JPH03296630A - Device for measuring tension of gut of racket - Google Patents

Abstract

PURPOSE: To regulate the tension of a gut by providing a multiple tuning fork having a plurality of teeth closely to a rounded end part and applying the rounded part against the gut so that one tooth oscillates depending on the tension of the gut. CONSTITUTION: The inventive apparatus has one elongated end 1 and the other rounded end 2 formed to hit the gut of a racket. The apparatus is provided with a plurality of protrusions 3 on the side face and a multiple tuning fork 5 is provided at the part where the protrusions 3 are provided. A series of marks 7 corresponding to a plurality of teeth 6 of the fork 5, respectively, are put on the protrusions 3 and one tooth 6a of the tuning fork 5 oscillates when the end part 2 touches the gut of racket. Tension of the gut can be determined by detecting oscillation of the tooth 6a and associating the oscillation to the mark 7a.

Description

Detailed Description of the Invention [Industrial Application Field 1] The present invention measures the tension of the strings of a racket used in tennis, squash, etc., to determine whether the tension of the strings of the racket is suitable for the conditions under which the racket is normally used. Regarding equipment that can be used to find out what is happening.

[Problem to be solved by the invention] A player who owns several types of rackets knows the most suitable tension for each of these rackets, and uses a racket with such tension to meet his own needs. We are playing a match together. Therefore, in order to know the tension of the racket that the player owns, the player needs to be able to measure whether the tension is suitable for him/her.

For example, such measurements may be performed using auditory impressions or physical impressions. In any case, if such an impression can be made objective, it will be possible to immediately know whether the tension in the string of the racket is appropriate.

SUMMARY OF THE INVENTION The present invention provides a simple device capable of producing a perceivable measurement in response to the tension of the gut, allowing the signal to be emitted or measured.

Basically, the measuring device according to the invention consists of an elongated member, for example rounded at one end and substantially coincident with one another at the other end. Adjacent to this rounded end is a multi-tuning fork or tuning device consisting of a series of independent teeth, the independent tines projecting separately from the fixed base of the tuning fork. This tuning fork is firmly fixed by a base, from which a plurality of teeth freely rise. By simply applying a portion of the racket string to the rounded end of the measuring device, a vibration will immediately occur in one of the teeth of the multiple tuning fork, depending on the tension of the string.

This vibration of the teeth can be perceived, for example, visually, and can be made to correspond to a scale with graduations such as numbers or codes. If the racket is in a suitable condition for the player, the corresponding sign will indicate a good measurement for gut tension. If the racket has been used for a long period of time and the player wants to check whether the tension is in the proper condition, the player can strike the racket again with the measuring device of the present invention and make sure that the vibrating teeth are the same. In this case, it can be seen that the racket is in the required condition.

If the vibrating teeth were of a different length, for example if they were short in length, the tension in the gut would be greater than the required tension; If it is long, the tension in the string will have decreased; in this way the player will know whether to loosen or tighten the string on the racket. The multiple tuning fork according to the present invention may have an outer shape in which the height of the plurality of teeth gradually decreases, for example, so that by hitting the gut of the racket,
- Only the teeth of the book vibrate, and at the same time the vibrating teeth can be noted and easily compared with symbols or landmarks placed on the measuring device.

According to the present invention, as mentioned above, the multiple tuning forks have a certain size and may be made of plastic, metal, etc. A portion of a multiple tuning fork is attached to at least one side of the measuring device, and this multiple tuning fork includes:
A series of symbols or markings are associated with each of the plurality of teeth so that the vibrating teeth can be identified by reading the corresponding markings.

The present invention also includes automating the desired measurements by suitably digitizing the vibrations of specific teeth of the tuning fork using suitable known equipment.

By the vibration of one of the teeth of the tuning fork according to the present invention, for example,
A perceivable audio signal may be generated and this signal may be digitized.

[Example] The features of the present invention as described above and other features will become clearer from the accompanying drawings showing an embodiment of the present invention.

In the embodiment shown in FIG. 1, the measuring device according to the present invention has a negative end 1 that is elongated, but the other end 2 is rounded so that it cannot hit the racket, i.e., give it vibration. It is made of an elongated U-shaped member that allows for The U-shaped member of the measuring device is provided with a plurality of projections 3 on its side surfaces. A second diagram showing a plan view of the embodiment.
As is clear from the figure, multiple tuning forks 5 are provided at the locations where the side protrusions 3 forming both wings of the measuring device are provided. This tuning fork is stably fixed to the arm of the measuring device by suitable means such as screws.

A series of symbols or markings 7 are attached to the protrusion 3 so as to correspond to each of the plurality of bellows 6 of the tuning fork. When the rounded end 2 comes into contact with the racket gut, one of the teeth 6a of the tuning fork vibrates. This can be confirmed, for example, visually, since the remaining teeth 6 remain stationary.

In this way, the user is aware of the vibrations of the teeth 6a and can associate this with the corresponding markings 7a. If this mark 7a indicates the required string tension, the string has been adjusted as desired.

If this is not the case, you will need to adjust the tension of the gut.

A multi-tuning fork or tuning device is shown in FIGS. 3 and 4, having a base 5 and a tuning fork or tuning device of a known shape within a range by projecting at different heights or lengths. It consists of a series of teeth 6 that allow for tuning.

Although this embodiment is an example of a technical solution within the scope of the present invention, it does not exclude modifications using other structures for the tuning fork or for the measuring device.

The illustrated embodiment is extremely inexpensive and allows instant adjustment of the racket string tension.

As mentioned above, the technique according to the present invention may optionally be combined with digital devices that work by physical vibrations of the teeth or by audio effects of the vibrations.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of a basic measuring device according to the present invention, and FIG. 2 is a plan view of FIG. 1, showing multiple tuning forks incorporated into the measuring device. Yes, 3rd
FIG. 4 shows an elevational view and a left side view of the tuning fork, respectively.

Claims (4)

[Claims] (1) formed of an elongated member with a rounded end for striking a gut and a grip-shaped end, with a multiple tuning fork having a plurality of teeth adjacent to the rounded end; By applying the rounded part of the measuring device to the string, one of these teeth vibrates according to the tension of the string, and by detecting this vibration, the mechanism housed inside can detect the vibration. A device for measuring the tension of a racket string, characterized in that the tension of the string can be measured. (2) In the tuning fork, when one of the teeth vibrates, a visible fluctuation occurs in that tooth, and by comparing this tooth with the calibrated scale of the device, it is possible to determine which tooth vibrates. The apparatus for measuring the tension of a racket string as set forth in claim 1, which is capable of measuring the tension of the string. (3) the signal from the fluctuating or vibrating teeth;
An apparatus for measuring the tension of a racket string according to claim 2, characterized in that the tension can be measured by transmitting the information to a digital device connected to the apparatus. (4) The racket according to claim 1, wherein the tuning fork generates an audio signal through the vibration of its teeth, and this can be digitized by a device attached to the measuring device itself. A device that measures the tension of a string.