TRANSMISSION STOPPING DEVICE FOR CORDLESS CURTAIN

Abstract

A transmission stopping device for a cordless curtain includes a box assembly and a stop wheel assembly disposed in the box assembly. The stop wheel assembly includes a torsion wheel and a stop wheel. The stop wheel is provided with balls therein. A rotation-stopping assembly is provided between the stop wheel and the box assembly. The cooperation between the balls of the stop wheel and the rotation-stopping assembly in the box assembly ensures that the ascent and descent of a curtain achieves an accurate positioning.

Claims

1. A transmission stopping device for a cordless curtain, comprising a box assembly and a stop wheel assembly transversely disposed in the box assembly, the stop wheel assembly including a torsion wheel and a stop wheel, the torsion wheel and the stop wheel being arranged side by side and meshed with each other, the box assembly including an upper cover and a lower cover, the torque wheel and the stop wheel each including a wheel body and a wheel body rotating shaft, the wheel body rotating shaft being disposed at a center of the wheel body, the wheel body rotating shaft being hollow, the lower cover being provided with a lower cover shaft corresponding in position to the wheel body rotating shaft, a cavity being provided in a center of the lower cover shaft, the upper cover being provided with an upper cover shaft corresponding in position to the wheel body rotating shaft, an outer diameter of the upper cover shaft being less than an inner diameter of the cavity of the lower cover shaft, the stop wheel being provided with balls therein, a rotation-stopping assembly being provided between the stop wheel and the box assembly.

2. The transmission stopping mechanism as claimed in claim 1, wherein the rotation-stopping assembly includes a brake chamber disposed at one end of the stop wheel close to the lower cover, the brake chamber is provided with three curved walls integrally formed with the brake chamber and arranged along a circumference thereof, the curved walls are provided with hook-shaped walls integrally formed with the curved walls and equiangularly arranged, the balls are disposed in the hook-shaped walls respectively, the stop wheel is provided with a brake chamber lid, the brake chamber lid is provided with a stop disc having an outer diameter slightly less than a circumference of the curved walls, and the stop disc is provided with stop notches equiangularly arranged.

3. The transmission stopping mechanism as claimed in claim 2, wherein another end of the stop wheel, opposite to the end provided with the brake chamber, is provided with a torsion spring, one end of the torsion spring, close to the upper cover, is an engaging end, the engaging end is tangent to the wheel body rotating shaft, the upper cover is provided with an annular wall around the upper cover shaft, the annular wall is provided with a notch corresponding in shape to the engaging end, and the engaging end is engaged with the notch.

4. The transmission stopping mechanism as claimed in claim 2, wherein the number of the balls is three.

5. The transmission stopping mechanism as claimed in claim 1, wherein the lower cover and the upper cover are connected through a plug-in connector.

6. The transmission stopping mechanism as claimed in claim 2, wherein the lower cover and the upper cover are connected through a plug-in connector.

7. The transmission stopping mechanism as claimed in claim 3, wherein the lower cover and the upper cover are connected through a plug-in connector.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG. 1 is a perspective view in accordance with a preferred embodiment of the present invention;

[0018] FIG. 2 is an exploded view in accordance with the preferred embodiment of the present invention;

[0019] FIG. 3 is a schematic view showing the internal structure of the upper cover in accordance with the preferred embodiment of the present invention;

[0020] FIG. 4 is a first schematic view showing the structure of the stop wheel in accordance with the preferred embodiment of the present invention;

[0021] FIG. 5 is a second schematic view showing the structure of the stop wheel in accordance with the preferred embodiment of the present invention; and

[0022] FIG. 6 is a schematic view showing the brake chamber lid in accordance with the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.

[0024] Referring to FIG. 1 to FIG. 6, the present invention discloses a transmission stopping device for a cordless curtain. The transmission stopping mechanism comprises a box assembly 1 and a stop wheel assembly 2 transversely disposed in the box assembly 1. The stop wheel assembly 2 includes a torsion wheel 21 and a stop wheel 22. The torsion wheel 21 and the stop wheel 22 are arranged side by side and meshed with each other. The box assembly 1 includes an upper cover 11 and a lower cover 12. The torque wheel 21 and the stop wheel 22 each include a wheel body 23 and a wheel body rotating shaft 24. The wheel body rotating shaft 24 is disposed at the center of the wheel body 23. The wheel body rotating shaft 24 is hollow. The lower cover 12 is provided with a lower cover shaft 121 corresponding in position to the wheel body rotating shaft 24. A cavity 122 is provided in the center of the lower cover shaft 121. The upper cover 11 is provided with an upper cover shaft 111 corresponding in position to the wheel body rotating shaft 24. An outer diameter of the upper cover shaft 111 is less than an inner diameter of the cavity 122 of the lower cover shaft 121. The stop wheel 22 is provided with balls 25 therein. A rotation-stopping assembly is provided between the stop wheel 22 and the box assembly 1. The rotation-stopping assembly includes a brake chamber 31 disposed at one end of the stop wheel 22 close to the lower cover 12. The brake chamber 31 is provided with three curved walls 32 integrally formed with the brake chamber 31 and arranged along the circumference. The curved walls 32 are provided with hook-shaped walls 33 integrally formed with the curved walls 32 and equiangularly arranged. The balls 25 are disposed in the hook-shaped walls 33, respectively. The stop wheel 22 is provided with a brake chamber lid 221. The brake chamber lid 221 is provided with a stop disc 222 having an outer diameter slightly less than the circumference of the curved walls 32. The stop disc 222 is provided with stop notches 223 equiangularly arranged. Another end of the stop wheel 22, opposite to the end provided with the brake chamber 31, is provided with a torsion spring 26. One end of the torsion spring 26, close to the upper cover 11, is an engaging end 261. The engaging end 261 is tangent to the wheel body rotating shaft 24. The upper cover 11 is provided with an annular wall 112 around the upper cover shaft 111. The annular wall 112 is provided with a notch 113 corresponding in shape to the engaging end 261. The engaging end 261 is engaged with the notch 113. The number of the balls 25 is three. The lower cover 12 and the upper cover 11 are connected through a plug-in connector.

[0025] Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.