Non-pressure type training tennis ball with rope

Abstract

The utility model relates to the technical field of training tennis balls, in particular to a non-pressure type rope training tennis ball which comprises a tennis ball body, an installation opening is formed in the bottom of the tennis ball body, a connecting assembly is arranged in the tennis ball body and comprises an inner supporting block, and the inner supporting block is fixedly installed in the tennis ball body. A threaded opening is fixedly formed in the top of the inner supporting block, an inner installation block is installed in the installation opening, a clamping opening is formed in the inner installation block, a connecting block is knotted and sleeved with a belt rope, the connecting block is connected to the threaded opening in a threaded mode through a threaded head, and therefore the belt rope can be conveniently installed, and the connecting block is installed in the installation opening and a section of the connecting block is reserved outwards. And the springs are connected into the side blocks, so that when the connecting blocks enter the mounting ports, the springs drive the side blocks to be clamped into the bayonets, the connecting blocks are conveniently taken out during rotation, and the mounting firmness effect of the whole connecting blocks is further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of tennis training, in particular to a pressure-free training tennis ball with a rope. Background Art

[0002] To practice tennis with a rope, you only need to fix the other end of the elastic rope. After hitting the tennis ball, it can automatically recover elastically, which is convenient for practice.

[0003] According to the publication number: "CN202620637U", a pressure-free tennis ball with a rope for training includes a pressure-free tennis ball and an elastic long rope connected to the tennis ball at one end. The surface of the tennis ball is provided with a through hole, and an inner support is placed in the inner cavity of the tennis ball. The end of the elastic long rope is inserted into the through hole and fixedly connected to the inner support, forming an anti-falling structure. The inner support of the utility model is placed in the inner cavity of the tennis ball, and the end of the elastic long rope only needs to be firmly connected to the inner support. Even if it is hit hard during practice, the inner support cannot fall off from the inner cavity of the tennis ball, so that the connection reliability of the elastic long rope and the tennis ball is very high, and the rope training can be carried out for a long time, and the elastic automatic recovery function of the tennis ball is maintained, which is convenient for practice.

[0004] However, in actual use, the entire belt rope is not convenient to replace, and the internal connectors of the tennis ball are not removable. If damage occurs, the entire tennis ball needs to be replaced. Therefore, improvements have been made based on the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a pressure-free training tennis ball with a rope to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A pressure-free training tennis ball with a rope, comprising: a tennis ball, a mounting opening is provided at the bottom of the tennis ball, a connecting assembly is provided inside the tennis ball, and is used for installing and replacing the inner structure of the tennis ball;

[0008] The connecting assembly comprises an inner support block, which is fixedly mounted inside the tennis ball. A threaded opening is fixedly mounted on the top of the inner support block, an inner mounting block is mounted inside the mounting opening, and a bayonet is provided on the inner mounting block.

[0009] Preferably, the number of the bayonet holes is four groups, and the four groups of bayonet holes are symmetrically arranged around the inner wall of the inner mounting block at equal intervals.

[0010] Preferably, the outer wall of the tennis ball is provided with Velcro, and a reflective strip is adhered to the Velcro, so as to enhance the overall night vision effect.

[0011] Preferably, the connection assembly comprises a connection block, a threaded head is provided on the top of the connection block, a spring is fixedly connected inside the connection block, and an extended end of the spring is fixedly connected to a side block.

[0012] Preferably, there are four groups of side blocks, which are symmetrically arranged around the outer wall of the connecting block, and the corners of the side blocks are rounded. A spring is connected inside the side block so that when the connecting block enters the installation port, the spring drives the side block to fit into the port, and the connecting block can be easily removed when rotated, thereby further enhancing the installation firmness of the overall connecting block.

[0013] Preferably, a through hole is opened inside the connecting block, and a belt rope is arranged inside the connecting block, the belt rope is elastically arranged, and the number of the inner support blocks is two groups, which are symmetrically installed at both ends of the inner wall of the tennis ball.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. By tying a knot on the connecting block and putting it into the belt rope, the threaded head is threadedly connected to the threaded port, thereby facilitating the installation of the belt rope, and the connecting block is installed in the installation port with a section left outward to facilitate the replacement of the connecting block. A spring is connected inside the side block so that when the connecting block enters the installation port, the spring drives the side block to be clamped into the clamping port, and the connecting block is convenient to be taken out when it is rotated, thereby further enhancing the installation firmness of the overall connecting block.

[0016] Second, the connection with rope inside the tennis ball is convenient for replacement, so that the connection can be replaced according to the wear and tear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the main cross-sectional structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the enlarged structure of A in the utility model.

[0021] In the figure: 1. tennis ball; 2. connecting assembly; 211. connecting block; 212. threaded head; 213. side block; 214. belt rope; 221. inner support block; 222. threaded opening; 223. inner mounting block; 224. bayonet; 3. reflective strip; 4. mounting opening. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the actual use of the prior art, the overall belt rope is not convenient to replace, and the internal connecting parts of the tennis ball are not detachable. If damaged, the entire tennis ball needs to be replaced. Therefore, improvements have been made based on the above-mentioned problems.

[0024] like Figure 1-4 As shown, a pressure-free training tennis ball with a rope comprises: a pressure-free training tennis ball with a rope, characterized in that it comprises: a tennis ball 1, a mounting opening 4 is provided at the bottom of the tennis ball 1, and a connecting component 2 is provided inside the tennis ball 1 for installing and replacing the inner structure of the tennis ball;

[0025] The connecting assembly 2 includes an inner support block 221, which is fixedly installed inside the tennis ball 1. A threaded opening 222 is fixedly installed on the top of the inner support block 221. An inner mounting block 223 is installed inside the mounting opening 4, and a bayonet 224 is provided on the inner mounting block 223.

[0026] Specifically, the threaded head 212 is threadedly connected to the threaded opening 222, thereby facilitating the installation of the belt rope 214, and the connecting block 211 is installed in the installation opening 4 with a section left outward to facilitate the replacement of the connecting block 211. A spring is connected to the side block 213 so that when the connecting block 211 enters the installation opening 4, the spring drives the side block 213 to be clamped into the clamping opening 224. When rotating, it is convenient to remove the connecting block 211, thereby further enhancing the installation firmness of the overall connecting block 211.

[0027] like Figure 1-4As shown, there are four groups of bayonet holes 224, which are symmetrically arranged around the inner wall of the inner mounting block 223 at equal intervals. The outer wall of the tennis ball 1 is provided with Velcro, and the reflective strip 3 is adhered to the Velcro. The overall night vision effect is enhanced by the reflective strip 3. The connecting component 2 includes a connecting block 211. A threaded head 212 is provided on the top of the connecting block 211. A spring is fixedly connected inside the connecting block 211, and an extended end of the spring is fixedly connected to a side block 213. The number of side blocks 213 is four groups. The four groups of side blocks 213 are symmetrically arranged around the outer wall of the connecting block 211, and the corners of the side blocks 213 are rounded. The spring is connected inside the side block 213 so that when the connecting block 211 enters the installation port 4, the spring drives the side block 213 to snap into the bayonet 224. When rotating, it is convenient to take out the connecting block 211, further enhancing the installation firmness of the overall connecting block 211. A through hole is provided inside the connecting block 211, and a belt rope 214 is provided inside the connecting block 211. The belt rope 214 is elastically arranged. The number of inner support blocks 221 is two groups, which are symmetrically installed at both ends of the inner wall of the tennis ball 1.

[0028] Specifically, the connection piece of the inner belt rope 214 of the tennis ball 1 is conveniently replaced, so that the connection can be replaced according to the wear condition.

[0029] The working principle of the utility model is as follows:

[0030] The tennis ball 1 is provided with a connecting assembly 2, and an inner supporting block 221 and a threaded opening 222 are installed inside the tennis ball 1. When in use, the connecting block 211 is knotted and inserted into the belt rope 214, and the threaded head 212 is threadedly connected to the threaded opening 222, so as to facilitate the installation of the belt rope 214. The connecting block 211 is installed in the installation opening 4 and a section is left outside to facilitate the replacement of the connecting block 211. An inner mounting block 223 is installed inside the installation opening 4, and a bayonet 224 is opened on the inner mounting block 223, and a side block 213 is provided on the connecting opening, and a spring is connected inside the side block 213 so that when the connecting block 211 enters the installation opening 4, the spring drives the side block 213 to be clamped in the bayonet 224, and the connecting block 211 is conveniently taken out when rotating, thereby further strengthening the installation firmness of the overall connecting block 211, and the connecting piece of the belt rope 214 inside the tennis ball 1 is convenient to replace, so as to facilitate the replacement and connection according to the wear condition.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A pressure-free tennis ball with a rope for training, characterized in that: include: A tennis ball (1), wherein a mounting opening (4) is provided at the bottom of the tennis ball (1), and a connecting assembly (2) is provided inside the tennis ball (1) for installing and replacing the internal structure of the tennis ball; The connection assembly (2) comprises an inner support block (221), the inner support block (221) being fixedly mounted inside the tennis ball (1), a threaded opening (222) being fixedly mounted on the top of the inner support block (221), an inner mounting block (223) being mounted inside the mounting opening (4), and a bayonet (224) being provided on the inner mounting block (223).

2. A pressure-free tennis ball with a rope for training according to claim 1, characterized in that: The number of the bayonet holes (224) is four groups, and the four groups of bayonet holes (224) are symmetrically arranged at equal intervals around the inner wall of the inner mounting block (223).

3. The pressure-free rope training tennis ball according to claim 1, characterized in that: The outer wall of the tennis ball (1) is provided with Velcro, and a reflective strip (3) is adhered to the Velcro.

4. The pressure-free rope training tennis ball according to claim 1, characterized in that: The connection assembly (2) comprises a connection block (211), a threaded head (212) is provided on the top of the connection block (211), a spring is fixedly connected inside the connection block (211), and an extended end of the spring is fixedly connected to a side block (213).

5. The pressure-free training tennis ball with a rope according to claim 4, characterized in that: The number of the side blocks (213) is four groups, and the four groups of side blocks (213) are symmetrically arranged around the outer wall of the connecting block (211), and the corners of the side blocks (213) are rounded.

6. The pressure-free rope training tennis ball according to claim 4, characterized in that: A through hole is provided inside the connection block (211), and a belt rope (214) is arranged inside the connection block (211), and the belt rope (214) is elastically arranged.

7. The pressure-free rope training tennis ball according to claim 1, characterized in that: The inner support blocks (221) are provided in two groups and are symmetrically mounted at two ends of the inner wall of the tennis ball (1).

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