JP2890769B2 - Board connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to a board connector in which a plurality of connection electrodes are aligned on both sides along an edge, and the board is mounted on the edge with the substrate sandwiched between the both sides. The object of the present invention is to reduce the insertion force of the board into the connector to facilitate the work of inserting the board, and to improve the contact reliability by preventing deformation and buckling of the contact of the connector terminal at the time of mounting. The contacts protruding from the insulator in two rows corresponding to the connection electrodes of the substrate having a plurality of connection electrodes on both sides along the edge, the minimum distance between the rows at the middle in the longitudinal direction is smaller than the thickness of the substrate. A connector for a board formed so as to be formed from the back side of a contact forming surface to a square hole formed between the contact rows of the insulator and penetrating with a length exceeding the contact row length. Spacer that can be attached to and detached from the insulator by inserting and removing The spacer has a thickness that is widened so that the interval between the rows of the contact ends exceeds the substrate thickness when the spacer is mounted on the insulator, and the spacer is inserted between the contact rows. It is configured to be extruded from the insulator.

[Industrial applications]

The present invention relates to a configuration of a board connector to be mounted on a board in which a plurality of connection electrodes are aligned on both surfaces along an edge, and more particularly, to facilitate the work of mounting a board by reducing the insertion force of the board into the connector. Also, the present invention relates to a board connector that improves contact reliability by preventing deformation and buckling of contacts of a connector terminal at the time of mounting, thereby improving productivity.

With the recent increase in the density of electronic devices, there has been a strong demand for high-density board connectors having a small pitch between adjacent contacts and a small width of each contact.

In this case, especially in a high-density connector with a large number of terminals, the insertion force of the board into the connector increases, and the contact portion of the connector terminal may be deformed or buckled by contact with the board edge when the board is inserted, and the contact reliability may be reduced. Since no improvement in reliability and reliability can be expected, a solution is desired.

[Conventional technology]

FIG. 2 is a diagram showing an example of a main part configuration of a conventional board connector.

Note that, in the drawing, a case where the board connector is a plug connector will be described.

In the figure, (1) is a perspective view, and (2) is a cross-sectional view taken along a line a ′ of (1).

2 (1) and 2 (2), the plug connector 1 as viewed from the substrate mounting side is configured by implanting a plurality of plug terminals 3 in an integrally formed insulator 2 in a matrix of two upper and lower rows. It is a thing.

In particular, the plug terminal 3 in this case is a plug contact that is inserted once and connected to a jack connector (not shown).
3a is formed so as to protrude from the front surface (the opposite surface in the figure) of the insulator 2, and the other end of the insulator 2 protruding from the rear surface (the front surface in the diagram) is indicated by a chain line. The contacts 3b connected to the plurality of connection electrodes formed at predetermined pitches on the front and back surfaces near the end side of the substrate 4 to be mounted shown in FIG. connection interval c in narrow and tip of the contact piece 3b than the distance c ₁ between the electrodes 4a 'inner to be greater than the thickness t of the substrate 4 is formed by bending in an arc-shaped convex.

The point p at which the minimum distance c of the contact 3b is formed.
Is located within the region where the connection electrode 4a is formed on the substrate 4 when the front end side of the substrate 4 abuts on the rear surface of the insulator 2.

Therefore, when the board 4 is inserted between the two rows of contacts 3b of the plug connector 1 in the direction of arrow b, the leading edge portion of the board 4 pushes the inner side of the contacts 3b and is inserted. The contact 3b and the connection electrode 4a can be stably brought into contact with each other when the front end surface of the contact member abuts against the rear surface of the insulator 2.

If the board 4 is pulled out as it is, the board 4 can be easily removed from the plug connector 1.

When the plug connector 1 and the board 4 are connected by soldering, the board 4 is inserted to the predetermined position in a state where a solder paste or the like is applied to the connection electrodes 4a of the board 4 and, for example, infrared heating or vapor phase heating (Vaper heating) is performed. By applying Phase Soldering, etc., both can be connected by soldering.

However, in the board connector having such a configuration, the contact
It is necessary to strictly regulate the distances c and c 'between the electrodes 3b, and to maintain the arrangement of the contacts 3b projecting from the rear surface of the insulator 2 in the column direction without bending.

For example, when the distance c ′ is smaller than the thickness t of the substrate 4, the contact 3 b is deformed or buckled when the substrate 4 is inserted.
and c larger even slightly than ₁ and the connection electrodes 4a and contacts 3b and thus not connected to an open without contact.

Also, if the arrangement of the contacts 3b in the column direction is bent, the same deformation, buckling and contact failure as described above will occur even if the intervals c and c 'between the corresponding contacts 3b are correct.

Therefore, conventionally, the shape of the contact and the bending in the column direction are observed, and if necessary, the substrate is inserted after being corrected with a jig or the like.

On the other hand, when the density of the connector is increased, the width of the contact 3b itself is reduced together with the pitch between adjacent terminals in the row direction, and each contact 3b is weakened in strength and the number of terminals is increased. There is a disadvantage that the work of inserting the board 4 into the plug connector 1 becomes more difficult in combination with an increase in the insertion force into the plug connector 1.

[Problems to be solved by the invention]

With conventional board connectors, it is necessary to observe and correct the contact parts to ensure reliable contact with the board, so there is a problem that it takes a lot of man-hours and cannot expect an improvement in productivity. In the case of an integrated connector, there is a problem that the work of inserting the board into the plug connector becomes difficult.

[Means for solving the problem]

The above problem is that the contacts protruding from the insulator in two rows corresponding to the connection electrodes of the substrate having a plurality of connection electrodes on both sides along the edge, the minimum spacing between the rows in the middle in the longitudinal direction is the above-mentioned. A connector for a board formed so as to have a thickness smaller than a thickness of a board, wherein a contact is formed in a square hole penetrating through a length of the contact row formed between the contact rows of the insulator. A spacer that can be attached to and detached from the insulator by insertion and removal from the back side of the surface, wherein the spacer is arranged such that an interval between rows of the contact tips exceeds a substrate thickness when the spacer is attached to the insulator. The problem is solved by a board connector having a thickness that can be expanded and configured to be pushed out of the insulator by insertion of the board between contact rows.

(Operation)

After inserting the board between the contact rows in a state in which the interval between the contact rows of the connector in which the minimum spacing between the rows of the contacts is sufficiently narrower than the spacing between the connection electrodes on the front and back surfaces of the board is forcibly expanded. When the forcible expanding means of the inter-row interval is removed, the substrate can be inserted without causing deformation and buckling of the contact, and contact failure between the contact connecting electrodes can be eliminated.

In this description, a spacer is inserted between the contact rows of the connector so as to increase the spacing between the rows of the contacts, and the connector is configured such that the spacer can be removed as the board is inserted.

Therefore, it is not necessary to strictly control the spacing between the rows of the contacts, the bending in the row direction, and the like, and a board connector to which a board can be mounted with high productivity can be realized.

〔Example〕

FIGS. 1A and 1B are diagrams illustrating a board connector according to the present invention, wherein FIG. 1A is a configuration diagram, FIG. 1B is an overall view, and FIG.

FIG. 1 (A) using a plug connector as an example as in FIG.
The plug connector 11 for the board has a square hole 12a in the center part along the longitudinal direction and a square concave part 12c around the stepped surface 12b.
And a plurality of plug terminals 13 planted in two rows in the longitudinal direction at the same pitch as in FIG. A spacer 14 having a flange 14a around one end surface thereof
It is composed of

Of these, the square hole 12a formed in the insulator 12 has a length in the longitudinal direction at least covering the area where the plug terminal 13 is to be planted, and a width in the front-to-back connection of the substrate 4 described in FIG. The width is formed to exceed the interval (c ₁ ) between the electrodes.

Similarly to the plug terminal 3 shown in FIG. 2, the plug terminal 13 has at one end a plug contact 13a inserted and connected to a jack connector (not shown) projecting from the upper surface of the insulator 12. At the other end protruding from the lower surface of the contact 12, a contact 13 b similar to the contact 3 b in FIG. 2 has a minimum distance C between its rows that is sufficiently smaller than the thickness t of the substrate 4 described in FIG. The inner side is bent into a convex arc shape so as to have a thickness of about half of the plate thickness.

Further, the height H of the portion of the spacer 14 that fits into the square hole 12a of the insulator 12 is determined when the spacer 14 is inserted into the insulator 12 until the flange 14a contacts the step surface 12b of the insulator 12. The tip of the contact 13b of the plug terminal 13 is located at least at a position beyond the point P forming the minimum interval c between the rows, and the width W of the portion is equal to the square hole 12a.
It is formed in a size that can slide.

Therefore, when the spacer 14 with the flange 14a facing upward from the concave portion 12c side of the insulator 12 is inserted into the square hole 12a from the distal end side, the distal end portion of the spacer 14 is inserted while expanding the inner surface of the contact 13b. The required plug connector 11 shown in (B) can be obtained.

Particularly, in this case, even if the contact 13b is deformed or has a dimensional variation, since the thickness W of the spacer 14 is larger than the thickness t of the substrate 4, the distance c 'between the tips of the contact 13b is smaller than that of the substrate. 4 is sufficiently large with respect to the thickness t, and even if each contact 13b is bent in the column direction, it is automatically corrected by the spacer 14.

Next, as shown in FIG. 2, when the substrate 4 is inserted between the two rows of contacts 13b, the leading end of the substrate presses the bottom of the spacer 14 to push up the spacer 14, and as shown in FIG. The contact 13b pressing the side surface of the spacer 14 moves to the surface of the substrate 4 as it is and presses the substrate surface.

The connection between the contact 13b and the connection electrode 4a of the substrate 4 when the tip of the substrate 4 comes into contact with the lower surface of the insulator 12 is the same as in the case of FIG.

The spacer 14 can be removed from the upper part of the insulator 12 as it is.

In the case of such a board connector, even if there is variation or deformation in the shape of the contact 13b in which the minimum distance c between the rows is sufficiently smaller than the thickness of the board 4 in the initial state, the board 4 is formed by the spacer 14. Since it is automatically corrected so that it can be inserted with a margin, it does not cause deformation or buckling due to the substrate when the substrate is inserted, and also ensures the contact pressure of the contact 13b against the substrate 4 and thus the connection electrode 4a. As a result, it is possible to obtain stable contact characteristics, and even if the number of terminals increases due to the high density of the connector, both can be connected by the same board insertion work, so that the number of terminals corresponding to the increase in the number of terminals The input of the insertion board can be reduced, and the work of mounting the board can be facilitated.

Further, since the spacers 14 are mounted between the rows of the contacts 13b, there is no need to increase the size of the plug connector 13, and there is an advantage that the mounting spacer for the substrate can be set in the same manner as before.

〔The invention's effect〕

As described above, according to the present invention, it is possible to facilitate the mounting operation of the substrate by reducing the insertion force of the substrate into the connector, and to improve the contact reliability by preventing the deformation and buckling of the contacts of the connector terminal during the mounting. It is possible to provide a board connector with improved performance.

In the description of the present invention, the case where the connector is a plug connector is described, but the same effect can be obtained even when the connector is a jack connector.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a board connector according to the present invention, and FIG. 2 is a diagram showing an example of a main part configuration of a conventional board connector. In the figure, 4 is a substrate, 4a is a connection electrode, 11 is a plug connector, 12 is an insulator, 12a is a square hole, 12b is a stepped surface, 12c is a recess, 13 is a plug terminal, 13a is a plug contact, and 13b is a contact. , 14 denotes a spacer, and 14a denotes a flange.

Claims (1)

(57) [Claims] 1. A contact having a plurality of connection electrodes extending along an edge on a substrate having a plurality of connection electrodes on both sides thereof, the contacts protruding from the insulator in two rows corresponding to the connection electrodes, and the minimum distance between the rows in the middle in the longitudinal direction is set to the minimum. A connector for a board formed so as to have a thickness smaller than a thickness of a board, wherein a contact is formed in a square hole penetrating with a length exceeding the contact row length formed between the contact rows of the insulator. A spacer that can be attached to and detached from the insulator by insertion and removal from the back side of the surface, wherein the spacer is arranged such that the row-to-row spacing of the contact tips exceeds the thickness of the substrate when the spacer is attached to the insulator. A board connector having an expanded thickness, wherein the board connector is configured to be pushed out of the insulator by insertion of the board between contact rows.