US 12,296,467 B2
Bending structural body
Takafumi Hirata, Kanagawa (JP); Yuki Hotoda, Kanagawa (JP); Masahiro Inaba, Kanagawa (JP); and Yuki Hayakawa, Kanagawa (JP)
Assigned to NHK SPRING CO., LTD., Kanagawa (JP)
Appl. No. 18/034,047
Filed by NHK SPRING CO., LTD., Kanagawa (JP)
PCT Filed Oct. 29, 2021, PCT No. PCT/JP2021/040036
§ 371(c)(1), (2) Date Apr. 26, 2023,
PCT Pub. No. WO2022/092268, PCT Pub. Date May 5, 2022.
Claims priority of application No. 2020-183190 (JP), filed on Oct. 30, 2020.
Prior Publication US 2023/0330871 A1, Oct. 19, 2023
Int. Cl. B25J 18/06 (2006.01); B25J 9/10 (2006.01)
CPC B25J 18/06 (2013.01) [B25J 9/104 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A bending structural body, comprising:
an inner cylinder which comprises a first inner coil part and a first outer coil part, and in which wound parts corresponding to the first inner coil part are fitted to spaces between adjacent wound parts of the first outer coil part;
an outer cylinder which covers at least part of an outer circumference of the inner cylinder with a space therebetween and comprises a second inner coil part and a second outer coil part, and in which wound parts corresponding to the second inner coil part are fitted to spaces between adjacent wound parts of the second outer coil part; and
wires which are inserted into and guided by the space between the inner cylinder and the outer cylinder in an axial direction; and
edge members attached to both ends of either one or both of the outer cylinder and the inner cylinder,
wherein each of the edge members has a first insertion hole penetrated therethrough for inserting the wires.