WO2004007032A1

WO2004007032A1 - Sport racket

Info

Publication number: WO2004007032A1
Application number: PCT/JP2002/007151
Authority: WO
Inventors: Hiroo Yanahara
Original assignee: Hiroo Yanahara
Priority date: 2002-07-15
Filing date: 2002-07-15
Publication date: 2004-01-22
Also published as: TWM244938U; JPWO2004007032A1; US20060166767A1; AU2002318733A1; JP3806130B2

Abstract

A racket where the tension of a string can be easily adjusted arbitrarily, comprising an annular frame body providing a striking face by stretching the string in mesh in the inner region thereof, a shaft part extending from one end part of the frame body, a throat part connecting the frame body with the shaft part, and a part being gripped by a player provided at the end of the shaft part. The racket is further provided with a plurality of string holes made through the frame body in order to pass the string, and members for adjusting the tension of the string disposed between the string holes located closely and forming the turn back part of the string wherein the turn back position of the string can be altered arbitrarily.

Description

Light

Sport rack

〔Technical field〕

The present invention relates to a sports racket that uses a string on the striking surface (ball striking surface) of tennis, knockout, etc., and in more detail, the tension has been finished. Easily adjust the tension of the string as needed.

This is related to the field racket that can be changed (adjusted).

[Technical background]

Rackets such as tennis and not tones are caused by frame rigidity, face size (hitting surface area), string repulsion, player preference, etc. As a result, the tension of the stretched string may not be satisfied. In such cases, you must either endure or re-stretch the string to the desired tension.

In addition, due to the initial elongation of the string itself and changes due to repeated use, the string tension cannot always be used in a desired state.

[Disclosure of the Invention]

The present invention has been conceived in view of such a current situation, and an object thereof is to provide a rack that can easily adjust the tension of the string with a simple configuration. .

The rack according to the first aspect of the present invention has an annular frame body in which a striking surface is formed by stretching a string in a region surrounded by an inner side, and a tip portion. In a rack having a shaft portion in which a drip portion to be gripped by a player is formed. A plurality of stringing holes (grommets) formed in the frame body to fold the string;

Placed between the string holes located close to each other to form a folded part of the string, and the folded position of the string can be changed to any position A stringing tension adjusting member,

The string tension adjusting member is constituted by a columnar member having a string abutting surface on the peripheral surface, the distance of which varies from the rotation center of the string tension adjusting member itself. It is characterized by and.

Thus, according to the thus configured racket, by operating the string tension adjusting member, the tension of the string of the rack can be easily and arbitrarily adjusted. Can be adjusted.

In the racket, when the string contact surface is formed in a tapered spiral shape on the peripheral surface of the columnar member, it is continuously changed to an arbitrary tension. This is a possible configuration. In this case, the columnar member may be made of resin, metal such as aluminum, or wooden. Alternatively, it may be made of ceramic.

In the racket, when the string contact surface is formed by a screw groove, the structure is simple and highly reliable.

The rack according to the second aspect of the invention includes an annular frame body in which a string is stretched in a net-like manner in an inner enclosed area, and a tip is formed. In the rack 卜 having a shaft portion on which a grip portion to be gripped by the player is formed,

A plurality of string holes formed in the frame body to fold the string; It is placed between the string holes that are close to each other to form a folded part of the string, and the folded position of the string is changed to any position. A possible string tension adjusting member,

The string tension adjusting member includes a screw mechanism that changes a folding position of the string.

Thus, according to the thus configured racket, the tension of the string of the racket can be easily increased by operating the screw mechanism which is the stringing tension adjusting member. It is possible to adjust to any tension.

And, compared with the racket according to the first invention, such a rack can easily change the strength of the string by utilizing the wedge action (boost action) of the screw. It is an excellent rack in terms.

If any one of the racks includes a yoke portion and the string tension adjusting member is disposed on the yoke portion, a practically preferable configuration is obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a tennis racket, which is a kind of sports racket, according to an embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view of a yoke portion of the rack shown in FIG.

FIG. 3 is a view showing the structure of the string tension adjusting member arranged in the yoke portion shown in FIG. 2, wherein (a) is a side view of the string tension adjusting member, and (b). (A) shows the state of the string contact surface formed in the spiral of the string tension adjusting member shown in (a). (A) The string tension adjustment member shown in (a) allows the string to be folded back at the lowest tension. FIG. 3C is a cross-sectional view taken along line IIIc-IIIc of (a) showing a state of being in contact with the position.

FIG. 4 is a partially enlarged cross-sectional view of the string tension adjusting member attaching portion in a state where the string tension adjusting member shown in FIG. 3 is arranged in the yoke portion of the racket. (A) is a cross-sectional view in a direction perpendicular to the longitudinal direction of the yoke showing an embodiment attached to a normal yoke, and (b) is a view taken along the arrow IVb-IVb of (a).

FIG. 5 shows an embodiment in which the string tension adjusting member itself as shown in FIG. 3 is housed in the housing hole of the member adjacent to the yoke portion. FIG.

FIG. 6 is a diagram showing the configuration of the string tension adjusting member according to the embodiment in which the columnar member is a tapered columnar member, different from FIG.

(a) is a cross-sectional view in a direction perpendicular to the longitudinal direction of the yoke when attached to the yoke, and (b) is a view taken along the line VIb-VIb of (a).

FIG. 7 is a view showing a configuration of a string tension adjusting member according to another embodiment using a screw mechanism attached to a yoke portion.

(a) is a cross-sectional view perpendicular to the longitudinal direction of the yoke, and (b) is a Vllb-Vllb arrow view of (a).

Fig. 8 shows the configuration of the string tension adjusting member according to another embodiment different from Fig. 7 using a screw mechanism. The longitudinal direction of the yoke when attached to the yoke portion It is the figure which carried out the cross section in the direction orthogonal to.

FIG. 9 is a diagram showing the configuration of a string tension adjusting member according to another embodiment having a spiral shape, as viewed from above the yoke when attached to the yoke portion. It is.

[Best Mode for Carrying Out the Invention] Hereinafter, with respect to a sports rack according to the present invention, an example of a tennis racket will be described with reference to the drawings (Example 1).

As shown in FIG. 1, the rack 1 is composed of an annular frame body 3 in which a string 2 is stretched in an inner area to form a striking surface H t. A shaft part 4 in which a drip part 7 held by the player is formed at the tip part, a yoke part 5 constituting a part of the frame body 3, and both ends of the yoke part 5 And a slot portion 6 for connecting the shaft portion 4 to each other.

In order to fold the frame 2 around the frame body 3 through the string 2, a string penetrates from the inner peripheral surface 3 a to the outer peripheral surface 3 b of the frame main body 3. A ring hole 8 is formed. A plurality of string holes 8 (see FIG. 2) are provided at predetermined intervals on the periphery of the frame body 3. Accordingly, a plurality of the yoke portions 5 forming a part of the frame body 3 are provided at a predetermined interval, and in this embodiment, six are provided.

As shown in FIG. 2, in the case of the racket 1 according to the present invention, six stringing holes 8 (8a 8a) formed in the central part of the yoke part 5 are used. , 8 b, 8 c, 8 d, 8 e, 8 f), between the string holes 8 a, 8 b, between the string holes 8 c, 8 d, A string tension adjusting member 9 is provided between e and 8f, and is held by a string 2 inserted through these holes.

The string tension adjusting member 9 according to this embodiment has a columnar body (in this embodiment, a kind of columnar body as shown in FIG. 3 (a)). The outer circumferential surface (outer circumferential surface) of Fig. 3 (a) or Fig. 3 (b) is the spiral state of the groove bottom 1 O b portion of the thread groove 10. One end of the columnar body as shown From the first to the other end, a helical thread groove 10 is formed in which the depth of the groove sequentially changes. This thread groove 10 becomes a string contact surface.

In this embodiment, as shown in FIG. 3 (a), the lead angle (pitch angle) α of the screw groove 10 is in the range of 8 degrees to 16 degrees, in particular 11.5 degrees. The degree is preferred. As a result of the inventor's attempt, this angle is obtained in order to maintain the string 2 under various conditions and to obtain the necessary adjustment range of the string 2 tension. This is the preferred angle. However, the angle is not limited to this angle, and may be an angle in the vicinity of this angle or any other angle. Further, in this embodiment, the material of the string tension adjusting member 9 is ABS resin, but it may be other resin (for example, glass fiber reinforced resin) or wooden. Alternatively, it may be made of metal such as aluminum, dial- min, or titanium, or may be made of ceramic.

The string tension adjusting member 9 shown in FIG. 3 is actually as shown in FIG. 1 or a partially enlarged view thereof shown in FIGS. 4 (a) and 4 (b). The string is formed in the thread groove 10 of the string tension adjusting member 9 between the string holes 8 formed in the yoke portion 5 and adjacent to each other (adjacent in this embodiment). In such a state that 2 is wound (see Fig. 3 (c)), the folded portion 2A of the string 2 is in contact with the string of the string tension adjusting member 9. It is arranged in such a state that it comes into contact with the thread groove 10 which becomes the surface.

In the case of this embodiment, the string tension adjusting member 9 itself is fixed to the frame body 3 of the rack 1 by the tension of the string 2.

Then, when the player 1 thinks that the player has changed the tension of the string 2, the rack 1 constructed in this way is a little more tensioned. To increase the force, a commercially available hexagon wrench (not shown) is inserted into the hexagon wrench hole 9 B formed on the top surface 9 A of the string tension adjusting member 9. In this embodiment, if the string tension adjusting member 9 is inserted and rotated counterclockwise in FIG. 1 or FIG. 4 (a), the tension can be increased. it can. On the other hand, the tension can be reduced by rotating it clockwise.

Specifically, for example, when the string 2 is rotated, the string contact surface of the string tension adjusting member 9 is in contact with the outer periphery of the frame body 3. If the surface is changed 2 mm, the tension of string 2 can be changed by about 5.7 pounds (2.6 kgf), and the amount of change can be changed by about 3 mm. If configured to be able to do this, the tension of string 2 can be changed by approximately 8.5 pounds (38 kgf), and it can be changed by 2 to 3 mm. If it is left, it will be a practically sufficient value.

Further, in this embodiment, only the string 2 in the vertical direction of the single spot area of the rack 1 of the string 2 is configured so that the tension can be adjusted. However, if necessary, the tension in the lateral string 2 of the switch spot area may be adjustable, or it may be configured to be adjustable as a whole. Good.

However, the tension of the string of the rack can be adjusted effectively simply by changing the tension of the vertical string of the switch spot area. .

(Example 2)

Further, as shown in FIG. 5, a receiving hole member 20 is provided adjacent to the yoke portion 5 so as to follow the yoke portion 5, and the receiving hole member 20 has a cylindrical shape. Shaped accommodation hole (accommodation hole for string tension adjusting member 9) 2 OC is formed, and this accommodation hole 2 OC is configured to be completely accommodated except for the top and bottom surfaces. May be. In the case of the rack 1 according to the second embodiment, as shown in FIG. 5, all of the string tension adjusting member 9 and the folded portion of the string 2 are all folded. Since it is in a state of being accommodated inside the accommodation hole member 20, it is an embodiment excellent in appearance.

Also in this embodiment, a hexagon wrench (not shown) is inserted into the hexagon wrench hole 9 B formed on the top surface 9 A of the string tension adjusting member 9 to Adjust the tension of ring 2.

(Example 3)

For the string tension adjusting member 9, the string 2 is a string contact surface on the peripheral surface of the truncated tapered columnar body as shown in FIG. A screw groove 10 around which the wire is wound may be formed. In these drawings, reference numeral 24 designates a grommet interposed between the string tension adjusting member 9 and the yoke portion 5. The grommet 24 may be made of synthetic resin such as nylon or rubber.

(Example 4)

As another embodiment, as shown in FIGS. 7 (a) and 7 (b), string tension is applied to the outer peripheral surface of the frame body 3 (including the yoke portion 5). An adjusting member 9 may be provided. In the string tension adjusting member 9 according to this embodiment, the two wedge members 1 3 A and 1 3 B are relatively moved by the screw mechanism 1 2, and the two wedge members 1 3 A , 1 3 B The height of the valley 14 formed between B (distance from the side surface of the yoke part 5) changes, so that the tension of the string 2 held by the valley 14 changes. It is possible to make it happen. Reference numeral 24 denotes a grommet interposed between the string tension adjusting member 9 and the yoke portion 5.

(Example 5)

Also, as shown in FIG. 8, the frame body 3 (yoke part 5 Are formed in the frame body 3 in parallel with the string 2 from the outer circumferential surface to the inner circumferential surface, and the borehole 1 6 is formed in the female thread hole 15. And the head 16 h of the Bonoret 16 is formed into a concave curved surface so that the string 2 can be easily held. The head 1 of the bolt 16 String tension adjustment with a configuration that changes the tension of string 2 by allowing 6h to be inserted and removed relative to screw hole 15 It may be member 9. Reference numeral 24 denotes a grommet interposed between the string tension adjusting member 9 and the yoke portion 5.

(Example 6)

In addition, the string tension adjusting member 9 is constituted by a three-dimensional spiral linear body whose thickness changes continuously as shown in FIG. Depending on the desired tension, the part where the folding position of the string 2 abuts may be changed. Of course, the string tension adjusting member 9 is not shown on the outer peripheral surface 3 F of the frame body 3, but directly or as shown in FIG. 9, the outer surface 2 of the grommet 24. 4 Touch to F.

In the above embodiment, a rack having a yoke portion has been described as an example. However, the present invention can be applied to a rack having a yoke portion or a rack having no yoke portion. Is also applicable. And in the case of a rack without a yoke part, instead of the string hole formed in the yoke part, the string hole is similarly applied to the frame body at the corresponding part. Will be provided.

In the above description, the tennis racket was explained exclusively. However, the rack has a string of strings on other striking surfaces. It can be applied to various racks such as squash. [Possibility of industrial use]

The present invention is implemented in the form as described above, and according to the rack of the present invention, it is possible to easily and quickly stream according to the preference of the player with a simple configuration. The tension of the ring can be changed.

In addition, according to the racket of the present invention, there is no particular increase in weight, and there is no appearance unbalance.

Claims

Demand car β range

1. An annular frame body in which the struts are stretched in a mesh pattern in the inner enclosed area to form a striking surface ', and a drip part held by the player at the tip In a rack for sports having a shaft part formed with

A plurality of string holes formed in the frame body to fold the string;

Placed between the string holes located close to each other to form a folded part of the string, and the folded position of the string can be changed to any position A string tension adjusting member,

The string tension adjusting member is constituted by a columnar member having a string abutting surface on the circumferential surface, the distance of the string tension adjusting member from the rotation center of the string tension adjusting member changing. A rack characterized by

2. The rack according to claim 1, wherein the string contact surface is formed in a tapered spiral shape on a peripheral surface of the columnar member.

3. The rack according to claim 2, wherein the string contact surface is formed by a thread groove.

4. An annular frame body in which the struts are stretched in a mesh pattern in the inner enclosed area, and a drip part that the player holds at the tip In a rack for sports having a shaft part formed with

Formed on the frame body to fold the string. Multiple string holes,

A string that is placed between the string holes located in close proximity to each other to form a folded portion of the string, and the folded position of the string can be changed to any position. A ring tension adjusting member, and

2. A rack according to claim 1, wherein the string tension adjusting member includes a screw mechanism for changing a folding position of the string.

The rack according to any one of claims 1 to 4, wherein the rack includes a yoke portion, and the string tension adjusting member is disposed on the yoke portion. The rack described in the section.