WO2002102474A1

WO2002102474A1 - Racket weight

Info

Publication number: WO2002102474A1
Application number: PCT/JP2001/005093
Authority: WO
Inventors: Koji Okamoto
Original assignee: Koji Okamoto
Priority date: 1999-12-28
Filing date: 2001-06-14
Publication date: 2002-12-27
Also published as: JP2001187173A; JP3536147B2

Abstract

A racket weight (5D) removably mounted on or adjacent a joint (4) between a grip (2) and a racket surface (3) of a racket (1) and allowing the user to train for muscle building while actually striking balls or doing practice swings. This weight (5D) is made of elastic resin material or shock absorbing material and shaped in the form of a thick flat elastic ring, and is formed in the inner wall thereof with a concavoconvex portion (A) fit to the outer shape of the mount region of the racket (1). Further, filling members or weight members (8) made of a material of high specific gravity is built-in or embedded or half-embedded in symmetric positions with respect to the transverse or longitudinal centerline of the thick portion. And, equal weights are added to front and back and/or right and left sides of the racket (1) or racket surface (3) in the mount region.

Description

Technical Description Weight for Racket

INDUSTRIAL APPLICABILITY The present invention is suitable for racket I. Here, the racquet refers to a tennis racquet, a soft tennis racquet, a zotomington racquet, a squash racquet, a racquetball racquet and other hitting tools having strings. Background art

In a racket used for tennis, etc., the player must judge by instantly changing the grip grip angle and the contact surface against the flying ball, and over a long period of time. It is a game to play, and it is necessary to constantly train and improve muscle strength.

In addition, the racket must be shaken accurately and in a timely manner. During training, wearing a ゥ I (weight) and practicing ball hitting or swinging, To remove the ゥ X from the racket, the player can swing faster and more easily, and practice muscular strength.

Hitherto, as a vibrating element for swinging, one mounted on a ball striking surface (string) has been known. In this case, it is not possible to perform training while actually hitting the ball, and the present invention aims to increase the muscle strength while attaching the weight to the racket and actually hitting the ball or swinging. Training to improve swing speed and swing balance. This is to provide a clear racket I-sheet. Disclosure of the invention

As a means for this, a ラ: t-it is provided detachably at the joint between the grip portion and the bracket surface or near the joint, and using this A-Ait, different weights can be used. The muscle strength can be improved by selecting a dit and mounting it on a rack to control the load by changing the weight of the dit itself, or by changing the mounting position of the dit. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a front view showing an embodiment of the present invention (Example 1 described later).

FIG. 2 is also a plan view.

FIG. 3 is a sectional view of the same.

FIG. 4 is a plan view showing another embodiment of the present invention (Example 2 described later).

FIG. 5 is a plan view showing still another embodiment of the present invention (third embodiment described later).

FIG. 6 is a front view showing still another embodiment of the present invention (Example 4 to be described later).

FIG. 7 is a plan view of the same.

FIG. 8 is a front view showing still another embodiment of the present invention [Embodiment 5 to be described later].

FIG. 9 is also a plan view.

FIG. 10 is a sectional view taken along the line I-I in FIG. FIG. 11 is a sectional view taken along the line II-II in FIG.

FIG. 12 is a front view showing a use state of the present invention.

For reference, explanations of the symbols are listed. These reference numerals are used in addition to the terms in the following description for explaining the details of the invention with reference to the accompanying drawings. The underline of the reference sign means the entire configuration.

1 racket

2 Grip section

3 rackets

4 Joint

5 weights

5 A wait

5 B Wait

5 C wait

5 D weight

5 a Top plate

5 b back plate

6 screws

7 hook

8 Packing material or load material

A Uneven portion Best mode for carrying out the invention

The present invention will be described in more detail with reference to the accompanying drawings.

A first embodiment of the present invention is shown in FIGS. In addition, the use state Figure 12 shows. [The use state is common to the following embodiments. As shown in each figure, the bracket for this embodiment: The bracket () is, as understood from the invention described in any one of claims 1 to 3, a bracket. In (1), a weight () is detachably provided at the joint (4) or near the joint (4) from the grip (2) to the rack surface (3). Here, the joint portion (4) means a throat portion extending from the grip portion (2) to the racket surface (3), or an open throat portion extending from the grip portion (2) to both ends of the racket surface (3). . The vicinity of the joint (4) refers to a position or area including the throat or open throat part and a part of the bracket surface (3), or a part of the bracket surface (3).

The I-It () is a flat ring having flexibility or elasticity, and the inner wall is formed with an uneven portion (A) along the bracket. A) is tapered so that it can adapt to the size of the racket frame, and has a structure that does not fall in the grip direction. Further, when the concave and convex portion (A) is mounted on the racket surface (3) at the lower portion, it is configured so as not to shift downward by the convex portion.

(Example 2)

FIG. 4 shows a second embodiment understood from the invention described in claim 4. As shown in the figure, the bracket weight (5A) of this embodiment is composed of a front plate (5a) and a back plate (5b), and the two plates (5a) and (5b) are mounted on the rack. It is configured to be sandwiched by screws (6) through the intermediary.

It should be noted that the ring-shaped I-It shown in the first embodiment may be combined with screw fixing. (Not shown) (Example 3)

FIG. 5 shows a third embodiment understood from the invention described in claim 5. As shown in the figure, the racket sheet (5B) of the present embodiment is one in which the front plate (5a) and the back plate (5b) are cut in one place, and the racket (1B). ), The cut portions are detachably connected by hooks (7), and the bracket (1) is sandwiched. Reference numeral 8 in the figure is a filler (or load material) made of a material different from the weight (5B).

(Example 4)

A fourth embodiment grasped from the invention described in claim 6 is shown in FIGS. 6 and 7. As shown in the figures, the bracket for the present embodiment. The light (C) is the racket (1), the rehabilitation surface rather than the throat portion extending from the grip (2) to the rack surface (3). Insert from the grip side so as to straddle the open throat part extending to both ends of (3) and the bracket surface (3). The L-in (5C) is provided detachably. The groove (5C) is formed in a part of the outer surface and the inner wall alternately so as to penetrate into the cross section, and the cross section is shaped like a bellows. In this way, it is devised to improve the elasticity by changing the thickness.

(Example 5)

A fifth embodiment grasped from the invention described in claims 7 or 8 is shown in FIG. 8 to FIG. As shown in each figure, the racket gate (5D) of the present embodiment is made of an elastic resin material or a shock absorbing material, is formed into a thick, flat ring shape, and has a racket (1) on the inner wall. ) To form an uneven part (A) conforming to the outer shape of the mounting part, and the transverse center line or longitudinal section A packing material or a load material (8) made of a material having a high specific gravity is built in or buried or semi-buried at a symmetric position with respect to the center line. Then, a uniform load is applied to the front and back sides and / or the left and right sides of the bracket (1) [or the rack surface 3] at the mounting position. Regarding the configuration of the invention described in claim 7, please refer to FIG. 5 in the third embodiment described above. The mounting location (part) of each of the above-mentioned weights () (5 A) (5 B) (5 C) (5 D) is usually the joint (4), and both sides (or both ends) of the weight ) Can be increased by increasing the muscular load by moving it to the racket surface (3) and providing a change in the muscular load. .

By installing it in the open throat section, it is possible to practice hitting the ball while wearing it, and if it is set so that it can only be mounted on the racket surface (3), this ゥ: You can swing as it is.

Here, ゥ: The L-it is provided at least in the lower half of the racket surface. 結果 The I-it is formed in a tapered shape that expands as it goes upward, so that the It is stopped, and it does not deviate from the racket even if it shakes the racket.

As means for changing the weight of the ゥ I, as described in each of the above-described embodiments, in addition to changing the shape of the イ I and the mounting position, a material having a different specific gravity may be used. Changing the width or thickness of the I-it.

Further, the weight may be one in which a filler or a load member (8) of another material having a different specific gravity is embedded, buried, or semi-buried.

Furthermore, it is possible to change the weight by providing a bag (not shown) on the イ I and removing the filler material or the load material (8) as a weight. it can. Industrial applicability

ADVANTAGE OF THE INVENTION According to this invention, by attaching a weight to a racket, swinging can be performed with a heavier racket than a normally used racket, or muscle strength can be improved by hitting a ball, thereby improving swing speed swinging dance. Training.

Also, ゥ; Since the L-shaped light is a flat elastic ring having flexibility or elasticity, the イ I-in can be inserted and mounted from the grip portion, and the mounting and dismounting operations are simple. is there.

In addition, ゥ: t-it can change the weight by changing the material, width, or thickness, and the player can freely select the weight of the player's favorite weight. By embedding the ゥ I-it as a filler with another material having a different specific gravity as a filler, or making it replaceable, a weight with a delicate weight can be obtained.

Claims

The scope of the claims

1. A rack-equipped seat, characterized in that the bracket is detachably provided at or near the joint between the grip portion and the bracket surface.

2. The joint or near the joint is the throat, the throat extending from the grip to both ends of the rack surface, the open throat, the throat or part of the open throat and the rack surface, or part of the rack surface. Claim 8 for the racket according to claim 1 characterized by the following:

3. The method according to claim 1, wherein the ゥ I is a flat ring having flexibility or elasticity, and the inner wall is formed with an uneven portion along the racket. Racket bracket.

4. The bracket according to claim 1, wherein the L-it comprises a front plate and a back plate, and the two plates are sandwiched by screws via the bracket. G.

5. The front and back plates of the seat are cut at one place, and the cut parts are connected by hooks via a bracket, and the bracket is pinched. A weight for a rack according to claim 1 characterized by the following features _:

6. The racket unit according to claim 1 or 3, wherein the unit has a change in weight by changing the material, width, or thickness. .

7. The rack way according to claim 1, 3 or 4, wherein the L-it has a filler or a load material of another material embedded therein. G.

8. In the bracket, a slot or open throat, which is the joint between the grip and the rack surface, or a slot or open throat, which is a part near the joint, is part of the racket. A racket socket detachably attached to a part to be covered or a part to cover a part of a racket surface,

The gap is a thick flat elastic ring made of an elastic resin material or a shock absorbing material, and has an uneven portion formed on the inner wall that conforms to the outer shape of the mounting portion of the racket. A packing material or a load material made of a material with a high specific gravity is built in or buried or semi-buried at the symmetrical position with respect to the transverse center line or longitudinal center line, and the rack at the mounting site or the front and back sides of the rack surface and Or a racket, characterized in that an even load is applied to the left and right sides.