Patent US4769664A successfully refreshed from Google Patents.
US4769664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barrel driving device for camera
Assignee: Canon Inc
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Filing: 1987-04-27
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Granted: 1988-09-06
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Expires: 2007-04-27
Abstract
Abstract A barrel driving device for a camera including a distance adjusting ring having cam portions for axially moving a photographic lens barrel forward, ratchet teeth formed in the outer periphery of the distance adjusting ring, a ratchet arranged upon movement from an initial or first position to a second position to turn the distance adjusting ring in engagement with one of the ratchet teeth, and a pawl arranged upon engagement with one of the ratchet teeth to hinder the reverse movement of the distance adjusting ring, wherein there is provided a limiting member having an abutment surface against which the head of the ratchet abuts so that the ratchet is hindered from turning outwardly of the distance adjusting ring when it goes in the second position.
Inventors
- 👤 Akihiro Namai
- 👤 Akira Egawa
- 👤 Takanori Kodaira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:11
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/08
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
105 words
A barrel driving device for a camera comprising: (a) an axially movable photographic lens barrel; (b) moving means for axially moving said photographic lens barrel, said moving means having ratchet teeth and being movable; (c) an advancing member arranged in engagement with said tatchet teeth to move said moving means; (d) elastic means for engaging said ratchet teet advancing member; (e) a pawl member arranged upon engagement with said ratchet teeth to hinder the reverse movement of said moving means; (f) a limiting member for preventing said advancing means for moving said moving means more than a predetermined amount against elasticity of said elastic means.
Claim 2
Dependent Claim
105 words
A barrel driving device for a camera comprising: (a) an axially movable photographic lens barrel; (b) moving means for axially moving said photographic lens barrel, said moving means having ratchet teeth and being movable; (c) an advancing member arranged in engagement with said tatchet teeth to move said moving means; (d) elastic means for engaging said ratchet teet advancing member; (e) a pawl member arranged upon engagement with said ratchet teeth to hinder the reverse movement of said moving means; (f) a limiting member for preventing said advancing means for moving said moving means more than a predetermined amount against elasticity of said elastic means.
Claim 3
Dependent Claim
25 words
A device according to claim 1, wherein said limiting member has a slant surface such as to direct said advancing member toward said moving means.
Claim 4
Dependent Claim
124 words
A barrel driving device for a camera comprising: (a) an axially movable photographic lens barrel; (b) moving means for axially moving said photographic lens barrel, said moving means having first ratchet teeth and second ratchet teeth whose tooth direction is opposite to that of said first ratchet teeth, and being movable; (c) an advancing member arranged in engagement with said first ratchet teeth to move said moving means; (d) a first pawl member arranged upon engagement with said first ratchet teeth to hinder the reverse movement of said moving means; and (e) a second pawl member arranged upon engagement with said second ratchet teeth to prohibit movement of said moving means more than necessary, said second pawl member operating as said advancing member moves.
Claim 5
Dependent Claim
124 words
A barrel driving device for a camera comprising: (a) an axially movable photographic lens barrel; (b) moving means for axially moving said photographic lens barrel, said moving means having first ratchet teeth and second ratchet teeth whose tooth direction is opposite to that of said first ratchet teeth, and being movable; (c) an advancing member arranged in engagement with said first ratchet teeth to move said moving means; (d) a first pawl member arranged upon engagement with said first ratchet teeth to hinder the reverse movement of said moving means; and (e) a second pawl member arranged upon engagement with said second ratchet teeth to prohibit movement of said moving means more than necessary, said second pawl member operating as said advancing member moves.
Claim 6
Dependent Claim
25 words
A device according to claim 3, wherein said moving means is a distance adjusting ring arranged on the outer periphery of said photographic lens barrel.
Claim 7
Dependent Claim
31 words
A device according to claim 4, wherein said first ratchet teeth and said second ratchet teeth are arranged on the outer periphery of said distance adjusting ring side in stepped relation.
Claim 8
Dependent Claim
79 words
A driving device for camera optics of a camera comprising: (a) moving means for displacing said camera optics; (b) driving means for driving said moving means, said driving means engaging with said moving means so as to transmit a driving force to said moving means; (c) elastic means for engaging said moving means with said driving means; and (d) limiting means for prohibiting said moving means from operating beyond a predetermined amount against the strength of said elastic means.
Claim 9
Dependent Claim
79 words
A driving device for camera optics of a camera comprising: (a) moving means for displacing said camera optics; (b) driving means for driving said moving means, said driving means engaging with said moving means so as to transmit a driving force to said moving means; (c) elastic means for engaging said moving means with said driving means; and (d) limiting means for prohibiting said moving means from operating beyond a predetermined amount against the strength of said elastic means.
Claim 10
Dependent Claim
29 words
A device according to claim 6, further comprising: a lens barrel displacing out of a first position into a second position in response to movement of said moving means.
Claim 11
Dependent Claim
19 words
A device according to claim 7, further comprising: urging means for returning said lens barrel to said first position.
Claim 12
Dependent Claim
27 words
A device according to claim 8, further comprising prohibiting means for prohibiting said lens barrel from returning to said first position by means of said urging means.
Claim 13
Dependent Claim
38 words
A device according to claim 9, further comprising: returning means for returning said lens barrel to said first position by means of said urging means in response to the arrival of said lens barrel to said second position.
Claim 14
Dependent Claim
33 words
A device according to claim 9, wherein said limiting means includes prohibiting means for prohibiting said driving means from displacing in a direction along which said driving means disengages from said moving means.
Claim 15
Dependent Claim
33 words
A device according to claim 11, wherein said prohibiting means includes a slant surface prohibiting said driving means from displacing in a direction along which said driving means disengages from said moving means.
Claim 16
Dependent Claim
33 words
A device according to claim 6, wherein said limiting means includes prohibiting means for prohibiting said driving means from displacing in a direction along which said driving means disengages from said moving means.
Claim 17
Dependent Claim
33 words
A device according to claim 13, wherein said prohibiting means includes a slant surface prohibiting said driving means for displacing in a direction along which said driving means disengages from said moving means.
Claim 18
Dependent Claim
19 words
A device according to claim 9, wherein said limiting means includes an engaging member engaging with said moving means.
Claim 19
Dependent Claim
23 words
A device according to claim 15, wherein said engaging member is designed so as to operate in operative engagement with said driving means.
Claim 20
Dependent Claim
19 words
A device according to claim 6, wherein said limiting means includes an engaging member engaging with said moving means.
Claim 21
Dependent Claim
23 words
A device according to claim 17, wherein said engaging member is designed so as to operate in operative engagement with said driving means.
Claim 22
Dependent Claim
46 words
A device according to claim 6, wherein said driving means includes electromagnetic means which drives said moving means by rotating along a first direction out of a standard position and carries out an exposure operation by rotating toward a second position out of said standard position.
Claim 23
Dependent Claim
14 words
A device according to claim 19, wherein said moving means includes focus adjusting means.
Claim 24
Dependent Claim
97 words
A driving device for camera optics of a camera comprising: (a) moving means for displacing said camera optics by movement, said moving means including a ratchet; (b) feeding means engaging with said ratchet so as to move said moving means along a certain predetermined direction, said feeding means moving said moving means along said predetermined direction step by step by carrying out reciprocating motion; (c) elastic means for engaging said feeding means with said ratchet; and (d) limiting means for prohibiting said moving means from moving beyond a predetermined position against the strength of said elastic means.
Claim 25
Dependent Claim
97 words
A driving device for camera optics of a camera comprising: (a) moving means for displacing said camera optics by movement, said moving means including a ratchet; (b) feeding means engaging with said ratchet so as to move said moving means along a certain predetermined direction, said feeding means moving said moving means along said predetermined direction step by step by carrying out reciprocating motion; (c) elastic means for engaging said feeding means with said ratchet; and (d) limiting means for prohibiting said moving means from moving beyond a predetermined position against the strength of said elastic means.
Claim 26
Dependent Claim
33 words
A device according to claim 21, wherein said limiting means includes prohibiting means for prohibiting said driving means from displacing in a direction along which said driving means disengages from said moving means.
Claim 27
Dependent Claim
19 words
A device according to claim 22, wherein said limiting means includes an engaging member engaging with said moving means.
Claim 28
Dependent Claim
41 words
A device according to claim 23, wherein said engaging member is designed so as to stop after having moved along said predetermined direction accompanying said moving means and to disengage from said moving means in operative engagement with said driving means.
References Cited (Backward Citations)
US2900840A
Cited
US4560266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |