JP2007130406A - Tennis racket with deformed-shape structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tennis racket capable of raising repulsive force, attaining both of uniformity of repulsion property and control property, and reducing an impact and a vibration, by devising a new technology to the conventional shape, structure and function of the tennis racket. <P>SOLUTION: The shape of a face in the tennis racket is made to have projected and recessed curved lines. The grids of strings are made to be the minimum at the center part of a sweet spot, density of the grid is enlarged from the center part toward a frame, and the number of the grids is made to be the maximum in the frame part. The deformation structure includes: projected curved lines whose extension is made to be the maximum, in the frame part of the warp and weft with the minimum grid density in the vertical and horizontal directions of the face frame; and curved lines to be extended in a recessed shape in the middle and divided parts of the maximum adjacent projected shapes. An impact/vibration absorbing function is provided to the four parts with the maximum extension or to the whole frame. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tennis racket for sports equipment, and by adding ingenuity to the shape, structure, and function peculiar to the tennis racket, the tennis racket increases the repulsive force, makes the repulsion uniform and controls, The vibration is reduced.

  Conventionally, the tennis racket has almost the same string density as the tennis racket, and the face shape has been established in a tennis exercise style using a square shape, a round shape, an oval shape or the like.

  However, conventional tennis rackets have no significant changes in shape, structure, function, etc., and tend to be mannerism. The player's attractiveness and expectation to tennis are diminished. Stagnation of motivation to improve skills, etc., hard hitters and athletes pursuing powerful balls, tennis rackets with different characteristics against bipolarization of enjoyment type players who want to play tennis with health and social orientation with easy balls There are a few racket shakes and high controllability and a large sweet area and a large repulsive force, and there is a large temperature difference in the technical performance of contrasting tennis rackets. An object of the present invention is to solve these disadvantages.

  In order to solve this problem, the invention according to claim 1 optimizes the technical performance of the racket by making the face of the tennis racket a concave-convex curve and having a variable structure with a variety of the entire face. It is characterized by doing.

  In the invention of claim 2, on the various faces and face areas of the tennis racket, the center portion of the sweet spot minimizes the string eyes, and the density of the string eyes is reduced from coarse to coarse from the center portion to the frame. The length of the face frame inside the warp and weft frame part where the string eye density is the smallest and the width of the face frame inside the frame part is maximized. The maximum width of the convex curve shape and the maximum vertical and horizontal width adjacent to each other, in the middle or multiple divisions, the inner frame is a concave curve. Adapting to the density and face area of the string, the entire face and face frame has a concavo-convex curved symmetrical structure, and the string density By varying the frame shape to increase the repulsive force, increase the homogenization and control of resilience, shock, characterized by comprehensively realized relaxation oscillation.

  In addition, the invention of claim 3 has four sweet area areas where the spread is maximized on the various face and face area of the tennis racket, with the frame portion of the warp and weft having the minimum string eye density. Frames in the section or pipe inner and outer perimeter strings or sine curve or zigzag curve on the grommet surface or the entire surface, or those containing materials such as shock mitigation / vibration absorbing function or elastic material inside the frame / pipe Is provided with a frame in which four portions having a large frame width or the entire face frame are fused to reduce impact and vibration during ball impact.

  According to the present invention, the density of string eyes shifts from fine to coarse, making the resilience uniform, maintaining the repulsive force with a stable ball impact even if the sweet spot is slightly off center, and twisting of the frame etc. Suppressed, the stability of the face is increased, and competition and practice can be performed at a high skill level, improving the ability to respond and exercise, and exhibiting effective power.

  To narrow the string in the center of the sweet spot, reduce the repulsive force, and correct it, the spread of the convex curve shape in the vertical and horizontal directions of the face frame is intentionally made extremely larger than the surroundings, By adjusting the length and width, and also the width, the deflection effect of the string can be adjusted, and by increasing the deflection, the sweet spot is expanded, shock and vibration absorption are improved, and the repulsive force is increased. Since the string eyes are fine, the high controllability is maintained, so the obvious problems with the contradictory characteristics of experts and general players can be mitigated, and the distance between use is reduced. All-rounder with multi-type elements and improved racket technology performance.

  Depending on the level and request of each player, the technical performance of the racket has become a universal one, the sweet spot, the sweet spot, the sweet area, the position of the face, how to make it, the deformation that adapted according to the string density range Since the structure can be used, it is possible to select one with racket technology performance suitable for the player, increase motivation to exercise, enjoy tennis in a comfortable tension, and sustain interest Providing deep materials that can be used.

  The tennis racket having a deformed structure according to the present invention has components that can have a large performance effect and can be made smaller than the conventional face area. Since the shape of the can be configured in various deformation structures, it can be freely shaped and performed, and it is an exercise form for all classes from beginners to advanced users, so it can be used according to the level of technical skill of each person Methods and motor learning are possible.

  Four sections of the frame where the spread of the frame is maximized. The frame is bent and twisted and the string is bent at a large part. At the time of ball impact, a frame with a curved shape, or a frame / pipe containing a material that contains shock absorbing / vibration absorbing functions, elastic materials, etc., is also effectively integrated into the entire face frame. Absorbs shock and vibration. In addition, the concavo-convex curve-shaped deformation structure of the present invention is relatively easy to reduce impact and vibration during ball impact.

  Without changing the string density, it is also possible to have a constant configuration such as various fine, medium, and coarse, and the fine and medium are particularly effective. The tennis racket having a modified structure according to the present invention can be applied to badminton rackets of badminton as well as hard and soft tennis, and has a wide range of use.

  FIG. 1 is a schematic plan view of a face portion of a tennis racket having a deformed structure, where the center portion of the sweet spot minimizes the string eyes, and from the center portion to the frame, the density of the string eyes gradually increases from thin to coarse. Depending on the player's motor form, motor ability, and motor sensation, a string that can be selected in consideration of the balance of the number of strings used and the density of the eyes, etc., will be appropriately widened to maximize the string eyes in the frame. In this way, the width of the convex curve shape in the longitudinal direction and the lateral direction of the face frame inside the warp and weft frame portion where the string eye density is the smallest is maximized from the surroundings, and the longitudinal direction and A configuration in which the inner part of the frame has a concave curve at the middle or multiple divisions next to each other with the maximum lateral extension. Adapted to the density and face area of the string, the entire face and face frame is a symmetrical deformation structure with a concave and convex curve shape, and the string density, the face frame shape and area, and the vertical and horizontal spread of the convex curve shape are maximized Make the shape that can change the length and width of the limit part.

  FIG. 2 is a schematic diagram showing the shape of each face, and is not limited to this as long as the claims of the present invention are satisfied.

  Fig. 3 is a schematic cross-sectional view of the frame convex curve shape part. In the drawing, F frame pipe (ordinary part), G frame pipe (curve shape part), and H shock vibration absorption function / material are linear. Although it is actually a curved structure, the frame pipe of the section of the four sweet areas where the spread is maximized in the frame part of the warp and weft where the density of the string is the smallest. The width of the frame that includes a sinusoidal or zigzag curved frame on the grommet surface side or the entire surface side of the inner and outer strings, or a frame / pipe containing materials such as shock mitigation / vibration absorbing function, elastic material, etc. It is provided so as to constitute a frame that is a fusion of the four large portions or the entire face frame.

  The tennis racket with this deformed structure has a shape that reduces the repulsive force by narrowing the string at the center of the sweet spot, but in order to correct this, the vertical and horizontal directions of the face frame By intentionally making the convex curve spread extremely larger than the surroundings, adjusting the length and width, and also the width, the string deflection effect can be adjusted, and by increasing the deflection, the sweet spot becomes It will expand, improve shock and vibration absorption, increase the repulsive force, and the string eyes are fine, so the controllability can have high performance. Basically, the density of the string is gradually adapted to a gentle variable from fine to coarse to create a face frame spread, and the string density and the frame shape spread are synchronized. Ideally, the racket's technical performance will change according to the level and demands of each player, the sweet spot, the sweet area, the position of the sweet area, how to make it, the range of string density Etc., it becomes possible to have an adapted deformation structure. A structure in which the density of the string's eyes gradually changes from fine to coarse, making the resilience uniform, and even if the center of the sweet spot is slightly off the center, the repulsive force remains almost unchanged and the ball impact is stable. Can be held, twisting of the frame and the like is suppressed, and the stability of the face surface is enhanced.

  In the present invention, the air resistance at the time of swing is increased simply by making the inner and outer shapes into a deformed curve shape deformation structure in the form of each conventional face, so the inner and outer shapes of the uneven curve shape are synchronized and integrated. By doing so, the air resistance at the time of swing can be reduced, the face area becomes a symmetrical deformation structure of the concave and convex curve shape, the convex curve shape increases the length of the string, the concave curve shape is In order to make correction by reducing the increase in the face area at the convex part, the air resistance during the swing of the face frame and the string including the density of the eyes of the string from fine to coarse is comprehensively It is almost the same as the thing, so that there is no change. However, the tennis racket having a modified structure according to the present invention has a performance effect and includes components that can be made smaller than the conventional face area.

  Four sections of the frame where the spread of the frame is maximized. The frame is bent and twisted and the string is bent at a large part. At the time of ball impact, a frame with a curved shape, or a frame / pipe containing a material that contains shock absorbing / vibration absorbing functions, elastic materials, etc., is also effectively integrated into the entire face frame. Absorbs shock and vibration. In addition, the concavo-convex curve-shaped deformation structure of the present invention is relatively easy to reduce impact and vibration during ball impact.

  The uneven curved shape symmetrically deformed structure of the present invention can be of a constant configuration such as various fine, medium, and coarse without changing the string density. Is effective.

  The conventional face shape can also be used to change the density of string eyes from the center of the sweet spot to the face frame gradually from fine to coarse. is there.

  The present invention can also be applied to and used for badminton rackets.

  Since the tennis racket having a deformed structure according to the present invention can be industrially mass-produced, it has industrial applicability.

    Schematic plan view of the face part     Schematic of the shape of each face     Schematic sectional view of the frame convex curve shape part

Explanation of symbols

The letters and numbers in the figure are as follows.
A: Face B: Frame C: Warp Thread D: Weft E: Shaft F: Frame / Pipe (Normal)
G: Frame pipe (curved part) H: Shock vibration absorbing function / material 1: Face example 1 (deforms a conventional square shape)
2: Face example 2 (deforms a conventional round shape)
3: Face example 3 (deforms a conventional elliptical vertically moved spread)
4: Face example 4 (deforms the spread of the conventional elliptical shape moved up and down)
5: Face example 5 (deforms a conventional oval shape into a multi-concave curved shape)

Claims (3)

  A tennis racket with a deformed structure characterized by optimizing the technical performance of the racket by making the face of the tennis racket into a concave-convex curved shape and having the entire face have a variety of variable configurations.   On the various faces and face areas of the tennis racket, the center part of the sweet spot minimizes the string eyes, and the density of the string eyes is increased moderately from fine to coarse from the center to the frame. , Maximize the string's eyes in the frame part, and maximize the spread of the convex curve shape in the longitudinal and lateral directions of the face frame inside the warp and weft frame parts with the smallest string eye density The density of the eyes of the string and the face area are such that the inner part of the frame part has a concave curve shape at the middle or multiple divisions of the maximum vertical and horizontal spread. Adapts to the shape of the face and the entire face frame to a symmetrical deformation structure with a concave-convex curve, varying the string density and frame shape It allows increasing the repulsive force, the resilience of the uniform and shock, tennis racket deformation structure according to claim 1, wherein the comprehensively realized relaxation oscillation.   On the face and face of various tennis rackets, the string part of the frame and pipe inner and outer peripheries of the four sweet area sections where the spread is maximized in the frame part of the warp and weft with the smallest string density A frame with a sine curve shape or zigzag curve shape on the grommet surface side or the entire surface side, or a frame / pipe that contains materials such as shock relaxation / vibration absorbing function, elastic material, etc. 3. The tennis racket having a deformed structure according to claim 2, wherein a shock or vibration at the time of ball impact is reduced by providing a frame in which a part or face frame is fused as a whole.

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