JP2592363Y2 - Circuit board short circuit prevention structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the prevention of short-circuiting of a circuit board, and more particularly to the prevention of short-circuiting of a terminal formed on a circuit board due to being wet.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 4 to 6, a flexible FPC board 3 is provided on an outer back surface 2 of a case housing 1 by press-fitting engagement with a pin 4 standing on the back surface 2 and arranged. I have. A conductive pattern 5 is formed on the FPC board 3, and is electrically connected to an electronic component (not shown) formed at an end of the conductive pattern 5 and housed in the case housing 1 via a screw 6 made of a conductive material. A plurality of terminal portions 7 to be connected are formed side by side in the vertical direction. The FPC board 3 is covered with an insulating film 8 for the purpose of protecting the conductive pattern 5 except for the terminal portion 7 and its vicinity.

[0003]

In the prior art described above, when used for a bath remote controller or the like, hot water or the like is applied to the case housing 1 and the FPC board 3 so that they are not covered with the insulating film 8 and are arranged vertically. Water flows from the top to the bottom between the terminal portions 7, and the terminals 7 are electrically connected to each other, thereby destroying electronic components and circuits (not shown) housed in the case housing 1. There was a problem.

[0004]

Therefore SUMMARY OF THE INVENTION The present invention is intended for the purpose of solving the above problems and has as its gist wall
Surface, and at least two or more vertically
In a circuit board provided with terminal portions located vertically, a hole portion is provided between the terminal portions , and a wall portion inserted into the hole portion is formed in the wall surface. wall portion formed on a wall, characterized in that is inclined with respect to the horizontal direction.

[0005]

The present invention prevents a short circuit between a plurality of terminals arranged in a substantially vertical direction when the terminal is wet.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to FIGS. 1 to 3. However, the same or corresponding parts as those of the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. 1 and 2 show a first embodiment of the present invention, wherein 1 is a case housing, and an FPC board 3 is disposed on an outer back surface 2 of the case housing 1, and a conductive pattern 5 is provided on the FPC board 3. A terminal portion 7 formed at an end of the conductive pattern 5 and electrically connected to an electronic component (not shown) via a screw 6 is formed in a vertical direction.
A plurality of them are formed vertically . In addition, this FPC board 3
Are covered with an insulating film 8 for the purpose of protecting the conductive pattern 5 except for the terminal portion 7 and its vicinity. Also, this FPC
The plate 3, Oh Ru to form a hole 9 extending transversely between aligned terminal portions 7 in the vertical direction. On the back surface 2 of the instrument case 1, a laterally extending wall portion 10 which is inserted and corresponds to the hole 9 is provided.
Nitrous Ru and vertically formed to the back 2. In order to prevent the short circuit between the terminal portions 7, this wall portion 10 causes the flow of water from above to flow downward, so that the upper wall portion 10 in FIG. It is inclined with respect to the horizontal direction on the up.

With the above structure, when water or the like is applied to the case housing 1, even if the water flows downward from above,
The presence of the wall portion 10 prevents water from being transmitted between the terminal portions 7 arranged vertically, and there is no short circuit between the terminal portions 7 due to water.

FIG. 3 shows a second embodiment, which comprises terminal portions 7 arranged in the vertical direction and terminal portions 7 located at a position slightly shifted to the right between them. A substantially human-shaped wall portion 10 is provided so as to allow escape. Also in this embodiment, a short circuit between the terminal portions 7 due to water flowing from above can be prevented.

Although the FPC board 3 is used as the circuit board 3 in the above embodiment, a hard printed board may be used. Further, the FPC board 3 is provided on the outer back surface 2 of the case housing 1, but is not limited to the case housing 1, as long as the circuit board 3 is provided on the wall surface 2. .

The terminal 7 is electrically connected to an electronic component or the like via the screw 6. However, the electrical connection of the terminal 7 is not limited to the screw 6, and is, for example, illustrated. However, any terminal unit 7 that is not covered with the insulating film 8 such as a terminal unit 7 for soldering or connecting a light bulb used for connection to the terminal unit 7 such as a jumper wire may be used.

The terminal 7 does not need to be provided only at the end of the conductive pattern 5, but may be provided at an intermediate position of the conductive pattern 5.

The terminal portions 7 do not need to be strictly arranged vertically, but also include the terminal portions 7 arranged in a vertical relationship which may be affected by water flowing from above as shown in FIG. Needless to say. In addition, there may be a distance between the terminal portions 7. In the above embodiment, the FPC
Although an interval is provided between the plate 3 and the case housing 1, there is no problem if the interval can be freely set as appropriate.

[0013]

According to the present invention, according to the above-described structure, the insulation property between the vertically arranged terminals when wet can be improved, malfunction of the circuit and electrolytic corrosion of the terminals can be prevented beforehand, and electronic components and circuits can be prevented. Destruction can be prevented. In addition, the provision of the wall serves as a positioning member when the circuit board is disposed in the case housing.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is a sectional view of the embodiment.

FIG. 3 is a front view of a second embodiment of the present invention.

FIG. 4 is a perspective view of a conventional example.

FIG. 5 is a front view of the conventional example.

FIG. 6 is a sectional view of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case housing 2 Wall surface (back surface) 3 Circuit board (FPC board) 5 Conductive pattern 6 Screw 7 Terminal part 9 Hole part 10 Wall part

Claims (2)

(57) [Scope of request for utility model registration] 1. A method according to claim 1, further comprising the step of:
Circuit board with terminals located vertically above and below
A short circuit prevention structure for a circuit board, wherein a hole is provided between the terminal portions in the plate, and a wall portion inserted into the hole portion is formed on the wall surface. 2. A wall portion formed on the wall surface, the short circuit preventing structure of a circuit board according to claim 1, wherein the inclined with respect to the horizontal direction.