US5038236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape cassette ejecting device
Assignee: Nidec Instruments Corp
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Filing: 1989-07-14
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Granted: 1991-08-06
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Expires: 2009-07-14
Abstract
Abstract A magnetic tape cassette ejecting device, which includes a holder carriage holding a cassette to be moved between a recording and reproducing position and a cassette insertion and removal position. The ejecting device also includes an arm which is swung with the displacement of the holder carriage, a reversing lever engaged with the swing arm which is turned as the arm swings, and a reversing spring interposed between the reversing lever and a swingable fulcrum lever. The fulcrum lever is integral with a cassette ejection arm and operates to urge the ejection arm in a cassette removal direction when the holder carriage is at the cassette insertion and removal position. The fulcrum also urges the ejection arm in the opposite direction when, inserting the cassette, the cassette's front end contacts the ejection arm to turn it, thereby urging the eject arm in the cassette removal direction again when after insertion of the cassette, the holder carriage has been moved to the recording and reproducing position.
Inventors
- 👤 Yasuyuki Nakahara
- 👤 Masaru Uno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:15
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/675; G11B15/67581; G11B15/67584
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
214 words
A magnetic tape cassette ejecting device for use with cassettes with openable front end covers comprising: cassette holding means for holding a cassette, in which a magnetic tape is accommodated, so as to move said cassette between a magnetic tape recording/reproducing position and a cassette insertion/removal position; cassette ejecting means for urging said cassette, while at said cassette insertion/removal position, in a direction outwardly from said cassette holding means, said cassette ejecting means being positioned at an inward location while at said magnetic tape recording/reproducing position so as to be positioned away from the openable cover; energizing means for providing an energizing force for said cassette ejecting means; and energization direction reversing means comprising: a swing arm which is turned in association with said cassette holding means; a reversing lever which is pivoted by said swing arm; and a rotatable fulcrum lever, integral with said cassette rejecting means, coupled with said energizing means; said energization direction reversing means for reversing the direction of energization of said cassette ejecting means provided by said energizing means while said cassette is being inserted in said cassette holding means, and reversing the direction of energization of said energizing means while said cassette holding means is being displaced from said cassette insertion/removal position to the magnetic tape recording/reproducing position.
Claim 2
Dependent Claim
214 words
A magnetic tape cassette ejecting device for use with cassettes with openable front end covers comprising: cassette holding means for holding a cassette, in which a magnetic tape is accommodated, so as to move said cassette between a magnetic tape recording/reproducing position and a cassette insertion/removal position; cassette ejecting means for urging said cassette, while at said cassette insertion/removal position, in a direction outwardly from said cassette holding means, said cassette ejecting means being positioned at an inward location while at said magnetic tape recording/reproducing position so as to be positioned away from the openable cover; energizing means for providing an energizing force for said cassette ejecting means; and energization direction reversing means comprising: a swing arm which is turned in association with said cassette holding means; a reversing lever which is pivoted by said swing arm; and a rotatable fulcrum lever, integral with said cassette rejecting means, coupled with said energizing means; said energization direction reversing means for reversing the direction of energization of said cassette ejecting means provided by said energizing means while said cassette is being inserted in said cassette holding means, and reversing the direction of energization of said energizing means while said cassette holding means is being displaced from said cassette insertion/removal position to the magnetic tape recording/reproducing position.
Claim 3
Dependent Claim
31 words
A magnetic tape cassette ejecting device as claimed in claim 1, wherein said swing arm comprises a sector shaped gear meshed with a gear train which is coupled to a damper.
Claim 4
Dependent Claim
28 words
A magnetic tape cassette ejecting device as claimed in claim 1, wherein said energizing means comprises a reversing spring interposed between said fulcrum lever and said reversing lever.
Claim 5
Dependent Claim
36 words
A magnetic tape cassette ejecting device as claimed in claim 1, wherein said swing arm has a groove shaped cam surface, and said reversing lever is turned while being kept in contact with said cam surface.
Claim 6
Dependent Claim
54 words
A magnetic tape cassette ejecting device as claimed in claim 1, wherein said swing arm comprising a groove shaped cam for causing the reversing lever to turn, in order to turn the urging direction of said energizing means, when the cassette holding means is moved from the cassette insertion/removal position to the recording/reproducing position.
Claim 7
Dependent Claim
230 words
A magnetic tape cassette ejecting device for use with cassettes with openable front end covers comprising: a cassette holder for holding a cassette in which a magnetic tape is accommodated; a holder carriage for holding said cassette holder so as to move said cassette holder between a magnetic tape recording/reproducing position and a cassette insertion/removal position; a swing arm which rotates about a shaft in association with said holder carriage, said swing arm having a cam; a reversing lever engaged with said cam of said swing arm, to turn in association with the rotational motion of said swing arm; an ejection arm for removing said cassette from said cassette holder; a swingable fulcrum lever integral with said ejection arm; and a reversing spring interposed between said fulcrum lever and said reversing lever, said reversing spring (a) urging said ejection arm in a cassette removal direction when said holder carriage is at said cassette insertion/removal position, (b) urging said ejection arm in a direction opposite to said cassette removal direction when, during insertion of said cassette into said cassette holder, the front end of said cassette is brought into contact with said ejection arm to turn said ejection arm against the energizing force of said reversing spring, and (c) urging said ejection arm in the cassette removal direction when, said holder carriage has been moved to said magnetic tape recording/reproducing position.
Claim 8
Dependent Claim
230 words
A magnetic tape cassette ejecting device for use with cassettes with openable front end covers comprising: a cassette holder for holding a cassette in which a magnetic tape is accommodated; a holder carriage for holding said cassette holder so as to move said cassette holder between a magnetic tape recording/reproducing position and a cassette insertion/removal position; a swing arm which rotates about a shaft in association with said holder carriage, said swing arm having a cam; a reversing lever engaged with said cam of said swing arm, to turn in association with the rotational motion of said swing arm; an ejection arm for removing said cassette from said cassette holder; a swingable fulcrum lever integral with said ejection arm; and a reversing spring interposed between said fulcrum lever and said reversing lever, said reversing spring (a) urging said ejection arm in a cassette removal direction when said holder carriage is at said cassette insertion/removal position, (b) urging said ejection arm in a direction opposite to said cassette removal direction when, during insertion of said cassette into said cassette holder, the front end of said cassette is brought into contact with said ejection arm to turn said ejection arm against the energizing force of said reversing spring, and (c) urging said ejection arm in the cassette removal direction when, said holder carriage has been moved to said magnetic tape recording/reproducing position.
Claim 9
Dependent Claim
41 words
A magnetic tape cassette ejecting device as claimed in claim 6, wherein said holder carriage holding said cassette holder is turned about a shaft provided on a chassis to move between said cassette insertion/removal position and said magnetic tape recording/reproducing position.
Claim 10
Dependent Claim
62 words
A magnetic tape cassette ejecting device as claimed in claim 6, wherein a straight line is formed between a swing center of said fulcrum lever and a first end of said reversing spring such that when a second end of said reversing spring connected to said fulcrum lever, crosses said straight line, the direction of energization force of said ejection arm switches.
Claim 11
Dependent Claim
31 words
A magnetic tape cassette ejecting device as claimed in claim 6, wherein said swing arm comprises a sector shaped gear meshed with a gear train which is coupled to a damper.
Claim 12
Dependent Claim
53 words
A magnetic tape cassette ejecting device as claimed in claim 6, wherein said cam has a groove shaped cam for causing the reversing lever to turn in order to turn the urging direction of said energizing means, when the cassette holding means is moved from the cassette insertion/removal position to the recording/reproducing position.
References Cited (Backward Citations)
US4802037A
Cited
US4802039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-05 | 1995-02-04 | 1995-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-05 | 1999-02-04 | 1999-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-05 | 2003-02-04 | 2003-08-06 | $7700.00 | Window Closed / Lapsed |