Crimp terminal, connecting structure, manufacturing method of the crimp terminal, and laser welding method

Patent metadata

Field	Value
Publication number	US-2017162953-A1
Application number	US-201715433875-A
Country	US
Kind code	A1
Filing date	Feb 15, 2017
Priority date	Aug 22, 2014
Publication date	Jun 8, 2017
Grant date	—

Abstract

A crimp terminal includes a crimp portion formed in a tubular shape with an electrically conductive the substrate and configured to crimp join with an electric wire, and a sealing portion formed at one end of the crimp portion and seals against an electric wire to be crimp joined to the crimp portion. At the sealing portion, the substrate is bent and lapped and continuously joined from one end portion to another end portion of this overlapped portion. One end of a joining trajectory is at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion.

First claim

What is claimed is:

1 . A crimp terminal comprising:
a crimp portion formed in a tubular shape with an electrically conductive the substrate and configured to crimp join with an electric wire; and a sealing portion formed at one end of the crimp portion and seals against an electric wire to be crimp joined to the crimp portion, at the sealing portion, the substrate is bent and overlapped and continuously joined from one end portion to another end portion of this overlapped portion, one end of a joining trajectory is at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion.

2 . The crimp terminal according to claim 1 , wherein
the sealing portion has two joining trajectories, a first joining trajectory is formed continuously from the one end portion of the overlapped portion to a position between the one end and the other end portion, one end thereof being at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion, a second joining trajectory overlying the first joining trajectory continuously from the other end portion of the overlapped portion, one end thereof being at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion.

3 . The crimp terminal according to claim 1 , wherein
the sealing portion has two joining trajectories, a first joining trajectory is formed continuously from the one end portion of the overlapped portion to a position between the one end and the other end portion, a second joining trajectory overlying the first joining trajectory continuously from the other end portion of the overlapped portion, one end thereof being at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion.

4 . The crimp terminal according to claim 1 , wherein the joining trajectory is at a position where one end portion is bent back on the one end portion continuously from the other end portion of the overlapped portion.

5 . The crimp terminal according to claim 1 , wherein a joining width of one end portion of the joining trajectory is smaller than a joining width of the joining trajectory at the sealing portion.

6 . The crimp terminal according to claim 5 , wherein a part of the joining trajectory at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion is smaller than a joining width of another part of the joining trajectory.

7 . A connecting structure wherein the crimp terminal and the electric wire are connected at a crimp portion of the crimp terminal according claim 1 .

8 . A crimp terminal comprising:
a crimp portion formed in a tubular shape with an electrically conductive the substrate and configured to crimp join with an electric wire; and a sealing portion formed at one end of the crimp portion and seals against an electric wire to be crimp joined to the crimp portion, at the sealing portion, an overlapped portion at which the substrate is bent and lapped is joined, a joining trajectory is formed at a distance less than from one end and another end of the overlapped portion to a sheet thickness of the substrate, one end of a joining trajectory is at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion.

9 . The crimp terminal according to claim 8 , wherein a joining width of one end portion of the joining trajectory is smaller than a joining width of the joining trajectory at the sealing portion.

10 . The crimp terminal according to claim 9 , wherein a part of the joining trajectory at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion is smaller than a joining width of another part of the joining trajectory.

11 . A method of manufacturing a crimp terminal, the method comprising:
stamping an electrically conductive the substrate to match a shape of the crimp terminal; forming a crimp portion having a tubular shape configured to crimp join with an electric wire by bending the stamped the substrate and butting end portions of the substrate with each other and joining the butted portion; and forming a sealing portion configured to seal against an electric wire to be crimp joined to the crimp portion, by bending the stamped the substrate and lapping end portions of the substrate and continuously joining the overlapped portion from one end portion to another end portion, the joining of the overlapped portion being terminated at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion.

12 . The method of manufacturing a crimp terminal according to claim 11 , comprising:
forming a first joining trajectory by joining continuously from the one end portion of the overlapped portion to a position between the one end and the other end portion and terminating at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion; and forming a second joining trajectory by overlaying on the first joining trajectory continuously from the other end portion of the overlapped portion and terminating at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion.

13 . The method of manufacturing the crimp terminal according to claim 11 , comprising:
forming a first joining trajectory by joining continuously from the one end portion of the overlapped portion to a position between the one end and the other end portion; and forming a second joining trajectory by overlaying on the first joining trajectory continuously from the other end portion of the overlapped portion and terminating at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion.

14 . The method of manufacturing a crimp terminal according to claim 11 , comprising:
joining continuously from the one end portion of the overlapped portion to the other end portion; and terminating at a position where one end portion is bent back on the one end portion side continuously on the other end portion of the overlapped portion.

15 . The method of manufacturing a crimp terminal according to claim 11 , wherein the joining of the overlapped portion is performed by laser welding, and
a laser output power for welding one end portion of the joining trajectory is lower than a laser output power for welding the sealing portion.

16 . The method of manufacturing the crimp terminal according to claim 15 , wherein a laser output power for welding a part at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion on the joining trajectory is lower than a laser output power for welding another part of the joining trajectory.

17 . The method of manufacturing a crimp terminal according to claim 11 , wherein an extending direction of the joining trajectory of the butted portion and an extending direction of the joining trajectory of the sealing portion are made to intersect.

18 . A laser welding method comprising welding a target welding region, which requires welding, by a laser continuously from one end portion to another end portion of the target welding region,
the welding with the laser being terminated a position that is deviated from the target welding region.

19 . The laser welding process according to claim 18 , wherein a laser output power for welding one end portion of the target w

Assignees

• Furukawa Electric Co Ltd
• Furukawa Automotive Systems Inc

Inventors

• Kojima Shinya
• Yagi Saburo
• Shigematsu Takashi

Classifications

• H01R4/183 Primary

  for cylindrical elongated bodies, e.g. cables having circular cross-section (H01R4/01 takes precedence) · CPC title

• H01R43/16

  for manufacturing contact members, e.g. by punching and by bending · CPC title

• H01R4/18 Primary

  by crimping {(H01R4/01, H01R4/2495 take precedence; for coaxial cables H01R9/0518)} · CPC title

• H01R4/625

  Soldered or welded connections · CPC title