JPH09167895A - Circuit board containing structure with protective cover for electric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin electric apparatus by a structure wherein electronic devices are mounted on one side of each of a set of adjacent circuit boards and applied with protective covers having corresponding protrusions and recesses. SOLUTION: Adjacent circuit boards P1, P2 are mounted, on one side with electronic devices and the rear side serves as a soldering surface. The surface mounting electronic devices is applied with insulating resin protective covers C1, C2 provided with protrusions and recesses. The protrusions and recesses are formed to fit each other when the circuit boards P1, P2 are combined while taking account of the arrangement of electronic devices to be mounted thereon previously at the stage of design. This structure facilitate the assembling work while reducing the overall size and thickness of electric apparatus.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board accommodating structure with a protective cover for an electric device applied to a monitor TV set in a dwelling unit.

[0002]

2. Description of the Related Art Conventionally, many electric devices having a structure in which a plurality of circuit boards are housed have been developed. As one of the electric devices of this type, there is a monitor TV that is installed inside the dwelling unit and displays the appearance of the visitor and the outside scenery with a TV camera installed at the entrance or the like. Since the circuit board is accommodated, a shield is provided to prevent the electronic components mounted on the circuit board from being affected by noise, etc., and a protective cover is provided to prevent the electronic components mounted on each circuit board from touching each other. I am.

[0003]

However, in the above conventional electric equipment, the protective cover and the shield are formed on a part of the circuit board according to the height of the electronic component to be protected and the electronic component to be shielded. Since the circuit boards are mounted in a chaotic manner, when the circuit boards are accommodated adjacently, a wasteful space is generated, the thickness of the entire electric device increases, and the size increases.

The present invention has been made in view of the above-mentioned problems of the prior art, in which a concavo-convex portion is formed on a protective cover in correspondence with the height of an electronic component mounted on a circuit board. It is an object of the present invention to provide a circuit board accommodating structure with a protective cover for an electric device in which the electric device accommodating these circuit boards can be thinned by combining the above.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been proposed to achieve the above object, and the circuit board accommodating structure with a protective cover for an electric device according to claim 1 comprises at least one set. This is a housing structure in which circuit boards are housed adjacent to each other in an electrical device. Each of a pair of adjacent circuit boards has an electronic component mounted on one side of each circuit board to protect these electronic components. Without a cover structure,
This protective cover is characterized by forming corresponding concave and convex portions.

According to a second aspect of the present invention, there is provided a circuit board accommodating structure with a protective cover for an electric device according to the first aspect, wherein one of the pair of circuit boards has a power source mounted thereon, and the other has power supplied from the power source. It has a structure in which a control unit for receiving the signal is mounted, and a connector is provided on both circuit boards and is connected by a cable. The circuit board on which the power supply unit is mounted is housed on the bottom side of the base, and the circuit board on which the control unit is mounted is placed on this. Accordingly, the control unit and the power supply unit can be arranged above and below, and the wiring of the power supply unit can be shortened.

According to a third aspect of the present invention, there is provided a circuit board accommodating structure with a protective cover for an electric device according to the first or second aspect, wherein the protective cover forms a convex portion corresponding to a height of an electronic component mounted on the circuit board. It is made of insulating resin. According to a fourth aspect of the present invention, in the circuit board housing structure with a protective cover for an electric device, the protective cover is made of a transparent insulating resin. This allows the electronic components mounted on the circuit board to be seen through from the outside.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an example of a circuit board housing structure with a protective cover of an electric device.
Here, a set of circuit boards constituting a monitor television is shown, which has a power supply section, a circuit board P1 accommodated below (bottom) of a base (described later), and a circuit board having a control section. P2 and P2 are combined so as to be adjacent to each other.

Each of the circuit boards P1 and P2 has an electronic component mounted on one surface, and the back surface thereof is a soldering surface, and the surface on which the electronic component is mounted is made of an insulating resin and has an uneven portion. The protective covers C1 and C2 are covered. The concavo-convex portions of the protective covers C1 and C2 fit into each other when the circuit boards P1 and P2 are combined in consideration of the arrangement of electronic components to be mounted on the circuit boards P1 and P2 in advance from the design stage. Since it is formed as described above, it is possible to reduce the thickness of the entire electric device (monitor TV) having this structure.

In the figure, the circuit board P2 shows the surface provided with the protective cover C2, but when housed in an electric device, it is turned upside down so as to face the circuit board P1, and the same hatch patterns are connected by straight lines. The parts are combined so that they overlap each other. Further, the circuit board P1 is mounted with a power supply section, the circuit board P2 is mounted with a control section which receives power supply from the power supply section, and both circuit boards P1 and P2 are connectors ab, a'-b '. (Female type-male type), they are connected to each other by a cable c.

In the figure, t is a plurality of connection terminals provided on the circuit board P1 on which the power supply unit is mounted.
Thus, by mounting on the circuit board P1 housed in the bottom of the base, it is easy to connect and disconnect the external wiring introduced through the through hole (not shown) of the base, and the wiring inside the device is also refreshed. . Next, mounting examples of electronic components on the respective circuit boards P1 and P2 and protective covers C1 and C
2 shows an example.

FIG. 2 shows a configuration example (a) of an electronic component for the circuit board P1 and its protective cover C1 (b), and FIG. 3 shows a configuration example (a) of an electronic component for the circuit board P2 and its protective cover. C1 (b) is shown. Here, FIG.
3A shows an example in which a power supply unit including a capacitor Co, a transformer T (step-down), etc. is mounted, and FIG. 3A shows an example in which a control unit including electronic components such as a semiconductor chip is mounted. Is shown.

As shown in these figures, the protective cover C
1 and C2 have convex portions formed in necessary portions so as to correspond to the heights of various electronic components such as integrated circuits, transistors and capacitors mounted on the circuit boards P1 and P2. The convex portion is fitted into the concave portion of the other protective cover C1, C2. The protective covers C1 and C2 are made of an insulating resin so that electronic components mounted on the circuit boards P1 and P2 do not touch each other and are not affected by noise or the like. This protective cover C1, C
2 can also be made transparent. According to this, the configuration of the electronic components mounted on the circuit boards P1 and P2 can be easily known from the outside.

Next, an exploded view of FIG. 4 shows a structure of a monitor television as an example of an electric device accommodating the circuit boards P1 and P2. In the figure, 10 is a base, 11 is a frame, 12 is a television unit, 13 is another control circuit board, 14 is a monitor switch 14a and a monitor screen frame 1
4b is a main body cover having.

In such a structure, the circuit boards P1 and P
2 are connected to each other by a cable c, and the concavo-convex portions of both protective covers C1 and C2 are combined, and this set of circuit boards P1 and P2 is sandwiched between the base 10 and the frame 11 and accommodated in them. It This monitor television displays an image on the television unit 12 by operating the monitor switch 14a.

[0016]

As described above, according to the circuit board accommodating structure with the protective cover of the electric device according to the first aspect of the present invention, it is possible to adjust the height of the electronic parts arranged at appropriate positions on the circuit board. Then, since the concavo-convex portion is formed on the protective cover covered with these circuit boards so that the combined circuit boards are engaged with each other, if the respective concave and convex portions are fitted, the assembling becomes easy. , Miniaturization of the entire electrical equipment,
The thickness can be reduced.

According to the circuit board accommodating structure with the protective cover of the electric device according to the second aspect, the circuit board on which the power source section is mounted and the circuit board on which the control section which receives power from the power source section are mounted are provided. Since they can be housed in the electric device so as to be adjacent to each other so as to be fitted therein, the cable connecting both circuit boards can be shortened. According to the circuit board accommodating structure with a protective cover of an electric device according to claims 3 and 4, since the protective cover is made of an insulating resin, the mounting surface is not dusty and is mounted on the circuit board. The electronic components are not directly opposed to each other and do not come into contact with each other. Moreover, the influence of noise or the like can be reduced.

In particular, according to the fourth aspect, since the protective cover is made of the transparent insulating resin, the electronic component mounted on the circuit board can be seen through from the outside. Therefore, it is possible to save the trouble of opening the protective cover in order to know the configuration of the circuit board.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a circuit board accommodating structure with a protective cover of an electric device according to the present invention.

FIG. 2A is a diagram showing an example of mounting electronic components on a circuit board, and FIG. 2B is a diagram showing an example of a protective cover corresponding to the circuit board of FIG.

3A is a diagram showing an example of mounting electronic components on a circuit board combined with the circuit board of FIG. 2, and FIG. 3B is an example of a protective cover corresponding to the circuit board of FIG. It is a figure.

FIG. 4 is an exploded view showing an example of a monitor television having a circuit board housing structure according to the present invention.

[Explanation of symbols]

 P1, P2 ... Circuit board C1, C2 ... Protective cover a, b, a ', b' ... Connector c ... Cable

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Yokota 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Inoue Tatsuo, 1048, Kadoma, Kadoma City, Osaka Matsushita Electric Works, Ltd.

Claims (4)

[Claims] 1. An accommodating structure for accommodating at least one set of circuit boards adjacent to each other in an electric device, wherein each of the adjacent set of circuit boards has an electronic component mounted on one side thereof. A protective cover for protecting these electronic parts is covered, and the protective cover has corresponding concave and convex portions. 2. A power supply unit is mounted on one of the pair of circuit boards, and a control unit receiving power from the power supply unit is mounted on the other of the pair of circuit boards. The circuit board accommodating structure with a protective cover for an electric device according to claim 1, wherein the connector is provided and connected by a cable. 3. The protection of an electric device according to claim 1, wherein the protective cover is made of an insulating resin having a convex portion corresponding to the height of an electronic component mounted on a circuit board. Circuit board housing structure with cover. 4. The circuit board accommodating structure with a protective cover for an electric device according to claim 1, wherein the protective cover is made of a transparent insulating resin.