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Magnetic sensor

A magnetic sensor and a technology using magnets, which are applied in magnetic performance measurement, instruments, coin inspection, etc., can solve the problems of peeling off of the cover, decrease of peel strength, and decrease of cover rigidity

Active Publication Date: 2014-06-04
NIDEC SANKYO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a thin cover is used, there is a problem that the cover is easily peeled off from the case of the magnetic sensor device because the rigidity of the cover is lowered and the peeling strength is lowered.

Method used

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Experimental program
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Embodiment approach ）

[0072] In the above example, although etching is used to form the recess 114 of the cover plate 11, since it is not necessary to form a corner between the bottom surface portion 114b and the annular wall portion 114c, it is possible to use turret-type hexagonal hole punching, laser processing, etc. etc. instead of etching. .

[0073] In the above example, the thickness dimension of the cover plate 11 is larger than that of the support plate 12 , but the cover plate 11 may have the same thickness dimension as the support plate 12 . In addition, the thickness dimension of the support plate 12 may be larger than the thickness dimension of the cover plate 11 .

[0074] In the above-mentioned example, when each magnet 16 is fixed on the cover plate 11 and the support plate 12, the position of each magnet 16 on the cover plate 11 is adjusted by utilizing the gap between each magnet 16 and the inner peripheral surface of each through hole 124. Although fine adjustment is performed,...

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PUM

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Abstract

The invention provides a magnetic sensor; the magnetic sensor can ensure rigidity of a cover plate between a transmission surface and a magnet when a gap between the transmission surface of a medium and the magnet narrows down; the magnetic sensor comprises the following elements: the magnet magnetizing the medium of a reading object; the cover plate with a front surface having the transmission surface transmitting the medium and a back surface having a recessed portion allowing a top portion of the magnet to be plugged and fixed; a bearing plate stacked and fixed on the back surface of the cover plate, and is provided with a through hole allowing a rear portion of the magnet to plug in, and the rear portion protrudes from an opening of the recessed portion; because the gap G between the transmission surface and the magnet is the dimension between a bottom portion of the recessed portion and the transmission surface, so when the gap G is narrowed, the thickness of the cover plate can be enhanced, thereby ensuring rigidity of the cover plate, and improving peeling intensity.

Description

technical field [0001] The present invention relates to a magnetic sensor device for detecting a magnetic pattern of a medium such as banknotes printed with magnetic ink. Background technique [0002] This magnetic sensor device includes a magnetization magnet for magnetizing a medium, and a magnetic field detection unit for reading a magnetic pattern of the medium magnetized by the magnetization magnet. The magnetizing magnets are covered by a cover plate, which has a transport surface for the transport medium on its front side, which prevents wear and tearing of the magnetizing magnets. [0003] Since the thickness dimension of the cover plate is the gap between the conveying surface of the conveying medium and the magnetization magnet, it is necessary to make the cover plate thinner. However, if a thin cover is used, since the rigidity of the cover decreases and the peel strength decreases, there is a problem that the cover is easily peeled off from the case of the magne...

Claims

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Application Information

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IPC IPC(8): G07D5/08G01R33/12
Inventor 百濑正吾持田哲雄
Owner NIDEC SANKYO CORP