Rotation control device for pet leash

[0001] 1. Field of Invention

[0002] The present invention relates to a pet leash, and more particularly to a rotation control device connected to a pet leash for locking and unlocking the winding machine of pet leash.

[0003] 2. Description of Related Arts

[0004] The pet leash includes a rotation control device, which can lock and unlock the winding machine of the pet leash. In order to lock the winding machine, the present winding machine of the pet leash needs to press a locking button, and needs to press another auxiliary button to finish the locking process. Therefore two actions must be cooperated to lock the winding machine of the pet leash, which is inconvenient for the user.

[0005] An object of the present invention is to provide a rotation control device for pet leash, which overcomes the above mentioned drawback, and is convenient for use.

[0006] Accordingly, in order to accomplish the above object, the present invention provides a rotation control device for pet leash, which comprises a casing, a cover, and a wheel disposed in the casing. A locking button, an unlocking button, and a self lock slider are provided on the case, and are connected with a locking spring, an unlocking spring, and a self lock spring respectively. The unlocking button has an unlocking retaining hole having a position corresponding to an unlocking column on the casing.

[0007] The unlocking button comprises an unlocking retaining pole, which is inserted into an unlocking sliding groove of the casing. The locking button has a locking retaining rectangular hole having a position corresponding to a locking column on the casing. The self lock slider comprises a self lock retaining pole, which is inserted into a self lock sliding groove in the casing, wherein the self lock retaining pole is against an unlocking retaining pole.

[0008] The locking button, the unlocking button, and the self lock slider are capable of removing within a predetermined distance. After the locking button is pressed, the self lock slider locks the locking button, so as to lock the pet leash. After the unlocking button is pressed, the unlocking button pushes the self lock slider to unlock the unlocking button, so as to unlock the pet leash. During the operation, the springs are rebounded repeatedly.

[0009] Therefore, using the present invention, the user presses the locking button to lock the pet leash, and presses the unlocking button to unlock the pet leash, which is reasonable, simple and convenient.

[0010] These and other objectives, features, and advantages of the present invention will become apparent from the following detailed description, the accompanying drawings, and the appended claims.

[0015] Referring to FIG. 1 of the drawings, a rotation control device for pet leash according to a preferred embodiment of the present invention is illustrated, in which the rotation control device for pet leash comprises a casing 1, a cover 10 and a wheel 2 disposed in the casing. A locking button 5, an unlocking button 4, and a self lock slider 3 are provided on the case 1, and are connected with a locking spring 52, an unlocking spring 43, and a self lock spring 32 respectively. The unlocking button 4 has an unlocking retaining hole 41 having a position corresponding to an unlocking column 14 on the casing.

[0016] The unlocking button comprises an unlocking retaining pole 42, which is inserted into an unlocking sliding groove 15 of the casing 1. The locking button 5 has a locking retaining rectangular hole 51 having a position corresponding to a locking column 16 on the casing 1. The self lock slider 3 comprises a self lock retaining pole 31, which is inserted into a self lock sliding groove 12 in the casing 1, wherein the self lock retaining pole 31 is against an unlocking retaining pole 42.

[0017] As shown in FIG. 1 and FIG. 2 of the drawings, the locking spring 52 is disposed in locking button 5, the locking retaining rectangular hole 51 receives the locking column 16 of the casing 1, and the locking spring 52 is against the locking column 16 at one end. The unlocking spring 43 is disposed in unlocking button 4, the unlocking retaining hole 41 receives the unlocking column 14 of the casing 1, and the unlocking spring 43 is against the locking column 14 at one end. And the unlocking retaining pole 42 is inserted into an unlocking sliding groove 15 of the casing 1 to ensure the unlocking button 4 moving smoothly. The self lock spring 32 is disposed into the self lock slider 3. The self lock retaining pole 31 of the self lock slider 3 is inserted into a self lock sliding groove 12. The self lock retaining pole 31 is against the unlocking retaining pole 42 of the unlocking button, so as to limit the moving distance of the self lock slider 3. The self lock spring 32 of the self lock slider 3 is against a locating plate 13 at one end.

[0018] As shown in FIG. 3, a locking status of the rotation control device for pet leash of the present invention is illustrated. When the locking button 5 is pressed to a certain extent driving the self lock slider 3 to slide, and when the locking button 5 is pressed to a maximum extent, the self lock spring 32 rebound the self lock slider 3 to its original position. Then the locking button 5 is locked by the self lock slider 3, so as to realize the locking function.

[0019] As shown in FIG. 4, an unlocking status of the rotation control device for pet leash of the present invention is illustrated. When the unlocking button 4 is pressed driving the self lock slider 3 to slide, and when the unlocking button 4 is pressed to a certain extent, the locking button 5 is not locked by the self lock slider 3, and the locking button 4 is rebounded to its original position and the unlocking button rebounded to its original position too, so as to realize the unlocking function of the present invention.

[0020] One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting.

[0021] It will thus be seen that the objects of the present invention have been fully and effectively accomplished. It embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.