JPH09199199A - Electric connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the short circuit and drop of contacts without using a molded housing by forming at least two contacts separated from each other among the contacts held at the prescribed intervals as latches to be locked with the holes of a substrate. SOLUTION: When an electric connector 10 and a base plate are to be connected together, the connector 10 is advanced so that the end edge of the base plate is inserted into the curve sections 12, 13. The curve sections 12, 13 and contact sections 14, 15 are elastically deformed after the insertion, and sufficient contact pressure is generated. Latches 16, 17 are inserted into the holes of the base plate, the connector 10 is positioned at the prescribed position of the base plate, the contact sections 14, 15 are matched with conductive pads on the base plate, and a drop stop means is applied to the connector 10.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an electrical connector for receiving an edge of a substrate.

[0002]

BACKGROUND OF THE INVENTION Electrical connectors that receive the edges of a circuit board typically consist of a plurality of contacts that contact the electrical pads on the circuit board and a molded insulating housing that contains these contacts. is there. However, since the molded insulating housing has a relatively high rigidity, the insulating housing may not be able to sufficiently follow the deformation such as the warp of the circuit board, and there is a limit in reducing the material cost and the assembly cost. . Therefore, an electric connector using a web made of an insulating film instead of the molded insulating housing has been proposed. FIG. 7 is a perspective view showing such an electrical connector (see Japanese Patent Laid-Open No. 50-101890).

The electrical connector 100 comprises a large number of elastic contacts 102 and an insulating film 104,
The contact 102 formed by punching and bending is fixed to the insulating film 104 in a state in which the contacts 102 are parallel to each other and arranged at predetermined intervals. The contact 102 has at least one curved portion 106 that receives an edge of the substrate 108.
One (two contacts are shown). Insulating film 1
Since 04 has flexibility, the electrical connector 100 can follow the deformation of the substrate 108.

[0004]

In the case of an electrical connector using a molded housing, the circuit board is provided with positioning means for positioning both side edges of the circuit board at both ends of the opening for receiving the circuit board. The top conductive pads and contacts can be aligned. However, the electrical connector 100 using the insulating film 104
In this case, since the positioning means is not provided, the adjacent conductive pads 110 and 112 on the substrate 108 may be short-circuited by the single contact 102. Further, there is a possibility that the electric connector 100 may fall off the board due to vibration or the like.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an electrical connector which does not have a molded housing but allows contacts to be positioned on conductive pads on a substrate.

[0006]

In the electrical connector of the present invention, a plurality of elastic elongated contacts are arranged in parallel with each other at a predetermined interval by an insulating film, and at least a curved portion for receiving an edge of a substrate is provided. In the electric connector having one, at least two of the contacts, which are spaced apart from each other, are formed as latches that engage with holes formed in the substrate.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the electrical connector of the present invention will be described below with reference to the accompanying drawings. FIG.
FIG. 1 is a perspective view showing an embodiment of an electric connector of the present invention. FIG. 2 is a development view of the electrical connector of FIG. FIG. 3 is a perspective view showing the electrical connector of FIG. 1 and a board to be connected. FIG. 4 is a perspective view showing a connection state of the electric connector and the board of FIG. FIG. 5 is a sectional view taken along the line VV of FIG. FIG. 6 is a sectional view taken along line VI-VI of FIG.

In FIG. 1, the electrical connector 10 comprises a plurality of elongated contacts 22 parallel to each other and two insulating resin films 21 for laminating both surfaces of the contact 22 except both ends of the contacts 22. Become. The contact 22 is preferably made of phosphor bronze in consideration of the formability in the forming step described later, the elasticity of the curved portions 12 and 13, and the conductivity, but beryllium copper or the like having a better spring characteristic may be used. The cross-sectional shape of the contact 22 is rectangular, but it may be circular or another shape. The resin film 21 is preferably PVC, but PE
Other resins such as T may be used. In the preferred embodiment, the contacts 22 have a 0.3 mm × 0.2 mm rectangular cross section or a 0.3 mm diameter circular cross section and are arranged at a 0.6 mm pitch. The film thickness of the resin film is 0.5 mm.

The illustrated electrical connector 10 includes curved portions 12 and 13 for receiving the edges of two printed circuit boards (hereinafter simply referred to as substrates) 30 and 40, and the curved portions 12 and 13.
And a connecting portion 11 having elasticity for connecting 13 together. A contact portion 14 in which a contact 22 projects from the tip of the resin film 21 and is bent inward of the curved portions 12 and 13,
15 extends. Two of the contacts 22 at both ends serve as latches 16 and 17 for the substrates 30 and 40, as will be described later.

In the manufacturing process of the electric connector 10, first, a plurality of metal wire rods to be the contacts 22 are arranged in parallel with each other, and the resin films 21 are arranged on both surfaces of them and thermocompression bonding is performed, whereby the flat shown in FIG. The cable 20 is manufactured. The plurality of contacts 22 may be formed by punching out a metal plate. Next, the flat cable 20 is shown in FIG.
Form into the shape shown in. Forming is
It is also possible to form all the contacts 22 continuously by roll forming or the like and then form the contacts 22 at both ends to be the latches 16 and 17. Latches 16 and 17
The contact 22 to be formed has a smaller bending angle than the other contacts 22 and is formed so as to be easily locked to the inner walls of the holes 31 and 41 (see FIG. 6) of the substrates 30 and 40.

To interconnect the electrical connector 10 and the substrates 30, 40, the curved portions 12, 13 of the electrical connector 10 are to be interconnected.
The electric connector 10 is inserted in the direction of the arrow in FIG. 3 so that the edges of the substrates 30 and 40 are inserted therein. Curved part 1
When the substrates 30 and 40 are inserted into the bending portions 1 and 2, the bending portion 1
Since the elastic members 2, 13 and the contact portions 14, 15 are elastically deformed, a sufficient contact pressure is generated between the contact portions 14, 15 and the conductive pads (not shown) on the substrates 30, 40.

When the boards 30, 40 are fully inserted into the curved portions 12, 13 of the electrical connector 10, the latches 16, 17 are inserted into the holes 31, 41 of the boards 30, 40 as shown in FIG.
To fit. By this fitting, the electric connector 10 is positioned at a predetermined position on the boards 30, 40, and the contact portions 14, 1,
5 aligns with the conductive pads on the substrates 30, 40,
The electrical connector 10 is retained against the boards 30 and 40. The latches 16 and 17 are bent and formed inward of the curved portions 12 and 13. Therefore, the electrical connector 10
When a force in the direction of pulling out (to the right in FIG. 6) is applied, the locking of the boards 30 and 40 with the holes 31 and 41 becomes deep, so that the electrical connector 10 is unlikely to drop from the boards 30 and 40. The latches 16 and 17 may be in contact with the conductors formed on the inner walls of the holes 31 and 41 for electrical conduction.
You don't have to carry it.

When the electric connector 10 is detached from the boards 30 and 40, the curved portions 12 and 13 are expanded by a proper jig (not shown) to latch the latches 16 and 17 and the holes 31.
Disengage 41. The jig is used for the electrical connector 10
It may also be used when connecting the substrates 30 and 40.

As shown in FIG. 5, the contact portion 14 (15) of this embodiment extends from the end of the resin film 21 toward the inside of the curved portion 12 (13). For this reason, since the area from the curved portion 12 (13) not in contact with the substrates 30 and 40 to the contact point of the contact portion (14 (15) in contact with the conductive pad acts as an elastic region, the spring length is relatively long. The contact 22 is less likely to be plastically deformed,
If the same elasticity as before is required, the electrical connector 1
The length in the direction along the planes of the substrates 30 and 40 of 0 (horizontal direction in FIG. 5) can be reduced, and the occupied area on the substrate can be reduced. Further, since the resin film 21 covers the entire area of the contact 22 except the contact portions 14 and 15, an accidental short circuit is prevented.

The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited to the above-described embodiments, and various modifications and changes can be made as necessary. For example, the latches 16 and 17 may be wider than the other contacts 22. Widening the latches 16 and 17 increases the mounting strength of the electrical connector 10 to the boards 30 and 40. Further, from the viewpoint of the freedom of arrangement of the conductive pads on the board and the stability of attachment of the electrical connector to the board, it is desirable that two of the plurality of contacts at both ends are formed as latches, but they should be separated from each other. For example, any contact other than both ends may be used as the latch. Furthermore,
In the above-described embodiment, two curved portions that respectively receive the edge of the board are provided, but the curved portion is provided on one end side in the contact extension direction of the electric connector and is inserted into the through hole of the board on the other end side. It may be a tine part or an electric connector provided with three or more curved parts.

The electrical connector of the present invention can also be implemented in the following modes.

(1) In an electric connector having a plurality of elastic elongated contacts arranged parallel to each other with an insulating film at a predetermined interval and having at least one curved portion for receiving an edge of a substrate, The tip extends toward the inside of the curved portion, and at least two of the contacts, which are spaced apart from each other, are formed as latches that engage with holes formed in the substrate. . According to this electric connector, since the spring length of the contact can be relatively long, the contact is less likely to be plastically deformed, and the length of the electric connector in the direction along the surface of the board is reduced to reduce the occupied area on the board. It can be made smaller.

(2) In an electrical connector having a plurality of elastic elongated contacts arranged in parallel with each other with an insulating film at a predetermined interval and having at least one curved portion for receiving an edge of a substrate, home,
At least two spaced apart from each other are bent toward the inside of the curved portion, and are formed as latches that lock into holes formed in the board. According to this electrical connector, when a force is applied to the electrical connector in the direction of pulling it out of the substrate, the engagement with the hole of the substrate becomes deep and it is difficult for the electrical connector to fall off.

[0019]

According to the electrical connector of the present invention, of the contacts held at a predetermined interval by the insulating film,
At least two spaced apart are formed as latches that engage holes in the board so that the electrical connector and the connected board are positioned and the electrical connector is retained from the board. Therefore, without using the molded housing, there is an effect of eliminating the risk of short-circuiting between pads on the substrate due to the contact of the electrical connector and the risk of the electrical connector dropping off from the substrate.

[Brief description of drawings]

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

2 is a development view of the electrical connector of FIG. 1. FIG.

FIG. 3 is a perspective view showing the electric connector of FIG. 1 and a substrate to be connected.

FIG. 4 is a perspective view showing a connection state of the electric connector and the board of FIG.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI in FIG. 4;

FIG. 7 is a perspective view showing a conventional electric connector.

[Explanation of Codes] 10 Electrical Connector 12, 13 Curved Part 16, 17 Latch 21 Insulation Film 22 Contact 30, 40 Board 31, 41 Hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaki Uchida 1-1, Nikkocho, Fuchu-shi, Tokyo J Tower 16F Amp Technology Japan Co., Ltd.

Claims (1)

[Claims] 1. An electrical connector having a plurality of elastic elongated contacts arranged in parallel with each other with an insulating film at a predetermined interval, and having at least one curved portion for receiving an edge of a substrate. The electrical connector is characterized in that at least two of which are separated from each other are formed as latches that engage with holes formed in the substrate.