KR20020091713A - Apparatus for throwing tennis ball - Google Patents

Abstract

PURPOSE: An apparatus for throwing a tennis ball is provided to perform tennis training in a small space and make tennis trainees proficient. CONSTITUTION: The apparatus for throwing a tennis ball includes a collecting box(10) curved and formed in an opened shape, whose front, back and upper sides are opened; a throwing pad(20) curved in an arc shape inside the collecting box, the throwing pad capable of controlling the height of the apex portion thereof in up and down directions; a rotatable throwing member(30) coupled and fixed to a driving motor(31) mounted in the upper portion of the collecting box to be controlled and operated by an external power source, the throwing member rotating intermittently along the throwing pad.

Description

Apparatus for Throwing Tennis Ball}

The present invention is a throwing structure that pushes a tennis ball, and the throwing distance of the tennis ball can be shortened and the throwing angle can be adjusted freely, thus allowing the tennis practice to be performed in a narrow space while improving the tennis player's ability. Relates to a device.

Previously, a tennis ball thrower that automatically throws a tennis ball to practice tennis has been provided. Korean Utility Model Publication No. 96-7138 (March 13, 1996) has a guide groove on a pedestal. The height and direction adjuster is fixedly installed by the support shaft, and a lock arm operated as a driving motor is installed on the pedestal and attached to the bottom of the control panel. The guide groove of the control unit is supported by the support shaft by the support shaft. Install a ball storage box having a ball separating motor on the upper side of the housing, and at the bottom of the ball storage box is provided with a ball feed unit which is constantly swinging while the latch is controlled by the solenoid, At the bottom of the latch, a ball guide is formed, while the upper and lower pitching rollers driven by a separate variable speed drive motor are placed inside the ball. The tennis ball automatic throwing machine "which is provided and provided in the endurance vicinity is disclosed by the first application. The tennis ball automatic thrower is rotated to throw the tennis ball supplied separately from the ball storage box through the ball supply box in the interior of the housing which is installed to be variablely adjusted as the height and direction adjuster. By installing, it is true that it has the advantage of being able to practice by arbitrarily selecting the pitch, the height and the direction of the tennis ball.

However, since the throwing distance of the tennis ball is increased by the rotational force of the upper and lower pitching rollers, the conventional tennis ball automatic throwing machine requires a large space such as a tennis court or a playground, so it is subject to the place. Second, the height and direction of the hull as a control unit had to adjust the height of the limited to a limited width, accompanied by the problem of losing the practice opportunity to hit the tennis ball thrown as a variety of throwing angles, etc. .

On the other hand, recently, a compressed air type tennis ball automatic thrower has been developed and provided with a supply box for supplying individual tennis balls, and a throwing tube installed in communication with the supply box so as to load compressed air. When the compressed air type tennis ball automatic thrower is thrown into the throwing tube from the supply box, the tennis ball is thrown by the compressed air loaded in the throwing tube, so that the tennis practice hits the thrown tennis ball. It was possible to do.

However, such a compressed-air tennis ball automatic throwing machine is configured to throw the tennis ball as air compression force, so that the throwing distance is long and requires a large place such as a tennis court or a playground, In order for the tennis ball to be thrown by air compression force, only the tennis ball having a diameter exactly matched to the inner diameter of the throwing tube is selected and used, which causes an inconvenience to the user.

The present invention is a throwing structure that pushes a tennis ball, so that the throwing distance is shortened and the throwing angle can be adjusted freely, so that the throwing distance of the first tennis ball can be practiced without being bound to the place. Second, the object of the present invention is to provide a tennis ball throwing device that improves the ability of tennis practicers by granting a practice opportunity to hit a tennis ball thrown at various throwing angles.

1 is a perspective view showing a tennis ball throwing device of the present invention

Figure 2 is a front view showing a tennis ball throwing device of the present invention

Figure 3 is a cross-sectional view showing the operation of the tennis ball throwing device of the present invention

<Description of the symbols for the main parts of the drawings>

10: Supply box 11: Horizontal bottom 12: Both side walls

20: throw support 21: angle adjuster 22: fixed position

22a: Tightening 23: guide guide 30: rotary throwing member

31: drive motor 32: fixed plate 33: fastener

34: connection terminal 35: shaft 36: contact plate

37: pushbutton

Tennis ball throwing device of the present invention is a supply box (10) is bent in an open type that is open, front, rear and top open as shown in Figures 1 to 3, and in the arc of the supply box (10) The curved paper is shaped and fixed to the throwing support 20 which is installed to adjust the height of the tip portion up and down and the drive motor 31 installed to be controlled to operate by an external power source on the top of the supply box 10 and the It is characterized by the technical configuration that consists of a rotating throwing member 30 intermittently rotates along the throwing support (20).

In other words, the present invention is installed in the open type supply box 10 to be installed in the arc-shaped curved paper to adjust the height of the tip of the throwing support 20 up and down, the drive motor 31 installed on the top of the supply box (10) By installing the rotary throwing member 30 to intermittently rotate along the throwing support 20 by), the throwing structure of the method to push the tennis ball (1) is configured to shorten the throwing distance and to adjust the throwing angle freely will be.

Therefore, the tennis ball throwing apparatus of the present invention throws the tennis ball 1 as a short throwing method as the first rotary throwing member 30, so that it is possible to practice tennis in a narrow space indoors and outdoors without being particular about the place. As the second throw support (20), the throwing angle can be freely adjusted to throw the tennis ball (1), so that the tennis practicer can hit the throwing tennis ball (1) at various throwing angles. It will have such advantages.

Reference numeral 2 in the drawings is a support frame.

Hereinafter, the technical details of the present invention through the specific embodiments shown in the accompanying drawings in detail as follows.

The supply box 10 is formed on both sides of the narrow and long horizontal floor 12 to be opposite to each other, the wall 12 is formed in an open type that is open front, rear and top. The supply box 10 is to secure the space for installing the throwing support 20 while allowing the rotary throwing member 30 to rotate.

The throwing support 20 is bent at a curvature corresponding to the rotational trajectory of the rotary throwing member 30 to form an angle adjustment hole 21 at a predetermined position, and the predetermined position of the inner surface of the water supply box 10 It is fixed to the position installed so as to flow in the position fixing piece 22 having a fastener 22a, by raising or lowering the tip of the throw support 20 to be able to freely adjust the throwing angle of the tennis ball (1). Since the throwing support 20 is to raise or lower the tip to allow to throw the tennis ball (1) at various throwing angles, it helps the tennis practice improves skills.

And, the throwing support 20 is installed so that the rear end of the throwing support in contact with the guide guide 23 is installed on the upper rear side of the receiving box 10, the throwing support (10) 20) it is desirable to be able to flow stably.

The rotary throwing member 30 is fixed to the driving hole 31 installed to be operated by an external power source that is controlled to be supplied to the upper part of the fixing plate 32 which is installed to protrude outside the supply box 10 and fixed with a binding hole 33. It may be installed so as to rotate intermittently.

In addition, a connection terminal 34 to which an external power source is electrically connected to an upper end of the fixing plate 32 that fixes the driving motor 31 is installed on the shaft bar 35 installed at the upper end of the fixing plate 32. The contact plate 36 is provided so as to be elastically connected to or short-circuited with the connection terminal 34, and the contact plate 36 is formed at an engagement angle 33 of the rotation throwing member 30 with an obtuse angle with the rotation throwing member. By placing the pressing plate 37 so as to direct the, to control the operation of the drive motor 31 for rotating the rotary throwing member (30). This pushes the contact plate 36 which maintains the state in which the pressing interrupting plate 37 which rotates together with the rotation throwing member 30 is always connected to the connection terminal 34, thereby bringing the contact plate 36 into the connection terminal. The rotary throwing member 30 waits exactly behind the throwing support 20 by the driving motor 31 which is stopped when the power is cut off from the short circuit 34, and the contact plate 36 is restored to its original position again. When connected to the connection terminal 34, as the drive motor 31 is operated, the rotary throwing member 30 is rotated to accurately perform the operation of throwing the tennis ball (1).

Tennis ball throwing device of the present embodiment is configured to be suitable for a tennis exerciser filed as the same as the present invention, it will be clear that it can also be used as a throwing device for throwing a baseball ball.

As described above, the tennis ball throwing device of the present invention is a throwing structure that pushes a tennis ball. The throwing distance can be shortened and the throwing angle can be freely adjusted. It will be able to practice, and it will have a useful effect, such as giving a practice opportunity to hit the tennis ball thrown at various throw angles.

Claims (4)

A water supply box 10 which is bent in an open type to open the front, rear and top, and a throwing support that is installed to be able to adjust the height of the tip portion up and down as an arc-shaped curved shape inside the supply box 10. 20 and the rotary throwing member 30 which is fixedly fixed to the driving motor 31 installed to be controlled by an external power source on the top of the supply box 10 and intermittently rotates along the throwing support 20. Tennis ball throwing device, characterized in that configured. According to claim 1, The throwing support 20 is bent at a curvature corresponding to the rotational trajectory of the rotary throwing member 30 to form an angle adjusting hole 21 at a predetermined position, the supply ( 10) fixed to a fixed position of the inner surface is installed to flow in the position fixing piece 22 having the fastener 22a, by raising or lowering the tip of the throwing support 20 to increase the throwing angle of the tennis ball (1) Tennis ball throwing device, characterized in that freely adjustable. According to claim 1, The rotary throwing member 30 is bound to the drive motor 31 installed to be operated by an external power supply is supplied to the control of the upper portion of the fixing plate 32 is installed to protrude outside the supply box (10). Tennis ball throwing device characterized in that it is fixed to the ball (33) to be installed to rotate intermittently. According to claim 1 or 3, wherein the connection terminal 34 to the external power is electrically connected to the upper end of the fixed plate 32 for fixing the drive motor 31, the upper end of the fixed plate 32 The contact plate 36 is installed on the shaft bar 35 mounted on the connecting rod 34 so as to be elastically connected or short-circuited, and the oblique angle of the rotation throwing member and the obtuse angle at the binding hole 33 of the rotation throwing member 30 is fixed. By placing a pressing intermittent plate 37 to direct the contact plate 36 to achieve the control of the operation of the driving motor 31 for rotating the rotary throwing member 30, throwing a tennis ball Device.