CN205042075U - Standardize auxiliary device that tennis service toss was used - Google Patents

Abstract

An auxiliary device for standard tennis ball throwing is characterized in that: the side of the round tube is provided with a first fastening screw, the lower end of which is fixedly connected to the upper middle of the base, and the lower end of the telescopic round tube is inserted into the upper port of the round tube and fixed on the side of the upper end. The flat groove is welded and connected, and a second fastening screw is provided on the side of the flat groove. The screw shaft is hinged to the right end of the cross bar, and the left end of the cross bar is fixedly connected to the circle. The center of the circular pad ring target is aligned with the center of the circle and placed on the ground. The beneficial effect of using the device is: adjust the telescopic tube to determine the required height of the circle, which is beneficial for the practitioner to determine the height to which the ball is suitable; the practitioner holds the tennis ball lightly and aligns it with the center of the circle to practice throwing the ball up and down and close to the center of the circle pad ring target , indicating that the toss is stable and within the effective hitting range. On the contrary, if the toss is not stable and falls beyond the circle and falls outside the ring target, it is not in the effective hitting range; the auxiliary reference function of the circle and the ring target is good for the practice standard throwing Power stereotypes have certain practical significance. <!-- 2 -->

Description

Specification for assistive devices for tennis serve and toss

technical field

The utility model belongs to the field of sports equipment, in particular to an auxiliary device for standardizing tennis ball throwing.

Background technique

There are flat serve, topspin serve and side spin serve in tennis. The current tennis serving technique requires that "thumb, index finger and middle finger of the throwing hand lightly hold the ball with the palm facing upwards. Make a large arc swing above the head. When the body rotates, bends the knees, and stretches the shoulders, the ball holder gently lifts up in front of the left foot until it reaches the top of the head. The throwing action should be coordinated and stable. Send it to the highest point and then leave your fingers, and take advantage of the momentum to go into the air.” When beginner tennis players complete the above actions, there are problems such as uncoordinated, unstable throwing movements, throwing the ball beyond the effective hitting range, and unreasonable throwing height. Lacking a kind of auxiliary device that solves the above problem has practical significance now.

Utility model content

In order to better solve the problems existing in the above-mentioned background technology, the purpose of this utility model is to provide an auxiliary device for standard tennis serve and throw. The technical solution adopted by it is composed of the following components: The lower end of a fastening screw is fixedly connected to the upper middle part of the base. The lower end of the telescopic round tube is inserted into the upper port of the round tube and welded to the flat groove on the side of the upper end. A second fastening screw is arranged on the side of the flat groove. The screw shaft The right end of the cross bar is hinged, the left end of the cross bar is fixedly connected with a circle, and the center of the circular pad ring target is aligned with the center of the circle and placed on the ground.

The beneficial effect of using the device is: adjust the telescopic tube to determine the required height of the circle, which is beneficial for the practitioner to determine the height to which the ball is suitable; the practitioner holds the tennis ball lightly and aligns it with the center of the circle to practice throwing the ball up and down and close to the center of the circle pad ring target , indicating that the toss is stable and within the effective hitting range. On the contrary, if the toss is not stable and falls beyond the circle and falls outside the ring target, it is not in the effective hitting range; the auxiliary reference function of the circle and the ring target is good for the practice standard throwing Power stereotypes have certain practical significance.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Fig. 1 is a schematic diagram of the three-dimensional front view of the auxiliary device used to standardize the tennis serve and toss;

Fig. 2 is a schematic diagram of the folded circle in Fig. 1 .

detailed description

With reference to the accompanying drawings, the side of the round pipe 8 is provided with a first fastening screw 9 whose lower end is fixedly connected to the upper middle part of the base 10, and the lower end of the telescopic round pipe 7 is inserted into the upper port of the round pipe and welded to the flat groove 5 on the side of the upper end thereof. The side of the flat groove is provided with a second fastening screw 6, the screw shaft 4 is hinged to the right end of the crossbar 3, the left end of the crossbar is fixedly connected to the circle 2, and the center of the circle pad ring target 1 is aligned with the center of the circle and placed on the ground. When using the device, open the cross bar and fasten it with the second fastening screw; adjust the telescopic tube to determine the required height of the circle, and fasten it with the first fastening screw; after using the device, loosen Opening the second fastening screw and folding the circle is convenient for receiving and storing the device.

Claims (1)

1. An auxiliary device for standard tennis ball throwing, characterized in that: the side of the round tube is provided with a first fastening screw whose lower end is fixedly connected to the upper middle part of the base, the lower end of the telescopic round tube is inserted into the upper port of the round tube and The side of the upper end is welded and connected to the flat groove, and a second fastening screw is arranged on the side of the flat groove, the screw shaft is hinged to the right end of the cross bar, the left end of the cross bar is fixedly connected to the circle, and the center of the circular pad ring target is aligned with the center of the circle. on the ground.