JPS59168863A - Elastic dumbbell - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bell G used as an exercise tool.

(Prior art) Conventional cast iron bells are used to train the muscles of the wrists, arms, shoulders, etc. by grasping the central part of the bell, but since they are rigid, they are held at one end and are used to train the muscles of the wrists, arms, shoulders, etc. If the user continuously moves the bell up and down with a certain rhythm, the weight of the bell will be applied strongly to the joint, causing pain on the ulnar side of the wrist. Furthermore, when running while holding the central part of the bell, the weight load of the bell that is applied to the wrists, arms, shoulders, etc. due to the impact upon landing increases, making arm swing movements stiff. Therefore, conventional cast iron bells are not suitable for use in gymnastics or running.

In addition, conventional cast iron bells not only do not fit well in the hand, but also can cause injury when applied to the hand, scratches when applied to equipment, and give the user a cold feeling in the winter, making it difficult to use them. Make me hesitate.

(Purpose of the Invention) The present invention was developed in light of the above-mentioned circumstances, and its main purpose is to prevent strong impact on wrists, arms, shoulders, etc. when used for various exercises such as gymnastics and running. The object of the present invention is to provide an elastic bell that can provide an appropriate cushioning effect without applying force.

(Structure of the Invention) In order to achieve this object, the present invention includes filling the inside of a cylinder made of an elastic material such as rubber with an object of a predetermined weight that allows the cylinder to be flexible in the radial direction. The present invention aims to provide an elastic bell made by closing both ends of the same cylindrical body.

(Operations and Effects of the Invention) According to the elastic bell having the above structure, by changing the total weight of the objects filled inside the barrel, elastic bells of various weights with predetermined sizes optimal for use can be created. (al) Select an elastic bell with the weight that is best suited to the user's physique, grasp one end of the bell, and swing the tip of the bell up and down while moving the elbow and shoulder. When repeated, the tip of the bell flexes flexibly at the end of each lifting and lowering motion, so the weight is not concentrated on the joints, but instead is applied to the entire muscles of the forearm, upper arm, shoulder, etc. It was confirmed that the patient was moderately stimulated and felt less fatigued.

fbl If you run while holding the central part of the elastic bell with the optimal N amount described above, the shock when you land will be strong (not transmitted to your shoulders, arms, wrists, etc.) due to the cushioning effect of the elastic bell, and your arm swing movements will become stiff. It was confirmed that this would not be allowed.

(C1 From the above usage results, the elastic dumbbell exercise of the present invention,
Even when used for various exercises such as running, muscle development can be promoted by various measures during use without causing problems due to joint fatigue.

In addition, since the elastic bell of the present invention is covered with a cylindrical body made of an elastic material such as rubber, it does not give a cold feeling to the hands when used, and the cylindrical body functions as a shock absorber.
Even if you apply it to your hands or objects, the impact will be alleviated and there will be almost no damage to your hands or objects.

(Example) Below, an example of the non-speech system will be described with reference to the drawings. The elastic bell ring shown in FIG. The cylindrical body 20 is filled with a core 10 of a predetermined weight that allows flexibility, and both ends of the cylindrical body 20 are closed with camps 22 and 22. The core body 10 is made by stacking a large number of circular iron plates 11 of a predetermined thickness T1 in the thickness direction to make a predetermined length Ll, and each circular iron plate 11 is slightly radially disposed within the cylinder body 20. It is movable. The cylindrical body 20 is made of a cylindrical main body 21 made of an elastic material such as rubber, and caps 22° 22 are fixed to both ends with an adhesive.The inner circumference of the main body 21 has ribs 21a extending in the longitudinal direction as shown in FIG. As shown, they are formed at equal intervals. As a result, an air layer A1 is formed between the inner circumference of the main body 21 and the outer circumference of the core body 10. Each can knob 22 is made of an elastic material such as rubber, which is slightly harder than the main body 21, and has concentric ribs 22a formed on its inner wall surface. As a result, an air layer 2 is formed between the inner wall surface of each can knob 22 and the end surface of the core body 10.

The elastic bell constructed in this way is constructed by changing the total weight of the core body 10 by replacing the circular iron plate 11 filled inside the cylinder body 20 with another circular metal plate having a different specific gravity. It can be provided as an elastic bell of various weights without changing the external dimensions of the cylinder 20, and when used, when gripping the center or one end of the cylinder body 20 and shaking it up and down, the core body 1
The circular iron plate 11 constituting the cylindrical body 20 moves slightly in the radial direction to cause flexure at both ends or the tip of the cylindrical body 20, thereby imparting appropriate elasticity and cushioning action to the user's wrist. In addition, since the cylindrical body 20 made of an elastic material such as rubber covers the core body 10, the core body 10 does not come into direct contact with the hand during use, so the hand does not feel cold, and even if it is applied to the hand or an object, the impact is absorbed. It is absorbed by the cushioning effect of the cylinder 20 and does not cause damage to hands or equipment. Moreover, in this elastic bell, the rib 21a
Since the air IWAI and A2 are formed by 122a, the above effects can be obtained even better.

FIG. 3 shows a second embodiment of the elastic bell according to the present invention, and the elastic bell shown here consists of a core body 110 and a cylindrical body 120 covering the core body 110. The core body 110 has a predetermined length L2 by overlapping circular lead plates 111 with a predetermined thickness T2 in the thickness direction.
Each of the circular lead plates 111 is movable slightly in the radial direction within the cylindrical body 120. Cylindrical body 12
0 has caps 122, 12 on both ends of a cylindrical main body 121.
2 are fixed together with adhesive. The main body 121 consists of an outer cylinder 121A made of rubber and a cylinder 121B made of sponge, and wedge-shaped annular projections 121a are formed on the outer periphery of both ends of the outer cylinder 121A. Each can knob 122 is made of rubber that is slightly harder than the outer cylinder 121A of the main body 121, and has an annular recess 122a formed on its inner periphery into which an annular projection 121a of the outer 1M 121A fits. In this embodiment, a circular rubber plate 123 that is softer than each camp 122 is interposed between the core body 110 and the inner wall surface of each cap 122.

In the elastic bell constructed in this way, the core body is 1.10
and an inner cylinder made of sponge between the outer cylinder 121A of the main body 121],
21 B, and the core body 110 and each cap 122
There is a circular rubber plate 123 in between, which performs the same function as the ribs 21a, 22a and air JWAI, A2 of the first embodiment. Furthermore, in this elastic bell, since a lead plate, which is heavier than a steel plate, is used as the core, an elastic bell of the same weight can be made smaller than that of the first embodiment.

FIG. 4 shows a third embodiment of the elastic bell according to the present invention, and the elastic bell shown here consists of a core body 210 and a cylindrical body 220 covering the core body. The core body 210 is made by stacking circular iron plates 211 of a predetermined thickness T1 in the thickness direction to a predetermined length Ll.
Each circular iron plate 211 is movable slightly in the radial direction within the cylindrical body 220. Note that a hole 211a is provided at the center of each circular iron plate 211 for passing a mandrel 230 used when manufacturing the elastic bell, and the cylindrical body 220 is an integral body made of an elastic material such as rubber. There is. Elastic bell ring and mandrel 230 having such a configuration
The core body 210 that has been assembled in advance is placed in a mold (not shown), and rubber dough is injected into the mold and vulcanized to form the core body 23.
It is made by removing every 0. In the elastic bell constructed in this way, since the iron plate 211 having the hole 211a in the center is used as the core body 210, the weight can be reduced with the same external shape as the first embodiment.

Each of the above embodiments is a typical embodiment of the present invention, and for example, in the first and second embodiments, the cylindrical main body 2], 121 and one cap 22, 122 are integrally formed in advance. In the first to third embodiments, the outer circumferential surface of the intermediate portion of the cylindrical body 20.120.220 is subjected to anti-slip processing such as vertical stripes, stitches, twill, etc. Various changes can be made, such as making the outer shape of metal plates such as iron plates and lead plates polygonal, or configuring the core body by overlapping metal plates with different thicknesses or weights in the thickness direction. is possible.

Furthermore, in carrying out the present invention, instead of the above-mentioned core body, for example, metal particles or metal powder may be employed as an object that allows flexibility in the radial direction of the T61 body.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing a first embodiment of the elastic bell according to the present invention, FIG. 2 is a sectional view taken along line nn in FIG. 1,
FIG. 3 is a partially cutaway side view showing a second embodiment of the elastic bell according to the present invention, and FIG. 4 is a partially cutaway side view showing a third embodiment of the elastic bell according to the present invention. Explanation of symbols 10...Core body, 11...Circular iron plate (metal plate) 20.
・Cylinder body. Applicant Asahi Rubber Chemical Co., Ltd. Agent Patent Attorney Teru Hase - (1 other person) Figure 1 't'53 Figure 2 Figure 4

Claims (3)

[Claims] (1) An elastic bell made of a cylindrical body made of an elastic material such as rubber, filled with an object of a predetermined weight that allows the radial flexibility of the cylindrical body, and closing both ends of the cylindrical body. . (2) A predetermined length of multiple metal plates stacked in the thickness direction inside a cylinder made of an elastic material such as rubber = m
An elastic bell made of a cylindrical body filled with a core and closed at both ends. (3) The elastic bell according to claim 2, wherein the core body is constructed by stacking a plurality of metal disks in the thickness direction.