JPH02213367A - Matching-racket having vibration-damping assembly - Google Patents

Abstract

PURPOSE: To give a vibration absorbing property to a racket made of a metal or a composite material by installing a vibration absorbing assembly in a throat connecting head and shaft. CONSTITUTION: A racket 10 made of a metal or a composite material is provided with head 11, shaft 12 and handle 13. A throat 14 connects the head and the shaft, and a single vibration absorbing assembly 20 is mounted, for instance, on the racket longitudinal axial line of the throat. A hole is provided, for instance, in the throat, in which a metal rod 21 with heads 22 and 23 is inserted, fixed with two deformable bushes 30 and 31, for instance, of natural rubber, and allowed to move in the throat in the AA' direction according to the vibration given on the racket.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a competition racket with a vibration damping assembly.

(Problems to be Solved by the Invention) Racquets made of metal or composite materials lack the vibration damping properties inherent in wooden rackets. Therefore, additional damping means are desirable in the case of metal or composite racquets.

(Means for Solving the Problems) Therefore, the present invention provides a head for stringing,
A competition racket is provided that includes a shaft, a handle, and a throat portion connecting the head and shaft to each other, and one or more vibration damping assemblies are provided within the throat portion.

Preferably, a single vibration damping assembly is provided at or adjacent the throat of the racquet, and suitably on the longitudinal axis of the racquet.

Additionally, two vibration damping assemblies may be provided at the throat, and the vibration damping assemblies may be positioned symmetrically with respect to the longitudinal axis of the racquet.

According to the invention, each vibration damping assembly includes a vibration member;
1 or more elastically deformable mounting members, which mounting members support the vibrating member to the racket so that the vibrating member can move freely and elastically in the direction of the applied vibrations. Attach against.

Preferably, the direction of vibration is approximately perpendicular to the plane of the strings of the racket.

Preferably, the vibrating member is made of a high-density material such as metal;
Suitably it consists of a metal rod having a mass of 5 to 15 g.

The elastically deformable attachment member can be formed from natural rubber, synthetic rubber or a rubber-like material. A suitable material is the cytoplasmic material sold under the trademark 5ORBOTHANE.

(Example) As an illustration of the present invention, an example thereof will be described below with reference to the drawings. (In the drawings, the same parts are given the same reference numerals.) The racket 10 includes a paddle 11 for strings, a shaft 12, and a handle 13.

A throat portion 14 joins the head and shaft together. A single vibration damping assembly 20 is mounted on the throat portion 14 on the longitudinal axis of the racquet.

Referring to FIG. 2, the throat portion 14 has a metal rod 2.
A hole is provided for accommodating a vibrating member consisting of 1. Also, the rod has a
s22 and 23 are provided. The mounting parts are 2
It consists of two deformable bushings 30 and 31 which allow the rod to move within the throat in response to vibrations imparted to the racquet when the racquet is in use. Movement occurs in the direction indicated by arrow AA'.

The vibration damping assembly 20 of the present invention is mounted on one of two identical metal frame tennis rackets.

The weight of the metal rod 21 is 7 g, and the deformable bushings 30 and 31 are made of natural rubber.

The rackets were subjected to vibration characteristics tests, and their vibration damping characteristics were as follows.

Racket without vibration damping assembly: 19 Racket with vibration damping assembly: 23 The value for vibration damping is calculated using the following formula.

Vibration damping □1og* (vibration damping) XIO" The higher the value, the better the damping was obtained.

The vibration characteristics described above can be easily measured by those skilled in the art.

[Brief explanation of the drawing]

FIG. 1 is a schematic view of a racket incorporating the vibration damping assembly of the present invention, and FIG. 2 is a cross-sectional view taken along the line 1--2 in FIG. (Explanation of main symbols) IO: racket, 11: head, 12: shaft, 13: handle, 14: throat section, 20: vibration damping assembly, 21.22, 23: vibration member, 30.31: mounting member. (4 other people)

Claims (1)

[Claims] 1. A competition racket comprising a head for strings, a shaft, a handle, and a throat portion connecting the head and shaft to each other, wherein the throat portion (14) is one or more of the following: Vibration damping assembly (20
) A competition racket characterized by having: 2. The competition racket according to claim 1, characterized in that the throat portion is provided on or adjacent to the antinode of vibration of the racket, for example on the longitudinal axis of the racket (10). 3. According to claim 1, two vibration damping assemblies (20).
are provided in the throat portion (14), and the vibration damping assemblies (20) are arranged symmetrically with respect to the longitudinal axis of the racket (10). 4. According to claim 1, 2 or 3, each vibration damping assembly (20) comprises a vibration member (21, 22, 23) and one or more elastically deformable attachment members (30, 31), The mounting members (30, 31) are configured to absorb vibrations such that the vibration members (21, 22, 23) can move freely and elastically in the direction of the applied vibrations (A, A'). A competition racket, characterized in that a member is attached to the racket. 5. The competition racket according to claim 4, wherein the direction of vibration (A, A') is substantially perpendicular to the throttling plane of the racket. 6. In claim 4 or 5, the vibration member (21, 2
2, 23) is a competition racket made of a high-density material such as a metal rod and having a mass of 5 to 15 g. 7. A competition racket according to claim 4, 5 or 6, characterized in that the elastically deformable attachment members (30, 31) are made of rubber such as cellular material, synthetic rubber or rubber-like material.