Title:
CORDLESS BLIND DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/139306
Kind Code:
A1
Abstract:
Provided is a cordless blind device which can be operated in various types, including manual, semi-automatic, and automatic types. The cordless blind device comprises: a winding roll; a screen member; a driving motor for providing the winding roll with rotational driving power; a weight member connected to the lower end of the screen member so as to apply a torque in such a direction that the screen member is unwound; a torsion spring for applying an elastic force to the winding roll and thereby applying a torque in such a direction that the screen member is wound; and a rotation conversion module for transferring power in two directions between the driving motor and the winding roll. When the driving motor generates no driving power, the torque applied by the torsion spring, the torque applied by the weight member, and the resisting force from the rotation conversion module and the driving motor reach a balance, and the screen member accordingly remains stationary. If an external force is applied to the weight member in the upward or downward direction, the balance of force is broken, and the screen member is accordingly wound around the winding roll or unwound therefrom.
Inventors:
JANG SEONG-RYONG (KR)
Application Number:
PCT/KR2019/000163
Publication Date:
July 18, 2019
Filing Date:
January 04, 2019
Export Citation:
Assignee:
WINTEC KOREA INC (KR)
International Classes:
E06B9/42; E06B9/68
Foreign References:
| KR20170105568A | 2017-09-19 | |||
| JP2013520595A | 2013-06-06 | |||
| JP3149752U | 2009-04-09 | |||
| KR101774567B1 | 2017-09-05 | |||
| US20170081914A1 | 2017-03-23 | |||
| KR200480955Y1 | 2016-07-29 |
Other References:
See also references of EP 3739162A4
Attorney, Agent or Firm:
LEE, Seung-youl et al. (KR)
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