US 12,146,802 B2
Capacitance-based load sensor for detecting externally applied forces
Susumu Uragami, Osaka (JP); Hiroyuki Furuya, Osaka (JP); Yuta Moriura, Osaka (JP); Takashi Matsumoto, Osaka (JP); Hironobu Ukitsu, Osaka (JP); and Yodai Matsumura, Osaka (JP)
Assigned to Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Jul. 27, 2022, as Appl. No. 17/874,795.
Application 17/874,795 is a continuation of application No. PCT/JP2020/047064, filed on Dec. 16, 2020.
Claims priority of application No. 2020-011204 (JP), filed on Jan. 27, 2020; application No. 2020-020491 (JP), filed on Feb. 10, 2020; and application No. 2020-099701 (JP), filed on Jun. 8, 2020.
Prior Publication US 2022/0357220 A1, Nov. 10, 2022
Int. Cl. G01L 1/14 (2006.01); G01L 5/00 (2006.01)
CPC G01L 1/14 (2013.01) [G01L 5/0038 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A load sensor comprising:
a first base member and a second base member disposed so as to face each other;
an electrically-conductive elastic body disposed on an opposing face of the first base member; and
a conductor wire disposed between the second base member and the electrically-conductive elastic body, and configured as a plurality of element wires being twisted, wherein
each element wire is configured as an electrically-conductive member which has a linear shape and of which a surface is covered by a dielectric body, and
a twist pitch of the plurality of element wires satisfies a conditional expression below p≤12nd
where parameters in the expression are each defined as follows
p: the twist pitch of the plurality of element wires,
n: the number of the element wires included in the conductor wire, and
d: an outer diameter of each element wire.