JP3994764B2 - Electrical equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrical device such as a lightning arrester for a distribution board in which a body is divided into two parts and parts are arranged in a side-fitting manner.
[0002]
[Prior art]
As this kind of electrical equipment, there is one shown in Japanese Patent Laid-Open No. 2 00-0 4 0 46. This has a body and cover that divides the body into two parts and arranges the parts in a side-fitting type, and a single printed circuit board is placed inside the body and cover. is doing.
[0003]
[Problems to be solved by the invention]
In this case, since one printed circuit board is disposed inside the body and the cover so as to straddle between the body and the cover, insulation between the printed circuit board and the outside of the container is caused by the gap between the body and the cover. Can't get enough distance. In addition, since all the electronic components are mounted on one printed board, there is a problem that the printed board becomes long and the vessel cannot be made compact.
[0004]
The present invention has been made in view of such a reason, and an object of the present invention is to provide an electric device that can sufficiently secure an insulation distance between a printed circuit board and the outside of a container and can be made compact. There is to do.
[0005]
[Means for Solving the Problems]
The electrical device according to claim 1 is provided in a body and a cover in which the body is divided into two parts and the parts are disposed in a side-fitting manner, and the body and the cover including the body and the cover, In an electrical apparatus including two printed circuit boards each mounted with an electronic component, the two printed circuit boards are divided into directions in which the electronic component mounting surfaces are in the direction between the body and the cover. Separately from the position on the body side and the cover side ,
The two printed circuit boards are electrically connected to each other by pins, the printed circuit board on the body side is composed of a high-power circuit section having a power circuit, and the printed circuit board on the cover side is composed of a low-power circuit section having a control circuit. And
The high-power circuit unit has a pair of fuses arranged in parallel on the printed circuit board on the body side, and a cut groove is formed in the printed circuit board on the body side between the pair of fuses, and the printed circuit board on the body side is The body is formed with a partition wall that enters the kerf and insulates between the fuses when housed in the body .
[0006]
According to the electrical device of the first aspect, the printed circuit board does not straddle the divided gap between the body and the cover, so that the insulation distance between each printed circuit board and the outside can be increased.
Since each printed circuit board is electrically connected to each other with a pin, each printed circuit board is firmly fixed with a pin, so when one printed circuit board is fixed to the body, the other printed circuit board is also fixed in the body, Therefore, the operation of arranging each printed circuit board in the container is facilitated, and it is possible to prevent the printed circuit boards from colliding with each other and breaking the electronic component. Moreover, the lead wire for electrically connecting the two printed boards can also be used as a pin.
One of the printed circuit boards is composed of a high-power circuit section having a power circuit, and the other of the printed circuit boards is composed of a weak-power circuit section having a control circuit. The diameter can be reduced, and the space between the two printed boards can be used effectively.
[0009]
An electric device according to a second aspect is the electric device according to the first aspect , wherein each of the printed circuit boards is disposed in such a manner as to face the mounting surface of the electronic device.
[0010]
According to the electric device according to claim 2, in addition to the same effects as claim 1, it becomes the electronic component is mounted between two printed circuit boards, less possibility that the electronic parts may be damaged by hitting the device body Become.
[0013]
According to a third aspect of the present invention, there is provided the electric device according to the first or second aspect , wherein the printed circuit board on the body side includes the fuse disposed in a laid state and a surge absorbing element disposed in a standing state. The cover-side printed board has a light emitting element, and the cover-side printed board is opposed to the fuse of the body-side printed board and is not opposed to the surge absorbing element. The body side printed circuit board is disposed so as to be opposite.
[0014]
According to the electric device of the third aspect , in addition to the same effect as that of the first or second aspect , the cover side on which the light emitting element is mounted at a position facing the lying fuse and not facing the standing surge absorbing element . Since the printed circuit board is disposed so as to face the printed circuit board on the body side, the interval between the printed circuit boards can be narrowed, and the body can be made compact.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. That is, this electrical device is a lightning arrester for a distribution board, and includes a body 1, a cover 2, and printed circuit boards 3 and 4.
[0016]
The body 1 and the cover 2 are formed by dividing the body into two parts and arranging the parts in a side-fit manner. Therefore, the body is configured by combining the body 1 and the cover 2. In the embodiment, for example, a screw hole 5 is formed on the body 1 side at the bottom, a screw insertion hole 6 is formed on the cover 2 side, and connected with screws 11, and two hooking holes 7 are formed on the body 1 side at the top. The cover 2 is provided with a locking claw 8 for locking to the hooking hole 7. The hooking hole 7 is formed in the display part 26 protruding to the cover 2 side. In addition, a screw hole may be formed in the cover 2, a screw insertion hole may be formed in the body 1, a locking claw may be formed in the body 1, and a catching hole may be formed in the cover 2.
[0017]
The printed circuit boards 3 and 4 are arranged in a container body composed of the body 1 and the cover, and each is mounted with an electronic component. The two printed circuit boards 3 and 4 are arranged such that the electronic component mounting surfaces 3a and 4a are oriented in the direction between the body 1 and the cover 2, so that the body 1 and the cover 2 are separated from each other, that is, from the opening edges 1a and 2a to the body 1 side. Separately disposed on the cover 2 side. In the embodiment, the printed circuit boards 3 and 4 are arranged in such a manner that the electronic device mounting surfaces 3a and 4a face each other, and the printed circuit boards 3 and 4 are electrically connected to each other by conductive pins 10, and at the same time. Both printed circuit boards 3 and 4 are also mechanically connected by pins 10, and each printed circuit board 3 and 4 is sufficiently separated from the opening edges 1 a and 2 a by setting the length of the pins 10. The printed circuit board 3 is composed of a high-power circuit section 46 (see FIG. 9, except for the weak-power circuit section 47) having a power circuit, and the printed circuit board 4 is composed of a weak-power circuit section 47 having a control circuit. In this case, the printed circuit board 3 has fuses 12 to 14 disposed in a laid state and surge absorbing elements 15 to 19 disposed in an upright state, and the printed circuit board 4 includes a light emitting diode or the like. The printed circuit board 4 is positioned so as to face the fuses 12 to 14 of the printed circuit board 3 and non-opposed to the surge absorbing elements 15 to 19. 3 is disposed opposite to the main body 3. The space between the fuses 12 and 13 of the printed circuit board 3 is narrowed, and a kerf 40 is formed at a position therebetween. Reference numerals 22 to 24 are input terminals made of receiving blades to be inserted into the conductive bars, and are connected to the fuses 12 to 14 by lead wires 52 to 54. Reference numeral 25 denotes a ground wire.
[0018]
In the body 1, 28 is a through hole for emitting light from the light emitting elements 20 and 21, and is formed between the hooking holes 7 of the display unit 26. A transparent seal that closes the through hole 28 can be attached. Moreover, it has the terminal mounting parts 30-32 for mounting | wearing with the input terminals 22-24 in the one side part of the body 1, and the groove | channel for inserting in the conductive bar (not shown) of a distribution board in the body 1 and the cover 2 33 is formed. Further, ribs 35 formed by ribs are formed on the inner wall surface of the body 1 at predetermined intervals to support the peripheral edge of the printed circuit board 3 accommodated in the body 1, and the positioning portion 36 of the printed circuit board 3 is formed on the inner wall. Are provided by protrusions. Further, two protrusions 37 and a fitting groove 38 intersecting the protrusions 37 are formed on the lower surface of the upper part of the body 1, and the extended piece 3 b extending in consideration of the insulation of the upper part of the printed circuit board 3 is fitted. It is positioned by being inserted and locked into the groove 38. When the printed circuit board 3 is inserted into the body 1, the end portions of the light emitting elements 20 and 21 are inserted into the through holes 28. Further, a partition wall 41 is formed in the body 1 to be inserted into the kerf 40 of the printed circuit board 3. The printed circuit board 4 is covered with the cover 2 in a state where the printed circuit board 3 is connected to the printed circuit board 3 and the pins 10 and the printed circuit board 3 is inserted and positioned in the body 1 as described above. It is pressed by the provided movement prevention piece 50.
[0019]
In addition, a locking claw 43 is provided on the upper surface of the body 1 and the cover 2 to keep it from being attached to the conductive bar of the distribution board, and a hook portion (not shown) provided on the distribution board on the side of the cover 2. A hooked portion 44 to be hooked is formed.
[0020]
FIG. 9 is a circuit diagram of a lightning arrester. As elements provided on the printed circuit board 3, L1, L2 are input terminals 22, 23, N is an input terminal 24, F1, F3 is fuses 12, 14, F2 is fuse 13, E Is a ground wire, ZNR1 to ZNR5 are surge absorbing elements 15 to 19, and GA is a gap. As elements provided on the printed circuit board 4, LED1 and LED2 are light emitting elements 20, 21, R1, R2 are resistors, and D1, D2 are diodes.
[0021]
The fuses F1 to F3, the surge absorbing elements ZNR3 to ZNR5, and the gap GA are connected in series to the conductive bar through the input terminals L1, L2, and N, and the voltage terminal to which the input terminals L1 and L2 are connected and the input terminal N are connected. Surge absorbing elements ZNR1 and ZNR2 and light emitting elements LED1 and LED2 are connected between fuses F1 to F3 with a neutral electrode as shown in the figure. In a normal state where no lightning surge has entered, the light-emitting elements LED1 and LED2 are turned on by being energized in the route of fuse F2 → light-emitting element LED1, LED2 → fuses F1 and F3. When a lightning surge enters, it is discharged in the normal route of fuse F1 (F2, F3) → surge absorbing element ZNR3 (ZNR4, ZNR5) → gap GA. That is, the surge between the poles is absorbed by the surge absorbing elements ZNR1 and ZNR2, and the discharge by the gap GA is stopped by the surge absorbing elements ZNR3 to ZNR5.
[0022]
In the present invention, the body and the cover include a case where the electronic component mounting surfaces do not face each other.
[0023]
【The invention's effect】
According to the electrical device of the first aspect, the printed circuit board does not straddle the divided gap between the body and the cover, so that the insulation distance between each printed circuit board and the outside can be increased.
Since each printed circuit board is electrically connected to each other with a pin, each printed circuit board is firmly fixed with a pin, so when one printed circuit board is fixed to the body, the other printed circuit board is also fixed in the body, Therefore, the operation of arranging each printed circuit board in the container is facilitated, and it is possible to prevent the printed circuit boards from colliding with each other and breaking the electronic component. Moreover, the lead wire for electrically connecting the two printed boards can also be used as a pin.
One of the printed circuit boards is composed of a high-power circuit section having a power circuit, and the other of the printed circuit boards is composed of a weak-power circuit section having a control circuit. can reduce the diameter, the space between the two printed circuit boards have can be effectively utilized.
[0025]
According to the electric apparatus according to claim 2, wherein, in addition to the same effects as claim 1, becomes the electronic component is mounted between two printed circuit boards, less possibility that the electronic parts may be damaged by hitting the device body Become.
[0027]
According to the third aspect of the present invention , in addition to the same effect as in the first or second aspect , the cover side of the cover side where the light emitting element is mounted at a position facing the laid fuse and not facing the standing surge absorbing element . Since the printed circuit board is disposed opposite to the printed circuit board on the body side, the interval between the printed circuit boards can be narrowed, and the body can be made compact.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an embodiment of the present invention.
FIG. 2 is an external perspective view of an assembled state.
FIG. 3 is a plan view thereof.
FIG. 4 is a perspective view before connection of the printed circuit board.
FIG. 5 is a side view of a state in which one printed circuit board is mounted on a body.
6 is a cross-sectional view taken along line AA in FIG.
7 is a cross-sectional view taken along line BB in FIG.
FIG. 8 is a side view showing a state where the other printed circuit board is attached in FIG. 5;
FIG. 9 is a circuit diagram.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Body 2 Cover 3 Printed circuit board 4 Printed circuit board 3a Electronic device mounting surface 4a Electronic device mounting surface 10 Pin 12-14 Fuse 15-19 Surge absorption element 46 High electric circuit part 47 Light electric circuit part

Claims (3)

A body and a cover in which the container body is divided into two parts, and the parts are arranged in a side-fit manner, and two prints which are disposed in the container body composed of these bodies and covers, each mounted with an electronic component In the electric device including the board, the two printed boards are arranged in such a direction that the electronic component mounting surfaces are in the direction between the body and the cover from the body and the cover split position. Are arranged separately ,
The two printed circuit boards are electrically connected to each other by pins, the printed circuit board on the body side is composed of a high-power circuit section having a power circuit, and the printed circuit board on the cover side is composed of a low-power circuit section having a control circuit. And
The high-power circuit unit has a pair of fuses arranged in parallel on the printed circuit board on the body side, and a cut groove is formed in the printed circuit board on the body side between the pair of fuses, and the printed circuit board on the body side is An electric device in which a partition is formed in the body that enters the kerf and insulates between the fuses when housed in the body . Respectively, electrical equipment according to claim 1, wherein is disposed in a manner facing the electronic apparatus mounting surface of the printed circuit board. The printed circuit board on the body side includes the fuse disposed in a laid state and a surge absorbing element disposed in an upright state, the printed circuit board on the cover side includes a light emitting element, and the cover side The printed circuit board is disposed to face the printed circuit board on the body side so as to face the fuse of the printed circuit board on the body side and to be a non-opposed position to the surge absorbing element. Item 3. The electric device according to item 1 or 2 .

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