JP2001037934A - Table tennis racket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a table tennis racket for giving a spin to a table tennis ball by constituting a new grip section. SOLUTION: A grip section 3 of a racket base plate comprising a hitting ball section and the grip section 3 is constituted of a base section 31 and an end section 32 separated from the base section 31 and disposed at a fixed interval. The grip section 3 is put between a pair of upper and lower grip members 5, the end section 32 is fixed bonding to the grip members 5, the end section 32 of the base section 31 is axially supported to the upper and lower grip members 5, and a stop pin 71 provided bridging between the upper and lower members 5 is loosely inserted into a penetrated hole provided at a surface of the hitting ball section. An inner diameter of the penetrated hole is larger than an outer diameter of the stop pin 71, and the stop pin 71 can be moved between right and left sides of the penetrated hole to swing the hitting section 4 to right and left direction (a parallel direction to the hitting surface, and so forth).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf ball in which a hitting portion is oriented in a lateral direction (a direction parallel to the hitting surface, hereinafter the same) around a grip portion.
To a table tennis racket that can swing.

[0002]

2. Description of the Related Art Conventionally, table tennis rackets capable of imparting a strong spin and a strong hit ball to a table tennis ball have been developed, but the main focus has been on providing new rubber and racket members to be attached to a hitting portion. Was.

[0003]

However, there is a limit to the improvement of the racket by providing a new member. Therefore, the present inventors focused on the structure of the grip portion of the table tennis racket,
The present inventors have found that a strong spin can be imparted to a ball by forming the hitting portion in a structure that can swing right and left with respect to the grip portion, and completed the present invention.

[0004]

According to the present invention, a grip portion of a racket substrate comprising a hitting portion and a grip portion is constituted by a base portion and an end portion separated from the base portion and arranged at a predetermined interval. With a pair of upper and lower grip members, the end portion is adhesively fixed to the grip member, and the end portion side of the base is axially attached to the upper and lower grip members,
In a racket in which a through hole is provided on the hitting portion side and a stop pin provided between the upper and lower grip members is loosely inserted in the hole, the inner diameter of the through hole is made larger than the outer diameter of the stop pin. A table tennis racket (Claim 1) in which the ball can swing to the left and right ends of the through hole so that the hitting portion can be swung right and left, and the through hole on the hitting portion side of the base portion is axially attached to the end portion. A substantially arc shape centered on the part (Claim 2)
Or the racket having a circular shape (claim 3);
The racket (claim 4), wherein a stopper made of an elastic member is attached to at least one end surface of the grip base portion or the end facing surface.

[0005]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 are views for explaining a table tennis racket according to an embodiment of the present invention, wherein FIG. 1 is a plan view thereof, FIG. 2 is a vertical sectional plan view of a left half of a grip portion, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. 2, and FIG. 4 is a partially cutaway plan view of the racket substrate illustrating a swinging state of the hitting portion. In this embodiment, the upper and lower sides of the racket are upward (or front) over the plane of the racket, that is, the hitting surface.
And the bottom (or back) of the racket is the bottom (back). The left-right direction refers to a direction parallel to the hitting surface.

1 to 4, reference numeral 1 denotes a shake hand type table tennis racket, which comprises a racket substrate 2 and a grip portion 3, and the grip portion 3 is formed integrally with a hitting portion 4 as a grip base. 31 and a grip end 32 separated from the base 31. The grip part 3 includes the grip base 31 and the grip end 32.
And a pair of upper and lower grip members 5, 5
And is sandwiched between. On the other hand, the grip end 32 is adhesively fixed to the grip members 5 and 5 via the adhesive layers 9 and 9. In addition, the shapes of the end faces of the base 31 and the end 32 that face each other are various, but in the present embodiment, they are formed in an arc shape that swells toward each other when viewed from above.

The grip base 31 and the grip members 5, 5
Shaft holes 6, 6 and 62, 62 for inserting a rotating shaft 61 made of bolts or the like are drilled on the grip end side of
A grip base 31 is formed by a pair of upper and lower grip members 5,5.
The rotating shaft 61 is attached to the shaft holes 6, 6, 62, and 62 and fastened by the nut 64. Note that a rivet, a pin, or the like may be used instead of the bolt. As a result, the hitting portion 4 is pivotally supported about the rotation shaft 61. In the above, when inserting the rotating shaft 61 into the shaft holes 62, 62, the screw head 65 is used.
It is preferable to use washers 63, 63 between the nut 64 and the grip members 5, 5. These washers are provided with a screw head 65 and a nut 64 and grip members 5 and 5.
It is used for reducing friction between and a synthetic resin having a low friction coefficient such as polyterephthalate resin,
Those made of mirror-finished metal or the like are preferable. The outer diameter of the washers 63, 63 is larger than that of the shaft hole 62 in order to prevent the screw head 65 and the nut 64 from sinking into the shaft holes 62, 62.

A substantially circular arc-shaped hole 7 centering on the rotation shaft 61 is formed in the hitting portion 4 side of the grip base 31. Through holes 72, 72 are drilled at positions corresponding to the center of the arc-shaped holes 7 on the hitting portion side of the grip members 5, 5, and stop holes 71 made of bolts are provided in the through holes 72, 72 and the arc-shaped holes 7. The stop pin 7 is inserted
1 is fastened by a nut 74. It is preferable to use washers 73 and 73 between the screw head 75 and the nut 74 and the grip members 5 and 5, and the washers 73 reduce friction between the screw head 75 and the nut 74 and the grip members 5 and 5. And the material may be the same as that of the washer 63. The stop pin 71 is a rotary shaft 61
The racket hitting part 4 is swingable to the right and left. The outer diameter of the washers 73, 73 is made larger than the diameter of the shaft hole 72 in order to prevent the screw head 75 and the nut 74 from sinking into the shaft holes 72, 72.

In order to reduce the friction between the upper and lower surfaces of the grip base 31 and the inner surfaces of the upper and lower grip members 5, 5, either one of the opposing surfaces of the base 31 and the grip member 5 may be entirely or partially provided. It is desirable to attach a synthetic resin sheet, a synthetic resin piece, a mirror-finished metal sheet, or the like having a low coefficient of friction. The material of the sheet may be the same as that of the washer. Alternatively, the rotating shaft 61 and the stop pin 71
When installing the gripper, the washers 63, 63 and 73, 73 may be used between the grip substrate 31 and the grip member 5.

[0010] Opposite grip base 31 and end 32
A pair of left and right stoppers 8, 8 made of an elastic member is adhesively fixed to one of the end surfaces. As the stopper 8, an elastic material such as polyurethane resin, foamed polyurethane resin, synthetic rubber, or natural rubber can be used. The elastic member 8 regulates free swinging of the hitting portion 4 to the left and right, reduces the impact on the wrist when the stop pin comes into contact with the stoppers 8, 8, and contributes to maintaining the racket control. I have. Furthermore, the repulsive force of the elasticity of the member 8 increases the swinging speed of the hitting portion 4 in the left-right direction.

FIG. 5 is a partially cutaway cross-sectional view of a table tennis racket 11 showing another embodiment of the present invention. In the above embodiment, instead of the arc-shaped hole 7, a circular through hole 77 having an outer diameter several mm to several tens mm larger than the outer diameter of the stop pin 71 is formed. It can swing left and right around 61. A stopper 8 made of an elastic member is adhered and fixed to the entire end surface of the end portion 32 of the grip, and a pair of protrusions 10 and 10 are provided at both ends of the end surface of the grip base 31 which is the opposing surface of the end portion 32. It is adhered or is formed so as to project integrally with the base 31.

In the embodiments shown in FIGS. 1 to 5, shake rack type table tennis rackets 1 and 11 are taken as an example, but the same applies to a pen holder type racket.

[0013]

The table tennis racket 1 of the present invention cuts an opponent's ball from above to below (in the present description, it is different from the vertical direction of the racket itself) (moving in the direction parallel to the ball striking surface). The operation of the invention will be described. In FIG. 4, the position A indicates the racket position when not in use. Also,
In FIG. 4, the arc-shaped holes 7 at the positions B and C are formed by 7b and 7c.
Similarly, the stoppers 8 are indicated by 8b and 8c. First, the arm is swung upward (in the direction of the position C in FIG. 4), the wrist is turned back (bent upward), and the force is momentarily held upward. At that time, due to the weight of the racket, the hitting portion 4 is delayed from starting upward, swings about the rotation shaft 61 of the grip base 31, and the grip end portion 32 moves downward (in the opposite direction to the direction in which the wrist returns). The elastic stopper 8b (position B in FIG. 4) is abutted and pressed. Next, when the movement of the arm upward (in the direction of the position C in FIG. 4) and the return of the wrist are stopped, the ball is hit at a high speed by the elastic repulsive force of the stopper 8b and the inertial force due to the swinging up of the arm and the return speed of the wrist. And starts swinging upward (in the direction of the position C in FIG. 4).
Is strongly pressed against the upper (in the position B in FIG. 4) elastic stopper 8c in the opposite direction. At this moment, when the arm is swung down and the wrist is snapped down to cut the ball, in addition to the speed of the arm swung down and the wrist snap, the ball is cut at the above position (position C in FIG. 4). The speed by the elastic repulsive force of the stopper 8c is applied, and the cutting speed of the racket 1 is remarkably accelerated, so that a strong spin can be applied to the ball. As described above, since the cutting speed can be increased by using the table tennis racket of the present invention, a stronger spin can be imparted to the ball as compared with a normal table tennis racket.

The table tennis racket 11 of the present invention shown in FIG.
The action of 0 and 10 regulates the free swinging of the hitting portion 4 to the left and right, reduces the impact on the wrist when the stop pin 71 comes into contact with the stoppers 8 and 8, and maintains the racket control. Has contributed. Furthermore, the repulsive force of the elasticity of the member 8 increases the swinging speed of the hitting portion 4 in the left-right direction.

[0015]

According to the table tennis racket of the present invention, since the grip portion of the substrate is separated back and forth, and the hitting portion can swing right and left, a strong spin can be imparted to the table tennis ball. Furthermore, since a stopper made of a pair of left and right elastic members is attached to at least one end surface of the base portion or the end portion of the grip portion of the board, the elasticity of the stopper absorbs the impact at the time of swinging and reduces the burden on the wrist. Can be. Further, the swing speed of the hitting portion can be further accelerated by the elastic repulsive force of the stopper, and an extremely strong spin can be applied to the table tennis ball.

[Brief description of the drawings]

FIG. 1 is a plan view of a table tennis racket according to an embodiment of the present invention.

FIG. 2 is a plan view of a left half section of a grip portion of the racket.

FIG. 3 is a vertical sectional view taken along line AA of FIG. 3;

FIG. 4 is a partially omitted plan view showing a left and right swing state of a grip portion of the racket substrate.

FIG. 5 is a partially omitted transverse cross-sectional view of a grip portion showing another embodiment of the racket substrate of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 11 Table tennis racket 2 Substrate 3 Grip part 31 Base part 32 End part 4 Hit part 5 Grip member 6 Shaft hole 61 Rotation shaft 62, 72 Nut 7 Arc hole 71 Stop pin 77 Circular hole 8 Stopper 10 Projection

Claims (4)

[Claims] 1. A rack portion of a racket substrate comprising a hitting portion and a grip portion, comprising a base portion and an end portion separated from the base portion and arranged at a predetermined interval, and the grip portion is sandwiched between a pair of upper and lower grip members. The end portion was adhesively fixed to a grip member, and the end portion of the base portion was axially attached to an upper and lower grip member, and a through hole was provided on the hitting portion side, and was provided between the upper and lower grip members in the hole. In a racket in which a stop pin is loosely inserted, the inner diameter of the through-hole is made larger than the outer diameter of the stop pin so that the stop pin can swing to the left and right ends of the through-hole, and the hitting portion is moved in the left-right direction (parallel to the hitting surface). A racket for table tennis that can be swung in any direction. 2. The racket according to claim 1, wherein the through hole on the side of the ball hitting portion of the base has a substantially arc shape centered on the shaft attachment portion on the end side. 3. The through hole of the base portion on the side of the hitting portion having a circular shape centered on the shaft attachment portion on the end side.
Racket described. 4. The racket for table tennis according to claim 1, wherein a stopper made of an elastic member is attached to at least one end surface of the base portion or the end portion of the grip portion of the racket substrate.