US3884407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pinch roller shifting mechanism for sequentially shifting a pinch roller in two substantially perpendicular directions toward a capstan
Assignee: Denki Onkyo Co Ltd
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Filing: 1973-09-11
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Granted: 1975-05-20
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Expires: 1993-09-11
Abstract
Abstract A pinch roller shifting mechanism for tape recorder or tape player which is adapted so that the pinch roller lifts up to a position opposing the capstan at a specified distance therefrom in accordance with movement of a first solenoid plunger and the lifted pinch roller then moves horizontally to a position where it contacts the capstan in accordance with movement of a second solenoid plunger. A guide means guides the pinch roller in its vertical and horizontal movement.
Inventors
- 👤 Masayuki Sugimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:44
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/28; G11B15/29; G11B15/02; G11B15/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
348 words
A pinch roller shifting mechanism for tape recorder or tape player comprising: a. a capstan for forwarding a magnetic tape, b. a pinch roller rotatably mounted on a shaft parallel to the axis of said capstan, c. support means for supporting said pinch roller and for moving said pinch roller in the axial direction of said capstan and for moving said pinch roller in another direction perpendicular to said axial direction to move said pinch roller toward and away from said capstan, d. a first driving means comprising a first solenoid plunger having a first plunger rod which moves in its axial direction when said first solenoid plunger is energized, e. first coupling means connecting said first plunger to said support means for moving said support means in the axial direction of said capstan wherein said pinch roller is moved to a position in the same horizontal plane as said capstan in response to the movment of said first plunger rod, f. a second driving means comprising a second solenoid plunger having a second plunger rod which moves in its axial direction when said second solenoid plunger is energized, g. second coupling means connecting said second plunger to said support means for moving said support means from a position where said pinch roller opposes said capstan to a position where said pinch roller contacts said capstan whereby said pinch roller contacts said capstan in response to the movement of said second plunger rod, and h. a unitary guide means comprising a vertical wall means in contact with said support means for guiding the movement of said support means in the axial direction of said capstan until said pinch roller rises to a position opposing said capstan and a horizontal surface means in contact with said support means when it is in its raised position for guiding the horizontal movement of said support means and maintaining the vertical alignment of said pinch roller with said capstan to guide said pinch roller from a position where said pinch roller opposes said capstan to a position where it contacts said capstan.
Claim 2
Dependent Claim
348 words
A pinch roller shifting mechanism for tape recorder or tape player comprising: a. a capstan for forwarding a magnetic tape, b. a pinch roller rotatably mounted on a shaft parallel to the axis of said capstan, c. support means for supporting said pinch roller and for moving said pinch roller in the axial direction of said capstan and for moving said pinch roller in another direction perpendicular to said axial direction to move said pinch roller toward and away from said capstan, d. a first driving means comprising a first solenoid plunger having a first plunger rod which moves in its axial direction when said first solenoid plunger is energized, e. first coupling means connecting said first plunger to said support means for moving said support means in the axial direction of said capstan wherein said pinch roller is moved to a position in the same horizontal plane as said capstan in response to the movment of said first plunger rod, f. a second driving means comprising a second solenoid plunger having a second plunger rod which moves in its axial direction when said second solenoid plunger is energized, g. second coupling means connecting said second plunger to said support means for moving said support means from a position where said pinch roller opposes said capstan to a position where said pinch roller contacts said capstan whereby said pinch roller contacts said capstan in response to the movement of said second plunger rod, and h. a unitary guide means comprising a vertical wall means in contact with said support means for guiding the movement of said support means in the axial direction of said capstan until said pinch roller rises to a position opposing said capstan and a horizontal surface means in contact with said support means when it is in its raised position for guiding the horizontal movement of said support means and maintaining the vertical alignment of said pinch roller with said capstan to guide said pinch roller from a position where said pinch roller opposes said capstan to a position where it contacts said capstan.
Claim 3
Dependent Claim
65 words
A pinch roller shifting mechanism in accordance with claim 1, including a first resetting means contacting said support means for providing a resetting force to said support means in said axial direction wherein said first driving means raises said support means against the resetting force of said first resetting means such that said pinch roller opposes said capstan when said first solenoid plunger is energized.
Claim 4
Dependent Claim
71 words
A pinch roller shifting mechanism in accordance with claim 2, wherein said first coupling means comprises a lever arm means connected to said first plunger rod and contacting said support means for moving said support means in said axial direction in response to the axial movement of said first plunger rod, and wherein said first resetting means is a first coil spring which obstructs lever operation of said lever arm means.
Claim 5
Dependent Claim
74 words
A pinch roller shifting mechanism in accordance with claim 1, including a second resetting means contacting said second coupling means for providing a resetting force to said support means to maintain said pinch roller at a position away from said capstan wherein said second driving means moves said support means against the resetting force of said second resetting means so that said pinch roller contacts said capstan when said second solenoid plunger is energized.
Claim 6
Dependent Claim
143 words
A pinch roller shifting mechanism in accordance with claim 4, wherein said support means rotates in a plane at a right angle to said axial direction of the capstan such that said pinch roller contacts said capstan, wherein said second driving means comprises a first rotary arm coupled to said second plunger rod for converting axial movement of said second plunger rod into rotary movement and a crank arm coupled to said first rotary arm for transmitting the rotary movement of said first rotary arm to said support means to rotate said support means, whereby said first rotary arm rotates according to movement of said second plunger rod to cause said crank arm to move in its lengthwise direction, whereby said support means is rotated according to lengthwise movement of said crank arm and said pinch roller is moved to contact the capstan.
Claim 7
Dependent Claim
111 words
A pinch roller shifting mechanism in accordance with claim 5, wherein a second rotary arm which is rotatable about an axis in parallel with the axial direction of said capstan and said second rotary arm includes an engaged part, and wherein said crank arm is provided with an engaging part which engages with said engaged part and transmits a force to said engaged part to rotate said second rotary arm when the crank arm moves in the lengthwise direction whereby said pinch roller contacts said capstan and further wherein said resetting means is a second coil spring which provides a force against rotary movement of said second rotary arm for resetting.
Claim 8
Dependent Claim
265 words
A pinch roller shifting mechanism in accordance with claim 6, wherein a third rotary arm is coupled to said second rotary arm, and rotates about an axis in parallel with the axis of said second rotary arm in a direction opposite to the direction of said second rotary arm when said second rotary arm rotates, said mechanism further including first and second guide pins positioned on each side of the line between said capstan and said pinch roller parallel to said capstan, a fourth rotary arm coupled to said first guide pin at one end, said fourth rotary arm being rotatable about an axis parallel with said capstan, a third coil spring for providing a force to said end of said fourth rotary arm, a fifth rotary arm coupled to said seCond guide pin at one end and rotatable about an axis parallel with said capstan and a fourth coil spring for providing a force to said end of said fifth rotary arm, wherein said second rotary arm engages said fourth rotary arm to prevent said fourth rotary arm from being rotated by the force of said third coil spring, said third rotary arm engages said fifth rotary arm to prevent said fifth rotary arm from being rotated by the force of said fourth coil spring, and said fourth and fifth rotary arms rotate to move said first and second guide pins in the direction from said pinch roller to said capstan when said crank arm moves to cause said pinch roller to contact said capstan and said second and third rotary arms are rotated.
References Cited (Backward Citations)
US3662938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |