JPH10335025A - Card edge connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain the visual check of soldered parts of a lower end of a female terminal to the surface and the back of a board by forming a lower part of an outer wall of a connector housing with a notch, through which a lower end of a folded part of a female terminal inserted into a through hole of the board can be seen. SOLUTION: A lower part of an outer wall of each cavity 15c side of a housing 15a of a card edge connector 15 is formed with a notch 15h, through which each lower end 11d of a folded part 11c of female terminals 11A, 11B inserted into a through hole 3c of a board 3 can be seen from outside of a surface 3a of the board 3. Since an upper folded part 11c of a press-in part 11e of the female terminals 11A, 11B is formed into a straight part 11, which is offset to one side of the upper end 11f of the press-in part 11e, the other side of the upper end 11f of the press-in part 11e can be vertically pushed from over by a press-in jig 6, which is inserted into a cavity 15c of the housing 15 from an upper opening 15i, and the press-in work is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card edge connector capable of visually inspecting soldered portions on the front and back sides of a substrate at the lower end of a female terminal.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 6A to 6C, a male terminal 2 formed at a terminal of a printed wiring of a printed circuit board 7 is inserted into a female terminal 1 so that both terminals 1 and 2 are connected. Electrical connection is proposed (Japanese Patent Publication No. 62-9988).
Reference).

When the male terminal 2 is inserted into the female terminal 1, a fixed contact portion 1a with which one surface 2a of the male terminal 2 comes into contact.
And a spring contact portion 1b, which is pushed open against the spring force so that the other surface 2b of the male terminal 2 comes into contact, is formed in a U-shape.

In order to rationally incorporate the above female terminal 1 into a connector, the present applicant has filed Japanese Patent Application No. 8-34212.
No. 3 proposes the following card edge connector.

This card edge connector is shown in FIG.
(C), a connector 5 fixed to the surface 3a of the substrate 3 by screws 4 is composed of an inner housing 5b and an outer housing 5c, and the inner housing 5b is fitted into the outer housing 5c, and The lock claws 5d of 5c are locked in the lock holes 5e of the outer housing 5c, and the two housings 5b and 5c are assembled integrally.

In the inner housing 5b, a cavity 5f for accommodating the fixed contact portion 1a and the spring contact portion 1b of the female terminal 1 and a folded portion 1f folded in an inverted U-shape from the fixed contact portion 1a are accommodated. A cavity 5h is formed, and a press-fit portion 1g at an intermediate portion of the folded portion 1f of the female terminal 1 is press-fitted into a press-fit slit 5g of the cavity 5h.

Further, a lower end 1h of the folded portion 1f is inserted into a through hole 3c of the substrate 3 and fixed to a printed wiring or the like on the back surface 3b of the substrate 3 by soldering a.

[0008]

However, although the soldering a on the back surface 3b of the substrate 3 at the lower end 1h of the female terminal 1 can be visually confirmed, the soldering is performed on the front surface 3a of the substrate 3 through the through hole 3c by capillary action. There was a problem that it was not possible to visually inspect whether or not it was attached.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a card edge connector capable of visually inspecting a soldered portion of a lower end of a female terminal on a front side and a back side of a substrate. It is the purpose.

[0010]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a U-shaped fixed contact portion and a spring contact portion into which a male terminal formed on a terminal of a printed circuit board can be inserted. A female terminal formed with a folded portion folded in an inverted U-shape from the contact portion is press-fitted into the cavity of the connector housing in parallel from the insertion direction of the male terminal at a constant pitch, and the lower end of the folded portion is In a card edge connector which is inserted into a through hole of a board to which a connector housing is fixed, a notch is provided at a lower portion of an outer wall of the connector housing so that a lower end of a folded portion of the female terminal inserted into the through hole of the board can be visually observed. A card edge connector characterized by being formed is provided.

According to the present invention, since the lower end of the female terminal inserted into the through hole of the board can be visually observed from the notch formed in the lower portion of the outer wall of the connector housing, the soldering of the surface of the board can be easily inspected.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. Note that the same components and operations as those of the prior art are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 5, the card edge connector 15 has a large number of female terminals 11A, 11B,... In a housing 15a fixed to the board 3 by screws (see FIG. 7).
(See FIG. 1), and the female terminals 11A, 11B
Each of the male terminals 2,... Formed on the terminals of the printed wiring of the printed circuit board 7 is inserted into each of the terminals 11A, 11B.
And 2 are electrically connected.

The punched female terminal 11A shown in FIG.
When the male terminal 2 is inserted, the punched female terminal 11B shown in FIG.
a and the other surface 2b of the male terminal 2
A spring contact portion 11b which is pushed open against the spring force so as to come into contact with each other is formed in a U-shape.
Folded portion 11c folded in an inverted U shape from the top of 1b
Are formed.

The lower end 11d of the folded portion 11c is inserted into the through hole 3c of the substrate 3, and is located at a middle position in the vertical direction of the folded portion 11c. A press-fit portion 11e is formed.

The folded portion 11 above the press-fitting portion 11e
A straight portion 11g offset from one side (the fixed contact portion 11a side in FIG. 1) of the upper end 11f of the press-fitting portion 11e is formed in c, and inserted into the cavity 15c of the housing 15a from the insertion direction of the male terminal 2. Press-fitting part 11e with press-fitting jig 6
The other side of the upper end 11f (in FIG. 1, the side opposite to the fixed contact portion 11a)
Can be pressed straight.

The turn-back portion 11 below the press-fit portion 11e
The curved portion 11h absorbs a thermal load from the lower end 11d to be soldered to the substrate 3 and a stress acting on the lower end 11d.
Are formed.

A projecting portion 11i projecting downward is formed below the fixed contact portion 11a.

The difference between the female terminal 11A of FIG. 1A and the female terminal 11B of FIG.
1a is short, the spring contact portion 11b is in the upper position, the fixed contact portion 11a of the female terminal 11B is long and the spring contact portion 11b is in the lower position, and the lower end 11d of the female terminal 11A is on the fixed contact portion 11a side. That is, the lower end 11d of the female terminal 11B is on the side opposite to the fixed contact portion 11a.

The housing 15a is not divided into an inner part and an outer part as in the prior art shown in FIG.
From i, a cavity 15b for accommodating the fixed contact portion 11a and the spring contact portion 11b of the female terminal 11 (A, B) and a cavity 15c for accommodating the folded portion 11c are formed.

At the bottom of the cavity 15b, there is formed an insertion hole 15d for inserting the protruding portion 11i of the fixed contact portion 11a, and a press-fitting portion 11e of the female terminal 11 is provided at an intermediate position in the vertical direction of the cavity 15c. A press-fitting slit 15e for press-fitting is formed.

The cavity 15b for accommodating the fixed contact portion 11a and the spring contact portion 11b of the female terminal 11A is formed by making the bottom 15j shallow by the short length of the fixed contact portion 11a.
Fixed contact portion 11a and spring contact portion 11 of the female terminal 11B
and the cavity 15c for accommodating the fixed contact portion 11a
Deepens the bottom 15j by a long time. The through hole 3c of the board 3 is formed on the fixed contact portion 11a side as shown in FIG. 1A because the lower end 11d of the female terminal 11A is on the fixed contact portion 11a side, and the lower end 1d is formed on the female terminal 11B.
Since 1d is on the side opposite to the fixed contact portion 11a, as shown in FIG. 1B, the curved portion 11h is formed on the side opposite to the fixed contact portion 11a with the direction of the curved portion 11h reversed.

As shown in FIGS. 2A and 2B, the housing 15a of the card edge connector 15 has cavities 15b and 15c for female terminals 11A and female terminals 11B.
Cavities 15b and 15c are formed alternately, and the lower end 11d of each of the two types of female terminals 11A and 11B is formed on the substrate 3 as shown in the back surface 3b in FIG.
The through-hole 3c into which the 11d is inserted has the female terminals 11A,
11B are formed in a staggered manner with their positions shifted in the width direction.

.. Correspond to the screw holes 15f on the lower surface of the connector housing 15a shown in FIG.
Screw hole for fixing with screw 4 from back surface 3b of
Reference numerals e and 3e denote positioning holes for inserting positioning pins 15g on the lower surface of the connector housing 15a from the front surface 3a of the board 3.

The lower part of the outer wall on the side of each cavity 15c of the housing 15a of the card edge connector 15 is shown in FIG.
As shown in FIG. 4, the lower ends 11d of the folded portions 11c of the female terminals 11A and 11B inserted into the through holes 3c of the substrate 3 are visible (see arrow S) from the outside on the surface 3a side of the substrate 3. A notch 15h is formed.

As described above, the female terminals 11A, 11B
The folded part 11c above the press-fitting part 11e is
Straight portion 11 offset to one side of upper end 11f of 1e
g, the other side of the upper end 11f of the press-fitting portion 11e can be pressed straight from above by the press-fitting jig 6 inserted into the cavity 15c of the housing 15a from the upper opening 15i. I can do it.

Further, since the press-fit portion 11e can be pressed straight from above, the female terminals 11A and 11B are less likely to be deformed at the time of press-fit, and the contact reliability with the male terminal 2 can be maintained.

Further, the notch 15h formed at the lower part of the outer wall of the housing 15a is inserted into the through hole 3
c of female terminals 11A and 11B inserted in c
Since the lower end 11d of the substrate 3c can be visually observed, when the lower end 11d is fixed to the printed wiring or the like on the back surface 3b of the substrate 3 by soldering a, the solder passes through the gap of the through hole 3c by the capillary phenomenon and the surface of the substrate 3 Also at 3a, it can be confirmed by visual inspection whether it is fixed by soldering b. Also,
The notch 15h can be used to spray a moisture-proof coating agent onto the soldering b and the like.

Further, the projecting portion 11i below the fixed contact portion 11a of the female terminals 11A and 11B is connected to the female terminal 11A.
At the time of press-fitting of A and 11B, the insertion hole 15 of the cavity 15c is formed.
d, when the male terminal 2 of the printed wiring of the printed circuit board 7 is removed from the female terminals 11A and 11B, the fixed contact portion 11a tends to rotate in the direction of the spring contact portion 11b (see arrow T in FIG. 1). ), The projection 1 inside the insertion hole 15d.
1i is abutted and blocked, so that each female terminal 11
The deformation of A and 11B can be prevented.

The fixed contact portion 11a and the spring contact portion 11b of the female terminals 11A and 11B are connected to the adjacent female terminals 1A and 11B.
Since the upper and lower positions of 1A and 11B are shifted from each other and press-fit into the cavities 15b and 15c of the housing 15a in an uneven shape, when inserting the male terminal 2 of the printed wiring of the printed circuit board 7, first, the female terminal 11A in the upper position After insertion into the female terminal 11B at the lower position, the insertion force is dispersed in two stages, and the insertion operation can be performed with a light force.

Further, the lower ends 11d of the folded portions 11c of the female terminals 11A and 11B are connected to the adjacent female terminals 11d.
A and 11B are inserted in the through holes 3c of the substrate 3 in a staggered manner with their positions shifted in the width direction.
Since 1d is not in one line but in two lines in a staggered manner, the interval between the adjacent soldered portions a can be increased, and the female terminals 11A,
11B can be further narrowed.

[0032]

As is clear from the above description, in the card edge connector of the present invention, the lower end of the female terminal inserted into the through hole of the board can be visually observed from the notch of the connector housing. In addition to the soldering of the back surface, the soldering of the front surface of the substrate can be visually inspected.

Further, the notch can be used to spray the moisture-proof coating agent accurately on the soldering of the surface of the substrate or the like.

[Brief description of the drawings]

FIG. 1 is a card edge connector of the present invention,
FIG. 2A is an enlarged cross-sectional view taken along the line PP of FIG.
FIG. 3 is an enlarged sectional view taken along line QQ of FIG.

FIG. 2A is a plan view of a card edge connector,
(B) is an RR line cross-sectional view of (A).

FIG. 3A is a rear view of the board, and FIG. 3B is a bottom view of the card edge connector.

FIG. 4 is a perspective view of a card edge connector.

FIG. 5 is a perspective view of a card edge connector and a printed circuit board.

6A and 6B are female terminals of a conventional card edge connector, wherein FIG. 6A is a side view before inserting a male terminal, FIG. 6B is a side view immediately after insertion, and FIG. 6C is a side view when insertion is completed. .

FIG. 7 is a prior art card edge connector;
(A) is a side cross-sectional view before inserting the male terminal, (B) is a side cross-sectional view immediately after insertion, and (C) is a side cross-sectional view when insertion is completed.

[Explanation of symbols]

 2 Male terminal 3 Board 3c Through hole 6 Jig 7 Printed circuit board 11A, 11B Female terminal 11a Fixed contact portion 11b Spring contact portion 11c Folded portion 11d Lower end 11e Press-fit portion 11f Upper end 11g Linear portion 11i Projection portion 15 Card edge connector 15a Housing 15b , 15c Cavity 15d Insertion hole 15e Press-fit slit 15h Notch

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Junichi Ono 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi Harness Research Institute, Ltd.

Claims (1)

[Claims] A U-shaped fixed contact portion and a spring contact portion into which a male terminal formed on a terminal of a printed circuit board can be inserted, and a folded portion folded from the fixed contact portion in an inverted U-shape. A female terminal formed by inserting the female terminal into the cavity of the connector housing in parallel at a constant pitch from the insertion direction of the male terminal, and inserting the lower end of the folded portion into a through hole of a board to which the connector housing is fixed. In the edge connector, a notch is formed at a lower portion of an outer wall of the connector housing so that a lower end of a folded portion of the female terminal inserted into the through hole of the board can be visually observed.