JPH103731A - Recording and reproducing device for information recording disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize swinging movement of an arm and to prevent swing of the tip side of the arm at the recording and reproducing time. SOLUTION: The arm 43 is provided swingably on an arm axis 41 as a fulcrum positioned in a side part of a tray, and the tip side of the arm 43 is movable back and forth to the tray. A link engagement part 44, a turntable and a driving part 47 are provided on the tip side of the arm 43, while a head part is provided for recording and reproducing an information recording disk. A link 45 is provided on a link axis 42 as a fulcrum positioned in a side part of the tray so as to be swinged in accordance with the swinging of the arm 43. The link 45 is provided with a guide groove 46 to be movably engaged with the link engagement part 44 on the tip side of the arm 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for an information recording disk in which an information recording / reproducing arm swings with respect to the position of the information recording disk.

[0002]

2. Description of the Related Art Conventionally, for example, there is a compact disc (hereinafter referred to as a CD) as an information recording disc, and a plurality of CDs are used as a CD player for reproducing this CD.
There is a CD changer which selectively reproduces a CD from among these.

In this CD changer, Japanese Patent Laid-Open Publication No.
As described in Japanese Patent No. 9168, there is a changer device using a tray that can move a plurality of holders each of which detachably supports a CD in a disk stacking direction substantially perpendicular to the disk surface. In this changer device,
An arm whose base end is supported so as to be swingable, that is, movable back and forth in the tray direction, with an arm shaft erected at the side position of the tray as a fulcrum.
A turntable for chucking D and a drive unit for rotating the turntable are provided, and a head unit for playing back a CD is provided movably along the arm.

When playing back a CD, the tray is opened and an arbitrary holder is moved up and down to form an arm entry space below the CD to be played back, and the playback arm is swung in the tray direction. The CD is reproduced in the tray by entering the arm entry space below the CD to be reproduced.

[0005]

However, in the prior art, since the arm is supported so as to be able to swing in a cantilever state, the arm easily swings when the arm swings.
There is a problem that the swinging movement is likely to be unstable. Moreover,
During playback, the tip side of the arm easily swings up and down, and the CD
Playback becomes unstable.

The present invention has been made in view of the above points, and provides a recording / reproducing apparatus for an information recording disk which can stabilize the swinging movement of an arm and can prevent the end of the arm from swinging during recording and reproduction. The purpose is to do.

[0007]

According to a first aspect of the present invention, there is provided an information recording / reproducing apparatus for recording / reproducing an information recording disk, comprising: a tray for detachably supporting the information recording disk; And a drive unit for rotating the turntable, and a head unit for recording / reproducing on / from the information recording disk, and swinging around an arm axis located at a side of the tray as a fulcrum. The arm has a guide groove on which a link engaging portion on the distal end side of the arm is movably engaged with an arm whose distal end is moved forward and backward with respect to the tray, and the arm is supported by a link shaft positioned on a side of the tray. And a link that swings in accordance with the swing.

When the arm swings with respect to the tray, the link engaging portion on the distal end of the arm is guided by the guide groove of the link that swings following the arm. The swing of the arm is stabilized. Moreover, at the time of recording / reproducing when the distal end of the arm enters the tray and moves, the distal end of the arm is supported by the link, so that the swing of the distal end of the arm is prevented and the recording / reproducing of the information recording disk is stabilized.

The information recording disk has a read-only,
Includes both recording-only, recording and reproduction, and includes, for example, compact disks (including music CDs and CDROMs), video disks, recordable and reproducible magneto-optical disks, and flexible magnetic disks.

The recording / reproducing apparatus includes reproduction-only, recording-only, and both recording and reproduction. Similarly, the head section includes reproduction-only, recording-only, and recording and reproduction. .

According to a second aspect of the present invention, there is provided an information recording / reproducing apparatus for recording / reproducing an information recording disk, comprising a plurality of holders for detachably supporting the information recording disk. A tray that moves and forms an arm entry space facing the surface of the information recording disk on which recording and reproduction is performed, a link engaging portion on the tip end side, a turntable that engages the information recording disk, and a drive that rotates the turntable And a head for recording and reproducing information on the information recording disk. The recording head is moved in the disk stacking direction corresponding to the position of the information recording disk surface on which the information is recorded and reproduced, and is positioned on the side of the tray. Arm that swings about the arm axis to be supported and the tip side advances and retreats with respect to the arm entry space, and a link on the tip side of this arm. An engagement portion having a guide groove movably engaged, and a link swinging in accordance with the swing of the arm with a link shaft located on a side of the tray as a fulcrum. It is.

When the arm swings with respect to the arm entry space of the tray, the link engaging portion on the distal end side of the arm is guided by the guide groove of the link that swings following the arm. The swing of the tip side of the arm is prevented, and the swinging movement of the arm is stabilized. In addition, when recording / reproducing when the tip of the arm has moved into the arm entry space of the tray, the arm tip is supported by the link, so that the swing of the tip of the arm is prevented and the recording / reproduction of the information recording disk is stable. I do.

According to a third aspect of the present invention, in the information recording / reproducing apparatus for an information recording disk, when the arm swings to a predetermined recording / reproducing position, the link of the arm is linked. The joint is restricted from contacting the end of the guide groove of the link, and the arm is positioned at a predetermined recording / reproducing position.

According to a fourth aspect of the present invention, there is provided an information recording disk recording / reproducing apparatus according to any one of the first to third aspects, wherein the arm and the link are connected at a position where the arm is retracted out of the tray. The arm axis and the link axis are positioned opposite to each other while being superimposed, and are configured to be small.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a recording / reproducing apparatus for an information recording disk according to the present invention.

In this embodiment, a compact disc for reproduction only (hereinafter referred to as CD) is used as an information recording disc.
The following describes a CD changer that is a CD player that handles, and selectively reproduces one CD from a plurality of CDs.

As shown in FIGS. 11 and 12, the CD changer has a body 1, and a portable CD changer which can be carried around by covering the outside of the body 1 with a case or the like. Is incorporated in the audio equipment to form a stationary CD changer.

The fuselage 1 has a bottom plate 2 having a substantially square shape. Side plates 3 are erected from both sides of the bottom plate 2, and an upper surface plate 4 is bridged between upper front ends of the both side plates 3. A standby space 5 in which an arm 43 described later stands by is formed below the upper surface plate 4, and a tray loading section 6 that opens upward is formed behind the standby space 5. As a fulcrum, a tray 7 is provided to be openable and closable between a position where the tray 7 is loaded in the tray loading section 6 and an open position.

As shown in FIGS. 9 and 10, the tray 7 includes one upper holder 8a and two upper and lower intermediate holders 8b and 8c. Three CDs in the stacking direction of the disk almost perpendicular to the CD surface
Can be stacked and stored. The rear ends of both sides of each of the holders 8a to 8c are supported by a pair of holder supporting members 9, and a support shaft 9a protruding from the lower end side surface of each of the holder supporting members 9 is fixed to a bottom plate 2 of the body 1 by screwing. 11 (shown in FIG. 11), the upper end of each holder supporting member 9 is fixed to the lower surface of the holder 8a.

The upper holder 8a has a holder plate 11a,
Pin mounting plates 12a are mounted on both sides of the holder plate 11a, and selection pins 13a are provided on each of the pin mounting plates 12a so as to project in the axial direction to the side. The rear ends of both sides of the holder plate 11a are directly fixed to the holder support member 9.

Each of the intermediate and lower holders 8b, 8c has holder plates 11b, 11c, and pin mounting plates 12b, 12c are mounted on both sides of the holder plates 11b, 11c, respectively. 12c has selection pin 13b
, 13c. Selection pins 13b, 13c on both sides
The front ends of the link members 14b and 14c are rotatably connected to the respective members, and the rear ends of the link members 14b and 14c are rotatably supported on the holder support member 9 by locking pins 15b and 15c. The link members 14b, 14c on both sides are attached to both ends of connecting plates 16b, 16c located behind the holder plates 11b, 11c, and the link members 14b, 14c on both sides are integrated by the connecting plates 16b, 16c. I have. Therefore, the holder plates 11b, 11c are rotatably supported by the link members 14b, 14c with the selection pins 13b, 13c as fulcrums. Note that in FIG. 9 and FIG.
Rotation of the holder plates 11b, 11c in the clockwise direction about the fulcrums b, 13c is performed by connecting the holder plates 11b, 11c to the connection plates 16b, 16c.
The position is regulated by a stopper (not shown) at a position parallel to.

Further, projecting plate portions 17b, 17c projecting upward and forward are formed on the pin mounting plates 12b, 12c, and the projecting plate portions 17b, 17c are formed with guide pins 18b,
18c is protruding.

Further, holder holes 19a to 19c are formed in the center of each of the holder plates 11a to 11c, and the holder holes 19a to 19c are formed.
Rotating bodies 20 for detachably supporting the center hole of the CD are arranged inside the rotator. Each of the rotating bodies 20 is supported by the supporting body 21 on the edge of the holder holes 19a to 19c.

The rotating body 20 is made of a synthetic resin and is formed in a disk shape.
Are formed, and a plurality of locking claws 24 are formed in the grooves 23 between the plurality of engaging projections 22 so that the center hole of the CD is detachably engaged. The center of the rotating body 20 is rotatably supported on the support 21 by a rotating shaft 25.
Further, an engagement protrusion is provided around the rotation shaft 25 on the lower surface of the rotating body 20.
An annular metal plate 26 (shown in FIG. 2), which constitutes a part of a magnet means 55 to be described later, is mounted inside the 22.

The support 21 is made of a leaf spring having elasticity, and a rotation shaft 25 is rotatably mounted at a center portion thereof. Three support pieces 27 are formed radially from the center portion. Are attached to the edges of the holder holes 19a to 19c by locking pins 28. At the tip of each support piece 27, a mounting hole 29 (shown in FIG. 2) through which the locking pin 28 is inserted is formed in a radially long hole shape. Therefore, the rotating body 20 is rotatable by the support 21. Support and CD
It is movably supported in the axial direction (disc laminating direction) perpendicular to the surface.

On the lower surface side of each of the holder plates 11a to 11c, a holding plate 30a which is located closer to the rear side of the holder plates 11a to 11c and holds a CD with respect to each of the holder plates 11a to 11c.
~ 30c are installed to be openable and closable. On both sides of the upper surface of each of the holding plates 30a to 30c, an engaging member 31 made of a synthetic resin which is engaged with an edge of the CD is attached, and a rear end portion 32 of the engaging member 31 is attached to the holder plates 11a to 11c. Axle 33 attached near the rear part on both sides of the lower surface of the lower surface of the shaft with the axial direction facing sideways
It is rotatably supported on the shaft. A torsion coil spring 34 is mounted on each support shaft 33, and is biased by the torsion coil spring 34 toward each of the holder plates 11a to 11c on which the holding plates 30a to 30c are supported. Therefore, each holding plate 30a
30c can be opened and closed by swinging the support shaft 33 as a fulcrum with respect to each of the holder plates 11a to 11c.

An operation receiving portion 35 is formed at the front end on both sides of each of the holding plates 30a to 30c.
A notch 36 is formed so that a central portion of D is exposed, and an arm to be described later is formed from near both sides of the notch 36.
A pair of abutting pieces 37 abutting on 43 are formed to protrude.

As shown in FIGS. 9 and 11, the tray 7 holds the upper holder 8a when the CD is loaded.
By turning to open upward with respect to
Each of the holders 8a to 8c is opened in a fan shape. In this state, the holder plates 11a to 11c of the holders 8a to 8c are removed from the holding plates 30a to 30c.
Can be detached from the rotating body 20 of each of the holder plates 11a to 11c. Also CD
After the mounting, the upper holder 8a is attached to the tray loading section 6 of the machine body 1.
The holders 8a to 8c
Are stacked in the disk stacking direction and loaded on the upper side of the tray loading section 6 of the machine body 1. When a CD is reproduced, for example, as shown in FIGS. 7 and 10, the selection pin 13c of the holder 8c below the CD to be reproduced is moved downward, and the holder 8c and the CD are moved substantially horizontally to the tray loading unit 6.
And an arm entry space A is formed below the CD to be reproduced.

The body 1 is located at the front edge of the upper holder 8a.
A locking piece 38 that engages with the upper surface plate 4 when closed is formed to protrude, and an operation piece 39 for opening and closing is formed to protrude on the left side.

As shown in FIG. 5, the bottom plate 2 on the front side of the fuselage 1
An arm shaft 41 is vertically mounted near the right end, and a link shaft 42 is vertically mounted near the left end, between the and the upper plate 4.

A base end of an arm 43 is rotatably supported on the arm shaft 41 so as to be rotatable and slidable in the vertical direction (disc stacking direction). The arm 43 can swing between a standby position in front of the tray 7 shown in FIG. 5 and a reproduction position which has entered the tray 7 shown in FIG. 1, and has a pin-like link A joint portion 44 is protruded.

A base end of a link 45 is rotatably supported on the link shaft 42 so as to be slidable in the vertical direction (disc stacking direction). The link 45 is formed with a guide groove 46 with which the link engaging portion 44 of the arm 43 is movably engaged.

When the arm 43 swings, the arm 43
When the arm 43 pivots to the standby position, as shown in FIG. 5, the link 45 is overlapped and positioned below the arm 43, as shown in FIG. When the arm 43 rotates to the playback position, the link 45
Is advanced into the tray 7. Therefore, when the arm 43 swings with respect to the tray 7, the link engaging portion 44 on the distal end side of the arm 43 is guided by the guide groove 46 of the link 45 swinging following the arm 43. The swing of the distal end side of the arm 43 can be prevented, and the swing movement of the arm 43 can be stabilized. Moreover, the tip of the arm 43 is the tray 7
When recording / reproducing, the arm 43 is supported by the link 45 at the time of recording / reproducing, the swing of the distal end of the arm 43 can be prevented, and the recording / reproducing of the CD can be stabilized.
Further, when the arm 43 swings to the reproduction position, the link engaging portion 44 of the arm 43 is restricted from contacting the end of the guide groove 46 of the link 45, so that the arm 43 can be positioned at the reproduction position.

As shown in FIGS. 1 and 2, a motor 47 as a drive unit is provided at the distal end of the arm 43. A drive shaft 48 protrudes from an upper surface of the motor 47, and a motor case 49 is attached so as to cover an upper side of the motor 47. An annular flange portion 50 is formed around the motor case 49.

As shown in FIG. 2, a turntable 51 which engages with the rotating body 20 and chucks a CD with the rotating body 20 is fixed to the drive shaft 48 of the motor 47. The turntable 51 is made of a synthetic resin and is formed in a disk shape having substantially the same shape as the rotating body 20, and a holding portion 52 for holding the edge of the center hole of the CD between the rotating body 20 and the outer periphery of the upper surface is formed. A plurality of projections 53 that engage with the groove 23 of the rotating body 20 are formed on the center side.

An annular permanent magnet 54 is mounted around the drive shaft 48 of the turntable 51 and inside the projection 53. The permanent magnet 54 and the metal plate 26 of the rotating body 20 constitute magnet means 55 for holding the rotating body 20 and the turntable 51 in an engaged state by the attractive magnetic force. Then, as shown in FIG. 2, when the arm 43 moves to the reproduction position and the turntable 51 enters below the rotating body 20, the metal plate 26 of the rotating body 20 is attracted by the attractive magnetic force of the permanent magnet 54 and is supported. Body 21
The rotating body 20 and the CD are lowered via the rotating body 20, and the rotating body 20 and the turntable 51 are engaged. At this time, when the position of the groove 23 of the rotating body 20 matches the position of the protrusion 53 of the turntable 51, the groove 23 and the protrusion 53 are engaged. When the is rotated, the positions match and the groove 23 and the projection 53 are engaged.

As shown in FIG. 5, a laser pickup 56 as a head is provided on the arm 43 so as to be movable along the arm 43. This laser pickup 56
Is sent along the arm 43 by a pickup moving mechanism (not shown) constituted by, for example, a general feed mechanism.

As shown in FIGS. 5 to 7, a disc selecting cam 61 is provided inside the rear portion of the both side plates 3 of the body 1.
Are formed in the guide grooves 62 formed in the side plate 3 (see FIGS. 11 and 12).
) Are slidably mounted in the front-rear direction. On the inner surface (the surface opposite to the surface attached to the side plate 3) of the disc selecting cam 61, an introduction groove 63 which opens upward is formed on the rear side, and three cam grooves 64a to 64c are formed from the introduction groove 63. Are formed forward. Each of the cam grooves 64a to 64c includes an upper horizontal groove 65 formed horizontally from the introduction groove 63 toward the front, and the upper horizontal groove 65.
And a lower horizontal groove 67 formed horizontally from the lower end of the inclined groove 66 toward the front.

When the tray 7 is closed by the body 1, the selection pins 13a to 13c of the holders 8a to 8c enter the introduction groove 63. The upper horizontal groove 65 of each of the cam grooves 64a to 64c opening into the introduction groove 63 is provided with each of the selection pins 13a to 13 that have entered the introduction groove 63.
c, the upper horizontal groove of each of the cam grooves 64a to 64c when the disc selecting cam 61 slides rearward.
Each of the selection pins 13a to 13c can enter at 65. Then, as the disc selection cam 61 slides backward, first, the selection pin 13c of the lower holder 8c is moved to the cam groove 64c.
Through the upper horizontal groove 65 and the inclined groove 66 of the lower horizontal groove
67, and then the selection pin 13b of the intermediate holder 8b descends to the lower horizontal groove 67 via the upper horizontal groove 65 and the inclined groove 66 of the cam groove 64b, and then the selection pin 13b of the upper holder 8a. 13a is engaged with the upper horizontal groove 65 of the cam groove 64a.

That is, the selection pin 13a of each of the holders 8a to 8c
The position in which .about.13b has entered the introduction groove 63 (the position shown in FIG. 6) is a standby position, and the selection pin 13c of the lower holder 8c is
The position entered into the upper horizontal groove 65 of 64c is the lower disk selection position for playing the CD of the lower holder 8c, and the selection pin 13c of the lower holder 8c descends to the lower horizontal groove 67 of the cam groove 64c. The selection pin 13b of the middle holder 8b is
The position where it entered the upper horizontal groove 65 of 64b (the position shown in FIG. 7)
Is the intermediate disc selection position for playing the CD in the intermediate holder 8b, the selection pin 13b of the intermediate holder 8b is lowered to the lower horizontal groove 67 of the cam groove 64b, and the selection pin 13a of the upper holder 8a is set to the cam groove 64a. Of the upper holder 8a is selected as an upper disk selection position for reproducing a CD. Therefore, the disc selecting cam 61 is moved from the lower disc selecting position, which is the standby position, to the middle and upper disc selecting positions according to the slide amount.

When the tray 7 is closed by the body 1,
The selection pins 13a to 13c of the holders 8a to 8c enter the introduction grooves 63 of the disc selection cam 61, and the guide pins 18b and 18c of the holders 8b and 8c engage with the disc selection cam 61. The guide pins 18b and 18c are less protruding than the selection pins 13a to 13c, and can be engaged because the protruding amount of the upper edge of the disc selecting cam 61 toward the inner surface side is smaller. When the disc selection cam 61 moves to the rear lower disc selection position, the selection pin 13 of the lower holder 8c is moved.
c enters cam groove 64c and descends, and guide pin 18
c enters the cam groove 64b and descends, and the selection pin 13c and the guide pin 18c descend in parallel, whereby the holder 8c
And the CD descends while maintaining a substantially horizontal state. Similarly, when the disc selection cam 61 moves to the rear intermediate disc selection position, the selection pin 13b of the intermediate holder 8b enters the cam groove 64b and descends, and the guide pin 18b enters the cam groove 64a. Descends, its selection pin 13b and guide pin 1
8b are lowered in parallel, so that the holders 8b and C
D descends while maintaining a substantially horizontal state.

Further, inside the front portions of the both side plates 3 of the body 1, an arm position selecting cam 71 is provided in the front-rear direction along a guide groove 72 (shown in FIGS. 11 and 12) formed in the side plate 3. Each is slidably mounted. The rear end of each arm position selection cam 71 is a disc selection cam 61
The connecting member 61a is overlapped with the connecting portion 61a projecting from the front end of the connecting member.
The disc selection cam 61 and the arm position selection cam 71 are integrally slidable in the front-rear direction.

The arm position selection cam 71 has a pair of front and rear cam grooves 74 formed therein. Each of the cam grooves 74 has an upper groove 75a, an intermediate groove 75b, and a lower groove 75c, and is formed between the upper groove 75a and the intermediate groove 75b and between the intermediate groove 75b and the lower groove 75c. An inclined groove 76 is formed in the groove. An engagement groove 77 is formed in the lower edge of the arm position selection cam 71 by cutting.

The arm support members 81a and 81b are provided inside the arm position selecting cams 71 at the front of the both side plates 3 of the body 1.
Are arranged respectively. Right arm support 81a
The arm shaft 41 has an arm engaging portion 82 that engages with the arm shaft 41, and a shaft engaging portion 84 that engages with a shaft 83 that is provided upright between the bottom plate 2 and the upper surface plate 4. And, it is slidably supported in the vertical direction (disc laminating direction) along the column 83. The left arm support 81b is provided with a link engaging portion 85 that engages with the link shaft 42 and a spindle engaging portion 87 that engages with a support shaft 86 that is erected between the bottom plate 2 and the top plate 4. And is slidably supported in the vertical direction (disc laminating direction) along the link shaft 42 and the support column 86.

The arm engaging portion 82 of the right arm support 81a
The base end of the arm 43 is engaged with the arm support 81.
a and arm 43 are integrated vertically (disc stacking direction)
Moved to Link engagement part of left arm support 81b
The base end of the link 45 is engaged with 85, and this arm support
81b and the link 45 are integrally moved in the vertical direction (disc stacking direction). Further, since the arm 43 and the link 45 are engaged with each other, the arm 43, the link 45, and the arm supports 81a and 81b are integrally moved in the vertical direction (disc stacking direction).

The side surfaces of each of the arm supports 81a and 81b include
A pair of slide grooves 88 are formed in the front and rear direction along the front and rear direction, and a roller 89 as a cam engaging portion that engages with the pair of cam grooves 74 of the arm position selecting cam 71 is rotatably supported. Have been.

The cam groove of the arm position selecting cam 71
Arm support 81 in which roller 89 is engaged with lower groove 75c of 74
The height positions of a and 81b are set to the lower arm height position at which the arm 43 enters the arm entry space A and plays the CD of the lower holder 8c, and the roller 89 is engaged with the intermediate groove portion 75b of the cam groove 74. The height position of the arm supports 81a and 81b is set to the intermediate arm height position at which the arm 43 enters the arm entry space A and plays the CD of the intermediate holder 8b, and the roller 89 is inserted into the upper groove 75a of the cam groove 74. When the arm 43 enters the arm entry space A, the upper position of the arm holder 81a, 81b with which the
The upper arm height position for reproducing the 8a CD is set.

Therefore, the disc selecting cam 61 and the arm position selecting cam 71 provided on both sides of the machine body 1 move integrally in the front-rear direction, and the lower, middle and upper disc selecting cams 61 The lower, middle, and upper arm height positions of the arm position selection cam 71 have a corresponding positional relationship to the disk selection position.

Also, as shown in FIG.
Has a cam 61 for disc selection and a cam 7 for arm position selection.
1, and a drive mechanism 91 for driving an arm moving cam 121 described later. The drive mechanism 91 is provided with the bottom plate 2
The rack plate 92 is slidably disposed in the front-rear direction on the back side of the rack plate 93. A rack gear 93 is formed in the center of the rack plate 92 along the front-rear direction, and a pinion gear 94 meshes with the rack gear 93. Have been. This pinion gear 94
, A rotational driving force from a motor 95 constituted by a pulse motor is transmitted through a plurality of gears 96, and the rack plate 92 is moved in the front-rear direction by the forward and reverse rotation of the pinion gear 94. It is assumed that the rack plate 92 is moved rearward when the motor 95 rotates in the forward direction, and is moved forward when the motor 95 rotates in the reverse direction.

On the left and right edges of the rack plate 92, levers 97 are rotatably supported by shaft members 98, respectively. A spring 99 is stretched between each lever 97 and the rack plate 92, and the right lever 97 is urged to rotate clockwise in the drawing, and the left lever 97 is rotated counterclockwise in the drawing. Be inspired. At the end of each lever 97, a drive pin protruding up and down
There are 100.

The switching plate 10 is located on both sides of the rack plate 92.
1a and 101b are slidably disposed along the front-rear direction, respectively. At the outer and inner edges of each of the switching plates 101a and 101b, engaging projections 102 and 103 are formed so as to protrude. The outer engaging projection 102 is engaged with the engaging groove 77 of the arm position selecting cam 71, The selection cam 61, the arm position selection cam 71, and the switching plates 101a and 101b are integrally moved in the front-rear direction. The engagement protrusion 103 on the inner edge is formed with an engagement groove 104 having a long groove shape in the front-rear direction in which the upper end side of the drive pin 100 can be engaged. 105 are formed.

Guide members 106 with which the lower ends of the drive pins 100 are engaged are fixedly provided on the bottom plate 2 between the rack plate 92 and the switching plates 101a and 101b. On the upper surface of the guide member 106, a disk selecting groove 107 is formed along the front-rear direction, and an arm moving groove 108 is formed along the front and rear parallel to the inside of the disk selecting groove 107. , Each disc selection position of the disc selection cam 61 (each arm height position of the arm position selection cam 71)
Groove 107 for disc selection and groove for arm movement
108 are formed. Each of the inclined grooves 109a to 109c is
From the rear. The right guide member 106 has respective inclined groove portions 109a to 109c.
An inclined guide portion 110 is formed to protrude into the arm moving groove portion 108 from the front edge of the groove.

As shown in FIGS. 3 and 4, inside the arm supports 81a and 81b on both sides of the body 1, holding plate opening plates 111a and 111b as holding plate opening means are provided, respectively. I have. Each of the holding plate release plates 111a and 111b has an engaging projection 112 which slidably engages with a pair of front and rear slide grooves 88 of each of the arm supports 81a and 81b. It is moved in the vertical direction (disc stacking direction) together with 81b. At the rear end of each of the holding plate release plates 111a and 111b, one of the holders 8a to 8c holds a CD to be reproduced by moving the holding plate release plates 111a and 111b backward.
An inclined operating portion 113 that engages with the operation receiving portion 35 of the holding plate 30a to 30c of 8c and swings downward is formed. An inwardly protruding guide plate 114 is formed below the front ends of the holding plate release plates 111a and 111b, and an engagement groove 115 is formed in the guide plate 114.

Pressing plates 116a and 116b are disposed inside the holding plate release plates 111a and 111b so as to be slidable in the front-rear direction with respect to the bottom plate 2, respectively. These push plates 116a, 116b
At the outer edge of the holding plate, an engaging protruding piece 117 that engages with the engaging groove 115 of each holding plate opening plate 111a, 111b is provided upright.
The push plate 111b and the push plates 116a and 116b are integrally moved in the front-rear direction. An elongated hole 118 is formed at the front end side of each of the push plates 116a and 116b and at a position closer to the inside in the left-right direction.

The right push plate 116a is formed with an engagement groove 119 whose middle portion is bent and extends in the front-rear direction.
A guide shaft 135 to be described later, which is connected to the arm 43 side, is inserted therethrough. The guide shaft 135 is also inserted into a guide groove 2a formed in the bottom plate 2 in an arc shape with the arm shaft 41 as a center.
At the standby position (the position shown in FIG. 3) in which the push plate 116a has moved forward, the guide shaft 135 has been moved counterclockwise in the figure, and the arm 43 is in the standby position (the position shown in FIG. 5).
The push-moving plate is interlocked with the movement of an arm-moving cam 121, which will be described later, by a predetermined amount of sliding.
When 116a moves backward, the guide shaft 135 is moved clockwise in the figure, and the arm 43 is moved to the reproduction position (the position shown in FIG. 1).

A drive mechanism 91 is provided on the front side of the rack plate 92.
Arm moving cam 121 is slidably disposed in the front-rear direction. The arm moving cam 121 is urged forward by a spring 122 stretched between the arm moving cam 121 and the bottom plate 2.

The front end of the arm moving cam 121 is formed to protrude in a forked shape, and each of the protruding portions is provided with a pushing link 12.
3 is rotatably supported by a shaft member 124.
The opposing inner end of each push link 123 is rotatably supported on the bottom plate 2 by a shaft member 125, and the opposing outer end is a shaft member 12.
At 6, the push plates 116 a and 116 b are slidably supported by the elongated holes 118. At the standby position (the position shown in FIG. 3) where the arm moving cam 121 has moved forward, the pushing plates 116a and 116b are located forward through the pushing link 123,
When the arm moving cam 121 moves rearward, the push plates 116a and 116b move rearward via the respective push links 123.

The arm moving cam 121 is formed with a cam plate portion 127 which is arranged to cover the guide member 106 below the lever 97. The cam plate portion 127 has a guide member.
A pin moving groove 128 for allowing the drive pin 100 to move in the front-rear direction along the disk selecting groove 107 of 106 is formed, and each of the disk selecting cams 61 of the disk selecting cam 61 is formed on the right edge of the pin moving groove 128. Position (Cam for arm position selection
Pin engagement grooves 129a to 129c are formed corresponding to the respective arm height positions 71) so as to receive the drive pin 100. Each of the pin engaging grooves 129a to 129c is formed so as to be inclined rearward from the pin moving groove 128.

An engaging means 130 is constituted by the drive pin 100, the engaging groove 104 of the switching plate 101b, the pin moving groove 128 of the arm moving cam 121, the pin engaging grooves 129a to 129c, and the like. In 130, the details will be described later,
When the drive pin 100 moves to an arbitrary disc selection position, the drive pin 100 and the switching plate 101b are engaged, and the drive pin 100 and the arm moving cam 121 are disengaged, and
When the driving pin 100 moves by a predetermined amount of sliding of the arm moving cam 121, the driving pin 100 and the switching plate 101b are disengaged, and the driving pin 100 and the arm moving cam 121 are disengaged.
Function to engage.

Further, between the arm 43 and the pushing plate 116a,
An arm drive mechanism that swings the arm 43 between the standby position and the playback position in accordance with the forward and backward sliding of the push plate 116a.
131 are provided. As shown in FIG. 8, the arm driving mechanism 131 has two upper and lower interlocking plates 132 and 133 rotatably engaged with the arm shaft 41. The upper end of the interlocking plate 132 is connected to the arm 43. Hole 43a (shown in FIGS. 1 and 5)
A support shaft 134 is erected so as to be slidable in the vertical direction (disc stacking direction), and a guide shaft 135 inserted into the guide groove 2a of the push plate 116a and the bottom plate 2 is provided on the lower interlocking plate 133.
Is protruding. A restricting portion 136 is formed between the interlocking plates 132 and 133 to allow mutual movement within a predetermined range, and the upper interlocking plate 132 rotates clockwise in FIG. Spring biasing to
137 are installed. Then, the guide shaft 135 is rotated about the arm shaft 41 as a fulcrum by the pushing plate 116a and the guide groove 2a of the bottom plate 2, whereby the arm 43 is moved through the lower interlocking plate 133 and the upper interlocking plate 132. It is swung between a standby position and a reproduction position.

Next, the operation of the present embodiment will be described.

First, when loading a CD, as shown in FIG. 11, the tray 7 is opened and rotated backward from above with respect to the machine body 1, and the holders 8a to 8c are opened in a fan shape. Open holder
Open the holding plates 30a to 30c of the holding plates 8a to 8c, insert a CD into the open portions of the holders 8a to 8c and the holding plates 30a to 30c, and
The center hole of D is engaged with the rotating body 20, the holding plates 30a to 30c are closed, and the CD is stored between the holders 8a to 8c and the holding plates 30a to 30c. After the CD is stored, the tray 7 is closed to the body 1 so that the holders 8a to 8c are overlapped in the disk stacking direction and loaded on the upper side of the tray loading section 6 of the body 1.

At the time of mounting / dismounting the CD, the CD changer mechanism is in a standby state. In this standby state, as shown in FIGS. 3 to 6, the rack plate 92 of the drive mechanism 91 is at the most advanced standby position, and correspondingly, each drive pin 100 is at the most advanced standby position. When each drive pin 100 is at the standby position, each drive pin 100 is connected to each switching plate 101a, 101b.
The guide member 106 is located at the front end of the disc selecting groove 107. The left driving pin 100 is located at the front end of the pin moving groove 128 of the arm moving cam 121.

Therefore, the disc selecting cam 61 is at the standby position where the disc selecting cam 61 has moved to the foremost side via the switching plates 101a and 101b, and the holder 8a is positioned with respect to the introduction groove 63 of the disc selecting cam 61.
8c selection pins 13a to 13c are vertically insertable / removable. Also, the arm position selecting cam 71 is at the standby position where the arm position selecting cam 71 has moved to the foremost side integrally with the disc selecting cam 61, and the arm supporting members 81a, 81b The roller 89 is located at a standby position (lower arm height position) where the arm 43 and the link 45 are lowered most integrally with the arm supports 81a and 81b. Further, the arm moving cam 121 is at the most advanced position,
The arm 43 is at a standby position in front of the tray 7 retracted from the tray 7.

In the loaded state of the tray 7, as shown in FIG. 6, the selection pins 13a to 13c of the holders 8a to 8c enter the introduction grooves 63, and the upper horizontal grooves 65 of the cam grooves 64a to 64c are formed. The guide pins 18b, 18c of the holders 8a to 8c are located at the height of the upper horizontal groove 65 of each of the cam grooves 64a, 64b. Further, the operation receiving portions 35 of the holding plates 30a to 30c of the holders 8a to 8c are located at positions facing the rear of the holding plate release plates 111a and 111b.

The case where the CD in the intermediate holder 8b is reproduced will be specifically described.

In FIG. 5, the forward rotation of the motor 95 of the drive mechanism 91 causes the rack plate 92 to move rearward through the engagement of the pin-on gear 94 and the rack gear 93, and the lever 97
Each drive pin 100 moves rearward through
0 engages with the rear inner edge of the engagement groove 104 of the switching plates 101a and 101b, and while maintaining the engaged state (the drive pins 100 engaged with the rear inner edge of the engagement groove 104 104), switching plates 101a and 101b, cam for disc selection
The arm 61 and the arm position selecting cam 71 move backward together. At this time, in FIG. 3, since the left driving pin 100 moves in the pin moving groove 128 of the arm moving cam 121, the arm moving cam 121 does not move and is kept at the standby position.

As shown in FIG. 7, the disc selecting cam 61
The selection pins 13b and 13c are moved to the respective cam grooves
After entering the upper horizontal grooves 65b and 64c, only the lower selection pin 13c enters the inclined groove 66 of the cam groove 64c, and the selection pin 13c descends along the inclined groove 66. Similarly,
After the guide pins 18b, 18c enter the upper horizontal groove 65 of each of the cam grooves 64a, 64b, only the lower guide pin 18c is moved to the cam groove 64.
b enters the inclined groove 66, and the guide pin 18a
Descend along 66. As a result, as shown in FIGS. 2, 7, and 10, the lower holder 8a and the CD are lowered by the swing of the link member 14c while maintaining the substantially horizontal state, and the lower side of the CD of the intermediate holder 8b is lowered. To form an arm entry space A.

When the arm position selecting cam 71 is moved backward, the rollers 89 of the arm support members 81a and 81b engage with the intermediate groove 75b through the inclined groove 76 of the cam groove 74 of the arm position selecting cam 71. Then, the arm 43 and the link 45 move up integrally with the arm supports 81a and 81b, and the arm 43 enters the arm entry space A and is located at the intermediate arm height position where the CD of the intermediate holder 8b is reproduced.

The motor 95 stops after driving a predetermined number of pulses corresponding to the CD disk selection position of the intermediate holder 8b. During this stop, each drive pin 100 is
106 is located slightly behind the position of the inclined groove 109b (the left driving pin 100 also includes the pin engaging groove 129b of the arm moving cam 121), and the opening 105 of the engaging groove 104 of the switching plates 101a and 101b. Coincides with the position of the inclined groove 109b of the guide member 106 (the opening 105 of the left switching plate 101b also includes the pin engaging groove 129b of the arm moving cam 121). As shown in FIG. 7, the selection pin 13c of the lower holder 8c reaches the lower horizontal groove 67 of the cam groove 64c and the guide pin 18c is
The selection pin 13b of the intermediate holder 8b reaches the lower horizontal groove 67 of the cam holder 64b.

Thereafter, the motor 95 is slightly reversed, and each drive pin 100 moves slightly forward, and the engagement between each drive pin 100 and the rear inner edge of the engagement groove 104 of the switching plates 101a, 101b is released. And each drive pin is
100 moves toward the center of the fuselage 1, and each drive pin 100 comes off through the opening 105 of the engagement groove 104 of the switching plates 101 a and 101 b, and enters the arm movement groove 108 through the inclined groove 109 b of the guide member 106. Engage. Left drive pin 10
0 also engages with the pin engaging groove 129b of the arm moving cam 121.

Thereafter, the motor 95 is rotated forward again, and each drive pin 100 moves backward, and each drive pin 100 is
106, the drive pin 100 on the left side abuts against the rear edge of the pin engaging groove 129b of the cam 121 for arm movement to move the cam 121 for arm movement backward. At this time, each drive pin 100 is
The switching plates 101a and 101b do not move and are kept at the CD selection position of the CD in the intermediate holder 8b because they move on the center side of the body 1 with respect to 101a and 101b.

When the arm moving cam 121 moves rearward, the pushing plates 116a and 116b move rearward, and the guide shaft 135 and the interlocking plates 132 and 13 engage with the engaging grooves 119 of the pushing plate 116a.
3, the arm 43 swings toward the tray 7,
As shown in FIG. 1, the distal end side of the arm 43 enters the lower arm entry space A of the intermediate CD.

At this time, since the link engaging portion 44 on the distal end side of the arm 43 is guided by the guide groove 46 of the link 45 which swings following the arm 43, the deflection on the distal end side of the arm 43 can be prevented. Thus, the swing movement of the arm 43 can be stabilized.
In addition, since the distal end of the arm 43 is supported by the link 45 at the time of reproduction in which the distal end of the arm 43 enters the tray 7, the deflection of the distal end of the arm 43 can be prevented, and the reproduction of the CD can be stabilized. .

When the arm 43 swings to the playback position, the link engaging portion 44 of the arm 43 comes into contact with the end of the guide groove 46 of the link 45, restricting the swing of the arm 43 and positioning the arm 43 at the playback position. I do.

The motor 95 stops after driving each pulse corresponding to each drive pin 100 moving backward by a fixed amount of slide. This motor 95 stops at arm 43
After the swing of the arm 43 is regulated, and after the swing of the arm 43 is regulated, only the lower interlocking plate 133 is further rotated clockwise in FIG.
The spring 137 between the upper link plate 132 and the upper interlocking plate 132 whose swing is regulated integrally with 43 is extended. Therefore, the spring 137
As a result, the arm 43 is held in the clockwise direction, that is, in the reproduction position, via the upper interlocking plate 132.

When the pressing plates 116a and 116b move rearward, the holding plate release plates 111a and 111b move integrally and rearward, and the operating portions at the rear ends of the holding plate release plates 111a and 111b. 11
3 are engaged with the operation receiving portions 35 of the holding plate 30b of the intermediate holder 8b, and as shown in FIG.
8b is pivoted downward with the support shaft 33 as a fulcrum. As a result, as shown in FIGS. 1 and 2, the motor case of the arm 43 in which the pair of abutting pieces 37 of the holding plate 30b have reached the playback position.
It comes into contact with the flange portion 50 of 49 and presses the arm 43 downward. Further, the distal end side of the arm 43 is pushed downward, and the lower portion of the arm 43 contacts the lower holder 8c located in the pushing direction. Therefore, the tip side of the arm 43 is
And the holder 8c on the lower side to prevent swinging of the distal end side of the arm 43 during reproduction, thereby stabilizing reproduction of a CD.

As shown in FIG. 2, when the arm 43 moves to the reproduction position and the turntable 51 enters below the rotating body 20, the metal plate 26 of the rotating body 20 is attracted by the attractive magnetic force of the permanent magnet 54. The rotating body 20 and the CD are lowered via the support 21, and the rotating body 20 and the turntable 51 are engaged. At this time, when the position of the groove 23 of the rotating body 20 and the position of the protrusion 53 of the turntable 51 match, the groove 23 and the protrusion 53 engage, but even when the positions do not match, the turntable 51 is When rotated, the positions match and the groove 23 and the projection 53 engage.

Then, the CD held between the turntable 51 and the rotating body 20 rotates by the driving of the motor 47, and the laser pickup 56 moves on the arm 43 to read and reproduce the signal recorded on the CD. Do.

Next, at the end of the reproduction of the intermediate CD, at the time of the stop operation during the reproduction, or at the time of the reproduction operation of another CD, the operation is temporarily returned to the initial standby state.

The return to the initial standby state is performed by the drive mechanism.
Due to the reverse rotation of the motor 95, each drive pin 100 moves forward via the cam plate 92, and the left drive pin 100 comes into contact with the front edge of the pin engagement groove 129b of the arm movement cam 121 to move the arm. Cam 121 is moved forward. At this time, the left driving pin 100 is acted on toward the pin moving groove 128 by the inclination of the front edge of the pin engaging groove 129b.
Since the lower end of the drive pin 100 moves in the arm movement groove 108 of the guide member 106, the drive pin 100 and the pin engagement groove
The engagement state with 129b is maintained.

The forward movement of the arm moving cam 121 causes the pressing plates 116a and 116b and the pressing plate release plates 111a and 111 to move.
1b moves forward integrally, and the downward movement of the holding plate 30b by the holding plate release plates 111a and 111b is released, and the holding plate 30b is released.
Swing upward due to the urging of the torsion coil spring. Further, the upward swing of the holding plate 30b causes the holding plate 30b to swing upward.
b comes into contact with and pushes up the lower surface of the CD on the turntable 51, and raises the CD to the position of the lower surface of the holder 8b.
And the holding plate 30b. As a result, the rotating body 20 is forcibly pushed up together with the CD, and the rotating body 20 is separated from the turntable 51 against the attractive magnetic force of the permanent magnet 54, thereby releasing the engagement between the rotating body 20 and the turntable 51. .

Further, by the forward movement of the right pushing plate 116a, the guide shaft 135 engaging with the engaging groove 119 of the pushing plate 116a.
The arm 43 swings forward from the tray 7 through the interlocking plates 132 and 133, as shown in FIG.
43 retracts forward from the arm entry space A of the tray 7,
It swings to the standby position on the front side of the body 1. Also at this time, the arm 43 is guided by the guide groove 46 of the link 45, so that it is possible to prevent the tip of the arm 43 from swinging, and to stabilize the swing movement of the arm 43.

When the drive pin 100 moves forward by a predetermined amount of sliding, the arm moving cam 121 returns to the standby position and stops moving forward, and the pin engaging groove 129b of the arm moving cam 121 is moved. The guide member 106 faces the inclined groove 109. At the same time, each drive pin 100 is
106, and faces the inclined groove 109b.

After that, the forward movement of each drive pin 100 is continued, and the right drive pin 100 moves along the inclined guide portion 110 to enter the engagement groove 104 of the switching plate 101a, and the left drive pin 100 moves. Pin 100 is the pin engaging groove of cam 121 for arm movement
It moves along 129b and enters the engagement groove 104 of the switching plate 101b. Further, each drive pin 100 engages with the front inner edge of each engagement groove 104, and while maintaining the engaged state (each drive pin 100 engaged with the front inner edge of the engagement groove 104 engages with the opening of the engagement groove 104. Part 10
5), the switching plates 101a and 101b, the disc selecting cam 61 and the arm position selecting cam 71 are integrally moved forward. At this time, since the left drive pin 100 moves in the pin moving groove 107 of the arm moving cam 121, the arm moving cam 121 does not move and is kept at the standby position.

As the disc selection cam 61 moves forward, the selection pin 13c of the lower holder 8b, which is being lowered, enters the inclined groove 66 of the cam groove 64c, and the guide pin 18 moves.
c enters the inclined groove 66 of the cam groove 64b, and the lower holder 8a
And the link member 14c while the CD and the CD remain almost horizontal.
And returns to the initial standby state as shown in FIG.

When the arm position selection cam 71 is moved forward, the rollers 89 of the arm support members 81a and 81b are engaged with the lower groove 75c through the inclined groove 76 of the cam groove 74 of the arm position selection cam 71. At the same time, the arm 43 and the link 45 descend together with the arm supports 81a and 81b, and move to the standby position (the lower arm height position) where the arm 43 descends most.

Then, each drive pin 100 corresponds to FIG. 3 and FIG.
When the motor 95 returns to the standby position, the motor 95 is stopped, and returns to the standby state before the reproduction.

When reproducing the CD in the lower holder 8c, first, the motor 95 is driven by a predetermined pulse corresponding to the CD selection position of the CD in the lower holder 8c, and each drive pin 100 is driven. The inclined groove 10 of each guide member 106 from the standby position
Move to position 9c. As a result, the disc selecting cam 61 and the arm position selecting cam 71 move rearward, but each of the holders 8a to 8c is located at the standby position (lower disk selecting position) and the arm 43 is also at the standby position (lower arm). Height position).

Subsequently, the motor 95 is driven by a pulse corresponding to the movement of each of the drive pins 100 by a predetermined amount of sliding, the arm moving cam 121 is moved backward, and the arm 43 is moved downward. The arm 8c enters the arm entry space A facing the lower surface of the CD of the holder 8c, and a holding plate of the lower holder 8c.
30c is lowered, the rotating body 20 and the turntable 51 are engaged, and the lower CD is reproduced.

When reproducing the CD in the upper holder 8a, first, the motor 95 is driven by a predetermined pulse corresponding to the CD selection position of the CD in the upper holder 8a, and each drive pin 100 is moved to the standby position. From the inclined groove 109a of the guide member 106
To the position. This allows the disc selection cam
61 and the arm position selection cam 71 are moved backward, and the lower and middle holders 8c and 8b are lowered to move the upper holder 8a.
The arm entry space A is formed below the
Raise 43 to the upper arm height position.

Subsequently, the motor 95 is driven by the number of pulses corresponding to the movement of each drive pin 100 backward by a predetermined amount of sliding, the arm moving cam 121 is moved backward, and the arm 43 is moved to the upper holder. 8a into the arm entry space A facing the lower surface of the CD, and the holding plate of the upper holder 8a.
30a is lowered, the rotating body 20 and the turntable 51 are engaged, and the upper CD is reproduced.

The return from the playback state of the lower and upper CDs to the standby state is the same as the return from the playback state of the intermediate CD to the standby state.

When the distal end of the arm 43 is pushed downward by the lowering of the holding plates 30c and 30a, the lower part of the arm 43 comes into contact with the bottom plate 2 of the body 1 in the case of reproducing the lower CD. In the case of reproducing the upper CD, the lower part of the arm 43 abuts on the intermediate holder 8b.

As described above, since the holders 8b and 8c for removably mounting the CD are connected by the plurality of link members 14b and 14c so as to be movable in the disk laminating direction, the holders 8b and 8c are connected via the link members 14b and 14c. By opening the holders 8a to 8c in a fan shape, the CD can be attached and detached, and by moving any holder 8b, 8c in the disk stacking direction via the link members 14b, 14c, the arm 43 enters. Arm entry space A can be formed.
Structure can be simplified. In addition, it is possible to contribute to simplification of a CD changer using the tray 7.

The drive mechanism 91 integrally moves the disc selecting cam 61 and the arm position selecting cam 71 by a sliding amount corresponding to an arbitrary disc selecting position, and moves the arm moving cam 121 by a fixed sliding amount. Thus, the selection of the CD, the movement of the arm 43 in the direction of stacking the disks, and the movement of the arm 43 in the direction of the tray 7 can be performed by one drive mechanism 91, and the selection of the CD and the movement of the arm 43 in the direction of stacking the disks. And the structure can be simplified by employing a cam mechanism.

That is, the driving force of the drive mechanism 91 is reduced by the combination of the drive mechanism 91 and the engagement means 130.
To the disc selecting cam 61 and the arm position selecting cam 71 and to the arm moving cam 121, thereby selecting a CD, moving the arm 43 in the disc stacking direction, and moving the arm 43 in the tray 7 direction. Can be moved by one drive mechanism 91.

At the time of reproduction in which the distal end of the arm 43 enters the tray 7, the holding plates 30a to 30c holding the CD with respect to the holders 8a to 8c are opened to move the holding plate 30a. Since a part of .about.30c is brought into contact with and pressed against the distal end of the arm 43, the distal end of the arm 43 can be prevented from swinging, and the reproduction of a CD can be stabilized.
In addition, when a part of the holding plate 30a to 30c is pressed against the distal end of the arm 43, the distal end of the arm 43 is pushed, and a part or lower part of the body 1 located in the pushing direction. The upper end of the arm 43 can be held between the holding plate 30a to 30c and the machine body 1 or the lower holder 8b, 8c. Thus, the prevention and the stabilization of the reproduction of the CD can be ensured.

Further, the rotating body 20 for supporting the CD is
Movably supports the holders 8a to 8c in an axial direction perpendicular to the CD surface and rotatably supports the holders 8a to 8c, and at least one of the holders 8a to 8c is positioned at an engagement position between the rotating body 20 of the holders 8a to 8c and the turntable 51. Is a magnet means formed by a permanent magnet 54
Since the rotating means 20 is engaged with the turntable 51 by the attracting magnetic force of the magnet means 55, the CD can be chucked while maintaining the engaged state, and a plurality of CDs can be selectively reproduced by the changer function. Even if you do
D can be reliably chucked by a simple configuration.

When the arm 43 swings with respect to the arm entry space A of the tray 7, the link engaging portion 44 at the tip end of the arm 43 swings by following the arm 43.
Since the guide groove 46 guides the arm 43, it is possible to prevent the distal end of the arm 43 from swinging, and to stabilize the swing movement of the arm 43. Moreover, when recording / reproducing when the tip end of the arm 43 has moved into the arm entry space A of the tray 7, the arm 43 has
Of the arm 43 can be prevented, and the reproduction of the CD can be stabilized. Further, when the arm 43 swings to a predetermined recording / reproducing position, the link engaging portion 44 of the arm 43 is restricted from coming into contact with the end of the guide groove 46 of the link 45. Can be positioned. Further, at the position where the arm 43 is retracted out of the tray 7, the arm 43 and the link 45 are overlapped and the arm shaft 41 and the link shaft 42 are located opposite to each other, so that it is possible to make the device compact.

Note that the information recording disk has a read-only,
Includes both recording-only, recording and reproduction, and includes, for example, compact disks (including music CDs and CDROMs), video disks, recordable and reproducible magneto-optical disks, and flexible magnetic disks.

The recording / reproducing apparatus includes both reproduction-only, recording-only, and both recording and reproduction. Similarly, the head section includes both reproduction-only, recording-only, and recording and reproduction. .

[0103]

According to the information recording / reproducing apparatus of the first aspect, when the arm swings with respect to the tray, the link engaging portion on the tip side of the arm swings following the arm. Since the guide is guided by the guide groove of the moving link, it is possible to prevent the end of the arm from swinging, and to stabilize the swinging movement of the arm. Moreover, at the time of recording / reproduction in which the distal end of the arm enters the tray and moves, since the distal end of the arm is supported by the link, the deflection of the distal end of the arm can be prevented, and the recording / reproducing of the information recording disk can be stabilized. .

According to the information recording / reproducing apparatus of the present invention, when the arm swings with respect to the arm entry space of the tray, the link engaging portion on the tip side of the arm follows the arm. Since the arm is guided by the guide groove of the swinging link, the swing of the tip end side of the arm can be prevented, and the swing movement of the arm can be stabilized. In addition, when recording / reproducing, when the distal end of the arm has moved into the arm entry space of the tray, the distal end of the arm is supported by a link. Can be done.

According to the information recording / reproducing apparatus of the third aspect, in addition to the effect of the information recording / reproducing apparatus of the first or second aspect, the arm swings to a predetermined recording / reproducing position. At this time, since the link engaging portion of the arm is restricted from contacting the end of the guide groove of the link, the arm can be positioned at a predetermined recording / reproducing position.

According to the recording / reproducing apparatus for an information recording disk according to the fourth aspect, in addition to the effect of the recording / reproducing apparatus for an information recording disk according to any one of the first to third aspects, the position where the arm is retracted out of the tray is provided. Thus, since the arm and the link are overlapped and the arm axis and the link axis are located opposite to each other, it is possible to configure a small size.

[Brief description of the drawings]

FIG. 1 is a plan view showing some mechanisms such as a tray, an arm, and a link showing an embodiment of a recording / reproducing apparatus for an information recording disk of the present invention.

FIG. 2 is a cross-sectional view of a part of a tray and a part of an arm according to the embodiment.

FIG. 3 is a plan view showing a part of mechanisms such as a drive mechanism, an arm moving cam, and a holding plate opening means of the embodiment.

FIG. 4 is a side view corresponding to FIG. 3 of the embodiment.

FIG. 5 is a plan view showing some mechanisms such as a drive mechanism, a disc selection cam, and an arm position selection cam of the embodiment.

FIG. 6 is a view corresponding to FIG. 5 of the embodiment, (a) is a side view corresponding to FIG. 5, and (b) is a sectional view of a cam for selecting a disk.

7A and 7B show a state in which the standby state of FIG. 6 has been moved from the standby state to the operating state in the embodiment, FIG. 7A is a side view of a state in which the operating state has been shifted from the standby state in FIG. 6, and FIG. FIG.

FIG. 8 is a plan view showing an arm shaft portion of the arm according to the embodiment.

FIG. 9 is a perspective view of the same embodiment when the disc is attached or detached with the tray opened.

FIG. 10 is a perspective view of the tray of the embodiment when a disc is selected.

FIG. 11 is an overall perspective view of the same embodiment when the disc is attached or detached with the tray opened.

FIG. 12 is an overall perspective view of the same embodiment when the tray is loaded.

[Explanation of symbols]

 7 Tray 8a, 8b, 8c Holder 41 Arm shaft 42 Link shaft 43 Arm 44 Link engaging portion 45 Link 46 Guide groove 47 Motor as drive unit 51 Turntable 56 Head unit A Arm entry space CD Compact disc as information recording disc

Claims (4)

[Claims] An information recording disk includes a tray for detachably supporting an information recording disk, a link engaging portion on a tip end side, a turntable for engaging the information recording disk, and a driving portion for rotating the turntable. An arm having a head portion for recording and reproducing data on and from a disk, an arm pivoting around an arm axis positioned on a side of the tray, and a leading end of the arm moving forward and backward with respect to the tray; A link groove having a guide groove movably engaged with the link, and a link that swings following the swing of the arm about a link shaft positioned on a side of the tray. An information recording / reproducing apparatus for recording / reproducing an information recording disk. 2. An information recording disk having a plurality of holders for detachably supporting an information recording disk, the holder being moved in a disk stacking direction substantially perpendicular to the information recording disk surface to perform recording and reproduction. A tray on which an arm entry space is formed, a link engaging portion on the front end side, a turntable for engaging the information recording disk, and a driving portion for rotating the turntable; It has a head portion for reproduction, is moved in the disk stacking direction corresponding to the position of the information recording disk surface for recording and reproduction, and swings around an arm axis located on the side of the tray as a fulcrum. An arm whose side is advanced / retracted with respect to the arm entry space; and a guide groove in which a link engaging portion on the distal end side of the arm is movably engaged. Recording and reproducing apparatus of an information recording disk, characterized in that it the fulcrum link shaft which is positioned to the side of the ray by being driven by the swinging of the arm comprises a link to be swung. 3. The link according to claim 1, wherein when the arm swings to a predetermined recording / reproducing position, the link engaging portion of the arm is regulated to abut on the end of the guide groove of the link. Recording / reproducing device for information recording disk. 4. In a position where the arm is retracted out of the tray,
4. The recording / reproducing apparatus for an information recording disk according to claim 1, wherein the arm and the link are overlapped, and the arm axis and the link axis are located opposite to each other.