JPS6210981Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a capacitor with a discharge gap.

Capacitors with discharge gaps are well known. For example, it is common practice to form a discharge gap in a capacitor made of a laminate of a dielectric layer and positive and negative electrodes, with a pair of discharge electrodes connected to the terminals of the positive and negative electrodes facing each other. Needless to say, these discharge electrodes protect the capacitor. However, because the discharge needs to be carried out through air, the discharge electrode end and discharge gap are exposed to the air.
It was easily affected by dust, etc., and there was a risk that fluctuations in discharge voltage would occur.

This invention aims to solve this problem,
The object of the present invention is to provide a capacitor with a discharge gap whose discharge characteristics do not change. Note that in the present invention, the term capacitor does not exclude having other functions, and also includes RC composite parts with discharge gaps. Briefly stated, the present invention is a capacitor with a discharge gap characterized in that the discharge gap is filled with a resin that is porous, has many pinholes, or has many bubbles. As a result, the discharge gap is protected from foreign dust and the like, and the discharge starting voltage is stabilized.

1 to 3 show the structure of an RC composite part with a discharge gap according to one embodiment of the present invention.
Here, the dielectric layers of the capacitor section and the discharge section are made of the same ceramic dielectric material. This example is of a laminated chip type, in which one electrode 1 and the other electrode 2 are alternately laminated with a dielectric layer 3, and discharge electrodes 4 and 5 are laminated in parallel to these electrodes 1 and 2. A groove 6 is formed in the dielectric between the opposing ends of the electrodes 4,5. If necessary, a resistor 7 is further baked on the bottom surface of the laminate, and an external terminal 8 is connected to the electrode 1, the discharge electrode 4, and the left end of the resistor 7.
Then, the external terminal 9 connected to the right end of the electrode 2, discharge electrode 5, and resistor 7 is burned. A porous resin 10 is embedded in the groove 6, that is, the discharge gap, of the laminated chip-shaped RC composite component constructed in this way. As the resin, for example, epoxy resin, phenol resin, or the like containing a large number of air bubbles 11 may be used. Such porous resins are well known. Note that the bubbles do not have to be of the open-cell type, and isolated bubble-type ones are also acceptable. However, if there are too few bubbles, no discharge will occur, so it is necessary to design it appropriately. Note that FIG. 4 shows an equivalent circuit of the electronic component of the above embodiment.

According to the present invention, the discharge gap is protected from dirt and dust, the conditions of the discharge gap are kept constant, and a stable discharge starting voltage can be maintained.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a composite electronic component with a discharge gap of the present invention, Fig. 2 is a sectional view of the same, Fig. 3 is a partially enlarged sectional view of Fig. 2, and Fig. 4 is an equivalent circuit diagram of the electronic component. It is. The main symbols in the figure are as follows. 1, 2: capacitor electrode, 3: dielectric, 4,
5: discharge electrode, 6: discharge gap, 7: resistor,
8, 9: external electrode, 10: porous resin.

Claims (1)

[Claims for Utility Model Registration] 1. An integral structure in which a capacitor electrode and a pair of discharge electrodes having opposite discharge ends forming a discharge gap are laminated with the same ceramic dielectric layer interposed therebetween. A multilayer capacitor with a discharge gap having a structure, wherein a groove-shaped notch is formed between the discharge ends to form a discharge gap, and a porous resin is embedded in the discharge gap. . 2. The capacitor with a discharge gap according to claim 1, wherein the capacitor with a discharge gap is of a laminated chip type and has external terminals formed at both ends thereof. 3. The capacitor with a discharge gap according to claim 2, wherein a resistor is provided on the lower surface of the laminated chip type capacitor with a discharge gap.