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Magnet assembly and method for making same, small sized electric appliance using same

An assembly and magnet technology, which is applied in the manufacture of inductors/transformers/magnets, electromechanical devices, and the manufacture of stator/rotor bodies, etc., which can solve the problems of thick terminals, difficult reflow soldering, and notch corrosion.

Inactive Publication Date: 2006-02-08
TOKYO PARTS IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the terminal is made of a magnetic body (iron plate) such as a yoke, there is a problem that the cutout is corroded and it is difficult to perform reflow soldering
In addition, the terminal is thick and the welding performance is poor. Therefore, it takes a long time to weld, and the heat insulation effect on the yoke and the resin base is greatly reduced.

Method used

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  • Magnet assembly and method for making same, small sized electric appliance using same
  • Magnet assembly and method for making same, small sized electric appliance using same
  • Magnet assembly and method for making same, small sized electric appliance using same

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Embodiment Construction

[0032] Detailed description of the embodiment

[0033] Each embodiment will be described in order below. However, sometimes the same symbols are attached to the parts that are the same as in the past in the embodiment, and the description thereof is omitted.

[0034] figure 1 It is the first embodiment of the present invention applicable to the magnet assembly of the electroacoustic transducer, that is to say, a yoke composed of a magnetic body with a shallow cylindrical magnet 1 installed through the acrylic double-sided adhesive material 1b for heat insulation The iron 2 raises the pole shoe 2a upwards in the center. Such as image 3 As shown, the yoke 2 is formed in a connected state from a first lead frame made of a galvanized steel sheet with a thickness of 0.35 to 0.5 mm. The power supply terminal 3 is formed in a connected state at the same pitch as the above-mentioned yoke on the second lead frame composed of a thin plate having good corrosion resistance and good s...

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Abstract

The present invention relates to a magnetic assembly, a manufacturing method thereof, and a small-sized electric device using the assembly. The small-sized electric part is provided with a yoke cut out of a first lead frame formed out of magnetic material, at least one terminal which is cut out of a second lead frame having corrosion resistance and easy solderbility and thinner than the first lead frame and is disposed so that at least one terminal may be insulated from the yoke, a base which is formed out of soldering resistant resin integrally-molded so that at least part of the yoke and the terminal may be insulated from each other and the separated part of the yoke may not protrude outward when viewed from the top, and an magnet disposed at the yoke.

Description

technical field [0001] The present invention relates to a magnet assembly for small electric devices, its manufacturing method, and small electric devices using it, such as electroacoustic transducers, DC motors and other electric machines. Background technique [0002] For a long time, people have known that the call (alarm) source of the mobile communication set uses electroacoustic transducers and silent call devices as vibrating motors, etc., and these all adopt magnet assemblies. [0003] When this magnet assembly is used in an electroacoustic transducer, the pole piece is raised in the center of the yoke composed of a magnetic body with a shallow cylindrical magnet, and is made of an integrated resin together with a plurality of power supply terminals. The base is composed of a pre-wound air-core coil installed on the above-mentioned pole piece, and its end is welded to the above-mentioned terminal. [0004] In order to utilize this magnet assembly to constitute an el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F7/06H01F27/28H01F41/00H04R11/02H04R11/04H02K33/00H02K13/00H01R39/06H01R39/24H02K1/12H02K3/47H02K5/08H02K5/22H02K7/06H02K15/02H02K15/03H04R9/02
CPCH02K1/12H02K7/063H02K3/47H01R39/06H04R9/025H02K5/08H01R39/24H02K5/225
Inventor 山口忠男
Owner TOKYO PARTS IND CO LTD
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