JPH0258696B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a cassette-type tape player, and particularly to a so-called autoloading type tape player in which a cassette is automatically loaded and unloaded.

(2) Prior art and its problems In order to automatically load and unload a cassette in a cassette tape player, the most common method is to use the driving force of the tape drive motor as the drive source for loading and unloading the cassette. It is true. That is, when loading a cassette into the pack guide provided in the tape player, a switch located inside the pack guide detects this and transfers the driving force of the tape drive motor to the gear or other device. After the cassette is automatically pulled into the tape player and set at a predetermined playing position, the connection between the motor and the pack guide is released. On the other hand, during attachment/detachment, when an eject signal for detachment is given to the tape player, the tape drive motor and the pack guide section are reconnected, and the force of this motor causes the pack guide section to move in the opposite direction to that at the time of attachment. The tape player is then sent out, and the cassette is also sent out at the same time.

In this way, when installing and removing the cassette,
Since it is necessary to move the pack guide portion in the opposite direction, a motor serving as a driving source is required to be capable of reversible operation. Therefore, conventionally,
In tape players that use DC power, such as car stereos, the polarity of the power supplied to the motor is switched, and the
The direction of rotation of the motor was changed.

However, in such conventional tape players, it is inevitable that the rotation direction of the motor is opposite when driving the tape and when loading/unloading the cassette. The motor suddenly reverses, and the resulting inertia of the motor generates a reverse current, which has the disadvantage of causing failure of the motor and changeover switch.

Therefore, recently, a switching mechanism has been installed between the motor and the pack guide section without changing the direction of rotation of the motor, and this switching mechanism allows the direction of rotation of the motor to be changed between the pack guide section and the pack guide section. Techniques for reversing the driving force of the motor being transmitted are also available.

It is true that by doing this, there is no generation of reverse generation current due to reversal of the motor, and there is no risk of failure of the motor or switches. However, in the conventional switching mechanism, the motor and the pack guide were always connected to either the mounting side or the removal side, so the pack guide would overrun due to the inertia of the motor, causing the cassette to overrun. This resulted in the inconvenience that the instrument was not set at the correct playing position. Furthermore, if the motor and the pack guide are always connected by a switching mechanism, it becomes necessary to use a dedicated motor for loading and unloading the cassette, or to use the motor for playing a tape player as the drive source for loading and unloading the cassette. To use this, it is necessary to use a separate clutch mechanism or to separate the tape drive mechanism from the cassette loading/unloading mechanism by letting the gear spin idle when a certain amount of torque is applied, which makes the entire mechanism complicated. It was hot too.

(3) Purpose of the Invention The present invention was proposed to solve the above-mentioned drawbacks of the prior art.The purpose of the present invention is to change the driving force of a motor rotating in a fixed direction to the one when the motor is mounted and the other by using a switching mechanism. The information is transmitted to the pack guide section in the reverse direction when it is attached or detached, and this switching mechanism is also used when attaching, neutral, or
It has a simple structure that allows three different positions for attachment and detachment to prevent the pack guide from overlining due to inertia of the motor, and does not require the use of other clutch mechanisms or a dedicated motor for attachment.
To provide a cassette loading/unloading device for a tape player which can load a cassette at an accurate playing position.

(4) Summary of the Invention The cassette loading/unloading device of the present invention is provided with a motor that rotates in a fixed direction as a drive source for the pack guide section, and the motor is installed between the motor and a slide plate for moving the pack guide section. A switching mechanism is provided to reverse the rotation direction.

In particular, the present invention provides a switching mechanism in which a switching plate is rotatably disposed close to a drive gear that interlocks with the motor, and the switching plate is provided with a switching gear that meshes with the driving gear as the switching plate moves. At the same time, a cam having three concave portions, a mounting part, a neutral part, and a detaching part, is formed on this switching plate, and a pin that engages with this cam is linked to a plunger, and this plunger is linked to a pack guide part. By operating the slide plate according to the position of the slide plate, the switching gear on the switching plate is engaged with or disengaged from the drive gear on the motor side.

(5) Embodiment A of the invention Configuration The configuration of an embodiment of the invention will be specifically described below with reference to the drawings.

(Pack Guide Section) In FIGS. 1 and 2, reference numeral 1 denotes a pack guide disposed on the board of the tape player so that it can be raised and lowered. is supported by the tip of the This guide arm 2 is rotatably attached to the side plate 4 of the tape player at the support shaft 3 provided at both ends of the back, and its front end is horizontal with the support shaft 3 as the center. It is designed to be able to rotate from the state to the descending state. The tip of the guide arm 2 and the upper surface of the pack guide 1 are movably connected, and as the guide arm 2 moves up and down, the pack guide 1 moves up and down on the board of the tape player.

That is, the side plate 4 of the tape player has a
A slide plate 5 with a U-shaped cross section that surrounds the
is supported slidably in the front and rear directions, and a guide pin 7 protruding from the side surface of the guide arm 2 is inserted into an elevating cam 6 provided on the side plate of the slide plate 5. This elevating cam 6 includes two tapered cams for raising and lowering, and as the slide plate 5 moves back and forth, the guide pin 7 is pressed by the tapered cam, so that the guide arm 2 moves up and down around the support shaft 3.

A guide hole 8 extending back and forth is formed at the center of the upper surface of the guide arm 2, and a plastic stopper 9 is slidably fitted into the guide hole 8. This Patsuku Totsupa 9
The front end of the pack guide 1 extends to the center of the upper surface of the pack guide 1, and the lower surface thereof is provided with a claw 9a that engages with the reel shaft insertion hole of the cassette. Also,
At the rear end of the pack stopper 9, there is provided a stopper piece 9b which projects downward, and which comes into contact with the tip of the cassette inserted into the pack guide 1.

On the other hand, on the upper edge of the side plate 4 of the tape player,
A horizontal portion is formed to support the upper horizontal portion of the slide plate 5, and a center corner portion of a substantially L-shaped swing lever 10 is pivotally mounted on this horizontal portion. The tip of one arm of the swing lever 10 is branched into a U-shape, and this portion engages with a pin 11 provided on the upper surface of the pack stopper 9 in a freely sliding manner. Further, a guide roller 12 is provided at the tip of the other arm of the swing lever 10 to protrude upward, and this guide roller 12 is inserted into a loading/unloading cam 13 formed in the upper horizontal part of the slide plate 5. There is. Like the elevating cam 6, this loading/unloading cam 13 is also formed of two tapered cams on the loading side and the loading/unloading side, and these tapered cams press the guide roller 12 as the slide plate 5 moves back and forth. , the swing lever 10 is rotated around the corner thereof, and the pack stopper 9 is engaged with the tip of the swing lever 10.
is adapted to be moved back and forth along the guide hole 8 of the guide arm 2.

(Drive Mechanism Section) A rack 14 is formed on the side edge of the lower horizontal portion of the slide plate 5, and for this rack 14,
Gears on the drive mechanism side rotated by the tape drive motor are engaged. That is, this drive mechanism section has a configuration as shown in FIG.
and a detachable drive gear 16, a gear 17 that meshes with the rack 14 of the slide plate 5, a reduction gear group 18 for rotating this gear 17 at a predetermined speed,
and a switching mechanism for meshing the reduction gear group 18 with either the mounting-side drive gear 15 or the removal-side drive gear 16.

Of these, the loading side drive gear 15 and the loading/unloading side drive gear 16 mesh with each other and rotate in opposite directions. are connected by means of transmission.

(Switching mechanism) On the other hand, the reduction gear group 18 is connected to the installed drive gear 15.
Alternatively, a switching mechanism for meshing with either one of the attachment/detachment drive gears 16 and reversing the rotational direction of the reduction gear group 18 has the following configuration.

First, a transmission gear 20 is rotatably attached to a support shaft provided on a substrate 19 of the switching mechanism, and this transmission gear 20 is always meshed with a gear on the input side of the reduction gear group 18. At the same time, the center portion of a switching plate 21 is pivotally attached to the support shaft of the transmission gear 20, and a mounting side switching gear 22 and a removing side switching gear 23 provided on the switching plate 21 are connected to the transmission gear 20. They are interlocked with each other from both sides. In this case, the mounting-side switching gear 22 and the mounting-side switching gear 23 on the switching plate 21 are provided at positions corresponding to the mounting-side drive gear 15 and the mounting-side drive gear 16, and the switching plate 21 is centered around its support shaft. As the device rotates, the mounting-side drive gear 15 and the mounting-side switching gear 22, or the mounting-side driving gear 16 and the mounting-side switching gear 23 alternately mesh with each other.

(Pressing Means for Switching Plate 21) A reversing plate 25 is connected to the base end of the switching plate 21 via a reversing spring 24. This inversion plate 25 as a whole has V
It is a member shaped like a letter, and is pivotally attached to the base plate 19 of the switching mechanism at the V-shaped neck.
A torsion spring type reversing spring 24 is attached between the tip of one arm of the reversing plate 25 and the base end of the switching plate 21. In this case, the reversing plate 25 and the reversing spring 24 are attached by inserting the end of the reversing spring 24 rotatably into a through hole bored at the tip of the reversing plate 25, and also attaching the reversing plate 25 and the reversing spring 24 to each other. For installation with switching plate 21
The end of a reversing spring 24 having a hook-shaped tip is rotatably engaged around a shaft fixed to the base end of the reversing spring 24.

On the other hand, a slit 26 is bored in the other arm of the V-shaped reversing plate 25 along the length of the arm, and a pin 27 provided on the slide plate 5 of the loading/unloading mechanism slides into the slit 26. It is inserted freely. That is, the slide plate 5 is a member having a substantially U-shaped cross section, and a pin 27 is provided at the tip of the inner side of the lower horizontal part of the slide plate 5 to project downward, and this pin 27 is inserted into the slit 26 of the reversing plate 25.
inserted inside.

(Cam 33 and plunger 29) A rotary lever 2 is provided at the tip of the switching plate 21.
A plunger 29 is connected via 8.
That is, at the tip of the switching plate 21, a mounting portion 30,
An arc-shaped cam 33 having three recesses, a neutral part 31 and a detachable part 32, is bored.
3, a pin 3 protruding from one end of the rotating lever 28
4 has been inserted and is in an engaged state.

Note that a protrusion 35 is provided at the center of the arc-shaped cam 33 facing the neutral portion 31;
The pin 34 moving inside the cam 33 is always in the neutral part 3.
It is starting to move into 1.

The pivot lever 28 is pivotally attached to a support shaft fixed to the base plate 19 at its center, and connected to the core tip of the plunger 29 at its end opposite to the switching plate 21 . Further, between the rotary lever 28 and the base plate 19, a rotary lever 28 is provided opposite to the pulling direction of the plunger 29.
A spring 36 is tensioned to bias the .

(Switch mechanism of plunger 29) By the way, this plunger 29 is used to operate the cassette when inserting the cassette into the pack guide 1, when the setting of the cassette to the playing position is completed, when the cassette starts to be removed from the playing position, and when the cassette is completely removed from the playing position. A pulse current is supplied four times, and the rotating lever 28
It is a driving force behind this. In order to supply these four pulse streams, the tape player of this embodiment is provided with the following switch.

First, a lever SW1 is provided at the back of the pack guide 1 and rotates as a cassette is inserted into the pack guide 1.
The insertion of the cassette is detected by the rotation of the plunger 29, and power is supplied to the plunger 29.

Switch to complete setting of cassette
SW2 is provided at the inner part of the side plate 4 of the tape player, and is at a position where the switch SW2 is activated when the slide plate 5 moving on the side plate 4 reaches the inner end thereof.

The switch for starting the loading/unloading of the cassette is provided on the front of the escutcheon (not shown) of the tape player, and is activated by manually pressing it by the operator of the tape player.
It is something that excites.

A switch SW4 for completing the attachment/detachment of the tape player is provided on the front side of the side plate 4 of the tape player.
It is activated when the slide plate 5 moving above reaches the front side thereof.

B. Effect Next, the effect of the apparatus of this embodiment having the above-mentioned configuration will be explained.

(Before installing the cassette...Figure 3) Before installing the cassette, slide plate 5
is located on the front side of the side plate 4, and the guide arm 2 is in the raised position by being pressed by the lifting cam 6 provided on the slide plate 5. Therefore, the pack guide 1 supported at the tip of the guide arm 2 is also supported in a floating state above the playing position of the cassette. At the same time, since the loading/unloading cam 13 provided on the slide plate 5 pulls the guide roller 12 of the swing lever 10 outward, the tip of the swing lever 10 is located in front of the guide arm 2, and the swing lever 1
The pack stopper 9, which is engaged with the tip of the guide hole 8, is also stopped in front of the guide hole 8.

On the other hand, in this state, since the slide plate 5 has come to the front side, the reversing plate 25, which is engaged with the slide plate 5 via the pin 27, has also rotated to the front side. Therefore, the reversing spring 24 connected to the reversing plate 25 is V
It is located inside the letter-shaped reversing plate 25, and the base end of the switching plate 21 is pressed to the right side in the figure by the reversing spring 24. However, the switching plate 2
At the tip of 1, a cam 3 provided on the switching plate 21
Since the pin 34 on the rotating lever 28 side is engaged with the neutral portion 31 of No. 3, the switching plate 21 cannot be rotated beyond a certain limit. Therefore, neither of the two gears, the mounting side switching gear 22 and the detaching side switching gear 23 on the switching plate 21, can mesh with the mounting side drive gear 15 or the detaching side drive gear 16. As a result, as the motor rotates, the mounting side drive gear 15 and the removal side drive gear 16
Even if the cassette is constantly rotating, its rotational force is not transmitted to the cassette loading/unloading device.

(When starting to install the cassette...Fig. 4) When the cassette is inserted into the pack guide 1,
A lever SW1 provided at the back of the pack guide 1 detects this, and a switch linked to this lever SW1 is activated to supply a pulse current to the plunger 29.

Then, the plunger 29 is excited, its core is attracted, and the rotating lever 28 engaged with the core is rotated. With this rotation of the rotation lever 28, the pin 3 provided at the other end of the rotation lever 28
4 and the neutral portion 31 of the cam 33 are disengaged,
The switching plate 21 is in a free state.

However, since the switching plate 21 is pressed clockwise by the reversing spring 24 connected to its base end, the switching plate 21 rotates about its spindle, causing the switching plate 21 to rotate. The mounting side switching gear 22 meshes with the mounting side drive gear 15. As a result, the rotational force of the motor is transmitted to the mounting side drive gear 15, the mounting side switching gear 22, and the transmission gear 20.
The signal is transmitted to the reduction gear group 18, and the gear 17 provided at the output end of the reduction gear group 18 rotates at a predetermined speed. Since the gear 17 is engaged with the rack 14 on the side of the slide plate 5, the slide plate 5 starts moving toward the back of the tape player.

(During installation of a cassette...Fig. 5) When the slide plate 5 starts moving, the loading/unloading cam 13 provided on the slide plate 5 presses the guide roller 12, and the swing lever moves toward the back of the tape player. Rotate the tip of 10. Then, the pack stopper 9 engaged with the tip of the swing lever 10 is also pulled toward the back of the tape player, but the reel shaft insertion hole of the cassette is engaged with the pawl 9a provided at the front end of the pack stopper 9. Because it matches, Patsukutotsupa 9
The cassette is pulled to the inner part of the pack guide 1.

Even after the cassette reaches the inner part of the pack guide 1, the slide plate 5 moves further to the inner part.
presses the guide pin 7 of the guide arm 2 downward. As a result, the guide arm 2 descends around the support shaft 3, and the pack guide 1 connected to the tip of the guide arm 2 also descends with the cassette stored therein, and the cassette is set at its playing position.

As the slide plate 5 moves in this manner, the pin 27 provided at the tip of the slide plate 5 slides within the slit 26 of the reversing plate 25, causing the reversing plate 25 to move counterclockwise in the figure around its spindle. Rotate. Then, one arm of the slide plate 5 moves past the base end of the switching plate 21 to the opposite side, and the reversing spring 24 provided between the slide plate 5 and the switching plate 21
However, the base end of the switching plate 21 is reversed as an axis, and the switching plate 21 is pressed counterclockwise in the opposite direction.

However, in this state, the pin 34 of the rotating lever 28 is attached to the mounting portion 3 of the cam 33 provided on the switching plate 21.
0, the switching plate 21 stops at the same position as before against the force of the reversing spring 24, and therefore the mounting side switching gear 22 on the switching plate 21 and the mounting side on the motor side The meshing with the drive gear 15 is maintained, and the slide plate 5 continues to move toward the back of the tape player by the driving force of the motor.

(Completion of cassette installation...Fig. 6) When the cassette is set to the playing state and the slide plate 5 reaches the inner end, the slide plate 5 operates the switch SW2 and the plunger 29 is energized again for a short time. . This plunger 2
9, the core of the plunger 29 is attracted and the rotating lever 28 is rotated, so that the pin 34 and the cam 33 provided at the tip of the rotating lever 28 are
is disengaged from the mounting portion 30. Then, the switching plate 21 is rotated counterclockwise by the force of the reversing spring 24, and the mounting side switching gear 22 on the switching plate 21 and the mounting side drive gear 15 are disengaged, and the driving force from the motor is removed. It is no longer transmitted to the gear 17, and the movement of the slide plate 5, which meshes with the gear 17 at the rack 14, also stops.

The pin 34, which is disengaged from the attachment part 30 due to the suction of the plunger 29, moves inside the cam 33 toward the detachment part 32 side as the switching plate 21 rotates. The protrusion 35 is formed opposite to the neutral part 31 of the cam 33, and since the rotating lever 28 to which the pin 34 is fixed is pulled by the spring 36, the neutral part 31 of the cam 33
Go inside and engage its edges. the result,
The switching plate 21 stops at a neutral point against the force of the reversing spring 24, and the mounting side switching gear 22 and the removal side switching gear 23 on the switching plate 21 are connected to either the mounting side drive gear 15 or the removal side drive gear 16. The slide plate 5 also comes to a separated state, and the slide plate 5 stops at the inner end of the tape player.

(At the start of cassette attachment/detachment...Fig. 7) When an ejector switch (not shown) provided on the escutcheon of the tape player is pressed, the plunger 29 is actuated by the pulse current from the ejector switch, and the rotating lever interlocked with this plunger 29 is activated. 28 rotates. Then, the pin 34 at the tip of the rotary lever 28 comes off the neutral part 31 of the cam 33, and the switching plate 21, which had been locked by the pin 34, is moved from the reversing spring 2.
It rotates clockwise in the figure by the force of 4. As a result, the attachment/detachment side switching gear 23 on the switching plate 21
Detachable side drive gear 16 that is always linked to the motor
The driving force of the motor is applied to the detachable drive gear 1.
6. It is transmitted to the gear 17 via the attachment/detachment side switching gear 23, the transmission gear 20, and the reduction gear group 18, and causes the gear 17 to rotate in the opposite direction to that at the time of attachment.

(During the cassette installation/detachment...Fig. 8) When the gear 17 rotates in the opposite direction, the slide plate 5, which is engaged with it through the rack 14, moves toward the front side of the tape player. Accordingly, the guide arm 2 is first raised by the elevating cam 6 of the slide plate 5, contrary to when it is installed, and the pack guide 1 supported by the guide arm 2 is lifted from the cassette playing position together with the cassette inside. Next, the swing lever 10 is rotated by the loading/unloading cam 13 of the guide arm 2, and as the tip of the swing lever 10 moves the pack stopper 9 toward the front side, it is pressed by the stopper piece 9b of the pack stopper 9, and the pack guide The cassette in 1 is pulled out to the front side of the tape player.

In this case, as the slide plate 5 moves toward the front side, the pin 27 provided on the slide plate 5 rotates the reversing plate 25 clockwise, and one arm of the reversing plate 25 returns to the base end of the switching plate 21. It will be located outside the switching plate 21 by climbing over the section. At the same time, the reversing spring 24 provided between one arm of the reversing plate 25 and the base end of the switching plate 21 is also reversed, thereby pressing the base end of the switching plate 21 clockwise.

However, in this state, the pin 34 of the rotating lever 28 is engaged with the detachable part 32 of the cam 33, so the switching plate 21 does not move, and the switching gear 23 on the switching plate 21 and the detaching side drive The meshing with the gear 16 is maintained.

(When attaching and detaching the cassette is completed...Fig. 3) When the slide plate 5 reaches the front side of the tape player and comes into contact with the switch SW4 provided on the front side of the side plate 4, the plunger 29 is excited by the command from the switch SW4. Then, the rotation lever 28 rotates. Then, the rotation lever 28
Since the pin 34 is removed from the detachable part 32 and engaged in the neutral part 31 by the action of the protrusion 35 and the spring 36, the switching plate 21, which is pressed by the reversing spring 24, also moves to the detachable side switching gear 23. rotates clockwise to a position away from the attachment/detachment drive gear 16 and stops at a neutral point.

In the following, by repeating the operations shown in FIGS. 3 to 8, the operation of loading and unloading the cassette into and from the tape player is automatically performed using the driving force of the motor.

C. Effects of the Embodiment As described above, according to the present embodiment, the cassette can be loaded and unloaded using the driving force of the motor and without reversing the rotational direction of the motor.

In particular, in this embodiment, since the cam 33 provided on the switching plate 21 has a neutral portion 31, it is possible to stop the switching plate 21 at the neutral position, and the cam 33 provided on the switching plate 21 can be stopped at the neutral position. A clutch function can be provided in between. Therefore, there is no overrun due to the inertia of the motor, which is different from the case where the cassette is loaded and unloaded by constantly meshing the motor and the gear mechanism, and there is an advantage that the switching operation at the time of loading and unloading can be carried out reliably.

Furthermore, since the switching plate itself is provided with a cam having a neutral portion, compared to a device in which a clutch mechanism is provided separately from the switching mechanism for mounting and dismounting, members dedicated to the clutch mechanism (such as gears, etc.) (plunger) is not required, and the device can be made more compact by reducing the number of parts.

(6) Other embodiments The present invention is not limited to the illustrated embodiments, and the following embodiments are also possible.

First, in the illustrated embodiment, one reversing spring is used as a means for pressing the switching plate 21 toward both the attachment side and the detachment side, but instead, two plungers that perform suction operations in opposite directions are used. Alternatively, the switching plate can be pushed in the opposite direction by a single plunger and spring combination.

Also, the pin 3 that engages with the cam 33 of the switching plate 21
4 may be provided directly on the plunger 29 without providing it on the rotating lever 28.

Also, instead of pulling in the cassette in the pack guide 1 using the swing lever 10 as in the illustrated embodiment, the slide plate 5 and the cassette are directly engaged, and the slide plate 5 allows the loading and unloading of the cassette to be directly performed. You can also make them do it.

Furthermore, in the case of a tape player, in which the cassette is drawn horizontally into the pack guide 1 and the tape player's reel shaft and pack guide pin insertion into the cassette is performed by raising each mechanism on the tape player side, the sliding plate 5 is used. There is no need to raise and lower the guide arm 2, and the guide arm 2 itself is also unnecessary.

Also, instead of using the lever SW1 provided at the back of the pack guide 1 as a means for detecting a cassette inserted into the pack guide 1, after manually inserting the cassette into the pack guide 1, the tape player's escutcheon The plunger 29 can also be energized by an ejection switch provided at the.

Furthermore, the number of drive gears and switching gears is not two each as shown in the figure, but two for one drive gear.
Two switching gears may be meshed alternately, or one idler type switching gear may be meshed with two drive gears rotating in opposite directions.

(7) Effects of the Invention As described above, according to the present invention, it is possible to load and unload the cassette without reversing the motor using the switching mechanism, so there is no generation of reverse generation current due to motor inertia, and the motor and This has the advantage that there is no risk of failure of the changeover switch. In particular, since the switching mechanism itself is provided with a neutral portion and has a clutch function, the overall structure of the device can be simplified and miniaturized.

[Brief explanation of drawings]

The drawings show an embodiment of the cassette loading/unloading device according to the present invention, and FIG. 1 is a plan view of the loading/unloading mechanism thereof, FIG. 2 is a side view of FIG. 1, and FIGS.
The figure is a plan view showing each mode of the drive and switching mechanism in this embodiment. T...tape player, C...cassette, SW2,
SW4...Switch, 1...Pack guide, 2...Guide arm, 3...Spindle, 4...Side plate, 5...Slide plate, 6...Elevating cam, 7...Guide pin, 8...Guide hole, 9...Pack stopper, 10...Swing Lever, 11... Pin, 12... Guide roller, 13... Mounting/detaching cam, 14... Rack, 15... Mounting side drive gear,
16... Detachable drive gear, 17... Gear, 18... Reduction gear group, 19... Board, 20... Transmission gear, 21... Switching plate, 22... Mounting side switching gear, 23... Detaching side switching gear, 24... Reversing spring, 25... Reversing plate, 26... Slit, 27... Pin, 28... Rotating lever, 29... Plunger, 30... Mounting part, 31...
Neutral part, 32... Detachable part, 33... Cam, 34... Pin, 35... Projection, 36... Spring.

Claims (1)

[Claims] 1. A slide plate that moves from the front side to the rear side of the tape player is provided, and this slide plate is provided with a pack guide section for a cassette inserted into the tape player, and Accordingly, in a device for loading and unloading a cassette by moving the cassette between an insertion position and a playing position, a motor that rotates in a fixed direction is provided as a drive source for a slide plate, and a motor is provided between the motor and the slide plate. is provided with a drive mechanism section that transmits the rotational force of the motor to the slide plate, and this drive mechanism section is provided with a switching mechanism for reversing the rotational direction of the motor that is transmitted to the slide plate, and in this switching mechanism, A switching plate that moves between the attachment side and the detachment side is rotatably arranged in the vicinity of a drive gear that interlocks with the motor, and this switching plate has a switching plate that meshes with the drive gear as the switching plate moves. A pressing means is provided to support the gear and to press the switching plate to the mounting side and the detaching side.Furthermore, the switching plate is provided with a cam having recesses in three locations: a mounting portion, a neutral portion, and a removal portion. A cassette loading/unloading device characterized in that a pin that engages with the cam is interlocked with a plunger, and the plunger is operated according to the position of a slide plate that interlocks with the pack guide. 2. The drive gear and the switching gear are interlocked with the motor rotating in a fixed direction and alternately mesh with the mounting side drive gear and the demounting side drive gear, which rotate in opposite directions, and the mounting side drive gear or the demounting side drive gear. The cassette according to claim 1, comprising a mounting side switching gear and a removing side switching gear, and the mounting side switching gear and the removing side switching gear are always meshed with a gear on the sliding plate side of the drive mechanism section. loading/unloading device.