JPH0669668A - System for mounting parts on printed wiring board - Google Patents

Abstract

PURPOSE:To reduce the size of a device constituted of a plurality of printed wiring boards to nearly the same size of the printed wiring boards and, at the same time, to improve the vibrationproof property of the device. CONSTITUTION:Frames 4 having heights decided by taking the parts mounted on printed wiring boards 1 into account, thicknesses decided by paying attention to radiation, and outer frames of nearly the same sizes as the external sizes of the boards 1 and the boards 1 are alternately pile up and the plurality of boards 1 are respectively put between a top and bottom covers 2 and 3 together with the frames 4, with vibration-proof collars 6 being respectively put between the boards 1, and the covers 2 and 3, boards 2, and frames 4 are fixed to each other with through bolts 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed wiring board mounting method, and more particularly to a printed wiring board mounting method in an electronic device that is required to be compact and resistant to vibration.

[0002]

2. Description of the Related Art An example of a conventional printed wiring board mounting system of this type is shown in FIGS. In the system shown in FIG. 2, the plurality of printed wiring boards 1 are connected to the top cover 1 from above via the collar 6.
2. It is sandwiched by the bottom cover 13 from below and fixed by the through bolt 5. The plurality of fixed printed wiring boards 1 are surrounded by side covers 8 which are attached from the side by screws 7.

In the system shown in FIG. 3, the printed wiring board 1 is also used.
Is attached to the side frame 9 divided in advance by screws 7, and the plurality of side frames 9 to which the printed wiring board 1 is attached are sandwiched by the topper cover 2 from above and the bottom cover 3 from below via the collar 6. Through bolt 5
Fixed by. This method is called slice structure,
This is a system in which the side cover 8 shown in FIG. 2 is divided into side frames 9 and the printed wiring board 1 is mounted in the side frames 9.

[0004]

The conventional printed wiring board mounting method described above basically has a structure in which a case is provided on the outside of the printed wiring board. The device had become larger. The printed wiring board is only fixed at points with screws or through bolts, so it is weak against vibration and potting using foam etc. is performed for the purpose of vibration damping in order to improve vibration resistance. However, in recent years, it has become necessary to adopt a printed wiring board mounting method that does not use a foam material or the like because of the problem of outgas repairability. Further, in terms of workability as well, there is a problem in that it takes time and labor because a plurality of printed wiring boards are fixed in advance with screws or through bolts and then assembled into a case.

[0005]

The printed wiring board mounting method of the present invention considers the height and radiation in consideration of a plurality of printed wiring boards to be mounted and mounting components mounted on these printed wiring boards. A plurality of frames having a thickness and an outer frame having substantially the same dimensions as the outer shape of the printed wiring board, and the printed wiring boards and the frames are alternately superposed and fixed by a fastening member. The printed wiring board is fixed on the entire surface of the frame, and the printed wiring board itself is also a part of the case of the apparatus.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing a printed wiring board mounting method according to an embodiment of the present invention.

In this embodiment, a plurality of printed wiring boards 1, a top cover 2, a bottom cover 3 and a plurality of frames 4 are main constituent elements, and the printed wiring board 1 itself is a part of the case. Specifically, the frame 4 has a height considering the mounting components mounted on the printed wiring board 1 and a thickness considering radiation, and has an outer frame having substantially the same size as the outer shape of the printed wiring board 1. , This multiple frames 4
And a plurality of printed wiring boards 1 are alternately superposed, and the plurality of printed wiring boards 1 are sandwiched by a top cover 2 from the top and a bottom cover 3 from the bottom and fixed by through bolts 5. That is, the printed wiring board 1 is fixed on the entire surface of the frame 4. In addition, when the printed wiring board 1 becomes large and the amplitude of the central portion during vibration increases,
It is also possible to adopt a system in which the collar 6 as a damping material is mounted between the printed wiring boards 1 and the printed wiring boards 1 are fixed by the through bolts 5.

[0008]

As described above, the present invention has a frame having a height in consideration of mounting parts of a printed wiring board and a thickness in consideration of radiation and having an outer frame having substantially the same size as the outer shape of the printed wiring board. By alternately superposing the printed wiring board and the printed wiring board, not only can the size of the device be reduced to approximately the same as the external dimensions of the printed wiring board, but also by fixing the printed wiring board on the entire surface of the frame. It is also effective in terms of vibration resistance. As a result, it is not necessary to fix the printed wiring board with foam material, etc., and only the parts need to be fixed with the coating agent, which reduces the work items when assembling the device and improves the work efficiency. Have.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a printed wiring board mounting method according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an example of a conventional printed wiring board mounting method.

FIG. 3 is an exploded perspective view showing another example of a conventional printed wiring board mounting method.

[Explanation of symbols]

 1 Printed wiring board 2, 12 Top cover 3, 13 Bottom cover 4 Frame 5 Through bolt 6 Color 7 Screw 8 Side cover 9 Side frame

Claims (2)

[Claims] 1. A plurality of printed wiring boards to be mounted and a height in consideration of mounting components mounted on these printed wiring boards and a thickness in consideration of radiation, and having substantially the same outer shape as that of the printed wiring board. A plurality of frames having an outer frame of a size, and the printed wiring board and the frame are alternately superposed and fixed with a fastening member to fix the printed wiring board on the entire surface of the frame, and A printed wiring board mounting method characterized in that the printed wiring board itself is also configured as part of the case of the device. 2. The printed wiring board mounting method according to claim 1, wherein a vibration damping member is provided between the printed wiring boards.