JPH01204254A - Tape player - Google Patents

Abstract

PURPOSE:To eliminate the need for a solenoid, etc., and to simplify the mechanism by driving reel bases and a mode changeover gear with a planetary gear which revolves around a driving gear and rotating a capstan and the driving gear with one motor. CONSTITUTION:The changeover for all modes is feasible only by controlling a motor M in its forward and reverse rotation. That is, when the capstan 6 and the driving gear 9 are rotated by only one motor M, the planetary gear 12 revolves around this driving gear 9, and either of the reel bases 2 and 3 is rotationally driven by meshing the revolving planetary gear 12 with one pair of reel gears 4 and 5. Moreover, when the planetary gear 12 is revolved round by one way rotation of the motor M, it is meshed with the mode changeover gear 15 on the way of its revolution locus, and then the mode changeover gear 15 is rotationally driven accordingly. By this method, the need of a solenoid, etc., is eliminated, while only one motor M is enough for the drive, and hence the mechanism can be simplified.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a tape player installed in an answering machine, etc., in which a single motor drives a capstan, a pair of reel stands, and a head base. This invention relates to a tape player that can perform all of the above functions.

(Prior Art) The mechanisms that should be installed in the cassette drive unit of a tape player include driving a capstan, driving a pair of reel stands for driving tape reels, and driving a magnetic head toward and away from the tape. A device is required to drive the head base to move the pinch roller toward and away from the capstan. 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.

A conventional example of this type of tape player is disclosed in, for example, Japanese Utility Model Application No. 174038/1983.

[Problem to be solved by the invention]

However, conventional tape players equipped with one motor and one solenoid are still insufficient to simplify the mechanism and reduce costs, and simple tape players used in answering machines, etc. The cost of manufacturing has become too high.

The present invention not only rotates the capstan and a pair of reel stands, but also drives the head base with just one motor.Moreover, the mechanism is simplified and can be manufactured at low cost. The purpose is to provide a tape player. Another object of the present invention is to make it possible to set a review mode or a reverse play mode in a tape player with a simplified mechanism that can be driven by only one motor.

[Means to solve the problem]

In order to achieve the above object, the tape player of 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 rotates in the direction of rotation of the drive gear while constantly meshing with the drive gear. The planetary gear that revolves around the drive gear according to the rotation of the drive gear in one direction meshes with the planetary gear that is rotated in one direction, and the planetary gear that revolves when the drive gear rotates in the opposite direction meshes. A pair of reel gears arranged at respective positions, a reel stand rotated by the reel gears, and a planetary gear so as to mesh with the planet gear in the middle of a circular trajectory moving 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 which is disposed in the reel table and partially provided with teeth so that it can be rotated by a certain angle by the planetary gear; A head base is provided with a head and a pinch roller facing the capstan, and is arranged coaxially with a mode switching gear and presses the head base while the mode switching gear is rotated in one direction by a planetary gear. a first switching cam that sets the play mode by pressing the pinch roller against the capstan and bringing the magnetic head into contact with the magnetic tape; The review mode is set by pressing the head base while the switching gear is being rotated in the opposite direction to switching to the play mode and lightly touching the magnetic head with the magnetic tape while the pinch roller is away from the capstan. It consists of two switching cams.

Further, in the tape player of the present invention, in the above configuration, a second switching cam having the same rotation radius as the first switching cam is provided in place of the second switching cam having a smaller rotation radius than the first switching cam. , while the mode switching gear is rotated in the opposite direction to the switching to the play mode, this second switching cam presses the head base to press the pinch roller against the capstan and bring the magnetic head into contact with the magnetic tape. This is to set the reverse play mode.

Further, when the mode switching gear has been driven in one direction by the planetary gear and the first switching cam has completed pressing the head base, and when the planetary gear has completed driving the mode switching cam in the opposite direction and The mode switching gear may be provided with a stopper that is hooked to the head base and restricts rotation of the mode switching gear when the second switching cam completes pressing the head base.

[For production]

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 made to revolve by roughly rotating the motor in one direction, it engages with the mode switching gear in the middle of its orbit, and the mode switching gear is rotationally driven. As the mode switching gear rotates, the first switching cam presses and drives the head base, and the magnetic head on the head base moves to a position where it contacts the tape, and the pinch roller contacts the capstan. The play mode is set. 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.

Further, when the motor is reversed from this position and the planetary gear is made to revolve in the opposite direction, it engages with the mode switching gear again in the middle of its orbit, and the mode switching gear is rotationally driven in the opposite direction. In the first half of the rotation of the mode switching gear, the first switching cam is disengaged from the head base, the head base is returned, and the magnetic head and pinch roller are separated from the tape and capstan. Furthermore, in the latter half of the rotation of the mode switching gear, the second switching cam presses the head base. After this operation is completed, the planetary gear moves away from the mode switching gear and meshes with the reel gear on the side opposite to the play mode, and the reel stand is driven together with this reel gear. At this time, if the rotation radius of the second switching cam is smaller than that of the first switching cam, the head base advances to a position where the pinch roller is away from the capstan but the magnetic head lightly contacts the magnetic tape. becomes.

At this time, the tape is rewound at high speed by the reel stand and a review operation is performed. Further, when the rotation radius of the second switching cam is the same as the first rotation radius, when the head base is pushed by the second switching cam, the magnetic head contacts the magnetic tape and the pinch roller moves to the capstan. It comes into pressure contact with the At this time, by winding the tape in the opposite direction to the play mode using the reel stand, the mode can be switched to the reverse play mode.

Furthermore, when the first switching cam completes pressing the head base, or when the second switching cam completes pressing the head base, the stopper provided on the mode switching gear is latched onto the head base. By doing this, the rotational position of the mode switching gear is locked, and when the planetary gear that has been separated from the mode switching gear returns to its original position, this planetary gear can surely mesh with the mode switching gear. .

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

(First Embodiment) FIG. 1 is a perspective view showing a first embodiment of a tape player according to the present invention, and FIGS. 2 to 6 are plan views showing switching operations to each mode in the tape player of the first embodiment. It is a diagram.

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

Structure of a Tape Player In FIG. 1, reference numeral 1 denotes a chassis made of sheet metal. This chassis 1 has a side cross section 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 reel gear 4 is provided at the base of the reel stand 2 on the winding side, and a reel gear 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 the tape tensicon acts on the reel stand 2 or 3, the reel stand 2 .3 and reel gear 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. 1 on the side of chassis 1
A belt 8 is placed between the drive pulley of the motor M and the flywheel 7, so that the motor M rotates the capstan 6 together with the flywheel 7. There is. 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 11a provided on the shaft 11a and the planetary gear 12 which rotates while being supported by the shaft 11a, and due to the presence of this load, the capstan 6 and the drive gear 9 When you rotate in that direction,
The idle arm 11 follows the direction of rotation, 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. 3), and when the drive gear 9 rotates counterclockwise, , the planetary gear 12 reaches a position where it meshes with the supply side gear gear 5 (see FIG. 5).

A mode switching gear 15 is provided below the upper installation surface 1b of the chassis 1. This mode switching gear 15 is arranged at a position where the planetary gear 12 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 configured to move along a circular trajectory without driving the mode switching gear 15.

A first switching cam 16 is provided on the top surface of the mode switching gear 15.
and a second switching cam 17 are provided. As shown in FIG. 2, the radius of the second switching cam 17 is the same as that of the first switching cam 1.
It is formed to be smaller than the radius of 6 by a slight dimension t. Further, a stopper 18 is provided to protrude from the lower edge of the toothless portion 15a of the mode switching gear 15 toward the back surface. The positional relationship between this stopper 18 and each switching cam 16 and 17 is as shown in FIG.

A head base 2 is mounted on the upper surface of the upper installation surface 1b of the chassis 1.
0 is set. This head base 20 includes positioning pins 19a provided on the upper installation surface 1b of the chassis 1;
19b, etc., and is slidable in the direction A-B. A spring 21 is interposed between the rear end of the head base 20 and the chassis 1, and the spring 21 biases the head base 20 in the direction B. Also, a bent piece 20a is provided at the rear end of the head base 20.
is formed by bending, and this bent piece 20a extends to a position facing the first switching cam 16 and the second switching cam 17. A pinch 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)
are loaded while being positioned by positioning bins 19a and 19b. The tape reels in the cassette half are placed on each reel stand 2 and 3.

Stop Mode FIG. 2 shows the stop mode. At this time, the first switching cam 16 and the second switching cam 17 on the mode switching gear 15 have come off the bent piece 20a of the head base 20, and the head base 20 is pulled in the direction B by the force of the spring 21. ing. When the head base 20 is in this position, the magnetic head H is separated from the magnetic tape in the cassette half, and the pinch roller 22 is separated from the capstan 6.

Switching from stop mode to play mode When switching from the stop mode shown in Figure 2 to the recording or playback mode (play mode), drive the motor clockwise in the state shown in Figure 2 (as shown by the dashed arrow in Figure 2). (Illustrated in ).

When the drive gear 9 is driven clockwise by the motor M, the planetary gear 12 receives a clockwise rotating force and meshes with the teeth 15b of the mode switching gear 15 reliably. The power of the motor M is transferred to the drive gear 9 and the planetary gear 12.
The signal is transmitted to the mode switching gear 15 via the mode switching gear 15, 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. When the mode switching gear 15 is rotated to the position shown in FIG.
a moves to the position of the planetary gear 12, and the planetary gear 12 can now separate from the edge Ea of the tooth 15b of the mode switching gear 15. Planetary gear 22 away from edge Ea
continues to rotate clockwise around the drive gear 9, and the third
As shown in the figure (play mode), the planetary gear 12 reaches a position where it meshes with the winding side glue gear 4. During the period from FIG. 2 to FIG. 3, the first switching cam 16 rotates clockwise together with the drive gear 15 rotating clockwise.
This first switching cam 16 comes into contact with the bent piece 20a of the head base 20, and the head base 20 is pushed out in the direction A against the force of the spring 21. During this switching operation, the planetary gear 12 separates from the edge Ea of the tooth 15b, but at this time, the stopper 18 provided on the mode switching gear 15 hits the right edge of the bent piece 20a of the head base 20. Therefore, in the play mode shown in FIG. 3, the mode switching gear 15 can no longer rotate clockwise, and the edge Ea of the tooth 15b no longer moves clockwise. Therefore, in the later mode switching operation, when the planetary gear 12 rotates counterclockwise, the planetary gear 12
It becomes possible to reliably engage with the edge Ea of 5b. Further, since the stopper 18 is hooked to the edge of the bent piece 20a, the head base 20 can be positioned.

In the play mode shown in FIG. 2, 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.

In this way, the magnetic head H performs a recording or reproducing operation on the tape T, which is caused to travel rightward in the figure by the capstan 6.

As the magnetic head H, for example, one in which a recording/reproducing head and an erasing head are integrated is used. Both heads may be provided in the same case, or the two heads may be joined.

Canceling the play mode To cancel the play mode shown in FIG. 3, the rotation direction of the motor M is switched 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 Furthermore, the planetary gear 12 rotates counterclockwise until it meshes with the edge Ea of the tooth 15b of the mode switching gear 15. Planetary gear 12 is tooth 1 of mode switching gear 15
5b, the power of the motor M is then transmitted from the drive gear 9 to the mode switching gear 15 via the planetary gear 12, and the mode switching gear 15 is driven counterclockwise.

The position of the planetary gear 12 at this time is shown by a broken line in FIG. Further, the rotation direction of each gear at this time is as shown by the broken line arrow in FIG. When the mode switching gear 15 rotates to the angle shown in FIG.
6 is released, the head base 20 is returned to the right by the force of the spring 21, the magnetic head H retreats to a position where it does not touch the tape T, and the pinch roller 22 is moved away from the capstan 6. Leave. A device for detecting the rotation angle of the mode switching gear 15 is provided,
If the motor M is stopped when the state shown in FIG. 4 is reached, the stop mode is entered.

Changing to FF mode When shifting to tape fast-forward mode (FF mode), the motor M is reversed clockwise from the state shown in FIG. 4 (the direction of rotation at this time is indicated by a solid arrow in FIG. 4). As the drive gear 9 rotates clockwise, the planetary gear 12 rotates clockwise around the drive gear 9, leaving the mode switching gear 15 and meshing with the reel gear 4. At this time, the head base 20 remains retracted to the right as shown in FIG. 4, so 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
is driven clockwise, and the reel stand 2 winds up the tape. At this time, the motor M is driven at high speed, and the tape T is made to run at high speed.

Switching to review mode Review mode refers to a state in which the tape is rewound at high speed and the magnetic head H is in light contact with the tape T.

This review mode makes it possible to control the cue of the recorded content.

This switching to the review mode is performed from the FF mode shown by the solid line in FIG. 4 or the stop mode in which the planetary gear 12 is in the position shown by the broken line.

When the motor M is driven counterclockwise at the position shown in FIG. 4, the drive gear 6 is driven counterclockwise. Therefore, the planetary gear 12 receives a counterclockwise rotating force, and this force causes the planetary gear 12 to mesh with the teeth 15b of the mode switching gear 15. When the motor M continues to rotate counterclockwise, the planetary gear 12 continues to rotate at the position shown by the chain line in FIG. 4, and the mode switching gear 15 is driven counterclockwise. When the mode switching gear 15 rotates to the angle shown in FIG. 5, the tooth missing portion 15a moves to the position of the planetary gear 12, and the planetary gear 12 comes off from the edge Eb of the tooth 15b.
The planetary gear 12 continues to revolve around the drive gear 9 in the counterclockwise direction and meshes with the reel gear 5 on the left side in the figure.

As shown in FIG. 5, the planetary gear 12 is connected to the mode switching gear 1.
When the mode switching gear 15 is separated from the tooth tsb of
A stopper 18 provided on the head base 20 is hooked to the left edge of the bent piece 20a of the head base 20.

Therefore, the mode switching gear 15 can no longer rotate counterclockwise, and the edge Eb of the tooth 15b is restricted from moving counterclockwise any further. Therefore, when the planetary gear 12 rotates clockwise in the subsequent switching operation, the planetary gear 12 can reliably mesh with the edge Eb of the tooth 15b. Further, the head base 20 is also positioned by the stopper 18.

During the transition to the state shown in FIG.
The second switching cam 17 provided in the head presses the bent piece 20a of the head base 20, and the head base 20 is moved in the A direction. However, since the rotation radius of the second switching cam 17 is smaller than that of the first switching cam 16 used for switching to the play mode by t (
(see FIG. 2), the amount of movement of the head base 20 in the direction A in FIG. 5 is slightly shorter than the amount of movement of the head base 20 in the play mode shown in FIG. Therefore, when the head base 20 moves in the direction A, the pinch roller 22 separates from the capstan 675), so that the rotational force of the capstan 6 is not transmitted to the tape T. Further, the magnetic head H is in light contact with the tape T (in the play mode shown in FIG. 3, the magnetic head H is in contact with the tape T to the extent that it bends). When the motor M is driven counterclockwise in the state shown in FIG. is rewound. At this time, the rotational speed of the motor M is switched to high speed.

While the tape T is rewound at high speed in this manner, the recording signal on the tape T is read by the magnetic head H, thereby making it possible to start the recording.

Switching to REW mode When switching to REW mode, motor M is rotated clockwise from the review mode shown in FIG.

The drive gear 9 rotates clockwise, the planetary gear 12 rotates clockwise, and the planetary gear 12 rotates to the tooth 1 of the mode switching gear 15.
It meshes with 5b. As the motor M rotates, the mode switching gear 15 rotates clockwise. Then, the second switching cam 17 comes off from the bent piece 20a of the head base, and
The head base 20 is returned in the direction B by the force of the spring 21, and the magnetic head H is separated from the tape T (see FIG. 6). Then, when the motor M is driven counterclockwise again and the drive gear 9 is rotated counterclockwise, the planetary gear 12 located at the position indicated by the broken line in FIG. 6 rotates counterclockwise and meshes with the reel gear 5. reach the position. Motor M
The rotational force 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 Rh in the cassette half rotates counterclockwise, and the tape is rewound. At this time, the rotational speed of the motor M is high, and the tape T is rewound at high speed.

(Second example) Next, a second embodiment of the present invention will be described with reference to FIG.

FIG. 7 shows the case where the tape player of the second embodiment is in reverse play mode.

This second embodiment is different from the first embodiment described above in the shape of the second switching cam. In this second embodiment, the second switching cam 27 and the first switching cam 16 have a substantially symmetrical shape, and the rotation radius of the second switching cam 27 is the same as that of the first switching cam 16. ing. Further, in this second embodiment, two magnetic heads Ha and Hb are mounted on the head base 20. These two magnetic heads Ha and Hb are
It is arranged at a symmetrical position with respect to the capstan 6.

One magnetic head Ha is for normal play, and the other magnetic head Hb is for reverse play. Each of the heads Ha and Hb is a combination of a recording/reproducing head and an erasing head. The recording/reproducing head and the erasing head may be integrated or may be two pieces joined together. Further, the pinch roller 22a and the capstan 6 mounted on the head base 20 are disposed opposite to each other so that their axes are located on the same line.

In this second embodiment, stop mode, play mode,
The FF mode, REW mode, etc. are set by the same operation as in the first embodiment. That is, during the same switching operation as in the state shown in FIG. 3 in the first embodiment, the first switching cam 16 presses the head base 20 in the direction A, and the head H
a and Hb come into contact with the tape, and the tape reel Ra is driven by the take-up reel stand 2, causing the tape to travel rightward in the figure. At this time, a recording or reproducing operation is performed by the magnetic head Ha for normal play.

Next, the settings for the reverse play mode shown in Figure 7 are as follows:
Switching is performed by the same operation as the review mode shown in FIG. 5 in the embodiment. That is, when the mode switching gear 15 is driven counterclockwise by the planetary gear 12, the head base 20 is pushed out in six directions by the second switching cam 27. In the first embodiment, since the rotation radius of the second switching cam 17 is small, the review mode is set as shown in FIG. 5, but in the second embodiment, the second switching cam 2
7 has the same rotation radius as the first switching cam 16, the head base 20 advances greatly in the direction A, both magnetic heads Ha and Hb come into contact with the tape T, and the pinch roller 22a is pressed against the capstan 6. Ru. At this time,
The reel stand 3 on the supply side is driven counterclockwise at low speed by a motor M, and the tape T is sent out to the left in the figure by a capstan 6 rotating counterclockwise. Recording or reproducing operation is then performed by the reverse magnetic head Hb.

In the embodiment shown in FIG. 7 as well, the stopper 18 provided on the mode switching gear 15 is connected to the bent piece 2 of the head base 20 in the play mode and the reverse play mode.
It is hooked to the left edge of 0a, and rotation of the mode switching gear 15 is prevented.

Furthermore, switching to other modes is the same as in the first embodiment.

(Effects 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. By rotating the drive gear, it is possible to drive not only a pair of reel stands but also a head base equipped with a magnetic head and a pinch roller.In other words, only one motor is required as a power source, and a solenoid etc. This makes it possible to provide a simple and compact tape player at low cost.

Further, in the invention as set forth in claim 1, since the second switching cam having a smaller radius than the first switching cam is provided, it is also possible to set the review mode.

In the invention as claimed in claim 2, since the second switching cam having the same radius as the first switching cam is provided, it is also possible to set a reverse play mode.

In the third aspect of the invention, the mode switching gear is positioned so that when the planetary gear rotates from the play mode etc., the planetary gear meshes with the mode gear reliably.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG.
A perspective view showing the overall structure of a tape player according to an embodiment,
2 to 6 are plan views showing the drive mechanism portion of the tape player according to the first embodiment according to the operation mode, FIG. 2 is the stop mode, FIG. 3 is the play mode, and FIG. 4 is the F mode.
F mode, FIG. 5 is review mode, and FIG. 6 is REW mode. FIG. 7 shows the drive mechanism of the tape player according to the second embodiment, and is a plan view showing the reverse play mode. 1... Chassis, 2.3... Reel stand, 4.5...
・Reel gear, 6... Capstan, F... Flywheel, 8... Belt, 9... Drive gear, 12.
...Planetary gear, 15...Mode switching gear, 15a=.
Tooth missing portion, 15b...Teeth, 16...First switching cam, 17°27...Second switching cam, 18...Stopper, 20...Head base, 20a... Bending piece, 21... Spring, 22... Pinch roller, H
...Magnetic head, M...Motor. Figure 2 (Stop mode) Figure 3 (Push mode) -Rt) RQ Figure 4 (FF mode μ) Figure 6 (REW mode) -') Ball

Claims (1)

[Claims] 1. A capstan that is rotationally driven by a motor, a drive gear that rotates integrally with the capstan, and a drive gear that rotates around the drive gear according to the rotational direction of the drive gear while constantly meshing with the drive gear. A pair of orbiting planetary gears are arranged at a position where the orbiting planetary gear meshes with the orbiting planetary gear when the drive gear rotates in one direction, and a position where the orbiting planetary gear meshes when the drive gear rotates in the opposite direction. A reel gear, a reel stand rotated by the reel gear, and a planet gear 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 so as to be rotated by a certain angle; a pinch roller provided movably in a direction toward and away from the reel stand and facing the magnetic head and the capstan; a head base which is arranged coaxially with the mode switching gear, and which presses the head base while the mode switching gear is rotated in one direction by the planetary gear to press the pinch roller against the capstan and magnetically A first switching cam that sets the play mode by bringing the head into contact with the magnetic tape, and a mode switching cam that is formed with a smaller rotation radius than the first switching cam and that uses a planetary gear to switch the mode switching gear in the opposite direction to switching to the play mode. a second switching cam that presses the head base while being rotated to lightly contact the magnetic head with the magnetic tape while the pinch roller is separated from the capstan to set a review mode; 2. In the tape player according to claim 1, a second switching cam having the same rotation radius as the first switching cam is provided in place of the second switching cam having a smaller rotation radius than the first switching cam, and a second switching cam having the same rotation radius as the first switching cam is provided. While the switching gear is rotated in the opposite direction to the switching to the play mode, this second switching cam presses the head base, presses the pinch roller against the capstan, and brings the magnetic head into contact with the magnetic tape to perform reverse play. Tape player setting mode. 3. When the planetary gear has completed driving the mode switching gear in one direction and the first switching cam has completed pressing the head base, and when the planetary gear has completed driving the mode switching cam in the opposite direction, and Claim 1 or Claim 2, wherein the mode switching gear is provided with a stopper that is hooked to the head base and restricts rotation of the mode switching gear when the second switching cam completes pressing the head base. tape player.