Title:
動力伝達装置および遮蔽装置
Document Type and Number:
Japanese Patent JP7274371
Kind Code:
B2
Abstract:
To provide a power transmission device and a shading device that enable improved responsiveness in preventing a shading member from falling under its own weight.SOLUTION: The power transmission device comprises: a connecting member 35 that is rotated by input from an operating part; an output member 52 to which a drive shaft 12 is connected and which is disposed in the direction of the extension of a connecting part 35b; and a drum 53 which rotates in unison with the connecting member 35 and which can be selectively switched between a connected state and a disconnected state for connection to and disconnection from the output member 52 when moving in the direction of the rotation axis. The drum 53 is provided with a guide groove 61 that continues in the circumferential direction on the outer circumferential surface, and balls 55a and 55b that engage the guide grooves 61 between the drum 53 and the cover 54 that covers the drum 53. The guiding groove 61 has a first switching groove section that moves the drum 53 from the connected state to the disconnected state, a disconnection groove section that maintains the drum in the disconnected state, a second switching groove section that moves the drum from the disconnected state to the connected state, and a plurality of pocket sections that prevent the drum 53 from rotating in the direction of the descent of a shading member in the connected state.SELECTED DRAWING: Figure 12
Inventors:
Tadashi Okamura
Application Number:
JP2019128730A
Publication Date:
May 16, 2023
Filing Date:
July 10, 2019
Export Citation:
Assignee:
Tachikawa Blind Industry Co., Ltd.
International Classes:
E06B9/322; E06B9/84; F16D11/14; F16H1/28
Domestic Patent References:
| JP2017101466A | ||||
| JP2018017020A | ||||
| JP5179878A |
Foreign References:
| US20120048485 |
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Hironobu Onda