A load-reducing levitation backpack with automatic system stiffness adjustment

Abstract

This invention discloses a weight-reducing suspension backpack with automatic adjustment of system stiffness, relating to the field of weight-reducing backpack technology. The invention includes a back panel with multiple trolleys fixedly connected to it. A fixed frame is slidably connected to each trolley, and a load plate is mounted on the fixed frame. A hook is slidably connected to the side wall of the load plate, and multiple limiting rods are mounted on the load plate to limit the hook's movement. One end of each hook is rotatably connected to a linkage assembly, and a balancing component is mounted on the linkage assembly. A sliding weight-reducing unit is mounted on the side of the back panel facing the load plate, and the balancing component acts on the sliding weight-reducing unit. Through the coordinated operation of the limiting rods, hook, balancing component, and linkage assembly, this invention can automatically adjust the system stiffness according to changes in load weight, resulting in a better phase difference in the output and thus reducing the maximum impact load on the human body. It is simple to operate and convenient to use.

Description

Technical Field

[0001] This invention relates to the field of lightweight backpack technology, specifically a lightweight suspension backpack with an automatic adjustment system stiffness. Background Technology

[0002] Backpacks have improved the way humans carry loads; however, excessive loads can still cause irreversible damage to our bones and muscles. The static force of a backpack load cannot be changed, but its dynamic force can be reduced through a vibration system similar to a carrying pole. Traditional backpacks simply bind the human body and the load together, making their movements completely identical, which does not achieve the effect of reducing the load. Suspension backpacks, on the other hand, decouple the load from the human body through a suspension system and use the characteristics of a single-degree-of-freedom vibration system to make their accelerations reverse, thereby reducing the maximum impact load after the resultant load.

[0003] However, the vibration frequency required for the vibration system to reduce the load varies depending on the weight of the load. Using a motor to adjust the frequency would introduce a larger load, and constantly replacing the springs would be too cumbersome. Therefore, we propose a load-reducing suspension backpack that automatically adjusts the stiffness of the system. Summary of the Invention

[0004] The purpose of this invention is to provide a weight-reducing suspension backpack with an automatic adjustment system stiffness, which achieves automatic stiffness conversion through a mechanical structure, eliminating the need for manual replacement of springs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a load-reducing suspension backpack with automatic adjustment system stiffness, comprising a back panel, a plurality of trolleys fixedly connected to the back panel, a fixed frame slidably connected to the trolleys, a load plate mounted on the fixed frame, hooks slidably connected to the side wall of the load plate, and a plurality of limiting rods for limiting the hooks mounted on the load plate.

[0006] One end of the hook is rotatably connected to a connecting rod assembly, and a balancing component is installed on the connecting rod assembly;

[0007] A sliding load-reducing unit is installed on the side of the back plate facing the load plate, and the balancing component acts on the sliding load-reducing unit.

[0008] Furthermore, a carrying strap is installed on the back panel, and a load bag is fixedly connected to the hook.

[0009] Furthermore, the number of trolleys is four, the four trolleys are arranged in a rectangular shape, and the fixed frame is provided with a sliding groove that is compatible with the trolleys.

[0010] Furthermore, the number of hooks is two, and the load plate is provided with an arc-shaped groove adapted to the hooks.

[0011] Furthermore, a square groove is formed on the side wall of the load plate above the arc groove, and the square groove and the arc groove are interconnected to form a storage channel, with multiple limiting rods evenly arranged in the storage channel.

[0012] Furthermore, each of the multiple limiting rods is fixedly connected to a secondary steel rope at its top, and the top ends of the multiple secondary steel ropes are fixed to a main steel rope. The main steel rope passes through the side wall of the square groove, and a pull ring is fixedly connected to the free end of the main steel rope.

[0013] Furthermore, the linkage assembly includes a first link rotatably connected to the hook, the other end of the first link rotatably connected to the load plate, and the connection point between the first link and the load plate is the center point of the arc groove;

[0014] The first connecting rod is rotatably connected to the second connecting rod at the end near the hook.

[0015] Furthermore, the balancing assembly includes a first slider rotatably connected to the free end of the second connecting rod, a first elastic element fixedly connected to the side wall of the first slider, and a first guide rail slidably connected to the bottom of the first slider, and the first guide rail is fixed along the width direction of the load plate.

[0016] Furthermore, the sliding load-reducing unit includes a first fixing block fixedly connected to the back plate, a second elastic element fixedly connected to the side wall of the first fixing block, a second slider fixedly connected to the other end of the second elastic element, and a second guide rail slidably connected to both sides of the second slider, with the second guide rail fixed along the length direction of the back plate.

[0017] A connector is rotatably connected to the side wall of the second slider, and a rocker arm is slidably connected inside the connector. The other end of the rocker arm is rotatably connected to the back plate, and a third slider is sleeved on the outer surface of the rocker arm.

[0018] Furthermore, the third slider is rotatably connected to the first slider.

[0019] The present invention has at least the following beneficial effects:

[0020] This invention, through the cooperation of a limiting rod, hook, balancing component, and connecting rod component, can automatically adjust the system stiffness according to changes in load weight, resulting in a better phase difference in the output and thus reducing the maximum impact load on the human body. It is simple to operate and convenient to use.

[0021] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is an exploded view of the overall structure of the present invention;

[0024] Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle;

[0025] Figure 4 This is a front view schematic diagram of the sliding load-reducing unit structure of the present invention;

[0026] Figure 5 This is a front view schematic diagram of the balancing component structure of the present invention;

[0027] Figure 6 This is a schematic diagram illustrating the stiffness adjustment principle of the system of the present invention.

[0028] Figure label:

[0029] 1. Backplate; 2. Trolley; 3. Fixed frame; 4. Load plate; 5. Hook; 6. Limiting rod; 7. Linkage assembly; 71. First link; 72. Second link; 8. Balancing assembly; 81. First slider; 82. First elastic element; 83. First guide rail; 84. Second fixing block; 9. Sliding load reduction unit; 91. First fixing block; 92. Second elastic element; 93. Second slider; 94. Second guide rail; 95. Adapter; 96. Swing rod; 97. Third slider; 10. Shoulder strap; 11. Load bag; 12. Slide groove; 13. Arc groove; 14. Square groove; 15. Secondary steel rope; 16. Main steel rope; 17. Pull ring. Detailed Implementation

[0030] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0031] Please see Figure 1-6 The present invention provides a technical solution: a load-reducing suspension backpack with automatic adjustment system stiffness, including a back plate 1, a plurality of trolleys 2 fixedly connected to the back plate 1, a fixed frame 3 slidably connected to the trolleys 2, a load plate 4 installed on the fixed frame 3, a hook 5 slidably connected to the side wall of the load plate 4, and a plurality of limiting rods 6 for limiting the hook 5 installed on the load plate 4.

[0032] One end of the hook 5 is rotatably connected to a connecting rod assembly 7, and a balancing assembly 8 is installed on the connecting rod assembly 7;

[0033] A sliding load-reducing unit 9 is installed on the side of the back plate 1 facing the load plate 4, and the balancing component 8 acts on the sliding load-reducing unit 9.

[0034] The back panel 1 is equipped with a carrying strap 10 for binding to the human body, and the hook 5 is fixed with a load bag 11 by a restraint strap. The load bag 11 is used to bear the load weight.

[0035] Regarding the technical solution of this application, such as Figure 2 As shown, there are four trolleys 2, which are fixed to the back plate 1 in a rectangular shape. The fixed frame 3 is provided with a sliding groove 12 that is compatible with the trolleys 2. In actual use, as the user moves, the load plate 4 will move up and down on the trolleys 2 together with the fixed frame 3. It should be noted that the sliding groove 12 and the trolleys 2 are mutually limited, and the trolleys 2 will not detach from the sliding groove 12 when the fixed frame 3 moves.

[0036] There are two hooks 5. The load plate 4 has an arc-shaped groove 13 that matches the hooks 5. The two arc-shaped grooves 13 are arranged symmetrically on the left and right sides, and the two hooks 5 can move within the two arc-shaped grooves 13.

[0037] Furthermore, such as Figure 2 and Figure 3 As shown, a square groove 14 is formed on the side wall of the load plate 4 above the arc groove 13, and the square groove 14 and the arc groove 13 are interconnected to form a storage channel. Multiple limiting rods 6 are evenly arranged in the storage channel, and the top of each limiting rod 6 is fixedly connected to a secondary steel rope 15. The top of each secondary steel rope 15 is fixed to a main steel rope 16. The main steel rope 16 passes through the side wall of the square groove 14, and the free end of the main steel rope 16 is fixedly connected to a pull ring 17. In actual use, by pulling... The movable pull ring 17 drives the main steel rope 16 to move, thereby pulling multiple auxiliary steel ropes 15 to move upward, which in turn drives multiple limit rods 6 to move upward simultaneously. When the limit rods 6 continue to move upward along the storage channel and disengage from the hook 5, the hook 5 can be unlocked. At this time, the hook 5 can move left and right within the arc groove 13. After the pull ring 17 is released, the multiple limit rods 6 will move downward under the action of gravity, which will cause the multiple limit rods 6 to be locked on both sides of the hook 5, thereby limiting and fixing the hook 5.

[0038] It should be noted that, as Figure 4As shown, the linkage assembly 7 includes a first linkage 71 rotatably connected to the hook 5, the other end of the first linkage 71 rotatably connected to the load plate 4, and the connection point between the first linkage 71 and the load plate 4 is the center point of the arc groove 13. The end of the first linkage 71 near the hook 5 is rotatably connected to a second linkage 72. When the hook 5 moves in the arc groove 13, it will cause the first linkage 71 and the second linkage 72 to deflect. When the second linkage 72 deflects, it will cause the balance assembly 8 to make adaptive adjustments, thereby achieving a new balance.

[0039] Furthermore, the balancing assembly 8 includes a first slider 81 rotatably connected to the free end of the second link 72, a first elastic element 82 fixedly connected to the side wall of the first slider 81, and a first guide rail 83 slidably connected to the bottom of the first slider 81, and the first guide rail 83 is fixed along the width direction of the load plate 4.

[0040] Furthermore, a second fixing block 84 is fixedly connected to the end of the first elastic element 82 away from the first slider 81, and the second fixing block 84 is fixedly connected to the load plate 4. When the second connecting rod 72 deflects, it will drive the first slider 81 to move on the first guide rail 83, thereby driving the first elastic element 82 to perform telescopic transformation, so that the tension generated by the first elastic element 82 is balanced with the gravity of the load.

[0041] The sliding load-reducing unit 9 includes a first fixing block 91 fixedly connected to the back plate 1. A second elastic member 92 is fixedly connected to the side wall of the first fixing block 91. A second slider 93 is fixedly connected to the other end of the second elastic member 92. A second guide rail 94 is slidably connected to both sides of the second slider 93. The second guide rail 94 is made of graphite material and is fixed along the length of the back plate 1. A connector 95 is rotatably connected to the side wall of the second slider 93. A rocker arm 96 is slidably connected inside the connector 95. The other end of the rocker arm 96 is rotatably connected to the back plate 1. A third slider 97 is sleeved on the outer surface of the rocker arm 96 through a linear bearing. The third slider 97 is rotatably connected to the first slider 81.

[0042] Furthermore, as the third slider 97 moves on the rocker arm 96, the closer it is to the rotation point of the rocker arm 96, the stronger the overall rigidity of the system.

[0043] like Figure 6 As shown, the weight of the load acts on the third slider through the mechanism of the load plate. According to Newtonian mechanics and the principle of similar triangles, the equivalent stiffness of the current system can be obtained as:

[0044]

[0045] The value of d2 is fixed. When the third slider 97 moves to the left, d1 decreases, and the equivalent stiffness of the system increases.

[0046] Specifically, when the second connecting rod 72 deflects and drives the first slider 81 to move, since the first slider 81 and the third slider 97 are rotatably connected, the third slider 97 will also move on the swing arm 96. When the balancing component 8 reaches balance, the limiting rod 6 will limit the position of the hook 5. Therefore, the second connecting rod 72 and the first slider 81 will also be limited in position, so that the position of the third slider 97 on the swing arm 96 is relatively fixed. At this time, when the load pack 11, the load plate 4 and the fixed frame 3 move on the trolley 2, they will drive the third slider 97 to move in the vertical direction, thereby driving the swing arm 96 to deflect up and down. When the swing arm 96 deflects, it will drive the second slider 93 to move up and down on the second guide rail 94, thereby stretching or compressing the second elastic element 92, which can keep the load pack 11 stable and achieve the effect of reducing the load.

[0047] The operating principle and process of this invention are as follows: When the weight of the load pack 11 changes and the system stiffness needs to be adjusted, the pull ring 17 is pulled first to move the main steel rope 16. The main steel rope 16 will pull multiple auxiliary steel ropes 15 upward, thereby moving multiple limit rods 6 upward simultaneously. When the limit rods 6 continue to move upward along the storage channel and disengage from the hook 5, the hook 5 can be unlocked. At this time, the hook 5 will move left and right within the arc groove 13. When the hook 5 moves within the arc groove 13, it will cause the first connecting rod 71 and the second connecting rod 72 to deflect. When the second connecting rod 72 deflects, it will cause the first slider 81 to move on the first guide rail 83, thereby causing the first elastic element 8 to move. 2. The telescopic transformation is performed so that the tension generated by the first elastic element 82 is balanced with the weight of the load. When the second connecting rod 72 deflects and drives the first slider 81 to move, it will also drive the third slider 97 to move on the swing rod 96. After the balance is reached, the pull ring 17 is released so that the limiting rod 6 limits the position of the hook 5. Therefore, the second connecting rod 72 and the first slider 81 will also be limited in position, so that the position of the third slider 97 on the swing rod 96 is relatively fixed. In this way, the overall stiffness of the system can be adjusted. Then, by the reciprocating motion of the fixed frame 3 and the load pack 11 relative to the back plate 1, the second elastic element 92 is stretched or compressed, so as to realize the load reduction function.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances. When an element is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another element, it may be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0051] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A load-bearing suspension backpack with automatic adjustment system stiffness, comprising a back panel (1), characterized in that, Multiple trolleys (2) are fixedly connected to the back plate (1), a fixed frame (3) is slidably connected to the trolleys (2), a load plate (4) is installed on the fixed frame (3), a hook (5) is slidably connected to the side wall of the load plate (4), and multiple limiting rods (6) for limiting the hook (5) are installed on the load plate (4). One end of the hook (5) is rotatably connected to a connecting rod assembly (7), and a balancing assembly (8) is installed on the connecting rod assembly (7); A sliding load-reducing unit (9) is installed on the side of the back plate (1) facing the load plate (4), and the balancing component (8) acts on the sliding load-reducing unit (9); The number of hooks (5) is two, and the load plate (4) is provided with an arc-shaped groove (13) that is compatible with the hooks (5); The connecting rod assembly (7) includes a first connecting rod (71) rotatably connected to the hook (5), the other end of the first connecting rod (71) being rotatably connected to the load plate (4), and the connection point between the first connecting rod (71) and the load plate (4) being the center point of the arc groove (13); The first connecting rod (71) is rotatably connected to the second connecting rod (72) at the end near the hook (5); The balancing assembly (8) includes a first slider (81) rotatably connected to the free end of the second connecting rod (72), a first elastic element (82) is fixedly connected to the side wall of the first slider (81), and a first guide rail (83) is slidably connected to the bottom of the first slider (81), and the first guide rail (83) is fixed along the width direction of the load plate (4). The sliding load-reducing unit (9) includes a first fixing block (91) fixedly connected to the back plate (1), a second elastic element (92) fixedly connected to the side wall of the first fixing block (91), a second slider (93) fixedly connected to the other end of the second elastic element (92), and a second guide rail (94) slidably connected to both sides of the second slider (93). The second guide rail (94) is fixed along the length direction of the back plate (1). A connector (95) is rotatably connected to the side wall of the second slider (93), and a rocker arm (96) is slidably connected inside the connector (95). The other end of the rocker arm (96) is rotatably connected to the back plate (1), and a third slider (97) is sleeved on the outer surface of the rocker arm (96). The third slider (97) is rotatably connected to the first slider (81).

2. The weight-reducing suspension backpack with automatic system stiffness adjustment according to claim 1, characterized in that: The back panel (1) is equipped with a shoulder strap (10), and a load bag (11) is fixedly connected to the hook (5).

3. A load-bearing suspension backpack with automatic system stiffness adjustment according to claim 2, characterized in that: The number of the pulleys (2) is four, and the four pulleys (2) are arranged in a rectangular shape. The fixed frame (3) is provided with a groove (12) that is compatible with the pulleys (2).

4. A load-bearing suspension backpack with automatic system stiffness adjustment according to claim 3, characterized in that: The load plate (4) has a square groove (14) on its side wall above the arc groove (13), and the square groove (14) and the arc groove (13) are interconnected to form a storage channel, and multiple limiting rods (6) are evenly arranged in the storage channel.

5. A load-bearing suspension backpack with automatic system stiffness adjustment according to claim 4, characterized in that: The top of each of the multiple limiting rods (6) is fixedly connected to a secondary steel rope (15), and the top of each of the multiple secondary steel ropes (15) is fixed to a main steel rope (16). The main steel rope (16) passes through the side wall of the square groove (14), and the free end of the main steel rope (16) is fixedly connected to a pull ring (17).

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