JPH0938241A - Racket having four throats - Google Patents

Abstract

PROBLEM TO BE SOLVED: To design the structure of the throat of a racket and the arrangement of a gut suspending part, and increasingly improve stroking performance and racket operating performance. SOLUTION: A throat 1 is formed of four throats, a gut suspending part 6 is made into one plate form, and its arrangement related to the frame height is variously designed, so that an effective working area of a gut 7 is maximized, or a gut distributing area of the same length is extended to extend the sweet spot. Further, four throats 5 are utilized to improve the form of the throat 1 so as to be easily touched by fingers or easily held, and the racket operability or the recognizing performance of the gut surface when held is improved. The sectional form of the frame 2 is also considered to improve the driving performance near the frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improving the hitting performance and the handling performance of a racket by devising the structure of the throat of the racket and changing the shape and arrangement method of the gut suspension.

[0002]

2. Description of the Related Art In the prior art, the throat of a racket is generally called an open throat, and two arms connect a frame and a handle. In particular, at the joint between the throat and the frame, that is, around the root of the yoke, the frame height was considerably high in terms of strength, so that there was a very long gut penetration. In addition, the gut suspension part consists of the outer peripheral member and the inner peripheral member, and the size of the gut surface is only the area surrounded by the prepared hole. Going to has become very short.

In short, in the conventional racket, the number of guts having the same length is small, and the basic length of the gut is extremely short particularly at the edge portion, so that the hitting performance at the edge portion is poor.
In addition, there are two upper and lower constituent members in the frame penetrating part of the gut, and the space distance separating them is quite long, and the gut inside penetrating gut is difficult to operate effectively at the time of hitting, and the effective area of the gut surface is the largest in the frame. It was just the part surrounded by the inner circumference. In particular, in the throat part, there was a long and useless gut passing through the inside of the joint between the throat and the frame, and in fact, although the frame height was the highest, the gut surface could not be effectively expanded.

[0004]

In a frame of a given frame, the effective working area of the racket surface including the gut surface and the frame itself is maximized, and as a result, the sweet spot of the racket is expanded.

Particularly, to effectively expand the racket gut area near the base of the yoke. In addition, the ease of holding a racket with four throats should be realized.

Align the basic length of the gut as much as possible. As a result, create a gut surface that is substantially rectangular and dramatically expand the sweet spot.

An object of the present invention is to completely solve the above problems.

[0008]

In order to achieve the above object,
The throat has four throats near the joint between the throat and the frame, that is, the conventional throat is provided with a tunnel along the frame, and the outer periphery of the frame is also formed inside the joint between the frame and the throat. In addition, Japanese Patent Application No. 7-53
In consideration of 146, in the frame in which the constituent members related to the gut suspension are unified and the prepared hole is eliminated, the gut suspension part is placed in various effective positions in height and height in consideration of the cross-sectional shape of the frame. Deploy. There are six of these means individually, which will be described in detail below.

The first means is the means relating to claim 1,
This is a means of providing a tunnel in the throat as shown in FIG. If the conventional open throat racket has two throats, it will have four throats on the left and right. This makes it possible to create the outer periphery of the frame inside the throat. Moreover, in view of Japanese Patent Application No. 7-53146, if the gut suspension portion is made of a single constituent member, the pilot hole can be eliminated at the joint portion of the throat and the frame, so that the gut surface is made to be submerged inside the frame. It can be greatly expanded.

The second means is the means relating to claim 2,
If there are four throats, it is necessary to devise the tunnel part in a shape that is advantageous for gut tensioning and racket holding. For example, as shown in FIG. 2A, if the plate-shaped four throats are used, the throat tunnel can be made sufficiently large, so that the gut can be easily stretched on the gut suspension portion inside the throat tunnel. Further, by providing a flat finger rest orthogonal to the gut surface near the exit of the throat tunnel, the performance of recognizing the gut surface by the hand holding the racket is improved. As shown in FIG. 2 (b), such a finger pad can have a shape in which the finger fits snugly or various shapes that are advantageous in racket operation, which can improve the operation performance of the racket. At the same time, the shape of the throat other than the four throat can be devised so as to contribute to the improvement of operability. For example, Fig. 2 (c) shows an easy-to-grip throat that can be easily wrapped with five fingers. With such a throat, the racket holding is stabilized at a certain preferable position, and the play performance is improved. Is improved. Molding a finger stopper for stopping the displacement of the finger on the throat to some extent as shown in FIG. 2 (d) has the same effect. Many other examples are possible because these shape ideas are in balance with the shape of the throat tunnel.

A third means is a means according to claim 3,
In view of Japanese Patent Application No. 7-53146, it is a means for disposing a single gut suspension at the highest position of the frame over the entire frame. This shows how the gut suspension parts are arranged in the frame body in Fig. 3 (e). Of course, because of the four throats, the gut surface is large especially at the joint part of the throat and the frame. Expanded. By doing so, it is obvious that a gut surface submerged inside the frame is formed, and the racket gives the maximum gut surface in a given frame. A cross-sectional view of this frame is shown in FIG.
(B), FIG. 4, (a), and FIG. 4, (c), etc., and a reinforcing bridge may be provided on the inner surface of the frame.

A fourth means is a means relating to claim 4,
In view of Japanese Patent Application No. 7-53146, a single gut suspension is arranged in the frame body of the frame as close to a rectangle as possible as a whole. To this end, as shown in FIG. 3 (a), the gut suspension portion is made as linear as possible in a frame portion such as the frame side or the frame top where it is possible. However, since the frame shape has a curvature, as a result, the height of the gut suspension portion is differently arranged in each portion of the frame. For example, FIG. 3, (c)
Like the frame top, the center of the yoke, and the center of the frame side, the gut suspension is the lowest in the middle of the linear suspension. On the other hand, at the frame top corner or the like as shown in FIG. 3B, the gut suspension is arranged at the highest position. Further, depending on the height of the gut suspension portion, there is an advantageous cross-sectional shape, so that the angle of the side surface of the frame with respect to the gut surface may change accordingly in each part of the frame. For example, in the frame top, the side surface of the frame inclines toward the gut surface as shown in FIG.
As in (b), it inclines toward the outer peripheral portion of the frame.
However, all frame side surfaces may be parallel to the gut surface, for example, and this embodiment is not shown. Even if a linear gut suspension portion is intended, two types of gut suspension portions can be formed in a portion that cannot be formed by a straight line, such as a frame top corner. One is Figure 3,
As in (a), this is a conventional gut suspension part by a method of arranging along the curved line on the outer circumference of the frame. Another method is Japanese Patent Application No. 7- ?. ? ? ? ? In view of FIG.
As in (d), it is a method of arranging the gut suspension parts in a stepwise manner. This will ensure that the tension of the tension gut is at a right angle,
It is possible to avoid a sharp angle between the gut suspension part and the gut, and it is stably suspended.

A fifth means is a means relating to claim 5,
It is a means for stabilizing the gut behavior when the gut suspension is located at the highest position, that is, at the outermost periphery of the frame. If the gut suspension portion is arranged at the highest position, the gut surface exists so as to sneak into the inside of the frame, and the effective operating gut exists even near the outermost peripheral portion of the frame body. However, it is expected that the gut may contact the inner wall of the frame in some cases when the gut surface is dented by the impact near the frame, and taking this into consideration, the cross section of the frame should be contacted with the inner wall of the gut as smoothly as possible. Devise the shape. As shown in Fig. 4 (a), the inner surface of the frame should be opened downwards, or as shown in Fig. 4 (c), when the gut contacts the frame, it should be smooth. It is enough to make a curved part.
As shown in FIGS. 4, (b) and (d), when the gut actually contacts the inner wall of the frame, the gut contacts the inner wall with a smooth curved line, and no severe bending occurs. However, this is only annoying when the inner surfaces of the frame are separated by a considerable distance.

A sixth means is a means relating to claim 6,
It is a means of stabilizing the gut behavior when the gut suspension is located at the lowest position. If the gut suspension portion is arranged at the lowest position of the frame height, that is, the innermost peripheral portion of the frame so as to project to the gut surface, the gut is severely impacted when hit near the frame. If the gut swings or slips and the impact cannot be escaped, the ball that hits the gut surface will easily cut the gut. In order to release the shock well, the shape of the gut hole is devised to be U-shaped as shown in FIGS. 5 (a) and 5 (b). Is this a Japanese patent application 7-? ? ? ? ? In view of the above, it is a method of utilizing gut sliding on the frame. Thus, in the U-shaped gut hole, as shown in FIG.
When hitting in the vicinity of the frame, the gut can be displaced, and the displacement movement swing reduces the burden on the gut, reduces gut breakage, and brings a corresponding softness to the gut surface.

[0015]

In the operation of the four throat, it is interesting that the portion where the bending load of the frame is the largest, that is, the connecting portion between the throat and the frame is increased from one constituent member to two. When hitting, look at the gut side in front of the four throats,
Elongation is on the same side and compression is on the opposite side. As a result, or even if the constituent mass is reduced, the throat may have a high flexural strength, and there is a desire for weight reduction.

[0016]

1 (a) is an embodiment of a gut suspension consisting of a throat tunnel, four throats and a single component. At the joint between the throat and the frame, the gut digs deep inside the frame.

FIG. 2 (a) shows an embodiment of a racket having four plate-shaped throats. Immediately below the very large throat tunnel, there is a flat finger rest on which the thumb rests when holding the racket, improving the recognition performance of the gut surface. 2 (b) shows an example of a circular throat tunnel and a curved finger rest. FIG. 2 (c) shows an embodiment of a throat that is easy to hold and that can be easily gripped so that it fits roundly in the depression of the hand.
FIG. 2 (d) shows an embodiment of a throat that has a finger-holding knob so that the finger does not drop to the lower part of the throat and is easy to grip. These shapes, of course, show the best effect in combination with the four throats, but some effects can be expected even with the conventional frame.

FIG. 3 (a) is an embodiment of a single gut suspension arranged so as to be as rectangular as possible. Further, FIGS. 3, (b) and (c) are examples of the frame cross section of the frame in which the inclination of the frame side surface is different in each part of the frame according to the change in the height of the gut suspension. FIG. 3 (d) is an example of a stepped gut suspension at the frame top corner. FIG. 3 (e) is an embodiment of the frame in which the gut suspension is arranged at the highest position all around the frame. This is a method of achieving the maximum gut area with a given frame.

FIG. 4 (a) is an example of a trumpet-like inner surface of the frame in which the gut suspension is at the highest position. This is a pipe frame. FIG. 4C is an example of the curved inner surface of the frame in which the gut suspension is at the highest position. This is a plate-shaped frame.

FIG. 5 (a) shows a U by a pipe frame.
3 is an example of a U-shaped gut suspension and a U-shaped gut hole.
FIG. 5B shows an example of the U-shaped gut suspension portion and the U-shaped gut hole formed by the plate-shaped frame.

[0021]

First, in a given frame, that is,
The effect of maximizing the effective working area of the gut with a frame whose frame size is limited is very large. In order to obtain the same effective operating area with a conventional frame, there is no choice but to make the frame one size larger. However, with this, the racket becomes too large and the operability deteriorates. The area of the sweet spot can be surely expanded by one frame without deteriorating the operability, and the hitting performance can be greatly improved. This would not be possible without the combination of four throats and a single plate gut suspension. However, even in the conventional frame, it is easy to imagine that at the joint between the throat and the frame, "a similar effect can be expected if only the prepared hole is submerged deep inside the frame". .

Secondly, if the gut lengths are close to a rectangle, the spots are not cut in a circular shape because the operating area of a uniform long gut is large, and the corners of the rectangular spots are close to the center of the gut surface. The taste is guaranteed, and the sweet spot expands dramatically.

Secondly, the four throats are expected to improve the racket operability. The throat tunnel is used to realize a frame that is easy to hold as a whole. Also,
The recognition performance of the gut side improves and the performance of the player also increases.

Fourth, the gut contacts the frame at one point, and the gut vibration is transmitted to the frame from one point.
It can be expected that the pronunciation of the frame will be improved.

[0025]

[Brief description of drawings]

FIG. 1A is an overhead view of a part of a frame having a throat tunnel, four throats, and one plate-like gut suspension portion. (B) is a plan view of the same frame as seen from a direction perpendicular to the gut plane.

FIG. 2A is a bird's-eye view of a plate-shaped four throat seen from the front. (B) is the bird's-eye view which looked at the circular throat tunnel from the front. (C) has finger rests on the four throats, and the entire throat has roundness,
It is a top view of a throat which is very easy to hold and hold.
(D) is a plan view of the throat provided with finger stoppers so that the finger holding the throat does not slip.

FIG. 3 (a) is a plan view of a frame in which a single plate-like gut suspension portion is arranged as close to a rectangle as possible. The throat tunnel is continuous as it is on the yoke. (B) is a frame cross-sectional view at the frame top corner when the inclination of the frame side surface changes in each part of the frame. (C) is a frame cross-sectional view at the frame top when the inclination of the frame side surface changes in each part of the frame. (D) is a longitudinal cross-sectional view of the stepped gut suspension portion at the frame top corner. (E) shows the single plate-like gut suspension portion at the highest position of the frame, that is,
It is a top view of the frame arrange | positioned near the outermost peripheral part.

FIG. 4A is a cross-sectional view showing the inner side surface of the trumpet-shaped frame of the pipe frame in which the gut suspension is arranged at the highest position. (B) is a cross-sectional view showing a gut behavior when a ball is hit very close to the frame.
(C) is sectional drawing which shows the curved inner surface of the plate-shaped frame in which the gut suspension part was arrange | positioned in the highest position. (D)
FIG. 6 is a cross-sectional view showing a gut behavior when a ball is hit very close to the frame.

FIG. 5A is a cross-sectional view showing a U-shaped gut hole and a U-shaped gut suspension part of a pipe frame in which the gut suspension part is arranged at the lowest position. The figure shows the sliding and range of motion of the gut. (B) is sectional drawing which shows the U-shaped gut hole and the U-shaped gut suspension part of the plate-shaped frame in which the gut suspension part is arrange | positioned in the lowest position. (C) is a cross-sectional view showing the gut behavior when the ball is hit very close to the frame.

[Explanation of symbols]

1 Throat 21 Trumpet-shaped inner surface 2 Frame 22 Curved inner surface 3 Yoke 23 Reinforcement bridge 4 Throat tunnel 24 Gourmet 5 N 4 throat 25 Ball 6 Gut suspension 26 U-shaped gut hole 7 Gut 27 Gut movable range 8 Plane finger rest 9 Curved finger rest 10 Plate-shaped 4 throats 11 Easy-to-grip throat 12 Finger stop 13 Grip 14 Linear gut suspension 15 Curved gut suspension 16 Staircase gut suspension 17 Frame top 18 Frame top corner 19 Frame side 20 Frame side

Claims (6)

[Claims] Hereinafter, for the sake of clarity of expression, the "frame" is limited to a portion related to the gut tensioning of the frame body of the racket. Also,
"Frame cross section" means a cross section of the frame through a plane that passes through the center of the gut plane and is perpendicular to the gut plane, and "longitudinal cross section" means a cross section of the frame along a plane that includes the gut plane. . Further, a part of the frame cut into two frame cross sections separated by at least one gut mesh will be referred to as a "frame segment". When a certain frame segment is placed on the horizontal plane with the gut side down and the frame cross section is viewed in the front, the height of the segment is called “frame height” and the width of the segment is called “frame width”. In a normal pipe frame, the longitudinal cross section of the frame section is called an "outer peripheral member" that constitutes the frame outer peripheral portion and an "inner peripheral member" that constitutes the frame inner peripheral portion near the gut surface side. It consists of two separate members, and when the gut tip is inserted from the outside of the frame toward the gut surface to stretch the gut, the gut tip is cut out on the outer peripheral member that is outside the frame and passes first. The formed gut hole is defined as an “upper hole”, and a hole on the gut surface side that is different from the upper hole cut through the inner peripheral member of the frame and whose tip is removed is defined as a “prepared hole”. In addition, the substantially columnar space obtained by connecting the figures drawn by the upper hole and the lower hole with the shortest straight line group is referred to as a "gut penetrating portion". Then, a portion of the frame structure which is an outer peripheral member having a longitudinal cross section and which is to be in contact with the gut in the gut stretched state is defined as a “gut suspension part”. Also, of the frame outer surfaces, the frame outer surface that is visible from the direction perpendicular to the gut surface is the "frame side surface"
Call. There are two front and back sides on the frame. Further, among the outer surfaces of the frame, if the racket has an outer surface that is invisible from the direction perpendicular to the gut surface and hidden behind the side surface of the frame, this invisible outer surface is referred to as the “inside surface of the frame”.
The inner surface of the frame has two surfaces so as to sandwich the gut surface. 1. A throat tunnel in which a joint portion between a throat and a frame of a racket is divided into two parts such that the joint portion sandwiches the frame and is joined to the frame, and the joint portion between the throat and the frame is along the frame. And the throat is counted in this portion, the throat has a total of four throats as a whole. For the longitudinal cross section of the frame, the gut suspension composed of the outer peripheral member has a yoke when the gut hole is not cut. It is configured so that it is closed from the outer peripheral part to the racket head in a substantially continuous curve, and there is a gut suspension part on the outer peripheral part of the frame inside the throat tunnel. A racket constructed so that the gut can be suspended on the gut suspension on the outer periphery of the frame. The gut hole of the frame may be simultaneously molded at the time of molding the frame, or may be cut after the molding. Also, the throat portion forming the side wall of the throat tunnel is referred to as "four throats", and the four throats of the racket are pipes themselves or are not pipes but are composed of one plate-shaped component member. I don't mind. 2. Regarding the shape and configuration of the throat itself and the throat tunnel and the four throats of the racket having the throat according to claim 1, first, regarding the shape of the throat tunnel viewed from the front side, the gut suspension in the tunnel. It is easy to stretch the gut on the part, make a tunnel with a thickness exceeding the frame width, and further devise the tunnel shape such as circular, elliptical, rectangular, etc.
For example, the thumb is formed into an ergodynamic shape so that it fits nicely into the throat tunnel,
It is easy to recognize the gut surface, and a flat surface perpendicular to the gut surface is formed at the part where the finger hits.Next, when viewed from the direction perpendicular to the gut surface, the overall shape of the throat is not a gentle curve, A racket that has been devised so as to be advantageous for handling and maintenance of the racket in various plays, by providing protrusions on the bump that hangs. 3. Regarding the gut suspension of the racket having the throat according to claims 1 and 2, Japanese Patent Application No. 7-531.
In view of No. 46, the prepared hole is completely eliminated, and the gut suspension is made up of only one component. When the gut suspension is viewed from the direction perpendicular to the gut surface with respect to the height position with respect to the frame height. , A racket in which the gut suspension is placed at the highest position of the frame over the entire circumference within the range of the height of the frame, and the width of the gut surface is maximized in a given frame. 4. Regarding the gut suspension portion of the racket having the throat according to claims 1 and 2, Japanese Patent Application No. 7-531.
In view of No. 46, the prepared hole is completely eliminated, and the gut suspension is made up of only one component. When the gut suspension is viewed from the direction perpendicular to the gut surface with respect to the height position with respect to the frame height. , A racket in which the gut suspensions are arranged so that the overall shape of the gut suspensions is as close to a rectangle as possible within the height of the frame, so that there are as many guts of equal length as possible. The gut suspension part of the racket is within the height of the frame, and at the frame top and yoke, and both side protruding parts,
The height of the gut suspension is gradually changed in each part of the frame so that the opposite suspension is parallel and formed as long as possible in a straight line. Curve or Japanese Patent Application 7-? ? ?
? ? In view of this, the gut suspension has a step. Therefore, the gut suspension part is arranged at the lowest position at the frame top and the center of the yoke, and at the most overhanging parts of both side projections. Highest placed. In addition, of course, the frame constituent parts other than the gut suspension part in the frame cross section are
It may be a pipe or a plate, but it is characterized by arbitrarily changing the inclination of the frame side surface with respect to the gut surface at each part of the frame so that the frame side surface is advantageous for the arrangement of the gut suspension part. Composed. For example, it is configured that all the side surfaces are planes parallel to the gut surface, or, in the frame top, the V open upwards.
It is character-shaped and has a feature that it has an inverted V-shape frame structure near the frame top corner and the throat tunnel. Further, the height itself of the frame may be configured so that the height of each part of the frame is changed so that the gut suspension portion is as rectangular as possible. Further, in the vicinity where the gut suspension is located at the lowest or highest position, the gut suspension is formed by a relatively long straight line. In order to prevent such deformation, in order to prevent this, any number of "reinforcing bridges" that connect the inner side surfaces of the frame to each other and the gut suspension parts are located at an advantageous position between the gut holes and the gut holes. May be provided in the. In this way, the overall shape seen from the direction perpendicular to the gut surface of the frame is not rectangular at all, while having a preferable curvature,
A racket whose substantial gut surface is formed into a shape that is as close to a rectangle as possible. It should be noted that such a high and low arrangement of the gut suspension portion is also a claim even in a frame having a prepared hole. 5. Regarding the frame cross-sectional shape of the racket according to claims 3 and 4 around the position where the gut suspension is located at the highest position, the inner surface of the frame is directed downward from the gut outlet to the gut surface. When the gut surface is concave when hitting in the vicinity of the frame when it forms a gentle trumpet-like curved surface with a flared end, or when the frame edge is curved so that it protrudes toward the gut surface side. A racket that is configured so that the gut that exits from it can gently contact the inner surface of the frame, and has a cross-sectional shape that does not cause the gut to bend sharply when the gut actually contacts the inner surface of the frame. 6. The gut suspension of the racket according to claim 4, wherein the gut suspension is arranged at the lowest position, and the gut suspension projects toward the lowest position of the frame height, that is, the gut surface. In this position, the cross section of the gut suspension portion is just a letter U shape of the alphabet, and the gut hole is a U shape cut by the thickness of the gut. ? ? ? ? In view of the above, a racket configured such that the gut can be displaced by the U-shaped suspension portion when the gut surface is recessed when hitting near the frame.