JP2000014835A - Club head for golf - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a carry by providing a club head with a movable member in such a manner that this movable member is delayed from the other portions of a head and largely decreases momentum when a ball is hit and, therefore, the momentum possessed by the head is effectively transmitted to the ball. SOLUTION: The club head 10 is internally provided with the movable member 17 which is energized forward by a spring 19. The movable member 17 is moved backward by inertia when a player begins to start swinging the club. When the head 10 hits the ball, the velocity of the head 10 decreases and, therefore, the movable member 17 is moved forward in the head 10 by the inertia and the spring force of a spring. The movable member is reflected by colliding against the rear part of a face member 12. At this the, the momentum possessed by the movable member 17 is transmitted via this face member 17 to the ball. The velocity change before and after the collision of the movable member 17 is larger than the other portions of the head 10 and, therefore, the momentum is effectively transmitted to the ball and the large carry may be obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a golf club,
In particular, it relates to a club head used for a driver.

[0002]

Among golf clubs, it is the most important issue for drivers to increase the flight distance. As a means for solving this problem, conventionally, it has been considered to set desired mass, size, balance, coefficient of restitution of the face surface, elastic modulus of the shaft, and the like of the club head.

The present invention is completely different from these solutions and solves this problem by providing a dynamic structure in the club head.

[0004]

According to the present invention, a movable member movable in the front-rear direction is provided in a club head, and the movable member is biased forward by a spring.
The movable member is configured to contact the rear part of the face surface.

[0005] With this configuration, the movable member can move back and forth independently of the club head main body, so that when the club starts to swing, it moves rearward due to inertia.
When the head hits the ball, the speed of the head decreases, so that the head moves forward in the head by inertia, collides with the rear part of the face member, and thereafter reflects and moves rearward with respect to the head. At this time, the momentum of the movable member is transmitted to the ball via the face member. At this time, the velocity change before and after the collision of the movable member is larger than the other part of the head, so that the momentum is efficiently transmitted to the ball, so that the momentum of the ball becomes larger, and as a result, a longer flight distance is obtained. can get. In other words, the momentum of the entire head including the movable members is the same as that of the head of the present invention including the movable members (the mass is the same as the head of the present invention including the movable members) because the movable members are present when the ball is hit. Greater), and a greater momentum is given to the ball.

The movable member must naturally move forward and hit the rear of the face member when hitting the ball, that is, when the head body is in contact with the ball. To achieve this, not only inertia,
The spring force of the spring is also used.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS That is, the present invention relates to a space formed in a rear portion of a face member of a club head, and a movable member provided in the space so as to be movable in the front-rear direction.
When the movable member is urged forward and the club starts to swing, the movable member that has moved rearward by inertia is moved forward in cooperation with the inertial force when the face member hits the ball, A golf club head having a spring applied to a rear portion of the face member.

Various mechanisms are conceivable for enabling the movable member to move back and forth, but a mechanism that uses a pipe and in which the movable member moves is preferable because it is simple, sturdy, and strong.

That is, a club head according to the present invention is provided at a rear portion of a face member of a club head and has a pipe having a space therein, and moves in the space of the pipe in the front-rear direction along the pipe. A movable member provided so as to allow the space before and after the movable member of the space portion to communicate with each other, or to communicate these spaces with the outside, respectively, and a ventilation hole which enables high-speed movement of the movable member, Provided at the rear of the pipe body, urges the movable member forward, cooperates with the inertial force when the face member hits the ball when the movable member moved backward by inertia when starting to swing the club And a spring that moves forward and abuts against the rear part of the face member.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention.

The golf club head 10 includes an outer skin portion 11 and a face member 12 and is connected to a shaft 14 by a neck 13 to form a club.

The pipe body 15 has a cylindrical shape, is attached to a rear portion of the face member 12, and extends in a traveling direction (horizontal direction in the drawing) when the club is swung. This pipe body 15
A space 16 is formed inside, and the rear and front portions are
Both are closed.

The movable member 17 has a substantially cylindrical shape, and can move back and forth in the space 16 of the pipe body 15. At the center of the movable member 17, a vent hole 18 penetrating back and forth is formed, so that spaces in the space 16 before and after the movable member communicate with each other. For this reason,
The air passes through the ventilation holes, so that the movable member can move at high speed without any trouble. The vent can be of any configuration as long as it allows high-speed movement of the movable member. A hole is provided in the pipe body, and the space between the outer member 11 and the movable member is used. Or a structure in which the front and rear of the pipe body communicate with the outside air.

A spring 19 is provided at a rear portion in the pipe body 15 and urges the movable member 17 forward (to the right in the drawing).

The mass, the moving length, and the strength of the spring 19 of the movable member 17 are specifically determined by experiments. The larger the mass of the movable member 17 is, the larger the momentum given to the ball is. However, since the momentum transmission efficiency is maximized when the ball is equal to the ball, it is not advisable to increase the mass more than the ball mass. In addition, it also affects the feel when hitting the ball, so the preference of the player should be considered. It is preferable that the weight be approximately one third to approximately the ball mass, that is, approximately 15 to 45 grams.

The longer the moving length of the movable member 17 is, the greater the relative speed at which the movable member 17 contacts the face member becomes, and the more effective the moving length becomes. However, the longer it takes, the longer it takes to hit the face member. It does not make sense if the ball hits after leaving the face member, so it must not be too large.

The spring 19 is compressed by the movable member 17 moved rearward by inertia when the club starts to swing, and when the face member 12 hits a ball and the speed of the head is reduced, the movable member 17 is released from its elasticity. It is moved forward in cooperation with the inertia force by virtue of the force, and is applied to the rear part of the face member 12. Therefore, the optimum value of the strength of the spring is determined in relation to the mass and the moving length, and an experiment is required for setting the optimum value. The stiffer the spring, the shorter the time it takes for the moving member to hit the face member, so that the effect can be obtained with certainty. However, since the amount of compression is reduced and the moving distance is shortened, the effect of increasing the flying distance tends to be weak.

The club head 10 has the above-described structure and has the above-described functions. Total head mass 350
Grams, the mass of the movable member is 25 grams, and the travel length is 20
Trial shot was performed with millimeters. Compared with the case where the movable member was fixed with an adhesive tape, a flight distance increase of 5 to 10% was obtained.

[0019]

As described above, the club head according to the present invention has a movable member, and when the movable member hits a ball, it becomes slower than the other parts of the head and greatly reduces the momentum. The momentum of the ball can be effectively transmitted to the ball, and a longer flight distance can be realized.

[Brief description of the drawings]

FIG. 1 is a side sectional view of one embodiment of a club head according to the present invention.

[Explanation of symbols]

10 club head, 11 outer skin, 12 face member, 13 neck, 14 shaft, 15 pipe body,
16 ... space part, 17 ... movable member, 18 ... vent hole, 19 ...
Spring

[Procedure amendment]

[Submission Date] June 25, 1999 (1999.6.2
5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS That is, the present invention is directed to a space formed at the rear of a face member of a club head, and provided in this space so as to be movable in the front-rear direction .
A face member hits a ball with a movable member having a mass of one third or equivalent and a movable member which has been moved backward by inertia when the movable member is urged forward and the club starts to swing. A golf club head characterized in that the golf club head has a spring that moves forward in cooperation with an inertia force and abuts a rear portion of the face member.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

That is, a club head according to the present invention is provided at a rear portion of a face member of a club head and has a pipe having a space therein, and moves in the space of the pipe in the front-rear direction along the pipe. Provided for the ball
A movable member having a mass equal to one third or equal to the mass ;
In the space, the space before and after the movable member is communicated with each other, or these spaces and the outside are communicated with each other, and a ventilation hole that enables high-speed movement of the movable member is provided at the rear of the pipe body, Biasing the movable member forward,
When the club begins to swing, the movable member that has moved rearward due to inertia is moved forward in cooperation with the inertial force when the face member hits the ball, and a spring is applied to the rear of the face member. Configuration.

Claims (2)

[Claims] 1. A space formed in a rear portion of a face member of a club head, a movable member provided in the space so as to be movable in a front-rear direction, and a biasing of the movable member forward to swing the club. When starting, the movable member moved rearward by inertia, when the face member hits the ball, is moved forward in cooperation with the inertial force, and a spring is applied to the rear of the face member. A golf club head characterized by: 2. A pipe member provided at a rear portion of a face member of a club head and having a space therein, and a movable member provided in the space of the pipe member so as to be movable in the front-rear direction along the pipe body. The space, the space before and after the movable member is communicated with each other, or these spaces and the outside are communicated with each other, and a ventilation hole that enables high-speed movement of the movable member, and a rear portion of the pipe body are provided. When the movable member is urged forward and the club begins to swing, the movable member that has moved rearward due to inertia is moved forward in cooperation with the inertial force when the face member hits the ball, A golf club head comprising: a spring that is applied to a rear portion of a face member.