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Patent Searching and Data


Title:
ELECTROSTATIC CAPACITANCE TYPE PROXIMITY SENSOR
Document Type and Number:
WIPO Patent Application WO/2021/205978
Kind Code:
A1
Abstract:
The objective of the present invention is to provide an electrostatic capacitance type proximity sensor having a novel construction, with which it is possible to reduce parasitic capacitance. An electrostatic capacitance type proximity sensor 10 for detecting proximity of a detection target A on the basis of an electrostatic capacitance is provided with a ground electrode 24 which is disposed on the opposite side of a sensor electrode 20 to the detection target A and which is grounded, and an intermediate layer 16 which is disposed between the sensor electrode 20 and the ground electrode 24, wherein: the intermediate layer 16 is provided with an electrically insulating guard supporting body 26, and a first guard electrode 28a and a second guard electrode 28b which are at the same potential as the sensor electrode 20; the first guard electrode 28a is disposed on the surface of the guard supporting body 26 facing the sensor electrode 20, and the second guard electrode 28b is disposed on the surface of the guard supporting body 26 facing the ground electrode 24; and an electrically connecting portion 32 electrically connecting the first guard electrode 28a and the second guard electrode 28b to one another is provided in the intermediate layer 16.

Inventors:
SHINHASHI YUSUKE (JP)
KURIKUMA HAJIME (JP)
ZHANG YUNWEI (JP)
Application Number:
PCT/JP2021/014127
Publication Date:
October 14, 2021
Filing Date:
April 01, 2021
Export Citation:
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Assignee:
SUMITOMO RIKO CO LTD (JP)
International Classes:
H01H36/00
Foreign References:
JP2012131473A2012-07-12
JP2007018839A2007-01-25
JP2016099284A2016-05-30
JP2012224263A2012-11-15
Attorney, Agent or Firm:
KASAI & NAKANE INTERNATIONAL PATENT FIRM et al. (JP)
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