JPH07147046A - Changer type disk reproducing device - Google Patents

Abstract

PURPOSE:To inexpensively obtain a changer type disk reproducing device which can be fitted to a radio fitting port in a dash board by very simple constitution. CONSTITUTION:When a key is depressed in a state where a large disk 1 is inserted, a tray and a carriage 11 are moved backward and passed through a load position. Besides, the disk 1 on the carriage 11 enters a belt groove. Then, a belt 70 is wound round the outside circumferential surf ace 8 of the disk and a stopper is held at an engagement position by a spring 90. A pulley 72 is pressed and turned by the carriage 11 and separated from the outside circumference of the disk by the turning of an arm 73. Then, the disk is started to be reproduced at a reproducing start position. When the carriage arrives at a reproducing finish position, it is returned to a stop position where it is housed in a stocker 50. In the case of a small disk, it arrives at the reproducing start position by driving the carriage in a prescribed way corresponding to a small diameter and separating the pulley 72 to a position where the belt is not inserted and held. Then, the belt 70 is wound round the disk by a prescribed angle and a reproducing mode is started. At the reproducing finish position, the carriage 11 is returned to the stop position where it is housed in the stocker 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a changer type disc reproducing apparatus capable of selectively reproducing a plurality of discs, and more particularly to a changer type disc reproducing device which is miniaturized so that it can be mounted on a dashboard of an automobile. It relates to the device.

[0002]

2. Description of the Related Art At present, many automobiles are equipped with a DIN (ISO7736) standardized size (width 182 mm, height 53 mm) radio mounting opening in a dashboard, which is small and compact. There is a strong demand for a disc (CD) changer, a so-called in-dash CD changer. However, because the diameter of the CD is as large as 12 cm, it is extremely difficult to realize it, and at the present time, Alpine's in-dash CD changer.
There are only three models (Model Nos. 5980, 7525J) and Victor's recently announced CD changer receiver (Model No. KD-GT7).

[0003]

All of the CD changers manufactured by Alpine Electronics Co., Ltd. are described in Japanese Unexamined Patent Publication No. 2-273372, and the disks are exchanged by bringing the magazines out of the apparatus. Therefore, there is a problem that the magazine engages with the gear selection lever of the vehicle depending on the vehicle type and the vehicle type that can be attached is limited. on the other hand,
The Victor CD changer does not have such a problem because the disc change operation is performed inside the device, but since the thin optical mechanism is inserted between the discs in the magazine, the magazine is changed to the disc. There is a problem that the mechanism becomes very complicated because it requires complicated operations such as separation in the axial direction.

[0004]

SUMMARY OF THE INVENTION The present invention provides a changer type disk reproducing apparatus which solves the above problems, and a stocker for accommodating a plurality of disks coaxially.
Selection means for selecting one of the plurality of disks stored in the stocker, playback means arranged in a position close to the disk in the stocker, and a stop position for storing the one disk in the stocker And the reproducing means moves the innermost track of the disc to a reproduction start position at which reproduction is possible, and in the reproducing state, by moving the one disc, the position in the disc radial direction with respect to the reproducing means is changed. It is composed of a first disc moving unit and a disc rotation driving unit that winds the one disc around the outer circumference of the one disc by a belt drive regardless of the movement of the one disc in the reproducing state.

[0005]

According to the above-described apparatus of the present invention, one disk is selected from the plurality of disks stored in the stocker by the selecting means, and the selected disk is moved from the stop position by the first disk moving means. It is brought to the playback start position. The selected disc is belt-driven by the disc rotation drive means, and its information is read by the reproduction means, and is gradually sent toward the stop position as the disc is reproduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the device of the present invention will be described below with reference to the drawings. The device of this embodiment accommodates five compact discs (CDs) in the device and enables in-dash CD changer to selectively reproduce the discs.
Are configured. Further, the housing 10 is attached to a radio mounting opening formed in the dashboard,
Width W is 180 mm, height T is 50 mm, depth D is 18
It is configured to have a thickness of 0 mm (see FIG. 1), and the rear body of 165 mm is inserted into the opening except the front panel portion 20 having a thickness of 15 mm.

FIG. 1 is a perspective view of a main part of the apparatus of this embodiment showing a state where a large-diameter disk 1 having a diameter of 12 cm is brought to a reproduction start position. The front side of the device is in a stopped state (Fig. 7)
In, a stocker 50 that coaxially supports the carriages 11 to 15 is arranged. As shown in FIG. 2, each carriage has a shaft 40 erected at the substantially center thereof, and a turntable 42 is inserted into the shaft 40 via a washer 41 and stopped by a ring 44. A magnet ring 43 is adhered to a groove 42 'formed on the upper surface of the turntable 42, and a magnetic plate 45 is attached to fix the disk 1 placed on the turntable. Also,
Bent portions 46 to 48 to be inserted into slits 33L and 33R of the tray 30 which will be described later are formed on both sides of the carriage 11, and a playback state for playing a large-diameter disc having a diameter of 12 cm is provided on the left rear portion (see 9, FIG. 10),
A guide portion 49A that engages with a shaft 74 attached to an arm 73 that axially supports the driven pulley 72 and moves the pulley 72 to a position separated from the outer peripheral surface of the disk, and a small-diameter disk having a diameter of 8 cm. A guide portion 49B that engages with the shaft 74 and moves the pulley 72 to a separated position is formed in the reproduction state (FIGS. 15 and 16) for reproduction.

In the stopped state (FIG. 7), the stocker 50 is moved up and down by driving a stocker moving mechanism (not shown), and the bending portions 46 to 48 of the selected carriage are moved.
Is controlled to a position aligned with slits 34 and 35 of the tray 30 described later. According to FIG. 1, the stocker 50 is brought to a position where the folded portions 46 to 48 of the carriage 11 are aligned with the slits 34 and 35 of the tray 30. In addition,
For details of the stocker moving mechanism, refer to Japanese Patent Application No. 2-143216 (Japanese Patent Application Laid-Open No. 4-38663), Japanese Patent Application No. 5-51177, etc. filed by the present applicant.

On both sides of a carriage coaxially supported in the stocker 50, a tray 30 composed of arms 31 and 32 is arranged so as to be movable in the front-rear direction of the apparatus. The arms 31 and 32 are not shown in the drawing.
It is connected by the gut and moves together. The right side surface of the arm 31 is formed with a slit 34 including slits 340 and 341 for guiding the bending portion 46 of the selected carriage, and the left side surface of the arm 32 is the bending portion of the selected carriage. A slit 35 including slits 350 to 352 that guides 47 and 48 is formed (see FIGS. 5 to 10). Further, in order to allow the stocker 50 to move up and down, the arm 31 is formed with a vertical groove 36 for avoiding the bent portion 46 of the carriage at the stop position, and the left side surface of the arm 32 bends the carriage. Vertical grooves 37 and 38 are formed so as to avoid the portions 47 and 48, respectively.

The selected carriage is driven by a tray / carriage moving mechanism (not shown), moves between the load position shown in FIG. 6 and the reproduction start position shown in FIG. 9, and is integrated with the tray 30. Thus, it moves between the load position shown in FIG. 6 and the eject position shown in FIG. For details of the tray / carriage moving mechanism, Japanese Patent Application No. 2-143212 (Japanese Patent Application Laid-Open No. 4-38659), Japanese Patent Application No. 5-51180, etc., filed by the present applicant, can be referred to.

On the other hand, on the rear side of the apparatus, a belt 70, which winds around the disk outer peripheral surface 8 on the selected carriage and drives the disk to rotate, is stretched between a drive pulley 71 and a driven pulley 72. There is. The pulley 71 is a rotary shaft 7 of a motor 76 fixed to a main chassis (not shown) of the apparatus.
8, the pulley 72 is rotatably supported by a shaft 74 of an arm 73 pivotally supported by the main chassis. The arm 73 is biased counterclockwise by the spring 90, and in the stopped state (Fig. 7), the belt 70
Is positioned by a stopper 91 so that the disk extends in a direction inclined with respect to the loading direction of the disk.
Further, the arm 73 has its tip bent in a U-shape, and the bent portion 77 has a bent portion 77 at the guide portion 4 of the carriage.
Attached is a pin 79 that engages 9A or 49B. An optical head 60 for reading information recorded on a disc on a selected carriage by an optical beam is fixedly arranged on the main chassis.

According to a study by the present applicant, in addition to the first disc whose outer peripheral surface 8 is relatively steep as shown in FIG.
As shown in FIG. 4, it was found that there are two types of second discs having a tapered outer peripheral surface 8. According to the apparatus of this embodiment, since both of these discs are stably driven to rotate, the above-mentioned disc drive belt 70 has the groove 80 having the cross-sectional shape shown in FIGS. 3 and 4 in the belt longitudinal direction. It is formed over. Introducing surfaces 81A, 81B having a included angle of about 70 degrees are formed at the entrance of the groove 80 to facilitate the introduction of the disc. And the introduction surface 81
A and the corners of the upper wall 82, and the corners of the introduction surface 81B and the lower wall 84 are provided with convex portions 83A and 83B that face the upper and lower surfaces of the above-described first disk and restrict the disk surface runout. A vertical side wall 85, which is formed and engages with the outer peripheral surface 8 of the disk and imparts rotation to the disk, is formed at the back of the groove 80.
On the other hand, since the outer peripheral surface 8 of the second disk is tapered, the above-mentioned convex portions 83A and 83B have a large clearance with the disk, and the disk surface runout cannot be regulated. Therefore, a concave portion 86 for receiving the tip of the outer peripheral surface 8 of the second disk is formed at a substantially central height position of the side wall 85, and this concave portion 86 regulates surface wobbling of the second disk and rotates the disk. Give power.

An operation example of the above-described embodiment apparatus will be described below. For example, when an eject / load key (not shown) is operated to bring the disc 1 to the eject position, the selected carriage 1 at the stop position (FIG. 7) is operated.
1 is driven by the tray / carriage moving mechanism toward the front side of the apparatus, and the bent portions 46 to 48 are slits 3 respectively.
It moves while being guided by 41, 352, and 350. Then, the folded portions 46 and 47 of the carriage 11 are engaged with the slit front end faces 342 and 353 (FIG. 6), and the tray 30 is moved. By this movement, the tray 30 is connected to the gear (not shown) of the tray / carriage moving mechanism and is driven together with the carriage 11. When the carriage 11 is further moved, the carriage 11 is disengaged from the gear of the tray / carriage moving mechanism, but is locked to the tray 30 by a lock mechanism (not shown) provided on the tray side, so that the disc can be attached / detached together with the tray 30. It is brought to the eject position (Fig. 5).

When a reproduction key (not shown) is operated in the eject state (FIG. 5) in order to reproduce the large-diameter disk 1 having a diameter of 12 cm, the tray 30 and the carriage 11 move integrally toward the rear of the apparatus. , Brought to the load position (Fig. 6). Tray 30 in the load position
Disengages from the gear of the tray / carriage moving mechanism,
A lock mechanism (not shown) locks the main chassis and holds it in that position. On the other hand, the carriage 11 is further driven toward the rear side of the apparatus by the tray / carriage moving mechanism, and the bent portions 46 to 48 have slits 340, 350 and 35, respectively, via the stop position (FIG. 7).
It is moved in the tray by being guided by 1. The disk 1 on the carriage 11 enters the groove 80 of the belt 70 from a position close to the pulley 72, and the belt 70 gradually begins to wind around the outer peripheral surface 8. During this time, the arm 73 receives a clockwise force from the belt 70, but the spring 90 strongly applies a counterclockwise force.
It is always held at a position where it engages with the stopper 91.

When the disc 1 is moved to the position shown in FIG. 8, the belt 70 is wound around the disc 1 at an angle shown by an arrow in the drawing, and the belt 70 is sandwiched between the outer peripheral surface 8 and the pulley 72. . Therefore, thereafter, the carriage 11 presses the pulley 72 by the outer peripheral surface 8 of the disk, and the arm 73 is pressed.
Is rotated clockwise against the biasing force of the spring 90. Then, the pin 79 provided on the arm 73 is attached to the carriage 1
The carriage 11 is brought to a position where it engages with the guide portion 49A, and the carriage 11 pushes the pin 79 by the guide portion 49A to rotate the arm 73 in the clockwise direction to move the pulley 72 to the outer periphery of the disk 1. Separated from surface 8. After that, the carriage 11 moves the pin 79 by its guide portion 49A,
Between the reproduction start position where the optical head 60 can reproduce the innermost track 6 of the disc 1 (FIG. 9) and the reproduction end position where the optical head 60 can reproduce the outermost track 7 of the disc 1 (FIG. 10). While the carriage is being moved, the pulley 72 is moved to a position where it does not hold the belt 70 between itself and the outer peripheral surface 8 of the disk.

When the disc 1 is moved to the reproduction start position shown in FIG. 9, the belt 70 is wound around the disc 1 at an angle indicated by a drawing arrow which is smaller than the angle formed by the straight lines connecting the rotation center and the pulleys 71 and 72. Then, the reproduction mode is started. A CLV servo control signal is supplied to the motor 76, the disk 1 is rotationally driven in the clockwise direction at a constant linear velocity, and a focus and tracking servo control signal is supplied to the optical head 60. The information recorded on the disk 1 is read by the beam. Further, a motor (not shown) for driving the tray / carriage moving mechanism is supplied with a feed servo signal (DC component of the tracking error signal) so that the optical beam follows the information track. As the disc is reproduced, the carriage 11 is gradually moved toward the front of the apparatus.

When the reproduction end is detected based on the read signal from the optical head 60, or when the carriage 11 is brought to the reproduction end position (FIG. 10), the above-mentioned necessary reproduction for the disk reproduction is performed. The robot control is stopped, and the carriage 11 is returned to the stop position (FIG. 7) where it is stored in the stocker 50 by the tray / carriage moving mechanism.

Next, in order to reproduce the small-diameter disk 1 having a diameter of 8 cm, the reproduction key is operated in the eject state (FIG. 11).
When (not shown) is operated, the tray 30 and the carriage 11 are moved toward the rear of the apparatus and brought to the load position (FIG. 12) as described above. The carriage 11 is driven further toward the rear of the apparatus by the tray / carriage moving mechanism, and the bent portions 46 to 4 of the carriage 11 are moved through the stop position (FIG. 13).
8 is guided by the slits 340, 350, and 351, respectively, to move in the tray. The disk 1S enters the groove 80 of the belt 70 due to the movement of the carriage 11, but since the diameter thereof is small, at the position shown in FIG.
The belt 70 is not yet sandwiched between the outer peripheral surface 8 and the pulley 72. Therefore, the disc 1S passes without pressing the pulley 72 by the disc outer peripheral surface 8 and without the guide portion 49A of the carriage 11 engaging with the pin 79. However, when the carriage 11 moves to the position shown in FIG. 14, its guide portion 49B engages with the pin 79 and the optical head 60 can reproduce the innermost track 6 of the disc 1S (FIG. 15). And the optical head 60 moves between the reproduction end position (FIG. 16) where the outermost track 7 of the disc 1S can be reproduced, and the belt 70 is not held between the pulley 72 and the disc outer peripheral surface 8. Move it to a separated position.

When the disc 1S is moved to the reproduction start position shown in FIG. 16, the disc 1S has its rotation center and the pulleys 71, 72.
The belt 70 is wound at an angle smaller than the angle formed by the straight lines connecting the lines, and the reproduction mode is started. Various servo controls are started in the same manner as described above, and the information recorded on the disk 1S is read by the optical head 60. Then, when the reproduction end is detected based on the read signal from the optical head 60 or the carriage 11 is brought to the reproduction end position (FIG. 15), the servo control necessary for the above-mentioned disk reproduction is performed. Is stopped and the carriage 11 is moved by the tray / carriage moving mechanism.
Is brought to a stop position (FIG. 13) which is stored in the stocker 50.

On the other hand, when the carriage selection key (not shown) for selecting another carriage is operated in the stopped state, the stocker 50 moves the stocker moving mechanism (not shown).
Driven by the carriage selection key, the folded portions 46 to 48 of the carriage selected by the carriage selection key are brought to a position aligned with the slits 34 and 35 of the tray 30. When the disc selection key is operated in the reproducing state, the carriage is returned to the stop position, and the stocker 50 is moved up and down to select a new carriage, and the disc reproduction on the selected carriage is started. Other various operations are conceivable, but a detailed description thereof will be omitted.

The device of the present invention is not limited to the above embodiment. For example, the belt 70 is stretched between the two pulleys 71 and 72, and the driven pulley 72 is always moved to the separated position by the guide portion of the carriage, but the present invention is not limited to this. For example, as shown in FIGS. 17 and 18, instead of the pulley 72, two pulleys 51, 52 are fixedly arranged on the front and rear of the left side of the carriage, and these three pulleys 71, 51, 52 are arranged. The belt 70 may be stretched around. FIG. 17 shows a large diameter disc 1
Shows the state of being brought to the reproduction start position, and FIG. 18 shows the state of having the small-diameter disc 1S brought to the reproduction start position. The position of the belt 70 in the stopped state is shown by a dotted line.

On the other hand, the belt 70, the pulleys 71 and 72, and the motor 76 may be integrally moved in parallel in the front-rear direction of the apparatus in association with the movement of the carriage. In this case, there is an advantage that the winding angle of the belt does not change depending on the position of the disc.

Further, instead of moving the stocker 50 up and down, the belt 70, the pulleys 71 and 72, the motor 76, and the optical head 60 may be moved up and down integrally to select the carriage. good. In this case, the stocker 50 can be detachably attached to the apparatus like a magazine type CD changer.

[0024]

As described above, according to the device of the present invention, it is possible to provide a changer type disk reproducing device which is mounted in the radio mounting opening in the dashboard, and the structure thereof is very simple. Therefore, cost reduction can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a first embodiment device showing a state where a large-diameter disc 1 is brought to a reproduction start position.

FIG. 2 is a perspective view showing a detailed configuration of a carriage 11.

FIG. 3 is a cross-sectional view showing a relationship between a belt 70 and a peripheral portion of a type 1 disc.

FIG. 4 is a cross-sectional view showing a relationship between a belt 70 and a peripheral edge portion of a type 2 disc.

FIG. 5 is a top view of essential parts of the device of the first embodiment showing a state where the large-diameter disk 1 is brought to the eject position.

FIG. 6 is a main part top view showing a state where the large-diameter disk 1 is brought to the load position.

FIG. 7 is a top view of relevant parts showing a state where the large-diameter disk 1 is brought to a stop position.

FIG. 8 is a main part top view showing a state in the middle of operation.

FIG. 9 is a principal part top view showing a state where the large-diameter disc 1 is brought to the reproduction start position.

FIG. 10 is a principal part top view showing a state where the large-diameter disc 1 is brought to the reproduction end position.

FIG. 11 is a top view of relevant parts of the first embodiment device showing a state where the small diameter disk 1S is brought to the eject position.

FIG. 12 is a top view of relevant parts showing a state where the small diameter disc 1S is brought to the load position.

FIG. 13 is a top view of essential parts showing a state where the small diameter disc 1S is brought to a stop position.

FIG. 14 is a main part top view showing a state in the middle of operation.

FIG. 15 is a top view of relevant parts showing a state where the small-diameter disc 1S is brought to the reproduction start position.

FIG. 16 is a top view of relevant parts showing a state where the small-diameter disc 1S is brought to the reproduction end position.

FIG. 17 is a main part top view of the second embodiment device showing a state where the large-diameter disc 1 is brought to the reproduction start position.

FIG. 18 is a top view of essential parts of the second embodiment device showing a state where the small diameter disc 1S is brought to the reproduction start position.

[Explanation of symbols]

 1 to 5 large diameter disc 1S small diameter disc 8 outer peripheral surface 11 to 15 carriage 30 (31, 32) tray 42 turntable 45 magnetic plate 49A, 49B guide section 50 stocker 51, 52, 72 driven pulley 60 optical head 70 belt 71 drive pulley 73 arm 76 motor 79 pin 90 spring 91 stopper

Claims (8)

[Claims] 1. A stocker for coaxially accommodating a plurality of discs, a selection means for selecting one of the plurality of discs accommodated in the stocker, and a position in the stocker proximate to the discs. The reproducing means and the one disc are moved between a stop position where the disc is stored in the stocker and a reproducing start position where the reproducing means can reproduce the innermost track of the one disc. In the reproducing state, the first disc moving means for changing the position in the disc radial direction with the reproducing means by moving the one disc, and regardless of the movement of the one disc in the reproducing state,
A changer-type disc reproducing apparatus comprising: a disc rotation driving unit that is wound around the outer periphery of the first disc and drives the first disc by a belt. 2. The changer type disc reproducing device according to claim 1, wherein the casing of the disc reproducing device has a width and a depth which are approximately 1.5 times the diameter of the disc. 3. The changer according to claim 1, wherein the stocker is movable in the rotation axis direction of the disk, and the selecting means selects the one disk by moving the stocker. Type disc player. 4. The plurality of discs are rotatably supported by a carriage, respectively, and are movable by the first disc moving means while being supported by the carriage, and the one disc is in the reproduction state. 2. A changer-type disc reproducing apparatus according to claim 1, wherein the center of rotation of the disc is overlapped with the disc in the stocker. 5. The disk rotation drive means comprises a drive motor, a drive pulley rotationally driven by the drive motor,
A driven pulley supported by a rotatable arm, a belt wound around the drive pulley and the driven pulley and wound around the outer periphery of the one disk, and the reproduction state. A control means for moving the driven pulley in conjunction with the movement of the one disc so as to control the driven pulley to a separated position where the belt is not clamped between the outer peripheral surface of the one disc. 2. The changer type disc reproducing apparatus according to claim 1, wherein the changer type disc reproducing apparatus comprises: 6. The control means moves the driven pulley in conjunction with the movement of the large-diameter disc in a reproducing state in which the large-diameter disc is reproduced, and the driven pulley of the large-diameter disc is moved. A first guide means for controlling the belt to a position apart from the outer peripheral surface so as not to hold the belt; and a driven state in which the driven pulley is moved in conjunction with the movement of the small diameter disc in a reproducing state for reproducing the small diameter disc, 6. A changer-type disc according to claim 5, wherein the driven pulley is comprised of an outer peripheral surface of the small-diameter disc and second guide means for controlling the belt to a separated position where the belt is not held. Playback device. 7. The disk rotation driving means comprises a drive motor, a drive pulley rotationally driven by the drive motor,
It is composed of first and second driven pulleys, and a belt which is stretched between the drive pulley and the first and second driven pulleys and wound around the outer periphery of the one disk. 2. The changer type disc reproducing apparatus according to claim 1, wherein 8. A second disc for moving the selected one disc between the stop position and an eject position opposite to the reproduction start position so that the disc can be attached / detached. 2. The changer type disc reproducing apparatus according to claim 1, further comprising moving means.