JP3278573B2 - Lock structure of connector for printed wiring board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock structure for a connector for a printed wiring board for temporarily fixing the connector to the printed wiring board.

[0002]

2. Description of the Related Art As a lock structure for temporarily fixing a connector to a printed wiring board, for example, as shown in FIG. 6, a printed wiring board 5 is attached to an end of an insulating housing 1 forming a connector body.
The guide boss 2 to be inserted into the through hole 6 is integrally formed, and the locking claw 3 is protruded from the outside of the guide boss 2.

[0003]

However, in the conventional lock structure described above, when the guide boss 2 is inserted into the through hole 6, the locking claw 3 comes into contact with the peripheral edge of the through hole 6, and is indicated by a virtual line. However, since a load is applied to bend the guide boss 2 from the root portion 2a, there is a problem that the insertion force is large. In addition, there is a problem that the locking claw 3 is shaved at the edge of the through hole 6 and the locking function is reduced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lock structure of a connector for a printed wiring board in which an insertion force can be significantly reduced and a reliable lock function can be obtained.

[0005]

According to the present invention, a guide boss inserted into a through hole of a printed wiring board is integrally formed at an end of an insulating housing in which a large number of contacts are housed at a distance. In the molded printed wiring board connector, the guide boss has a cylindrical shape and has an outer portion.
A cavity extending in the longitudinal direction parallel to the axis .
Ri, said bent from the lower end of the guide boss upward, extends along the cavity portion, and an elongated displaceable within said cavity portion
And a locking claw projecting outward in the radial direction by the guide boss is provided at an upper end of the elastic locking piece.

[0006]

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

FIG. 1 shows a printed wiring board connector 10 having a lock structure according to the present invention. In an insulating housing 11 forming a connector body, a large number of contacts 12 (see FIG. 2) are separated from each other. And the lead portions 12a of the respective contacts 12 are accommodated in two rows.
Project downward from the bottom of the insulating housing 11.
A cylindrical guide boss 13 is integrally formed at both ends of the bottom of the insulating housing 11. The guide boss 13
Is a cavity portion 14 extending in the longitudinal direction parallel to the axis A on the outer portion.
And an elongated elastic lock piece 15 that is bent upward from the lower end thereof and extends along the cavity 14. The elastic locking piece 15 has a lateral width smaller than the width of the cavity 14, is elastically deformable and can be displaced into the cavity 14, and protrudes radially outward of the guide boss 13 at the upper end. A locking claw 16 is provided. As shown in FIG. 2, the elastic locking piece 15 extends obliquely upward and outward with respect to the axis A of the guide boss 13, and the outer portion projects outward from the diameter of the guide boss 13. There is.

FIGS. 3 and 4 show an assembling process for mounting the connector 10 having the above-described configuration on the printed wiring board 5. FIG. While positioning both guide bosses 13 and 13 by inserting them into through holes 6 provided at predetermined positions of printed wiring board 5,
The leads 12 a of the respective contacts 12 are inserted into the corresponding individual mounting holes 7 and mounted on the printed wiring board 5. As shown in FIG. 3, the guide lock boss 13 inserted into the through-hole 6 gradually elastically deforms inward during the insertion, and is displaced backward into the cavity 14. At this time, since the locking claw 16 is also displaced toward the cavity 14 together with the elastic locking piece 15, even if the locking claw 16 abuts on the peripheral edge of the through hole 6,
It moves smoothly downward while being displaced inward without receiving large resistance. Therefore, the insertion resistance is very small, and the guide boss 13 has a small
Plugged in. Then, as shown in FIG. 4, when the guide boss 13 is completely inserted into the through hole 6, the elastic locking piece 15 penetrates the through hole 6 and returns to the original position by the elastic restoring force. Abuts on the back surface of the printed wiring board 5 to be locked.
Is held and fixed. In this way, the connector 10 is transported to the reflow process while being temporarily fixed to the printed wiring board 5,
The lead portion 12a of each contact 12 is printed wiring board 5
It is soldered to.

Further, in the lock structure of the present invention described above,
Since the elastic locking piece 15 is bent upward from the lower end of the guide boss 13, the locking claw 16 can be easily provided at a predetermined position even if the guide boss 13 is lengthened. Therefore, as shown in FIG. 5, in the case where the plurality of connectors 22 mounted on the sub-board 21 are fitted and connected to the plurality of connectors 10 mounted on the main board 20 to connect the two boards 20 and 21, Guide boss 13 of connector 10
If the length L is set to a length that abuts against and is supported by the surface of the chassis 23 on which the main board 20 is set, the deflection of the main board 20 can be effectively prevented when the sub-board 21 is mounted. A reliable mating connection is obtained.

[0010]

As described above, according to the present invention,
When the guide boss is inserted into the through hole of the printed wiring board ,
The lock piece is gradually elastically deformed and displaced backward into the cavity
Therefore, the insertion force of the guide boss into the through hole can be significantly reduced. Moreover, the locking claws provided on the elastic lock piece, as well as through the hole smoothly without being cut contact with the periphery of the hole, securely engage the back surface of the printed wiring board Therefore, it has an excellent lock function. Further, the elastic lock piece is located in the space.
Because it can be displaced, it can be damaged by external force
Absent.

[Brief description of the drawings]

FIG. 1 is a perspective view of a connector for a printed wiring board having a lock structure according to the present invention.

FIG. 2 is a partially cutaway front view of a main part of the connector.

FIG. 3 is a partially cutaway front view of a main part showing the connector being mounted on a printed wiring board;

FIG. 4 is a partially cutaway front view of a main part showing a completed state of mounting the connector on a printed wiring board.

FIG. 5 is an explanatory diagram showing another example of use of the connector.

FIG. 6 is an explanatory view showing a conventional example of a lock structure.

[Explanation of symbols]

 Reference Signs List 5 printed wiring board 6 through-hole 10 printed wiring board connector 11 insulating housing 12 contact 12a lead portion 13 guide boss 14 vacant portion 15 elastic lock piece 16 locking claw

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 12/04 H01R 12/22 H01R 13/506

Claims (3)

(57) [Claims] The end portion of claim 1. A dielectric housing a large number of contacts are housed at a distance, in the printed circuit board connector guide boss inserted into a through hole of the printed wiring board are integrally formed, the guide boss circle columnar, and space portions in the outer portion extending parallel to the axis in the longitudinal direction is provided, wherein bent from the lower end of the guide boss upward, extends along the cavity portion, and in said cavity portion displaceable elongated bullet <br/> of the lock piece is provided, said the upper end of the elastic lock piece
A locking structure for a connector for a printed wiring board, comprising a locking claw protruding radially outward from a guide boss . 2. The printed wiring board connector according to claim 1, wherein said elastic locking piece extends obliquely upward and outward with respect to an axis of said guide boss, and an outer portion thereof protrudes outward from a diameter of said guide boss. Lock structure. 3. The printed wiring board according to claim 1, wherein the guide boss has a length such that when inserted into the through hole of the printed wiring board, a lower end portion thereof comes into contact with a chassis on which the printed wiring board is mounted. Lock structure for printed wiring board connectors.