JPH0440309Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a printed circuit board mounting device for equipment.

(b) Conventional technology Conventionally, for example, in audio equipment such as car stereos, the main printed circuit board is attached to the bottom plate side of the equipment along the board surface with screws, etc., and the main printed circuit board is attached to the front panel side that is combined with this bottom plate. A sub-printed circuit board on which various electronic components operated by each operating knob were mounted was attached with screws, and both printed circuit boards were electrically connected with lead wires.

(c) Problems that the invention aims to solve As described above, in the conventional printed circuit board mounting device, the main printed circuit board and the sub printed circuit board are electrically connected using lead wires, so it is difficult to assemble the device or repair it. During disassembly, etc., connecting the lead wires and processing the wiring required time and effort, resulting in poor workability. Therefore,
As shown in Japanese Utility Model Application Publication No. 55-159581, the protruding end of the secondary printed circuit board is inserted into the through hole of the main printed circuit board and soldered, so that the secondary printed circuit board can be placed directly on the main printed circuit board. Some are configured to be mounted vertically. However, in such a configuration, the secondary printed circuit board is positioned on the main printed circuit board side, so a positional shift occurs between the secondary printed circuit board and the front panel, and the operation knobs protruding from the front panel side. There was a risk that a misalignment would occur in the correspondence between the child and the electronic components disposed on the sub-printed board side. In particular, in cases where a variable resistor for volume adjustment, etc. is installed on the sub-printed board side, and a rotation control knob is placed on the front panel side, even a slight positional deviation can prevent the axis from shifting. Then there was a problem where the two could not be connected.

(d) Means for solving the problem In order to solve the above-mentioned problems, the present invention has a sub-printed circuit board mounted on the main printed circuit board so as to be perpendicular to the surface of the board, and this main printed circuit board attached to the front panel. A printed circuit board mounting device for a device in which the device is attached to the bottom plate side of the device to be combined along the board surface, and a cut-and-raised piece is formed on the bottom plate side so as to be perpendicular to the board surface. A protruding piece with a part of the board surface thereof protruding is formed on the sub printed board side, and the cut piece and the protruding piece are inserted into the main printed board side so as to intersect with each other from opposite directions. A cross-shaped through hole is formed therein, and cut grooves are formed at the intersections of the cut and raised pieces and the protruding pieces to fit together.

(e) Operation According to the printed circuit board mounting device of the present invention having the above-mentioned configuration, the main printed circuit board and the sub-printed circuit board are positioned independently by the cut-out pieces formed on the bottom plate side, so that the sub-printed circuit board and the front panel, which require a corresponding relationship, can be mounted using the bottom plate as a common base.

(F) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

That is, numerals 1 and 2 in the figure are a front panel and a bottom plate that constitute the car stereo main body 3, and the front panel 1 is directly assembled to the metal bottom plate 2 and fixed with screws. Reference numeral 4 denotes a main printed circuit board that is attached to the bottom plate 2 side along the board surface, and the main printed circuit board 4 is equipped with various electronic components that constitute the main circuits of the car stereo.
A cross-shaped through hole 5 is formed in the closer portion. Reference numeral 6 denotes a sub-printed board mounted on the main printed board 4 so as to be perpendicular to the board surface thereof. Rotatably operated variable resistors 10 to 12 and the like are disposed therein, and a protruding piece 6a that is fitted into one of the rectangular holes 5a of the through hole 5 from above is formed to protrude. and,
A cut groove 6b is formed in the protruding piece 6a at a portion intersecting with the other rectangular hole 5b of the through hole 5 (that is, at a portion intersecting with a cut and raised piece to be described later). 2
a is a cut and raised piece cut and raised on the side of the bottom plate 2 so as to be perpendicular to the plate surface, and inserted into the other long rectangular hole 5b of the through hole 5 from below on the opposite side to the protruding piece 6a; A cut groove 2b is formed on the cut and raised piece 2a at the intersection with the protruding piece 6a so as to engage with the cut groove 6b, and it can be bent after being fitted into the other long rectangular hole 5b to be removed. A tongue-like piece 2c is formed to prevent this. Incidentally, L's 13 and 14 are attached to both sides of the protruding piece 6a of the sub printed board 6 so as to span between the sub printed board 6 and the main printed board 4.
The electrical and mechanical connections between the two boards 4 and 6 are made using the figure-shaped plugs.

Therefore, to assemble the circuit board mounting device of the present invention, first, as shown in FIG.
The protruding piece 6a of the attached sub-printed board 6 of No. 4
is inserted into one of the rectangular holes 5a of the through holes 5 of the main printed circuit board 4 from above, and the sub printed circuit board 6 is vertically erected on the main printed circuit board 4.
At this time, the connection terminal 13 of the L-shaped plug 13, 14
a, 14a are also inserted into the connection hole 15 of the main printed circuit board 4. With the sub-printed circuit board 6 erected in this manner, insert the pseudo cut piece formed on the bottom plate 2 and the pseudo-assembly jig into the other rectangular hole of the through-hole 5 of the main printed circuit board 4. 5b from below (that is, in the opposite direction to the protruding piece 6a), and the pseudo cut groove is inserted into the protruding piece 6 of the sub-printed circuit board 6.
Combine it with the cut groove 6b of a. At this time, the main printed circuit board 4 is positioned in the same way as with respect to the bottom plate 2 by the combination of the other long rectangular hole 5b and the pseudo cut piece, and the sub printed circuit board 6 is positioned by its protruding piece 6a.
The same positioning as with respect to the bottom plate 2 is achieved by the combination of the cut groove 6b and the cut groove of the pseudo cut and raised piece. Then, in this state, the L-shaped plug 13 inserted into the connection hole 15 of the main printed circuit board 4,
The installation of both boards 4 and 6 is completed by soldering the 14 connection terminals 13a and 14a to the main printed circuit board 4 side. Then, attach the combined board like this to the bottom plate 2.
When the other rectangular hole 5b of the through-hole 5 of the main printed circuit board 4 is inserted into the cut-and-raised piece 2a and placed from above, the cut-and-raised piece 2a's cut groove 2b
is also combined with the cut groove 6b of the protruding piece 6a of the sub-printed circuit board 6, and the two boards 4 and 6 are independently positioned with respect to the bottom plate 2, as previously positioned using the above-mentioned pseudo assembly jig. . At this time, the tongue-shaped piece 2c of the raised piece 2a projects above the main printed circuit board 4 through the rectangular hole 5b. Therefore, the main printed circuit board 4 is prevented from coming off from the bottom plate 2 by bending the tongue-like piece 2c in the direction of the arrow in FIG. The assembly is completed by combining and fixing them and fitting them into the adjustment shafts of the variable resistors 10, 11, 12 of the sub-printed board 6.

(g) Effects of the invention As mentioned above, according to the printed circuit board mounting device of the present invention, the main printed circuit board and the sub-printed circuit board that is mounted perpendicularly to the main printed circuit board are mounted on the cut and raised piece on the bottom plate side where the front panel is combined. Since the printed circuit board is positioned independently of each other, that is, the sub printed circuit board and the front panel, which require a corresponding relationship, can be mounted using the bottom plate as a common base, the operation knob protruding from the front panel side There is no risk of misalignment between the electronic components and the electronic components disposed on the sub-printed board side, and the board can be mounted with high precision.

[Brief explanation of the drawing]

Fig. 1 is an external view of a car stereo implementing the device of the present invention, Fig. 2 is a schematic perspective view showing how the main and sub-printed circuit boards are installed, Fig. 3 is an enlarged view of the main parts of Fig. 2, and Fig. 4 3 is a cross-sectional view taken along line AA' in FIG. 3, FIG. 5 is a cross-sectional view taken along line B-B' in FIG. 3, and FIG. 6 is an exploded perspective view thereof. 1...Front panel, 2...Bottom plate, 4...Main printed board, 6...Sub printed board.

Claims (1)

[Scope of utility model registration request] A device for mounting a printed circuit board for equipment, in which a sub printed circuit board is mounted on the main printed circuit board so as to be perpendicular to the board surface, and this main printed circuit board is mounted along the board surface to the bottom plate side of the equipment to which the front panel is assembled. A cut-and-raised piece is formed on the bottom plate side so as to be perpendicular to the plate surface, and a protruding piece that protrudes a part of the plate surface is formed on the sub-printed board side. , a cross-shaped through hole is formed on the main printed circuit board side, into which the cut-out piece and the protrusion piece are inserted so as to intersect with each other from both sides; A printed circuit board mounting device for equipment, characterized in that grooves are formed respectively.