JPH0310630Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is an electronic component that prevents electronic components such as ICs, LSIs, relays, and connectors that are attached to sockets attached to printed circuit boards from falling out of sockets. This relates to a stopper.

(Prior Art) Conventionally, for example, in a control panel of a ship or the like where large vibrations and shocks occur, simply mounting electronic components in a socket attached to a printed circuit board may cause the electronic components to be removed from the socket due to vibrations or shocks. There is a problem with it falling off.

For this reason, for example, Japanese Utility Model Publication No. 59-15431 proposes a stopper for electronic parts.

This is shown in FIG. In the figure, 10 is a printed circuit board having pin holes 10a, 20 is a stopper made of synthetic resin, and legs 22 are on both sides of the base 21.
22, and locking claw portions 23, 24 are provided on the inner surface of the intermediate portion and the tip portion. 31 is a socket having a lead pin 34 on the lower surface and a terminal hole 33 on the upper surface. 35 has the terminal hole 33 on the bottom surface.
37 is a cable.

The socket 31 is connected to the printed circuit board 1.
After inserting the lead pin 34 into the pin hole 10a of 0 and soldering it, the connector 35 is inserted into the socket 31.
Attach to. Then, the legs 22, 2 of the stopper 10 are
2 is inserted from below into the insertion hole 10b provided in the printed circuit board 10, and the locking claw portion 23 is locked in the stepped portion 32 of the socket 31, and the locking claw portion 24 is locked in the upper surface of the connector 35.

That is, the connector 35 is crimped onto the printed circuit board 10 by the locking claws 24, and is prevented from falling off due to vibrations, shocks, etc.

(Problem to be solved by the invention) However, with the above-mentioned conventional device, not only is it necessary to provide an insertion hole in the printed circuit board for inserting the leg of the removal stopper, but also it is necessary to prevent removal due to the height of the electronic component. You need to prepare the ingredients.

In addition, when replacing the retainer, the retainer is inserted from the back side of the printed circuit board, so the printed circuit board must be removed, making the work of replacing the retainer cumbersome.

The present invention was developed to solve the above problems, and it is possible to prevent the electronic components from coming off by simply mounting them from above without performing any special processing on the printed circuit board. To provide a versatile electronic component removal stopper that can be easily attached and detached and can be applied even if there is a slight difference in height.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the electronic component removal stopper according to the present invention has an elastic gate-like shape consisting of a top wall and both side walls, and the opposite side walls A locking claw portion is formed on the inner edge of the lower end to lock the bottom surface of the base of the socket attached to the printed circuit board, and
A notch is provided across the upper part of the top wall and the side wall to form at least one elastic piece made of a part of the top wall and the side wall, and the tip of the elastic piece is provided with a cutout for the electronic component mounted in the socket. A pressing part for pressing the top surface is formed, and a fitting piece part is formed inside the corner part of the top wall and both side walls or the corner part of the elastic piece part to be located between the lead pins of the electronic component.

(Embodiment) FIG. 1 shows a perspective view of a retainer 1 according to the present invention, an electronic component 11 consisting of a dual in-line package type IC, and a socket 14.

The socket 14 has a lead pin 16 inserted into a pin hole 10a provided in the printed circuit board 10 described below at the lower end, and an electronic component 11 at the upper surface.
It has a connection terminal hole 15 into which a lead pin 12 is inserted. Note that 13 is a glass window provided in the electronic component 11.

The pull-out stopper 1 is made of synthetic resin and has an elastic roughly gate-like shape, and is composed of an upper wall 2 and both side walls 3, 3, and its width is approximately equal to the width of the socket 14. The tip is quite narrow.

By providing a notch 4 across the upper part of the upper wall 2 and the side walls 3, 3, a pair of elastic pieces 5, which are made up of a part of the upper wall 2 and the side walls 3, 3, are formed.
5 are formed to face each other. Each elastic piece 5 has a pressing portion 6 made of a curved surface on the inner side of the tip.

Further, a locking claw portion 7 is provided on the inner edges of the opposing lower ends of the side walls 3, 3, and a fitting piece portion 8 is provided on the inner corner portion of the elastic piece portion 5.

Next, how to use the retainer 1 having the above structure will be explained with reference to FIGS. 2 to 4.

First, the lead pin 16 is inserted into the pin hole 10a of the printed circuit board 10, and the wiring is fixed to the socket 14 by soldering as appropriate. Then, after inserting the lead pin 12 of the electronic component 11 into the connection terminal hole 15 of the socket 14, the stopper 1 may be pressed so as to cover the electronic component 11.

That is, the side walls 3, 3 of the removal stopper 1 are slightly opened by the pressing operation, and the locking claws 7 of the stopper 1 lock with the lower surface of the base of the socket 14, and the pressing portion 6 of the elastic piece 5 opens the electronic component 11. This will press the top surface.

Therefore, the electronic component 11 is prevented from slipping out of the socket 14 by the elastic piece 5 of the pull-out stopper 1 whose lower end is locked to the lower surface of the base of the socket 14, and the pull-out stopper 1 is prevented from slipping out from the fitting piece. 8 is located between the lead pins 12, so it will not slide in the longitudinal direction and fall off. Furthermore, in this embodiment, since the fitting piece 8 is provided inside the elastic piece 5, the base of the elastic piece 5 is reinforced and the pressing force is increased.

Moreover, since the stopper 1 can be easily removed by opening the side walls 3, 3, the stopper 1 can be easily attached and removed, or the electronic component 11 can be replaced easily.

The elastic piece 5 of this retainer 1 is formed by a portion of the top wall 2 and side walls 3, 3 by providing a notch 4 across the top of the top wall 2 and side walls 3, 3. It is easy to mold with a mold and can be molded to a certain extent in the longitudinal direction. Therefore, even a long electronic component can be fixed with one stopper.

The retainer 1 is not limited to synthetic resin and may be made of a metal plate, but in this case, at least the fitting piece 8 must be made of synthetic resin to prevent short circuits between the lead pins 12.

In the above embodiment, two elastic pieces 5 are provided in the center of the retainer 1 so as to face each other from both sides, but it is also possible to provide one elastic piece 5 in the center as shown in FIG. 5, or as shown in FIG. Alternatively, two sets may be provided on both sides. In the above embodiment, the elastic piece 5 is provided extending from the side wall 3 to the top wall 2, but it may be formed by deforming the top wall 2.

Note that even if the fitting piece 8 is not provided inside the elastic piece 5 but is provided at the inner corner of the side wall 3 and top wall 2 as shown in FIG. 6, the slide of the stopper 1 can be prevented. Needless to say, both side walls are reinforced.

Further, the pressing part 6 of the elastic piece part 5 does not necessarily have to be a curved surface, but if it is a curved surface, if characters are printed on the surface of the electronic component 11, the characters will be printed when the retainer 1 is attached. It is possible to prevent the glass window 13 from being scratched off and being damaged.

(Effects of the Invention) As is clear from the above explanation, according to the removal stopper of the present invention, the printed circuit board is inexpensive because there is no hole for attaching the removal stopper to the printed circuit board. Furthermore, since the retainer is attached from above the electronic component, it is easy to attach and detach, and since the upper surface of the electronic component is pressed by the elastic piece, it can be applied to electronic components within a predetermined height range, and has versatility.

In addition, the pull-out stopper of the present invention has a portal shape, and the upper wall and part of the side wall form an elastic piece, so it is easy to mold, and it can be molded to a certain length in the longitudinal direction. Only one piece needs to be used for fixing electronic components, making it easy to mount electronic components onto printed circuit boards.

Furthermore, the presence of the mating piece prevents the retainer from falling off in the longitudinal direction of the electronic component, completely preventing the retainer from falling off due to vibration or impact, and the elastic piece and both sides This has the effect of reinforcing the base of the wall.

[Scope of Claim for Utility Model Registration] (1) It has an elastic portal shape consisting of a top wall and both side walls, and is fixed to the lower inner edge of the lower end of the opposite side walls to the lower surface of the base of the socket attached to the printed circuit board. At the same time, a notch is provided across the upper part of the top wall and the side wall to form at least one elastic piece made of a part of the top wall and a part of the side wall, and at the tip of the elastic piece. , forming a pressing part that presses the top surface of the electronic component installed in the socket, and further forming a pressure part between the lead pins of the electronic component inside the corner of the top wall and both side walls or the corner of the elastic piece. A retainer for electronic components, characterized by forming a fitting piece located at . (2) The electronic component removal stopper as set forth in claim 1 of the utility model registration claim, wherein at least the fitting piece of the removal stopper is made of synthetic resin. (3) The electronic component removal stopper according to claim 1 or 2, wherein the pressing portion of the elastic piece with the electronic component is a curved surface.

[Brief explanation of the drawing]

FIG. 1 shows an electronic component removal stopper according to the present invention.
Perspective view of electronic components and socket, Figure 2 is the same as Figure 1.
Figure 3 is a plan view of Figure 2, Figure 4 is its front view, Figures 5 and 6 are the second and third parts of the retainer. FIG. 7 is an exploded perspective view showing a conventional example. 1, 1a, 1b... Removal stopper, 2... Top wall, 3
...Side wall, 5...Elastic piece part, 6...Press part, 7...
... Locking claw part, 8 ... Fitting piece part, 10 ... Printed circuit board, 11 ... Electronic component, 14 ... Socket, 1
2...Lead pin.