CN219963872U

CN219963872U - Exercise assisting device

Info

Publication number: CN219963872U
Application number: CN202321272668.2U
Authority: CN
Inventors: 赵景晓
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-11-07
Anticipated expiration: 2033-05-24

Abstract

The utility model discloses an exercise assisting device, which belongs to the field of exercise devices and is used for assisting exercise, wherein one end of a horizontal support is provided with the horizontal support, a horizontal adjusting plate which is fixedly adjusted in a sliding way is arranged on the horizontal support, a seat body shell is arranged on the horizontal adjusting plate, a seat body pressing block which moves relative to the seat body shell is connected inside the seat body shell through a return spring, and two sides of the seat body pressing block are connected with the seat body shell through a seat body guide structure; the inside of vertical support is provided with the box that resets, and the inside of box that resets is connected with fixed straight arm through reset structure, bearing frame, is connected with on the fixed straight arm and adjusts straight arm, is fixed with the clamp plate pedestal on the adjusting straight arm, contacts with the top surface of pedestal briquetting and pushes down the pedestal briquetting when clamp plate pedestal moves down. The utility model can overcome the defects of the prior art, has continuous and variable acting force, is stable and reliable to use, has good practicability for different people and is convenient to store.

Description

Exercise assisting device

Technical Field

The utility model belongs to the field of exercise devices, and particularly relates to an exercise assisting device.

Background

When people work for a long time and with high strength, or maintain bad body position and posture for a long time, diseases related to the spine such as spine injury, lumbar muscle strain or lumbar disc herniation are easy to cause, so that the function of the spine serving as a body core area is influenced, and a plurality of inconveniences are brought to life and work of people. The traditional rehabilitation training has long time and high cost, and needs to use specific rehabilitation instruments in specific occasions, and the rehabilitation training adopts the traction mode, so that the problem of secondary damage to the spine caused by improper operation can be caused by passive secondary traction.

To solve the above-mentioned technical problem, patent document CN208244027U discloses a body-building booster, which can implement exercise on the spine, tail and knee joints by setting a booster rod, and adopting a rotatable connection mode between one end of the booster rod and a panel, and by setting a hip pad at the free end of the booster rod, a user can make the user perform arc-shaped movement in a plane perpendicular to the vertical panel by applying force to the hip pad, relying on the autonomous movement of the user.

However, in practical use, the technical solutions disclosed in the patent document CN208244027U have the following problems that need to be improved:

firstly, the counterweight form of the counterweight block is adopted, and the purpose of adjusting the acting force can be achieved by increasing or decreasing the number of the counterweight block, but once the number of the counterweight block is determined, the acting force provided by the counterweight block is relatively constant, and the use requirement of flexible and continuously-changing stress cannot be met.

Secondly, the vertical rod and the horizontal rod adopted by the sliding rod are integrally formed or formed by bending steel pipes, and act on one side of the upper sliding rod, namely acting force is applied to one side of the upper sliding rod, so that uneven stress on two sides of the upper sliding rod is easily caused, and abrasion is increased.

And thirdly, when the support seat is used, the buffer seat of the support seat and the base at the bottom adopt the action mode of the buffer spring, and the buffer seat and the base are easy to swing left and right due to the processing errors of the base and the buffer seat in the up-and-down movement process, so that the movement stability of the base and the buffer seat is poor, and the abrasion between the base and the buffer seat is aggravated.

Fourth, cupboard is fixed relatively, can't realize the adaptability to different crowds with cooperation such as helping hand pole, supporting seat and adjust.

Disclosure of Invention

The utility model aims to provide an exercise assisting device which can overcome the defects of the prior art, has continuously variable acting force and stable and reliable use, has good practicability for different crowds and is convenient to store.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

the utility model relates to an exercise assisting device, which comprises a horizontal bracket, wherein the horizontal bracket is placed on a horizontal base, one end of the horizontal bracket is provided with the horizontal bracket, a horizontal adjusting plate which is fixedly adjusted in a sliding way is arranged on the horizontal bracket, a seat body shell is arranged on the horizontal adjusting plate, a seat body pressing block which moves relative to the seat body shell is connected inside the seat body shell through a reset spring, and two sides of the seat body pressing block are connected with the seat body shell through seat body guide structures; the inside of vertical support is provided with the box that resets, and the inside of box that resets is connected with fixed straight arm through reset structure, bearing frame, is connected with on the fixed straight arm and adjusts straight arm, is fixed with the clamp plate pedestal on the adjusting straight arm, contacts with the top surface of pedestal briquetting and pushes down the pedestal briquetting when clamp plate pedestal moves down.

As one of the preferable technical schemes, the horizontal support is horizontally provided with a horizontal adjusting slide rail, and the horizontal adjusting slide rail is connected with the horizontal adjusting plate through a horizontal adjusting slide block.

As one of the preferable technical schemes of the utility model, the horizontal adjusting plate is rotatably connected with a horizontal adjusting rod, the horizontal adjusting rod is connected with a horizontal baffle through a thread structure, and the horizontal baffle is positioned at the end part of the horizontal bracket and is fixedly connected with the horizontal bracket.

As one of the preferable technical schemes of the utility model, the reset box body is a hollow box body, and the reset structure is positioned in the reset box body.

As one of the preferable technical schemes of the utility model, the reset structure comprises a plurality of tension springs connected to the inner bottom surface of the reset box body, the top ends of the tension springs are connected with a traction rope, and the traction rope is wound on a shaft body with a fixed straight arm positioned in the reset box body after bypassing the auxiliary shaft of the box body.

As one of the preferable technical schemes of the utility model, the fixed straight arm is a hollow rod body with a U-shaped structure, and a bearing seat is arranged at the position where the fixed straight arm penetrates through the reset box body; two ends of the adjusting straight arm are correspondingly inserted at two free ends of the fixed straight arm, and are connected with the two ends of the adjusting straight arm through fastening screws; the pressing plate seat body is positioned at the middle position of the adjusting straight arm.

As one of the preferable technical schemes, two sides of the reset box body are respectively connected with the corresponding vertical adjusting sliding rail on the vertical support in a sliding way through the box body sliding blocks; the top end of the reset box body is rotationally connected with a lifting adjusting knob, the lifting adjusting knob penetrates through a support top plate at the top end of the vertical support, and the lifting adjusting knob is in threaded connection with the support top plate at a position penetrating through the support top plate.

As one of the preferable technical schemes of the utility model, the vertical support is also provided with a vertical column, a plurality of vertical column baffles are arranged in the vertical column, and the vertical column baffles are positioned in a space formed by the fixed straight arm and the adjusting straight arm.

As one of the preferable technical schemes of the utility model, the upright posts and the vertical supports are connected in a detachable mode, and the upright post baffle plates are inserted between the adjacent upright posts and limited by the grooves on the upright posts.

As one of the preferable technical schemes, a reset structure arranged in the reset box body is a torsion spring.

As one of the preferable technical schemes of the utility model, the fixed straight arm comprises an inner box body penetrating through the reset box body, a bearing structure is arranged at the position of the inner box body penetrating through the reset box body, the inner box body is connected with the reset structure at the position of the inner box body penetrating through the reset box body, an outer box body is fixedly inserted into the inner box body at the position of the inner box body penetrating through the reset box body, and an adjusting straight arm is fixedly inserted into the end part of the outer box body; the adjusting straight arm is a U-shaped rod body which is fixed and adjusted in a telescopic manner in the width direction and the length direction.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model provides an auxiliary exercise device with continuously variable acting force along with the rotation of the adjusting straight arm and the fixing straight arm around the connecting position by adopting a torsional spring or a traction rope to pull the structural form of the tension spring in the reset box body, so as to overcome the defect that the original device can not realize continuously variable acting force through the counterweight, and further improve the exercise effect.

2. According to the utility model, the seat body guide structure is added between the seat body shell and the seat body pressing block, so that the stability of relative movement of the seat body shell and the pressing block in the process of being matched with the pressing plate seat body is improved, the abrasion between the seat body shell and the pressing block is reduced, and the service life is prolonged. And the seat body shell can realize the regulation and the fixed of horizontal distance relative to the box that resets, adapt to different crowds' user demand.

3. According to the utility model, the reset box body which can be lifted and fixed relative to the horizontal plane is arranged, so that the adaptability and flexibility of the adjusting straight arm and the fixing straight arm to different crowds can be further improved, and the use requirements of different crowds can be met.

4. The detachable upright posts and the upright post baffle plate matched with the upright posts are arranged, so that the novel vertical support can be used in a narrow space and is convenient to assemble quickly, and meanwhile, the novel vertical support is convenient to store in the structure in a mode of connecting the vertical support with the horizontal support through the fastening screw and the connecting plate.

5. According to the utility model, the adjusting straight arm and the fixing straight arm are arranged into the U-shaped structure rod body, the adjustable length is realized through the structure form of splicing and fixing, the use requirements of different people are met, meanwhile, symmetrical acting force can be applied to the structure in the resetting box body, the abrasion caused by single acting force is avoided, and the service life is ensured.

7. According to the utility model, the continuously variable acting force is applied to the user, the situation of original passive acting force and external force traction is overcome by completely depending on the acting force of the user, the rehabilitation of the spine and related parts is realized through the lower limb squatting training, the local blood circulation and the stimulation of local acupuncture points are promoted, the good auxiliary exercise effect is realized, and the rehabilitation is promoted. The utility model has wide application, can be used in home, offices, classrooms and other places, can be conveniently raised after squatting by matching with the reset structure, and is suitable for people with different exercise purposes.

Drawings

Fig. 1 is a perspective view of the present utility model.

Fig. 2 is a partial enlarged view of the portion I in fig. 1.

Fig. 3 is a second perspective view of the present utility model.

Fig. 4 is a schematic view of the internal structure of the reset case of the present utility model.

Fig. 5 is a partial enlarged view of the portion II in fig. 4.

In the figure: 1. a horizontal bracket; 2. horizontally adjusting the sliding rail; 3. a horizontal adjustment slide block; 4. a horizontal adjustment plate; 5. a horizontal adjustment rod; 6. a horizontal baffle; 7. a connecting plate; 8. a housing shell; 9. a base body pressing block; 10. a seat guiding structure; 11. a vertical bracket; 12. vertically adjusting the sliding rail; 13. resetting the box body; 14. a platen base; 15. adjusting the straight arm; 16. fixing the straight arm; 17. a bracket top plate; 18. a column; 19. a column baffle; 20. a box auxiliary shaft; 21. a traction rope; 22. a tension spring; 23. lifting and lowering the adjusting knob; 24. a door panel; 25. and a box body sliding block.

Detailed Description

The technical scheme of the utility model is further described and illustrated below with reference to the accompanying drawings and the embodiments. It should be noted that, the terms possibly related to the following paragraphs include, but are not limited to, "up, down, left, right, front, back" and the like, and the directions according to which the terms are all visual directions shown in the drawings of the corresponding specification, which should not be construed as limiting the scope of protection of the present technical solution, but are only for facilitating the understanding of the technical solution described in the specification by those skilled in the art.

In the description of the following paragraphs, unless expressly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in view of the specific circumstances in combination with common general knowledge in the art, design specifications, standard documents, etc.

Example 1

As shown in fig. 1 to 5, an exercise assisting apparatus comprises a horizontal bracket 1 placed on a horizontal base, wherein the horizontal bracket 1 can be composed of two parallel plates, one end of the horizontal bracket can be connected with a vertical bracket 11 through a connecting plate 7 and a fastening screw, and the other end of the horizontal bracket is connected with a horizontal adjusting slide rail 2.

The horizontal adjusting slide rail 2 is connected with a horizontal adjusting plate 4 through a horizontal adjusting slide block 3, and the horizontal adjusting slide block 3 is positioned at two ends of the horizontal adjusting plate 4 and fixedly connected with the horizontal adjusting plate 4. The top middle part position department fixedly connected with pedestal shell 8 of horizontal adjustment board 4, the inside of pedestal shell 8 is provided with pedestal briquetting 9, is provided with reset spring between pedestal briquetting 9 and the pedestal shell 8 to satisfy pedestal briquetting 9 and move relative pedestal shell 8 when receiving external pressure and can reset to initial position after external force disappears. A seat guiding structure 10 is further arranged between the seat pressing block 9 and the seat shell 8, and the seat guiding structure 10 comprises a sliding rail positioned on the seat shell 8 and a sliding block positioned on the seat pressing block 9. The function of the seat body guiding structure 10 is that when the seat body shell 8 and the seat body pressing block 9 move relatively, the seat body guiding structure moves in the vertical direction more stably and reliably, and abrasion caused by swing between the seat body shell and the seat body pressing block is avoided.

The horizontal adjusting plate 4 realizes the adjustment of the horizontal position through a horizontal adjusting rod 5 rotatably connected with the horizontal adjusting plate. Specifically, the horizontal adjusting rod 5 can rotate around its central axis at the position of connection with the horizontal adjusting plate 4, and the horizontal adjusting rod 5 is further connected with the horizontal baffle 6 at one end far away from the horizontal adjusting plate 4 through a screw structure, and the horizontal baffle 6 is located at the end of the horizontal bracket 1 and fixedly connected with the horizontal bracket 1.

The base press block 9 is contacted with the pressing plate base 14 which moves downwards, the pressing plate base 14 can move downwards under the action of the buttocks, knees and other parts of a user, and can be contacted with the base press block 9 below and apply the downward acting force to the base press block 9 when moving downwards.

The pressing plate seat 14 is located at the middle position of the adjusting straight arm 15, the adjusting straight arm 15 is a U-shaped structure rod body, two ends of the adjusting straight arm 15 are inserted into the fixed straight arm 16, and are connected with the fixed straight arm 16 through adjusting holes and fixing screws.

The fixed straight arm 16 is a rod body with a U-shaped structure, and can be a hollow rod body or at least a hollow structure is processed at the connecting position with the adjusting straight arm 15. The penetrating positions of the fixed straight arm 16 and the reset box 13 are provided with bearing seats or bearing structures. The fixed straight arm 16 is wound with a plurality of traction ropes 21 at the position of the inside of the reset box 13, a plurality of box auxiliary shafts 20 guiding the traction ropes 21 to move can be further arranged inside the reset box 13, and the box auxiliary shafts 20 are positioned above the traction ropes 21 to lift the traction ropes 21 and enable the traction ropes 21 to be connected with tension springs 22 at the bottom. The top of the tension spring 22 is connected with the traction rope 21, and the bottom of the tension spring 22 is connected with the bottom plate of the reset box 13. The opening of the reset box 13 is provided with a door plate 24 with a locking structure.

Two sides of the reset box body 13 are provided with box body sliding blocks 25, and the reset box body 13 is in sliding connection with the corresponding vertical adjusting sliding rail 12 on the vertical support 11 through the box body sliding blocks 25. The vertical support 11 is a frame body with a rectangular frame body structure, and the bottom end of the vertical support 11 can be fixedly connected with the horizontal support 1 or connected through the connecting plate 7, fastening screws or other detachable modes.

The top of vertical support 11 is provided with rather than integrative support roof 17, is connected with lift adjust knob 23 through the helicitic texture on the support roof 17, and the bottom of lift adjust knob 23 rotates and is connected with reset box 13. Under the screwing-in and screwing-out actions of the lifting adjusting knob 23, the reset box 13 can move up and down relative to the vertical support 11 along the vertical adjusting sliding rail 12 through box sliding blocks 25 on two sides, and then the vertical arm 16 and the adjusting arm 15 are fixed in an auxiliary mode to realize height adjustment.

The fixed straight arm 16 comprises an inner box shaft body penetrating through the reset box body 13, a bearing structure is arranged on the inner box shaft body at the position penetrating through the reset box body 13, the inner box shaft body is connected with a reset structure at the position located inside the reset box body 13, an outer box shaft body is fixedly connected to the inner box shaft body at the position penetrating through the reset box body 13 in an inserting mode, and an adjusting straight arm 15 is fixedly connected to the end portion of the outer box shaft body in an inserting mode; the adjusting straight arm 15 is a U-shaped rod body which is telescopically and fixedly adjusted in the width direction and the length direction. The structure can realize the adjustment of the fixed straight arm 16 in the width direction, namely, the fixed straight arm 16 is adjusted in the width direction through the insertion and fixation of the outer box shaft body at different positions of the end part of the inner box shaft body extending out of the reset box body 13. Meanwhile, the adjusting straight arm 15 is a telescopic rod body which can be adjusted in a telescopic mode in the width direction and the length direction, so that the adjusting straight arm is matched with the fixed straight arm 16 to achieve adjustment, and the use requirements of people with different physique are greatly met.

Example 2

As shown in fig. 1 to 5, in an exercise assisting device, upright posts 18 are inserted into the top ends of vertical supports 11, the upright posts 18 are symmetrically arranged on two sides of the vertical supports 11, a plurality of upright post baffles 19 stacked in the vertical direction are arranged between adjacent upright posts 18, and two ends of each upright post baffle 19 are clamped in grooves of each upright post 18. Through the detachable connection of the upright posts 18 and the reset box 13 and the detachable connection of the upright post baffle 19 between the upright posts 18, the multi-part combined structural form, such as clamping connection, pin connection, screw connection and the like, can be used in places with limited space, such as classrooms and the like. The structure and connection relationship of the rest are the same as those described in any one of the foregoing embodiments, and are not repeated here to avoid complicated text.

On the basis of the above embodiments, the technical features involved therein and the functions and roles that the technical features play in the technical solution are described in detail using the following paragraphs so as to help those skilled in the art to fully understand the technical solution and reproduce it.

Referring to fig. 1 to 3, taking hip position use as an example, a user first needs to stand in a space formed by the adjusting straight arm 15, the fixed straight arm 16, the reset box 13, the vertical bracket 11, the upright 18 and the upright baffle 19, that is, a space surrounded by the adjusting straight arm 15 and the fixed straight arm 16. The lifting adjusting knob 23 is adjusted to enable the reset box 13 to lift and adjust the telescopic length of the adjusting straight arm 15 relative to the fixed straight arm 16, so that the pressing plate seat 14 at the initial position is just positioned at the hip position of the user in a standing state. Secondly, through adjusting the horizontal adjusting rod 5 on the horizontal baffle 6, the horizontal adjusting rod 5 can drive the horizontal adjusting plate 4 to slide along the horizontal adjusting sliding rail 2 on the horizontal bracket 1 through the horizontal adjusting sliding block 3, so that the condition that the pressing plate seat 14 can be contacted with the seat pressing block 9 on the horizontal adjusting plate 4 in the falling process is met.

After the adjustment is completed, the user faces the upright post baffle 19 and the upright post 18, and gradually squats down, the hip position of the user can apply force to the pressing plate seat 14 in the squatting process, and the pressing plate seat 14 drives the adjusting straight arm 15 and the fixed straight arm 16 to rotate around the connecting position of the fixed straight arm 16 and the reset box 13.

Referring to fig. 4 and 5, the pulling rope 21 wound on the fixed straight arm 16 is driven to pull the tension spring 22 through the box auxiliary shaft 20 in the rotating process of the fixed straight arm 16, the tension spring 22 deforms due to the fact that the pulling force is received, the tension spring can apply reverse acting force to the pulling rope 21, and further the pulling rope 21 applies reverse acting force to the fixed straight arm 16 and the adjusting straight arm 15, and the pulling rope acts on buttocks of a user through the pressing plate seat 14.

Thus, the user's buttocks receive a reverse force from the tension spring during the downward bending and squatting, and the reverse force can be continuously variable, which continuously increases with the squatting degree of the user.

When the user bends the knee to squat down so that the pressing plate seat 14 contacts with the seat pressing block 9, the seat pressing block 9 can be driven to continuously move downwards, and the seat pressing block 9 overcomes the acting force of the bottom return spring and stably moves downwards with the seat shell 8 through the seat guiding structure 10.

The user stands up step by step upwards, and clamp plate pedestal 14 breaks away from contact with pedestal briquetting 9, and pedestal briquetting 9 takes place relative motion and resets with pedestal shell 8 through pedestal guide structure 10 under reset spring's effect. When the user stands completely, the structures including the pressing plate base 14, the adjusting straight arm 15, the fixing straight arm 16, the tension spring 22 and the like are all reset to the initial positions.

Finally, although the description has been described in terms of embodiments, not every embodiment is intended to include only a single embodiment, and such description is for clarity only, as one skilled in the art will recognize that the embodiments of the disclosure may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides an exercise assisting device, includes horizontal stand (1), vertical support (11), and horizontal stand (1) is placed on horizontal base, is provided with horizontal stand (1) in the one end of horizontal stand (1), its characterized in that: the horizontal support (1) is provided with a horizontal adjusting plate (4) which is fixedly adjusted in a sliding manner, the horizontal adjusting plate (4) is provided with a seat body shell (8), the inside of the seat body shell (8) is connected with a seat body pressing block (9) which moves relative to the seat body shell (8) through a reset spring, and two sides of the seat body pressing block (9) are connected with the seat body shell (8) through seat body guide structures (10); the inside of vertical support (11) is provided with box (13) that resets, and the inside of box (13) that resets is connected with fixed straight arm (16) through reset structure, bearing frame, is connected with on the fixed straight arm (16) and adjusts straight arm (15), is fixed with clamp plate pedestal (14) on adjusting straight arm (15), contacts with the top surface of pedestal briquetting (9) and pushes down pedestal briquetting (9) when clamp plate pedestal (14) move down.

2. An exercise assisting apparatus in accordance with claim 1, wherein: the horizontal support (1) is horizontally provided with a horizontal adjusting slide rail (2), and the horizontal adjusting slide rail (2) is connected with a horizontal adjusting plate (4) through a horizontal adjusting slide block (3).

3. An exercise assisting apparatus in accordance with claim 2, wherein: the horizontal adjusting plate (4) is rotationally connected with a horizontal adjusting rod (5), the horizontal adjusting rod (5) is connected with a horizontal baffle plate (6) through a threaded structure, and the horizontal baffle plate (6) is positioned at the end part of the horizontal support (1) and is fixedly connected with the horizontal support (1).

4. An exercise assisting apparatus in accordance with claim 1, wherein: the reset box body (13) is a hollow box body, and the reset structure is positioned in the reset box body (13).

5. The exercise assisting apparatus in accordance with claim 4, wherein: the reset structure comprises a plurality of tension springs (22) connected to the inner bottom surface of the reset box body (13), the top ends of the tension springs (22) are connected with a traction rope (21), and the traction rope (21) winds around a box body auxiliary shaft (20) and then is positioned on a shaft body of the fixed straight arm (16) inside the reset box body (13).

6. An exercise assisting apparatus in accordance with claim 1, wherein: the fixed straight arm (16) is a hollow rod body with a U-shaped structure, and a bearing seat is arranged at the position where the fixed straight arm (16) penetrates through the reset box body (13); two free ends of the fixed straight arm (16) are correspondingly inserted with two ends of the adjusting straight arm (15), and are connected with two ends of the adjusting straight arm (15) through fastening screws; the pressing plate seat body (14) is positioned at the middle position of the adjusting straight arm (15).

7. An exercise assisting apparatus in accordance with claim 1, wherein: two sides of the reset box body (13) are respectively connected with corresponding vertical adjusting slide rails (12) on the vertical support (11) in a sliding way through box body sliding blocks (25); the top end of the reset box body (13) is rotationally connected with a lifting adjusting knob (23), the lifting adjusting knob (23) penetrates through a support top plate (17) at the top end of the vertical support (11), and the lifting adjusting knob (23) is in threaded connection with the support top plate (17) at a position penetrating through the support top plate (17).

8. An exercise assisting apparatus in accordance with any one of claims 1 to 7, wherein: the vertical support (11) is further provided with a vertical column (18), a plurality of vertical column baffles (19) are arranged in the vertical column (18), and the vertical column (18) and the vertical column baffles (19) are located in a space formed by the fixed straight arm (16) and the adjusting straight arm (15).

9. The exercise assisting apparatus in accordance with claim 8, wherein: the upright posts (18) are detachably connected with the vertical supports (11), and the upright post baffle plates (19) are inserted between the adjacent upright posts (18) and limited by grooves on the upright posts (18).

10. An exercise assisting apparatus in accordance with claim 1, wherein: the fixed straight arm (16) comprises an inner box shaft body penetrating through the reset box body (13), a bearing structure is arranged at the position of the inner box shaft body penetrating through the reset box body (13), the inner box shaft body is connected with the reset structure at the position of the inner box shaft body located in the reset box body (13), an outer box shaft body is fixedly connected to the inner box shaft body in an inserting mode at the position of the inner box shaft body penetrating through the reset box body (13), and an adjusting straight arm (15) is fixedly connected to the end portion of the outer box shaft body in an inserting mode; the adjusting straight arm (15) is a U-shaped rod body which is fixed and adjusted in a telescopic manner in the width direction and the length direction.