JPH0648633Y2 - Door device of recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a door device, and more particularly to a door device of a recording / reproducing device that moves between a loading / unloading position and a playing position by two operations of horizontal movement and vertical movement. Regarding

[Conventional technology]

Generally, in a recording / reproducing apparatus such as a cassette deck, a door type door apparatus for mounting a recording medium such as a cassette half and then moving it to a playing position is a tray type having two operations of horizontal movement and vertical movement. ing.

4 and 5 show a conventional tray type door device, in which reference numeral 21 is a door for covering the opening of the front decorative plate 22, and 23.
Indicates a tray on which a recording medium is placed and moves between a loading / unloading position and a playing position. The tray 23 horizontally moves to and from the recording / reproducing apparatus, and vertically moves in the apparatus to move on a reel stand. , Drive mechanism part such as capstan shaft (not shown)
To engage with. The door 21 is pivotally attached by a pivot 24 so as to be openable and closable, and a spring means 25 for urging the door in the closing direction is provided at an end of the door on the pivot side. Then, the tray 23 that moves horizontally from the recording / reproducing device and comes out.
The front end portion 23a of the door comes into contact with the back surface 21a of the door 21 and pushes the door open, whereby the opening operation of the door 21 is performed.

On the contrary, the front decorative plate of the tray 23 which moves horizontally while pressing the door 21 with its lower surface 23b and enters the recording / reproducing apparatus.
When the protruding amount from 22 is within the size of the door 21, and the front end portion 23a of the tray comes into contact with the back surface 21a of the door,
The door 21 gradually rotates in the closing direction by the force of the spring means 25 as the tray 23 moves, and the closing operation of the door 21 is performed. Then, the upper end portion 21b of the door comes into contact with the stopper 26 integrally formed with the front decorative plate 22 to complete the closing operation,
The tray 23 that has entered the recording / reproducing apparatus apart from the back surface 21a of the door changes its movement from horizontal movement to vertical movement.

[Problems to be solved by the device]

However, in the door device described above, when the power is turned off with the tray 23 ejected from the recording / reproducing device, when the tray 23 is manually pushed into the device, the tray holding the door 21 in the opening direction is pressed. Spring means 25 because 23 is lost
There was a problem that the door 21 was closed by the force of and the hand for pushing the tray was caught in the door.

Further, since the contact position between the front end portion 23a of the tray and the back surface 21a of the door changes with the movement of the tray 23 and the point of action for pushing the door 21 moves, there is a problem that the opening / closing operation of the door is not smooth. There is also a problem that sliding noise and scratches occur between the tray and the door.

Therefore, the present invention solves the above-mentioned problems of the prior art, and when the power is turned off with the tray ejected from the recording / reproducing apparatus, the door is pushed regardless of the tray operation after the tray is pushed into the apparatus. It is an object of the present invention to provide a door device capable of closing a door.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a door device of a recording / reproducing apparatus for placing a recording medium on an upper surface of a tray and moving the recording medium between a loading / unloading position and a playing position. Of the door, which is pivotally attached to the front surface of the door, and a first gear which is provided on the pivot of the door and rotates with the opening and closing of the door, meshes with the first gear, and is installed in the recording / reproducing apparatus. A second gear that is pivotally supported, a swing arm that is provided coaxially with the second gear on a pivot shaft of the second gear, and a movement of the tray that engages with the swing arm. An elevating arm that vertically moves in an interlocking manner, the second gear and the swing arm are integrally connected to each other, and the turning force of the swing arm is set to the second.
When the swing arm is fixed and only the second gear rotates, the second gear is passed in a door closing direction opposite to the rotation direction of the swing arm at a certain point when the swing gear is fixed and the second gear rotates.
The first spring means for rotating the gear is and the second spring means provided on the swing arm and biasing the swing arm in the closing direction of the door.

[Action]

Since the second gear coaxial with the swing arm is integrally connected to the swing arm by the first spring means, when the swing arm rotates due to the engagement with the elevating arm, the second gear also rotates. The door is opened and closed by the rotating force of the first gear that moves and meshes with the second gear.

When the door is open and the power is off, the rocking arm that engages with the lifting arm is fixed. Therefore, when the door is closed in this state, the rocking arm and the second gear are released. Therefore, only the second gear rotates. And the second
When the first spring means connecting the swing arm and the second gear rotates with the rotation of the gear of the second gear, and the dead point is exceeded at a certain point, the second gear rotates in the closing direction of the door. Be energized.

〔Example〕

An embodiment of a door device of a recording / reproducing apparatus according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 indicates a door that covers an opening 3 of a front decorative plate 2 on the front surface of the recording / reproducing apparatus. It comes in contact with the stopper 5 formed on the. A tray (not shown) on which the cassette half is placed moves in and out through the opening 3 to move between the loading / unloading position and the playing position, and horizontally moves into the recording / reproducing apparatus. Moves vertically in the device and moves to the reel stand,
It is adapted to engage with a drive mechanism portion (not shown) such as a capstan shaft. Reference numeral 6 in the figure denotes an elevating arm that moves up and down in the recording / reproducing apparatus in a vertical direction in conjunction with the moving tray.

The pivot 4 is provided with a first sector gear 7 that rotates together with the door 1 that opens and closes.
A second sector gear 8 that meshes with is pivotally mounted in the recording / reproducing apparatus via a pivot 9. A swing arm 10 is provided coaxially with the second sector gear 8 on the pivot 9, and a locking claw 11 that engages with the elevating arm 6 is provided at one end of the swing arm 10 so as to project therefrom. Has been done.

In addition, a pin 12 protruding from one side edge portion of the second sector gear 8 and a pin 13 protruding from the swing arm 10 at a substantially intermediate position between the pivot shaft 9 and the locking claw 11 are provided. A first coil spring 14 is stretched between them, and the inward spring force of the spring 14 causes the swing arm 10 to abut on a pin 15 projecting from the sector gear 8 to cause the swing arm 10 to move. And the sector gear 8 are integrally connected. Further, a second coil spring 18 is stretched between a pin 16 protruding from the other end of the swing arm 10 and the chassis 17, and a spring force inward of the spring 18 causes the second coil spring 18 to stretch. The swing arm 10 is biased to rotate counterclockwise. And
The coil spring 14 is used to swing the arm 10 and the sector gear 8
, The sector gear 8 is also urged to rotate counterclockwise by the spring force of the coil spring 18.

Next, the operation of the door device of the recording / reproducing apparatus configured as described above will be described.

FIG. 1 shows a state in which the door 1 is in the fully closed position, and the tray (not shown) is in a performance position where it engages with a drive mechanism portion such as a reel base and a capstan shaft in the recording / reproducing apparatus. When a predetermined operation is performed to remove the cassette half being played, the tray moves vertically by electric force to release the engagement with the drive mechanism, and then horizontally moves to the loading / unloading position. The opening operation of the door 1 is performed.

That is, as shown in FIG. 2, when the elevating arm 6 moves upward in conjunction with the tray, the elevating arm 6 and the swing arm 10 move.
The engaging claws 11 are engaged, and the swing arm 10 rotates clockwise against the force of the coil spring 18 as the elevating arm 6 rises. Then, when the swing arm 10 rotates, the sector gear 8 integrally connected through the coil spring 14
Also rotates clockwise. By the rotation of the sector gear 8, the sector gear 7 meshing with the sector gear 8 rotates counterclockwise, and the pivot 4 of the sector gear 7 rotates the door 1 counterclockwise to open the door. Is done. Then, the door 1 completes its rotation at the fully open position where it abuts on a stopper (not shown), and upon completion of this opening operation, the rotation of each sector gear 7, 8 also ends. At this time, the lifting arm 6
Has not yet been completed, and further attempts to rotate the swing arm 10 and the sector gear 8, but the sector gear 8 does not rotate due to the stop of the door 1 at the fully open position described above. After that, the tray is pulled out from the door 1 which is fully opened, and when the horizontal movement of the tray is completed, the lifting of the elevating arm 6 is also completed.

On the contrary, in order to play the recording / reproducing apparatus, when the cassette half is placed on the upper surface of the tray and a predetermined operation is performed, the tray moves horizontally to enter the apparatus, and then vertically moves to the drive mechanism section. The raising / lowering arm 6 is moved down to the engaged playing position and interlocked with the vertically moving tray. By the way, since a force to rotate the swing arm 10 counterclockwise by the coil spring 18 acts on the swing arm 10 that engages with the lift arm 6 via the locking claw 11, the lift arm 6 is lowered. At the same time, the swing arm 10 rotates counterclockwise. When the swing arm 10 rotates, the sector gear 8 integrally connected via the coil spring 14 also rotates counterclockwise, and the sector gear 7 meshing with the sector gear 8 rotates clockwise. Then, the rotation of the sector gear 7 is transmitted to the door 1 through the pivot 4 and the closing operation of the door 1 is performed. When the door 1 comes into contact with the stopper 5, the closing operation is completed, and the closing operation is shown in FIG. It will be in a state of being.

The above is the normal operation when the door device of the recording / reproducing apparatus according to the present invention is in the power-on state.However, when the power is off while the tray is still open, the operation of the tray after pushing the tray into the device Is able to close the door regardless. The operation in the power OFF state will be described below.

When the tray is ejected from the recording / reproducing apparatus and the power is off, the tray can be manually pushed into the apparatus, but the tray that has entered the apparatus does not move vertically. Therefore, the elevating arm 6 that moves in conjunction with the vertically moving tray is held in the raised position, and the rotation of the swing arm 10 and the sector gear 8 that engage with the elevating arm 6 in the counterclockwise direction is locked. . Therefore, the door 1 is held in the fully open position shown in FIG.

Therefore, when the door 1 is closed by hand after pushing the tray, only the sector gear 8 is integrated with the swing arm 10 due to the meshing with the sector gear 7 rotating with the door 1 as shown in FIG. The state is released and it rotates counterclockwise.
The rotation of the sector gear 8 causes a coil spring 14 stretched between the pin 13 of the swing arm 10 and the pin 12 of the sector gear 8 whose rotation is locked in a counterclockwise direction about the pin 13. It rotates and at some point when the door 1 approaches the fully closed position, the swing arm 10 and the pivot 9 of the sector gear 8 are crossed. Then, when the axis 9 is crossed, the coil spring 14
Is in a state of exceeding the dead point, and the sector gear 8 is biased counterclockwise by the inward spring force of the spring 14, and even if the hand pushing the door 1 is released by this spring force, the door 1 is stopped by the stopper 5 It will rotate to the fully closed position where it comes into contact with.

However, when the power is off, the door 1 can be closed regardless of the operation of the tray, and even if the tray is pushed in by hand, the door does not close together with the tray, so the hand that pushes in the tray is not caught in the door. Absent. Further, since the tray and the door do not come into contact with each other, sliding noise and scratches do not occur, and the opening / closing operation of the door becomes smooth. Further, the biasing force of the coil spring 14 exceeding the dead point can surely close the door 1.

[Effect of device]

As is apparent from the above description, the present invention integrally connects the swing arm and the second gear, transmits the turning force of the swing arm to the second gear, and fixes the swing arm to the first gear. Two
When only the gear of the tray rotates, the first spring means for urging the second gear to rotate in the closing direction of the door beyond the dead point at some point has the first spring means. The door can be closed regardless of the operation, and the door can be surely closed by the biasing force of the spring means.

[Brief description of drawings]

1 to 3 are side views showing an embodiment of a door device of a recording / reproducing apparatus according to the present invention. In particular, FIG. 1 shows a door closed state, FIG. 2 shows a door opened state, and FIG. 3 shows power off
Sometimes the door is closed by hand, FIGS. 4 and 5 are side views showing the door device of the conventional recording / reproducing apparatus, and particularly FIG. 4 is a view showing the door closed,
FIG. 5 is a diagram showing a state in which the door is opened. 1 ... Door, 4, 9 ... Axis, 6 ... Lifting arm, 7 ...
First gear, 8 ... Second gear, 10 ... Swing arm, 11
...... Locking claws, 14 ...... First spring means, 18 ...... Second spring means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yosuke Masuoka 4-2610 Hanazono, Tokorozawa, Saitama Pioneer Co., Ltd. Tokorozawa Plant (72) Yutaka Hasegawa 4-2610 Hanazono, Tokorozawa, Saitama Pioneer Co., Ltd. Tokorozawa factory

Claims (1)

[Scope of utility model registration request] 1. A door device of a recording / reproducing apparatus in which a recording medium is placed on an upper surface of a tray to move the recording medium between a loading / unloading position and a playing position. The mounted door, a first gear provided on the pivot of the door and rotating with opening and closing of the door, and a second gear meshed with the first gear and pivotally supported in the recording / reproducing apparatus. A gear, a swing arm provided coaxially with the second gear on a pivot shaft of the second gear, and engaged with the swing arm to vertically move up and down in conjunction with the movement of the tray. The lifting arm, the second gear, and the swing arm are integrally connected to each other, the turning force of the swing arm is transmitted to the second gear, and the swing arm is fixed and only the second gear rotates. The door in the opposite direction to the swing arm's direction of rotation, exceeding the dead point at some point. A first spring means for rotating the second gear in the closing direction, and a second spring means provided on the swing arm for biasing the swing arm in the closing direction of the door. The door device of the recording and reproducing device.