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Magnetic detection apparatus

A magnetic detection device and the technology of the detection device are applied in the directions of measurement devices, electric devices, and electric/magnetic devices to transmit sensing components, which can solve problems such as the deterioration of the reliability of the output voltage of the detector.

Inactive Publication Date: 2012-12-05
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the reliability of the output voltage of the detector may deteriorate

Method used

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Examples

Experimental program
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no. 1 example

[0035] will refer to Figure 1A to Figure 3C A magnetic detection device 1 (hereinafter referred to as a detection device) according to a first embodiment will be described. For example, the detection device 1 includes: a magnetoelectric transducer (not shown) such as a Hall element; and a magnetic flux generator (not shown) such as a permanent magnet. When the flux generator is relatively rotated or moved about the magnetoelectric transducer to have a linear displacement relative to the magnetoelectric transducer, the magnetic field generated by the flux generator is changing. The detection device 1 detects a rotation angle or a linear displacement by combining a magnetic flux generator with a magnetoelectric transducer. That is, the detecting device detects a magnetic flux corresponding to a rotation angle or a linear displacement of the magnetic flux generator using the function of the magnetoelectric transducer, and generates a voltage corresponding to the detected magnet...

no. 2 example

[0062] will refer to Figure 4A to Figure 4D A detection device 1 according to a second embodiment will be described. In the detection device 1 according to the second embodiment, the opening portion 10 of the housing 3 is covered with the cover 22 . The cover 22 may be composed of, for example, a resin material similar to that of the housing 3 . The cover 22 has three through holes 23 corresponding to the extension terminals 13A to 13C. The extension terminals 13A to 13C penetrate through the respective through holes 23 , respectively. Furthermore, the extension terminal 13C has a stopper 24 to engage with the cover 22 when the extension terminals 13A to 13C penetrate the through hole 23 .

[0063] After the cover 22 is engaged with the extension terminal 13C by the stopper 24 , the cover 22 is integrated with the housing 3 by heat caulking to cover the opening 10 of the housing 3 . The housing 3 has a thermal caulking portion 25 at the second end side of the protrusion 1...

no. 3 example

[0065] will refer to Figure 5A and Figure 5B A detection device 1 according to a third embodiment will be described. The detection device 1 according to the third embodiment comprises a subassembly 27 comprising an insertion part 26 . The insertion part 26 includes the IC device 2 other than the IC package 5, the extension terminals 13A to 13C, and the capacitor 14, which are integrally molded by injection molding. The sub-assembly 27 is housed in the housing space 9 of the housing 3 , and then, the resin molded portion 4 is formed on a first portion of the outer surface 17 of the housing 3 .

[0066] With the above configuration, the positions of the extension terminals 13A to 13C and the position of the capacitor 14 are preliminarily defined and secured in the sub-assembly 27 . Then, the sub-assembly 27 is housed in the case 3 so that the IC package 5 is in contact with the sub-contact areas L0 to L4. Then, the resin molded portion 4 is formed on the first portion of t...

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PUM

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Abstract

A magnetic detection apparatus (1) includes an IC device (2), a casing (3) defining a housing space (9) of the IC device, and a resin mold portion (4) arranged on a first part of an outside surface (17) of the casing. The IC device includes an IC package (5) having a built-in magnetoelectric transducer, and lead wires (6). The housing space is defined by a second part of an inner wall of the casing. A predetermined portion of the second part of the inner wall is defined as a contact region (L0-L4), with which the IC device contacts. The resin mold portion is arranged other than a predetermined portion of a second part of the outside surface corresponding to the contact region. A position of the magnetoelectric transducer is determined by positions of the contact region and the resin mold portion.

Description

technical field [0001] The present disclosure relates to a magnetic detection device having a magnetoelectric transducer such as a Hall element. Background technique [0002] Conventionally, a magnetic detection device having a magnetoelectric transducer such as a Hall element is used to detect a rotation angle or a linear displacement. As disclosed in JP-A-2004-004114 (which corresponds to USP 6,407,503), the magnetic detection device includes an integrated circuit (IC) device molded with a resin material by injection molding. The IC device includes an IC package disposed inside the IC device. In this IC package, a magnetoelectric transducer and a processing circuit such as an amplification circuit are built. The position of the magnetoelectric transducer is defined and stabilized by molding the IC device. When molding an IC device, injection pressure caused by resin injection is applied to an IC package disposed within the IC device. Therefore, the characteristics of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/14G01K7/22
CPCG01R33/07G01D11/245G01D5/145
Inventor 水谷彰利河野尚明本多仁美泷口智之
Owner DENSO CORP
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