A new passive stretching finger joint rehabilitation device

Abstract

The present invention proposes a novel passive stretch finger joint rehabilitation device, comprising a back of hand plate assembly, a proximal phalanx assembly, a distal phalanx assembly, a proximal phalanx adjustment assembly, a distal phalanx adjustment assembly and a binding strap; the back of hand plate assembly comprises a back of hand plate, a back plate slider and a locking rod; the proximal phalanx assembly is adapted and fixed to the proximal phalanx of the finger and comprises a proximal phalanx fixing block, a proximal phalanx fixing slider and a locking rod; the distal phalanx assembly is adapted and fixed to the distal phalanx of the finger and comprises a distal phalanx fixing block, a distal phalanx fixing slider and a locking rod; the proximal phalanx adjustment assembly comprises a movable top block, a movable nut block and a first screw rod; the distal phalanx adjustment assembly comprises an outer connecting rod, an inner connecting rod and a second screw rod. The present invention provides a novel passive stretch finger joint rehabilitation device with a simple structure, which can accommodate four fingers, namely the index finger, the middle finger, the ring finger and the little finger, to perform flexion and extension rehabilitation training at the same time, can meet the needs of different patients, and is suitable for a wide range of people.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a novel passive stretching finger joint rehabilitation device. Background Art

[0002] The function of the finger joint rehabilitation device is to provide a full range of joint mobility treatment for the fingers, so that the disabled can restore a certain degree of self-care and work ability.

[0003] At present, finger rehabilitation devices are basically exoskeleton structures, and the structure is relatively complex, which can only be used for some patients whose muscle strength is not very weak. Patients cannot perform rehabilitation training step by step during use, there is no adjustment function, and the stretching force cannot be controlled. Especially for patients who need slight stretching of finger tendons, they cannot use the finger joint rehabilitation trainers currently available on the market.

[0004] The finger joints are usually unable to flex and extend autonomously due to stroke, cerebral hemiplegia, hemiplegia, finger burns, etc. If the patient is in this state for a long time, it will cause tendon atrophy, which will have a certain impact on the patient's recovery. In addition, the passive finger joint rehabilitation device currently on the market can only perform rehabilitation training on one finger on one hand, while most patients need 2-5 fingers to do rehabilitation training at the same time, which will invisibly slow down the treatment progress and affect the treatment effect.

[0005] Existing finger joint rehabilitation devices are usually obtained through mass production through molds, and their specifications and models are basically completely unified. However, patients vary from person to person, and the injury locations and onset characteristics of different patients are also different. Summary of the invention

[0006] Based on the above problems, the purpose of the present invention is to provide a new passive stretch finger joint rehabilitation device with a simple structure, small size, which can accommodate the index finger, middle finger, ring finger and little finger for flexion and extension rehabilitation training at the same time, can meet the needs of different patients, and is suitable for a wide range of people.

[0007] In view of the above problems, the following technical solutions are provided: a novel passive extension finger joint rehabilitation device, characterized in that it comprises a back of hand plate assembly, a proximal phalanx assembly, a distal phalanx assembly, a proximal phalanx adjustment assembly, a distal phalanx adjustment assembly and a binding strap, the back of hand plate assembly is fixedly adapted to the index finger, middle finger, ring finger and little finger on the back of the hand and comprises a back of hand plate, a back plate slider and a locking rod, the proximal phalanx assembly is fixedly adapted to the proximal phalanx of the finger and comprises a proximal phalanx fixing block, a proximal phalanx fixing slider and a locking rod, the distal phalanx assembly is fixedly adapted to the distal phalanx of the finger and comprises a distal phalanx fixing block, a distal phalanx fixing slider and a locking rod, the proximal phalanx adjustment assembly comprises a movable top block, a movable nut block and a first screw rod, and the distal phalanx adjustment assembly comprises an outer connecting rod, an inner connecting rod and a second screw rod;

[0008] The back of hand board is fixed on the back of the hand by a strap, and four slideways corresponding to the index finger, middle finger, ring finger and little finger are provided on the back of hand board; the back of hand board slider is placed on the back of hand board by engaging with the outer side of the slideway, and the back of hand board slider is fixedly connected with the proximal phalanx fixing block by a pin shaft;

[0009] The movable top block is fixed to the back plate slider in the form of a pin shaft, one end of the first screw rod is fixedly connected to the movable top block, and the other end can be rotatably extended through the movable nut block, and the movable nut block is fixed to one end of the proximal phalanx fixing block in the form of a pin shaft, and the rotation of the first screw rod can drive the movable nut block and the proximal phalanx fixing block to approach or move away from the movable top block;

[0010] The other end of the proximal phalanx fixing block is fixedly connected to one end of the outer connecting rod and the inner connecting rod in the form of a pin shaft, and the proximal phalanx fixing slider is fixedly connected to the lower end surface of the proximal phalanx fixing block through track sliding to fix the proximal phalanx part of the finger; the distal phalanx fixing slider is fixedly connected to the lower end surface of the distal phalanx fixing block through track sliding to fix the distal phalanx part of the finger; the proximal phalanx fixing slider and the distal phalanx fixing slider are respectively adapted to fit the proximal phalanx and the distal phalanx of the finger;

[0011] One end of the outer connecting rod and the inner connecting rod is connected to the proximal phalanx fixing block, and the other end is connected to the distal phalanx fixing block. The outer connecting rod and the inner connecting rod are coaxially connected via a second screw rod. By adjusting the second screw rod, the distal phalanx fixing block can make a circular motion around the proximal phalanx fixing block.

[0012] The locking rod is fixed to the back plate slider, the proximal phalanx fixing block and the distal phalanx fixing block respectively through threaded holes. When the locking rod is rotated and locked, the back plate slider, the proximal phalanx fixing block and the distal phalanx fixing block can be fixed on their corresponding tracks.

[0013] The present invention is further configured as follows: the upper ends of the first screw rod and the second screw rod are both provided with handles for facilitating their rotation.

[0014] The present invention is further configured as follows: a fixing nut rotatably connected to the first screw rod is embedded in the movable nut block.

[0015] Beneficial effects of the present invention:

[0016] 1. The method of using the new passive extension finger joint rehabilitation device is as follows: the back of the hand plate is fixed to the back of the patient's hand by a strap, and the first screw rod and the second screw rod are adjusted so that the proximal phalanx fixing slider and the distal phalanx fixing slider can respectively fit with the proximal phalanx and distal phalanx of the patient's finger, and fixed with a strap; at this time, the first screw rod is adjusted to allow the movable nut block to drive the proximal phalanx fixing block to approach or move away from the movable top block, and the second screw rod is adjusted through the outer connecting rod and the inner connecting rod to allow the distal phalanx fixing block to make a circular motion around the proximal phalanx fixing block. Through the above movement, it can be ensured that the proximal phalanx of the patient's finger has a 90° flexion and a 14° extension relative to the metacarpal bone, and the distal phalanx and the middle phalanx have a 90° flexion and a 14° extension relative to the proximal phalanx.

[0017] 2. The design structure is simple, which ensures that its volume is very small. It can accommodate the index finger, middle finger, ring finger and little finger for flexion and extension rehabilitation training at the same time. Each finger is fixed by a strap to the patient's finger, which can meet the needs of different patients and is suitable for a wide range of people.

[0018] 3. Most of the components of the new passive stretch finger joint rehabilitation device can be made of metal or non-metal materials, and can be manufactured by 3D printing, mold injection molding, and machining processes. Due to its light weight and small size, it can be convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of a novel passive stretching finger joint rehabilitation device in an embodiment of the present invention;

[0020] The figure shows: 1-hand back plate assembly; 11-hand back plate; 111-slideway; 12-hand back plate slider; 13-locking rod; 2-proximal phalanx assembly; 21-proximal phalanx fixing block; 22-proximal phalanx fixing slider; 23-locking rod; 3-distal phalanx assembly; 31-distal phalanx fixing block; 32-distal phalanx fixing slider; 33-locking rod; 4-proximal phalanx adjustment assembly; 41-movable top block; 42-movable nut block; 43-first screw rod; 431-handle; 5-distal phalanx adjustment assembly; 51-external connecting rod; 52-internal connecting rod; 53-second screw rod; 531-handle; DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] like Figure 1 As shown, a novel passive stretch finger joint rehabilitation device comprises a back of hand plate component 1, a proximal phalanx component 2, a distal phalanx component 3, a proximal phalanx adjustment component 4, a distal phalanx adjustment component 5 and a binding strap, wherein the back of hand plate component 1 is fixedly adapted to the index finger, middle finger, ring finger and little finger on the back of the hand and comprises a back of hand plate 11, a back plate slider 12 and a locking rod 13, the proximal phalanx component 2 is fixedly adapted to the proximal phalanx of the finger and comprises a proximal phalanx fixing block 21, a proximal phalanx fixing slider 22 and a locking rod 23, the distal phalanx component 3 is fixedly adapted to the distal phalanx of the finger and comprises a distal phalanx fixing block 31, a distal phalanx fixing slider 32 and a locking rod 33, the proximal phalanx adjustment component 4 comprises a movable top block 41, a movable nut block 42 and a first screw rod 43, and the distal phalanx adjustment component 5 comprises an outer connecting rod 51, an inner connecting rod 52 and a second screw rod 53;

[0023] The back of hand plate 11 is fixed on the back of the hand by a strap, and the back of hand plate 11 is provided with four slideways 111 corresponding to the index finger, middle finger, ring finger and little finger, and the four slideways 111 are independent of each other;

[0024] The backboard slider 12 is placed on the hand backboard 11 by engaging with the outer side of the slideway 111, and the backboard slider 12 is fixedly connected to the proximal phalanx fixing block 21 by a pin;

[0025] The movable top block 41 is fixed to the back plate slider 12 in the form of a pin shaft, one end of the first screw rod 43 is fixedly connected to the movable top block 41, and the other end can be rotated to extend through the movable nut block 42, and the movable nut block 42 is fixed to one end of the proximal phalanx fixing block 21 in the form of a pin shaft. The rotation of the first screw rod 43 can drive the movable nut block 42 and the proximal phalanx fixing block 21 to approach or move away from the movable top block 42;

[0026] The movable nut block 42 is embedded with a fixing nut rotatably connected to the first screw rod 43, and the first screw rod 43 can rotate inside the fixing nut. The fixing nut is fixed relative to the first screw rod 43, and is movable relative to the movable top block 43, so that when the first screw rod 43 rotates, the fixing nut can always maintain this state with the movable top block 43.

[0027] The other end of the proximal phalanx fixing block 21 is fixedly connected to one end of the outer connecting rod 51 and the inner connecting rod 52 in the form of a pin shaft, and the proximal phalanx fixing slider 22 is fixedly connected to the lower end surface of the proximal phalanx fixing block 21 through track sliding to fix the proximal phalanx part of the finger; the distal phalanx fixing slider 32 is fixedly connected to the lower end surface of the distal phalanx fixing block 31 through track sliding to fix the distal phalanx part of the finger; the proximal phalanx fixing slider 22 and the distal phalanx fixing slider 32 are respectively adapted to fit the proximal phalanx and the distal phalanx of the finger;

[0028] One end of the outer connecting rod 51 and the inner connecting rod 52 are connected to the proximal phalanx fixing block 21, and the other end is connected to the distal phalanx fixing block 31. The outer connecting rod 51 and the inner connecting rod 52 are coaxially connected via a second screw rod 53. By adjusting the second screw rod 53, the distal phalanx fixing block 31 can make a circular motion around the proximal phalanx fixing block 21.

[0029] The locking rod 13, locking rod 23 and locking rod 33 are respectively fixed to the back plate slider 12, the proximal phalanx fixing block 21 and the distal phalanx fixing block 31 through threaded holes. When the locking rod 13, locking rod 23 and locking rod 33 are rotated and locked, the back plate slider 12, the proximal phalanx fixing block 21 and the distal phalanx fixing block 31 can be fixed on their corresponding tracks.

[0030] Furthermore, the upper ends of the first screw rod 43 and the second screw rod 53 are both provided with a handle 431 and a handle 531 for the patient to rotate them conveniently.

[0031] The method of using the new passive extension finger joint rehabilitation device is as follows: the back of the hand plate 11 is fixed to the back of the patient's hand by a strap, and the first screw rod 43 and the second screw rod 53 are adjusted so that the proximal phalanx fixing slider 22 and the distal phalanx fixing slider 32 can respectively fit the proximal phalanx and distal phalanx of the patient's finger, and fixed with a strap; at this time, the first screw rod 43 is adjusted to allow the movable nut block 42 to drive the proximal phalanx fixing block 21 to approach or move away from the movable top block 42, and the second screw rod 53 is adjusted through the external connecting rod 51 and the internal connecting rod 52 to allow the distal phalanx fixing block 31 to make a circular motion around the proximal phalanx fixing block 21. Through the above movement, it can be ensured that the proximal phalanx of the patient's finger has a 90° flexion and a 14° extension relative to the metacarpal bone, and the distal phalanx and the middle phalanx have a 90° flexion and a 14° extension relative to the proximal phalanx.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the scope of protection of the present invention.

Claims

1. A new passive stretch finger joint rehabilitation device, characterized by: It includes a back of hand plate assembly, a proximal phalanx assembly, a distal phalanx assembly, a proximal phalanx adjustment assembly, a distal phalanx adjustment assembly and a binding strap. The back of hand plate assembly is fixedly adapted to the index finger, middle finger, ring finger and little finger on the back of the hand and includes a back of hand plate, a back plate slider and a locking rod. The proximal phalanx assembly is adapted to be fixed to the proximal phalanx of the finger and includes a proximal phalanx fixing block, a proximal phalanx fixing slider and a locking rod. The distal phalanx assembly is adapted to be fixed to the distal phalanx of the finger and includes a distal phalanx fixing block, a distal phalanx fixing slider and a locking rod. The proximal phalanx adjustment assembly includes a movable top block, a movable nut block and a first screw rod. The distal phalanx adjustment assembly includes an outer connecting rod, an inner connecting rod and a second screw rod. The back of hand board is fixed on the back of the hand by a strap, and four slideways corresponding to the index finger, middle finger, ring finger and little finger are provided on the back of hand board; the back of hand board slider is placed on the back of hand board by engaging with the outer side of the slideway, and the back of hand board slider is fixedly connected with the proximal phalanx fixing block by a pin shaft; The movable top block is fixed to the back plate slider in the form of a pin shaft, one end of the first screw rod is fixedly connected to the movable top block, and the other end can be rotatably extended through the movable nut block, and the movable nut block is fixed to one end of the proximal phalanx fixing block in the form of a pin shaft, and the rotation of the first screw rod can drive the movable nut block and the proximal phalanx fixing block to approach or move away from the movable top block; The other end of the proximal phalanx fixing block is fixedly connected to one end of the outer connecting rod and the inner connecting rod in the form of a pin shaft, and the proximal phalanx fixing slider is fixedly connected to the lower end surface of the proximal phalanx fixing block through track sliding to fix the proximal phalanx part of the finger; the distal phalanx fixing slider is fixedly connected to the lower end surface of the distal phalanx fixing block through track sliding to fix the distal phalanx part of the finger; the proximal phalanx fixing slider and the distal phalanx fixing slider are respectively adapted to fit the proximal phalanx and the distal phalanx of the finger; One end of the outer connecting rod and the inner connecting rod is connected to the proximal phalanx fixing block, and the other end is connected to the distal phalanx fixing block. The outer connecting rod and the inner connecting rod are coaxially connected via a second screw rod. By adjusting the second screw rod, the distal phalanx fixing block can make a circular motion around the proximal phalanx fixing block. The locking rod is fixed to the back plate slider, the proximal phalanx fixing block and the distal phalanx fixing block respectively through threaded holes. When the locking rod is rotated and locked, the back plate slider, the proximal phalanx fixing block and the distal phalanx fixing block can be fixed on their corresponding tracks.

2. The novel passive stretch finger joint rehabilitation device according to claim 1 is characterized by: The upper ends of the first screw rod and the second screw rod are both provided with handles for facilitating their rotation.

3. A novel passive stretch finger joint rehabilitation device according to claim 1 or 2, characterized in that: The movable nut block is embedded with a fixing nut rotatably connected to the first screw rod.

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