JPH04349374A - Surface-mounting electric connector - Google Patents

Abstract

PURPOSE:To facilitate press holding of a connector and its sure touch onto the respective conductive pads by providing a pair of press pieces openable to a fixing leg for fixing the connector temporarily to a penetration hole of a printed wiring board and a fixing member having a contraction leg. CONSTITUTION:A connector comprises an insulating housing 11 and plural number of conductive contacts arrayed in it. The housing 11 is provided with a fixing leg 17 for temprorarily fixing the connector to a printed wiring board 30. The fixing leg 17 has press pieces 17a, 17b mutually openable outward, and it is also provided with a metallic, fixing member 20 having a contraction leg 23 for insertion into the middle of a penetration hole 31 in the wiring board. The contraction leg 23 has a pair of working pieces 23a, 23b elastic mutually in pressing inward. When inserted into the penetration hole 31. The pieces thus get in between the press pieces 17a, 17b of the fixing leg 17, thereby forcefully opening the latter, so that the press pieces are press-fitted onto wall surfaces of the penetration hole 31 in the wiring board 30.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a surface-mount electrical connector, and more particularly, it is provided with mounting legs for temporarily fixing it to the surface of a printed wiring board when it is mounted on the surface of the printed wiring board. Regarding electrical connectors.

(Prior Art) Conventionally, in this type of connector, a mounting leg is generally provided integrally with an insulating housing.

These mounting legs are used to temporarily fix the connector to the printed wiring board by inserting it into the through hole of the printed wiring board when soldering the multiple contacts arranged on the connector to the conductive pads arranged on the surface of the printed wiring board. It is.

(Problems to be Solved by the Invention) However, in the conventional mounting legs, it was not expected that the holding force would be sufficient to press the connector against the printed wiring board surface. In other words, it only had the function of simply holding the connector on the wiring board.

Thus, for example, the contacts of a connector (e.g.
There was a problem in that the conductive pads (SMT type) did not come into contact with the conductive pads on the wiring board, or even if they did, it was not reliable.

Furthermore, in connectors that require high packaging density on printed wiring boards, the mounting legs are generally small and the holding force is correspondingly weak. If there is a difference in the height of each contact of such a connector with respect to the printed wiring board surface, the contact that most protrudes from the wiring board surface becomes the reference for contacting the wiring board, resulting in the same problem as described above.

It is an object of the present invention to provide a connector having mounting means that exerts a holding force that presses the connector against the surface of a printed wiring board, and further ensures that each contact contacts each conductive pad on the printed wiring board. It is in.

(Means for Solving the Problems) This invention to achieve the above object includes an insulating housing provided with mounting legs for inserting into a through hole of a printed wiring board and temporarily fixing a connector to the printed wiring board. It targets surface mount electrical connectors.

The mounting leg has a pair of press-contact parts that can be expanded outwardly from each other.

The connector further includes a metal fixing member having a constriction leg inserted into the center of the through hole.

The strangling leg has a pair of acting parts that have elasticity to expand when pressed inwardly, and both of the acting parts resist the elasticity to expand the central part of the through hole. When inserted into the hole, the acting parts forcibly insert between the two pressure contact parts so as to press the outer peripheral surfaces of the two pressure contact parts against the inner peripheral surface of the through hole, thereby expanding the two pressure contact parts to the outside. Let it open.

(Function) In the connector according to this invention having the above configuration,
The action parts of the pair of clamping legs of the fixing member are forcibly inserted between the press-contact parts of the pair of mounting legs and expand these press-contact parts outward, so that the press-contact parts are inserted into the through-holes of the printed wiring board. Pressurely engage the wall surface of the

(Example) An example of the connector according to the invention will be described below with reference to the drawings.

1 to 4, a connector 10 is composed of an insulating housing 11 made of synthetic resin and a plurality of conductive contacts 12 made of metal arranged on the insulating housing 11. The housing 11 is symmetrical at its longitudinal ends;
It is composed of a first member 11a and a second member 11b fitted thereto. The first member 11a has a flange 13 extending to both sides in the width direction at an end portion in the length direction, and another flange 14 extending in the length direction. Each contact 12 is basically L-shaped and has a contact portion 12a curved in an arc shape at one end and a leg portion 12B bent into an L shape at the other end, and is insert-molded in the first member 11a. It is attached as one piece. The arrangement pitch of each contact 12 corresponds to the arrangement pitch of a plurality of conductive pads (not shown) arranged on the surface of the printed wiring board 30. The flange 13 extends by at least the same length as the extension length of the leg portion 12b of each contact 12, and also has the function of protecting each contact 12 from damage due to collision with other objects. The flange 14 is provided with a slot 15 elongated in the width direction and a locking groove 16 at a position opposite to the slot 15.

Furthermore, as shown in FIGS. 3 to 6, the flange 14
Attachment legs 17 are integrally provided from the bottom surface of the unit and project vertically around the slots 15 . Mounting shaft 1
7 is formed into a fan-shaped cross section with both slopes 18a and 18b on the inside, and has a pair of press-contact parts 17a and 17b that have expansion elasticity against mutual inward pressure, and when not in use,
Their inner surface central portions 18c are in contact with each other. In this state, the shape connecting the outer circumferences of the press-contact parts 17a and 17b is substantially circular, and the center of this circle is located at the printed wiring board 30.
The diameter D1 of this circle coincides with the center of the through hole 31 of the printed wiring board 30 for inserting the mounting leg 17.
It is formed to have a dimension larger than the diameter D2 of.

The connector 10 includes a metal fixing member 20 shown in FIG. The fixing member 20 has a channel-shaped (groove-shaped or U-shaped) portion 21 and flanges 22 continuous to both ends of the channel-shaped portion.

Furthermore, the fixing member 20 has a tightening leg 23 that is connected to one side edge of the center of the channel type part 21 and hangs down for a relatively long time, and a downward locking part 27 that is connected to the opposite side edge of this tightening leg. are doing. The tightening leg 23 is divided near the lower end through a slit 24 at the center in the longitudinal direction, and has a pair of acting portions 23a and 23b that have expansion elasticity against mutual inward pressure. From the outside of the acting parts 23a and 23b, there is a convex edge 2.
5a and 25b protrude. The width W between both convex edges 25a and 25b is equal to the diameter D2 of the through hole 31 of the printed wiring board 30.
It is formed larger by a given dimension.

To surface-mount the connector 10 on the printed wiring board 30, the connector 10 is placed at a given position on the printed wiring board 30, and the mounting legs 17 are inserted into the through holes 31. Next, the channel-shaped portion 21 of the fixing member 20 is attached to the flange 1 of the connector 10.
4, and the tightening leg 23 is inserted into the through hole 31 through the slit 15.
When the locking portions 27 are inserted into the locking grooves 16, the action portions 23a and 23b are forcibly inserted between the pressure contact portions 17a and 17b, respectively. For this reason, the pressure contact portion 17a,
17b are mutually expanded and pressed into engagement with the wall surface of the through hole 31. On the other hand, in the tightening leg 23, the operating portions 23a and 23b are close to each other, and the convex edges 24a and 14b are pressed into engagement with the wall surface of the through hole 31 between the slopes 18a and 18b. therefore,
The connector 10 is strongly pressed against the surface of the printed wiring board 30 by the fixing member 20, and this state is reliably maintained.

In this holding state, each contact 12 is soldered to a corresponding conductive pad on the printed wiring board 30. When performing this soldering, it is necessary to accurately position each contact 12 with respect to each conductive pad, but since the central axes of the mounting leg 17 and the through hole 31 are aligned, accurate positioning is possible. It will be guaranteed.

As shown in FIGS. 8 and 9, the fixing member 20 fixes the outer peripheral edge of the flange 22 and the inner peripheral edge of the slot 26 onto the printed wiring board 30 by soldering 32. This makes the holding of the connector 10 to the printed wiring board 30 even stronger.

Note that a mating connector having a complementary relationship is fitted into the connector 10.

(Effects of the Invention) According to the connector according to the present invention having the above configuration and operation, sufficient holding force is exerted to press the connector against the printed wiring board. Therefore, for example, even if the connector or printed wiring board is warped,
Furthermore, even if there is a difference in the height of each contact of the contactor with respect to the printed wiring board, each contact of the connector can be reliably brought into contact with each corresponding conductive pad on the printed wiring board, and in that state, each The contacts and each conductive pad can be reliably soldered.

Furthermore, the alignment of the central axes of the mounting leg and the through hole of the printed wiring board into which the mounting leg is to be inserted is ensured by interposing both working portions of the tightening leg between the pressure contact portions of the mounting shaft. Therefore, the positioning of each contact and each corresponding contact is ensured.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one end of the connector according to the invention. FIG. 2 is a sectional view perpendicular to the length direction of the connector. FIG. 3 is a partial sectional view of the connector fixed to the printed wiring board by the mounting legs of the connector and the tightening legs of the fixing member. FIG. 4 is a bottom perspective view with the tightening leg inserted between the mounting legs. FIG. 5 and FIG. 6 are plan views showing the positional relationship between both pressure contact portions of the mounting leg and both action portions of the tightening leg. FIG. 7 is a perspective view of the fixing member. 10: Connector 11: Housing 12: Contact 17: Mounting legs 17a, 17b: Pressure contact part 20: Fixing member 23: Tightening legs 23a, 23b: Action part 30: Printed wiring board 31: Through hole Attorney Yoshiharu Shirahama

Claims (1)

[Scope of Claims] A surface mounting electrical connector in which an insulating housing is provided with mounting legs for inserting into a through hole in a printed wiring board and temporarily fixing the connector to the printed wiring board, wherein the mounting legs are attached to each other. The connector has at least one pair of pressure contact parts that can be expanded outwardly, and the connector further includes a metal fixing member having a tightening leg inserted into the center of the through hole, and The attached leg has at least one pair of acting parts that have expansion elasticity when pressed inwardly, and both of the acting parts resist the expansion elasticity and expand at the center of the through hole. When inserted into the press-contact part, the two acting parts forcibly insert between the two press-contact parts so as to press the outer surfaces of the two press-contact parts against the wall surfaces of the through-holes, and expand the two press-contact parts to the outside. A front connector featuring: