PRE-COMPRESSED ELASTIC MODULE AND ELASTIC CUSHION

Description

RELATED APPLICATIONS

This application claims priority to Chinese patent application number 202411177929.1, filed on Aug. 26, 2024. Chinese patent application number 202411177929.1 is incorporated herein by reference.

FIELD OF THE DISCLOSURE

The present disclosure relates to the field of furniture, and in particular to a pre-compressed elastic module and an elastic cushion.

BACKGROUND OF THE DISCLOSURE

Beds and sofas are essential furniture in daily lives of people. Elastic cushions have become an important component of most beds and sofas due to their softness, comfort, good breathability, and long service life. However, traditional elastic cushions are not pre-compressed when leaving the factory, and some problems caused by this affect user experience. For example, the elastic cushion produces a large deformation when the user lies down, which appears too soft. For people with fragile bones or blood circulation, such as the elderly, children, and patients, the elastic cushion does not provide good comfort and health safety. Secondly, elastic cushions are prone to permanent deformation due to elastic fatigue during long-term use, which is inevitable. Traditional elastic cushions that have not been pre-compressed produce large permanent deformation after elastic fatigue, which aggravates the uneven collapse between the frequently stressed areas and other areas and shortens the service life of the elastic cushion. Therefore, there is an urgent need to invent a pre-tightened elastic cushion to solve the above problems, thereby improving the comfort and service life of the elastic cushion.

BRIEF SUMMARY OF THE DISCLOSURE

The main purpose of the present disclosure is to provide a pre-compressed elastic cushion to solve a problem that the traditional elastic cushion deforms too much when under pressure and collapses obviously and unevenly after long-term use.

In order to solve the above technical problems, the present disclosure provides a pre-compressed elastic module, and the pre-compressed elastic module comprises a first spring, a first end cover, a second end cover, and a first flexible connecting member.

The first end cover and the second end cover are arranged opposite to each other, and the first spring is fixed between the first end cover and the second end cover.

When the first spring is in an initial state, a length of the first spring is less than a free length of the first spring.

A first end of the first flexible connecting member is connected to the first end cover, and a second end of the first flexible connecting member is connected to the second end cover. When the first spring is in the initial state, the first flexible connecting member inhibits separation movement between the first end cover and the second end cover.

In a preferred embodiment, the first end cover comprises a first fixing portion configured to fix a first end of the first spring. The second end cover comprises a second fixing portion configured to fix a second end of the first spring.

When the first spring is in the initial state, a vertical distance between the first fixing portion and the second fixing portion is less than the free length of the first spring.

In a preferred embodiment, one of the first end cover or the second end cover comprises a first position-providing hole, and the first flexible connecting member passes through the first position-providing hole to be configured to move axially relative to the one of the first end cover or the second end cover. The first end of the first flexible connecting member comprises a first end cap. When the first spring is in the initial state, the first flexible connecting member is configured to be interlocked with the one of the first end cover or the second end cover along a direction of a restoring force of the first spring.

In a preferred embodiment, a surface of the first flexible connecting member comprises a first position-limiting member. When the first spring is compressed, the first position-limiting member is configured to be interlocked with the one of the first end cover or the second end cover in an expansion and contraction direction of the first spring.

In a preferred embodiment, the first position-limiting member is a double-layered buckling ring, and the double-layered buckling ring extends radially.

The double-layered buckling ring comprises a first buckling ring and a second buckling ring, and a distance between the first buckling ring and the second buckling ring is no less than a thickness of the first end cover. The first buckling ring and the second buckling ring are configured to be buckled to two sides of the one of the first end cover or the second end cover due to an external force, so that the first buckling ring and the second buckling ring are configured to be interlocked with the one of the first end cover or the second end cover in the expansion and contraction direction of the first spring.

In a preferred embodiment, the first spring has a conical structure.

The present disclosure provides an elastic cushion, and the elastic cushion comprises a plurality of the pre-compressed elastic modules.

In a preferred embodiment, the elastic cushion comprises two or more layers of the plurality of the pre-compressed elastic modules. Two adjacent pre-compressed elastic modules of the plurality of the pre-compressed elastic modules respectively on the two or more layers of the plurality of the pre-compressed elastic modules are detachably connected to each other.

In a preferred embodiment, a bottom of one of the plurality of the pre-compressed elastic modules located in an upper layer of the two or more layers of the pre-compressed elastic modules is recessed to define a female buckling member, and a width of the female buckling member gradually decreases or remains constant along a recessed direction.

A top of a second one of the plurality of the pre-compressed elastic modules located in a lower layer of the two or more layers of the pre-compressed elastic modules comprises a male buckling member protruding outward. The male buckling member is configured to be nested within the female buckling member on the upper layer, so that the female buckling member is fixed in position along a width direction of the female buckling member.

The present disclosure provides a pre-compressed elastic module, and the pre-compressed elastic module comprises a first spring, a second spring, a first end cover, a second end cover, a middle ring, and a first flexible connecting member.

The first end cover and the second end cover are arranged opposite to each other and are located on two sides of a plane on which the middle ring is located. The first spring is fixedly connected to and disposed between the first end cover and the middle ring, and the second spring is fixedly connected to and disposed between the second end cover and the middle ring.

When the first spring and the second spring are in an initial state, a length of the first spring is less than a free length of the first spring, a length of the second spring is less than a free length of the second spring, and the first flexible connecting member is configured to inhibit separation movement between the first end cover and the middle ring and separation movement between the second end cover and the middle ring.

In a preferred embodiment, the first end cover comprises a first fixing portion configured to fix a first end of the first spring, and the second end cover comprises a second fixing portion configured to fix a first end of the second spring. The middle ring comprises a third fixing portion and a fourth fixing portion, which are respectively configured to fix a second end of the first spring and a second end of the second spring.

When the first spring is in the initial state, a vertical distance between the first fixing portion and the third fixing portion is less than the free length of the first spring. When the second spring is in the initial state, a vertical distance between the second fixing portion and the fourth fixing portion is less than the free length of the second spring.

In a preferred embodiment, the first flexible connecting member is a single-part structure. The first flexible connecting member passes through the middle ring. A first end of the first flexible connecting member is connected to the first end cover, and a second end of the first flexible connecting member is connected to the second end cover.

In a preferred embodiment, the first flexible connecting member is a two-part structure, and the first flexible connecting member comprises a first sub connecting member and a second sub connecting member. A first end of the first sub connecting member is connected to the first end cover, and a second end of the first sub connecting member is connected to the middle ring. A first end of the second sub connecting member is connected to the second end cover, and a second end of the second sub connecting member is connected to the middle ring.

In a preferred embodiment, at least one of the first spring or the second spring has a conical structure.

The present disclosure provides an elastic cushion, and the elastic cushion comprises a plurality of the pre-compressed elastic modules.

In a preferred embodiment, each of the plurality of the pre-compressed elastic modules comprises a lateral connecting member, and the plurality of the pre-compressed elastic modules are connected laterally in pairs through the lateral connecting member.

In a preferred embodiment, the elastic cushion comprises a cushion, and the cushion is disposed on an upper surface of the plurality of the pre-compressed elastic modules located on an uppermost layer.

In a preferred embodiment, the elastic cushion comprises a flexible fabric cover, and the flexible fabric cover wraps the plurality of the pre-compressed elastic modules from all sides.

In a preferred embodiment, the flexible fabric cover is detachably connected to the cushion.

Compared with the existing techniques, the technical solution has the following advantages.

The elastic cushion provided by the present disclosure utilizes the pre-compressed elastic module as the support body, ensuring that the elastic cushion has appropriate stiffness upon shipment. Due to its minimal deformation under compression, the elastic cushion offers increased comfort and is therefore suitable for a wider range of users. This reduces permanent deformation of the first spring due to elastic fatigue, significantly improving the uneven collapse of the elastic cushion after long-term use, thereby extending its service life. While maintaining a same support performance as traditional elastic cushions, the elastic cushion is more compact in a longitudinal direction, saving longitudinal space on a bed.

The pre-compressed elastic module provided by the present disclosure utilizes the first flexible connecting member to pull the pre-compressed first spring at a center of the pre-compressed first spring. The pre-compressed elastic module is simple in structure, and stable in force. The conical structure of the first spring provides the pre-compressed elastic module with excellent bending resistance and lateral stability.

The pre-compressed elastic module provided by the present disclosure can be compressed to a preset length and then locked before assembly, thus saving more storage space during transportation and storage.

The pre-compressed elastic module provided by the present disclosure can be assembled detachably both horizontally and vertically. This not only simplifies a production process for manufacturers and provides ample room for product line expansion, but also allows users to flexibly assemble the pre-compressed elastic module to accommodate furniture of varying sizes, such as sofas and floor mats, making it suitable for a wider range of home scenarios.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of an upper layer and a lower layer of pre-compressed elastic modules connected together in Embodiment 1 of the present disclosure.

FIG. 2 is a partial cross-sectional view of an elastic cushion in Embodiment 1 of the present disclosure.

FIG. 3 is a partial cross-sectional view of an elastic cushion in Embodiment 2 of the present disclosure.

FIG. 4 is a plan view of a lateral connecting member in Embodiment 1 and Embodiment 2 of the present disclosure.

FIG. 5 is a front view of a pre-compressed elastic module in Embodiment 3 of the present disclosure.

FIG. 6 is a front view of the pre-compressed elastic modules assembled together in Embodiment 3 of the present disclosure.

FIG. 7 is a perspective view of the pre-compressed elastic modules in Embodiment 3 of the present disclosure.

FIG. 8 is a perspective view of an elastic cushion of Embodiment 1, Embodiment 2, and Embodiment 3 of the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings. It is obvious that the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

In the present disclosure, it should be noted that the terms “upper,” “lower,” “inner,” “outer,” “top”, “bottom,” and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present disclosure. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present disclosure. Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

In the present disclosure, it should be noted that, unless otherwise clearly stipulated and limited, the terms “installed”, “provided with”, “sleeved on”, “connected”, etc. should be understood in a broad sense. For example, “connection” can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

Embodiment 1

Referring to FIGS. 1, 2, 4, and 8, this embodiment provides an elastic cushion comprising a plurality of pre-compressed elastic modules 1-1, a first lateral connecting member 6, a soft cushion 13, and a flexible fabric cover 14. The first lateral connecting member 6, serving as a lateral connecting member of the elastic cushion, has a grid-like structure, so as to connect the plurality of pre-compressed elastic modules 1-1 laterally in pairs to form a regular working array. The soft cushion 13, disposed on an upper surface of the plurality of pre-compressed elastic modules 1-1, not only distributes local external forces from above to achieve uniform force on the plurality of pre-compressed elastic modules 1-1, but also cushions a sharp touch of a user acted upon by the plurality of pre-compressed elastic modules 1-1, thereby improving a user experience. The flexible fabric cover 14 is located below an outer periphery of the soft cushion 13 and is detachably connected to the soft cushion 13 using a zipper, snap buttons, or other means. The flexible fabric cover 14 has excellent air permeability and, utilizing its own elasticity, tightly wraps the plurality of pre-compressed elastic modules 1-1 from all sides, providing waterproof, dustproof, and aesthetically pleasing effects. Additionally, the elastic cushion further comprises a plurality of independent bags 15, which are respectively wrapped around peripheries of the plurality of pre-compressed elastic modules 1-1 to provide protection.

As shown in FIG. 1, each of the plurality of pre-compressed elastic modules 1-1 provided in this embodiment comprises a first spring 2, a first end cover 3, a second end cover 4, and a first flexible connecting member 5. The first end cover 3 and the second end cover 4 are arranged opposite to each other. The first end cover 3 comprises a first fixing portion 31 configured to fix a first end of the first spring 2, and the second end cover 4 comprises a second fixing portion 41 configured to fix a second end of the first spring 2. Therefore, a vertical distance between the first fixing portion 31 and the second fixing portion 41 defines a working length of the first spring 2. When each of the plurality of pre-compressed elastic modules 1-1 is in an initial state, the vertical distance between the first fixing portion 31 and the second fixing portion 41 is less than a free length of the first spring 2, so that the first spring 2 is in a pre-compressed state.

In the initial state, in order to maintain a fixed distance between the first end cover 3 and the second end cover 4, so as to ensure that the first spring 2 is in a stable pre-compressed state, the first flexible connecting member 5 is disposed between the first end cover 3 and the second end cover 4. A first end of the first flexible connecting member 5 is connected to the first end cover 3, and a second end of the first flexible connecting member 5 is connected to the second end cover 4. In the initial state, the first end cover 3 and the second end cover 4 tend to move apart due to a restoring force of the first spring 2, driving the first flexible connecting member 5 to be in a tensioned state. Because the first flexible connecting member 5 has a large elastic modulus in a tensile direction, only a slight deformation is required to produce a large pulling effect on the first end cover 3 and the second end cover 4, helping the first end cover 3 and the second end cover 4 to offset a supporting effect from the first spring 2, thereby maintaining a stable initial distance between the first end cover 3 and the second end cover 4.

Deformation of a spring material is nonlinearly related to magnitude of an external force that the spring material receives. This means that the more a spring is compressed, the greater a stiffness of the spring becomes, and the smaller a compression generated when subjected to a same axial pressure. Therefore, pre-compressing the plurality of pre-compressed elastic modules 1-1 can bring many benefits: (1) the elastic cushion can have appropriate stiffness when the elastic cushion leaves the factory, and the elastic cushion can produce ideal elastic deformation when the user lies down, which is particularly comfortable for people with fragile bones and circulatory systems; (2) the elastic cushion can reduce the elastic fatigue of the first spring 2, and at the same time reduce the permanent deformation of the first spring 2 caused by the elastic fatigue, greatly improving the uneven collapse of the elastic cushion after long-term use, thereby extending a service life of the elastic cushion; (3) compared with a non-pre-compressed elastic cushion, the elastic cushion has a more compact structure in a longitudinal direction while maintaining a same support performance, saving a longitudinal space of the bed; etc.

This embodiment can be locked after being compressed to a preset length, thereby saving more storage space during transportation and storage. As shown in FIG. 1, the first flexible connecting member 5 comprises a double-layered buckling ring 53 extending radially outwardly and adjacent to the first end cover 3, serving as a first position-limiting member. For ease of description, the double-layered buckling ring 53 comprises a first buckling ring 53-1 adjacent to the second end cover 4 and a second buckling ring 53-2. Correspondingly, the second end cover 4 comprises a first position-providing hole 43. The first flexible connecting member 5 passes through the first position-providing hole 43 to be configured to move axially relative to the second end cover 4. The first buckling ring 53-1 and the second buckling ring 53-2 are made of flexible material and are spaced at a distance no less than a thickness of the second end cover 4. This ensures that after the first spring 2 is compressed to a preset length due to a first external force, the first flexible connecting member 5 can be pulled by a second external force to drive the first buckling ring 53-1 through the first position-providing hole 43. Then, the second external force acting on the first flexible connecting member 5 is removed, and the first buckling ring 53-1 and the second buckling ring 53-2 are respectively buckled to two sides of the second end cover 4, so that the first buckling ring 53-1 and the second buckling ring 53-2 are interlocked with the second end cover 4 in an expansion and contraction direction of the first spring 2. When one or more of the plurality of pre-compressed elastic modules 1-1 need to be taken out for assembly, the first end cover 3 and the second end cover 4 are simultaneously pulled axially outward to release the first buckling ring 53-1 from the second end cover 4, returning one or more of the plurality of pre-compressed elastic modules 1-1 to be in the initial state.

Flexibility of the first buckling ring 53-1 and the second buckling ring 53-2 should not be too small, otherwise the first buckling ring 53-1 cannot pass through the first position-providing hole 43 due to the second external force, or needs to be subjected to a larger external force to pass through the first position-providing hole 43. The flexibility should not be too large, otherwise the first buckling ring 53-1 will be easily separated from the first position-providing hole 43 due to the restoring force of the first spring 2, and thus cannot be interlocked with the second end cover 4.

For ease of description, a side of the first end cover 3 and a side of the second end cover 4 facing the first spring 2 are defined as inner sides, and a side of the first end cover 3 and a side of the second end cover 4 facing away from the first spring 2 are defined as outer sides. As shown in FIG. 1, an end of the first flexible connecting member 5 located outside the second end cover 4 comprises a first end cap 51 to ensure that, in the initial state, the first flexible connecting member 5 can be interlocked with the second end cover 4 along a direction of the restoring force of the first spring 2. Obviously, a diameter of the first end cap 51, as well as a diameter of the first buckling ring 53-1 and a diameter of the second buckling ring 53-2, are all larger than a diameter of the first position-providing hole 43.

As shown in FIG. 1, in this embodiment, a center of the first end cover 3 comprises a second position-providing hole 33. The first flexible connecting member 5 can pass through the second position-providing hole 33 and is configured to move axially relative to the first end cover 3. Similar to the first end cap 51, an end of the first flexible connecting member 5 located outside the first end cover 3 comprises a second end cap 52, which is interlocked with the first end cover 3 in the initial state. As an alternative to a movable connection method adopted in this embodiment, the first flexible connecting member 5 and the first end cover 3 can also be fixedly connected. Neither of these two connection methods affects the normal use of the plurality of pre-compressed elastic modules 1-1.

As a simple alternative to a locking method described in this embodiment, during transportation and storage, after compressing the first spring 2 to the preset length, the first flexible connecting member 5 can be tightened, and a knot is tied in the end of the first flexible connecting member 5 located outside the second end cover 4, or a clamp is clamped on the end of the first flexible connecting member 5 located outside the second end cover 4. As long as a lateral dimension of the knot or the clamp is larger than the diameter of the first position-providing hole 43, an interlocking connection between the second end cover 4 and the knot or the clamp in the direction of the restoring force of the first spring 2 can be formed, preventing the first spring 2 from rebounding. Similarly, when one or more of the plurality of pre-compressed elastic modules 1-1 need to be taken out for assembly, loosening the knot or removing the clamp can restore the one or more of the plurality of pre-compressed elastic modules 1-1 to the initial state.

In this embodiment, the first end cover 3 and the second end cover 4 perform similar functions and are interchangeable in structure and connection. This means that for those skilled in the art, various combinations of an interlocking connection between the first flexible connecting member 5, the first end cover 3, and the second end cover 4 are possible. For example, in other embodiments, the first buckling ring 53-1 and the second buckling ring 53-2 may be located adjacent to the second end cover 4. When the first spring 2 is compressed to the preset length, the first buckling ring 53-1 and the second buckling ring 53-2 are interlocked with the first end cover 3 along an extension and contraction direction of the first spring 2. Correspondingly, in other embodiments, the first end cap 51 is located at an end of the first flexible connecting member 5 located outside the first end cover 3.

In this embodiment, the first spring 2 has a conical structure. For a conical spring, diameters of circles defined by any two adjacent length segments are different. This means that any two adjacent length segments have an inner side and an outer side, with an outer segment of any two adjacent length segments providing some lateral support to an inner segment of any two adjacent length segments. This means that any length segment of the conical spring will experience an opposing pull of an adjacent segment of the conical spring when undergoing lateral deformation. This mechanism allows the first spring 2 to absorb some lateral forces within the structure, thereby providing the plurality of pre-compressed elastic modules 1-1 with superior bending resistance and lateral stability.

In this embodiment, a support body of the elastic cushion is defined by splicing two layers defined by the plurality of pre-compressed elastic modules 1-1 assembled through a separable connection method. The connection between an upper layer 100 and a lower layer 200 of the elastic cushion will now be described with reference to the figures. As shown in FIGS. 1 and 2, considered that a space for accommodating the first end cap 51 is required, a bottom of an upper one of the plurality of pre-compressed elastic modules 1-1 on the upper layer 100 is recessed to define a female buckling member 42. A width of the female buckling member 42 gradually decreases or remains constant along a recessed direction. A top of a lower one of the plurality of pre-compressed elastic modules 1-1 on the lower layer 200 comprises a male buckling member 32 protruding outward. A longitudinal section of the male buckling member 32 is matched with the female buckling member 42, allowing the male buckling member 32 to be nested within the female buckling member 42 on the upper layer 100, so that the female buckling member 42 is fixed in position along a width direction of the female buckling member 42. This detachable connection not only simplifies a production process but also provides ample room for product line expansion. Users can flexibly assemble the plurality of pre-compressed elastic modules 1-1 to accommodate furniture of varying sizes, such as sofas and floor mats, making it suitable for a wider range of home scenarios.

Embodiment 2

As shown in FIG. 3, the elastic cushion provided in this embodiment is different from that in Embodiment 1 in that the support body of the elastic cushion comprises only one layer of the plurality of pre-compressed elastic modules 1-1.

The plurality of pre-compressed elastic modules 1-1 used in this embodiment are similar to the plurality of pre-compressed elastic modules 1-1 located on the upper layer in Embodiment 1. Since the plurality of pre-compressed elastic modules 1-1 in this embodiment do not need to be spliced between the upper layer and the lower layers the female buckling member 42 may not be provided at the bottoms of the plurality of pre-compressed elastic modules 1-1. Such non-substantial modifications are within the scope of protection of the present disclosure.

As mentioned in Embodiment 1, the first end cover 3 and the second end cover 4 are interchangeable. In the present embodiment, another connection relationship between the first flexible connecting member 5, the first end cover 3, and the second end cover 4 is illustrated. As shown in FIG. 3, the first end cap 51 is disposed outside the first end cover 3, and the second end cap 52 is disposed outside the second end cover 4. The double-layered buckling ring 53 is disposed adjacent to the second end cover 4, and the double-layered buckling ring 53 is interlocked with the first end cover 3 through the second position-providing hole 33.

Except for the differences mentioned above, other parts of the plurality of pre-compressed elastic modules 1-1 and the elastic cushion provided in this embodiment are the same as those in Embodiment 1.

Embodiment 3

Referring to FIGS. 5 to 8, the differences between the elastic cushion provided in this embodiment and that provided in Embodiment 1 is that: (1) A plurality of pre-compressed elastic modules 1-2 are double-layer structures, and a first position-limiting member is not provided on a first flexible connecting member 5; (2) based on the difference (1), a support body of the elastic cushion comprises only one layer of the pre-compressed elastic modules 1-2 connected laterally; and (3) a lateral connecting member is used as a buckling structure. Now, in conjunction with the figures, the differences (1) and (3) are further explained.

As shown in FIG. 5, each of the plurality of pre-compressed elastic modules 1-2 provided in this embodiment comprises a first spring 10, a second spring 11, a first end cover 7, a second end cover 8, a middle ring 9, and a first flexible connecting member 5. The first end cover 7 and the second end cover 8 are arranged opposite to each other and are located on two sides of a plane on which the middle ring 9 is located. The first end cover 7 comprises a first fixing portion 71 configured to fix a first end of the first spring 10. The second end cover 8 comprises a second fixing portion 81 configured to fix a first end of the second spring 11. The middle ring 9 comprises a third fixing portion 91 and a fourth fixing portion 92, which are respectively configured to fix a second end of the first spring 10 and a second end of the second spring 11. In this manner, the first spring 10 is fixed between the first end cover 7 and the middle ring 9, while the second spring 11 is fixed between the second end cover 8 and the middle ring 9. When the first spring 10 is in its initial state, a vertical distance between the first fixing portion 71 and the third fixing portion 91 is less than a free length of the first spring 10, enabling the first spring 10 to be in a pre-compressed state. Similarly, when the second spring 11 is in its initial state, a vertical distance between the second fixing portion 81 and the fourth fixing portion 92 is less than a free length of the second spring 11, so that the second spring 11 is in a pre-compressed state.

In this embodiment, in the initial state, the first flexible connecting member 5 is also used to inhibit separation movement between the first end cover 7 and the middle ring 9 and inhibit separation movement between second end cover 8 and the middle ring 9, so that the first spring 10 and the second spring 11 are in a stable pre-compressed state. In this embodiment, the first flexible connecting member 5 is a single-part structure. The first flexible connecting member 5 passes through the middle ring 9, a first end of the first flexible connecting member 5 is connected to the first end cover 7, and a second end of the first flexible connecting member 5 is connected to the second end cover 8. In other embodiments, the first flexible connecting member 5 may be a two-part structure. At this time, the first flexible connecting member 5 comprises a first sub connecting member 54 and a second sub connecting member 55. A first end of the first sub connecting member 54 is connected to the first end cover 7, and a second end of the first sub connecting member 54 is connected to the middle ring 9. A first end of the second sub connecting member 55 is connected to the second end cover 8, and a second end of the second sub connecting member 55 is connected to the middle ring 9.

In this embodiment, the first flexible connecting member 5 is not provided with the first position-limiting member. Therefore, compared with Embodiment 1, this embodiment does not further limit a connection method between the first flexible connecting member 5, the first end cover 7, and the second end cover 8. That is, the first end and the second end of the first flexible connecting member 5 can be fixedly connected to the first end cover 7 and the second end cover 8, or can be configured to move axially relative to the second end cover 8.

As shown in FIGS. 5 and 6, in this embodiment, the lateral connecting member is configured as a second lateral connecting member 12, which is the buckling structure, and the second lateral connecting member 12 comprises a plurality of first buckles 121 and a plurality of second buckles 122. The plurality of first buckles 121 are arranged on side edges of the first end cover 7 and the second end cover 8. A first group of the plurality of first buckles 121 is arranged every 90° along an outer periphery of the first end cover 7, and/or a second group of the plurality of first buckles 121 is arranged every 90° along an outer periphery of the second end cover 8. The plurality of second buckles 122 are arranged on a side edge of the middle ring 9, and positions of the plurality of second buckles 122 are aligned with the plurality of first buckles 121 in a longitudinal direction. When adjacent two of the plurality of pre-compressed elastic modules 1-2 are in lateral contact, the plurality of first buckles 121 of one of the plurality of pre-compressed elastic modules 1-2 are buckled to the plurality of first buckles 121 of another one of the plurality of pre-compressed elastic modules 1-2, and the plurality of second buckles 122 of the one of the plurality of pre-compressed elastic modules 1-2 are buckled to the plurality of second buckles 122 of the another one of the plurality of pre-compressed elastic modules 1-2, so that the plurality of pre-compressed elastic modules 1-2 can be assembled into a regular working array in a same plane.

Except for the differences mentioned above, other parts of the plurality of pre-compressed elastic modules 1-2 and the elastic cushion provided in this embodiment are the same as those in Embodiment 1.

The above is only a preferred specific embodiment of the present disclosure, but the design concept of the present disclosure is not limited to this. Any technician familiar with this technical field who uses this concept to make non-substantial changes to the present disclosure within the technical scope disclosed by the present disclosure shall be deemed to infringe the scope of protection of the present disclosure.