JP2005124912A - Table tennis racket and blade for table tennis racket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blade for a table tennis racket permitting designing and disposing the sweet spot of the blade with such an area and in such a position as desired by a player. <P>SOLUTION: A blade body 105 of the blade has a three-layer structure consisting of a blade center plate 105a and a pair of blade outer plates 105b. A sweet spot position adjusting member 106 whose rigidity is lower than that of the blade body 105 is engaged and buried in a hole formed on a face of the blade center plate 105a. The sweet spot position adjusting member 106 is formed in the shape of a disk consisting of five members with different rigidity layered concentrically in such a way that the rigidity becomes gradually larger from the center toward the outer periphery of the sweet spot position adjusting member 106. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a table tennis racket blade and a table tennis racket in which a rubber and a grip are attached to the blade, and particularly to a setting structure of a sweet area.

  In general, a table tennis racket for competition is generally prepared and used by a player selecting a blade and a rubber according to their preference and bonding the selected blade and rubber with an adhesive. The blades are also required to improve the hitting performance, like the rubber.

 The performance required of the blade includes lightness, high resilience, vibration decay, etc.In particular, with the recent advancement of table tennis technology, it is required to increase the hitting force of the blade. Of these, attention is being paid to the fact that the sweet area centered around the sweet spot of the blade is provided as wide as possible and the repulsive force in the sweet area is great.

  Although a racket designed with particular attention to expanding the sweet area of the blade has not been devised, the following is an example of improving the rebound force of the blade and securing a certain sweet area: A special racket has been developed.

  Conventionally, a table tennis racket blade is generally made of a wooden plate body. For example, a plurality of thin wood plates such as cypress and paulownia are laminated and laminated, and a molded blade is known. Yes. In the above-mentioned known blades, it has been proposed that the thin wood plates constituting the blades are alternately stuck so that the grain is orthogonal to increase the sweet area.

  FIG. 5 shows a known table tennis racket blade. In the figure, 201 is a blade, and 202 is a blade intermediate plate formed of a thin wood plate that forms a central layer of the blade 201 and has a grain in a certain direction. In the blade 201, a blade intermediate plate 201a formed in the shape of a blade is arranged in the center layer of the blade 201, and the blade intermediate plate 202a is formed by a pair of blade intermediate plates 202b made of a thin wood plate having the same shape as the blade intermediate plate 201a. The blade middle plate 202 has a three-layered laminated structure.

  The blade intermediate plate 202 is disposed so that the grain direction L2 of the blade intermediate plate 202a is parallel to the longitudinal direction of the blade 201, and the blade intermediate plate 202b is aligned with the grain direction L2 of the blade intermediate plate 202b. It is stuck so as to be substantially orthogonal to the wood grain direction L1.

  Further, on both surfaces of the blade middle plate 202, a blade outer plate 203 made of a thin wood plate having a thickness smaller than that of the blade middle plate and having a grain in a certain direction is attached. The blade outer plate 203 is adhered to the blade intermediate plate 202b so that the grain direction L3 of the blade outer plate 203 is parallel to the longitudinal direction of the blade 201.

  In the known blade, in order to exert a high repulsive force, as a result of alternately laminating the wood thin plates so that the grain of the wood thin plates constituting the blades is orthogonal, the blade formed from a single plate, or the wood thin plate Compared to blades laminated in parallel to the grain direction, the sweet area could be widened.

  However, no proposal has been made to form the blade by focusing on the sweet area, and there has been a proposal to design the blade to increase the area of the sweet area or to design the blade to increase the rigidity of the sweet area. Absent.

For table tennis rackets, the maximum weight that a player can swing off easily when hitting is about 100 g considering the competition time. The upper limit of the blade thickness suitable for hitting is the size of the hand when gripping. Therefore, it is said that it is about 10 mm. On the other hand, if the blade area is too large, hitting is hindered by air resistance. Conversely, if the blade area is too small, the sweet area necessary for hitting cannot be secured, and therefore the blade area is optimally about 200 cm ² .

  In view of the above limitations such as weight, the shape of the blade is naturally about 250 mm in the longest length including the blade grip portion in the longitudinal direction of the blade and about 150 mm in the shortest length in the blade short direction. The blade face portion has an elliptical shape. Therefore, it is required to provide a racket blade that exhibits high hitting performance within the above-mentioned limited shape and weight range.

  Further, it is generally said that the optimum hitting position (hereinafter referred to as a “meet point”) of the table tennis racket is the central part of the blade face. However, due to the recent sophistication and complexity of competition techniques, the optimum meet point may not necessarily be in the center of the blade face, depending on the method of hitting the ball. Blades designed to be provided are now required.

  The first object of the present invention has been made in view of the above viewpoint, and can be designed and combined with the selection of members constituting the blade, and the area of the sweet area can be designed by the shape of the blade and the arrangement of the members. It is to provide a racket blade. Moreover, it is adjusting a hitting ball repulsion force in a sweet area.

  A second object of the present invention is to provide a blade that can be designed so as to ensure a sweet area as large as possible within the limited shape and weight.

  The third object of the present invention is to provide a blade that can be designed so that the position of the sweet spot is provided at a desired position other than the central portion of the blade face other than the central portion of the blade face.

  According to a first aspect of the present invention, there is provided a table tennis racket blade comprising a blade face portion and a blade grip portion, and a rubber is attached to the blade face portion to constitute a table tennis racket. The portion includes a blade body that forms the outer shape of the blade, and a sweet spot position adjusting member that is different in rigidity from the blade body, and the sweet spot position adjusting member is a fixed region of the blade face portion. It is characterized by being arranged in a plane.

  According to a second aspect of the present invention, the sweet spot position adjusting member is fitted and embedded in the blade body.

  According to a third aspect of the present invention, the sweet spot position adjusting member fitted and embedded in the blade body is formed in a disk shape in which a plurality of ring-shaped members are concentrically formed, And the said ring-shaped member is arrange | positioned, changing rigidity gradually toward the outer peripheral part from the said sweet spot position adjustment member center part, It is characterized by the above-mentioned.

  According to a fourth aspect of the present invention, the sweet spot position adjusting member fitted and embedded in the blade body is arranged at an arbitrary position of the blade face and the sweet spot position adjusting The member is formed of a material having a rigidity higher than that of the blade body.

  According to a fifth aspect of the present invention, the table tennis racket blade according to any one of the first to fourth aspects is provided as in the fifth aspect, and a rubber attaching surface is provided on the outer surface of the blade body. Further, a table tennis racket rubber is attached to at least one surface of the blade face part, and / or a table tennis racket grip is attached to the grip part of the blade. It is characterized by that.

  According to the first aspect of the present invention, the blade face portion includes a blade body that forms the outer shape of the blade, and a sweet spot position adjusting member that is different in rigidity from the blade body, and the sweet spot position adjustment. Since the member is arranged in a plane in a certain region of the blade face portion, it is possible to provide a portion having a large rigidity at an arbitrary position of the blade face. The sweet area can be provided in a larger area than the conventional product.

  In particular, if the sweet spot position adjusting member is arranged at the center of the blade face and is formed of a material having a rigidity smaller than that of the blade body, the rigidity of the outer periphery of the blade is increased. be able to. Further, if formed of a material having a rigidity higher than that of the blade body, the rigidity of the blade center portion can be increased, and a high-speed hitting blade having a high hitting ball repulsion force at the blade face center portion can be produced.

  According to the invention according to claim 2, in addition to the effect of the invention according to claim 1, the sweet spot position adjusting member is obtained by fitting and embedding the sweet spot position adjusting member in the blade body. Can be formed integrally with the blade body, so that the blade can be formed within the above-mentioned limited weight range and within the limited shape range. Further, the outer surface of the blade can be formed into a flat surface.

  According to the invention of claim 3, the sweet spot position adjusting member fitted and embedded in the blade body is formed in a disc shape in which a plurality of ring-shaped members are concentrically formed, and the sweet By arranging the ring-shaped member by gradually changing the rigidity from the center part of the spot position adjusting member toward the outer peripheral part, in addition to the effect of the invention according to claim 2, the rigidity difference of the blade face part is reduced. Since it is possible to form the blade face, the rigidity of the blade face can be made uniform, and the inflection point of the rigidity can be reduced, a wider sweet area can be provided, and a smooth hit can be achieved.

  In particular, if a member having a high rigidity is gradually formed from the central part of the sweet spot position adjusting member to the outer peripheral part of the blade, the rigidity of the outer peripheral part of the blade is increased, so that the area of the sweet area can be widened. In addition, if a member with small rigidity is gradually formed from the center part of the sweet spot position adjusting member to the outer peripheral part of the blade, the rigidity of the blade center part can be increased, and the hitting ball repulsive force of the blade face center part is increased. High and high speed blades can be produced.

  According to the invention of claim 4, the sweet spot position adjusting member fitted and embedded in the blade body is disposed at an arbitrary position of the blade face, and the sweet spot position adjusting member is By forming a material having a rigidity higher than that of the blade body, a position having a large rigidity can be formed at an arbitrary position of the blade face portion, and a sweet area can be provided at a desired position of the blade face. .

  In particular, when the sweet spot position adjusting member is provided near one end in the blade longitudinal direction, an attack type blade that can strike in the sweet area near one end in the blade face longitudinal direction while twisting the grip can be designed, When the sweet spot position adjusting member is provided near the front end of the blade in the lateral direction, it is possible to design a blade capable of hitting in the sweet area at the front end of the blade face.

  The present invention will be described based on an embodiment shown in the drawings. In addition, although the shape of the blade in the embodiment indicates a shake hand type for double-sided hitting, the table tennis racket is not limited to the shake hand type but can be applied to a pen holder type. Not too long.

  FIG. 1 is a table tennis racket blade showing a first embodiment of the present invention.

  The blade 101 includes a blade main body 102 and a sweet spot position adjusting member 103. The blade main body 102 has a three-layer structure in which three members of a blade middle plate 102a and a pair of blade outer plates 102b are laminated and bonded. ing.

  A sweet spot position adjusting member 103 is fitted and embedded in the face portion of the blade middle plate 102 a of the blade body 102.

  In the present embodiment, a hole as a sweet spot position adjusting member fitting portion is provided around the blade middle plate 102a face portion center point O, and the blade middle plate 102a face portion is formed in a donut shape. Has been.

  The sweet spot position adjusting member 103 is formed in a disc shape that fits into a hole formed in the blade intermediate plate 102a, and is fitted and embedded in the hole of the blade intermediate plate 102a.

  In the present embodiment, the sweet spot position adjusting member 103 is formed of a member having a specific gravity lighter than that of the blade body 102, and the blade body 102 is formed of a material having higher rigidity than the sweet spot position adjusting member 103. Has been.

  Therefore, the rigidity of the outer peripheral portion of the blade face of the blade 101 can be increased, and the sweet area SA1 can be provided widely. Furthermore, since a considerable portion of the blade can be formed by a sweet spot position adjusting member having a low specific gravity, the blade can be reduced in weight.

  In the present embodiment, the sweet spot position adjusting member 103 is arranged in an area of about 80% of the face portion of the blade 102a, and the sweet spot position adjusting member 103 is formed of a balsa material having a small rigidity. The blade body 102 is formed of a cypress material having a rigidity higher than that of the balsa material.

  Note that the sweet spot position adjusting member 103 may be formed at an arbitrary position other than the central portion without being provided at the central portion of the blade 102 face portion. Further, the blade core member 102a is not limited to being provided in an area of about 80% of the ball striking surface, and may be provided wider than 80% or narrowly.

  Further, the method for fitting and embedding the sweet spot position adjusting member is not limited to the method of forming a hole in the blade body 102, and the sweet spot position adjusting member 103 is fitted and embedded by forming a recess in the blade body 102. May be.

  Further, since the sweet spot position adjusting member 103 and the blade body 102 have a relatively large rigidity of the blade body 102 and the total weight of the blade 101 may be within about 100 g, various kinds of wood A plate body may be combined. For example, a sweet spot position adjusting member 103 may be formed of a cypress material, and a blade body 102 may be formed of a carbon nanotube sheet. Good. The blade is not limited to a three-layer structure.

  On the other hand, the sweet spot position adjusting member 103 may be formed of a material having higher rigidity than the blade body 102. In this case, the rigidity of the sweet area SA2 is locally increased, and a blade for high-speed hitting can be manufactured.

  FIG. 2 is a table tennis racket blade showing a second embodiment of the present invention. The blade 104 includes a blade body 105 and a sweet spot position adjusting member sheet 106. The blade body 105 has a three-layer structure in which three members, a blade middle plate 105a and a pair of blade outer plates 105b, are laminated and bonded. It has become.

  The blade face portion of the blade intermediate plate 105a is provided with a hole as a sweet spot position adjusting member fitting portion with the center point O as the center, and the blade intermediate plate 105a face portion is formed in a donut shape. ing. The sweet spot position adjusting member 106 is formed in a disc shape that fits into a hole formed in the blade intermediate plate 105a, and is embedded in the hole of the blade intermediate plate 105a. Furthermore, the sweet spot position adjusting member 106 is formed in a disc shape in which a plurality of ring-shaped members are concentrically formed.

  In the present embodiment, the core portion 106a of the sweet spot position adjusting member is formed of a member having a small rigidity, and the rigidity of the member gradually increases until the outer peripheral portion 106e of the sweet spot position adjusting member 106 increases. Is formed by concentrically arranging large members. Further, the blade body 105 a is formed of a member having a rigidity higher than that of the sweet spot position adjusting member 106.

  For example, the sweet spot position adjusting member 106a is made of balsa, 106b is cypress, 106c is paulownia, 106d is African, 106e is carbon fiber reinforced resin, and the blade body 105 is made of carbon nanotube reinforced resin. In addition, the rigidity is gradually increased from the center of the face of the blade middle plate 105a to the outer periphery.

 In this way, by arranging the members so as to have a rigid inclined structure in which the rigidity gradually increases toward the outer periphery of the blade 104, the rigidity of the outer periphery of the blade 104 can be increased, and the sweet area of the blade It is possible to provide a blade 104 that provides a wide SA3, has few inflection points, and exhibits uniform resilience in the sweet area.

  On the other hand, the sweet spot position adjusting member 106a is formed using a material having the maximum rigidity among the materials forming the blade intermediate plate 104, and the rigidity is gradually reduced to the outer peripheral portion 106e of the sweet spot position adjusting member 106. In addition, the blade body 105 may be formed of a member having rigidity smaller than that of the sweet spot adjusting member 106.

  For example, the sweet spot position adjusting member 106a is made of carbon nanotube reinforced resin, the blade peripheral member 106b is made of carbon fiber reinforced resin, 106c is made of African material, 106d is paulownia material, 106e is made of cypress material, and the blade body 105 is formed of a balsa material.

  In this way, by arranging the members so as to have a rigid inclined structure in which the rigidity decreases toward the outer peripheral portion of the blade 104, a high-speed impact blade having a large rigidity in the sweet area SA4 is manufactured. Can do.

  FIG. 3 is a table tennis racket blade showing a third embodiment of the present invention.

  The blade 107 includes a blade body 108 and a sweet spot position adjusting member 109. The blade body 108 has a three-layer structure in which three members, a blade middle plate 108a and a pair of blade outer plates 108b, are laminated and bonded. ing.

  The sweet spot position adjusting member 109, which has a larger rigidity and a semi-elliptical shape than the blade main body 108, is fitted and embedded in one surface divided by the longitudinal center line L0 of the blade middle plate 108a. Has been.

  Therefore, the rigidity of the face portion of the blade 107 on the side where the sweet spot position adjusting member 109 is embedded is increased, and the sweet area SA5a can be provided on the chain line L1 shifted by X1 from the center point O, and the blade is twisted while twisting the grip. An attack type blade capable of hitting in a sweet area near one end in the face longitudinal direction can be produced.

  In the present embodiment, for example, the blade body 108 is formed of a balsa material, and the sweet spot position adjusting member 109 is formed of a carbon nanotube plate having a rigidity higher than that of the balsa material.

  The sweet spot position adjusting member is not limited to being fitted and embedded near one end of the blade 107 in the longitudinal direction, and the sweet spot position adjusting member 109 may be embedded near the blade 107 in the short direction. In this case, since the sweet area SA5b is provided at the front end portion of the blade 107, a blade suitable for hitting at the front end portion of the racket can be produced.

  FIG. 4 is a table tennis racket showing a fourth embodiment of the present invention. The table tennis racket 110 is formed, for example, by sticking a table tennis racket grip 111 to the grip part of the table tennis racket blade 104 and a table tennis rubber 112 to the face part shown in FIG.

  The grip 111 and the rubber 112 may be attached to blades other than the table tennis racket blade 104 of the second embodiment shown in FIG. Further, the grip 111 and the rubber 112 may be attached to both surfaces of the blade 104.

A table tennis racket blade showing a first embodiment of the present invention. A table tennis racket blade showing a second embodiment of the present invention. A table tennis racket blade showing a third embodiment of the present invention. The table tennis racket which shows 4th embodiment of this invention. Conventional table tennis racket blade.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Table tennis racket 102 Blade body 103 Sweet spot position adjusting member 104 Table tennis racket blade 105 Blade body 106 Sweet spot position adjusting member 107 Table tennis racket blade 108 Blade body 109 Sweet spot position adjusting member 110 Table tennis racket 111 Table tennis racket grip 112 Table tennis racket rubber 201 Table tennis racket blade 202 Blade middle plate 203 Blade outer plate

Claims (5)

In a table tennis racket blade comprising a blade face part and a blade grip part, and rubber is adhered to the blade face part to constitute a table tennis racket,
The blade face portion includes a blade body that forms an outer shape of the blade, and a sweet spot position adjustment member that is different in rigidity from the blade body, and the sweet spot position adjustment member includes the blade face portion. A table tennis racket blade characterized by being arranged in a plane in a certain area. The table tennis racket blade according to claim 1, wherein the sweet spot position adjusting member is fitted and embedded in the blade body. The sweet spot position adjusting member fitted and embedded in the blade body is formed in a disc shape in which a plurality of ring-shaped members are concentrically formed, and an outer peripheral portion from the central portion of the sweet spot position adjusting member The table tennis racket blade according to claim 2, wherein the ring-shaped member is arranged with gradually changing rigidity toward the table. The sweet spot position adjusting member fitted and embedded in the blade main body is disposed at an arbitrary position of the blade face portion, and the sweet spot position adjusting member is a material having higher rigidity than the blade main body. The table tennis racket blade according to claim 1, wherein the table tennis racket blade is formed by: 5. The table tennis racket blade according to claim 1, wherein the blade body includes a thin plate having a flat surface for providing a rubber attaching surface, and is provided on at least one surface of the blade face portion. A table tennis racket characterized in that a table tennis racket rubber is stuck and / or a table tennis racket grip is stuck on the grip part of the blade.

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