Rehabilitation training device for nursing in obstetrics and gynecology department
By designing a obstetrics and gynecology rehabilitation training device with angle adjustment, resistance adjustable and multi-dimensional training functions, the shortcomings of the existing devices in training angle adjustment, resistance adjustment and training action dimensions are solved, and a more personalized and effective rehabilitation training effect is achieved.
Patent Information
- Application Number
- CN202510564261.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2025-06-03
AI Technical Summary
The existing obstetrics and gynecology rehabilitation training devices have limitations in the training angle adjustment function, the resistance adjustment mechanism is single, and the training action dimension is single, making it difficult to meet the needs of personalized rehabilitation.
A rehabilitation training device including a base, an adjustment plate and a training part is designed to adjust the angle of the adjustment plate through a hydraulic telescopic rod. The first training component adjusts the resistance of the foot pedal through a rotating screw. The counterweight component adjusts the training intensity by increasing or decreasing the number of counterweight blocks, and realizes coordinated training of the inner and outer muscles of the legs through the second training part.
It has achieved flexible adjustment of training angles and resistances according to the patient's physical condition and training needs, providing a more comfortable and effective training environment, meeting the personalized needs of patients at different stages of rehabilitation, and improving the rehabilitation effect and convenience of training.
Smart Images
Figure CN120079077A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a rehabilitation training device for obstetrics and gynecology care, belonging to the technical field of rehabilitation training. Background Art
[0002] During pregnancy and the postpartum period, due to hormonal changes and fetal compression, women often experience relaxation of the pelvic floor muscle group. After childbirth, there will be a phenomenon of abdominal wall relaxation and fat deposition. At the same time, the pelvic and lumbar abdominal muscles become weak, and it is easy to have a large physical burden, causing low back pain and other conditions. Therefore, corresponding obstetrics and gynecology rehabilitation training is usually required to restore the tension of the abdominal wall and pelvic muscles. Postpartum rehabilitation training plays an important role in restoring the support function of pelvic organs, improving abdominal wall relaxation, and preventing complications such as urinary incontinence.
[0003] In the prior art, the structure of the traditional fixed training table is fixed and cannot dynamically adjust the training angle according to the patient's position. It is particularly difficult to meet the usage requirements of patients who are bedridden or have limited mobility after surgery, resulting in insufficient comfort for such patients during training and may affect the training effect due to improper position. Moreover, the resistance adjustment of the existing device mostly relies on a fixed structure and cannot achieve dynamic resistance grading adaptation. When the patient's rehabilitation progress changes, the fixed resistance is likely to cause excessive muscle load (such as too much resistance) or insufficient training intensity (such as too little resistance), making it difficult to meet the personalized rehabilitation needs. Traditional equipment usually only supports training actions in a single direction and lacks a coordinated training design for multiple dimensions such as the pelvic floor muscles and leg muscles. It cannot comprehensively simulate natural gait or opening and closing movements, resulting in uneven muscle group exercise and limited rehabilitation effect. Summary of the Invention
[0004] The present invention provides a rehabilitation training device for obstetrics and gynecology care to solve the problems of limited training angle adjustment function, single resistance adjustment mechanism, and single training action dimension in the prior art.
[0005] The present invention provides a rehabilitation training device for obstetrics and gynecology care, which includes a base and an adjustment plate. The base and the adjustment plate are hinged to each other through an adjustment component. Two training parts are arranged on both sides of the adjustment plate, and a second training part is slidably connected between the two training parts and the adjustment plate. The training part includes a support frame and a foot pedal. An arc-shaped chute corresponding to the foot pedal is arranged on the support frame, and a first training component corresponding to the foot pedal is arranged in the arc-shaped chute. The foot pedal is slidably connected in the arc-shaped chute and cooperates with the first training component to achieve pedaling training. The first training component includes a first screw rod and a first pressing plate. The first pressing plate is slidably connected to the arc-shaped chute through the first screw rod, and the first pressing plate is connected to the foot pedal through a first spring. The two sides of the pedal are provided with corresponding counterweight components. The counterweight components include a counterweight frame and counterweight blocks. The pedal is provided with counterweight bolts corresponding to the multiple counterweight blocks, and the counterweight bolts can be threadedly connected with the multiple counterweight blocks.
[0006] Preferably, the adjusting component is a hydraulic telescopic rod, and the adjusting component is located on both sides of the adjusting plate.
[0007] Preferably, the adjusting plate is provided with a sliding groove corresponding to the second training part. The second training part is located inside the arc-shaped sliding groove, and the support frame is slidably connected with the sliding groove.
[0008] Preferably, both sides inside the arc-shaped sliding groove are provided with limit blocks corresponding to the pedal. The limit blocks are in contact with the arc-shaped sliding groove. The pedal is located between the limit blocks and the first pressing plate, and the pedal is provided with a plurality of anti-slip points.
[0009] Preferably, one end of the first screw rod passes through the support frame and is threadedly connected with the support frame. The first screw rod is located at one end of the pedal away from the second training part.
[0010] Preferably, the multiple counterweight blocks are slidably connected with the counterweight frame. The surfaces of the multiple counterweight blocks are provided with magnetic adsorption layers, and the multiple counterweight blocks are magnetically adsorbed to each other. The pedal is provided with a counterweight bracket corresponding to the counterweight bolt, and the counterweight bolt passes through the counterweight bracket and is threadedly connected with the multiple counterweight blocks.
[0011] Preferably, the second training part includes a first sliding rod and a second spring. The support frame passes through the first sliding rod and is slidably connected with the first sliding rod. The second spring is located on the first sliding rod and between the two support frames.
[0012] Preferably, the bottom of the base is provided with a fixing component. The fixing component includes a fixing clamp block and a handle. The fixing clamp block and the handle are both fixedly connected with the base on both sides of the base. The bottom of the fixing clamp block is bent, and the bottom of the fixing clamp block is provided with a fixing bolt connected by threads.
[0013] Preferably, the two sides of the support frame are fixedly connected with baffles. The second training part further includes a second sliding rod and a third spring. The second sliding rod is parallel to the first sliding rod. The support frame passes through the second sliding rod and is slidably connected with the second sliding rod. The third spring is located on both sides of the support frame on the second sliding rod.
[0014] Preferably, the upper ends of the second spring and the third spring are both provided with limit plates corresponding to the support frame.
[0015] The beneficial effects of the present invention: The present invention provides a rehabilitation training device for obstetrics and gynecology care. It realizes the angle adjustment of the adjustment plate through the adjustment component, can flexibly adjust the training angle according to the patient's physical condition and training needs, provides a more comfortable and effective training environment for the patient, and helps the patient gradually recover leg strength and motor ability. The first training component allows adjusting the resistance intensity of the first spring on the foot pedal by rotating the first screw according to the patient's rehabilitation progress and individual differences, avoiding the problems of muscle overload or insufficient training intensity, and ensuring the effectiveness and safety of training. The counterweight component allows adjusting the training intensity by increasing or decreasing the number of counterweight blocks according to the patient's rehabilitation needs, further increasing the diversity and personalization of training, and meeting the needs of patients in different rehabilitation stages. It not only supports pedaling training but also realizes the coordinated training of the inner and outer thigh muscles through the second training part. The multi-dimensional training mode can exercise the patient's pelvic floor muscles, leg muscles, etc. more comprehensively, improve the rehabilitation effect, and avoid the problem of poor rehabilitation effect caused by unbalanced training. Through the fixing component, the device can be easily placed on the hospital bed and fixed to the base by rotating the fixing bolt, enabling the patient to train at the bedside at any time, greatly improving the convenience and accessibility of training, and meeting the immediate training needs of patients with limited mobility. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 FIG. is a schematic diagram of the overall structure of a rehabilitation training device for obstetrics and gynecology care according to the present invention.
[0017] Figure 2 FIG. is a front view structural schematic diagram of a rehabilitation training device for obstetrics and gynecology care according to the present invention.
[0018] Figure 3 FIG. is a schematic diagram of the structure of another angle of a rehabilitation training device for obstetrics and gynecology care according to the present invention.
[0019] Figure 4 FIG. is a partial structural schematic diagram of a rehabilitation training device for obstetrics and gynecology care according to the present invention.
[0020] Figure 5 FIG. is a schematic diagram of the support frame structure of a rehabilitation training device for obstetrics and gynecology care according to the present invention.
[0021] Figure 6 FIG. is a partial structural schematic diagram of the counterweight component of a rehabilitation training device for obstetrics and gynecology care according to the present invention.
[0022] In the figure: 1. Base, 11. Adjusting component, 12. Sliding groove, 13. Fixing component, 131. Fixed clamping block, 132. Fixed bolt, 133. Handle, 2. Adjusting plate, 3. Training part, 31. Support frame, 311. Limit block, 32. First training component, 321. First screw rod, 322. First pressing plate, 323. First spring, 33. Foot pedal, 331. Counterweight support, 34. Counterweight component, 341. Counterweight frame, 342. Counterweight block, 343. Counterweight bolt, 35. Second training part, 351. First sliding rod, 352. Second spring, 353. Second sliding rod, 354. Third spring, 36. Baffle plate. Detailed implementation manner
[0023] Next, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Embodiment
[0024] The present invention provides a rehabilitation training device for obstetrics and gynecology care, which includes a base 1 and an adjusting plate 2. The adjusting plate 2 is hinged to the base 1 through an adjusting component 11. The adjusting component 11 is a hydraulic telescopic rod located on both sides at one end of the base 1. Both ends of the hydraulic telescopic rod are respectively hinged to the base 1 and the adjusting plate 2. One end of the adjusting plate 2 away from the adjusting component 11 is hinged to the base 1. A training part 3 is provided on the adjusting plate 2. The training part 3 is located on both sides of the adjusting plate 2. A sliding groove 12 corresponding to the training part 3 is provided on the adjusting plate 2. The top of the training part 3 is slidably connected to the sliding groove 12 in the sliding groove 12. The training part 3 includes a support frame 31 and a foot pedal 33. An arc-shaped sliding groove 01 corresponding to the foot pedal 33 is provided on the support frame 31. The arc-shaped sliding groove 01 is longitudinally arranged along the axial direction of the support frame 31. The foot pedal 33 is slidably connected to the support frame 31 in the arc-shaped sliding groove 01. A limit block 311 corresponding to the foot pedal 33 is provided on the support frame 31. The limit block 311 is fixedly connected to the support frame 31 inside both sides of the arc-shaped sliding groove 01 to limit the foot pedal 33. One end of the foot pedal 33 close to the adjusting component 11 is connected to the support frame 31 through a first training component 32. Counterweight components 34 corresponding to the foot pedal 33 are provided on both sides of the support frame 31. A plurality of uniformly distributed anti-slip points 02 are provided on the foot pedal 33; The first training component 32 includes a first screw rod 321 and a first pressing plate 322. The first pressing plate 322 slides in the arc-shaped sliding groove 01. The foot pedal 33 is located between the first pressing plate 322 and the limit block 311. The first screw rod 321 is located at one end of the first pressing plate 322 away from the foot pedal 33 and penetrates the support frame 31 to be connected to the first pressing plate 322. The first screw rod 321 is threadedly connected to the support frame 31. The first pressing plate 322 is connected to the foot pedal 33 through a first spring 323; The counterweight assembly 34 includes a counterweight frame 341 and counterweight blocks 342. Among them, there are multiple counterweight blocks 342. The multiple counterweight blocks 342 are located inside the counterweight frame 341 and are slidably connected to the counterweight frame 341. A magnetic attraction layer is provided on the surface of the counterweight blocks 342, and the multiple counterweight blocks 342 are magnetically attracted to each other. The foot pedal 33 is connected to the counterweight blocks 342 through a counterweight bracket 331. A counterweight bolt 343 connected to the counterweight blocks 342 is provided on the counterweight bracket 331. The counterweight bolt 343 passes through the counterweight frame 341 and the counterweight blocks 342 respectively, and the counterweight bolt 343 is threadedly connected to the counterweight frame 341 and the counterweight blocks 342; A second training part 35 is provided between the two side support frames 31. The second training part 35 is located in the sliding groove 12 and is connected to the two side support frames 31. The second training part 35 includes a first sliding rod 351 and a second spring 352. The second spring 352 is located between the two side support frames 31 and is in contact with the support frame 31. The top of the support frame 31 slides in the sliding groove 12 along the first sliding rod 351; A fixing component 13 is provided at the bottom of the base 1. The fixing component 13 includes a fixing clamp block 131 and a handle 133. The fixing clamp block 131 and the handle 133 are both fixedly connected to the two sides of the base 1 and the base 1. The bottom of the fixing clamp block 131 is bent and designed in an "ㄈ" shape. A fixing bolt 132 is provided at the bottom of the fixing clamp block 131, and the fixing bolt 132 is threadedly connected to the fixing clamp block 131.
[0025] When in use, place the device on the hospital bed through the handle 133, snap the bottom of the fixed clamping block 131 onto the edge of the hospital bed, and make the top of the fixing bolt 132 contact the bottom of the hospital bed edge by rotating the fixing bolt 132 to fix the base 1, enabling immediate bedside training and adapting to patients with inconvenient movement after surgery or childbirth. Start the operation of the adjusting component 11, the hydraulic telescopic rod starts to extend and retract, driving the adjusting plate 2 to rotate around the hinge point of the base 1. After rotating to the appropriate angle, the user places the leg in the arc-shaped chute 01 in the support frame 31, and the sole of the foot contacts the foot pedal 33. The foot pedal 33 is in contact with the limit block 311 at the initial position, and the limit block 311 limits and fixes the foot pedal 33. Apply force to the foot pedal 33 to simulate natural gait for stepping training. The foot pedal 33 slides along the arc-shaped chute 01, and the foot pedal 33 squeezes the first spring 323, and the first spring 323 starts to be stressed. During the training process, rotate the first screw rod 321 to drive the first pressing plate 322 to move, so that the first pressing plate 322 squeezes the first spring 323, thereby adjusting the resistance strength of the first spring 323 to the foot pedal 33, increasing the resistance of the first spring 323 to the foot pedal 33 during the stepping training process. At the same time, during the training process, rotate the counterweight bolt 343 to control the number of counterweight blocks 342 threadedly fixed to the counterweight bolt 343, adjust the counterweight mass, and the foot pedal 33 drives the counterweight block 342 to move synchronously during the sliding process, thereby realizing the counterweight of the foot pedal 33, increasing the training intensity, realizing personalized adaptation to the patient's rehabilitation process, and avoiding overloading or insufficient training; The user places both legs in the arc-shaped chute 01 on the support frame 31 and slides the tops of the two support frames 31 inward along the first sliding rod 351, and the second spring 352 starts to be stressed. The user starts the rehabilitation training through continuous opening and closing movements, avoiding the limitation of traditional equipment to single training actions and being unable to meet the multi-dimensional needs of postpartum rehabilitation.
[0026] Compared with the prior art, by means of the fixed clamping block 131 and the handle 133 in the fixing component 13, it can be easily placed on the hospital bed. The bottom of the fixed clamping block 131 is clamped on the edge of the hospital bed, and by rotating the fixed bolt 132, the fixing of the base 1 can be achieved, enabling the patient to perform training at the bedside at any time, greatly improving the convenience and accessibility of training, meeting the immediate training needs of patients with limited mobility. By adjusting the component 11, the adjusting plate 2 can be driven to rotate around the hinge point of the base 1. After rotating to an appropriate angle, training can be carried out. It can flexibly adjust the training angle according to the patient's physical condition and training needs, providing a more comfortable and effective training environment for the patient, and helping the patient gradually recover leg strength and motor ability. The footrest 33 is located between the first pressing plate 322 and the limiting block 311. By rotating the first screw rod 321, the first pressing plate 322 is driven to move, so that the first pressing plate 322 presses the first spring 323, thereby adjusting the resistance strength of the first spring 323 against the footrest 33. During the training process, the resistance of the first spring 323 against the footrest 33 can be increased or decreased at any time according to the patient's rehabilitation situation, avoiding overloading or insufficient training, and realizing personalized adaptation to the patient's rehabilitation process. The counterweight block 342 is located in the counterweight frame 341, and a magnetic adsorption layer is provided on the surface. The plurality of counterweight blocks 342 are magnetically adsorbed to each other. The footrest 33 is connected to the counterweight block 342 through the counterweight bracket 331. By rotating the counterweight bolt 343, the number of counterweight blocks 342 threadedly fixed to the counterweight bolt 343 can be controlled, and the counterweight mass can be accurately adjusted. During the sliding process of the footrest 33, the counterweight block 342 is driven to move synchronously, realizing the counterweight of the footrest 33, further increasing the intensity and diversity of training, and meeting the needs of patients in different rehabilitation stages. A second training part 35 is provided between the two support frames 31, including a first sliding rod 351 and a second spring 352. The top of the support frame 31 slides in the chute 12 along the first sliding rod 351. The user places both legs in the arc-shaped chute 01 on the support frame 31 and starts rehabilitation training through continuous opening and closing movements, which can exercise the muscles of different parts of the patient's legs, realize multi-dimensional training, and help the patient fully recover leg function. Embodiment
[0027] In the above-mentioned embodiment, there is a lack of two-way fixation of the legs, and it is easy to slide during movement, resulting in the dispersion of force, and the pelvic floor muscle group cannot be fully stressed. Moreover, a spring is arranged unidirectionally, and there is a lack of resistance during the outward expansion movement, resulting in unbalanced muscle group training. Therefore, in the embodiment of the present application, the second training part 35 is optimized to a certain extent on the basis of the above-mentioned embodiment.
[0028] In this embodiment, baffles 36 which are arranged in a bracing manner and fixedly connected to the support frame 31 are provided on both sides of the support frame 31. The second training part 35 further includes a second sliding rod 353 and a third spring 354. The second sliding rod 353 is parallel to the first sliding rod 351. The third spring 354 is located on both sides of the support frame 31. Limiting plates 03 corresponding to the support frame 31 are provided at the ends of the third spring 354 and the second spring 352. The limiting plates 03 penetrate through the second sliding rod 353 and the first sliding rod 351 respectively and are slidably connected to the second sliding rod 353 and the first sliding rod 351.
[0029] During use, the two legs are straightened inside the support frame 31, driving the support frame 31 to perform a left-right opening and closing movement. The baffles 36 on both sides of the support frame 31 can limit and fix the legs of the user, forming a physical limit to prevent the legs from shifting during training, ensuring that the force of the opening and closing action is accurately transmitted to the pelvic floor muscles, and enabling the inner and outer sides of the legs to better drive the support frame 31 to move. During the opening and closing movement, when moving inward, the support frame 31 contacts the limiting plate 03 at the end of the second spring 352, and the second spring 352 starts to be stressed and compressed. Then, when the legs move outward, the support frame 31 starts to slide outward along the first sliding rod 351 and the second sliding rod 353. When it contacts the limiting plate 03 on the third spring 354, the second sliding rod 353 starts to be stressed and compressed, so that the inner and outer sides of the user's legs are stressed, better exercising the pelvic floor muscles of the parturient, forcing the pelvic floor muscles to resist the elastic load throughout the opening and closing process, enhancing muscle endurance and coordination, and further making the exercise and rehabilitation effect better.
[0030] Compared with the prior art, by providing the baffles 36 which are arranged in a bracing manner and fixedly connected to the support frame 31 on both sides of the support frame 31, during use, when the two legs are straightened inside the support frame 31, the baffles 36 can limit and fix the legs of the user, forming a physical limit, which can effectively prevent the legs from shifting during training, ensure that the force of the opening and closing action is accurately transmitted to the pelvic floor muscles, avoid force dispersion, and enable the pelvic floor muscle group to be fully stressed, thereby improving the training effect and enabling the pelvic floor muscles of the parturient to be exercised more effectively. During the opening and closing movement, when moving inward, the support frame 31 contacts the limiting plate 03 at the end of the second spring 352, and the second spring 352 starts to be stressed and compressed, providing resistance for the legs to move inward. When the legs move outward, the support frame 31 starts to slide outward along the first sliding rod 351 and the second sliding rod 353. When it contacts the limiting plate 03 on the third spring 354, the third spring 354 starts to be stressed and compressed, providing resistance for the legs to move outward, enabling the inner and outer sides of the user's legs to be stressed, better exercising the pelvic floor muscles of the parturient, forcing the pelvic floor muscles to resist the elastic load throughout the opening and closing process, enhancing muscle endurance and coordination, avoiding the problem of poor rehabilitation effect caused by uneven training, and further making the exercise and rehabilitation effect better.
[0031] The present invention and its embodiments have been described above. Such description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In general, if those of ordinary skill in the art are inspired by it and, without departing from the spirit of the present invention, design similar structural modes and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.
Claims
1. A rehabilitation training device for obstetrics and gynecology nursing, comprising a base and an adjustment plate, wherein the base and the adjustment plate are hinged to each other through an adjustment assembly, characterized in that: The adjusting plate is provided with training parts on both sides, and second training parts are provided between the training parts on both sides and the adjusting plate for sliding connection; The training part comprises a support frame and a pedal, wherein the support frame is provided with an arc-shaped slide groove corresponding to the pedal, and the arc-shaped slide groove is provided with a first training component corresponding to the pedal, wherein the pedal is slidably connected in the arc-shaped slide groove and cooperates with the first training component to realize pedaling training; The first training component comprises a first screw and a first extrusion plate, wherein the first extrusion plate is slidably connected between the first screw and the arc-shaped slide groove, and the first extrusion plate is connected to the foot pedal via a first spring; Corresponding counterweight assemblies are arranged on both sides of the foot pedal, and the counterweight assemblies include a counterweight frame and a counterweight block. Counterweight bolts corresponding to the multiple counterweight blocks are arranged on the foot pedal, and the counterweight bolts can be threadedly connected to the multiple counterweight blocks.
2. A rehabilitation training device for obstetrics and gynecology nursing according to claim 1, characterized in that: The adjusting components are hydraulic telescopic rods, and the adjusting components are located on both sides of the adjusting plate.
3. A rehabilitation training device for obstetrics and gynecology nursing according to claim 1, characterized in that: The adjustment plate is provided with a slide groove corresponding to the second training part, the second training part is located inside the arc-shaped slide groove, and the support frame is slidably connected to the slide groove.
4. A rehabilitation training device for obstetrics and gynecology nursing according to claim 1, characterized in that: Limiting blocks corresponding to the pedals are arranged on both sides of the arc-shaped slide groove, the limiting blocks are in contact with the arc-shaped slide groove, the pedal is located between the limiting blocks and the first extrusion plate, and a plurality of anti-slip points are arranged on the pedal.
5. A rehabilitation training device for obstetrics and gynecology nursing according to claim 1, characterized in that: The first screw rod passes through one end of the support frame and is connected to the support frame via a thread. The first screw rod is located at an end of the foot pedal away from the second training part.
6. A rehabilitation training device for obstetrics and gynecology nursing according to claim 1, characterized in that: The multiple counterweight blocks are slidably connected to the counterweight frame, the surfaces of the multiple counterweight blocks are provided with a magnetic attraction layer, the multiple counterweight blocks are magnetically attracted to each other, a counterweight bracket corresponding to the counterweight bolt is provided on the foot pedal, and the counterweight bolt passes through the counterweight bracket and is threadedly connected to the multiple counterweight blocks.
7. A rehabilitation training device for obstetrics and gynecology nursing according to claim 1, characterized in that: The second training part includes a first sliding rod and a second spring. The support frame penetrates the first sliding rod and is slidably connected with the first sliding rod. The second spring is located on the first sliding rod and between the support frames on both sides.
8. A rehabilitation training device for obstetrics and gynecology nursing according to claim 1, characterized in that: A fixing assembly is provided at the bottom of the base, and the fixing assembly includes a fixing clamp block and a handle. The fixing clamp block and the handle are located on both sides of the base and are fixedly connected to the base. The bottom of the fixing clamp block is bent, and a threaded fixing bolt is provided at the bottom of the fixing clamp block.
9. A rehabilitation training device for obstetrics and gynecology nursing according to claim 7, characterized in that: Fixedly connected baffles are provided on both sides of the support frame. The second training part also includes a second sliding rod and a third spring. The second sliding rod is parallel to the first sliding rod. The support frame passes through the second sliding rod and is slidably connected with the second sliding rod. The third spring is located on both sides of the support frame on the second sliding rod.
10. A rehabilitation training device for obstetrics and gynecology nursing according to claim 9, characterized in that: The upper ends of the second spring and the third spring are both provided with limiting plates corresponding to the support frame.