JPH025574Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printed circuit board fixing device, and particularly to a printed circuit board fixing device for fixing a printed circuit board to a housing.

2. Description of the Related Art Conventional printed circuit board fixing devices of this type include those shown in FIGS. 1 to 4, for example. That is, 1 is a metal housing having a through hole 3 in a side wall 2 for locking a support member to be described later;
3 shows a supporting member made of elastic synthetic resin, and as shown in FIG. A second bent piece 6b is disposed slightly inside the bent piece 6a, facing the first bent piece 6a, and the first bent piece 6a and the second bent piece 6b are opposed to each other. Engagement protrusion 6 on the opposite surface of the tip
The first bent piece 6a and the second bent piece 6b form an engaging part 7 having a U-shaped cross section, and a flat plate part on the opposite side of the engaging part 7. It has a structure in which a fitting protrusion 9 with a groove 8 recessed in the center of the protrusion 5 protrudes. Therefore, the engaging portions 7 formed on the upper and lower sides of the support member 4 are inserted into the printed circuit board 10, and the engaging protrusions 6c of the engaging portions 7 are inserted into the length formed on the edge of the printed circuit board 10. By engaging with the holes 11, the two printed circuit boards 10 are fixed vertically in parallel by the support member 4. Support members 4 are attached to the edges of the upper and lower printed circuit boards 10.
These printed circuit boards 10 are placed into the housing 1 in a fixed state, and then the fitting protrusions 9 of the support member 4 are inserted.
The printed circuit board 10 is fixed in the housing 1 by pushing down the support member 4 so as to align it with the through hole 3 of the housing 1 and engaging the fitting protrusion 9 with the through hole 3.

In addition, when taking out the printed circuit board 10 from inside the housing 1, the tip of a nail or the like is engaged with the groove 8 of the fitting protrusion 9 of the support member 4 from outside the housing 1, and the nail is inserted into the housing 1. The fitting protrusion 9 can be pushed out from the through hole 3 by pushing the support member 4 upwardly.

However, in such a conventional printed circuit board fixing device, the fitting protrusion 9 of the support member 4
The shape of the through hole 3 drilled in the housing 1 into which the printed circuit board 10 is fitted is formed into a circular shape that is approximately the same as the shape of the fitting protrusion 9. If the accommodation position of the support member 4 supporting the printed circuit board 10 deviates from a predetermined position, the fitting protrusion 9 and the through hole 3 may become misaligned as shown in FIG. In this case, in order to correct this and fix the printed circuit board 10 in the housing 1, there is a problem in that it requires time-consuming work such as taking the printed circuit board 10 out of the housing 1 again and putting it back in. Ta.

The present invention was developed by focusing on such conventional problems, and by providing a notch in a continuous manner in the through hole of the casing into which the fitting protrusion of the support member is fitted,
If a misalignment occurs between the through hole and the mating protrusion,
It is an object of the present invention to provide a printed circuit board fixing device that can easily engage the fitting protrusion into the through hole by inserting a rod through the notch and guiding the fitting protrusion into the through hole.

The present invention will be explained below based on the embodiments shown in FIGS. 5 to 8.

Note that the drawings showing this embodiment show the parts that are different from the conventional printed circuit board fixing device shown in FIGS. 1 to 4. Also, the first
The same reference numerals are given to the members having the same structure as the conventional printed circuit board fixing device shown in FIGS.
The explanation will be omitted.

Embodiment 1 In FIGS. 5 and 6, reference numeral 12 indicates notches provided on the left and right sides of the through hole 3 bored in the side wall 2 of the housing 1 so as to be continuous with the through hole 3. It is formed so that a rod 13 such as a nail can be inserted through the notch 12. And this through hole 3
Due to the elastic force of the support member 4, the fitting protrusion 9 of the support member 4 is elastically fitted.

Therefore, when fixing the printed circuit board 10 in the housing 1, if a misalignment occurs between the fitting protrusion 9 of the support member 4 and the through hole 3 of the housing 1, as shown in FIG. As shown in FIG. 6, a rod 13 is inserted into the notch 12 connected to the through hole 3, and the support member 4 is pushed toward the through hole 3 by the rod 13, so that the support member 4 is fitted. The protrusion 9 can be fitted into the through hole 3.

As described above, according to this embodiment, the notch is provided in the through hole drilled in the side wall of the casing so as to be continuous with the through hole, so that the supporting member can be pushed down into the casing and the supporting member When fitting the mating protrusion into the through hole of the housing and fixing the printed circuit board to the housing, even if there is a misalignment between the mating protrusion and the through hole, insert the rod into this notch. By moving the support member, the fitting protrusion can be fitted into the through hole, and the printed circuit board can be quickly and easily fixed to the housing.

Embodiment 2 In FIGS. 7 and 8, reference numeral 14 indicates a guide protrusion that is provided inside the side wall 2 of the housing 1 and protrudes along the vertical direction, and whose upper part is open toward the side end of the side wall 2. This guide protrusion 14 is provided above a notch 12 that is cut out so as to be continuous with the through hole 3 formed in the side wall 2.

Therefore, when the support member 4 supporting the printed circuit board 10 is aligned with the predetermined position of the housing 1 and the support member 4 is pushed down, the fitting protrusion 9 of the support member 4
is guided by the guide protrusion 14 and easily positioned in the through hole 3 bored in the side wall 2 of the housing 1. Furthermore, even if a positional shift occurs between the fitting protrusion 9 and the through hole 3,
Since the fitting protrusion 9 is guided by the guide protrusion 14 provided above the notch 12, the through hole 3 and the fitting protrusion 9
The rod 13 is not far away from the notch 1.
The fitting protrusion 9 can be fitted into the through hole 3 by easily moving the supporting member 4 while inserting the fitting protrusion 9 into the through hole 3.

As described above, according to this embodiment, the guide protrusion 1
4, in addition to the effects of the above-described embodiments, the fitting protrusion can be easily guided to the through hole, making it possible to easily and quickly attach the printed circuit board to the housing. effective.

As explained above, the present invention provides a support member 4 made of resin, which has an engaging portion 7 that engages with the edge of the printed circuit board 10 housed in the housing 1, using the engaging portion 7. A through hole 3 is provided in the side wall of the housing 1, a protrusion 9 that fits into the through hole 3 is integrally provided on the support member 4, and the protrusion 9 is fitted into the through hole 3. A printed circuit board fixing device for fixing a printed circuit board 10 in the casing 1, characterized in that a notch 12 connected to the through hole 3 is provided in the side wall of the casing 1. Since it is a fixing device, when fixing the printed circuit board inside the housing, there is a possibility that misalignment may occur between the through hole drilled in the side wall of the housing and the fitting protrusion of the support member attached to the printed circuit board. Also, by inserting a rod into this notch and moving the support member, it becomes possible to fit the fitting protrusion into the through hole, thereby quickly and easily fixing the printed circuit board to the housing via the support member. It has the effect of being able to.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional printed circuit board fixing device, Fig. 2 is an exploded perspective view of Fig. 1, and Fig. 3 is a perspective view of a conventional printed circuit board fixing device.
FIG. 4 is a side view showing the assembled state of the printed circuit board fixing device shown in FIG. 1, and FIG. 5 is an exploded perspective view of the main parts of the figure. FIG. Partially cutaway side view showing main parts, No. 6
The figure is a perspective view showing the installation and adjustment of the fixing device shown in FIG. 5, FIG. 7 is a cross-sectional view taken along the - line in FIG. 7. 12... Notch, 13... Rod, 14... Guide protrusion.

Claims (1)

[Scope of utility model registration request] A support member 4 made of resin having an engaging part 7 that engages with the edge of the printed circuit board 10 housed in the housing 1 is fixed by the engaging part 7, and the side wall of the housing 1 is A through hole 3 is provided in the support member 4, and a protrusion 9 that fits into the through hole 3 is provided integrally with the support member 4. The printed circuit board 10 is inserted into the housing 1 by fitting the protrusion 9 into the through hole 3. A device for fixing a printed circuit board, characterized in that a side wall of the housing 1 is provided with a notch 12 connected to the through hole 3.