JPS5826153B2 - multipole connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-pole connector, and particularly to a multi-pole connector suitable for high-density packaging of electronic equipment.

Recently, things such as leadless ICs, leadless LSIs, and printed circuit boards (herein referred to as "daughter boards") have become popular.
A variety of connectors have been developed for mounting on motherboards (called "motherboards").

This type of connector generally has a structure in which a step is provided on the inner side of a rectangular frame-shaped housing, and a number of contacts are incorporated along the step. By fitting and attaching the daughterboard to the motherboard and making contact with the contacts, the circuits on the daughterboard can be connected to the circuits on the motherboard.

If the contacts are assembled simply by press-fitting, if the press-fitting force is weak, external forces such as vibrations (due to packaging, transportation, etc.) may cause the contacts to lift up or come out.

Also, when attaching a connector to a motherboard, if the terminals are not aligned properly, the contacts may move up and down due to resistance when inserted into the through-holes of the board, causing the contacts to become uneven and cause the mating connection to Since the contact force changes, this may cause poor contact or deformation of the contact.

Therefore, an object of the present invention is to provide a multi-pole connector that does not cause the contacts to become loose or easily come off from the housing even if the contacts are used for a long period of time while being under pressure. be.

Next, the present invention will be described using examples with reference to the drawings.

1 to 4 show the overall schematic structure and usage of an embodiment of the multi-pole connector according to the present invention.

First, a stepped portion 11 is provided inside a rectangular frame-shaped insulating housing 1, and a plurality of conductive contacts 2 are attached to this housing 1.
are assembled in two rows along the stepped portion 11 with the contact portion 21 at one end exposed.

The housing 1 incorporating the contacts 2 in this manner is installed on the motherboard 3.

At this time, the terminal portion 22 at the other end of the contact 2 is inserted into the through hole 31 of the motherboard 3, and the terminal portion 22 is soldered to the through hole 31.

Further, the daughter board 4 is fitted into the stepped portion 11 of the housing 1, and a rectangular frame-shaped presser plate 5 is applied from above.

Then, insert the L-shaped protrusion 61 of the locking member 6 into the slit 51 of the holding plate 5 and the hole 12 of the housing 1, and then slide the locking member 6 to one side in the longitudinal direction to insert the L-shaped protrusion 61 into the end of the housing 1. 13.

As a result, the presser plate 5 is fixed.

In this way, the daughter board 4 is fixed to the step part 11 of the housing 1 by the inner part of the presser plate 5, and the connection part, that is, the connection pad 41 provided on the edge part of the daughter board 4 is connected to the contact part 21 of the contact 2. Make pressure contact.

Therefore, the circuit elements mounted on the daughter board 4 are electrically connected to the circuits on the motherboard 3 via the contacts 2.

The individual contacts 2 all have the same shape and dimensions, and can be made by pressing a plate material.

One example, as shown in FIG. 5, has a bent portion 23 between a contact portion 21 at one end and a terminal portion 22 at the other end.

A portion continuing from the bent portion 23 toward the contact portion 21 is a flat portion 24 that is perpendicular to the central axis of extension of the terminal portion 22, and a portion between the flat portion 24 and the contact portion 21 is a flat portion 24. As shown in Figure 6 without the daughter board attached, it is inclined at an angle θ.

This contact 2 is located in the contact housing hole 1 of the housing 1.
4 from the terminal section 22 side.

In order to maintain this inserted state, the contact 2 has a locking spring 25 whose free end protrudes toward one side in the portion housed in the contact housing hole 14, and a locking spring 25 on the same side as the locking spring 25. It has a protruding convex portion 27, and also has a shoulder portion 26 extending in the board width direction at a portion exposed from the contact receiving hole 14 toward the bent portion 23 side.

The contact accommodating hole 14 of the housing 1 is press-fitted so as to receive a compressive force in the width direction of the plate.

In the contact 2 press-fitted into the contact housing hole 14, the free end of the locking spring 25 is inserted into the contact housing hole 14.
By engaging with the retaining portion 15 on the wall surface of the housing 1, it is prevented from coming off toward the contact portion 21 side, and by engaging the shoulder portion 26 with the end surface 16 of the housing 1 (see FIG. 4), the terminal portion 22 side is prevented. The contact 2 is prevented from coming off, and the convex portion 27 is pressed against the wall surface of the contact receiving hole 14, thereby positioning the entire contact 2.

Note that one contact 2 may be assembled into the housing 1, but when making the contact 2 by press working, the shoulder portion 26 is left connected to the rest of the base material 1 as shown in FIG. After incorporating many pieces at the same time, the remaining base material 7
The work efficiency can be improved by folding the contacts 2 backwards and folding them at the groove 8, thereby cutting them into individual contacts 2.

Now, the terminal portion 22 of the contact 2 is provided on one side in the board width direction.

In other words, in FIG. 8, the through holes 31 are formed in a square lattice shape with a hole interval of P, and the connecting portions 41 are formed with an interval of 1.
When arranged at /2P, the contact 2 is manufactured to have a terminal portion at a position 1/4P apart from the center of the contact portion 21.

The contacts 2 are rotated 180 degrees to the housing 1 so that the thickness centers of the terminal parts 22 face each other with a distance P apart from each other, and the width centers of the terminal parts 22 are adjacent to each other with a distance P apart from each other. Incorporated.

As a result, the through holes 31 are arranged in two rows in a square grid.
The terminal portions 22 are inserted in a one-to-one correspondence with each other, and the contact portions 21 come into contact with the connection portions 41 arranged in two rows in a staggered manner in a one-to-one manner.

When the contact points between the contact portions 21 and the connection portions 41 are arranged in a staggered manner as described above, the density of the contact points can be increased, and the through holes 31 of the motherboard 3 form a square lattice shape. This makes it easier to perform printed wiring on the motherboard 3.

Furthermore, the terminal portion 22 has a protruding portion 2 on one side in the board width direction.
It has 8.

The protruding portion 28 is positioned below the through hole 31 when the terminal portion 22 is inserted into the through hole 31, and serves to prevent the connector from floating up by engaging with the lower edge portion of the through hole 31.

As explained above, according to the present invention, the free end of the locking spring of the contact can be prevented from coming off toward the contact part side when assembled in the contact housing hole of the housing. The shoulder of the contact engages with the end face of the housing, and furthermore, the solid protrusion of the contact is pressed against the wall of the contact receiving hole. By doing this, the entire contact can be positioned, and a multi-pole connector can be obtained in which the contact does not increase rattling or come off.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the present invention shown in use with one part cut away; Fig. 2 is an exploded perspective view of Fig. 1;
A sectional view taken along the line l-11 in the figure, Figure 4 is the
5 is a perspective view of a used contact, FIG. 6 is a sectional view of the contact in an unused state, FIG. 7 is a perspective view showing one line of contact manufacturing, and FIG. FIG. 8 is a diagram showing the mutual relationship between the through-hole positions on the motherboard, the connection portion positions on the daughter board, and the contact positions. 1... Housing, 2... Contact, 3... Motherboard, 4... Daughter board, 14... Contact accommodation hole, 15.
...Engagement portion, 16...End face, 21...
...Contact part, 22...Terminal part, 25.
...Locking spring, 26...Shoulder, 27.
...Protrusion.

Claims (1)

[Claims] 1 One end has a contact part that is press-connected to a connection part provided on a flat daughter board on which a circuit element is mounted, and the other end has a contact part that is inserted into a connection through hole of a motherboard for making a circuit connection. The contact includes a conductive contact molded from a plurality of plate-like materials having a terminal portion, and an insulating housing having a plurality of contact accommodation holes separately accommodating the plurality of contacts, and the contact includes: A locking spring whose one end side is a free end and protrudes to one side is housed in the contact housing hole, and a locking spring that protrudes to the same side as the locking spring and is attached to the wall surface of the contact housing hole. a pressed solid convex portion, and a shoulder portion extending in the plate width direction and engaging with the end surface of the housing at a portion exposed from the contact receiving hole to the one end side; On the other hand, the housing has an engaging portion on a wall surface of the contact receiving hole that engages with the free end of the locking spring to prevent the contact from coming off toward the one end. Multi-pole connector.