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Ceramic insulating electrical wire, composition,coil for coating and sound coil for loudspeaker

A technology of ceramic insulation and composition, applied in the direction of sensors, electrical components, etc., can solve problems such as reduction of coil characteristics

Inactive Publication Date: 2004-01-14
TOHOKU PIONEER CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the characteristics of the coil will be lowered when the temperature of the self-heat-fusible wire reaches 350°C or higher.

Method used

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  • Ceramic insulating electrical wire, composition,coil for coating and sound coil for loudspeaker
  • Ceramic insulating electrical wire, composition,coil for coating and sound coil for loudspeaker
  • Ceramic insulating electrical wire, composition,coil for coating and sound coil for loudspeaker

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0056] figure 1 It is a sectional view showing the ceramic insulated sheathed electric wire 10 according to the first embodiment of the present invention.

[0057] The ceramic insulating sheathed electric wire 10 has a structure in which a ceramic insulating film 2 is formed around a conductor 1 .

[0058] The above-mentioned conductor 1 is a copper wire with a diameter of 0.02-0.5 mm.

[0059] The above-mentioned ceramic insulating film 2 is to be figure 2 The coating composition described in Composition Example 1, Composition Example 2 or Composition Example 3 is applied on the conductor 1 and then thermally cured (heat-cured). The thickness of the ceramic insulating film 2 is 3 to 12 μm.

[0060] image 3 The chemical structural formula of the above-mentioned ceramic insulating film 2 is shown.

no. 2 Embodiment approach

[0062] Figure 4 It is a cross-sectional view showing a self-heat-fusible ceramic insulated sheathed electric wire 20 according to a second embodiment of the present invention.

[0063] This self-heat-fusible ceramic insulated electric wire 20 has a structure in which a heat-fusible film 3 is formed on the outer periphery of the above-mentioned ceramic insulated electric wire 10 .

[0064] The hot-melt film 3 is formed by applying a coating made of a polyamide resin or polyimide resin dissolved in an organic solvent on the ceramic insulated sheathed electric wire 10 and then thermally curing (heat curing). The thickness of the hot-melt film 3 is 3-10 μm.

[0065] The above-mentioned polyamide-based resin is used under the trade name of M1178 or M1603 from elf atchem Co., Ltd., Germany.

[0066] In addition, the said polyimide-type resin used the trade name BT2100 of Mitsubishi Gas Chemical Corporation.

no. 3 Embodiment approach

[0068] FIG. 5 is a cross-sectional view showing a speaker voice coil 30 according to a third embodiment of the present invention.

[0069] The structure of the speaker voice coil 30 is: the above-mentioned self-heat-fusible ceramic insulated sheathed wire 20 (outer diameter: 0.25mm) is wound around the periphery of the cylindrical bobbin 31 to form a winding wire (resistance value: 3.5Ω). , Heated at 190°C for 30 minutes to fuse the winding wires together. Among them, polyamide-based varnish is used for the fused sheath 3 of the self-heat-fusible ceramic insulated sheathed electric wire 20 .

[0070] The above-mentioned bobbin 31 is made of glass fiber cloth coated with polyimide resin.

[0071] Figure 6 It is a cross-sectional view showing a high-output speaker 40 using the speaker voice coil 30 described above.

[0072] The structure of this high output speaker 40 is: the voice coil 30 for the speaker is supported by the damper 42 on the frame 41, the vibration plate 43 ...

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Abstract

The invention provides an electric wire with ceramic insulation sheath produced by, applying the coating composition containing zirconium compound and silicon compound on the conductor for heat solidifying, forming a ceramic insulation sheathed film, and applying organic solvent hot melt paint that can make polyamide resinoid or medlin resinoid dissolve for heat solidifying, forming a hot melt sheathed film, thus producing the self hot-melting ceramic insulation sheathed electric wire which can retain coil characteristic under high temperature. The invention can also be used to the spiral of the high output loudspeaker voice coils.

Description

technical field [0001] The present invention relates to a ceramic insulated sheathed electric wire, a self-heating fusible ceramic insulated sheathed electric wire, a composition for coating, a coil and a voice coil for a loudspeaker. More specifically, it relates to a ceramic insulated sheathed electric wire capable of maintaining coil characteristics even at high temperatures, a self-heating fusible ceramic insulated sheathed electric wire, a coating composition for producing the above ceramic insulated sheathed electric wire, and a ceramic insulated sheathed wire using the above Coils for wires and voice coils for speakers. Background technique [0002] Conventionally, as voice coils for speakers and motor coils, coils in which self-thermal fusion electric wires are wound up in a row are used. [0003] In such a self-heating fusible electric wire, an insulating paint such as polyester is used for the insulating film. In addition, in the hot-melt film, an ethanol-soluble...

Claims

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Application Information

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IPC IPC(8): H04R9/02
Inventor 石垣敏宏小林美隆岛田智雪上原正丈
Owner TOHOKU PIONEER CORP
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