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Patent Searching and Data


Title:
LIQUID SENSOR
Document Type and Number:
WIPO Patent Application WO/2017/033501
Kind Code:
A1
Abstract:
This liquid sensor for detecting whether or not a liquid is present inside a translucent tube (T) comprises: a lighting unit (37) emitting a detection light; a light receiving unit (38) facing the lighting unit (37) and receiving the detection light; and a holding member (70) provided between the lighting unit (37) and the light receiving unit (38), having a pair of elastic pieces (71A, 71B) for sandwiching the tube (T). Each of the elastic pieces (71A, 71B) has a slit (52) extending in a direction intersecting with the length direction of the elastic pieces (71A, 71B) in a different direction from the illumination direction, the slit (52) of each of the elastic pieces (71A, 71B) being disposed on the optical axis of the detection light between the lighting unit (37) and the light receiving unit (38). In addition, light blocking portions (72A, 72B, 73A, 73B) are provided for blocking a portion of the detection light exiting from the lighting unit (37) in a direction intersecting with the length direction of each of the elastic pieces (71A, 71B). The light blocking portions (72A, 72B, 73A, 73B) are provided in such a manner as to block, from among the detection light exiting from the lighting unit (37), light other than the light passing through a region in the tube (T) where the liquid passes.

Inventors:
TERAZAWA, Takumi (2431-1, Ushiyama-ch, Kasugai-shi Aichi 01, 〒4860901, JP)
Application Number:
JP2016/063607
Publication Date:
March 02, 2017
Filing Date:
May 02, 2016
Export Citation:
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Assignee:
PANASONIC INDUSTRIAL DEVICES SUNX CO., LTD. (2431-1, Ushiyama-cho Kasugai-sh, Aichi 01, 〒4860901, JP)
International Classes:
H01H35/00; G01V8/12; G01F23/292
Foreign References:
JPH11276576A1999-10-12
JP2009133747A2009-06-18
JP2012063328A2012-03-29
JPH10253425A1998-09-25
JPH08293234A1996-11-05
Attorney, Agent or Firm:
ONDA, Makoto et al. (12-1, Ohmiya-cho 2-chome Gifu-sh, Gifu 31, 〒5008731, JP)
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