Impact sensor and impact pressure sensor

Abstract

To attain an impact sensor designed compact and to be readily assembled.The impact sensor comprises main part 100 of sensor involving cavity 110, of which bottom surface serves as the fracture part 120; impact force transfer member 130 provided on said fracture part 120; weight 200 being confined in said cavity 110; and seal member 300 to close the cavity 110 with the weight 200 left confined therein, whereby the fracture part 120 is apt to be broken up by the weight 200, when an impact exceeding the predetermined value has been encountered.

Description

technical field [0001] The present invention relates to such impact sensors installed in, for example, video cameras or other precision instruments or airbags in the automotive industry, which will cause an electrical current to interrupt movement when an impact force exceeding a predetermined value is encountered, and to electronic components which are A collision pressure sensor designed to interrupt current flow when a collision or pressure exceeding a predetermined value is developed at a lithium-ion battery, capacitor, etc.). Background technique [0002] Various rechargeable batteries such as lead storage batteries, nickel-cadmium batteries, etc. are incorporated in general electronic devices such as cellular phones, video cameras, and the like. These batteries are susceptible to such troubles as overcharge or short-circuit conditions caused by malfunctioning or mishandling of electronic devices, in which case overheating of the battery, gas generated by decomposition ...

AI Technical Summary

Problems solved by technology

[0006] However, in the protector disclosed in Japanese Laid-Open Utility Model No. 64-38764, the fluororesin of the covering area around the perforation to be cracked makes it inconvenient to adjust the tripping pressure to a predetermined value and to provide protection in a narrow width. Predetermined sized perforations in the leads that are required under the recent trend to make rechargeable batteries more compact

In addition, it is difficult to manufacture a guard that releases in a safe manner, since the current collecting leads are originally designed to be broken mechanically, in which case a high tripping pressure should be maintained

[0007] In the case of the protective device disclosed in Japanese laid-open patent 6-36752, it is necessary to equip the hole in the seal with a diaphragm and a membrane, resulting in a complicated structure

With the recent trend towards smaller batteries, this will make it more difficult to fabricate protective devices

In addition, because the diaphragm is designed to be exposed, it appears that possible external disturbances can cause misoperation of the protective device, which eventually leads to overflow of the electrolyte solution under tripping.

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