JP2841575B2 - Electrolytic capacitor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic capacitor used for audio electronic equipment and the like.

2. Description of the Related Art As shown in FIG. 3, a conventional electrolytic capacitor of this type is obtained by roughening a valve metal foil and then forming a dielectric oxide film by anodic oxidation to form an anode foil. And a cathode foil opposite thereto are wound through a separator to form a capacitor element 1, which is impregnated with a driving electrolyte and accommodated in a bottomed cylindrical metal case 2. Then, a sealing body is attached to the opening of the metal case 1 so that the internal driving electrolyte does not evaporate, and a resin tube 3 is put on the outside of the metal case 1.

Problems to be Solved by the Invention However, in the case of an electrolytic capacitor having the above-mentioned structure, when mounted on an acoustic electronic device or the like and used, vibrations from the outside or minute vibrations of the electrolytic capacitor itself cause a problem in FIG. The top surface portion 2a of the metal case 2 and the resin tube 3 that covers the outside of the metal case 1 vibrate, and this vibration affects the transmission of music signals and the like, resulting in deterioration of sound quality. However, there is a problem that the sound quality is deteriorated due to the influence of the magnetic flux generated from the transformer mounted on the device.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide an electrolytic capacitor capable of preventing sound quality deterioration and reproducing music of high sound quality.

Means for Solving the Problems In order to solve the above problems, the electrolytic capacitor of the present invention is provided with a cylindrical resin case which houses a capacitor body constituted by equipping a capacitor element in a metal case. In the case, the capacitor main body is positioned and fixed by a filler made of an elastic body, and a metal plate is attached to a facing portion of the resin case facing the top surface of the metal case to form a magnetic-shield structure.

Operation According to the above configuration, since the capacitor body constituted by equipping the capacitor element in the metal case is positioned and fixed in the cylindrical resin case with the filler made of the elastic body, the external With respect to the vibration, the propagation of the vibration can be reduced by the filler, whereby the influence on the capacitor element can be reliably prevented. Also, since a metal plate is attached to the opening facing the top surface of the metal case of the resin case, the metal plate also prevents magnetic flux from the electrolytic capacitor itself and magnetic flux generated from external electronic components and the like. Since the magnetic flux can be reduced, the influence of vibration and magnetic flux can be reduced in this way, so that the sound quality does not deteriorate as in the past, and as a result, music reproduction with high sound quality is achieved. Is what you can do.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In FIGS. 1 and 2, reference numeral 11 denotes an anode foil formed by forming a dielectric oxide film by anodic oxidation after roughening a valve metal foil such as aluminum, and facing the anode foil and the anode foil. A capacitor element formed by winding a cathode foil and a separator through a separator.This capacitor element 11 is impregnated with a driving electrolyte, and the capacitor element 11 is mounted in a bottomed cylindrical metal case 12. By doing so, the capacitor body 13 is configured.

Reference numeral 14 denotes a cylindrical resin case that houses the capacitor body 13 .When the capacitor body 13 is fixed to the resin case 14, the capacitor body 13 is provided in the resin case 14, and the silicone resin is contained in the resin case 14. By injecting the filler 15 consisting of an elastic body mainly composed of
The capacitor body 13 is positioned and fixed in the resin case 14. The top surface 12 of the metal case 12 of the resin case 14
A metal plate 16, such as a copper plate, is attached to the opening 14a facing a to form a magnetically shielded structure. And also the resin case 14
At the lower end, several mounting portions 17 are provided to facilitate mounting on electronic devices and the like.

As is apparent from the above-described configuration, in one embodiment of the present invention, the capacitor body 13 configured by mounting the capacitor element 11 in the metal case 12 is provided in a cylindrical resin case 14 such as a silicone resin. Since the positioning and fixing are performed by the filler 15 made of an elastic material, the propagation of the vibration can be reduced by the charging agent 15 against external vibration, and as a result, the influence on the capacitor element 11 is also ensured. Can be prevented.

Further, since the metal plate 16 such as a copper plate is attached to the opening 14a facing the top surface 12a of the metal case 12 of the resin case 14, the magnetic flux is generated from the electrolytic capacitor itself, or is generated from external electronic components and the like. Even with respect to magnetic flux, the metal plate 16 such as a copper plate can reduce the magnetic flux, which does not cause deterioration of sound quality unlike the related art, so that high-quality music can be reproduced.

Effect of the Invention As is clear from the description of the above embodiment, the electrolytic capacitor of the present invention fills a capacitor body constituted by mounting a capacitor element in a metal case, and fills a cylindrical resin case with an elastic body. Since the positioning is fixed by the agent, the propagation of the vibration can be reduced by the filler with respect to the vibration from the outside, so that the influence on the capacitor element can be reliably prevented.
Also, since a metal plate is attached to the opening facing the top surface of the metal case of the resin case, the metal plate also prevents magnetic flux from the electrolytic capacitor itself and magnetic flux generated from external electronic components and the like. Since the magnetic flux can be reduced, the influence of vibration and magnetic flux can be reduced in this way, so that the sound quality does not deteriorate as in the past, and as a result, music reproduction with high sound quality is achieved. Is what you can do.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electrolytic capacitor showing one embodiment of the present invention, FIG. 2 is a cutaway front view of the electrolytic capacitor, and FIG. 3 is a cutaway perspective view showing a conventional electrolytic capacitor. 11 ... capacitor element, 12 ... metal case, 13 ... capacitor body, 14 ... resin case, 15 ... filler, 16 ...
Metal plate.

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Toshihiro Sugikata 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. In-house (72) Inventor Hideto Sawae 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. ) Surveyed fields (Int. Cl. ⁶ , DB name) H01G 9/08 H01G 9/06 H01G 9/00

Claims (1)

(57) [Claims] A cylindrical resin case for housing a capacitor body formed by mounting a capacitor element in a metal case is provided, and the capacitor body is positioned in the resin case by a filler made of an elastic body. An electrolytic capacitor which is fixed and has a magnetically shielded structure in which a metal plate is attached to an opening of the resin case facing the top surface of the metal case.