JP3090634B2 - Fixing structure of printed circuit board connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed board connector fixing structure used when mounting a connector on a printed board.

[0002]

2. Description of the Related Art Conventionally, as a fixing structure of a connector to a printed circuit board, for example, as shown in FIG. 9, a pair of left and right leg components 2 and 3 are separated from a lower end surface 1A of a connector housing 1 in parallel. When it is vertically installed, one leg component 3
The connector housing 1 is provided with legs 5 on both left and right ends thereof, each of which has a configuration in which a substantially hemispherical projection 4 is projected from the outer surface of the connector housing 1.

When the connector is mounted on the printed circuit board A via the two legs 5 and 5 provided on the connector housing 1, the leg components 2 and 3 are attached to the mounting holes B of the printed circuit board B from the ends thereof. 10, one leg component 3 mainly provided with the projection 4 is largely elastically deformed inward with its base 3A as a fulcrum, as shown by the dashed line in FIG. At the time of passing through the mounting hole B, the two leg constituent members 2 and 3 are restored to the state shown by the solid line in the same figure, and are fixed by engaging the base 4A of the projection 4 with the lower peripheral edge of the mounting hole B. You.

[0004]

The thickness t of each of the leg members 2 and 3 is very thin, usually 0.4 mm or less, and the tip of each of the leg members 2 and 3 is separated into two. With such a configuration, there is an advantage that the spring property in the left-right direction imparted to the leg 5 is soft, and the operation of inserting and removing the attachment hole B is easy.

[0005] However, while having such advantages, a large number of connector housings are collected in one place in a mixed state at the time of manufacturing the connector housing 1, but the tip ends of the two leg constituent members 2 and 3 of the leg 5 are respectively provided. Due to the separation, the other connector housing 1 and its two legs 5, 5 are entangled with each other at the separated distal end portion. As a result, troubles are likely to occur in the next process for sending the terminal to the automatic loading device for assembling the terminal into the connector housing 1, that is, in the automatic alignment / supply device.

Further, since the strength of the leg 5, that is, the leg constituent members 2 and 3 are structurally weak at the portions of the bases 2A and 3A, when the connector housing 1 is manufactured, terminals are assembled, transported, and the connector is mounted. At the time of mounting on the printed circuit board A or the like, the leg components 2 and 3 are easily broken at the bases 2A and 3A, and the occurrence rate of defective products increases. If the leg components 2 and 3 are mounted on the printed circuit board A without noticing that the leg components 2 and 3 are not broken, the leg 5 cannot secure the spring force required for holding and fixing the connector. The connector may fall off the printed circuit board A.

Further, since the leg 5 composed of the separate and independent two leg components 2 and 3 has a weak spring property, there is a variation in accuracy, and the base 4A of the projection 4 is engaged with the lower peripheral edge of the mounting hole B. If they are mounted in a state where they do not match, when soldering from the back side of the printed circuit board A, there is also a problem that the connector floats up from the mounting surface of the printed circuit board A and connection failure is likely to occur.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has a large structural strength of the legs and a moderately strong spring property. The purpose of the present invention is to provide a connector capable of securely fixing a connector to a printed circuit board even if there is some variation in dimensional accuracy. A pair of left and right leg constituent members are connected at their distal ends to form an integrated leg, and at least one of the leg constituent members has a printed circuit board attached to an outer surface thereof. A substantially hemispherical projection that engages with the hole, and a cutout recess that has a U-shape on the inner surface and whose apex is located substantially on the horizontal center line of the projection is provided on the inner surface, respectively. Printed circuit board connector A fixed structure.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
Is a connector, and the lower end face 1 of the connector housing 11 is
On both sides of 1A, a leg 1 having the following structure for inserting and fixing in a mounting hole B of a printed circuit board A on which it is mounted is provided.
2, 12 are provided respectively.

Reference numerals 13 and 14 denote leg constituent members of the leg 12,
The two leg constituent members 13 and 14 are connected to the connector housing 11.
Are spaced apart from the lower end surface 11A by a predetermined distance. Then, the two leg constituent members 13, 14
Are formed so that the outer surfaces thereof gradually become narrower from the center toward the distal end, and the two leg constituent members 13 and 14 are integrally connected at the distal end by a connecting portion 15.

Reference numeral 16 denotes a substantially hemispherical projection provided on the outer surface of the one leg constituent member 14, which protrudes at a substantially middle position of the leg constituent member 14, and an upper base portion of the protrusion 16. 16
The distance h from A to the lower end surface 11A of the connector housing 11 is set to be equal to or slightly longer than the thickness of the printed circuit board A. Reference numeral 17 denotes a notch-shaped notch recessed in a front view provided on the inner side surface of the one leg constituent member 14, and its top 17A is set to be located on a substantially horizontal diameter line of the protrusion 16.

Therefore, when the connector 10 is mounted on the printed circuit board A via the two legs 12, 12 provided on the connector housing 11, the legs 12 are inserted into the mounting holes B of the printed circuit board A from the tips 15 thereof. By pushing in, the one leg constituent member 14 provided with the protrusion 16 is moved from the state shown by the dashed line in FIG.
It elastically deforms inward with 4A and the vicinity of the tip 15 as fulcrums.

At this time, the protruding portion 16 is
Is pressed most strongly by the peripheral surface of the mounting hole B. However, since a notch-shaped notch 17 is formed on the inner surface of the leg component 14 where the projection 16 is provided, 4
(II) As shown by the one-dot chain line, the leg constituent member 14 at the portion where the projection 16 is provided is easily elastically deformed inward with a relatively weak force, and the leg 12 is in the state shown by the solid line in FIG. Is inserted into the mounting hole B of the printed circuit board A.

The protruding portion 16 is mounted on the printed circuit board A.
Through the mounting hole B, the two leg constituent members 13,
14 is restored to the state shown by the solid line in FIG. 4 (II), and the upper base 16A of the projection 16 is engaged with the lower peripheral edge of the mounting hole B, whereby the connector housing 1 is connected.
The printed circuit board A is fixed to the printed circuit board A via the two legs 12 provided on the printed circuit board 1.

Here, since the leg 12 has the above-described structure, its spring property is relatively soft and has an appropriate strength. Therefore, as shown in FIG. Even when the distance h from the upper base 16A of the protrusion 16 to the lower end surface 11A of the connector housing 11 is shorter than the thickness of the printed circuit board A, the leg 12 is held by the protrusion 16 in the mounting hole B. , Firmly fixed.

FIGS. 6 to 8 show another embodiment.
The difference from the above embodiment is that the notch recess 17 is provided on the inner surface of the other leg constituent member 13 of the leg 12 at a position facing the notch recess 17 provided on the inner surface of the one leg constituent member 14. The other configuration is the same as that of the above-described embodiment, except that a notch-shaped notch 18 of substantially the same shape as 17 is provided.

In the present invention, the leg component 1
3 is formed integrally with the side end of the connector housing 11, and the leg component 13 may have too strong a spring property. In such a case, a pair of left and right leg component members 13 is provided. , 14 is extended to a position above the lower end surface of the connector housing so that elastic deformation of the leg component 13 can be more easily caused. it can.

Therefore, when this connector is mounted on the printed circuit board A through the two legs 12, 12 provided on the connector housing 11, the legs 12 are inserted into the mounting holes B of the printed circuit board A from the tips 15 thereof. By pushing in,
As shown in (I), the two leg constituent members 13 and 14 are respectively
The bases 13A and 14A and the tip 15 are elastically deformed inward with the fulcrum as a fulcrum.

Then, as shown in FIG. 7 (II), the protrusion 16 passes through the mounting hole B and the two leg constituent members 13, 14
Is restored to the state shown by the solid line in the same figure, and the upper base 16A of the projection 16 is engaged with the lower peripheral edge of the mounting hole B, so that the connector 10 is connected to the two legs 12 provided on the connector housing 11. , 12 to the printed circuit board A. Alternatively, as shown in FIG. 8, the leg 12 is fixed in the mounting hole B at the protrusion 16 thereof.

[0020]

As described above, the fixing structure for a printed circuit board connector according to the present invention is such that a pair of left and right leg constituent members vertically spaced apart from the lower end surface of the connector housing are connected at their distal ends to be integrated. Forming the legs as a structure,
At least one of the leg constituent members of the leg has a substantially hemispherical protrusion on the outer surface thereof for engaging with the mounting hole of the printed circuit board, and the top of the leg has an indented shape on the inner surface. Since the notch recesses located on the horizontal center line of the projections are provided respectively, (1) the connector housings do not become entangled with the legs, and the connector housings are automatically aligned and automatically in the next process. Supply can be performed smoothly. (2) Since the structural strength of the legs is large, the occurrence rate of defective products due to breakage is low, and at the same time, it is possible to prevent the connector from falling off the printed circuit board due to the use of defective products and to prevent the connector from being lifted during soldering. . (3) Since the spring property is moderately large and soft, it is easy to attach and detach the connector, and the holding force of the printed circuit board in the mounting hole is strong. Therefore, even if the manufacturing accuracy varies, it can be securely fixed, and it can be prevented from floating from the printed circuit board of the connector at the time of soldering,
A stable connection can be expected. There are various effects.

[Brief description of the drawings]

FIG. 1 is a front view of a connector provided with a fixing structure according to the present invention.

FIG. 2 is an enlarged front view of the fixing structure.

FIG. 3 is a sectional view taken along line II-II of FIG. 2;

FIG. 4 is a longitudinal sectional view for explaining the operation.

FIG. 5 is a longitudinal sectional view illustrating the operation.

FIG. 6 is an enlarged front view of another embodiment.

FIG. 7 is a longitudinal sectional view illustrating the same operation.

FIG. 8 is a longitudinal sectional view illustrating the operation.

FIG. 9 is an enlarged front view of a conventional fixing structure.

FIG. 10 is a longitudinal sectional view illustrating the same operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Connector 11 Connector housing 11A Lower end surface 12 Leg 12A Separation part 12a Termination on the base side 13 Leg constituent member 14 Leg constituent member 14A Outer side surface 14B Inner side surface 15 Connection part 16 Projection part 16A Upper base part 16B Lower base part 17 Notch concave part 17A Top part 18 Notch recess

Claims (3)

(57) [Claims] 1. A pair of left and right leg constituent members vertically spaced apart from a lower end surface of a connector housing are connected at their distal ends to form an integrated leg, and at least one of said legs is formed. The leg component has a substantially hemispherical protrusion on its outer surface for engaging with the mounting hole of the printed circuit board, and an inwardly-curved shape on its inner surface, the top of which is approximately the horizontal center of the protrusion. A fixed structure for a connector for a printed circuit board, wherein a notch concave portion located on a line is provided. 2. A notch recess having substantially the same shape as the notch recess is provided on an inner surface of the other leg component of the leg so as to face a notch recess provided on the inner surface of the one leg component. The printed circuit board connector fixing structure according to claim 1, wherein: 3. A base formed integrally with the side end of the connector housing, the base of the other leg constituent member of the leg being separated from the other leg constituent member and the one leg constituent member. 3. The printed circuit board connector fixing structure according to claim 1, wherein the base end of the portion extends from a lower end surface of the connector housing to an upper position.