US 11,742,643 B2
Corrugated tube and wire harness
Masaru Kiuchi, Shizuoka (JP)
Assigned to YAZAKI CORPORATION, Tokyo (JP)
Filed by Yazaki Corporation, Tokyo (JP)
Filed on Jun. 5, 2020, as Appl. No. 16/894,651.
Claims priority of application No. 2019-106690 (JP), filed on Jun. 7, 2019.
Prior Publication US 2020/0389000 A1, Dec. 10, 2020
Int. Cl. H02G 3/04 (2006.01); B60R 16/02 (2006.01)
CPC H02G 3/0468 (2013.01) [B60R 16/0207 (2013.01); B60R 16/0215 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A corrugated tube, comprising:
a tube body having a tubular shape and configured to accommodate an electric wire inside;
a protection layer laminated on an inner circumferential surface of the tube body; and
a coating layer laminated on an outer circumferential surface of the tube body, wherein
the tube body has at least a bellows-shaped region having projections and recesses axially alternately continuous, includes two ends circumferentially formed, and is circumferentially closed by the two ends facing or overlapping each other,
the protection layer is laminated in two end regions corresponding to the two ends, respectively, of the inner circumferential surface, terminates in each of the end regions in a circumferential direction of the tube body so that a central region of the inner circumferential surface is not laminated with the protection layer, and has a hardness lower than a hardness of the tube body, and
the coating layer is laminated in at least end regions corresponding to the two ends, respectively, of the outer circumferential surface, and has a hardness lower than the hardness of the tube body.