ADJUSTABLE DUMBBELL STRUCTURE

Description

FIELD OF THE DISCLOSURE

The present disclosure is related to an adjustable dumbbell structure, and more particularly, to an adjustment structure in the fitness field.

BACKGROUND OF THE DISCLOSURE

The present disclosure is related to commonly used sports equipment, such as dumbbells. There are many types of dumbbells. Some dumbbells are formed-in-one and have different dumbbell sets, for example, as disclosed in Patent No. M581492, entitled “Weight training intelligence system.” Some dumbbells are provided with a single grip handle, which allows the user to increase or decrease the number of weight plates at both ends of the handle, thereby increasing or decreasing the overall weight. Patent No. I576135, entitled “Dumbbell set that is easy to fix and store.” To sum up, different types of dumbbells allow users to choose the weight they can operate for fitness use.

For the dumbbell mentioned above models that can provide replaceable weight plates, users are most concerned about the convenience of replacing the weight plates. Many dumbbell models that can adjust weight plates are too troublesome; for example, the entire set of weight plates must be removed during adjustment, or the replacement and adjustment mechanisms are too complex and complicated. Users sometimes simply forget their suitable weight until they lift the dumbbell and realize it is too heavy or too light. In addition, some dumbbells provide a switching mechanism on the weight plates to adjust the weight (due to the weight plates being engaged with each other, and the switching mechanism is used to release and lock the engagement between the weight plates). In this way, the users must switch one by one and check the switching mechanism on the weight plate to find out. This is too troublesome for users, and the switching mechanism is too complicated. There are too many spare parts, which will increase the cost of repair and maintenance.

SUMMARY OF THE DISCLOSURE

The primary purpose of the present disclosure is to provide users with the dumbbell with quick and accurate adjustment to choose the appropriate sets of weight plates, and it can be quickly readjusted even if the weight is not suitable.

The present disclosure provides an adjustable dumbbell structure, including: a base, having a frame and two positioning units disposed on both sides of an inner wall of the frame; wherein the two positioning units includes two locking convex portions correspondingly facing to each other; a plurality of weight plate sets, detachably stacked together and then assembled with the locking convex portions of the positioning unit; wherein each of the plurality of weight plate sets has an first assembling portion and a second assembling portion on both sides; wherein the second assembling portion of one of the weight plate set is movably assembled with the first assembling portion of another one of the weight plate set; wherein some of the first assembling portions of the weight plate set are movable and assembled with the locking convex portion of the positioning unit; wherein each of the locking convex portions and each of the second assembling portions include a locking space, and each of the locking space includes an inlet and a side outlet; wherein each of the first assembling portions of the weight plate sets is recessed to form a first slot at the corresponding side outlet; a plurality of latch sets, correspondingly disposed in the locking space of the locking convex portion and the second assembling portion; wherein each of the plurality of latch sets includes an elastic member, a latch member and a protruding pin; wherein one end of the elastic member abuts against an inner wall of the locking space, the other end of the elastic member is sleeved on one end of the latch member, the other end of the latch member is pushed by the elastic member to protrude out of the locking space and snap into the first slot, and the protruding pin is disposed on one side of the latch member and corresponds to the inlet; a control piece, movably inserted in any of the locking space; wherein when the control piece inserts into the inlet of any of the locking space, the control piece pushes the protruding pin located in the locking space, the protruding pin abuts and drives the latch member to elastically compress the elastic member, and simultaneously releases the engagement between the latch member and the first slot; and a handle set, including a handle and two connecting units respectively disposed on two ends of the handle; wherein each of the two connecting units has a connecting portion recessed on one side corresponding to the positioning unit, and the connecting portion has a second slot corresponding to the side outlet of the second assembling portion; wherein the latch member located in the second assembling portion is generally engaged in the second slot.

BRIEF DESCRIPTION OF THE DRAWINGS

The described embodiments may be better understood by reference to the following description and the accompanying drawings in which:

FIG. 1 is a perspective schematic view of one embodiment of the present disclosure;

FIG. 2 is an exploded schematic view of the base and the weight plate sets of the present disclosure;

FIG. 3 is an exploded perspective schematic view of the base of the present disclosure;

FIG. 4 is a perspective schematic view of another angle of FIG. 3;

FIG. 5 is a sectional schematic view of line V-V of FIG. 2;

FIG. 6 is a partially exploded schematic view of the weight plate set of FIG. 2;

FIG. 7 is a perspective schematic view of another angle of FIG. 6;

FIG. 8 is a sectional schematic view of line VIII-VIII of FIG. 2;

FIG. 9 is a sectional schematic view of line IX-IX of FIG. 1;

FIG. 10 is a sectional schematic view of line X-X of FIG. 1;

FIG. 11 is a schematic view of the movement of removing the control piece of the present disclosure;

FIG. 12 is a schematic view of the movement of inserting the control piece into one of the locking space of the present disclosure;

FIG. 13 is a sectional schematic view of line XIII-XIII of FIG. 12;

FIG. 14 is a schematic view of the movement that the control piece of FIG. 13 is inserted into the structure, and the guiding bevel of the driving segment abuts the protruding pin;

FIG. 15 is a schematic view of movement that the control piece of FIG. 14 abuts the protruding pin, the elastic member is compressed, and simultaneously releases the engagement between the latch member and the first slot; and

FIG. 16 is a schematic view of movement that the control piece of FIG. 15 is completely inserted into the locking space, and the protruding pin is engaged at the arc notch by the elasticity of the elastic member.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

Referring to FIGS. 1-16, an adjustable dumbbell structure is provided. The adjustable dumbbell structure includes a base, a plurality of weight plate sets 2, a plurality of latch sets 4, a control piece 5, and a handle set 6. The base 1 has a frame 11 and two positioning units 12 disposed on both sides of an inner wall of the frame 11. The two positioning units 12 include two locking convex portions 13 correspondingly facing each other.

The plurality of weight plate sets 2 are mainly used to increase or decrease weight, and the plurality of weight plate sets 2 can be movably assembled and stacked together. For example, the plurality of weight plate sets 2 are assembled and stacked together and then assembled with the locking convex portion 13 of the positioning unit 12. Each of the plurality of weight plate sets 2 has a first assembling portion 21 and a second assembling portion 22 on both sides, and the second assembling portion 22 of one of the weight plate set 2 is movably assembled with the first assembling portion 21 of another one of the weight plate set 2.

Further, some of the first assembling portions 21 of the weight plate sets 2 are movable and assembled with the locking convex portion 13 of the positioning unit 12. Each of the locking convex portions 13 and each of the second assembling portions 22 include a locking space 3. Further, each of the locking spaces 3 includes an inlet 31 and a side outlet 32. (In the present disclosure, the inlet 31 is located on the upper end of the

locking convex portion 13 and the second assembling portion 22, and the side outlet 32 is located on the side of the locking convex portion 13 and the second assembling portion 22.

The foregoing description is presented only for the purposes of illustration and description and is not intended to limit the location/position of the inlet 31 and the side outlet 32 of the present disclosure. Each of the first assembling portions 21 of the weight plate set 2 is recessed to form a first slot 33 at the corresponding side outlet 32.

The plurality of latch sets 4 are correspondingly disposed in the locking space 3 of the locking convex portion 13 and the second assembling portion 22. Each of the plurality of latch sets 4 includes an elastic member 41, a latch member 42, and a protruding pin 43. One end of the elastic member 41 abuts against an inner wall of the locking space 3, the other end of the elastic member 41 is sleeved on one end of the latch member 42, the other end of the latch member 42 is pushed by the elastic member 41 to protrude out of the side outlet 32 of the locking space 3 and snap into the first slot 33, and the protruding pin 43 is disposed on one side of the latch member 42 and corresponds to the inlet 31.

The control piece 5 is movably inserted in one of the locking space 3. When the control piece 5 is inserted into the inlet 31 of one of the locking space 3, the control piece 5 pushes the protruding pin 43 located in the locking space 3, the protruding pin 43 abuts and drives the latch member 42 to elastically compress the elastic member 41, and simultaneously releases the engagement between the latch member 42 and the first slot 33. The handle set 6 includes a handle 61 and two connecting units 62 respectively disposed on two ends of the handle 61. Each of the two connecting units 62 has a connecting portion 63 recessed on one side corresponding to the positioning unit 12, and the connecting portion 62 has a second slot 64 corresponding to the side outlet 32

of the second assembling portion 22. The latch member 42 located in the second assembling portion 22 is generally engaged in the second slot 64.

According to the above description of the technical features of the present disclosure, the user only needs to pull out the control piece 5 to adjust the combination between the weight plate sets 2. Firstly, pull out the control piece 5 initially inserted in the locking space 3 of the locking convex portion 13, select the appropriate number of weight plate sets 2, and insert the control piece 5 into the locking space 3 between the plurality of weight plate sets 2.

The control piece 5 is inserted from the inlet 31 and continues to reach the protruding pin 43. The protruding pin 43 is pushed laterally by the control piece 5. The movement of the protruding pin 43 links the latch member 42 to move together. Further, the latch member 42 moves and abuts the elastic member 41 with one end, so that the elastic member is elastically compressed, and the other end of the latch member 42 gradually disengages with the first slot 33. When the latch member 42 is completely disengaged from the first slot 33, the user can hold the handle 61 to lift the weight plate sets 2 with the connecting unit 62 together and away the frame 1. In this way, it can be operated for fitness training.

For the user, the weight of the weight plate sets 2 can be adjusted only by plugging and unplugging the control piece 5, which saves effort and time. It is also easier to recognize the currently selected weight through the position of the control piece 5. In conventional technology, the dumbbell structure requires adjusting the switching structure of the weight plates one by one, resulting in errors in judgment, time-consuming, excessive labor, and high costs in repairs and maintenance. For users in this field, the structure of the present disclosure can not only save costs, but also reduce excessive costs on replacement and maintenance.

According to the above description, the detailed technical features of the present disclosure will be further described below. Firstly, as shown in FIGS. 2-6. To provide a stable combination between the positioning unit 12 and the weight plate set 2, each of the two positioning units 12 further includes a shell piece 121 and a blocking piece 122, wherein the shell piece 121 is threadedly engaged with the blocking piece 122 on one side, and the locking convex portion 13 is threadedly engaged with the blocking piece 122 on the other side; wherein a temporary storage space 123 is formed between the shell piece 121 and the blocking piece 122.

The use of the temporary storage space 123 is similar to the locking space 3, but the temporary storage space 123 is only provided to the user if all of the weight plate sets 2 are selected and assembled. The control piece 5 can be inserted into the temporary storage space 123 to avoid being lost. Further, the temporary storage space 123 has an access opening 124 at the same side as the inlet 31 for inserting the control piece 5 into the temporary storage space 123.

Moreover, each of the shell pieces 121 has a third slot 125 recessed at the position corresponding to the temporary storage space 123 and the access opening 124, so that when the control piece 5 is inserted into the temporary storage space 123 through the access opening 124, part of the control piece 5 is exposed in the third slot 125; wherein the third slot 125 has two third slot ribs 126 protruding from both side walls of the third slot 125, and the control piece 5 has the same numbers of rib notches 51 as the third slot ribs 126. When the control piece 5 is inserted into the temporary storage space 123, the rib notches 51 are positioned and engaged with the third slot ribs 126. Therefore, this structure ensures that the control piece 5 can be reliably placed when not in use to avoid being lost or falling off, which can be shown in FIG. 1 and FIG. 2.

In addition, in order to provide a way for the weight plate sets 2 to be stable when not in use, the shell piece 121 has a first groove 1211 recessed on a side opposite to the blocking piece 122, and the frame 11 is composed of two frame plates 110 in a C-shape; wherein each of the two frame plates 110 connects to the two first grooves 1211 of the two shell pieces 121 correspondingly. Thereby, the two positioning units 12 and the frame 11 can be firmly engaged to form the base 1, to provide a space to place the weight plate set 2 and the handle set 6 when the structure is not in use or after use, as shown in FIG. 2.

Further, in order to illustrate the engagement between the positioning unit 12 and the weight plate set 2, as shown in FIGS. 3-10, the engagement between the positioning unit 12 and the weight plate set 2, and the engagement between the weight plate set 2 and the weight plate set 2 are mainly through the use of the locking convex portion 13 and the second assembling portion 22, and combined with the corresponding first assembling portion 21.

Thus, each of the locking convex portions 13 and each of the second assembling portions 22 include a first piece 7, a second piece 8, and a third piece 9 overlapping together to form the space and openings of the locking space 3, the inlet 31 and the side outlet 32. Moreover, the first piece 7 has a lateral (transverse direction) long-groove-shaped receiving groove 71, the second piece 8 has a longitudinal (from top to bottom direction) sliding groove 81 and a limiting groove (in the same direction as the receiving groove 71) recessed on one side of the sliding groove 81.

In addition, one end of the elastic member 41 is located in the limiting groove 82 and abuts against the bottom of the limiting groove 82, and the other end of the elastic member 41 is sleeved on the latch member 42. The third piece 9 has a lateral pin groove 91 (in the same direction as the receiving groove 71 and the limiting groove 82) to accommodate the protruding pin 43 moving within the pin groove 91.

The control piece 5 is inserted from the inlet 31 of the locking space 3 into the sliding groove 81 of the second piece 8 until it reaches the protruding pin 43, and the control piece 5 pushes the protruding pin 43 to move within the sliding groove 81 of the third piece 9. The movement of the protruding pin 43 leads the latch member 42 to move toward and compress the elastic member 41, simultaneously releasing the engagement with the first slot 33. Therefore, the engagement between the weight plate set 2 and the weight plate set 2, or the engagement between the weight plate set 2 and the positioning unit 12 can be released, so that the user can train with the suitable weight.

In addition to the locking convex portion 13 of the positioning unit 12 and the second assembling portion 22 of the weight plate set 2, the first assembling portion 21, in conjunction with the connecting portion 63 of the connecting unit 62, are also significant.

In detail, each of the first assembling portions 21 of the weight plate sets 2 includes a main board 10, two front boards 20, and two rear boards 30, and each of the connecting portions 63 of the connecting unit 62 includes a main board 10, two front boards 20, and two rear boards 30. The main board 10, the two front boards 20, and the two rear boards 30 overlap together to form an assembling groove 40; wherein the two front boards 20 and the two rear boards 30 are disposed on the same side of the main board 10, and the two rear boards 30 are disposed between the two front board 20 and the main board 10; wherein the second assembling portion 22 of each of the weight plate

sets 2, and the locking convex portion 13 of each of the positioning units 12 are movably assembled in the corresponding assembling grooves 40; wherein the first slot 33 of the connecting portion 63 of the connecting unit 62 and the first slot 33 of the first assembling portion 21 of the weight plate set 2 are formed on one side of the front boards 20 and corresponding to the latch member 42.

Thus, the main board 10, two front boards 20, and two rear boards 30 engage with the locking convex portion 13 and the second assembling portion 22 by the assembling groove 40. Further, the first slot 33 matches the latch member 42. In this way, the control piece 5 can be firmly engaged when it is not inserted into the structure, and the engagement can be released after the control piece 5 is inserted into the structure.

After explaining the structural composition of the weight plate sets 2, the detailed features of the control piece 5 will be described. In order to smoothly push the latch member 42 to move, the control piece 5 further includes a control segment 52 in the shape of a long piece and is hollowed out in the center, a body segment 53 in the shape of a long piece, a positioning segment 54 and a driving segment 55 in the shape of a pointed cone piece. One end of the body segment 53 is connected to the control segment 52, the other end of the body segment 53 is connected to one end of the positioning segment 54, and the other end of the positioning segment 54 is connected to the driving segment 55.

Further, the positioning segment 54 has an arc notch 541 matching the protruding pin 43 when the control piece 5 is inserted into the structure. The control piece 5 pushes the protruding pin 43 with the driving segment 55, and the elastic member 41 is compressed simultaneously. When the protruding pin 43 contacts the arc notch 541, the compressed elastic member 41 elastically resets and pushes the protruding pin 43 to be engaged in the arc notch 541, so that the length of the latch member 42 protruding out of the side outlet 32 is limited. In this way, the positioning of the control piece 5 after insertion can be limited, and the control piece 5 can be prevented from falling off during the use of weight plate sets 2, as shown in FIG. 3, and 14-16.

Finally, according to the previous paragraph, in order to allow the driving segment 55 of the control piece 5 to push the protruding pin 43 smoothly, the driving segment 55 of the control segment 5 has a guiding bevel 551 at the opposite end connecting to the positioning segment 54 and corresponding to the position of the protruding pin 43. The figures of the present disclosure show that the end of the driving segment 55 with two guide bevels 551, but is not intended to limit the shape of the driving segment 55 with two guide bevels 551, the main feature is to correspond to the position of the protruding pin 43. Further, the protruding pin is in a cylindrical post shape. The driving segment 55 pushes the protruding pin 43 with the guiding bevel 551 after the control piece 5 is inserted with the driving segment 55 from the inlet 31 of the locking space 3. Thus, through the insertion of the control piece 5, the protruding pin 43 can be reliably pushed to move, so that the latch member 42 can be driven to release the engagement with the first slot 33, so that the user can reliably choose the suitable weight (As shown in FIG. 3, and 14-16).