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Variable capacitor and producing method thereof

A manufacturing method and technology of capacitors, applied to variable capacitors, detailed information of mechanical variable capacitors, capacitors, etc., can solve problems such as unstable electrostatic capacitance, increased setting deviation, and difficulty in adjusting set electrostatic capacitance.

Inactive Publication Date: 2003-06-04
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Moreover, loose riveting will reduce the spring load of the drive plate 101 that applies pressure to the moving piece, weaken the adhesion force between the moving piece and the fixed piece, and produce a small gap at the interface between the moving piece and the fixed piece, etc.
For this reason, the capacitance becomes unstable, it is difficult to adjust the set capacitance, and the setting deviation (change in capacitance after setting) increases.

Method used

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  • Variable capacitor and producing method thereof
  • Variable capacitor and producing method thereof
  • Variable capacitor and producing method thereof

Examples

Experimental program
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Embodiment Construction

[0045] Hereinafter, embodiments of the variable capacitor and its manufacturing method according to the present invention will be described with reference to the drawings.

[0046] Such as figure 1 and figure 2 As shown, the variable capacitor 1 is composed of a stator 2 , a moving piece 3 , a drive plate 4 , an insulating case 5 , a moving piece joint 6 and a stator joint 7 arranged on the insulating case 5 .

[0047]The rectangular stator 2 is composed of a dielectric substrate 23 and has an insertion through hole 21 at its center. The diameter of the insertion through hole 21 is set to be slightly larger than the outer diameter of the center shaft portion 62 of the rotor joint 6 which will be described later. On substantially the left half of the lower surface of the dielectric substrate 23, the stator electrode 22 is formed by printing or the like.

[0048] The substantially semicircular movable piece 3 has an insertion through hole 31 at the center of its chord, and ...

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Abstract

The invention provides a variable capacitor and its manufacturing method by which loosening of a caulked part in a central axis due to heat during soldering a printed board or the like can be prevented. A variable capacitor 1 is comprised of a stator 2, a rotor 3, a driver plate 4, an insulative case 5, and a rotor terminal 6 and a stator terminal 7 that are provided in the insulative case 5. The rotor terminal 6 is provided with a lead 61 and a cylindrical central axis 62. A surface-treated film (for example, solder-plated film or Sn-plated film) 63 that is melted at a soldering temperature is formed on the surface of the lead 61. On the other hand, no surface-treated film that is melted at a soldering temperature is formed on the surface of the central axis 62.

Description

technical field [0001] The invention relates to a variable capacitor and a manufacturing method thereof. Background technique [0002] In general, a variable capacitor changes the effective facing area between the fixed electrode and the movable electrode by rotating the movable piece relative to the fixed piece, and changes the electrostatic capacity according to this change. As such a variable capacitor, a conventionally known variable capacitor is disclosed in Japanese Unexamined Patent Publication No. 2001-267178, for example. [0003] This kind of variable capacitor is fixed on the insulating casing of the movable piece joint and the fixed piece joint formed by inserting the fixed plate with the fixed plate electrode. And the central axis of the moving piece joint is inserted into and passed through the hole of the moving piece provided with the moving piece electrode, and then the moving piece is inserted into and passed through the drive plate with the spring for app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G5/01H01G5/00H01G5/06
CPCH01G5/01H01G5/06
Inventor 木下元祐岸下浩幸
Owner MURATA MFG CO LTD