racket

Abstract

The racket (100) includes: a handle portion (1); and a main body portion (2) connected with the handle portion (1). The main body portion (2) contains: a core layer (L1); a first face layer (L21); a first inner layer (L31) configured to sandwich the first face layer (L21) with the core layer (L1); and a first outer layer (L41) configured to sandwich the first inner layer (L31) with the first face layer (L21). The first inner layer (L31) is an elastomer. The first outer layer (L41) has a higher rigidity than the first inner layer (L31). The core layer (L1) has a higher rigidity than the first inner layer (L31).

Description

Technical Field

[0001] This invention relates to a racket. Background Technology

[0002] Previously, there have been rackets used for hitting balls. For example, Chinese Utility Model Patent No. 218357225 (Patent Document 1) describes a racket for pickles. In the racket described in this publication, the handle is fitted and installed at the upper end of the racket body. PE and EVA secondary high-density foam layers are fixed to the front and back of the racket body, and carbon fiber layers are further fixed to the outer walls of the two PE and EVA secondary high-density foam layers. A high-elasticity unit is further provided within the racket body.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Chinese Utility Model Patent No. 218357225 Summary of the Invention

[0006] The technical problem that the invention aims to solve

[0007] In the rackets described in the aforementioned bulletin, when the ball is struck with the racket, the high-elasticity units within the racket's core undergo elastic deformation, resulting in insufficient recovery of the PE and EVA secondary high-density foam layers. Consequently, the racket's rebound is inadequate.

[0008] The present invention was made in view of the above-mentioned technical problems, and its object is to provide a racket that can improve the bounce.

[0009] Technical solutions to solve technical problems

[0010] The racket of the present invention includes: a handle portion; and a body portion connected to the handle portion. The body portion includes: a core layer; a first surface layer; a first inner layer disposed such that the first inner layer sandwiches the first surface layer with the core layer; and a first outer layer disposed such that the first outer layer sandwiches the first inner layer with the first surface layer. The first inner layer is an elastomer. The first outer layer has a higher stiffness than the first inner layer. The core layer has a higher stiffness than the first inner layer.

[0011] Invention Effects

[0012] According to the racket of the present invention, it is possible to provide a racket that can improve bounce.

[0013] The above and other objects, features, methods and advantages of the present invention will become more apparent from the following detailed description of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a schematic front view showing the structure of the racket according to Embodiment 1.

[0015] Figure 2 This is a right view schematically showing the structure of the racket according to Embodiment 1.

[0016] Figure 3 This is a front view schematically showing the structure of the handle and main body of the racket according to Embodiment 1.

[0017] Figure 4 This is a right view schematically showing the structure of the handle and main body of the racket according to Embodiment 1.

[0018] Figure 5 It is shown schematically. Figure 3 A front view of the honeycomb structure of the core layer in the V section.

[0019] Figure 6 This is a right view schematically showing the structure of the handle and main body of a modified example 1 of the racket according to embodiment 1.

[0020] Figure 7 This is a right view schematically showing the structure of the handle and main body of a modified example 2 of the racket according to embodiment 1.

[0021] Figure 8 This is a right view schematically showing the structure of the handle and main body of a modified version 3 of the racket according to Embodiment 1.

[0022] Figure 9 This is a right view schematically showing the structure of the handle and main body of a modified example 4 of the racket according to embodiment 1.

[0023] Figure 10 This is a right view schematically showing the structure of the handle and main body of a modified example 5 of the racket according to embodiment 1.

[0024] Figure 11 This is a front view schematically showing the structure of the handle and main body of the racket according to Embodiment 2.

[0025] Figure 12 This is a right view schematically showing the structure of the handle and main body of the racket according to Embodiment 2.

[0026] Figure 13 This is a right view schematically showing the structure of the handle and main body of the racket according to Embodiment 3.

[0027] Figure 14 This is a right view schematically showing the structure of the handle and main body of the racket according to Embodiment 4.

[0028] Figure 15This is a schematic illustration of the racket in embodiment 4. Figure 5 A front view of the foam material in the core layer of the corresponding section.

[0029] Figure 16 This is a right view schematically showing the structure of the handle and main body of the racket according to embodiment 5.

[0030] Figure 17 This is a right view schematically showing the structure of the handle and main body of the racket according to Embodiment 6. Detailed Implementation

[0031] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, unless specifically mentioned otherwise, the same or corresponding parts will be labeled with the same reference numerals in the following drawings, and their descriptions will not be repeated.

[0032] (Implementation Method 1)

[0033] Reference Figures 1-5 The structure of the racket 100 in Embodiment 1 will be described. Figure 1 This is a schematic front view illustrating the structure of the racket 100 according to this embodiment. Furthermore, in this embodiment, the structure of the back side of the racket 100 is similar to... Figure 1 The front side of the racket 100 shown has the same structure. Figure 2 This is a right view schematically showing the structure of the racket 100 according to this embodiment. Furthermore, in this embodiment, the structure of the left side of the racket 100 is similar to... Figure 2 The structure of the right side of the racket shown is the same. The racket 100 of Embodiment 1 is a peak racket (peak racket).

[0034] like Figure 1 and Figure 2 As shown, the racket 100 of Embodiment 1 includes a handle portion 1 and a main body portion 2. The handle portion 1 is the part that the user holds. The handle portion 1 extends along the length direction of the racket 100. In this embodiment, the handle portion 1 includes a grip member 1a. The grip member 1a is configured as a base material covering the handle portion 1. The grip member 1a is, for example, a grip strap.

[0035] The main body 2 is connected to the handle 1. The handle 1 and the main body 2 are arranged along the length direction of the racket 100. The length direction of the racket 100 is consistent with the length direction of the main body 2. The short side direction of the racket 100 is consistent with the width direction of the main body 2. The main body 2 is flat. The main body 2 has a striking surface S for hitting the ball. The surface and back of the main body 2 constitute the striking surface S.

[0036] The main body 2 includes: a pair of straight sections disposed at both ends in the width direction; a root section connected to the handle section 1; a pair of root-side inclined sections that connect the pair of straight sections to the root section respectively; a top section disposed on the side opposite to the root section; and a pair of front-side inclined sections that connect the pair of straight sections to the top section.

[0037] The racket 100 of this embodiment includes a cover member 3. The cover member 3 is configured to cover the side of the main body 2. The cover member 3 is configured to cover the entire side of the main body 2. The material of the cover member 3 is, for example, resin.

[0038] Figure 3 This is a front view schematically showing the structure of the handle portion 1 and the main body portion 2 of the racket 100 according to this embodiment. Figure 4 This is a right view schematically showing the structure of the handle portion 1 and the main body portion 2 of the racket 100 according to this embodiment. For ease of explanation, in... Figure 3 and Figure 4 The gripping member 1a and the cover member 3 are not shown in the diagram. Figure 4 In the following diagram, for ease of observation, the core layer L1 of the main body 2 is simplified. Similarly, the core layer L1 of the main body 2 is also simplified in the subsequent right view.

[0039] like Figure 3 and Figure 4 As shown, the main body 2 includes a core layer L1, a first surface layer L21, a first inner layer L31, and a first outer layer L41. The first inner layer L31 is arranged such that it sandwiches the first surface layer L21 with the core layer L1. The first outer layer L41 is arranged such that it sandwiches the first inner layer L31 with the first surface layer L21.

[0040] The main body 2 includes a second surface layer L22, a second inner layer L32, and a second outer layer L42. The second surface layer L22 is arranged to sandwich the core layer L1 with the first surface layer L21. The second inner layer L32 is arranged to sandwich the second surface layer L22 with the core layer L1. The second outer layer L42 is arranged to sandwich the second inner layer L32 with the second surface layer L22.

[0041] A first surface layer L21 is stacked on the surface of the core layer L1. A second surface layer L22 is stacked on the back side of the core layer L1. A first inner layer L31 is stacked on the first surface layer L21. A second inner layer L32 is stacked on the second surface layer L22. A first outer layer L41 is stacked on the first inner layer L31. A second outer layer L42 is stacked on the second inner layer L32. That is, the first surface layer L21, the first inner layer L31, and the first outer layer L41 are stacked sequentially on the surface (one side) of the core layer L1. The second surface layer L22, the second inner layer L32, and the second outer layer L42 are stacked sequentially on the back side (the other side) of the core layer L1.

[0042] The core layer L1 can also be integrally formed with the first surface layer L21 and the second surface layer L22. That is, the core layer L1, the first surface layer L21, and the second surface layer L22 can also be integrally formed or integrally molded.

[0043] The core layer L1 is fixed to the first surface layer L21 and the second surface layer L22 with adhesive. The first surface layer L21 is fixed to the first inner layer L31 with adhesive. The second surface layer L22 is fixed to the second inner layer L32 with adhesive.

[0044] The first inner layer L31 and the first outer layer L41 are fixed together with adhesive. The second inner layer L32 and the second outer layer L42 are fixed together with adhesive. That is, the core layer L1, the first surface layer L21, the second surface layer L22, the first inner layer L31, the second inner layer L32, the first outer layer L41, and the second outer layer L42 are fixed together with adhesive.

[0045] exist Figure 4 In this configuration, the core layer L1, the first surface layer L21, the second surface layer L22, the first inner layer L31, the second inner layer L32, the first outer layer L41, and the second outer layer L42 are disposed on the main body portion 2, but not on the handle portion 1. Alternatively, the core layer L1, the first surface layer L21, the second surface layer L22, the first inner layer L31, the second inner layer L32, the first outer layer L41, and the second outer layer L42 may also be disposed on both the handle portion 1 and the main body portion 2.

[0046] The core layer L1 is disposed at the center of the stacked directions of the core layer L1, the first surface layer L21, the second surface layer L22, the first inner layer L31, the second inner layer L32, the first outer layer L41, and the second outer layer L42. The core layer L1 has the stiffness to act as a fulcrum when the racket 100 strikes the ball. The core layer L1 has higher stiffness than the first inner layer L31. The core layer L1 has higher stiffness than the second inner layer L32. The core layer L1 has higher material hardness than the first inner layer L31. The core layer L1 has higher material hardness than the second inner layer L32. The core layer L1 has higher stiffness than the first outer layer L41. The core layer L1 has higher stiffness than the second outer layer L42.

[0047] The core layer L1 is made of materials such as polypropylene (PP), polyethylene (PE), polycarbonate (PC), acrylonitrile butadiene styrene copolymer (ABS), polyvinyl chloride (PVC), polyacrylate (PA), epoxy resin (EP), polyurethane (PU), etc.

[0048] The first surface layer L21 and the second surface layer L22 are each configured as planar. That is, the first surface layer L21 and the second surface layer L22 are each configured as planar. Preferably, the first surface layer L21 and the second surface layer L22 are configured as continuous without gaps.

[0049] The materials for the first surface layer L21 and the second surface layer L22 are, for example, polypropylene (PP), polyethylene (PE), polycarbonate (PC), acrylonitrile butadiene styrene copolymer resin (ABS), polyvinyl chloride (PVC), polyacrylate (PA), epoxy resin (EP), polyurethane (PU), nonwoven fabric, etc. The first surface layer L21 and the second surface layer L22 can also be fiber-reinforced plastics.

[0050] The first inner layer L31 is an elastic body. That is, the first inner layer L31 is configured to be elastically deformable. The second inner layer L32 is an elastic body. That is, the second inner layer L32 is configured to be elastically deformable. The first inner layer L31 and the second inner layer L32 are respectively configured such that when the racket 100 hits the ball, the first outer layer L41 and the second outer layer L42 respectively recover from the central side to the outside through elastic force.

[0051] The materials of the first inner layer L31 and the second inner layer L32 are, for example, thermoplastic polyurethane (TPU), thermoplastic polyester elastomer (TPEE), thermoplastic elastomer (TPE), ethylene vinyl acetate copolymer resin (EVA), rubber, silicone, etc.

[0052] The first outer layer L41 has higher stiffness than the first inner layer L31. The first outer layer L41 has higher material hardness than the first inner layer L31. The first outer layer L41 may also have higher material hardness than the core layer L1. The second outer layer L42 has higher stiffness than the second inner layer L32. The second outer layer L42 has higher material hardness than the second inner layer L32. The second outer layer L42 may also have higher material hardness than the core layer L1.

[0053] The first outer layer L41 comprises at least one of fiber-reinforced plastic, high-hardness resin, and metal. The second outer layer L42 comprises at least one of fiber-reinforced plastic, high-hardness resin, and metal. Fiber-reinforced plastics include, for example, carbon fiber reinforced plastic (CFRP) and glass fiber reinforced plastic (GFRP). Metals include, for example, aluminum, magnesium, and titanium. Resins include, for example, polypropylene (PP), polyethylene (PE), polycarbonate (PC), acrylonitrile butadiene styrene copolymer resin (ABS), polyvinyl chloride (PVC), polyacrylate (PA), epoxy resin (EP), and polyurethane (PU).

[0054] Figure 5 It is shown schematically. Figure 3 A front view of the honeycomb structure of the core layer L1 in this embodiment within the V section. For ease of explanation, in... Figure 5 The diagram shows the core layer L1 and the second surface layer L22 disposed on the back side of the core layer L1.

[0055] like Figure 5As shown, the core layer L1 contains a honeycomb structure. A honeycomb structure is a structure in which regular hexagons are arranged without gaps when viewed from above. "Viewed from above" refers to the view taken from a direction where the surface and back of the main body 2 face each other. Alternatively, the entire core layer L1 may be a honeycomb structure. That is, the entire core layer L1 may be a honeycomb structure when viewed from above.

[0056] Next, refer to Figures 6-10 A modified example of the racket 100 of Embodiment 1 will be described.

[0057] Figure 6 This is a right view schematically showing the structure of the handle portion 1 and the main body portion 2 of a modified example 1 of the racket 100 of this embodiment. Figure 6 As shown, the laminated structure is only disposed on one side of the main body 2. That is, the main body 2 includes a core layer L1, a first surface layer L21, a first inner layer L31 and a first outer layer L41, but does not include a second surface layer L22, a second inner layer L32 and a second outer layer L42.

[0058] Figure 7 This is a right view schematically showing the structure of the handle portion 1 and the main body portion 2 of a modified example 2 of the racket 100 according to Embodiment 1. Figure 7 As shown, the first surface layer L21 is configured to cover the core layer L1. The first surface layer L21 is configured to cover the core layer L1 only in the main body 2.

[0059] Figure 8 This is a right view schematically showing the structure of the handle portion 1 and the main body portion 2 of a modified example 3 of the racket 100 according to Embodiment 1. Figure 8 As shown, the first surface layer L21 is configured to cover the core layer L1. The first surface layer L21 is configured to cover the core layer L1 in both the handle portion 1 and the main body portion 2. However, the first surface layer L21 does not cover the end (root side end face) of the handle portion 1.

[0060] Figure 9 This is a right view schematically showing the structure of the handle portion 1 and the main body portion 2 of a modified example 4 of the racket 100 according to Embodiment 1. Figure 9 As shown, the first outer layer L41 is configured to cover the core layer L1, the first surface layer L21, and the first inner layer L31. The first outer layer L41 is configured to cover the core layer L1, the first surface layer L21, and the first inner layer L31 only in the main body 2.

[0061] Figure 10 This is a right view schematically showing the structure of the handle portion 1 and the main body portion 2 of a modified example 5 of the racket 100 according to Embodiment 1. Figure 10As shown, the first outer layer L41 is configured to cover the core layer L1, the first surface layer L21, and the first inner layer L31. The first outer layer L41 is configured to cover the core layer L1, the first surface layer L21, and the first inner layer L31 in the handle portion 1 and the main body portion 2. In addition, the first outer layer L41 does not cover the end of the handle portion 1 (root side end face).

[0062] Next, the effects of the racket 100 in Embodiment 1 will be explained.

[0063] According to the racket 100 of Embodiment 1, the first inner layer L31 is an elastomer. While the first outer layer L41 has higher stiffness than the first inner layer L31, it allows the first inner layer L31 to flex sufficiently, thus improving rebound performance. The core layer L1 has higher stiffness than the first inner layer L31. Therefore, since a stiff member, the core layer L1, serving as a fulcrum, is disposed inside the first inner layer L31, which is an elastomer, the restoring force of the first inner layer L31, as an elastomer, can be enhanced. This improves rebound performance.

[0064] According to the racket 100 of Embodiment 1, the second inner layer L32 is an elastomer. Although the second outer layer L42 has higher stiffness than the second inner layer L32, it allows the second inner layer L32 to flex sufficiently, thus improving rebound performance. The core layer L1 has higher stiffness than the second inner layer L32. Therefore, since the core layer L1, a stiff member serving as a fulcrum, is disposed inside the second inner layer L32, which is an elastomer, the restoring force of the second inner layer L32, as an elastomer, can be enhanced. This improves rebound performance. Therefore, the coefficient of rebound can be increased on both the surface and back of the racket 100.

[0065] According to the racket 100 of embodiment 1, the core layer L1 has higher stiffness than the first outer layer L41. Therefore, the first outer layer L41 can be fully flexed.

[0066] According to embodiment 1, the racket 100 has a first outer layer L41 comprising at least one of fiber-reinforced plastic, high-hardness resin, and metal.

[0067] According to embodiment 1, the racket 100 has a core layer L1 comprising a honeycomb structure. Therefore, the stiffness of the core layer L1 can be improved.

[0068] The main body 2 includes a first surface layer L21. Therefore, compared to the case where the first inner layer L31 is directly bonded to the core layer L1 of the honeycomb structure, the bonding area of ​​the first inner layer L31 can be increased by the first surface layer L21. Therefore, the bonded portion of the first inner layer L31 is difficult to peel off. As a result, the durability and resilience of the first inner layer L31 and the core layer L1 can be improved.

[0069] According to the racket 100 of Embodiment 1, the first surface layer L21 is configured to cover the core layer L1. Therefore, the first surface layer L21 can be laminated onto the core layer L1 without the use of adhesive. According to the racket 100 of Embodiment 1, the first outer layer L41 is configured to cover the core layer L1, the first surface layer L21, and the first inner layer L31. Therefore, the first outer layer L41 can be laminated onto the core layer L1, the first surface layer L21, and the first inner layer L31 without the use of adhesive. In addition, the appearance of the racket 100 can be improved.

[0070] (Implementation Method 2)

[0071] Unless otherwise specified, the racket 100 of Embodiment 2 has the same structure and function as the racket 100 of Embodiment 1.

[0072] Reference Figure 11 and Figure 12 The structure of the racket 100 in Embodiment 2 will be described. Figure 11 This is a front view schematically showing the structure of the handle portion 1 and the main body portion 2 of the racket 100 according to this embodiment. Figure 12 This is a right view schematically showing the structure of the handle portion 1 and the main body portion 2 of the racket 100 according to this embodiment. For ease of explanation, in... Figure 11 and Figure 12 The gripping component 1a and the cover component 3 are not shown in the figure.

[0073] In the racket 100 of Embodiment 2, the core layer L1 and the first surface layer L21 are disposed on both the handle portion 1 and the main body portion 2. In this embodiment, the handle portion 1 includes the core layer L1 and the first surface layer L21. The core layer L1 and the first surface layer L21 extend from the main body portion 2 to the handle portion 1.

[0074] In this embodiment, the second surface layer L22 is disposed on both the handle portion 1 and the main body portion 2. The handle portion 1 includes the second surface layer L22. The second surface layer L22 extends from the main body portion 2 to the handle portion 1.

[0075] Next, the effects of the racket 100 in Embodiment 2 will be explained.

[0076] According to the racket 100 of Embodiment 2, the core layer L1 and the first surface layer L21 extend from the main body 2 to the handle portion 1. Therefore, the core layer L1 and the first surface layer L21 can be prevented from bending in the bending direction. As a result, it is possible to achieve both high bending stiffness and good deflection and recovery of the hitting surface.

[0077] (Implementation Method 3)

[0078] Unless otherwise specified, the racket 100 of Embodiment 3 has the same structure and function as the racket 100 of Embodiment 2.

[0079] Reference Figure 13 The structure of the racket 100 in Embodiment 3 will be described. Figure 13 This is a right view schematically showing the structure of the handle portion 1 and the main body portion 2 of the racket 100 according to this embodiment. For ease of explanation, in... Figure 13 The gripping component 1a and the cover component 3 are not shown in the figure.

[0080] In the racket 100 of Embodiment 3, the core layer L1, the first surface layer L21, the first inner layer L31, and the first outer layer L41 are disposed on both the handle portion 1 and the main body portion 2. In this embodiment, the handle portion 1 includes the core layer L1, the first surface layer L21, the first inner layer L31, and the first outer layer L41. The core layer L1, the first surface layer L21, the first inner layer L31, and the first outer layer L41 extend from the main body portion 2 to the handle portion 1.

[0081] In this embodiment, the second surface layer L22, the second inner layer L32, and the second outer layer L42 are disposed on both the handle portion 1 and the main body portion 2. The handle portion 1 includes the second surface layer L22, the second inner layer L32, and the second outer layer L42. The second surface layer L22, the second inner layer L32, and the second outer layer L42 extend from the main body portion 2 to the handle portion 1.

[0082] Next, the effects of the racket 100 in Embodiment 3 will be explained.

[0083] According to the racket 100 of embodiment 3, in addition to the core layer L1 and the first surface layer L21, the first inner layer L31 and the first outer layer L41 also extend from the main body 2 to the handle portion 1. Therefore, the core layer L1, the first surface layer L21, the first inner layer L31, and the first outer layer L41 can be prevented from bending in the bending direction. As a result, it is possible to further achieve a balance between high bending stiffness and the deflection and recovery of the hitting surface.

[0084] (Implementation Method 4)

[0085] Unless otherwise specified, the racket 100 of Embodiment 4 has the same structure and function as the racket 100 of Embodiment 1.

[0086] Reference Figure 14 as well as Figure 15 The structure of the racket 100 in Embodiment 4 will be described. Figure 14 This is a right view schematically showing the structure of the handle portion 1 and the main body portion 2 of the racket 100 according to this embodiment. For ease of explanation, in... Figure 14 The gripping component 1a and the cover component 3 are not shown in the figure. Figure 15 This schematically illustrates the relationship between the core layer L1 and the core layer L1 in this embodiment. Figure 5 The front view of the foaming material in the corresponding section.

[0087] In the racket 100 of embodiment 4, the core layer L1 comprises foam material. Alternatively, the entire core layer L1 may be made of foam material. That is, the entire core layer L1 may be made of foam material when viewed from above.

[0088] Materials used in foaming include, for example, ethylene-vinyl acetate copolymer resin (EVA, acrylonitrile-butadiene-styrene copolymer resin (ABS), polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), ethylene propylene rubber (EPDM), thermoplastic elastomer (TPE), polystyrene (PS), polyurethane (PU), etc.

[0089] Next, the effects of the racket 100 in Embodiment 4 will be explained.

[0090] According to the racket 100 of embodiment 4, the core layer L1 comprises a foamed material. Therefore, since the foamed material is lighter than the honeycomb structure, the core layer L1 can be made lighter.

[0091] (Implementation Method 5)

[0092] Unless otherwise specified, the racket 100 of Embodiment 5 has the same structure and function as the racket 100 of Embodiment 4.

[0093] Reference Figure 16 The structure of the racket 100 in Embodiment 5 will be described. Figure 16 This is a right view schematically showing the structure of the handle portion 1 and the main body portion 2 of the racket 100 according to this embodiment. For ease of explanation, in... Figure 16 The gripping component 1a and the cover component 3 are not shown in the figure.

[0094] In the racket 100 of embodiment 5, the core layer L1 comprises a foamed material. The core layer L1 and the first surface layer L21 are disposed on both the handle portion 1 and the main body portion 2. In this embodiment, the handle portion 1 comprises the core layer L1 and the first surface layer L21. The core layer L1 and the first surface layer L21 extend from the main body portion 2 to the handle portion 1.

[0095] In this embodiment, the second surface layer L22 is disposed on both the handle portion 1 and the main body portion 2. The handle portion 1 includes the second surface layer L22. The second surface layer L22 extends from the main body portion 2 to the handle portion 1.

[0096] Next, the effects of the racket 100 in Embodiment 5 will be explained.

[0097] According to embodiment 5, the racket 100 has a core layer L1 comprising a foamed material. The core layer L1 and the first surface layer L21 extend from the main body 2 to the handle 1. Therefore, it is possible to achieve both high bending stiffness and the flexibility and recovery of the hitting surface while making the core layer L1 lightweight.

[0098] (Implementation Method 6)

[0099] Unless otherwise specified, the racket 100 of Embodiment 6 has the same structure and function as the racket 100 of Embodiment 5.

[0100] Reference Figure 17 The structure of the racket 100 in Embodiment 6 will be described. Figure 17 This is a right view schematically showing the structure of the handle portion 1 and the main body portion 2 of the racket 100 according to this embodiment. For ease of explanation, in... Figure 17 The gripping component 1a and the cover component 3 are not shown in the figure.

[0101] In the racket 100 of Embodiment 5, the core layer L1 comprises a foamed material. The core layer L1, the first surface layer L21, the first inner layer L31, and the first outer layer L41 are disposed on both the handle portion 1 and the main body portion 2. In this embodiment, the handle portion 1 comprises the core layer L1, the first surface layer L21, the first inner layer L31, and the first outer layer L41. The core layer L1, the first surface layer L21, the first inner layer L31, and the first outer layer L41 extend from the main body portion 2 to the handle portion 1.

[0102] In this embodiment, the second surface layer L22, the second inner layer L32, and the second outer layer L42 are disposed on both the handle portion 1 and the main body portion 2. The handle portion 1 includes the second surface layer L22, the second inner layer L32, and the second outer layer L42. The second surface layer L22, the second inner layer L32, and the second outer layer L42 extend from the main body portion 2 to the handle portion 1.

[0103] Next, the effects of the racket 100 in Embodiment 6 will be explained.

[0104] According to embodiment 6, the racket 100 has a core layer L1 comprising a foamed material. In addition to the core layer L1 and the first surface layer L21, a first inner layer L31 and a first outer layer L41 also extend from the main body 2 to the handle portion 1. Therefore, it is possible to achieve both high bending stiffness and flexibility and recovery of the hitting surface while making the core layer L1 lightweight.

[0105] The invention has been described in detail and illustrated, but it should be understood that these are for illustrative and exemplary purposes only and should not be construed as limiting. The scope of the invention should be interpreted according to the language of the claims.

Claims

1. A racket, characterized in that, include: handle part; as well as The main body is connected to the handle portion; The main body comprises: a core layer; a first surface layer; A first inner layer, configured to sandwich the first surface layer with the core layer; and a first outer layer, configured to sandwich the first inner layer with the first surface layer. The first inner layer is an elastomer. The first outer layer has higher stiffness than the first inner layer. The core layer has higher stiffness than the first inner layer.

2. The racket according to claim 1, characterized in that, The main body includes: a second surface layer disposed such that it sandwiches the core layer with the first surface layer; a second inner layer disposed such that it sandwiches the second surface layer with the core layer; and a second outer layer disposed such that it sandwiches the second inner layer with the second surface layer. The second inner layer is an elastomer. The second outer layer has higher stiffness than the second inner layer. The core layer has higher stiffness than the second inner layer.

3. The racket according to claim 1, characterized in that, The core layer has higher stiffness than the first outer layer.

4. The racket according to claim 1, characterized in that, The first outer layer comprises at least one of fiber-reinforced plastic, high-hardness resin, and metal.

5. The racket according to claim 1, characterized in that, The core layer contains a honeycomb structure.

6. The racket according to claim 1, characterized in that, The first surface layer is configured to cover the core layer.

7. The racket according to claim 1, characterized in that, The first outer layer is configured to cover the core layer, the first surface layer, and the first inner layer.

8. The racket according to claim 1, characterized in that, The handle portion includes the core layer and the first surface layer. The core layer and the first surface layer extend from the main body to the handle portion.

9. The racket according to claim 8, characterized in that, The handle portion includes the first inner layer and the first outer layer. The first inner layer and the first outer layer extend from the main body portion to the handle portion.

10. The racket according to claim 1, characterized in that, The core layer comprises a foamed material.

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