CN212467032U

CN212467032U - Tennis racket

Info

Publication number: CN212467032U
Application number: CN202020899024.6U
Authority: CN
Inventors: 赵芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-02-05
Anticipated expiration: 2030-05-25

Abstract

The utility model discloses a tennis racket, it includes: the racket head structure comprises an outer racket frame, a plurality of racket strings and an inner racket frame with elastic restoring force, wherein the outer racket frame and the inner racket frame are both in annular structures, and the inner racket frame is positioned in the outer racket frame. The racket rod structure comprises an adjusting rod and a handle held by a person, wherein one end of the handle is connected with the outer racket frame, the end surface of the other end of the handle is provided with an adjusting hole penetrating into the outer racket frame, one end of the adjusting rod penetrates through the adjusting hole and is connected with one end of the inner racket frame, the other end of the inner racket frame is fixedly connected with the outer racket frame, and the adjusting rod moves towards the direction departing from the outer racket frame so as to adjust the inner diameter of the inner racket frame; and the limiting structure comprises a guide post positioned in the outer racket frame, and the guide post is used for limiting the contraction of the inner racket frame towards the center of the outer racket frame and also used for limiting the rotation of the inner racket frame. The utility model discloses can effectively tensioning racket line to make the tennis racket by better use.

Description

Tennis racket

Technical Field

The utility model relates to a sport equipment technical field especially relates to a tennis racket.

Background

In recent years, tennis sports are rapidly developed and increasingly popular in China, particularly in universities, the number of tennis lovers is almost the same as that of football and basketball, more and more people enjoy playing tennis, and the tennis sports related industry brings huge market.

However, after the tennis racket strikes the tennis ball for a long time, the racket strings are loosened, thereby affecting the subsequent use of the tennis racket.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tennis racket, aim at solving the problem of how to tension the racket string.

The utility model provides a tennis racket, it includes:

the racket head structure comprises an outer racket frame, a plurality of racket strings and an inner racket frame with elastic restoring force, wherein the outer racket frame and the inner racket frame are both in annular structures, the inner racket frame is positioned in the outer racket frame, two ends of each racket string are connected with the side surface of the inner ring of the inner racket frame and are arranged in a staggered mode, and the side surface of the outer ring of the inner racket frame and the side surface of the inner ring of the outer racket frame are arranged at a preset distance;

the limiting structure comprises a guide post positioned in the outer racket frame, and the guide post is provided with a first end connected with the side surface of the inner racket frame ring and a second end connected with the side surface of the outer racket frame ring; and

the racket rod structure comprises an adjusting rod and a handle held by a person, one end of the handle is connected with the outer racket frame, the end face of the other end of the handle is provided with an adjusting hole penetrating into the outer racket frame, the outer racket frame is provided with an avoiding hole for the adjusting rod to pass through, one end of the adjusting rod penetrates through the adjusting hole and is connected with one end of the inner racket frame, the other end, far away from the avoiding hole, of the inner racket frame is fixedly connected with the outer racket frame, and the adjusting rod moves towards the direction far away from the outer racket frame so as to adjust the inner diameter of the inner racket frame;

the guide posts are arranged on at least two sides of the axial extension line of the adjusting rod.

In one embodiment, a threaded hole is formed in the position, connected with the adjusting rod, of the inner racket frame, and an external thread matched with the threaded hole is formed in one end of the adjusting rod and is screwed in the threaded hole.

In one embodiment, the inner racket frame includes a frame body connected to the outer racket frame and an adjusting post having one end connected to the frame body, the other end of the adjusting post is located in the avoiding hole, the threaded hole is opened in the adjusting post, and each of the second ends is connected to the frame body.

In one embodiment, the tennis racket further comprises a fixing plate arranged in the outer racket frame, and two ends of the fixing plate are respectively connected with the inner ring side surface of the outer racket frame and the outer side surface of the frame body.

In one embodiment, the ring side surface of the inner racket frame is provided with a guide groove, the path of the guide groove is arranged along the circumferential direction of the inner racket frame, and the second end is slidably connected in the guide groove.

In one embodiment, the cross-sectional area of the guide post is gradually enlarged from the first end to the second end, the guide groove is in a through groove structure, the second end penetrates through the guide groove, and the groove width of the guide groove is gradually enlarged along the moving direction of the adjusting rod.

In one embodiment, the guide groove is a through groove structure, the second end penetrates through the guide groove, and the limiting structure further comprises a limiting post, the limiting post is arranged at the end face of the second end, and the limiting post abuts against the inner ring side face of the inner racket frame.

In one embodiment, the free end of the handle is provided with a countersunk groove, the adjusting hole is formed at the bottom of the countersunk groove, and one end of the adjusting rod is positioned in the countersunk groove.

In one embodiment, the free end of the handle is provided with a rubber sleeve.

The technical effects of the utility model are that: the inner racket frame moves along with the adjusting rod, so that the inner diameter of the inner racket frame is increased along the moving direction, and the guide posts limit the inner racket frame to contract towards the center of the outer racket frame, even if the distance between the inner racket frame and the outer racket frame at the positions of the guide posts cannot be increased, the racket string can be tensioned by moving the adjusting rod.

Drawings

FIG. 1 is a cross-sectional view of a tennis racket in accordance with an embodiment of the present invention;

FIG. 2 is a schematic perspective view of the outer frame of FIG. 1;

FIG. 3 is a schematic view of the assembly of the racquet frame and guide post of FIG. 1;

FIG. 4 is a schematic structural view of the guide post of FIG. 3;

fig. 5 is a schematic structural diagram of a limiting structure in another embodiment.

The correspondence between reference numbers and names in the drawings is as follows:

100. a tennis racket; 10. a head structure; 11. an outer racket frame; 12. an inner racket frame; 121. a frame body; 122. an adjustment column; 123. a guide groove; 124. a threaded hole; 20. a racket shaft structure; 21. a handle; 22. adjusting a rod; 214. an adjustment hole; 211. a countersunk groove; 41. a fixing plate; 30. a limiting structure; 31. a guide post; 32. a limiting column; 212. avoiding holes; 111. connecting holes; 311. a first end; 312. a second end; 13. a racket string.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "vertical", "parallel", "bottom", "angle", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship.

Referring to fig. 1 to 3, an embodiment of the present invention provides a tennis racket 100, in which a user can adjust a tension of a racket string 13 of the tennis racket 100, so that the tennis racket 100 can be used better. The tennis racket 100 includes a head structure 10, a shaft structure 20, and a stopper structure 30. The head structure 10 includes an outer frame 11, a plurality of strings 13, and an inner frame 12 having an elastic restoring force, and the inner frame 12 may be alternatively made of a metal material having a relatively good plasticity. The outer racket frame 11 and the inner racket frame 12 are both in an annular structure, the inner racket frame 12 is positioned in the outer racket frame 11, and two ends of each racket string 13 are connected with the inner ring side surface of the inner racket frame 12 and are arranged in a mutually staggered mode. The outer ring side of the inner racket frame 12 and the inner ring side of the outer racket frame 11 are arranged with a predetermined distance. Optionally, the outer frame 11 and the inner frame 12 are adapted in shape. The shape of the outer frame 11 and the inner frame 12 may be circular, oval or square. In this embodiment, the outer frame 11 and the inner frame 12 are both oval. Both ends of each racket string 13 are connected to the inner ring side of the inner racket frame 12 and are arranged in a staggered manner, and are woven into a racket net for hitting tennis balls. The inner frame 12 has an elastic restoring force that the inner diameter of the inner frame 12 can be properly expanded by an external force, thereby stretching and tensioning the racket string 13 coupled thereto. It can be understood that the loose degree of the racket string 13 is not large, the inner diameter of the inner frame 12 is enlarged properly, and the circumference of the inner frame 12 is enlarged properly, thereby achieving the purpose of tensioning the racket string 13. The position limiting structure 30 comprises a guide post 31 positioned in the outer racket frame 11, and the guide post 31 has a first end 311 connected with the inner ring side surface of the outer racket frame 11 and a second end 312 connected with the inner racket frame 12. Alternatively, the outer frame 11 is provided with a coupling hole 111, and the first end 311 is coupled to the outer frame 11 through the coupling hole 111. Alternatively, the second end may be slidably connected to the inner frame 12, the guide posts 31 are used for limiting the contraction of the inner frame 12 towards the central position of the outer frame 11 and also for limiting the rotation of the inner frame 12, at least two guide posts 31 are provided, and each guide post 31 is arranged around the central position of the inner frame 12 at intervals. The racket rod structure 20 comprises an adjusting rod 22 and a handle 21 held by a human hand, one end of the handle 21 is connected with the outer racket frame 11, the end surface of the other end of the handle 21 is provided with an adjusting hole 214 penetrating into the outer racket frame 11, the outer racket frame 11 is provided with an avoiding hole 212 for the adjusting rod 22 to pass through, one end of the adjusting rod 22 penetrates through the adjusting hole 214 and is connected with the inner racket frame 12 through the avoiding hole 212, the other end of the inner racket frame 12 far away from the avoiding hole 212 is fixedly connected with the outer racket frame 11 through a connecting piece, namely, the near end of the inner racket frame 12 close to the adjusting rod 22 is connected with the adjusting rod 22, and the far end of the inner racket frame 12 far away from the adjusting rod 22 is fixedly connected with. The adjusting rod 22 is moved in a direction away from the outer racquet frame 11 to adjust the inner diameter of the inner racquet frame 12. Alternatively, the guide posts 31 are spatially located on either side of the axial extension of the adjustment lever 22.

One end of the inner frame 12 moves together with the adjustment rod 22 and the other end is fixed, so that the inner diameter of the inner frame 12 increases in the moving direction of the adjustment rod 22, thereby increasing the circumference of the inner frame 12, and the inner frame 12 is restricted from contracting by the guide posts 31, i.e., the distance between the inner frame 12 and the outer frame 11 does not increase at the positions of the guide posts 31, thereby allowing the racket string 13 to be tensioned by the movement of the adjustment rod 22. Further, the guide posts 31 also restrict the rotation of the inner frame 12, so that the inner frame 12 can be kept stable as a whole when hitting tennis balls.

In one embodiment, the position of the inner racket frame 12 connected to the adjusting rod 22 is provided with a threaded hole 124, and one end of the adjusting rod 22 is provided with an external thread and is screwed into the threaded hole 124. Alternatively, the inner frame 12 and the adjusting rod 22 are threadedly coupled, so that the rotational movement of the adjusting rod 22 can be converted into the linear movement of the inner frame 12 by rotating the adjusting rod 22, thereby facilitating the adjustment of the inner diameter of the inner frame 12.

In one embodiment, the inner racket frame 12 includes a frame body 121 connected to the outer racket frame 11 and an adjusting post 122 having one end connected to the frame body 121, and the other end of the adjusting post 122 is located at the avoiding hole 212, and the frame body 121 can be fixed by the cooperation of the avoiding hole 212 and the adjusting post 122. The screw hole 124 is opened in the adjusting post 122, and each guide post 31 is slidably connected to the frame body 121. Optionally, during the rotation of the adjusting rod 22, the adjusting column 122 moves towards the avoiding hole 212, so as to drive the frame body 121 to move, and further increase the inner diameter of the frame body 121.

In one embodiment, the tennis racket 100 further includes a fixing plate 41 disposed inside the outer frame 11, and both ends of the fixing plate 41 are respectively connected to the inner ring side of the outer frame 11 and the outer side of the frame body 121. The distal end of the inner frame 12 can be connected to the outer frame 11 by the fixing plate 41.

In one embodiment, the ring side of the racket frame 12 is opened with a guide groove 123, the path of the guide groove 123 is arranged along the circumference of the racket frame 12, and the second end 312 is slidably connected in the guide groove 123. Optionally, the guide groove 123 is in a dovetail groove structure, and the shape of the second end 312 is adapted to the dovetail groove structure, so that during the increase of the inner diameter of the inner racket frame 12, the second end 312 abuts against the inner wall of the guide groove 123 and is always connected with the inner racket frame 12, and further, the distance between the inner racket frame 12 and the outer racket frame 11 is not increased.

Referring to fig. 3 and 4, in one embodiment, the cross-sectional area of the guiding column 31 is gradually increased from the first end 311 to the second end 312, that is, the cross-sectional shape of the guiding column 31 is circular, and the guiding column 31 has a conical column structure. The guide groove 123 is a through groove structure, and the second end 312 penetrates through the guide groove 123, that is, the groove walls on both sides of the guide groove 123 abut against the surface of the second end 312, so that the rotation of the inner racket frame 12 can be limited. And the width of the guide groove 123 is set to be reduced toward the moving direction of the adjustment lever 22, that is, the width of the guide groove 123 is set to be reduced toward the moving direction away from the adjustment lever 22.

Specifically, the maximum groove width of the guide groove 123 is smaller than the maximum outer diameter of the guide post 31, so that the guide post 31 and the guide groove 123 can always be slidably connected.

Further, when the inner frame 12 is moved in the axial direction (a direction) of the adjustment lever 22 by the driving of the adjustment lever 22 and the inner diameter thereof is increased, the width of the groove where each guide groove 123 engages with the corresponding guide post 31 is decreased, so that the inner frame 12 needs to be slid toward the first end 311 (b direction), and the distance between the inner frame 12 and the outer frame 11 is decreased, and finally the inner diameter of the entire inner frame 12 is increased and the strings 13 are tensioned. It can be understood that, in the present embodiment, the inner diameter of the racket frame 12 can be enlarged only by rotating the adjusting rod 22, and the operation is simple and the adjusting efficiency is high.

Referring to fig. 5, optionally, the guide groove 123 is a through groove structure, that is, the guide groove 123 penetrates through two ring side surfaces of the inner racket frame 12, the second end 312 penetrates through the guide groove 123, the limiting structure 30 further includes a limiting post 32, the limiting post 32 is disposed at an end surface of the second end 312, the limiting post 32 abuts against an inner ring side surface of the inner racket frame 12, the second end 312 and the guide groove 123 can be slidably connected through the limiting post 32, and the inner racket frame 12 can be prevented from shrinking.

In one embodiment, the free end of the handle 21 is formed with a countersunk groove 211, the adjusting hole 214 is formed at the bottom of the countersunk groove 211, and one end of the adjusting rod 22 is located in the countersunk groove 211.

In one embodiment, the free end of the handle 21 is provided with a rubber sleeve, by which the friction between the human hand and the racket shaft can be increased.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A tennis racket, comprising:

2. A tennis racket as defined in claim 1, wherein: the position of the inner racket frame connected with the adjusting rod is provided with a threaded hole, and one end of the adjusting rod is provided with an external thread matched with the threaded hole and is screwed in the threaded hole.

3. A tennis racket as defined in claim 2, wherein: the inner racket frame comprises a frame body connected with the outer racket frame and adjusting columns, one ends of the adjusting columns are connected with the frame body, the other ends of the adjusting columns are located in the avoiding holes, the threaded holes are formed in the adjusting columns, and the second ends of the adjusting columns are connected with the frame body.

4. A tennis racket as defined in claim 3, wherein: the tennis racket further comprises a fixed plate arranged in the outer racket frame, and two ends of the fixed plate are respectively connected with the inner ring side face of the outer racket frame and the outer side face of the frame body.

5. A tennis racket according to any one of claims 1 to 4, wherein: a guide groove is formed in the side face of the inner racket frame, the path of the guide groove is arranged along the circumferential direction of the inner racket frame, and the second end is connected into the guide groove in a sliding mode.

6. A tennis racket according to claim 5, wherein: the cross sectional area of guide post by first end to the second end gradually expands the setting, the guide way is logical groove structure, the second end is worn to establish the guide way, just the groove width of guide way is towards following the moving direction of adjusting the pole reduces and expands the setting.

7. A tennis racket according to claim 5, wherein: the guide groove is of a through groove structure, the second end penetrates through the guide groove, the limiting structure further comprises a limiting column, the limiting column is arranged at the end face of the second end, and the limiting column is abutted against the inner ring side face of the inner racket frame.

8. A tennis racket as defined in claim 1, wherein: the free end of the handle is provided with a countersunk groove, the adjusting hole is formed in the bottom of the countersunk groove, and one end of the adjusting rod is located in the countersunk groove.

9. A tennis racket as defined in claim 1, wherein: the free end of the handle is provided with a rubber sleeve.