Information transmitting device for camera
AssigneeCanon Kabushiki Kaisha
InventorsAkira Yamada, Ichiro Ohnuki
Life of this patent
Estimating the term…
Abstract
An information transmitting device between a camera body and an interchangeable objective therefor. An electrical circuit related to AF control in the camera body is fabricated in a flexible printed circuit board on back surface of a front panel of the camera housing to provide it in the unified form with the front panel. Information input and output pins for the circuit are positioned in the margin of an opening of the lens mount and on the front surface of the panel. A CPU chip is carried on an adjacent wing portion of the front panel to the pins and connected to the latter.
Claims10
An information transmitting device for a camera body incorporated with a detachable front panel construction unifying therein a focal detection device including an AF optical system and a light sensor, comprising:
- (a) a circuit for AF control in said camera body;
- (b) a circuit for camera sequence control other than said AF control in said camera body;
- (c) a flexible printed circuit board having said circuit for AF control fabricated therein, said board being mounted on a wing portion of said front panel construction;
- (d) camera side signal transmitting pins electrically connected to circuit patterns on said flexible printed circuit board, said pins being arranged, upon attachment of a photographic lens to said camera body, to contact with signal transmitting pins of said photographic lens, so that electrical signals related to the AF control are transmitted therebetween;
- and
- (e) a large size chip element electrically connected to said flexible printed circuit board and substantially rigidly held in said wing portion in said front panel construction, said large size chip element overlapping with said wing portion and having a connection terminal formed on both sides to connect said board.
An information transmitting device for a camera body incorporated with a detachable front panel construction unifying therein a focal detection device including an AF optical system and a light sensor, comprising:
- (a) a circuit for AF control in said camera body;
- (b) a circuit for camera sequence control other than said AF control in said camera body;
- (c) a flexible printed circuit board having said circuit for AF control fabricated therein, said board being mounted on a wing portion of said front panel construction;
- (d) camera side signal transmitting pins electrically connected to circuit patterns on said flexible printed circuit board, said pins being arranged, upon attachment of a photographic lens to said camera body, to contact with signal transmitting pins of said photographic lens, so that electrical signals related to the AF control are transmitted therebetween;
- and
- (e) a large size chip element electrically connected to said flexible printed circuit board and substantially rigidly held in said wing portion in said front panel construction, said large size chip element overlapping with said wing portion and having a connection terminal formed on both sides to coneect said board, wherein said front panel construction is formed by an electrically conductive member, and is electrically connected to circuit ground.
An information transmitting device for a camera comprising:
- (a) a camera body having a focus detecting device including a light sensor incorporated therein;
- (b) a first photographic lens having a focus detecting device including a light sensor incorporated therein;
- (c) a second photographic lens having no focus detecting device including a light sensor incorporated therein;
- (d) first lens side signal transmitting pins arrange in said first photographic lens;
- (e) second lens side signal transmitting pins arranged in said second photographic lens;
- and
- (f) a plurality of camera side signal transmitting pins arranged almost in a row in said camera body, said camera side signal transmitting pins having a first pin arrangement for connection with said first lens side signal transmitting pins, and a second pin arrangement for connection with said second side signal transmitting pins, both of said pin arrangments having common transmitting pins for duplicated signals, and said common transmitting pins being grouped in one set and arranged to one side.
Dependencies are inferred from the claim text.