Self-controlled stroke lower limb rehabilitation training device

By designing a self-controlled lower limb rehabilitation training device for stroke that includes training, massage, and companionship facilities, the problems of cumbersome operation and high cost have been solved, achieving the effects of simplified operation, reduced costs, and accelerated rehabilitation.

CN119367172BActive Publication Date: 2025-11-04CHINESE PEOPLES LIBERATION ARMY ARMY SPECIAL MEDICAL CENTER
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Patent Information

Application Number
CN202411766459.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-04
Publication Date
2025-11-04
Estimated Expiration
2044-12-04

AI Technical Summary

Technical Problem

Existing self-controlled lower limb rehabilitation training devices for stroke are cumbersome to operate, affecting work efficiency and costing a lot.

Method used

A self-controlled lower limb rehabilitation training device for stroke was designed, which includes a training mechanism, a massage mechanism, and a companion mechanism. The device uses a drive motor to raise and lower the training sliding plate and perform massage. Combined with a foldable training baffle and an unfoldable companion bed, the operation process is simplified.

Benefits of technology

It reduced usage costs, improved work efficiency, promoted lower limb rehabilitation for patients, reduced care costs, and accelerated the recovery process for patients.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a self-control type stroke lower limb rehabilitation training device, and relates to the field of medical instruments, which comprises two guide sliding grooves, the two guide sliding grooves are arranged on the outer side of a bed frame, a fixed baffle is fixedly connected to the upper end face of the front end of the bed frame, two sliding frames are arranged, the two sliding frames are respectively slidably connected to the inner sides of the two guide sliding grooves, a training baffle is rotatably connected to the inner sides of the two sliding frames, a training sliding plate is slidably connected to the inner side of the training baffle, a mattress is arranged on the upper end face of the bed frame, and a plurality of fixed supports are arranged, the plurality of fixed supports are fixedly connected to the lower end face of the bed frame. The self-control type stroke lower limb rehabilitation training device is usually an independent device, when in use, the rehabilitation training device needs to be moved to the place where the patient needs to use, and then the lower limbs of the patient are placed on the rehabilitation training device for rehabilitation training, so that the operation is relatively complicated and the working efficiency is affected. The working efficiency is improved.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a self-control type stroke lower limb rehabilitation training device. BACKGROUND

[0002] Stroke is a disease caused by various reasons leading to damage of cerebral blood vessels, and then producing focal or whole brain tissue damage. During the rehabilitation process of stroke patients, long-term limb training is needed for limb function recovery. When the patient performs lower limb rehabilitation training, the patient's lower limbs need to be placed on the rehabilitation training device, and then the patient's lower limbs are flexed and stretched by the operation of the rehabilitation training device.

[0003] According to the application number: CN202111279029.4 discloses a lower limb bedside training rehabilitation device, comprising: a liftable base including a base body and a lifting column sleeved thereon; a telescopic arm including a fixed body fixedly connected with the lifting column and a movable body sleeved on the fixed body and capable of moving axially relative to the fixed body; a drive assembly provided at the end of the movable body, including a drive motor and a drive shaft connected thereto; a training assembly including cranks fixedly sleeved on both ends of the transmission shaft, a supine foot pedal detachably and pivotally connected with the crank, and a lateral foot pedal detachably and pivotally connected with the crank at either end of the transmission shaft; a small leg support is pivotally connected on each foot pedal; and a controller for controlling the movement of the lifting column and the drive motor, and combining the change of the installation position of the training assembly and the drive shaft to provide different lower limb training modes. The present disclosure can realize multifunctional rehabilitation exercise training to meet the different training needs of patients.

[0004] However, the existing self-control type stroke lower limb rehabilitation training device is usually an independent device. When in use, the rehabilitation training device needs to be moved to the place where the patient needs to use it, and then the patient's lower limbs are placed on the rehabilitation training device for rehabilitation training after the rehabilitation training device is adjusted to the appropriate position. The operation is relatively cumbersome, which affects the work efficiency. SUMMARY

[0005] Therefore, the present application provides a self-control type stroke lower limb rehabilitation training device, which has the advantages of reducing use cost, improving work efficiency and reducing accompanying cost.

[0006] The application provides a self-controlled stroke lower limb rehabilitation training device, which specifically comprises a bed frame, guide sliding grooves, a fixed baffle, sliding frames, a training baffle, a training sliding plate, a mattress, fixed supports, a driving motor, a training mechanism, a massage mechanism and a companion mechanism.

[0007] Further, the training mechanism comprises a limiting slot, a limiting plug and a limiting spring.

[0008] Further, the training mechanism further comprises a connecting rod, a fixed threaded block and a threaded shaft.

[0009] Further, the training mechanism further comprises a slot, a first sliding groove and a sliding connecting block.

[0010] Further, the training mechanism further comprises a second sliding groove and a support rod.

[0011] Further, the massage mechanism comprises a soft pad and a massage sliding rod; the soft pad is fixedly connected to the outer side of the training sliding plate; and the massage sliding rod is slidingly connected to the rear end surface of the training sliding plate.

[0012] Further, the massage mechanism further comprises connecting threaded blocks, threaded rods, a driving motor, connecting pulleys and a connecting belt; the connecting threaded blocks are provided in two, and both of the connecting threaded blocks are fixedly connected to the outer side of the massage sliding rod and slidingly connected to the training sliding plate; the threaded rods are provided in two, and both of the threaded rods are rotatably connected to the inner side of the training sliding plate and threadedly connected to the inner side of the connecting threaded blocks; the driving motor is fixedly installed on the inner side of the training sliding plate, and the driving motor rotating shaft is fixedly connected to the left threaded rod; the connecting pulleys are provided in two, and both of the connecting pulleys are fixedly connected to the upper ends of the threaded rods; and the connecting belt is wrapped around the outer side of the connecting pulleys.

[0013] Further, the accompanying mechanism comprises receiving sliding grooves and an accompanying bed plate; the receiving sliding grooves are provided in multiple, and the receiving sliding grooves are respectively formed in the inner side of the lower end of the bed frame; and the accompanying bed plate is slidingly connected to the inner side of the receiving sliding grooves.

[0014] Further, the accompanying mechanism further comprises fixed blocks, fixed limiting blocks, hinged supporting legs, limiting sliding blocks and compression springs; the fixed blocks are provided in two, and both of the fixed blocks are fixedly connected to the lower end surface of the accompanying bed plate; the fixed limiting blocks are provided in two, and both of the fixed limiting blocks are fixedly connected to the outer side of the fixed blocks; the hinged supporting legs are provided in two, and both of the hinged supporting legs are hingedly connected to the lower end surface of the accompanying bed plate; the limiting sliding blocks are provided in two, and both of the limiting sliding blocks are slidingly connected to the inner side of the hinged supporting legs; and the compression springs are provided in two, and one end of each of the compression springs is fixedly connected to the outer side of the limiting sliding blocks, and the other end of each of the compression springs is fixedly connected to the inner side of the hinged supporting legs.

[0015] Compared with the prior art, the massage bed has the following beneficial effects:

[0016] The application realizes rehabilitation training of the lower limbs of the patient through the setting of the training mechanism, the limiting plug is pressed downward to make the limiting plug disengage from the limiting slot, at this time, the training baffle can be folded to make the training baffle horizontal, when the training baffle is folded, the sliding connecting block is inserted into the inner side of the insertion slot, the driving motor is started, the driving motor drives the threaded shaft to rotate, the rotation of the threaded shaft drives the training baffle to slide through the connecting rod and the sliding frame under the action of the threaded connection with the fixed threaded block, the sliding of the training baffle makes the sliding connecting block slide relative to the training baffle, the support rod is moved by the sliding connecting block to make the support rod support the training sliding plate, the driving motor shaft can realize the lifting of the training sliding plate through the forward and reverse rotation to drive the patient's lower limbs to flex and extend, the rehabilitation training equipment is purchased separately, the use cost is reduced, the operation is simple, and the work efficiency is improved.

[0017] In addition, the massage mechanism is set to realize massage of the lower limbs of the patient, the driving motor is started, the driving motor drives the left threaded rod to rotate, the rotation of the threaded rod drives the right threaded rod to rotate under the action of the connecting belt wheel and the connecting belt, the rotation of the threaded rod drives the massage sliding rod to slide under the action of the threaded connection with the connecting threaded block, the sliding of the massage sliding rod massages the legs of the patient above the soft pad, promotes blood circulation of the lower limbs of the patient, and accelerates the recovery speed of the patient.

[0018] In addition, the setting of the accompanying mechanism facilitates the rest of the accompanying personnel, after the accompanying bed plate is pulled out, the limiting sliding block is pressed to make the limiting sliding block disengage from the fixed limiting block, at this time, the hinged support leg can be opened to make the hinged support leg support on the ground, facilitating the rest of the accompanying personnel, without the accompanying personnel renting a bed additionally, and the accompanying cost is reduced.

[0019] In addition, the setting of the above mechanism realizes rehabilitation training of the lower limbs of the patient, reduces the use cost, improves the work efficiency, realizes massage of the lower limbs of the patient, promotes blood circulation of the lower limbs of the patient, accelerates the recovery speed of the patient, facilitates the rest of the accompanying personnel, and reduces the accompanying cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings of the embodiments will be briefly introduced below.

[0021] The drawings in the following description only relate to some embodiments of the application, rather than limiting the application.

[0022] In the drawings:

[0023] Figure 1 is a structural schematic view of the main body of the first embodiment of the application.

[0024] Figure 2It is the structure schematic view of the training baffle folding of the embodiment one of the present application.

[0025] Figure 3 It is the structure schematic view of the limiting slot of the embodiment one of the present application.

[0026] Figure 4 It is the structure schematic view of the connecting rod of the embodiment one of the present application.

[0027] Figure 5 It is the structure schematic view of the threaded shaft of the embodiment one of the present application.

[0028] Figure 6 It is the structure schematic view of the Figure 5 It is the structure schematic view of the partial enlargement at A in the above.

[0029] Figure 7 It is the structure schematic view of the support rod splitting of the embodiment two of the present application.

[0030] Figure 8 It is the structure schematic view of the massage sliding rod of the embodiment two of the present application.

[0031] Figure 9 It is the structure schematic view of the accompanying bed board pulling out of the embodiment three of the present application.

[0032] Figure 10 It is the structure schematic view of the hinged support leg opening of the embodiment three of the present application.

[0033] Figure 11 It is the structure schematic view of the hinged support leg section of the embodiment three of the present application.

[0034] List of reference signs

[0035] 1, bed frame; 101, guide sliding slot; 102, insertion slot; 103, storage sliding slot; 2, fixed baffle; 3, sliding frame; 301, connecting rod; 302, fixed threaded block; 4, training baffle; 401, limiting slot; 402, first sliding slot; 5, training sliding plate; 501, second sliding slot; 6, bed mattress; 7, fixed support; 8, driving motor; 9, limiting insertion block; 901, limiting spring; 10, threaded shaft; 11, sliding connecting block; 12, support rod; 13, soft pad; 14, massage sliding rod; 1401, connecting threaded block; 15, threaded rod; 16, driving motor; 17, connecting pulley; 18, connecting belt; 19, accompanying bed board; 20, fixed block; 2001, fixed limiting block; 21, hinged support leg; 22, limiting sliding block; 2201, compression spring. DETAILED DESCRIPTION

[0036] Embodiment one:

[0037] Please refer toFigures 1-6 as shown:

[0038] The application provides a self-controlled stroke lower limb rehabilitation training device, which comprises a bed frame 1, guide sliding grooves 101, fixed baffle plates 2, sliding frames 3, training baffle plates 4, training sliding plates 5, a bed mattress 6, fixed supports 7, a driving motor 8 and a training mechanism; the guide sliding grooves 101 are provided in pairs and are arranged on the outer sides of the bed frame 1; the fixed baffle plates 2 are fixedly connected to the upper end faces of the front end of the bed frame 1; the sliding frames 3 are provided in pairs and are slidably connected to the inner sides of the guide sliding grooves 101; the training baffle plates 4 are rotatably connected to the inner sides of the sliding frames 3; the training sliding plates 5 are slidably connected to the inner sides of the training baffle plates 4; the bed mattress 6 is placed on the upper end face of the bed frame 1; the fixed supports 7 are provided in plurality and are fixedly connected to the lower end face of the bed frame 1; the driving motor 8 is fixedly installed on the lower end face of the bed frame 1; and the training mechanism is arranged at the rear end of the bed frame 1.

[0039] The training mechanism comprises: insertion grooves 102, connecting rods 301, fixed threaded blocks 302, limiting grooves 401, first sliding grooves 402, second sliding grooves 501, limiting plug blocks 9, limiting springs 901, threaded shafts 10, sliding connecting blocks 11 and support rods 12; the insertion grooves 102 are provided in pairs and are arranged on the inner sides of the rear end of the bed frame 1; the connecting rods 301 are fixedly connected to the inner sides of the sliding frames 3; the fixed threaded blocks 302 are fixedly connected to the lower end face of the connecting rods 301; the limiting grooves 401 are arranged on the lower end of the training baffle plates 4; the first sliding grooves 402 are provided in pairs and are arranged on the inner sides of the training baffle plates 4; the second sliding grooves 501 are provided in pairs and are arranged on the outer sides of the training sliding plates 5; the limiting plug blocks 9 are slidably connected to the inner sides of the rear end of the bed frame 1; the limiting springs 901 are provided in pairs and are fixedly connected to the lower end face of the limiting plug blocks 9; the threaded shafts 10 are fixedly connected to the rear end of the rotating shaft of the driving motor 8 and are threadedly connected to the inner sides of the fixed threaded blocks 302; the sliding connecting blocks 11 are provided in pairs and are slidably connected to the inner sides of the first sliding grooves 402; the sliding connecting blocks 11 are slidably connected to the insertion grooves 102; each group of the support rods 12 is provided in two, the two support rods 12 of each group are hingedly connected to each other, the upper ends of the rear ends of the two groups of support rods 12 are slidably connected to the inner sides of the second sliding grooves 501, the lower ends of the rear ends of the two groups of support rods 12 are hingedly connected to the inner sides of the sliding connecting blocks 11, and the front ends of the two groups of support rods 12 are rotatably connected to the inner sides of the training baffle plates 4 and the training sliding plates 5.

[0040] The specific use and effect of the embodiment are as follows: the limiting plug 9 is pressed downward to be separated from the limiting groove 401, and the training baffle 4 can be folded at this time, so that the training baffle 4 is horizontal. When the training baffle 4 is folded, the sliding connecting block 11 is inserted into the inner side of the insertion groove 102. The driving motor 8 drives the threaded shaft 10 to rotate. The rotation of the threaded shaft 10 drives the training baffle 4 to slide through the connecting rod 301 and the sliding frame 3 under the action of the threaded connection with the fixed threaded block 302. The sliding of the training baffle 4 causes the sliding connecting block 11 to slide relative to the training baffle 4. The sliding connecting block 11 pushes the support rod 12 to move, so that the support rod 12 props up the training sliding plate 5. The rotation of the driving motor 8 can realize the lifting of the training sliding plate 5, so as to drive the patient's lower limbs to flex and extend.

[0041] Embodiment two

[0042] On the basis of embodiment one, as shown in Figures 7-8 The massage mechanism includes a soft pad 13, a massage sliding rod 14, a connecting threaded block 1401, a threaded rod 15, a driving motor 16, a connecting pulley 17 and a connecting belt 18. The massage mechanism is arranged on the inner side of the training sliding plate 5. The soft pad 13 is fixedly connected to the outer side of the training sliding plate 5. The massage sliding rod 14 is slidingly connected to the rear end face of the training sliding plate 5. The connecting threaded block 1401 is provided with two, and the two connecting threaded blocks 1401 are fixedly connected to the outer side of the massage sliding rod 14 and slidingly connected to the training sliding plate 5. The threaded rod 15 is provided with two, and the two threaded rods 15 are rotatably connected to the inner side of the training sliding plate 5 and are respectively threadedly connected to the inner side of the two connecting threaded blocks 1401. The driving motor 16 is fixedly installed on the inner side of the training sliding plate 5, and the driving motor 16 is fixedly connected to the left threaded rod 15. The connecting pulley 17 is provided with two, and the two connecting pulleys 17 are respectively fixedly connected to the upper ends of the two threaded rods 15. The connecting belt 18 is wrapped on the outer side of the two connecting pulleys 17.

[0043] The specific use and effect of the embodiment are as follows: the driving motor 16 is started, the driving motor 16 drives the left threaded rod 15 to rotate, the rotation of the threaded rod 15 drives the right threaded rod 15 to rotate under the action of the connecting pulley 17 and the connecting belt 18, and the rotation of the threaded rod 15 drives the massage sliding rod 14 to slide under the action of the threaded connection with the connecting threaded block 1401. The sliding of the massage sliding rod 14 massages the legs of the patient above the soft pad 13.

[0044] Embodiment three

[0045] On the basis of embodiment one, as shown in Figures 9-11As shown, the accompanying mechanism comprises: a receiving chute 103, an accompanying bed plate 19, a fixed block 20, a fixed limiting block 2001, a hinged support leg 21, a limiting sliding block 22 and a compression spring 2201; the accompanying mechanism is arranged on the inner side of the bed frame 1; the receiving chute 103 is provided with a plurality of receiving chutes 103, which are respectively arranged on the inner side of the lower end of the bed frame 1; the accompanying bed plate 19 is slidingly connected to the inner side of the receiving chute 103; the fixed block 20 is provided with two fixed blocks 20, which are both fixedly connected to the lower end face of the accompanying bed plate 19; the fixed limiting block 2001 is provided with two fixed limiting blocks 2001, which are both fixedly connected to the outer side of the two fixed blocks 20; the hinged support leg 21 is provided with two hinged support legs 21, which are both hingedly connected to the lower end face of the accompanying bed plate 19; the limiting sliding block 22 is provided with two limiting sliding blocks 22, which are both slidingly connected to the inner side of the two hinged support legs 21; the compression spring 2201 is provided with two compression springs 2201, one end of which is respectively fixedly connected to the outer side of the two limiting sliding blocks 22, and the other end of which is respectively fixedly connected to the inner side of the two hinged support legs 21.

[0046] The specific use and role of the embodiment are as follows: after the accompanying bed plate 19 is pulled out, the limiting sliding block 22 is pressed to make the limiting sliding block 22 disengage from the fixed limiting block 2001, at this time, the hinged support leg 21 can be opened to support on the ground, which is convenient for the accompanying person to rest.

Claims

1. A self-controlled stroke lower limb rehabilitation training device, comprising a bed frame (1), guide sliding grooves (101), fixed baffle plates (2), sliding frames (3), training baffle plates (4), training sliding plates (5), bed pads (6), fixed supports (7), drive motors (8), training mechanisms, massage mechanisms and accompanying mechanisms; the guide sliding grooves (101) are provided with two, and the two guide sliding grooves (101) are both arranged on the outer side of the bed frame (1); the fixed baffle plates (2) are fixedly connected to the upper end face of the front end of the bed frame (1); the sliding frames (3) are provided with two, and the two sliding frames (3) are respectively slidably connected to the inner side of the two guide sliding grooves (101); and the training baffle plates (4) are rotatably connected to the inner side of the two sliding frames (3); characterized in that: The training sliding plate (5) is slidingly connected to the inner side of the training baffle (4); the mattress (6) is placed on the upper end surface of the bed frame (1); the fixing supports (7) are provided in plurality, and each of the fixing supports (7) is fixedly connected to the lower end surface of the bed frame (1); the driving motor (8) is fixedly installed on the lower end surface of the bed frame (1); the training mechanism is arranged at the rear end of the bed frame (1); the massage mechanism is arranged at the inner side of the training sliding plate (5); and the accompanying mechanism is arranged at the inner side of the bed frame (1). The training mechanism comprises the limiting slot (401), the limiting plug (9) and the limiting spring (901); the limiting slot (401) is formed in the lower end of the training baffle (4); the limiting plug (9) is slidingly connected to the inner side of the rear end of the bed frame (1); and the limiting spring (901) is provided in two, and the upper ends of the two limiting springs (901) are fixedly connected to the lower end surface of the limiting plug (9), and the lower ends of the two limiting springs (901) are fixedly connected to the inner side of the bed frame (1). The training mechanism further comprises the connecting rod (301), the fixed threaded block (302) and the threaded shaft (10); the connecting rod (301) is fixedly connected to the inner side of the two sliding frames (3); the fixed threaded block (302) is fixedly connected to the lower end surface of the connecting rod (301); and the threaded shaft (10) is fixedly connected to the rear end of the rotating shaft of the driving motor (8), and the threaded shaft (10) is threadedly connected to the inner side of the fixed threaded block (302). The training mechanism further comprises the insertion slot (102), the first sliding slot (402) and the sliding connecting block (11); the insertion slot (102) is provided in two, and the two insertion slots (102) are both formed in the inner side of the rear end of the bed frame (1); the first sliding slot (402) is provided in two, and the two first sliding slots (402) are both formed in the inner side of the training baffle (4); and the sliding connecting block (11) is provided in two, and the two sliding connecting blocks (11) are respectively slidingly connected to the inner sides of the two first sliding slots (402) and slidingly connected to the insertion slots (102). The training mechanism further comprises the second sliding slot (501) and the support rod (12); the second sliding slot (501) is provided in two, and the two second sliding slots (501) are both formed in the outer side of the training sliding plate (5); the support rod (12) is provided in two groups, each group of the support rod (12) is provided in two, the two support rods (12) are hingedly connected to each other, the upper ends of the rear ends of the two groups of the support rods (12) are respectively slidingly connected to the inner sides of the two second sliding slots (501), the lower ends of the rear ends of the two groups of the support rods (12) are respectively hingedly connected to the inner sides of the two sliding connecting blocks (11), and the front ends of the two groups of the support rods (12) are respectively rotationally connected to the inner sides of the training baffle (4) and the training sliding plate (5).

2. The self-controlled stroke lower limb rehabilitation training device according to claim 1, characterized in that: The massage mechanism comprises the soft pad (13) and the massage sliding rod (14); the soft pad (13) is fixedly connected to the outer side of the training sliding plate (5); and the massage sliding rod (14) is slidingly connected to the rear end surface of the training sliding plate (5).

3. The self-controlled stroke lower limb rehabilitation training device according to claim 2, characterized in that: The massage mechanism further comprises connecting threaded blocks (1401), threaded rods (15), a driving motor (16), connecting pulleys (17) and a connecting belt (18); the connecting threaded blocks (1401) are provided in two, and both of the connecting threaded blocks (1401) are fixedly connected to the outer side of the massage sliding rod (14) and are in sliding connection with the training sliding plate (5); the threaded rods (15) are provided in two, and both of the threaded rods (15) are rotatably connected to the inner side of the training sliding plate (5) and are threadedly connected to the inner side of the two connecting threaded blocks (1401) respectively; the driving motor (16) is fixedly installed on the inner side of the training sliding plate (5), and the driving motor (16) is fixedly connected with the left threaded rod (15) through the rotating shaft; the connecting pulleys (17) are provided in two, and both of the connecting pulleys (17) are fixedly connected to the upper end of the two threaded rods (15) respectively; and the connecting belt (18) is wrapped around the outer side of the two connecting pulleys (17).

4. The self-controlled stroke lower limb rehabilitation training device according to claim 1, characterized in that: The accompanying mechanism comprises receiving sliding grooves (103) and accompanying bed plates (19); the receiving sliding grooves (103) are provided in multiple, and the multiple receiving sliding grooves (103) are respectively formed in the inner side of the lower end of the bed frame (1); and the accompanying bed plates (19) are in sliding connection with the inner side of the receiving sliding grooves (103).

5. The self-controlled stroke lower limb rehabilitation training device according to claim 4, characterized in that: The accompanying mechanism further comprises fixed blocks (20), fixed limiting blocks (2001), hinged supporting legs (21), limiting sliding blocks (22) and compression springs (2201); the fixed blocks (20) are provided in two, and both of the fixed blocks (20) are fixedly connected to the lower end face of the accompanying bed plate (19); the fixed limiting blocks (2001) are provided in two, and both of the fixed limiting blocks (2001) are fixedly connected to the outer side of the two fixed blocks (20) respectively; the hinged supporting legs (21) are provided in two, and both of the hinged supporting legs (21) are hinged to the lower end face of the accompanying bed plate (19); the limiting sliding blocks (22) are provided in two, and both of the limiting sliding blocks (22) are in sliding connection with the inner side of the two hinged supporting legs (21) respectively; and the compression springs (2201) are provided in two, and one end of both of the compression springs (2201) is fixedly connected to the outer side of the two limiting sliding blocks (22) respectively, and the other end of both of the compression springs (2201) is fixedly connected to the inner side of the two hinged supporting legs (21) respectively.

Citation Information

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