Wrist developer

Abstract

The utility model relates to a rehabilitation training tool, in particular to a wrist developer. The device comprises a first grab handle and a second grab handle, the first grab handle is provided with a straight handle part and a crank part, the top end of the crank part is integrally connected to the lower end face of the straight handle part, the second grab handle is pivoted to the tail end of the straight handle part and partially protrudes out of the upper end of the straight handle part, and a spring is arranged at the top end of the second grab handle and connected to a spring resistance adjusting device arranged on the straight handle part. The second grab handle and the crank part can be kept in an opening state through the spring, and the second grab handle can be close to the direction of the crank part by taking a pivoting point as an axis under certain gripping force; the hand-muscle developer is characterized in that the adjusting device enabling the distance between the second grab handle and the crank part to be adjustable in the opening state is arranged, the improved hand-muscle developer can adjust the holding distance and the resistance at the same time, is more friendly to patients with small hands and weak force, and can better help the patients to exercise.

Description

Technical Field

[0001] The utility model relates to a rehabilitation training appliance, in particular to a handgrip strengthener. Background Art

[0002] Clinically, hemodialysis patients usually use fistulas to draw blood out of their bodies and detoxify and drain water on dialysis machines. In order to ensure blood circulation and avoid stenosis or blockage of the fistula, patients need to use hand grippers for exercise.

[0003] At present, the most commonly used handgrip in clinical practice is a spring handgrip. Its structure can refer to the spring handgrip with countable and adjustable resistance disclosed in CN205814970U. This spring handgrip is widely used because of its simple structure, economical and affordable, adjustable resistance, and can meet the exercise needs of patients at different stages. However, this type of handgrip with adjustable resistance only considers the adjustment of resistance when meeting the exercise needs of patients. Sometimes the closing stroke of the handgrip is relatively large compared to the patient's hand. In this case, even if the resistance is adjusted to the minimum, it is difficult for the patient to close the handgrip. Furthermore, for patients with small hands, it is difficult to even hold the handgrip, so it needs to be improved. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a hand gripper capable of adjusting the stroke, and the specific technical solution is as follows:

[0005] A handgrip strengthener includes a first handle and a second handle. The first handle has a straight handle portion and a crank portion. The top end of the crank portion is integrally connected to the lower end surface of the straight handle portion. The second handle is pivoted to the tail end of the straight handle portion. The second handle portion protrudes from the upper end of the straight handle portion. A spring is provided at the top end of the second handle portion and is connected to a spring resistance adjustment device provided on the straight handle portion. The second handle can maintain an open state with the crank portion through the spring. Under a certain grip force, the second handle can be pivoted to the axis and move closer to the crank portion. The improvement of the utility model is that an adjustment device is provided to adjust the distance between the second handle and the crank portion in the open state. The distance between the second handle and the crank portion can be called the grip distance, or the stroke of the handgrip strengthener. The size of the stroke is related to the difficulty of closing under the same resistance. Under the same resistance but different strokes, a smaller stroke will be easier to close than a larger stroke. The greater the closing resistance of the handgrip strengthener, the more obvious the difference caused by the stroke. Therefore, when the stroke is adjustable, the stroke and resistance can be adjusted simultaneously according to the patient's condition.

[0006] As an optional solution, the adjustment device of the utility model includes a threading rope, which passes through the second handle and the crank part. The second handle and the crank part are provided with through holes that cooperate with the threading rope. Both ends of the threading rope have adjustable position limit structures. The size of the two limit structures is larger than the diameter of the through holes, so the distance between the second handle and the crank part when opened will not be greater than the spacing between the two limit structures. The position of the limit structure is adjustable on the threading rope, so the maximum distance between the second handle and the crank part when opened can be adjusted by adjusting the position of the limit structure, that is, the grip distance can be adjusted by adjusting the position of the limit structure.

[0007] On the basis of the above scheme, the limit structure can be selected as a knot formed by the threading rope itself, and the knot can be manually untied and re-tied. Changing the position of one of the knots can adjust the grip distance. The advantage of this structure is the minimum cost. The minimum cost here means that the cost of the limit structure itself is equal to zero, which also means that as a whole, it has the minimum cost for improvement on the basis of the original gripper, and only needs to drill two holes and add a threading rope;

[0008] Of course, considering the inconvenience of untying the knot, you can consider using a knot as the limiting structure at one end of the rope and an elastic buckle at the other end. By changing the position of the elastic buckle, you can adjust the grip distance.

[0009] Of course, considering that the principle of the elastic buckle is to use the internal spring to compress the buckle ring to lock the threaded rope, and use friction to prevent the threaded rope from moving relative to the elastic buckle, and the second handle will actually open under the reset of the top spring, so if the friction is less than the tension, the elastic buckle will actually move. For this reason, the elastic buckle can be a double-hole elastic buckle, and the threaded rope should be inserted from the direction of the second handle and then pass through the crank part, then turn back and insert the crank part from another hole and then pass out from the second handle, and then the double-hole elastic buckle is connected to the two rope ends. Compared with the single-hole elastic buckle, the double-hole elastic buckle will have greater friction and can better play a limiting role.

[0010] As another option, the adjustment device of the utility model can adopt a rotation angle limiting structure, which includes a first wall and a second wall protruding from the crank portion, an angle limiting piece arranged between the first wall and the second wall, and a third wall and a fourth wall protruding from the second handle and on both sides of the first wall and the second wall; the first wall, the second wall, the angle limiting piece, the third wall, and the fourth wall are connected by a pivot shaft, and when the second handle is kept open with the crank portion under the action of a spring at the top, a rotation angle position of its top abuts against the angle limiting piece, and the angle limiting piece is arranged to be fixed between the first wall and the second wall with an adjustable angle, and the maximum opening angle of the second handle and the crank portion can be adjusted by changing the angle of the angle limiting piece between the first wall and the second wall, that is, it is equivalent to adjusting the grip distance; compared with the above-mentioned adjustment by threading a rope, this solution will be complicated in manufacturing process, but will be more coordinated and beautiful in appearance.

[0011] On this basis, the angle limiting member is configured to include a disc body, and a limiting portion is provided on the outer periphery of the disc body to resist the corner position of the second handle. A plurality of latch teeth are provided on one surface of the disc body, and a notch is provided on the side of the disc body opposite to the latch teeth so that the disc body can bend and deform. A circle of latch grooves is provided on the first wall to cooperate with the latch teeth. Under normal circumstances, the latch grooves and the latch teeth are engaged to lock the position of the angle limiting member. After the disc body is bent and deformed, the latch teeth of the angle limiting member can be disengaged from the latch grooves to release the lock and rotate to adjust the angle, so that the position of the limiting portion changes to achieve the adjustment of the grip distance. The advantage of this scheme is that the adjustment is more convenient, and the grip distance can be conveniently adjusted by only bending the disc body and rotating it.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model provides a hand gripper which is an improvement on the existing spring hand gripper with adjustable resistance. The improved hand gripper can adjust the grip distance and resistance at the same time, which is more friendly to patients with small hands and weak strength and can better help them exercise. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front view of the handgrip disclosed in the first embodiment;

[0015] Figure 2 This is a schematic diagram of the structure of the handgrip strengthener disclosed in the first embodiment after the grip distance is shortened;

[0016] Figure 3 is a schematic diagram of the three-dimensional structure of the handgrip disclosed in the second embodiment;

[0017] Figure 4 is a schematic diagram of the three-dimensional structure of the handgrip disclosed in the third embodiment;

[0018] Figure 5 is a front view of the handgrip disclosed in the fourth embodiment;

[0019] Figure 6 It is a schematic diagram of the structure of the handgrip strengthener disclosed in the fourth embodiment after the grip distance is shortened;

[0020] Figure 7 , Figure 8 is a structural explosion diagram of the handgrip disclosed in the fourth embodiment at different viewing angles;

[0021] Description of the drawings: first handle 1, straight handle portion 101, crank portion 102, first wall 102a, slot 102a-1, second wall 102b, second handle 2, third wall 201, fourth wall 202, corner position 203, rope threading 3, knot 301, single-hole elastic buckle 4, double-hole elastic buckle 5, corner limiter 6, disc body 601, limiting portion 602, and locking tooth 603. DETAILED DESCRIPTION

[0022] The utility model is now further described with reference to the accompanying drawings.

[0023] Embodiment 1

[0024] Reference Figure 1 , Figure 2 The hand gripper shown includes a first handle 1 and a second handle 2. The first handle 1 has a straight handle portion 101 and a crank portion 102. The top end of the crank portion 102 is integrally connected to the lower end surface of the straight handle portion 101. The second handle 2 is pivotally connected to the tail end of the straight handle portion 101. The second handle 2 partially protrudes from the upper end of the straight handle portion 101. A spring is provided at the top end of the second handle 2 and is connected to a spring resistance adjustment device provided on the straight handle portion 101. The second handle 2 can maintain an open state with the crank portion 102 through the spring. Under a certain gripping force, the second handle 2 can move closer to the crank portion 102 with the pivot point as the axis.

[0025] The adjusting device comprises a threading rope 3, which passes through the second handle 2 and the crank part 102. The second handle 2 and the crank part 102 are provided with through holes matching with the threading rope 3. The two ends of the threading rope 3 have limit structures with adjustable positions, and the size of the two limit structures is larger than the diameter of the through holes.

[0026] The limiting structure is a knot 301 formed by the threading rope 3 itself being knotted.

[0027] Embodiment 2

[0028] Reference Figure 3 The present invention shows a grip strengthener, comprising a first grip 1 and a second grip 2. The first grip 1 has a straight handle portion 101 and a crank portion 102. The top end of the crank portion 102 is integrally connected to the lower end surface of the straight handle portion 101. The second grip 2 is pivotally connected to the tail end of the straight handle portion 101. The second grip 2 partially protrudes from the upper end of the straight handle portion 101. A spring is provided at the top end of the second grip 2 and is connected to a spring resistance adjustment device provided on the straight handle portion 101. The second grip 2 can maintain an open state with the crank portion 102 through the spring. Under a certain gripping force, the second grip 2 can move closer to the crank portion 102 with the pivot point as the axis.

[0029] The adjusting device comprises a threading rope 3, which passes through the second handle 2 and the crank part 102. The second handle 2 and the crank part 102 are provided with through holes matching with the threading rope 3. The two ends of the threading rope 3 have limit structures with adjustable positions, and the size of the two limit structures is larger than the diameter of the through holes.

[0030] In the limiting structures at both ends, one end is a knot 301 formed by the threading rope 3 itself, and the other end is a single-hole elastic buckle 4.

[0031] Embodiment 3

[0032] Reference Figure 4 The present invention shows a grip strengthener, comprising a first grip 1 and a second grip 2. The first grip 1 has a straight handle portion 101 and a crank portion 102. The top end of the crank portion 102 is integrally connected to the lower end surface of the straight handle portion 101. The second grip 2 is pivotally connected to the tail end of the straight handle portion 101. The second grip 2 partially protrudes from the upper end of the straight handle portion 101. A spring is provided at the top end of the second grip 2 and is connected to a spring resistance adjustment device provided on the straight handle portion 101. The second grip 2 can maintain an open state with the crank portion 102 through the spring. Under a certain gripping force, the second grip 2 can move closer to the crank portion 102 with the pivot point as the axis.

[0033] The adjusting device comprises a threading rope 3, which should be inserted from the direction of the second handle 2 and then pass through the crank part 102, then turn back and pass through the crank part 102 from another through hole and then pass out from the second handle 2, and then a double-hole elastic buckle 5 is provided to connect the two rope ends.

[0034] Embodiment 4

[0035] Reference Figure 5-Figure 8 The hand gripper shown includes a first handle 1 and a second handle 2. The first handle 1 has a straight handle portion 101 and a crank portion 102. The top end of the crank portion 102 is integrally connected to the lower end surface of the straight handle portion 101. The second handle 2 is pivotally connected to the tail end of the straight handle portion 101. The second handle 2 partially protrudes from the upper end of the straight handle portion 101. A spring is provided at the top end of the second handle 2 and is connected to a spring resistance adjustment device provided on the straight handle portion 101. The second handle 2 can maintain an open state with the crank portion 102 through the spring. Under a certain gripping force, the second handle 2 can move closer to the crank portion 102 with the pivot point as the axis.

[0036] The adjusting device can adopt a rotation angle limiting structure, which includes a first wall 102a and a second wall 102b protruding from the crank portion 102, an angle limiting member 6 arranged between the first wall 102a and the second wall 102b, and a third wall 201 and a fourth wall 202 protruding from the second handle 2 and on both sides of the first wall 102a and the second wall 102b; the first wall 102a, the second wall 102b, the angle limiting member 6, the third wall 201, and the fourth wall 202 are connected by a pivot axis, and when the second handle 2 is kept open with the crank portion 102 under the action of a spring at the top, a rotation angle position 203 of its top abuts against the angle limiting member 6, and the angle limiting member 6 is arranged to be fixed between the first wall 102a and the second wall 102b with an adjustable angle, and the maximum opening angle of the second handle 2 and the crank portion 102 can be adjusted by changing the angle of the angle limiting member 6 between the first wall 102a and the second wall 102b.

[0037] The corner limiting member 6 is configured to include a disc body 601, and a limiting portion 602 is provided on the outer periphery of the disc body 601 to resist the corner position 203 of the second handle 2. A plurality of latch teeth 603 are provided on one surface of the disc body 601, and a notch is provided on the side of the disc body 601 opposite to the latch teeth 603 so that the disc body 601 can be bent and deformed. A circle of latch grooves 102a-1 is provided on the first wall 102a to cooperate with the latch teeth 603. Under normal circumstances, the latch grooves 102a-1 and the latch teeth 603 are engaged to lock the position of the corner limiting member 6. After bending and deformation, the latch teeth 603 of the corner limiting member 6 can be disengaged from the latch grooves 102a-1 to release the lock and rotate to adjust the angle, so that the position of the limiting portion 602 changes to achieve the adjustment of the grip distance (refer to Figure 5 , Figure 6 ) to adjust the grip distance.

[0038] It should be noted that, in the above four embodiments, since the spring resistance adjustment device is a prior art, it is not described in detail. Its structure can refer to the spring gripper with countable and adjustable resistance disclosed in CN205814970U mentioned in the background technology. The single-hole elastic buckle and double-hole elastic buckle disclosed in the second and third embodiments are also prior art, which are often used to adjust the tightness of the rope on clothes, so they are not described in detail.

[0039] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. A grip strengthener, comprising a first grip (1) and a second grip (2), wherein the first grip (1) has a straight handle portion (101) and a crank portion (102), the top end of the crank portion (102) being integrally connected to the lower end surface of the straight handle portion (101), the second grip (2) being pivotally connected to the rear end of the straight handle portion (101), the second grip (2) partially protruding from the upper end of the straight handle portion (101), a spring being provided at the top end thereof and connected to a spring resistance adjustment device provided on the straight handle portion (101), the second grip (2) being able to maintain an open state with the crank portion (102) by means of the spring, and under a certain grip force, the second grip (2) being able to move closer to the crank portion (102) with the pivot point as the axis, wherein: An adjusting device is provided to enable the distance between the second handle (2) and the crank portion (102) to be adjustable in the open state.

2. A hand gripper according to claim 1, characterized in that: The adjustment device comprises a threading rope (3), wherein the threading rope (3) passes through the second handle (2) and the crank portion (102), and the second handle (2) and the crank portion (102) are provided with through holes that cooperate with the threading rope (3), and the two ends of the threading rope (3) are provided with position-adjustable limiting structures, the sizes of the two limiting structures are larger than the diameters of the through holes, and the positions of the limiting structures are adjustable on the threading rope (3).

3. A hand gripper according to claim 2, characterized in that: The limiting structure is a knot (301) formed by tying the threading rope (3) itself.

4. A hand gripper according to claim 2, characterized in that: One limiting structure is a knot (301) formed by tying the threading rope (3) itself, and the other limiting structure is a single-hole elastic buckle (4).

5. A hand gripper according to claim 1, characterized in that: The adjusting device comprises a threading rope (3), which is inserted from the direction of the second handle (2) and then passes through the crank portion (102), then turns back and passes through another through hole into the crank portion (102) and then passes out from the second handle (2). Double-hole elastic buckles (5) are provided on the two rope ends of the threading rope (3).

6. A hand gripper according to claim 1, characterized in that: The adjusting device is a rotation angle limiting structure, which comprises a first wall (102a) and a second wall (102b) protruding from the crank portion (102), an angle limiting member (6) arranged between the first wall (102a) and the second wall (102b), a third wall (201) and a fourth wall (202) protruding from the second handle (2) and on both sides of the first wall (102a) and the second wall (102b); the first wall (102a), the second wall (102b), the angle limiting member (6), the third wall (201) and the fourth wall (202) 1) The fourth wall (202) is connected via a pivot shaft. When the second handle (2) is kept open with the crank portion (102) under the action of a spring at the top, a top corner position (203) thereof abuts against an angle limiter (6). The angle limiter (6) is configured to be fixed between the first wall (102a) and the second wall (102b) in an angle-adjustable manner. The maximum opening angle of the second handle (2) and the crank portion (102) can be adjusted by changing the angle of the angle limiter (6) between the first wall (102a) and the second wall (102b).

7. A hand gripper according to claim 6, characterized in that: The angle limiting member (6) is configured to include a disc body (601), the outer periphery of which is provided with a limiting portion (602) for resisting the rotation angle position (203) of the second handle (2), a plurality of latching teeth (603) being provided on one surface of the disc body (601), a notch being provided on the surface of the disc body (601) opposite to the latching teeth (603) so that the disc body (601) can be bent and deformed, a circle of latching grooves (102a-1) cooperating with the latching teeth (603) being provided on the first wall (102a), the latching grooves (102a-1) being engaged with the latching teeth (603) in a normal state so that the position of the angle limiting member (6) is locked, and after bending and deformation, the latching teeth (603) of the angle limiting member (6) can be disengaged from the latching grooves (102a-1) to release the lock and rotate so as to adjust the angle, so that the position of the limiting portion (602) is changed to achieve adjustment of the grip distance.

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