JPH026537Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Technical field The present invention relates to an opening/closing device for a holder on which a disk is attached.In particular, the holder is opened/closed when the power switch is turned off so that the holder does not stop operating with the holder open. This invention relates to a holder opening/closing device that can operate a motor to close the holder.

(b) Background of the technology DAD engraved with concavities and convexities corresponding to digital signals
2. Description of the Related Art A DAD playback device that optically plays back (digital audio disk) using a laser pickup is known. However, the front-operated type
In a DAD playback device, a holder is configured to be rotated by a motor around its lower end relative to the main body, and a disc is configured to be installed in the holder when it is in the open state. There is.

However, if you turn off the power switch with the holder open, the holder remains open and the DAD
This has the drawback that the playback device stops working, spoiling the aesthetics and getting in the way, so when the power switch is turned off, the holder closes and the DAD playback device stops working after that. preferable.

(C) Main points of the invention The present invention was developed in view of the above points, and the structure is devised so that when the power switch is turned off with the holder open, the rotation of the holder to the closed state is completed. In order to stop the operation of the DAD playback device, connect an auxiliary switch in parallel to the power switch. When the power switch is turned off, the motor for opening and closing the holder is operated to close the holder, and the holder is closed. The apparatus is characterized in that the auxiliary switch is turned off after the closing of the reproducing apparatus is completed, thereby stopping the operation of the reproducing apparatus.

(d) Embodiment FIG. 1 shows a mechanism for opening and closing a holder in a DAD playback device, in which 1 is a holder having a space 4 between a front panel 2 and a rear panel 3, 6 and 7 ( (However, it cannot be seen because it is hidden behind 6.) is a pair of disk holding pins that protrude into the space 4 of the holder 1 through the hole in the back plate 3, 8 is a drive motor, and 9 is the drive motor 8. A worm gear 10 is connected to the shaft of the worm gear 9, and a worm wheel 11 is engaged with the worm gear 9 to rotate.
is a first wheel that rotates coaxially with the worm wheel 10.
A gear 12 is a second gear that engages with the first gear 11, and 13 is a third gear that rotates coaxially with the second gear 12.
14 is a fourth gear that engages with the third gear 13; 15 is a drive plate to which the fourth gear 14 is fixed and rotates by a predetermined angle about a shaft 16; 17 is a drive plate that rotates the second gear 12; A cam 18 fixed to the shaft and rotating together with the second gear 12 is the cam 17.
A rotating plate 20 is driven by the rotating plate 19 and rotates around the shaft 19, and one end of the rotating plate 20 is locked to the rotating plate 18, and the other end is connected to the pair of disk holding pins 6 and 7.
This is a drive rope that is locked to a fixed plate 21.

Next, the operation will be explained. Now, as shown in FIG .
degree) and is in a waiting state. At that time, the cam 17 is in the position shown in FIG.
and 7 are pulled upward by the driving rope 20, and the pair of disk holding pins 6 and 7 fixed to the fixing plate 21 are also at the uppermost position shown.

When the disk 5 is inserted into the space 4 of the holder 1 in the state shown in FIG. The switch turned on by the fixed plate 21 is turned on. The switch is for operating the drive motor 8, and when the disk 5 is inserted and the switch is turned on, the drive motor 8 starts operating. When the drive motor 8 operates, the worm gear 9 fixed to its shaft rotates, and the worm wheel 10 also rotates accordingly. Therefore, the first gear 11, the second gear 12, and the third gear 13 rotate one after another.
The drive plate 15 to which the gear 14 and the fourth gear 14 are fixed starts rotating in the direction of arrow A. Since the holder 1 is configured to rotate together with the drive plate 15, when the drive plate 15 rotates in the direction of arrow A, the shaft 16 also rotates.
The holder 1 rotates in the direction of arrow A around , and the closing of the holder 1 is started.

At the same time, according to the rotation of the second gear 12, the second
The rotation of the cam 17, which rotates simultaneously with the gear 12, is started. When the cam 17 rotates, the rotating plate 18 starts rotating downward about the shaft 19, and the drive rope 20 moves in the direction of loosening, so that the fixing plate 21 and the disk holding pin are rotated accordingly. 6 and 7 start descending. Naturally, the disk 5 placed on the disk holding pins 6 and 7 also descends.

As mentioned above, since the closing operation of the holder 1 and the lowering of the disk 5 are started at the same time, the disk 5 is finally installed in the normal position and the disk 5 is
can be played.

FIG. 2 shows an embodiment of the drive circuit for the motor for opening and closing the holder including the present invention in the above-mentioned DAD playback device, where 22 is a power switch, 23 is a drive circuit for a motor for opening and closing a holder;
is a power supply circuit, 24 is a motor for opening and closing the holder, 2
5 is a drive circuit for the motor 24; 26 is a control circuit for controlling the drive circuit 25; 27 is a manual switch for opening and closing the holder; 28 is a close detection switch for notifying that the holder 1 is in the closed state; 2
9 is an open detection switch that indicates that the holder 1 is in an open state; 30 is a short-circuit switch that works with the power switch 22; 31 is a relay drive circuit; 32
is a relay, and 33 is an auxiliary switch connected in parallel to the power switch 22 and interlocked in the opposite direction to the closed detection switch 28.

Next, the operation will be explained. It is assumed that the power switch 22 is turned on, an operating voltage is applied to each part of the DAD reproducing device, and the holder 1 is in a closed state. In this state, since the holder 1 is closed, the closed detection switch 28 is on, the open detection switch 29 is off, and the power switch 22 is turned on.
The short-circuiting switch 30, which is interlocked with the closing detection switch 28, is on, and the auxiliary switch 33, which is interlocked with the closing detection switch 28 in the opposite direction, is off. Therefore, an "H" signal is applied to the control circuit 26 via the close detection switch 28, and the control circuit 26 receives a first control signal for rotating the motor 24 in the forward direction. It is in a state where it can be supplied to the motor drive circuit 25. In addition, since the short circuit switch 30 is on, the relay drive circuit 31 does not operate, and the relay 32
is off. When the push-push type manual switch 27 is pressed in this state, the control circuit 2
A trigger input is applied to 6, and the first control signal is applied from the control circuit 26 to the motor drive circuit 25 in response. Therefore, the motor 24 rotates in the forward direction, and the opening operation of the holder 1 is started.
When the holder 1 is in the open state, the open detection switch 29 is turned on and the close detection switch 28 is turned on.
is turned off. Then, the first signal from the control circuit 26
The control signal is stopped, and the rotation of the motor 24 is stopped.

In this state, when the manual switch 27 is pressed again, a second control signal is generated from the control circuit 26 to rotate the motor 24 in the opposite direction, depending on the states of the open detection switch 29 and the closed detection switch 28. . Therefore, the drive circuit 25 drives the motor 24 in the opposite direction, and the closing operation of the holder 1 is started. Then, when the holder 1 is in the closed state,
Closed detection switch 28 is on, open detection switch 29
is turned off, and the second control signal is stopped.

Next, the operation when the power switch 22 is turned off in the holder open state, which is the main point of the present invention, will be explained. As mentioned above, when the holder 1 is in the open state, the open detection switch 29 is on and the close detection switch 28 is off, and operates in the opposite direction to the close detection switch 28. The auxiliary switch 33 is on. When the power switch 22 is turned off in this state, the short circuit switch 30 linked to the power switch 22 is also turned off. Even if the power switch 22 is turned off, the auxiliary switch 33 is turned on, so the supply of AC power supply voltage continues, and a DC voltage is generated at the terminal 34, causing the DAD playback device to Each part continues to be powered.

When the short circuit switch 30 is turned off in response to the power switch 22 being turned off, a DC voltage is applied to the relay drive circuit 31 and the relay drive circuit 31 becomes operational. Therefore, the relay 32 becomes energized, and a DC voltage is applied to the control circuit 26 via the relay 32. Since the DC voltage plays the same role as a trigger input when the manual switch 27 is pressed, the control circuit 26 generates a second control signal, and the motor drive circuit 25 controls the motor 2.
4 in the opposite direction. Therefore, the closing operation of holder 1 is started, and after a predetermined period of time, holder 1
When the switch is closed, the close detection switch 28 is turned on, and the auxiliary switch 33, which operates in the opposite direction, is turned off and the power is cut off.

In addition, since the close detection switch 28 is turned on only when the holder 1 is in the closed state,
When the holder 1 is in the closing and opening operation, it is off and the auxiliary switch 33 is on, so if the power switch 22 is turned off during that time, the holder 1 is in the open state. same as,
A closing operation of the holder 1 is performed. Further, when the holder 1 is in the closed state, the auxiliary switch 33
Since the power switch 22 is turned off, the power is cut off at the same time as the power switch 22 is turned off, and erroneous opening/closing operations of the holder 1 do not occur.

(d) Effects As described above, according to the present invention, even if the power switch is turned off while the holder is not closed, the closing operation of the holder is immediately started without cutting off the power, and the holder is closed. Since the power is cut off after the holder is closed, the power is cut off while the holder is open, and it is possible to prevent malfunctions or accidents caused by dust or foreign matter being inserted into the device from the holder.

[Brief explanation of drawings]

FIG. 1 is a side view for explaining the opening and closing operation of the holder, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. Explanation of main drawing numbers: 1 ...Holder, 22...Power switch, 24...Motor, 26...Control circuit, 28...
Closed detection switch, 33...auxiliary switch.

Claims (1)

[Scope of utility model registration request] A disk holder opening/closing device for opening and closing a holder on which a disk is mounted relative to a main body, the device comprising: a power switch, a motor for opening and closing the holder, a driving means for driving the motor, and a drive means for driving the motor; a closed detection means for detecting that the power switch is in a closed state; a signal generation means for generating a signal when the power switch is turned off; A control means for controlling the driving means, and an auxiliary switch connected in parallel to the power switch and turned off when the closed state of the holder is detected by the closed detection means, and the auxiliary switch is turned off when the closed state of the holder is detected by the closed state detecting means. 2. An opening/closing device for a disk holder, characterized in that the driving means is controlled so as to prevent the power from being cut off and to close the holder by turning off the power switch when the power switch is not turned off.