JPH0314037Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a composite cylindrical porcelain capacitor.

(Prior Art) In conventional cylindrical porcelain capacitors, in order to increase the capacitance, the area of the opposing electrodes was increased or the thickness of the cylindrical porcelain was made thinner.

(Problems to be Solved by the Invention) Conventional cylindrical porcelain capacitors are enlarged in shape to obtain a desired capacitance, but this is undesirable because it goes against the demand for miniaturization in the industry. Furthermore, if the thickness of the porcelain is made thinner to increase the capacitance, the porcelain will be more likely to break, resulting in a lower yield in the manufacturing process and making it difficult to use it in an automatic insertion machine.

The present invention aims to eliminate such inconveniences.

(Means for Solving the Problems) The present invention provides one or more cylindrical porcelain capacitors in the internal space of a cylindrical porcelain capacitor element, which is formed by attaching electrodes to both the inner and outer peripheral surfaces of cylindrical porcelain. The device is characterized in that the capacitor elements are fitted and the electrodes of these capacitor elements are connected in parallel (Embodiment) An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the present invention.

In the drawing, 1A and 1B are cylindrical porcelain capacitor elements, respectively, and these two capacitor elements 1A and 1B are respectively attached to the outer peripheral surfaces of cylindrical porcelains 2A and 2B, and one end is attached to the side surface of the cylindrical ceramics 2A and 2B. The external electrodes 3A, 3B extending to the porcelain 2
A, 2B is adhered to the inner circumferential surface of the porcelain 2A,
Internal electrodes 4A and 4B are provided that slightly extend from the other side of 2B to the outer peripheral surface.

The cylindrical porcelain 2A, 2B is made of a material with a high dielectric constant, such as a strontium titanate porcelain semiconductor or a barium titanate porcelain half body, and the external and internal electrodes 3A, 3B, 4A, 4B are made of a paste of silver, zinc, copper, etc. The adhesive is formed by coating.

The diameter of the internal space of the cylindrical ceramic capacitor element 1A is slightly larger than the outer diameter of the capacitor element 1B. Therefore, the capacitor element 1B is fitted into the internal space of the capacitor element 1A in the opposite direction, and the outer electrode 3A and the inner electrode 4B are soldered on one side, and the inner electrode 4A and the outer electrode 3B are soldered on the other side. Electrical connection is made with a conductive adhesive material 5 such as conductive paste, thereby connecting the capacitor element 1
Connect electrodes A and 1B in parallel. Thus, the capacitance of a capacitor is approximately 1.7 that of one capacitor element.
It will be doubled.

The capacitor shown in the second diagram is an axial lead type capacitor which has an axial lead 6 for connection with an external circuit, and the cap 7 is planted around the lead 6 and is fitted to both ends of the capacitor 1A. and conductively adhere.

What is shown in Fig. 3 is a capacitor element 1A.
A capacitor element 1C is further fitted into the inner space of the capacitor element 1B fitted into the inner space of the capacitor element 1B, and the outer and inner electrodes 3C and 4C are connected to the inner and outer electrodes 4B and 4C of the capacitor element 1B, respectively, in the same manner as described above.
3B and conductive adhesive material 5, and the electrodes of capacitor elements 1A, 1B, and 1C are all connected in parallel.

Thus, the capacitance of the capacitor is approximately 2.3 times that of a single capacitor element.

Note that the number of capacitor elements may exceed three as long as the internal space of the capacitor elements allows.

Also, it can be a chip type capacitor that does not use leads.

(Effects of the invention) The present invention has one or more cylindrical porcelain capacitor elements fitted into the internal space of a cylindrical porcelain capacitor element, which is formed by coating electrodes on both the inner and outer peripheral surfaces of cylindrical porcelain. Since the electrodes of these capacitor elements are connected in parallel, the capacitance can be increased without increasing the size, and there is no need to reduce the thickness of the cylindrical porcelain of the capacitor element, which reduces the risk of damage. This has effects such as being able to prevent a decrease in yield.

[Brief explanation of the drawing]

FIG. 1 is an exploded sectional view of a main part of an embodiment of the present invention, FIG. 2 is a sectional view of the embodiment, and FIG. 3 is a sectional view of a main part of another embodiment of the invention. 1A, 1B, 1C... Cylindrical porcelain capacitor element, 2A, 2B, 2C... Cylindrical porcelain, 3A, 3
B, 3C...external electrode, 4A, 4B, 4C...internal electrode, 5...conductive adhesive material.

Claims (1)

[Scope of utility model registration request] One or more cylindrical porcelain capacitor elements are fitted into the internal space of a cylindrical porcelain capacitor element, which is formed by coating electrodes on both the inner and outer peripheral surfaces of cylindrical porcelain, and the electrodes of these capacitor elements are A composite cylindrical ceramic capacitor characterized by being connected in parallel.