Upper limb rehabilitation training equipment

Abstract

The present invention discloses an upper limb rehabilitation training device, comprising an upper arm sleeve, wherein a switching mechanism is arranged on the upper arm sleeve, the top plate is mounted on the side surface of the upper arm sleeve, a follower plate 1 is fitted on the lower end surface of the top plate, and a small arm sleeve is mounted on the follower plate 1. The switching mechanism realizes flexible switching of the upper limb rehabilitation training device between unidirectional resistance and reverse resistance through the coordinated work of components such as the top plate, the follower plate 1, the small arm sleeve, the bottom sleeve, the tightening spring and the fitting ring. The design of the internal rod and the internal ring provides a stable supporting structure, and the cooperation of the friction rod and the elastic strip realizes the adjustment of the resistance size. The combined design of the rotating rod, the top block and the receiving rod allows flexible adjustment of the initial angle, and the setting of the meshing disk and the stop disk further enhances the stability of the angle adjustment. These designs jointly improve the adaptability and effect of the rehabilitation training, and significantly improve the pertinence and effectiveness of the training.

Description

Technical Field

[0001] The present invention relates to the technical field of upper limb rehabilitation training, and more specifically, to an upper limb rehabilitation training device. Background Art

[0002] In the current field of medical rehabilitation, upper limb rehabilitation training equipment is an important auxiliary tool and is widely used in various rehabilitation centers and medical institutions. However, existing upper limb rehabilitation training equipment has limitations in functional design. These devices can usually only provide a single training mode, either focusing on strength training when the forearm contracts, or muscle training when the forearm expands. In the forearm contraction mode, even in the rebound phase, the device still maintains resistance in the contraction direction and cannot simulate the expansion needs in actual exercise. The other mode only provides resistance when the forearm contracts, and converts it to force in the expansion direction when expanding. This single force direction switching cannot fully exercise the patient's muscle groups. This design deficiency seriously limits the effect and flexibility of rehabilitation training.

[0003] This single-function design not only fails to meet the personalized rehabilitation needs of different patients, but may also affect the overall effect of rehabilitation training. Due to the lack of flexibility in mode switching, it is difficult for medical staff to adjust the training plan in a timely manner according to the patient's rehabilitation progress and specific circumstances, thus affecting the convenience of rehabilitation training. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the problems existing in the prior art, the present invention provides an upper limb rehabilitation training device to solve the technical problems mentioned in the background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an upper limb rehabilitation training device, comprising an upper arm sleeve, the upper arm sleeve is provided with a switching mechanism, the switching mechanism comprises a top plate, a follower plate 1, a lower arm sleeve, a bottom sleeve, a tightening spring, a fitting ring, an inner rod, an inner ring, a friction rod, an elastic strip, a variable resistance mechanism and a holding mechanism, the top plate is mounted on the side of the upper arm sleeve, the follower plate 1 is fitted on the lower end surface of the top plate, the lower arm sleeve is mounted on the follower plate 1, the bottom sleeve is fixedly mounted on the upper end surface of the top plate, a tightening spring is installed on the bottom sleeve, and the fitting ring is provided with Multiple, and multiple fitting rings are equidistantly installed on the tightening spring, multiple internal rods are equidistantly installed on the top plate, multiple internal rods are installed with internal rings on their upper end surfaces, multiple fitting rings are nested on multiple internal rods, each fitting ring is respectively provided with multiple fixing grooves, each fixing groove is respectively provided with a vertical groove, multiple fixing grooves are respectively slidably connected with friction rods, an elastic strip is installed between two friction rods, the elastic strip is slidably connected to the inner wall of the vertical groove, the variable resistance mechanism is installed on the upper arm sleeve, and the holding mechanism is installed on the lower arm sleeve.

[0008] The present invention is further configured as follows: a rotating rod is provided on the follower plate, the rotating rod is rotatably connected to the top plate, a top block is coaxially provided on the rotating rod, a top disk is provided on the upper end of the tightening spring, the top disk and the rotating rod are coaxially arranged, a receiving rod is coaxially provided on the rotating rod, an adjustment sleeve is slidably provided on the receiving rod, a plurality of insertion rods are equidistantly provided on the side wall of the adjustment sleeve, a plurality of internal grooves are equidistantly provided on the side wall of the top block, a plurality of external grooves are provided on the inner wall of the top disk, the insertion rod is slidably connected in the external grooves and the internal grooves, the number of external grooves is greater than the number of internal grooves, this design realizes the adjustment of the initial angle through the cooperation of the rotating rod and the top block, the setting of the adjustment sleeve and the insertion rod provides a flexible angle locking function, the difference in the number of internal grooves and external grooves increases the accuracy of the adjustment, and the overall structure improves the adaptability and accuracy of rehabilitation training.

[0009] The present invention is further configured as follows: an engaging disk is provided on the adjustment sleeve, the engaging disk and the receiving rod are coaxially arranged, a stop disk is coaxially arranged on the receiving rod, a plurality of push rods are equidistantly arranged on the engaging disk, a plurality of limiting rings are coaxially arranged on each of the push rods, a receiving disk is provided on the stop disk, and a plurality of stop grooves are equidistantly arranged on the receiving disk. This design achieves the control of initial angle adjustment through the cooperation of the engaging disk and the stop disk, the setting of the push rod and the limiting ring provides multi-level adjustment options, and the design of the stop groove further enhances the stability of the adjustment, thereby improving the accuracy and reliability of rehabilitation training as a whole.

[0010] The present invention is further configured such that a plurality of return springs are equidistantly provided on the upper end surface of the engaging disk, and a resistance ring is respectively provided on the plurality of return springs, and the resistance ring is pressed against the lower end surface of the stop disk. This design provides an automatic return function through the cooperation of the return spring and the resistance ring, thereby ensuring the stability and reliability of the adjustment mechanism and greatly improving the safety and convenience of rehabilitation training.

[0011] The present invention is further configured as follows: the variable resistance mechanism includes a follower plate 2, a bottom plate, a telescopic rod, a telescopic disk and a stretching spring. The follower plate 2 is installed on the forearm sleeve, the bottom plate is installed on the upper arm sleeve, and the follower plate 2 is attached to the forearm sleeve. A plurality of telescopic rods are provided, and the plurality of telescopic rods are respectively installed on the bottom plate. A plurality of telescopic disks are provided, and the plurality of telescopic disks are respectively slidably connected to the telescopic rods. A plurality of stretching springs are respectively installed on each of the telescopic disks, and the plurality of stretching springs respectively abut against the next telescopic disk. This design achieves precise control of reverse resistance through the cooperation of the telescopic rod and the telescopic disk. The setting of the stretching spring provides elastic support. When friction is not required, the plurality of telescopic disks will not fit each other. The overall structure greatly improves the diversity and effect of rehabilitation training.

[0012] The present invention is further configured such that a positioning rod is provided on the lower end surface of the follower plate 2, a friction disk is provided between every two of the telescopic disks, a positioning groove is provided on each of the friction disks, and the positioning rod is slidably connected in the plurality of positioning grooves. This design realizes power transmission through the cooperation of the positioning rod and the positioning groove, thereby improving the accuracy and adaptability of rehabilitation training as a whole.

[0013] The present invention is further configured as follows: a fixed plate is provided on the multiple telescopic rods, a mounting sleeve is fixedly provided on the fixed plate, a push tube is slidably provided in the mounting sleeve, a push spring is provided on the push tube, a push ring is provided on the push spring, the push ring abuts against the friction plate at the lower end, a plurality of transverse holes are equidistantly provided on the side wall of the mounting sleeve, a clamping rod is slidably provided in the transverse holes, a plurality of annular grooves are equidistantly provided on the push tube, the clamping rod is clamped in the annular groove, this design realizes the adjustment of the resistance size through the cooperation of the push tube and the push spring, the setting of the clamping rod and the annular groove provides a multi-level locking function, and the overall structure greatly improves the flexibility and accuracy of rehabilitation training.

[0014] The present invention is further configured such that each of the clamping rods is provided with a follower ball, the follower ball is provided with a tension spring, the tension spring is connected to the side wall of the mounting sleeve, the upper and lower ends of the mounting sleeve are respectively slidably provided with a two-way sleeve, each of the two-way sleeves is respectively provided with an expansion sleeve, a plurality of springs are provided between the two expansion sleeves, a plurality of lateral grooves are opened on the side wall of the two-way sleeve, the clamping rod is slidably connected in the lateral groove, this design realizes automatic return of the clamping rod through the cooperation of the follower ball and the tension spring, and the setting of the two-way sleeve and the expansion sleeve provides additional adjustment options, thereby improving the safety and diversity of rehabilitation training as a whole.

[0015] The present invention is further configured such that an inner groove is provided on the upper arm sleeve, an external plate is slidably provided in the inner groove, and the external plate is mounted on an external device. This design realizes the rotational connection of the device through the cooperation of the inner groove and the external plate.

[0016] The present invention is further configured as follows: the holding mechanism includes an extension plate, a handle, a conical spring and a grip sleeve, the extension plate is mounted on the forearm sleeve, the handle is mounted on the extension plate, the grip sleeve is rotatably connected to the handle, and the two ends of the conical spring are respectively connected to the handle and the grip sleeve. This design realizes the grip training function through the cooperation of the handle and the grip sleeve, and the setting of the conical spring provides resistance. The overall structure ensures the comprehensiveness and effectiveness of the rehabilitation training.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides an upper limb rehabilitation training device, which has the following beneficial effects:

[0019] 1. The switching mechanism realizes the flexible switching of the upper limb rehabilitation training equipment between the same direction resistance and the reverse resistance through the coordinated work of components such as the top plate, the follower plate, the forearm sleeve, the bottom sleeve, the tightening spring and the fitting ring. The design of the internal rod and the internal ring provides a stable support structure, and the cooperation of the friction rod and the elastic strip realizes the adjustment of the resistance size. The combined design of the rotating rod, the top block and the receiving rod allows flexible adjustment of the initial angle. The setting of the engagement disk and the stop disk further enhances the stability of the angle adjustment. These designs jointly improve the adaptability and effect of rehabilitation training, enable the equipment to better meet the personalized needs of different patients in the rehabilitation process, and significantly improve the pertinence and effectiveness of training.

[0020] 2. The variable resistance mechanism is mainly composed of follower plate 2, bottom plate, telescopic rod, telescopic disc and expansion spring. Through the ingenious cooperation of these components, precise control of reverse resistance is achieved. The design of positioning rod and positioning groove ensures the stability of motion trajectory. The staggered setting of friction disc and telescopic disc greatly increases the friction area, thereby providing stronger resistance. The combination of push tube, push spring and push ring allows flexible adjustment of resistance size. The design of clamping rod, follower ball and tension spring further enhances the accuracy and reliability of adjustment. The configuration of bidirectional sleeve and expansion sleeve ensures the convenience of unlocking. The synergistic effect of these components not only realizes the control of reverse resistance, but also optimizes the safety performance of the whole system, thereby significantly improving the effect and safety of rehabilitation training.

[0021] 3. The gripping mechanism includes components such as an extension plate, a handle, a conical spring and a grip sleeve. Its design focuses on realizing the integration of grip training functions. The configuration of the extension plate and the handle provides stable grip support. The combined design of the conical spring and the grip sleeve realizes the resistance adjustment of grip training. This design not only expands the scope of rehabilitation training, organically combines upper limb movement training and grip training, but also enhances the versatility and practicality of the entire equipment, thereby significantly improving the comprehensiveness and efficiency of rehabilitation training, so that patients can complete more comprehensive upper limb rehabilitation training on one device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an upper limb rehabilitation training device in the present invention;

[0023] Figure 2 It is a schematic diagram of the explosion structure of the top plate and the tightening spring in the present invention;

[0024] Figure 3 It is a schematic diagram of the explosion structure of the tightening spring and the friction rod in the present invention;

[0025] Figure 4 It is a schematic diagram of the explosion structure of the top plate and the top block in the present invention;

[0026] Figure 5 It is a schematic cross-sectional structural diagram of the adjustment sleeve in the present invention;

[0027] Figure 6 It is a structural schematic diagram of the variable resistance mechanism in the present invention;

[0028] Figure 7 It is a cross-sectional structural schematic diagram of the variable resistance mechanism in the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the telescopic disc and the friction disc in the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the installation sleeve in the present invention;

[0031] Fig.10 It is a cross-sectional structural schematic diagram of the installation sleeve in the present invention;

[0032] Fig.11 It is a schematic diagram of the explosion structure of the upper arm sleeve and the external plate in the present invention;

[0033] Fig.12 It is a schematic diagram of the structure of the holding mechanism in the present invention.

[0034] In the figure: 1, big arm sleeve; 2, top plate; 3, follower plate 1; 4, small arm sleeve; 5, bottom sleeve; 6, tightening spring; 7, fitting ring; 8, inner rod; 9, inner ring; 10, friction rod; 11, elastic strip; 12, fixed groove; 13, vertical groove; 14, rotating rod; 15, top block; 16, top plate; 17, receiving rod; 18, adjusting sleeve; 19, inserting rod; 20, inner groove; 21, outer groove; 22, meshing plate; 23, stop plate; 24, push rod; 25, limit ring; 26, receiving plate; 27, stop groove; 28, return spring; 29, stop Touch ring; 30, follower plate 2; 31, bottom plate; 32, telescopic rod; 33, telescopic disk; 34, expansion spring; 35, positioning rod; 36, friction disk; 37, positioning groove; 38, fixed disk; 39, installation sleeve; 40, push tube; 41, push spring; 42, push ring; 43, transverse hole; 44, clamping rod; 45, annular groove; 46, follower ball; 47, tension spring; 48, two-way sleeve; 49, expansion sleeve; 50, spring; 51, lateral groove; 52, embedded groove; 53, external plate; 54, extension plate; 55, handle; 56, conical spring; 57, grip sleeve. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0037] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0038] See also Figures 1 to 5A kind of upper limb rehabilitation training equipment comprises an upper arm sleeve 1, and a switching mechanism is arranged on the upper arm sleeve 1, and the switching mechanism comprises a top plate 2, a follower plate 3, a small arm sleeve 4, a bottom sleeve 5, a tightening spring 6, a fitting ring 7, an inner rod 8, an inner ring 9, a friction rod 10, an elastic strip 11, a variable resistance mechanism and a holding mechanism, the top plate 2 is mounted on the side of the upper arm sleeve 1, the follower plate 3 is fitted on the lower end surface of the top plate 2, the small arm sleeve 4 is mounted on the follower plate 3, the bottom sleeve 5 is fixedly mounted on the upper end surface of the top plate 2, a tightening spring 6 is installed on the bottom sleeve 5, and a plurality of fitting rings 7 are provided, and a plurality of fitting rings 7 are provided. The rings 7 are equidistantly mounted on the tightening spring 6, a plurality of internal rods 8 are equidistantly mounted on the top plate 2, an internal ring 9 is mounted on the upper end surfaces of the plurality of internal rods 8, a plurality of fitting rings 7 are respectively nested on the plurality of internal rods 8, a plurality of fixing grooves 12 are respectively opened on each fitting ring 7, a vertical groove 13 is respectively opened on each fixing groove 12, a friction rod 10 is respectively slidably connected in the plurality of fixing grooves 12, an elastic strip 11 is installed between the two friction rods 10, and the elastic strip 11 is slidably connected to the inner wall of the vertical groove 13, the variable resistance mechanism is mounted on the upper arm sleeve 1, the holding mechanism is mounted on the lower arm sleeve 4, and the follower plate A rotating rod 14 is provided on the top plate 2, and the rotating rod 14 is rotatably connected to the top plate 2. A top block 15 is coaxially provided on the rotating rod 14. A top disk 16 is provided on the upper end of the tightening spring 6. The top disk 16 and the rotating rod 14 are coaxially arranged. A receiving rod 17 is coaxially provided on the rotating rod 14. An adjusting sleeve 18 is slidably provided on the receiving rod 17. A plurality of insertion rods 19 are equidistantly provided on the side wall of the adjusting sleeve 18. A plurality of internal grooves 20 are equidistantly provided on the side wall of the top block 15. A plurality of external grooves 21 are provided on the inner wall of the top disk 16. The insertion rod 19 is slidably connected in the external grooves 21 and the internal grooves 20. The number of the outer grooves 21 is greater than the number of the internal grooves 20, and an engaging disk 22 is provided on the adjusting sleeve 18. The engaging disk 22 and the receiving rod 17 are coaxially arranged, and a stop disk 23 is coaxially arranged on the receiving rod 17. A plurality of push rods 24 are equidistantly arranged on the engaging disk 22, and each push rod 24 is coaxially provided with a plurality of limit rings 25, and a receiving disk 26 is provided on the stop disk 23, and a plurality of stop grooves 27 are equidistantly provided on the receiving disk 26, and a plurality of return springs 28 are equidistantly arranged on the upper end surface of the engaging disk 22, and a plurality of return springs 28 are respectively provided with resistance rings 29, and the resistance rings 29 are pressed against the lower end surface of the stop disk 23.

[0039] Working principle: When it is necessary to achieve the same direction of resistance for contraction and expansion of the arm, firstly adjust the strength of the training to be required, firstly slide the two friction rods 10 into the fixing grooves 12 respectively, and when a larger training strength is required, insert the friction rods 10 into multiple fixing grooves 12. Since the elastic strips 11 will apply corresponding pulling force to the two friction rods 10, the friction rods 10 are respectively pinched into the fixing grooves 12 on both sides, thereby ensuring the fixation of the friction rods 10 and the corresponding fitting rings 7. At this time, the fitting rings 7 at the connected position can only rotate synchronously. Therefore, the tightening spring 6 at the connected position is in a fixed state, the fixing sleeve is fixedly installed on the top plate 2, and the rotating rod 14 is connected to the top plate 16. Therefore, when the arm drives the forearm sleeve 4 to rotate along the upper arm sleeve 1, the tightening spring 6 will also rotate accordingly, and the corresponding elastic force will be applied by the tightening spring 6. When the arm contracts and expands, the same direction of resistance will be applied, and then the training effect is guaranteed. Since the tightening spring 6 at the corresponding position is in a fixed state after different numbers of fitting rings 7 are fixed, the stiffness coefficient of the tightening spring 6 will be changed. Since k = (G* d^4) / (8 * D^3 * N);

[0040] Where: G = shear modulus of the material d = wire diameter D = average diameter of the spring N = number of active turns;

[0041] Therefore, when the effective number of turns N is changed, the stiffness coefficient of the tightening spring 6 will increase, and thus the stiffness coefficient of the tightening spring 6 can be changed by changing the friction rod 10 to be connected in different fixing grooves 12. Since the deformation amount is the same each time, changing the stiffness coefficient can change the resistance each time the forearm rotates, thereby meeting the corresponding training requirements.

[0042] When it is necessary to change the initial fixed position of the upper arm sleeve 1 and the lower arm sleeve 4, first pull the engaging disk 22 upward, then release the clamping connection between the insertion rod 19 and the inner groove 20 and the outer groove 21, then pass the limiting ring 25 through the receiving disk 26, and then rotate the engaging disk 22 so that the limiting ring 25 is clamped in the stop groove 27, thereby ensuring the limitation of the engaging disk 22, and then ensuring the relative rotation between the rotating rod 14 and the fitting ring 7. When the angle adjustment is completed, release the clamping connection between the limiting ring 25 and the stop groove 27, and under the thrust of the return spring 28, the insertion rod 19 is clamped in the inner groove 20 and the outer groove 21, thereby ensuring the change of the initial angle, thereby meeting the different requirements of rehabilitation training.

[0043] In order to achieve the reverse resistance of arm contraction and expansion, a variable resistance mechanism is added. Figures 6 to 10The variable resistance mechanism includes a follower plate 30, a bottom plate 31, a telescopic rod 32, a telescopic disc 33 and a stretching spring 34. The follower plate 30 is mounted on the small arm sleeve 4, the bottom plate 31 is mounted on the large arm sleeve 1, and the follower plate 30 is attached to the small arm sleeve 4. A plurality of telescopic rods 32 are provided, and the plurality of telescopic rods 32 are respectively mounted on the bottom plate 31. A plurality of telescopic discs 33 are provided, and the plurality of telescopic discs 33 are respectively slidably connected to the telescopic rods 32. A plurality of stretching springs 34 are respectively mounted on each telescopic disc 33, and the plurality of stretching springs 34 respectively abut against the next telescopic disc 33. A positioning rod 35 is provided on the lower end surface of the follower plate 30. A friction disc 36 is provided between every two telescopic discs 33. A positioning groove 37 is respectively opened on each friction disc 36. The positioning rod 35 is slidably connected in the plurality of positioning grooves 37. A plurality of telescopic rods 32 are provided with a fixed disc 38. A mounting sleeve 39 is fixed on the fixed disc 38. The mounting sleeve 39 slides in the mounting sleeve A push tube 40 is provided, a push spring 41 is provided on the push tube 40, a push ring 42 is provided on the push spring 41, the push ring 42 abuts against the friction disk 36 at the lower end, a plurality of transverse holes 43 are equidistantly provided on the side wall of the mounting sleeve 39, a clamping rod 44 is slidably provided in the transverse hole 43, a plurality of annular grooves 45 are equidistantly provided on the push tube 40, the clamping rod 44 is clamped in the annular groove 45, a follower ball 46 is provided on each clamping rod 44, a tension spring 47 is provided on the follower ball 46, and the tension spring 47 is connected to the side wall of the mounting sleeve 39, and the upper and lower ends of the mounting sleeve 39 are respectively slidably provided with a two-way sleeve 48, each two-way sleeve 48 is respectively provided with an expansion sleeve 49, and a plurality of springs 50 are provided between the two expansion sleeves 49. A plurality of lateral grooves 51 are provided on the side wall of the two-way sleeve 48, and the clamping rod 44 is slidably connected in the lateral groove 51. An embedded groove 52 is provided on the upper arm sleeve 1, and an external plate 53 is slidably provided in the embedded groove 52, and the external plate 53 is installed on the external equipment.

[0044] Working principle: when the take-up spring 6 is in use, the push spring 41 does not exert force, and under the action of the stretching spring 34, there is no friction between the multiple telescopic disks 33 and the friction disk 36, so there is no friction between the multiple telescopic disks 33 and the friction disk 36, so only the upper end can play a role in exerting resistance. When reverse resistance is needed, the take-up spring 6 at the upper end is disconnected, and then the elastic force of the push spring 41 can be changed to press on the friction disk 36. Since the action is mutual, the vertical force of the multiple friction disks 36 and the telescopic disk 33 is the same, but the area of ​​the friction force will increase due to the staggered arrangement. Multiple times, thereby increasing the friction force. When the arm drives the rotation of the forearm sleeve 4, since the telescopic disk 33 is slidably connected to the telescopic rod 32, the telescopic disk 33 will not rotate, and the positioning groove 37 on the friction disk 36 is stuck on the positioning rod 35, so the multiple friction disks 36 will rotate accordingly, and then the friction force between the friction disk 36 and the telescopic disk 33 provides resistance to contraction and expansion. Since the nature of the friction force is opposite to the direction of movement, the reverse resistance to the arm is guaranteed, and there is no rebound force when in use. Therefore, when exhaustion occurs, no rebound force will occur, thereby ensuring safety in use.

[0045] When the elastic force of the push spring 41 needs to be changed, it is only necessary to change the deformation of the push spring 41. First, it is pinched on the two bidirectional sleeves 48, and then the follower ball 46 is made to abut against the side wall of the expansion sleeve 49, and then the multiple follower balls 46 are driven to slide outward, so that the clamping rod 44 is released from the clamping connection with the annular groove 45. At this time, the push tube 40 is pushed and the push spring 41 is compressed, thereby changing the friction force between the telescopic disk 33 and the friction disk 36. The friction force situation can be determined according to the position of the annular groove 45, thereby completing the adjustment of the resistance.

[0046] See also Figure 10 to Figure 12 In order to realize grip strength training, a gripping mechanism is added, which includes an extension plate 54, a handle 55, a conical spring 56 and a grip sleeve 57. The extension plate 54 is installed on the forearm sleeve 4, the handle 55 is installed on the extension plate 54, the grip sleeve 57 is rotatably connected to the handle 55, and the two ends of the conical spring 56 are respectively connected to the handle 55 and the grip sleeve 57.

[0047] Working principle: When the forearm sleeve 4 needs to be rotated, the trainee holds the handle 55 and can perform upper limb rehabilitation training. When grip strength training is needed, it is only necessary to pinch the handle 55 and the grip sleeve 57 and then pinch them. Since the conical spring 56 is connected to the handle 55 and the grip sleeve 57, grip rehabilitation training can be performed. Not only can the arm be trained, but also the grip strength can be trained through this device, thereby improving the convenience of use.

[0048] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which will not be described one by one here. In the above, all fixed connections are preferably welded. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An upper limb rehabilitation training device, comprising an upper arm sleeve (1), characterized in that: The upper arm sleeve (1) is provided with a switching mechanism, and the switching mechanism comprises a top plate (2), a follower plate (3), a small arm sleeve (4), a bottom sleeve (5), a tightening spring (6), a fitting ring (7), an inner rod (8), an inner ring (9), a friction rod (10), an elastic strip (11), a variable resistance mechanism and a holding mechanism. The top plate (2) is mounted on the side of the upper arm sleeve (1), the follower plate (3) is fitted on the lower end surface of the top plate (2), the small arm sleeve (4) is mounted on the follower plate (3), the bottom sleeve (5) is fixedly mounted on the upper end surface of the top plate (2), and a tightening spring (6) is mounted on the bottom sleeve (5). A plurality of fitting rings (7) are provided, and the plurality of fitting rings (7) are respectively arranged at equal distances. Mounted on the tightening spring (6), a plurality of internal rods (8) are equidistantly mounted on the top plate (2), an internal ring (9) is mounted on the upper end surfaces of the plurality of internal rods (8), a plurality of fitting rings (7) are respectively nested on the plurality of internal rods (8), each fitting ring (7) is respectively provided with a plurality of fixing grooves (12), each fixing groove (12) is respectively provided with a vertical groove (13), a friction rod (10) is respectively slidably connected in the plurality of fixing grooves (12), an elastic strip (11) is mounted between two friction rods (10), and the elastic strip (11) is slidably connected to the inner wall of the vertical groove (13), the variable resistance mechanism is mounted on the upper arm sleeve (1), and the holding mechanism is mounted on the lower arm sleeve (4).

2. The upper limb rehabilitation training device according to claim 1, characterized in that: A rotating rod (14) is provided on the follower plate (3), the rotating rod (14) is rotatably connected to the top plate (2), a top block (15) is coaxially provided on the rotating rod (14), a top disk (16) is provided on the upper end of the tightening spring (6), the top disk (16) and the rotating rod (14) are coaxially arranged, a receiving rod (17) is coaxially provided on the rotating rod (14), an adjusting sleeve (18) is slidably provided on the receiving rod (17), a plurality of insertion rods (19) are equidistantly provided on the side wall of the adjusting sleeve (18), a plurality of internal grooves (20) are equidistantly provided on the side wall of the top block (15), a plurality of external grooves (21) are provided on the inner wall of the top disk (16), the insertion rod (19) is slidably connected in the external grooves (21) and the internal grooves (20), and the number of the external grooves (21) is greater than the number of the internal grooves (20).

3. The upper limb rehabilitation training device according to claim 2, characterized in that: The adjusting sleeve (18) is provided with an engagement disk (22), the engagement disk (22) and the receiving rod (17) are coaxially arranged, a stop disk (23) is coaxially arranged on the receiving rod (17), a plurality of push rods (24) are equidistantly arranged on the engagement disk (22), each of the push rods (24) is coaxially arranged with a plurality of limiting rings (25), a receiving disk (26) is provided on the stop disk (23), and a plurality of stop grooves (27) are equidistantly arranged on the receiving disk (26).

4. The upper limb rehabilitation training device according to claim 3, characterized in that: A plurality of return springs (28) are equidistantly arranged on the upper end surface of the engagement disk (22), and a resistance ring (29) is respectively arranged on the plurality of return springs (28), and the resistance ring (29) presses against the lower end surface of the stop disk (23).

5. The upper limb rehabilitation training device according to claim 1, characterized in that: The variable resistance mechanism comprises a second follower plate (30), a bottom plate (31), a telescopic rod (32), a telescopic disc (33) and an opening spring (34); the second follower plate (30) is mounted on the small arm sleeve (4); the bottom plate (31) is mounted on the large arm sleeve (1); and the second follower plate (30) is attached to the small arm sleeve (4); a plurality of telescopic rods (32) are provided, and the plurality of telescopic rods (32) are respectively mounted on the bottom plate (31); a plurality of telescopic discs (33) are provided, and the plurality of telescopic discs (33) are respectively slidably connected to the telescopic rod (32); a plurality of opening springs (34) are respectively mounted on each of the telescopic discs (33); and the plurality of opening springs (34) respectively abut against the next telescopic disc (33).

6. The upper limb rehabilitation training device according to claim 5, characterized in that: A positioning rod (35) is provided on the lower end surface of the second follower plate (30), a friction plate (36) is provided between each two telescopic plates (33), and each friction plate (36) is provided with a positioning groove (37), and the positioning rod (35) is slidably connected in a plurality of the positioning grooves (37).

7. An upper limb rehabilitation training device according to claim 6, characterized in that: A plurality of telescopic rods (32) are provided with a fixed disk (38), a mounting sleeve (39) is fixedly provided on the fixed disk (38), a push tube (40) is slidably provided in the mounting sleeve (39), a push spring (41) is provided on the push tube (40), a push spring (41) is provided with a push ring (42), the push ring (42) contacts the friction disk (36) at the bottom end, a plurality of transverse holes (43) are equidistantly provided on the side wall of the mounting sleeve (39), a clamping rod (44) is slidably provided in the transverse hole (43), a plurality of annular grooves (45) are equidistantly provided on the push tube (40), and the clamping rod (44) is clamped in the annular groove (45).

8. The upper limb rehabilitation training device according to claim 7, characterized in that: Each of the clamping rods (44) is provided with a follower ball (46), and the follower ball (46) is provided with a tension spring (47). The tension spring (47) is connected to the side wall of the mounting sleeve (39). The upper and lower ends of the mounting sleeve (39) are slidably provided with bidirectional sleeves (48). Each of the bidirectional sleeves (48) is provided with an expansion sleeve (49). A plurality of springs (50) are provided between the two expansion sleeves (49). A plurality of lateral grooves (51) are provided on the side wall of the bidirectional sleeve (48), and the clamping rod (44) is slidably connected in the lateral grooves (51).

9. The upper limb rehabilitation training device according to claim 1, characterized in that: The upper arm sleeve (1) is provided with an inner groove (52), an outer plate (53) is slidably provided in the inner groove (52), and the outer plate (53) is mounted on an external device.

10. The upper limb rehabilitation training device according to claim 1, characterized in that: The holding mechanism comprises an extension plate (54), a handle (55), a conical spring (56) and a grip sleeve (57); the extension plate (54) is mounted on the forearm sleeve (4); the handle (55) is mounted on the extension plate (54); the grip sleeve (57) is rotatably connected to the handle (55); and two ends of the conical spring (56) are respectively connected to the handle (55) and the grip sleeve (57).

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