JP2852686B2 - Equipment for measuring racket gut tension - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention measures the gut tension of a racket used in tennis, squash, etc., so that the gut tension of the racket can be adjusted to the conditions under which a normal racket is used. Related to a device that can be checked whether or not.

[Problems to be Solved by the Invention] A player who has several kinds of rackets knows the most opposing tension on each of these rackets, and can use his racket with such tension to meet his own requirements. The match is being held. For this reason, in order to know the tension of the racket that the player has, the player needs to be able to measure whether the tension is equal to the player.

For example, such measurement may be performed based on an impression based on hearing and a physical impression. In any case, if such an impression can be made objective, it will be possible to immediately know whether or not the racket gut tension is appropriate.

[Means for Solving the Problems] The present invention provides a simple device that can perform a perceptible measurement in which a signal can be output or a measurement can be made according to the tension of a gut.

Basically, the measuring device according to the present invention is made of a long member, for example, having one end rounded and the other end substantially coincident with each other. Close to the rounded end is a multiple tuning fork or tuning device consisting of a series of independent teeth, the independent teeth projecting separately from the fixed base of the tuning fork. The tuning fork is firmly fixed by the base, from which a plurality of teeth are freely raised. A single blow with a gut of a racket on the rounded end of the measuring device immediately causes an oscillation in one of the teeth of the multiple tuning fork, depending on the gut tension.

This tooth vibration can be perceived by the eyes, for example,
It can correspond to a scale with scales such as numbers and signs. If the racket is in opposition to the player, the corresponding sign will indicate a good measurement for gut tension. If the racket has been used for a long time and the player wants to check that the tension is in the proper state, the player hits the racket again with the measuring device of the present invention and the vibrating teeth are the same. In that case, the racket is found to be in the required state.

If the oscillating teeth are different, for example, if they are short in length, the gut tension will be greater than the required tension, and if the oscillating teeth are of length If it is long, the gut tension will be reduced, thus allowing the player to know whether to loosen or tighten the racket gut tension. The multiple tuning fork according to the present invention may have, for example, an outer shape in which a plurality of teeth are gradually reduced in height, and by hitting the racket gut, only one tooth vibrates. At the same time, attention can be paid to the oscillating teeth and to a simple comparison with the symbols or landmarks on the measuring device.

According to the present invention, as described above, the multiple tuning fork has a certain size and may be formed of plastic, metal, or the like. On at least one side of the measuring device, a part of a multi-tuning fork is mounted, the multi-tuning fork being provided with a series of symbols or markings so that a plurality of teeth correspond to each other, The oscillating teeth can be identified by reading the corresponding landmarks.

The present invention also provides a method of properly digitizing the vibration of a specific tooth of a tuning fork using a known appropriate device,
This includes automating the desired measurements.

The vibration of one of the teeth of the tuning fork according to the invention may, for example, generate a perceptible audio signal and digitize this signal.

[Embodiment] The above-mentioned features of the present invention and other features will become more apparent from the accompanying drawings showing an embodiment of the present invention.

In the embodiment shown in FIG. 1, the measuring device according to the invention is such that one end 1 is elongated, while the other end 2 is rounded, so that the racket can be hit or vibrate. It is made of an elongated U-shaped member adapted to be made. The U-shaped member of the measuring device is provided with a plurality of protrusions 3 on a side surface. As is clear from FIG. 2 showing a plan view of the embodiment, a multiple tuning fork 5 is provided at a position where the side projections 3 forming both wings of the measuring device are provided. This tuning fork is stably fixed to the arm of the measuring device by a suitable means such as a screw.

The projection 3 is provided with a series of symbols or marks 7 corresponding to each of the plurality of teeth 6 of the tuning fork. When the rounded end 2 comes into contact with the racket gut, one of the tuning fork teeth 6a vibrates. This can be confirmed, for example, by eye, since the remaining teeth 6 remain stationary.

In this way, the user can know the vibration of the tooth 6a and associate it with the corresponding mark 7a. If this mark 7a indicates the required gut tension, the gut has been adjusted as desired. If not, it is necessary to adjust the gut tension.

A multi-tuning fork or tuning device is shown in FIGS. 3 and 4 which is of a known shape and which is within a certain range by projecting at different heights or lengths from the base 5. And a series of teeth 6 that can be tuned.

This embodiment is an example of a technical solution within the scope of the present invention, but does not exclude a modification using a different structure with respect to a tuning fork or a measuring device.

The embodiment shown is very inexpensive and allows the racket gut tension to be adjusted immediately.

As mentioned above, the technology according to the present invention may be combined with a digital device acting, as the case may be, by physical vibration of the teeth or by the sound effects of the vibration.

[Brief description of the drawings]

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 a multiple tuning fork incorporated in the measuring device. FIGS. 3 and 4 show an elevation view of the tuning fork and a left side view thereof, respectively. DESCRIPTION OF SYMBOLS 1 ... One end, 2 ... The other end, 3 ... Projection, 5 ... Tuning fork, 6 ... Teeth

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G01L 5/04 G01N 3/00 G01H 17/00 A63B 51/14 WPI / L (QUESTEL)

Claims (4)

(57) [Claims] 1. An elongated member having a rounded end for tapping and a grip-shaped end, and having a plurality of teeth proximate to the rounded end. By providing a multiple tuning fork, one of these teeth vibrates according to the gut tension by applying the rounded part of the measuring device to the gut, and by detecting this vibration,
An apparatus for measuring the gut tension of a racket, wherein the gut tension can be measured by a mechanism housed therein. 2. In the tuning fork, when one of the teeth vibrates, the tooth has a fluctuation which can be visually confirmed. The tooth is illuminated with a graduated scale of the apparatus, so that the tooth having the vibration is generated. The apparatus for measuring the gut tension of a racket according to claim 1, wherein the gut tension can be measured accordingly. 3. The racket gut according to claim 2, wherein the signals from said fluctuating or vibrating teeth can be measured by transmitting them to a digital device connected to the device. A device for measuring the tension of 4. The apparatus according to claim 1, wherein said tuning fork produces an audio signal by vibrating teeth, and the audio signal can be digitized by a device attached to the measuring device itself. A device to measure the tension of the racket gut.