Shake-hand style table tennis racket and component attached to the same

Abstract

To provide technique for properly assisting a way of gripping of a shake-hand style table tennis racket.SOLUTION: A shake-hand style table tennis racket comprises: a plate-shaped body plate part which has a plate surface including a rubber region covered with rubber, and an extension region extending to a rear end side relative to the rubber region; a rod-shaped grip part which is gripped by a user and which is coupled to the body plate part in a state in which a tip end part of which enters the extension region; and at least one of a thick part which is adjacent to the tip end part of the grip part in the extension region, and protrudes in a thickness direction relative to the rubber region for forming a step difference which is adjacent to an end face of the rubber covering the rubber region, and a salient part to which the thumb of the user contacts when the user grips the racket in a shake-hand style gripping way.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a shake-hand style table tennis racket and attachment parts thereof. [Background technology]

[0002] Generally, table tennis rackets are broadly classified into penholder-type and shakehand-type rackets. Penholder-type rackets have a structure suitable for holding the racket with fingers hooked on the grip like holding a pen, while shakehand-type rackets have a structure suitable for holding the racket with the grip gripped like shaking hands.

[0003] Whether the racket is held in a penholder style or a shake-hand style, it is important to hold the racket in a correct manner in order to improve basic table tennis skills. For this reason, various techniques have been proposed for assisting the user in holding a table tennis racket. For example, the following Patent Document 1 discloses a technique for forming protruding portions on the blade of a penholder style racket that function as support portions for the fingertips, so that the user can hold the racket more stably and firmly. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2023-505618 Summary of the Invention [Problem to be solved by the invention]

[0005] As explained in the above Patent Document 1, the shake-hand style racket allows the player to grip the rod-shaped grip tightly with multiple fingers, and is generally recognized as being easier to hold stably and easier for beginners to use than the penholder style racket. For this reason, there has not been sufficient effort put into helping players grip the shake-hand style racket.

[0006] However, the inventor of the present invention found that, while repeatedly teaching table tennis players, in the case of the shake-hand style, force is easily applied to the hand holding the racket during play, and the position of the fingers on the racket is also easily changed, which affects the player's play and physical fatigue. The technology disclosed herein is based on unique findings obtained in such teaching situations, and aims to provide a technology that can more appropriately assist the user in holding a shake-hand style table tennis racket. [Means for solving the problem]

[0007] The technology of the present disclosure can be realized in the following forms.

[0008] [First Form] The first form is provided as a shake-hand style table tennis racket. The table tennis racket of the first form is provided with a flat main body plate portion having a plate surface including a rubber area covered by rubber and an extension area extending from the rubber area toward the rear end side, a rod-shaped grip portion held by a user and connected to the main body plate portion with its tip portion inserted into the extension area, and a thickened portion provided next to the tip portion of the grip portion in the extension area, protruding in the thickness direction beyond the rubber area and forming a step adjacent to the end surface of the rubber covering the rubber area. According to the first form of shake-hand type table tennis racket, the thickened portion can prevent the formation of a step on the end surface of the rubber on the plate surface of the main body plate. This prevents the formation of a gap between the racket and the user's hand, allowing the user to hold the racket in a more stable state. This prevents the user from consciously or unconsciously applying extra force to the hand holding the racket during play, and prevents extra load from being applied to the user's arm muscles during play. By preventing extra force from being applied to the arm, the user can move the arm more flexibly, improving the accuracy of play. It can also reduce fatigue remaining in the user's arms, shoulders, etc. after play.

[0009] [Second form] In the table tennis racket described in the first form above, when the surface of the main body plate portion on which the user's thumb is placed when the user holds the racket in a shake-hand style is defined as a first surface, and the surface on which the user's index finger is placed is defined as a second surface, the thickened portion may include at least a first surface thickened portion that is positioned under the user's thumb on the first surface. According to the second form of table tennis racket, the first surface thickening portion can prevent a step from occurring on the end surface of the rubber under the thumb, and can prevent a gap from occurring between the thumb and the first surface. This prevents the user from exerting too much force on the thumb or moving the position of the thumb during play. This can further improve the accuracy of the user's play. In addition, the fatigue remaining in the user's arms, shoulders, etc. after play can be further reduced.

[0010] [Third Form] In the table tennis racket described in the first or second form above, when the surface of the main body plate portion on which the user's thumb is placed when the user holds the racket in a shake-hand style is defined as a first surface and the surface on which the user's index finger is placed is defined as a second surface, the thickened portion may include a second surface thickened portion that is positioned under the base of the index finger on the second surface. According to the third form of table tennis racket, the second surface thickening portion can prevent a step from occurring on the end surface of the rubber under the base of the index finger, and can prevent a gap from occurring between the index finger and the second surface. This prevents the user from exerting too much force on the index finger or moving the position of the index finger during play. This can further improve the accuracy of the user's play. In addition, it can further reduce fatigue remaining in the user's arms, shoulders, etc. after play. If both the first thickening portion and the second thickening portion are provided, the occurrence of a gap between the racket and the user's hand is further prevented, allowing the user to hold the racket in a more stable state. This can provide even greater effectiveness.

[0011] [Fourth Form] The table tennis racket according to any of the first, second and third forms may be provided with a protrusion at the tip of the grip for the user to hook his / her thumb when the user holds the racket in a shake-hand style. According to the fourth form of table tennis racket, the convex portion functions as a thumb positioning portion, so that the user can easily play with the racket in a more appropriate grip. Also, the convex portion prevents the user from bending the thumb away from the rubber while playing, so that the thumb position on the racket becomes inappropriate, and the controllability of the racket is prevented from decreasing.

[0012] [Fifth Form] The fifth form is provided as a shake-hand style table tennis racket. The fifth form of table tennis racket is provided with a flat main body plate having a plate surface including a rubber area covered with rubber and an extension area extending rearward from the rubber area, a rod-shaped gripping part to be held by a user and connected to the main body plate with its tip inserted into the extension area, and a protrusion provided at the tip of the gripping part on which the user's thumb can be hooked when the user holds the racket in a shake-hand style. According to the fifth form of table tennis racket, the convex portion functions as a thumb positioning portion, so that the user can easily play with the racket in a more appropriate grip. Also, the convex portion prevents the user from bending the thumb away from the rubber while playing, so that the thumb position on the racket becomes inappropriate, and the controllability of the racket is prevented from decreasing.

[0013] [Sixth Form] The sixth form is provided as an attachment part to be attached to a shake-hand style table tennis racket. The table tennis racket comprises a flat main body plate having a plate surface including a rubber area covered by rubber and an extension area extending rearward from the rubber area, and a rod-shaped grip part to be held by a user, the tip of which is connected to the main body plate with the tip part inserted into the extension area. The attachment part of the fifth form has a thickened part that is disposed next to the tip of the grip part in the extension area and forms a step adjacent to the end face of the rubber that covers the rubber area. According to the attachment part of the sixth embodiment, the racket can be easily provided with a thickening portion that increases the thickness of the extension region. If a thickening portion is provided on a shake-hand type table tennis racket, it is possible to prevent a step from being formed on the end surface of the rubber on the plate surface of the main body plate. This prevents a gap from being formed between the racket and the user's hand, allowing the user to hold the racket in a more stable state. This prevents the user from consciously or unconsciously applying extra force to the hand holding the racket during play, and prevents extra load from being applied to the muscles of the user's arm during play. By preventing extra force from being applied to the arm, the user can move the arm more flexibly, improving the accuracy of play. It is also possible to reduce fatigue remaining in the user's arms, shoulders, etc. after play.

[0014] [Seventh Form] In the mounting part of the sixth form, when the surface of the main plate portion on which the user's thumb is placed when the user holds the device in a shake-hand style is defined as a first surface, and the surface on which the user's index finger is placed is defined as a second surface, the thickened portion may include at least a first surface thickened portion that is positioned under the user's thumb on the first surface. According to the seventh embodiment of the mounting part, the first surface thickening portion can be easily provided on the first surface side. If the first surface thickening portion is provided on the first surface side of the racket, it is possible to prevent a step from being created on the end surface of the rubber under the thumb, and to prevent a gap from being created between the thumb and the first surface. This prevents the user from exerting too much force on the thumb or moving the position of the thumb during play. This can further improve the accuracy of the user's play. In addition, it is possible to further reduce fatigue remaining in the user's arms, shoulders, etc. after play.

[0015] [Eighth Form] In the mounting part described in the sixth or seventh form above, when the surface of the main plate portion on which the user's thumb is placed when the user holds the device in a shake-hand style is defined as a first surface and the surface on which the user's index finger is placed is defined as a second surface, the thickened portion may include a second surface thickened portion that is positioned under the base of the index finger on the second surface. According to the attachment part of the eighth embodiment, the second surface thickening portion can be easily provided on the second surface side of the racket. If the second surface thickening portion is provided on the racket, it is possible to prevent a step from occurring on the end surface of the rubber under the base of the index finger, and to prevent a gap from occurring between the index finger and the second surface. Therefore, it is possible to prevent the user from exerting too much force on the index finger or moving the position of the index finger during play. This can further improve the accuracy of the user's play. In addition, it is possible to further reduce fatigue remaining in the user's arms, shoulders, etc. after play. If both the first thickening portion and the second thickening portion are provided, it is possible to further prevent a gap from occurring between the racket and the user's hand, allowing the user to hold the racket in a more stable state. Therefore, it is possible to obtain an even higher effect.

[0016] [Ninth Form] The mounting part according to any one of the sixth, seventh and eighth forms may further have a protrusion disposed on the tip of the gripping portion for the user's thumb to hook when the user holds the gripping portion in a handshake style. According to the attachment part of the ninth embodiment, a protrusion on which the thumb can be hooked can be easily provided on the table tennis racket. If the racket is provided with a protrusion, the protrusion functions as a thumb positioning portion, making it easier for the user to hold the racket in a more appropriate manner. In addition, the protrusion prevents the user from bending the thumb away from the rubber while playing, preventing the thumb from being positioned in an inappropriate position on the racket and reducing the controllability of the racket.

[0017] [10th Form] The mounting part according to any one of the 6th, 7th, 8th and 9th forms may have a grip portion component that is integrally connected to the thickened portion and forms part of the grip portion. According to the attachment part of the tenth embodiment, the thickened portion and the grip portion are integrally connected, so that the shake-hand type table tennis racket can be easily fitted to the user's hand. Also, the thickened portion can be prevented from separating from the grip portion and falling off the racket. Furthermore, the manufacturing of table tennis rackets having the thickened portion can be simplified, and the manufacturing efficiency can be improved.

[0018] [Eleventh Form] The eleventh form is provided as an attachment part to be attached to a shake-hand style table tennis racket. The table tennis racket comprises a flat main body plate part having a plate surface including a rubber area covered with rubber and an extension area extending rearward from the rubber area, and a rod-shaped grip part to be held by a user, the tip of which is connected to the main body plate part with the tip part inserted into the extension area. The attachment part of the eleventh form is disposed on the tip of the grip part and has a protrusion on which the thumb of the user can be hooked when the user holds the table tennis racket in a shake-hand style. According to the attachment part of the eleventh embodiment, a protrusion on which the thumb can be hooked can be easily provided on the table tennis racket. With a racket having a protrusion, the protrusion functions as a thumb positioning portion, making it easier for the user to play with the racket in a more appropriate grip. Furthermore, by providing the racket with a protrusion, the user is prevented from bending the thumb away from the rubber during play, which prevents the thumb from being positioned in an inappropriate position on the racket and thus reduces the controllability of the racket.

[0019] [Twelfth Mode] The attachment part according to the eleventh mode may have a grip portion forming portion that is integrally connected to the protrusion and that forms a part of the grip portion. According to the attachment part of the twelfth embodiment, the convex portion and the grip portion are integrally connected, so that the shake-hand type table tennis racket can easily fit in the user's hand. Also, the convex portion can be prevented from separating from the grip portion and falling off the racket. This facilitates the manufacture of table tennis rackets having convex portions, and improves manufacturing efficiency.

[0020] The technology disclosed herein can be realized in various forms other than the shake-hand type table tennis racket and its attachment parts, for example, in the form of a manufacturing method for a table tennis racket, a manufacturing method for attachment parts, a processing method for a table tennis racket, a processing method for attachment parts, a manufacturing device for a table tennis racket, a manufacturing device for attachment parts, etc. [Brief description of the drawings]

[0021] [Figure 1] 1 is a schematic perspective view of a table tennis racket according to a first embodiment. [Diagram 2] 1 is a schematic plan view of a table tennis racket. [Diagram 3] FIG. 1 is a first schematic side view of a table tennis racket. [Figure 4] FIG. 2 is a second schematic side view of a table tennis racket. [Diagram 5] FIG. 4 is a schematic perspective view showing an auxiliary part on the first surface side. [Figure 6] FIG. 4 is a schematic plan view showing an auxiliary part on the first surface side. [Figure 7] FIG. 4 is a schematic perspective view showing an auxiliary part on the second surface side. [Figure 8] A first schematic diagram showing the handshake grip. [Figure 9] A second schematic showing the handshake grip. [Figure 10] FIG. 2 is a schematic perspective view showing an example of a racket base plate. [Figure 11] FIG. 11 is a schematic perspective view showing a first attachment part according to a second embodiment. [Figure 12] FIG. 11 is a schematic perspective view showing a second attachment part according to a second embodiment. [Figure 13] FIG. 11 is a schematic perspective view showing the configuration of a first face side of a table tennis racket according to a third embodiment. [Figure 14] FIG. 11 is a schematic perspective view showing the configuration of a second face side of a table tennis racket according to a third embodiment. [Figure 15] FIG. 13 is a schematic perspective view showing an auxiliary part according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] 1. First embodiment: The configuration of a shake-hand type table tennis racket 10 of the first embodiment will be described with reference to Figs. 1 to 9. Hereinafter, the table tennis racket 10 will also be simply referred to as "racket 10." Although Figs. 1 to 9 show a configuration for right-handed people, the table tennis racket 10 and the attachment parts 50a, 50b described below may be configured for left-handed people. The same applies to the second, third, and fourth embodiments, which will be described later, and other embodiments.

[0023] 1-1.Outline of racket configuration: First, reference will be made to Figures 1 to 4. Figure 1 is a schematic perspective view showing the first surface 12a side of a racket 10. Figure 2 is a schematic plan view showing the first surface 12a side of a racket 10. Figure 3 is a schematic side view of a racket 10. Figure 4 is a schematic side view showing the side of a racket 10 opposite to that shown in Figure 3.

[0024] 1 to 4, arrows indicating the X-direction, Y-direction, and Z-direction, which are directions related to the racket 10, are shown. The X-direction, Y-direction, and Z-direction are mutually perpendicular. The X-direction and Y-direction are directions along the hitting surface of the racket 10, the X-direction corresponds to the width direction of the racket 10, and the Y-direction corresponds to the length direction of the racket 10. For convenience, in this specification, the Y-direction side in the length direction of the racket 10 is called the "front end side," and the opposite side of the Y-direction is called the "rear end side." The Z-direction corresponds to the thickness direction of the racket 10. The arrows indicating the X-direction, Y-direction, and Z-direction are also shown in the figures to be referred to later in a manner corresponding to FIGS. 1 to 4.

[0025] As shown in Figures 1 to 4, the racket 10 has a flat body plate 12 having a plate surface that forms a ball-striking surface, and a rod-shaped grip part 15 connected to the rear end of the body plate 12. As shown in Figures 2 to 4, the central axis CX of the racket 10 is parallel to the Y direction. The central axis CX of the racket 10 coincides with the central axis HX of the grip part 15.

[0026] As shown in Figures 1 to 4, the racket 10 of this embodiment is provided with an auxiliary part 20 for assisting the user in holding the racket in a shake-hand style. In each figure, the auxiliary part 20 is hatched with halftone dots. In the following, the main body plate part 12 and the grip part 15 will be described first, and then the auxiliary part 20 will be described.

[0027] The main body plate 12 is also called a blade and has a substantially disk-like shape. The two plate surfaces of the main body plate 12 are called a first surface 12a and a second surface 12b. The first surface 12a corresponds to a so-called forehand surface, and the second surface 12b corresponds to a so-called backhand surface. When the racket 10 is held in a shake-hand style as shown in Figs. 8 and 9, which will be referred to later, the surface on which the thumb is placed is the first surface 12a, and the surface on which the index finger is placed is the second surface 12b.

[0028] A rubber RB is attached to each of the first surface 12a and the second surface 12b of the racket 10. The rubber RB is a resin sheet member that covers the hitting surface. The thickness of the rubber RB is, for example, about 1 to 4 mm. The rubber RB has a rubber layer made of rubber. The rubber RB may have a sponge layer on the surface that is bonded to the main plate portion 12. The type of the rubber RB is not particularly limited, and may be so-called inverted rubber, top rubber, high-grain rubber, single rubber, or anti-rubber. The thickness and type of the rubber RB may be different between the first surface 12a and the second surface 12b. The thickness and type of the rubber RB attached to the racket 10 can be selected by the user.

[0029] Each of the first surface 12a and the second surface 12b has a rubber region 13 on the tip side where the rubber RB is arranged, and an extension region 14 extending from the rubber region 13 to the rear end side. The rubber region 13 and the extension region 14 are separated by a linear boundary along the X direction. The rubber region 13 occupies approximately 80 to 90% of the area of ​​the first surface 12a and the second surface 12b. The gripping portion 15 is connected to the extension region 14.

[0030] The grip portion 15 is a portion that is held by the user and is also called a grip. The grip portion 15 has a straight rod shape along the Y direction. The grip portion 15 has a substantially elliptical cross section with the major axis in the X direction so that the user can easily hold it with multiple fingers. In this embodiment, the grip portion 15 has a configuration in which the thickness increases toward the rear end.

[0031] The grip portion 15 has a tip portion 16 that is inserted into the extension region 14 of the main body plate portion 12. In this embodiment, the tip portion 16 of the grip portion 15 protrudes in the thickness direction at the center in the X direction of the extension region 14 and extends to the boundary with the rubber region 13.

[0032] As shown in FIG. 1, FIG. 3, and FIG. 4, the racket 10 includes a racket base plate 18. The entire racket base plate 18 is shown in FIG. 10, which will be referred to in the second embodiment. The racket base plate 18 is a flat plate-like member arranged in the center in the thickness direction, and has a portion that constitutes the main plate portion 12 and a portion that constitutes the center portion in the thickness direction of the grip portion 15. The racket base plate 18 may be formed in a single phase, for example, by a single sheet of wood, or may be formed in multiple layers by plywood laminated in the thickness direction. The layers of the plywood may include layers of materials other than wood, such as carbon. The grip portion 15 is formed in a rod shape by bonding plate-like members having a semi-elliptical cross section to both sides of the portion that constitutes the grip portion 15 of the racket base plate 18.

[0033] When the racket 10 is used, a side tape may be applied to the side surface of the main plate portion 12, also called the edge, to protect the rubber RB and the main plate portion 12. Grip tape may be wrapped around the grip portion 15. The user may appropriately select whether or not to use a side tape or grip tape, and the type of side tape or grip tape to be used.

[0034] 1-2. Configuration of auxiliary parts: The configuration of the auxiliary part 20 provided on the racket 10 will be described with reference to FIGS.

[0035] FIG. 5 is a schematic perspective view showing the auxiliary part 20 provided on the first surface 12a side of the racket 10. FIG. 6 is a schematic plan view of the auxiliary part 20 provided on the first surface 12a side when viewed along the Z direction. FIG. 7 is a schematic perspective view showing the auxiliary part 20 provided on the second surface 12b side. In FIGS. 5 to 7, the racket 10 is shown in a state where the rubber RB is not attached. FIGS. 8 and 9 are each a schematic view showing a way of holding the racket 10 in a shake-hand style. FIG. 8 shows the first surface 12a side of the racket 10 when the user holds it in a shake-hand style, and FIG. 9 shows the second surface 12b side of the racket 10 when the user holds it in a shake-hand style.

[0036] In this embodiment, the auxiliary part 20 is provided in the extension region 14 of the first surface 12a and the second surface 12b of the main body plate part 12. As described below, in this embodiment, the auxiliary part 20 is formed by attachment parts 50a, 50b joined to the main body plate part 12 and the grip part 15. Since the auxiliary part 20 constitutes the part of the racket 10 that comes into direct contact with the user's fingers, it is preferable that the auxiliary part 20 is formed by a smooth curved surface as a whole so that it fits comfortably in the user's hand.

[0037] The auxiliary part 20 is made by, for example, cutting wood. Wood is preferable because it is lightweight and easy to process. Wood also has excellent moisture absorption properties and fits comfortably in the user's hand. Note that the auxiliary part 20 may contain clay or resin material in part within the allowable range previously determined by official regulations, etc.

[0038] 1-2-1.Thickened section: The auxiliary portion 20 has a thickened portion 22 that protrudes in the thickness direction beyond the surface of the rubber region 13. The thickened portion 22 is provided in the extension region 14, adjacent to the tip portion 16 of the gripping portion 15 in the width direction. The thickened portion 22 has a first surface thickened portion 22a provided on the first surface 12a shown in Fig. 5 and Fig. 6, and a second surface thickened portion 22b provided on the second surface 12b shown in Fig. 7.

[0039] As shown in Fig. 7, the first surface thickened portion 22a and the second surface thickened portion 22b are provided so as to sandwich the extension region 14 of the main body plate portion 12 in the thickness direction. As shown in Figs. 8 and 9, when a user holds the racket 10 in a shake-hand style, the first surface thickened portion 22a is positioned under the thumb, and the second surface thickened portion 22b is positioned under the base of the index finger. Hereinafter, when there is no need to particularly distinguish between the first surface thickened portion 22a and the second surface thickened portion 22b, they will simply be referred to as "thickened portion 22."

[0040] 5 and 7, the thickened portion 22 forms a step 23 adjacent to the end face of the rubber RB covering the rubber region 13. If the thickened portion 22 is provided, the formation of a step on the end face of the rubber RB on the plate surface of the main body plate portion 12 is suppressed, and the occurrence of a gap between the user's finger placed on the rubber RB and the extension region 14 of the main body plate portion 12 is suppressed.

[0041] If the racket 10 is provided with the first surface thickened portion 22a, the formation of a gap between the thumb and the extension region 14 of the racket base plate 18 is suppressed. If the racket 10 is provided with the second surface thickened portion 22b, the formation of a gap between the base of the index finger and the extension region 14 of the racket base plate 18 is suppressed. If the racket 10 is provided with both the first surface thickened portion 22a and the second surface thickened portion 22b, the formation of a gap between the user's hand and the extension region 14 of the main plate portion 12 is further suppressed.

[0042] According to the knowledge gained by the inventor of the present invention while instructing table tennis players, when the gap between the user's fingers and the racket 10 becomes larger, the user tends to consciously or unconsciously increase the force applied to the fingertips in order to stabilize the racket 10 during play. In addition, when the force applied to the fingertips when holding the racket 10 becomes large, the muscles of the forearm become stiff, the range of motion of the arm joint becomes narrow, and the user is likely to be unable to perform adequately during play. Furthermore, the user is likely to be left with severe muscle fatigue in the arms, shoulders, etc. after playing.

[0043] On the other hand, if the thickened portion 22 is provided on the racket 10 and the gap between the user's fingers and the extended area 14 of the racket 10 is reduced, the user can hold the racket 10 in a stable state with less force. This prevents the user from applying extra force to the fingertips during play, and prevents the user's arms from becoming stiff during play. This allows the user to move their arms more flexibly during play, improving the accuracy of play. In addition, it also reduces muscle fatigue that remains in the user's arms, shoulders, etc. after play.

[0044] It is preferable that the height of the step 23 formed by the thickened portion 22 is approximately the same as the thickness of the rubber RB. In this way, it is possible to prevent a step from being formed between the thickened portion 22 and the rubber RB. This further prevents the user from feeling discomfort from such a step with the fingertips resting on the racket 10 during play, and from unconsciously changing the position of the fingers or applying excessive force to the fingertips, thereby improving the accuracy of the user's play.

[0045] It is preferable that the thickened portion 22 is formed so that no gap is formed between the end face of the rubber RB. If a gap is formed between the thickened portion 22 and the end face of the rubber RB, the user may feel discomfort in the gap with the fingertips, and may unconsciously change the position of the fingers or apply extra force to the fingertips, which may affect the play. However, the end face of the rubber RB and the step 23 of the thickened portion 22 adjacent thereto do not need to be in complete contact, and even if a small gap of a few mm is formed, for example, it is acceptable.

[0046] 1-2-2.Convex part: As shown in Fig. 5, auxiliary portion 20 has a protrusion 25 provided on tip 16 of grip portion 15 of first surface 12a. Protrusion 25 is formed so as to protrude in the thickness direction at tip 16 of grip portion 15. As shown in Fig. 8, protrusion 25 functions as a portion for hooking the thumb when the user holds racket 10 in a shake-hand style.

[0047] As shown in Fig. 6, the protrusion 25 is formed over the entire width of the tip 16 of the grip 15, and is formed to extend in an oblique direction with respect to the central axis HX of the grip 15 so as to fit the thumb of the user. As shown in Figs. 5 and 6, the protrusion 25 has a first inclined surface 26a facing the rubber region 13 and a second inclined surface 26b facing the opposite side to the first inclined surface 26a. In addition, the protrusion 25 has a ridge 27 formed between the first inclined surface 26a and the second inclined surface 26b.

[0048] As shown in Fig. 5, the first inclined surface 26a is preferably configured as a curved surface that is slightly recessed toward the rear end so that the pad of the thumb can easily contact the first inclined surface 26a without causing discomfort to the user. Also, as shown in Fig. 6, the ridge 27 is preferably curved so as to recess toward the direction where the thumb contacts the ridge 27 and extends in an oblique direction with respect to the central axis CX of the grip 15.

[0049] 6, when viewed in the thickness direction of the racket 10, the inclination angle of the convex portion 25 with respect to the central axis HX of the grip portion 15 is preferably about 30 to 60°, and more preferably 40 to 50°. When viewed in the thickness direction of the convex portion 25, the intersection angle θ between the ridge portion 27 and the central axis HX of the grip portion 15 is preferably within a range of 30 to 60°, and more preferably within a range of 40 to 50°. The intersection angle θ is the smaller angle between the tangent of the ridge portion 27 that passes through the intersection point between the ridge portion 27 and the central axis HX and the central axis HX.

[0050] Generally, when playing with a shake-hand grip, by moving the position of the thumb, it becomes easier to switch between a forehand form in which the ball is hit with the first surface 12a and a backhand form in which the ball is hit with the second surface 12b, and to adjust the angle of the hitting surface of the racket 10. However, according to the knowledge of the inventor of the present invention, if the thumb placed on the racket 10 moves too far toward the rear end, the load on the muscles of the user's forearm may increase, and the switching between the forehand and backhand forms may be hindered. Therefore, if the convex portion 25 is provided on the racket 10, it is possible to prevent the user from unconsciously moving the thumb too far toward the rear end during play. Therefore, the load on the muscles of the forearm can be reduced. In addition, it is possible to prevent the switching between the forehand and backhand forms from being hindered.

[0051] Convex portion 25 is preferably configured to have a height such that ridge 27 is located in the center of the width of the thumb when the user places the thumb on it. If convex portion 25 is too high, the contact area of ​​the user's thumb increases, and the angle of the hitting surface of racket 10 is likely to fluctuate due to the force that convex portion 25 receives from the thumb, increasing the possibility of a decrease in the accuracy of the user's play.

[0052] Moreover, the inventor of the present invention, by trying various shapes of the protrusion 25 in actual play, found that it is more preferable for the protrusion 25 to have the following configuration. As shown in FIG. 6, when the racket 10 is viewed in the thickness direction, it is preferable that the ridge 27 of the protrusion 25 extends from the gripping portion 15 toward the rubber region 13 while drawing a curve, and reaches the boundary of the rubber region 13. In this case, it is more preferable that the width b of the second inclined surface 26b at the boundary between the rubber region 13 and the extension region 14, that is, the width b in the X direction between the side end of the protrusion 25 on the second inclined surface 26b side and the ridge 27, is about 20 to 40% of the width a of the tip 16 of the gripping portion 15. It is even more preferable that the width b is about 25 to 35% of the width a. This configuration of the protrusion 25 allows the thumb to be positioned in a more appropriate position, and the accuracy of the user's play can be further improved.

[0053] 1-2-3. Installation parts: In this embodiment, the auxiliary part 20 is composed of a first attachment part 50a in which the first-surface thickened part 22a and the protrusion 25 are integrated and disposed on the first surface 12a, and a second attachment part 50b constituting the second-surface thickened part 22b disposed on the second surface 12b. If the auxiliary part 20 is composed of the attachment parts 50a and 50b, the auxiliary part 20 can be easily attached to a ready-made racket, facilitating the manufacture of the racket 10. In addition, by replacing the attachment parts 50a and 50b, the auxiliary part 20 can be easily shaped to fit the user's hand better.

[0054] According to the first attachment part 50a in which the first surface thickened portion 22a and the convex portion 25 are integrated, it is easy to simultaneously provide the first surface thickened portion 22a and the convex portion 25 on the racket 10. Furthermore, if the first surface thickened portion 22a and the convex portion 25 are integrated, it is possible to prevent the formation of a portion that causes discomfort to the user at the boundary between the first surface thickened portion 22a and the convex portion 25. Furthermore, it is possible to prevent only the convex portion 25 that receives the force from the thumb from falling off the racket 10.

[0055] 1-3. Summary of the first embodiment: As described above, according to the racket 10 of the first embodiment, the auxiliary part 20 including the thickened part 22 and the convex part 25 can properly assist the user in holding the racket in a shake-hand style during play, thereby improving the accuracy of the user's play. In addition, the user's muscle fatigue after play can be reduced. Furthermore, in the first embodiment, the auxiliary part 20 is composed of the attachment parts 50a, 50b, so that the auxiliary part 20 can be easily attached to the racket 10.

[0056] 2. Second embodiment: Attachment parts 50Aa, 50Ab of a shake-hand type table tennis racket as a second embodiment will be described with reference to Fig. 10 to Fig. 12. Fig. 10 shows an example of a racket base plate 18 to which the attachment parts 50Aa, 50Ab of the second embodiment are attached. Fig. 12 and Fig. 13 each show an example of the attachment parts 50Aa, 50Ab of the second embodiment.

[0057] Please refer to Figure 10. The racket base plate 18 described in the first embodiment is a main component constituting the main body of the racket and is made of a flat plate-like member. The racket base plate 18 has a first portion 18a constituting the main plate portion 12 and a second portion 18b constituting the central portion of the grip portion 15.

[0058] In the second embodiment, as described below, the racket 10 is completed by attaching the attachment parts 50Aa, 50Ab to the racket base plate 18. The attachment parts 50Aa, 50Ab are fixed to the racket base plate 18 by, for example, an adhesive. Even after the racket 10 is completed, the shape of the auxiliary part 20 can be modified by cutting so that the racket 10 fits comfortably in the user's hand.

[0059] The configuration of the attachment parts 50Aa, 50Ab of the second embodiment will be described with reference to Figures 11 and 12. Figures 11 and 12 each show a schematic diagram of how the attachment parts 50Aa, 50Ab are attached to the racket base plate 18. For convenience, in Figures 11 and 12, the areas on the racket base plate 18 to which the attachment parts 50Aa, 50Ab are fixed are hatched with diagonal lines.

[0060] Refer to Fig. 11. The first mounting part 50Aa has a first-surface thickened portion 22a and a protrusion 25 having the same configuration as described in the first embodiment. The first-surface thickened portion 22a and the protrusion 25 are integrally connected while being arranged in the X direction.

[0061] The first attachment part 50Aa further has a grip component 52. The grip component 52 is connected to the rear end side of the protrusion 25. The grip component 52 has a semi-oval cross section and is configured as a plate-like portion with the Y direction as the longitudinal direction. The grip component 52 is layered so as to cover the second portion 18b of the racket base plate 18, and configures the outer portion on the first surface 12a side of the grip portion 15 described in the first embodiment shown in FIGS. 1 to 9.

[0062] Refer to FIG. 12. The second attachment part 50Ab has a second surface thickening portion 22b having a configuration similar to that described in the first embodiment, and a gripping portion constituent portion 52 arranged on the second surface 12b side. The second attachment part 50Ab has a configuration in which the second surface thickening portion 22b is connected to the side of the tip of the gripping portion constituent portion 52 and integrated. The tip of the gripping portion constituent portion 52 of the second attachment part 50Ab has an inclined surface that slopes downward toward the rubber region 13. The gripping portion constituent portion 52 of the second attachment part 50Ab is layered so as to cover the second portion 18b of the racket base plate 18, and constitutes the outer portion on the second surface 12b side of the gripping portion 15 described in the first embodiment shown in FIG. 1 to FIG. 9.

[0063] In a racket constructed using the attachment parts 50Aa, 50Ab of the second embodiment, the auxiliary part 20 and the grip part 15 are integrated, which prevents the auxiliary part 20 from falling off the racket and increases the durability of the racket. In addition, in accordance with the attachment parts 50Aa, 50Ab of the second embodiment, the auxiliary part 20 and the grip part 15 can be simultaneously formed by fixing to the racket base plate 18, so that a racket having a similar configuration to the racket 10 described in the first embodiment can be efficiently manufactured. In addition, the attachment parts 50Aa, 50Ab of the second embodiment and a racket using them can achieve various effects similar to those described in the first embodiment.

[0064] 3. Third embodiment: The configuration of a racket 10B of the third embodiment will be described with reference to Figures 13 and 14. Figure 13 is a schematic perspective view showing the configuration of an auxiliary part 20B provided on the first surface 12a side of the racket 10B of the third embodiment. Figure 14 is a schematic perspective view showing the configuration of an auxiliary part 20B provided on the second surface 12b side of the racket 10B of the third embodiment.

[0065] The configuration of the racket 10B of the third embodiment is almost the same as that of the racket 10 described in the first embodiment, except that the racket 10B of the third embodiment is provided instead of the auxiliary portion 20 described in the first embodiment. The configuration of the auxiliary portion 20B of the third embodiment is almost the same as that of the auxiliary portion 20 of the first embodiment, except that the protruding portion 25 is omitted.

[0066] In the racket 10B of the third embodiment, the auxiliary portion 20B does not have the protrusion 25, and only has the first-side thickened portion 22a and the second-side thickened portion 22b. The first-side thickened portion 22a is formed by adding an attachment part 50Ba later, and the second-side thickened portion 22b is formed by adding an attachment part 50Bb later.

[0067] According to the racket 10B of the third embodiment, the first surface thickened portion 22a and the second surface thickened portion 22b are provided, so that the user can hold the racket 10B more stably. This prevents the user from applying unnecessary force to the fingertips resting on the racket 10B during play, and prevents the muscles of the arm holding the racket 10B from becoming stiff. This improves the accuracy of the user's play and reduces muscle fatigue remaining after the user plays. In addition, the racket 10B of the third embodiment and the attachment parts 50Ba, 50Bb According to this, it is possible to obtain the various effects described in the above embodiments.

[0068] 4. Fourth embodiment: FIG. 15 is a schematic perspective view showing the configuration of an auxiliary part 20C of a racket 10C according to the fourth embodiment.

[0069] The configuration of the racket 10C of the fourth embodiment is substantially the same as that of the racket 10 described in the first embodiment, except that the racket 10C of the fourth embodiment has the auxiliary portion 20C instead of the auxiliary portion 20 described in the first embodiment. The auxiliary portion 20C of the fourth embodiment is substantially the same as the auxiliary portion 20 described in the first embodiment, except that the auxiliary portion 20C does not have the thickened portion 22 and has only the protruding portion 25. The auxiliary portion 20C is formed by an attachment part 50C that is attached to the racket 10C. The configuration of the protruding portion 25 of the auxiliary portion 20C is substantially the same as that of the protruding portion 25 described in the first embodiment.

[0070] According to the racket 10C of the fourth embodiment, by having the convex portion 25 as the auxiliary portion 20C, it is possible to prevent the user from unconsciously moving the thumb too far toward the rear end during play. Therefore, it is possible to reduce the load on the forearm muscles. Also, it is possible to prevent the switching between the forehand and backhand forms from being hindered. Furthermore, according to the attachment part 50C of the fourth embodiment, the convex portion 25 can be easily provided on the racket 10C by retrofitting. In addition, according to the racket 10C and the attachment part 50C of the fourth embodiment, it is possible to achieve various effects described in each of the above embodiments.

[0071] 5. Other embodiments: The technology of the present disclosure is not limited to the configurations of the above-described embodiments or the configurations described as other embodiments in each embodiment, and may be modified, for example, as follows: All of the other embodiments described below are positioned as examples of forms for implementing the technology of the present disclosure, similar to the above-described embodiments.

[0072] Alternative embodiment 1: In the above first, third, and fourth embodiments, the auxiliary parts 20, 20B, and 20C may be configured as part of the racket base plate 18, instead of being configured as attached parts added later. In other words, the auxiliary parts 20, 20B, and 20C may be manufactured integrally as part of the racket base plate 18 when the racket base plate 18 is manufactured.

[0073] Alternative embodiment 2: In the above first, second, and third embodiments, the thickened portion 22 and the protruding portion 25 may be configured by separate mounting parts that are separate from each other. Also, in the above second embodiment, the grip portion constituent part 52 may be produced as a separate part that is separate from the mounting part that constitutes the auxiliary part 20. In the above second embodiment, the grip portion constituent part 52 may have a configuration in which a part is omitted, for example, constituted by only the half on the tip side.

[0074] Alternative embodiment 3: In the above first, second, and third embodiments, at least one of the first-surface thickened portion 22a and the second-surface thickened portion 22b may be omitted. Also, in the above first, second, and third embodiments, the thickened portions 22 may be formed on both sides of the tip portion 16 of the grip portion 15 so as to accommodate both right-handed and left-handed users.

[0075] Alternative embodiment 4: In the third and fourth embodiments described above, the attachment parts 50Ba, 50Bb, 50C may have a configuration in which the protrusion 25 and a part of the grip part 15 are integrated, similar to the attachment part 50Aa of the second embodiment. Also, in the fourth embodiment described above, a second surface thickened part 22b may be provided on the second surface 12b side of the racket 10C. [Explanation of symbols]

[0076] 10, 10B, 10C...table tennis racket, 12...main body plate portion, 12a...first surface, 12b...second surface, 13...rubber region, 14...extension region, 15...grip portion, 16...tip portion, 20, 20B, 20C...auxiliary portion, 22...thickened portion, 22a...first surface thickened portion, 22b...second surface thickened portion, 23...step, 25...convex portion, 26a...first inclined surface, 26b...second inclined surface, 27...ridge portion, 18...racket base, 18a...first portion, 18b...second portion, 50a, 50b, 50Aa, 50Ab, 50Ba, 50Bb, 50C...mounting part, 52...grip portion component, CX, HX...center axis, RB...rubber

Claims

1. A shake-hand style table tennis racket, A flat main body plate portion having a plate surface including a rubber region covered with rubber and an extension region extending from the rubber region toward the rear end side; A rod-shaped grip portion that is held by a user and is connected to the main body plate portion with a tip portion inserted into the extension region; a thickened portion provided adjacent to the tip of the grip portion in the extension region, protruding in a thickness direction beyond the rubber region to form a step adjacent to an end surface of the rubber covering the rubber region; A table tennis racket equipped with

2. 2. The table tennis racket according to claim 1, When the user holds the device in a shaking-hand style, the surface of the plate surface of the main body plate portion on which the thumb of the user is placed is defined as a first surface, and the surface on which the index finger of the user is placed is defined as a second surface. The thickened portion includes at least a first surface thickened portion positioned under the user's thumb on the first surface.

3. 3. The table tennis racket according to claim 2, The thickened portion further includes a second surface thickened portion positioned under the base of the index finger on the second surface.

4. A table tennis racket according to any one of claims 1 to 3, A protrusion on which the user's thumb can be hooked when the user holds the racket in a shake-hand style is provided at the tip of the grip.

5. A shake-hand style table tennis racket, A flat main body plate portion having a plate surface including a rubber region covered with rubber and an extension region extending from the rubber region toward the rear end side; A rod-shaped grip portion that is held by a user and is connected to the main body plate portion with a tip portion inserted into the extension region; A protrusion provided at a tip of the gripping portion on which the user's thumb can be hooked when the user holds the device in a shake-hand style; A table tennis racket equipped with

6. A mounting part to be attached to a shake-hand style table tennis racket, The table tennis racket comprises: a flat main body plate portion having a plate surface including a rubber region covered with rubber and an extension region extending rearward from the rubber region; and a rod-shaped grip portion to be gripped by a user, the rod-shaped grip portion being connected to the main body plate portion with a tip portion inserted into the extension region; The fitting includes a thickened portion disposed adjacent a tip of the gripping portion in the extension region and forming a step adjacent an end surface of the rubber covering the rubber region.

7. 7. The mounting part according to claim 6, When the user holds the device in a shaking-hand style, the surface of the plate surface of the main body plate portion on which the thumb of the user is placed is defined as a first surface, and the surface on which the index finger of the user is placed is defined as a second surface. The thickened portion includes at least a first surface thickened portion positioned under the user's thumb on the first surface.

8. 8. The mounting part according to claim 7, The thickened portion further includes a second surface thickened portion positioned under the base of the index finger on the second surface.

9. The mounting part according to any one of claims 6 to 8, further comprising: An attachment part that is disposed on the tip of the gripping portion and has a protrusion on which the user's thumb can be hooked when the user holds the table tennis racket in a shake-hand style.

10. 7. The mounting part according to claim 6, An attachment part having a grip portion forming portion integrally connected to the thickened portion and constituting a part of the grip portion.

11. A mounting part to be attached to a shake-hand style table tennis racket, The table tennis racket comprises: a flat main body plate portion having a plate surface including a rubber region covered with rubber and an extension region extending rearward from the rubber region; and a rod-shaped grip portion to be gripped by a user, the rod-shaped grip portion being connected to the main body plate portion with a tip portion inserted into the extension region; The attachment part is disposed on the tip of the gripping portion and has a protrusion on which the user's thumb can be hooked when the user holds the table tennis racket in a shake-hand style.

12. 12. The fitting of claim 11, An attachment part having a grip portion constituent part integrally connected to the protrusion and constituting a part of the grip portion.

Images