Shoulder strap buffering device and backpack

Abstract

The utility model discloses a shoulder strap buffering device and a backpack. The shoulder strap buffering device comprises a shell, a fixed part, a movable part, a first elastic part and a second elastic part. The shell is provided with a containing cavity, and the first elastic piece, the movable piece, the second elastic piece and the fixed piece are arranged in the containing cavity and distributed in the first direction. One end of the first elastic piece abuts against the movable piece, and the two ends of the second elastic piece are connected with the movable piece and the fixed piece respectively. And the fixing piece has a fixed state of being fixed relative to the shell. The movable part can move in the first direction relative to the shell, and the movable part moves under the influence of the shoulder strap, so that the first elastic part is compressed or stretched, and the second elastic part is stretched or compressed. Through the elastic deformation of the first elastic piece and the second elastic piece, the vibration amplitude and duration of the shoulder strap are reduced, and then the vibration or impact of the shoulder strap caused by walking or jumping is reduced.

Description

Technical Field

[0001] This application relates to the field of backpacks, and more particularly to a shoulder strap cushioning device and a backpack. Background Technology

[0002] When a person walks or jumps while carrying a backpack, the height of their shoulders relative to the ground constantly changes, causing the backpack to sway up and down. During this process, the backpack exerts direct pressure on the shoulders. Over time, this can cause irreversible damage to the spine and neck. Related technologies offer some shock absorption solutions. However, these solutions are not very effective.

[0003] The above content is only used to assist in understanding the technical solution of the utility model and does not represent an admission that the above content is prior art. Utility Model Content

[0004] In view of the above problems, this utility model proposes a shoulder strap cushioning device and a backpack, aiming to solve the technical problem of poor shock absorption effect of the shoulder strap cushioning device.

[0005] To achieve the above objectives, the shoulder strap cushioning device proposed in this utility model includes a housing, a fixing member, a movable member, a first elastic member, and a second elastic member. The housing has a receiving cavity, and the first elastic member, the movable member, the second elastic member, and the fixing member are placed in the receiving cavity and distributed along a first direction. One end of the first elastic member abuts against the movable member, and both ends of the second elastic member are respectively connected to the movable member and the fixing member. The fixing member has a fixed state relative to the housing, and the movable member can move relative to the housing along the first direction, so that the first elastic member and the second elastic member can be stretched or compressed.

[0006] In one embodiment, the housing is provided with a plurality of first locking portions distributed along the first direction, and the fixing member is provided with second locking portions; the first locking portions and the second locking portions can be engaged to keep the fixing member fixed relative to the housing and have the fixed state; the first locking portions and the second locking portions can be separated to put the fixing member in an active state, and in the active state, the fixing member can move relative to the housing along the first direction.

[0007] Further, the fixing member includes a movable body, a pressing body, a connecting part, and a resetting member; the pressing body includes a base part and a pressing part protruding from the base part, the movable body is provided with a first through hole and a second through hole; the connecting part is fixed to the movable body and forms an installation space, the base part is placed in the installation space, the pressing part is movably disposed in the first through hole, and the resetting member is disposed between the connecting part and the base part to reset the pressing part in a direction away from the connecting part; the housing is provided with a first sliding groove extending along the first direction; the pressing part protrudes from the first sliding groove; the second locking part is disposed in the base part and movably disposed in the second through hole, when the pressing part is pressed, the second locking part separates from the first locking part, so that the pressing part and the first sliding groove move in a cooperative manner along the first direction; when the external force applied to the pressing part is removed, the resetting member resets the pressing part in a direction away from the connecting part, and the first locking part and the second locking part abut.

[0008] Furthermore, the housing has a first sliding groove on one side and a second sliding groove extending along the first direction on the other side; the pressing part and the connecting part protrude from two opposite sides of the movable body, the pressing part is movablely engaged with the first sliding groove along the first direction, and the connecting part is movablely engaged with the second sliding groove along the first direction.

[0009] In one embodiment, the housing is provided with a guide post extending along the first direction, the first elastic member is sleeved on the guide post, the other end of the first elastic member abuts against the housing, and the movable member is provided with a guide hole that is movably connected to the guide post.

[0010] Furthermore, the housing is provided with two guide posts, and the movable member is provided with two guide holes corresponding to the two guide posts; a limiting head is provided at one end of the guide post near the fixing member, the limiting head protrudes laterally from the guide post, and the movable member can abut against the limiting head.

[0011] In one embodiment, the movable part is provided with a fixing hole, and the housing is provided with a mounting hole, so that the shoulder strap passes through the mounting hole and is connected to the fixing hole.

[0012] In one embodiment, the housing includes a first housing and a second housing, which together enclose a receiving cavity.

[0013] In one embodiment, the movable component includes a first block and a second block fixed to each other. The first block is provided with a first connecting post, and the second block is provided with a first insertion hole for the first connecting post to be inserted. One end of the second elastic component is provided with a first hanging ring and sleeved on the first connecting post. And / or, the fixed component includes a third block and a fourth block fixed to each other. The third block is provided with a second connecting post, and the fourth block is provided with a second insertion hole for the second connecting post to be inserted. The other end of the second elastic component is provided with a second hanging ring and sleeved on the second connecting post.

[0014] This utility model also proposes a backpack. The backpack includes a backpack body, at least one set of shoulder strap assemblies, and a shoulder strap cushioning device; the shoulder strap assembly includes a first shoulder strap and a second shoulder strap, one end of the first shoulder strap and the second shoulder strap are fixedly connected to the backpack body; the other end of the first shoulder strap is connected to the movable part, and the other end of the second shoulder strap is connected to the shell.

[0015] This invention discloses a shoulder strap cushioning device and a backpack. The shoulder strap cushioning device includes a housing, a fixing member, a movable member, a first elastic member, and a second elastic member. The housing has a receiving cavity, within which the first elastic member, the movable member, the second elastic member, and the fixing member are placed and distributed along a first direction. One end of the first elastic member abuts against the movable member, and both ends of the second elastic member are connected to the movable member and the fixing member, respectively. The fixing member is fixed relative to the housing. The movable member is movable relative to the housing along the first direction. Under the influence of the shoulder strap, the movable member is displaced, causing the first elastic member to be compressed or stretched, and the second elastic member to be stretched or compressed. This invention reduces the amplitude and duration of shoulder strap vibration through the elastic deformation of the first and second elastic members, thereby reducing shoulder strap vibration or impact caused by walking or jumping. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of an embodiment of the shoulder strap cushioning device of this utility model is shown;

[0018] Figure 2 for Figure 1 Another structural diagram of the shoulder strap cushioning device;

[0019] Figure 3 for Figure 1 Front view of the shoulder strap cushioning device;

[0020] Figure 4 for Figure 3 A sectional view along line IV-IV;

[0021] Figure 5 for Figure 3 A cross-sectional view along line VV;

[0022] Figure 6 for Figure 1 A schematic diagram of the middle shoulder strap cushioning device (second housing omitted);

[0023] Figure 7 for Figure 1 Schematic diagram of the structure of the second shell in the middle;

[0024] Figure 8 for Figure 6 Exploded view of the central fastener;

[0025] Figure 9 for Figure 6 A structural schematic diagram of the moving part, the second elastic part, and the fixing part;

[0026] Figure 10 for Figure 9 Exploded view of the moving part, the second elastic part, and the fixed part;

[0027] Figure 11 This is a schematic diagram of the backpack structure.

[0028] Explanation of icon numbers:

[0029] label name label name label name 100 shoulder strap cushioning device 18 Second chute 51 Connection part 10 case 19 First locking part 52 main body of the event 11 Guide column 20 First elastic element 53 Press the main body 111 Limit head 30 Second elastic element 54 Reset component 12 First side wall 31 First hanging ring 55 Third body 121 / 122 Mounting holes 32 Second hanging ring 551 Second connecting post 13 beam 40 Active parts 56 Fourth block 14 First shell 41 Guide hole 561 Second socket 141 first convex part 42 Fixing hole 57 Second locking part 15 Second shell 43 First block 200 Backpack 151 second convex part 431 First connecting post 60 Backpack body 152 Through hole 44 Second block 70 shoulder strap assembly 16 Container cavity 441 First socket 71 First shoulder strap 17 First chute 50 Fasteners 72 Second shoulder strap 521 First via 522 Second via 531 base 532 Pressing part 58 Installation space

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text is to include three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies both A and B.

[0034] This utility model proposes a shoulder strap cushioning device.

[0035] In this embodiment of the utility model, please refer to Figure 1 , Figure 2 , Figure 6 as well as Figure 7 The shoulder strap cushioning device 100 includes a housing 10, a fixing member 50, a movable member 40, a first elastic member 20, and a second elastic member 30. The housing 10 has a receiving cavity, in which the first elastic member 20, the movable member 40, the second elastic member 30, and the fixing member 50 are placed and distributed along a first direction. One end of the first elastic member 20 abuts against the movable member 40, and the two ends of the second elastic member 30 are respectively connected to the movable member 40 and the fixing member 50. The fixing member 50 has a fixed state relative to the housing 10, and the movable member 40 can move relative to the housing 10 along the first direction so that the first elastic member 20 and the second elastic member 30 can be stretched or compressed.

[0036] When walking or jumping, the backpack rises or falls, causing the shoulder straps to sway and putting significant pressure on the shoulders. In severe cases, this can cause the body to fall backward, damaging the spine. The shoulder strap cushioning device 100 provided in this embodiment can absorb shock and mitigate the adverse effects of the shoulder straps. In some embodiments, the shoulder strap causes the movable member 40 to move toward the first elastic member 20, at which point the first elastic member 20 is compressed and the second elastic member 30 is stretched. In other embodiments, the shoulder strap causes the movable member 40 to move away from the first elastic member 20, at which point the first elastic member 20 is compressed and the second elastic member 30 is stretched.

[0037] The first elastic element 20 and the second elastic element 30 are in a state of tension and compression, respectively. On one hand, the first elastic element 20 and the second elastic element 30 absorb and convert the energy of external forces, thereby reducing shoulder girdle vibration or impact caused by walking or jumping, and thus reducing the pressure of the shoulder girdle on the shoulder. On the other hand,

[0038] The first elastic element 20 and the second elastic element 30 can offset part of the external force to achieve elastic balance, thereby reducing the amplitude and duration of the shoulder strap vibration.

[0039] This invention relates to a shoulder strap cushioning device 100 and a backpack 200. The shoulder strap cushioning device 100 includes a housing 10, a fixing member 50, a movable member 40, a first elastic member 20, and a second elastic member 40. The housing 10 has a receiving cavity 16, within which the first elastic member 20, the movable member 40, the second elastic member 40, and the fixing member 50 are disposed and distributed along a first direction. One end of the first elastic member 20 abuts against the movable member 40, and both ends of the second elastic member 40 are connected to the movable member 40 and the fixing member 50, respectively. The fixing member 50 is fixed relative to the housing 10. The movable member 40 is movable relative to the housing 10 along the first direction. Under the influence of the shoulder strap, the movable member 40 is displaced, causing the first elastic member 20 to be compressed or stretched, and the second elastic member 40 to be stretched or compressed. This invention reduces the amplitude and duration of shoulder strap vibration through the elastic deformation of the first elastic member 20 and the second elastic member 40, thereby reducing shoulder strap vibration or impact caused by walking or jumping.

[0040] In one embodiment, the housing 10 is provided with a plurality of first locking portions 19 distributed along a first direction, and the fixing member 50 is provided with second locking portions 57; the first locking portions 19 and the second locking portions 57 can be engaged to keep the fixing member 50 fixed relative to the housing 10 and have a fixed state; the first locking portions 19 and the second locking portions 57 can be separated to make the fixing member 50 in an active state, and in the active state, the fixing member 50 can move relative to the housing 10 along the first direction.

[0041] In the active state, the user can adjust the length of the backpack shoulder strap by adjusting the relative position between the fixing part 50 and the movable part 40. At the same time, the user can move the fixing part 50 to a preset position, so that the first locking part 19 and the second locking part 57 are engaged, thereby keeping the shoulder strap cushioning device 100 at the preset position.

[0042] In this embodiment, the first elastic element 20 is compressed or stretched along with the movement of the fixed element 50 during gear adjustment. Simultaneously, the first elastic element 20 generates elastic force to resist deformation. The work done by the external force converts energy into and stores it in the first elastic element 20, thereby producing a shock-absorbing effect to prevent excessive pressure on the shoulders when the backpack shifts gears. The second elastic element 30 can assist the shoulder strap cushioning device 100 in achieving gear adjustment through changes in its own length, and can also achieve shock absorption during gear adjustment through its own restoring force. Furthermore, the movable element 40 and the fixed element 50 are movably connected to the housing 10 along a first direction, so that the movable element 40 and the fixed element 50 move in the same direction, and the first elastic element 20 and the second elastic element 30 undergo elastic deformation in the same direction, thus giving the shoulder strap cushioning device 100 a dual shock-absorbing effect. In this way, a dual shock-absorbing effect can be generated while quickly adjusting the shoulder strap length, reducing the pressure on the shoulders caused by the backpack's shoulder strap adjustment.

[0043] In one embodiment, please refer to Figure 3 , Figure 5 and Figure 6 The housing 10 contains a guide post 11, and a first elastic member 20 is sleeved on the guide post 11. The other end of the first elastic member 20 abuts against the housing 10. The movable member 40 is provided with a guide hole 41 that is movably connected to the guide post 11. The guide hole 41 is sleeved on the guide post 11 to fix the movable member 40 to the guide post 11.

[0044] Further, please refer to Figure 6 The guide post 11 has a limiting head 111 at one end near the fixing member 50. The limiting head 111 protrudes laterally from the guide post 11, and the movable member 40 can abut against the limiting head 111. The limiting head 111 restricts the movable member 40 from disengaging in the direction near the fixing member 50, and at the same time restricts the first elastic member 20 from being compressed and stretched only within the length of the guide post 11.

[0045] In some embodiments, the housing 10 is provided with two guide posts 11, and the movable member 40 is provided with two guide holes 41 corresponding to the two guide posts 11.

[0046] In one embodiment, please refer to Figure 1 , Figure 3 as well as Figure 6 The movable part 40 is provided with a fixing hole 42. The fixing hole 42 is used to fix it to the backpack shoulder strap. The housing 10 is provided with mounting holes 121 / 122 so that the shoulder strap passes through the mounting holes 121 / 122 and is connected to the fixing hole 42.

[0047] In some embodiments, the housing 10 has a first sidewall 12 extending along a first direction, and the first sidewall 12 has a mounting hole 121 corresponding to the fixing hole 42. The mounting hole 121 extends along the first direction in an elongated shape. The mounting hole 121 provides an operating space for the installer to fix the backpack shoulder strap to the fixing hole 42.

[0048] The housing 10 also includes a crossbeam 13, with both ends of the crossbeam 13 connected to the walls of the mounting holes 121. The extending direction of the crossbeam 13 intersects with the first direction. Intersection means that the two are not parallel, and there is an angle between the first direction and the extending direction of the crossbeam 13, which is greater than 0. In some embodiments, the first direction and the extending direction of the crossbeam 13 are perpendicular or approximately perpendicular. The function of the crossbeam 13 is to increase friction and prevent the backpack shoulder straps from swaying left and right when a person walks or jumps. When installing the shoulder strap cushioning device 100 onto the backpack shoulder strap, first locate the mounting hole 121, then overlap the backpack shoulder strap above the crossbeam 13, then pass the backpack shoulder strap through the fixing hole 42 and secure it to the movable part 40.

[0049] In other embodiments, the shoulder strap passes directly through the mounting hole 122 and is then secured to the fixing hole 42.

[0050] In one embodiment, please refer to Figure 1 , Figure 3 , Figure 4 , Figure 6 as well as Figure 9 The fixing member 50 includes a movable body 52, a pressing body 53, a connecting part 51, and a resetting member 54. The pressing body 53 includes a base part 531 and a pressing part 532 protruding from the base part 531. The movable body 52 is provided with a first through hole 521 and a second through hole 522. The connecting part 51 is fixed to the movable body 52 and forms an installation space 58. The base part 531 is placed in the installation space 58. The pressing part 532 is movably disposed in the first through hole 521. The resetting member 54 is disposed between the connecting part 51 and the base part 531 so that the pressing part 532 can extend further. The direction of the connection part 51 is reset; the housing 10 is provided with a first sliding groove 17 extending in a first direction; the pressing part 532 protrudes from the first sliding groove 17 to be exposed from the first sliding groove 17; the second locking part is provided in the base part 531 and is movably provided in the second through hole 522. When the pressing part 532 is pressed, the second locking part 57 separates from the first locking part 19. The user can adjust the gear by adjusting the position of the pressing part 532, changing the elastic force of the first elastic member 20 and the second elastic member 40, and then adjusting the shock absorption and cushioning capacity of the shoulder strap cushioning device 100. When the force on the pressing part 532 is removed, the reset member 54 is in a natural state. At this time, the first locking part 19 and the second locking part 57 are locked, and the shoulder strap cushioning device 100 maintains the current gear state.

[0051] Further, please refer to Figure 6 and Figure 7 The housing 10 has a receiving cavity 16, in which the first elastic element 20, the second elastic element 30, the movable element 40, and the fixing element 50 are housed. The housing 10 provides protection for the first elastic element 20, the second elastic element 30, etc., improving the impact resistance of the shoulder strap cushioning device 100, facilitating modular installation of the backpack, and simplifying subsequent maintenance. A first sliding groove 17 is provided on one side of the housing 10, and a second sliding groove 18 is provided on the other side, both extending along a first direction. The first sliding groove 17 and the second sliding groove 18 define the movement trajectory of the fixing element 50, guiding its movement. A pressing part 532 and a connecting part 51 protrude from opposite sides of the movable body 52. ​​The pressing part 532 engages with the first sliding groove 17 along the first direction, and the connecting part 51 engages with the second sliding groove 18 along the first direction.

[0052] In one embodiment, please refer to Figure 1 The second locking part 57 is a protrusion provided on the pressing part 532, and the first locking part 19 includes a plurality of holes spaced apart along a first direction. When the pressing part 532 is pressed, it causes the second locking part 57 to retract from the holes. When the external force applied to the pressing part 532 is removed, the reset member 54 causes the pressing part 532 to return to its original position away from the connecting part 51, and the second locking part 57 extends into one of the holes. This allows for a direct observation of whether the fixing member 50 is in a locked or unlocked state, thereby improving the ease of use of the shoulder strap cushioning device 100.

[0053] In some embodiments, the first locking part 19 is a serrated guide rail, and the second locking part 57 is a stop protrusion. The two cooperate with each other to achieve gear adjustment.

[0054] In one embodiment, please refer to Figure 6 and Figure 7The housing 10 includes a first housing 14 and a second housing 15, which together form a receiving cavity 16. A second elastic member 30, a movable member 40, and a fixing member 50 are housed within the receiving cavity 16. The inner wall of the first housing 14 has two first protrusions 141, and the inner wall of the second housing 15 has two second protrusions 151. The first protrusions 141 and 151 correspond one-to-one and each has a through hole 152 for fasteners to pass through. The first protrusions 141 and 151 can both strengthen the structural strength of the housing 10 and prevent damage to the housing 10 during fastener installation. Fasteners include, but are not limited to, screws, bolts, and rivets. The fixing member 50 is located between the two first protrusions 141 and has a clearance fit or contact with the first protrusions 141. This ensures that the movement trajectory of the fixing member 50 is fixed, preventing it from affecting the gear adjustment function or shock absorption effect if it moves out of the preset direction within the receiving cavity 16.

[0055] In one embodiment, please refer to Figures 3 to 5 , Figure 9 as well as Figure 10 The movable component 40 includes a first block 43 and a second block 44 fixed to each other. The first block 43 is provided with a first connecting post 431, and the second block 44 is provided with a first insertion hole 441 for the first connecting post 431 to be inserted. One end of the second elastic member 30 is provided with a first hanging ring 31 and is sleeved on the first connecting post 431, and one end of the second elastic member 30 is clamped between the first block 43 and the second block 44. This not only stably fixes the second elastic member 30 to the movable component 40, but also facilitates repair or replacement when the second elastic member 30 exceeds its elastic limit and cannot return to its natural state.

[0056] The fixing component 50 includes a third block 55 and a fourth block 56 that are fixed to each other. The third block 55 is provided with a second connecting post 551, and the fourth block 56 is provided with a second insertion hole 561 for inserting the second connecting post 551. The other end of the second elastic member 30 is provided with a second hanging ring 32 and is sleeved on the second connecting post 551, and the other end of the second elastic member 30 is clamped between the third block 55 and the fourth block 56. This not only stably fixes the second elastic member 30 to the fixing component 50, but also facilitates maintenance or replacement when the second elastic member 30 exceeds its elastic limit and cannot return to its natural state.

[0057] This utility model also proposes a backpack 200, see [link]. Figure 11The backpack 200 includes a backpack body 60, at least one set of shoulder strap assemblies 70, and a shoulder strap cushioning device 100. The specific structure of the shoulder strap cushioning device 100 is as described in the above embodiments. Since the backpack 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The backpack 200 includes, but is not limited to, a backpack or a crossbody bag. The shoulder strap assembly 70 includes a first shoulder strap 71 and a second shoulder strap 72, one end of which is fixedly connected to the backpack body 60. The fixed connection includes detachable and non-detachable connections. The other end of the first shoulder strap 71 is connected to a movable part 40. More specifically, in some embodiments, the first shoulder strap 71 is fixedly connected to the shoulder strap cushioning device 100 through a fixing hole 42. The other end of the second shoulder strap 72 is connected to the housing 10. In some embodiments, the shoulder strap cushioning device 100 is fixed to the second shoulder strap 72 by sewing.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A shoulder strap cushioning device, characterized in that, It includes a housing, a fixing component, a moving component, a first elastic component, and a second elastic component; The housing has a receiving cavity, and the first elastic member, the movable member, the second elastic member and the fixed member are placed in the receiving cavity and distributed along a first direction. One end of the first elastic member abuts against the movable member, and the two ends of the second elastic member are respectively connected to the movable member and the fixed member. The fixing member has a fixed state relative to the housing, and the movable member can move relative to the housing along the first direction so that the first elastic member and the second elastic member can be stretched or compressed.

2. The shoulder strap cushioning device as described in claim 1, characterized in that, The housing is provided with a plurality of first locking portions distributed along the first direction, and the fixing member is provided with a second locking portion; The first locking part and the second locking part can be engaged to keep the fixing member fixed relative to the housing and thus have the fixed state; The first locking portion and the second locking portion can be separated to put the fastener in an active state, in which the fastener can move relative to the housing along the first direction.

3. The shoulder strap cushioning device as described in claim 2, characterized in that, The fixing component includes a movable body, a pressing body, a connecting part, and a resetting part; the pressing body includes a base part and a pressing part protruding from the base part, and the movable body is provided with a first through hole and a second through hole; the connecting part is fixed to the movable body and forms an installation space, the base part is placed in the installation space, the pressing part is movably disposed in the first through hole, and the resetting part is disposed between the connecting part and the base part to reset the pressing part away from the connecting part; The housing is provided with a first sliding groove extending along the first direction; the pressing part protrudes from the first sliding groove; The second locking part is disposed on the base part and movably disposed in the second through hole. When the pressing part is pressed, the second locking part separates from the first locking part so that the pressing part and the first sliding groove move in the first direction. When the external force applied to the pressing part is removed, the reset member resets the pressing part in the direction away from the connecting part, and the first locking part and the second locking part are connected.

4. The shoulder strap cushioning device as described in claim 3, characterized in that, The housing has the first groove on one side and a second groove extending along the first direction on the other side. The pressing part and the connecting part protrude from two opposite sides of the movable body, the pressing part is movablely engaged with the first slide groove in the first direction, and the connecting part is movablely engaged with the second slide groove in the first direction.

5. The shoulder strap cushioning device as described in any one of claims 1-4, characterized in that, The housing is provided with a guide post extending along the first direction, the first elastic member is sleeved on the guide post, the other end of the first elastic member abuts against the housing, and the movable member is provided with a guide hole that is movably connected to the guide post.

6. The shoulder strap cushioning device as described in claim 5, characterized in that, The housing is provided with two guide posts, and the movable part is provided with two guide holes corresponding to the two guide posts; The guide post has a limiting head at one end near the fixing member. The limiting head protrudes laterally from the guide post, and the movable member can abut against the limiting head.

7. The shoulder strap cushioning device as described in any one of claims 1-4, characterized in that, The movable part is provided with a fixing hole, and the housing is provided with a mounting hole so that the shoulder strap passes through the mounting hole and is connected to the fixing hole.

8. The shoulder strap cushioning device as claimed in claim 1, characterized in that, The housing includes a first housing and a second housing, which together enclose the accommodating cavity.

9. The shoulder strap cushioning device as claimed in claim 1, characterized in that, The movable component includes a first block and a second block fixed to each other. The first block has a first connecting post, and the second block has a first insertion hole for inserting the first connecting post. One end of the second elastic component has a first hanging ring and is sleeved on the first connecting post; and / or... The fastener includes a third block and a fourth block that are fixed to each other. The third block is provided with a second connecting post, and the fourth block is provided with a second insertion hole for the second connecting post to be inserted. The other end of the second elastic member is provided with a second hanging ring and is sleeved on the second connecting post.

10. A backpack, characterized in that, Includes a backpack body, at least one set of shoulder strap assemblies, and a shoulder strap cushioning device as described in any one of claims 1 to 9; The shoulder strap assembly includes a first shoulder strap and a second shoulder strap, one end of which is fixedly connected to the main body of the backpack; the other end of the first shoulder strap is connected to the movable part, and the other end of the second shoulder strap is connected to the shell.

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