Sumitomo Wiring Systems, Limited

Autonetworks Technologies, Limited

Sumitomo Electric Industries, Limited

Takashi Tonosaki

Satoshi Morikawa

Takeshi Aizawa

Kazuaki Takeda

Yoshihiro Uchiyama

Tetsuya Shinozaki

Shigeki Shimada

Takuya Yamanaka

Tetsuya Ito

Mitsugu Furutani

Toshikazu Sakurai

Junichi Ono

Shinji Iihoshi

Takuji Otsuka

Kenji Miyamoto

Kentaro Hirai

Toshiya Oota

Kaori Shimizu

Hiroyuki Tanaka

A press-fit terminal is provided with a press-fit portion including two contact pieces facing each other across an eye hole. Each of the two contact pieces includes a parallel portion in parallel to that of the other contact piece, a front spring portion and a rear spring portion. A thickness of the press-fit portion is 0.75 mm or more and 0.85 mm or less. When G[mm] and G[mm] denote cross-sectional secondary moment of area per unit length of the front spring portion and cross-sectional secondary moment of area per unit length of the rear spring portion for the press-fit portion, G+Gis 0.030 or more and 0.080 or less. Further, when θ denotes a gradient of the front spring portion with respect to an inserting direction of the press-fit portion, Gtan θ is 0.0024 or more and 0.0070 or less.

Press-fit terminal and connector device

A press-fit terminal includes a press-fit portion including two contact pieces facing each other with an eyehole interposed therebetween, where each of the two contact pieces includes a parallel portion, a front spring portion extending from the parallel portion in a direction in which the press-fit portion is inserted, and a rear spring portion extending from the parallel portion in a direction opposite to the direction in which the press-fit portion is inserted, the two parallel portions being parallel to each other, a thickness of the press-fit portion is 0.3 mm or more and 0.5 mm or less, when a length of the eyehole is Le [mm] and a length of the parallel portion is Ls [mm], Ls/Le is 0.57 or more and 0.65 or less, and when front spring strength is G[mm] and rear spring strength is G[mm], G/Gis 0.55 or more and 1.45 or less.

A press-fit terminal inserted into through hole of a circuit board along insertion direction includes a base portion extending in insertion direction, distal end portion, and two deformable portions. The distal end portion is on a front side to base portion in insertion direction and includes distal end portion side corner portions. The two deformable portions connect base portion and distal end portion and are contacted with an inner wall of through hole and elastically deformed. The two deformable portions include deformable portion side corner portions and deformable portion side corner portions include outer deformable portion side corner portions on outer side in direction crossing insertion direction. The two deformable portions include easy deformable portions, in portions having outer deformable portion side corner portions with curved surfaces whose radius of curvature RL is greater than a radius of curvature RS of curved surfaces of distal end portion side corner portions.

Press-fit terminal

An object is to, for physical properties, holding force, contact area, and insertion force in a trade-off relationship, set the holding force to 37 N or more, the contact area to 0.72 mm2 or more, and the insertion force to 90 N or less. A press-fit terminal is to be press-fitted into a through hole formed in a circuit board. A press-fit part includes a beam and an eye hole that is surrounded by the beam. The beam includes two parallel parts that are parallel to each other. In the press-fit part, G1/G2 is 0.20 or more and 1.05 or less where a front-side spring strength is G1 [mm3] and a rear-side spring strength is G2 [mm3] calculated under the following conditions, and G is 0.007 mm3 or more and 0.012 mm3 or less where a spring strength G [mm3] is G1+G2.

Press-fit terminal, connector for board, and board-equipped connector

A terminal () of a terminal-attached wire (), in which the terminal () is connected to an end portion of a wire () and the end portion is sealed by a heat shrinkable tube (), includes a terminal connecting portion () to be connected to a mating terminal, a wire connecting portion () to be connected to the end portion of the wire () and a coupling portion () coupling the terminal connecting portion () and the wire connecting portion () An opening end (A) of the heat shrinkable tube () is mounted on the coupling portion (), and a draining portion () for preventing adhering water from running down to the opening end (A) is provided on a side closer to the terminal connecting portion () than the opening end (A).

Terminal-attached wire and terminal

A relay terminal () made of copper or copper alloy and configured to join an aluminum wire () and a copper wire () by being electrically connected to the aluminum wire () and the copper wire () includes a first barrel portion () to be caulked and crimped to an aluminum core () of the aluminum wire () made of aluminum or aluminum alloy, which is a metal different from copper or copper alloy constituting the relay terminal (), a second barrel portion () to be caulked and crimped to a copper core () of the copper wire (), a bottom plate () configured to link the first barrel portion () and the second barrel portion (), and a projecting portion () (water drainage portion ()) provided on the bottom plate () and configured to restrict the intrusion of water from the second barrel portion () toward the first barrel portion ().

Multiple wire connecting terminal

A terminal-provided wire () includes a wire () with a core () whose end is exposed, and a terminal () crimped to the end of the core () and connectable to a mating side. The terminal () includes a front terminal portion () and a rear terminal portion (). The rear terminal portion () includes a bottom plate portion () on which the core () is to be placed, a pair of wire barrel portions () extending from the bottom plate portion () and to be crimped to the core (), an easily breakable portion () extending in an axial direction from the bottom plate portion () and to be broken at the time of disassembling, and a fixing portion () extending in the axial direction from the easily breakable portion (). The front terminal portion () includes an auxiliary crimping portion () to be placed on the bottom plate portion () in such a manner as to be sandwiched between the bottom plate portion () and the core () and to be crimped to the core () together with the wire barrel portions () to partly highly compress the core (), a fixing portion () to be fixed to the fixing portion () and a connecting portion () extending in the axial direction from the fixing portion ().

Terminal and terminal-provided wire

A female terminal fitting () is to be crimped to a wire including a core () formed by plural strands () and includes a bottom plate () on which the core () is to be placed, and a pair of crimping pieces (L,R) connected to the bottom plate () and to be crimped to the core () in such a manner as to embrace the core () placed on the bottom plate (). Butting parts of the respective crimping pieces (L,R) are formed with a thinning portion (), and a corner portion () is formed by deforming the thinning portion () when the respective crimping pieces (L,R) are crimped to the core (). Accordingly, a clearance formed at the butting parts of the respective crimping pieces (L,R) can be made smaller than in the case where the thinning portions () are not provided.

Terminal fitting

A terminal fitting () is crimped to an aluminum wire including a core () formed by putting a plurality of strands () together. The terminal fitting () includes a bottom plate () on which the core () is placed, and two barrel pieces (L,R) connected to the bottom plate () and crimped to the core () so as to embrace the core () placed on the bottom plate (). Overlapping portions (L,R) are formed on tip parts of the respective barrel pieces (L,R) by folding a plate material forming the barrel pieces (L,R) to overlap layers of the plate material. The overlapping portions (L,R) contact each other without intruding between the strands () when the respective barrel pieces (L,R) are crimped to the core (). The terminal fitting () eliminates breakage of the core () and is less affected by spring back.

Crimp type terminal fitting

A board connecting portion () of a terminal fitting () is inserted in a through hole () of a circuit board (). Two resilient deformation portions () formed at the board connecting portion () are deformed resiliently to approach each other and are held resiliently in contact with the inner periphery of the through hole (). Copper plating layers () formed on the outer surfaces of the resilient deformation portions () and a board-side tin plating layer () formed on the inner peripheral surface of the through hole () are alloyed to hold the board connecting portion () in the through hole ().

Connection structure for connecting a terminal fitting and a circuit board

A housing () has inserting portions () with projections () formed with slits (). An alignment plate () is mounted movably on the housing () and has inserting portions () that enter the slits () of the projections (). The alignment plate () is displaced relative to the housing () in the process of mounting a housing () on a board () due to interference with the board () and the inserting portions () move deeper into the slits (). The projections () widen the slits () as the inserting portions () move deeper into the slits () and hence leading ends of the projections () engage opening edges of the mounting holes () of the board () to fix the housing () to the board ().

Board connector and method of mounting it

A connector is provided with a first housing () including a leverrotatably mounted about supporting shaft bearings (), and a second housingincluding cam followers () engageable with cam groovesof the leverand to be connected with the first housing () by a cam action displayed between the cam grooves () and the cam followers () as the lever () is rotated. The second housing () includes posture correcting pins () at the opposite sides of the cam followers (). The lever () is formed with posture correcting grooves () engageable with the posture correcting pins () in a rotating process thereof and extending along arcs centered on the supporting shaft bearings ().

Lever-type connector

First and second connector housings () are connected by displacing a force multiplying member (). The first housing () includes a pair of detection terminals () and a shorting member (). The shorting member () is displaced between a shorting position where the detection terminals () are shorted and a releasing position where the detection terminals () are released from a shorted state. The force multiplying member () includes a pressing surface () that is parallel to a displacing direction of the force multiplying member (). The pressing surface () displaces the shorting member () to the shorting position in a partly connected state where the two housings () have not reached a completely connected state while displacing the shorting member () to the releasing position when the two housings () reach the completely connected state.

Connector with a connection detecting function and with a force multiplying member

A press-in hole () of a housing () is formed to be gradually wider from the front end toward the rear end, a large dimensional difference between the width of the press-in holeand that of a press-in portion () of a tab-shaped terminal () is ensured at a front end portion of the press-in hole, so that the tab-shaped terminal () can be reliably retained in the housing (). On the other hand, since the dimensional difference between the width of the press-in holeand that of the press-in portion () is small at a rear end portion of the press-in hole (), press-in resistance at an initial stage of a press-in process is reduced.

Electrical connector with reduced press-in resistance for terminals

A first housing () and a second housing () are connected by leverage brought about by the engagement of pinions () of a lever () rotatably supported on the first housing () and racksof the second housing (). In the process of rotating the lever (), cam action brought about by the engagement of cam grooves () of the lever () and cam followers () of the second housing () is exhibited. This cam action prevents the first housing () from being inclined with respect to the second housing () with engaged positions of the pinions () and the racks () as supports.

Growing community of inventors

Yokkaichi, Japan

Takashi Tonosaki