Power source device
AssigneeCanon Kabushiki Kaisha
InventorsShinji Sakai, Ryosuke Miyamoto
Life of this patent
Estimating the term…
Abstract
A power source system including a power source device and an external device connected to said power source device, in which the connection between the power source device with the external device is firstly confirmed, then the power is supplied from the power source device to the external device when a predetermined output of said power source device has been obtained, while a first signal is transmitted from said power source device to the external device connected thereto, and the supply of power is stopped if a predetermined signal is not fed from said external device.
Claims158
A system consisting of a combination of a power source device and an external device detachably connected to said power source device, comprising:
- (A) the power source device including
- (a) power supply means for supplying power according to the connection of said power source device with said external device, and
- (b) control means for transmitting a first signal to said external device after starting the supply of power to said external device and then stopping the supply of power of said power supply means if a predetermined signal from said external device is not detected;
- and
- (B) the external device including
- (a) a first terminal for receiving the power supplied from said power supply means, and
- (b) means for transmitting said predetermined signal when said first signal is transmitted.
A power source device which can be detachably connected to an external device, comprising:
- (a) power supply means for supplying power to said external device, depending upon the connection of said external device with said power source device;
- and
- (b) control means for transmitting a first signal to said external device after starting the supply of power to said external device and then stopping the supply of power of said power supply means if a predetermined signal from said external device is not detected.
A camera system, including a combination of a camera body and an accessory unit, comprising:
- (A) the camera body including
- (a) power supply means for supplying power according to the connection of said accessory unit to said camera body, and
- (b) control means for transmitting a first signal to said accessory unit after starting the supply of power to said accessory unit and then stopping the supply of power effected by said power supply means if a predetermined signal from said accessory unit is not detected;
- and
- (B) the accessory unit including
- (a) a terminal for receiving power supplied from said power supply means, and
- (b) means for transmitting said predetermined signal when said first signal is transmitted.
A camera body which supplies power to an accessory unit which can be detachably mounted on the camera body, comprising:
- (a) power supply means for supplying power according to the connection of said accessory unit to said camera body;
- and
- (b) control means for transmitting a first signal to said accessory unit after starting the supply of power to said accessory unit and then stopping the supply of power effected by said power supply means if a predetermined signal from said accessory unit is not detected.
A camera body according to claim 51, further comprising:
- (a) a first terminal for supplying power to said external device by said power supply means;
- and
- (b) a second terminal for transmitting said first signal to said external device.
A system consisting of a combination of an electrical power source device and an external device including electro-mechanical energy conversion means, detachably connected to said power source device, comprising:
- (A) the electrical power source device including
- (a) electrical power supply means for supplying electrical power after the connection of said power source device with said external device, and
- (b) control means for transmitting a first signal to said external device after starting electrical supply to said external device and then controlling said power supply means such that said electro-mechanical energy conversion means does not operate if a predetermined signal from said external device is not detected;
- and
- (B) the external device including
- (a) means for receiving power supplied from said electrical power supply means,
- (b) means for transmitting said predetermined signal when said first signal is transmitted, and
- (c) said electro-mechanical energy conversion means for converting electrical power received by said receiving means to mechanical power.
A power source device, which can be detachably connected to an external device including electro-mechanical energy conversion means, comprising:
- (a) electrical power supply means for supplying electrical power to said external device, after the connection of said external device with said power source device;
- and
- (b) control means for transmitting a first signal to said external device after starting an electrical supply to said external device and then controlling said power supply means such that said electro-mechanical energy conversion means does not operate if a predetermined signal from said external device is not detected.
An external device which can be detachably connected to a power source device including power supply means, means for transmitting a firtt signal after starting an electrical supply and then controlling said power supply by said power supply means if a predetermined signal from said external device is not detected, comprising:
- (a) means for receiving power supplied from said power supply means;
- (b) means for transmitting said predetermined signal when said first signal is transmitted;
- and
- (c) electro-mechanical energy conversion means for converting electrical power received by said receiving means to mechanical power.
A camera system including combination of a camera body and an accessory unit including electro-mechanical energy conversion means, comprising:
- (A) the camera body including
- (a) electrical power supply means for supplying electrical power after the connection of said accessory unit to said camera body, and
- (b) control means for transmitting a first signal to said accessory unit after starting an electrical supply to said accessory unit, and then controlling a power supply effected by said power supply means such that said electro-mechanical energy conversion means does not operate if a predetermined signal from said accessory unit is not detected;
- and
- (B) the accessory unit including
- (a) means for receiving power supply from said electrical power supply means,
- (b) means for transmitting said predetermined signal when said first signal is transmitted, and
- (c) said electro-mechanical energy conversion means including diaphragm drive unit for converting electrical power received by said receiving means to mechanical power.
A camera system according to claim 99, wherein said accessory unit further includes:
- (a) means for detecting said first signal;
- and
- (b) control means for reading said predetermined signal from said storing means in accordance with the detection effected by said detecting means.
A camera body which supplies electrical power to an accessory unit which can be detachably mounted on the camera body and includes electro-mechanical energy conversion means, comprising:
- (a) electrical power supply means for supplying electrical power after the connection of said accessory unit to said camera body;
- and
- (b) control means for transmitting a first signal to said accessory unit after starting an electrical supply to said accessory unit, and then controlling a power supply effected by said power supply means such that said electro-mechanical energy conversion means does not operate if a predetermined signal from said accessory unit is not detected.
An accessory unit which can be detachably connected to a camera body including power supply means and means for transmitting a first signal after starting an electrical supply, and then controlling a power supply by said power supply means if a predetermined signal from said accessory unit is not detected, comprising:
- (a) means for receiving power supplied from said power supply means;
- (b) means for transmittig a predetermined signal when said first signal is transmitted;
- and
- (c) means for converting electrical power received by said receiving means to mechanical power.
A camera system including a combination of a camera body having power supply means and an accessory unit having connection means which supplies received power from said power supply means to electro-mechanical energy conversion means, comprising:
- (A) the camera body including
- (a) said power supply means for supplying power after the connection of said accessory unit to said camera body;
- and
- (b) control means for transmitting a first signal to said accessory unit after starting an electrical supply to said accessory unit, and then controlling a power supply effected by said power supply means such that said electro-mechanical energy conversion means is disabled if a predetermined signal from said accessory unit is not detected;
- and
- (B) the accessory unit including
- (a) means for receiving power supplied from said power supply means;
- (b) means for transmitting said predetermined signal when said first signal is transmitted;
- and
- (c) said connection means for supplying received power by said receiving means to said electro-mechanical energy conversion means.
A camera body which supplies electrical power to an accessory unit which can be detachably mounted on the camera body and includes connection means which supplies received power to electro-mechanical energy conversion means, comprising:
- (a) power supply means for supplying power after the connection of said accessory unit to said camera body;
- and
- (b) control means for transmitting a first signal to said accessory unit after starting an electrical supply to said accessory unit and then controlling a power supply effected by said power supply means such that said electro-mechanical energy conversion means is disabled if a predetermined signal from said accessory unit is not detected.
An accessory unit which can be detachably connected to a camera body including power supply means and means for transmitting a first signal after starting electrical supply and then controlling a power supply if a predetermined signal from said accessory unit is not detected, comprising:
- (a) a terminal for receiving power supplied from said power supply means;
- (b) means for transmitting said predetermined signal when said first signal is transmitted;
- and
- (c) connection means for supplying power received by said receiving means to electro-mechanical energy conversion means.
Dependencies are inferred from the claim text.