JPH01134744A - Tape player - Google Patents

Abstract

PURPOSE:To realize the simplification and low costing of a tape player by executing the driving of a reel base and a mode changing-over gear by one motor and the planet gear turning around a driving gear. CONSTITUTION:When a capstan 6 and driving gear 9 are rotated by one motor M, a planet gear 12 is turned around this driving gear 9 and either of reel base 2 or 3 is driven by its rotation by meshing the turning around planet gear 12 with a pair of reel gears 4, 5. When the planet gear 12 is turned around by the rotation of one part of the motor M, it is meshed with a mode changing gear 15 on the way of its turning around locus, a head base 20 is driven according to the rotation of this gear 15, the magnetic head H thereon is moved to the position where it is brought into contact with a tape and a pinch roller 22 is made to come into contact with the capstan 6. Not only the driving of the reel bases 2, 3 but also all of the mode changes can be done only by the positive and reverse rotations of the driving gear. The simplification and low costing of the mechanism can thus be realized.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a tape player installed in an answering machine, etc., and in particular, a single motor drives a capstan, a pair of reel stands, and a head base. This invention relates to a tape player that can do everything.

[Background of the invention]

A tape player used in an audio device requires auto-reverse, a cue for finding the beginning of a song, a review operation, etc., so there is a natural limit to the simplification of its mechanism. However, if a simple tape player used, for example, in an answering machine, has basic functions such as recording, playback, tape rewinding, and fast forwarding, there will be no practical problems. In this case, the mechanisms that should be installed in the tape player include driving the capstan, driving a pair of reel stands to drive the tape reel, moving the magnetic head toward and away from the tape, and moving the pinch roller to the capstan. A device that drives the helad base to bring it into contact with and separate it from it is required.

[Problem that the invention seeks to solve]

Up until now, the minimum power sources for the basic operations of the above-mentioned tape player have been a single motor that drives the capstan and a pair of reel stands, and a motor that drives the head base. One solenoid is used. This type of tape player is disclosed, for example, in Japanese Utility Model Application No. 174036/1983.

However, even the conventional simple tape player, which is equipped with one motor and one solenoid, is still insufficient to simplify the mechanism and reduce costs. The cost of a tape player also has a large impact on the overall price.

The present invention solves the above-mentioned conventional problems, and allows not only a single motor to rotate the capstan and a pair of reel stands, but also to drive the head base, and the mechanism is simplified. The object of the present invention is to provide a tape player that can be manufactured at low cost.

[Specific Means for Solving the Problems] The tape player according to the present invention includes a capstan that is rotationally driven by a motor, a drive gear that rotates integrally with the capstan, and a drive gear that is constantly meshed with the drive gear. Depending on the rotation direction of the gear, the planetary gear that revolves around the drive gear meshes with the planetary gear that rotates when the drive gear rotates in the normal direction, and the position where the planetary gear that rotates when the drive gear rotates in the reverse direction meshes with each other. A pair of arranged reel gears, a reel stand rotated by the reel gear, and a planetary gear are arranged so as to mesh with the planet gear in the middle of a circular trajectory in which the planet gear moves from a position where it meshes with one reel gear to a position where it meshes with the other reel gear. A mode switching gear partially provided with teeth such that it can be rotated by a certain angle by a planetary gear, a switching cam that rotates together with the mode switching gear, and a mode switching gear that is rotated by a planetary gear. The head base is moved in the direction of the reel stand by being pushed by the switching cam during the reel position, and is equipped with a magnetic head and a pinch roller facing the capstan.

(Function) This tape player can switch between all modes simply by controlling the forward and reverse rotation of the motor. That is, when the capstan and the drive gear are rotated by one motor, the planetary gears revolve around the drive gear. One of the reel stands is rotationally driven by meshing the rotating planetary gear with the pair of reel gears. When the planetary gear is rotated by one side of the motor, it engages with the mode switching gear in the middle of its orbit, and the head base is driven in accordance with the rotation of the mode switching gear, and the magnetic head on the head base rotates around the tape. The pinch roller moves to a position where it contacts the capstan, and the pinch roller also comes into contact with the capstan.

When the mode switching gear completes driving the head base, the planetary gear passes through the toothless portion of the mode switching gear and continues to rotate, meshing with the other reel gear, driving the reel base, and winding the tape. When the motor is reversed from this position and the planetary gear is rotated in the opposite direction, it engages the mode switching gear again in the middle of its orbit, and the head base is returned by the rotation of this mode switching gear, and the magnetic head and pinch roller are rotated. It will now be separated from the tape and capstan. In this way, it is possible to drive not only the reel stand but also the head base by simply reversing the drive gear.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a tape player according to the present invention, and FIGS. 2 to 8 are plan views showing switching operations to each mode.

The tape player shown in this embodiment is loaded with a so-called micro-sized cassette half.

Structure of Tape Player In FIG. 1, reference numeral 1 denotes a chassis made of sheet metal. The side surface of the chassis 1 is bent into a crank shape, and has a two-stage structure including a lower installation surface 1a and an upper installation surface 1b.

A take-up side reel stand 2 and a supply side reel stand 3 are rotatably supported on the lower installation surface 1a. A beam Luga 4 is provided at the base of the reel stand 2 on the winding side, and a beam Luga 5 is provided at the base of the reel stand 3 on the supply side. A slip mechanism is provided between the reel gear 4 and the reel stand 2, and between the reel gear 5 and the reel stand 3, so that when tape tension is applied to the reel stand 2 or 3, the reel stand 2. 3 and Luga 4.5 slip, and the difference between the tape winding speed and the rotational speed of the reel gear is absorbed.

A bearing held by a housing 6a is provided on the upper installation surface 1b of the chassis 1, and the capstan 6 is rotatably supported by this bearing. A flywheel 7 integrated with the capstan 6 is provided below the upper installation surface 1b. Further, one motor M is provided on the side of the chassis 1, and a belt 8 is hung between the drive pulley of this motor M and the flywheel 7, and the motor M drives the flywheel 7 and the capstan 6. is designed to be rotationally driven. A drive gear 9 that rotates together with the capstan 6 is provided on the upper surface of the flywheel 7.

Further, an idle arm 11 is supported by the housing 6a provided on the upper mounting surface 1b of the chassis 1, and a planetary gear 12 which is always engaged with the drive gear 9 is provided at the tip of the idle arm 11. idle arm 1
A light rotational load is applied by a spring or the like between the shaft provided in the shaft 1 and the planetary gear 12 which rotates while being supported by this shaft. When the idler arm 11 rotates in that direction, the idle arm 11 follows the rotation direction, and the planetary gear 12 revolves around the drive gear 9 accordingly. When the drive gear 9 rotates clockwise, the planetary gear 12 orbiting around it reaches a position where it meshes with the reel gear 4 on the take-up side (see Fig. 5), and when the drive gear 9 rotates counterclockwise, , the planetary gear 12 reaches a position where it meshes with the reel gear 5 on the supply side (see FIG. 2).

A mode switching gear 15 is provided below the upper installation surface 1b of the chassis 1. The mode switching gear 15 is disposed at a position where the planetary gear 15 meshes with the planetary gear 12 in the middle of a circular trajectory from a position where the planetary gear 12 meshes with one reel gear 4 to a position where the planetary gear 12 meshes with the other reel gear 5. The mode switching gear 15 is provided with a toothless portion 15a, and has a structure in which teeth 15b are partially provided in other portions. If the teeth 15b face the planetary gear 12 that revolves around the drive gear 9, the rotational force of the planetary gear 12 is transmitted to the mode switching gear 15 via the teeth 15b, but the planetary gear 12 rotates around the drive gear 9. When the tooth missing portion 15a faces the planet gear 12, the planet gear 12 passes through the tooth missing portion 15a, and the planet gear 1
2 is designed to drive a circular trajectory without driving the mode switching gear 15.

A switching cam 16 is provided on the upper surface of the mode switching gear 15 so as to rotate together with the switching cam 16.

On the upper surface of the upper installation surface 1b of the chassis 1, there is a Herad base 2.
0 is set. This head base 20 is attached to a positioning bin 17.1 provided on the upper installation surface 1b of the chassis 1.
8, etc., and is slidable in the A-B direction. Further, a spring 21 is interposed between the rear end of the head base 20 and the chassis 1, and the head base 20 is biased in the direction B by the spring 21. In addition, a bent piece 20a is provided at the rear end of the helad base 20.
is formed by bending, and this bent piece 20a extends to a position facing the switching cam 16. A pitch roller 22 facing the magnetic head H1 and the capstan 6 is supported on the head base 20.

Next, the operation of the tape player having the above structure will be sequentially explained with reference to FIG. 2 and the subsequent drawings.

So-called micro-sized cassette half (not shown)
is loaded while being positioned by positioning bins 17 and 18. The tape reels in the cassette half are placed on each reel stand 2 and 3.

REW Mode FIG. 2 shows the tape rewind mode (REW mode). In this mode, the mode switching gear 15 is positioned in the direction shown in the figure, and the switching cam 16 faces diagonally to the left. Then, the head base 20 is returned in the direction B by the force of the spring 21, the pinch roller 22 on the head base 20 is separated from the capstan 6, and the magnetic head H is retreated to a position away from the tape T in the cassette half. ing. When the motor M is driven counterclockwise in this state, the flywheel 7, drive gear 9, and capstan 6 are driven counterclockwise. Following the counterclockwise rotation of the drive gear 9, the planetary gear 12 rotates the drive gear 9.
The planetary gear 12 is meshed with the reel gear 5 on the supply side. The rotational force of the motor M is transmitted from the drive gear 9 to the reel gear 5 via the planetary gear 12, and the reel stand 3 on the supply side is driven counterclockwise together with the reel gear 5. Then, the supply tape reel Rb in the cassette half rotates counterclockwise to rewind the tape. At this time, the rotational speed of the motor M is high, and the tape T is rewound at high speed.

Switching to play mode When switching from REW mode in Figure 2 to recording or playback mode (play mode), as shown in Figure 3,
Drive the motor clockwise.

When the drive gear 9 is driven clockwise by the motor M, the planetary gear 12 follows this and rotates clockwise, and the planetary gear 12 separates from the reel gear 5 and switches to the mode switching gear 1.
The tooth 15b meshes with the edge Eb of the tooth missing portion 15a at No.5. At this position, the power of the motor M is transmitted to the mode switching gear 15 via the drive gear 9 and the planetary gear 12, and the mode switching gear 15 is driven clockwise.

The planetary gear 15 will remain in this position while the mode switching gear 15 is driven. And mode switching gear 15
When is rotated to the position shown in FIG. 4, the missing tooth portion 15a of the mode switching gear 15 moves to the position of the planetary gear 12, and the planetary gear 12 separates from the edge Ea of the tooth 15b of the mode switching gear 15. You will be able to do this. The planetary gear 22 that is away from the edge Ea continues to rotate clockwise around the drive gear 9, and reaches a position where the planetary gear 12 meshes with the reel gear 4 on the winding side, as shown in FIG. 5 (play mode). During the period from FIG. 3 to FIG. 4, the switching cam 16 rotates clockwise together with the drive gear 15 rotating clockwise, and the switching cam 16 hits the bent piece 20a of the head base 20. The head base 20 is pushed out in the direction A against the force of the spring 21. At the time point in FIG. 4, the planetary gear 12 separates from the edge Ea of the tooth 15b, but at this time, the leading edge 16a of the switching cam 16
It is in contact with 0a. The planetary gear 12 touches the edge E of the tooth 15b.
After leaving point a, the head base 20 is slightly returned in the direction B due to the shape of the switching cam 16 and the return force of the head base 20 in the direction B by the spring 21, and in the play mode shown in FIG. , the mode switching gear 15 is rotated counterclockwise by an angle α compared to the state shown in FIG. 4 and then stopped. In this way, the edge Ea of the tooth 15b moves counterclockwise from the time when the planetary gear 12 leaves, and in the later mode switching operation, when the planetary gear 12 rotates counterclockwise. , this planetary gear 12 can reliably mesh with the edge Ea of the tooth 15b.

In the play mode shown in FIG. 5, since the head base 20 is moving forward in the direction A, the magnetic head H provided on the head base 20 comes into contact with the tape T in the cassette half. The pinch roller 22 also presses the tape T against the capstan 6. Since the motor M continues to rotate clockwise, the capstan 6 also rotates clockwise, and the tape T sandwiched between the pinch roller 22 and the capstan 6
The robot is made to travel rightward in the figure at a constant speed depending on the rotational speed of the robot. Also, the power of the motor M is driven by the drive gear 9 and the planetary gear 1.
2 to the reel gear 4, and the reel stand 2 on the winding side is driven clockwise. Then, the tape reel Ra on the take-up side in the cassette half is driven clockwise,
The tape is wound. Note that the difference between the rotational speed of the reel stand 2 and the tape running speed fed by the capstan 6 is absorbed by a slip mechanism provided between the reel gear 4 and the reel stand 2.

The magnetic head H performs a recording or reproducing operation on the tape T which is thus run by the capstan 6.

Canceling the play mode When canceling the play mode shown in Fig. 5, that is, when switching from the play mode to the stop mode, REW mode, or tape fast forward mode (FF mode), turn off the motor M from the play mode shown in Fig. 5. Change the rotation direction to counterclockwise. When the drive gear 9 is driven counterclockwise by the motor M, the planetary gear 12 starts rotating along the rotational direction of the drive gear 9, moves away from the reel gear 4, and the power to the take-up reel stand 2 is cut off. drooping

Further, the planetary gear 12 rotates counterclockwise until it meshes with the edge Ea of the tooth 15b of the mode switching gear 15, as shown in FIG. As shown in Fig. 5, mode switching gear 1
5, the edge Ea of the tooth 15b is driven to a position where it can easily engage the planetary gear 12. Therefore, the planetary gear 12 rotating counterclockwise rotates through the fi1 of the mode switching gear 15.
15b will surely mesh with it. As shown in FIG. 6, when the planetary gear 12 meshes with the teeth 15b of the mode switching gear 15, the power of the motor M is transmitted from the drive gear 9 to the mode switching gear 15 via the planetary gear 12. 15 is driven counterclockwise. When the mode switching gear 15 rotates to the angle shown in FIG. The pinch roller 22 moves back to a position where it does not hit the T, and the pinch roller 22 separates from the capstan 6. A device for detecting the rotation angle of the mode switching gear 15 is provided, and if the motor M is stopped when the state shown in FIG. 7 is reached, a stop mode is established.

Switching to FF mode When shifting to tape fast forward mode (FF mode), the motor M is reversed clockwise from the state shown in FIG. 7. By rotating the drive gear 9 clockwise, the planetary gear 1
2 rotates clockwise around the drive gear 9, moves away from the mode switching gear 15, and comes into mesh with the reel gear 4. At this time, since the rad base 20 remains retracted in the direction B as shown in FIG. 7, the magnetic head H and the pinch roller 22 are retracted to a position away from the tape T. In this state, the reel gear 4 is driven clockwise by the planetary gear 12, and the tape is wound by the reel stand 2. At this time, motor M is driven at high speed,
The tape T is run at high speed. When transitioning from the stop mode position to the FF mode, it is sufficient to rotate the motor M clockwise from the state shown in FIG. 7 as described above, but when transitioning from the REW mode to the FF mode shown in FIG. In this case, from the state shown in Fig. 2, go to the Brake mode for 8 lines as shown in Figs. 3 to 5, immediately follow the path shown in Figs. 6 to 7, and then switch to the FF mode. .

Switching to REW mode Next, when switching from the play mode shown in Fig. 5 to the REW mode shown in Fig. 2, or when switching from the FF mode to the REW mode, drive the motor M counterclockwise. Transition to the state shown in the figure. Then, from the state shown in FIG. 7, the motor M is roughly driven counterclockwise. This power is transmitted from the drive gear 9 to the mode switching gear 15 via the planetary gear 12.
The mode switching gear 15 is driven counterclockwise. When the mode switching gear 15 rotates to the position shown in FIG. 8, the edge E of the tooth 15b of the mode switching gear 15
The planetary gear 12 is disengaged from b, and the planetary gear 12 passes through the missing tooth portion 15a and follows a counterclockwise orbit, moving to a position where it meshes with the supply side glue gear 5, as shown in FIG. . Then, as described above, power is transmitted from the planetary gear 12 to the reel gear 5, and the tape is rewound by the reel stand 3.

In the process of shifting to the REW mode, as shown in FIG. 8, immediately after the planetary gear 12 comes off the edge Eb of the tooth 15b of the mode switching gear 15, the edge 16b of the switching cam 16 touches the bent piece of the herad base 20. 20a is once pressed in the B direction. Therefore, the planetary gear 12 is the mode switching gear 1.
5, the head base 20 is slightly returned by the force of the spring 21, and the mode switching gear 15 is returned clockwise by an angle β as shown in FIG. By returning the mode switching gear 15 by β in this manner, the edge Eb of the tooth 15b moves clockwise from the position shown in FIG. 8. This is because when changing from the REW mode to the play mode, when the planetary gear 12 moves in a clockwise orbit, the planetary gear 12 switches to the mode switching gear 1.
This is to make it easier to mesh with the teeth 15b of No. 5.

〔Effect of the invention〕

As described above, according to the present invention, the reel stand and the mode switching gear are driven by the planetary gear that revolves around the drive gear, so one motor rotates the capstan and the drive gear. By doing so, it becomes possible to drive not only a pair of reel stands but also a head base equipped with a magnetic head and a pinch roller. That is, only one motor is required as a power source, and a solenoid or the like is not required, making it possible to provide a simple and compact tape player at low cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view showing the overall structure of a tape player, and FIGS. 2 to 8 are plan views showing drive mechanism parts according to operation modes.
The figure shows REW mode, Figures 3 and 4 show switching from REW mode to play mode, Figure 5 shows play mode, and Figure 6 shows switching from REW mode to play mode.
The figures show switching from play mode to stop mode, REW mode or FF mode, FIG. 7 shows stop mode, and FIG. 8 shows switching from play mode or FF mode to REW mode. 1... Chassis, 2.3... Reel stand, 4.5...
・Reel gear, 6... Capstan, 7... Flywheel, 8... Belt, 9... Drive gear, 12.
...Planetary gear, 15...Mode switching gear, 15a...
・Tooth missing part, 15b...teeth, 16...switching cam,
20... Head base, 20a... Bent piece, 21
...Spring, 22...Pinch roller, H...
Magnetic head, M...motor. Applicant Alps Electric Co., Ltd. 2 Agent Patent attorney Teruo Nozaki
．． 5---Reel~Ya 6------Kear tongue 7-
---Fly main unit 9---M movement gear 12---Milk gear 5---Mode switching gear Y15q--False loss-----Switching cam 20--Head X-person 22
-1-Pinch roller H~--Vent head M-11 Motor Fig. 2 (REW mode) Fig. 3 (REW 7-Door array 7-de) Fig. 4 (REW 7-Doped mode) Fig. 5 ()0 lay 7-t...) Figure 6 Figure 7 (Stop mode) Figure 8

Claims (1)

[Claims] A capstan that is rotationally driven by a motor, a drive gear that rotates integrally with the capstan, and a drive gear that revolves around the drive gear according to the rotational direction of the drive gear while constantly meshing with the drive gear. A pair of reel gears arranged at positions where the planetary gears and the planetary gears rotated in normal rotation of the drive gear mesh with each other and at positions where the planetary gears rotated when the drive gear rotated in reverse mesh with each other, and a reel rotated by the reel gears. The base and the planetary gear are arranged so as to mesh with the planetary gear in the middle of a circular trajectory in which the planetary gear moves from a position where it meshes with one reel gear to a position where it meshes with the other reel gear, and the teeth are arranged so that they can be rotated by a certain angle by the planetary gear. a mode switching gear partially provided with a mode switching gear; a switching cam rotating together with the mode switching gear; and a mode switching gear being pushed by the switching cam and directed toward the reel stand while being rotated by a planetary gear. A tape player comprising: a head base that is movable and is provided with a magnetic head and a pinch roller facing the capstan.