JP3073423U - PCB mounting structure - Google Patents

Abstract

(57) Abstract: Provided is a printed circuit board mounting structure for reducing a wiring prohibited area set on a printed circuit board and facilitating wiring design. A printed circuit board mounting structure for mounting a printed circuit board (1) to a housing (7), wherein both ends in the longitudinal direction of the printed circuit board (1) face through holes formed in a central part in a width direction. , A U-shaped head 5a having a groove slightly wider than the thickness of the printed circuit board 1, and a screw 5 substantially perpendicular to the outer surface thereof.
b is fixed, and a plurality of holders 5 are fitted at predetermined intervals to an end surface of the printed circuit board 1 in the width direction,
The printed board 1 is fixed to the housing 7 via the six columns, and the holder 5 is fixed to the housing 7 via the screws.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a printed circuit board mounting structure for mounting a printed circuit board on a housing.

[0002]

[Prior art]

 The printed circuit board serving as the motherboard for the telephone exchange has not only a large area but also a high-density wiring with a maximum of nine interstitial wirings formed of, for example, a 24-layer multilayer substrate.

In such a printed circuit board, as shown in FIG. 6, a plurality of through holes 2 are formed in the printed circuit board 1, and a reinforcing plate (not shown) is formed in the printed circuit board 1 by using the through holes 2. ) Is attached, and the printed circuit board 1 is screwed and fixed to a housing (not shown).

[0004]

[Problems to be solved by the invention]

 For this reason, as shown in FIG. 7, for example, a 10 mm square wiring prohibited area 3 is set around the through hole 2 having a diameter of 4 mm. It is bent. Since the wiring prohibited area is set in all the layers of the printed circuit board 1, the wiring 4 must be bent and arranged in all the layers, and the arrangement of the wiring 4 becomes difficult. Will be needed.

Further, in the case of the wiring 4 arranged along the outer peripheral portion of the printed circuit board like the power supply wiring, the arrangement becomes difficult, and the number of layers of the printed circuit board is reduced only for the arrangement of the wiring 4. May be increased.

In view of the above circumstances, an object of the present invention is to provide a printed circuit board mounting structure for reducing a wiring prohibited area set on the printed circuit board and facilitating wiring design.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, according to the present invention, there is provided a printed circuit board mounting structure for mounting the printed circuit board on a housing, wherein the printed circuit board has both ends in a longitudinal direction and a center part in a width direction. A pair of columns arranged so as to face the through holes formed in the head, a U-shaped head having a groove slightly wider than the thickness of the printed circuit board, and a screw fixed substantially perpendicularly to the outer surface of the head. A plurality of holders are fitted at predetermined intervals to the end surface in the width direction of the printed circuit board, and the printed circuit board is fixed to the housing via the support posts, and the holder is connected to the housing via the screws. Fixed to the housing.

[0008]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 to 5 show an embodiment of the present invention. FIG. 1 is a perspective view of a holder used in the present invention, and FIG. 2 is a side view and a view showing an attached state of a printed circuit board. 3 is a front view showing an attached state of the printed board, FIG. 4 is an enlarged view showing a wiring state of an inner layer of the printed board, and FIG. 5 is an enlarged view showing a wiring state of an outermost layer of the printed board.

In FIG. 1, reference numeral 5 denotes a holder, a U-shaped head 5 a having a groove having an opening slightly wider than the thickness of the printed circuit board, and substantially perpendicular to the outer surface of the head 5 a. And a fixed screw 5b.

As shown in FIG. 2 and FIG. 3, a plurality of holders are mounted at both ends in the width direction of the printed circuit board 1 at predetermined intervals by using such a holder 5, and through the both ends in the longitudinal direction. The printed circuit board 1 is fixed to the housing 7 through the support posts 6 by passing the screws 8 through the through holes, and a nut (not shown) is screwed into the screw 5 b of the holder 5 to fix the holder 5 to the housing 7. Set.

With such a structure, it is possible to eliminate through holes on both sides in the width direction of the printed circuit board 1. Therefore, as shown in FIG. Therefore, only the region at the peripheral portion of the print substrate 1 which is set regardless of the presence or absence of the through hole is provided, and the wiring 4 can be arranged straight.

In the outermost layer of the printed circuit board 1, as shown in FIG. 5, a wiring prohibited area 3 is generated in a portion where the holder 5 is mounted, but the outermost layer of the printed circuit board 1 has a smaller wiring than the inner layer. Since the density is low, there is no particular problem in wiring design.

Therefore, the wiring prohibited area in the inner layer of the printed circuit board 1 can be reduced, and the wiring capacity of the inner layer can be improved, so that the wiring design can be facilitated and the study time can be reduced by about 10%.

[0015]

[Effect of the invention]

 As described above, according to the present invention, there is provided a mounting structure for a printed circuit board for mounting the printed circuit board on a housing, which is formed at both ends in the longitudinal direction of the printed circuit board and at the center in the width direction. A pair of columns disposed so as to face the through holes, a U-shaped head having a groove slightly wider than the thickness of the printed circuit board, and a screw fixed substantially perpendicularly to the outer surface of the head. Are provided, a plurality of holders are fitted at predetermined intervals to the end surface in the width direction of the printed circuit board, and the printed circuit board is fixed to the housing via the support posts, and the holder is attached to the housing via the screw. Since the wiring is fixed, the wiring prohibited area set on the printed circuit board can be reduced, and the wiring design can be facilitated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a holder used in the present invention.

FIG. 2 is a side view showing a mounting state of the printed circuit board according to the present invention.

FIG. 3 is an exemplary front view showing an attached state of the printed circuit board in FIG. 3;

FIG. 4 is an enlarged view showing a wiring state of an inner layer of the lint substrate.

FIG. 5 is an enlarged view showing a wiring state of an outermost layer of the printed circuit board.

FIG. 6 is a plan view showing the shape of a conventional printed circuit board.

FIG. 7 is an enlarged view showing a fixing portion of a conventional printed circuit board.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Printed circuit board, 2 ... Through-hole, 3 ... Wiring prohibited area, 4
Wiring, 5: Holder, 5a: Head, 5b: Screw, 6: Prop, 7: Housing, 8: Screw.

Claims (2)

[Utility model registration claims] 1. A printed circuit board mounting structure for mounting a printed circuit board on a housing, wherein both ends in a longitudinal direction of the printed circuit board are opposed to through holes formed in a central portion in a width direction. A pair of columns arranged, a U-shaped head having a groove slightly wider than the thickness of the printed circuit board, and a holder having a screw fixed substantially vertically to an outer surface thereof are provided, and the width of the printed circuit board is provided. A plurality of holders are fitted at predetermined intervals to the end face in the direction, and the printed circuit board is fixed to the housing via the support posts, and the holder is fixed to the housing via the screws. Printed circuit board mounting structure. 2. The printed circuit board mounting structure according to claim 1, wherein an elastic material is disposed in a groove in the head of the holder, and the printed circuit board is supported via the elastic material. .