Patent US4887114A successfully refreshed from Google Patents.
US4887114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back-cover release device for a camera
Assignee: Pentax Corp
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Filing: 1989-03-08
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Granted: 1989-12-12
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Expires: 2009-03-08
Abstract
Abstract A release device for unlocking the back-cover of a camera includes a back-cover lock member urged in a direction to lock the back-cover, an operating lever pivotally disposed along a side of the camera and operable externally of the camera so as to be angularly displaced therefrom and an interlocking plate for interlocking the operating lever with the back-cover lock member. The operating lever is engageable with the interlocking plate after the operating lever is angularly rotated through a predetermined preliminary angle in an opening direction from a position where the operating lever is disposed along the camera body so as to displace the interlocking plate and to correspondingly displace the lock member to thereby unlock the back-cover. The interlocking plate is interlocked with a film rewind shaft so as to move the film rewind shaft in a direction to disengage the shaft from a film cartridge in accordance with the movement of the back-cover lock member to its unlocked position when the operating lever has been rotated beyond the predetermined preliminary angle.
Inventors
- 👤 Masato Yamamoto
- 👤 Masahiro Nakajima
- 👤 Toshimasa Yamanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:35
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B2217/00; G03B2217/26; G03B2217/268
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A back-cover release device for unlocking a back-cover of a camera, comprising: a back-cover lock member urged in a direction to lock the back-cover; an operating lever pivotably disposed along a side of said camera and operable externally of the camera so as to be angularly displaced therefrom; and an interlocking plate for interlocking the operating lever with the back-cover lock member, the operating lever being engageable with the interlocking plate after the operating lever is angularly rotated through a predetermined preliminary angle in an opening direction from a position where the operating lever is disposed along the camera body so as to displace said interlocking plate and to correspondingly displace said lock member to unlock said back-cover.
Claim 2
Dependent Claim
118 words
A back-cover release device for unlocking a back-cover of a camera, comprising: a back-cover lock member urged in a direction to lock the back-cover; an operating lever pivotably disposed along a side of said camera and operable externally of the camera so as to be angularly displaced therefrom; and an interlocking plate for interlocking the operating lever with the back-cover lock member, the operating lever being engageable with the interlocking plate after the operating lever is angularly rotated through a predetermined preliminary angle in an opening direction from a position where the operating lever is disposed along the camera body so as to displace said interlocking plate and to correspondingly displace said lock member to unlock said back-cover.
Claim 3
Dependent Claim
56 words
A back-cover release device for a camera according to claim 1, in which the interlocking plate is interlocked with a film rewind shaft so as to move the film rewind shaft in a direction to disengage said shaft from a film cartridge in accordance with the movement of the back-cover lock member to its unlocked position.
Claim 4
Dependent Claim
105 words
A back-cover release device for unlocking a back-cover of a camera, comprising: a back-cover lock member urged in a direction to lock the back-cover; and an operating lever which is pivotally disposed along a side of a camera body and operable externally of the camera so as to be angularly displaced therefrom, the operating lever being engageable with a portion of said back-cover lock member after the operating lever is angularly moved through a predetermined preliminary angle in an opening direction from a position where the operating member is disposed along the camera body so as to move said lock member in the unlocking direction.
Claim 5
Dependent Claim
105 words
A back-cover release device for unlocking a back-cover of a camera, comprising: a back-cover lock member urged in a direction to lock the back-cover; and an operating lever which is pivotally disposed along a side of a camera body and operable externally of the camera so as to be angularly displaced therefrom, the operating lever being engageable with a portion of said back-cover lock member after the operating lever is angularly moved through a predetermined preliminary angle in an opening direction from a position where the operating member is disposed along the camera body so as to move said lock member in the unlocking direction.
Claim 6
Dependent Claim
79 words
A back-cover release device for a camera according to claim 3, further comprising an interlocking plate to which the back-cover lock member is interlocked, said interlocking plate being correspondingly interlocked with a film rewind shaft, wherein when said operating lever is rotated beyond said preliminary angle, said interlocking member moves said film rewind shaft in a direction to disengage said shaft from a film cartridge in accordance with the movement of said back-cover lock member to its unlocked position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |