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US 4,875,113 AGranted
Automatic stopping device for a tape feeding apparatus
AssigneeTanashin Denki Co., Ltd.
InventorTadao Arata
Life of this patent
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AssigneeTanashin Denki Co., Ltd.
InventorTadao Arata
Estimating the term…
An automatic stopping device for a tape feeding apparatus which can assuredly detect that a tape is wound to its last end and can stop feeding of the tape not only in a reproduction mode but also in a fast feeding mode of the tape feeding apparatus. Stopping of rotation of a reel shaft is detected by a frictionally cooperating cam follower which is thereupon disengaged from a circular cam and engaged with an operating element both on a turning force transmitting member to pivot a pivotal member so that the turning force transmitting member on the pivotal member is moved out of a turning force transmitting route from a capstan shaft to the reel shaft and a switch is operated to deenergize a motor connected to the capstan shaft. After stopping of the motor, a movable member may be manually moved to a rest mode position in which the cam follower is engaged with the circular cam again. The movable member is arrested at the rest mode position until a tape cassette is subsequently loaded in position in the tape feeding apparatus.
An automatic stopping device for a tape feeding apparatus which includes a capstan shaft, a reel shaft, a motor for normally rotating said capstan shaft and said reel shaft, and a switch for interrupting energization of said motor to stop rotation of said capstan shaft and said reel shaft, comprising a turning force transmitting member connected to said motor via said capstan shaft, a pivotal member supporting said turning force transmitting member for rotation thereon and mounted for pivotal motion between an operative position in which transmission of a turning force from said turning force transmitting member to said reel shaft is enabled and an inoperative position in which transmission of a turning force is disabled, said switch being located for operation by said pivotal member so as to deenergize said motor in response to the inoperative position of said pivotal member, means for biasing said pivotal member toward the operative position, frictional coupling means interposed between said turning force transmitting member and said reel shaft, detecting means for detecting stopping of rotation of said reel shaft, operating means on said turning force transmitting member operable when said detecting means detects stopping of rotation of said reel shaft for cooperating with said detecting means to pivot said pivotal member from the operative to the inoperative position, and a movable member mounted for movement between an operative mode position and a rest mode position and operable upon movement thereof from the operative mode position to the rest mode position after stopping of said motor for disabling cooperation between said detecting means and said operating means.
An automatic stopping device for a tape feeding apparatus which includes a capstan shaft, a reel shaft, a motor for normally rotating said capstan shaft and said reel shaft, and a switch for interrupting energization of said motor to stop rotation of said capstan shaft and said reel shaft, comprising a pivotal member mounted for pivotal motion around a predetermined axis and spring-biased to a predetermined position, a turning force transmitting member supported for rotation on said pivotal member and connected to be rotated by a turning force of said capstan shaft and transmit, when said pivotal member is in the predetermined position, the turning force of said capstan shaft to said reel shaft via a first friction mechanism, a circular cam located for integral rotation on said turning force transmitting member and in an eccentric relationship around an axis of rotation of said turning force transmitting member, an operating element located on said turning force transmitting member in a spaced relationship from a peripheral face of said circular cam, a cam follower normally urged in one direction by the turning force of said reel shaft transmitted thereto via a second friction mechanism, and a movable member having an operative mode position and a rest mode position and having an engaging portion formed thereon, said cam follower having a first portion for slidably engaging with the peripheral face of said circular cam, a second portion for engaging with said operating element, and a third portion for engaging with said engaging portion of said movable member, whereby, when said reel shaft is rotating, said first portion of said cam follower is held in engagement with the peripheral face of said circular cam while said second portion of said cam follower is not engaged with said operating element, but when rotation of said reel shaft is stopped, said first portion of said cam follower is spaced away from the peripheral face of said circular cam so that said second portion of said cam follower is soon engaged with said operating element to move said pivotal member to operate said switch so as to interrupt energization of said motor while said turning force transmitting member is removed from a turning force transmitting route from said capstan shaft to said reel shaft, and then when said movable member is moved from the operative mode position to the rest mode position after stopping of said motor, said engaging portion of said movable member is engaged with said third portion of said cam follower to move said cam follower back to the position in which said first portion thereof is slidably engaged with the peripheral face of said circular cam and said second portion thereof is not engaged with said operating element.
An automatic stopping device for a tape feeding apparatus which includes a capstan shaft, a reel shaft, a motor for normally rotating said capstan shaft and said reel shaft, and a switch for interrupting energization of said motor to stop rotation of said capstan shaft and said reel shaft, comprising a turning force transmitting member which is rotated, during feeding of a tape, by a turning force of said capstan shaft to transmit the turning force to said reel shaft via a friction mechanism, an operating member which operates when rotation of said reel shaft is stopped, a pivotal member on which said turning force transmitting member is supported for rotation and which is pivoted in one direction by the turning force of said turning force transmitting member upon operation of said operating member to change over said switch to interrupt energization of said motor, said pivotal member being normally biased in the other direction, an arresting member which operates upon pivotal motion of said pivotal member in the one direction to arrest said pivotal member at its pivoted position, and a movable member having an operative mode position and a rest mode position and operable upon movement thereof from the operative mode position to the rest mode position to cancel an arrested condition of said pivotal member by said arresting member and in turn arrest said pivotal member at its pivoted position in the one direction.
Dependencies are inferred from the claim text.