Crimp contact device with adjusted crimping force
View Patent ↗A crimp contact device includes a crimping member. The crimping member is configured to crimp a wire, and has a first portion and a second portion which is near to an end of the crimping member than the first portion. A pressure applied to the wire by the second portion is decreased according to a direction from the first portion toward the end of the crimping member.
1. A crimp contact device, comprising:
a core wire crimping portion, which has been deformed so as to be crimped onto a wire, and having a complete compression portion and an intermediate compression portion,
wherein the intermediate compression portion is nearer to an end of the core wire crimping portion than the complete compression portion, and
wherein a pressure applied to the wire by the intermediate compression portion gradually decreases along a longitudinal direction of the crimp contact device which extends from the complete compression portion toward the end of the core wire crimping portion.
2. The crimp contact device as set forth in claim 1 , further comprising:
a base portion;
wherein the wire is sandwiched between the base portion and the core wire crimping portion,
wherein the core wire crimping portion further comprises a bell-mouth part, which includes the intermediate compression portion,
wherein the complete compression portion is elongated along a first direction,
wherein the bell-mouth part extends from the complete compression portion in a second direction which is inclined at a first angle with respect to the first direction, and
wherein a distance between the bell-mouth part and the base portion increases along the longitudinal direction of the crimp contact device.
3. The crimp contact device as set forth in claim 2 , wherein:
the wire has a transiting portion defined as an area between a first position where a diameter of the wire begins to be decreased and a second position which opposes an end of the intermediate compression portion, the end of the intermediate compression portion being opposite to the end of the core wire crimping portion, and
the first angle is larger than a second angle between the first direction and a third direction which extends from the second position to the first position.
4. The crimp contact device as set forth in claim 2 , wherein:
the wire has a transiting portion defined as an area between a first position where a diameter of the wire begins to be decreased and a second position which opposes an end of the intermediate compression portion, the end of the intermediate compression portion being opposite to the end of the core wire crimping portion, and
the first angle is substantially equal to a second angle between the first direction and a third direction which extends from the second position to the first position.
5. The crimp contact device as set forth in claim 3 , wherein:
the transiting portion has a first part including the first position and a second part including the second position,
the pressure is applied to the second part, and
no pressure is applied to the first part by the core wire crimping portion.
6. A crimping apparatus, comprising:
the crimp contact device set forth in claim 2 ;
a first die configured to apply a pressure to the core wire crimping portion, and including an end portion having tapered shape; and
a second die configured to support the base portion,
wherein the core wire crimping portion is disposed between the first die and the second die,
wherein the first angle is defined by the tapered shape.