JPH0245909B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a hand gripper that makes it possible to strengthen grip strength and measure grip strength, and in particular, to a hand gripper that can count the number of gripping movements and display the grip strength value using a single counter. This relates to a hand gripper.

[Prior art]

A hand gripper with a built-in spring has been proposed as a device to strengthen grip strength, and after gripping this hand gripper with one hand,
By repeating the action of gripping this against the spring force as many times as possible, the muscle strength of the hand can be trained and the grip strength can be strengthened. In such muscle strength training, it is important to repeat a predetermined number of movements every day, and it is preferable to count the number of movements. In addition, in order to judge whether the number of movements, etc. of grip strength training is appropriate, it is also necessary to measure the grip strength on a daily basis.

For this reason, a hand gripper with a built-in counter or grip dynamometer for counting the number of gripping movements has been proposed and put into practical use. For example, the present inventor's previous proposal includes two mechanical counters built into the hand gripper, one counter counts and displays the number of gripping operations, and the other counter displays the gripping force value. There is. In this case, the number of grip operations is counted by a counter configured to count the number of reciprocating operations of the movable part of the hand gripper,
Furthermore, for measuring the grip force value, an internal mechanism is configured such that a counter can display the amount of operation stroke of the movable part of the hand gripper.

According to this hand gripper, it is possible to train grip strength extremely effectively, but the structure is difficult because it requires two internal mechanical counters and a mechanism to drive each of them. It is unavoidable that the system becomes complicated, becomes an obstacle to reducing the weight for portable use, and is also disadvantageous when trying to reduce costs.

[Summary of the invention]

The present invention has been made in view of the above problems, and a hand gripper is provided with one mechanical counter, and a counting mechanism and a measuring mechanism that can operate the counter in conjunction with a movable part of the hand gripper are provided. By configuring the connection state of the counter and these counting mechanisms and measuring mechanisms to be switchable, the number of counters can be reduced and the internal structure can be simplified, thereby achieving weight reduction and cost reduction of the hand gripper. Can be done.

〔Example〕

The present invention will be explained below based on the drawings.

FIG. 1 is an overall configuration diagram of the hand gripper of the present invention, in which upper and lower movable cases 2 and 3 are loosely fitted to the top and bottom of a case body 1 as a frame, respectively, and between these two movable cases 2 and 3. Coil springs 4, 4 are inserted to bias both movable cases 2, 3 in directions away from each other. Furthermore, these movable cases 2 and 3 are configured so that they do not come off from the case body 1 using a stopper (not shown), and a person can hold both movable cases 2 and 3 with one hand and hold them against the spring 4. , 4 in the direction of proximity to each other against the force, it is possible to train the grip strength and measure the grip strength value. Further, the case body 1 is provided with one mechanical counter 5 and a switching button 6, and by operating the switching button 6 as a switching mechanism to be described later, the counter 5 can be set to the number of grip force movements,
The grip strength values are displayed individually.

As shown in FIG. 2, the internal structure of the case body 1 includes a counting mechanism 7 and a measuring mechanism 8 in relation to the counter 5 and the switching button 6.
Further, a rack 9 integrally provided with the lower movable case 3 is housed inside the case body 1, and is connected to the counting mechanism 7 and the measuring mechanism 8.

That is, the rack 9 has a rack tooth 9a extending along the length direction on a part of the width direction of the surface, and a rack thickness adjacent to the rack tooth 9a in the width direction and a part of the length direction. They are each integrally formed with a taper cam 9b having a partially enlarged taper cam 9b, and are reciprocated and linearly moved in the vertical direction in FIG. 2 as the lower movable case 3 moves.

The counter 5 has three number wheels 10 in this example.
a, 10b, 10c and the drive gear 12 are arranged coaxially, and shift pinions 11a, 11b, 11c are inserted between these number wheels and the drive gear, and the drive gear 12 is rotated by a known stepping motion. A numerical value corresponding to the amount of movement is displayed from the window 1a of the case main body 1 using each number wheel. The counter 5 is also provided with a reset button 5a, which allows each number ring to be forcibly returned to zero.

As shown in FIG. 3, a perspective view of the counting mechanism 7 and the measuring mechanism 8, each of these mechanisms is connected to the case body 1.
It is assembled to a fixed shaft 13 that is supported at both ends along.

The counting mechanism 7 has a pole 14 whose center is loosely inserted into the fixed shaft 13 and is movable along this axis, and which is swingable by a small angle in the vertical direction in FIG. 3 using this shaft as a fulcrum. It is biased in one swing direction by a torsion spring 15 wound around the shaft 13.
A pair of pawl claws 14a and 14b having a known structure are formed at the tip of this pawl 14 so as to be able to engage with the drive gear 12 of the counter 5, and one reciprocating swing of the pawl 14 moves the drive gear 12 into a predetermined position. The angle can be rotated. Furthermore, two holes are formed at the base end of the pole 14, into which the dowels of the pole lever 16 are press-fitted and integrally connected. This pole lever 16 extends parallel to the fixed shaft 13, has its tip positioned above the rack 9, and has a cam contact body 16a protruding from the lower side of the tip. This cam contact body 16a is arranged close to the surface of the rack 9, and when the pawl lever 16 is moved together with the pawl 14 along the fixed shaft 13 in the right direction in the figure, it is positioned in a plane on the movement locus of the taper cam 9b. The pole 14 collides with the lever and swings the tip of the pole 14 upward. Note that when the cam contact body 16a is not in abutment with the tapered cam 9b, the pawl 14 is oscillated to a position where each pawl 14a, 14b of the pawl 14 does not mesh with the drive gear 12.

On the other hand, the measuring mechanism 8 consists of a main gear 17 on the right side in the figure loosely inserted into the fixed shaft 13, and a driven gear 1 on the left side thereof.
8. The main gear 17 is configured as a so-called pinion, and the rack teeth 9a of the rack 9
The rack 9 is always engaged with the rack 9 and rotated as the rack 9 moves back and forth. Further, the driven gear 18 meshes with the drive gear 12 in its normal axial position, and is disengaged from the drive gear 12 when it is axially moved in the right direction in the figure. And these Lord,
The respective bosses 17a and 18a of the subordinate gears 17 and 18 face and abut each other, and a clutch spring 19 is fitted around these bosses.
This clutch spring 19 contracts in diameter due to frictional force only when the main gear 17 is rotated in the clockwise direction shown in the figure, integrating the main and slave gears, and increases in diameter when the main gear 17 is rotated in the opposite direction. Both gears are separated.

The pole 14 of the counting mechanism and a portion of the follower gear 18 of the measuring mechanism 18 are sandwiched between the back yokes 6a, 6a of the switching button 6, which is operated to move left and right in the figure along the case body 1. is,
As the switching button 6 is moved from side to side, the pawl 14 and the follower gear 18 are forcibly moved in the axial direction on the fixed shaft 13. This switching button 6 puts the hand gripper into a state where it counts the number of gripping operations when it moves to the right in FIG. 3, and puts it into a state where it measures a pressure value when it moves to the left. Note that the switching button 6 is provided with a click mechanism (not shown), and is stably switched and moved to a predetermined left and right position.

Since the hand gripper of the present invention is constructed as described above, when counting the number of times of gripping force, the switching button 6 is moved to the right in the figure. Then,
As shown in FIG. 4, the cam contact body 16a of the pawl lever 16, which is integral with the pawl 14, is moved to the right to a plane position where it abuts against the taper cam 9b of the rack 9, and at the same time, as shown in FIG. The slave gear 18 is moved to the right together with the main gear 17 and becomes the driving gear 1.
The mesh with 2 is released.

Therefore, by repeatedly grasping and releasing the upper and lower movable cases 2 and 3, that is, by repeating the grasping operation, the upper and lower movable cases move relative to the case body 1, and the rack 9 also moves with respect to the case body 1. When the ball lever 16 is reciprocated in its length direction, the taper cam 9b pushes up the scrap contact body 16a each time the ball lever 16 moves up and down. As a result, the pawl 14 swings vertically about the fixed shaft 13 as a fulcrum, and one reciprocating swing causes the drive gear 12 to rotate intermittently for one step.
By repeating this, the counter 5 sequentially advances the number wheels 10a, 10b, and 10c, and counts and displays the number of reciprocating movements of the rack 9, that is, the number of times it is gripped. During this time, the rack tooth 9a of the rack 9
Even if the main gear 17 and the driven gear 18 are rotated by the rotation, the driven gear 18 is not meshed with the drive gear 12 as described above, so this rotational force is not transmitted to the drive gear 12.

On the other hand, when the switching button 6 is moved to the left in the drawing, the pawl 14 and the driven gear 18 (the same goes for the main gear 17) are axially moved to the left in the drawing, and the cam contact body 16a of the pawl lever 16 is moved as shown in FIG. The driven gear 18 is located outside the movement locus of the tapered cam 9b and meshes with the drive gear 12. Therefore, even if the rack 9 is reciprocated, the cam contact body 16a is not moved up or down, and the pawl lever 16 and the pawl 1
4 remains stationary, and the pawl claws 14a, 14b are placed in a neutral position where they do not mesh with the drive gear 12. On the other hand, when the main gear 17 is rotated clockwise due to the forward movement of the rack 9, the clutch spring 1
9 is reduced in diameter to integrate the follower gear 18, and the main gear 17
The rotational force is transmitted to the drive gear 12 via the driven gear 18 to continuously rotate it. Therefore,
The drive gear 12 is rotated by an angle proportional to the amount of movement of the rack 9, that is, the amount corresponding to the grip force value, and the number wheels 10a, 10 are rotated with the corresponding value as the grip force value.
b, 10c. When the rack 9 moves backward, the main gear 17 is rotated counterclockwise, so the clutch spring 19 increases in diameter and separates the main and slave gears, leaving the slave gear 18 as it is and the main gear 17. only is rotated back.

As described above, according to this hand gripper, by simply switching the switching button 6,
Since each counter 5 can count and display the number of grip movements and measure and display the grip force value, the number of counters can be reduced compared to conventional ones, and at the same time, the internal structure is simplified and lightweight. Moreover, it can be manufactured at low cost.

Here, in the above embodiment, the pole 14 and the follower gear 18 are moved directly by the switching button 6, but they may be moved via a lever, and the switching operation can be reduced by changing the lever ratio. You can do it like this. Further, the switching button itself may be constructed of a lever.

〔Effect of the invention〕

As described above, according to the hand gripper of the present invention, one mechanical counter is provided, and a counting mechanism and a measuring mechanism that are linked to the movable part of the hand gripper are provided, and the connection state between the counter and these counting mechanism and measuring mechanism is provided. Since it is configured so that it can be switched, one counter can count and display the number of grip force movements and measure and display the grip force value, reducing the number of counters and simplifying the internal structure. This has the effect of reducing the weight and cost of the hand gripper.

[Brief explanation of drawings]

Fig. 1 is a partially exploded perspective view showing an outline of an embodiment of the present invention, Fig. 2 is a plan view of the internal structure, Fig. 3 is a perspective view of the main part, and Fig. 4 is an enlarged perspective view of a part thereof. 5 is a simplified plan view for explaining the driving path in the counting state, and FIG. 6 is a simplified plan view for explaining the driving path in the measuring state. 1...Case body, 2...Upper movable case, 3...
...Lower movable case, 4...Spring, 5...Mechanical counter, 6...Switching button, 7...Counting mechanism, 8...Measuring mechanism, 9...Rack, 10
a, 10b, 10c...number wheel, 12...drive gear, 13...fixed shaft, 14...pole, 14a,
14b... Pole claw, 15... Torsion spring, 16... Pole lever, 16a... Cam contact body, 17... Main gear, 18... Follow gear, 19...
...Clutch spring.

Claims (1)

[Scope of Claims] 1. A hand gripper including a movable case supported by a spring on a case body, and configured to move the movable case against the spring force by a gripping operation, wherein the case body includes a movable case.
a mechanical counter, a counting mechanism that is linked to the movable case to count the number of grip force movements that can operate the counter, and a measuring mechanism that measures the grip force value; A hand gripper characterized by comprising a switching mechanism that can switch the state of connection with the mechanism. 2. The movable case has a rack integrated therein, and the counting mechanism is a ratchet mechanism that is intermittently oscillated by the linear movement of this rack to feed the counter drive gear, and the measuring mechanism meshes with the rack to drive the counter. The hand gripper according to claim 1, wherein the hand gripper is a pinion mechanism that continuously rotates a gear, and the switching mechanism is configured to connect and disconnect between the rack and the ratchet mechanism, and between the pinion mechanism and the counter. .