JPH0451467Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an electrolytic capacitor in which a case has a multilayer structure and a capacitor element is housed in the innermost part of the case.

[Technical background of the invention]

FIG. 2 is a sectional view of a conventional electrolytic capacitor. A capacitor element 2 is inserted into the outer case 1 shown in FIG. 2, and the capacitor element 2 is fixed within the outer case 1 with a fixing agent 3. Further, a tab 4 protruding from the capacitor element 2 is connected to a terminal 6. Terminal 6 is attached to substrate 5. This terminal 6 is used as an external terminal.

In a conventional electrolytic capacitor having such a configuration, the fixing agent 3 suppresses vibration and movement of the capacitor element 2. Note that the void 7 is a place where gas generated from the capacitor element 2 is stored.

[Problems with background technology]

In conventional electrolytic capacitors with such a structure, a large amount of fixing agent 3 is added to control the vibration of the capacitor element 2 in order to improve sound quality. However, if a large amount of fixing agent 3 is added, The air gap 7 decreases, and the pressure inside the outer case 1 increases due to the gas generated from the capacitor element 2, causing an accident such as an explosion.

[Purpose of invention]

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology, and aims to provide an electrolytic capacitor that can prevent an explosion accident by creating a sufficient air gap in the case, and also improve the sound quality. purpose.

[Summary of the idea]

The electrolytic capacitor of this invention has a multi-layered case structure, including an outer case, an inner case that is partially fixed inside the outer case, and a case that is housed inside the inner case and fixed with a fixing agent. The capacitor element is characterized by having a gap between the outer case and the inner case that contacts the capacitor element.

[Example of idea]

Examples of the electrolytic capacitor of this invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing the configuration of one embodiment. The same parts as in FIG. 2 are given the same reference numerals, and the explanation thereof will be omitted, and the parts different from FIG. 2 will be mainly described.

As is clear from comparing FIG. 1 with FIG. 2, in FIG. The capacitor element 2 is housed inside the case 8.

A sufficient amount of fixing agent 3 is contained in the inner case 8, and the capacitor element 2 is fixed to the inner case 8 by this fixing agent 3. The other configurations are the same as in FIG. 2.

With this configuration, the capacitor element 2 is fixed to the inner case 8 and also to the outer case 1, so vibrations of the capacitor element 2 are suppressed, and distortion characteristics are improved.

Further, since there is a gap 7 between the outer case 1 and the inner case 8, even if gas is generated from the capacitor element 2, the internal pressure inside the outer case 1 is suppressed, thereby eliminating accidents such as explosions.

[Effects of the invention] As described above, according to the electrolytic capacitor of this invention, the inner case is placed inside the outer case, the capacitor element is housed inside the inner case, and the capacitor element is fixed inside the inner case with a fixing agent. This allows a sufficient amount of the fixing agent to be applied to the capacitor element, thereby preventing vibration of the capacitor and improving sound quality.

Furthermore, since the multiple cases are used, there is sufficient air space within the outer case, and even if gas is generated from the capacitor element, an explosion accident can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of an embodiment of the electrolytic capacitor of this invention, and FIG. 2 is a sectional view of a conventional electrolytic capacitor. 1...Outer case, 2...Capacitor element, 3...
...Fixing agent, 4...Tab, 5...Substrate, 6...Terminal, 7...Gap.

Claims (1)

[Scope of utility model registration request] The device has an outer case, an inner case partially fixed inside the outer case, and a capacitor element housed in the inner case and fixed with a fixing agent, and between the outer case and the inner case. An electrolytic capacitor characterized by having a gap in contact with the capacitor element.