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US4598989A
Expired / Lapsed
US
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Camera
Assignee: Konica Minolta Inc
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Filing: 1983-12-22
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Granted: 1986-07-08
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Expires: 2003-12-22
Abstract
Abstract An automatic focusing camera comprising: a distance measuring means, a cylindrical permanent magnet means which is provided fixedly inside of the lens barrel, a cylindrical moving coil member which is concentric with said cylindrical permanent means, a lens unit which is driven together with the cylindrical moving coil member, and a spring for urging said lens unit to the most frequently employed focusing point of its travelling range, wherein the lens unit is adapted to move to a point corresponding to an output signal from the distance measuring means under the influence of the cylindrical moving coil member.
Inventors
- 👤 Minoru Yamada
- 👤 Eiji Ito
- 👤 Masaru Nagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:18
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
105 words
An automatic focusing camera comprising: a distance measuring means, a photographic lens-driving device having a cylindrical permanent magnet means which is provided fixedly inside of a lens barrel and a cylindrical moving coil member which is concentric with said cylindrical permanent means, a lens unit which is driven together with said cylindrical moving coil member, and a spring means for urging said lens unit to the most frequently employed focusing point of its traveling range, wherein said lens unit is adapted to move to a point corresponding to an output signal from said distance measuring means under the influence of said cylindrical moving coil member.
Claim 2
Dependent Claim
105 words
An automatic focusing camera comprising: a distance measuring means, a photographic lens-driving device having a cylindrical permanent magnet means which is provided fixedly inside of a lens barrel and a cylindrical moving coil member which is concentric with said cylindrical permanent means, a lens unit which is driven together with said cylindrical moving coil member, and a spring means for urging said lens unit to the most frequently employed focusing point of its traveling range, wherein said lens unit is adapted to move to a point corresponding to an output signal from said distance measuring means under the influence of said cylindrical moving coil member.
Claim 3
Dependent Claim
47 words
The camera according to claim 1 wherein said cylindrical permanet magnet means comprises two cylindrical permanet magnets fixed by inner and outer holding cylinders so that opposite poles face each other, said cylindrical moving coil member fitting loosely between said fixed permanent magnets in the lens-driving device.
Claim 4
Dependent Claim
27 words
A camera according to claim 2, wherein the most frequently employed focusing point is provided at the middle point of the traveling range of the lens unit.
Claim 5
Dependent Claim
36 words
The camera according to claim 1 wherein aforesaid lens unit comprises a photographing lens, a lens holder ring holding said photographing lens and an electro-magnetic driving device containing disc-shaped coil members for controlling the exposure amount.
Claim 6
Dependent Claim
44 words
The camera according to claim 4 wherein said electro-magnetic driving device comprises fixed permanent magnets, a holding frame for holding said permanent magnets, and yokes that engage with said permanent magnets of said electro-magnetic driving device, said yokes linked to the photographic lens-driving device.
Claim 7
Dependent Claim
46 words
The camera according to claim 5 wherein the electro-magnetic driving device is characterized in that a holding frame for fixed permanent magnets to be used for aforesaid electro-magnetic driving device and said photographing lens holder ring are formed in one body and made of non-magnetic material.
Claim 8
Dependent Claim
44 words
The camera according to claim 5 wherein the camera is a between-lens-shutter camera characterized in that aforesaid photographing lens holder ring comprises a front group lens holder ring and a rear group lens holder ring and an electro-magnetic driving device is provided between them.
Claim 9
Dependent Claim
53 words
The camera according to claim 7 comprising a connecting means wherein the front group lens holder ring and the rear group lens holder ring are connected by means of a linking member that engages with the yokes retained by the attracting force of the fixed permanent magnets used in the electro-magnetic driving device.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |