Electricity: electrical systems and devices – Discharging or preventing accumulation of electric charge
Patent
1991-09-16
1995-03-07
Pellinen, A. D.
Electricity: electrical systems and devices
Discharging or preventing accumulation of electric charge
361214, 361220, 200 6162, 200 6181, 200 50A, H01H 316, H05F 302
Patent
active
053963962
ABSTRACT:
An electronic apparatus which is placed in an operation wait state by fully closing a cover having an electrical component, and a method for grounding the electronic apparatus is disclosed. The apparatus includes a cover side contact element electrically connected to the electrical component, and a body side contact element electrically connected to a grounding member of the apparatus. Both contact elements are brought into contact with each other so as to electrically connect the electrical component with the grounding member of the apparatus when the cover is fully closed. Thus, grounding of the electrical component can be insured without using a conductive wire for connecting the electrical component with the grounding member of the apparatus. Furthermore, a misfunction of the electrical component caused by an electrostatic charge is prevented while reducing a troublesome assembly work of the apparatus and the number of components. In addition, since the apparatus includes a switch comprising a displacement element provided on at least one of the two contact elements, the opened and closed positions of the cover can be detected in response to a displacement of the displacement element. Thus, an exclusive switching unit such as a microswitch and an operational member for actuating an actuator of the switching unit are not required. The apparatus can therefore detect a full closed position of the cover without increasing the number of components and the overall size of the apparatus. Furthermore, a misoperation by an operator and a misfunction of the apparatus can be prevented.
REFERENCES:
patent: 4163939 (1979-08-01), Halstead et al.
patent: 4760492 (1988-07-01), Walsh
Pavey, N. K.; IBM Technical Disclosure Bulletin; vol. 21, No. 4, Sep. 1978; "Mechanical/Electrical Cover Latch".
Fleming Fritz M.
Kabushiki Kaisha Toshiba
Pellinen A. D.
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