Title:
SCREEN LIFTING DEVICE FOR ROLL BLIND
Document Type and Number:
Japanese Patent JP3247844
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To easily adjust high limit of stopping of a screen by forming a switching device to select whether to transmit the rotation of a winding axis to a screw or not from a clutch projection and a clutch hole which are moved, relative to each other, in the axial direction of the winding axis so as to engage with each other or to disengage from each other by the operation of an operation part.
SOLUTION: If a lock cap 33 is operated to move a guide projection 35 to a discontinuous part of a guide groove 31, a first clutch projection 28a only engages slightly with a clutch hole 32 to provide a stop high limit set mode. If, under such conditions, a winding axis 4 is rotated in the lifting up direction of a screen 5, the projection 28a moves over each clutch hole 32 successively. And since the response generated every time the projection 28a moves over the hole 32 corresponds to the rotational angle of 15 degrees, by counting the number of the holes 32 over which the projection 28a has passed, the rotational angles of the axis 4 can be recognized so that suspending position of the screen 5 can be easily adjusted to a desired height.
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Inventors:
Tetsuya Fujikawa
Yoshimi Aoyagi
Yoshimi Aoyagi
Application Number:
JP30063796A
Publication Date:
January 21, 2002
Filing Date:
November 12, 1996
Export Citation:
Assignee:
Tachikawa Blind Industry Co., Ltd.
International Classes:
E06B9/88; E06B9/56; (IPC1-7): E06B9/88
Domestic Patent References:
| JP7279561A | ||||
| JP8144667A | ||||
| JP843484A | ||||
| JP7301066A |
Attorney, Agent or Firm:
Hironobu Onda
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