JPH0332071Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Summary] Surf Ace mount connects the lead part of the lead terminal to the conductor pattern of the wiring board by soldering.
(SMT) connector, the insulator has a means for pressing the middle part of the lead part led out from the insulator against the conductor pattern on the wiring board, making it easy to solder the lead part and the conductor pattern. And it has been confirmed.

[Industrial application field]

The present invention relates to connectors for electrically connecting circuits or devices, and in particular to improvements in SMT connectors that are miniaturized and mounted or attached to wiring boards and soldered, like various electronic components.

[Conventional technology]

FIG. 4 is a side view (a) of a conventionally configured connector and an explanatory diagram (b) of a method for mounting it on a wiring board, and FIG. 5 is a side view of another conventionally configured connector inserted into a wiring board.

In FIG. 4, the connector 1 has a plurality of lead terminals 3 extending in parallel from the rear end surface (left end surface in the figure) of an insulator 2 in the thickness direction of the drawing.
Therefore, since the bending height h of each lead part 3, which is formed into a Z-shape by punching out a metal plate having spring properties and then bending, has a variation of about 0.1 mm,
When the connector 1 is mounted on the wiring board 4 and each lead part 3 is soldered to the conductor pattern 5 of the wiring board 4, the insulator 2 is pressed against the wiring board 4 with an appropriate pressing force _P1 .

In FIG. 5, the connector 6 has a plurality of lead terminals embedded in an insulator 7 in two rows in the thickness direction of the drawing, and a conductor pattern 9 is formed on both sides of one end (lower end in the drawing). The formed wiring board 10 is led out from the insulator 7 and inserted between the lead portions 8 of the opposing lead terminals, and the contacting lead portions 8 and the conductor pattern 9 are connected by solder. At that time, even if there are variations in the shape of the lead part 8 (bending height),
In order to ensure contact between all the lead parts 8 and the conductor patterns 9, the structure is such that all the lead parts 8 are pushed outward when the wiring board 10 is inserted with an appropriate pressing force _P2 .

[Problem that the invention attempts to solve]

As explained above, the conventional connector 1 is mounted on the wiring board 4 and pressed when soldering.
The pressing force P ₁ for elastically deforming the entirety of all the lead parts 3 becomes relatively large so that the lead parts 3 that have come up due to unevenness in the bending process come into contact with each other.
Therefore, it has been difficult to completely eliminate the lead portions 3 that do not make contact.

On the other hand, when the wiring board 10 is inserted into the lead portion 8 of the conventional connector 6, the contact portion with the conductive pattern 9 is pushed and spread out. Therefore, the stiffness of the lead portion 8 is set to be appropriately weak to facilitate elastic deformation and to reduce the insertion force of the wiring board.

However, as shown in an enlarged view of a portion of the conductive pattern forming end surface of the wiring board 10 in FIG. There is no problem, but the lead portion 8b that is shifted laterally from the conductor pattern 9,
When the wiring board 10 is inserted and expanded, as shown by the arrow in the figure, the solder 11, which is rounded due to the surface tension during solidification, falls to the side of the conductor pattern 9 and short-circuits with the adjacent conductor pattern 9. I had something to do.

[Means for solving problems]

FIGS. 1A and 1B are explanatory diagrams of an example of the basic configuration of the present invention and a method of mounting the connector on a wiring board.

In FIG. 1, in which the same reference numerals are used for parts common to those in the previous figure, the connector 21 has a plurality of lead terminals embedded in an insulator 22 in parallel in the thickness direction of the drawing, and the lead portions of the lead terminals are At the upper part of the rear end surface (left end surface in the drawing) of the insulator 22 from which the lead 23 is led out, there is a pressing means 25 that is formed integrally with the insulator 22 via a thin wall portion 24 and faces above the lead portion 23 .

When the connector 21 is placed at a predetermined position on the wiring board 4 and a pressing force P ₃ is applied to the pressing means 25, the pressing means 25 rotates downward about the thin-walled portion 24 as an axis of rotation, and the lower end surface of the pressing means 25 presses the portion of the lead portion 23 beyond the bent portion onto the conductor pattern 5, and in this state, the lead portion 23 is pressed against the conductor pattern 5.
The work of mounting the connector 21 on the wiring board 4 by soldering is completed.

[Effect]

According to the above means, the pressing force that brings the lead part into contact with the conductor pattern is applied to the middle part of the lead part, and the lead part that is separated from the conductor pattern and is inconvenient for soldering is pressed before the normal lead part. do. Therefore, the pressing force can be made weaker than the conventional pressing force P ₁ , and it also prevents the lead from shifting laterally due to the frictional force of the pressing means coming into contact with the top surface of the lead, making it compatible with the conductor pattern (solder 11). This effect was achieved.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Connectors according to embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a partially cutaway perspective view of a connector according to an embodiment of the present invention, and FIG. 3 is a side view of a connector according to another embodiment of the present invention.

In FIG. 2, the connector 31 has a plurality of lead terminals implanted in a row on an insulator 32 made of molded plastic. V-shaped cross-sectional groove (thin wall part) facing the two-dot chain line 36 shown
It has a pressing means 35 integrally formed with the insulator 32 via 34. However, the lead portion 33 is approximately Z-shaped in side view, and the lower surface of the tip portion 33a that is soldered to a conductor pattern (not shown) corresponding to the conductor pattern 5 in FIG. It's on the same side.

When this connector 31 is placed at a predetermined position on a wiring board and a pressing force P ₄ is applied to the pressing means 35 having a substantially L-shaped cross section, the pressing means 35 rotates downward about the thin wall portion 34 as a rotation axis. The lower end surface of the pressing means 35 presses almost directly above the bent portion 33b of the lead portion 33, and presses the lower surface of the tip portion 33a of the lead portion 33 against the conductor pattern provided on the wiring board. In this state, the tip portion 33a is soldered to the conductor pattern, and the work of connecting the connector 31 to the wiring board is completed.

In FIG. 3, a connector 41 has a plurality of lead terminals implanted in two rows in the thickness direction of the paper on an insulator 42, and the lead portions 4 of the lead terminals are approximately Z-shaped.
3 are configured to face each other,
The insulator 42 has a pressing means 45 formed integrally with the insulator 42 via a V-shaped cross-sectional groove (thin wall portion) 44 and facing the lead portion 43 . However, the spacing between the pair of opposing lead parts 43 is such that when the connecting part of the wiring board 10 is inserted between the facing parts as shown in the figure, the conductor pattern 9 of the wiring board 10 and the lead part 43 do not come into contact or are slightly It is designed to make contact.

In this connector 41, when the connecting portion of the wiring board 10 is inserted between the opposing lead portions 43 and a pressing force _P5 is applied to press the pressing means 45 inward, the pressing means 45 having a wedge-shaped cross section presses the lead portion 43. Press the bent corner portion 43b and press the tip portion 4 of each lead portion 43.
3a contacts the conductive pattern 9. In this state, the tip portion 43a is soldered to the conductor pattern 9, and the work of connecting the connector 41 to the wiring board 10 is completed.

[Effect of idea]

As explained above, according to the present invention, the insulator is provided with a pressing means for pressing the middle part of the lead part, and each lead part is configured to come into contact with its connecting conductor pattern by the pressing means. Even if the lead part has a variation in shape, it can be brought into contact with the conductor pattern with a relatively light force, and when the lead part is mounted on a wiring board or the wiring board is inserted, the lead part generates spring pressure to contact the conductor pattern. Since the pressing means comes into contact with and presses the lead part, there is an effect that the opposing conductor patterns can be soldered without damaging the lead part and the conductor pattern and without causing the lead part to shift laterally.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a connector according to a basic configuration example of the present invention and a method for mounting it on a wiring board, FIG. 2 is a perspective view of a connector according to an embodiment of the present invention, and FIG.
The figure is a side view of a connector according to another embodiment of the present invention, Figure 4 is an explanatory diagram of a connector with a conventional configuration and a method for mounting it on a wiring board, and Figure 5 is a connector with another conventional configuration and its wiring. FIG. 6 is an explanatory diagram of the method of inserting the connector into the board, and FIG. 6 is a diagram illustrating the disadvantages of the connector of FIG. 5. In the figure, 4 and 10 are wiring boards, 5 and 9 are conductor patterns, 21, 31, and 41 are connectors, and 2
2, 32, and 42 are insulators, 23, 33, and 43 are lead portions, and 25, 35, and 45 are pressing means.

Claims (1)

[Claims for Utility Model Registration] (1) A lead terminal is provided with a lead portion 23 that is soldered to the conductor pattern 5 of the wiring board 4, and a plurality of lead terminals are planted in parallel so that the lead portion 23 is led out. A connector characterized in that the provided insulator 22 is provided with a pressing means 25 for pressing an intermediate portion of the lead portion 23 toward the conductor pattern 5. (2) The connector according to claim 1, wherein the pressing means 25 is formed integrally with the insulator 22 via the thin wall portion 24.