Patent US4638151A successfully refreshed from Google Patents.
US4638151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyboard of an electronic apparatus
Assignee: Canon Inc
•
Filing: 1985-05-17
•
Granted: 1987-01-20
•
Expires: 2005-05-17
Abstract
Abstract A plurality of keytops are held by means of a single leaf spring to prevent erroneous insertion of the keytops into opening portions formed in a frame and to prevent the keytops from being removed from the opening portions. For prevention of unstable movement of the keytops, the leaf spring holding a plurality of keytops is contacts projections formed on the frame to be deformed thereby applying the initial pressure. Further, in order to reduce the number of assembly processes in attaching the leaf spring holding a plurality of keytops to the frame and the number of parts which are attached, each end of the spring portions connected to the plurality of keytops is coupled at a single portion and fixed to the frame.
Inventors
- 👤 Kaname Suwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:52
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/702; H01H13/705; H01H2221/00; H01H2221/054; H01H2233/00; H01H2233/03; H01H2233/044
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
86 words
A keyboard for an electronic apparatus comprising: a plurality of keytops for inputting information; a frame having opening portions to expose said plurality of keytops from the inside of the electronic apparatus to the outside; and a spring member elastically supporting said plurality of keytops, wherein said spring member is fixed to said frame and includes a single flat and thin plate and said frame includes stopper portions projected near said opening portions for contacting said spring member to cause said spring member to be deformed.
Claim 2
Dependent Claim
86 words
A keyboard for an electronic apparatus comprising: a plurality of keytops for inputting information; a frame having opening portions to expose said plurality of keytops from the inside of the electronic apparatus to the outside; and a spring member elastically supporting said plurality of keytops, wherein said spring member is fixed to said frame and includes a single flat and thin plate and said frame includes stopper portions projected near said opening portions for contacting said spring member to cause said spring member to be deformed.
Claim 3
Dependent Claim
51 words
A keyboard according to claim 1, wherein said spring member includes a plurality of elastic portions, one end of each said elastic portion being connected to a said keytop and the other ends of a plurality of said elastic portions being connected at a single coupling portion fixed to said frame.
Claim 4
Dependent Claim
31 words
A keyboard according to claim 2, wherein said spring member comprises a repetitive pattern formed by adjacently arranging a predetermined pattern of said keytops, said elastic portions and said coupling portion.
Claim 5
Dependent Claim
154 words
A keyboard for an electronic apparatus comprising: a plurality of keytops for inputting information; a frame having opening portions to expose said plurality of keytops from the inside of the electronic apparatus to the outside; and a spring member elastically supporting said plurality of keytops, wherein said spring member (i) is fixed to said frame, (ii) includes a plurality of elastic portions, one end of each said elastic portion being connected to a said keytop and the other ends of a plurality of said elastic portions being connected at a single ring-shaped coupling portion fixed to said frame, and (iii) is constructed such that two pairs of adjacent keytops are coupled to one single ring-shaped coupling portion fixed to said frame and such that each of said elastic portions coupling each keytop of the two pairs of adjacent keytops to the one single ring-shaped coupling portion are integrally coupled by the ring-shaped coupling portion.
Claim 6
Dependent Claim
154 words
A keyboard for an electronic apparatus comprising: a plurality of keytops for inputting information; a frame having opening portions to expose said plurality of keytops from the inside of the electronic apparatus to the outside; and a spring member elastically supporting said plurality of keytops, wherein said spring member (i) is fixed to said frame, (ii) includes a plurality of elastic portions, one end of each said elastic portion being connected to a said keytop and the other ends of a plurality of said elastic portions being connected at a single ring-shaped coupling portion fixed to said frame, and (iii) is constructed such that two pairs of adjacent keytops are coupled to one single ring-shaped coupling portion fixed to said frame and such that each of said elastic portions coupling each keytop of the two pairs of adjacent keytops to the one single ring-shaped coupling portion are integrally coupled by the ring-shaped coupling portion.
Claim 7
Dependent Claim
107 words
A keyboard for an electronic apparatus comprising: a plurality of keytops for inputting information; a frame having opening portions to expose said plurality of keytops from the inside of the electronic apparatus to the outside and stopper portions projecting toward the inside of the electronic apparatus near said opening portions; and a spring member for elastically biasing said keytops toward said stopper portions, wherein said spring member includes a single flat and thin plate comprising a plurality of elastic members each connected at one end to one of said keytops and at the other end to a coupling member having a portion thereof fixed to said frame.
Claim 8
Dependent Claim
107 words
A keyboard for an electronic apparatus comprising: a plurality of keytops for inputting information; a frame having opening portions to expose said plurality of keytops from the inside of the electronic apparatus to the outside and stopper portions projecting toward the inside of the electronic apparatus near said opening portions; and a spring member for elastically biasing said keytops toward said stopper portions, wherein said spring member includes a single flat and thin plate comprising a plurality of elastic members each connected at one end to one of said keytops and at the other end to a coupling member having a portion thereof fixed to said frame.
Claim 9
Dependent Claim
31 words
A keyboard according to claim 5, wherein said spring member comprises a repetitive pattern formed by adjacently arranging a predetermined pattern of said keytops, said elastic members and said coupling members.
Claim 10
Dependent Claim
33 words
A keyboard according to claim 5, wherein said spring member is constructed such that two pairs of adjacent keytops are coupled to said coupling member, and said coupling member is a ring-shaped member.
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) | 1990-01-19 | 1990-07-21 | 1991-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-19 | 1994-07-21 | 1995-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-19 | 1998-07-21 | 1999-01-20 | $7700.00 | Window Closed / Lapsed |