JPH0457760U

JPH0457760U -

Info

Publication number: JPH0457760U
Application number: JP9954290U
Authority: JP
Priority date: 1990-09-21
Filing date: 1990-09-21
Publication date: 1992-05-18

Description

[Brief explanation of the drawing]

第１図は本考案の第１の実施例の加速度センサ
の外観斜視図、第２図はこのセンサの要部斜視図
、第３図はこのセンサを模式的に表した断面図、
第４図乃至第７図はこのセンサの各部の他の例を
示す図、第８図は本考案の第１の実施例の他の例
の加速度センサの要部斜視図、第９図は本考案の
第２の実施例の加速度センサの外観斜視図、第１
０図はこのセンサの断面図、第１１図は本考案の
第３の実施例の加速度センサの外観斜視図、第１
２図はこのセンサの断面図、第１３図は本発明の
第４の実施例の加速度センサの外観斜視図、第１
４図はこのセンサによる起電力波形図、第１５図
は本発明の第５の実施例の加速度センサの外観斜
視図、第１６図は従来例センサの外観斜視図であ
る。１，１０，２０，３０，４０，５０……加速度
センサ、３……可動永久磁石、６ａ……空隙部。 FIG. 1 is an external perspective view of an acceleration sensor according to a first embodiment of the present invention, FIG. 2 is a perspective view of essential parts of this sensor, and FIG. 3 is a sectional view schematically showing this sensor.
4 to 7 are views showing other examples of each part of this sensor, FIG. 8 is a perspective view of main parts of an acceleration sensor of another example of the first embodiment of the present invention, and FIG. 9 is a view of the present invention. External perspective view of the acceleration sensor according to the second embodiment of the invention, first
Fig. 0 is a sectional view of this sensor, Fig. 11 is an external perspective view of the acceleration sensor according to the third embodiment of the present invention, and Fig. 1
2 is a sectional view of this sensor, FIG. 13 is an external perspective view of an acceleration sensor according to a fourth embodiment of the present invention, and FIG.
4 is an electromotive force waveform diagram of this sensor, FIG. 15 is an external perspective view of an acceleration sensor according to a fifth embodiment of the present invention, and FIG. 16 is an external perspective view of a conventional sensor. 1, 10, 20, 30, 40, 50...Acceleration sensor, 3...Movable permanent magnet, 6a...Gap portion.

Claims

[Scope of Claim for Utility Model Registration] (1) An acceleration sensor that detects acceleration by electromagnetic induction, comprising an electromagnetic induction means formed by winding a coil around a magnetic core in which a gap is formed, and a magnetic core that receives a predetermined acceleration. and a movable permanent magnet arranged so as to be able to enter and exit the gap. (2) The acceleration sensor according to claim 1, further comprising a magnetic body capable of holding the movable permanent magnet at a position away from the air gap by magnetic attraction in a stationary state. (3) The acceleration sensor according to claim 1, wherein the movable permanent magnet can be held in the gap by magnetic attraction in a stationary state.