Annular kneecap protector for patella in outdoor sports

Abstract

The invention belongs to the technical field of outdoor sports, particularly relates to an annular kneecap protector for patella in outdoor sports, and aims to solve the technical problem that when thighs and shanks are completely stretched, the shanks and the rear sides of the thighs can be tightened, and physical damage to the skin on the upper sides and the lower sides of knees is easily caused. Comprising a first connecting ring, a first flexible connecting belt, a first flexible fixing belt set, an adjusting assembly, a second connecting ring, a second flexible connecting belt, a second flexible fixing belt set, a flexible kneecap belt and air holes, the first flexible connecting belt is fixedly installed at one end of the first connecting ring, and the adjusting assembly changes in a self-adaptive mode and is used for supplementing relative position changes; when the thigh and the shank are completely stretched, the self-adaptive length of the adjusting assembly is increased to reach the limit position, so that the connecting ring I and the connecting ring II cannot tighten the shank and the rear side of the thigh, and physical damage to the skin on the upper side and the lower side of the knee is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of outdoor sports, and particularly relates to an outdoor sports patellar circular knee protector. Background Art

[0002] Patent Application No. CN202411432758.2 discloses an intelligent knee protector for improving knee hyperextension, including a wrist guard belt. A connecting piece is fixed on the outer part of the wrist guard belt, and an installation mechanism is installed on the outer wall of the wrist guard belt. Through the cooperation of structures such as a connecting seat, a limiting post, and a limiting disc, etc., but the disadvantage of this technical solution is that when the thigh and calf are fully extended, it will tighten the back sides of the calf and thigh, and it is easy to cause physical damage to the skin on the upper and lower sides of the knee. Summary of the Invention

[0003] The purpose of the present invention is to provide an outdoor sports patellar circular knee protector to solve the technical problem that when the thigh and calf are fully extended, it will tighten the back sides of the calf and thigh, and it is easy to cause physical damage to the skin on the upper and lower sides of the knee.

[0004] To achieve the above purpose, the specific technical solution of an outdoor sports patellar circular knee protector of the present invention is as follows:

[0005] An outdoor sports patellar circular knee protector includes a connecting ring one, a flexible connecting belt one, a flexible fixing belt group one, an adjusting component, a connecting ring two, a flexible connecting belt two, a flexible fixing belt group two, a flexible knee belt, and ventilation holes. One end of the connecting ring one is fixedly installed with the flexible connecting belt one, the other end of the connecting ring one is fixedly installed with the flexible fixing belt group one, the flexible fixing belt group one is clamped with the flexible connecting belt one, the connecting ring one is connected to one end of the flexible knee belt, the other end of the flexible knee belt is connected to the connecting ring two, one end of the connecting ring two is installed with the flexible connecting belt two, the other end of the connecting ring two is installed with the flexible fixing belt group two, the flexible fixing belt group two is clamped with the flexible connecting belt two, and an adjusting component is installed between the flexible fixing belt group one and the flexible fixing belt group two.

[0006] Among them, the flexible knee belt is made of an elastic material, and ventilation holes are opened on the flexible knee belt to facilitate knee ventilation.

[0007] Among them, the first flexible fixing belt group includes a first flexible fixing belt, a first connecting frame, a first pressing carriage, a first spring, a first limiting post, a second limiting post, a first chamber, and a first boss. A first connecting frame is fixedly installed on the first flexible fixing belt. A first chamber for conveniently inserting a first flexible connecting belt is opened in the first connecting frame. A first pressing carriage is slidably installed in the first connecting frame. A first spring is arranged between the first pressing carriage and the first connecting frame. A first limiting post is installed on the first connecting frame, and a second limiting post is installed on the first pressing carriage. The second limiting post and the first limiting post limit both ends of the first spring. A first boss is arranged on the first pressing carriage. The first flexible connecting belt is provided with a plurality of mating grooves A, and the mating grooves A can cooperate with the first boss.

[0008] Among them, the first spring is in a compressed state.

[0009] Among them, the second flexible fixing belt group includes a second flexible fixing belt, a second connecting frame, a second pressing carriage, a second spring, a third limiting post, a fourth limiting post, a second chamber, and a second boss. A second connecting frame is fixedly installed on the second flexible fixing belt. A second chamber for conveniently inserting a second flexible connecting belt is opened in the second connecting frame. A second pressing carriage is slidably installed in the second connecting frame. A second spring is arranged between the second pressing carriage and the second connecting frame. A third limiting post is installed on the second connecting frame, and a second limiting post is installed on the second pressing carriage. The second limiting post and the third limiting post limit both ends of the second spring. A second boss is arranged on the second pressing carriage. The second flexible connecting belt is provided with a plurality of mating grooves B, and the mating grooves B can cooperate with the second boss.

[0010] Among them, the second spring is in a compressed state.

[0011] Among them, the adjusting assembly includes a middle-end sleeve, a fixing plate, a torsion spring, a rotating plate, an upper connecting rod, a lower connecting rod, a first mounting block, a mating gear, a rotating column, and a second mounting block. A fixing plate is fixedly installed on the middle-end sleeve. A second mounting block is installed on the fixing plate. One end of the torsion spring is installed on the second mounting block, and the other end of the torsion spring is installed on the first mounting block. The first mounting block is fixedly installed on the rotating plate. The rotating plate is fixedly installed at one end of the rotating column. The other end of the rotating column is fixedly installed with a mating gear. One end of the mating gear meshes with the upper connecting rod, and the other end of the mating gear meshes with the lower connecting rod. The upper connecting rod and the lower connecting rod are both slidably connected to the middle-end sleeve. The middle-end sleeve is rotatably connected to the rotating column. The upper connecting rod is hingedly installed on the second connecting frame, and the lower connecting rod is hingedly installed on the first connecting frame.

[0012] The advantages of the present invention are as follows:

[0013] 1. When in use, first wrap the connecting ring one around the upper part of the calf, and at the same time place the flexible connecting belt one at the lower part of the thigh, so that the knee part is covered by the flexible knee guard belt. Fix the calf position by the clamping of the flexible connecting belt one and the flexible fixing belt group one, and adjust the tightness of the connecting ring one according to the clamping of the flexible connecting belt one and the flexible fixing belt group one at different positions. At the same time, fix the thigh position by the clamping of the flexible connecting belt two and the flexible fixing belt group two, and adjust the tightness of the connecting ring two according to the clamping of the flexible connecting belt two and the flexible fixing belt group two at different positions. At the same time, as the user moves, the user's knee will bend and stretch from time to time together with the thigh and calf. Therefore, there is a change in the relative distance between the flexible connecting belt one and the flexible connecting belt two. The relative distance becomes shorter when bending and longer when stretching. It can be adaptively changed through the adjusting component to supplement the relative position change. When the thigh and calf are fully stretched, the adjusting component adaptively lengthens to reach the limit position, so that the connecting ring one and the connecting ring two will not tighten the back sides of the calf and thigh, causing physical damage to the skin on the upper and lower sides of the knee. At the same time, through the automatic tightening of the adjusting component, an auxiliary force is provided for the bending of the calf and thigh, making it easier for the calf and thigh to bend back and reducing the exercise fatigue of the user.

[0014] 3. When the flexible connecting belt one is inserted into the chamber one, it is automatically clamped under the action of the spring one. When it is necessary to separate the flexible connecting belt one from the connecting frame one, push the sliding carriage one to make the mating groove A disengage from the boss one, and pull out the flexible connecting belt one outward.

[0015] 4. When the flexible connecting belt two is inserted into the chamber two, it is automatically clamped under the action of the spring two. When it is necessary to separate the flexible connecting belt two from the connecting frame two, push the sliding carriage two to make the mating groove A disengage from the boss two, and pull out the flexible connecting belt two outward.

[0016] 5. When the thigh and calf are stretched, the upper connecting rod and the lower connecting rod move relatively away from each other. The upper connecting rod and the lower connecting rod drive the mating gear to rotate and drive the rotating column and the rotating plate to rotate. The rotating plate twists the torsion spring through the mounting block one so that the torsion spring is torsionally compressed. When the thigh and calf are bent, the elastic force of the torsion spring is released, making the upper connecting rod and the lower connecting rod move relatively closer, providing power for the bending back of the thigh and calf. When the upper connecting rod and the lower connecting rod move relatively away to the maximum value, the torsion spring is in the limit state of torsional compression and cannot be further torsionally compressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention Figure 1 ;

[0018] Figure 2 is a schematic diagram of the overall structure of the present invention Figure 2 ;

[0019] Figure 3 is Figure 1 a schematic diagram of the position of the cutting line;

[0020] Figure 4 is Figure 3 a cross-sectional view along the A-A section;

[0021] Figure 5 is a schematic diagram of the structure of a flexible connection belt of the present invention;

[0022] Figure 6 is a schematic diagram of the structure of a flexible fixing belt group of the present invention;

[0023] Figure 7 is Figure 6 a schematic diagram of the position of the cutting line;

[0024] Figure 8 is Figure 7 a cross-sectional view along the B-B section;

[0025] Figure 9 is a schematic diagram of the structure of a flexible connection belt two of the present invention;

[0026] Figure 10 is a schematic diagram of the structure of a flexible fixing belt group two of the present invention;

[0027] Figure 11 is Figure 10 a schematic diagram of the position of the cutting line;

[0028] Figure 12 is Figure 11 a cross-sectional view along the C-C section;

[0029] Figure 13 is a schematic diagram of the structure of the adjustment component of the present invention Figure 1 ;

[0030] Figure 14 is a schematic diagram of the structure of the adjustment component of the present invention Figure 2 ;

[0031] Figure 15 is a schematic diagram of the structure of the adjustment component of the present invention Figure 3 ;

[0032] Figure 16 is a schematic diagram of the structure of the adjustment component of the present invention Figure 4 ;

[0033] Description of the reference numerals in the figure: connecting ring 1; flexible connecting belt 1 2; flexible fixing belt group 1 3; flexible fixing belt 1 3-1; connecting frame 1 3-2; pressing carriage 1 3-3; spring 1 3-4; limiting post 1 3-5; limiting post 2 3-6; chamber 1 3-7; boss 1 3-8; adjusting assembly 4; middle-end sleeve 4-1; fixing plate 4-2; torsion spring 4-3; rotating plate 4-4; upper connecting rod 4-5; lower connecting rod 4-6; mounting block 1 4-7; mating gear 4-8; rotating column 4-9; mounting block 2 4-10; connecting ring 2 5; flexible connecting belt 2 6; flexible fixing belt group 2 7; flexible fixing belt 2 7-1; connecting frame 2 7-2; pressing carriage 2 7-3; spring 2 7-4; limiting post 3 7-5; limiting post 4 7-6; chamber 2 7-7; boss 2 7-8; flexible knee guard belt 8; ventilation hole 9. Detailed implementation mode

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0036] Embodiment 1

[0037] As Figures 1-4As shown in the figure, an outdoor sports patella circular knee protector includes a first connecting ring 1, a first flexible connecting band 2, a first flexible fixing band group 3, an adjusting component 4, a second connecting ring 5, a second flexible connecting band 6, a second flexible fixing band group 7, a flexible knee band 8, and ventilation holes 9. One end of the first connecting ring 1 is fixedly installed with the first flexible connecting band 2, and the other end of the first connecting ring 1 is fixedly installed with the first flexible fixing band group 3. The first flexible fixing band group 3 is clamped with the first flexible connecting band 2. The first connecting ring 1 is connected to one end of the flexible knee band 8, and the other end of the flexible knee band 8 is connected to the second connecting ring 5. One end of the second connecting ring 5 is installed with the second flexible connecting band 6, and the other end of the second connecting ring 5 is installed with the second flexible fixing band group 7. The second flexible fixing band group 7 is clamped with the second flexible connecting band 6. An adjusting component 4 is installed between the first flexible fixing band group 3 and the second flexible fixing band group 7. With such a setting, when in use, first wrap the first connecting ring 1 around the upper part of the calf, and at the same time place the first flexible connecting band 2 at the lower part of the thigh, so that the knee part is covered by the flexible knee band 8. The fixation of the calf position is achieved through the clamping of the first flexible connecting band 2 and the first flexible fixing band group 3, and the tightness of the first connecting ring 1 is adjusted according to the clamping of the first flexible connecting band 2 and the first flexible fixing band group 3 at different positions. At the same time, the fixation of the thigh position is achieved through the clamping of the second flexible connecting band 6 and the second flexible fixing band group 7, and the tightness of the second connecting ring 5 is adjusted according to the clamping of the second flexible connecting band 6 and the second flexible fixing band group 7 at different positions. At the same time, as the user moves, the user's knee will bend and stretch from time to time together with the thigh and calf parts. Therefore, there is a change in the relative distance between the first flexible connecting band 2 and the second flexible connecting band 6. The relative distance becomes shorter when bending and longer when stretching. It can be adaptively changed through the adjusting component 4 to supplement the relative position change. When the thigh and calf parts are fully stretched, the length of the adjusting component 4 adaptively becomes longer to reach the limit position, so that the first connecting ring 1 and the second connecting ring 5 will not tighten the back sides of the calf and thigh, causing physical damage to the skin on the upper and lower sides of the knee. At the same time, through the automatic tightening of the adjusting component 4, an auxiliary force is provided for the bending of the calf and thigh, making it easier for the calf and thigh to bend back and reducing the exercise fatigue of the user.

[0038] Among them, the flexible knee band 8 is made of an elastic material, and ventilation holes 9 are provided on the flexible knee band 8 to facilitate knee ventilation.

[0039] Embodiment 2

[0040] Such as Figures 5-8As shown, the flexible fixing belt group 1-3 includes a flexible fixing belt 1-3-1, a connecting frame 1-3-2, a pressing carriage 1-3-3, a spring 1-3-4, a limiting post 1-3-5, a limiting post 2-3-6, a chamber 1-3-7, and a boss 1-3-8. A connecting frame 1-3-2 is fixedly installed on the flexible fixing belt 1-3-1. A chamber 1-3-7 for conveniently inserting the flexible connecting belt 1-2 is formed in the connecting frame 1-3-2. A pressing carriage 1-3-3 is slidably installed in the connecting frame 1-3-2. A spring 1-3-4 is arranged between the pressing carriage 1-3-3 and the connecting frame 1-3-2. A limiting post 1-3-5 is installed on the connecting frame 1-3-2, and a limiting post 2-3-6 is installed on the pressing carriage 1-3-3. The two ends of the spring 1-3-4 are limited by the limiting post 2-3-6 and the limiting post 1-3-5. A boss 1-3-8 is arranged on the pressing carriage 1-3-3. The flexible connecting belt 1-2 is provided with a plurality of mating grooves A, and the mating grooves A can cooperate with the boss 1-3-8. With such an arrangement, when the flexible connecting belt 1-2 is inserted into the chamber 1-3-7, under the action of the spring 1-3-4, the flexible connecting belt 1-2 is automatically clamped. When it is necessary to separate the flexible connecting belt 1-2 from the connecting frame 1-3-2, the pressing carriage 1-3-3 is pushed to make the mating groove A disengage from the boss 1-3-8, and the flexible connecting belt 1-2 is pulled outwards.

[0041] Among them, the spring 1-3-4 is in a compressed state.

[0042] Embodiment 3

[0043] As Figures 9-12 shown, the flexible fixing belt group 2-7 includes a flexible fixing belt 2-7-1, a connecting frame 2-7-2, a pressing carriage 2-7-3, a spring 2-7-4, a limiting post 3-7-5, a limiting post 4-7-6, a chamber 2-7-7, and a boss 2-7-8. A connecting frame 2-7-2 is fixedly installed on the flexible fixing belt 2-7-1. A chamber 2-7-7 for conveniently inserting the flexible connecting belt 2-5 is formed in the connecting frame 2-7-2. A pressing carriage 2-7-3 is slidably installed in the connecting frame 2-7-2. A spring 2-7-4 is arranged between the pressing carriage 2-7-3 and the connecting frame 2-7-2. A limiting post 3-7-5 is installed on the connecting frame 2-7-2, and a limiting post 2-7-6 is installed on the pressing carriage 2-7-3. The two ends of the spring 2-7-4 are limited by the limiting post 2-7-6 and the limiting post 3-7-5. A boss 2-7-8 is arranged on the pressing carriage 2-7-3. The flexible connecting belt 2-5 is provided with a plurality of mating grooves B, and the mating grooves B can cooperate with the boss 2-7-8. With such an arrangement, when the flexible connecting belt 2-5 is inserted into the chamber 2-7-7, under the action of the spring 2-7-4, the flexible connecting belt 2-5 is automatically clamped. When it is necessary to separate the flexible connecting belt 2-5 from the connecting frame 2-7-2, the pressing carriage 2-7-3 is pushed to make the mating groove A disengage from the boss 2-7-8, and the flexible connecting belt 2-5 is pulled outwards.

[0044] Among them, the spring 2-7-4 is in a compressed state.

[0045] Example 4

[0046] As Figures 13-16 shown, the adjustment assembly 4 includes a middle-end sleeve 4-1, a fixing plate 4-2, a torsion spring 4-3, a rotating plate 4-4, an upper connecting rod 4-5, a lower connecting rod 4-6, a first mounting block 4-7, a mating gear 4-8, a rotating column 4-9, and a second mounting block 4-10. The fixing plate 4-2 is fixedly mounted on the middle-end sleeve 4-1. The second mounting block 4-10 is mounted on the fixing plate 4-2. One end of the torsion spring 4-3 is mounted on the second mounting block 4-10, and the other end of the torsion spring 4-3 is mounted on the first mounting block 4-7. The first mounting block 4-7 is fixedly mounted on the rotating plate 4-4. The rotating plate 4-4 is fixedly mounted on one end of the rotating column 4-9. The other end of the rotating column 4-9 is fixedly mounted with the mating gear 4-8. One end of the mating gear 4-8 meshes with the upper connecting rod 4-5, and the other end of the mating gear 4-8 meshes with the lower connecting rod 4-6. The upper connecting rod 4-5 and the lower connecting rod 4-6 are both slidably connected to the middle-end sleeve 4-1. The middle-end sleeve 4-1 is rotatably connected to the rotating column 4-9. The upper connecting rod 4-5 is hingedly mounted on the second connecting frame 7-2, and the lower connecting rod 4-6 is hingedly mounted on the first connecting frame 3-2. Thus, when the thigh and the calf are stretched, the upper connecting rod 4-5 and the lower connecting rod 4-6 move relatively away from each other. The upper connecting rod 4-5 and the lower connecting rod 4-6 drive the mating gear 4-8 to rotate and drive the rotating column 4-9 and the rotating plate 4-4 to rotate. The rotating plate 4-4 twists the torsion spring 4-3 through the first mounting block 4-7 so that the torsion spring 4-3 is torsionally compressed. When the thigh and the calf are bent, the elastic force of the torsion spring 4-3 is released, causing the upper connecting rod 4-5 and the lower connecting rod 4-6 to move relatively closer, providing power for the bending back of the thigh and the calf. When the upper connecting rod 4-5 and the lower connecting rod 4-6 move relatively away from each other to the maximum value, the torsion spring 4-3 is in the limit state of torsional compression and cannot be further torsionally compressed.

[0047] It can be understood that the present invention is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present invention, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A patella ring-shaped knee protector for outdoor sports, characterized in that: The invention comprises a connecting ring 1 (1), a flexible connecting belt 1 (2), a flexible fixing belt group 1 (3), an adjusting component (4), a connecting ring 2 (5), a flexible connecting belt 2 (6), a flexible fixing belt group 2 (7), a flexible knee pad (8), and a vent hole (9). The connecting ring 1 (1) is fixedly mounted with the flexible connecting belt 1 (2) at one end, the connecting ring 1 (1) is fixedly mounted with the flexible fixing belt group 1 (3) at the other end, the flexible fixing belt group 1 (3) is snap-connected with the flexible connecting belt 1 (2), the connecting ring 1 (1) is connected to one end of the flexible knee pad (8), the other end of the flexible knee pad (8) is connected to the connecting ring 2 (5), the flexible connecting belt 2 (6) is mounted at one end of the connecting ring 2 (5), the flexible fixing belt group 2 (7) is mounted at the other end of the connecting ring 2 (5), the flexible fixing belt group 2 (7) is snap-connected with the flexible connecting belt 2 (6), and the adjusting component (4) is mounted between the flexible fixing belt group 1 (3) and the flexible fixing belt group 2 (7).

2. The outdoor sports patella ring-shaped knee brace according to claim 1, characterized in that: The flexible knee pad (8) is made of elastic material and is provided with ventilation holes (9) to facilitate ventilation of the knee.

3. The outdoor sports patella ring-shaped knee brace according to claim 1, characterized in that: The flexible fixing belt assembly (3) comprises a flexible fixing belt (3-1), a connecting frame (3-2), a pressing slide (3-3), a spring (3-4), a limiting column (3-5), a limiting column (3-6), a chamber (3-7), and a boss (3-8). The flexible fixing belt (3-1) is fixedly mounted with a connecting frame (3-2). The connecting frame (3-2) is provided with a chamber (3-7) for conveniently inserting the flexible connecting belt (2). The connecting frame (3-2) is slidably mounted with a pressing slide (3-3). A spring (3-4) is arranged between the push slide (3-3) and the connecting frame (3-2), a limiting column (3-5) is installed on the connecting frame (3-2), a limiting column (3-6) is installed on the push slide (3-3), the limiting column (3-6) and the limiting column (3-5) limit the two ends of the spring (3-4), a boss (3-8) is arranged on the push slide (3-3), a matching groove A is opened on the flexible connecting belt (2), and a plurality of matching grooves A are arranged, and the matching grooves A can match with the boss (3-8).

4. The outdoor sports patella ring-shaped knee brace according to claim 3, characterized in that: The spring 1 (3-4) is in a compressed state.

5. The outdoor sports patella ring-shaped knee brace according to claim 1, characterized in that: The flexible fixing belt set 2 (7) comprises a flexible fixing belt 2 (7-1), a connecting frame 2 (7-2), a pressing slide 2 (7-3), a spring 2 (7-4), a limiting column 3 (7-5), a limiting column 4 (7-6), a chamber 2 (7-7), and a boss 2 (7-8). The flexible fixing belt 2 (7-1) is fixedly mounted with a connecting frame 2 (7-2). A chamber 2 (7-7) for conveniently inserting the flexible connecting belt 2 (5) is opened in the connecting frame 2 (7-2). The pressing slide 2 (7-3) is slidably mounted on the connecting frame 2 (7-2). A spring 2 (7-4) is arranged between the push slide 2 (7-3) and the connecting frame 2 (7-2), a limiting column 3 (7-5) is installed on the connecting frame 2 (7-2), a limiting column 2 (7-6) is installed on the push slide 2 (7-3), the limiting column 2 (7-6) and the limiting column 3 (7-5) limit the two ends of the spring 2 (7-4), the push slide 2 (7-3) is provided with a boss 2 (7-8), the flexible connecting belt 2 (5) is provided with a matching groove B, and a plurality of matching grooves B are provided, and the matching grooves B can be matched with the boss 2 (7-8).

6. The outdoor sports patella ring-shaped knee brace according to claim 4, characterized in that: The spring 2 (7-4) is in a compressed state.

7. The outdoor sports patella ring-shaped knee brace according to claim 3 or 5, characterized in that: The adjusting assembly (4) comprises a middle end sleeve (4-1), a fixed plate (4-2), a torsion spring (4-3), a rotating plate (4-4), an upper connecting rod (4-5), a lower connecting rod (4-6), a first mounting block (4-7), a matching gear (4-8), a rotating column (4-9), and a second mounting block (4-10). The middle end sleeve (4-1) is fixedly mounted with the fixed plate (4-2), the second mounting block (4-10) is mounted on the fixed plate (4-2), the second mounting block (4-10) is mounted on one end of the torsion spring (4-3), the other end of the torsion spring (4-3) is mounted on the first mounting block (4-7), and the first mounting block (4-7) is fixedly mounted on the fixing plate (4-2). The rotating plate (4-4) is fixedly mounted on one end of a rotating column (4-9), and a matching gear (4-8) is fixedly mounted on the other end of the rotating column (4-9). One end of the matching gear (4-8) is meshed with an upper connecting rod (4-5), and the other end of the matching gear (4-8) is meshed with a lower connecting rod (4-6). The upper connecting rod (4-5) and the lower connecting rod (4-6) are simultaneously slidably connected to a middle end sleeve (4-1), and the middle end sleeve (4-1) is rotationally connected to the rotating column (4-9). The upper connecting rod (4-5) is hingedly mounted on a second connecting frame (7-2), and the lower connecting rod (4-6) is hingedly mounted on a first connecting frame (3-2).

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