JPH067503B2 - Electrical connector for circuit board - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electric connector that is connected to a circuit of a circuit board by being inserted into a circuit board on which an electronic component is mounted.

[Conventional technology]

Conventionally, as an electrical connector of this kind, the actual open sho 60-00717
There was something like No. 8. In this conventional electric connector, a supporting piece (mounting leg) extends downward from the bottom surface of the insulating base (insulating housing), and a connecting terminal projects from the side portion to a position at the same level as the bottom surface. To attach this electric connector, insert the supporting piece into the insertion hole (mounting hole) of the circuit board so that the bottom surface of the insulating substrate is placed on the circuit surface of the circuit board, and use the hook portion at the tip of the supporting piece. It will be retained. Thus, the connection terminal is elastically contacted with the circuit from above and is electrically connected. In such an electrical connector, since it is possible to solder with the circuit of the connection terminal on the same side as the circuit surface of the circuit board, it is possible to easily connect the connector to the circuit surface side without using a double-sided board or the like. There is.

[Problems to be Solved by the Invention]

However, the conventional electrical connector for circuit boards as described above has the following problems.

Since the support piece projecting from the insulating substrate extends in the thickness direction of the circuit board, the extension length thereof is short, and sufficient elastic deformation cannot be achieved when the support piece is inserted into the insertion hole of the circuit board. Therefore, there is a possibility that the insertion will be unreasonable and the support piece and the circuit board may be damaged.

Once the support piece is inserted and attached to the circuit board, the electrical connector cannot be removed from the circuit board unless the support piece is destroyed. Therefore, it is very inconvenient because the electric connector cannot be freely attached / detached to / from the circuit board.

When the support piece is inserted into the insertion hole of the circuit board, the insertion becomes unreasonable, causing vibration or shock to the circuit board. Therefore, so-called reflow soldering becomes impossible, in which cream solder is applied to the wiring pattern on the circuit board, electronic components are placed on this cream solder, and then hot air is blown to melt and fix the solder. There is.

It is an object of the present invention to solve the above problems and provide an electric connector for a circuit board that can be attached / detached to / from the circuit board without any vibration or shock.

[Means for Solving the Problems]

According to the present invention, the above object is to provide a circuit board in which an insertion portion formed between two slit groove-shaped notches of the circuit board is inserted and fixed by a locking means provided on the circuit board. An electric connector for use with an insulating housing, and a plurality of contact terminals, wherein the insulating housing has a terminal arrangement portion for arranging the plurality of contact terminals, and a receiving portion for receiving the insertion portion of the circuit board. In the contact terminal, the connection portion elastically connected to the circuit portion of the circuit board projects rearward from the terminal arrangement portion in the circuit board direction, and the receiving portion has a side plate extending rearward on both sides thereof. Part and a bottom plate part for guiding and supporting when the circuit board is inserted, are communicated with an opening part which is formed so as to open rearward and upward, and the circuit part of the circuit board on the bottom plate part The contact portion of the contact terminal can be elastically contacted The side plate part is provided with an elastic locking part that extends rearward toward the insertion part of the circuit board to the rear end position of the bottom plate part, and the free end of the elastic locking part has the above-mentioned circuit board. This is achieved by the fact that a locking portion for locking and fixing the locking means is formed.

[Action]

Such an electrical connector is connected to the circuit board by inserting a predetermined insertion portion of the circuit board into the insulating housing and the receiving portion. In other words, the contact terminals of the insertion of the insertion part into the receiving part under the guidance of the bottom plate part come into contact with the wiring pattern of the circuit board, and when the predetermined position is reached, the locking part of the elastic locking part causes the circuit board to move. The electric connector is prevented from coming off by interlocking with the engaging means.

Further, since the elastic locking portion is long and has sufficient elasticity, the electrical connector is detached by releasing the locking by utilizing the elasticity.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a cutaway perspective view as a first embodiment of the present invention.

The connector 1 comprises an insulating housing 10 and contact terminals 20.

The insulating housing 10 is integrally molded of an insulating material such as plastic, and the upper half of the upper part (the left part in the figure)
Is provided with a terminal arrangement portion 11 having a large number of terminal holes 12 for arranging the contact terminals 20, and the insertion portion 32 of a circuit board described later is received under the terminal arrangement portion. Receiving department
13 are formed.

The insulating housing 10 is formed in a substantially box shape having a large opening on the rear surface 11a side of the terminal arrangement portion 11 and having openings 14 open rearward and upward. The opening portion 14 is in communication with the receiving portion 13,
Then, on both sides thereof, the side plate portions 15, 15 extending rearward are provided.
And a bottom plate portion 16 on the bottom surface thereof. The side plate portions 15 and 15 are formed with elastic locking portions 17 by two slits 17b extending to the vicinity of the front end surface 11b. Inside the rear end of the elastic locking portion 17, a locking projection 17a having a taper is formed.
Is provided.

The contact terminal 20 is formed of a springy metal sheet material, and a front end thereof is provided with a contact portion for receiving and contacting a contact terminal (not shown) of a mating connector in the terminal hole 12. The rear end thereof is provided with a connecting portion that projects rearward from the back surface 11a and is bent into a dogleg shape to elastically connect to the conductive pattern 33 that is the circuit portion of the circuit board.

On the other hand, the circuit board 30 has a plurality of slit groove notches 31 at the front end thereof, and an insertion portion 32 is formed between two adjacent notches 31. In the back of the notch 31,
A stepped locking recess 31a for locking the locking projection 17a of the elastic locking portion 17 is provided. Note that 33 is a conductive pattern.

Next, a method of attaching the circuit board electrical connector configured as described above to the circuit board will be described.

First, cream solder is applied to the conductive pattern 33 of the circuit board 30. Then, various electronic components are mounted on the circuit board 30 at predetermined positions via cream solder by an automatic mounting machine.

Next, the insertion portion 32 of the substrate 30 on which the electronic parts are placed is inserted from the opening side of the receiving portion 13 of the connector 1 by an automatic machine such as a robot, and the portion to which the contact terminal 20 is connected is the bottom plate portion. Supported by 16. At this time, the elastic locking portion 17 of the connector 1 is fitted into the notch 31 that defines the insertion portion 32, and the approximate positioning is performed. Then, when the insertion is further advanced, the locking protrusion 17a of the elastic locking portion 17 becomes the locking recess 3 of the notch 31.
Positioned and fixed by engaging with 1a by soft touch. At this time, the connection portion of the contact terminal 20 of the connector 1 contacts the pattern 33 of the substrate 30 via the cream solder. Then, a plurality of such connectors 1 are repeatedly inserted into the receiving part by an automatic machine at other parts, and finally, reflow is performed on the substrate 30 on which the electronic parts are mounted and the plurality of connectors 1 are fixed as described above. A soldering process is performed to solder both the electronic component and the connector 1 at the same time.

In the above embodiments, the connection part of the contact terminal is in contact with the wiring pattern via cream solder, but the present invention is not limited to this, and the connection part is a lead wire of an electronic component. It may be of a type that is directly connected to a connection terminal or the like.

〔The invention's effect〕

The circuit board electrical connector of the present invention has the following effects.

Since the elastic locking portion of the connector is formed to be long in the inserting direction, its elasticity is sufficiently secured, and the elastic locking portion or the circuit board may be damaged because it is inserted into the circuit board by soft touch and fixed. Absent.

Further, since the soft touch is inserted as described above, vibration and impact are not generated in the circuit board, and there is no inconvenience that the electric component moves before the reflow soldering.

Even after being fixed to the circuit board, the elastic locking portion can be easily removed by soft touch with a finger or a tool. Therefore, even if it is necessary to remove the electrical connector before reflow soldering, the circuit board does not generate vibration or impact, and the electronic component can be replaced without moving before reflow soldering, It will be even more convenient.

Since the circuit board is supported by the bottom plate at the portion where the circuit section should be connected to the contact terminals, it is stable during solder connection, reliable soldering is possible, and the upper side of the bottom board is open. And soldering is easy.

[Brief description of drawings]

 FIG. 1 is a cutaway perspective view of the first embodiment of the present invention. 1 ……………… Electrical connector 10 ……………… Insulation housing 11 ……………… Terminal placement part 13 ……………… Reception part 14 ……………… Opening part 15 …… ………… Side plate 16 ……………… Bottom plate 17 ……………… Elastic locking part 17a ……………… Locking part 20 ……………… Contact terminal 30 ……………… … Circuit board 32 ……………… Insert part

Claims (1)

[Claims] 1. An electric connector for a circuit board, wherein an insertion portion formed by two slit groove-shaped notches of the circuit board is inserted and fixed by a locking means provided on the circuit board. The insulating housing has an insulating housing and a plurality of contact terminals, and the insulating housing is composed of a terminal arrangement portion for arranging the plurality of contact terminals and a receiving portion for receiving the insertion portion of the circuit board. The contact terminal has a connecting portion that is elastically connected to the circuit portion of the circuit board and protrudes rearward from the terminal arrangement portion in a direction toward the circuit board, and the receiving portion has a side plate portion that extends rearward on both sides of the contact portion and the circuit board. The bottom plate portion for guiding and supporting the case is communicated with the opening formed so as to be open rearward and upward, and the connecting portion of the contact terminal is elastically connected to the circuit portion of the circuit board on the bottom plate portion. It is possible to contact, and the side plate part, An elastic locking portion is provided which extends rearward toward the insertion portion of the road board to the rear end position of the bottom plate portion, and the free end of the elastic locking portion is locked to the locking means of the circuit board. An electrical connector for a circuit board is characterized in that a locking portion for fixing is formed.