Hand rehabilitation training device

Abstract

The invention discloses a hand rehabilitation training device which comprises a bottom plate, a supporting column fixed to the upper end of the bottom plate, a fixing plate used for supporting, a training plate hinged to the right end of the fixing plate, a connecting sleeve fixedly connected to the left end of the fixing plate, and a clamping mechanism arranged at the front end of the fixing plate. And the connecting mechanism is arranged at the rear end of the bottom plate. According to the hand rehabilitation training device, the wrist can be conveniently clamped and limited, slipping between the hand and the device during rehabilitation training is prevented, and therefore the stability in the whole rehabilitation training process can be guaranteed, the training plate rotates at the right end of the fixing plate, automatic flexion and extension training can be conveniently conducted on finger joints, and by combining with the arrangement of the connecting mechanism, the flexibility of the device is improved. Rehabilitation flexion and extension training can be carried out on the whole hand and the whole arm, the functionality of the device is enriched, and rehabilitation training can be conveniently carried out on the other hand after adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field related to hand rehabilitation training, and in particular to a hand rehabilitation training device. Background Art

[0002] During the rehabilitation treatment of some stroke hemiplegic patients, it is usually necessary to perform flexion and extension rehabilitation training on the patient's hand joints to prevent the hand muscle atrophy and palm flattening in the later stage, which leads to the loss of hand motor function. However, the traditional manual flexion and extension rehabilitation training is time-consuming and laborious, and requires a lot of energy. Therefore, it is necessary to use the corresponding hand rehabilitation training device to assist the patient and the hand in flexion and extension rehabilitation training;

[0003] For example, announcement number CN111249110A discloses a finger rehabilitation training device, which relates to the field of rehabilitation robots and solves the technical problem of safe, convenient and effective rehabilitation training for patients' fingers. The device includes a driving mechanism, a motion mechanism, a connecting rod, a finger sleeve and a palm sleeve; the driving mechanism includes a torque limiting mechanism to provide safety protection for rehabilitation training movements, and the connecting rod ensures that the finger joints have no tendency to be damaged; the finger sleeves and palm sleeves enable the device to be worn on the hands, which is very convenient to use; the motion mechanism includes motion joints corresponding to the phalanges, and each motion joint can independently perform rehabilitation training on the finger joints; the driving mechanism and the motion mechanism are modularly designed, and the overall device is neat and occupies little space. The device is used for finger rehabilitation training;

[0004] For example, announcement number CN208770303U discloses a hand rehabilitation training device for rehabilitation medicine, which consists of a rehabilitation glove, a bottom elastic plate, a thumb trainer, and trainers for the index finger, middle finger, ring finger, and little finger; the hand rehabilitation training device for rehabilitation medicine is simple and practical, can facilitate hand patients to correct hand defects, and can help patients quickly restore hand functions, has a simple structure, is easy to operate and maintain, and is not only suitable for inpatients, but also suitable for home use of discharged patients; the seesaw design is cleverly adopted to change the previous single training mode of each finger, and change it to the assisted rehabilitation training of two adjacent fingers, making the rehabilitation training process more interesting, improving the training interest and mood of the patient, and thus improving the training effect; the rehabilitation gloves can be used alone, and elastic ropes are designed between the finger sleeves of the gloves, so that the purpose of training and rehabilitation can be achieved by simply stretching the fingers;

[0005] However, the existing hand rehabilitation training device still has the following shortcomings:

[0006] 1. The existing hand rehabilitation training device is not convenient for limiting the position between the hand and the training device, and the hand and the training device are prone to slippage, which affects the actual training effect;

[0007] 2. Existing hand rehabilitation training devices can usually only perform flexion and extension training on the joints of the fingers, which is not convenient for rehabilitation training of the entire hand and arm, and the functionality is relatively single;

[0008] 3. Existing hand rehabilitation training devices usually only perform flexion and extension training for the left or right hand, so a training device needs to be set up for each hand, which is inconvenient to switch training for both hands.

[0009] Therefore, we propose a hand rehabilitation training device to solve the above problems. Summary of the invention

[0010] The object of the present invention is to provide a hand rehabilitation training device to solve the problems raised by the above-mentioned background technology, such as it is inconvenient to limit the hand and the training device, it is easy for the hand and the training device to slip, which affects the actual training effect, and usually only the flexion and extension training of the joints in the finger area can be performed, which is inconvenient for rehabilitation training of the entire hand and arm. The functionality is relatively single, and usually only one-hand flexion and extension training is performed for the left hand or the right hand, so a training device needs to be set up on each side, which is inconvenient for switching training of both hands.

[0011] To achieve the above-mentioned object, the present invention provides the following technical solutions: a hand rehabilitation training device, comprising a base plate, a support column fixed to the upper end of the base plate, a fixed plate for support, and a training plate hingedly connected to the right end of the fixed plate;

[0012] Wherein, a fixing sleeve is arranged on the front side of the training board, and an elastic rope is arranged on the front side of the fixing sleeve;

[0013] Also includes:

[0014] A connecting sleeve, the connecting sleeve is fixedly connected to the left end of the fixing plate, and a movable rod is inserted in the middle of the connecting sleeve, and the movable rod is combined with the connecting sleeve, the protrusion and the fixing cap to drive the fixing plate to form a disassembly structure at the upper end of the supporting column;

[0015] A clamping mechanism, the clamping mechanism is arranged at the front end of the fixed plate, and the clamping mechanism comprises a fixed clamping plate fixedly connected to the front end of the fixed plate, a movable clamping plate hingedly connected to the lower end of the fixed clamping plate, and a soft pad arranged on the inner sides of the fixed clamping plate and the movable clamping plate;

[0016] The connecting mechanism is arranged at the rear end of the base plate, and the connecting mechanism drives the support rod to form a rotating structure in the middle of the support column. The connecting mechanism is combined with the support rod, the movable rod and the connecting sleeve to drive the fixed plate to form a front and rear swinging structure at the upper end of the base plate.

[0017] Preferably, a support rod is provided through the middle of the support column, and a movable rod is fixedly connected to the middle of the support rod. The movable rod is rotatably mounted on the upper end of the support column, and protrusions are fixedly connected to the front and rear ends of the movable rod.

[0018] Preferably, a micro motor for driving is fixedly mounted on the upper end of the fixed plate, and the output end of the micro motor is fixedly connected to a first gear, the micro motor drives the first gear to rotate at the upper end of the fixed plate, and the right end of the first gear is meshedly connected to a second gear.

[0019] Preferably, the first gear drives the training plate to rotate at the right end of the fixed plate through the second gear, and the second gear is fixedly connected to the upper end of the training plate.

[0020] Preferably, the connecting sleeve is snap-fitted to the protrusion, and a fixing cap is fitted on the upper end of the connecting sleeve, and the fixing cap is threadedly connected to the outer surface of the movable rod.

[0021] Preferably, the movable clamping plate forms a flip structure on the front side of the fixed clamping plate, and the upper end of the movable clamping plate is fixedly connected to an auxiliary plate, the front side of the auxiliary plate is fixedly connected to an auxiliary block, and the auxiliary plate and the movable frame are fitted together.

[0022] Preferably, the movable frame is snap-connected with the auxiliary block, and the movable frame is slidably connected to the upper end of the fixed clamping plate, a spring is provided between the movable frame and the fixed clamping plate, and a pull rod is fixedly connected to the upper end of the movable frame;

[0023] Wherein, a sliding structure is formed between the pull rod and the fixed clamping plate.

[0024] Preferably, an electric telescopic rod is fixedly mounted on the rear end of the base plate.

[0025] Preferably, the connecting mechanism includes a connecting plate fixedly connected to the output end of the electric telescopic rod, a connecting block fixedly connected to the front and rear sides of the lower end of the connecting plate, a fixed frame fixedly connected to the rear side of the upper end of the base plate, a movable sleeve rotatably connected to the upper end of the connecting plate, and a connecting column plugged into the middle of the movable sleeve.

[0026] Preferably, the connecting plate and the connecting block form a sliding structure with the fixed frame, the movable sleeve and the connecting column form a sliding structure, and the connecting column is fixedly connected to the side of the support rod.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the hand rehabilitation training device, through the setting of the clamping mechanism, is convenient for clamping and limiting the wrist, preventing the hand and the device from slipping during rehabilitation training, thereby ensuring the stability of the entire rehabilitation training process; the training plate is rotated at the right end of the fixed plate, so that the finger joints can be automatically flexed and extended; combined with the setting of the connecting mechanism, the entire hand and arm can be rehabilitated for flexion and extension, enriching the functionality of the device and achieving better rehabilitation training effects; the setting of the connecting sleeve, the protrusion, the fixing cap and the movable rod facilitates the disassembly between the fixing plate and the bottom plate, so that the fixing plate can be disassembled, flipped and adjusted, and then fixed, so that the other hand can be rehabilitated after adjustment, and the practicality is high;

[0028] 1. It is provided with a movable rod, a connecting sleeve, a convex block and a fixing cap. Through the arrangement of the movable rod, the connecting sleeve, the convex block and the fixing cap, it is convenient to disassemble the fixing plate, and after disassembly, it is turned over and adjusted and then fixed, so as to facilitate rehabilitation training for the other hand;

[0029] 2. A clamping mechanism is provided, which includes a fixed splint, a movable splint and a soft pad. Through the setting of the clamping mechanism, the arm can be clamped and fixed during training to prevent slippage between the hand and the device during training, thereby improving the stability of the entire training process;

[0030] 3. A connecting mechanism is provided, which includes a connecting plate, a connecting block, a fixed frame, a movable sleeve and a connecting column. Through the setting of the connecting mechanism, it is convenient to drive the fixed plate and the training plate to swing back and forth on the upper end of the base plate, so as to facilitate flexion and extension training of the entire hand, enriching the functionality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a front view structural schematic diagram of the fixing plate, training plate, fixing sleeve and elastic rope of the present invention;

[0033] Figure 3 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0034] Figure 4 It is a front view structural diagram of the support column, support rod, movable rod, connecting sleeve and clamping mechanism of the present invention;

[0035] Figure 5 This is a schematic diagram of the exploded structure of the connecting column, the supporting rod and the supporting column of the present invention;

[0036] Figure 6 It is a schematic diagram of the exploded structure of the movable rod, the protrusion, the connecting sleeve and the fixing cap of the present invention;

[0037] Figure 7 It is a front view structural diagram of the clamping mechanism and the movable frame of the present invention;

[0038] Figure 8 For the present invention Figure 7 The enlarged structural diagram at B in the middle;

[0039] Fig. 9 This is a schematic diagram of the structure of the fixed clamping plate and the movable clamping plate of the present invention in an open state;

[0040] Fig.10 This is a front view cross-sectional structural diagram of the fixed clamping plate and the movable frame of the present invention;

[0041] Fig.11 It is a schematic diagram of the exploded structure of the soft pad, auxiliary plate, auxiliary block and movable frame of the present invention;

[0042] Fig.12 It is a schematic diagram of the overall structure of the electric telescopic rod and the connecting mechanism of the present invention.

[0043] In the figure: 1. bottom plate; 2. support column; 3. support rod; 4. movable rod; 5. fixed plate; 6. training plate; 7. fixed sleeve; 8. elastic rope; 9. micro motor; 10. first gear; 11. second gear; 12. connecting sleeve; 13. convex block; 14. fixing cap; 15. clamping mechanism; 16. fixed clamping plate; 17. movable clamping plate; 18. cushion; 19. auxiliary plate; 20. auxiliary block; 21. spring; 22. movable frame; 23. pull rod; 24. electric telescopic rod; 25. connecting mechanism; 26. connecting plate; 27. connecting block; 28. fixed frame; 29. ​​movable sleeve; 30. connecting column. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] See also Figure 1-Figure 12 , the present invention provides the following technical solutions:

[0046] Embodiment 1: In order to solve the problem in the prior art that it is inconvenient to limit the position between the hand and the training device, the hand and the training device are prone to slippage, and the actual training effect is affected, the present embodiment adopts the following technical scheme, a hand rehabilitation training device, provided with a base plate 1, a support column 2, a support rod 3, a movable rod 4, a fixed plate 5, a clamping mechanism 15, an auxiliary plate 19, an auxiliary block 20, a spring 21, a movable frame 22 and a pull rod 23, the middle part of the support column 2 is penetrated by the support rod 3, and the middle part of the support rod 3 is fixedly connected to the movable rod 4, the movable rod 4 is rotatably mounted on the upper end of the support column 2, the clamping mechanism 15 includes a fixed rod 15 fixedly connected to the front end of the fixed plate 5 The splint 16, the movable splint 17 hingedly connected to the lower end of the fixed splint 16, and the cushion 18 arranged on the inner sides of the fixed splint 16 and the movable splint 17, the movable splint 17 forms a flip structure on the front side of the fixed splint 16, and the upper end of the movable splint 17 is fixedly connected to an auxiliary plate 19, the front side of the auxiliary plate 19 is fixedly connected to an auxiliary block 20, and the auxiliary plate 19 and the movable frame 22 are fitted together, the movable frame 22 and the auxiliary block 20 are snap-fitted, and the movable frame 22 is slidably connected to the upper end of the fixed splint 16, a spring 21 is arranged between the movable frame 22 and the fixed splint 16, and the upper end of the movable frame 22 is fixedly connected to a pull rod 23, and a sliding structure is formed between the pull rod 23 and the fixed splint 16, such as Figure 1 , Figure 2 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, the trainer first places the wrist in the middle of the fixed splint 16, then pulls the pull rod 23 upwards, the pull rod 23 slides with the fixed splint 16, and the pull rod 23 drives the movable frame 22 to move upwards, at this time the movable frame 22 squeezes the spring 21, so that the spring 21 is elastically deformed, and then the movable splint 17 is flipped upwards, and the movable splint 17 rotates with the fixed splint 16, and the movable splint 17 is fitted on the front side of the fixed splint 16, and the wrist is clamped and fixed by the movable splint 17 and the fixed splint 16 to prevent slipping during the training process, improve the stability of the entire training process, and combine with the contact of the soft pad 18 with the hand to increase the comfort of the entire contact, and then directly release the pull rod 23, at this time the spring 21 restores the elastic deformation, pushes the movable frame 22 to move downward, so that the movable frame 22 and the auxiliary plate 19 are fitted, and the movable frame 22 is engaged with the auxiliary block 20, so as to facilitate the limiting of the movable splint 17 and the fixed splint 16;

[0047] Embodiment 2: Existing hand rehabilitation training devices can usually only perform flexion and extension training on the joints of the fingers, which is not convenient for rehabilitation training of the entire hand and arm, and the functionality is relatively single. Therefore, by setting a training plate 6, a fixing sleeve 7, an elastic rope 8, a micro motor 9, a first gear 10, a second gear 11, an electric telescopic rod 24 and a connecting mechanism 25, the front side of the training plate 6 is provided with a fixing sleeve 7, and the front side of the fixing sleeve 7 is provided with an elastic rope 8, the upper end of the fixing plate 5 is fixedly installed with a micro motor 9 for driving, and the output end of the micro motor 9 is fixedly connected with the first gear 10, the micro motor 9 drives the first gear 10 to rotate at the upper end of the fixing plate 5, and the right end of the first gear 10 is meshed and connected with the second gear 11 The second gear 11 drives the training board 6 to rotate at the right end of the fixed plate 5, and the second gear 11 is fixedly connected to the upper end of the training board 6, and the rear end of the base plate 1 is fixedly installed with an electric telescopic rod 24, and the connecting mechanism 25 includes a connecting plate 26 fixedly connected to the output end of the electric telescopic rod 24, a connecting block 27 fixedly connected to the front and rear sides of the lower end of the connecting plate 26, a fixed frame 28 fixedly connected to the rear side of the upper end of the base plate 1, a movable sleeve 29 rotatably connected to the upper end of the connecting plate 26 and a connecting column 30 plugged into the middle of the movable sleeve 29, the connecting plate 26 and the connecting block 27 both form a sliding structure with the fixed frame 28, the movable sleeve 29 and the connecting column 30 form a sliding structure, and the connecting column 30 is fixedly connected to the side of the support rod 3, as shown in FIG. Figure 1 , Figure 2 and Fig.12 As shown, after the clamping limit between the palm and the fixed plate 5 is completed, the micromotor 9 is started, the micromotor 9 drives the first gear 10 to rotate slowly back and forth, the first gear 10 drives the second gear 11 to rotate, and then drives the training plate 6 and the fixed plate 5 to rotate, so as to perform flexion and extension training on the fingers, and at the same time, the electric telescopic rod 24 is started, the electric telescopic rod 24 drives the connecting plate 26 to slide left and right in the fixed frame 28, and at the same time, the connecting block 27 slides between the fixed frame 28, so as to improve the stability of the connecting plate 26 during the movement, and the connecting plate 26 rotates with the movable sleeve 29, thereby driving the movable sleeve 29 to slide on the outside of the connecting column 30, so that the connecting column 30 drives the support rod 3 and the movable rod 4 to rotate with the support column 2, and the movable rod 4 drives the fixed plate 5 to swing back and forth at the upper end of the bottom plate 1, combined with the rotation between the training plate 6 and the fixed plate 5, so as to drive the patient's hand and arm to perform rehabilitation flexion and extension training, which is highly practical.

[0048] Embodiment 3: Existing hand rehabilitation training devices usually only perform flexion and extension training for the left or right hand, so a training device needs to be set up on each side, which is inconvenient for switching training for both hands. Therefore, a movable rod 4, a connecting sleeve 12, a protrusion 13 and a fixing cap 14 are set up, the connecting sleeve 12 is fixedly connected to the left end of the fixing plate 5, and the middle part of the connecting sleeve 12 is plugged with the movable rod 4, the middle part of the support column 2 is penetrated by a support rod 3, and the middle part of the support rod 3 is fixedly connected with the movable rod 4, the movable rod 4 is rotatably installed on the upper end of the support column 2, and the front and rear ends of the movable rod 4 are fixedly connected with the protrusion 13, as shown in FIG. Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, when the training of one hand is finished, the power is turned off, the movable splint 17 releases the clamping of the hand, and then the fixing cap 14 threadedly connected to the outer surface of the movable rod 4 is rotated, the fixing cap 14 is disengaged from the movable rod 4, and then the limit between the movable rod 4 and the connecting sleeve 12 is loosened, and then the fixing plate 5 is pulled upward, and the fixing plate 5 drives the connecting sleeve 12 to disengage from the movable rod 4 and the protrusion 13, and the fixing plate 5 is disassembled, and then the fixing plate 5 is flipped to 180°, and after flipping, the connecting sleeve 12 is again sleeved on the outer side of the movable rod 4, and the connecting sleeve 12 is engaged with the protrusion 13, and then the fixing cap 14 is rotated, and the fixing cap 14 is threadedly connected to the movable rod 4, and the movable rod 4 and the connecting sleeve 12 are limited by the fixing cap 14, and the clamping mechanism 15 is installed, and then the operations in Examples 1 and 2 are repeated to clamp and limit the other hand and perform rehabilitation training, thereby facilitating flexion and extension rehabilitation training for both hands.

[0049] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. The standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hand rehabilitation training device, comprising a base plate (1), a support column (2) fixed to the upper end of the base plate (1), a fixing plate (5) for support, and a training plate (6) hingedly connected to the right end of the fixing plate (5); in, A fixing sleeve (7) is arranged on the front side of the training board (6), and an elastic rope (8) is arranged on the front side of the fixing sleeve (7); It is characterized by further comprising: A connecting sleeve (12), the connecting sleeve (12) being fixedly connected to the left end of the fixing plate (5), and a movable rod (4) being inserted in the middle of the connecting sleeve (12), the movable rod (4) being combined with the connecting sleeve (12), the protrusion (13) and the fixing cap (14) to drive the fixing plate (5) to form a disassembly structure at the upper end of the supporting column (2); A clamping mechanism (15), the clamping mechanism (15) being arranged at the front end of the fixed plate (5), and comprising a fixed clamping plate (16) fixedly connected to the front end of the fixed plate (5), a movable clamping plate (17) hingedly connected to the lower end of the fixed clamping plate (16), and a soft pad (18) arranged on the inner sides of the fixed clamping plate (16) and the movable clamping plate (17); A connecting mechanism (25) is arranged at the rear end of the base plate (1), and the connecting mechanism (25) drives the support rod (3) to form a rotating structure in the middle of the support column (2), and the connecting mechanism (25) is combined with the support rod (3), the movable rod (4) and the connecting sleeve (12) to drive the fixed plate (5) to form a forward and backward swinging structure at the upper end of the base plate (1).

2. A hand rehabilitation training device according to claim 1, characterized in that: A support rod (3) is provided through the middle of the support column (2), and a movable rod (4) is fixedly connected to the middle of the support rod (3); the movable rod (4) is rotatably mounted on the upper end of the support column (2), and protrusions (13) are fixedly connected to both the front and rear ends of the movable rod (4).

3. A hand rehabilitation training device according to claim 1, characterized in that: A micro motor (9) for driving is fixedly mounted on the upper end of the fixing plate (5), and the output end of the micro motor (9) is fixedly connected to a first gear (10); the micro motor (9) drives the first gear (10) to rotate on the upper end of the fixing plate (5), and the right end of the first gear (10) is meshingly connected to a second gear (11).

4. A hand rehabilitation training device according to claim 3, characterized in that: The first gear (10) drives the training plate (6) to rotate at the right end of the fixed plate (5) via the second gear (11), and the second gear (11) is fixedly connected to the upper end of the training plate (6).

5. The hand rehabilitation training device according to claim 1, characterized in that: The connecting sleeve (12) is snap-fitted to the protrusion (13), and a fixing cap (14) is fitted on the upper end of the connecting sleeve (12), wherein the fixing cap (14) is threadedly connected to the outer surface of the movable rod (4).

6. The hand rehabilitation training device according to claim 1, characterized in that: The movable clamping plate (17) forms a flip structure on the front side of the fixed clamping plate (16), and the upper end of the movable clamping plate (17) is fixedly connected to an auxiliary plate (19), the front side of the auxiliary plate (19) is fixedly connected to an auxiliary block (20), and the auxiliary plate (19) and the movable frame (22) are arranged in a close fit.

7. A hand rehabilitation training device according to claim 6, characterized in that: The movable frame (22) is snap-connected with the auxiliary block (20), and the movable frame (22) is slidably connected to the upper end of the fixed clamping plate (16), a spring (21) is provided between the movable frame (22) and the fixed clamping plate (16), and a pull rod (23) is fixedly connected to the upper end of the movable frame (22); A sliding structure is formed between the pull rod (23) and the fixed clamping plate (16).

8. The hand rehabilitation training device according to claim 1, characterized in that: An electric telescopic rod (24) is fixedly mounted on the rear end of the base plate (1).

9. The hand rehabilitation training device according to claim 1, characterized in that: The connecting mechanism (25) comprises a connecting plate (26) fixedly connected to the output end of the electric telescopic rod (24), a connecting block (27) fixedly connected to the front and rear sides of the lower end of the connecting plate (26), a fixing frame (28) fixedly connected to the rear side of the upper end of the base plate (1), a movable sleeve (29) rotatably connected to the upper end of the connecting plate (26), and a connecting column (30) plugged into the middle of the movable sleeve (29).

10. The hand rehabilitation training device according to claim 9, characterized in that: The connecting plate (26) and the connecting block (27) form a sliding structure with the fixed frame (28), the movable sleeve (29) and the connecting column (30) form a sliding structure, and the connecting column (30) is fixedly connected to the side of the support rod (3).

Images