Control circuit for camera or motor drive device
AssigneeNippon Kogaku K.K.
InventorOsamu Maida
Life of this patent
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Abstract
A circuit for controlling a camera or a motor drive device by means of a control switch unit connected through a pair of connecting terminals thereof to a pair of remote control terminals of said camera or motor drive device, wherein the control switch unit comprises plural control switches and a voltage generating circuit adapted for generating plural different voltages in response to various combinations of the states of said control switches; and said camera or motor drive device comprises plural voltage detecting circuits of different detecting voltages for detecting the voltages supplied to the remote control terminals. The camera or motor drive device is controlled in response to the outputs from said voltage detecting circuits.
Claims6
In a circuit for controlling a camera or a motor drive device by means of a control switch unit connected through a pair of connecting terminals thereof to a pair of remote control terminals of said camera or motor drive device:
- said control switch unit comprises;
- (1) plural control switches and
- (2) a voltage generating circuit adapted for generating plural different voltages in response to various combinations of the states of said control switches:
- and said camera or motor drive device comprises;
- (3) plural voltage detecting circuits of different detecting voltages for detecting the voltages supplied to said remote control terminals, whereby said camera or motor drive device is controlled in response to the outputs from said voltage detecting circuits.
In a remote control unit for a camera or a motor drive device provided with a pair of remote control terminals, a resistor and power source serially connected between said remote control terminals and plural voltage detecting circuits of different detecting voltages for detecting the voltage supplied between said remote control terminals, said remote control unit comprising:
- a pair of connecting terminals to be connected to said pair of remote control terminals:
- and
- plural serial circuits each composed of a switch and resistor means and connected in parallel between said pair of connecting terminals;
- said serial circuits being provided in the same number as that of said voltage detecting circuits, and the resistance of said resistor means being so selected that the voltage generated across said remote control terminals upon closure of the corresponding switch is determined in response to said switch and corresponding to a detecting voltage of one of said plural voltage detecting circuits.
Dependencies are inferred from the claim text.