Multistage cushioning and pressure-reducing module

Abstract

Disclosed is a multistage cushioning and pressure-reducing module, comprising a shell and a pull rod, wherein the pull rod is arranged in an accommodating cavity of the shell and extends out of an opening part at one end of the accommodating cavity; a plurality of elastic buffer assemblies are arranged in the accommodating cavity in the direction of movement of the pull rod; and at least one of the plurality of elastic buffer assemblies is provided with a follow-up mechanism, such that the plurality of elastic buffer assemblies at least creates two stages of a buffer bearing force on the pull rod as the pull rod is stretched.

Description

Multi-level shock absorption and decompression module

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 5, 2023, with application number 202322402572.X and invention name “Multi-stage shock-absorbing and decompression module”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of cushioning and shock-absorbing structures, and specifically to a multi-stage cushioning and pressure-reducing module. Background Art

[0003] Backpacks are common items in people's daily lives. When walking, the backpack will swing up and down with the body, and the sinking impact force generated can be as much as three times the weight of the backpack itself. During long periods of walking, it will continuously and repeatedly cause greater pressure on the shoulders and neck. Technical issues

[0004] In order to alleviate the impact force generated by the backpack during walking and reduce the pressure of the backpack on the shoulders and neck, the existing shock-absorbing solutions for products such as backpacks are as follows: one is to rely on the shoulder strap elastomer to generate cushioning, the second is to adopt an external mechanical slide rail structure, and the third is to adopt an internal spring structure. From the perspective of structural simplicity, shock-absorbing effect and cost, the internal spring structure is the best. For example, the Chinese utility model with announcement number CN218008624U provides a backpack shock-absorbing module, including: a shell, a movable part and several elastic elements; an installation cavity is provided inside the shell, the installation cavity is provided with an opening, and a guide groove is provided in the installation cavity; the movable part is provided in the installation cavity, and guide columns are provided on both sides of the movable part, and the guide columns slide in the guide groove, the lower part of the elastic element is connected to the shell, and the upper part of the elastic element is connected to the movable part.

[0005] However, internal spring structures typically use one or two springs, whether tension or compression. These springs are active throughout the entire load process, limiting their effectiveness to within their effective range of extension and contraction. Consequently, internal spring structures have a low load threshold, providing a good suspension and cushioning effect at loads between 4 and 6 kg. They are ineffective at loads too low or too high. Therefore, further optimization of existing internal spring structures is needed. Technical Solutions

[0006] The embodiment of the present application provides a multi-stage shock-absorbing and decompression module, comprising a housing and a pull rod. The housing is provided with a receiving cavity and an opening is provided at one end of the receiving cavity. The pull rod is provided in the receiving cavity and extends from the opening.

[0007] A plurality of elastic buffer components are arranged in the accommodating cavity along the moving direction of the pull rod, and at least one of the plurality of elastic buffer components is provided with a follower mechanism, which is connected to one end of the elastic buffer component and has a preset stroke in the moving direction of the pull rod; as the pull rod is stretched, the plurality of elastic buffer components form at least two levels of buffering bearing force on the pull rod. Beneficial effects

[0008] The multi-stage shock-absorbing and pressure-reducing module provided in the embodiment of the present application is equipped with multiple elastic buffer components along the moving direction of the pull rod in the accommodating cavity, and at least one of the multiple elastic buffer components is provided with a follow-up mechanism with a preset stroke in the moving direction of the pull rod; as the pull rod is stretched, the multiple elastic buffer components form at least two levels of buffering bearing force on the pull rod, thereby achieving a shock-absorbing effect under different load conditions, a large load threshold range, small space occupation, and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 is a three-dimensional structural diagram of a first multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application;

[0010] FIG2 is a front structural diagram of a first multi-stage shock-absorbing and decompression module provided in an embodiment of the present application;

[0011] FIG3 is an exploded front view of the first multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application;

[0012] FIG4 is a first three-dimensional exploded structure diagram of a multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application;

[0013] FIG5 is a second three-dimensional exploded structural diagram of the first multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application;

[0014] FIG6 is an exploded front view of the second multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application;

[0015] FIG7 is a three-dimensional exploded structural diagram of a second multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application;

[0016] FIG8 is an exploded front structural diagram of a third multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application;

[0017] FIG9 is a three-dimensional exploded structural diagram of a third multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application;

[0018] FIG10 is an exploded front structural diagram of a fourth multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application;

[0019] FIG11 is a three-dimensional exploded structural diagram of a fourth multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application;

[0020] FIG12 is an exploded front structural diagram of a fifth multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application;

[0021] FIG13 is a three-dimensional exploded structural diagram of a fifth multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application;

[0022] FIG14 is an exploded front view of the sixth multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application;

[0023] FIG15 is a three-dimensional decomposition diagram of the sixth multi-stage shock-absorbing and pressure-reducing module provided in an embodiment of the present application. Modes for Carrying Out the Invention

[0024] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] Example 1

[0026] The embodiment of the present application provides a multi-stage shock-absorbing and decompression module, comprising a housing and a pull rod. The housing is provided with a receiving cavity and an opening is provided at one end of the receiving cavity. The pull rod is provided in the receiving cavity and extends from the opening.

[0027] Multiple elastic buffer components are arranged in the accommodating cavity along the moving direction of the pull rod, and at least one of the multiple elastic buffer components is provided with a follower mechanism, which is connected to one end of the elastic buffer component and has a preset stroke in the moving direction of the pull rod; as the pull rod is stretched, the multiple elastic buffer components form at least two levels of buffering bearing force on the pull rod.

[0028] One end of at least one elastic buffer component is connected to the pull rod through a follower mechanism, and the other end is fixed in the shell; or one end of at least one elastic buffer component is connected to the shell through a follower mechanism, and the other end is fixed in the pull rod; the two ends of the remaining elastic buffer components are respectively fixed between the pull rod and the shell. When the pull rod is stretched, the elastic buffer component is stretched and drives the follower mechanism at the same time. When the follower mechanism reaches the preset stroke, the corresponding connected elastic buffer component provides bearing force at the same time.

[0029] When the pull rod is stretched, the elastic buffer assembly without a follower mechanism is stretched / compressed first, providing the first level of load-bearing force. At this time, the pull rod also drives the follower mechanism. When the follower mechanism reaches the preset stroke, the elastic buffer assembly connected to the follower mechanism is also stretched / compressed and provides load-bearing force. When multiple follower mechanisms are provided, the elastic buffer assembly will be stretched / compressed in turn and provide load-bearing force.

[0030] Taking a backpack as an example, the shell of the multi-stage shock-absorbing and decompression module is fixedly connected to the backpack body, the pull rod of the multi-stage shock-absorbing and suspension module is connected to the shoulder strap of the backpack, and the multi-stage shock-absorbing and suspension module reduces the impact force generated by the backpack during walking through the multi-stage shock-absorbing effect of multiple elastic buffer components, thereby reducing the pressure on the backpack. The connection between the multi-stage shock-absorbing and suspension module and the backpack adopts existing technology.

[0031] As shown in Figures 1-5, the shell includes an upper shell 10 and a bottom shell 20. A receiving cavity is formed between the upper shell 10 and the bottom shell 20. Correspondingly, a plurality of positioning holes 13 and a plurality of connecting posts 21 are provided between the upper shell 10 and the bottom shell 20. The connecting posts 21 are provided to connect to the back panel of the backpack.

[0032] An upper shell receiving groove 11 is formed on one side of the upper shell 10 , and the upper shell receiving groove 11 covers the bottom shell 20 to form a receiving cavity. An opening 12 is provided at one end of the upper shell receiving groove 11 , and the opening 12 communicates with the receiving cavity.

[0033] A fixing ring portion 16 is provided on the outer periphery of the upper housing 10 for mounting the module.

[0034] As shown in Figures 4 and 5, a connecting portion 31 is provided at one end of a pull rod 30, and a plurality of guide posts 33 are provided at the other end. Corresponding guide posts 33 are provided with guide grooves 22 on the bottom shell 20. The use of multiple guide grooves 22 and guide posts 33 can make the structure of the multi-stage shock-absorbing and decompression module more stable, prevent the elastic buffer assembly from deviating in the lateral direction, and prevent the elastic buffer assembly from friction and noise.

[0035] A guide limit block 34 is provided at the end of the guide column 33 . Corresponding to the guide limit block 34 , a limit stopper 15 is provided on the upper shell 10 and / or the bottom shell 20 , which is configured to limit the maximum stretching length of the pull rod 30 .

[0036] The upper shell 10 is provided with a first limiting guide groove 14 corresponding to the tension spring or compression spring of the elastic buffer assembly, and the bottom shell 20 is provided with a second limiting guide groove 23 correspondingly. Limiting partitions 24 are provided on both sides of the second limiting guide groove 23.

[0037] As shown in Figures 1-5, multiple elastic buffer components include several first tension springs 40 and several second tension springs 50 arranged in parallel along the moving direction of the pull rod, and the follow-up mechanism is a flexible rope 60; the length of the first tension spring 40 is greater than that of the second tension spring 50, and the two ends of the first tension spring 40 are respectively fixed between the pull rod 30 and the upper shell 10 or the bottom shell 20; one end of the second tension spring 50 is fixed to the bottom shell 20, and the other end is connected to the pull rod 30 through a flexible rope 60, or one end of the second tension spring 50 is fixed to the pull rod 30, and the other end is connected to the bottom shell 20 through a flexible rope 60.

[0038] A connecting portion 31 is formed at the upper part of the pull rod 30, and a plurality of hooks 32 are provided at the lower part. A connecting column 21 and a fixed column 25 are provided at the lower part of the bottom shell 20. The two ends of the first tension spring 40 are respectively fixed between the hook 32 and the hanging groove 210 at the bottom of the connecting column 21. The second tension spring 50 and the flexible rope 60 are respectively fixed between the hook 32 and the hanging groove at the bottom of the fixed column 25.

[0039] When in use, a second tension spring 50 and a flexible rope 60 are arranged between the two first tension springs 40. The first tension spring 40 first provides the bearing force. Since the flexible rope 60 is not initially tightened, the preset stroke is the distance that the pull rod 30 moves when the flexible rope 60 is tightened. After the flexible rope 60 is tightened, the second tension spring 50 and the first tension spring 40 jointly provide the bearing force.

[0040] Example 2

[0041] As shown in Figures 6 and 7, compared with embodiment 1, the multiple elastic buffer components of this embodiment include a plurality of first tension springs 40 and a plurality of second tension springs 50 arranged in parallel along the movable direction of the pull rod 30, and the follower mechanism is a movable rod 70;

[0042] The length of the first tension spring 40 is greater than that of the second tension spring 50, and the two ends of the first tension spring 40 are respectively fixed between the pull rod 30 and the upper shell 10 or the bottom shell 20; one end of the second tension spring 50 is fixed to the pull rod 30, and the other end is connected to the bottom shell 20 or the upper shell 10 through the movable rod 70.

[0043] A connecting portion 31 is formed at the upper part of the pull rod 30, and a plurality of hooks 32 are provided at the lower part. A connecting column 21 is provided at the lower part of the bottom shell 20. The two ends of the first tension spring 40 are respectively fixed between the hook 32 and the hanging groove 210 at the bottom of the connecting column 21. The bottom shell 20 is provided with a movable rod groove 26 corresponding to the movable rod 70. One end of the movable rod 70 is connected to the second tension spring 50 through a connecting hole 71, and the other end is provided with a limiting end 72. The limiting end 72 cooperates with the rod groove limiting portion 261 at the upper end of the movable rod groove 26.

[0044] A second tension spring 50 and a movable rod 70 are arranged between the two first tension springs 40. The first tension spring 40 first provides a bearing force. Since the movable rod 70 initially moves freely in the movable rod groove 26, the preset stroke is the length of the movable rod groove 26. When the limiting end 72 of the movable rod 70 reaches the rod groove limiting portion 261, the second tension spring 50 and the first tension spring 40 jointly provide a bearing force.

[0045] Example 3

[0046] As shown in Figures 8 and 9, compared with Example 1, the multiple elastic buffer components of this embodiment include a number of first tension springs 40 and a number of second tension springs 50 arranged in parallel along the moving direction of the pull rod 30, and the follower mechanism is an extension sleeve 80; the length of the first tension spring 40 is greater than the second tension spring 50, and the two ends of the first tension spring 40 are respectively fixed between the pull rod 30 and the upper shell 10 or the bottom shell 20; the pull rod 30 is provided with an extension sleeve 80 downward, one end of the second tension spring 50 is fixed to the bottom shell 20, and the other end is sleeved on the extension sleeve 80, and the extension sleeve 80 is provided with a long slot hole 81 corresponding to the hook of the second tension spring 50, or the bottom shell 20 is provided with an extension sleeve 80 upward, one end of the second tension spring 50 is fixed to the pull rod 30, and the other end is sleeved on the extension sleeve 80, and the extension sleeve 80 is provided with a long slot hole 81 corresponding to the hook of the second tension spring 50.

[0047] A connecting portion 31 is formed at the upper part of the pull rod 30, and a plurality of hooks 32 are provided at the lower part. A connecting column 21 and a fixed column 25 are provided at the lower part of the bottom shell body 20. The two ends of the first tension spring 40 are respectively fixed between the hook 32 and the hanging groove 210 at the bottom of the connecting column 21. One end of the second tension spring 50 is fixed to the fixed column 25, and the other end is provided in the long slot hole 81. The first tension spring 40 first provides a bearing force. Since the hook at the upper end of the second tension spring 50 is initially free to move in the long slot hole 81, the preset stroke is the length of the long slot hole 81. When the hook at the upper end of the second tension spring 50 reaches the limit position of the long slot hole 81, the second tension spring 50 and the first tension spring 40 jointly provide a bearing force.

[0048] Example 4

[0049] As shown in Figures 10 and 11, compared with Example 1, the multiple elastic buffer components of this embodiment include a number of first tension springs 40 and a number of second tension springs 50 arranged in parallel along the moving direction of the pull rod, and the follow-up mechanism is the side hook limit groove 27; the length of the first tension spring 40 is greater than that of the second tension spring 50, and the two ends of the first tension spring 40 are respectively fixed between the pull rod 30 and the upper shell 10 or the bottom shell 20; one end of the second tension spring 50 is fixed to the pull rod 30, and the hook at the other end cooperates with the side hook limit groove 27.

[0050] A connecting portion 31 is formed at the upper part of the pull rod 30, and a plurality of hooks 32 are provided at the lower part. A connecting column 21 is provided at the lower part of the bottom shell body 20. The two ends of the first tension spring 40 are respectively fixed between the hook 32 and the hanging groove 210 at the bottom of the connecting column 21. The upper end of the second tension spring 50 is fixed on the hook 32, and the lower end cooperates with the side hook limit groove 27.

[0051] It can be seen from Example 1 that a first limiting guide groove 14 and a second limiting guide groove 23 are set corresponding to the tension spring or compression spring, and limiting partitions 24 can be set on both sides. The side hook limiting groove 27 is set on one of the limiting partitions 24. When in use, the first tension spring 40 first provides a bearing force. Since the hook at the lower end of the second tension spring 50 initially moves freely in the side hook limiting groove 27, the preset stroke is the length of the side hook limiting groove 27. When the hook at the lower end of the second tension spring 50 reaches the limit position of the side hook limiting groove 27, the second tension spring 50 and the first tension spring 40 jointly provide a bearing force.

[0052] Example 5

[0053] As shown in Figures 12 and 13, compared with Example 1, the multiple elastic buffer components of this embodiment include a number of first tension springs 40 and a number of first compression springs 90 arranged in parallel along the moving direction of the pull rod 30, and the follow-up mechanism is a first compression spring mounting rod 35; the two ends of the first tension spring 40 are respectively fixed between the pull rod 30 and the upper shell 10 or the bottom shell 20; the pull rod 30 is provided with a first compression spring mounting rod 35 downward, and the first compression spring 90 is sleeved on the first compression spring mounting rod 35, and a first compression spring stopper 28 is provided on the bottom shell 20 corresponding to the upper end of the first compression spring 90.

[0054] The first compression spring mounting rod 35 is provided with a compression spring end 38 and a compression spring upper limit block 37 in sequence from the end. The first compression spring 90 is arranged between the compression spring end 38 and the compression spring upper limit block 37. The preset stroke is the distance between the compression spring upper limit block 37 and the first compression spring 90.

[0055] When in use, a first tension spring 40 is arranged between the two first compression springs 90. When the pull rod 30 is stretched, the first tension spring 40 first provides a bearing force. When the compression spring upper limit block 37 of the first compression spring mounting rod 35 reaches the first compression spring stop block 28, the two side ends of the first compression spring 90 are blocked by the first compression spring stop block 28. As the pull rod 30 continues to be stretched, the first compression spring 90 is compressed and thus provides a bearing force together with the first tension spring 40.

[0056] Example 6

[0057] As shown in Figures 14 and 15, compared with Example 1, the multiple elastic buffer components of this embodiment include a number of first tension springs 40 and a number of second compression springs 100 arranged in parallel along the moving direction of the pull rod 30, and the follow-up mechanism is a compression spring movable rod 110; the two ends of the first tension spring 40 are respectively fixed between the pull rod 30 and the upper shell 10 or the bottom shell 20; the pull rod 30 is downwardly provided with a compression spring rod slide 36, and the compression spring rod slide 36 is slidably matched with the upper part of the compression spring movable rod 110, and the upper end of the compression spring movable rod 110 is provided with a pin shaft 111, and the pin shaft 111 cooperates with the movable pin groove 361 on the compression spring rod slide 36; the second compression spring 100 is sleeved on the compression spring movable rod 110, and a second compression spring stopper 29 is provided on the bottom shell 20 corresponding to the upper end of the second compression spring 100.

[0058] A second compression spring 100 is arranged between the two first tension springs 40. When the pull rod 30 is stretched, the first tension spring 40 first provides a bearing force. The second compression spring 100 is sleeved between the compression spring rod end 112 of the compression spring movable rod 110 and the second compression spring stopper 29. As the pull rod 30 continues to be stretched, the pin shaft 111 at the upper end of the compression spring movable rod 110 slides in the movable pin groove 361 until the pin shaft 111 reaches the lower end of the movable pin groove 361. The second compression spring 100 is compressed and thus provides a bearing force together with the first tension spring 40. The above-mentioned multi-stage shock-absorbing and decompression module has at least two elastic buffer components, one of which is provided with a follower mechanism to form a two-stage buffer bearing force; in addition, the elastic buffer components can also be three, four or even more, one or several of which are provided with a follower mechanism to form a two-stage buffer bearing force, and the follower mechanism can have different strokes, so as to achieve three-stage and four-stage buffer bearing force; the elastic buffer component can be a tension spring, a compression spring, other elastic devices, and combinations thereof; the follower mechanism can be a flexible rope, a movable rod, a compression spring movable rod, etc.

[0059] The multi-stage shock-absorbing and pressure-reducing module provided in the embodiment of the present application is equipped with multiple elastic buffer components along the moving direction of the pull rod in the accommodating cavity, and at least one of the multiple elastic buffer components is provided with a follow-up mechanism with a preset stroke in the moving direction of the pull rod; as the pull rod is stretched, the multiple elastic buffer components form at least two levels of buffering bearing force on the pull rod, thereby achieving a shock-absorbing effect under different load conditions, a large load threshold range, small space occupation, and a wide range of applications.

[0060] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0061] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A multi-stage shock-absorbing and decompression module, wherein: It comprises a shell and a pull rod, wherein a receiving cavity is arranged in the shell and an opening is arranged at one end of the receiving cavity, and the pull rod is arranged in the receiving cavity and extends out from the opening; A plurality of elastic buffer components are arranged in the accommodating cavity along the moving direction of the pull rod, and at least one of the plurality of elastic buffer components is provided with a follower mechanism, which is connected to one end of the elastic buffer component and has a preset stroke in the moving direction of the pull rod; as the pull rod is stretched, the plurality of elastic buffer components form at least two levels of buffering bearing force on the pull rod.

2. The multi-stage shock absorbing and decompression module according to claim 1, wherein: One end of at least one elastic buffer component is connected to the pull rod through the follower mechanism, and the other end is fixed in the shell; or one end of at least one elastic buffer component is connected to the shell through the follower mechanism, and the other end is fixed in the pull rod; the two ends of the remaining elastic buffer components are respectively fixed between the pull rod and the shell, when the pull rod is stretched, the elastic buffer component is stretched and drives the follower mechanism at the same time, when the follower mechanism reaches a preset stroke, the correspondingly connected elastic buffer component provides a bearing force at the same time.

3. The multi-stage shock absorbing and decompression module according to claim 2, wherein: The shell comprises an upper shell and a bottom shell, a receiving cavity is formed between the upper shell and the bottom shell, and a plurality of positioning holes and a plurality of connecting columns which cooperate with each other are correspondingly arranged between the upper shell and the bottom shell.

4. The multi-stage shock absorbing and decompression module according to claim 3, wherein: An upper shell accommodating groove is formed on one side of the upper shell, and the upper shell accommodating groove covers the bottom shell to form an accommodating cavity. An opening is provided at one end of the upper shell accommodating groove, and the opening is connected to the accommodating cavity.

5. The multi-stage shock absorbing and decompression module according to claim 3, wherein: A connecting portion is arranged at one end of the pull rod, and a plurality of guide columns are arranged at the other end. Guide grooves are arranged on the bottom shell body corresponding to the guide columns.

6. The multi-stage shock absorbing and decompression module according to claim 5, wherein: A guide limit block is arranged at the end of the guide column, and a limit stop block is arranged on the upper shell and / or the bottom shell corresponding to the guide limit block, which is arranged to limit the maximum stretching length of the pull rod.

7. The multi-stage shock absorbing and decompression module according to claim 5, wherein: The multiple elastic buffer components include a plurality of first tension springs and a plurality of second tension springs arranged in parallel along the moving direction of the pull rod, and the follower mechanism is a flexible rope; the length of the first tension spring is greater than that of the second tension spring, and the two ends of the first tension spring are respectively fixed between the pull rod and the upper shell or the bottom shell; one end of the second tension spring is fixed to the bottom shell, and the other end is connected to the pull rod through the flexible rope, or one end of the second tension spring is fixed to the pull rod, and the other end is connected to the bottom shell through the flexible rope.

8. The multi-stage shock absorbing and decompression module according to claim 7, wherein: The upper part of the pull rod forms the connecting part, and the lower part is provided with a plurality of hooks. The lower part of the bottom shell body is provided with a connecting column and a fixing column. The two ends of the first tension spring are respectively fixed between the hook and the hanging groove at the bottom of the connecting column. The second tension spring and the flexible rope are respectively fixed between the hook and the hanging groove at the bottom of the fixing column.

9. The multi-stage shock absorbing and decompression module according to claim 5, wherein: The multiple elastic buffer components include a plurality of first tension springs and a plurality of second tension springs arranged in parallel along the movable direction of the pull rod, and the follower mechanism is a movable rod; the length of the first tension spring is greater than that of the second tension spring, and the two ends of the first tension spring are respectively fixed between the pull rod and the upper shell or the bottom shell; one end of the second tension spring is fixed to the pull rod, and the other end is connected to the bottom shell through the movable rod.

10. The multi-stage shock absorbing and decompression module according to claim 9, wherein: The connecting part is formed on the upper part of the pull rod, and a plurality of hooks are arranged on the lower part. A connecting column is arranged on the lower part of the bottom shell body, and the two ends of the first tension spring are respectively fixed between the hook and the hanging groove at the bottom of the connecting column. The bottom shell body is provided with a movable rod groove corresponding to the movable rod, one end of the movable rod is connected to the second tension spring through a connecting hole, and the other end is provided with a limiting end head, and the limiting end head cooperates with the rod groove limiting part at the upper end of the movable rod groove.

11. The multi-stage shock absorbing and decompression module according to claim 5, wherein: The multiple elastic buffer components include a plurality of first tension springs and a plurality of second tension springs arranged in parallel along the moving direction of the pull rod, and the follower mechanism is an extension sleeve rod; the length of the first tension spring is greater than that of the second tension spring, and the two ends of the first tension spring are respectively fixed between the pull rod and the upper shell body or the bottom shell body; the extension sleeve rod is arranged downwardly from the pull rod, one end of the second tension spring is fixed to the bottom shell body, and the other end is sleeved on the extension sleeve rod, and the extension sleeve rod is provided with a long slot hole corresponding to the hook of the second tension spring, or the extension sleeve rod is arranged upwardly from the bottom shell body, one end of the second tension spring is fixed to the pull rod, and the other end is sleeved on the extension sleeve rod, and the extension sleeve rod is provided with a long slot hole corresponding to the hook of the second tension spring.

12. The multi-stage shock absorbing and decompression module according to claim 11, wherein: The connecting part is formed on the upper part of the pull rod, and a plurality of hooks are arranged on the lower part. A connecting column and a fixing column are arranged on the lower part of the bottom shell body. Both ends of the first tension spring are respectively fixed between the hook and the hanging groove at the bottom of the connecting column. One end of the second tension spring is fixed to the fixing column, and the other end is arranged in the long slot hole. The first tension spring first provides the bearing force. Since the hook at the upper end of the second tension spring is initially free to move in the long slot hole, the preset stroke is the length of the long slot hole. When the hook at the upper end of the second tension spring reaches the limit position of the long slot hole, the second tension spring and the first tension spring jointly provide the bearing force.

13. The multi-stage shock absorbing and decompression module according to claim 5, wherein: The multiple elastic buffer components include a plurality of first tension springs and a plurality of second tension springs arranged in parallel along the moving direction of the pull rod, and the follower mechanism is a side hook limit groove; the length of the first tension spring is greater than that of the second tension spring, and the two ends of the first tension spring are respectively fixed between the pull rod and the upper shell or the bottom shell; one end of the second tension spring is fixed to the pull rod, and the hook at the other end cooperates with the side hook limit groove.

14. The multi-stage shock absorbing and decompression module according to claim 13, wherein: The upper part of the pull rod forms the connecting part, and the lower part is provided with a plurality of hooks. The lower part of the bottom shell is provided with a connecting column. The two ends of the first tension spring are respectively fixed between the hook and the hanging groove at the bottom of the connecting column. The upper end of the second tension spring is fixed to the hook, and the lower end cooperates with the side hook limit groove.

15. The multi-stage shock absorbing and decompression module according to claim 3, wherein: The multiple elastic buffer components include a plurality of first tension springs and a plurality of first compression springs arranged in parallel along the moving direction of the pull rod, and the follower mechanism is a first compression spring mounting rod; the two ends of the first tension spring are respectively fixed between the pull rod and the upper shell or the bottom shell; the first compression spring mounting rod is arranged downwardly of the pull rod, the first compression spring is sleeved on the first compression spring mounting rod, and a first compression spring stopper is arranged on the bottom shell corresponding to the upper end of the first compression spring.

16. The multi-stage shock absorbing and decompression module according to claim 15, wherein: The first compression spring mounting rod is provided with a compression spring end and a compression spring upper limit block in sequence from the end; the first compression spring is sleeved between the compression spring end and the compression spring upper limit block; the preset stroke is the distance between the compression spring upper limit block and the first compression spring stop block.

17. The multi-stage shock absorbing and decompression module according to claim 3, wherein: The multiple elastic buffer components include a plurality of first tension springs and a plurality of second compression springs arranged in parallel along the movable direction of the pull rod, and the follower mechanism is a compression spring movable rod; the two ends of the first tension spring are respectively fixed between the pull rod and the upper shell body or the bottom shell body; the pull rod is downwardly provided with a compression spring rod slide groove, and the compression spring rod slide groove is slidably matched with the upper part of the compression spring movable rod, and a pin shaft is provided at the upper end of the compression spring movable rod, and the pin shaft cooperates with the movable pin groove on the compression spring rod slide groove; the second compression spring is sleeved on the compression spring movable rod, and a second compression spring stopper is provided on the bottom shell body corresponding to the upper end of the second compression spring.

18. The multi-stage shock absorbing and decompression module according to claim 17, wherein: A second compression spring is arranged between the two first tension springs. When the pull rod is stretched, the first tension spring first provides a bearing force. The second compression spring is sleeved between the compression spring rod end of the compression spring movable rod and the second compression spring stop block. As the pull rod continues to be stretched, the pin shaft at the upper end of the compression spring movable rod slides in the movable pin groove until the pin shaft reaches the lower end of the movable pin groove. The second compression spring is compressed to provide a bearing force together with the first tension spring.

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