JPH02172166A - Structure for mounting connector on printed circuit board - Google Patents

Abstract

PURPOSE:To enhance the accuracy of connector installing position by furnishing an engagement means due to combination of a protrusion and recess provided on one inner side-face of an opening and the insertion part, and engaging them with each other using this means. CONSTITUTION:An insertion part 11 formed at the edge 10a of a printed circuit board 10 on which electronic parts are placed, is inserted from the opening side of a housing 3 of a surface-mounted type connector 1. At inserting the two side plates 3a, 3b of the connector 1 are fitted in notches 12, 12 partitioning the insertion part 11, that provides rough location. When insertion proceeds, a boss 7 on the inner wall of the housing 3 contacts the front end of the insertion part 11, which gets over the boss 7 under guidance of an inclined surface 7a formed thereon. At this time, the bottom plate 3b of the housing 3 is pressed downward for another connector 2, but because a groove 6 is provided in a block plate 3c, the bottom plate 3b deflects downward. A further insertion causes fit of the boss 7 in a hole 13 provided in the insertion part 11, and deflection of the bottom plate 3b is eliminated. Thus the housing 3 is located relative to the insertion part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mounting structure between a surface-mounted connector and a printed wiring board, in which an electrical connector is placed and arranged on the printed wiring board.

[Prior Art] Reflow soldering is used as a method for surface mounting electronic components on a printed wiring board (hereinafter referred to as a printed circuit board). This reflow soldering method involves applying cream solder to the wiring tabs on the printed circuit board, placing electronic components on the cream solder using an automatic mounting machine, and then blowing hot air to melt the solder. These electronic components are arranged and fixed on a printed circuit board.

According to the above-mentioned automatic mounting machine, it is necessary to hold the edge of the printed circuit board and place the electronic components etc. in a state where the printed circuit board is fixed. Therefore, when mounting a connector on the edge of the printed circuit board, it is necessary to attach the connector after automatic mounting of electronic components is completed. In other words, in order to place a connector on the edge of a printed circuit board, reflow soldering leaves the electronic components mounted before processing and attaches screws, pins, etc. to the printed circuit board that is not yet fixed to the board. Fix only the connector using
After that, reflow soldering was done.

[Problems to be Solved by the Invention] However, with the above-mentioned conventional connectors that are attached to printed circuit boards using screws, pins, etc., vibrations and shocks are generated in the printed circuit board itself when the connector is attached. A problem arises in that the placed electronic components move, making subsequent glue flow soldering impossible. Therefore, the attachment of the connector and the reflow soldering must often be carried out in a separate process after the electronic components have been reflow soldered, resulting in a problem that the number of manufacturing steps increases accordingly. In addition, since the connector is fixed to the printed circuit board with screws or pins, and then the contact connections are reflow soldered, the work becomes complicated, and the electronic components soldered in the previous process may be moved due to reheating. There was also the problem of deterioration.

Therefore, in order to solve the above-mentioned problems, the present invention has been devised so that the connector can be attached to the printed circuit board without generating vibration or shock during fixation, and can be easily attached to the printed circuit board without using screws or pins. The purpose is to provide a mounting structure for surface-mounted electrical connectors and printed wiring boards that can be fixed, improve the positional accuracy of connector mounting, and apply reflow soldering laws. .

[Means for Solving the Problems] The mounting structure between an electrical connector and a printed wiring board according to the present invention is a printed circuit board having a wiring pattern coated with cream solder on at least one side thereof and having an insertion portion at one end. a wiring board, a contact having a contact portion formed at one end that contacts a contact of a mating connector and a connecting portion connecting to a wiring pattern of the printed wiring board at the other end; and a connecting portion of the contact connected to the wiring pattern. a connector portion having an arrangement hole extending rearward so that the contact is disposed; and a connector portion formed integrally with the connector portion and in parallel with the connection portion; a surface-mounted electrical connector comprising: a housing portion having an opening into which an insertion portion of the printed wiring board is inserted; The present invention is characterized in that it includes an engaging means provided on a side surface and for engaging the insertion part and the opening with each other by a combination of the convex part and the concave part.

[Function] When the insertion part of the printed wiring board is inserted into the opening of the housing part of the electrical connector, the connection part of the contact is connected to the wiring pattern provided on one side of the printed wiring board, and furthermore, the connection part of the contact is connected to the wiring pattern provided on one side of the printed wiring board, and The electrical connectors are engaged with each other by engagement means formed by a combination of protrusions and depressions provided on the side surface and the insertion portion, thereby fixing the electrical connector to the printed wiring board.

[Embodiment] FIG. 1 is a cutaway perspective view showing an embodiment of a mounting structure for a surface-mounted electrical connector and a printed wiring board according to the present invention.

First, an insertion portion 11 for the connector 1 is formed on an edge 10a of the printed circuit board 10 to which the surface-mounted electrical connector 1 is attached. This insertion part 11 is formed by a pair of notches 12.12 formed in the printed circuit board 10 at intervals of the same width as the connector 1, and the insertion part 11 is provided with engaging means at predetermined intervals. A hole 13.13 is formed as one of the holes.

This connector 1 is integrally formed with a connector part 2 and a housing part 3 for attachment to the insertion part 11.

The connector section 2 is a connector for mounting a printed circuit board, which constitutes a plug-receptacle type connector. In this embodiment, a connector including female contacts will be described as an example.

In this connector portion 2, a large number of female contacts 4 are arranged at a predetermined pitch, passing through the connector section 2 in the horizontal direction from the front surface 2a to the rear surface 2b. This female contact 4 has a connecting piece 5 extending toward the rear surface 2b of the connector portion 2 and serving as a connecting portion. This connection piece 5 is formed in an inverted C-shape, and its bent portion 5a or tip thereof comes into contact with the wiring pattern 14 provided on the insertion portion 11 of the printed circuit board 10.

Next, the housing part 3 is located below the connector part 2, and is formed into a substantially box-like shape with the rear surface 2b side of the connector part 2 open. The upper plate of the housing part 3 also serves as the bottom plate of the connector part 2, and both side plates 3a, 3a and the bottom plate 3b are integrally molded with the connector part 2. These side plates 3a, 3a and bottom plate 3b are connected to the connector part 2.
It is formed so as to protrude toward the rear surface 2b. Moreover, the closing plate 3c forming the front surface of the housing part 3 is flush with the feeding surface 2a of the connector part 2.

A slit-shaped groove portion 6 is formed in the closing plate 3c along the longitudinal direction of the housing portion 3, and the bottom plate 3b of the housing portion 3 has a structure that is easily bent by receiving external force.

Further, on the upper surface of the bottom plate 3b, that is, on the inner wall surface of the housing portion 3, a plurality of protrusions 7 as retaining means corresponding to the holes 13 of the insertion portion 11 are provided. stiff protrusion 7
An inclined surface 7a is formed on the opening side of the rear end of the housing portion 3, which serves as an insertion opening for the insertion portion 11.

Next, a method for attaching the surface mount type connector 1 configured as described above to the printed circuit board 10 will be explained.

First, cream solder is applied on the pattern 14 of the printed circuit board 10 in advance. and.

Various electronic components are placed on this printed circuit board 10 at predetermined positions using cream solder by an automatic mounting machine.

Next, the electronic parts! ! The insertion portion 11 formed on the edge 10a of the placed printed circuit board 10 is inserted from the opening side of the housing portion 3 of the surface mount type connector 1, as shown in FIG. 2(a). When inserting, both side plates 3a, 3a of connector 1
are fitted into the notches 12, 12 that partition the insertion portion 11, and approximate positioning is performed. As the insertion progresses, the protrusion 7 on the inner wall surface of the housing part 3 comes into contact with the front end of the insertion part 11 as shown in FIG. 2(b), but using the slope 7a formed on the protrusion 7 as a guide, The insertion portion 11 climbs over the protrusion 7. At this time, the bottom plate 3b of the housing part 3 is pressed downward against the connector part 2, but a groove part 6 is provided in the closing plate 3c that connects the connector part 2 and the bottom plate 3b, so that the bottom plate 3b can be deformed to some extent. Therefore, the bottom plate 3b is bent downward as shown in FIG. 2(C). As the insertion progresses further, as shown in Figure 2(d),
As the protrusion 7 fits into the hole 13 of the insertion part 11, the bending of the bottom plate 3b is released and the housing part 3 recovers its original shape. Thereby, the housing part 3 is positioned and fixed with respect to the insertion part 11.

At this time, the connection piece 5 of the connector part 2 is attached to the printed circuit board l.
Attach the bent portion 5 to the pattern 14 on O through cream solder.
Contact at a. Further, since this insertion operation is performed by soft touch, no vibration or impact is generated on the printed circuit board 10.

Then, reflow soldering is performed on the printed circuit board 10 on which the electronic components are placed and the connector 1 is fixed, and both the electronic components and the connector 1 are soldered at the same time.

In this embodiment, an example has been described in which the connector portion is configured as a connector having female contacts, but it may also be configured as a male contact connector that pairs with the female contacts. Furthermore, although an example of a surface mount connector that is connected horizontally has been described, the same effect can be obtained even if the connector part 20 is bent vertically with respect to the printed circuit board 10, as shown in FIG. It will be done.

Further, in the surface mount type connector of this embodiment, an example has been described in which the connection piece is connected to one side of the printed circuit board, but it may also be formed so as to be connected to both sides of the printed circuit board 10 as shown in FIG. . In this case, connector parts 21 and 22 are formed above and below with the housing part 3 in between,
The connecting pieces 51 and 52 are formed to face each other.

Furthermore, in the above description, a configuration has been described in which when the printed circuit board is inserted into the opening of the housing part 3, the elasticity of the bottom plate 3b is used to position and fix the printed circuit board, but the present invention is limited to each of the above embodiments. First, as shown in FIG. 5, the protrusion 70 of the housing part 3 is installed in the recess 31 of the bottom plate 3b so as to be elastically moved in the vertical direction by a spring 71. 3b, and when the printed circuit board 10 is inserted, the protrusion 70 is elastically pressed downward by the tip of the printed circuit board 10, and when the printed circuit board 10 is further inserted, the protrusion 70 is inserted into the hole 13. 70 are fitted together by the bias of the spring 71, and the connector is firmly attached to the board 10.

Further, as shown in FIG. 6, the edge 1 of the printed circuit board 100
A printed circuit board in which the thickness of 00A is made thinner than other parts, a slit part 101 is provided below it, and a spring plate 102 made of an elastic material and having an inclined surface 102A formed in the front is further provided below it. 100.

According to this printed circuit board 100, the connector l having the protrusion 7 described in the above embodiment may be used. Furthermore, in this printed circuit board 100, the bottom plate of the connector 1 does not need to be elastic. With the printed circuit board 100 configured in this way, the spring plate 10 can be inserted into the opening of the housing part 3.
2 elastically rides on the protrusion 7 and then the protrusion 7 and the hole 1
3 are engaged, and the connector and printed circuit board are firmly fixed.

Furthermore, as shown in FIG.
31, and a projection 170 is provided in the recess 131 so as to be elastically moved in the vertical direction by a spring 171. In this case, the protrusion 170 typically
When the printed circuit board 100 is inserted into the opening of the housing part 3, the protrusion 170 is elastically pressed downward as in the embodiment described above. Thereafter, the connector is fitted into the hole 32 provided in the bottom 3b of the housing part 3, and is securely attached to the board 10.

[Effects of the Invention] As explained above, the mounting structure of the electrical connector and printed wiring board of the present invention allows the connector to be mounted and fixed on the printed wiring board without using other parts such as screws or bottles. The installation can be fixed softly with one touch, and it can be installed with high precision, improving the reliability of the installation.Furthermore, it can be installed without generating vibration or shock to the printed circuit board, so electronic components can be attached using adhesive flow soldering. The connector can be fixed to the printed circuit board before processing, reflow soldering can be performed at the same time as other electronic components, and the mounting process for surface mounting of the printed wiring board can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a cutaway perspective view showing an embodiment of the mounting structure for a surface-mounted electrical connector and a printed wiring board according to the present invention, and FIGS. 2(a) to (d) are printed circuit boards of the electrical connector according to the present invention. FIGS. 3, 4, 5, 6 and 7 are side sectional views showing other embodiments of the surface mount type connector according to the present invention. be. DESCRIPTION OF SYMBOLS 1... Electrical connector, 2... Connector part, 3... Housing part, 4... Contact, 5... Connection part (connection piece), 7... Engagement means (protrusion), 10 ---Printed wiring board, 11---insertion part, 13--engaging means (hole), 14-- wiring pattern.

Claims (1)

[Claims] A printed wiring board having a wiring pattern coated with cream solder on at least one side thereof and having an insertion portion at one end, and a contact portion for contacting a contact of a mating connector at one end. , a contact having a connecting portion connected to the wiring pattern of the printed wiring board at the other end; and an arrangement in which the contact is arranged so that the connecting portion of the contact extends rearward so as to be connected to the wiring pattern. A surface comprising a connector part having a hole, and a housing part formed integrally with the connector part and in parallel with the connecting part, and having an opening into which an insertion part of the printed wiring board is inserted. A mounting type electrical connector having a convex part and a concave part, and provided at an insertion part of the printed wiring board and an inner surface of an opening of the electrical connector, and the combination of the convex part and the concave part makes the insertion part and an engaging means for mutually engaging the opening and the electrical connector.