Patent
Camera
| العنوان: | Camera |
|---|---|
| Patent Number: | 5,293,192 |
| تاريخ النشر: | March 08, 1994 |
| Appl. No: | 07/999,108 |
| Application Filed: | December 31, 1992 |
| مستخلص: | A camera of the present invention comprises a stationary frame adjustable in position with respect to a camera body in the direction of an optical axis; a cam frame disposed around an outer circumference of the stationary frame to be rotatable about the optical axis and movable in a direction of the optical axis with respect to the stationary frame; a finder optical system provided on the camera body; and a finder optical system driving cam provided integrally with the cam frame for driving the finder optical system. In-focus position adjustment of a photographing optical system of the camera is performed during assembly by moving only the stationary frame in the direction of the optical axis, while the cam frame is kept immobile with respect to the camera body. |
| Inventors: | Akitake, Hiroshi (Sagamihara, JPX); Satoh, Kazuhiro (Sagamihara, JPX); Hayashi, Shigeo (Okaya, JPX) |
| Assignees: | Olympus Optical Co., Ltd. (Tokyo, JPX) |
| Claim: | What is claimed is |
| Claim: | 1. A camera comprising |
| Claim: | a stationary frame adjustable in position with respect to a camera body in a direction of an optical axis; |
| Claim: | a cam frame disposed around an outer circumference of said stationary frame to be rotatable about the optical axis and movable in a direction of the optical axis with respect to said stationary frame; |
| Claim: | a finder optical system provided on said camera body; and |
| Claim: | a finder optical system driving cam provided integrally with said cam frame for driving said finder optical system |
| Claim: | wherein in-focus position adjustment of a photographing optical system of said camera is performed during assembly by moving only said stationary frame in the direction of the optical axis, while said cam frame is kept immobile with respect to said camera body. |
| Claim: | 2. A camera according to claim 1, wherein positions of said camera body and said stationary frame in the direction of the optical axis are relatively changed by a spacer inserted between said camera body and said stationary frame. |
| Claim: | 3. A camera according to claim 2, wherein said spacer is a circular ring shape. |
| Claim: | 4. A camera according to claim 1, wherein said finder optical system driving cam is formed integrally with an outer circumference of said cam frame. |
| Claim: | 5. A camera according to claim 1, wherein said finder optical system driving cam and said cam frame are simultaneously formed together as one piece. |
| Claim: | 6. A camera according to claim 1, wherein said stationary frame is moved back and forth during assembly under a condition that said stationary frame is prevented from rotating about the optical axis. |
| Claim: | 7. A camera according to claim 1, wherein said stationary frame is formed with a cam groove inclined relative to the optical axis and said cam frame is formed with a cam groove extending in a direction of the optical axis. |
| Claim: | 8. A camera comprising |
| Claim: | a stationary frame adjustable in position with respect to a camera body in the direction of an optical axis, and formed with a cam groove inclined relative to the optical axis; |
| Claim: | a cam frame disposed around an outer circumference of said stationary frame to be rotatable about the optical axis and movable in the direction of the optical axis with respect to said stationary frame, and formed with a cam groove extending in the direction of the optical axis; |
| Claim: | a photographing optical system holding frame provided with a cam follower to be fitted in said cam grooves of said stationary frame and said cam frame; |
| Claim: | 9. A camera comprising |
| Claim: | a stationary frame formed with a cam groove inclined relative to an optical axis; |
| Claim: | a cam frame rotatable about the optical axis with respect to said stationary frame, and formed with a cam groove extending in the direction of the optical axis; |
| Claim: | a photographing optical system holding frame driven to move back and forth in the direction of the optical axis through said cam grooves of said stationary frame and said cam frame; |
| Claim: | wherein in-focus position adjustment of a photographing optical system of said camera is performed during assembly by moving only said stationary frame in a direction of the optical axis, while said cam frame is kept immobile with respect to said camera body. |
| Claim: | 10. A camera comprising |
| Claim: | a stationary frame supported to be adjustable in position with respect to a camera body in a direction of an optical axis; |
| Claim: | a cam frame disposed around said stationary frame to be capable of behavior other than movement in the direction of the optical axis and movable in a direction of the optical axis; |
| Claim: | another unit fixed to said camera body; and |
| Claim: | a drive cam provided integrally with said cam frame for driving said another unit |
| Claim: | wherein a position of said cam frame in the direction of the optical axis is restricted by said another unit irrespective of a position of said stationary frame in the direction of the optical axis. |
| Claim: | 11. A camera according to claim 10, wherein said another unit is a zoom finder unit. |
| Claim: | 12. A camera according to claim 10, wherein said another unit is a zoom flash unit. |
| Claim: | 13. A camera comprising |
| Claim: | a cam frame disposed around said stationary frame to be rotatable about the optical direction and movable in a direction of the optical axis; |
| Claim: | a drive cam provided integrally with said frame for driving said another unit |
| Claim: | 14. A camera according to claim 13, wherein said another unit is a zoom finder unit. |
| Claim: | 15. A camera according to claim 13, wherein said another unit is a zoom flash unit. |
| Claim: | 16. A camera comprising |
| Claim: | a finder frame member fixed to a stationary member of a camera body for holding a finder optical system; |
| Claim: | a lock member projecting from said finder frame member; |
| Claim: | a stationary frame fixed to the stationary member of said camera body and serving as a reference of a holder frame for holding a photographing optical system; and |
| Claim: | a cam frame fitted over an outer circumference of said stationary frame and moving said holder frame in the direction of an optical axis in cooperation with said stationary frame |
| Claim: | wherein said cam frame has cam means for moving a finder optical system synchronously with movement of said photographing optical system in a direction of the optical axis, and movement of said cam frame in a direction of the optical axis is restricted by a member which is immovable with respect to said camera body. |
| Claim: | 17. A camera according to claim 16, wherein said member which is immovable with respect to said camera body is the lock member of said finder frame member. |
| Claim: | 18. A camera comprising |
| Claim: | a finder optical system holding system fixed to a stationary member of a camera body for supporting a finder optical system; |
| Claim: | a stationary frame fixed to the stationary member of said camera body for supporting a photographing optical system; |
| Claim: | a cam frame rotatable fitted over said stationary frame; and |
| Claim: | lock means provided between said finder optical holding system and said cam frame |
| Claim: | wherein said lock means restricts movement of said cam frame in the direction of the optical axis with respect to said finder optical system holding member, but allows said cam frame to rotate with respect to said stationary frame. |
| Claim: | 19. A camera wherein a positioning member provided on a finder optical system holding member, which positions a finder optical system with respect to a stationary member of a camera body, restricts movement of a cam frame fitted over a stationary frame in a thrust direction of said cam frame. |
| Claim: | 20. A camera having a zoom lens and a zoom finder, said camera comprising |
| Claim: | a stationary frame supporting at least one movable frame; |
| Claim: | a cam ring for moving said movable frame in a direction of an optical axis for zooming operation; |
| Claim: | said zoom finder having a finder stationary frame which is fixed to a camera body and formed with a projection, and also having at least one movable lens which is moved for zooming operation of said finder; and |
| Claim: | a finder cam ring rotatable together with said cam ring |
| Claim: | wherein said movable lens is fitted to said finder cam ring so that said finder performs zooming operation with rotation of said finder cam ring, and a circumferential groove is formed in said cam ring to be engaged with said projection for prohibiting movement of said finder cam ring in a direction of the optical axis, while allowing said finder cam ring to rotate about the optical axis, and |
| Claim: | a zooming condition of said finder is not changed even when said stationary frame is moved in the direction of the optical axis for adjusting a back focus of said movable zoom lens. |
| Claim: | 21. A camera having a zoom lens and a zoom finder, said camera comprising |
| Claim: | a photographing optical system having a variable focal length; |
| Claim: | a finder optical system having an image magnification variable in conjunction with the focal length of said photographing optical system; |
| Claim: | interlock means for interlocking said photographing optical system and said finder optical system; |
| Claim: | adjusting means for adjusting a back focus of said photographing optical system; and |
| Claim: | image magnification change preventing means by which no change is imparted to the image magnification of said finder optical system when the back focus of said photographing optical system is adjusted by said adjusting means, and which eliminates a need of adjusting a back focus of said photographing optical system even after the adjustment of said photographing optical system. |
| Claim: | 22. A camera according to claim 21, wherein said image magnification change preventing means comprises a projection formed on said finder stationary frame and a circumferential groove formed in said interlock means circumferentially about an optical axis, said projection and said circumferential groove being engaged with each other. |
| Claim: | 23. A camera according to claim 21, wherein said interlock means comprises cam means for controlling movement of a movable lens in said finder optical system. |
| Claim: | 24. A method for adjusting a camera during assembly thereof, said camera comprising |
| Claim: | a finder optical system driving cam provided integrally with said cam frame for driving said finder optical system, said method comprising the steps of |
| Claim: | adjusting the in-focus position of a photographing optical system operated by said cam frame and said stationary frame during assembly of the camera by moving only said stationary frame in the direction of the optical axis to achieve an in-focus position; and |
| Claim: | maintaining said cam frame immobile with respect to said camera body as said in-focus position adjustment is being performed. |
| Claim: | 25. The method of claim 24 wherein the step of making the in-focus adjustment further comprises inserting a spacer between said camera body and said stationary frame to maintain the in-focus adjustment. |
| Claim: | 26. The method of claim 24 wherein said camera photographing optical system is comprised of first, second and third lens groups, one of said lens group being adjustable relative to a cam follower provided as part of said lens group, which cam follower is driven by said stationary frame and said cam frame, said method further comprising the step of |
| Claim: | adjusting a displacement at said third lens group relative to its cam follower in the optical axis direction to change the position of the third lens group with respect to the first and second lens groups to reduce a difference in an adjustment amount between a wide angle state and a telephoto state so as to maintain the difference to be smaller than a predetermined value. |
| Current U.S. Class: | 354/219; 35419/512; 354/286; 359/695; 359/700; 359/701 |
| Current International Class: | G03B 1302 |
| Patent References Cited: | 4281907 August 1981 Kamata 4945372 March 1990 Higuchi et al. |
| Primary Examiner: | Hayes, Monroe H. |
| Attorney, Agent or Firm: | Weinstein, Louis |
| رقم الانضمام: | edspgr.05293192 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |