阅读说明：本技术 全膝关节置换术后康复装置 (Rehabilitation device after total knee joint replacement ) 是由 高心灵 刘佩 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种全膝关节置换术后康复装置,包括设备壳、反转机构、第一脚踏件、第二脚踏件及往复驱动机构,反转机构设在所述的设备壳内,且所述反转机构具有第一驱动端及第二驱动端,所述第一驱动端和第二驱动端的转动方向相反；第一脚踏件和第二脚踏件分别位于所述设备壳的两侧且均连接至所述反转机构；往复驱动机构与所述反转机构连接,用以驱动所述反转机构往复转动,以通过所述反转机构驱动所述第一脚踏件和第二脚踏件朝不同的方向转动并交替执行。根据本发明实施例提供的全膝关节置换术后康复装置,可以实现患者屈伸膝关节的动作,屈膝、伸膝训练充分,膝关节康复训练效果更好,此外,体积小,结构简单,适于在病床上训练使用。(The invention discloses a rehabilitation device after total knee replacement, which comprises an equipment shell, a reversing mechanism, a first pedal piece, a second pedal piece and a reciprocating driving mechanism, wherein the reversing mechanism is arranged in the equipment shell and is provided with a first driving end and a second driving end, and the rotating directions of the first driving end and the second driving end are opposite; the first pedal piece and the second pedal piece are respectively positioned at two sides of the equipment shell and are connected to the reversing mechanism; the reciprocating driving mechanism is connected with the reversing mechanism and used for driving the reversing mechanism to rotate in a reciprocating mode, so that the first pedal piece and the second pedal piece are driven to rotate towards different directions through the reversing mechanism and are alternatively executed. According to the rehabilitation device after total knee replacement provided by the embodiment of the invention, the action of bending and stretching the knee joint of a patient can be realized, the knee bending and stretching training is sufficient, the knee joint rehabilitation training effect is better, in addition, the size is small, the structure is simple, and the rehabilitation device is suitable for being used for training on a sickbed.)

1. A total knee arthroplasty postoperative rehabilitation device, comprising:

an equipment housing;

the reversing mechanism is arranged in the equipment shell and is provided with a first driving end and a second driving end, and the rotating directions of the first driving end and the second driving end are opposite;

a first foot rest and a second foot rest, the first foot rest and the second foot rest being located on either side of the equipment enclosure and both being connected to the inversion mechanism;

and the reciprocating driving mechanism is connected with the reversing mechanism and used for driving the reversing mechanism to rotate in a reciprocating manner, so that the first pedal piece and the second pedal piece are driven by the reversing mechanism to rotate in different directions and are alternatively executed.

2. The post-total knee replacement rehabilitation device of claim 1, wherein the inversion mechanism comprises:

a base mounted within the equipment enclosure;

the middle part of the rotating arm is pivoted with the base so as to be capable of pivoting around a first axis;

the first eccentric rotating part and the second eccentric rotating part are arranged on the base, are respectively positioned on two sides of the first axis and can pivot around a second axis, and the second axis is perpendicular to the first axis;

the linkage mechanism comprises a first L-shaped linkage shaft and a second L-shaped linkage shaft, wherein one end of the first L-shaped linkage shaft is connected with one end of the rotating arm, the other end of the first L-shaped linkage shaft is connected with the eccentric position of the first eccentric rotating part, one end of the second L-shaped linkage shaft is connected with the other end of the rotating arm, and the other end of the second L-shaped linkage shaft is connected with the eccentric position of the second eccentric rotating part;

the first crank handle and the second crank handle are arranged on the same plane, one end of the first crank handle is coaxially and fixedly connected with the first eccentric rotating part, and one end of the second crank handle is coaxially and fixedly connected with the second eccentric rotating part;

the first step member is mounted to the other end of the first crank, and the second step member is mounted to the other end of the second crank.

3. The post-total knee replacement rehabilitation device according to claim 2, wherein one end of the rotating arm is provided with a first engaging hole, the other end of the rotating arm is provided with a second engaging hole, one end of the first L-shaped linkage shaft is engaged with the first engaging hole, and one end of the second L-shaped linkage shaft is engaged with the second engaging hole.

4. The post-total knee replacement rehabilitation device according to claim 2, wherein the first eccentric rotating member is provided with a third engaging hole at an eccentric position, the second eccentric rotating member is provided with a fourth engaging hole at an eccentric position, the other end of the first L-shaped linkage shaft is engaged with the third engaging hole, and the other end of the second L-shaped linkage shaft is engaged with the fourth engaging hole.

5. The post-total knee replacement rehabilitation device according to claim 2, wherein the reciprocating drive mechanism comprises:

the inner side of the gear ring is provided with a plurality of first tooth parts which are arranged at intervals along a half circumference of the gear ring;

a half-toothed gear mounted within the ring gear member and pivotable therewith about a third axis, the third axis being parallel to the first axis; the half-tooth gear is provided with a plurality of second tooth parts which are arranged at intervals along a half circumference of the half-tooth gear, and the second tooth parts are opposite to the first tooth parts;

a driven gear provided between the ring gear member and the half-tooth gear and having a plurality of third tooth portions arranged at intervals along a circumference of the driven ring gear; the driven gear is coaxially and fixedly connected with the rotating arm;

the driving motor is connected with the gear ring piece and the half-tooth gear and used for driving the gear ring piece and the half-tooth gear to synchronously rotate;

when the ring gear and the half-tooth gear rotate synchronously, the first tooth part is meshed with the third tooth part to drive the driven gear to rotate in one of the forward direction and the reverse direction, and after the first tooth part is separated from the third tooth part, the second tooth part is meshed with the first tooth part to drive the driven gear to rotate in the other of the forward direction and the reverse direction.

6. The post-total knee replacement rehabilitation device according to claim 5, wherein the reciprocating driving mechanism further comprises a base, a bearing seat protruding upwards is arranged on the base, and the driven gear is mounted on the bearing seat.

7. The rehabilitation device after total knee replacement according to claim 5, wherein the driven gear is connected to an insertion shaft, the insertion shaft has a non-circular insertion end, and the middle part of the rotating arm is provided with an insertion hole matched with the non-circular insertion end;

the base is installed in the equipment shell through a sliding rail assembly and slides between a first position and a second position; when the base is located at the first position, the inserting shaft is inserted into the inserting hole, and when the base is located at the second position, the inserting shaft is separated from the inserting hole;

and operating parts connected with the base are arranged on two sides of the equipment shell, so that a user can operate the equipment shell to drive the base to switch between a first position and a second position.

8. The post-total knee replacement rehabilitation device according to claim 5, wherein the reciprocating drive mechanism further comprises a sensor for detecting the number of rotations of the half-tooth gear.

9. The post-total knee replacement rehabilitation device according to claim 1, wherein the top surface of the device housing has a slope, and a display screen is disposed on the slope for displaying training time and number of movements.

10. The post-total knee replacement rehabilitation apparatus of claim 1, wherein the first and second footrests are of a pull-through configuration.

Technical Field

The invention relates to rehabilitation training equipment, in particular to a rehabilitation device used after total knee joint replacement.

Background

Total Knee Arthroplasty (TKA) can effectively relieve pain, improve movement and correct deformity, is an effective solution to various end-stage knee joint diseases, and is also a common major orthopedic surgery for elderly patients. With the aging development of population, the demand of patients and operations increases, the particularity of the body of the middle-aged and the old people in perioperative treatment needs to be paid special attention, and the postoperative rehabilitation can be delayed due to the decline of the body function of the old people, the weakening of the lower limb function and muscle strength, the reduction of the stress resistance and the like. The accelerated recovery surgery (ERAS) mode was first proposed by the danish physician Kehlet: effective perioperative treatment measures are adopted to reduce the traumatic stress and complications, and the operation safety and the patient satisfaction are improved. The wide application of ERAS in the orthopedic field in recent years enables knee joint replacement patients to recover early, get out of bed early and discharge early, greatly improves prognosis and achieves early accelerated recovery, but some patients still discharge late for various reasons. Researches show that the hospitalization date and complications of patients are related to various factors, and researches on ERAS related limiting factors and corresponding prevention and treatment measures are adopted to further realize accelerated rehabilitation. Research shows that preoperative training of terminal OA patients can improve prognosis, reduce pain and increase lower limb strength and joint mobility, thereby shortening hospitalization days and accelerating functional recovery. Therefore, the selection of an effective and reasonable rehabilitation scheme is particularly important for improving the rehabilitation effect of the TKA postoperative knee joint function.

The rehabilitation theory of Continuous Passive Motion (CPM) is proposed for more than 40 years from the last 70 th century, the rehabilitation application significance is confirmed clinically, and the CPM is widely applied to rehabilitation treatment after total knee replacement, and the CPM has widely accepted effects of preventing joint adhesion, increasing joint mobility, promoting swelling and fading and the like. There are studies that show that CPM can increase the range of motion of the knee joint to some extent and there is evidence that CPM can reduce pain. Clinical experience shows that the CPM equipment of the related art has insufficient training on bending and extending the knee, causes partial patients of the knee to stretch out and lose the knee and bend out of shape, and has large volume, complex structure and inconvenient use on a sickbed.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a rehabilitation device after total knee replacement.

In order to achieve the above object, a total knee replacement postoperative rehabilitation device according to an embodiment of the present invention includes:

an equipment housing;

the reversing mechanism is arranged in the equipment shell and is provided with a first driving end and a second driving end, and the rotating directions of the first driving end and the second driving end are opposite;

a first foot rest and a second foot rest, the first foot rest and the second foot rest being located on either side of the equipment enclosure and both being connected to the inversion mechanism;

and the reciprocating driving mechanism is connected with the reversing mechanism and used for driving the reversing mechanism to rotate in a reciprocating manner, so that the first pedal piece and the second pedal piece are driven by the reversing mechanism to rotate in different directions and are alternatively executed.

According to the rehabilitation device after total knee joint replacement provided by the embodiment of the invention, the reciprocating driving mechanism drives the reversing mechanism to move, and the first driving end and the second driving end in the reversing mechanism drive the first pedal part and the second pedal part to rotate towards different directions and to be executed alternately, so that the action of bending and stretching the knee joint of a patient can be realized, the knee bending and stretching training is sufficient, the rehabilitation training effect of the knee joint is better, in addition, the size is small, the structure is simple, and the rehabilitation device is suitable for being used for training on a hospital bed.

In addition, the rehabilitation device after total knee replacement according to the above embodiment of the present invention may further have the following additional technical features:

according to one embodiment of the present invention, the reversing mechanism includes:

a base mounted within the equipment enclosure;

the middle part of the rotating arm is pivoted with the base so as to be capable of pivoting around a first axis;

the first eccentric rotating part and the second eccentric rotating part are arranged on the base, are respectively positioned on two sides of the first axis and can pivot around a second axis, and the second axis is perpendicular to the first axis;

the linkage mechanism comprises a first L-shaped linkage shaft and a second L-shaped linkage shaft, wherein one end of the first L-shaped linkage shaft is connected with one end of the rotating arm, the other end of the first L-shaped linkage shaft is connected with the eccentric position of the first eccentric rotating part, one end of the second L-shaped linkage shaft is connected with the other end of the rotating arm, and the other end of the second L-shaped linkage shaft is connected with the eccentric position of the second eccentric rotating part;

the first crank handle and the second crank handle are arranged on the same plane, one end of the first crank handle is coaxially and fixedly connected with the first eccentric rotating part, and one end of the second crank handle is coaxially and fixedly connected with the second eccentric rotating part;

the first step member is mounted to the other end of the first crank, and the second step member is mounted to the other end of the second crank.

According to one embodiment of the invention, one end of the rotating arm is provided with a first sleeving hole, the other end of the rotating arm is provided with a second sleeving hole, one end of the first L-shaped linkage shaft is sleeved with the first sleeving hole, and one end of the second L-shaped linkage shaft is sleeved with the second sleeving hole.

According to an embodiment of the invention, a third sleeve hole is formed in the eccentric position of the first eccentric rotating member, a fourth sleeve hole is formed in the eccentric position of the second eccentric rotating member, the other end of the first L-shaped linkage shaft is sleeved with the third sleeve hole, and the other end of the second L-shaped linkage shaft is sleeved with the fourth sleeve hole.

According to one embodiment of the invention, the reciprocating drive mechanism comprises:

the inner side of the gear ring is provided with a plurality of first tooth parts which are arranged at intervals along a half circumference of the gear ring;

a half-toothed gear mounted within the ring gear member and pivotable therewith about a third axis, the third axis being parallel to the first axis; the half-tooth gear is provided with a plurality of second tooth parts which are arranged at intervals along a half circumference of the half-tooth gear, and the second tooth parts are opposite to the first tooth parts;

a driven gear provided between the ring gear member and the half-tooth gear and having a plurality of third tooth portions arranged at intervals along a circumference of the driven ring gear; the driven gear is coaxially and fixedly connected with the rotating arm;

the driving motor is connected with the gear ring piece and the half-tooth gear and used for driving the gear ring piece and the half-tooth gear to synchronously rotate;

when the ring gear and the half-tooth gear rotate synchronously, the first tooth part is meshed with the third tooth part to drive the driven gear to rotate in one of the forward direction and the reverse direction, and after the first tooth part is separated from the third tooth part, the second tooth part is meshed with the first tooth part to drive the driven gear to rotate in the other of the forward direction and the reverse direction.

According to one embodiment of the invention, the reciprocating driving mechanism further comprises a base, a bearing seat protruding upwards is arranged on the base, and the driven gear is mounted on the bearing seat.

According to one embodiment of the invention, the driven gear is connected to an insertion shaft, the insertion shaft is provided with a non-circular insertion end, and the middle part of the rotating arm is provided with an insertion hole matched with the non-circular insertion end;

the base is installed in the equipment shell through a sliding rail assembly and slides between a first position and a second position; when the base is located at the first position, the inserting shaft is inserted into the inserting hole, and when the base is located at the second position, the inserting shaft is separated from the inserting hole;

and operating parts connected with the base are arranged on two sides of the equipment shell, so that a user can operate the equipment shell to drive the base to switch between a first position and a second position.

According to one embodiment of the invention, the reciprocating drive mechanism further comprises a sensor to detect the number of revolutions of the half-tooth gear.

According to one embodiment of the present invention, the top surface of the device housing has an inclined surface, and the inclined surface is provided with a display screen for displaying training time and action times.

According to one embodiment of the present invention, the first footrest member and the second footrest member are of a sleeve-type construction.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of a post-total knee replacement rehabilitation device according to the present invention;

FIG. 2 is a schematic view of the internal structure of an embodiment of the rehabilitation device after total knee replacement according to the present invention;

FIG. 3 is a schematic structural diagram of a reciprocating drive mechanism in an embodiment of the rehabilitation device after total knee replacement according to the present invention;

FIG. 4 is a schematic structural view of another embodiment of the post-total knee replacement rehabilitation device of the present invention;

FIG. 5 is a schematic view of the internal structure of one embodiment of the post-total knee replacement rehabilitation device of the present invention with the reversing mechanism in the first position;

FIG. 6 is a schematic view of the internal structure of one embodiment of the post-total knee replacement rehabilitation device of the present invention with the inversion mechanism in the second position.

Reference numerals:

10. a reversing mechanism;

101. a base;

102. a rotating arm;

103. a first eccentric rotating member;

104. a second eccentric rotating member;

105. a first L-shaped linkage shaft;

106. a second L-shaped linkage shaft;

107. a first crank;

108. a second crank;

109. an operating member;

20. an equipment housing;

21. a display screen;

22. pressing a key;

30. a first footrest member;

31. a second footrest member;

40. a reciprocating drive mechanism;

401. a ring gear member;

4011. a first tooth portion;

402. a half-tooth gear;

4021. a second tooth portion;

403. a driven gear;

4031. a third gear;

404. a drive motor;

405. a plug shaft;

4051. a non-circular splicing end;

406. a base.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one skilled in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of protection of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The total knee replacement postoperative rehabilitation device according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 3, a rehabilitation apparatus after total knee replacement according to an embodiment of the present invention includes a device housing 20, a reverse mechanism 10, a first step member 30, a second step member 31, and a reciprocating driving mechanism 40.

Specifically, the reversing mechanism 10 is disposed in the device housing 20, and the reversing mechanism 10 has a first driving end and a second driving end, and the first driving end and the second driving end rotate in opposite directions, that is, the first driving end and the second driving end can rotate in opposite directions.

The first and second footrests 30 and 31 are respectively located at both sides of the device case 20 and are connected to the reversing mechanism 10, and the first and second footrests 30 and 31 can be respectively provided for two soles of the patient to step on. When the first driving end and the second driving end can rotate in opposite directions, the first pedal member 30 and the second pedal member 31 can be driven to rotate in opposite directions, so that the two knee joints can move in different directions similar to the direction of a bicycle, and the flexion and extension actions can be completed in the process.

The reciprocating driving mechanism 40 is connected with the reversing mechanism 10 for driving the reversing mechanism 10 to rotate in a reciprocating manner, so that the first pedal member 30 and the second pedal member 31 are driven to rotate in different directions by the reversing mechanism 10 and are alternately executed.

In a specific use, the reciprocating drive mechanism 40 moves in one direction before the inversion mechanism 10 rotates, and at this time, the first driving end rotates downward and the second driving end rotates upward, and correspondingly, the first pedal 30 rotates downward and the second pedal 31 rotates upward, so that one knee joint of the patient is extended and the other knee joint is bent; then, the reciprocating driving mechanism 40 moves in the other direction (the opposite direction) before the reversing mechanism 10 rotates, at this time, the first driving end rotates upward, the second driving end rotates downward, and correspondingly, the first pedal 30 rotates upward and the second pedal 31 rotates downward, so that one knee joint of the patient bends and the other knee joint of the patient extends, and thus, the alternate flexion and extension exercise can be realized, and the alternate flexion and extension exercise can achieve better rehabilitation exercise effect.

According to the rehabilitation device after total knee replacement provided by the embodiment of the invention, the reciprocating driving mechanism 40 drives the reversing mechanism 10 to move, and the first driving end and the second driving end in the reversing mechanism 10 are used for driving the first pedal part 30 and the second pedal part 31 to rotate towards different directions and to be executed alternately, so that the action of bending and extending the knee joint of a patient can be realized, the knee bending and extending training is sufficient, the knee joint rehabilitation training effect is better, in addition, the size is small, the structure is simple, and the rehabilitation device is suitable for being used for training on a sickbed.

Referring to fig. 2, in some embodiments of the present invention, the reversing mechanism 10 includes a base 101, a rotating arm 102, a first eccentric rotating member 103, a second eccentric rotating member 104, a first L-shaped linkage shaft 105, a second L-shaped linkage shaft 106, a first crank 107, and a second crank 108.

The base 101 is mounted within the device housing 20. The middle part of the rotating arm 102 is pivotally connected to the base 101 to be pivotable about a first axis, that is, the rotating arm 102 is pivotable on the base 101 about the first axis, and since the middle part of the rotating arm 102 is pivotally connected to the base 101, the rotating direction of the two ends of the rotating arm 102 is different when the rotating arm 102 rotates.

A first eccentric rotation member 103 and a second eccentric rotation member 104 are provided on the base 101 and are respectively located on both sides of the first axis and are pivotable about a second axis perpendicular to the first axis.

One end of a first L-shaped linkage shaft 105 is connected with one end of the rotating arm 102, the other end of the first L-shaped linkage shaft 105 is connected with the eccentric position of the first eccentric rotating part 103, one end of a second L-shaped linkage shaft 106 is connected with the other end of the rotating arm 102, and the other end of the second L-shaped linkage shaft 106 is connected with the eccentric position of the second eccentric rotating part 104.

One end of the first crank 107 is coaxially and fixedly connected to the first eccentric rotating member 103, and one end of the second crank 108 is coaxially and fixedly connected to the second eccentric rotating member 104. The first footrest member 30 is mounted on the other end of the first crank 107, and the second footrest member 31 is mounted on the other end of the second crank 108. The first crank 107 and the second crank 108 serve as the first drive end and the second drive end, respectively.

When the reciprocating driving mechanism 40 drives the rotating arm 102 to rotate in one direction, two ends of the rotating arm 102 respectively drive the first L-shaped linkage shaft 105 to rotate downwards and the second L-shaped linkage shaft 106 to rotate upwards, so that the first L-shaped linkage shaft 105 further drives the first eccentric rotating member 103 to rotate downwards, the second L-shaped linkage shaft 106 drives the second eccentric rotating member 104 to rotate upwards, and thus, the first crank 107 and the first pedal member 30 can be driven to move downwards, and the second crank 108 and the second pedal member 31 can move upwards.

When the reciprocating driving mechanism 40 drives the rotating arm 102 to rotate in the other direction, two ends of the rotating arm 102 respectively drive the first L-shaped linkage shaft 105 to rotate upwards and the second L-shaped linkage shaft 106 to rotate downwards, so that the first L-shaped linkage shaft 105 further drives the first eccentric rotating member 103 to rotate upwards, the second L-shaped linkage shaft 106 drives the second eccentric rotating member 104 to rotate downwards, and thus, the first crank 107 and the first pedal 30 can be driven to move upwards, and the second crank 108 and the second pedal 31 can move downwards.

Thus, the reversing mechanism 10 can drive the first and second pedals 30 and 31 to alternately reverse each other, and the movement is stable and reliable, and the structure is simple.

Advantageously, one end of the rotating arm 102 is provided with a first nesting hole, the other end of the rotating arm 102 is provided with a second nesting hole, one end of the first L-shaped linkage shaft 105 is nested with the first nesting hole, and one end of the second L-shaped linkage shaft 106 is nested with the second nesting hole.

First eccentric rotation piece 103 eccentric position is equipped with the third and overlaps the hole, second eccentric rotation piece 104 eccentric position is equipped with the fourth and overlaps the hole, the other end of first L type universal driving shaft 105 with the third overlaps the hole and cup joints, the other end of second L type universal driving shaft 106 with the fourth overlaps the hole and cup joints.

That is, the first coupling hole and the third coupling hole are respectively coupled to two ends of the first L-shaped linkage shaft 105, and the second coupling hole and the fourth coupling hole are respectively coupled to two ends of the second L-shaped linkage shaft 106, so that the first L-shaped linkage shaft 105, the second L-shaped linkage shaft 106, the first eccentric rotating member 103, and the second eccentric rotating member 104 are conveniently connected.

In one embodiment of the present invention, the reciprocating drive mechanism 40 includes a ring gear member 401, a half-tooth gear 402, a driven gear 403, and a drive motor 404.

The inner side of the ring gear 401 has a plurality of first teeth 4011, and the first teeth 4011 are spaced along a half circumference of the ring gear 401.

A half-toothed gear 402 is mounted within the ring gear member 401 and is pivotable with the ring gear member 401 about a third axis, which is parallel to the first axis; the half-tooth gear 402 has a plurality of second teeth 4021, the plurality of second teeth 4021 are arranged at intervals along a half circumference of the half-tooth gear 402, and the plurality of second teeth 4021 are opposite to the plurality of first teeth 4011.

A driven gear 403 is provided between the ring gear member 401 and the half-tooth gear 402 and has a plurality of third teeth 4031, and the plurality of third teeth 4031 are arranged at intervals along the circumference of the driven ring gear; the driven gear 403 is coaxially and fixedly connected with the rotating arm 102.

The driving motor 404 is connected with the gear ring member 401 and the half-tooth gear 402, and is used for driving the gear ring member 401 and the half-tooth gear 402 to rotate synchronously.

When the ring gear 401 and the half-tooth gear 402 rotate synchronously, the first tooth portion 4011 is engaged with the third tooth portion 4031 to drive the driven gear 403 to rotate in one of the forward direction and the reverse direction, and after the first tooth portion 4011 is disengaged from the third tooth portion 4031, the second tooth portion 4021 is engaged with the first tooth portion 4011 to drive the driven gear 403 to rotate in the other of the forward direction and the reverse direction.

Since the first teeth 4011 on the ring gear member 401 and the second teeth 4021 on the half-tooth gear 402 are oppositely arranged, only one of the first teeth 4011 on the ring gear member 401 and the second teeth 4021 on the half-tooth gear 402 meshes with the third teeth 4031 of the driven gear 403 when the ring gear member 401 and the half-tooth gear 402 rotate synchronously, the first gear can be driven to rotate in one direction when the first teeth 4011 meshes with the third teeth 4031, and the first gear can be driven to rotate in the other direction when the second teeth 4021 meshes with the third teeth 4031.

In a specific use, initially, the first tooth portion 4011 of the ring gear member 401 is engaged with the third tooth portion 4031 of the driven gear 403, and the ring gear member 401 rotates to drive the driven gear 403 to rotate in one direction, at this time, the driven gear 403 can further drive the rotating arm 102 to rotate in one direction, and along with the rotation of the ring gear member 401, when the last first tooth portion 4011 of the ring gear member 401 is disengaged from the third tooth portion 4031 of the driven gear 403, the second tooth portion 4021 of the half-tooth gear 402 is engaged with the third tooth portion 4031 of the driven gear 403, and the rotation of the half-tooth gear 402 can drive the driven gear 403 to rotate in another direction (reverse direction), at this time, the driven gear 403 can further drive the rotating arm 102 to rotate in another direction, so that the forward and reverse alternate rotation of the rotating arm 102 can be realized, and correspondingly, the alternate rotation of the first pedal member 30 and the second pedal member 31 can be realized, the device has simple structure, ingenious design and reliable and stable alternate motion.

Advantageously, the reciprocating drive mechanism 40 further comprises a base 406, and the base 406 is provided with a bearing seat protruding upwards, and the driven gear 403 is mounted on the bearing seat, so that the driven gear 403 can be reliably mounted and can also stably and reliably rotate.

In one embodiment of the present invention, the driven gear 403 is connected to a plug shaft 405, the plug shaft 405 has a non-circular plug end 4051, and the middle portion of the rotating arm 102 is provided with a plug hole matching with the non-circular plug end 4051.

The base 101 is mounted in the device housing 20 by a slide assembly and slides between a first position and a second position; when the base 101 is located at the first position, the plug shaft 405 is plugged into the plug hole, and when the base 101 is located at the second position, the plug shaft 405 is separated from the plug hole.

The device housing 20 is provided with an operating member 109 connected to the base 101 at two sides thereof for being operated by a user to drive the base 101 to switch between the first position and the second position.

That is, the base 101 may slide so that the reversing mechanism 10 may move in a direction to approach or separate from the reciprocating drive mechanism 40. When the reversing mechanism 10 moves to the first position in the direction approaching the reciprocating drive mechanism 40, the insertion end of the insertion shaft 405 in the reciprocating drive mechanism 40 is inserted into the insertion hole of the rotary arm 102 in the reversing mechanism 10, so that the rotary arm 102 can be driven, and this driving method by the reciprocating drive mechanism 40 is called passive training. When the reversing mechanism 10 moves to the second position in the direction away from the reciprocating driving mechanism 40, the inserting end of the inserting shaft 405 in the reciprocating driving mechanism 40 is separated from the inserting hole on the rotating arm 102 in the reversing mechanism 10, the rotating arm 102 cannot rotate automatically, and the training can be completed only by the patient stepping on the first pedal 30 and the second pedal 31, which is called active training, i.e. requiring the patient to move, so that the free switching between the passive training and the active training can be realized, and the problems of falling of the muscle strength of the limbs, unfavorable joint stability and the like caused by dependence due to long-time use of the passive training can be avoided.

In practical use, the reversing mechanism 10 can be manually slid to the first position or the second position through the holding operation member 109 as required, so that the switching between the passive training and the active training is realized, and the switching is convenient and simple.

In an embodiment of the present invention, the reciprocating driving mechanism 40 further includes a sensor for detecting the number of rotations of the half-tooth gear 402, the sensor may employ a switch member such as an optical coupler, and the number of rotations of the half-tooth gear 402 is recorded to count the number of times of training.

Advantageously, the top surface of the device housing 20 has an inclined surface, and the inclined surface is provided with a display screen 21 for displaying the training time and the number of movements, so that the user can know the training condition through the screen conveniently.

In addition, a button 22, such as a reset button 22, is disposed on the device housing 20, and can be used to reset the reciprocating driving motor 404, so that the insertion shaft 405 can be restored to the initial angle, and thus, the insertion with the insertion hole can be facilitated.

Advantageously, the first and second footrests 30, 31 are of a pull-on construction, such that in use, the sole of the patient extends over the first and second footrests 30, 31 to facilitate the training operation.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.