JPH0124957Y2 - - Google Patents

Description

[Detailed description of the invention] This invention allows easy maintenance and inspection of printed wiring boards and electronic components attached to them, which are attached to the housing or box-shaped panel of small electronic devices such as pagers. This invention relates to improvements to printed circuit board mounting devices.

As shown in FIG. 1, the conventional printed wiring board mounting device inserts the printed circuit board 2 deeply into the groove 1a between the protrusions of the bottomed box-shaped panel 1, and then attaches the printed circuit board 2 to the holes 1b, 1b in the two protrusions of the panel. After matching the holes 2a and 2a in the two places on the printed circuit board, insert two special mounting pins 3 and 3 into the respective places using a special tool, and then fit the case 4 to the panel 1. When the screw 5 is inserted from the outside of the case,
It was constructed so that the printed circuit board 2 and the panel 1 were integrated by being tightened to the tap plate 6 on the printed circuit board. However, since the mounting pins 3, 3 require a special tool to remove them, it is necessary to remove the mounting pins 3 with a special tool in order to maintain or inspect parts mounted in the hidden parts of the panel 1. Furthermore, there was a problem in that a gap was created between the panel 1 and the printed circuit board 2 due to mounting tolerances, and another part was required to fix the printed circuit board to the panel.

In addition, maintenance and inspection of components mounted on parts hidden inside the panel 1, or components mounted on multiple printed circuit boards stacked on top of each other, parts hidden on printed circuit boards located above. In order to facilitate maintenance and inspection, a structure in which a panel, one printed circuit board, and one printed circuit board can rotate relative to each other around one axis is published, for example, in Japanese Utility Model Publication No. 48-44226. Something like this has been proposed.

However, although this is convenient for maintenance and inspection of parts, it still has the drawback that the panel and the printed circuit board or the printed circuit boards cannot be fixed to each other.

The present invention eliminates the above-mentioned drawbacks and has a structure that not only facilitates maintenance and inspection of all components mounted on the printed circuit board, but also allows easy fixing of the panel or housing and the printed circuit board to each other. A printed circuit board mounting device is provided.

FIG. 2 is an exploded perspective view showing the first embodiment.

Both ends of the bottom plate 11a of the box-shaped panel or casing 11 are perpendicular to the bottom plate 11a, and the tips thereof protrude beyond the side plates 11b and 11c of the panel or casing, and holes 13 are provided in the protruding portions. A plurality of protrusions 14, 25, 27 are provided. Grooves 14a and 25 are provided near both side edges of the printed circuit board 17 between the protrusions.
When inserted into hole 1 of the protrusion, respectively.
Holes 21 and 22 are provided at positions corresponding to holes 3 and 36. To attach the printed circuit board 17 to the panel or housing 11, place the printed circuit board 17 in the groove 1.
4a, 25a, and hole 1 of protrusion 14 on one side.
3 and the mounting pin 1 in the hole 21 of the printed circuit board 17.
2 is inserted so that the printed circuit board 17 can be freely rotated. Groove 24 of protrusion 25 on the other side
A flat tap plate 28 having a screw hole 26 is inserted into the tap plate 28, a screw 29 is inserted through the projections 25, 27 and the hole 22 of the printed circuit board 17, and is screwed into the screw hole 26 of the tap plate 28 and tightened.

The printed circuit board 17 is rotatably attached to a mounting part of a panel or a housing on one side, and is tightened on the other side with a screw hole in a tap plate using a removable screw. Since the screws can be removed and the printed circuit board can be rotated and taken out of the panel, there is no need to remove the printed circuit board for inspection or repair, making work extremely easy.

Furthermore, since the tap plate 28 is designed to be inserted into the groove 24, it is possible to prevent the tap plate from rotating when positioning the tap plate and attaching/detaching screws.

FIG. 3 shows a second embodiment in which, instead of the tap plate 28 described above, a horizontal portion of a tap plate 31 having a rising portion 30 bent at 90° is inserted into a groove portion 34 between protrusions 32 and 33. The printed circuit board 17 is inserted into the groove 34a between the projections 33 and 35, and the screw 29 is inserted into the hole of the projection 35, the hole 22 of the printed circuit board,
Through the hole 36 of the protrusion 33, the hole 31 of the tap plate 31 is inserted.
a, and by tightening the screws 29, the printed circuit board 17 and each protrusion are fixed to each other. The rising portion 30 of the tap plate 31 and the side surface of the protrusion 32 engage with each other to facilitate positioning of the tap plate 31 and prevent rotation of the tap plate.

As explained above, in the printed circuit board mounting device of this invention, the panel and the printed circuit board are mounted using mounting pins on only one side so that the printed circuit board can rotate relative to the panel, and on the other side, the printed circuit board is mounted on the panel using mounting pins. Sandwich the printed circuit board between the protrusions provided on the
Since it is tightened with screws, there is no looseness between the panel and the printed circuit board, and the tap plate into which the screw is screwed is temporarily fixed to the protrusion of the panel and does not rotate when the screw is tightened. This, combined with the fact that the printed circuit board is taken out to the outside of the panel, makes the installation process easier and more reliable (if the tap board falls in a narrow place, it takes a considerable amount of time to pick it up), and it also makes it easier to remove the screws. The printed circuit board can be rotated relative to the panel by simply loosening and removing it, making maintenance and inspection of the mounted components extremely easy.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a conventional printed circuit board mounting device, and FIGS. 2 and 3 are perspective views showing one embodiment and other embodiments of the printed circuit board mounting device of this invention. 1, 11... Panel, 1a... Groove, 2, 17...
...Printed circuit board, 2a, 13, 21, 22, 26
...Hole, 3,12...Mounting pin, 4...Case,
14, 25, 27, 32, 33, 35...Protrusion,
19, 20...Electronic parts, 24, 34, 34a...
...Groove portion, 28, 31...Tap plate, 29...Screw, 30...Rising portion.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a device for attaching a printed circuit board to a mounting portion of a box-shaped panel or housing, a bottom plate 1 is attached to each end of a bottom plate 11a of a panel or housing 11.
A plurality of protrusions 14, 2 which are perpendicular to 1a and whose tips protrude beyond the side plates 11b, 11c of the panel or casing, and which are provided with holes 13, 36.
5, 27 or 14, 32, 33, 35 are provided, and the printed circuit board 17 is placed near both side edges of the printed circuit board 17 in the grooves 14a, 25a between the protrusions.
Alternatively, holes 21 and 22 are provided at positions corresponding to the holes 13 and 36 of the protrusion when the printed circuit board 17 is inserted into the groove 14a and 34a, respectively.
4a, 25a or 14a, 34a,
The mounting pin 12 is inserted into the hole 13 of the protrusion 14 on one side and the hole 21 of the printed circuit board 17, and is rotatably attached to the printed circuit board 17 and the panel or housing 11, and the protrusion 25 or 32, 33 on the other side is attached.
Insert the tap plates 28, 31 with screw holes 26, 31a into the grooves 24, 34 of the tap plates 28, 31, and insert the screws 29 through the protrusions 25, 27, 33, 35 and the holes 22 of the printed circuit board. A printed circuit board mounting device characterized by screwing and tightening into holes 26 and 31a. (2) The printed circuit board mounting device according to claim 1, wherein the tap plate 28 is a flat plate that is fitted and held in a groove 24 formed in one of the protrusions 25. (3) The tap plate has a key-shaped cross section consisting of a horizontal part and a rising part 30, and the horizontal part has a protrusion 3.
2, 33, and the rising portion 30 engages with a side surface of one of the protrusions 32. The printed circuit board mounting device according to claim 1, which is a registered utility model.