Crank structure for a curtain

Active Publication Date: 2020-08-27
ABO WINDOW FASHION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a crank structure for a curtain with improvements. The crank structure has a base, rolling wheel set, engagement set, and crank. The rolling wheel set is connected to the crank and has two rolling wheels with braking gear and inclined ring. The engagement set has a socket, supporting wheel, and bottom member. The bottom member is secured at the bottom of the crank and has a limiting column. The crank is disposed in the storing space of the limiting frame and has a cover and arm. The cover is provided with two assembling columns coupling with the two assembling apertures of one of the rolling wheels. The technical effects of the invention are improved efficiency, smooth operation, and durability of the crank structure for a curtain.

Problems solved by technology

However, the falling length of the pull cord is easy to float with the wind, which often causes the entanglement and knotting of the pull cord, and affects the normal operation of the curtain.
Furthermore, long hanging cords are mostly made of strong ropes or chains, it is also common for young children in the family to pull the ropes to play with the curtains and cause accidents.

Method used

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  • Crank structure for a curtain
  • Crank structure for a curtain
  • Crank structure for a curtain

Examples

Experimental program
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Effect test

Embodiment Construction

[0016]First, please refer to FIGS. 1, 2, and 3. A crank structure for a curtain comprises: a base 10, a rolling wheel set 20, an engagement set 30 and a crank 40. The base 10 has a bottom plate 11 and a tear-shaped limiting frame 12, and the limiting frame 12 has a round shaped storing space 13 with a central shaft 14. The central shaft 14 further has a center screw hole 141, two convex members 142 around the center screw hole 141, and a positioning member 15. The positioning member 15 has a through aperture 151 and two concave holes 152. An exit channel 16 is disposed above the storing space 13 and is provided with a plurality of vertical ribs 161 and a stepped portion 162 for coupling with a sleeve 163. The limiting frame 12 is further provided with an assembling portion 17 connected to the storing space 13 and having a groove 171. An orifice and two assembling screw holes are provided at the bottom of the groove 171. The groove 171 is further provided with a vertical slot 173 and...

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PUM

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Abstract

A crank structure for a curtain has a base, a rolling wheel set, an engagement set and a crank. The base has a bottom plate and a limiting frame. The rolling wheel set is disposed in the storing space of the base and has two rolling wheels. Each central aperture is jacketed onto the central shaft of the storing space. The two rolling wheels is further respectively provided with a braking gear and an inclined ring. Each inclined ring has a plurality of engagement ribs. The engagement set disposed in the assembling portion of the base and has a socket, a supporting wheel and a bottom member. An engaging pattern is provided at a periphery of the supporting wheel, a passive gear is provided at the supporting wheel, and a shaft is provide at a center position of the supporting wheel.

Description

BACKGROUND OF INVENTION1. Field of Invention[0001]The present invention relates to cutrains, and more particularly to a crank structure for a curtain.2. Description of the Related Art[0002]Accordingly, curtains are used in modern living rooms, mainly for shading and privacy protection. They are also used to embellish and decorate living area and even highlight the style. However, in order to facilitate the unfolding and winding of the curtains, the modern curtains need to corporate with a pull cord to lift and lower of the curtain blades. However, the falling length of the pull cord is easy to float with the wind, which often causes the entanglement and knotting of the pull cord, and affects the normal operation of the curtain. Furthermore, long hanging cords are mostly made of strong ropes or chains, it is also common for young children in the family to pull the ropes to play with the curtains and cause accidents.[0003]Therefore, it is desirable to provide a vertical blinds structu...

Claims

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Application Information

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IPC IPC(8): E06B9/322F16H1/06
CPCE06B9/322F16H1/06E06B9/78E06B2009/785
InventorCHUANG, SHAN-CHI
OwnerABO WINDOW FASHION CORP