JPS62181995A - Racket - 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 The present invention relates to a racket, and more particularly to a racket with a gut used for playing tennis, squash, badminton, etc.

The common features of this type of racket are that it has 6 double-sided rackets to hit the ball hard, and that it must have a certain degree of elasticity and be round the eaves. Graphite, graphite/glass 7-aiba, or racket frames made entirely of metal, are popular because of the strength of the material.However, the impact force that occurs when used incorrectly or when the ball is hit hard outside the center of the racket during normal use. Graphite material is relatively susceptible to damage.Furthermore, in such conditions, the vibrations caused by the impact of the racket are often transmitted from the frame to the user's arm, causing damage over time. It can also cause arm injuries.

It is an object of the present invention to provide a racket with means for absorbing the force due to impact.

Therefore, a racket using the gut of the present invention has a head supported at a distant position on both arms of a yoke, a gap formed in the head between both arms, and a distortion of the head in the direction that pinches this gap. tQ is constructed with an insert of an elastic member placed in the cavity to absorb 1.

Preferably, the opposite ends of the head defining the air gap are
: is fitted with an insert to absorb the distortion of the head that causes misalignment of the end.

Preferably, the opposing ends are fitted with the insert by engaging a racket formed on the insert. The socket can have various shapes, such as a circular arc shape or a truncated 11-shape shape. According to one embodiment, the socket can be formed by an insert that partially or completely overlaps the side of the head near the opposite end.

The insert can be held completely in its oriented position by the forces exerted on the opposing ends when the racquet is strung, or by other suitable means. For example, a bottom plate may be placed near the outer circumferential surface of the head to hold the insert in position. The bottom plate can be separate or integrated with the insert. Additionally, the bottom plate could be held in position by forming two or more holes in the bottom plate and passing gutters through the holes.

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

The embodiment shown in the drawings is an application of the racket of the present invention to a squash racket, but as will be seen from the following explanation, it can easily be applied to other rackets with a gusset, such as tennis or badminton rackets. Applicable to

Referring to FIGS. ptS1 to 3, the frame of the racket 1 includes a head 2 that is integrally formed on both arms 3 and 4 of the yoke and can be supported, a shaft 5 that is integrally formed with the yoke, and a handle at the end. Alternatively, it may be composed of a handle (not shown). The racket frame can be made entirely of graphite, graphite and other fibers, or metal.

According to the invention, the head 2, spaced equidistantly from the arms 3, 4 of the yoke, has an air gap 7, which air gap 7, for example...
It can be made by cutting one part of I-Do 2. void 7
are defined by opposite ends 8,9. opposing ends 8;
9 slopes on both sides 8,! l, and the fourth to seventh
As shown in detail in the figure, inserts 10 that are in close contact with these slopes are fitted between the gaps 7. Therefore, it is possible to absorb the distortion of the blade 2 in the direction in which the gap 7 is sandwiched, or the distortion caused by the deviation of the opposing ends 8 and 9 of the head 2.

The fitting is achieved by the slopes 11 of the opposing RA portions which are closely fitted into the truncated V-shaped socket 13. The strain causing the displacement is therefore recovered by the elasticity of the insert 10.

The plane of the body 12 of the insert 10 is approximately hourglass-shaped and has a transverse recess 13 with a narrow waist 14 and two sockets in the shape of a movable or truncated V. The absorption of strains causing misalignment is possible by fitting the opposite ends 8, 9 with the insert 10. The lower part of the body 12 terminates via a tapered surface 15 into a narrow base 16 . A pair of hollow members 17 having an rt through hole 1B have a base,
1 ('+h') and extends upward and penetrates into each racket 13.

The III-shaped recess 19 at the bottom of the base 111s15 communicates with the 1\ through hole 18 of the hollow member 17.

As can be seen from FIGS. 1 and 2, gut holes 20 are formed at both ends 8, 9 of the head 2 near the 'JP gap 7. Since the insert 10 is inserted into the gap 7 from the outside of the spatula 2, the hollow member 17 is inserted into the seat hole 20. The slopes 11 of the opposite ends 8, 9 of the head 2 are
It fits snugly within the truncated V-shaped socket of the insert 10. When the racket frame is stretched with the gut 21 or other material, the gut goes down the through hole 18 of one hollow member 17, passes through the four parts of the base 1 (1), and passes through the eleven holes (3) of the other hollow member 17. By pulling firmly on the insert 21, the insert 10 is firmly held in the gap 7.The important thing to note here is the recess 1 of the insert 10;
(And the shapes of the ends 8 and 9 of the head 2 are compatible with each other. Therefore, the impact force absorption in the direction of narrowing the gap 7 is achieved by the elasticity of the waist part 14, and the other end parts 8 and 9
The force in the direction of shifting is elastically regulated by the body 12 of the insert 10.

Figures 8 to 11 refer to Figures 1 to 3 (
The second part of the insert used in the described racket
See the example below. The IP surface of the main body 32 of the inserter No. 12 () of the f52 embodiment has a substantially T-1 shape. 1
1 part 32 is the waist part: (2 sockets 33 separated by 4
stipulates. The lower part of the main body 31 extends into the llll11 section 32 and reaches a floor section 35 that is integrally formed with the main body 31. A through hole 36 is formed in the floor part 35 and receives a pair of hollow members 37 extending from the bottom plate 3+3 in the -L direction.

The hollow member 37 has a through hole 39, and the lower portion 40 of the bottom plate 3H communicates with the open end of the through hole.

In this embodiment of the insert, the opposing ends 8. ! ] has no slope, and the corresponding part is flat. The fitting between the opposing ends 8 and 9 and the insert 30 is achieved by fitting the l1111 portion 32 of the insert 30 to the opposing end 8.
, 9 on the sides of the head 2, and fit snugly into the socket 3: ().

When in use, the inserter) :((The main body of 1 is inserted from the outside of the head 2 into the empty llll!t7. The through hole 36 is
The hollow member 37 of the bottom plate 38 matches the seat hole 20, and the hollow member 37 of the bottom plate 38
The through hole 36 and the bottom hole 20 until the hole 8 comes into contact with the floor 35.
inserted into. After this, the racket is strung as described with respect to the insert in the first embodiment. As in the first embodiment, the impact force absorption in the direction of narrowing the gap 7 is achieved by the elasticity of the waist. In this embodiment, the force in the direction that causes the opposing ends 8 and 9 to shift is
0 side part 32.

FIG. The same reference numbers have been used for equivalent parts. In the configuration shown in FIG. 12, the recess or socket 13 has an arcuate shape instead of a truncated V'f: shape. In the insert of FIG. 12, the opposite end fi 58.9 of the head 2 is correspondingly arcuately shaped to snugly engage the socket 13. The fit and shock absorbing method of the insert is the same as that described in the example of FIG. 7.A particularly suitable material for the elastic insert is Dupon 5T-
It is a plastic material known as 801.

It has been found that the socket of the present invention successfully absorbs nearly all of the harmful frame swings inherent in tough rackets. If the yoke were placed on both arms, the vibrations caused by the impact force would be concentrated in this area, and most of it would be absorbed by the insert. What is commonly referred to as the sliding of the gut or the "feel" of the racket is transmitted to the user without much attenuation.In contrast to the vibration of the gut, which has traditionally attracted attention, Frame swing! IIJJ has not been recognized as an obvious cause of arm and shoulder injuries for users.Furthermore, even when the racket hits a hard surface, the racket with the insert of the present invention is less likely to be damaged than the conventional one. It has been shown that it is more robust than the conventional one.

[Brief explanation of drawings]

Fig. 1 is a side view of a racket using the gutt of the present invention, Fig. 2 is a partial sectional view taken along line 2-2 in the r:rS1 drawing, and Fig. 3 is a side view taken along line 3-3 in Fig. 1. 4 is a side view of the vibration absorbing insert forming part of the racket shown in FIG. 1; FIG. 5 is an end view of the insert 4ti4;
Fig. 6 shows a flat 1f11 view of the insert in Fig. 4, Fig. 7 shows a sectional view taken along 7-74fA of the fjsG drawing, and Fig. 23 shows a second embodiment of the vibration absorbing insert similar to Fig. 4. Side view, Figure 9 is an end view of the insert of Figure 8, Figure 10.
The figure is a φ side view of the insert in Figure 8, Figure 11 is a sectional view taken along line 1l-1L in Figure 10, and Figure 12 is a Pt
Figure 54 is a side view of a second embodiment of a vibration absorbing insert similar to Figures 54 to 8; 1... Racket 2... Spatula l' 3.4...
Yoke arm 8! 3...edge? nS 10.30
-4> Sir) 11... Slope 12, 31... Main body 1
3.33...Socket (recess) +4.34...Waist part 16...Base 17.37...
・Hollow member 18.39...Through hole 19.40...
Recess 35...Floor W 3B...Bottom plate! Milk β /9 F/6', 7

Claims (9)

[Claims] (1) The head is supported at a separate position on both arms of the yoke, and a gap is formed in the head between the two arms. A racket that uses a string consisting of a placed elastic member insert. (2) A racket according to claim 1, wherein opposing ends of the head defining the gap are fitted with the insert to absorb distortion of the head that causes displacement of the ends. (3) The racket according to claim 2, wherein the opposing ends fit into the insert by coming into close contact with a socket formed in the insert. (4) The racket according to claim 3, wherein the opposing end portions and the socket are formed in an arc shape. (5) The racket of claim 3, wherein the opposing ends have slopes for engagement with truncated V-shaped sockets of the insert. (6) A racket according to claim 3, wherein the socket is formed by an insert that overlaps a side of the head near the opposite end. (7) The racket according to any one of claims 1 to 6, further comprising a bottom plate placed near the outer peripheral surface of the head to hold the insert in a fixed position. (8) The racket according to claim 7, wherein the bottom plate has two or more holes, and the bottom plate is held at a fixed position by passing strings through the holes. (9) The racket according to claim 7 or 8, wherein the bottom plate is integrally formed with the insert.