A badminton racket with automatically adjustable string tension

Abstract

This utility model provides a badminton racket with automatic string tension adjustment, relating to the field of badminton racket technology. It includes a racket frame, with a mounting block fixedly connected to the bottom of the frame. Mounting rods are fixedly connected to both sides of the mounting block, and a stringing spool is sleeved on the outer side of each mounting rod. One end of the stringing spool is fixedly connected to a gear sleeved on the mounting rod, and the other end is fixedly connected to a hexagonal screw sleeved on the mounting rod. Both sides of the mounting block are fixedly connected to internal gear rings coaxially distributed with the mounting rods. The racket includes a stringing spool, gear, internal gear ring, hexagonal screw, and threaded sleeve. When adjusting the string tension, the threaded sleeve is unscrewed to separate the gear from the internal gear ring. A hexagonal wrench is used to turn the hexagonal screw, causing the stringing spool to rotate and adjust the string tension. Furthermore, the two stringing spools control the two ends of the string respectively, allowing for independent adjustment of the tension at each end and precise compensation for the tension at the slack end.

Description

Technical Field

[0001] This utility model relates to the field of badminton racket technology, and in particular to a badminton racket with automatic string tension adjustment. Background Technology

[0002] With the popularization of sports knowledge, badminton has become a popular sport. When the strings of a badminton racket become loose, it needs to be repaired and tightened at a specialized stringing shop, or the entire racket needs to be replaced so that it can continue to be used normally.

[0003] Therefore, an existing badminton racket with automatic string tension adjustment, disclosed in CN219815210U, facilitates stringing installation through the design of a take-up frame, and facilitates the installation and rotation of a tightening roller through the design of a rotating shaft. The motor facilitates the rotation of the tightening roller, thereby tightening the racket strings. With the tightening roller, the user first secures one end of the string around the roller during installation. After stringing is complete, the user can control the tension of the string on the tightening roller surface via the motor. This stringing mechanism reduces friction after stringing, thus extending the racket's lifespan and facilitating tightening or loosening. The rotating bead design further reduces friction between the string and the mounting frame during installation.

[0004] However, the motor and support structure in the racket increase the racket's weight, disrupting its swing inertia and balance, and affecting the feel of hitting the ball. Furthermore, the motor-driven tension roller synchronously adjusts the tension at both ends of the string, but if one end of the string is not securely fixed or unevenly wound, it may lead to an imbalance in tension distribution, with the slack end unable to compensate in time, causing the other side of the string to break due to excessive stretching. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art, and to propose a badminton racket with automatic string tension adjustment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a badminton racket with automatic string tension adjustment, comprising a frame, a mounting block fixedly connected to the bottom of the frame, mounting rods fixedly connected to both sides of the mounting block, a winding spool sleeved on the outer side of the mounting rod, a gear sleeved on one end of the winding spool and a hexagonal screw sleeved on the other end of the winding spool, internal gear rings coaxially distributed with the mounting rod fixedly connected to both sides of the mounting block, the internal gear rings engaging with the gears, and an external threaded portion engraved on the outer side of the other end of the mounting rod, the mounting rod being threadedly connected to a threaded sleeve through the external threaded portion.

[0007] Preferably, the side of the racket frame has several threading openings evenly distributed, and a U-shaped plate is fixedly connected inside the threading opening, with a plug inserted into the open end of the U-shaped plate.

[0008] Preferably, the end of the insert rod away from the U-shaped plate extends outward and the extended end passes through the frame and extends outside the frame.

[0009] Preferably, a fixed stop is fixedly connected to one side of the frame, and a movable stop is provided on the other side. The movable stop is fixed to the extension ends of multiple insert rods.

[0010] Preferably, a fixing bolt is provided on the movable stop, and the fixing bolt is threadedly connected to the frame.

[0011] Preferably, anti-slip teeth are provided on the opposite sides of the insertion rod and the U-shaped plate.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, a winding spool, a gear, an internal gear ring, a hexagonal screw, and a threaded sleeve are provided. When adjusting the string tension, the threaded sleeve is unscrewed to separate the gear from the internal gear ring. The string tension can be adjusted by turning the hexagonal screw with a hexagonal wrench to drive the winding spool to rotate. Moreover, the two winding spools control the two ends of the string respectively, and the tension of each end can be adjusted independently to accurately compensate for the tension of the slack end.

[0014] 2. In this utility model, when threading the wire, the string is passed through the U-shaped plate, and the movable insert rod is clamped by the anti-slip teeth to prevent loosening. The fixed and movable stops ensure the stability of the string. Tightening the fixing bolt on the movable stop can adjust the clamping or loosening state of the insert rod and the U-shaped plate relative to the wire. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of a badminton racket with automatic string tension adjustment is provided for this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the frame in this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the movable guard in this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the anti-slip teeth in this utility model;

[0019] Figure 5 This is a three-dimensional structural diagram of the mounting rod in this utility model;

[0020] Figure 6 for Figure 1 Enlarged view of point A in the middle.

[0021] Legend: 1. Frame; 2. Movable guard; 3. Threading port; 4. External thread; 5. Fixing bolt; 6. Fixing guard; 7. Insert rod; 8. Anti-slip teeth; 9. U-shaped plate; 10. Threaded sleeve; 11. Hex screw; 12. Winding spool; 13. Gear; 14. Internal gear ring; 15. Mounting block; 16. Mounting rod. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0024] like Figure 1-6 As shown, a badminton racket with automatic string tension adjustment includes a frame 1. A mounting block 15 is fixedly connected to the bottom of the frame 1. Mounting rods 16 are fixedly connected to both sides of the mounting block 15. A winding spool 12 is sleeved on the outside of the mounting rod 16. A gear 13 sleeved with the mounting rod 16 is fixedly connected to one end of the winding spool 12, and a hexagonal screw 11 sleeved with the mounting rod 16 is fixedly connected to the other end. Internal gear rings 14 coaxially distributed with the mounting rod 16 are fixedly connected to both sides of the mounting block 15. The internal gear rings 14 are engaged with the gear 13. An external thread 4 is engraved on the outside of the other end of the mounting rod 16. A threaded sleeve 10 is threadedly connected to the mounting rod 16 through the external thread 4.

[0025] In this technical solution, when it is necessary to adjust the string tension, the threaded sleeve 10 can be rotated to remove it from the mounting rod 16, thereby moving the winding shaft 12 and causing the gear 13 to move from the inner gear ring 14, thus canceling the engagement between the gear 13 and the inner gear ring 14. Then, by turning the hexagonal screw 11 with a hexagonal wrench, the winding shaft 12 is rotated, thereby pulling the string and adjusting the string tension. In addition, by setting two winding shafts 12, after the string is threaded, the two ends of the string are respectively tied and fixed to the two winding shafts 12. The two winding shafts 12 control the two ends of the string respectively, and the tension of each end can be adjusted independently. When it is found that a certain end of the string is slack or has uneven tension, the winding shaft 12 of the corresponding end can be adjusted to accurately compensate for the tension of the slack end.

[0026] like Figure 2 and Figure 3As shown, several threading holes 3 are evenly opened on the side of the racket frame 1. A U-shaped plate 9 is fixedly connected inside the threading hole 3. A rod 7 is inserted into the open end of the U-shaped plate 9. The end of the rod 7 away from the U-shaped plate 9 extends outward and passes through the racket frame 1 and extends to the outside of the racket frame 1. A fixed baffle 6 is fixedly connected to one side of the racket frame 1, and a movable baffle 2 is provided on the other side. The movable baffle 2 is fixed to the extended ends of the multiple rods 7.

[0027] In this technical solution, by setting up the insertion rod 7 and the U-shaped plate 9, when threading the wire, the wire passes through the U-shaped plate 9. Then, the insertion rod 7 is moved so that one end of the insertion rod 7 moves toward the U-shaped plate 9, and their opposite sides move closer to each other, thereby squeezing and fixing the wire to prevent loosening.

[0028] In addition, by setting the fixed stop 6 and the movable stop 2, the stability of the string is ensured. When the string is loose, it provides a fixed boundary to prevent excessive deviation. The movable stop 2 is used so that by pushing the movable stop 2 to move, all the plug rods 7 can move together.

[0029] like Figure 2 As shown, a fixing bolt 5 is provided on the movable guard 2, and the fixing bolt 5 is threadedly connected to the frame 1.

[0030] In this technical solution, by using the fixing bolt 5, the movable sidewall 2 can be moved relative to the frame 1 by turning the fixing bolt 5, so as to facilitate the adjustment of the clamping or loosening of the insertion rod 7 and the U-shaped plate 9.

[0031] like Figure 4 As shown, anti-slip teeth 8 are provided on the opposite sides of the insertion rod 7 and the U-shaped plate 9.

[0032] In this technical solution, the anti-slip teeth 8 enhance the friction between the insertion rod 7 and the U-shaped plate 9. When the opposite sides of the insertion rod 7 and the U-shaped plate 9 approach each other and clamp the wire, it ensures that the wire will not loosen due to insufficient friction.

[0033] Working principle: First, the string is passed through the U-shaped plate 9 inside the stringing opening 3 on the side of the racket frame 1. Both ends of the string are fixed to the two winding spools 12 and tightened. The winding spools 12 are moved so that the gear 13 at one end engages with the internal gear ring 14. The threaded sleeve 10 is then connected to the mounting rod 16 via the external thread 4. Next, the baffles on both sides of the racket frame 1 are pressed, causing the movable baffle 2 to move and push the insertion rod 7 closer to the U-shaped plate 9. The anti-slip teeth 8 on opposite sides of the two plates clamp the string, preventing slippage. To prevent it from loosening, fix the movable stop 2 with the fixing bolt 5. When it is necessary to adjust the string tension, first unscrew the fixing bolt 5 and move the movable stop 2 to move the insert rod 7 towards the opening end of the U-shaped plate 9 so that the string is not squeezed. Then, rotate the threaded sleeve 10 to disengage it from the mounting rod 16, so that the winding shaft 12 drives the gear 13 to move out of the inner gear ring 14, canceling the two from being stuck together. Then, use a hex wrench to turn the hex screw 11 to drive the winding shaft 12 to rotate and adjust the string tension.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A badminton racket with automatic adjustment of string tension, comprising a racket frame (1), characterized in that: The bottom of the frame (1) is fixedly connected to a mounting block (15), and mounting rods (16) are fixedly connected to both sides of the mounting block (15). A winding spool (12) is sleeved on the outside of the mounting rod (16). A gear (13) sleeved on the mounting rod (16) is fixedly connected to one end of the winding spool (12), and a hexagonal screw (11) sleeved on the mounting rod (16) is fixedly connected to the other end. An internal gear ring (14) coaxially distributed with the mounting rod (16) is fixedly connected to both sides of the mounting block (15). The internal gear ring (14) is engaged with the gear (13). An external thread (4) is engraved on the outside of the other end of the mounting rod (16). A threaded sleeve (10) is threadedly connected to the mounting rod (16) through the external thread (4).

2. The automatic string tension-adjustable badminton racket according to claim 1, wherein: The racket frame (1) has several threading holes (3) evenly distributed on its side. A U-shaped plate (9) is fixedly connected inside the threading hole (3), and a plug rod (7) is inserted into the open end of the U-shaped plate (9).

3. The automatic string tension-adjustable badminton racket according to claim 2, wherein: The end of the insert rod (7) away from the U-shaped plate (9) extends outward and the extended end passes through the frame (1) and extends to the outside of the frame (1).

4. The badminton racket of claim 3, wherein: The frame (1) has a fixed stop (6) fixedly connected to one side and a movable stop (2) provided on the other side. The movable stop (2) is fixed to the extension end of a plurality of insert rods (7).

5. The badminton racket of claim 4, wherein: The movable guard (2) is provided with a fixing bolt (5), which is threadedly connected to the frame (1).

6. The automatic string tension-adjustable badminton racket according to claim 2, wherein: Anti-slip teeth (8) are provided on the opposite sides of the insertion rod (7) and the U-shaped plate (9).

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