Elastic module and modular elastic mattress

Abstract

An elastic module, comprising a plurality of spring units (1). The plurality of spring units (1) are assembled with each other to form the elastic module. Each spring unit (1) comprises a first spring (11) and a second spring (12), wherein the first spring (11) can be compressed axially to a locked position, the upper end of the first spring (11) is provided with an end cover (113), the bottom of the second spring (12) is provided with a bottom cover (121), and the second spring (12) is detachably mounted on the end cover (113) to form the spring unit (1). A modular elastic mattress comprises the elastic module.

Description

An elastic module and an elastic pad

[0001] Cross-references to related applications

[0002] This application claims priority to and is based on Chinese Patent Application No. 202410501946X, filed on April 25, 2024, with the invention entitled "An Elastic Module and Elastic Pad", the contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to the field of furniture, and more particularly to an elastic module and an elastic pad. Background Technology

[0004] Mattresses and other furniture are characterized by their large size and difficulty in moving. Most existing mattresses are not designed for disassembly, or are difficult to reassemble once disassembled. However, with the development of modern life, mattresses and other furniture are facing increasingly frequent assembly and disassembly to adapt to the needs of population migration and outdoor recreation.

[0005] Currently, some detachable mattresses have been developed, where each spring unit is independent and can be disassembled and assembled with each other. However, a mattress uses a large number of independent spring units, and even after they are disassembled, they require a lot of space during transportation and are difficult to move quickly by hand.

[0006] Therefore, the spring unit needs to be redesigned to reduce its space requirements during transportation and facilitate manual handling.

[0007] At the same time, different users have different needs for mattress firmness. Some users like soft mattresses, while others prefer soft mattresses. If they want to change to springs with different firmness, they need to disassemble all the components of the entire independent spring unit and reinstall springs with different firmness, which is very inconvenient and easy to damage. Summary of the Invention

[0008] This invention provides an elastic module and elastic pad that can reduce space occupation during disassembly and transportation, facilitate manual handling, and allow users to replace springs of different softness and hardness without disassembling the spring unit.

[0009] To solve the above-mentioned technical problems, the present invention provides an elastic module, including multiple spring units, which are spliced ​​together to form the elastic module. The spring unit includes a first spring and a second spring. The first spring is compressible to a locked position along the axial direction. The upper end of the first spring is provided with an end cap, and the bottom of the second spring is provided with a bottom cap. The second spring is detachably mounted on the end cap to form the spring unit.

[0010] In a preferred embodiment: the bottom cover of the second spring is screwed, plugged, or threadedly connected to the end cover.

[0011] In a preferred embodiment: the bottom cover of the second spring is symmetrically provided with two screw-on parts, each screw-on part comprising a first part and a second part, the first part extending axially from the bottom of the base, and the second part located at the end of the first part and extending radially outward from the center.

[0012] In a preferred embodiment: the top of the end cap is provided with a slide rail corresponding to each of the screw-on components as an installation structure. The slide rail is a strip-shaped recessed hole. The width of the strip-shaped recessed hole gradually narrows along the rotation direction of the screw-on component. The narrowest width of the strip-shaped recessed hole is less than the width of the second part.

[0013] In a preferred embodiment, the bottom of the bottom cover of the second spring is provided with a connector.

[0014] In a preferred embodiment: the top of the end cap is provided with a plug slot corresponding to the plug.

[0015] In a preferred embodiment: the bottom of the bottom cover is provided with a conical plug with a gradually decreasing radius along the insertion direction, and the top of the end cover is provided with a plug groove corresponding to the conical plug. The conical plug is inserted into the plug groove so that the conical plug self-locks along the vertical direction.

[0016] In a preferred embodiment: the bottom of the bottom cover is symmetrically provided with two tapered connectors with gradually decreasing widths along the insertion direction, and a tapered groove is formed in the middle of the two tapered connectors; the top of the end cover is provided with tapered insertion slots on both sides that cooperate with the tapered connectors, and a tapered protrusion is formed in the middle of the tapered insertion slots on both sides. The tapered connector is inserted into the tapered insertion slot, and the double-conical structure formed by the tapered connector and the tapered protrusion self-locks in the vertical direction.

[0017] In a preferred embodiment: the end cap is provided with a threaded connector, and the thread is provided on the outer wall of the threaded connector; the bottom cover is a ring, and the inner wall of the ring is provided with a thread, and the bottom cover of the second spring is threadedly connected to the threaded connector.

[0018] In a preferred embodiment, the elastic elements are arranged in a hexagonal staggered pattern.

[0019] The present invention also provides an elastic module, comprising multiple spring units, wherein the multiple spring units are spliced ​​together to form the elastic module, characterized in that the spring unit includes a first spring and a second spring, the first spring being compressible to a locked position along the axial direction; the top of the first spring includes an end cap, the bottom of the second spring includes a bottom cap, and a connecting plate is also included, wherein the end cap and the bottom cap are mounted on both sides of the connecting plate to form the elastic module.

[0020] In a preferred embodiment: a first plug-in structure is provided below the connecting plate to plug into the end cap of the first spring; a second plug-in structure is provided above the connecting plate to plug into the bottom cap of the second spring.

[0021] In a preferred embodiment: the first springs are arranged in a matrix or in a staggered hexagonal arrangement along the transverse and longitudinal directions. The second springs are arranged in a matrix or in a staggered hexagonal arrangement along the transverse and longitudinal directions.

[0022] In a preferred embodiment: the upper and lower sides of the connecting plate are respectively formed with circular protrusions along the vertical direction, and the bottom cover and the end cover are provided with concave holes that are interference fit with the circular protrusions.

[0023] In a preferred embodiment: the upper and lower sides of the connecting plate respectively form annular slots along the vertical direction, and the annular slots are provided with tapered plugs that are plugged into the bottom cover or end cover and self-locked along the axial direction.

[0024] The present invention also provides an elastic module comprising a plurality of spring units, wherein each spring unit includes a first spring and a second spring, the first spring being compressible to a locked position along the axial direction; the upper end of the first spring is provided with an end cap, and the second spring is detachably mounted on the end cap; the plurality of spring units are arranged in a matrix along the transverse and longitudinal directions such that gaps are formed between adjacent rows or columns, and a third spring is inserted between some or all of the gaps to form the elastic module.

[0025] In a preferred embodiment: the second spring is an inverted cone shape, and the third spring is a regular cone shape.

[0026] In a preferred embodiment: the second spring and the third spring are cylindrical in shape and size.

[0027] The present invention also provides an elastic module, including multiple spring units, which are spliced ​​together to form the elastic module. Each spring unit includes a first spring and at least two second springs. The first spring is compressible to a locked position along the axial direction. An end cap is provided at the upper end of the first spring, and the at least two second springs are detachably mounted on the end cap to form the spring unit.

[0028] In a preferred embodiment: the end cap is provided with at least two mounting structures, and the at least two second springs are inserted into or screwed onto the end cap through the second mounting structures.

[0029] In a preferred embodiment, the second spring is axially compressible to a locked position.

[0030] In a preferred embodiment: the second spring is a cavity structure, and multiple second springs can be stacked along the axial direction.

[0031] In a preferred embodiment: a flexible spring top cover is provided above the second spring, and the flexible spring top cover is inserted into the cavity structure.

[0032] In a preferred embodiment: the other end of the first spring is provided with a base, the end cap is provided with a first engaging structure at the lower end along the spring compression direction, and the base is provided with a second engaging structure at the upper end along the spring compression direction. In the locked position, the first engaging structure and the second engaging structure are engaged.

[0033] In a preferred embodiment: two hooks are symmetrically arranged on the lower end face of the end cap along the compression direction as a first engaging structure. The hooks include a connecting part and a hook part, and the hook part is disposed on the outside of the connecting part.

[0034] In a preferred embodiment: both sides of the base extend toward the center of the base to form a snap-fit ​​member as a second snap-fit ​​structure. The snap-fit ​​member includes a connecting arm and a snap-fit ​​part. The snap-fit ​​part is located at the end of the connecting arm. The snap-fit ​​part is suspended so that the snap-fit ​​member has the elasticity to be pushed by the snap hook. When the first spring is in the locked position, the snap hook part and the snap-fit ​​part are axially limited to achieve a snap-fit.

[0035] In a preferred embodiment: the distance between the latching portion and the central axis of the first spring gradually decreases along the spring compression direction, so that the latching portion forms an inclined surface. Under the action of external force, the hook portion slides down along the inclined surface to lock the bottom end of the latching portion, so that the hook and the latching member are axially limited and engaged.

[0036] In a preferred embodiment: under the action of external force, the hook portion pushes against the locking portion elastically until the hook portion disengages from the locking portion and the fastening is released.

[0037] In a preferred embodiment: a pusher is provided on the lower end face of the end cap along the compression direction, and elastic limiting members are provided on both sides of the pusher as a first engaging structure.

[0038] In a preferred embodiment: the upper surface of the base is provided with a limiting groove that cooperates with the elastic limiting member as a second engaging structure, and a limiting wall is formed on one side of the limiting groove. Under the action of external force, the pushing member pushes the elastic limiting member to slide into the limiting groove until it is locked by the limiting wall to achieve engagement.

[0039] In a preferred embodiment: the first spring includes a spring and a cloth sleeve, the cloth sleeve being wrapped around the outer surface of the spring; a collar is provided on the outer side of the cloth sleeve at the top of the spring, the lower surface of the collar being slotted inward along the vertical direction to form a ring groove, and the bottom surface of the end cap is provided with a locking structure, the locking structure being engaged with the ring groove and the collar being limited.

[0040] In a preferred embodiment: the collar includes a first part and a second part, the second part is disposed on the inner side of the fabric cover, the first part is disposed on the outer side of the fabric cover, and the first part and the second part are fastened and fixed to the spring.

[0041] In a preferred embodiment: the first spring includes a spring and a cloth sleeve, the cloth sleeve being included on the outer surface of the spring; a collar is provided on the outer side of the bottom cloth sleeve of the spring, and a protrusion is provided on the outer side of the collar; the base forms a U-shaped groove along the radial outer side, and a locking structure is formed on the top of the outer wall of the U-shaped groove, the collar is locked into the U-shaped groove, and the U-shaped groove and the collar are axially limited and matched.

[0042] In a preferred embodiment: the spring in the second spring is removable.

[0043] The present invention also provides an elastic pad, comprising the elastic module as described above.

[0044] Compared with the prior art, the beneficial effects of this invention are that each spring unit of the elastic module of this invention can be separated into a first spring and a second spring. The first spring and the second spring are detachable and can be installed separately. The first spring can also be compressed axially to the locking position, which can save space occupied during transportation and facilitate manual handling. The second spring, which is in contact with the human body, is easy to replace. Different soft and hard second springs can be replaced without disassembling the spring unit to meet different user needs. Attached Figure Description

[0045] Figure 1 is a schematic diagram of the spring unit in Embodiment 1;

[0046] Figure 2 is a schematic diagram of the first spring in Embodiment 1;

[0047] Figure 3 is a schematic diagram of the first spring compression state in Example 1;

[0048] Figure 4 is a schematic diagram of the second spring with a conical connector in Embodiment 1;

[0049] Figure 5 is a schematic diagram of the second spring with a screw connector in Embodiment 1;

[0050] Figure 6 is a schematic diagram of the second spring stacking state in Figure 4;

[0051] Figure 7 is a schematic diagram of the second spring stacking in Figure 5;

[0052] Figure 8 is a schematic diagram of the second springs of various shapes that can be nested together;

[0053] Figure 9 is a schematic diagram of a second spring with different stiffness;

[0054] Figure 10 is a schematic diagram of the compressible second spring;

[0055] Figure 11 is a schematic diagram of the first spring assembly in Embodiment 1;

[0056] Figure 12 is a schematic diagram of the second spring installed on the first spring in Embodiment 1;

[0057] Figure 13 is a schematic diagram of a local elastic module formed by the first spring and the second spring in Embodiment 1;

[0058] Figure 14 is a schematic diagram of the elastic module in Example 1;

[0059] Figure 15 is a schematic diagram of the elastic pad in Example 1;

[0060] Figure 16-18 is a schematic diagram of the splicing method of first installing the second spring and then assembling it as shown in Figure 14;

[0061] Figure 19-22 is a schematic diagram of the splicing method of first assembling the first spring and then installing the second spring;

[0062] Figure 23 is a schematic diagram of the spring unit in Embodiment 2;

[0063] Figure 24 is a schematic diagram of the spring unit in the disassembled state in Embodiment 2;

[0064] Figure 25 is a cross-sectional view of the first spring in the compressed state of Embodiment 2;

[0065] Figure 26 is a cross-sectional view of the first spring in Embodiment 2;

[0066] Figure 27 is a schematic diagram of the first spring in Embodiment 3;

[0067] Figure 28 is a schematic diagram of the first spring compression state in Example 3;

[0068] Figure 29 is a cross-sectional view of the first spring in the compressed state of Example 3;

[0069] Figure 30 is a schematic diagram of the second spring in Embodiment 3;

[0070] Figure 31 is a cross-sectional view of the second spring in Embodiment 3;

[0071] Figure 32 is a schematic diagram of the first spring after splicing and compression in Example 3;

[0072] Figure 33 is a schematic diagram of the first spring after splicing and release in Example 3;

[0073] Figure 34 is a schematic diagram of the second spring installed on the first spring in Embodiment 3;

[0074] Figure 35 is a schematic diagram of the elastic module in Example 3;

[0075] Figure 36 is a schematic diagram of the first spring compression state in Example 4;

[0076] Figure 37 is a schematic diagram of the first spring release state in Example 4;

[0077] Figure 38 is a schematic diagram of the second spring installed on the connecting plate in Embodiment 4;

[0078] Figure 39 is a schematic diagram of the splicing of the elastic module in Example 4;

[0079] Figure 40 is a schematic diagram of the elastic module in Example 5;

[0080] Figure 41 is a top view of the elastic module in Embodiment 5;

[0081] Figure 42 is a bottom view of the elastic module in Embodiment 5;

[0082] Figure 43 is a side view of the long side of the elastic module in Embodiment 5;

[0083] Figure 44 is a short side view of the elastic module in Embodiment 5;

[0084] Figure 45 is a schematic diagram of a partial elastic module disassembled in Example 5;

[0085] Figure 46 is a bottom view of a portion of the elastic module disassembled in Example 5;

[0086] Figure 47 is a top view of a portion of the elastic module disassembled in Example 5;

[0087] Figure 48 is a cross-sectional view of a set of spring units in disassembled state in Embodiment 6;

[0088] Figure 49 is a top view of a set of spring units assembled in Embodiment 6;

[0089] Figure 50 is a cross-sectional view of the spliced ​​elastic module in Example 6;

[0090] Figure 51 is a schematic diagram of the installation position of the third spring in Embodiment 6;

[0091] Figure 52 is a cross-sectional view of a set of spring units assembled in Example 6;

[0092] Figure 53 is a top view of the elastic module in Embodiment 6;

[0093] Figure 54 is an exploded view of the elastic unit of Example 7;

[0094] Figure 55 is a schematic diagram of the elastic module in Example 7;

[0095] Figures 56-60 are schematic diagrams showing the connection of the spring unit in the elastic module in Example 8;

[0096] Figure 61 is a schematic diagram of the distribution of the first spring in Example 9;

[0097] Figure 62 is a schematic diagram of the distribution of the second spring in Example 9;

[0098] Figure 63 is a cross-sectional view of the connection relationship between the second spring and the third spring in Example 10;

[0099] Figure 64 is a top view of the connection relationship between the second spring and the third spring in Embodiment 10;

[0100] Figure 65 is a schematic diagram of the lower elastic layer of the first spring splicing in Embodiment 10;

[0101] Figure 66 is a top view of the lower elastic layer of the first spring splicing in Embodiment 10;

[0102] Figure 67 is a schematic diagram of the elastic module in Example 10;

[0103] Figure 68 is a top view of the elastic module in Example 10. Detailed Implementation

[0104] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0105] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0106] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped", "sleeved / connected", "connected", etc., should be interpreted broadly. 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 a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0107] Example 1

[0108] Referring to Figures 1-22, this embodiment provides an elastic module including multiple spring units 1. Each spring unit 1 includes a first spring 11 and a second spring 12. The first spring 11 can be compressed axially to a locked position under the action of an external force.

[0109] Specifically, the first spring 11 includes a spring 111, a cloth sleeve 112, an end cap 113, and a base. The outer side of the spring 111 is wrapped with the cloth sleeve 112. The end cap 113 is installed on the top of the spring 111, and the base is located at the bottom of the spring. The cloth sleeve 112 is connected between the end cap 113 and the base 115, thus wrapping the outer side of the spring with the cloth sleeve to form a cloth-covered spring. The side of the end cap 113 is provided with a connecting structure 114, and adjacent first springs 11 are spliced ​​together through the connecting structure 114. The second spring 12 includes a bottom cover 121. The bottom cover 121 of the second spring 12 is detachably connected to the end cap 113 through the mounting structure on the end cap 113, thereby installing the second spring 12 on the first spring 11 to form the spring unit 1. The spring unit 1 is spliced ​​together through the connecting structure 114 around the first spring 11 to form the elastic module.

[0110] During the assembly process, the first spring 11 can be released and then assembled together to form a lower elastic layer. Then, the second spring 12 can be installed on the first spring 11 to form an upper elastic layer. The upper and lower elastic layers together form the elastic module. Alternatively, the second spring 12 can be installed on the first spring 11 and then assembled through the connecting structure 114 on the first spring 11. The assembled elastic module can also be divided into an upper elastic layer formed by the first spring 11 and a lower elastic layer formed by the second spring 12. Alternatively, the first spring 11 can be assembled together in a compressed state to form a compressed lower elastic layer. Then, the lower elastic layer can be released and the second spring 12 can be installed to form the elastic module.

[0111] In this embodiment, the bottom cover 121 of the second spring 12 and the end cover 113 of the first spring 11 are screwed together: the bottom cover 121 of the second spring 12 is symmetrically provided with two screw-connecting parts 122, each screw-connecting part 122 including a first part 1221 and a second part 1222. The first part 1221 extends axially from the bottom of the base, and the second part 1222 is located at the end of the first part 1221 and extends radially outward from the center; the top of the end cover 113 is provided with a slide rail 1131 corresponding to each screw-connecting part 122 as an installation structure. The slide rail 1131 is a strip-shaped concave hole, and the width of the strip-shaped concave hole gradually narrows along the rotation direction of the screw-connecting part 122. The narrowest width of the strip-shaped concave hole is less than the width of the second part 1222.

[0112] Insert the screw connector 122 of the second spring 12 into the strip-shaped recess and then rotate the second spring 12 until the second portion 1222 of the screw connector 122 reaches the narrowest point of the strip-shaped recess. Since the width of the narrowest point of the strip-shaped recess is less than the width of the second portion 1222, the second portion 1222 of the screw connector 122 and the strip-shaped recess are axially locked together, thereby mounting the second spring 12 above the first spring 11. When disassembly is required, rotate the second spring 12 until the second portion 1222 of the screw connector 122 reaches the widest point of the strip-shaped recess, allowing the screw connector 122 to be removed from the widest point.

[0113] As a simple alternative to this embodiment, as shown in Figures 3 and 4: the bottom cover 121 of the second spring 12 and the end cover 113 of the first spring 11 are inserted together. The bottom of the bottom cover 121 has a tapered conical connector 123 with a gradually decreasing radius along the insertion direction. The top of the end cover 113 has a corresponding insertion groove 1132. The conical connector 123 is inserted into the insertion groove 1132, causing it to self-lock in the vertical direction. The conical connector 123 of the second spring 12 is inserted into the insertion hole 1132 above the end cover 113 of the first spring 11. The conical connector 123 self-locks in the insertion groove 1132, thus mounting the second spring 12 above the first spring 11. When disassembly is required, the conical connector 123 of the second spring 12 can be pulled out from the insertion groove 1132 above the end cover 113 of the first spring 11 using external force.

[0114] To facilitate the storage of the second spring 12, the second spring 12 can be compressed axially to a locked position under external force. The locking method of the first spring 11 and the second spring 12 in the compressed state is not limited. As long as the purpose of this embodiment can be achieved, engaging structures can be installed at both the upper and lower ends of the first spring 11, and the locking can be achieved through the limiting cooperation between the engaging structures. Alternatively, any method from the prior art can be used.

[0115] When the elastic module needs to be disassembled for storage or transportation, the multiple spring units 1 that make up the elastic module are first disassembled. Then, the first spring 11 and the second spring 12 of the spring unit 1 are disassembled in the manner described above. The first spring 11 and the second spring 12 are compressed to a locked state by external force. The space occupied by the first spring 11 and the second spring 12 when compressed to the locked state is significantly reduced compared to when they are not compressed. In this embodiment of the elastic module, compared with the traditional elastic module, each spring unit 1 can be disassembled independently. At the same time, each spring unit 1 can also be disassembled into the first spring 11 and the second spring 12. Both the first spring 11 and the second spring 12 can be compressed to a locked state. Therefore, when handling, transporting, or storing, the spring unit 1 is split into the first spring 11 and the second spring 12 in the smallest compressed state, which can reduce the space occupied, facilitate manual handling, and increase the number of spring units 1 that can be handled at one time, thereby improving transportation efficiency.

[0116] When it is necessary to assemble an elastic module, simply release the first spring 11 and the second spring 12, then assemble the first spring 11 into a lower elastic layer using the aforementioned connecting structure 114, and then install the second spring 12 one by one onto the first spring 11 to form an upper elastic layer. The upper and lower elastic layers together form the elastic module. Alternatively, after releasing the first spring 11 and the second spring 12, directly assemble the first spring 11 and the second spring 12 into a single spring unit 1, and then assemble each spring unit 1 into the elastic module using the connecting structure 114.

[0117] As a simple alternative to this embodiment, the second spring 12 has a hollow structure, and multiple second springs 12 can be stacked along the axial direction. Therefore, when the elastic module is disassembled to the first spring 11 and the second spring 12, the first spring 11 is compressed to a locked state, and then the second spring 12 is stacked along the axial direction, which can also reduce the space occupied.

[0118] In order to meet the needs of different users for elastic pads with different softness and hardness, the spring in the second spring 12 that forms the upper elastic layer is detachable, so that it can be replaced with springs with different softness and hardness according to the user's needs.

[0119] In this embodiment, an elastic pad can be formed by laying a pad layer 4 on top of the upper elastic layer of the elastic module.

[0120] Example 2

[0121] Referring to Figures 23-26, this embodiment provides an elastic module including multiple spring units 1. Each spring unit 1 includes a first spring 11 and a second spring 12. The first spring 11 is compressible to a locked position along the axial direction.

[0122] Specifically, the first spring 11 includes a spring 111, a cloth sleeve 112, and an end cap 113. The cloth sleeve 112 is wrapped around the outside of the spring 111. The end cap 113 is installed on the top of the spring 111 and the outside of the cloth sleeve 112 to fix the cloth sleeve 112, thereby forming a pocket spring. A connecting structure 114 is provided around the side of the end cap 113, and adjacent first springs 11 are spliced ​​together through the connecting structure 114. The second spring 12 includes a bottom cover 121. The bottom cover 121 of the second spring 12 is detachably connected to the end cap 113 through the mounting structure on the end cap 113, thereby installing the second spring 12 on the first spring 11 to form the spring unit 1. The spring unit 1 is spliced ​​together through the connecting structure 114 around the first spring 11 to form the elastic module.

[0123] In this embodiment, the bottom cover 121 of the second spring 12 and the end cover 113 of the first spring 11 are inserted together: the bottom of the bottom cover 121 is symmetrically provided with two tapered inserts 124 with gradually narrowing widths, and a tapered groove 125 is formed in the middle of the two tapered inserts 124; the top of the end cover is provided with tapered insertion slots 1133 on both sides that cooperate with the tapered inserts 124, and a tapered protrusion 1137 is formed in the middle of the tapered insertion slots 1133 on both sides. The tapered inserts 124 are inserted into the tapered insertion slots 1133, and the double-conical structure formed by the tapered inserts 124 and the tapered protrusions 1137 is self-locking in all directions except the vertical direction. The tapered insert of the second spring 12 is inserted into the tapered insertion slot 1133 of the first spring 11, thereby mounting the second spring 12 on the first spring 11.

[0124] In this embodiment, the other end of the first spring 11 is also provided with a base 115. Two hooks 1134 are symmetrically arranged on the lower end face of the end cap 113 along the compression direction as a first engaging structure. Each hook 1134 includes a connecting portion 11341 and a hook portion 11342, with the hook portion 11342 located outside the connecting portion 11341. Both sides of the base 115 extend toward the center of the base 115 to form a locking member 1151 as a second engaging structure. Each locking member 1151 includes a connecting arm 11511 and a locking portion 11512, with the locking portion 11512 located at the end of the connecting arm 11511. The suspended engagement portion 11512 allows the engagement member 1151 to be pushed by the hook 1134 with elasticity. The engagement portion 11512 gradually approaches the central axis of the first spring 11 along the compression direction of the spring 111, forming an inclined surface. Under the action of external force, the hook portion 11342 slides down the inclined surface to lock the bottom end of the engagement portion 11512, so that the hook 1134 and the engagement member 1151 are axially limited and cooperate to lock the first spring 11. When the first spring 11 is in the locked position, the hook portion 11342 and the engagement portion 11512 are axially engaged.

[0125] Pressing the end cap 113 against the base 115 compresses the first spring 11 axially. The hook portion 11342 slides down the inclined surface of the base 115 to lock the bottom end of the latching portion 11512, thus locking the first spring 11 by axially engaging the hook 1134 with the latching member 1151. When it is necessary to release the first spring 11, the end cap 113 is pressed further against the base 115, the hook portion 11342 pushes past the latching portion 11512, and then the end cap 113 is quickly released. At this time, the elasticity of the hook portion 11342 has not yet recovered before it disengages from the bottom of the latching portion 11511, releasing the engagement. The first spring 11 will be released under the restoring force of the internal spring 111. The locking and releasing method of the compressed state of the first spring 11 in this embodiment can be applied to the above embodiment and can also be applied to the second spring 12.

[0126] In this embodiment, the end cap 113 and the base 115 of the first spring 11 are detachably mounted on the spring 111. Specifically, a collar 1121 is provided on the outer side of the cloth sleeve 112 at the top of the spring 111. The lower surface of the collar 1121 is grooved inward along the vertical direction to form an annular groove. The bottom end of the end cap 113 is provided with a locking structure, which engages with the annular groove and limits the collar 1121. The collar 1121 includes a first part 1221 and a second part 1222. The second part 1222 is located inside the cloth sleeve 112, and the first part 1221 is located outside the cloth sleeve 112. The first part 1221 and the second part 1222 are fastened and fixed to the cloth sleeve 112. The collar 1121 fixes the cloth sleeve 112 wrapped around the outside of the spring 111 on one hand, and limits the end cap 113 by engaging with the end cap 113 to install the end cap 113 on the top of the first spring 11 on the other hand.

[0127] Similarly, a collar 1121 is also provided on the outer side of the bottom fabric sleeve 112 of the spring 111, and a protrusion 1122 is provided on the outer side of the collar 1121; the base 115 forms a U-shaped groove 1151 along the radial outer side, and a locking structure is formed on the top of the outer wall of the U-shaped groove 1151, into which the collar 1121 is engaged, and the U-shaped groove 1151 and the collar 1121 are axially limited and fitted. The collar 1121 also includes a first part 11211 and a second part 11212, the second part 11212 is provided on the inner side of the fabric sleeve 112, and the first part 11211 is provided on the outer side of the fabric sleeve 112, and the first part 11211 and the second part 11212 are fastened and fixed to the fabric sleeve 112.

[0128] Everything else is the same as in Example 1, and will not be repeated here.

[0129] Example 3

[0130] Referring to Figures 27-35, this embodiment provides an elastic module including multiple spring units 1. Each spring unit 1 includes a first spring 11 and a second spring 12. The first spring 11 is compressible to a locked position along the axial direction.

[0131] Specifically, the first spring 11 includes a spring 111, a cloth sleeve 112, and an end cap 113. The outer side of the spring 111 is wrapped with the cloth sleeve 112. The end cap 113 is installed on the top of the spring 111, the base is located at the bottom of the spring, and the cloth sleeve 112 is connected between the end cap 113 and the base 115. The spring is fixed in the cavity formed by the end cap, the base, and the cloth sleeve to form a cloth sleeve spring. The side of the end cap 113 is provided with a connecting structure 114, and adjacent first springs 11 are spliced ​​together through the connecting structure 114. The second spring 12 includes a bottom cover 121. The bottom cover 121 of the second spring 12 is detachably connected to the end cap 113 through the mounting structure on the end cap 113, thereby installing the second spring 12 on the first spring 11 to form the spring unit 1. The spring unit 1 is spliced ​​together through the connecting structure 114 around the first spring 11 to form the elastic module.

[0132] In this embodiment, the bottom cover 121 of the second spring 12 and the end cover 113 of the first spring 11 are threadedly connected: the end cover 113 is provided with a threaded connector, and the thread is provided on the outer wall of the threaded connector; the bottom cover 121 is a ring, and the inner wall of the ring is threaded, and the bottom cover 121 of the second spring 12 is threadedly connected to the threaded connector. The threaded connector of the end cover 113 is fitted into the ring of the bottom cover 121, and then rotated. The thread on the inner wall of the ring and the thread on the outer wall of the threaded connector engage, and after tightening, the second spring 12 is mounted on the first spring 11.

[0133] In this embodiment, a pusher 1135 is provided on the lower end face of the end cap 113 along the compression direction. Elastic limiting members 1136 are provided on both sides of the pusher 1135 as a first engaging structure. A limiting groove 1152, which mates with the elastic limiting member 1136, is provided on the upper end face of the base 115 as a second engaging structure. A limiting hook 1153 is provided on one side of the limiting groove 1152. Under external force, the pusher 1135 pushes the elastic limiting member 1136 into the limiting groove 1152 until the elastic limiting member 1136 engages with the limiting hook 1153. The rest is the same as in Embodiment 1 and will not be described again.

[0134] Example 4

[0135] Referring to Figures 36-39, this embodiment also provides an elastic module, including multiple spring units 1, wherein the spring unit 1 includes a first spring 11 and a second spring 12;

[0136] The top of the first spring 11 includes an end cap 113, and a connecting structure 114 is provided around the end cap 113 to splice adjacent first springs 11 together. The first spring 11 can be compressed to a locked position along the axial direction. The bottom of the second spring 12 includes a bottom cap 121 and a connecting plate 2. The upper and lower sides of the connecting plate 2 are respectively formed with circular protruding rings 21 along the vertical direction as a first insertion structure and a second insertion structure. The circular protruding rings 21 are arranged in an array on the connecting plate 2. The upper end face of the end cap 113 of the first spring 11 and the lower end face of the bottom cap 121 of the second spring 12 are provided with recessed holes that are interference fit with the circular protruding rings 21. The circular protruding rings 21 have a certain interference with the recessed holes of the end cap 113 and the bottom cap 121.

[0137] When assembling the elastic module, the circular protrusions 21 of the connecting plate 2 are respectively inserted into the recesses of the first spring 11 and the second spring 12, thereby assembling the first spring 11 and the second spring 12 into spring unit 1. The spring unit 1 is then assembled into the elastic module through the connecting structure 114 around the first spring 11. The first spring 11 forms a lower elastic layer on the lower layer of the connecting plate 2, and the second spring 12 forms an upper elastic layer on the upper layer of the connecting plate 2. A pad is then laid on the upper elastic layer to form an elastic pad. The rest is the same as in Embodiment 1, and will not be repeated here.

[0138] Example 5

[0139] Referring to Figures 40-47, this embodiment provides an elastic module, including multiple spring units 1. The multiple spring units 1 are spliced ​​together to form the elastic module. Each spring unit 1 includes a first spring 11 and four second springs 12. The first spring 11, as in Embodiment 2, can be compressed axially to a locking position where the upper cover and the base are engaged. The upper end of the first spring 11 is provided with an end cap 113. The four second springs 12 are detachably mounted on the end cap 113 to form the spring unit 1.

[0140] The difference between this embodiment and embodiment 4 is that the second spring 12 includes four springs. The diameter of the second spring 12 is smaller than that of the first spring 11. The first spring 11 and the second spring 12 are connected by a connecting plate 2. The connection structure of the upper and lower surfaces of the connecting plate 2 is different, so that four second springs 12 correspond to the cross-section of the first spring 11. Therefore, four second springs 12 can be installed on the upper end of one first spring 11, thereby increasing the number of springs 111 in the upper elastic layer, making the elastic pad using the elastic module of this embodiment more comfortable. Taking a 1m*2m elastic pad as an example, the number of second springs 12 in the upper elastic layer can be increased by more than 300%. The number of second springs 12 can be improved according to the user's needs and is not limited to the four in this embodiment. The rest is the same as in embodiment 4, and will not be repeated here.

[0141] Example 6

[0142] Referring to Figures 48-53, this embodiment provides an elastic module including multiple spring units 1. Each spring unit 1 includes a first spring 11 and a second spring 12. The first spring 11 is compressible to a locked position along the axial direction, as in Embodiment 2. The upper end of the first spring 11 is provided with an end cap 113, and the second spring 12 is detachably mounted on the end cap 113. The multiple spring units 1 are arranged in a horizontal and vertical array such that gaps are formed between the four spring units 1. A third spring 13 is inserted between the gaps formed by the second spring 12 to form the elastic module.

[0143] The difference between this embodiment and Embodiment 1 is that a third spring 13 is inserted into the upper elastic layer formed by the second spring 12. Since the second spring 12 is inverted conical, when the second springs 12 are arranged in a horizontal and vertical array, there is still space in the middle of the area enclosed by the four second springs 12 to insert a conical spring. Therefore, inserting a conical third spring 13 into this space to increase the number of support points in the upper elastic layer makes the elastic pad using the elastic module of this embodiment more comfortable. Taking a 1-meter by 2-meter elastic pad as an example, the total number of second springs 12 and third springs 13 in the upper elastic layer can increase by more than 80% compared to Embodiment 1. The rest is the same as Embodiments 1 and 2 and will not be repeated.

[0144] Example 7

[0145] Referring to Figures 54-55, the second spring 12 has a hollow structure. The contact surface between the user and the second spring 12 is only a small and relatively hard annular area. A very thick padding layer is required to improve the comfort of the elastic pad and make the user unaware of the annular shape. When the padding layer is too thin, the elastic pad will be very uncomfortable.

[0146] Therefore, in order to improve the elastic feel and comfort of the elastic pad, in this embodiment, a flexible spring top cover 14 is provided above the second spring 12. The flexible spring top cover 14 is inserted into the cavity structure of the second spring, which can increase the contact area of ​​the elastic pad. At the same time, the spring 111 inside the flexible spring top cover 14 has high elasticity and the upper end is flexible, which can improve the elastic feel and comfort.

[0147] Example 8

[0148] The difference between this embodiment and embodiment 1 is that the connection structure 114 in embodiment 1 is symmetrically arranged around the end cap 113, so that the spring units 1 are connected to each other in the horizontal and vertical directions, and the spring units 1 are arranged in a matrix.

[0149] In this embodiment, the spring units 1 in two adjacent rows are staggered to form a hexagonal distribution, which increases the number of springs per unit area and reduces the spring gaps in the quadrilateral layout. This can increase the number of springs by more than 15%, greatly improving the comfort of the elastic pad.

[0150] To achieve this staggered arrangement, the connection structure 114 is configured differently from that in Embodiment 1, specifically in the following ways:

[0151] 1. As shown in Figure 56, there are two connecting structures 114 on each of the four sides for connecting the longitudinal spring unit 1, and the two connecting structures 114 are arranged in an equilateral triangle, that is, six connecting structures are evenly arranged on a spring, and one spring unit 1 can be connected to six spring units.

[0152] 2. As shown in Figure 57, the first springs in spring unit 1 are connected in a row, and the springs in adjacent rows are staggered. Each row of first springs includes five first springs 11. The first springs 11 in each row are connected by a connecting plate 2. The connecting plate 2 has a connecting structure 1142 on both sides of the length direction of a row of springs, a connecting structure 1142 at the 12 o'clock direction of each spring in the width direction, and a side connecting structure 1141 at the 4.5 o'clock direction. The spring units 1 in two adjacent rows can be staggered and form a hexagonal distribution by connecting the first part 1141 and the second part 1142. 3. Figures 58 and 59 show the spring unit arrangement in Figure 57. Similar to Figure 57, the spring units 1 or the first spring are arranged in a row. Each row of first springs 11 is connected by a connecting frame 2. The connecting frame connects the first springs in a row. The connecting frames of adjacent rows are of two types, as shown in Figure 60. The first connecting frame 21 connects 5 springs in a row. In the width direction, each spring unit or first spring has a first part 1141 of the connecting structure at the 12 o'clock and 6 o'clock positions, which is a socket. In the length direction, the first part and the second part of the connecting structure, which are sockets and plugs, are respectively provided on both sides. The second connecting frame 22 of the adjacent row also connects five spring units or first springs. In the 12 o'clock and 6 o'clock positions between two spring units, the second part 1142 of the connecting structure, which is a plug, is provided. The first part 1141 of the connecting structure is provided at one end of the second connecting frame 22 and the second part 1142 of the connecting structure is provided at the other end. In addition, a second part, which is an extra plug, is provided in the three-point direction. This connection structure allows for an alternating arrangement of rows of springs, as shown in Figures 58 and 59. The springs are arranged more densely.

[0153] Example 9

[0154] In embodiment 8, the spring unit 1 is arranged in a hexagonal pattern, meaning both the first spring 11 and the second spring 12 are hexagonal. Since the second spring 12 is in contact with the human body, increasing the number of first springs 11 has limited effect on improving the comfort of the elastic pad and also increases costs.

[0155] Therefore, in the embodiment 4 with the connecting plate 2, the first spring 11 and the second spring 12 are connected to the connecting plate 2 respectively through a first plug-in structure and a second plug-in structure. Thus, by changing the distribution of the first and second plug-in structures on the connecting plate 2, the distribution of the first spring 11 and the second spring 12 can be made different. For example, in this embodiment, the first plug-in structures are arranged in an array, resulting in a matrix arrangement of the first springs 11. The second plug-in structures are staggered in adjacent rows, resulting in a hexagonal distribution of the second springs 12. This allows for a single increase in the number of second springs 12, reducing costs while significantly improving the comfort of the elastic pad, as shown in Figures 61 and 62.

[0156] Example 10

[0157] In embodiment 6, a conical third spring 13 is placed between the second springs 12. The second springs 12 are inverted cones, while the third spring 13 is a regular cone. When the upper elastic layer is compressed, the magnitude and direction of the force on the second springs 12 and the third spring 13 are inconsistent. Especially when the volume of the third spring 13 is smaller than that of the second spring 12, the uneven force will reduce the comfort of the elastic pad. Therefore, in order to ensure that the second spring 13 and the third spring 13 of the upper elastic layer can be subjected to uniform force while maintaining the density, thereby maintaining the comfort of the elastic pad, the following measures are taken.

[0158] Referring to Figures 63-68, in this embodiment, the second spring 12 and the second spring 13 are cylindrical in shape and of the same size. The second spring 12 is slightly smaller than the first spring 11, so that a space can be formed after splicing to accommodate the third spring 13. The second spring 12 and the third spring 13 are the same size and are both cylindrical. When the upper elastic layer is compressed, the second spring 12 and the third spring 13 experience the same force in both direction and magnitude.

[0159] The above description is merely a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention by those skilled in the art within the scope of the technology disclosed in the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention. Industrial applicability

[0160] This invention provides an elastic module comprising multiple spring units, which are spliced ​​together to form the elastic module. Each spring unit includes a first spring and a second spring. The first spring is axially compressible to a locked position. An end cap is provided at the upper end of the first spring, and a bottom cap is provided at the bottom of the second spring. The second spring is detachably mounted on the end cap to form the spring unit. This invention also provides an elastic pad comprising the above-mentioned elastic module, which has industrial applicability.

Claims

1. An elastic module, comprising multiple spring units, wherein the multiple spring units are spliced ​​together to form the elastic module, characterized in that, The spring unit includes a first spring and a second spring. The first spring is compressible to a locked position along the axial direction. The upper end of the first spring is provided with an end cap, and the bottom of the second spring is provided with a bottom cap. The second spring is detachably mounted on the end cap to form the spring unit.

2. The elastic module according to claim 1, characterized in that, The bottom cover of the second spring is screwed, plugged, or threaded to the end cover.

3. The elastic module according to claim 2, characterized in that, The bottom cover of the second spring is symmetrically provided with two screw-on parts, each screw-on part comprising a first part and a second part. The first part extends axially from the bottom of the base, and the second part is located at the end of the first part and extends radially outward from the center.

4. The elastic module according to claim 3, characterized in that, The top of the end cap is provided with a slide rail corresponding to each of the screw-on components as an installation structure. The slide rail is a strip-shaped recessed hole. The width of the strip-shaped recessed hole gradually narrows along the rotation direction of the screw-on component. The narrowest width of the strip-shaped recessed hole is less than the width of the second part.

5. The elastic module according to claim 2, characterized in that, The bottom of the second spring's cover is provided with a connector.

6. The elastic module according to claim 5, characterized in that, The top of the end cap is provided with a plug slot corresponding to the plug.

7. The elastic module according to claim 6, characterized in that, The bottom cover has a tapered connector with a gradually decreasing radius along the insertion direction. The top of the end cover has a corresponding insertion groove. The tapered connector is inserted into the insertion groove so that the tapered connector self-locks along the vertical direction.

8. The elastic module according to claim 6, characterized in that, The bottom of the bottom cover has two tapered connectors with gradually decreasing widths symmetrically arranged along the insertion direction, and a tapered groove is formed in the middle of the two tapered connectors; the top of the end cover has tapered insertion slots on both sides that mate with the tapered connectors, and a tapered protrusion is formed in the middle of the tapered insertion slots on both sides. The tapered connector is inserted into the tapered insertion slot, and the double-conical structure formed by the tapered connector and the tapered protrusion self-locks along the vertical direction.

9. The elastic module according to claim 2, characterized in that, The end cap is provided with a threaded connector, and the thread is provided on the outer wall of the threaded connector; the bottom cover is a ring, and the inner wall of the ring is provided with a thread, and the bottom cover of the second spring is threadedly connected to the threaded connector.

10. The elastic module according to claim 1, characterized in that, The spring units are arranged in a staggered hexagonal pattern.

11. An elastic module, comprising multiple spring units, wherein the multiple spring units are spliced ​​together to form the elastic module, characterized in that, The spring unit includes a first spring and a second spring. The first spring is compressible to a locked position along the axial direction. The top of the first spring includes an end cap, and the bottom of the second spring includes a bottom cap. It also includes a connecting plate. The end cap and the bottom cap are installed on both sides of the connecting plate to form the elastic module.

12. The elastic module according to claim 11, characterized in that, The connecting plate has a first plug-in structure at its lower part that plugs into the end cap of the first spring; the connecting plate has a second plug-in structure at its upper part that plugs into the bottom cap of the second spring.

13. The elastic module according to claim 12, characterized in that, The first spring is arranged in a matrix or in a staggered hexagonal arrangement along the transverse and longitudinal directions; the second spring is arranged in a matrix or in a staggered hexagonal arrangement along the transverse and longitudinal directions.

14. The elastic module according to claim 11, characterized in that... Four second springs are installed at the upper end of the first spring section.

15. The elastic module according to claim 12, characterized in that, The upper and lower sides of the connecting plate are respectively formed with circular protrusions along the vertical direction, and the bottom cover and the end cover are provided with concave holes that are interference fit with the circular protrusions.

16. The elastic module according to claim 12, characterized in that, The connecting plate has annular slots formed on its upper and lower sides along the vertical direction. The annular slots are equipped with tapered connectors that are inserted into the bottom cover or end cover and self-locked along the axial direction.

17. An elastic module comprising a plurality of spring units, characterized in that, The spring unit includes a first spring and a second spring. The first spring is compressible to a locked position along the axial direction. The upper end of the first spring is provided with an end cap, and the second spring is detachably mounted on the end cap. The plurality of spring units are arranged in a matrix along the transverse and longitudinal directions such that gaps are formed between adjacent rows or columns. A third spring is inserted between some or all of the gaps to form the elastic module.

18. The elastic module according to claim 17, characterized in that, The second spring is an inverted cone shape, and the third spring is a regular cone shape.

19. The elastic module according to claim 18, characterized in that, The second and third springs are cylindrical in shape and size.

20. An elastic module, comprising multiple spring units, wherein the multiple spring units are spliced ​​together to form the elastic module, characterized in that, The spring unit includes a first spring and at least two second springs. The first spring is compressible to a locked position along the axial direction. An end cap is provided at the upper end of the first spring, and the at least two second springs are detachably mounted on the end cap to form the spring unit.

21. The elastic module according to claim 20, characterized in that, The end cap is provided with at least two mounting structures, and the at least two second springs are inserted into or screwed onto the end cap through the second mounting structures.

22. The elastic module according to any one of claims 1-21, characterized in that, The second spring is compressible in the axial direction to the locked position.

23. The elastic module according to any one of claims 1-21, characterized in that, The second spring has a hollow structure, and multiple second springs can be stacked along the axial direction.

24. The elastic module according to claim 23, characterized in that, A flexible spring top cover is provided above the second spring, and the flexible spring top cover is inserted into the cavity structure of the second spring.

25. The elastic module according to any one of claims 1-21, characterized in that, The other end of the first spring is provided with a base, the end cap is provided with a first engaging structure at the lower end along the spring compression direction, and the base is provided with a second engaging structure at the upper end along the spring compression direction. In the locked position, the first engaging structure and the second engaging structure are engaged.

26. The elastic module according to claim 25, characterized in that, Two hooks are symmetrically arranged on the lower end face of the end cap along the compression direction as the first engagement structure. The hooks include a connecting part and a hook part, and the hook part is located on the outside of the connecting part.

27. The elastic module according to claim 26, characterized in that, Both sides of the base extend toward the center of the base to form a snap-fit ​​component as a second engaging structure. The snap-fit ​​component includes a connecting arm and a snap-fit ​​part. The snap-fit ​​part is located at the end of the connecting arm. The snap-fit ​​part is suspended so that the snap-fit ​​component has the elasticity to be pushed by the snap hook. When the first spring is in the locked position, the snap hook part and the snap-fit ​​part are axially limited to achieve a fastening.

28. The elastic module according to claim 27, characterized in that, The distance between the latching part and the central axis of the first spring gradually decreases along the spring compression direction, so that the latching part forms an inclined surface. Under the action of external force, the hook part slides down along the inclined surface to lock the bottom end of the latching part, so that the hook and the latching part are axially limited and engaged.

29. The elastic module according to claim 28, characterized in that, Under the action of external force, the hook part pushes against the locking part elastically until the hook part disengages from the locking part and the fastening is released.

30. The elastic module according to claim 25, characterized in that, The lower end face of the end cap is provided with a pusher along the compression direction, and the pusher is provided with elastic limiting members on both sides as the first engagement structure.

31. The elastic module according to claim 30, characterized in that, The upper surface of the base is provided with a limiting groove that cooperates with the elastic limiting member as a second engaging structure. A limiting wall is formed on one side of the limiting groove. Under the action of external force, the pushing member pushes the elastic limiting member to slide into the limiting groove until it is locked by the limiting wall to achieve engagement.

32. The elastic module according to any one of claims 1-21, characterized in that, The first spring includes a spring and a cloth sleeve, the cloth sleeve being wrapped around the outer surface of the spring; a collar is provided on the outer side of the cloth sleeve at the top of the spring, the lower surface of the collar being slotted inward along the vertical direction to form a ring groove, and the bottom surface of the end cap is provided with a locking structure, the locking structure being engaged with the ring groove and the collar being limited.

33. The elastic module according to claim 32, characterized in that, The collar includes a first part and a second part, the second part is located inside the fabric cover, the first part is located outside the fabric cover, and the first part and the second part are fastened and fixed to the spring.

34. The elastic module according to claim 25, characterized in that, The first spring includes a spring and a cloth sleeve, the cloth sleeve being included on the outer surface of the spring; a collar is provided on the outer side of the bottom of the spring and a protrusion is provided on the outer side of the collar; the base forms a U-shaped groove along the radial outer side, and a locking structure is formed on the top of the outer wall of the U-shaped groove, the collar is locked into the U-shaped groove, and the U-shaped groove and the collar are axially limited and matched.

35. The elastic module according to any one of claims 1-21, characterized in that, The spring in the second spring is removable.

36. An elastic pad, characterized in that, Includes the elastic module as described in any one of claims 1-35.

Images