JP2014003193A - Capacitor holder and circuit board unit mounted with the capacitor holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a capacitor holder having a fire prevention structure capable of solving a problem of conventional capacitor holders that, when an explosion-proof valve of an aluminum electrolytic capacitor is opened due to an over-voltage resulting in an electrolyte leakage and/or vapor thereof generated, a spark generated by another component may cause a fire of the electrolyte adhered on the circuit board or other components.SOLUTION: A capacitor holder 1 includes a hole of the capacitor holder (vent hole) 4 and is disposed at an end of a circuit board 3 in a state that the capacitor holder 1 is sideways. Since the hole (vent hole) 4 of the capacitor holder is oriented outward with respect to the circuit board 3, the electrolyte and the vapor thereof in the aluminum electrolytic capacitor 2 is released out of the circuit board 3. A spark generated by the circuit board 3 or another component is prevented from catching a fire.

Description

  The present invention relates to a capacitor holder.

  Conventionally, this type of capacitor holder is provided with an overlap for causing a fire to run out of the inside of the fireproof case when a flame is generated from the top surface of the aluminum electrolytic capacitor (for example, Patent Document 1). reference).

JP-A-8-138965

  However, in the above-described conventional configuration, the electrolytic solution and its vapor pass between the aluminum electrolytic capacitor and the capacitor holder and adhere to the circuit board. Therefore, when other components on the circuit board spark, the electrolytic solution burns. Had a problem of fire.

  The present invention solves the above-mentioned conventional problems, and the capacitor holder has a structure in which the electrolyte and its vapor do not adhere to the circuit board (the other parts on the circuit board do not ignite the electrolyte even if they spark). The purpose is to provide.

In order to solve the above-mentioned conventional problems, the capacitor holder of the present invention has a case in which a hole is formed in a ceiling surface of an aluminum electrolytic capacitor (with a fire extinguishing action) or a straw-like vent is provided to cover a circuit board, heat dissipation In this structure, the electrolytic solution and its vapor are discharged from a vessel or the like. As a result, the electrolytic solution is not applied to other components on the circuit board.

  The capacitor holder of the present invention can discharge the electrolyte and its vapor to the outside of the circuit board.

Configuration diagram of capacitor holder in Embodiment 1 of the present invention Configuration diagram of capacitor holder in Embodiment 2 of the present invention

  According to a first aspect of the present invention, a capacitor holder is provided with a hole (vent hole) through which the electrolytic solution of the aluminum electrolytic capacitor and its vapor pass, so that the electrolyte solution and its vapor pass outside the capacitor holder through the hole (vent hole). Thus, the electrolytic solution does not adhere to the circuit board and other components, and even if the circuit board and other components emit a spark (fire type), the electrolytic solution can be prevented from igniting.

According to the second invention, in particular, the capacitor holder of the first invention is a capacitor holder having a straw-shaped hole (vent) for passing the electrolytic solution of the aluminum electrolytic capacitor and its vapor. When there is a distance other than the end of the circuit board or when there is a distance, it becomes effective as a path through which the electrolyte and its vapor pass, and the electrolyte and its vapor can be discharged out of the circuit board.

According to the third aspect of the invention, in particular, the overall structure of the capacitor holder of the first or second aspect is made of resin, so that conduction by the capacitor holder can be prevented.
According to a fourth aspect of the present invention, when the capacitor holder of the second aspect is provided with an outer case, a radiator or the like, the hole (vent hole) of claim 3 is outside the hole (vent hole) of the outer case or the radiator. By adopting a structure that can be discharged, it is effective as a path through which the electrolyte and its vapor pass even inside the case, and the electrolyte and its vapor can be discharged out of the circuit board.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a configuration diagram of a capacitor holder according to the first embodiment of the present invention.

  In FIG. 1, a capacitor holder 1 covers an aluminum electrolytic capacitor 2 and has a plurality of terminals for placing the capacitor holder 1 on a circuit board 3. At the end, the capacitor holder 1 can be fixed by soldering or the like with the top surface portion facing the outside of the circuit board 3. The top surface portion of the capacitor holder 1 is provided with a hole (vent hole) for the capacitor holder. In addition, when there exists an outer case, it can comprise by aligning the position of a slit or a hole of an outer case. An electrolyte receiver can also be configured outside the outer case.

  The operation and action of the capacitor holder configured as described above will be described below.

  First, the explosion-proof valve of the aluminum electrolytic capacitor is opened due to overvoltage, and the electrolytic solution and its vapor are released outside the aluminum electrolytic capacitor. Since there is the capacitor holder 1, the electrolyte and its vapor do not adhere to the circuit board 3 as they are, and can be discharged out of the circuit board 3 through the hole (vent hole) 4 of the capacitor holder. When there is an outer case, it can be discharged out of the case through a slit or hole in the outer case. If the electrolyte does not droop outside the case, an electrolyte receiver can be provided to prevent the electrolyte from dripping.

  As described above, in the present embodiment, the capacitor holder is provided with a hole (vent hole) to be out of the circuit board, so that the electrolyte and its vapor do not adhere to the circuit board 3 or other components. Even if a spark is generated from the circuit board 3 or other parts, the ignition can be prevented.

  Further, in the present embodiment, the configuration in which the outer case is provided with the electrolytic solution receiver prevents the electrolytic solution from dripping or scattering from the outer case, and collects the electrolytic solution so that it does not drip or scatter. It can also be done.

  In addition, by combining a plurality of capacitor holders of the present embodiment, especially in the case of a configuration in which a plurality of aluminum electrolytic capacitors are densely arranged, the space for arranging the aluminum electrolytic capacitors on the circuit board is reduced, and a high density arrangement is achieved. Can do.

(Embodiment 2)
FIG. 2 shows a configuration diagram of a capacitor holder according to the second embodiment of the present invention.

  In FIG. 2, the capacitor holder 8 covers an aluminum electrolytic capacitor 9 (may be fixed to the circuit board 10 by soldering, etc.), and the capacitor holder 8 is provided with a hole (vent hole) for the capacitor holder. ing. A horizontal type can also be configured according to the direction of the capacitor. In addition, when there is the outer case 6, it can be configured by aligning the positions of the slits or holes of the outer case 6. An electrolyte receiver can also be configured outside the outer case 6.

  The operation and action of the capacitor holder configured as described above will be described below.

  First, the explosion-proof valve of the aluminum electrolytic capacitor is opened due to overvoltage, and the electrolytic solution and its vapor are released outside the aluminum electrolytic capacitor. Since there is a capacitor holder, the electrolyte and its vapor do not adhere to the circuit board as they are, and can be discharged out of the circuit board through the hole (vent hole) 5 of the capacitor holder. Note that the vent can also be inclined. In addition, when there exists the outer case 6 or the heat radiator 7, it can discharge | release outside a case through the slit or hole of the outer case 6 or the heat radiator 7, etc. If the electrolyte does not droop outside the case, an electrolyte receiver can be provided to prevent the electrolyte from dripping.

  As described above, in the present embodiment, the capacitor holder 8 is provided with a hole (vent hole) to be taken out of the circuit board, so that the electrolyte and its vapor do not adhere to the circuit board or other components. Even if a spark is generated from a circuit board or other parts, ignition can be prevented.

  In the other embodiment, since the outer case 6 is provided with the electrolytic solution receiver, the electrolytic solution is prevented from dripping or scattering from the outer case 6, and the electrolytic solution is collected and dropped. It can also be prevented from scattering.

  In addition, by combining a plurality of capacitor holders of the present embodiment, especially in the case of a configuration in which a plurality of aluminum electrolytic capacitors are densely arranged, the space for arranging the aluminum electrolytic capacitors on the circuit board is reduced, and a high density arrangement is achieved. Can do.

  As described above, the capacitor holder according to the present invention prevents ignition even when a spark is generated from the circuit board or other components when the explosion-proof valve of the aluminum electrolytic capacitor is opened and an electrolyte and its vapor are generated during overvoltage. Since it becomes possible, it is applicable also to uses, such as the apparatus (field | area which uses a power supply circuit) which uses an aluminum electrolytic capacitor.

1, 8 Capacitor holder 2, 9 Aluminum electrolytic capacitor 3, 10 Circuit board 4, 5 Capacitor holder hole (vent)
6 Outer case 7 Radiator

Claims (4)

A capacitor holder having an inner top surface portion and an inner side surface portion in the internal shape, and there is a gap between the capacitor housed in the capacitor holder and the inner top surface portion, and the capacitor and the inner side surface portion are spaced from the gap between the inner top surface portion. Adhering so that ventilation is not possible, and has a hole for ventilation from the inner top surface portion to the outer top surface portion of the capacitor holder,
The capacitor holder is configured so that a side surface of the capacitor is parallel to the circuit board with respect to a circuit board on which the capacitor is mounted, and the external top surface is positioned at an end of the circuit board. A capacitor holder is attached, and the capacitor holder includes a plurality of circuit board mounting terminals on an outer side surface of the capacitor holder, and the capacitor holder is attached to the circuit board by the circuit board mounting terminals. A capacitor holder having an inner top surface portion and an inner side surface portion in the internal shape, and there is a gap between the capacitor housed in the capacitor holder and the inner top surface portion, and the capacitor and the inner side surface portion are spaced from the gap between the inner top surface portion. Adhering so that ventilation is not possible, and has a hole for ventilation from the inner top surface portion to the outer top surface portion of the capacitor holder,
A capacitor holder comprising a straw-like tube in the ventilation hole of the external top surface portion, and a discharge port of the tube being connected to the outside of the circuit board on which the capacitor is mounted. 3. The capacitor holder according to claim 1, wherein the capacitor holder is integrally formed of resin with an overall structure having an internal shape and an external shape. An outer case or a radiator of the circuit board is provided, and the pipe passes through a hole for ventilation of the outer case or a hole of a vent of the radiator, and is outside the outer case or the radiator with respect to the circuit board. The circuit board unit having the capacitor holder according to claim 2, wherein the discharge port is connected to the discharge port.

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