JPS5922533B2 - tennis racket - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tennis racket, in which the ginkgo portion deforms to allow the deformation of the frame, bending the frame in a firm direction, increasing the hitting force and improving the directionality of the ball. This is how it was done.

In conventional tennis rackets, the frame and shaft are designed to have flexure and rigidity in the direction of ball hitting, but the flexure of the frame in the gut direction (plane direction) of the racket face is completely ignored, and the ginkgo part simply bends in the gut direction. It is fixed to the frame as part of the tensioning member, so that the frame hardly bends in the direction of the tension.

This invention flexes the frame in the direction of the gut, lengthens the contact time between the ball and the gut when hitting the ball, increases the batting force, increases the flight speed of the ball, and ensures the directionality of the ball. The purpose of this tennis racket is to provide a tennis racket that allows you to hit a ball that changes in a variety of ways, such as spin and drive. Therefore, this invention divides the ginkgo part into left-right symmetrical parts, and these divided bodies rotate the rotation axis on the longitudinal center axis of the frame. The above object is achieved by employing a structure in which the parts are connected through each other and fixed to the frame.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. Reference numeral 1 denotes a tennis racket, and a ginkgo part 3 is fixed to a frame 2.

The ginkgo part 3 is a pair of divided bodies 3 that are symmetrically divided.
The divided bodies 3a and 3b are integrally fixed by a rotation shaft 4 located on the longitudinal center axis C-C of the frame 2, with their respective free ends overlapping each other, The other end of each divided body 3a, 3b is fixed to the frame 2 with screws 5.

Therefore, the divided bodies 3a and 3b rotate about the rotation axis 4, and the ginkgo portion 3 is deformed.

Note that 6 indicates Guttu.

Next, to explain the action of the ginkgo part in the above configuration, when a ball is hit, the frame 2 exhibits a movement of deformation in the direction of the gut due to the force applied to the string of the gut 6. is rotated and deformed around the rotation axis 4, so the movement of the frame is not restricted,
Therefore, the frame is transformed from the state shown by the two-dot chain line in FIG. 2 to the state shown by the solid line.

The arrows in FIG. 2 indicate the direction of rotational deformation of the ginkgo portion 30 divided body 3a, and the divided body 3a also follows the movement of the frame 2 from the state shown by the two-dot chain line in FIG. 2 to the state shown by the solid line. It deforms (the same applies to the divided body 3b).

Then, when the ball leaves the gut surface, the frame 2 returns to its original state (the state shown by the dashed line in Figure 2), and along with this, the ginkgo portion 3 also returns to its original state.

As described above, according to the present invention, the ginkgo portion does not restrict the movement of the frame in the gut direction, but moves to follow the deformation of the frame, so the entire frame can receive the impact when the ball is hit. , the degree of damage to the guts and the frame is reduced, and the durability of the tennis racket can be improved.

In addition, the deflection of the frame lengthens the contact time between the ball and the gut, making it easier to spin and drive the ball (allowing you to hit a taller ball, and making it easier to control the direction of the ball). Since the energy from the deflection of the frame is used, the ball speed increases, allowing you to hit a heavy and fast ball.

Furthermore, since the impact when hitting the ball is reduced, the impact that travels down the shaft to the grip and then to the player's hands is weakened, which prevents damage to the player's wrists, elbows, etc. and helps prevent player fatigue. You can get a tennis racket with

[Brief explanation of drawings]

FIG. 1 is a plan view of one embodiment of the tennis racket according to the present invention, and FIG. 2 is an explanatory diagram showing the working state of the frame and the fin. 1...Tennis racket, 2...Frame, total...Ginkgo part, 3a, 3b...
...Divided body, 4...Rotation axis, 6...Gut.

Claims (1)

[Claims] 1. A tennis racket in which the ginkgo part is composed of a pair of divided bodies, the free ends of each divided body are overlapped and pivoted to each other so as to be rotatable, and the other end of each divided body is fixed to a frame. .