JPH0513123A - Double contact - Google Patents

Abstract

PURPOSE:To provide a contact in which a sufficient contact force can be provided with a thin plate thickness because of three double beams, allowing miniaturization and absorption of the location error of a male contact, a connecting column is excellent to bending, and a surface mounting terminal can be freely designed in width and length. CONSTITUTION:Three trapezoidal beams 2a, 2b, 2c extending backward from three sides of an inlet-side box curved part 1 and three trapezoidal beams 3a, 3b, 3c extending to the inlet side from three sides of a back-side box curved part 4 are provided, and the inlet-side and back-side box curved parts 1, 4 are connected to each other through a connecting column 5. The respective corresponding trapezoidal beams 2a and 3a, 2b and 3b, 2c and 3c are mutually superposed in their top end parts thinned in plate thickness by squeezing. A contact part 8 is formed of these superposed parts. Further, the back-side box curved part 4 has a soldering terminal 7 for surface mounting extending from one side excluding the side to which the connecting column 5 is connected and the side opposite thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a female side contact of an electrical connector, and more particularly to a double-layered contact structure used as a female side contact of a card connector and a small high density connector.

[0002]

2. Description of the Related Art In recent years, electrical connectors of this type have been made smaller and more dense, and it has become difficult to secure a desired contact force as a female contact due to size and stress restrictions. Came.

In the conventional contact of this type, as shown in FIG. 3, two beams 11a and 11b extending from two opposite sides of the U-shaped bent portion 10 and a terminal portion 13 extending from the remaining one side are formed. Types, and as shown in Figure 4,
Two beams 21a, 21b and 22a, 22 extending from the two opposite sides of the inlet-side U-shaped bent portion 20 and the inner-side U-shaped bent portion 25 toward the inner side and the inlet side, respectively.
As shown in FIG. 5 which is a development view of FIG. 4, the U-shaped bent portions 20 and 25 on the inlet side and the back side having b are connected by the connecting pillar 24, and the central portion of the connecting pillar 24 is There is a type having a structure in which the terminal portion 26 is formed by cutting and raising and two beams are superposed on the entrance side and the back side respectively (for example, Japanese Utility Model Laid-Open No. 62-183371).

[0004]

Among the above-mentioned conventional contacts, the contact shown in FIG. 3 has two points of contact, and therefore the plate thickness must be increased in order to secure the contact force in a limited space. However, if the plate thickness is increased, the insertion space for the male contact is sacrificed, design / manufacturing conditions are restricted, and it is difficult to form a terminal having a spring property for surface mounting. Moreover, there is a problem that the location error of the male terminal cannot be sufficiently absorbed because the contact is only uniaxial and the inlet is U-shaped.

Further, in the contact shown in FIG. 4, the contact force can be increased by overlapping the beams without increasing the plate thickness, but the plate thickness of the overlapped portion is increased and displacement cannot be sufficiently taken. Further, the U-shaped inlet has a problem that the location error of the male terminal cannot be sufficiently absorbed. Further, since the connecting column shown in FIG. 5 is formed by cutting and raising the central portion to form a terminal, the connecting column is insufficient in strength and may buckle, and the terminal is considerably limited in length and width. There is.

[0006]

The double-layer contact of the present invention is a female contact of a connector into which a pin-shaped male contact is inserted. A trapezoidal beam of the first group, three trapezoidal beams of the second group extending from the three sides of the back side box bending portion toward the entrance side, and a connection for connecting the entrance side box bending portion and the back side box bending portion The column is provided with a contact portion formed by overlapping the trapezoidal beams of the first group and the second group of the three groups at the front end portions having thin thicknesses on the back side and the entrance side, respectively.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

1 and 2 are a perspective view and a developed view of an embodiment of the present invention.

Three trapezoidal beams 2a, 2b and 2c extending from three sides of the entrance side box bending part 1 to the back side and a back side box bending part 4 are provided.
Trapezoidal beams 3a, 3 extending from the three sides of the
b and 3c, and the box bending portions 1 and 4 on the inlet side and the back side are connected by a connecting column 5, and trapezoidal beams 2a and 3a, 2b and 3b corresponding to the three inlet sides and the back side, respectively. , 2c and 3c overlap each other at the tip portions whose plate thickness is thinned by the crushing process. The contact portion 8 is formed by the overlapping portion. Further, the back side box bending part 4 is provided with a side to which the connecting column 5 is connected and a soldering terminal 7 for surface mounting extending from one side except the side opposite to the side.

The contact of this embodiment is formed by pressing a single conductive material plate. FIG. 2 shows a developed view of the contact of this embodiment shown in FIG. 1. First, the beam tip is crushed, raised, and the engaging portion 6 is cut and raised, and then the line AA, BB. 90 ° in the order of the line and C-C line
Bend into a box. Next, the D-D line and the E-E line are folded to direct the back side box bending portion 4 toward the entrance side. And the FF line,
Bent section 1 on the inlet side by bending the GG line and the H-H line in this order
And make beams overlap each other. The contact thus formed is plated with nickel and then plated with gold.

The contact of this embodiment has a box-shaped inlet,
Since it has a structure of three-point contact or four-point contact including the connecting column, very stable contact can be obtained, and the plate thickness can be reduced if the performance is the same as in the case of two double-beams. Furthermore, since the plate thickness of the contact portion 8 which is superposed by the crushing process is made thin, a clearance to the housing wall (not shown) can be made larger than in the conventional case, and a large displacement amount can be secured. The superposed beam is advantageous in terms of stress over one beam thickened. In order to secure the same contact force with the same displacement as the two trapezoidal beams 2a and 3a, the trapezoidal beams 2a and 3 of the conventional example shown in FIG.
If it is the same as a, it must be Yara to the plate thickness ³ √2 times. Stress on the beam root Those who are ³ √2 times the single beam proportional to the thickness, i.e. it is disadvantageous is 26% higher. Therefore, a superposed beam with a sufficient amount of displacement facilitates material selection and design, and the three superposed beams can absorb the location error of the male contact in each direction. It is highly likely.

Further, the connecting column 5 is constructed by bending it from one side of the back side box bending portion 4, and is superior in mechanical strength to a connecting column by cutting out the terminal portion from the central portion as in the conventional example, and has a seat. There is no fear of buckling. In the soldered terminal 7, it is extended from one side that does not participate in the connecting column 5. In the conventional example, as described above, since the central portion of the connecting column is cut out to form the terminal portion, the shape and the length are considerably restricted. The soldering terminal 7 of the present embodiment is made thin, and a surface mounting terminal having a spring property can be configured, and the terminal has flexibility in width, length and shape.

[0013]

As described above, according to the present invention, three double-layered beams, which are more advantageous in terms of stress by 26% than single-beams, and a structure having a box-shaped entrance are provided. The plate thickness can be made thinner than in the case of two overlapping beams, and the size can be reduced. Moreover, the location error at the time of inserting the male contact can be sufficiently absorbed. In particular, since the plate thickness of the two-ply overlapping portion is reduced by crushing, a sufficient clearance with the housing wall can be obtained, and a large amount of displacement can be secured. In addition, the connecting column can secure a width close to one side of the bent portion of the box and is excellent in buckling. The surface-mounting terminals also extend from one side of the back side box bending part, and the plate width and terminal length can be freely determined, and since it is a thin plate, it also has the effect that it can be processed into a shape with spring properties. .

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a development view of the present embodiment.

FIG. 3 is a perspective view showing a contact of a first conventional example.

FIG. 4 is a perspective view showing a second conventional contact.

FIG. 5 is a development view of a second conventional example.

[Explanation of symbols]

1 Entrance side box bending part A few trapezoidal beams 4 Back side box bending part 5,24 connecting pillar 6,12,23 Locking part 7 Soldering terminals for surface mounting 8 contact points 10 U-shaped bend 11,12,22 beam 13,26 Terminal part 20 U-shaped bend on the inlet side 25 U-shaped bending part on the back side

Claims (3)

[Claims] 1. A female contact of a connector, into which a pin-shaped male contact is inserted, wherein three trapezoidal beams of a first group extending from three sides of an inlet side box bending portion to the inner side and a far side box bending portion. Three trapezoidal beams of the second group extending from the three sides to the inlet side, a connecting column connecting the inlet side box bending portion and the back side box bending portion, and the three first groups and the second group, respectively. A double-layered contact, characterized in that the trapezoidal beams of the group are provided with contact portions formed by overlapping at the back end and the entrance side at thinned tip portions. 2. The surface mounting terminal portion is projectingly provided from one side of the back side box bending portion excluding a side to which the connecting column is connected and a side opposite thereto. The two-layer contact described. 3. The double-layered contact according to claim 1, wherein the trapezoidal beam, the connection column, and the terminal portion are molded from a single conductive material plate.