Separable foot wear fixing device in lower limb training device
By adopting the design of a quick plugging and pulling mechanism in the lower limb training device, the problem of increased pain in the foot rehabilitation training of hemiplegia patients is solved, and the rapid removal and fixation of the foot pedal is achieved, which simplifies operation and reduces wearable pain.
Patent Information
- Application Number
- CN202010612333.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-06-30
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2040-06-30
AI Technical Summary
During the foot rehabilitation training of hemiplegia patients, due to the stiffness of the lower limbs, the prior art directly fixing the foot to the rehabilitation device will increase the patient's pain.
A detachable foot wearable fixture in a lower limb training device is designed, and a quick plug-in and pull-out mechanism is adopted, including a lock seat, a lock arm, a spring and a load seat, which can achieve rapid foot pedals through a four-link mechanism and a triangle structure. Disassemble and fix to reduce wear pain.
It realizes rapid disassembly and fixing of the foot pedal, simplifies operation, reduces the pain of wearing of patients, and realizes locking and unlocking through mechanical linkage, with good use effect.
Smart Images
Figure CN111616925B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a detachable foot wearing fixing device in a lower limb training device. Background Art
[0002] During the foot rehabilitation training of hemiplegic patients, the common practice is to directly fix the patient's feet in a rehabilitation device. Since hemiplegic patients have stiff lower limbs and their ankle joints are difficult to move, directly fixing the patient's feet in a rehabilitation device will increase the patient's pain. Summary of the invention
[0003] The present invention aims to solve the problems existing in the above-mentioned prior art and provides a detachable foot wearable fixing device in a lower limb training device.
[0004] The technical solutions adopted in the present invention are:
[0005] A detachable foot wearable fixing device in a lower limb training device comprises a foot pedal and a driving shaft, wherein the foot pedal is detachably mounted on the driving shaft.
[0006] Furthermore, the foot pedal is detachably mounted on the drive shaft through a quick-plug mechanism, and the quick-plug mechanism includes a lock seat, a lock arm, a spring and a load seat, the lock arm is hinged to the load seat, the spring is arranged in the load seat, and the free end of the spring abuts against the lock arm, a lock platform is provided on the lock arm, and a lock groove matched with the lock platform is provided on the lock seat, the load seat and the lock seat are plugged into each other, and the elastic force of the spring presses the lock platform on the lock arm tightly into the lock groove of the lock seat, the foot pedal is fixedly connected to the load seat, and the lock seat is fixedly connected to the drive shaft.
[0007] Furthermore, two locking arms are provided, the bottom ends of the two locking arms are hinged on the load seat through a pin shaft, and the spring is arranged between the two locking arms to open the two locking arms.
[0008] Furthermore, a positioning hole is provided on the locking arm, and the end of the spring is correspondingly placed in the positioning hole.
[0009] Furthermore, a connecting arm is hinged at the top of each of the two locking arms, and the ends of the two connecting arms are hinged to each other, so that the two locking arms and the two connecting arms form a four-bar linkage.
[0010] Furthermore, a handle is connected at the hinge points of the two connecting arms in the four-bar linkage.
[0011] Furthermore, the load seat includes a load arm and a limit block, which are fixedly connected by three pins, the three pins are distributed in a triangular shape, the locking arm is placed between the load arm and the limit block, and the locking arm is located on the inner side of the triangular outline surrounded by the three pins, and the elastic force of the spring presses the outer wall of the locking arm against the pin.
[0012] Furthermore, a guide sliding surface inclined toward the direction of the carrying arm is provided on the outer wall surface of the limit block.
[0013] Furthermore, the lock seat is provided with an insertion groove adapted to the outer contour of the limit block, the opposite side walls of the insertion groove are provided with locking grooves, and the side wall surface between the side walls where the locking groove is located is provided with an introduction inclined surface with the same inclination direction as the guide sliding surface.
[0014] Furthermore, an arc groove for accommodating a pin is provided above each locking groove.
[0015] Furthermore, a shaft sleeve is provided on the outer wall of the lock seat.
[0016] The foot pedal is detachably mounted on the driving shaft. When in use, the patient's foot is first fixed on the foot pedal, and then the foot pedal is mounted on the driving shaft. The foot pedal is connected to the driving shaft through a quick plug-in mechanism. The locking arm and the connecting arm in the quick plug-in mechanism form a four-bar linkage. Through mechanical mutual linkage, when the load seat is pulled out, only the handle needs to be pulled up, and the two locking arms can move toward each other. The mechanism is extremely simple to operate, and the "quick pull-out" of the locking arms can be achieved. When the load seat is inserted into the lock seat, the guide sliding surface and the introduction inclined surface cooperate with each other, which facilitates the accurate sliding of the load seat into the lock seat. Since the plug-in slot is a triangular structure, when the two locking arms are inserted into the plug-in slot, the two locking arms can move toward each other during the plug-in process through the triangular structure of the plug-in slot itself. No additional external force is required to squeeze and shrink the two locking arms. The locking arms can be directly inserted into the plug-in slot. The locking platform is inserted into the locking slot through the compression and springing of the spring. The "quick insertion" of the locking arms is achieved through the characteristics of the structure itself, and no additional external force is required. The beneficial effect produced by this is that the foot pedal of the present invention can be detachably installed on the drive shaft, which reduces the pain of patients wearing it. The quick plug-in mechanism realizes the locking and unlocking of the locking arm through the principle of mechanical linkage. It has a reasonable structural design, simple operation, and can quickly realize the locking and unlocking actions, with good use effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] FIG1 is a structural diagram of the present invention.
[0018] FIG. 2 is a structural diagram of the quick plug-in mechanism of the present invention.
[0019] FIG. 3 is an exploded view of the quick plug-in mechanism of the present invention.
[0020] FIG. 4 is an exploded view of the quick plug-in mechanism of the present invention.
[0021] FIG. 5 is a structural diagram of the locking arm in the load seat in the quick plug-in mechanism.
[0022] FIG. 6 is a structural diagram of the locking arm in the quick plug-in mechanism.
[0023] FIG. 7 is a structural diagram of the lock seat in the quick plug-in mechanism. DETAILED DESCRIPTION
[0024] The present invention will be further described below in conjunction with the accompanying drawings.
[0025] like Figures 1 to 7 The detachable foot wearable fixing device in the lower limb training device of the present invention includes a foot pedal 400 and a driving shaft 500, and the foot pedal 400 is detachably mounted on the driving shaft 500.
[0026] The foot pedal 400 of the present invention is detachably mounted on the drive shaft 500 through a quick plug-in mechanism. The specific structure of the quick plug-in mechanism is as follows:
[0027] The quick plug-in mechanism comprises a lock seat 1, a lock arm 2, a spring 3 and a load seat 4. The lock arm 2 is hinged on the load seat 4. The spring 3 is arranged in the load seat 4, and the free end of the spring 3 abuts against the lock arm 2. The lock arm 2 is provided with a lock platform 21. The lock seat 1 is provided with a lock groove 11 adapted to the lock platform 21. The load seat 4 is inserted into the lock seat 1. The elastic force of the spring 3 presses the lock platform 21 on the lock arm 2 tightly against the lock groove 11 of the lock seat 1. When the load seat 4 is pulled out from the lock seat 1, the lock arm 2 is moved to make the lock platform 21 disengage from the lock groove 11, and the load seat 4 can be pulled out. The foot pedal 400 is fixedly connected to the load seat 4, and the lock seat 1 is fixedly connected to the drive shaft 500.
[0028] The present invention has two locking arms 2 , the bottom ends of the two locking arms 2 are hinged to the load seat 4 through a pin 43 , and the spring 3 is arranged between the two locking arms 2 to open the two locking arms 2 .
[0029] In order to better position and install the spring 3 between the two locking arms 2 , a positioning hole is provided on each locking arm 2 , and the ends of both sides of the spring 3 are correspondingly placed in the positioning holes on the two locking arms 2 .
[0030] An L-shaped step surface is provided on the outer wall of each locking arm 2 , and the step surface forms a locking platform 21 of the locking arm 2 .
[0031] When the load seat 4 is inserted into the lock seat 1, the two locking arms 2 are first compressed toward each other and the spring 3 is compressed. Then, the load seat 4 is inserted into the lock seat 1 and the two locking arms 2 are released. The spring 3 rebounds and presses the two locking arms 2 into the locking groove 11 in the lock seat 1, thereby achieving locking between the lock seat 1 and the load seat 4.
[0032] In order to better extract the load seat 4 from the lock seat 1, a connecting arm 22 is hinged at the top of each of the two locking arms 2, and the ends of the two connecting arms 22 are hinged to each other, so that the two locking arms 2 and the two connecting arms 22 form a four-bar linkage. A handle 5 is connected at the hinge point of the two connecting arms 22 in the four-bar linkage.
[0033] The locking arm 2 and the connecting arm 22 form a four-bar linkage. Through mechanical mutual linkage, when the load seat 4 is pulled out, it is only necessary to pull up the handle 5, and the two locking arms 2 can move toward each other. The operation of the mechanism is extremely simple, and the locking arm 2 can be "quickly pulled out".
[0034] The load seat 4 in the present invention includes a load arm 41 and a limit block 42, which are fixedly connected by three pins 43. The three pins 43 are distributed in a triangular shape, one of which is placed at the bottom of the limit block 42, and two pins 43 are arranged at the same height at the top of the limit block 42.
[0035] The two locking arms 2 are hinged to each other through the pin shaft 43 at the bottom end. The two locking arms 2 are placed between the carrier arm 41 and the limit block 42 and are located on the inner side of the triangular outline surrounded by the three pin shafts 43. The elastic force of the spring 3 presses the outer wall of the locking arm 2 against the two pin shafts 43 at the upper end.
[0036] The two pins 43 limit the locking arms 2 and keep the spring 3 positioned between the two locking arms 2 without disengaging.
[0037] The pin 43 includes an integrally formed smooth rod portion and a screw rod portion. When the carrier arm 41 and the stopper 42 are fixedly installed, a nut is threadedly connected to the screw rod portion of the pin 43. The bottom end of the locking arm 2 is connected to the smooth rod portion of the pin 43 to achieve hinged connection.
[0038] In order to facilitate better insertion of the load seat 4 into the lock seat 1, a guide sliding surface inclined toward the load arm 41 is provided on the outer wall surface of the limit block 42. Correspondingly, an introduction inclined surface 100 with the same inclined direction as the guide sliding surface is provided on the lock seat 1.
[0039] The limit block 42 in the present invention is a triangular structure, three pins 43 are respectively arranged at the three vertices of the limit block 42 , and a triangular plug-in slot 13 matching the outer contour of the limit block 42 is provided on the lock seat 1 .
[0040] The two waist sides of the inserting groove 13 are provided with locking grooves 11, and the locking grooves 11 are adapted to the shape of the locking platform 21. The rear side end surface of the inserting groove 13 is provided with an introduction inclined surface 100 with the same inclined direction as the guide sliding surface.
[0041] When the load seat 4 is inserted into the lock seat 1, the guide sliding surface and the introduction inclined surface 100 cooperate with each other to facilitate the load seat 4 to slide accurately into the lock seat 1. Since the plug-in slot 13 is a triangular structure, when the two locking arms 2 are inserted into the plug-in slot 13, the triangular structure of the plug-in slot 13 itself can realize the opposite movement of the two locking arms 2 during the plug-in process. No additional external force is required to squeeze and contract the two locking arms 2. The locking arms 2 can be directly inserted into the plug-in slot 13. The locking platform 21 is inserted into the lock slot 11 through the compression and spring-opening of the spring. The "quick insertion" of the locking arms 2 is achieved through the characteristics of the structure itself without the need to apply additional external force.
[0042] An arc groove 110 is provided above each lock groove 11 . When the lock arm 2 is inserted into the lock seat 1 , the two pins 43 at the top of the limit block 42 are placed in the arc groove 110 .
[0043] A shaft sleeve 18 is provided on the outer wall of the lock seat 1 , and the shaft sleeve 18 is fixedly connected to the driving shaft 500 .
[0044] A plurality of mounting slots 410 are provided on the carrying arm 41 , and the footrest 400 is fixed in the mounting slots 410 .
[0045] When the present invention is used as an ankle joint rehabilitation device, the lock seat 1 is connected to the drive shaft 500, and the foot pedal for supporting the sole of the foot is fixed in the mounting slot 410 of the load arm 41. When the patient uses it, the foot pedal can be released from the motor by pulling the handle 5, that is, the load seat 4 and the lock seat 1 are disengaged, which is quick and convenient to use.
[0046] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.
Claims
1. A detachable foot wearable fixing device in a lower limb training device, characterized in that: It comprises a foot pedal (400) and a drive shaft (500), wherein the foot pedal (400) is detachably mounted on the drive shaft (500) by means of quick plug-in and pull-out; The foot pedal (400) is detachably mounted on the drive shaft (500) via a quick plug-in mechanism, the quick plug-in mechanism comprising a lock seat (1), a lock arm (2), a spring (3) and a load seat (4), the lock arm (2) being hinged to the load seat (4), the spring (3) being arranged in the load seat (4), and the free end of the spring (3) being in contact with the lock arm (2), a lock platform (21) being arranged on the lock arm (2), a lock groove (11) matching the lock platform (21) being arranged on the lock seat (1), the load seat (4) and the lock seat (1) being plugged into each other, the elastic force of the spring (3) pressing the lock platform (21) on the lock arm (2) against the lock groove (11) of the lock seat (1), the foot pedal (400) being fixedly connected to the load seat (4), and the lock seat (1) being fixedly connected to the drive shaft (500); The locking arms (2) are provided with two, and the spring (3) is provided between the two locking arms (2) and spreads the two locking arms (2) apart; An L-shaped step surface is provided on the outer wall of each locking arm (2), and the step surface forms a locking platform (21) of the locking arm (2).
2. The detachable foot wear fixing device in the lower limb training device as claimed in claim 1, characterized in that: The bottom ends of the two locking arms (2) are hinged to the load seat (4) via a pin shaft (43).
3. The detachable foot wearable fixing device in the lower limb training device according to claim 1, characterized in that: The locking arm (2) is provided with a positioning hole, and the end of the spring (3) is correspondingly placed in the positioning hole.
4. The detachable foot wearable fixing device in the lower limb training device according to claim 1, characterized in that: A connecting arm (22) is hingedly connected to the top of each of the two locking arms (2), and the ends of the two connecting arms (22) are hingedly connected to each other. The two locking arms (2) and the two connecting arms (22) form a four-bar linkage.
5. The detachable foot wear fixing device in the lower limb training device as claimed in claim 4, characterized in that: A handle (5) is connected at the hinge point of the two connecting arms (22) in the four-bar linkage.
6. The detachable foot wear fixing device in the lower limb training device as claimed in claim 2, characterized in that: The load seat (4) comprises a load arm (41) and a limit block (42), the load arm (41) and the limit block (42) being fixedly connected via three pins (43), the three pins (43) being distributed in a triangular shape, the locking arm (2) being arranged between the load arm (41) and the limit block (42), and the locking arm (2) being located on the inner side of the triangular outline formed by the three pins (43), and the elastic force of the spring (3) causing the outer wall of the locking arm (2) to contact the pins (43).
7. The detachable foot wear fixing device in the lower limb training device as claimed in claim 6, characterized in that: The outer wall surface of the limit block (42) is provided with a guide sliding surface inclined towards the carrying arm (41).
8. The detachable foot wear fixing device in the lower limb training device as claimed in claim 7, characterized in that: The lock seat (1) is provided with an insertion groove (13) adapted to the outer contour of the limit block (42), the insertion groove (13) is provided with locking grooves (11) on two opposite side walls, and a guide inclined surface (100) having the same inclination direction as the guide sliding surface is provided on the side wall surface between the side walls where the locking groove (11) is located.
9. The detachable foot wear fixing device in the lower limb training device as claimed in claim 8, characterized in that: An arc groove (110) for accommodating a pin shaft (43) is provided above each locking groove (11).
10. The detachable foot wearable fixing device in the lower limb training device according to claim 1, characterized in that: A shaft sleeve (18) is provided on the outer wall of the lock seat (1), and the shaft sleeve (18) is fixedly connected to the drive shaft (500).