JPH0211749Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The present invention is used in the technical field of electrical connectors, particularly for electrical connectors for circuit boards.
The present invention relates to an electrical connector for a circuit board that has coupling openings in two directions for receiving contacts of a mating connector, and allows the contacts of the mating connector to be inserted and connected from either direction.

(Conventional technology and problems) When attaching an electrical connector to a circuit board, there are cases where it is necessary to miniaturize the device, or to change the direction of connection with the mating connector depending on the usage pattern of the device even if the connector arrangement is the same. . An example of a conventional electrical connector for circuit boards that meets such requirements is disclosed in Japanese Utility Model Application Publication No. 54-60285. This known connector has a rectangular housing with a straight through hole for inserting and holding the female contact, and the female contact is located in the through hole and has a shape that allows male contacts to be received from both ends of the contact part. Further, a leg-shaped connection portion extends from one end of the contact portion. The connection portion is connected to the through hole on the end face of the housing, is bent into a groove provided in a direction perpendicular to the through hole, and then protrudes perpendicularly from the groove bent at right angles again in the groove so that it can be connected to the circuit board. It is becoming.

However, in the above connector, the groove for accommodating the bent wire connection portion is formed in the thickness direction of the housing, and the distance thereof is short.

In addition, since the connecting portion is bent again in the middle of this groove, the portion held within the groove is extremely short. Consequently, when the above-mentioned connection part is inserted into the through-hole of the circuit board and immersed in flux liquid for soldering on the back side of the circuit board, the flux liquid rises from the through-hole of the circuit board and reaches the female part. It easily travels through the connection portion of the contact and reaches the contact portion with the male contact. Therefore, due to the increased thickness of the contact portion, not only is it not possible to obtain a predetermined fitting force when a male contact is inserted, but the surface treatment of the contact surface is covered, both of which cause poor contact. Furthermore, during the flow of high-temperature solder, the flux liquid that adheres to the terminal area and the bottom surface of the circuit board becomes gaseous, and the gas enters the terminal housing groove through the through-hole of the circuit board, and further houses the female contact. The flux reaches the inside of the through hole and directly contacts the contact portion of the female contact, and when the gas cools down, the flux itself adheres to the contact. This also makes the connection with the male contacts of the mating connector even more unstable, resulting in poor continuity.

(Means for Solving the Problems) The present invention solves the problems of the above-mentioned conventional electrical connectors, increases the holding force of the connection portion of the female contact, and lengthens the connection portion. The primary objective is to provide an electrical connector for a circuit board that prevents flux from reaching the contact area with the male contact during soldering with the circuit board, thereby preventing poor contact. It is something.

A second object of the present invention is to enable the male contact to be guided into the contact portion without damaging the surrounding area when inserted into the contact portion.

In order to achieve the above first object, the present invention comprises a housing and a plurality of female contacts disposed in the housing, the housing having an L-shaped block shape, with one side being a main body and the other side being a body part. A plurality of contact holding holes extending toward the post portion and into which the female contacts are inserted are provided in the main body portion and the post portion, respectively, so that the male contacts can be inserted through the openings on both sides. In addition,
Each contact holding hole is formed with an opening groove that extends with and communicates with the contact holding hole on the post-side surface of the main body portion, and the post portion is formed with a connection opening groove that communicates with the opening groove; The female contact has a contact portion held in the contact holding hole of the main body portion, and a connection portion connected to the contact portion and bent to be positioned in the connection opening groove of the post portion, The tip of the part protrudes from the post part so as to be able to contact the circuit board.

According to the present invention, the wire connection opening groove formed in the post portion of the housing can be made sufficiently long, and therefore the wire connection portion of the female contact guided and held here can also be made sufficiently long, making it easy to solder. The increase in flux at the time of contact is stopped at this portion and does not reach the contact portion. Furthermore, the holding force is increased and it is held firmly.

In addition, if you want to change the direction of the connection part, a connection holding hole is provided at the bottom of the connection opening groove of the post part, and the connection part of the female contact is located at a position corresponding to the connection holding hole. It is bent and inserted and held here, with the tip protruding.

That being said, changing direction is easy.

Furthermore, in order to achieve the second object of the present invention, the contact portion of the female connector includes a contact tongue portion located in the middle of the contact portion and having throat-like elasticity, and a contact tongue portion that is located in the middle of the contact portion and has throat-like elasticity, and The tongue may be provided with a contact tongue protection portion for guiding the male terminal.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.

1 and 2 show a first embodiment of the present invention. The connector 3 of this embodiment is composed of a housing 30 made of an insulating material and a female contact 40 made of a metal sheet material having spring properties and housed in the housing 30. has a substantially L-shaped block shape (an inverted L-shape in the illustrated arrangement), with one side serving as a main body portion 31 and the other side serving as a post portion 36.

The main body part 31 has a plurality of contact holding holes 3.
2 is formed with an opening groove 33 below it, and the width of the opening groove is smaller than the width of the contact holding hole 32.
A guide hole 34 having a tapered portion 35 is provided at the rear (in the upper right direction in the figure) for guiding insertion of the male contact 2 of the mating connector. Also,
The post part 36 is formed with a connection opening groove 37 and a connection part holding hole 38 for respectively receiving a first connection part 47 and a second connection part 48 which are formed by sequentially bending the connection part of the female contact 40 at right angles. . This wire connection opening groove 37 is communicated with the opening groove 33 . Further, the post portion 36 has a concave groove 3 at the rear of the post portion, that is, at a position opposite to the wire connection opening groove 37.
9 is provided.

As clearly shown in FIGS. 2A and 2B, the female contact 40 has a contact portion 41 at its front portion and a connection portion 46 at its rear portion.

The front end of the contact portion 41 is a contact tongue portion protection portion 42 having a substantially U-shaped cross section.The front portion of this protection portion 42 has a tapered portion for easily receiving the male contact 2 of the mating connector and for acting as a guide. 42'
is provided. Reference number 42'' is a convex portion for easily forming the tapered portion, and the convex portion 42'' also increases the strength of the protective portion 42. A substrate 43 is provided that extends rearward from the contact tongue protection portion 42 to a base 44 of the contact portion 41, and the base 44 also has a substantially U-shaped cross section. The base 4 is located in front of the base 44.
A pair of contact tongues 45, 45 are provided continuously from the throat 4, and the contact tongues 45, 45 have the throat 4 at the tip thereof.
It is bent inward in a dogleg shape so that it has a length of 5'. Furthermore, protrusions 44', 44' are provided on the open sides of the bases 44, 44 to prevent the male contacts 40 from coming off when inserted into the contact holding holes 32 of the housing 30.
In FIG. 2, the connecting portion 46 is bent at a substantially right angle from a bent portion 47' near the base 44 and extended laterally to form a first connecting portion 47, and further forms a bent portion 47'' in the middle thereof. It has a second connection part 48 that is bent rearward at a substantially right angle and directed downward.

The procedure for assembling the housing 30 configured in this way and the female contact is as follows.

The base portion 44 of the female contact 40 is inserted into the contact holding hole 32 of the housing 30 which is open to the front.
Insert the rear end of. At that time, female contact 40
The connecting portion 46 is inserted in alignment with the opening groove 33 provided below the contact holding hole 32.

Then, the connecting portion 46 connects to the first connecting portion 47.
is inserted into the wire connection opening groove 37 provided in the post portion 36 of the housing 30, and the second wire connection portion 48 of the wire connection portion 46 has its tip inserted into the wire connection holding hole 38 provided continuously with the wire connection opening groove 37. The first wire connection portion 47 comes into close contact with the bottom wall of the wire connection opening groove 37, and the rear end of the base portion 44 also comes into contact with the inner wall 32' of the contact holding hole 32. At this time, the protrusions 44', 44' of the base 44 are
The contact 40 is press-fitted and locked onto the upper inner wall of the contact holding hole 32, thereby preventing the contact 40 from coming off.

The circuit board 20 is attached to the rear end surface of the connector 3 assembled in this way. At this time, the second connection portion 48 protruding from the rear end surface is inserted into the through hole 21 provided in the circuit board 20 and then soldered and fixed. Also, a hole 22 for inserting and receiving a male contact of a mating connector.
is also provided on the circuit board. When the connector 3 is attached to the board 20 in this way, the male contact can be inserted and connected to the mating connector from the front or rear.
When a sufficient space for connector coupling cannot be secured on one side of the connector 3 or when coupling is made from the other side for other reasons, insertion and removal can be performed from the other side.

FIG. 3 shows a second embodiment of the present invention. The post portion 36A of the housing 30A of this embodiment is provided with a connection opening groove 37A extending to the lower end surface for receiving the connection portion 46A of the female contact 40A, and the left and right side wall surfaces of the opening groove 37A are provided with: A locking protrusion 37A' inclined from the front toward the rear is formed for locking and fixing the wire connection portion 46A. Furthermore, from the bottom of the connection opening groove, there is a concave groove 3.
A plurality of wire connection holding holes 3 are provided between the bottoms of 9A.
8A is provided. In addition, female contact 40
The connection part 46A of A is as shown in FIG.
The post portion 36A may be bent at right angles near the base and extended downward in a straight line.
The wiring part 46A may be bent so as to be inserted into the wiring part holding hole 38A provided in the circuit board, or the wiring part 46A may be bent forward and inserted into the through hole of the circuit board.
It can also be inserted and connected to the conductive circuit on the circuit board. In this way, according to this embodiment, it is possible to appropriately select the direction of the wire connection portion, and in addition, the holding force of the wire connection portion is further improved.

(Effects of the invention) As described above, the present invention allows the leg-shaped connection portion of the female contact to be made extremely long without impairing its holding force, so that the end of the connection portion can be inserted into the through hole of the circuit board after the end of the connection. Even if it is soldered, the flux will not reach the contact portion of the female contact, and problems of poor contact and instability when the male contact is inserted and connected are avoided. In addition, if a wire connection holding hole is provided in the post section of the housing, the direction of the wire connection section can be changed and the holding force can be improved.Furthermore, if the wire connection holding holes are provided in multiple locations, the position for taking out the wire connection section can be selected. This also improves convenience during use.

In addition, if a contact tongue protection part is provided on the contact part of the female contact, the contact part will not be damaged even if the male contact is inserted several times while changing the insertion, thereby contributing to the prevention of failure.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional perspective view of an electrical connector for a circuit board according to the first embodiment of the present invention, Fig. 2 shows a female contact used in the electrical connector of Fig. 1, and Fig. 2A is a front view; B is a side view, and FIG. 3 is a partially sectional perspective view of an electrical connector for a circuit board according to a second embodiment of the present invention. 2...Male contact, 20...Circuit board, 3
0,30A... Housing, 31... Main body, 3
2... Contact holding hole, 33... Opening groove, 3
6, 36A... Post part, 37, 37A... Connection opening groove, 38, 38A... Connection holding hole, 40, 4
0A...Female contact, 41...Contact part, 42...
...Contact protection part, 45...Contact tongue part, 46, 46
A... Connection section.

Claims (1)

[Claims for Utility Model Registration] (1) Comprising a housing and a plurality of female contacts disposed in the housing, the housing is in the shape of an L-shaped block, with one side serving as a main body and the other side serving as a post. , a plurality of contact holding holes extending toward the post portion and into which the female contacts are inserted are provided through the main body portion, respectively, so that the male contacts can be inserted through the openings on both sides;
Furthermore, each contact holding hole is formed with an opening groove extending with and communicating with the contact holding hole on the post-side surface of the main body portion, and the post portion is provided with a wiring opening groove communicating with the opening groove. The female contact has a contact portion held in the contact holding hole of the main body portion, and a wire connection portion connected to the contact portion and bent to be positioned in the wire connection opening groove of the post portion. An electrical connector for a circuit board, wherein the tip of the connection part protrudes from the post part so as to be able to contact the circuit board. (2) A wire connection holding hole is provided at the bottom of the wire connection opening groove of the post portion, and the wire connection hole penetrates to the opposite side, and the wire connection portion of the female contact is bent at a position corresponding to the wire connection holding hole and inserted and held there. Utility model registration claim No. 1 characterized by a protruding tip
Electrical connector for circuit boards as described in (1). (3) The electrical connector for a circuit board according to claim (2) of the utility model registration, characterized in that the wire connection holding holes are provided at a plurality of locations at the bottom of the wire connection opening groove. (4) The contact portion of the female connector includes a contact tongue portion that is located in the middle of the contact portion and has throat-like elasticity, and a contact tongue portion protection portion that guides the male terminal from the end side to the contact tongue portion. An electrical connector for a circuit board according to claim (1) of the utility model registration, characterized in that the electrical connector is provided with: