JPH1076035A - Fist training appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an exercise for the rotation of a wrist in an actual game with hands and train the wrist via a push-up without fixing the wrist by storing a bearing device in a housing tray and holding a rotary cover on the inner race of the bearing device. SOLUTION: A fist training appliance 12 is formed so that a rotary cover is held on the inner race of a ball bearing in such a state as freely rotatable in a housing tray. In this case, two such fist training appliances are prepared and placed on a floor at a distance approximately equal to shoulder breadth. A person M to make an exercise closes his/her hands and holds the body with both fists placed on the appliances 1 according to normal push-up procedures. In this state, both arms are bent like the case of a push-up and then stretched. In this case, when the wrists are half twisted intentionally. the rotary cover rotates and then the directions of the wrists change, As a result of the repetition of the training, the twist of the wrists nearly equal to an actual game with hands can be experienced and the wrists themselves can be trained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fist training tool used for training a fist in karate practice.

[0002]

2. Description of the Related Art In karate, forward fist thrust is one of the basic actions, and it is ideal that one fist thrust will surely defeat the opponent, as the name of one fist deadly shows. Therefore, those who study karate practice routinely to train their fists, such as push-ups with sowing straws and regular fists (so-called fist-push-downs).

[0003] The basic operation of the forward fist thrust is to hold the fist almost under the armpit, and then to vigorously push the fist forward while half-twisting the fist, so that the wrist always rotates. However, when practicing push-ups with a normal fist, the fist cannot be rotated during push-up because the fist is fixed to the floor. Therefore, the practice of doing push-ups with a forward fist tends to be a training in which one cannot practice the shape of an actual forward fist but only trains the arm muscles.

In a conventional push-up with a fist fixed on the floor, the push-up can be performed relatively easily because the wrist is also fixed. However, if you can do push-ups with the fist rotatable, you can train the wrist as much as the wrist is not fixed.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such a background, and it is possible to train a wrist in an actual front fist, and to do push-ups without fixing the wrist. It is an object of the present invention to provide a fist training tool capable of training a wrist by using the fist training tool.

[0006]

The fist training tool of claim 1 is:
The bearing device includes a storage plate, a bearing device housed in the storage plate, the bearing device including an inner race, an outer race, and a ball bearing between the two races, and a rotating lid supported by the inner race of the bearing device. It is characterized by the following.

According to a second aspect of the present invention, in the fist training tool, the rotary lid has a fitting portion fitted into the inner race, and an outer peripheral surface of the fitting portion is to ensure a fitting state with the inner race. And a contact portion that contacts the upper end of the inner race is formed around the fitting portion.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a fist training tool of the present invention, and the fist training tool 1 includes a storage plate 3 and a bearing device 5.
And a rotary lid 7.

The storage tray 3 is formed by forming a ring-shaped side wall 11 having a constant height around a circular bottom surface 9, and is entirely made of hard plastic. An upper portion of the storage plate 3 is open, and a storage portion 4 is formed inside the storage plate 3 so that the bearing device 5 can be stored therein.

The bearing device 5 comprises an outer race 13, a ball bearing 15 immediately inside the outer race 13, and an inner race 17 further inside the outer race 13. The outer race 13 has an outer diameter substantially equal to the inner diameter of the storage portion 4 of the storage tray 3, so that the outer race 13 can be fitted into the storage portion 4 exactly. An inner groove 19 is formed on the entire inner surface of the outer race 13.

The ball bearing 15 is a ball support 21
The ball support 21 has a plurality of balls 23
Is rotatably supported. Each ball 23 projects partially outside and inside the ball support 21, and the portion projecting outside is rotatably received in the inner groove 19 of the outer race 13 and supported at the same time.

The inner race 17 has an outer groove 20 on its outer peripheral surface.
2 (see FIG. 2), and the portion of the ball 23 projecting inward of the ball support 21 is received and supported in the outer groove 20 in a rotatable state. In this way, the ball bearing 15 is supported so as to be able to rotate in the circumferential direction with respect to both the outer race 13 and the inner race 17.

The rotary lid 7 has a top surface 25, a cylindrical side wall 27 extending downward from the periphery thereof, and a cylindrical fitting portion 29 extending downward from the top surface 25 near the center of the top surface 25.
And a contact portion 33 formed along the periphery of the fitting portion 29.

The inner diameter of the cylindrical side wall 27 is slightly larger than the outer diameter of the side wall 11 of the storage tray 3. Therefore, when the rotating lid 7 is put on the storage tray 3, the rotating lid 7 can rotate without contacting the side wall 11 of the storage tray 3.

The fitting portion 29 is a portion that fits into the inner race 17 of the bearing device 5, and its outer peripheral surface is formed with four convex portions 31 at circumferential intervals of 90 degrees. ing. The interval between the outer ends of the convex portions 31 facing each other is substantially equal to the inner diameter of the inner race 17. As a result, the fitting portion 29 can fit into the inner race 17 exactly, and the fitting portion 29 once fitted does not easily come off the inner race 17.

A contact portion 33 is formed on the lower surface of the top surface 25 along the periphery of the fitting portion 29. This contact portion 33
1 is shown by a circular dotted line in FIG. 1 and is shown like a step around the fitting portion 29 in the cross section of FIG.

As shown in FIG. 2, the contact portion 33 is in contact with the upper surface of the inner race 17. The portion outside the contact portion 33 on the back side of the top surface 25 of the rotating lid 7 is the ball bearing 1.
5 or the upper end of the storage tray 3 is not in contact. Therefore, the weight of the rotating lid 7 and the downward load applied to the rotating lid 7 are supported by the inner race 17 of the ball bearing 15. As a result, the rotary lid 7 can freely rotate with respect to the storage tray 3 together with the inner race 17.

The fist exerciser 1 of the present invention has the above-described structure, and a method of using the same will be described below with reference to FIG.

First, two fist training tools 1 of the present invention are prepared, and they are placed on the floor at a distance substantially equal to the shoulder width. As shown in FIG. 3, the trainer M squeezes the fists of both hands and places the fists on both hands on the fist training tool 1 to support the body in the manner of performing push-ups.

In this state, both arms are bent so as to do push-ups, and are extended. At this time, if the wrist is intentionally twisted halfway, the rotating lid 7 rotates and the direction of the fist changes. By repeating such training, you can experience the twisting of the wrist close to the actual true fist thrust,
You can also train the list itself at the same time. Alternatively, the rotating lid 7 may be allowed to rotate naturally with the bending and extension of both arms without intentionally twisting the wrist. In this case, since no excessive force is applied to the wrist, it is suitable for beginner training.

[0021]

As described above, according to the present invention, when performing push-ups with a regular fist, the slidable lid can be easily rotated by consciously twisting the wrist halfway. You can experience wrist twisting close to the fist thrust.
This also allows the wrist itself to be trained at the same time.

Also, without intentionally twisting the list,
If you let the revolving lid rotate naturally with the bending and extension of both arms, no excessive force is applied to the wrist,
Suitable for beginner practice.

[Brief description of the drawings]

FIG. 1 is an exploded, partially transparent perspective view of a fist training tool of the present invention.

FIG. 2 is a side sectional view of the fist training tool of the present invention.

FIG. 3 is an explanatory view showing how a fist training tool of the present invention is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fist training tool 3 Storage dish 4 Storage part 5 Bearing device 7 Rotating lid 9 Bottom surface 11 Side wall 13 Outer race 15 Ball bearing 17 Inner race 19 Inner groove 20 Outer groove 21 Ball support 23 Ball 25 Top surface 27 Side wall 29 Fitting portion 31 convex part 33 contact part M trainer

Claims (2)

[Claims] 1. A bearing device, comprising a storage plate, a ball bearing housed in the storage plate and having an inner race, an outer race, and a ball bearing between the two races, and a rotary lid supported by the inner race of the bearing device. A fist training tool characterized by comprising: 2. The rotating lid has a fitting portion fitted into the inner race, and a convex portion is formed on an outer peripheral surface of the fitting portion to ensure a fitting state with the inner race. 2. The fist training tool according to claim 1, wherein a contact portion is formed around the fitting portion to contact an upper end of the inner race.