JPH0562310A - Power ejecting mechanism - Google Patents

Abstract

PURPOSE:To simplify a constitution without using a complicated circuit and also to secure a superior operability by performing an exact ON/OFF operation of a main power source, in a power ejection mechanism performing the ON/OFF operation of main power source in accordance with the inserting and ejecting operations of a cassette pack. CONSTITUTION:1st and 2nd switches A, B are those to control the ON/OFF state or a driving motor 34. A guide prate 11 is the member operating the 1st switch A to be the ON state at the pack inserting operation and to be the OFF state at the ejecting operation. On the other hand, a crutch plate 6 is the member operating the 2nd switch B to be the ON state earlier than the time the guide plate 11 makes the switch A to the OFF state at the ejecting operation, then the switch B is made to the OFF state at the time when the ejecting operation is finished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes a driving force of a drive motor which is provided in a cassette tape player for turning on / off a main power supply in accordance with an inserting operation and a discharging operation of a cassette pack and which is operated by the main power supply. The present invention relates to a power eject mechanism for performing only a cassette pack ejecting operation, and more particularly to a power eject mechanism for improving control of an on / off state of a main power supply during a cassette pack ejecting operation.

[0002]

2. Description of the Related Art Generally, there are two technical demands for a cassette tape player, that is, improvement in operability and miniaturization.
As a mechanism that satisfies these two demands at the same time,
A power eject mechanism is known. The power eject mechanism is composed of a drive motor that is operated by the main power source of the player, and an eject plate that moves so as to perform a cassette pack ejection operation (hereinafter referred to as an eject operation) by receiving a driving force from the drive motor. It is a mechanism that is done.

Usually, the cassette pack is used for the cassette tape player in the ejecting operation and the inserting operation (hereinafter,
This is called a pack-in operation). That is, the cassette pack is inserted into the player by the pack-in operation, fixed at the reproducing position of the cassette tape, and ejected from the reproducing position to the outside of the player by the eject operation according to the eject operation. By the way, since the cassette pack is fixed to the reproducing position with a constant holding force, the ejecting operation for separating the cassette pack from the reproducing position has a larger load than the pack-in operation among the above two operations. The power eject mechanism has a high operability because it performs an eject operation with a large load by an electric driving force. Moreover, since the electric driving force is used only for the ejection operation, the driving force transmission system can be easily simplified and the player can be downsized.

Further, as a means for improving the operability, it has been proposed that the above power ejecting mechanism be provided for a cassette tape player that performs on / off operation of the main power supply in accordance with the pack-in operation and the eject operation. ..

The on / off operation of the main power source of such a player will be described. When performing the pack-in operation, first, the cassette pack is pushed into the player through the insertion opening formed in the player. When the cassette pack moves to above the reproduction position, a predetermined switch is operated by the cassette pack or a member that moves together with the cassette pack, and the main power supply turns on. Then, it descends from above the reproduction position to the reproduction position, at which point the pack-in operation is completed. On the contrary, when performing the eject operation, the cassette pack is first lifted from the reproduction position. At this time, a predetermined switch is operated so that the main power supply is turned off by the cassette pack or a member moving together with the cassette pack.
When the main power is turned off, the drive motor that supplies the drive force to the eject plate also stops. Therefore, a control circuit such as a microcomputer and a backup power supply are provided in order to delay the timing at which the drive motor enters the OFF operation. The control circuit and the backup power supply allow the eject plate to continue to move and the cassette pack to perform the eject operation without stopping the operation of the drive motor even when a predetermined switch is operated to turn off the main power. Then, when the cassette pack is completely ejected from the insertion slot, the operation of the drive motor is stopped, and the eject operation is completed. According to such a player, since the main power source is in the off state at the time when the eject operation is completed, it is not only excellent in operability, but also excellent in an in-vehicle audio device or the like which needs to save power consumption. It is possible to exert the effect.

[0006]

However, the above power eject mechanism has the following problems.
That is, in order to completely eject the cassette pack from the player, a control circuit and a backup power supply that delay the timing at which the drive motor enters the off state are indispensable. Therefore, even if an attempt is made to simplify the mechanism by performing only the ejecting operation by the electric driving force, the circuit becomes complicated, resulting in an increase in the size of the player.

The present invention has been proposed in order to solve the problems of the prior art as described above, and an object of the present invention is to simplify the configuration without using a complicated circuit and to achieve an appropriate accuracy. A main object of the present invention is to provide a power eject mechanism for performing on / off operation of a main power source and ensuring excellent operability.

[0008]

In order to solve the above-mentioned problems, the power eject mechanism of the present invention is provided in a cassette tape player which turns on / off the main power supply in accordance with the pack-in operation and the eject operation of the cassette pack. A drive motor that is operated by the main power source, and an eject plate that moves so as to perform an eject operation of the cassette pack by using the drive force of the drive motor,
A first switch for controlling the on / off state of the drive motor, a second switch for controlling the on / off state of the drive motor, and a reciprocating movement associated with the pack-in and eject operations of the cassette pack so as to operate the first switch. A first plate that moves and a second motor that receives the driving force of a drive motor to operate the second switch and reciprocates at an earlier time than the first plate that moves with the eject operation and at the end of the eject operation. And two plates.

[0009]

The operation of the present invention having the above construction is as follows. That is, when the cassette pack is ejected from the cassette tape player, both the first and second switches are off, the main power supply is off, and the drive motor is stopped. When the cassette pack performs the pack-in operation for the cassette tape player in such a state, first the first plate moves. The moved first plate operates the first switch,
Turn on the switch. As a result, the main power supply is turned on, and the cassette tape player enters the play state when the pack-in operation is completed.

On the other hand, when the cassette pack is ejected, the eject plate moves under the driving force of the drive motor, and the cassette pack performs the eject operation.
At a time earlier than the first plate that moves with the eject operation, the second plate moves by receiving the driving force of the drive motor and the second switch is operated to turn on the second switch. To do. After the second switch is turned on, the first plate moves so as to return to the original position as the cassette pack is ejected. The first plate performing this movement again operates the first switch, and the first switch is turned off. However, since the second switch is in the on state before the first switch is in the off state, the main power supply does not perform the off operation, and the operation of the drive motor is continued by the main power supply.

Further, the ejecting operation of the cassette pack advances, and at the end of the ejecting operation, the second plate moves so as to return to the original position. The second plate performing this movement again operates the first switch, and the second switch is turned off. As a result, the ejecting operation of the cassette pack is completed, and in this state, both the first and second switches are turned off. That is, the main power supply turns off,
The drive motor also stops.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the power ejecting mechanism of the present invention described above will be specifically described with reference to FIGS. The power eject mechanism of this embodiment is provided in the cassette tape player and is a mechanism for performing only the ejecting operation of the cassette pack by the electric driving force. 1 to 3 are plan views of the present embodiment. Of these, FIG. 1 shows a cassette pack ejected, FIG. 2 shows a cassette pack inserted, and FIG. 3 shows a cassette pack eject operation. Shows the state in the middle of taking. FIG. 4 is a graph showing a timing chart showing the on / off states of the first and second switches and the drive motor in this embodiment.

In addition, in FIGS. 1 to 3, each member is arranged on a chassis and linearly reciprocates from the front side (lower side in the figure) to the back side (upper side in the figure) when viewed from the user side of the player. The moving object can be moved back and forth, and moving to the front side (lower side in the figure) is set back, and moving to the rear side (upper side in the figure) is set to forward. Further, the front end of the member that reciprocates in the front-rear direction is the base end, and the back end is the front end.

First, a member group that constitutes a main part of this embodiment will be described. The main part of this embodiment is the guide plate 11
(First plate), clutch plate 6 (second plate), eject plate 7, springs 19, 27, 8 installed on the respective plates, first switch A, second plate It is composed of a switch B and a drive motor 34.

The clutch plate 6 is located on the left side in the figure, and is a vertically long rod-shaped member that is arranged so as to be movable back and forth, and its base end portion can come into contact with the front end portion of the initial drive means 4 which will be described later. Is becoming Further, one end of the clutch spring 8 is provided near the tip of the clutch plate 6, and the eject plate 7 is engaged with the other end of the clutch spring 8. That is, the clutch plate 6 and the eject plate 7 are connected by the clutch spring 8.

The eject plate 7 is installed in parallel with the clutch plate 6 so as to be movable back and forth, and has a contact portion 7a extending laterally at the base end portion. This contact part 7
An eject plate spring 27 is installed at the center of a, and is biased toward the base end side by this spring 27. It should be noted that the elastic force of the eject plate spring 27 is generated by the clutch plate 6 via the clutch spring 8.
Is also transmitted. Therefore, the clutch plate 6 is also biased toward the base end side.

A guide plate 11 is provided adjacent to the right side of the eject plate 7 in the figure so as to be movable back and forth. The guide plate 11 is installed in parallel with the eject plate 7 and the clutch plate 6 so as to be movable back and forth, and has a laterally extending abutting portion 11a formed at the base end thereof. The contact portion 11a can contact the contact portion 7a of the eject plate 7 from the base end side.

The contact portion 11a of the guide plate 11
A guide plate spring 19 is installed in the guide plate 11, and the spring 19 urges the guide plate 11 toward the front side. Further, a guide hole 11b having a step portion is opened in the central side surface of the guide plate 11. The guide hole 11b is shaped such that the tip end side is high and the base end side is low. Further, a protruding piece 14a formed at a side edge portion of a guide arm 14 described later is inserted into the guide hole 11b. Further, a locking claw 11c protruding rightward in the drawing is formed on the proximal end side of the guide hole 11b.

At the tips of the guide plate 11 and the clutch plate 6, a first motor for controlling the rotation of the drive motor 34 is provided.
Also, the second switches A and B are arranged so that they can be pressed by the tip portions of the moving guide plate 11 and clutch plate 6. The guide plate 11 and the clutch plate 6 during the eject operation
Although both move, the clutch plate 6 operates the second switch earlier than the guide plate 11. Also, both switches A and B have the same shape,
The same applies to the operation of always being biased to the front side and being depressed by the pressing operation. However, the positions of the switches A and B in the off state and the on state are opposite to each other. That is, the first switch A is turned off by being pressed,
When the pressure is released, it is turned on. On the other hand, the second switch B is turned on by being pressed, and is turned off by releasing the pressing.

The drive motor 34 is operated by the main power source of the cassette tape player of the present embodiment, and transmits the drive force to the clutch plate 6 via the transmission gear 5, the eject gear 2 and the drive link 4 which will be described later. It is like this.

Next, each structure of the member group for moving the guide plate 11 or the eject plate 7 will be described.
A lock plate 18 is arranged adjacent to the guide plate 11. The lock plate 18 is composed of a laterally long side portion and a hook-shaped portion protruding leftward in the drawing, and is rotatably provided around a support shaft 18a provided at a substantially central portion. The lock plate 18 is always urged in the clockwise direction in the figure by an elastic member (not shown), and is rotated in the counterclockwise direction in the figure by the pressing force of the cassette pack p performing the pack-in operation. Further, a contact portion 18b is formed on the hook-shaped portion of the lock plate 18. As long as the lock plate 18 is not pressed by the cassette pack p, the contact portion 18b is in contact with the locking claw 11c of the guide plate 11, and the contact portion 18b and the locking claw 11c are in contact with each other, so that the guide plate 11 moves. The backward movement is restricted.

A guide arm 14 for holding the cassette pack p is arranged on the base end side of the lock plate 18 so as to be movable up and down. The lowering operation completion position of the guide arm 14 is the reproducing position of the cassette pack, and the raising operation completion position is a position substantially horizontal to the insertion port of the cassette pack p (not shown). A protruding piece 14a is formed on the side edge of the guide arm 14. The protruding piece 14a is inserted into the guide hole 11b of the guide plate 11 and regulates the vertical movement of the guide arm 14. Further, a substantially elliptical swing arm 10 is rotatably installed on the left side of the upper surface of the guide arm 14 in the figure. One end of a rod-shaped rod spring 9 is fixed to approximately the center of the swing arm 10. The other end of the rod spring 9 is fixed on the contact portion 7a of the eject plate 7. Further, a vertically elongated opening (not shown) is formed on the upper surface of the guide arm 14, and a T-shaped pack stopper 17 is slidably fitted in the opening in the front-rear direction. Further, the slot-in spring 16 is provided at the center of the free end of the swing arm 10 and the lateral side of the pack stopper 17.
Is installed at each end. The slot-in spring 16 exerts an elastic force that urges the pack stopper 17 located on the back side to the back side and the pack stopper 17 located on the front side to the front side with a predetermined boundary point as a boundary.

Finally, each structure of a member group for moving the clutch plate 6 will be described. An eject lever 1 is arranged on the right side in the figure so as to be movable back and forth. An eject knob 1c is formed at the base end of the eject lever 1. Further, a taper portion 1b that is inclined toward the tip end portion is formed near the tip end portion of the eject lever 1. A lever spring 1a is installed on the base end side of the taper portion 1b, and the eject lever 1 is always biased toward the base end side by the elastic force of the lever spring 1a.

Further, a substantially U-shaped first transmission member 31 is disposed adjacent to the eject lever 1. In addition,
The tip portion of the substantially U-shaped side portion has a triangular shape. A spindle 31c is provided at the tip of the first transmission member 31.
Is installed. In addition, a spring 31 is formed near the center of the U-shaped side of the eject lever 1 and is perpendicular to the side.
a is installed. The first transmission member 31 is rotatable about a support shaft 31c and is biased in the counterclockwise direction in the figure by the elastic force of the spring 31a. Further, an abutment pin 31d with which the tapered portion 1b of the eject lever 1 abuts is provided at the inner apex of the triangular portion at the tip of the first transmission member 31. On the other hand, the first
The base end portion of the transmission member 31 is a pressing portion 31b.

A laterally long second transmission member 32 is arranged so as to be orthogonal to the longitudinal direction of the first transmission member 31 and contact the pressing portion 31b. The second transmission member 32 is provided so as to be reciprocally movable in the left-right direction. The second transmission member 32 is urged by an elastic member (not shown) so as to return to the initial state.

Further, a vertically elongated third transmission member 33 is arranged so as to abut the left end portion of the second transmission member 32 in the figure. The third transmission member 33 is arranged orthogonal to the second transmission member 32, and the support shaft 33b is inserted through the central portion. A spring 33a is provided on the base end side of the third transmission member 33.
Is installed. The third transmission member 33 is rotatable about the support shaft 33b and is biased in the counterclockwise direction in the drawing by the elastic force of the spring 33a. Further, a locking portion 33c is provided at the tip of the third transmission member 33.

The eject gear 2 is rotatably disposed near the engaging portion 33c of the third transmission member 33. A transmission gear 5a meshes with the eject gear 2. This transmission gear 5a meshes with the transmission gear 5b, and the transmission gear 5b
Engages with a drive gear 34a that rotates by the drive force of the drive motor 34. The rotation of the eject gear 2 is normally restricted by the locking portion 33c, and the third transmission member 33
Rotates in the clockwise direction in the figure and the restriction by the locking portion 33c is released, the transmission gears 5a, 5b and the drive gear 34a.
The rotary drive force from the drive motor 34 is received via the. A cam plate 20 having an irregular shape is fixed on the eject gear 2. The outer shape of the cam plate 20 has a bottom portion having a short distance from the rotation center of the eject gear 20 and a long top portion.

On the front side of the eject gear 2, a substantially V-shaped drive link 4 is arranged. The drive link 4 is provided with a support shaft 4c in a bent portion, and is rotatable about the support shaft 4c. Further, an abutting portion 4a that abuts the outer periphery of the cam plate 20 is formed at the tip of the drive link 4. An eject spring 3 is installed at the base end of the drive link 4. The elastic force of the eject spring 3 urges the contact spring 4 in the counterclockwise direction in the figure so that the contact portion 4a always contacts the cam plate 20. Further, the clutch plate 6 is arranged at the front end of the drive link 4. A portion of the drive link 4 that is close to the clutch plate 6 is a pressing portion 4b.

Next, the pack-in operation and the eject operation of the cassette pack p of this embodiment will be described.

[Ejecting state] ... FIG. 1 The pack stopper 17 is in the frontward retracted position, the contact portion 18b of the lock plate 18 contacts the locking claw 11c of the guide plate 11, and the guide plate 11 is in the forward position. It is locked. At this time, the first switch A is turned off while being pressed by the guide plate 11.

On the other hand, the contact portion 4a of the drive link 4 is in contact with the bottom portion of the cam plate 20, and the pressing portion 4b is separated from the clutch plate 6. Therefore, the clutch plate 6 is also separated from the second switch B, and the second switch B is in the off state when it is not pressed (state [I] in FIG. 4).

[Pack-in operation] ... FIG. 2 When the cassette pack p is inserted into the cassette tape player in such a state, the back side edge of the cassette pack p pushes the pack stopper 17. The pack stopper 17 advances a vertically long opening (not shown) on the upper surface of the guide arm 14. At this time, the slot-in spring 16 installed in the pack stopper 17 flexes, and an elastic force acts in the direction of ejecting the cassette pack p, that is, the direction of pushing the cassette pack p to the front side at the beginning of the operation, but a predetermined force is applied. When exceeding the boundary point, an elastic force acts in a direction to suck the pack stopper 17 inward.

When the rear side edge of the cassette pack p pushes the lock plate 18 toward the rear side, the lock plate 1
8 rotates counterclockwise in the figure, and the contact portion 18b separates from the locking claw 11c. Therefore, the guide plate 11 is retracted by the elastic force of the guide plate spring 19. As the guide plate 11 retracts, the protruding piece 14a inserted into the guide hole 11b of the guide plate 11 descends along the shape of the guide hole 11b. Therefore, the guide arm 14 descends and fixes the cassette pack p at the reproduction position. At the same time, the first switch A is operated by the backward movement of the guide plate 11 to be turned on (state [II] in FIG. 4). Therefore, the main power supply is turned on and the cassette tape player is in operation.

The abutting portion 11a of the retracted guide plate 11 is extremely close to the abutting portion 7a of the eject plate 7. On the other hand, the tip of the guide plate 11 is located rearward of that of the clutch plate 6.

[Eject Operation] ... FIG. 3 When the eject knob 1c of the eject lever 1 is pressed, the eject operation of the cassette pack p starts.
By pressing the eject knob 1c, the eject lever 1 advances, and the first transmission member 31 moves on the tapered portion 1b.
The contact pin 31d of moves. Therefore, the first transmission member 31 rotates about the support shaft 31c in the clockwise direction in the drawing. Therefore, the pressing portion 31b pushes the second transmission member 32 leftward in the drawing, and the second transmission member 32 pushes the third transmission member 33 leftward in the drawing. The third transmission member 33 rotates in the clockwise direction in the figure around the support shaft 33b, and the locking portion 33c releases the regulation of the eject gear 2.

As a result, the driving force of the drive motor 34 is transmitted to the eject gear 2 via the drive gear 34a and the transmission gears 5a and 5b, and the eject gear 2 rotates counterclockwise in the figure. Therefore, the cam plate 20 on the eject gear 2 also rotates in the same direction. When the contact portion 4a approaches the top of the cam plate 20, the drive link 4 rotates in the clockwise direction in the figure around the support shaft 4c, and the pressing portion 4b presses the base end portion of the clutch plate 6. In this way, when the clutch plate 6, which is the second plate, receives the driving force of the drive motor 34 and moves forward, the second switch B is pressed, and the second switch B is turned on.

By the way, the eject plate 7 connected to the clutch plate 6 by the clutch spring 8.
Will also move forward. Since the contact portion 7a of the eject plate 7 and the contact portion 11a of the guide plate 11 are extremely close to each other, the contact portion 11a is moved forward and the contact portion 11a is moved forward.
Is pressed, and the guide plate 11 moves forward. But,
As described above, at the end of the pack-in operation, the front end of the guide plate 11 is located rearward of that of the clutch plate 6. That is, the clutch plate 6 which is the second plate is the guide plate 1 which is the first plate.
The second switch B is operated earlier than 1. Therefore, when the second switch B is pressed, the guide plate 11 is not pressing the first switch A, and the first switch A continues to be in the ON state ([in FIG. 4]. III]).

The guide plate 11 further advances, the first switch A is pressed again, and the first switch A is turned off. Even if the first switch A is turned off,
As long as the contact portion 4a is in contact with the vicinity of the apex of the cam plate 20, the pressing portion 4b of the drive link 4 continues to press the base end portion of the clutch plate 6, and the second switch B continues to be in the ON state ( The state of [IV] in FIG. 4). Therefore, the main power supply does not perform the OFF operation, and the operation of the drive motor 34 also continues.

Further, by advancing the guide plate 11,
The protruding piece 14a inserted into the guide hole 11b of the guide plate 11 rises along the shape of the guide hole 11b. Therefore, the guide arm 14 rises and lifts the cassette pack p to a position substantially horizontal to the insertion port of the cassette pack p (not shown).

As the eject plate 7 advances, the rod spring 9 fixed to the contact portion 7a also moves to the back side. Therefore, the swing arm 10 to which the other end of the rod spring 9 is fixed rotates in the counterclockwise direction in the figure. Therefore, the end of the slot-in spring 16 installed on the free end side of the swing arm 10 approaches the other end, that is, the end installed on the pack stopper 17 side, while wrapping around from the back side. As a result, the slot-in spring 16 exerts an elastic force that urges the pack stopper 17 to the front side. The pack stopper 17 retracts a vertically long opening (not shown) on the upper surface of the guide arm 14, and the cassette pack p also retracts. Since the back side edge of the cassette pack p is separated from the lock plate 18,
The lock plate 18 rotates clockwise in the drawing by an elastic member (not shown), and returns to the initial state.

When the eject gear 2 and the cam plate 20 rotate, and the contact portion 4a of the drive link 4 approaches the bottom portion of the cam plate 20 again, the drive link 4 rotates in the counterclockwise direction about the support shaft 4c. Then, the pressing portion 4b is separated from the base end portion of the clutch plate 6. Since the clutch plate 6 is constantly urged toward the base end by the elastic force of the eject plate spring 27, the clutch plate 6 retreats and returns to the initial state. Therefore, the clutch plate 6 is separated from the second switch B, and the second switch B is turned off.

By the way, the eject knob 1c of the eject lever 1 only needs to be pressed once, and the pressing force by the operation is released when the eject operation is started. Therefore, the eject lever 1 uses the lever spring 1a to move the first, second and third transmission members 31, 3 respectively.
2 and 33 are respective springs 31a and 33a (second
The elastic member of the transmission member 32 is returned to the initial state by (not shown). Therefore, the rotation of the eject gear 2 is again restricted by the locking portion 33c. Therefore, the off state of the second switch B is kept.

Further, as the clutch plate 6 moves backward, the eject plate 7 also moves backward. At this time, the contact portion 7a is separated from the contact portion 11a, and the guide plate 11 is retracted by the elastic force of the guide plate spring 19.
The abutting portion 18b of the lock plate 18, which has returned to the initial state, comes into contact with the locking claw 11c of the guide plate 11 that is in the backward movement, whereby the guide plate 11 is locked at the forward position. Therefore, the OFF state of the first switch A is also kept.

As described above, since the first and second switches A and B are both turned off, the main power supply and the drive motor 34 perform an off operation and stop (state [V] in FIG. 4). At this point, the cassette pack p has been completely ejected outside the player, and the ejection operation is completed.

According to the embodiment described above, it is possible to terminate the ejecting operation of the cassette pack p and simultaneously turn off the main power source without providing a complicated control circuit or backup power source. It is possible to simultaneously satisfy the two technical demands of improving the performance and downsizing the mechanism.

The power eject mechanism of the present invention is
The present invention is not limited to the above embodiment, but the shape, dimensions, etc. of each member can be changed as appropriate. For example, as shown in FIG. 5, the clutch plate 60 has a base end portion similar to that of the drive link 4. You may provide the link part 40 which functions.
The link portion 40 has a substantially triangular shape, and an abutting portion 40a that abuts on the bottom portion of the cam plate 20 is provided at the inner apex portion. The clutch plate 60 is made of a flexible material such as resin so that the contact portion 40a reliably contacts the apex of the cam plate 20.

According to this embodiment, since the clutch plate 60 is directly contacted with the cam plate 20 through the link portion 40, the stroke accuracy of the eject plate in forward and backward movement is high, and the drive motor is high. Loss of driving force from 34 is small. Moreover, the stroke of the clutch plate 60 in the front-rear movement can be shortened, and the diameter dimension of the eject gear 2 can be increased correspondingly, and a large driving force can be secured. Therefore, the present invention can be applied to a cassette tape player that requires a large driving force for eject operation, such as the absence of a key-off head release mechanism. Further, since the driving force in the eject operation is large, it is easy to change the reduction ratio and shorten the eject time. Moreover, the number of members is reduced, which leads to a reduction in production cost.

[0048]

As described above, according to the present invention, the first and second switches for controlling the on / off state of the drive motor and the reciprocating motion of the cassette pack as it is inserted and ejected. A first plate for operating the first switch, and a second plate for operating the second switch by reciprocating at the start and end of the eject operation by receiving the driving force of the drive motor. With such a simple configuration, the main power supply can be turned off at the same time as the cassette pack ejecting operation by the electric driving force is completed without providing a complicated control circuit and backup power supply, so that operability is improved and the mechanism is improved. Can be miniaturized.

[Brief description of drawings]

FIG. 1 is a plan view (ejection state) of an embodiment of a power eject mechanism of the present invention.

FIG. 2 is a plan view of the present embodiment (packed-in state).

FIG. 3 is a plan view of the present embodiment (a state in which an eject operation is being performed).

FIG. 4 is a graph showing a timing chart showing on / off states of the first and second switches and the drive motor in the present embodiment.

FIG. 5 is a plan view (packed-in state) showing another embodiment of the power eject mechanism of the present invention.

[Explanation of symbols]

 1 Eject Knob 2 Eject Gear 4 Drive Link 40 Link 5a, 5b Transmission Gear 6,60 Clutch Plate 7 Eject Plate 8 Clutch Spring 9 Rod Spring 10 Swing Arm 11 Guide Arm 15 Pack Guide 16 Slot-in Spring 17 Pack Stopper 18 Lock Arm 19 First spring 34 Drive motor

Claims (1)

[Claims] 1. A drive motor, which is provided in a cassette tape player for turning on and off a main power supply in accordance with an inserting operation and a discharging operation of a cassette pack, and which uses a drive motor operated by the main power supply and a driving force of the drive motor. In a power eject mechanism including an eject plate that moves to perform a cassette pack ejection operation, a first switch that controls an on / off state of the drive motor, and a second switch that controls an on / off state of the drive motor. A first plate that reciprocates in accordance with an inserting operation and an ejecting operation of the cassette pack so as to operate the first switch; and a driving force of the drive motor so as to operate the second switch. The 1st which receives and moves with eject operation
Second plate that reciprocates earlier than the plate and when the cassette pack discharge operation ends, and a power eject mechanism.