particles.

Compared with the prior art, this application has the following advantages:

An exercise device provided by the embodiment of the present application includes a handheld component, a first head component and a second head component; the first head component is connected to the first end of the handheld component; the second head component is connected to the second end of the handheld component; the handheld component includes: a palm support structure; the palm support structure is located on the first side of the handheld component in the longitudinal direction, so that the palm support structure is in contact with the user's palm when the user holds the exercise device, and the longitudinal direction of the handheld component is parallel to the axis passing through the first end and the second end. Through the palm support structure located on the first side of the handheld component in the longitudinal direction, the palm support structure is in contact with the user's palm when the user holds the exercise device, avoiding excessive extension or bending, reducing the control force required from the user's hand for controlling the exercise device when holding the exercise device for exercise, and thereby keeping the hand in a natural state after holding the handheld component, improving the user's grip strength when holding the exercise device, and improving the user's ability to control the dumbbell.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic structural diagram of the exercise device provided by an embodiment of the present application;

FIG. 2 is a cross-sectional view along the A-A direction in FIG. 1 provided by an embodiment of the present application;

FIG. 3 is an exploded view of the exercise device shown in FIG. 1 provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of the first head component provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of the second head component provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of the handheld component provided by an embodiment of the present application;

FIG. 7 is a cross-sectional view of the handheld component along the B-B direction in FIG. 6 provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of the user's hand provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of the user holding the exercise device of FIG. 1 provided by an embodiment of the present application;

FIG. 10 is a schematic cross-sectional view of the handheld component at different positions perpendicular to the longitudinal direction provided by an embodiment of the present application;

FIG. 11 is an optional size schematic diagram of the exercise device provided by an embodiment of the present application.

FIG. 12(a)-FIG. 12(d) are schematic diagrams of an optional size of an exercise device provided by an embodiment of the present application.

FIG. 13 is a cross-sectional view along C-C in FIG. 11 of an exercise device provided by an embodiment of the present application.

Among them, in the figures, 100 is an exercise device; 200 is another exercise device; 10 is the handheld component; 101a is the first side; 101b is the second side; 101c is the third side; 101d is the fourth side; 103 is the second groove structure; 105 is the third groove structure; 107 is the fourth groove structure; 109 is the fifth groove structure; 10a is the first protruding structure; 10b is the second protruding structure; 10c is the third protruding structure; 10d is the palm support structure; 20 is the first head component; 40 is the second head component; 201 is the first cavity; 202 is the first filling component; 401 is the second cavity; 402 is the second filling component; 30 is the first connecting auxiliary component; 50 is the second connecting auxiliary component; 130 is the first connecting component; 150 is the second connecting component.

DETAILED DESCRIPTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings so that those skilled in the art can easily implement them. As understood by those skilled in the art, the following embodiments may be modified into various forms without departing from the concept and scope of the present invention. The invention may be embodied in many different forms and is not limited to the embodiments disclosed herein.

The technical terms used in this application are used only to describe specific embodiments and are not intended to limit the invention. Unless otherwise explicitly defined, the singular form used herein includes the plural form. The term “include” means enumerating a particular attribute, region, integer, step, operation, element, and/or component, but does not exclude the presence or addition of another particular attribute, region, integer, step, operation, element, component, and/or combinations thereof.

In the description of this application, it should be understood that if the terms such as “center”, “longitudinal”, “lateral”, “longitudinal”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, and “circumferential” are used herein, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation on the present application.

In this application, unless otherwise specified and limited, if the terms such as “install”, “connect”, “connected”, and “fixed” are used herein, these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integrated connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, or it may be an internal connection between two elements or an interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in this application may be understood according to specific circumstances.

It should be noted that if an element is described as being “fixed to” or “provided on” another element, it may be directly on the other element or there may also be an intermediate element. If an element is described as being “connected to” another element, it may be directly connected to the other element or there may also be an intermediate element. If present, the terms “vertical”, “horizontal”, “upper”, “lower”, “left”, “right” and similar expressions used in this application are only for illustrative purposes and are not intended to be the only means of implementation.

In this application, unless otherwise explicitly specified and limited, if a first feature is described as being “on” or “below” a second feature or similar descriptions, the meaning may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, the first feature “above”, “over” and “on” the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. The first feature “below”, “under” and “beneath” the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

In addition, if the terms “first” and “second” are used herein, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Therefore, a feature defined as “first” or “second” may explicitly or implicitly include at least one such feature. In the description of this application, if there is the term “multiple”, the meaning of “multiple” is at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

Dumbbells are a type of free-weight equipment widely used in fitness and strength training. It is mainly composed of a handle in the middle and weight blocks at both ends, wherein, the weight of the weight blocks at both ends can be adjusted, and the settings of different exercise intensities can be achieved by adjusting the weight of the weight blocks.

When using dumbbells for exercise, the handle in the middle and the weight blocks at both ends provide external resistance to the user's muscles and joints. When the user completes the predetermined action, the user's muscles and joints need to overcome external resistance to move the dumbbell. When overcoming the external resistance to move the dumbbell, the user's muscles switch between shortening to create tension and lengthening to release the tension. With continued training, the user's muscles will undergo adaptive changes to this repeated tension and become stronger. At the same time, exercising with dumbbells can also improve muscle endurance and explosive power.

When completing the predetermined action, the user controls the rotation of the dumbbell through the hands and wrists. During the rotation, the position or angle of the dumbbell is changed, and if the user grips the dumbbell unstably, there will be a dumbbell control error, which may cause accidental injuries to the user, such as muscle strains or tears, joint sprains or injuries, etc.

In order to solve the above-mentioned problem of dumbbell control error due to the user's unstable grip on the dumbbell when using the dumbbell, an embodiment of the present application provides an exercise device. FIG. 1 shows a schematic structural diagram of the exercise device provided by an embodiment of the present application. FIG. 2 shows a cross-sectional view along the A-A direction in FIG. 1 provided by an embodiment of the present application. The exercise device 100 includes: a handheld component 10, a first head component 20 and a second head component 40.

The handheld component 10 is configured to grasp the exercise device 100; the first head component 20 is connected to the first end of the handheld component 10; the second head component 40 is connected to the second end of the handheld component 10; the first head component 20 and the second head component 40 have preset masses and are configured to provide resistance;

Optionally, the handheld component 10 is movably attached to the first head component 20, and the handheld component 10 is movably attached to the second head component 40. Among them, the movable attachment may be any one of a pin connection, a hinge connection, a pivot connection, a threaded connection, a snap-fit connection or other locking connections, and may also be other forms of movable connections in addition to those listed above. The specific form of the movable connection is not specifically limited in the embodiments of this application.

For example, the handheld component 10 is connected to the first head component 20 by a threaded connection, and the handheld component 10 is connected to the second head component 40 by a threaded connection. Alternatively, the handheld component 10 is connected to the first head component 20 by a threaded connection, and the handheld component 10 is connected to the second head component 40 by a snap-fit connection, etc.

Optionally, the handheld component 10 is fixedly connected to the first head component 20, and the handheld component 10 is fixedly connected to the second head component 40. The fixed connection may be any one of a key connection, a riveted connection, or a welded connection, and may also be other forms of fixed connections in addition to those listed above. The specific form of the fixed connection is not specifically limited in the embodiments of this application.

For example, the handheld component 10 is connected to the first head component 20 by a welded connection, and the handheld component 10 is connected to the second head component 40 by a welded connection. Alternatively, the handheld component 10, the first head component 20 and the second head component 40 are integrally formed.

Preferably, the handheld component 10 is connected to the first head component 20 by a threaded connection, and the handheld component 10 is connected to the second head component 40 by a threaded connection.

In the embodiment of the present application, connecting the handheld component 10 with the first head component 20 and connecting the handheld component 10 with the second head component 40 by a threaded connection not only facilitates the assembly and disassembly between the handheld component 10 and the first head component 20, and between the handheld component 10 and the second head component 40, but also stabilizes the fastening force between the handheld component 10 and the first head component 20, and between the handheld component 10 and the second head component 40. By adjusting the tightening torque, the tightness of the threaded connection can be controlled to ensure the sealing and stability between the handheld component 10 and the first head component 20, and between the handheld component 10 and the second head component 40. The threaded connection allows for an even distribution of stress between the handheld component 10 and the first head component 20, and between the handheld component 10 and the second head component 40, reducing the damage to the exercise device 100 caused by localized stress concentration, thereby improving the strength and lifespan of the exercise device 100.

It should be noted that the threaded connection is suitable for various materials (such as metal and plastics), that is, the threaded connection can be applied to the connection between the handheld component 10, the first head component 20 and the second head component 40 of different materials.

In some embodiments, as illustrated in FIG. 3, an exploded view of the exercise device shown in FIG. 1 is provided by the embodiment of the present application. The exercise device includes a first connecting auxiliary component 30 is further provided between the handheld component 10 and the first head component 20, and a second connecting auxiliary component 50 is further provided between the handheld component 10 and the second head component 40.

In some embodiments, the first connecting auxiliary component 30 and the second connecting auxiliary component 50 each include at least a washer.

It should be noted that the first connecting auxiliary component 30 is configured to disperse the stress between the handheld component 10 and the first head component 20, while the second connecting auxiliary component 50 can disperse the stress between the handheld component 10 and the second head component 40. This dispersion prevents excessive localized stress from damaging the handheld component 10, the first head component 20 and the second head component 40.

The first connecting auxiliary component 30 may also be configured to seal the connection gap between the handheld component 10 and the first head component 20. Similarly, the second connecting auxiliary component 50 may be configured to seal the connection gap between the handheld component 10 and the second head component 40.

The first connecting auxiliary component 30 may further prevent the surfaces of the handheld component 10 and the first head component 20 from being scratched or damaged when the handheld component 10 is connected to the first head component 20. Likewise, the second connecting auxiliary component 50 can also prevent the surfaces of the handheld component 10 and the second head component 40 from being scratched or damaged when the handheld component 10 is connected to the second head component 40.

In some embodiments, the material of the first head component 20 and the second head component 40 includes at least one metal.

In the embodiments of the present application, the metal may be copper and its alloy (such as brass, phosphor bronze), steel and its alloy, aluminum and its alloy, cast iron, lead or other heavy metals. These metals can be manufactured into the required shapes and sizes of the first head component 20 and the second head component 40 through a variety of forming processes, such as casting, forging, stamping, extrusion, welding, and the like.

For example, the metal is heated to the melting point of each type of metal and then forms a liquid state. The liquid metal is poured into the corresponding molds of the first head component 20 and the second head component 40, and then cooled and solidified to obtain the first head component 20 and a second head component 40.

It should be noted that in order to prevent damage to the first head component 20 and the second head component 40, the surfaces of the first head component 20 and the second head component 40 need to be treated.

For example, the surfaces of the first head component 20 and the second head component 40 may be treated with chrome plating, painting, applying a rubber coating, etc.

In some embodiments, the size and weight of the first head component 20 and the second head component 40 may be the same or different, and the specific size and weight of the first head component 20 and the second head component 40 may be selected according to the user's training needs.

For example, the weights of the first head component 20 and the second head component 40 can be adjusted to multiple weight levels according to actual needs. During exercise, the user selects the corresponding weight level according to the exercise needs, such as personal comfort and control ability. Table 1 shows an example of recommended dumbbell weights for different age groups as provided by the embodiments of this application:

TABLE 1
Recommended Dumbbell Weights for Different Age Groups
as Provided by the Embodiments of This Application

Age Group	Recommended Weights of Dumbbells for Use
10-14 years old	Choose lighter weights, such as 0.5 kg-5 kg (1-10 lbs).
15-45 years old	Beginners are recommended to start with 3 kg-5 kg (6-10 lbs) per hand and
	gradually increase to 10 kg-15 kg (20-30 pounds);
	Experienced weightlifters or athletes may choose dumbbells weighing over
	20 kg (40 lbs) according to their individual needs.
46-60 years old	Beginners are recommended to start with 2.5 kg-5 kg (5-10 lbs) per hand
	and gradually increase to 5 kg-15 kg (10-30 lbs);
	Experienced weightlifters or athletes may choose the dumbbell weights
	according to their individual needs.
60 years old	Beginners should start with very light dumbbells, such as 1 kg-2.5 kg (2-5
and above	lbs), and, after gradually adapting, may increase to about 5 kg (10 lbs);
	Experienced weightlifters or athletes may choose the dumbbell weights
	according to their individual needs.

In some embodiments, the first head component 20 and the second head component 40 are solid, or are composed of a shell and a material with weight filled in the shell.

FIG. 4 shows a schematic structural diagram of the first head component 20 provided by an embodiment of the present application. A first cavity 201 is provided in the first head component 20, and the first cavity 201 is filled with the first filling component 202, and the first filling component 202 is configured to move within the first cavity 201 as the exercise device moves.

FIG. 5 shows a schematic structural diagram of the second head component 40 provided by an embodiment of the present application. A second cavity 401 is provided in the second head component 40, the second cavity 401 is filled with the second filling component 402, and the second filling component 202 is configured to move within the second cavity 401 as the exercise device moves.

In the embodiment of the present application, the first filling component 202 and the second filling component 402 may be sand, stones or gravel, glass microspheres and foam particles (such as expanded polystyrene (EPS) beads), etc. The first filling component 202 is configured to increase the weight of the first head component 20; the second filling component 402 is configured to increase the weight of the second head component 40.

It should be noted that when the user holds the exercise device 100 for exercise, the exercise device 100 moves according to the user's hand and wrist movements. As the handheld component 10 moves, the first head component 20 moves accordingly. And during the movement of the first head component 20, the first filling component 202 moves along with the movement of the first head component 20. When the user's hand and wrist movements switch from a first direction to a second direction, the first filling component 202 has already moved in the second direction along with the handheld component 10. However, the first filling component 202 is still moving in the first direction due to inertia, causing the kinetic energy of the first head component 20 to change, thereby resulting in a softer force acting on the exerciser's joints and muscles.

In the same way, when the user holds the exercise device 100 for exercise, the exercise device 100 moves according to the user's hand and wrist movements, and the second head component 40 moves according to the handheld component 10, and during the movement of the second head component 40, the second filling component 402 moves along with the movement of the second head component 40. When the user's hand and wrist movements switch from a first direction to a second direction, the second filling component 402 has already moved in the second direction along with the handheld component 10. However, the second filling component 402 is still moving in the first direction due to inertia, causing the kinetic energy of the second head component 40 to change, thereby resulting in a softer force acting on the exerciser's joints and muscles. That is to say that this change in kinetic energy results in a softer force acting on the exerciser's joints and muscles, reducing the risk of injury and providing a more comfortable exercise experience. Additionally, the second filling component 402 can interact with the inner surfaces of the second head component 40 to produce sounds during movement. So does the interaction between the first filing component and the first head component. These sounds can resemble musical tones, creating a rhythmic and soothing auditory experience for the user. This feature not only enhances the enjoyment of the exercise but also adds a unique sensory dimension to the workout, making it more engaging and comfortable for the user.

Optionally, the first filling component 202 and the second filling component 402 include at least metal particles.

In the embodiment of the present application, the metal particles may be steel shot, lead shot, etc. The metal particles are filled into the first cavity 201 and the second cavity 401 as the first filling component 202 and the second filling component 402.

In some embodiments, the first filling component 202 and the second filling component 402 are filling components with variable materials and/or quantities, so that the first head component and the second head component reach a preset mass. For example, when the weight of the exercise device 100 needs to be changed, the material and/or quantity of the metal particles can be changed, so that the first head component and the second head component can reach the preset mass to complete the predetermined exercise movement. The first head component includes a first cavity, which is filled with a first filling component. The first filling component is designed to move freely within the first cavity as the exercise device is used, adapting to the motion of the device. Similarly, the second head component includes a second cavity, which is filled with a second filling component that also moves within the second cavity in response to the movement of the second head component. The movement of the filling components within their respective cavities provides dynamic feedback and contributes to the functionality of the exercise device.

In this embodiment, the weight of the exercise device 100 can be changed by changing the material and/or quantity of the first filling component 202 and the second filling component 402, thereby allowing the same exercise device 100 to be suitable for users with different weight requirements, and increasing the utilization rate of the exercise device 100. So, the first filling component and the second filling component are fillers with variable materials and/or quantities, enabling the first head component and the second head component to reach a predetermined mass. Additionally, the first filling component and the second filling component include at least metal particles.

In some embodiments, the first head component 20 and the second head component 40 may each have a shape selected from at least one of a cube, a rectangular prism, a cone or a sphere.

Preferably, the first head component 20 and the second head component 40 are spheres.

FIG. 6 illustrates a schematic structural diagram of a handheld component 10 according to an embodiment of the present application. FIG. 7 illustrates a cross-sectional view of the handheld component 10 along the B-B direction in FIG. 6. The handheld component 10 includes a palm support structure 10d located on the first side 101a of the handheld component 10 in the longitudinal direction. The palm support structure 10d is configured to be in contact with the user's palm when the user holds the exercise device 100. The longitudinal direction of the handheld component 10 is parallel to the axis passing through its first and second ends.

The handheld component 10 further includes a second groove structure 103, a third groove structure 105, a fourth groove structure 107, and a fifth groove structure 109. These groove structures are sequentially arranged along the second side of the handheld component 10 in the longitudinal direction. The second groove structure 103 is configured to accommodate the user's index finger; the third groove structure 105 is configured to accommodate the user's middle finger; the fourth groove structure 107 is configured to accommodate the user's ring finger; and the fifth groove structure 109 is configured to accommodate the user's little finger. The second side is opposite to the first side 101a.

The handheld component 10 further includes a first groove structure (not shown in the figure), the first groove structure is provided at one end of the handheld component 10, adjacent to the first head component 20. The first groove structure (not shown in the figure) is located on the third side 101c of the handheld component 10 in the longitudinal direction for accommodating the user's thumb; the third side 101c is the connecting surface between the first side 101a and the second side;

In the embodiment of the present application, the palm support structure 10d is located on the first side 101a of the handheld component 10 along the longitudinal direction. When the user holds the exercise device, the palm support structure makes contact with the user's palm, thereby preventing excessive extension or bending. This configuration reduces the control force required by the user's hand for controlling the exercise device when holding the exercise device for exercise, thereby allowing the hand to remain in a natural state while holding the handheld component 10. This enhances the user's grip strength and improves control over the dumbbell.

Through the second groove structure 103, the third groove structure 105, the fourth groove structure 107, and the fifth groove structure 109 which are sequentially positioned along the second side of the handheld component 10 in the longitudinal direction, increase the contact area between the user's hand and the exercise device. This design further increases the friction between the handheld component 10 and the user's hand, further enhancing the user's grip strength when holding the exercise device, and improving the user's ability to control of the dumbbell. Additionally, the ergonomic alignment of these structures with the natural mechanics of the user's hand optimizes the handling of the handheld component 10.

It should be noted that, in the embodiments of the present application, the starting position of the first side 101a may be a line segment located at the contact point between the base of the thumb and the palm, and the ending position of the first side may be a line segment located at the contact point between the base of the middle finger and the palm. The starting position of the second side may be a line segment located at any point between the base joint (the joint connecting to the palm) and the middle joint of any finger.

The starting position of the second side may be a line segment located at any point between the base joint (the joint connecting to the palm) and the middle joint of any finger, and the ending position of the second side may be a line segment located at any point between the middle joint and the distal joint (the joint farthest from the palm) of any finger.

It should be noted that the ratio between the first side and the second side may vary depending on different hand sizes.

The handheld component 10 further includes a first protruding structure 10a positioned between the second groove structure 103 and the third groove structure 105, and the first protruding structure 10a is configured to connect the second groove structure 103 and the third groove structure 105, increasing the contact area between the index finger, the middle finger and the handheld component 10.

The second protruding structure 10b provided between the third groove structure 105 and the fourth groove structure 107. The second protruding structure 10b is configured to connect the third groove structure 105 and the fourth groove structure 107, increasing the contact area between the middle finger, the ring finger and the handheld component 10.

The third protruding structure 10c provided between the fourth groove structure 107 and the fifth groove structure 109. The third protruding structure 10c is configured to connect the fourth groove structure 107 and the fifth groove structure 109, thereby increasing the contact area between the ring finger, the little finger and the handheld component 10;

In the embodiment of the present application, FIG. 8 shows a schematic diagram of the user's hand provided by the embodiment of the present application. The first protruding structure 10a connects the second groove structure 103 and the third groove structure 105, the second protruding structure 10b connects the third groove structure 105 and the fourth groove structure 107, and the third protruding structure 10c connects the fourth groove structure 107 and the fifth groove structure 109. This arrangement increases the contact area between the user's index finger, middle finger, ring finger and little finger, further increasing the friction between the user's hand and the handheld component 10.

FIG. 9 shows a schematic diagram of the user holding the exercise device of FIG. 1 provided by an embodiment of the present application. When the first groove structure (not shown in the figure) is located on the third side 101c of the handheld component 10 in the longitudinal direction, the exercise device 100 provided in FIG. 1 is suitable for the user's right hand. When exercising, the user holds the handheld component 10 with the right hand, and the first head component 20 and the second head component 40 provide resistance to complete a predetermined exercise motion.

In some embodiments, the cross-section of the handheld component 10, perpendicular to the longitudinal direction, is an irregular ellipse. In many circumstances, the area of the cross-section is smaller than the cross-sectional area of the first head component and the second head component, but this is not necessary to solve problems in prior art.

Optionally, the shapes of the multiple cross-sections of the handheld component 10, perpendicular to the longitudinal direction, vary in form, to best fit users' hand.

For example, FIG. 10 shows a schematic cross-sectional view of the handheld component at different positions perpendicular to the longitudinal direction provided by an embodiment of the present application. FIG. 10(1-b) shows a cross-sectional view at the lowest point of the fifth groove structure 109 shown in FIG. 6, corresponding to the corresponding to the B1-B1 section line in FIG. 10(1-a). That is, FIG. 10(1-b) is a schematic cross-sectional view of the handheld component perpendicular to the longitudinal direction at the position corresponding to B1-B1 in FIG. 10(1-a). FIG. 10(2-b) illustrates the cross-sectional view at the highest point of the third protruding structure 10c (as shown in FIG. 6), corresponding to the B2-B2 section line in FIG. 10(2-a). FIG. 10(3-b) shows the cross-sectional view at the lowest point of the fourth groove structure 107, corresponding to the B3-B3 section line in FIG. 10(3-a). FIG. 10(4-b) presents the cross-section at the highest point of the second protruding structure 10b, as indicated by the B4-B4 line in FIG. 10(4-a). FIG. 10(5-b) shows the cross-sectional view at the lowest point of the third groove structure 105, corresponding to the B5-B5 line in FIG. 10(5-a). FIG. 10(6-b) depicts the cross-sectional view at the highest point of the first protruding structure 10a, corresponding to the B6-B6 line in FIG. 10(6-a). FIG. 10(7-b) provides the cross-sectional view at the lowest point of the second groove structure 103, corresponding to the B7-B7 line in FIG. 10(7-a).

As shown in FIG. 10, the cross-sections of the handheld component at different positions along the longitudinal direction are irregular ellipses. The shape and area of each cross-section vary, the cross-sectional view corresponding to the lowest point of the fifth groove structure 109, the cross-sectional view corresponding to the highest point of the third protruding structure 10c, the cross-sectional view corresponding to the lowest point of the fourth groove structure 107, the cross-sectional view corresponding to the highest point of the second protruding structure 10b, the cross-sectional view corresponding to the lowest point of the third groove structure 105, the cross-sectional view corresponding to the highest point of the first protruding structure 10a, and the cross-sectional view corresponding to the lowest point of the second groove structure 103 are all irregular ellipses. In geometry, a standard ellipse is typically defined by its semi-major and semi-minor axes. An “irregular” ellipse shows deviations from a standard elliptical shape. Fox example, an irregular ellipse is a geometric shape that approximates the shape of an ellipse but deviates from a perfect ellipse. This structure provides a better contact between the hand and the handheld component. The irregular ellipse design not only improves grip comfort but also contributes to more effective force distribution during weightlifting. This design ensures that the handle of the dumbbell remains stable and secure in the user's hand, even during vigorous exercise.

The cross-section of the handheld component resembles an ellipse but with varying curvature that creates an uneven boundary. The deviations from a perfect ellipse are irregularly distributed, giving the shape an asymmetrical outline. It should be noted that through the different shapes and areas of the cross-sections of the handheld component perpendicular to the longitudinal direction corresponding to different positions, the fitting area between the user's hand and the handheld component is increased, resulting in greater friction when the user holds the handheld component, improving the holding effect, and making the handheld component more consistent with the shape of the user's hand when the user holds the handheld component. The handheld component of the dumbbell having a cross-sectional shape that is an irregular ellipse, designed to enhance ergonomic comfort. The handle's cross-section, when viewed perpendicular to its length, deviates from a standard ellipse with varying curvature. In one embodiment, the major axis measures approximately 12 cm, and the minor axis measures 8 cm, with deviations ranging from 0.5 cm to 1.2 cm. For the skilled in the art, the major axis and the minor axis measures approximately at other length, which depends on a potential user's size of hand, so does the deviations range. These deviations create an ergonomic shape that conforms to the natural contours of a user's hand, providing a secure and comfortable grip. This design minimizes hand fatigue and improves exercise performance by ensuring better control and stability. The irregular ellipse shape is designed to provide a more comfortable and secure grip. The deviations from a regular elliptical shape create ergonomic contours that align with the user's fingers and palm, reducing strain and improving control during exercise. The handle's unique shape minimizes hand fatigue and enhances overall stability.

In some embodiments, the second groove structure 103, the third groove structure 105, the fourth groove structure 107, and the fifth groove structure 109 extend from the second side of the handheld component 10 in the longitudinal direction to the third side adjacent to the second side. This configuration allows the user's four fingers to fit more closely with the handheld component 10, ensuring a secure and comfortable hold during use of the exercise device 100.

Optionally, the size of the first groove structure (not shown in the figure), the second groove structure 103, the third groove structure 105, the fourth groove structure 107 and the fifth groove structure 109 may be the same or set to multiple levels according to the width of the fingers. The size of each finger's indentation (groove) should be determined based on ergonomic principles. Below are some common size ranges that can help define the dimensions of the grooves.

	Width	Depth	Note

Thumb	Approximately	3-10	mm	The thumb has a larger range of motion
indentation	15-30 mm			and greater strength
(groove)
Index, middle,	10-25 mm	3-8	mm	These three fingers are typically
and ring finger				positioned in parallel, so the indentation
indentations				should be moderate, providing support for
(groove)				the fingers without being too deep to
				avoid discomfort.
Pinky (little	10-20 mm	3-7	mm	its groove can be slightly smaller and
finger)				shallower than the others
indentation
(groove)

For example, FIG. 11 and FIG. 12 (a)-FIG. 12 (d) show an optional size schematic diagram of the exercise device provided by an embodiment of the present application. As shown in FIG. 12(a), the width of the second groove structure 103 at its widest point is calculated as 45.87 mm minus 21.09 mm, which equals 24.78 mm. The width of the third groove structure 105 at its widest point is calculated as 67.05 mm minus 45.87 mm, which equals 21.18 mm. The width of the fourth groove structure 107 at its widest point is calculated as 81.47 mm minus 67.05 mm, which equals 23.29 mm. The width of the fifth groove structure 109 at its widest point is calculated as 100.93 mm minus 81.47 mm, which equals 19.46 mm. Wherein, the width of the first groove structure at its widest point (not shown in the figure) can be slightly greater than 24.78 mm.

FIG. 12(b) shows another perspective view of FIG. 12(a). In the perspective shown in FIG. 12(a), the distance between the highest and lowest points of the cross-section at point A1 on the second groove structure 103 is 23 mm. In the perspective shown in FIG. 11(b), the length of the major axis of the elliptical cross-section at point B1 on the second groove structure 103 is 25.98 mm. In the perspective shown in FIG. 12(a), the distance between the highest and lowest points of the cross-section at point A2 on the first protruding structure 10a is 23.31 mm. In the perspective shown in FIG. 12(b), the length of the major axis of the elliptical cross-section at point B2 on the first protruding structure 10a is 27.78 mm. In the perspective shown in FIG. 12(a), the distance between the highest and lowest points of the cross-section at point A3 on the third groove structure 105 is 22.84 mm. In the perspective shown in FIG. 12(b), the length of the major axis of the elliptical cross-section at point B3 on the third groove structure 105 is 29.4 mm. In the perspective shown in FIG. 12(a), the distance between the highest and lowest points of the cross-section at point A4 on the second protruding structure 10b is 24.12 mm. In the perspective shown in FIG. 12(b), the length of the major axis of the elliptical cross-section at point B4 on the second protruding structure 10b is 34.13 mm. In the perspective shown in FIG. 11(a), the distance between the highest and lowest points of the cross-section at point A5 on the fourth groove structure 107 is 19.04 mm. In the perspective shown in FIG. 12(b), the length of the major axis of the elliptical cross-section at point B5 on the fourth groove structure 107 is 31.96 mm. In the perspective shown in FIG. 12(a), the distance between the highest and lowest points of the cross-section at point A6 on the third protruding structure 10c is 18.4 mm. In the perspective shown in FIG. 12(b), the length of the major axis of the elliptical cross-section at point B6 on the third protruding structure 10c is 34.69 mm. In the perspective shown in FIG. 12(a), the distance between the highest and lowest points of the cross-section at point A7 on the fifth groove structure is 19.07 mm. In the perspective shown in FIG. 12(b), the length of the major axis of the elliptical cross-section at point B7 on the fifth groove structure 109 is 31.25 mm.

FIG. 12(c) shows yet another perspective view of FIG. 12(a). The distance between the lowest point C1 on the second groove structure 103 and the highest point C2 on the first protruding structure 10a is 1.92 mm. That is, the depth of the second groove structure 103 at its deepest point is 1.92 mm. The distance between the lowest point C3 on the third groove structure 105 and the highest point C2 on the first protruding structure 10a is 4.55 mm. That is, the depth of the third groove structure 105 at its deepest point is 4.55 mm. The distance between the lowest point C5 on the fourth groove structure 107 and the highest point C4 on the second protruding structure 10b is 3.39 mm. That is, the depth of the fourth groove structure 107 at its deepest point is 3.39 mm. The distance between the lowest point C7 on the fifth groove structure 109 and the highest point C6 on the third protruding structure 10c is 1.82 mm. That is, the depth of the fifth groove structure 109 at its deepest point is 1.82 mm. It can be seen from this embodiment that the maximum depths of the second groove structure 103, the third groove structure 105, the fourth groove structure 107, and the fifth groove structure 109 are different, which aligns better with the ergonomic mechanics of the hand when gripping. Wherein, the depth of the first groove structure at its deepest point (not shown in the figure) can be slightly greater than 1.82 mm.

FIG. 12(d) shows yet another perspective view of FIG. 12(a). In the perspective shown in FIG. 12(c), the distance between the highest and lowest points of the cross-section at point C1 on the second groove structure 103 is 25.43 mm. In the perspective shown in FIG. 12(d), the length of the minor axis of the elliptical cross-section at point D1 on the second groove structure 103 is 22.17 mm. In the perspective shown in FIG. 12(c), the distance between the highest and lowest points of the cross-section at point C2 on the first protruding structure 10a is 27.79 mm. In the perspective shown in FIG. 12(d), the length of the minor axis of the elliptical cross-section at point D2 on the first protruding structure 10a is 23.28 mm. In the perspective shown in FIG. 12(c), the distance between the highest and lowest points of the cross-section at point C3 on the third groove structure 105 is 29.87 mm. In the perspective shown in FIG. 12(d), the length of the minor axis of the elliptical cross-section at point D3 on the third groove structure 105 is 22.84 mm. In the perspective shown in FIG. 12(c), the distance between the highest and lowest points of the cross-section at point C4 on the second protruding structure 10b is 34.13 mm. In the perspective shown in FIG. 12(d), the length of the minor axis of the elliptical cross-section at point D4 on the second protruding structure 10b is 24.12 mm. In the perspective shown in FIG. 12(c), the distance between the highest and lowest points of the cross-section at point C5 on the fourth groove structure 107 is 31.96 mm. In the perspective shown in FIG. 12(d), the length of the minor axis of the elliptical cross-section at point D5 on the fourth groove structure 107 is 19.04 mm. In the perspective shown in FIG. 12(c), the distance between the highest and lowest points of the cross-section at point C6 on the third protruding structure 10c is 34.61 mm. In the perspective shown in FIG. 12(d), the length of the minor axis of the elliptical cross-section at point D6 on the third protruding structure 10c is 18.54 mm. In the perspective shown in FIG. 12(c), the distance between the highest and lowest points of the cross-section at point C7 on the fifth groove structure is 29.86 mm. In the perspective shown in FIG. 12(d), the length of the minor axis of the elliptical cross-section at point D7 on the fifth groove structure 109 is 19.07 mm.

It can be seen from FIGS. 12(a) to 12(d) that the distances between the highest and lowest points of cross-sections at adjacent points are different under different perspectives. This indicates that cross-section of the handheld component 10 is an irregular ellipse.

The softness of the handheld component material also affects comfort. The handheld component using soft materials such as rubber or silicone can enhance grip and adaptability. These size ranges are based on average adult hand dimensions. When designing for specific user groups, such as children or adults with smaller hands, the indentation sizes should be adjusted accordingly.

A better fit between the palm and the handheld component can enhance the involvement of fascia and the entire kinetic chain through the following aspects:

• • (1). Improved Force Transmission: When the palm fits more closely to the handle, the grip becomes more even, reducing the dispersion of force between the palm and fingers. This more efficient force transmission helps activate multiple muscle groups, including those in the hand, forearm, upper arm, and shoulders, allowing the force to travel smoothly from the palm throughout the body. This transmission not only promotes better muscle coordination but also enables the fascia to participate more effectively in the movement.
  • (2). Increased Stability and Control: A better fit between the palm and the handle enhances hand stability and control over the handle. This increase in stability and control helps minimize unnecessary movements and swings of the hand, encouraging the muscles and fascia of the upper limb and the entire body to work in a more coordinated and stable manner. The result is a smoother movement that reduces over-reliance on specific muscles, thereby enhancing the participation of the entire kinetic chain.
  • (3). Enhanced Proprioceptive Feedback: When the palm and handle fit better, proprioceptive feedback becomes more pronounced. Proprioception refers to the body's ability to sense its position and movement in space. With a better fit, the body can more accurately perceive the shape, weight, and movement path of the handle. This feedback information helps the body better adjust posture and movements, thereby enhancing the involvement of the fascia and the entire kinetic chain.
  • (4). Optimized Movement Patterns: A better fit between the palm and the handle helps optimize movement patterns, as it encourages a more natural grip and movement style. When the grip is more natural, the muscles of the upper limbs and trunk work more efficiently, and the fascia bears and transmits force more evenly. Such movement patterns not only help prevent injuries but also improve overall athletic performance.
  • (5). Whole-Body Synergy: When the palm fits the handle better, other parts of the body automatically adjust to maintain balance and coordinate force. This adjustment promotes the synergy of various muscle groups and the fascial system throughout the body, especially in complex movements that require full-body involvement. By promoting whole-body synergy, a better fit between the palm and the handle can further activate and enhance the participation of fascia, improving the efficiency of the entire kinetic chain.

In summary, a better fit between the palm and the handle can enhance the involvement of fascia and the entire kinetic chain by improving force transmission efficiency, increasing stability and control, enhancing proprioceptive feedback, optimizing movement patterns, and promoting whole-body synergy. This leads to more effective and safer training outcomes, enhancing functional movement performance throughout the body.

In some embodiments, the material of the handheld component 10 is at least one of metal, polymer, wood, composite material, rubber, EVA foam, or silicone.

Preferably, the material of the handheld component 10 is a plastic material;

Preferably, the material of the handheld component 10 is a metal alloy.

In some embodiments, the shapes of the first groove structure (not shown in the figure), the second groove structure 103, the third groove structure 105, the fourth groove structure 107 and the fifth groove correspond to the shape that is comfortable for the human hand to hold.

In some embodiments, referring to FIGS. 6 and 7, a first connecting component 130 is provided at the first end where the first handheld component 101 is connected to the first head component 20; A second connecting component 150 is provided at the second end where the first handheld component 101 is connected to the second head component 40; the first head component 20 is connected to the handheld component 10 through the first connecting component 130, and the second head component 40 is connected to the handheld component 10 through the second connecting component 150.

In the embodiment of the present application, the shape of the first connecting component 130 corresponds to the shape of the first head component 20, so that the handheld component 10 and the first head component 20 are in a natural transition state, allowing the handheld component 10 to fit more closely with the first head component 20. The shape of the second connecting component 150 corresponds to the shape of the second head component 40, so that the handheld component 10 and the second head component 40 are in a natural transition state, allowing the handheld component 10 to fit more closely with the second head component 40.

FIG. 12 shows a schematic structural diagram of another exercise device provided by the embodiment of the present application. The exercise device 200 includes: a handheld component 10, a first head component 20 and a second head component 40;

The handheld component 10 is configured to grasp the exercise device 200; the first head component 20 is connected to the first end of the handheld component 10; the second head component 40 is connected to the second end of the handheld component 10; the first head component 20 and the second head component 40 have preset masses and can be configured to provide resistance;

The handheld component 10 includes: a palm support structure 10d provided on the handheld component 10, and the palm support structure 10d is located on the first side 101a of the handheld component 10 in the longitudinal direction, and the palm support structure 10d is in contact with the user's palm when the user holds the exercise device 100; wherein, the longitudinal direction of the handheld component 10 is parallel to the axis passing through the first end and the second end.

The second groove structure 103, the third groove structure 105, the fourth groove structure 107, and the fifth groove structure 109 are sequentially provided on the second side 101b of the handheld component 10 in the longitudinal direction. The second groove structure 103 is configured to accommodate the user's index finger; the third groove structure 105 is configured to accommodate the user's middle finger; the fourth groove structure 107 is configured to accommodate the user's ring finger; the fifth groove structure 109 is configured to accommodate the user's little finger; the second side 101b is the opposite side to the first side 101a.

The first groove structure (not shown in the figure) is provided on one end of the handheld component 10 near the first head component 20, and the first groove structure (not shown in the figure) is located on the fourth side 101d of the handheld component 10 in the longitudinal direction and is configured to accommodate the user's thumb; the third side 101d is the connecting surface between the first side 101a and the second side 101b; the third side 101c and the fourth side 101d are opposite sides to each other;

It should be noted that when the first groove structure (not shown in the figure) is located on the fourth side 101d of the handheld component 10 in the longitudinal direction, the exercise device 200 provided in FIG. 11 is suitable for the user's left hand. When exercising, the user holds the handheld component 10 with the left hand, and the first head component 20 and the second head component 40 provide resistance to complete predetermined training movements.

For other descriptions of the exercise device 200, please refer to the corresponding description of the exercise device 100, which will not be described again in this embodiment.

In the description of this specification, the use of terms such as “some embodiments” or “other embodiments” indicates that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

The various technical features of the embodiments described above may be combined in any manner. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as the combinations of these technical features are not contradictory, they should be considered to be within the scope of this specification.

The above-described embodiments only express several embodiments of the present application, which are described in a specific and detailed manner, but should not be construed as limiting the scope of the present application. It should be noted that, those skilled in the art may make various modifications and improvements without departing from the concept of the present application, and these all fall within the scope of protection of the present application. Therefore, the scope of protection of this application should be determined by the appended claims.