JPH05144128A - Fast forward and rewind device for tape player - Google Patents

Abstract

PURPOSE:To surely mesh an idler gear with a flywheel gear and a reel base gear by surely turning an idler arm in a sliding operation of a changeover plate. CONSTITUTION:One pair of flywheel gears 11 and 12 on right and left, which rotate in the reverse direction to each other and one pair of reel base gears 15 and 16 are provided to be freely rotatable. The idler gears 20 and 21 for selectively meshing with the one of the flywheel gears 11 and 12 and one of the reel base gears 15 and 16 respectively are borne by the idler arm 23. Engagement projection parts 33 and 34 for engaging with projecting parts 30 and 31 of the idler arm 23 are projectingly provided on the changeover plate 26 that is freely slidable. The idler arm 23 is movably fitted on a supporting shaft 22 of a substrate 13. The idler arm 23 is energized by a spring 35 in the direction of engaging the projecting parts 30 and 31 with the engagement projection parts 33 and 34 of the changeover plate. The movement of the changeover plate is not prevented by the idler arm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fast forward and rewind device for a tape player using a cassette type magnetic tape.

[0002]

2. Description of the Related Art In a conventional fast-forwarding and rewinding device of this type of tape player, as shown in FIG. 7, an idler arm 1 is rotatably supported on a substrate by a support shaft 2. Protrusions 3 and 4 are formed on the left and right of one end of
Engagement protrusions 5 and 6 that engage with the protrusions 3 and 4 in a detachable manner.
Is provided on the side edge of the switching plate 7, and the idler arm 1 has an idler gear 10 that selectively meshes with the left and right flywheel gears (not shown) and the left and right reel base gears 9 supported. Has been.

This fast-forwarding and rewinding device is
By the linear sliding of the switching plate 7, for example, the one engaging protrusion 5 on the right side engages with the one protrusion 3 on the right side of the idler arm 1 and the idler arm 1 is rotated counterclockwise about the spindle. Direction, the idler gear 10 pivotally supported on the idler arm 1 is meshed with the left flywheel gear and the reel base gear 9 to rotate the reel base fast forward, and the other left side engaging protrusion is also used. 6 is idler arm 1
The idler arm 1 is engaged with the other protrusion 4 on the left side of the to rotate the idler arm 1 clockwise about the spindle, and the idler gear 10 pivotally supported on the idler arm 1 is used as the right flywheel gear and reel stand gear. The reel base is rewound and rotated by meshing.

[0004]

In the fast-forwarding and rewinding device of the tape player having the above-mentioned conventional structure, one of the engaging protrusions 5 and 6 and the protrusion 3 of the idler arm 1 are slid by the switching plate 7. , 4 of the idler arm 1 when the idler arm 1 is rotated and there is no gap between the protrusions 3 and 4 and the engaging protrusions 5 and 6, the idler arm 1 is fixedly supported. Since the shaft 2 is pivotally supported, the switching plate 7 cannot slide due to the collision between the tooth tops of the reel base gear 9 and the tooth tops of the idler gear 10, and the protrusions 3 and 4 and the engaging protrusions are engaged. If the gap G between 5 and 6 is too large, the idler gear 10 has a shallow mesh between the flywheel gear and the reel base gear 9 and meshes at the tip of the gear, causing noise, or
There is a problem that the reel base is not rotated because the meshing is not performed.

Further, the incompatibility between the reel base gear 9 and the gear 10 has a problem that vibration generated at the time of meshing may be transmitted to the idler arm 1 to generate noise.

Therefore, either one of the engaging projections 5 and 6 of the switching plate 7 and the projection 3 of the idler arm 1 are provided.
4 is preferably close to zero, but there is no gap between any one of the engaging projections 5 and 6 and the projections 3 and 4 because of the dimensional tolerance of the parts. You can't.

In the past, this problem has been solved, for example, as described in Japanese Utility Model Publication No. 55-35628.
A structure with an absorption mechanism is adopted so that the switching plate can slide by absorbing the collision between the protrusion and the engaging protrusion.
There is a problem that the number of parts is large and the number of assembling steps is large.

The present invention has been made in view of the above problems, and the idler arm is reliably rotated by the sliding operation of the switching plate, so that the idler gear can be reliably meshed with the flywheel gear and the reel base gear. A fast forward and rewind device for a tape player is provided.

[0009]

A tape player fast-forwarding and rewinding device according to the present invention includes a pair of left and right flywheel gears that are rotatably supported by a substrate and are rotated in opposite directions, and a pair of the flywheels. A pair of reel base gears that are rotatably supported by the base plate and rotate a reel base corresponding to gears, and a flywheel gear that is rotatably mounted on the base plate and rotatably supports an idler gear. And one reel base gear and between the other flywheel gear and the other reel base gear, and an idler arm that is selectively meshed, and is slidably attached to the substrate and disengaged from the idler arm. The idler arm has an engaging projection formed at one end and a side edge of the switching plate. Engaging protrusions that are respectively engaged and disengaged are formed on the protrusions, and the idler arm is supported by the idler arm in a fast forward and rewind device of a tape puller that is loosely fitted to a support shaft protruding from the substrate. A spring is stretched between the shaft and the shaft.

[0010]

In the fast-forwarding and rewinding device of the tape player of the present invention, sliding of the switching plate causes the engaging projection to engage with the projection of the idler arm, and the idler arm rotates, and the idler arm is rotated. The idler gear supported is meshed with the flywheel gear and the reel base gear. At this time, the engagement protrusion of the switching plate and the protrusion of the idler arm engage the idler gear with pressure to a position where it meshes with the flywheel gear and the reel base gear, and the switching plate slides. When the engagement between the engagement projection and the projection is released, the idler arm is returned to the position where the projection is engaged with the engagement projection by the urging force of the spring.

Then, one reel base gear is rotated by sliding the switching plate in one direction, the tape is fast-forwarded, and the other reel base gear is rotated by sliding the switching plate in the other direction, and the tape is It is rewound.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a fast-forwarding and rewinding device of a tape player according to the present invention will be described with reference to FIG. 11 and 12 are substrates 13
A pair of flywheel gears that are rotatably supported by support shafts 14, respectively.
The belts 12 driven by the electric motor 40 are rotated in opposite directions.

Reference numerals 15 and 16 denote a pair of reel base gears corresponding to the pair of flywheel gears 11 and 12, respectively, rotatably supported by the support shaft 17 on the base plate 13.
The reel base gears 15 and 16 are frictionally engaged to support shafts 17,
The reel stand rotatably supported on 17 is adapted to rotate.

Numerals 20 and 21 are idler gears which rotate integrally,
The idler gears 20 and 21 are rotatably supported by a shaft 22 at the tip of an idler arm 23 rotatably attached to the substrate 13 by a support shaft 25. Then, by the rotation of the idler arm 23, the one idler gear 20 meshes with one flywheel gear 11 and the other idler gear 21 meshes with the reel base gear 15, or one idler gear 20 couples with the other flywheel gear 12. The other idler gear 21 meshes with the other reel base gear 16. Further, the idler arm 23 is formed with a play hole 24 which is movably fitted to a support shaft 25 projecting from the substrate 13, and the idler arm 23 is moved by engagement of the play hole 24 and the support shaft 25. It has become so.

Reference numeral 26 is a switching plate. The switching plate 26 has a slot 27 in the substrate 13 and a substrate engaged with the slot 27.
It is slidably attached by engagement with a guide shaft 28 protrudingly provided on the shaft 13.

Further, the idler arm 23 has protrusions 30 and 31 projecting from the left and right of the base end portion thereof, and one side edge of the switching plate 26 is engaged with and disengaged from the left and right protrusions 30 and 31, respectively. The engaging protrusions 33, 34 are projected.

Further, 35 is a spring for urging the idler arm 23 in a direction in which the projections 30, 31 engage with the engagement projections 33, 34 of the switching plate 26.
Both ends are stretched between the support shaft 25 and a locking piece 36 cut and raised in the idler arm 23.

By the switching sliding operation of the switching plate 26, the pinch roller is moved toward and away from the capstan, and the head position is advanced and retracted to the tape sliding position.

Further, the switching plate 26 is operated by an automatic reverse mechanism or an operation lever for detecting the end of the tape.

Further, the rotation range of the idler arm 23 is restricted by the engagement of the engaging piece 40 and the restriction hole 41 of the substrate 13.

Next, the operation of this embodiment will be described. When the switching plate 26 slides in one direction from the neutral position shown in FIG. 1, one engaging projection 33 engages with one projection 30 of the idler arm 23, and the idler arm 23 rotates counterclockwise. This idler arm moves as shown in FIGS. 2 and 3.
One idler gear 20 pivotally supported by 23 meshes with one flywheel gear 11, and the other idler gear 21 meshes with the reel base gear 15. At this time, due to the engagement between the engagement protrusion 33 of the switching plate 26 and the protrusion 30 of the idler arm 23,
The idler arm 23 retracts against the urging force of the spring 35 by the engagement of the play hole 24 and the support shaft 25, and the idler arm 23 surely engages the idler gears 20 and 21 with the flywheel gear 11 and the reel base gear 15. It is crimped and rotated to the matching position. At this time, the head is retracted from the position where it comes into contact with the tape, and the reel base is fast-forwarded and rotated.

When the engagement projection 33 and the projection 30 are disengaged by sliding the switching plate 26, the idler arm is released.
23 is the urging force of the spring 35, and the projections 30 and 31 are engaged projections 3
It is returned to the position where it engages with 3, 34.

When the switching plate 26 slides in the other direction, the other engaging projection 34 engages with the one projection 31 of the idler arm 23, and the idler arm 23 rotates clockwise.
As shown in FIG. 2, one idler gear 20 pivotally supported by the idler arm 23 meshes with the other flywheel gear 12, and the other idler gear 21 meshes with the other reel base gear 16. Also at this time, the engagement protrusion 34 of the switching plate 26 and the protrusion 31 of the idler arm 23 are engaged with each other, so that the idler arm 23 retracts against the urging force of the spring 35, and the idler arm 23 surely moves. 20 and 21 are rotated until they mesh with the flywheel gear 12 and the reel base gear 16. At this time, the reel stand is rewound and rotated with the head retracted from the contact position of the tape.

Then, as shown in FIG. 4, the switching plate
The idler arm 23 is rotated by the engagement of the engaging protrusion 33 and the protrusion 30 by sliding 26, and the reel base gear 15 or 16 and the tip of the idler gear 20 are not meshed with each other. Then,
Since the flywheel gears 11 and 12 are rotated, the idler arm 23 slightly turns counterclockwise against the spring 35, and the idler gear 20 is meshed with the flywheel gear 11. Then, the idler gear 21 properly meshes with the reel base gear 15 or 16 as shown in FIG. 3, and the spring 35 also returns from the state of FIG. 6 to the state of FIG.

In the above embodiment, the idler gear is formed of two coaxial gears, but it may be formed of one gear.

[0026]

According to the present invention, the engaging projection of the switching plate is prevented from moving due to the engagement with the projection of the idler arm, and the sliding operation of the switching plate ensures reliable operation with a simple structure. The idler arm is rotated so that the idler gear can be reliably meshed with the flywheel gear and the reel base gear. Moreover, since the idler arm is biased by the spring, the idler arm does not vibrate and noise is reduced. The occurrence of is reduced.

[Brief description of drawings]

FIG. 1 is a plan view of a fast forward and rewind device of a tape player showing an embodiment of the present invention.

FIG. 2 is a plan view showing the same switching state as above.

FIG. 3 is an enlarged plan view of part of the above.

FIG. 4 is a plan view showing a process in which the idler gear and the reel base gear mesh with each other.

5 is an enlarged plan view of the spring portion in the state shown in FIG.

6 is an enlarged plan view of the spring portion in the state shown in FIG.

FIG. 7 is a plan view of an idler arm portion of a conventional tape player fast forward and rewind device.

[Explanation of symbols]

 11,12 Flywheel gear 13 Substrate 15,16 Pair of reel base gears 20,21 Idler gear 23 Idler arm 25 Spindle 26 Switching plate 30,31 Protrusion 33,34 Engagement protrusion 35 Spring

Claims (1)

[Claims] 1. A pair of left and right flywheel gears rotatably supported by a substrate and rotated in opposite directions, and a pair of rotatably supported by the substrate corresponding to the pair of flywheel gears, respectively. Reel base gear, and an idler gear rotatably attached to the substrate and rotatably supporting an idler gear between the one flywheel gear and one reel base gear, and the other flywheel gear and the other reel base gear. An idler arm selectively engaged between the idler arm and a switching plate that is slidably attached to the base plate and is engaged with and disengaged from the idler arm to switch and rotate the idler arm. And fast-rewinding and rewinding device of the tape player, in which the engaging projections that are engaged with and disengaged from the projections are formed on the side edges of the switching plate. In the fast forward and rewind of the tape player, the idler arm is movably fitted to a support shaft protruding from the substrate, and a spring is stretched between the idler arm and the support shaft. apparatus.