JP3408420B2 - Circuit board layout - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit for operating a DC low voltage circuit such as an integrated circuit using a commercial power supply to form an electronic circuit for performing various signal processing. The present invention relates to an arrangement structure of a circuit board. 2. Description of the Related Art Today, integrated circuits called ICs are often used for processing various electric signals such as control signals and image signals. In general, an integrated circuit that performs this signal processing is operated by a low DC voltage of about 3 volts or 6 volts to about 12 volts. In addition to using a battery as a power source, an AC circuit in Japan is used. 1
In some cases, the voltage of a commercial power supply of 00 volts is stepped down and converted to direct current. According to safety standards, a primary circuit of a commercial power supply voltage of 100 VAC or the like and a secondary circuit of a DC low voltage combining circuit elements such as an integrated circuit are, for example, 4 mm in size. A space having a predetermined distance must be formed at least between the connection and circuit element of the primary circuit and the connection and circuit element of the secondary circuit. In the case where a spatial distance formed between each element or connection forming the primary circuit and each element or connection forming the secondary circuit is set smaller than a predetermined distance. In addition, an insulating plate called an insulator has to be inserted between the primary circuit and the secondary circuit. As described above, when circuit elements such as integrated circuits are used and elements forming a signal processing circuit are densely packed to reduce the size of a signal processing apparatus, for example, a commercial power supply is used. In order to reduce the size of the indoor monitoring camera as a device operated by the above, it is difficult to reduce the size of the signal processing device by forming a space that forms a predetermined gap between the primary side circuit and the secondary side circuit. May occur. A power supply circuit board having a primary side circuit;
When approaching a signal processing circuit board having a secondary circuit such as an integrated circuit, an insulating plate is inserted between the power supply circuit board and the signal processing circuit board to insulate the primary circuit and the secondary circuit. To ensure this, there is a disadvantage that the fixing of the insulating plate requires time and effort. In some cases, an insulating plate is adhered to the back surface of the signal processing circuit board using a double-sided adhesive tape, and the signal processing circuit board is arranged so as to be close to the power supply board. When fixing the insulating plate to the signal processing circuit board with the adhesive tape, it is necessary that the back surface of the signal processing circuit board is relatively flat and has little unevenness, so that the circuit element is mounted on the signal processing circuit board. There were drawbacks that were restricted by such factors. The present invention eliminates such conventional disadvantages, facilitates fixing of the insulating plate, and facilitates densely arranging circuit boards and circuit elements. [0008] The present invention provides a power supply circuit board which is a board provided with a primary side circuit, a first signal processing circuit board which is a board provided with a signal processing circuit, and a second signal processing board. The first signal processing circuit board is overlapped with the power supply circuit board so as to provide a gap, and a second signal processing circuit board is disposed between the first signal processing circuit board and the power supply circuit board.
Place the signal processing circuit board perpendicular to the power supply circuit board,
At least a part of one side is engaged with the power supply circuit board, and the other side opposite to the first signal processing circuit board is
An insulating plate having a folded portion inserted between the signal processing circuit board and the second signal processing circuit board is arranged substantially in parallel with the circuit board. As described above, the signal processing circuit board is formed so as to overlap the power supply circuit board with a gap formed therebetween, and the first signal processing circuit board and the power supply circuit board are stacked between the signal processing circuit board and the first signal processing circuit board. In order to arrange the second signal processing circuit board so as to be orthogonal to the signal processing circuit board and the power supply circuit board, the circuit elements to be mounted on each board are closely arranged while forming a gap between the plurality of boards, and are densely packed. It becomes possible easily. The second signal processing circuit board is disposed perpendicular to the power supply circuit board, at least a part of one side is engaged with the power supply circuit board, and the folded portion provided on the opposite side is formed by the first signal processing circuit board. Since the insulating plate inserted between the signal processing circuit board and the second signal processing circuit board is provided, the insulating plate substantially parallel to the second signal processing circuit board can be easily arranged and fixed, The position of the second signal processing circuit board may be set so as to shorten the distance between the circuit element of the secondary circuit attached to the second signal processing circuit board and the circuit element of the primary circuit attached to the power supply circuit board. it can. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a circuit board assembly structure according to the present invention, as shown in FIGS. 1 and 2, has one end of a power supply circuit board 11 on which elements constituting a power supply circuit are mounted. A second signal processing circuit board 25 is attached near the power circuit board 11 perpendicularly to the power circuit board 11, and further, on the upper end of the second signal processing circuit board 25, parallel to the power circuit board 11 so as to overlap the power circuit board 11. The first signal processing circuit board 21 described above is provided. On the first signal processing circuit board 21, a secondary circuit element 42 such as an integrated circuit for performing signal processing, a small resistor, a small capacitor, or the like is mounted. The secondary side circuit element 42 such as a small resistor or a dip switch is attached to the second signal processing circuit board 25.
Is provided with an insulating plate 31 inside. The signal processing circuit constituted by the secondary side circuit element 42 may be, for example, a video signal processing circuit for forming a color video signal from a CCD output signal.
11 and the first signal processing circuit board 21 are about 7 cm in length and about 4 cm in width, and the second signal processing circuit board 25 is about 6 cm in length and 3 cm in width. By using less than a meter, the circuit board can be assembled with a small indoor surveillance camera. As shown in FIG. 3, the power supply circuit board 11 is formed with two fixing holes 13 arranged linearly along one side of the power supply circuit board 11 and serves as a coupling means. An engagement hole 15 is formed inside the fixing hole 13 in parallel with the fixing hole 13. In the second signal processing circuit board 25, two insertion projections 27 are projected from one side, which is the lower side in FIG. 3, as coupling means. The insertion projections 27 are formed as two insertion projections 27 corresponding to the interval between the two fixing holes 13 formed in the power supply circuit board 11, and the thickness of each insertion projection 27 and each fixing projection The width of the hole 13 is made substantially the same,
Length of the power supply circuit board 11 and each insertion protrusion
The width of 27 is approximately equal to the length of each fixing hole 13. Accordingly, the second signal processing circuit board 25 can be vertically fixed to the power supply circuit board 11 by fitting the insertion protrusion 27 into the fixing hole 13. It should be noted that the number of the insertion protrusions 27 serving as the coupling means and the fixing holes 13 into which the insertion protrusions 27 are fitted are not limited to two. May be formed on the second signal processing circuit board 25 in some cases. Also, two insertion projections 27 are formed on the upper side of FIG. 3 of the second signal processing circuit board 25 as engagement means, and two insertion projections 27 fitted to the first signal processing circuit board 21 are formed. By forming the fixing hole 23 as an engaging means, an engaging means between the first signal processing circuit board 21 and the second signal processing circuit board 25 by the insertion projection 27 and the fixing hole 23 is formed. Further, an engagement recess 29 slightly recessed from the upper side is formed on the upper side of the second signal processing circuit board 25. An engagement protrusion 33 protruding from the lower side is provided on the rectangular flat insulating plate 31 having a thickness of about 0.5 mm.
And a tongue-shaped protruding portion is provided from the upper side which is the opposite side of the lower side, and this protruding portion is bent into a U-shape to form a folded portion 35. The height from the lower side of the insulating plate 31 to the upper end of the folded portion 35 is substantially equal to the height from the lower side of the second signal processing circuit board 25 to the engaging recess 29, and the lower side of the insulating plate 31 The engagement protrusion 33 formed on the power supply circuit board 11 is formed so as to have a position and a size that can be inserted into the engagement hole 15 of the power supply circuit board 11. And the size to cover. Therefore, after the insertion protrusion 27 of the second signal processing circuit board 25 is fitted into the fixing hole 13 of the power supply circuit board 11, the insulating plate
Insert the engagement protrusion 33 of the 31 into the engagement hole 15 of the power supply circuit board 11,
When the folded portion 35 of the insulating plate 31 is aligned with the engaging concave portion 29 of the second signal processing circuit board 25 and the tip 36 of the folded portion 35 is hung on the second signal processing circuit board 25, as shown in FIG. 31
Accordingly, the insulating plate 31 can be easily attached so as to cover most of one side surface of the second signal processing circuit board 25. The distance between the end 36 of the folded portion and the main body of the insulating plate 31 is adjusted by the insulating plate 31 in accordance with the state of the secondary circuit element 42 disposed inside the second signal processing circuit board 25. The signal processing circuit board 25 can be covered, and the engagement hole 15 provided in the power supply circuit board 11 is close to the primary circuit element 41 while the gap between the fixing hole 13 and the second signal processing circuit board 25 is
In accordance with the state of the secondary side circuit element 42 disposed inside. Then, the insertion protrusion 27 formed on the upper side of the second signal processing circuit board 25 is fixed to the fixing hole of the first signal processing circuit board 21.
When fitted to 23, as shown in FIGS. 1, 2 and 5,
The first signal processing circuit board 21 and the second signal processing circuit board 25 are integrated with the power supply circuit board 11, and the insulating plate 31 disposed close to the inside of the second signal processing circuit board 25 is fixed so as not to fall off. be able to. Accordingly, as shown in FIG. 2, the secondary side circuit element constituting the signal processing circuit is provided on the second signal processing circuit board 25.
When attaching the power supply circuit element constituting the primary side circuit to which the commercial power supply voltage is applied and input to the power supply circuit board 11 when attaching the power supply circuit element 41 and the secondary side circuit element 42 and the secondary circuit element 42, The distance between the side circuit element 42 and the terminal and the like can be reduced to about 1 to 2 millimeters, so that the insulating plate 31 can be easily attached and the circuit elements can be densely arranged. An arrangement combination can be used. The coupling means formed on the power supply circuit board 11 and the second signal processing circuit board 25, and the coupling means formed on the first signal processing circuit board 21 and the second signal processing circuit board 25,
Since the power supply circuit board 11 and the first signal processing circuit board 21 can be integrated with the second signal processing circuit board 25, it is possible to easily assemble an apparatus for processing a signal by incorporating this board. Since the thickness of the insulating plate 31 is as small as about 0.5 mm, the engaging recess 29 is formed in the second signal processing circuit board 25.
In some cases, the insulating plate 31 may be fixed by sandwiching the folded portion 35 between the first signal processing circuit board 21 and the end of the second signal processing circuit board 25 without forming the same. Further, the engaging protrusion 33 formed at the lower end of the insulating plate 31 is engaged with the engaging hole 15 of the power supply circuit board 11.
Not only when a part of the lower end of the insulating plate 31 is engaged with and fixed to the power supply circuit board 11,
And by inserting the lower side of the insulating plate 31 directly into the engaging groove 16 without forming the engaging projection 33 at the lower end of the insulating plate 31, the entire lower side of the insulating plate 31 is May be engaged. In addition to the case where the second signal processing circuit board 25 is fixed to the first signal processing circuit board 21 or the power supply circuit board 11 using the insertion projection 27, as shown in FIG. And the first signal processing circuit board 21 and the second signal processing circuit board 25 have screw holes for fixing each board to the case 51 or the like.
55, the power supply circuit board 11 and the first
The signal processing circuit board 21 and the second signal processing circuit board 25 are appropriately fixed to the case 51 and the chassis, and the power supply circuit board 11 and the second signal processing circuit board 25 fixed in the case 51.
Are fixed in a case 51 so that the second signal processing circuit board 25 and the first signal processing circuit board 21 are orthogonally contacted or brought close to each other, and the first signal processing circuit board Inserting the folded portion 35 of the insulating plate 31 between the 21 and the second signal processing circuit board 25 and fixing the insulating plate 31 by engaging at least a part of the lower end of the insulating plate 31 with the power supply circuit board 11 There is also. The present invention relates to a combination of a power supply circuit board and first and second signal processing circuit boards, wherein the first signal processing circuit board is parallel to the power supply circuit board and a gap is provided. Overlapping, arranging the second signal processing circuit board perpendicular to the power circuit board between the first signal processing circuit board and the power circuit board, at least a part of one side is engaged with the power circuit board,
In addition, an insulating plate having a folded portion inserted between the first signal processing circuit board and the second signal processing circuit board is provided on another opposite side, and the insulating plate is substantially the same as the second signal processing circuit board. This is an arrangement structure of circuit boards arranged in parallel. Therefore, it is easy to arrange and fix the insulating plate between the primary side circuit element and the secondary side circuit element, and to arrange the primary side circuit element and the secondary side circuit element close to each other. Can be easily performed. Therefore, there is an advantage that the size of the device incorporating the signal processing circuit operated by the commercial power supply can be easily reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an assembly structure of a circuit board according to the present invention. FIG. 2 is a side view of a circuit board assembly structure according to the present invention. FIG. 3 is an exploded perspective view of the circuit board assembly structure according to the present invention. FIG. 4 is a partially exploded view of a circuit board assembly structure according to the present invention. FIG. 5 is a front view of a circuit board assembly structure according to the present invention. FIG. 6 is an exploded perspective view showing another example of the circuit board assembly structure according to the present invention. FIG. 7 is an assembly view in another example of an assembly structure of a circuit board according to the present invention. DESCRIPTION OF SYMBOLS 11 power supply circuit board 13 fixing hole 15 engaging hole 16 engaging groove 21 first signal processing circuit board 23 fixing hole 25 second signal processing circuit board 27 insertion protrusion 29 engagement recess 31 insulating plate 33 engagement Projection 35 Folded part 36 Folded part tip 41 Primary circuit element 42 Secondary circuit element 51 Case 55 Screw hole

Continuation of front page (72) Inventor Takashi Kurosu 321 Shinjuku Nitta, Shinjuku, Showa-cho, Kitakatsushika-gun, Saitama Prefecture Rhythm Watch Industry Co., Ltd. Saitama Office (56) References JP-A 1-268097 (JP, A) JP-A Hei 6-252527 (JP, A) JP-A-62-263698 (JP, A) JP-A-60-207398 (JP, A) JP-A-58-1550884 (JP, U) JP-A-1-130588 (JP, A) U) U.S.A. 7-32990 (JP, U) U.S.A. 3-13784 (JP, U) U.S.A. 61-27394 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) ) H05K 7/14

Claims (1)

(57) Claims 1. A power supply circuit board which is a board provided with a primary side circuit, and a first signal processing circuit board and a second signal processing circuit board which are board provided with a signal processing circuit Wherein the first signal processing circuit board is overlapped with the power supply circuit board so as to be substantially parallel to the power supply circuit board, and the second signal processing circuit board is connected to the power supply circuit between the first signal processing circuit board and the power supply circuit board. It is arranged perpendicular to the circuit board, and at least a part of one side is engaged with the power supply circuit board, and the other opposing side has a first side.
An insulating plate having a folded portion inserted between the signal processing circuit board and the second signal processing circuit board is provided, and the insulating plate is disposed substantially parallel to the second signal processing circuit board. Arrangement structure of circuit board.