Wind-up device for camera

• US 4,466,719 A
• Filed: 05/16/1983
• Issued: 08/21/1984
• Est. Priority Date: 08/28/1980
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Yoshikawa, Ryoichi, Shigeta, Yoshihiro, Haraguchi, Shosuke, Uchidoi, Masanori, Tosaka, Yoichi
• Primary Examiner(s): Perkey, William B.
• Application Number:
  US06/494,628
• Time in Patent Office: 463 Days
• Field of Search: 354/173.1, 354/173.11, 354/204-206, 354/212-214, 242/71.5, 242/71.6, 355/48
• US Class Current: 396/409
• CPC Class Codes: G03B 17/425 motor drive cameras

Abstract

A camera which is provided with a motor for driving a wind-up mechanism to perform film feeding and shutter charging and which is arranged to have photographing actions carried out one after another upon completion of the film feeding and shutter charging, a wind-up device has a switch which is arranged to force the wind-up mechanism into completing the winding up action thereof by means of the motor in response to depression of a rewinding button.

Claims

1. A wind-up device for a camera, comprising:

driving means for effecting film winding and shutter charging;

control means for controlling the driving action of said driving means, said control means being arranged to bring said driving means into a driving state when a first signal is applied thereto and to render the driving means incapable of driving when a second signal is applied;

first signal generating means for producing said first signal upon completion of an exposure effecting operation;

second signal generating means for producing said second signal upon completion of a winding operation;

switch means for causing said first signal generating means to produce the first signal therefrom irrespective of completion of the exposure effecting operation; and

operation means for causing said switching means to perform the switching action thereof.

2. A device according to claim 1, wherein said operation means is a rewinding button.

3. A device according to claim 2, further including:

a sprocket for film winding, said sprocket being provided with a clutch operated by a driving force of said driving means either to permit or to inhibit said film winding, said clutch being interlocked with said rewinding button to inhibit said film winding in response to an operation on the rewinding button.

4. A device according to claim 1, wherein said driving means is a motor.

5. A wind-up device for a camera, comprising:

a wind-up mechanism arranged to perform film winding and shutter charging;

driving means for driving said wind-up mechanism;

a sprocket operated by said wind-up mechanism for performing film winding, said sprocket being provided with a clutch for transmission of or releasing the transmission of the operation of said wind-up mechanism;

a rewinding operation member which releases the transmission by said clutch when operated;

control means for controlling the driving action of said driving means, said control means being arranged to bring the driving means into a driving state when a first signal is applied thereto and to render the driving means incapable of driving when a second signal is applied;

first signal generating means for producing said first signal upon completion of an exposure effecting operation;

second signal generating means for producing said second signal upon completion of a winding operation; and

switch means for causing said first signal generating means to produce the first signal therefrom irrespective of completion of the exposure effecting operation, said switch means being arranged to be caused to perform the switching action thereof by said rewinding operation member.

6. A device according to claim 5, wherein said first signal generating means is provided with a switch for detecting completion of a shutter operation.

7. A device according to claim 6, wherein said first signal generating means is provided with gate means which has said switch and said switch means connected to the input terminals thereof.

8. A device according to claim 5, wherein said first signal generating means and said second signal generating means are provided with a common Flip-Flop.