JPH07141742A - Disk device - Google Patents

Abstract

PURPOSE:To reduce a space for such devices as a clamping mechanism or the like, to prevent the generation of unnecessary noises at the time of the nonclamping of a clamping member and to prolong its life service by an elastic part provided on the first part of the clamping member and a pressing part provided on its second part. CONSTITUTION:A unit plate 75 is attached by dumpers 67, 68, 69 and 70 fitted and connected to a dumper holder fixed on a chassis so as to be insulated from the vibration of the chassis. A clamper 80 supported by shaft parts 77 and 78 and placed opposed to a turntable 59 and an arm part 81 for holding it are provided on the rear part of the unit plate 75. A clamper holder 82 including a plate spring is loaded being constituted so as to raise the clamper 80 by the arm part 81 when the device is brought into contact with the inner surface of the chassis 8' and displacement is given so as to move the clamping member away from a disk mounting surface. Further, a pressing part 90 for displacing the clamping member in a direction where the disk pressing surface is made roughly in parallel with the mounting surface by a force roughly opposed to a restoring force is provided.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc device such as a compact disc or a video disc, and more particularly to a disc clamp for saving space, reducing vibration and noise. Regarding the configuration of the mechanism. 2. Description of the Related Art A conventional device of this type is described in Nikkei Mechanical (1985-4-8). However, in the conventional method, the space saving of the clamper portion (clamping member) and the reduction of the unnecessary noise due to the vibration when the clamper is lifted (when the clamper is not clamped) are taken into consideration. There wasn't. It is an object of the present invention to provide a mechanism that eliminates the drawbacks of the prior art and saves space. According to the present invention, in a disc device in which a disc is clamped by a clamp mechanism to a rotary drive unit, the clamp mechanism is provided at least in a non-clamped state with a first clamp member (clamper portion). 1
Elastic portion that moves the clamp member away from the mounting surface by a restoring force (see reference numeral 8 in one embodiment).
1, 82) and the second portion of the clamp member, and displaces the clamp member in a direction in which the disc pressing surface is substantially parallel to the mounting surface by a force in a direction substantially opposite to the restoring force. (One embodiment reference numeral 90) and a holding member (one embodiment reference numerals 81, 82, 90). When not clamped, the holding member displaces the clamp member away from the disk mounting surface by the restoring force of the elastic portion, and the pressing member pushes the clamp member so that the disk pressing surface is substantially flush with the mounting surface. Displace in parallel direction. As a result, the space for inserting the disk is secured, and at the same time, the increase in the height of the device is suppressed and the vibration of the clamp mechanism is suppressed. An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a view showing a main part of the present invention, and FIG. 2 is an external view of a recording disk mounting apparatus to which the present invention is applied, in which a front panel 2 is provided on a front part of a case 1, an eject button 3, A play button 4, other operation buttons 5 and an operation display tube 6 are attached, and a disc insertion hole 7 having a substantially inclined surface is formed in the panel portion. The mechanism shown in FIGS. 1 and 3 to 14 is mounted in the case 1 described above. The structure of the mechanism will be described with reference to FIGS. 1 and 3 to 14. Here, objects having the same reference numerals are the same parts. A door 9 pivotally supported on the chassis 8
Are arranged close to each other so as to close the disc insertion hole 7. Pin 11 of door link 10 pivotally supported by chassis 8
The part is slidably engaged with the right end of the door 9, and the door link pin 12 is fitted to the movable piece 14 of the blanker 13 mounted on the chassis 8 and is slidably mounted in the front-rear direction of the chassis 8. And is inserted into a clutch slider 16 which is biased forward by a spring 15. Further, the door link 10 is biased by the close spring 17 in the direction in which the door 9 is closed. Clutch slider 1
One end of 6 is a clutch link 3 pivotally supported by the chassis 8.
0 is inserted in the pin 31 and the clutch slider 16
The clutch link 30 is rotated by sliding before and after.
On the other hand, the pin 29 at the other end of the clutch link 30 is the chassis 8
Attached to the rear portion of the right slide arm 24 that is slidable in the front-rear direction, has a slot 25 and a slot-like recess 26, and is biased rearward by a spring 28.
7 is inserted in the recess 26. The drive gear 23 is
Power is transmitted from a motor gear 20 attached to a motor 19 fixed to the chassis 8 through a reduction gear 21 and a worm gear 22, and the rack 27 receives a clutch link 30.
Is arranged so that it can be meshed with and separated from the drive gear 23. Further, the rack stopper 32 is fixed to the chassis 8, the rack 27 is engaged with the drive gear 23, and the right slide arm 24 is positioned so as to prevent the rack 27 from escaping downward when starting to move forward. When the rear end of the rack 27 is completely moved backward, the front end portion 33 of the rack 27 is lowered and the drive gear 2
It is arranged at a position where it does not come into contact with the rack 27 when disengaged from 3. The front end portion 34 of the right slide arm 24 is also
Is oblique, is pivotally supported by the chassis 8, is attached so as to be rotatable in the vertical direction, and is arranged at a position that prevents the door 9 from rotating inward when it is rotated downward. Is arranged so as to be fitted to the right end bent portion 36 of the above, abut on the lower surface of the stopper link 37 pivotally supported by the chassis 8, and push up the stopper link 37 and lower the door stopper 35 when the right slide arm 24 moves forward. Has been done. The spring 38 constantly urges the stopper link 37 downward. Further, the right slide arm 24 is provided with a longitudinal elongated hole 39, and a rotating plate 41 having a pin 40 fitted into the elongated hole 39 is connected to a rotating shaft 42 whose both ends are pivotally supported by the chassis 8. A rotating plate 44 having a pin 43 is screwed to the left end. Further, a left slide arm 46 having a long hole 45 which fits into the pin 43 is attached to the chassis 8 so as to be slidable in the front-rear direction, and is arranged so as to slide in the same direction as the right slide arm 24. The left slide arm 46 is provided with an end portion 48 arranged to push the up switch 47 when the slide arm 46 has moved to the rear and an end portion 50 that pushes the chuck switch 49 when it has moved to the front.
Into the L-shaped elongated hole 51, a pin 53 of a lift lever 52 pivotally supported on the side surface of the chassis 8 is fitted. Similarly, the right slide arm 24 is also fitted with the pin 55 of the lifting lever 54 pivotally supported on the side surface of the chassis 8 to lift the lifting lever 52.
And 54 are provided with arcuate portions 56 and 57, respectively. Further, a disc motor 61 having a turntable 59 for supporting and rotating the disc 58 and a taper ring 60 for positioning the disc slidably attached to the turntable 59 in the vertical direction is held at the tip.
A reading pickup unit 62 and the pickup unit 62
Is attached to a damper holder 63, 64, 65, 66 fixed to the chassis 8, and a damper 67, 68, which is fitted and adhered to the chassis 8. A unit plate 75 having pins 71, 72, 73 and 74 is attached so as to be vibrationally insulated from the chassis 8 by 69 and 70. Further, the dampers 67, 68 are arranged so that the intersection 76 of the line connecting the centers of the dampers 67, 69 and the line connecting the centers of 68, 70 is located substantially on the line connecting the centers of the turntable 59 and the reading pickup 62. , 69, 70 are properly arranged, and are supported by shafts 77 and 78 at the rear of the unit plate 75 supported by the chassis 8 so that the vibration of the chassis 8 is not easily transmitted to the unit plate 75. Magnet 7 arranged facing table 59
Clamper 80 with 9 and arm 8 holding it
1, when the inner surface 8'of the chassis 8 is abutted, the arm 81
Mounts a clamper holder 82 composed of a leaf spring configured to push up the clamper 80, and further, the disk 58
Links 85, 86 whose one end is rotatably supported by the unit plate 75, and which is rotatably supported by the front end of the pressing roller 84 for pressing the transfer roller 83 axially supported by the chassis 8 at the time of transfer.
Engagement pins 91 and 92 fixed to both side surfaces of a clamper arm 90 that pivotally supports shaft portions 88 and 89 of a disk holder 87 pivotally supported by It is provided so as to project from the hole portions 93 and 94 of No. 8. The unit plate 75 is hung on the chassis 8 by springs 95, and the vertical regulating pins 96, 97, 98 of the unit plate 75 are scissored on both side surfaces when the clamper arm 90 is raised. When the slide arms 24 and 46 of the left slide arm 24 are moved forward, the lower surface portion 99 of the right slide arm 24 and the lower surface portion 10 of the left slide arm 46 are respectively
It comes into contact with 0 and 101. Further, when the disc is moved up and down, a holder 103 'is mounted, which has a positioning lever 103 having a positioning pin 102 arranged so as to be slightly separated from the outer diameter of the disc to prevent the disc from being displaced in the forward direction. ing. Further, the positioning lever 103 is a push cam 1 pivotally supported by the chassis 8.
The cam surface 10 of the push cam 104 placed under 04.
Reference numeral 5 is fitted into a pin 46 of the left slide arm 46 and is restricted in rotation. Also, the disk receiver 87 has two springs 1.
The unit plate 75 is always urged by 06. Further, a long hole 108 is provided so as to be rotatable in a certain angle range with respect to the convex portion 107 of the drive gear, and a large pulley 111 attached by an E ring 110 to a shaft 109 for rotationally coupling therewith, and a transfer. A belt 113 is hung between the small pulleys 112 that rotate the rollers 83 by friction transmission. The transfer roller 83 and the pressure roller 84 are made of rubber or the like so that friction is transmitted between the core shafts 114 and 115 to prevent scratches when the disc is fixed. Pins 116 and 117 are mounted on the unit plate 75 at positions concentric with the center of the turntable 59 and slightly larger than the disk outer diameter.
Further, the chassis 8 is also provided with an optoelectronic sensor 118 that detects the presence or absence of light blocking immediately below at a similar distance. Further, a sensor 119 for detecting when the disc is almost half inserted from the door 9 is provided, and the sensor 1 for detecting the position of the door link 10 is also provided at the end 120 of the door link.
21 is provided, and the sensor 118 and the UP switch 4 described above are provided.
7 and the chuck switch 49 are connected to a signal determination circuit (not shown) composed of a microcomputer. Further, the disc motor 61, the drive motor 19, the pickup 6
2, the plunger 13 is connected to a drive circuit (not shown), the eject button 3, the play button 4, and the other button 5 are connected to a signal determination circuit, and the display tube is connected to a display circuit (not shown). The operation is controlled by (not shown). Next, the operation will be described. Disk 58
When playing the, the door link end 120 turns on the sensor 121 when the door 9 is pushed by the disc in the state of FIG. As a result, the plunger 13 is sucked by the control circuit, and at the same time when the door 9 is opened, the drive motor 19 starts rotating,
The drive gear 23 and the large pulley 111 rotate counterclockwise, and the transfer roller 8 is rotated by the belt 113 and the small pulley 112.
3 is rotated in the disc pull-in direction. At this time, the rack 27 is disengaged from the drive gear 23 by the plunger 13, the clutch slider 16, and the clutch link 30 (state in FIG. 8). Subsequently, when the disk 58 is pulled in and the sensor 118 is no longer shielded from light, the drive motor 19 is stopped and the plunger 13 is turned off. This makes spring 1
Door 9 is closed by the force of 7. And the rack 27 is spring 1.
The clutch link 30 is rotated and raised by the force of 5 and meshes with the drive gear 23 (state in FIG. 9). Then, the drive motor 19 is rotated in the reverse direction by the control circuit (all of the circuits described above).
Rotates clockwise. At this time, even if the drive gear 23 of the large pulley 111 is reversed, the rotation angle range of the elongated hole 108 does not push the convex portion 107, so that power is not transmitted and the large pulley does not rotate. Therefore, the transfer roller 83 does not rotate. The rack 27 moves forward and moves to a position where it goes over the rack stopper 32. After that, the slot 25 pushes the right slide arm 24. As a result, the right slide arm 24 starts to move forward, and the rotating plate 41 also rotates, so that the left slide arm 46 also moves forward simultaneously. Subsequently, the push cam 104 rises and the positioning lever 103 rises (state of FIG. 9). Since the raising levers 52 and 54 rotate, the clamp arm 90 descends and the disc receiver 87 also moves to the spring 1.
It is lowered by the force of 06. At the same time, since the pressure roller 84 descends, the disc 58 descends, and the disc 58 descends in a state in which it is substantially positioned by the front-side positioning pin 102 and the side wall of the disc receiver 87 in the left-right direction, and in the rear direction by the pins 116 and 117, and the turntable. It is put on 59. At this time, the front end portion 34 of the right slide arm pushes up the stopper link 37, lowers the door stopper 35, and locks the door 9 from opening. At the same time, the clamper 80 presses the disk 58, and the lower surface portions 9 of the left and right slide arms 24 and 46 are
Since the units 9, 100, 101 are separated from the pins 98, 97, 96, the unit plate 75 is released from the fixed state and becomes free. Then, the end 50 of the left slide arm 46 pushes the chuck switch 49 (FIG. 11), so that the drive motor 1
9 stops, the disk mounting is completed, and then the turntable 60 and the pickup 62 are put into operation by the control circuit and the performance is started (state of FIG. 11). Next, the time when the playing is stopped and the disk 58 is taken out will be described. When the eject button 3 is pressed, the turntable 60 is stopped by the control circuit and the drive motor 19
Rotates to rotate the drive gear 23 counterclockwise. The rack 27 starts moving backward, and the left and right slide arms 2
4,46 start moving backwards. Next, the bottom surface 9
9,100,101 contacts pins 98,97,96,
The unit plate 75 is fixed so as not to move upward. Further, the raising levers 52 and 54 are arranged on the left and right slide arms 2.
When rotating with the movement of 4, 46, the clamp arm 9
0 is pushed up, and the clamper 80 separates from the disc 58. At the same time, the door stopper 35 is raised by the force of the spring 38. Subsequently, the disk receiver 87 moves up the clamp arm 90, the tip of the clamper holder 82 contacts the chassis 8, the clamper 80 is lifted, the disk 58 is lifted from the turntable 60, and the pressure roller 84 transfers the disk 58 by the spring 106. Press on the roller (state of FIG. 13). Subsequently, the push cam 104 is pushed down by the left slide arm 46, and the positioning lever 103
Lower. Further, the rack 27 moves rearward to a position apart from the rack holder 32. The rear end portion 48 pushes the up switch 47. The drive circuit 19 is stopped by the control circuit, and the plunger 13 is simultaneously turned on. This causes the door 9 to open and the clutch slider 16 to move the springs 15 and 1
7, the clutch link 30 is rotated, the rack 27 is rotated downward, and the drive gear 23 disconnects. Subsequently, the drive motor 19 reversely rotates, and the drive gear 2
3 rotates clockwise, the large pulley 111, the belt 11
3, the transfer roller 83 rotates in the disc ejection direction via the small pulley 112 to eject the disc 58. When the disk 58 passes the sensor 119, the control circuit stops the drive motor 19. At this time, the plunger 13 is turned off and the door is closed. In this embodiment, the plunger 13 is used at this time.
However, it is obvious that it is easy to configure so that the plunger 13 is kept on and the plunger 13 is turned off when the disk is separated from the sensor 118, and the door is closed. This will prevent the door from hitting the disc when ejecting. According to the present invention, it is possible to save space in a device such as a clamp mechanism, prevent generation of unnecessary noise when the clamp member is not clamped, and prolong the life of the device. it can.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an essential part of the present invention. FIG. 2 is an external view of the device mechanism of one embodiment of the present invention. FIG. 3 is a perspective view of an internal mechanism of FIG. 4 is a left side perspective view of FIG. 3. FIG. FIG. 5 is a plan view of FIG. 6 is a view taken along the line AA of FIG. FIG. 7 is a left side view of FIG. FIG. 8 is a right side view during the operation of FIG. 9 is a right side view during the operation of FIG. FIG. 10 is a left side view during the operation of FIG. FIG. 11 is a left side view during the operation of FIG. FIG. 12 is a view taken along the line BB of FIG. 13 is a timing diagram of the operation of FIG. 12; FIG. 14 is an exploded perspective view of the vibration insulating portion of FIG. [Explanation of Codes] 8 ... Chassis, 80 ... Clamper, 81 ... Arm part, 82 ... Clamper holder, 90 ... Clamper arm.

Claims (1)

[Claims] 1. In a disc device in which a disc is clamped to a rotation drive unit by a clamp mechanism, the clamp mechanism includes a clamp member that abuts on the disc and clamps the disc on a disc mounting surface of the rotation drive unit; An elastic portion that abuts on the first portion of the clamp member to displace the clamp member away from the mounting surface by a restoring force, and a force that abuts the second portion of the clamp member in a direction substantially opposite to the restoring force. A disc device, comprising: a holding member having a pressing portion that displaces the clamp member in a direction in which the disc pressing surface is substantially parallel to the mounting surface.