JP2000288117A - Training device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a training device capable of applying a large number of repeated load to muscles in a short time. SOLUTION: This training device 10 is provided with a grip 12 given a swinging motion, flexible members 14, 16 extending from both ends of the grip 12, and weights 18, 20 provided at both ends of the flexible members 14, 16. The grip 12 is swung to bend the flexible members 14, 16 by the inertia of the weights 18, 20, and a large number of repeated load can be applied to muscles in a short time by the vibration of the weights 18, 20 caused by the spring force of the flexible members 14, 16 and the inertia of the weights 18, 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a grip, a flexible member, and a pair of weights, and uses a muscle force to generate a reaction force of vibration generated by the inertial force of the weight and the spring effect of the flexible member from a swinging motion. The present invention relates to a training device to be applied for reinforcement. Such a training device can be typically used for applications such as muscle training of a healthy person and recovery of motor function of a motor dysfunction person, and at the same time, in addition to a linear vibration reaction force, By generating a torsional force, it can be effectively used for applications such as prevention of a decrease in body muscular strength under zero gravity in outer space.

[0002]

2. Description of the Related Art Conventionally, in training for strengthening muscle strength, a dumbbell having weights at both ends of a rigid rod or a butterfly machine having a weight applied to an operating portion is used to apply the force of the weight to muscles. A method of strengthening muscle strength by applying a voltage has been generally used.

In these methods, the force applied to the muscle is generated by the weight of the weight itself, and the application of the load to the muscle is repeated at a relatively slow rate due to the weight or inertia of the weight. Always.

[0004]

By the way, it has been found that repetitive exercise with a light load is effective for strengthening muscle strength. However, in the conventional training device, although it is possible to reduce the weight of the weight, there is a problem that the number of repetitions of the load on the muscle cannot be increased so much due to the configuration and use of the device. .

Accordingly, it is an object of the present invention to provide a training apparatus which can apply a large number of repetitive loads to a muscle in a short time.

[0006]

SUMMARY OF THE INVENTION In view of the above objects, the present invention solves the above-mentioned problems in the prior art and grasps an operator by a mechanism in which a weight is supported by a flexible member having a spring effect. Oscillating motion is applied to the weight at the natural frequency of the system consisting of the flexible member and the weight by utilizing the spring reaction force of the flexible member. By applying a forward / reverse force generated by this vibration, that is, an alternating force, to the muscle, a large number of repetitive loads can be applied to the muscle in a short time.

That is, according to the present invention, a grip that can be exercised through the grip of an operator, a flexible member extending from both ends of the grip, and a weight provided at both ends of the flexible member A training device for strengthening muscle strength, characterized in that the weight vibrates due to the movement applied to the grip. Preferably, in the above embodiment, the weight is attached to the flexible member so as to be changeable in position. The weight may be detachably attached to the flexible member.

Preferably, the grip is formed of a tubular member independent of the flexible member, and the tubular member is attached to the flexible member so as to be changeable in position. In addition, preferably, the grip may be formed of a tubular member independent of the flexible member, and the flexible member may be detachably attached to the tubular member. More preferably, the flexible member comprises two plate members, each of which is rotatable about a longitudinal axis of the plate member.

[0009]

The mechanism constituted by the flexible member and the weight provided at the end of the flexible member is flexible by being given a rocking motion along one axial direction by the operator. Utilizes the spring reaction force of the flexible member to vibrate at the natural frequency of the system consisting of the flexible member and the weight, thereby causing the weight to repeatedly oscillate, and the forward and reverse directions generated by this oscillating motion By applying alternating force to muscles,
A large number of repetitive loads can be applied to muscles in a short time.

Further, by attaching the weight to the flexible member so as to be changeable, the position at which the weight is attached to the flexible member can be changed. By changing the natural frequency, the number of repetitions of the load applied to the muscle can be adjusted. Similarly, by detachably attaching the weight to the flexible member, it becomes possible to change the weight of the weight, change the natural frequency of the system consisting of the flexible member and the weight, and give it to the muscle. The number of repetitions of the load can be adjusted.

In addition, by making the grip independent of the flexible member and comprising a cylindrical member having a through hole, the position of the grip on the flexible member can be changed. The torsional force can be generated by making the natural frequencies of the two systems, which are formed on both sides of the grip, each composed of a flexible member and a weight, different from each other. Further, by forming the grip with a cylindrical member independent of the flexible member, the flexible member can be exchanged, thereby changing the natural frequency of the system including the flexible member and the weight. It is also possible to do.

In addition, in the above embodiment, the flexible member is constituted by two plate-like members, and each plate-like member is rotatable. Can be changed with each other to generate a torsional motion about the axis of the oscillating direction of the external force applied to the grip.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The training apparatus according to the present invention will be described below in more detail with reference to the embodiments shown in the accompanying drawings. 1 to 5 are views showing a training apparatus according to a preferred embodiment of the present invention, FIG. 1 is a schematic perspective view of the training apparatus of the present invention, and FIG.
1 is a partial cross-sectional front view of the training device of the present invention shown in FIG. 3, FIG. 3 is a partial cross-sectional side view of the training device shown in FIG. 1, and FIG. 4 is a schematic perspective view of the training device different from the states shown in FIGS. FIG. 5 is a conceptual diagram showing the angle α formed by the bending surfaces of the pair of flexible plates and the swing direction.

Referring to FIGS. 1-3, a training apparatus 10 of the present invention comprises a grip 12, flexible plates 14, 16 attached to both ends of the grip, and both ends of the flexible plates 14, 16. Weights 18 provided in the respective parts,
20. The grip 12 is a grip outer cylinder 22a.
And 22b. Grip outer cylinder 22a
And 22b each have a bore therethrough, the bore further comprising smaller bore portions 24a and 24b and a larger bore portion 26a.
a and 26b. Small bore 2
4a and 24b and large-diameter inner hole portions 26a and 26b form shoulders 28a and 28b at their boundaries, respectively. Inside the grip outer tube 22a, a kamaboko-shaped holding plate 3
0a and 30b are arranged, and two kamaboko-shaped holding plates 3
Oa and 30b sandwich the upper and lower surfaces of the base of the flexible plate 14 so that the flexible plate 14
Attached to. One ends of the holding plates 30a and 30b are in contact with the shoulder 28a. Similarly, the flexible plate 16 is attached to the grip outer cylinder 22b by the crab-shaped holding plates 30c and 30d arranged inside the grip outer cylinder 22b, and one end of the holding plates 30c and 30d is connected to the shoulder 28b. Is in contact with Also, for retaining
One ends of the flexible plates 14 and 16 have bends 14 'and 16', respectively.

The grip outer cylinders 22a and 22b are provided with a male screw portion 32 and a female screw portion 34 which are screwed to each other, and the flexible plates 14 and 1 are loosely tightened.
By rotating the flexible surfaces about the longitudinal axis 6 of FIG. 6, the two flexible surfaces can be set to have an arbitrary relative angle as shown in FIG. When the grip outer cylinders 22a and 22b are screwed together and tightened,
In order to keep the relative angle between the flexible plates 14 and 16 at an arbitrary set angle, a cylindrical rubber cushion 36 serving as a detent is inserted between the respective ends of the flexible plates 14 and 16. , Has been compressed.

Further, by loosening the engagement between the male screw part 32 and the female screw part 34 and disengaging the grip outer cylinders 22a and 22b, the holding plates 30a, 30b, 30c, 3
Od can be extracted from the inside of the grip outer cylinders 22a and 22b, and the flexible plates 14 and 16 can be replaced with flexible plates of other shapes or materials.

A mesh-like groove (not shown) for preventing slippage may be provided on the outer peripheral surfaces of the grip outer cylinders 22a and 22b so as to facilitate the loosening operation. Each of the flexible plates 14 and 16 attached to the grip 12 as described above has a long groove 3 extending along the longitudinal axis of the flexible plates 14 and 16 at the other end, respectively.
8a and 38b are provided, and thumb screws 40a and 4b are provided.
The weights 18 and 20 are attached to arbitrary positions of the long grooves 38a and 38b by an arbitrary fastener such as Ob and nuts 42a and 42b. The weights 18 and 20 are
By loosely tightening Oa and 40b, it is possible to move to any position along the long grooves 38a and 38b, or to exchange them with another weight. Weights may be attached to both sides of the flexible plates 14 and 16. In addition, the weights 18 and 20 can take an annular shape. In this case, the weights 18 and 20 are fixed to the flexible plates 14 and 16 by snap-type fasteners provided in the inner hole portions. Can be fastened to the flexible plates 14 and 16 in cooperation with the serrated cutouts provided on the surface of the.

In the above embodiment, the flexible member is composed of, for example, two long flexible plates 14 and 16, but may be composed of one member. Again, in this case,
In the same manner as described above, the weights 18 and 20 are attached to the flexible member. It is a matter of course that the same operation as in the above-described embodiment can be obtained by fixing the grip 12 at an arbitrary position of this flexible member made of one member by any known means.

In the above embodiment, each component is formed as an independent member. However, for example, a flexible member and a grip can be formed integrally. That is, by increasing the cross-sectional area of the central portion of the flexible member, the central portion of the flexible member can have a grip function. Similarly, it goes without saying that the flexible member and the weight can be integrally formed.

A material suitable for the flexible member such as a flexible plate is spring steel or the like. Also, the cross section of the flexible member may be circular, elliptical, or any other shape. Next, the operation of the training device 10 will be described with reference to FIGS. For the sake of explanation, as shown in detail in FIGS. 1 and 4, the longitudinal axis of the flexible plate is defined as XX ′ axis 44, and the axis along the direction of the swing motion applied to the grip 12 is defined as Z. -Z 'axis 48, X
The axis perpendicular to the X 'axis 44 and the ZZ' axis 48 is Y-
Defined as Y 'axis 46. Also, the weights 18 and 20 are shown in FIG.
As shown in, and those attached to the distances L ₁ and L ₂ from the center of the grip 12 along the X-X 'axis 44 on each flexible plate 14 and 16.

First, the operation of the training apparatus 10 will be described in the case where the relative angle α (see FIG. 5) between the flexible surfaces, which are the wide surfaces of the flexible plates 14 and 16, is zero.
When the user of the training apparatus 10 of the present invention grips the grip 12 with one hand or both hands and applies vibration in the ZZ ′ axis 48 direction, that is, swinging motion, the bending of the flexible plates 14 and 16 becomes X. A system formed in the plane including the -X 'axis 44 and the ZZ' axis 48 and comprising the flexible plate 14 and the weight 18 on the left side of the grip 12 in FIG. 1 and the right side of the grip 12 in FIG. A system composed of a certain flexible plate 16 and a weight 20 vibrates at the natural frequency of each system. By repeatedly applying the vibration reaction force in the ZZ 'axis 48 direction given by this vibration to both hands in a short time a large number of times, the muscle strength is strengthened.

Further, by changing the attachment position of the weight to the flexible member or by changing the shape or rigidity of the flexible member by exchanging the flexible member, the weight is made up of the flexible member and the weight. By changing the natural frequency of the system, the number of repetitions of the load applied to the muscles of the operator can be adjusted. further,
By replacing the weight and changing the weight of the weight, it is also possible to adjust the load itself applied to the muscle of the operator.

Next, as shown in FIGS. 4 and 5, the flexible surfaces of the flexible plates 14 and 16 are rotated about the XX 'axis 44 to form a relative angle of .alpha. In this case, the operation of the training device 10 will be described. As in the case where the angle α is zero, Z
When a oscillating force is applied in the Z direction of the -Z 'axis 48, the system including the flexible plate 14 and the weight 18 and the system including the flexible plate 16 and the weight 20 bend in directions different from each other by an angle α. Is generated. Here, the component of the oscillating force acting on the system composed of the flexible plate 14 and the weight 18 in the YY 'axis 46 direction and the ZZ' axis 48
The magnitudes of the directional components are F ₁ and F ₁ ′, respectively, and the oscillating power Y− acting on the system composed of the flexible plate 16 and the
Y 'axis 46 direction component and Z-Z' axis 48 direction component magnitude, respectively and F ₂ and F ₂ '. Then, Z-Z '
The reaction forces of the respective systems formed on the left and right sides of the grip 12 with respect to the oscillating force applied in the Z direction along the axis 48 are represented by F ₁ ′ and F ₂ ′ with respect to the Z-Z ′ axis 48 direction component, respectively. next, with respect to Y-Y 'axis 46 direction component, F _1, the ─F ₂ (here, the Z direction and the Y direction as a positive direction). By the way, assuming that the weights of the flexible plates 14 and 16 are very small and negligible compared to the weights of the weights 18 and 20, the above-mentioned reaction force is
Can be regarded as acting on. Therefore, the training device 10 of the present invention includes the torque F ₁ × L ₁ acting on the weight 18 and the torque ─F ₂ acting on the weight 20.
× L ₂ generates a clockwise torsional force about the ZZ ′ axis as viewed from the Z ′ side.

Next, when a oscillating force is applied to the grip 12 in the Z 'direction of the ZZ' axis 48, the left side of the grip 12 against the oscillating force applied in the Z 'direction along the ZZ' axis 48 and The reaction force of each system configured on the right side is
Regarding the components in the direction of the ZZ ′ axis 48, {F ₁ ′,
─F ₂ ′, and regarding the component in the direction of the Y-Y ′ axis 46, ─
F ₁ and F ₂ are obtained. Therefore, the training apparatus 10 of the present invention has ZZ ′ by the torque ΔF ₁ × L ₁ acting on the weight 18 and the torque F ₂ × L ₂ acting on the weight 20.
A torsional force is generated in the counterclockwise direction about the axis as viewed from the Z ′ side.

Thus, when the oscillating power in the ZZ 'axis 48 direction is applied to the grip 12 when the flexible surfaces of the flexible plates 14 and 16 have a relative angle α to each other, the forces F ₁ ′ and F ₂ ′, And a torsional reaction force centered on the ZZ ′ axis 48 due to the forces F ₁ and F ₂ .

Further, the weights or mounting positions of the weights 18 and 20 are set so that the natural frequency of the system consisting of the weight 18 and the flexible plate 14 and the natural frequency of the system consisting of the weight 20 and the flexible plate 16 are different. If the rigidity or length of the flexible plates 14 and 16 is selected, a torsional reaction force about the Y─Y ′ axis 46 can be generated. As described above, (1) the relative angle α between the flexible plate 14 and the flexible plate 16, (2) the size of the weights 18 and 20, and (3) the flexible plate of the weights 18 and 20 Positions L ₁ and L _{2 at} 14 and 16; (4)
The rigidity of the flexible plates 14 and 16 is selected according to the user's physical strength and the purpose of exercise with reference to Table 1, and the linear reaction force against the own weight of the training device and the applied swinging power and the torsion are selected. A training apparatus is provided for strengthening muscular strength by applying a reaction force to the body and repeatedly applying the reaction force to the body in a short time.

[0027]

[Table 1] For example, 1. A flexible plate having a thickness of 3 mm, a width of 29 mm, and a length of 640 mm is attached to a tip portion (that is, L ₁ = L ₂ = 640 mm).
When a 5 kg weight is attached, it has been found that the natural frequency of the system consisting of the flexible plate and the weight is 1.6 Hz. In addition, by suspending the training device of the present invention, the action force due to its own weight of the training device is reduced to substantially zero as in the outer space, and the swing reaction due to the natural frequency of the system composed of the weight and the flexible plate is performed. Of course, only force can be applied to the body.

[0028]

As described above, according to the training apparatus of the present invention, when the operator applies a swinging motion to the grip, the system comprising the flexible plate and the weight is formed by the spring action of the flexible plate. Vibrates at its natural frequency, and a large number of repetitive loads are applied to the muscles of the body in a short time by the vibration reaction, thereby strengthening the muscular strength.

If the bending surfaces of the flexible plates on both the left and right sides of the grip form an angle with each other, a torsional force about the axis of the oscillating motion is simultaneously applied to the body.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a training device of the present invention.

FIG. 2 is a partial sectional front view of the training apparatus of the present invention shown in FIG.

FIG. 3 is a partial cross-sectional side view of the training device shown in FIG. 1;

FIG. 4 is a schematic perspective view of a training apparatus different from the states shown in FIGS. 1 and 2;

5 is a conceptual diagram showing a training apparatus viewed from an X direction in FIG. 4, and showing an angle α formed by a bending surface of a pair of flexible plates and a vibration direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Training apparatus 12 ... Grip 14 ... Flexible board 16 ... Flexible board 18 ... Weight 20 ... Weight

Claims (6)

[Claims] 1. A grip provided with a movement through an operator's grip, a flexible member extending from both ends of the grip, and weights at both ends of the flexible member. A training device for strengthening muscular strength, wherein the weight vibrates due to a given movement. 2. The training device according to claim 1, wherein the weight is variably attached to the flexible member with respect to position. 3. The training device according to claim 1, wherein the weight is detachably attached to the flexible member. 4. The grip according to claim 1, wherein the grip comprises a tubular member independent of the flexible member, and the tubular member is attached to the flexible member so as to be changeable in position.
The training device according to claim 1. 5. The training device according to claim 1, wherein the grip is formed of a tubular member independent of the flexible member, and the flexible member is detachably attached to the tubular member. . 6. The training apparatus according to claim 5, wherein the flexible member comprises two plate members, each of which is rotatable about a longitudinal axis of the plate member. .