Magnetic core and magnetic field shielding component and coil, transformer, electronic apparatus and camera device

A technology of shielding parts and electrophotography, which is applied in the direction of transformer/inductor magnetic core, transformer/inductor parts, transformers, etc., can solve the problems of not being easy to process into a suitable shape, high price, poor formability, etc., and achieve improvement Effect of effective magnetic permeability, elimination of heat loss, and prevention of eddy current

Inactive Publication Date: 2004-04-21
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned in the introduction of the magnetic core, the disadvantages of the ferrite sintered compact are its high price, it is not easy to process into a suitable shape, and its formability is poor

Method used

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  • Magnetic core and magnetic field shielding component and coil, transformer, electronic apparatus and camera device
  • Magnetic core and magnetic field shielding component and coil, transformer, electronic apparatus and camera device
  • Magnetic core and magnetic field shielding component and coil, transformer, electronic apparatus and camera device

Examples

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Effect test

no. 1 example

[0065] First, a first embodiment will be described below, which relates to a magnetic core of the present invention which can be used as an inductive element and which can be manufactured with high magnetic permeability and at low cost.

[0066] figure 1 It is a front view of the exciting coil (excitation coil of the present invention) using the magnetic core of the present invention. This excitation coil 100 is obtained by winding a coil 104 on a holding member 102, generally called a "bobbin". The magnetic core of the present invention is used for this holding member 102 .

[0067] That is, in the structure of the holding member 102, magnetic particles are arranged in a dispersed manner in the matrix material. Among them, the magnetic particles and matrix material having the characteristics of the present invention will be described in detail below.

[0068] (magnetic particles)

[0069] Magnetic particles include, in addition to fine powders, granular materials with sui...

no. 2 example

[0133] Next, a second embodiment will be described, which relates to the magnetic field shielding member of the present invention, which can easily provide the function of preventing electromagnetic field leakage at low cost.

[0134] In the first embodiment, an example is described in which a magnetic core using a material in which magnetic particles are arranged in a dispersed state in a matrix material is used as a part of a magnetic core constituting an inductance element such as an excitation coil or a transformer, thereby Improve the electromagnetic characteristics of the excitation coil or transformer. However, the material in which the magnetic particles are installed in the matrix material in a dispersed state can also be used for the function of preventing leakage of the electromagnetic field. For example, a member in which magnetic particles are also arranged in a dispersed state in a matrix material (that is, a magnetic field shielding member of the present inventi...

no. 3 example

[0143] Next, a third embodiment will be described, which relates to an inductance element employing the magnetic core of the present invention and the magnetic field shielding part of the present invention, which can realize high magnetic permeability easily and at relatively low cost. The magnetic field shielding component can realize the function of suppressing electromagnetic field leakage easily and at low cost. In this embodiment, a transformer will be described as an example of an inductance element.

[0144] Figure 5 It is a schematic cross-sectional view of a transformer using the magnetic core of the present invention (transformer of the present invention). The transformer of this embodiment is fabricated by providing the transformer main body 600 in a container 610 . The transformer body 600 is made by winding two coils, a primary coil 604a and a secondary coil 604b, on two opposite sides of an angular U-shaped holding member 602 . In addition, the container 610 ...

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Abstract

A magnetic core as a magnetic material that acts on an electromagnetic characteristic of the generated magnetic field and a magnetic field shield member that shields the magnetic field generated by magnetic field generation unit are structured such that magnetic particles are arranged in a base material under a dispersed state. As a result, a magnetic core in which an inductance can be set and a magnetic field shield member in which magnetic field leakage can be suppressed effectively, as well as an excitation coil, a transformer, electric equipment and an electrophotographic apparatus using them are easily provided at low costs.

Description

technical field [0001] The present invention relates to a magnetic core and a magnetic field shielding part, and an exciting coil, a transformer, an electric device and an electrophotographic device using the magnetic core and the magnetic field shielding part. More particularly, the present invention relates to: a magnetic core suitable for an inductance element such as a coil or a transformer, the magnetic core having a magnetic substance mounted to produce certain electromagnetic characteristics; and a magnetic field shielding member. The present invention also relates to excitation coils, transformers, electrical equipment and electrophotographic devices using them. Background technique [0002] The excitation coil or transformer of the inductance element, as a part with inductance, is an important part of electronic equipment and electrical appliances. An excitation coil is formed by winding a coil around a magnetic core and is commonly referred to as an electromagneti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/20G03G15/16G03G15/24H01F3/00H01F27/24H01F27/255H01F27/28H01F30/00H05B6/02
CPCG03G15/2053G03G2215/00151
Inventor 长谷波茂彦上原康博伊藤和善内藤康隆岡贯示马场基文大原秀明
Owner FUJIFILM BUSINESS INNOVATION CORP
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