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String clamping device

String clamping device description/claims

The present invention relates to a clamping device for setting proper tensioning to strings of a sport racket and the strings are not bent during tensioning process.

Conventional strings for sport rackets are arranged in altitude and longitude directions in the racket head and the strings are pulled to have proper tension such that when the racket hits the ball, the ball flies powerfully and quickly. The strings are pulled by string clamping device while the racket head is securely positioned. The string clamping device is located lower than the racket head so that the racket head does not hit the string clamping device when the racket head rotates in order to string the strings in different directions. However, the lower positioned string clamping device is located lower than the string holes in the racket head pulls the string an angle so that the string is bent at the periphery of the opening of the string hole in the outer side of the racket head. The string might be damaged at the bending point and the periphery of the string holes at the bending point of the string generates a force which may affect the value of tension of the strings.

The present invention intends to provide a string clamping device which pulls the strings straight without any bending points so that the tension of the string is precisely set.

The present invention relates to a string clamping device that comprises a base and two first sidewalls are located on two sides of the base. A movable unit is located between the two first sidewalls and composed of two second sidewalls. A pair of clamping members are pivotably connected between the two second sidewalls to which a first and second bearings are connected. A guide member is connected to an end of the movable unit. Each of the two first sidewalls has a first slot and a second slot defined in an inside thereof, one end of each of the first slots located close to the guide member is higher than the other end. The first bearings are movably received in the first slots and the second bearings are movably received in the second slots. The movable unit and the clamping members are moved along the first slots when pulling the strings.

The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.

FIG. 1 is a perspective view to show the string clamping device of the present invention;

FIG. 2 is an exploded view to show the string clamping device of the present invention;

FIG. 3 is a side view to show that the movable unit is not pivoted along the first slots;

FIG. 4 is a side view to show that the movable unit is pivoted along the first slots;

FIG. 5 is a partial cross sectional view to show the shock absorbing unit, and

FIG. 6 is a partial cross sectional view to show that the positioning pin extends through the first and second sidewalls of the string clamping device of the present invention.

Referring to FIGS. 1 to 4, the string clamping device 10 of the present invention comprises a base 11 and two first sidewalls 12 are located on two sides of the base 11. A movable unit 20 is located between the two first sidewalls 12 and composed of two second sidewalls. A pair of clamping members 30 are pivotably connected between the two second sidewalls 21 and a guide member 40 is connected to an end of the movable unit 20. The clamping members 30 clamp a string as shown in FIG. 4 when pulling the string.

• Provisional Patent
• Utility Patent

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