JP3227370B2 - Cartridge incorrect insertion prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk reproducing apparatus for recording or reproducing a disk stored in a cartridge, and more particularly to a means for preventing erroneous insertion of a cartridge.

[0002]

2. Description of the Related Art Conventionally, in a disk reproducing apparatus for reproducing a disk housed in a cartridge, a groove extending in the insertion direction is provided in the cartridge, and a holder for holding the cartridge is provided with a projection which protrudes into the groove of the cartridge. Had been prevented.

An example of a disk housed in a cartridge is a magneto-optical disk called a so-called mini disk (MD). FIG. 11 shows the shape of the cartridge containing the MD. The cartridge 20 shown in FIG. 11 houses the MD and slidably supports the shutter 20a. The lower surface of the cartridge 20 is provided with a hole 20g for exposing a magnetic metal plate provided at the center of the lower surface of the MD.

On the front left and right sides of the cartridge 20, grooves 20c and 20d extending in the front-rear direction are provided at positions off the center in the thickness direction. An elastic locking member for locking the shutter 20 a is provided inside the cartridge 20. The lock member is elastically deformed by the plate-shaped member protruding into the groove 20c to release the lock of the shutter 20a. A recess 20 is formed in the front left and right lower surfaces of the cartridge 20.
e and 20f are provided.

When the shutter 20 is unlocked,
The shutter 20a is opened and closed by the shutter opening / closing member that has entered the hole 20b. When the cartridge 20 is mounted at the playback position, the shutter 20a is opened, and the MD is driven to rotate by a turntable on which a magnetic metal plate is adsorbed, and is played back by an optical pickup through the opening of the shutter 20a. .

FIG. 12 shows a holder 21 for holding the cartridge. Folded pieces 21a on both sides of holder 21
And 21b are provided. When the cartridge 20 is inserted into the holder 21 with the recesses 20e and 20f first in a normal posture, that is, with the hole 20g shown in FIG. 11A facing the lower surface, the bent pieces 21a and 21b respectively become the grooves 20c and 20c. Get into 20d. Cartridge 2
If 0 is inserted upside down in a normal posture, the bent pieces 21a and 21b and the grooves 20c and 20d have different heights, so that the bent pieces 21a and 21b prevent the cartridge 20 from entering. When the cartridge 20 is inserted sideways, the bent pieces 21a and 21b and
Since the positions of c and 20d are different, the bent pieces 21a and 21b prevent the cartridge 20 from entering. In a conventional disk reproducing apparatus, such a holder is used to prevent erroneous insertion of a cartridge.

[0007]

Since the bent piece of the holder of the above-mentioned conventional disk reproducing apparatus is fixed,
The cartridge cannot pass through the holder. Therefore, in the disc reproducing apparatus with a changer, if the holder is arranged only in the reproducing position, the erroneous insertion is not detected when the cartridge is inserted into the stocker, and the erroneous insertion is detected only when the cartridge is moved from the stocker to the reproducing position. You. Such a disk reproducing device is extremely inconvenient.

In order to detect an erroneous insertion when a cartridge is inserted into a stocker, it is necessary to arrange a holder on each shelf of the stocker and transfer the cartridge to the reproducing position together with the holder. The stocker is large because it accommodates many holders larger than the cartridge. In addition, there is a disadvantage that the transfer mechanism of the cartridge becomes large-scale and a large number of holders are required, thereby increasing the manufacturing cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a compact and low-cost cartridge erroneous insertion prevention device capable of obtaining an easy-to-use disk reproducing device. Is to provide.

[0010]

SUMMARY OF THE INVENTION According to the present invention, there is provided a cartridge mis-insertion preventing apparatus which feeds a cartridge in response to a cartridge insertion passage provided with a recess at a specific height at a specific peripheral position in contact with the periphery of the cartridge. A roller, a sliding contact which is responsive to the depression, a first detecting means for detecting a displacement of the feed roller, and a second detecting means for detecting a displacement of the sliding contact. The first detecting means and the second detecting means detect the erroneous insertion of the cartridge by operating timing, and when the cartridge is erroneously inserted, the feed roller discharges the cartridge from the insertion passage. Things.

[0011] In the cartridge mis-insertion preventing device, the first arm is rotatably supported by the chassis.
A second arm rotatably supported by the first arm;
The second arm supports the feed roller and the first detecting means, and the first arm is rotated after the second arm is turned away from the insertion passage against an urging force. The arm is configured to be turned away from the insertion passage against the urging force.

Normally, the cartridge is formed in a rectangular shape, and by setting the moving range of the feed roller so that it can respond to the cartridge being inserted in any direction, when the cartridge is inserted into the insertion passage, First,
Can be configured to operate. Also, the cartridge is inserted into the insertion passage in the normal posture by making the sliding contact protrude into the recess of the specific height at the specific position of the cartridge only when the cartridge is inserted into the insertion passage in the normal posture. The second displacement detecting means can detect that the sliding contact has entered the recess only when the sliding contact has occurred. Since the cartridge is normally inserted at a speed in a predetermined range, the cartridge is erroneously detected at the timing of the operation of the first detection means and the second detection means when the cartridge is inserted into the insertion passage in the above normal posture. Insertion can be detected.

By configuring the feed roller to eject the cartridge when it is erroneously inserted, the processing at the time of erroneous insertion is simplified. Further, if the feed roller is supported by the second arm supported by the first arm and the displacement of the second arm is detected, even if the moving range of the feed roller is large, an actuator such as a microswitch can be used. The displacement detecting means having a small operation stroke can be used.

By arranging the erroneous insertion preventing device at the cartridge insertion opening of the disc reproducing device with a changer, a user-friendly disc reproducing device can be constructed in which erroneous insertion of the cartridge is prevented when the cartridge is inserted.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a cartridge erroneous insertion prevention device to which the present invention is applied will be described with reference to the drawings. FIG.
1 is an exploded perspective view showing a cartridge erroneous insertion prevention device according to an embodiment of the present invention. The insertion direction of the cartridge 20 in the normal posture described with reference to FIG. 11 is indicated by an arrow.
A first arm 2 is rotatably supported on a shaft 1a erected on the chassis 1, and is pressed against a stopper 1c erected on the chassis 1 by a torsion coil spring 11 mounted on the shaft 1a. The first arm 2 is rotatable within a range restricted by a stopper 1c and a stopper 1d erected on the chassis 1.

A second arm 3 is rotatably supported on a shaft 2a erected on the first arm 2, and is erected on the first arm 2 by a torsion coil spring 12 mounted on the shaft 2a. Is pressed against the stopper 2b. The second arm 3 is rotatable within a range regulated by a stopper 2b and a stopper 2c provided upright on the first arm. A shaft 3a erected on the second arm 3 rotatably supports the feed roller 4.

A motor 5 fixed to the chassis 1 transmits rotation to a gear 7 with a pulley rotatably supported on a shaft 1a via a pulley 6 and a belt 9. Gear 7 with pulley
Is meshed with a gear 8 with a pulley rotatably supported on the shaft 2a. The rotation of the gear 7 with a pulley is transmitted to the feed roller 4 via the gear 8 with a pulley and a belt 10. Micro switch 16 fixed to first arm 2
When the second arm 3 is rotated counterclockwise as viewed from below, the second arm 3 is pushed by the second arm 3 to output an H signal.

A lever 13 is rotatably supported on a shaft 1b erected on the chassis 1, and is urged in a counterclockwise direction as viewed from below by a torsion coil spring 14 mounted on the shaft 1b. . The lever 13 normally pushes the microswitch 15 fixed to the chassis 1, and the microswitch 15 outputs an H signal. Micro switch 15
And 16 are input to the control circuit, and the motor 5 is driven forward and reverse by the control circuit.

FIG. 2 shows the rotating state of the first arm 2 and the second arm 3. FIG. 2 shows the first arm 2 and the second arm 2.
Of the arm 3 is viewed from below. FIG. 2A shows a state in which the feed roller 4 is not pressed by the cartridge.
At this time, the first arm 2 is pressed against the stopper 1c, and the second arm 3 is pressed against the stopper 2b. Then, the microswitch 16 outputs an L signal.

FIG. 2B shows a state where the feed roller 4 is being moved by being pushed by the cartridge. At this time, since the biasing force of the torsion coil spring 11 is larger than the biasing force of the torsion coil spring 12, the second arm is rotated first. Therefore, the first arm 2 remains pressed against the stopper 1c. However, the micro switch 16 outputs an H signal.

FIG. 2C shows a state where the feed roller 4 is further pressed. After the second arm is pressed against the stopper 2c, the first arm 2 rotates. And
The first arm 2 moves away from the stopper 1c. The state in which the micro switch 16 is outputting the H signal does not change.

FIG. 3 and FIG. 4 show the positional relationship among the cartridge 20, the feed roller 4 and the lever 13 to be inserted. The cartridge 20 is a guide 1 fixed to the chassis.
Guided to 7. Although not shown in FIG. 1, the guide 17 is arranged at a position in the projecting direction of the feed roller 4.
FIG. 3 shows a state where the cartridge 20 is inserted in a normal posture.

FIG. 4 shows a state where the cartridge 20 is inserted after being rotated by 90 ° from a normal posture. The distance between the feed roller 4 and the opposing inner surface of the guide 17 when not pressed by the cartridge 20 is S, and the lever 1
The distance between the inner surface 3 and the opposing inner surface of the guide 17 is L.
3 and FIG. 4, the dimensions perpendicular to the insertion direction of the cartridge 20 are denoted by A and B, where A> B.
It is. That is, the cartridge 20 is a rectangle having a long normal end in the insertion direction.

The above dimensions have a relationship of S <B <L <A. Therefore, the output signal of the microswitch 16 changes from L to H both when the cartridge 20 is inserted in a normal state and when the microswitch 16 is inserted in a state rotated by 90 ° from a normal posture. On the other hand, the micro switch 15
When 0 is inserted in a normal state, the output signal changes from H to L, but when inserted in a state rotated 90 ° from a normal posture, the output signal remains at H.

FIGS. 5 and 6 show the operating states of the respective arms and levers when the cartridge 20 is inserted in a normal state. The cartridge 20 is shown in FIGS.
(B), FIG. 5 (c), FIG. 6 (a), and FIG. 6 (b). FIG. 7A shows an AA cross section in FIG. FIG. 7B shows a BB cross section in FIG. 6A.

As shown in the drawing, the feed roller 4 is in contact with the entire side surface of the cartridge 20 in the thickness direction. The depth of the recess 20f of the cartridge 20 is about 1 of the thickness t of the cartridge.
/ 2, and the thickness of the tip of the lever 13 is smaller than that. The height of the lower surface of the lever 13 is
0 coincides with the height of the lower surface. Therefore, the tip of the lever 13 enters the recess 20f after being pushed by the cartridge 20.

FIG. 7C shows a microswitch 16 (S in FIG. 7) when the cartridge 20 is inserted in a normal state.
W1) shows an operation time chart of the microswitch 15 (SW2 shown) and the motor. The timer of the control device SW1 is set a certain time t ₀ from when H. The time when SW1 becomes H is time 0. SW2 becomes H at time t ₁ from once a L. t ₁ <t ₀ . it is determined that the cartridge 20 is inserted in a normal state at time t ₁ the motor is forward cartridge 20
Is sent into the apparatus.

The situation when the cartridge 20 is inserted with the cartridge 20 turned over from the normal state will be described with reference to FIG. FIGS. 8 (a) and 8 (b) show cross sections at positions corresponding to FIGS. 7 (a) and 7 (b). In this case, the tip of the lever 13 does not enter the recess of the cartridge 20. FIG. 8C shows an operation time chart of the microswitch and the motor in this case. H After controller that SW1 is the SW2 in a timely t ₀ from when H becomes L
If not, it is determined that the cartridge 20 has been incorrectly inserted, and the motor is rotated in the reverse direction to eject the cartridge 20.

The state when the cartridge 20 is inserted backward with respect to the normal state will be described with reference to FIG.
In this case, the tip of the lever 13 does not enter the recess of the cartridge 20 as shown in FIG. FIG. 9B shows an operation time chart of the microswitch and the motor in this case. Controller SW1 to eject the cartridge 20 by reversing the judges that may not become H cartridge 20 after SW2 in a timely t ₀ from when H becomes L is erroneously inserted motor.

When the cartridge 20 is in the normal state,
The state of insertion when rotated 0 ° will be described with reference to FIG. In this case, the tip of the lever 13 does not contact the cartridge 20 as shown in FIG. FIG.
FIG. 0 (b) shows an operation time chart of the microswitch and the motor in this case. Controller SW1 to eject the cartridge 20 by reversing the determined and SW2 in a timely t ₀ from when H is inserted cartridge 20 is erroneous if not an L motor.

When the cartridge is to be prevented from being erroneously inserted into a disk device with a changer, the above mechanism is disposed between the cartridge insertion port of the housing and the stocker for accommodating a plurality of cartridges. Immediately after the cartridge is inserted by such a configuration, erroneous insertion is determined,
The device becomes easy to use.

[0032]

According to the cartridge erroneous insertion preventing device of the present invention, erroneous insertion is prevented when the cartridge is inserted by merely arranging one erroneous insertion preventing device at the insertion slot of the cartridge. Become. By applying the present invention to a disk device with a changer, it is not necessary to use a large number of holders for preventing erroneous insertion, so that the device can be made compact and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a main part of a cartridge erroneous insertion prevention device according to an embodiment of the present invention.

FIG. 2 is a partial bottom view showing an operation state of the cartridge incorrect insertion prevention device.

FIG. 3 is a partial bottom view showing a main part of the cartridge incorrect insertion prevention device.

FIG. 4 is a partial bottom view showing a main part of the cartridge incorrect insertion prevention device.

FIG. 5 is a partial bottom view showing the operation of the cartridge incorrect insertion prevention device.

FIG. 6 is a partial bottom view showing the operation of the cartridge erroneous insertion prevention device.

7A is a partial cross-sectional view showing the operation of the cartridge erroneous insertion prevention device, FIG. 7B is a partial cross-sectional view showing the operation of the cartridge erroneous insertion prevention device, and FIG. 4 is a time chart showing the operation of the cartridge incorrect insertion prevention device.

8A is a partial cross-sectional view showing the operation of the cartridge erroneous insertion prevention device, FIG. 8B is a partial cross-sectional view showing the operation of the cartridge erroneous insertion prevention device, and FIG. 4 is a time chart showing the operation of the cartridge incorrect insertion prevention device.

9 (a) is a partial bottom view showing the operation of the cartridge incorrect insertion prevention device of the same insertion prevention device, and FIG. 9 (b).
5 is a time chart showing the operation of the cartridge incorrect insertion prevention device.

10 (a) is a partial bottom view showing the operation of the cartridge incorrect insertion prevention device of the same insertion prevention device, FIG.
(B) is a time chart showing the operation of the cartridge incorrect insertion prevention device.

FIG. 11A is a plan view showing a recording medium cartridge used in the cartridge erroneous insertion preventing device of the present invention in an inverted state, and FIG. 11B is a front view showing the recording medium cartridge in an inverted state. FIG. 11C is a left side view showing the recording medium cartridge in an inverted state,
FIG. 11D is a right side view showing the recording medium cartridge in an inverted state.

FIG. 12 is a perspective view showing a holder used for preventing incorrect insertion of a cartridge in a conventional disk reproducing apparatus.

[Explanation of symbols]

Reference Signs List 1 chassis, 1a, 1b axis, 1c, 1d stopper 2 first arm, 2a axis, 2b, 2c stopper 3 second arm, 3a axis 4 feed roller 5 motor 6 pulley 7, 8 gear with pulley 9, 10 belt 11, 12 torsion coil spring 13 lever 14 torsion coil spring 15, 16 micro switch 17 guide 20 cartridge, 20a shutter, 20b
Hole, 20c, 20d groove, 20e, 20f recess, 20
g hole 21 holder, 21a, 21b bent piece

Claims (2)

(57) [Claims] A feed roller which is responsive to the periphery of the cartridge and feeds the cartridge in a cartridge insertion passage provided with a recess at a specific height at a specific position in the vicinity; A first detecting means for detecting a displacement of the feed roller, and a second detecting means for detecting a displacement of the sliding contact, wherein the first detecting means and the second detecting means A cartridge erroneous insertion prevention device configured to detect erroneous insertion of a cartridge based on operation timing and discharge the cartridge from the insertion passage by the feed roller when the cartridge is erroneously inserted. 2. A first arm is rotatably supported by a chassis, a second arm is rotatably supported by the first arm, and the second arm has the feed roller and the first arm. And the first arm is separated from the insertion passage against the urging force after the second arm is rotated away from the insertion passage against the urging force. The cartridge erroneous insertion prevention device according to claim 1, wherein the device is configured to be rotated as described above.