JPS608379Y2 - Press-fit type contact - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a press-fit type contact, and in particular, it is used in a multiplex connector attached to a printed circuit board, etc., and is inserted directly into a conductor through hole of the printed circuit board to connect it with electricity. This relates to a press-fit type contact that makes precise contact.

Conventionally, there are press-fit contacts of this type with various structures, but some of them do not provide sufficient electrical contact and mechanical engagement, or are difficult to manufacture and are expensive. None of them gave me complete satisfaction due to the high prices.

In view of the prior art, it is an object of the present invention to provide a press-fit contact of this type that provides sufficient electrical contact and mechanical engagement and is inexpensive.

Next, the present invention will be described in detail with regard to embodiments of the present invention based on the accompanying drawings.

FIG. 1 is a side view of a multiplex connector using press-fit contacts as an embodiment of the present invention.

In the insulating housing 10 of this multiplex connector, a large number of press-fit contacts 20 are arranged in two rows.

This multiplex connector is inserted into the printed circuit board 1 by press-fitting the press-fit contacts 20 into the through holes 2 of the printed circuit board 1, as shown in a partial cross section in FIG.

In FIG. 2, reference numeral 30 indicates a connected conductor, such as another printed circuit board, which is to be electrically connected to the conductor of the printed circuit board 1 via this multiplex connector.

FIG. 3 shows only one press-fit type contact disposed in the multiplex connector of FIG. 1, with the tip thereof broken and enlarged.

FIG. 4 shows only the press-fit type contact 20 seen from the direction of arrow A in FIG.

This press-fit type contact 20 is made of a conductive material with spring properties, and mainly includes a stop part 210, a contact part 220, a mounting part 230, a connecting part 240, and a locking part 250. , and a tip 260.

The contact portion 220 is curved to create a contact portion 221 that contacts a mating conductor inserted into the insulating housing 10, and has an elongated slot 222 formed along the center to improve springiness. .

The mounting portion 230 is wider than the contact portion 220, and as described later, the insulating housing 10 of the multiplex connector
Contactor attachments provided on both side walls of the contactor array opening are provided with protrusions 231 and 232 at two locations on the upper and lower sides of both side edges so as to be press-fitted into the grooves.

In this case, the protrusion heights of the protrusions 231 and 232 may be the same, but if the protrusion 232 is made to be somewhat higher than the protrusion 231, the press-fit engagement with the wall of the housing will be better in the final press-fit state. This is effective because the resultant force becomes more uniform on both sides.

A slot 233 is formed in the lower central part of the attachment part 230 to improve springiness.

The connecting portion 240 has an S′ gourd shape with a width that is press-fitted into the inner wall of the through hole 2 of a printed circuit board, etc., and has a raised portion 241 in the center thereof. It is formed.

For reasons described below, the gourd-shaped upward curve 242
It is preferable to make the maximum width of the downwardly curved portion 243 somewhat smaller than the maximum width of the downwardly curved portion 243 .

The raised dimensions of the raised portion 241 are such that when inserted into the through hole 2 of a printed circuit board or the like, this portion also press-fits into engagement with the inner wall of the through hole 2.

The locking portion 250 is provided with a locking tongue piece 251 formed by cutting and raising the center portion thereof.

The press-fit contacts 20, best shown in FIG. 3, are disposed in the insulating housing 10 of the multiplex connector in the following manner.

The insulating housing 10 has a mating conductor 30 in its center.
A conductor receiving opening 101 is provided for receiving the conductor, and contact array openings 102 are provided on both sides of the conductor receiving opening 101.

Contactors 20 are provided at the upper ends of both side walls of the contactor array opening 102.
A stop protrusion 103 is formed to be engaged by the stop part 210 of the contact array opening 102, and a stop protrusion 103 is formed at the lower end of both side walls of the contact arrangement opening 102. A groove 104 is formed.

The press-fit type contact 20 is inserted from below into the contact array opening 102, and the stopper 210 engages with the stopper protrusion 103,
The mounting section 230 is mounted to the insulating housing 10 so that both side edges of the section 230 fit into the mounting grooves 104.

In this state, the curved contact portion 221 of the contact portion 220 of the contactor 20 protrudes into the conductor receiving opening 101.

The contactor 20 located between the contact portion 220 and the mounting portion 230
The fulcrum portion 270 is in contact with the inner wall 105 of the opening 102 .

Furthermore, the upper and lower two protrusions 231 and 232 on both side edges of the mounting portion 230 are mounted on the inner wall 104A of the groove 104.
is in contact with.

Such a fulcrum part 270 and two upper and lower protrusions 23
1 and 232, the contactor 20 can be stably attached to the insulating housing 10.

Movement of the contact portion 220 of the contactor 20 to the left in FIG. When the side conductor 30 is inserted,
Depending on the thickness of the conductor 30, it can be elastically deflected in the direction of arrow B about the fulcrum portion 270.

Next, with particular reference to FIGS. 5 and 6, the function of the contact portion 240 when this multiplex connector is mounted on the printed circuit board 1 as shown in FIG. 2 will be described in detail.

FIG. 5 is a cross-sectional view of the connecting portion 240 of the contactor 20, showing a state in which the connecting portion 240 is press-fitted into the through hole 2 of the printed circuit board 1.

FIG. 6 is a longitudinal sectional view of that part.

As clearly shown in FIG. 5, the outer surfaces of the upper and lower curved portions 242 and 243 on both sides of the connecting portion 240 and the raised portion 241
The outer surface of the through hole 2 is in strong contact with the solder plating layer 2A provided on the inner wall of the through hole 2.

Therefore, when this press-fit type contact 20 is inserted into a through hole of a printed circuit board, it has good electrical contact and mechanical contact by elastic contact on three surfaces with the solder plating layer on the inner wall of the through hole. This is something that can be achieved through engagement.

Additionally, as best shown in FIG.
0 is shaped like a gourd, when the connecting portion 240 is press-fitted into the through-hole 2 of the printed circuit board 1, the solder powder 2B scraped off from the solder plating layer 2A on the inner wall of the through-hole during the press-fitting operation curves upward. The connecting portion 240 of the contact 20 can be filled and held between the portion 242 and the downwardly curved portion 243.
The electrical contact between the conductor portion of the printed circuit board 1 and the conductor portion of the printed circuit board 1 is further improved.

Furthermore, by making the maximum width dimension W2 of the downward curved portion 243 somewhat smaller than the maximum width dimension W□ of the upward curved portion 242, when inserting this connecting portion 240 into the through hole 2, first the width dimension is Preliminary press-fitting can be performed at the downwardly curved portion 243, which is somewhat smaller, and then main press-fitting can be smoothly performed at the upwardly curved portion 242, which has a somewhat larger width, so that even better press-fitting can be achieved.

As shown in FIG. 2, when the multiplex connector is attached to the board 1, the upper ends of the locking tongues 251 of the contacts 20 come into contact with the bottom surface of the board 1, and act to prevent the connector from coming off the board 1. .

In this case, if the thickness of the board 1 is sufficiently thick and the mechanical engagement between the connecting portion 240 of the contactor 20 and the inner wall of the through hole 2 of the board 1 prevents the connector from being removed, such a method may be used. A locking tongue is not required.

FIG. 7 is a view similar to FIG. 5 showing another embodiment of the press-fit type contact according to the present invention.

The contact connecting portion 240' of FIG. 7 differs from the contact connecting portion 240 of FIG. 5 in the following points.

In the connection portion 240 of the contact in FIG. 5, the curved portions 24 on both sides
2. Since the raised portion 241 is simply raised with respect to 243, the thickness centers of the curved portions 242 and 243 remain coincident with the thickness center of the contact, whereas in FIG. At the connection part 240' of the contact, curved parts 242' and 243' on both sides
are pushed out in the opposite direction to the raised portion 241', the thickness centers of the curved portions 242' and 243' are shifted to the left in FIG. 7 with respect to the thickness center of the contact. ing.

Furthermore, FIGS. 8 and 9 show only the portions of another embodiment of the press-fit type contact according to the present invention that are different from the aforementioned contact.

In the contact shown in FIG. 8, the locking tongue piece 251 of the locking part 250 of the contact shown in FIGS. The locking tongue pieces 251' are formed by cutting and raising both side edges.

The contact in FIG. 9 has a locking tongue piece 25 of a locking portion 250''
1'' is formed by cutting and raising the right edge.

Furthermore, FIG. 10 shows only the portions of yet another embodiment of the press-fit type contact according to the present invention that differ from the embodiments of FIGS. 3 and 4.

In contrast to the raised portions 241 of the contacts in FIGS. 3 and 4, which are connected to the contact body at the upper and lower ends,
As shown by reference numeral 244, the raised portion 241'' of the contact shown in FIG.

As mentioned above, the press-fit type contact of the present invention has a simple structure and can be manufactured at low cost, yet it provides good electrical contact and mechanical engagement with the substrate through-hole. This is convenient because it allows you to

[Brief explanation of drawings]

Figure 1 of the accompanying drawings is a side view of a multiplex connector using press-fit contacts as an embodiment of the present invention, and Figure 2 is a partial sectional view showing the connector of Figure 1 attached to a printed circuit board. , Fig. 3 is an enlarged cross-sectional view showing only one press-fit type contact disposed in the multiplex connector of Fig. 1 with the tip section broken off, and Fig. 4 is an enlarged view shown by the arrow A in Fig. 3. FIG. 5 is a cross-sectional view of the part showing the connection part of the contact being press-fitted into the through hole of the printed circuit board, and FIG. 6 is the view of FIG. FIG. 7 is a view similar to FIG. 5 showing another embodiment of the present invention, and FIGS. 8, 9, and 10 are parts of still another embodiment of the present invention. FIG. 1...Printed circuit board, 2...Through hole, 2A...Solder plating layer, 2B...
Solder powder, 10...Insulation housing, 101...
... Conductor receiving opening, 102 ... Contact array opening, 103 ... Stopping protrusion, 104 ...
...Mounting groove, 20...Press-fit type contact, 210
...Stopping part, 220...Contact part, 23
0...Mounting part, 240...Connection part,
241... Raised portion, 242... Upward curved part, 243... Downward curved part, 250...
...Locking part, 260...Tip part, 30...
...Mating conductor.

Claims (1)

[Scope of utility model registration request] In a press-fit type contact that is press-fitted into a through-hole having a conductor layer on the inner wall of a printed circuit board, etc., the connection part inserted into the through-hole is a roughly gourd-shaped plate-like body with a raised center part. 1. A press-fit type contact, characterized in that both side surfaces of the gourd-shaped plate-shaped body and the outer surface of the raised portion can come into contact with the conductor layer.