JPH0237155Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a disc loading device that is used in digital audio disc players, video disc players, record players, etc., and clamps the disc after it is conveyed onto a turntable.

[Background technology] A front-loading type compact disc player (CD player), etc. has a tray that locks a disc and transports the disc onto and from the turntable at will, and a tray that transports the disc onto the turntable using this tray. It is equipped with a clamper that presses against the turntable.

Therefore, in order to load the disk, a transport operation of moving the tray onto the turntable,
It is necessary to lower the disk receiving plate of the tray and drop the disk onto the turntable, and at the same time to perform a clamper operation of lowering the clamper onto the turntable and pressing the disk.

In conventional disk loading devices, separate dedicated motor drive mechanisms are used for tray conveyance operation and clamper operation.

Therefore, a large number of parts such as motors and gears that make up the drive mechanism are required, and the configuration of the control circuit including limit switches to control the operation timing of each motor is also complicated, making the overall cost of the device high. It had the disadvantage of being sticky.

[Purpose of the invention] Taking the above facts into consideration, the purpose of the present invention is to obtain a disk loading device with a simple configuration and low cost, which can continuously perform tray conveyance operation and clamper operation using one drive mechanism. It is.

[Configuration of the invention] In the disk loading device according to the invention,
A slidable rack is provided on the tray, and the rack is slid back and forth by a drive device installed in the chassis. Further, the tray is provided with an engaging member whose one end is fixed to the tray and whose other end is selectively engaged with the rack or chassis side.

Then, the rack-side engagement guide part provided on the rack engages the engagement member as the rack moves in the feeding direction, releases the tray from the chassis, fixes the rack on the tray, and transports the tray under the operation of the drive device. It makes it possible.

On the other hand, the chassis-side engagement guide part provided on the chassis engages the engagement member as the tray moves in the storage direction, fixing the tray to the chassis on the turntable, and releases the rack from the tray to activate the drive device. The rack can be slid on the tray as it is operated.

A pinion is connected to a rack that slides on the tray when the tray is fixed on the turntable, and the rotational force of this pinion is used to move the moving frame in a predetermined direction on the chassis. . The movement of the moving frame is converted into an up/down movement of the disk support plate by a disk support plate elevating mechanism, and is converted into an up/down movement of the clamper by a clamper elevating mechanism to perform a clamping operation.

Therefore, when the engaging member fixed to the tray is engaged with the rack-side engagement guide part, when the rack is driven, the entire tray moves back and forth, allowing the disk to be freely transported on and off the turntable. can. Further, when the engaging member is engaged with the chassis side engagement guide portion, when the rack is driven, the rack moves on the tray and the disk receiving plate and the clamper can be raised and lowered.

Since the switching operation between the chassis side and the rack side of the engaging member is automatically performed in accordance with the movement of the rack, it is possible to perform the tray conveying operation and the clamping operation continuously by one drive device.

[Embodiments of the invention] Hereinafter, embodiments of a disc loading device for a CD player according to the invention will be described with reference to the drawings.

As shown in FIG. 2, a box-shaped tray 12 is installed at the top of the main chassis 10. This tray 12 has side frame members 14 arranged from both left and right ends toward the rear. Rollers 18 provided at both ends of the front portion of the main chassis 10 are fitted into guide grooves 16 formed along both left and right sides, so that the tray 12 is configured to be slidable in the front and rear directions. This sliding movement of the tray 12 is performed by a drive mechanism (see FIG. 3) 132 including a motor 130 installed under the main chassis 10 before the start of play and after the end of play, and the disk 22 is automatically taken in and out. Ru. The backward movement of the tray 12 is restricted by a pin 164 at the tip of a switching lever 160 provided on the tray 12 engaging with a chassis-side engagement guide portion 176 of the main chassis 10. Tray 12 is the main chassis 10
It is located on a turntable 26 provided above the front part of the camera. Further, the forward movement of the tray 12 is controlled by a stopper 136 provided at the front of the main chassis 10.
It is restricted by the pin 164 coming into contact with.

The tray 12 includes a box frame-shaped case 30 having a substantially circular opening 28 on the top surface, a substantially disc-shaped receiving plate 32 that is movable up and down in the circular opening 28, and a case 2.
6, and a movable rack plate 138 provided inside the lower right end of the case 26 along the front-rear direction.

On the upper surface of the case 26, recesses 36,
37 are formed, and the disc 22 can be placed gently on the tray 12 by inserting fingers into the recesses 36 and 37, and the disc 22 can be easily taken out from the tray 12. case 26
The end of the circular opening 28 is bent downward,
The receiving plate 32 is guided at this falling portion 38.

The receiving plate 32 has cushions 40 made of an elastic member at four locations near the peripheral edge, and the cushions 40 lock the disk 22 placed on the receiving plate 32. In addition, the receiving plate 32,
A turntable 26 from the center to the rear end,
U-shaped cutout 4 for exposing the pick-up
2 is provided. This receiving plate 32 is connected to the tray 1
2 is positioned coaxially with the turntable 26 when it is conveyed and positioned on the turntable 26. Further, the receiving plate 32 is configured to be able to move up and down approximately the same distance between the upper position and the lower position of the turntable 26 with the turntable 26 in the middle by the operation of the receiving plate elevating mechanism 34. The turntable 26 is exposed above the character-shaped cutout 42.

The receiving plate elevating mechanism 34 is connected to pins 44 protruding from the four corners of the receiving plate 32, as shown in FIG. This receiving plate lifting/lowering mechanism 34 includes frame fittings 45 disposed along the four inner sides of the case 30.
It consists of a slide plate 48 that is provided on the lower surface side of the left and right side portions so as to be slidable in the front and back direction. Frame fittings 45
is fixed to the case 30 with screws. The slide plate 48 has two long grooves 50 (front and rear) bored in its sliding surface with the frame metal fitting 45, and the slide plate 48 can be slid from the lower side of the slide plate 48 by screws 52 screwed into the frame metal fitting 45 from the bottom side of the slide plate 48 through the long grooves 50. Board 4
8 is supported so as to be slidable in the front and rear directions.

The front and rear ends of the slide plate 48 are each bent upward into an L-shape along the inner edge of the frame metal fitting 45, and the rising plate 54 has a slope-shaped cam groove 56 into which the pin 44 is inserted. is drilled. The cam groove 56 has a horizontal groove 60 connected to the upper and lower ends of the inclined groove 58. Here, the receiving plate 3
2 is restrained from moving forward and backward by the falling portion 38 of the case 26, so when the slide plate 48 moves forward, the pin 44 is pushed down by the cam groove 56, and the entire receiving plate 32 descends. , slide plate 4
8 moves rearward, the pin 44 is pushed upward and the receiving plate 32 is raised.

The rear end of the slide plate 48 on the lower surface side of the frame fitting 45 is bent downward to form a pressing portion 62, and a forward sliding urging force is applied by a moving frame (slider) 64, which will be described later. There is. Further, a tension spring 46 is provided between the frame fitting 45 and the slide plate 48 to bias the slide plate 48 rearward.

The turntable 26 is directly coupled to and driven by the main shaft of a motor 66 mounted on the sub-chassis 64. The sub chassis 64 is connected to the main chassis 1 via an insulator 68 for vibration prevention.
It is attached to 0.

There is a third
As shown in the figure, a rack support plate 144 fixed to the frame metal fitting 45 with screws 140 is provided. The rack support plate 144 extends from near the front end of the tray to the rear end of the side frame member 14.

A movable rack plate 138, which is slightly shorter than the rack support plate 144, is suspended from the lower surface of the rack support plate 144 so as to be slidable in the front-rear direction. That is, as shown in FIG.
Long grooves 146, 148, 150 are bored in the rear part, and movable rack plates 138 are installed in the long grooves 146, 148.
A projecting piece 152 protruding from the upper surface of is locked.

The lower surface of the movable rack plate 138 is provided with a lower rack 154 extending along the entire longitudinal direction, and an upper rack 156 is protruded upward from the long groove 150 at the rear end of the upper surface of the movable rack plate 138. It is set up. Each of the long grooves 146, 148, 150 is formed to a length that allows the movable rack plate 138 to move back and forth within a predetermined range with respect to the rack support plate 144.

The lower rack 154 is always engaged with the final stage gear 158 of the drive mechanism 132, so that when the motor 130 rotates, the movable rack plate 138 is slid back and forth. Upper rack 15
Reference numeral 6 is for meshing with a pinion gear 112, which will be described later, to rotate this pinion gear 112.

A switching lever 160 is rotatably supported on the side of the front end of the long groove 150 of the rack support plate 144.
This switching lever 160 has a easy support plate 14 at its tip.
It has a pin 164 that is loosely inserted into an opening 162 drilled in 4 and then protrudes downward.

On the other hand, near the rear end of the movable rack plate 138,
As shown in FIG. 5, a hook-shaped guide portion 166 is formed on the left end surface and projects obliquely forward to the left, and a U-shaped engagement portion is formed in the center of the plate following the hook-shaped guide portion 166. Rack side engagement guide part 1 consisting of 168
70 are provided.

The pin 16 at the tip of the switching lever 160
4 is the easy-side engagement guide portion 17 as shown in FIG.
0, the movement of the movable rack plate 138 with respect to the rack support plate 144 is restricted, and when the movable rack plate 138 is driven by the drive mechanism 132, the entire tray 12 moves in the front and back direction. There is. Thereby, the tray 12 can be transported onto and from the turntable 26 freely.

Further, the right rear end of the main chassis 10 includes a hook-shaped guide portion 172 that protrudes diagonally forward to the right, and a U-shaped engagement portion 174 that is continuous with the hook-shaped guide portion 172 and formed on the left side. A chassis side engagement guide portion 176 is provided. This chassis-side engagement guide portion 176 is located directly below the rack-side engagement guide portion 170 of the movable rack plate 138 of the tray 12 that has moved rearward.

The switching lever 1 is attached to this chassis side engagement guide portion 176.
When the pin 164 at the tip of the tray 160 is fitted and engaged, the movement of the tray 12 relative to the main chassis 10 is restricted, and at this time the tray 12 is fixed so that the turntable 26 and the receiving plate 32 are coaxial. ing.

As the movable rack plate 138 moves, the chassis side engagement guide section 176 and the rack side engagement guide section 170 are brought into contact with the hook-shaped guide section 166, the U-shaped engagement section 174, and the U-shaped engagement section 174 when viewed from directly above. The joint portion 168 and the hook-shaped guide portion 176 are configured to intersect with each other.

Therefore, the pin 16 is attached to the rack-side engagement guide portion 170.
When the movable rack plate 138 moves backward with the pins 4 engaged, the pin 164 comes into contact with the hook-shaped guide part 176 and is rotated to the left, detaching from the U-shaped engaging part 168 and entering the U-shaped engaging part 174. engaged. At this time, the movable rack plate 138 is released from being restrained by the rack support plate 144, so that the movable rack plate 138 can continue to move further rearward even after the tray 12 has stopped (see FIG. 7).

This backward movement is restricted by the contact piece 178 provided at the rear end of the movable rack plate 138 coming into contact with the rear end of the long groove 150.
8 is stopped.

On the contrary, when the pin 164 is engaged with the chassis side engagement guide part 176, the movable rack plate 138
When the pin 164 moves forward from the rear position with respect to the rack support plate 144, the pin 164 comes into contact with the hook-shaped guide portion 166, rotates to the right, comes off the U-shaped engagement portion 174, and engages with the U-shaped engagement portion 168. will be combined. At this time, the restraint of the tray 12 with respect to the main chassis 10 is released, so the movable rack plate 138 moves forward without stopping, and the tray 12 can move forward together with the movable rack plate 138 (see FIG. 8).

The exit side of the U-shaped engaging portions 168, 174 is pin 1.
The pin 164 is inclined to facilitate the movement of the movable rack plate 138, and the pin 164 engaged with the U-shaped engaging portion 174 or 168 by the linear end surfaces 182, 184 continuing to the exit side allows the movement of the movable rack plate 138. This prevents it from coming off.

When the pin 164 of the switching lever 160 engages with the chassis side engagement guide part 176 and the tray 12 is in a fixed state, the upper rack 156 is coupled with the pinion gear 112, and when the movable rack plate 138 moves relative to the tray 12, the pinion A gear 112 is configured to be rotationally driven.

Above the turntable 26, there is a disk 2 placed on the turntable 26 by lowering the receiving plate 32.
A clamper 70 for pressing the turntable 26 against the turntable 26 is provided.

This clamper 70 is entirely made up of a turntable 26.
It is formed into a disk shape with approximately the same diameter as the turntable 26, and a magnet that attracts the turntable 26 is embedded inside. The clamper 70 has a plurality of flanges 74 projecting laterally near the lower end of the barrel 72, and a large-diameter top plate 76 is screwed to the upper end of the barrel 72.

In the clamper 70 configured in this manner, the barrel 72 provided at the tip of the clamper arm 78 is loosely fitted into the large diameter hole 80 so as to be movable vertically and horizontally. When the clamper 70 is located above, the upper surface plate 76 contacts the clamper arm 78 and the clamper 70 is suspended, and when the clamper 70 rides on the turntable 26 with the disk 22 in between, the clamper arm 78 I'm starting to lose contact.

The clamper 70 is configured to be vertically rotatable by a clamper arm 78. That is, a clamper chassis 80 is fixed to the rear of the main chassis 10 and extends from both left and right ends in a U-shape. The center part slightly at the rear is rotatably supported.

The clamper arm 7 is disposed between the left rear end of the clamper arm 78 and the rear end of the clamper chassis 80.
A tension spring 84 is tensioned to urge the shaft 8 to rotate clockwise in FIG. This clamper arm 78 is operated by the tensile force of the tension spring 84 and the weight of the clamper 70 and the clamper arm 78 when the clamper 70 is located above, and by the weight of the clamper 70 and the clamper arm 78 when the clamper 70 is located below. The suction force acting between the turntables 26 always generates a clockwise rotational moment. An adjustment screw 86 serving as a stopper is screwed into the center of the rear end of the clamper chassis 80, and comes into contact with the rear end of the clamper arm 78 to extend the clockwise rotational movement range. ing. A compression spring 88 for vibration prevention is interposed between the screw 86 and the clamper chassis 80.

The right rear end portion of the clamper arm 78 is bent downward and then extended rearward, and has a first inclined end face 90 with a gentle slope on the front side and a first inclined end face 90 on the rear side as shown in FIG. 3 at the upper end. The second section with a large slope following the section 90
A plate-shaped cam 94 having an inclined end surface 92 is formed. This plate-shaped cam 94 has a function as a driven joint, and a pin 96 as a driving joint installed in the moving frame 64 comes into contact with this plate-shaped cam 94.

Then, when the pin 96 moves forward, a clockwise moment as shown in FIG. At this time, the clamper arm 78 rotates clockwise and the clamper 70 descends.

Conversely, when the pin 96 moves backward, it pushes the plate-like cam 94 downward against the tensile force of the tension spring 84, the weight of the clamper 70 and the clamper arm 78, and the attraction force with the turntable 26, so that the clamper arm 78 is a clamper 70 that rotates in the counterclockwise direction.
rises.

Since the second inclined end face 92 has a steep slope, the speed at which the clamper 70 moves up and down in the upper part of the moving range is fast.On the other hand, the first inclined end face 90 has a gentle slope, so the clamper 70 can move up and down in the lower part of the moving range. The speed at which the elevator moves up and down is slow.

The moving frame 64 is installed close to the lower surface side of the clamper chassis 80. The moving frame 64 includes a top plate 98 disposed parallel to the clamper chassis 80, and an L-shaped contact arm 10 bent downward from the left and right rear ends of the top plate 98.
0, and a U-shaped frame extending portion 10 extending rearward from near the right rear end of the top plate 98 in a downward U-shaped cross section.
It consists of 2. The movable frame 64 is disposed above the clamper arm 78, and the top plate 98 is provided with a hole 99 into which the bearing leg 82 is loosely inserted. Further, the left side plate 103 of the U-shaped frame extension portion 102 is provided close to the plate-shaped cam 94.

Then, the clamper chassis 8 is placed so as to cover the upper surface and right side surface of this U-shaped frame extension portion 102.
An L-shaped frame extending portion 104 is provided that extends rearward from near the right rear end of the upper surface of the vehicle 0 and has an L-shaped cross section. One long groove 106 is bored in the upper surface plate 98 of the moving frame 64 near the left end and two long grooves 106 near the right end, front and back, and a guide piece 108 drilled downward from the clamper chassis 80 engages with this long groove 106. This allows it to be suspended so that it can slide forward and backward.

A pinion gear 112 is pivotally supported on the right side plate 110 of the L-shaped frame extension portion 104 of the clamper chassis 80. A pin 114 is implanted at one location on the peripheral edge of this pinion gear 112, and the left end of this pin 114 passes through an upper semicircular groove 116 cut into the right side plate 110, and then passes through the U-shaped frame extension portion 10.
It is inserted into a vertical groove 120 bored in the right side plate 118 of No. 2. A tension spring 122 is tensioned between the right end of the pin 114 and the main chassis 10.

When the pinion gear 112 rotates clockwise in FIG. 2, the pin 114 installed in the pinion gear 112 rotates clockwise along the upper semicircular groove 116 and moves from the rear position to the front position.
At this time, the tip of the pin 114 presses the U-shaped frame extension portion 102 forward while moving up and down in the vertical groove 120, so that the movable frame 64 moves forward.

Conversely, when the pinion gear 112 rotates counterclockwise, the pin 114 rotates counterclockwise and moves from the front position to the rear position. Therefore pin 1
The tip of the frame 14 presses the U-shaped frame extension part 102 backward while moving up and down in the vertical groove 120, so that the movable frame 64 moves backward.

The pinion gear 112 rotates within the range where the pin 114 contacts the circumferential edge of the upper semicircular groove 116 (approximately 180°)
Therefore, the reciprocating sliding range of the movable frame 64 is also limited.

When the limit frame 64 is located at the rearmost position, the tip of the abutment arm 100 is connected to the slide plate 4 which has been returned to the rear by the tension spring 46 of the tray 12 that has been conveyed and positioned on the turntable 26.
It is designed to be close to the pressing portion 62 of No. 8. Then, when the moving frame 64 moves to the frontmost position, the contact arm 100 presses the slide plate 48 to advance it by a predetermined amount, and the receiving plate 32 moves toward the turntable 26.
It is designed to be in a predetermined position below.

Apart from this, the plate-like cam 9 of the clamper arm 78
The pin 96 connected to the left side plate 103 of the U-shaped frame extension portion 102 projects from the left side plate 103 of the U-shaped frame extension portion 102. When the movable frame 64 is located at the rearmost position, the pin 96 engages with the rear end of the second inclined end surface 92 to return the tip of the clamper arm 78 to the uppermost position. At this time, the tray 12 can be freely conveyed in the front-back direction without coming into contact with the clamper arm 78 and the clamper 70.

Further, when the movable frame 64 moves to the frontmost position, the pin 96 engages with the front end of the first inclined end face 90 and lowers the tip of the clamper arm 78 downward to a predetermined position. At this time, the tip of the clamper arm 78 is attached to the top plate 7 of the clamper 70 which is attracted onto the turntable 26 with the disk 22 in between.
It is located slightly below 6,
Clamper 7 rotating together with turntable 26
0 so that no friction occurs. The lowered position of the clamper arm 78 can be easily adjusted by turning an adjustment screw 86.

The pinion gear 112 described above has gear teeth formed over approximately half the circumference, and the tray 1 is formed on these gear teeth.
2 is fixed on the turntable 26, the above-mentioned upper rack 156 of the movable rack plate 138
are starting to mesh together. A protruding tooth 113 is provided at the beginning of the gear tooth of the pinion gear 112 to facilitate engagement with and release from the upper rack 156. This upper rack 156 is the disk 2
When the tray 12 with the tray 2 locked thereon is conveyed and positioned on the turntable 26, it begins to slide rearward as described above, and when the pinion gear 112 is rotated approximately 180 degrees clockwise, the movable rack plate 138 is moved to the rack support plate. 144, the movement is stopped. Further, when the play of the disk 22 is finished, the upper rack 156 starts sliding forward, causing the pinion gear 112 to move approximately counterclockwise.
It is designed to return by rotating 180°.

Next, the operation of the embodiment configured as described above will be explained.

The tray 12 has been extended forward from the main chassis 10 in advance, and the switching lever 160 is connected to the rack support plate 144 fixed to the box-shaped tray 120.
It is assumed that the movable rack plate 138 is engaged with the rack-side engagement guide portion 170 suspended from the movable rack plate 138.
This state corresponds to the positional relationship between the tray, chassis, and clamper shown in FIG. This is shown in a conceptual diagram shown in FIG. 10. Also, the pinion gear 112 returns counterclockwise, and the clamper 7
It is assumed that 0 is located above. At this time, the receiving plate 32 of the tray 12 is positioned upward because the sliding plate 48 has been returned to the rear by the tension spring 46.

When the disk 22 is placed on the receiving plate 32 and the load switch is pressed, the drive mechanism 132 is operated and the movable rack plate 138 of the tray 12 is slid rearward. Since the switching lever 160 is engaged on the rack side, the tray 12 moves backward as the movable rack plate 138 moves. (See Figure 10).

Next, the rack 126 is engaged with the pinion gear 112, and the tray 12 is connected to the turntable 26.
When it reaches the top, the switching lever 160 engages with the chassis side engagement guide part 176, and the tray 12 is fixed. In this state, the tray, chassis, and clamper are in the positional relationship shown in FIG. 1, and the switching lever 160 in the conceptual diagram shown in FIG.
0 shows a state in which the engagement guide is switched to the chassis side engagement guide.

At this time, since the switching lever 160 and the rack-side engagement guide section 170 are disengaged, the movable rack plate 138
connects and retreats further. Conceptual diagrams of this state are shown in FIGS. 11 and 12. Also, while the upper rack 156 of the movable rack plate presses the protruding teeth 113 of the pinion gear 112, the pinion gear 112
It engages and begins to rotate clockwise. As the pinion gear 112 rotates, the pin 114 moves the moving frame 64 forward. This movement of the moving frame 64 is carried out by converting the movement of the pin 114 in the circumferential direction into the diametrical direction, so that the movement at the beginning and end is slow and the middle movement is fast.

As the moving frame 64 moves forward, the contact arm 1
00 is the pressing part 62 of the slide plate 48 of the tray 12
At the same time, the pin 96 moves forward while contacting the plate-shaped cam 94.

When the slide plate 48 receives a pressing force, it moves forward against the return force of the tension spring 46, and at this time, the cam groove 5
6 pushes down the pin 44 to lower the receiving plate 32.
This downward movement of the receiving plate 32 causes the pin 44 to move into the cam groove 56.
from the upper end to the lower end, and during this time the receiving plate 3
2 moves from a position above the turntable 26 to a position below the turntable 26, with the turntable 26 being approximately the halfway point.

Here, the descending speed of the receiving plate 32 is slow at the beginning and end and fast in the middle, so it moves smoothly.

When the movable frame 64 moves to the frontmost position, the pin 44 comes to the lowest end of the cam groove 56, and the lowering of the receiving plate 32 stops.

On the other hand, when the pin 96 moves forward, the clamper arm 78 is urged to rotate clockwise by the tensile force of the tension spring 84, the weight of the clamper 70, the clamper arm 78, etc.
8 initially rotates clockwise so that the second inclined end surface 92 and pin 96 are kept in contact with each other. At this time, since the angle of inclination of the second inclined end surface 92 is steep, the clamper 70 is quickly lowered. Therefore, the clamper 70, which has returned to the upper predetermined position to avoid contact with the tray 12, can be quickly brought closer to the turntable 26.

Note that when the clamper 70 approaches the turntable 26, the clamper arm 78 is continuously urged to rotate clockwise by the weight of the clamper 70 and the clamper 78 and the attraction force caused by the magnetic force.

When the pin 96 advances and passes the most point of the upper semicircular groove 116, it comes into contact with the first inclined end surface 90 having a gentle slope via the second inclined end surface 92. Similarly to the above, the clamper arm 78 rotates clockwise, but at this time, the clamper 70 slowly descends. The descending speed at this time is approximately the same as the descending speed of the receiving plate 32.

When the pin 96 is located in the middle of the first inclined end surface 90, the clamper 70 is approximately 4 degrees above the turntable 26.
The receiving plate 32 is lowered to a position around 1 mm, and at this time the receiving plate 32 is lowered to the same height as the turntable 26 and the disk 22 is dropped onto the turntable 26.

Furthermore, when the pin 96 moves forward and the clamper 70 descends to approach the turntable 26, the clamper 70 is attracted to the turntable 26 with the disk 22 in between due to magnetic force. As a result, the disk 22 is fixed to the turntable 26.
Note that since the clamper 70 is lowered slowly, no impact is generated during suction.

Even after the clamper 70 is attracted, the pin 96 moves forward to near the lower end of the first inclined end surface 90 and the clamper arm 7
The tip of 8 further descends. Then, the adjustment screw 8 is placed slightly away from the top plate 76 of the clamper 70.
6, the rear end of the clamper arm 78 comes into contact with the clamper arm 78, and the downward movement is stopped.

At this time, the moving frame 64 has moved to the forefront. At this point, the operation of the drive mechanism 132 is stopped and the backward movement of the upper rack 156 is stopped. The stopped pinion gear 112 does not return to the reverse direction (counterclockwise) because the pin 114 is urged downward by the tension spring 122.

When the operation of clamping the disk 22 onto the turntable 26 is completed in this manner, the turntable 26 is driven to rotate and data is read and reproduced by pickup.

As described above, the clamper arm 78 is always urged to rotate clockwise by the tensile force of the tension spring 84, the weight of the clamper 70 and the clamp arm 78, and the suction force acting between it and the turntable 26. Therefore, the plate-shaped cam 94 is connected to the pin 9.
6 is pushed forward. This clamp arm 7
By setting in advance the pressing force that the moving frame 64 receives from 8 to approximately the same magnitude as the return reaction force of the tension spring 46 of the receiving plate elevating mechanism 34, the driving force required to rotate the pinion gear 112 can be reduced. can do.

When play of the disk 22 is completed and the disk 22 is to be taken out, the eject switch is pressed to reverse the drive mechanism 132 and move the movable rack plate 138.
move forward. Then, the upper rack 156 is moved forward and the pinion gear 112 is rotated counterclockwise. Along with this, the pin 114 moves the movable frame 64 backward.

When the movable frame 64 moves backward, the operation is completely opposite to that described above, and the pin 96 presses down the plate-shaped cam 94 to rotate the clamp arm 78 counterclockwise. As a result, the clamp 70 and turntable 2
6 is released, and the clamp 70 is returned upward. Further, the pressure on the slide plate 48 is released,
The receiving plate 32 is returned upward. This receiving plate 32 is
During the return, the disk 22 from which the clamp 70 has been removed is lifted from the turntable 26.

When the movable frame 64 comes to the rearmost position, the clamp 70
When the return of the receiving plate 32 is completed, the upper rack 156
is released from the pinion gear 112, and
The switching lever 160 engages with the rack-side engagement guide portion 170, and the movable rack plate 138 is fixed to the tray 12. (See FIG. 11) Since the pinion gear 112 is biased counterclockwise by the tension spring 122, it will not return in the opposite direction.

In this clamp release operation, the movable frame 64 is pressed rearward by the urging force of the tension spring 46 of the receiving plate elevating mechanism 34, and as described above, this pressing force is applied to the tension spring 84, the clamper 70, and the clamper arm. Since the magnitude is approximately the same as the rotational reaction force of the clamper arm 78 due to the weight of the clamper arm 78 and the suction force, the driving force required to rotate the pinion gear 112 in the counterclockwise direction can be small.

When the switching lever 160 engages with the rack-side engagement guide portion 170, the fixation between the main chassis 10 and the tray 12 is released, so that the tray 12 is extended forward as the movable rack plate 138 continues to move forward. (See FIG. 11) Then, when the tray 12 reaches a predetermined position in front of the main chassis 10, the operation of the drive mechanism 132 is stopped and the tray 12 stops. This allows the disk 22 to be replaced.

Incidentally, even if the operator manually pulls the tray 12 which has been extended forward and stopped, the switching lever 160 abuts against the stopper 136 protruding from the main chassis 10, so that the tray 12 will not be pulled out.

As described above, in this embodiment, the rack is slidably equipped on the tray, and the switching lever provided on the tray is switched to engage either the rack side or the chassis side according to the movement of the rack, and the switching lever engages the rack. When the rack and tray are moved together, the tray is transported, and when the switching lever engages with the chassis, the tray is fixed on the turntable and only the rack moves. During movement, the moving frame is moved in a predetermined direction on the chassis via a pinion gear, and the movement of the moving frame is converted into lifting and lowering movements of the receiving plate and the clamper using a catch plate lifting and lowering mechanism and a clamper lifting mechanism to perform clamping operation and clamp release. Since the rack is driven by a single drive unit, both the tray conveyance and clamping operations can be carried out, which reduces the number of parts in the drive unit by half and requires special operation switching control. is unnecessary, making the device configuration simple and inexpensive.

In addition, since the switching between tray conveyance and clamping operation is performed mechanically, the switching operation can be performed reliably at the predetermined timing.Furthermore, since the switching operation is performed continuously, there is no possibility of temporary stoppage of the drive mechanism. There is little abnormal noise during operation.

In addition, the central rear part of the clamper arm is rotatably supported, and a tension spring is stretched over the rear end of the clamper arm, and the tension force of the tension spring, the weight of the clamper arm and clamper, and the attraction force of the magnet are used. The clamper arm is always urged downward, and a tension spring is stretched around the slide plate that moves up and down the receiving plate, so that the receiving plate is always urged upward by this tensile force. When the moving frame receives a pressing force from the clamp arm, the slide plate is urged, and when the clamp is released, the clamp arm is urged while receiving a pressing force from the slide plate, so that it acts on the moving frame. External forces cancel each other out, and clamping and releasing operations can be performed with a small driving force.

In addition, the clamper arm, which rotatably supports the clamper, and the slide plate, which supports the receiving plate so that it can move up and down, are moved together by moving the moving frame, so the time required for clamping is shortened. The operation timing of the clamper and the receiving plate can be set by the mechanical configuration of the operation conversion mechanism provided on the clamper arm and the slide plate, and the optimum operation timing can be obtained without the need for special control.

Furthermore, since the sliding movement of the movable frame is converted into the lifting and lowering movement of the clamper and the receiving plate using the cam mechanism, constant and accurate movement can be performed at all times. In addition, the downward rotation range of the clamper arm is limited by the adjustment screw, so
The lowering position of the clamper arm can be easily adjusted when assembling the disk clamp mechanism.

In the above embodiment, the clamper arm provided at the tip of the clamper arm is raised and lowered by rotating the clamper arm, but the clamper arm may be configured to be raised and lowered, or the movable frame is rotated and moved. , this rotational movement may be converted into a lifting/lowering movement of the clamper and the receiving plate.

[Effects of the invention] As explained above, in the disk loading device according to the invention, the rack is slidably equipped on the tray, and the switching lever provided on the tray is switched between the rack side and the chassis side according to the movement of the rack. When the switching lever engages with the rack, the rack and tray are moved together to transport the tray, and when the switching lever engages with the chassis side, the rack is fixed on the tray and turntable and only the rack moves. The movement of the rack when the tray is fixed moves the movable frame in a predetermined direction on the chassis via the pinion gear, and the movement of the movable frame is controlled by the catch plate lifting mechanism and the clamper lifting mechanism. Since the clamping and unclamping operations are performed by converting it into a lifting operation,
By driving the rack with a single drive device, tray conveyance and clamping operations can be performed at the same time, which reduces the number of drive device parts by half and eliminates the need for special operation switching control, making the device configuration simple and inexpensive. . In addition, since the switching between tray conveyance and clamping operation is performed mechanically, the switching operation can be performed reliably at the predetermined timing.Furthermore, since the switching operation is performed continuously, there is no possibility of temporary stoppage of the drive mechanism. The operating noise is small.

[Brief explanation of drawings]

Fig. 1 is a side view, partially omitted, showing the state in which the tray of the disc loading device according to the present invention is housed on a turntable, Fig. 2 is an external perspective view of the disc loading device, and Fig. 3 is A partially omitted side view showing the state in which the tray is fed forward, Fig. 4 is a partially omitted side view showing the state in which the clamper presses the disk, and Fig. 5 is a side view showing the vicinity of the movable rack plate provided on the tray. FIG. 6 is a cross-sectional view taken along the - line in FIG. 5,
Figures 7 and 8 are explanatory diagrams of the operation of the switching lever;
The figure is a cross-sectional view taken along the - line in FIG. 7, and FIG. 10 is a conceptual diagram of the operation of the switching lever corresponding to FIG. 3.
11 is a conceptual diagram of the operation of the switching lever corresponding to FIG. 1, and FIG. 12 is a conceptual diagram of the operation of the switching lever corresponding to FIG. 4. 10...Main chassis, 12...Tray, 2
2...disc, 26...turntable, 32
...Socket plate, 34...Socket plate elevating mechanism, 64...
Moving frame, 70... Clamper, 78... Clamper arm, 94... Plate cam, 112... Pinion gear, 132... Drive mechanism, 138... Movable rack plate, 154... Lower rack, 156... Upper part Rack, 160...Switching lever, 170...Hook side engagement guide part, 176...Chassis side engagement guide part.

Claims (1)

[Scope of utility model registration request] A tray that is slidably installed on the chassis and transports the disk so that it can be taken in and out of the turntable, a disk receiving plate that is installed on the tray so that it can be raised and lowered and that places the disk on the turntable, and A disk loading device includes a clamper that is movable up and down and clamps the disk; When the tray is rotatably fixed and the other end is engaged with the rack via the rack-side engagement guide part, the drive force from the drive device is transmitted to move the tray horizontally; In addition, when the other end is engaged with the chassis via the chassis-side engagement guide section, the movement conversion mechanism converts the horizontal biasing force received from the movement of the rack into vertical motion. A disk loading device comprising an engaging member for transmitting a driving force from the driving device so as to move the disk receiving plate in a vertical direction.