JPH0642380B2 - Electrical connector terminal - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connector terminal, and more particularly to a terminal connected to a male terminal pin connected to an insulating coated wire.

[0002]

BACKGROUND OF THE INVENTION As is well known, it is common to use micro connectors to interconnect printed circuit board assemblies with individual conductors from other components. That is, such an electrical connection often involves mating a printed circuit board with a long male pin terminal that is electrically connected to a circuit on another printed circuit board. In this case, the prior art has found that either the male pin terminals are free or part of a pre-assembled unit, and there is no suitable connector for terminating a separate insulated wire to a long pin terminal. , Typically including an insulating housing having multiple metal terminals with contact portions.

[0003]

One of the problems of the prior art as described above is to make a terminal which can ensure the operation and reliability of operation effectively and economically because the terminal structure is complicated and minute. That is not easy. Another problem is that a relatively large force is required to mate the connector assembly and header. That is, since the terminal beam is small, the contact beam must apply a large force in the perpendicular direction to the header pin while limiting the length of the contact beam. As a result, the force for fitting the connector assembly and the header is increased. There is a problem. An object of the present invention is to solve the above problems.

[0004]

SUMMARY OF THE INVENTION The electrical connector terminal of the present invention includes an insulating coating biting contact means projecting from the upper surface of the base for terminating the base and the insulating coating wire. The contact beam is bent downwardly around the base from the insulating coating biting contact means to receive a male terminal between the base and the beam. More specifically, the electrical connector terminal of the present invention preferably comprises a metal integral structure stamped and formed from a single metal plate. The base of the terminal is a flat plate, and the insulating coating biting contact means are formed by a pair of spaced blades upright from the base plate, the slots of the blades receiving the coated conductors,
It then digs into the wire coating to make contact with the wire.
The contact beam is bent downwardly from the upper edge of one coating bite blade and inwardly of the lower side of the base plate so that the insulated conductor and the male terminal are oriented and connected in parallel. The lower leg of the contact beam is bent toward the base plate to create a two-point contact area between the far end of the beam and the base for connection with the male terminal.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT In FIG. 1, an electrical connector terminal according to an embodiment of the present invention is shown by reference numeral 10. It includes a base 12, an insulating coating biting contact means 14, and a contact beam 16. The terminal 10 is preferably embossed from a piece of metal and made as a unitary structure that is folded. The base 12 is therefore in the form of a flat plate, and the coating biting contact means 14
Are in the form of two pairs of blades 18a, 18b which stand upright from both ends of the upper surface of the base. Blades 18a, 18
Slots 20a and 20b are provided in b, and these constitute means for removing the insulation coating from around the core wire of the insulation coating conductor. As is known in the art in this direction, the width of the slots 20a, 20b is such that the insulating coating is cut off from around the core wire to make electrical contact with the core wire. The contact beam 16 is generally L-shaped and is bent down from the upper edge of the blade 18b at a portion 22 so that one L-shaped leg 24 of the beam is aligned with the blade 18b and then the other L-shaped. Legs 26 are bent around the underside of the base 12 and thus receive a male pin inserted between the beam 16 and the backside of the base 12 in the direction of arrow A. The beam legs 26 are spaced from the base 12 and bent upward toward the distal end 28 to create a two point contact area for engaging the male terminal pins. These relationships are described in detail below with reference to the remaining figures. As best shown in FIG. 2, the width of the contact beam 26 is narrower than the width of the terminal base 12. Base 12 extending laterally beyond the width of legs 26
The lateral portion of the contacts the shoulder 19 of the connector housing 38. In this way, the terminal 10 is supported, and the conductor wire 40 is pushed down into the slots 20a and 20b and bites into the insulating coating to complete the termination. 3 and 4 show a state in which the electrical connector terminal 10 is stamped and molded from a single metal plate in mass production, and is also attached to the carrier strip 30. Terminal is separation line 3
2 from the carrier strip 30. Notch 34 in leg 24 of L-shaped contact beam 16
Is the slot 20 of the coating bite blade 18a, 18b
It is much larger than a and 20b, and slot 20
FIG. 3 shows that it accepts the full width of the insulated conductor without blocking the insertion of the conductor into a, 20b. 4 shows how the contact beam 16 is bent downward from the upper edge of the blade 18b to line up with the blade, and the legs 26 are further bent along the lower surface of the base 12 to create a two-point contact area as shown at 36. ing. FIG. 5 illustrates a number of electrical connector terminals 10 mounted in a housing 38 of a connector, terminating a number of insulated wires 40, and mating with a connector header 42. When the insulation coating conductor 40 is pushed downward in the direction of the arrow B, the blades 18a, 18b of the terminal strip the conductor insulation coating as shown by 44 to terminate the conductor 40 so as to be electrically connected to the core wire 46, and thereby terminate the conductor 40. End to. At this time, the part of the base that laterally extends over the side surface of the leg 26 comes into contact with the shoulder 19 in the housing 38 that vertically supports the terminal during the bite of the coating.
Further, the header 42 is fitted to the connector assembly including the terminal 10 and the housing 38 as shown by an arrow C. In this way, the terminal pin end 45a of the terminal pin 45 is connected to the terminal 1
It is fitted and connected between the back surface of the 0 base 12 and the contact beam 16. The tails 45b of the terminal pins 45 are exposed to the outside of the header 42 to mate with auxiliary connector elements or are not shown but terminate, for example, in a circuit on a printed circuit board. 6 to 8 show how the terminal pin 45 fits with the terminal 10 over time. First, referring to FIG. The opening 50 of the housing 38 is formed for each terminal pin 45, and has an opening 52 that expands to the outside. With the legs 24 of the contact beam 16 away from the internal abutment shoulders 56 of the housing, the housing 3
The terminal 10 is mounted in the space 54 inside the terminal 8. An initial gap is thus created between the contact beam leg 24 and the abutment shoulder 56. FIG. 7 shows the initial mating condition of the terminal pin 45, with the terminal end 45 a engaging the end 28 of the leg 26 of the contact beam 16. This initial mating force in the direction of arrow D causes the contact beam legs 24 to abut the abutment shoulder 56 of the housing 38. That is, the portion indicated by reference numeral 60 is the pivot point of the leg 26 of the contact beam. In FIG. 8, the header 42 and the terminal pin 45 are moved in the direction of the arrow D so that the terminal pin 45 is completely fitted between the leg 26 of the contact beam 16 and the back surface of the base 12 of the terminal 10. During this movement, the contact beam legs 26 are perpendicular to the base 12, as indicated by arrow E,
Therefore, it moves vertically to the terminal pin 45. The vertical movement of the contact beam 16 is caused by the contact beam leg 24 abutting the shoulder 56 of the housing 38, thereby causing a pivot point 60.
Occurs with the fulcrum as a fulcrum. This movement is contact beam 16
Disperse the stress within and thereby reduce the degree of material deformation and material creep. As a result, a substantially constant force on the terminal pin 45 in the direction opposite to the arrow E by the leg 26 of the contact beam, regardless of small variations in the size of the terminal pin, which may be due to connector manufacturing tolerances. Will be added. As a result, the terminal pin 45 and the conductor wire 40 can be oriented parallel and terminated.

[0006]

As is apparent from the above description, according to the present invention, there is provided a means having high reliability in the quality of an electrical connector terminal for connecting with a male terminal having a complicated and minute terminal structure. At the same time, this type of electrical connector terminal generally requires a force that mates the connector assembly with the header because the contact beams that comprise it must exert a large perpendicular force on the male terminal of the header. It gets bigger, but it can be eliminated. Moreover, the contact pressure of the contact beam with respect to the male terminal can be made constant at all times regardless of the minute size variation of the male terminal which is considered to be caused by the manufacturing tolerance of the male terminal.

[Brief description of drawings]

FIG. 1 is a perspective view of an electric connector terminal.

FIG. 2 is a bottom view of the terminal of FIG.

FIG. 3 shows the terminal looking to the left, not shown in FIG. 1, as stamped from a metal plate and still attached to a carrier strip during the molding fabrication process.

4 is a cross-sectional view taken along the line 4-4 of FIG.

FIG. 5 is a partially cutaway perspective view of an electrical connector assembly for mating with a terminal pin header.

FIG. 6 is a developed cross-sectional view of the connector assembly of FIG. 5 and the header in a non-fitted state.

FIG. 7 is a view similar to FIG. 6, showing one of the terminal pins in the first fitted state.

FIG. 8 is a view similar to FIG. 7, showing the terminal pin fully mated with the electrical terminal of the present invention.

[Explanation of symbols]

 10 Terminals 12 Base 14 Insulating Cover Biting Contact Means 16 Contact Beams 18a, 18b Blades 20a, 20b Slots 24, 26 Contact Beam Legs 28 Far End of Contact Beam 30 Carrier Strip 34 Notch 38 Connector Housing 40 Insulating Wire 42 Connector header 45 Terminal pin 45b Tail part of terminal pin 50 Open 52

Claims (15)

[Claims] 1. A base, an insulating coating biting contact means protruding from an upper surface of the base for terminating the insulating coating conductive wire, and a back surface thereof bent downward from the coating biting contact means around a back surface of the base. And a contact beam for receiving a male terminal between the electric connector terminals. 2. The electrical connector terminal according to claim 1, wherein the connector terminal is an integral structure. 3. The electrical connector terminal according to claim 2, wherein the connector terminal is formed by stamping and molding a sheet of metal. 4. The electrical insulation according to claim 1, wherein the insulating coating biting contact means includes slot means for insulating coating biting, and the contact beam is arranged to receive the male terminal parallel to the direction of orientation of the conductor. Connector terminal. 5. The electrical connector terminal according to claim 4, wherein the contact beam is bent from an upper edge of the insulating coating biting contact means. 6. The notch of the contact beam is wider than the slot of the insulating biting contact means to receive the insulating coating wire without preventing the slot from receiving the insulating coating wire.
The electrical connector terminal described in. 7. The electrical connector terminal according to claim 1, wherein the contact beam is bent downward from an upper portion of the insulating coating biting contact means. 8. The electrical connector terminal of claim 1 wherein the free end of the contact beam is bent to create a two point contact area between the free end portion 28 and the base for connection to the male terminal. 9. An integrally formed body of stamped metal projecting from the top surface of the base for terminating the insulating coating wire, the insulating coating biting contact means, and the insulating coating biting contact means down to the bottom surface of the base. An electrical connector terminal comprising a contact beam that is bent around and receives a male terminal between itself and the lower surface thereof. 10. The electrical connector terminal of claim 9, wherein the insulation-coated bite contact means includes insulation-coated bite slot means, and the contact beam is arranged to receive the male terminal parallel to the orientation direction of the conductor. . 11. The contact beam notch is wider than the slot of the insulation digging contact means to receive the insulation coating without preventing the slot from receiving the insulation coating.
The electrical connector terminal described in 0. 12. The electrical connector terminal of claim 9 wherein the free end of the contact beam is bent to create a two point contact area between the free end portion and the base to engage the male terminal. 13. A terminal and a housing for mounting the terminal, the terminal including a base, an insulating coating biting contact means protruding from an upper surface of the base for terminating the insulating coating conductor, and the insulating coating biting contact means. Includes a contact beam that is bent downward from around the lower surface of the base to receive a male terminal between the lower surface and
The housing is provided with a contact shoulder that abuts against the contact beam so as to prevent the portion of the contact beam bent along the lower surface of the base from vertically moving away from the base due to the insertion movement of the male terminal. An electrical connector assembly characterized in that it includes. 14. The contact beam is L-shaped, one leg of the L-shaped being able to abut an abutment shoulder of the housing,
16. The electrical connector assembly of claim 15, wherein the other leg of the L-shape is the portion of the contact beam bent along the underside of the base, which portion cooperates with the base to receive the male terminal. 15. The other end of the L-shaped terminal has a near end away from the base and a far end bent toward the base between the far end and the base. The electrical connector assembly of claim 14, wherein a two point contact area is created to engage the male terminal.