WO1995032769A1

WO1995032769A1 - Tennis service training appliance

Info

Publication number: WO1995032769A1
Application number: PCT/DE1995/000682
Authority: WO
Inventors: Willi Wolff; Hans Penther
Original assignee: Willi Wolff; Hans Penther
Priority date: 1994-05-30
Filing date: 1995-05-29
Publication date: 1995-12-07

Abstract

A tennis service training appliance indicates with an optical and/or acoustic signal when a tennis ball is correctly served. The training appliance consists of at least two uprights (1) provided at their upper end with one or several emitters (4) and one or several receivers (5). An optical and/or acoustic signal generator (6) indicates when a tennis ball is correctly served. This training appliance is particularly suitable for tennis training and teaching.

Description

Exercise device for throwing the ball on a tennis serve

The invention relates to a training device for tennis, in particular for the exercise of the ball throw at the serve to support the tennis instructor.

State of the art

Exercise devices for the correct execution of the ball throw on tennis serve are not known. A correction or an indication of an incorrect ball throw on the serve can currently only be made by the tennis instructor or trainer. Group work or the simultaneous performance of the exercise by several athletes under the guidance of one person is not possible.

problem

The invention specified in claim 1 is based on the problem of creating an exercise device for the ball throw during a tennis serve, which indicates the correct execution of the ball throw by an optical and / or acoustic signal and thus enables support for the tennis instructor.

Invention This problem is solved with the measures of claim 1.

Achievable advantages

The advantages achieved by the invention are, in particular, that the exerciser, regardless of the tennis instructor, receives information about the correct execution of the ball throw on the tennis serve through the exercise device. The exercise device enables group work or the simultaneous supervision of several practitioners by only one teacher without the quality of the supervision being reduced. The exercise device can increase the intensity of the exercise. The exercise can also be carried out without the constant supervision of a teacher individually. In the embodiment variant with the transmitting and receiving device in one apparatus, it is achieved that the energy supply is only necessary on one stand. This simplifies production and increases user friendliness. By attaching several transmitters and receivers one above the other, the use of the exercise device can be expanded and thus the quality of the exercise device can be improved by also giving acoustic and / or optical signals from the exercise device when the ball exceeds a certain height. As a result, the practitioner can and should be trained and adjusted to throw the ball at a specific ball height.

Developments of the invention

Advantageous embodiments of the invention are in the

Claims 2 to 10 specified. The developments according to claim 2, 7, 8 and 9 serve for better handling and

Mobility of the stand. The development according to claims 3 and 10 increases the hit rate by expanding the target area of the ball or enables better evaluation of the target area of the ball by different transmitters and receivers and different acoustic signal transmitters. By means of the

Further training according to claim 4, the location of the practitioner can be corrected. The development according to claim 5 enables a quick adaptation of the exercise device to the size of the practitioner. A group work or the simultaneous practice of several people is made possible by the training according to claim 6.

embodiments

Several embodiments of the invention are shown in the drawing and are described in more detail below. Show it

1 the exercise device with two stands,

Fig. 2, the exercise device with three stands and

Fig. 3, the exercise device with two stands, only one

Stands the transmitting and receiving devices are arranged with a solar cell unit. The exercise device in its basic variant consists of two height-adjustable stands 1 with preferably three-legged feet 2, which are provided with rollers 7 for easier displacement of the stand 1. The practitioner works between the stands 1 set at a sufficient distance. A transmitter 4, for example a light source, is attached to the upper end of one stand 1 and is supplied with energy via an energy source or an energy supply 3. At the upper end of the other stand there is a receiver 5, for example a photocell, which forwards a corresponding signal to an optical and / or acoustic signal transmitter 6 via known connections and circuits if, as in the case described, the light beam passes between transmitter 4 and receiver 5 a thrown ball is interrupted. For a further and better evaluation of the target area of the thrown ball, a plurality of transmitters 4 and receivers 5 can be arranged next to and / or one above the other, which can trigger different optical and / or acoustic signals. By arranging a transmitter 8 in the lower third of one stand 1 and a corresponding receiver 9 on the other stand 1, the location of the exercising person can be checked, ie the exercising person has assumed the correct location when throwing the ball.

As already mentioned above, the stands 1 are adjustable in height, preferably telescopically extendable and provided with a length measuring device. This can quickly

Exercise device to be adapted to the respective body size of the practitioner and the horizontal adjustment of the transmitter 4 and receiver 5 is easily possible. It is also conceivable for the stands 1 to be designed without feet 2 and to be vertically rotated by 180 ° on a support structure, for example on the hall ceiling, so as to be adjustable in height. The exercise device with three or more stands 1 is particularly suitable for group training. Here, the inner stands 1 each have a transmitter 4 and a receiver 5 opposite each other at the upper end a practitioner works between two stands 1. Depending on the available area and stand 1 of the exercise device, several practitioners can work simultaneously. In a further variant, a transmitting and receiving device 10 is arranged as an apparatus only on a stand 1. Thus, only this stand 1 needs a power supply. The exercise device can also consist of only one stand 1. However, this requires a special reflector, for example on the wall of the tennis hall, for the signals from the transmitter 10. The transmitting and receiving device 10 works on the basis of the light barrier,

Ultra-barrier or as a laser device. It is also possible for the power supply to be taken over by a battery 3 and / or a solar cell unit 11 installed on the stand 1. In this case, since the exercise device is easy to transport due to the elimination of the cable, it can also be used cheaply in open spaces where the use of solar energy is particularly useful.

The control of the exercising person can be further improved by arranging a plurality of transmitting and receiving devices 10 one above the other on the stand 1. Here, the number of switched on transmitting and receiving devices 10 is freely selectable and is determined in practice by the level of the trainee. For example, the exercise device can be set so that a signal tone is given when the thrown ball has reached the desired height, but an additional signal is given when the ball rises further.

Claims

1. Exercise device for throwing the ball at a tennis serve, characterized in that two height-adjustable stands (1) with feet (2) are provided with an energy source or energy supply (3), the one stand (1) at the upper end of a transmitter (4) and the other

Stand (1) also has a receiver (5) at the upper end and at least one stand (1) is provided with an optical and / or acoustic signal transmitter (6).

2. Exercise device according to claim 1, characterized in that the feet (2) have rollers (7).

3. Exercise device according to claim 1 and 2, characterized in that the transmitter (4) and receiver (5) not only sends or receives punctiform, but that a small bandwidth can be adjusted vertically and / or horizontally or several transmitters (4) and the receiver (5) are arranged side by side.

4. Exercise device according to claim 1 to 3, characterized in that the stand (1) in the lower third has a further transmitter (8) and the other stand (1) at the same height has another receiver (9).

5. Exercise device according to claim 1 to 4, characterized in that the stand (1) are preferably telescopically extendable and provided with a length measuring device.

6. Exercise device according to claim 1 to 5, characterized in that the exercise device consists of at least three or more stands (1), the inner stand (1) at the upper end each opposite with a transmitter (4) and receiver (5) are.

7. Exercise device according to claim 1 to 6, characterized in that the stand (1) without feet (2), rotated vertically by 180 °, hang down vertically adjustable from a supporting structure.

8. Exercise device according to claim 1 to 7, characterized in that a transmitting and receiving device (10), both sub-devices combined in one apparatus, is arranged only on a stand (1), being a reflector for the transmitting and receiving device (10 ) another stand (1) is used or a special reflector is arranged on the tennis hall wall.

9. Exercise device according to claim 1 to 8, characterized in that a battery 3 and / or a solar cell unit (11) is arranged on the stand (1) as the voltage supply.

10. Exercise device according to claim 1 to 9, characterized in that a plurality of transmitting and receiving devices (10) are arranged one above the other on the 5 stand (1).