JPH0150072B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing an electrical connector for connecting a circuit board.

BACKGROUND TECHNOLOGY Conventionally, the methods of attaching an electrical connector to a printed circuit board include inserting the contact pins of the electrical connector into through-holes on the circuit board and soldering them, or installing contacts in the electrical circuit of the circuit board. There were some items to be soldered, but as the shape or pitch of the contact pins became smaller, problems such as soldering became difficult occurred.

In order to eliminate such inconveniences, an electrical connector for connecting a circuit board as disclosed in Japanese Utility Model Application Publication No. 61-8982 has recently been proposed. This electrical connector for connecting a circuit board is of a type that is mounted on the surface of a base circuit board, receives and couples a circuit board to be connected in a direction substantially perpendicular to the surface of the base circuit board, and is connected to an insulating housing. , the insulating housing has a plurality of contact pins arranged in the insulating housing, and the insulating housing has a board insertion hole for receiving the connected circuit board, and a board insertion hole provided spaced apart along the wall surface of the board insertion hole. a plurality of first contact pin receiving grooves, and a plurality of spaced apart second contacts that communicate with the first contact pin receiving grooves, extend in a direction substantially perpendicular thereto, and are open to the surface of the base circuit board. A pin receiving groove and a fulcrum portion disposed between the first contact pin receiving groove and the second contact pin receiving groove are provided, and each of the contact pins has a fulcrum portion disposed in the vicinity of the fulcrum portion. The shape is bent into an approximately L-shape, and one leg is connected to the corresponding first leg.
It has a first contact portion disposed in the contact pin receiving groove and in contact with the circuit conductor of the circuit board to be connected, and the other leg portion is disposed in the corresponding second contact pin receiving groove and contacts the base circuit. It is such that it has a second contact portion that contacts the circuit conductor on the surface of the substrate. When this electrical connector for circuit board connection is installed on the circuit conductor of the base circuit board, when the mating circuit board to be connected is inserted into the board insertion hole, the circuit conductor of the base circuit board and each contact pin are connected. The electrical contact with the second contact part is made stronger and therefore very reliable.

However, in this electrical connector for connecting a circuit board, the contact position between the second contact part of the contact pin and the circuit conductor of the base circuit board must be able to move each time the mating circuit board to be connected is connected or removed. It won't happen. Therefore, the contact pin must be kept in place with respect to the insulating housing in such a way that the contact pin can freely rotate. Further, the plurality of contact pins disposed within the insulating housing must all contact the circuit conductors of the connected circuit board and the base circuit board uniformly and with a certain degree of pressure. In order to meet these requirements, this type of electrical connector for connecting circuit boards has been manufactured using the following procedure.

(1) First, insert the contact pin elements one by one into the first contact pin receiving groove of the insulating housing.

(2) Bend the ends of the contact pin elements on the base circuit board connection side one by one using a tool such as pliers or a knife to form a second contact portion.

(3) Finally, bend the base of the attachment part of the insulating housing of the contact pin element one by one using a tool such as pliers or a tool to form a roughly L-shaped contact pin.

Problems to be Solved by the Invention However, the method of manufacturing the electrical connector for connecting a circuit board as described above has the following problems.

(1) Since contact pins are inserted and assembled one by one into an insulating housing, it is very time consuming and cannot be mass produced, resulting in high costs.

(2) Since each contact pin element is bent one by one, it is difficult to process them uniformly, and the contact pins tend to be uneven, causing contact with the circuit conductor of the connected circuit board or the circuit of the base circuit board. Contact with the conductor became very unstable and tended to be unreliable.

In view of these problems, the purpose of the present invention is to
It is an object of the present invention to provide a manufacturing method capable of providing an electrical connector for connecting a circuit board that can be mass-produced, is inexpensive, and has high reliability such as uniform electrical contact.

Means for Solving the Problems According to the present invention, a circuit board is mounted on the surface of a base circuit board and receives and couples a circuit board to be connected in a direction substantially perpendicular to the surface of the base circuit board. An electrical connector for connection, comprising an insulating housing and a plurality of contact pins disposed in the insulating housing, the insulating housing having a board insertion hole for receiving the connected circuit board, and a plurality of contact pins disposed in the insulating housing. a plurality of first contact pin receiving grooves spaced apart along the wall surface of the board insertion hole;
a plurality of spaced apart second contact pin receiving grooves that communicate with the first contact pin receiving groove, extend in a direction substantially perpendicular thereto, and are open to the surface of the base circuit board; and the first contact pin receiving groove. and a fulcrum portion disposed between the contact pin receiving groove and the second contact pin receiving groove, and each of the contact pins is bent into a substantially L-shape near the fulcrum portion; The leg portion has a first contact portion that is disposed in the corresponding first contact pin receiving groove and contacts the circuit conductor of the connected circuit board, and the other leg portion has a first contact portion that is disposed in the corresponding first contact pin receiving groove and that contacts the circuit conductor of the connected circuit board. A method for manufacturing an electrical connector for connecting a circuit board having a second contact portion disposed in a pin receiving groove and in contact with a circuit conductor on the surface of the base circuit board includes preparing the insulating housing. , preparing a contact pin member in which the first contact portion is formed and a plurality of otherwise substantially linear contact pin elements are connected by a connecting plate near the first contact portion; The linear portions of the contact pin elements are aligned with the corresponding first contact pin receiving grooves of the insulative housing and inserted through the board insertion holes, and then the tips of the linear portions of each of the contact pin elements that have passed through are aligned with the corresponding first contact pin receiving grooves of the insulating housing. The second contact portion is formed by bending the second contact portion approximately at right angles using a jig, and the entirety of each of the penetrating contact pin elements is bent into a corresponding second contact pin portion of the insulating housing using a jig. It is characterized by being bent into the groove.

Embodiments The present invention will now be described in more detail with reference to embodiments of the invention with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an embodiment of an electrical connector for connecting a circuit board manufactured according to the present invention. As shown in FIG. 1, the electrical connector for connecting a circuit board has an insulating housing 10 and a plurality of contact pins 20. As shown in FIG. The insulating housing 10 has a board insertion hole 11 and a board insertion hole 1.
A plurality of first
contact pin receiving grooves 12; and a plurality of spaced apart second contacts that communicate with the first contact pin receiving grooves 12, extend in a direction substantially orthogonal thereto, and are open to the surface of a base circuit board (not shown). It has a pin receiving groove 13 and a fulcrum portion 14 disposed between the first contact pin receiving groove 12 and the second contact pin receiving groove 13. Each contact pin 20 is bent into a substantially L-shape near the fulcrum 14, and one leg is disposed in the corresponding first contact pin receiving groove 12 and is connected to the connected circuit board P. It has a first contact portion 22 that contacts the circuit conductor P′, and the other leg portion is disposed in the corresponding second contact pin receiving groove 13 and contacts the circuit conductor on the surface of the base circuit board. It has a second contact portion 21 . Further, an insulating housing 10 is provided in the middle part of the contact pin 20.
A protrusion 23 is provided to hold the contact pin in the first contact pin receiving groove 12 and prevent it from coming off downward. As described above, in the electrical connector for connecting a circuit board configured in this way, when the circuit board P to be connected is inserted into the board insertion hole 11, the second contact portion 21 tends to be shifted downward, Therefore, it is brought into pressure contact with the circuit conductor of the base circuit board.

Next, a second embodiment of the method of manufacturing such an electrical connector for connecting a circuit board according to the present invention will be described.
This will be explained with reference to FIGS.

(1) First, an insulating housing 10 having the structure as described in FIG. 1 is prepared by integrally molding, for example, a plastic material.

(2) Also, as shown in the perspective view in Figure 2, the first
A contact pin member 30 in which a plurality of contact pin elements 20', which are formed with a contact part 22 and a protruding part 23 and are otherwise substantially straight, are connected by a connecting plate 33 via a notch part 32 near the first contact part 22.
are prepared by integral processing using a springy and conductive metal material. It is preferable that the connecting plate 33 is provided with a hole 31 for feeding.

(3) As shown in a perspective view in FIG.
The substrates are aligned and inserted through the substrate insertion hole 11. This state is shown in cross-section in FIG.

(4) In this embodiment, in the state shown in FIG. 3, the connecting plate 33 is separated from each contact pin element 20' by bending the notch portion 32. However, the connecting plate 33 may be separated at the last stage of the manufacturing process.

(5) Next, as shown in FIG. 4, the straight portion 21' of the contact pin element 20' protruding from below the insulating housing 10 is held between the left and right sides by the holding molds 30A and 30B. In this state, the bending fitting 31 is moved from the right to the left.

(6) Then, as shown in FIG. 5, the tip of the straight portion 21' of the contact pin element 20' is approximately 90
The second contact portion 21 is formed.
Then, the bending fitting 31 and the clamping molds 30A, 3
Return 0B to its original position.

(7) Finally, as shown in FIG. 6, a bending die 40 is installed under the insulating housing 10, and the bending die 41 is moved upward from diagonally downward to form the protruding straight line of the contact pin element. The entire portion 21' is bent near the fulcrum portion 14.

FIG. 7 is a sectional view showing an electrical connector for connecting a circuit board according to another embodiment of the manufacturing method of the present invention. This connector has an insulating housing 10A
Contact pins 20, 20 are arranged in two rows on both sides. The method of manufacturing this connector according to the present invention is as follows.

(1) As in the previous embodiment, first, an insulating housing 10A having a shape as shown in cross-sectional views in FIGS. 7 and 8B is prepared.

(2) Two sets of contact pin members 30 as prepared in Section 2 of the above embodiment are prepared, and as shown in FIG. 8A, they are placed facing each other in parallel and with insulation properties as shown in FIG. 8B. It is placed on the housing 10A.

(3) Next, the contact pin member 30 placed side by side,
The straight portions of the 30 contact pin elements are inserted into each of the two rows of first contact pin receiving grooves 12A of the insulating housing. This state is shown in cross section in FIG. And the connecting plate 33,
33 is separated from the contact pin element.

(4) Then, as shown in FIG. 10, turn the insulating housing 10A upside down and insert the bending molds 50, 50 to the height of the part where the second contact part 21 of the straight part of the contact pin element is to be formed. Then, the tip of the straight portion is bent appropriately using the first bending fitting 51 from above. This is done because it is difficult to bend the tip 90 degrees at once, and this step may be omitted.

(5) Next, as shown in FIG.
A contact portion 21 is formed.

(6) Finally, as shown in FIG. 12, install the bending fitting 61 on the insulating housing 10A,
It is lowered from above to bend the entirety of each linear portion near each fulcrum portion 14 .

FIGS. 13 and 14 show a manufacturing method of yet another embodiment of the present invention. This is the 10th
This method is effective when applied in place of the steps explained in FIGS. 11 and 11. That is, the bending molds 50, 50 are installed up to the height of the second contact portion 21 in the same manner as in FIGS. 10 and 11, but above them, as shown in FIG. Bending molds 70, 70 with springs 71 are installed symmetrically. Further, on top of that, bending molds 70, 7
A movable tool 72 is provided for moving 0 left and right. In this state, as shown in FIG. 14, when the movable tool 72 is moved downward, the bending dies 70, 70 are moved left and right against the elastic deflection force of the springs 70, 70. . Bending mold 70, 70
The lower end of the straight part 2 of each contact pin element
1', it is bent all at once to 90 degrees, as shown in Figure 14, and the second
A contact portion 21 is formed. In this embodiment, the bending molds 70, 70 are moved by the movable tool 72, but other moving devices such as electric power, magnetic force, air cylinder, etc. can also be used.

Effects of the Invention According to the manufacturing method of the present invention as described above, the following effects can be obtained.

(1) Since the contact pins can be incorporated into the insulating housing very easily and are suitable for mass production, it is possible to provide a very inexpensive electrical connector for connecting a circuit board as a whole.

(2) After inserting all the contact pin elements into the first contact pin receiving groove of the insulating housing, the bending process is performed at once, so that uniform bending process is possible, and the first contact part and the first contact part of each contact pin Electrical contact between the two contact portions, the connected circuit board, and the base circuit board can be made stable, and an extremely reliable electrical connector for connecting a circuit board can be provided.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of an electrical connector for connecting to a circuit board manufactured according to the present invention, and FIGS. 2 to 6 show a method for manufacturing the electrical connector for connecting to a circuit board shown in FIG. 1. A perspective view and a cross-sectional view for explaining one example, FIG. 7 is a cross-sectional view showing an electrical connector for connecting a circuit board according to another embodiment of the manufacturing method of the present invention, and FIGS. 8 to 12 are the same as those shown in FIG. 13 and 14 are cross-sectional views for explaining a method of manufacturing an electrical connector for connecting a circuit board, and FIGS. 13 and 14 are cross-sectional views for explaining still another embodiment of the present invention. P...Connected circuit board, P'...Circuit conductor board, 10
...Insulating housing, 11 ... Board insertion hole, 1
2...First contact pin receiving groove, 13...Second
Contact pin receiving groove, 14... Fulcrum part, 20...
...Contact pin, 20'...Contact pin element, 21...Second contact portion, 21'...Straight portion,
22...First contact part, 23...Protrusion part, 30...
Contact pin member, 31... feed hole, 32...
Notch part, 33... Connection plate, 30A, 30B...
Bending die, 31...Bending metal fitting, 40...Bending die, 41...Bending metal fitting.

Claims (1)

[Scope of Claims] 1. An electrical connector for connecting a circuit board, which is mounted on the surface of a base circuit board and receives and couples a circuit board to be connected in a direction substantially perpendicular to the surface of the base circuit board. has an insulating housing and a plurality of contact pins disposed in the insulating housing, the insulating housing has a board insertion hole for receiving the connected circuit board, and a board insertion hole along the wall surface of the board insertion hole. a plurality of first contact pin receiving grooves that are spaced apart from each other; and a plurality of first contact pin receiving grooves that communicate with the first contact pin receiving grooves, extend in a direction substantially perpendicular thereto, and are open to the surface of the base circuit board. A spaced apart second contact pin receiving groove and a fulcrum portion disposed between the first contact pin receiving groove and the second contact pin receiving groove are provided, and each of the contact pins has a
It has a shape bent into a substantially L-shape near the fulcrum part, and one leg part is a first contact pin receiving groove disposed in the corresponding first contact pin receiving groove and in contact with a circuit conductor of the connected circuit board. The other leg has a second contact portion disposed in the corresponding second contact pin receiving groove and in contact with the circuit board on the surface of the base circuit board. In a method of manufacturing an electrical connector for connecting a circuit board,
preparing the insulating housing, forming a contact pin member in which the first contact portion is formed, and a plurality of otherwise substantially straight contact pin elements connected by a connecting plate near the first contact portion; The linear portions of the plurality of contact pin elements of the contact pin member are aligned with the corresponding first contact pin receiving grooves of the insulative housing and inserted through the board insertion hole, and then each of the contact pins that have passed through the substrate insertion hole are arranged. bending the tip of the linear part of the element at a substantially right angle using a jig to form the second contact part;
A method of manufacturing an electrical connector for connecting a circuit board, characterized in that the entirety of each of the penetrating contact pin elements is bent into each of the corresponding second contact pin receiving grooves of the insulating housing using a jig. 2. The method of manufacturing an electrical connector for connecting a circuit board according to claim 1, wherein the connecting plate is separated from the contact pin element before forming the second contact portion. 3. The method of manufacturing an electrical connector for connecting a circuit board according to claim 1, wherein the connecting plate is separated at the end. 4. The first contact pin receiving groove is provided only on one wall surface of the substrate insertion hole of the insulating housing.
A method for manufacturing an electrical connector for connecting a circuit board according to item 1 or 3. 5. The first contact pin receiving groove is provided on both sides of the board insertion hole of the insulating housing.
A method for manufacturing an electrical connector for connecting a circuit board as described in . 6. The method of manufacturing an electrical connector for connecting a circuit board according to claim 4, wherein only one pair of the contact pin members is prepared. 7. Two pairs of the contact pin members are prepared,
6. The method of manufacturing an electrical connector for connecting a circuit board according to claim 5, wherein the electrical connector is disposed through the board insertion hole of the insulating housing so as to be aligned with the first contact pin receiving groove on each side. 8. Formation of the second contact portion is performed simultaneously on the penetrating linear portions of the contact pin elements on both sides, and the bending of the entire penetrating linear portion is also performed on both sides simultaneously. A method for manufacturing an electrical connector for connecting a circuit board according to item 7.