JPH05128687A - Shutter opening mechanism - Google Patents

Abstract

PURPOSE:To make a shutter member of a disk cartridge in a full open state by a shutter releasing pin only at the first half of an inserting process into a cartridge holder of the disk cartridge. CONSTITUTION:On a first shutter opening lever 37 supported rotatably on an upper surface part of a cartridge holder 28, a second opening lever 43 pressed to an initial position side by a stretched spring 43a is attached slidably. The shutter opening pin 41 is attached on a tip side of the second shutter releasing lever.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter opening mechanism which is a main part of a recording and / or reproducing apparatus for recording and / or reproducing an information signal by using a disk cartridge having a recording disk housed in the cartridge. ..

[0002]

2. Description of the Related Art Conventionally, a recording and / or reproducing apparatus configured to record and / or reproduce an information signal by using a disk cartridge in which a recording disk such as an optical disk or a magneto-optical disk is housed in a cartridge. Is proposed.

This recording and / or reproducing apparatus includes a loading mechanism for transporting the disc cartridge to a predetermined mounting position, a rotary drive mechanism for holding and rotating the recording disc of the disc cartridge at the mounting position, A pickup device for writing and / or reading an information signal to / from a recording disk held by a rotary drive mechanism is provided on a chassis.

The loading mechanism is configured to move a cartridge holder, which is configured to hold the disc cartridge, by using a cam or the like. The cartridge holder is arranged so as to hold the disc cartridge in a state parallel to the chassis. The loading mechanism first operates to move the disc cartridge held by the cartridge holder in a direction along the main surface of the recording disc, that is, in a direction parallel to the chassis. Then, the loading mechanism moves the disc cartridge in a direction perpendicular to the chassis so as to approach the chassis when the recording disc is positioned directly above the rotation drive mechanism.

As described above, the recording disk of the disk cartridge moved and operated in the direction approaching the chassis is held by the rotary drive mechanism arranged on the chassis.

The loading mechanism has a shutter opening mechanism. The shutter opening mechanism opens the shutter member of the disc cartridge during the loading operation of the disc cartridge by the loading mechanism. That is, in the disc cartridge, a part of the signal recording surface of the recording disc is exposed to the outside through an opening provided in the cartridge, and a shutter movably attached to the cartridge through the opening. It can be opened and closed by a member. Therefore, in the loading operation, it is necessary to move the shutter member with respect to the cartridge to expose a part of the signal recording surface to the outside through the opening.

The shutter opening mechanism has a shutter opening lever, which is rotatably supported at the base end side via a support shaft, on the upper surface of the cartridge holder. A shutter opening pin is provided on the tip side of the shutter opening lever. The shutter opening pin is suspended in the cartridge holder via a slit formed in the upper surface of the cartridge holder. The slit is formed in an arc shape with the spindle as the center. That is, when the shutter release lever rotates about the support shaft, the shutter release pin moves in the slit. The shutter release lever is urged to rotate by a torsion coil spring in a direction in which the shutter release pin is on the front side.

When the disk cartridge is inserted into the disk cartridge having the shutter opening mechanism as described above from the front side, the shutter opening pin comes into contact with one side of the shutter member of the disk cartridge. When the disc cartridge is inserted into the cartridge holder, that is, toward the rear side, the shutter opening pin is pressed against the front end of the cartridge of the disc cartridge, and the shutter opening lever is moved to the above-mentioned position. It is rotated against the biasing force of the torsion coil spring. Then, the shutter opening pin moves along the front end portion of the cartridge, and moves the shutter member in the other side direction of the cartridge to open the opening portion.

The pickup device is arranged on the chassis so as to face the main surface portion of the recording disk which is rotationally operated by the rotary drive mechanism, that is, the signal recording surface of the recording disk. .. The pickup device is supported over the inner and outer circumferences of the recording disc so as to be movable in the radial direction of the recording disc. When the pickup device is moved in the radial direction of the recording disc and the recording disc is rotationally operated, the pickup device passes through the opening portion of the cartridge, and substantially the signal recording surface of the recording disc. Information signals can be written and / or read over the entire surface.

[0010]

By the way, in the shutter opening mechanism having the shutter opening lever as described above, the shutter member is in a state in which the disc cartridge is completely stored in the cartridge holder. Otherwise, the entire opening of the cartridge cannot be opened. That is, the shutter member does not open the opening during the insertion operation of the disc cartridge into the cartridge holder.

Therefore, the moving locus of the disc cartridge in the inserting operation of the disc cartridge corresponds to the thickness of the shutter member over substantially the entire stroke of the inserting operation. Therefore, it is necessary to provide the pickup device and the like on the outer side of the traveling locus, and it is difficult to reduce the size of the recording and / or reproducing device configured by using the shutter opening mechanism.

Further, in this shutter opening mechanism,
In a state where the direction connecting the support shaft and the shutter opening pin is substantially orthogonal to the front end portion of the cartridge, movement by insertion operation of the cartridge is converted into rotational force for the shutter opening lever. descend. That is, in such a state, the pressing force applied to the shutter opening pin of the cartridge is
Since the state is almost the direction toward the support shaft, a large pressing force on the shutter opening pin is required to rotate the shutter opening lever. Therefore, in this shutter opening mechanism, it may be difficult to smoothly insert the disc cartridge.

Therefore, the present invention has been proposed in view of the above situation, and the shutter member of the disk cartridge can be opened even during the insertion operation of the disk cartridge. An object of the present invention is to provide a shutter opening mechanism in which there is a possibility that a smooth insertion operation of a disc cartridge may be hindered.

[0014]

In order to solve the above-mentioned problems and achieve the above-mentioned object, a shutter opening mechanism according to the present invention has a recording disk and a part of this recording disk exposed to the outside through an opening. A cartridge holder into which a disk cartridge having a cartridge that is rotatably housed and a shutter member that is movably supported by the cartridge and that opens and closes the opening is inserted, and a spindle is attached to the main surface of the cartridge holder. A first shutter release lever rotatably attached through the first shutter release lever, a second shutter release lever slidably supported by the first shutter release lever and provided with a shutter release pin on the tip side, and the cartridge. The shutter opening pin is formed on the main surface of the holder with an arcuate portion centered on the spindle and a straight portion. And a guide slit for advancing the shutter opening pin into the cartridge holder, and elastically urging the first and second shutter opening levers to move the shutter opening pin to an initial position which is a starting end portion of the guide slit. The shutter opening pin contacts one side of the shutter member when the disc cartridge is inserted into the cartridge holder, and the shutter opening pin is inwardly of the cartridge holder of the disc cartridge. Is pressed by the cartridge in accordance with the insertion operation of the guide slit and moved along the arcuate portion of the guide slit on an arcuate locus centered on the support shaft to move the shutter member in the other side direction. After that, it is moved along the straight line portion of the guide slit.

[0015]

In the shutter opening mechanism according to the present invention, the first member is rotatably attached to the main surface of the cartridge holder into which the disk cartridge is inserted and operated, via the support shaft.
Second slidably supported by the shutter release lever
When the disc cartridge is inserted into the cartridge holder, the shutter release pin attached to the tip end side of the shutter release lever of the disk cartridge comes into contact with one side of the shutter member of the disk cartridge, and the cartridge holder of the disk cartridge. Is pressed by the cartridge of the disc cartridge in accordance with the inserting operation to the inner side of the disk, and along the arc-shaped portion of the guide slit formed on the main surface portion of the cartridge holder, the arc-shaped locus with the spindle as the center. Since the shutter member is moved upward to move to the other side direction and then moved along the straight line portion of the guide slit, the shutter is moved in the middle of the moving process of the cartridge in the insertion operation of the disc cartridge. Complete the movement of the member.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. In this example, a shutter opening mechanism according to the present invention is used, as shown in FIGS.
This is an example applied to a recording and / or reproducing apparatus for recording and / or reproducing an information signal by using 01.

The disk cartridge 101 is shown in FIG.
As shown in FIGS. 1 and 12, the magneto-optical disk 102 is rotatably housed in a cartridge 108. The magneto-optical disk 102 has a disk substrate made of a transparent material such as synthetic resin and a signal recording layer made of a magnetic material adhered to one main surface of the disk substrate, and has a disk shape. Has been done. A hub mounting hole is provided in the center of the disc 102. A disk hub 106 for holding the disk 102 on the disk table 4 of the recording and / or reproducing apparatus is mounted in the hub mounting hole as described later. The disc hub 106 is made of a magnetic material such as metal and has a substantially disc shape.
It is substantially concentric with respect to 2 and is attached to the disk 102 by means such as adhesion or welding. At the center of the disc hub 106, a center hole 107 is formed which is centered on the center of curvature of a recording track which is substantially concentric and spirally formed on the signal recording layer.

The cartridge 108 is formed into a thin casing capable of accommodating the disc 102 by assembling the pair of upper and lower halves 108a and 108b into abutment with each other. As shown in FIG. 6, the main surface of the upper side of the cartridge 108 has the disc 102.
An upper recording / reproducing opening 104 is provided so that one of the main surface portions faces the outer side over the inner and outer circumferences. Further, the lower main surface portion of the cartridge 108 is provided with a lower recording / reproducing opening 110 for exposing the other main surface portion of the disk 102 to the outer side over the inner and outer circumferences.
The lower recording / reproducing opening 110 is formed at a position opposite to the upper recording / reproducing opening 104 and has substantially the same size as the upper recording / reproducing opening 104.

A chucking opening 109 for exposing the disc hub 106 to the outside is provided at the center of the lower main surface of the cartridge 108. Then, as will be described later, a positioning contact recess 105 for contacting the contact projection 68 of the cartridge positioning member 67 of the shutter opening mechanism according to the present invention is formed in the peripheral portion of the chucking opening 109. Has been done.

A shutter member 103 is attached to the cartridge 108. The shutter member 103 is formed of a synthetic resin, a metal plate, or the like as a U-shaped member for sandwiching the upper and lower main surface portions of the front edge side portion of the cartridge 108 by means such as injection molding and bending. There is. That is, this shutter member 10
Reference numeral 3 denotes an upper shutter plate portion 103a attached to an upper main surface portion of the cartridge, a lower shutter plate portion 103b opposed to each other in parallel with the upper shutter plate portion, and base end sides of these shutter plate portions. Connecting plate portion 103 for connecting
c and are integrally formed. The shutter member 103 has the connecting plate portion 103c attached to the front end surface portion of the cartridge 108, and the connecting plate portion 103c is slidably supported by the cartridge 108 along the front end surface portion. In each of the shutter plate portions 103a and 103b, a pair of openings 112 and 111 are formed at positions closer to one side of the connecting plate portion in the slidable direction with respect to the cartridge 108.

As shown in FIG. 11, when the shutter member 103 is located at one side of the cartridge 108, the shutter plate portions 103a, 103a,
The other side portion 103b is provided with the recording / reproducing opening 10 described above.
These recording / reproducing openings 10 corresponding to 4, 110
As shown in FIG. 12, when the lids 4 and 110 are closed, the openings 112 and 111 are made to correspond to the recording and reproducing openings 104 and 110, respectively, when they are located on the other side of the cartridge 108. The recording / reproducing openings 104 and 110 are opened. It should be noted that the shutter member 103 is provided with a biasing spring (not shown) provided in the cartridge 108 so that the recording / reproducing opening 10 is formed.
It is elastically urged in one direction closing the lids 4, 110.

The shutter opening pin fitting portion 113 is a front end surface portion of the cartridge 108, which is one side of the connecting plate portion 103c when the recording / reproducing opening portions 104 and 110 are closed. Has been done.

The openings 112 and 111 of the shutter member 103 are formed so as to hang on both sides of the connecting plate 103c. That is, the portion of the connecting plate portion 103c corresponding to each of the openings 112 and 111 is narrower than the other portions, and has a width smaller than the thickness of the disc 102.
The portion of the cartridge 108 facing the side edge of the disk 102 and corresponding to the recording / reproducing openings 104, 110, that is, the recording / reproducing openings 104, 110 is opened. The front edge portion 116 of the cartridge 108, which is exposed to the outside through the openings 112 and 111 of the shutter member 103 when being released,
It is made thinner than the thickness of the disk 102.

Further, a locked recess 117 is provided on the other side edge of the cartridge 108. The locked recessed portion 117 is provided as a recessed portion opened to the main surface portion of the lower half 108b, that is, the bottom surface side of the cartridge 108, at a substantially central position of the side edge portion on the other side of the cartridge 108. ing.

Then, the recording and / or reproducing apparatus is
As shown in FIG. 1 and FIG. 2, the bottom portion has a housing 1 having a chassis 2. The housing 1 is formed so that the front surface side is open. The open front side of the housing 1 is closed by a front panel 24.
The front panel 24 is provided with a slit-shaped disc cartridge insertion hole 25 into which the disc cartridge 101 can be inserted. The disc cartridge insertion hole 25 has an insertion hole lid 26.
It is possible to open and close. This insertion hole lid 26
Is formed in an elongated rectangular plate shape corresponding to the disc cartridge insertion hole 25, and both ends of the rotation shaft 27 attached along the longitudinal direction are rotated in the inner portion of the disc cartridge insertion hole 25. Supported as possible. The insertion hole cover 26 opens and closes the disc cartridge insertion hole 25 by being rotated around the rotation shaft 27.

On the chassis 2 which is the bottom plate of the housing 1, there is formed a signal recording / reproducing section having a rotation driving means, an optical head means, a magnetic field generating means and the like.

That is, on the chassis 2, a spindle motor 3 constituting a rotation driving means for rotating the disk 102 of the disk cartridge 101.
Are arranged. The spindle motor 3 is attached to an elevating block 6 which constitutes loading means. The elevating block 6 is formed in a substantially annular shape, and the spindle motor 3 is fitted in the central hole 9 to support the spindle motor 3. The elevating block 6 has a plurality of shaft insertion holes 8, 8 and 8 provided with sliding bearings, and a plurality of shaft insertion holes 8, 8 and 8 planted in the chassis 2 are provided in the shaft insertion holes 8, 8 and 8. By inserting the motor guide shafts 7, 7, 7, the chassis 2 is moved along the motor guide shafts 7, 7, 7 as shown by arrows M and N in FIG.
It is supported so as to be movable in the approaching and separating directions with respect to. That is, the spindle motor 3 is movable in the contacting / separating direction with respect to the chassis 2. The spindle motor 3 is supported with a spindle shaft 5 integrated with a drive shaft being substantially perpendicular to the chassis 2. The tip end side of the spindle shaft 5 faces the upper side of the chassis 2.

A disk table 4 is attached to the drive shaft of the spindle motor 3 so as to surround the periphery of the tip end side of the spindle shaft 5. The disc table 4 is formed on a disc having substantially the same diameter as the disc hub 106 so that the disc hub 106 attached to the disc 102 can be placed thereon. An annular magnet is integrally attached to the disc table 5 between the spindle shaft 5 and the peripheral portion of the disc table 4. The magnet serves to attract the disc hub 106 of the disc 102 placed on the disc table 4.

Further, on the upper surface of the elevating block 6,
A substantially annular cartridge positioning member 67 is attached so as to be on the peripheral side of the disk table 4. The cartridge positioning member 67 has at least three abutting protrusions 68 formed on the upper surface thereof. The plane determined by the projecting end portions of the contact protrusions 68 is closer to the chassis 2 than the surface of the disc table 4 on which the disc hub 106 is mounted, and the disc hub of the disc table 4 is located. It is made parallel to the surface on which 106 is placed.

Then, on the chassis 2, at a position on the front side of the spindle motor 3, the elevating motor 11 for moving the elevating block 6 together with the disc table 4 and the like to and from the chassis 2, that is, an elevating motor 11 is operated. Are arranged. The lift motor 11 is supported by a support member attached to the chassis 2 so that its drive shaft is parallel to the chassis 2 and one end of the drive shaft is disposed toward the lift block 6. ing. A cam plate 15 whose outer peripheral edge portion is a cam portion is attached to one end side of the drive shaft of the lifting motor 11. On the cam portion of the cam plate 15, an engaging pin 6a that is planted on the side portion of the elevating block 6 is placed and engaged. The lifting block 6 is driven by the lifting motor 11 to move the cam plate 1
When 5 is rotated, the cam plate 15 moves up and down. The elevating motor 11 is a so-called stepping motor, and is configured so that the rotational angle position can be accurately controlled.

The lifting block 6 has a tension spring 1 stretched between the lifting block 6 and the chassis 2.
0, it is elastically biased in the direction approaching the chassis 2, and the engagement pin 6a is brought into pressure contact with the cam plate 15 so as to abut and engage with the cam plate 15.

The lifting motor 11 has the other end of the drive shaft exposed to the outside through a drive shaft operating hole 13 formed in the front panel portion 24. As shown in FIG. 2, the drive shaft operating hole 13 is for inserting the manual eject tool 201 into the housing 1 and rotating the drive shaft of the elevating motor 11 by manual operation.

An optical pickup device, which is an optical head means composed of an optical block portion 18 and an objective lens driving device portion 17, is arranged on the chassis 2 at a position rearward of the spindle motor 3. This optical pickup device is for irradiating the disc 102 mounted and mounted on the disc table 4 with a light beam for writing and reading an information signal.

As shown in FIG. 3, the optical block section 18 accommodates a laser diode 50 as a light source and a plurality of optical devices for guiding a light beam emitted from the laser diode 50 in a block as a lens barrel. It has been configured. That is, in the optical block unit 18, the divergent light beam emitted from the laser diode 50 is incident on the collimator lens 51, and is made into a parallel light beam by the collimator lens 51. The parallel light beam transmitted through the collimator lens 51 is incident on the galvanometer mirror 53 via the beam splitter prism 52. The galvano mirror 53 is controlled by the control means described later, and deflects the incident parallel light beam based on a predetermined control signal and reflects it. The parallel light beam reflected by the galvano mirror 53 is emitted from the optical block unit 18 and enters the objective lens driving device unit 17.

Then, the objective lens drive unit 17
Has a frame, and is provided with a pair of guide shafts 63 and 64 in the frame. The guide shafts 63, 64 are parallel to each other and are supported in parallel with the chassis 2 by the frame. These guide shafts 63, 6
A lens bobbin block 60 is arranged between the four. The lens bobbin block 60 is movable along the guide shafts 63 and 64 in the direction along the chassis 2. That is, the guide shafts 63, 6 of the lens bobbin block 60 are
Three guide rollers 61, 61, 61, 62, 62, 62 are provided on both sides, which are the sides facing 4, respectively. At least one of the guide rollers 61, 61, 61 on one side of the lens bobbin block 60 is supported by a support shaft projecting obliquely upward from the lens bobbin block 60 in the direction of 45 °, and the other ones. It is supported by a support shaft projecting obliquely downward at 45 ° from 60. And these guide rollers 61, 61, 61 are
The guide shaft 63 is sandwiched so that it can roll on the guide shaft 63. Further, the guide roller 6 on the other side of the lens bobbin block 60 is also provided.
2, 62 and 62 are the guide rollers 63 and 6 on the one side.
As in the case of 3, 63, at least one is supported by a support shaft projecting obliquely upward 45 ° from the lens bobbin block 60, and the other is projected obliquely downward 45 ° from the lens bobbin block 60. It is supported by a spindle. The guide rollers 62, 62, 62 can roll on the guide shaft 64 so as to sandwich the guide shaft 64.

The movable direction of the lens bobbin block 60, that is, the guide shafts 63,
The axial direction of 64 is as shown by an arrow L in FIGS. 1 and 3.
The direction of contact and separation is with respect to the spindle motor 3. Further, the lens bobbin block 60 is moved and operated along the guide shafts 63 and 64 by the feed motor 65 arranged in the frame of the objective lens driving device section 17. The feed motor 65 is composed of a so-called linear motor.

An objective lens 55 is provided on the upper surface of the lens bobbin block 60. The objective lens 55 is fixedly attached to the lens bobbin block 60. Further, inside the lens bobbin block 60, a reflection mirror 54 for reflecting the parallel light beam incident from the optical block portion 18 and making it enter the objective lens 55 is disposed. That is, the collimated light beam that has entered the objective lens drive unit 17 from the optical block unit 18 enters the objective lens 55 through the reflection mirror 54 to be a focused light beam. It is injected in parallel with the spindle shaft 5 and upward in the direction away from the chassis 2.

The light beam emitted from the objective lens 55 and reflected by the disc 102 on the disc table 4 enters the objective lens 55 again to be a parallel light beam, and reaches the reflection mirror 54. The reflection mirror 54 reflects the light beam that is re-incident on the objective lens 55 and reaches the reflection mirror 54, and returns it to the optical block section 18 side. The optical block section 18 has a built-in photodetector and the like for detecting the light beam returned to the optical block section 18. That is, the light beam returned from the objective lens driving device section 17 to the optical block section 18 returns to the beam splitter prism 52 via the galvano mirror 53. Here, the beam splitter prism 52 converts the light beam returned from the galvano mirror 53 into the collimator lens 51.
The light is incident on the Wollaston prism 56 without returning to the side. The Wollaston prism 56 is configured by joining two right-angle prisms formed of a material having optical anisotropy such as calcite and quartz, in such directions that their optical axes are orthogonal to each other. The light beam incident on the Wollaston prism 56 is split into two linearly polarized lights having vibration planes orthogonal to each other. The light beam that has passed through the Wollaston prism 56 passes through the condenser lens 57 and the multi-lens 58 and is received by the photo diode 59 that is a photodetector. The condenser lens 57 is a convex lens. The multi-lens 58 is a lens in which one surface is a concave surface and the other surface is a cylindrical surface (cylindrical surface).

The optical axis of the objective lens 55 between the focal point of the light beam focused by the objective lens 55 and the signal recording surface of the disc 102, based on the light detection output from the photo diode 59. Focus error signal indicating the amount of deviation in the direction, the objective lens 55 between the condensing point and the recording track formed on the signal recording surface.
It is possible to obtain a tracking error signal indicating the amount of deviation in the direction orthogonal to the optical axis, a read signal obtained by reading the information signal written in the recording track, and the like.

As shown in FIGS. 1 and 4, the lens bobbin block 60 has a magnetic head device 6 serving as a magnetic field generating means via a magnetic head supporting arm 19.
6 is attached. The magnetic head device 66 is for applying an external magnetic field for writing an information signal to the disk 102. The magnetic head support arm 1
The lens bobbin block 60 has a base end side supported by the lens bobbin block 60, and a middle portion thereof is bent so that a front end side faces the objective lens 55. The magnetic head device 66 is attached to the tip end side of the magnetic head support arm 19 and faces the objective lens 55. These magnetic head devices 6
6 and the objective lens 55 face each other with an interval equal to the total length of the thickness of the disk 102 and the working distance of the objective lens 55. The working distance of the objective lens 55 means that the objective lens 55 extends from the tip of the objective lens 55.
Is the distance to the focal point of.

A cartridge holder 2 is arranged in the housing 1 so as to be above the chassis 2. The cartridge holder 28 is formed into a substantially flat plate shape having a pair of holder portions 29 and 30 on both sides by means of bending a metal plate or the like. The pair of holder portions 29, 30 are bent such that both side portions of the cartridge holder 28 are bent toward the chassis 2 side, and the side edge portions of these both side portions are bent in parallel with the chassis 2. As a result, it has a hook-shaped cross section. This cartridge holder 28
Both sides are supported by the inner wall of the housing 1, and are arranged parallel to the chassis 2.

The cartridge holder 28 has a structure in which the disc cartridge 10 is provided between the holder portions 29 and 30.
1 is formed so that the insertion operation can be performed from the front side. The disc cartridge 101 inserted between the holder portions 29 and 30 has the holder portion 2
Both sides are supported and held by 9, 30. The cartridge holder 28 is arranged so that its front portion is located behind the disc cartridge insertion hole 25. That is, the disc cartridge 1 inserted through the disc cartridge insertion hole 25.
01 is inserted between the holder portions 29 and 30 of the cartridge holder 28.

Then, on the upper surface of the cartridge holder 28, the cartridge pressing spring portion 3 is provided at a position corresponding to the four corners of the cartridge 108 of the disk cartridge 101 inserted between the holder portions 29 and 30.
1, 32, 33, 34 are provided. These cartridge pressing spring portions 31, 32, 33, 34 have U-shaped notches formed on the upper surface of the cartridge holder 28, and the inner portions of the notches bulge toward the chassis 2 side. It is formed by being bent.
These cartridge pressing spring portions 31, 32, 33, 34
Presses the disk cartridge 101 inserted between the holder portions 29 and 30 toward the chassis 2 side.

As shown in FIGS. 1, 7 and 8, a first shutter release lever for opening the shutter member 103 of the disc cartridge 101 is provided on the upper surface of the cartridge holder 28. A shutter opening rotation lever 37 is attached. The shutter opening rotation lever 37 is rotatably supported on the base end side by a substantially central portion on the front side of the cartridge holder 28 via a support shaft 38. The front end side of the shutter opening rotary lever 37 is directed toward one side of the cartridge holder 28.

Then, the shutter opening rotary lever 3 is used.
A shutter opening slider 43 serving as a second shutter opening lever is slidably attached to the device 7. The shutter release slider 43 is formed in a substantially elongated plate shape and has a slide guide slit 43a extending in the longitudinal direction. The shutter opening slider 43 includes a pair of guide pins 42, 42 set on the shutter opening turning lever 43, and the slide guide slit 43.
The guide pins 42, 42 are slidably supported in the arrangement direction of the guide pins 42, 42.

A shutter opening pin 41 is erected on the tip end side of the shutter opening slider 43 so as to hang down toward the chassis 2 side. The shutter opening pin 41 is inserted into a guide slit 36 provided on the upper surface of the cartridge holder 28, and is inserted between the holder portions 29 and 30 via the guide slit 36. In the guide slit 36, a portion extending from the front side portion of the cartridge holder 28 to the central portion of the cartridge holder 28 is formed as an arc-shaped portion centered on the support shaft 38, and the cartridge holder 28 is formed.
The portion extending from the central portion of the cartridge holder 28 to the rear side portion thereof is a linear portion extending in the front-rear direction,
Has been formed.

The shutter opening pin 41 moves within the arcuate portion of the guide slit 36 when the shutter opening rotation lever 37 rotates. Further, when the shutter opening pin 41 is formed in the central portion of the cartridge holder 28 by the rotation of the shutter opening rotating lever 37, the shutter opening slider 43 moves to the shutter opening rotating lever 37. By sliding with respect to the guide slit 36, the guide slit 36 moves in the linear portion.

Then, the shutter opening rotation lever 3 is used.
A torsion coil spring 39, which serves as an urging means in which a coil portion is supported by the support shaft 38, is rotationally urged in a direction in which the shutter opening pin 41 shown by an arrow A in FIG. ing. The torsion coil spring 39 has one arm portion that engages with the locking portion 3 of the shutter opening rotation lever 37.
7a, and the other arm is engaged with a locking claw 40 provided on the cartridge holder 28. Further, the shutter opening slider 43 is elastically biased by a tension coil spring 43a serving as a biasing means in a direction in which the shutter opening pin 41 indicated by an arrow B in FIG. This tension coil spring 4
3a has one end locked to a locking portion 43c on the base end side of the shutter opening slider 43 and the other end locked to a locking claw 37b provided on the shutter opening rotation lever 37. There is.

In the initial state where the disc cartridge 101 is not inserted into the cartridge holder 28, the shutter opening pin 41 is positioned at the initial position where it abuts against the front end of the guide slit 36.

Then, the control means of the recording and / or reproducing apparatus is constituted by including a control device (not shown). This control device has a predetermined electronic circuit so as to control the operations of the spindle motor 3, the optical pickup device, the magnetic head device 66, and the like based on various input signals. There is. The control device receives an operation signal input from the outside of the recording and / or reproducing device via an input device manually operated, a signal output from the optical pickup device, the spindle motor 3 and the lifting / lowering device. A detection signal for detecting the rotation speed and the rotation angle position of the motor 11, a signal for detecting the completion of the insertion operation of the disc cartridge 101 into the cartridge holder 28, and the like are sent. In this recording and / or reproducing apparatus, a tracking servo operation by driving the galvano mirror 53 in the optical pickup apparatus, a focus servo operation by driving and controlling the elevating motor 11, and a rotation speed of the spindle motor 3. The spindle servo operation and the like for keeping the speed at a predetermined speed are performed under the control of the above-mentioned control device.

In order to mount and operate the disc cartridge 101 in the shutter opening mechanism according to the present invention constructed as described above, first, the disc cartridge 10 is to be operated.
1 is inserted through the disc cartridge insertion hole 25 and held between the holder portions 29 and 30. At this time, as shown by an arrow J in FIGS. 1 and 4, the disc cartridge 101 is inserted while the shutter member 103 is on the front side.

Then, as shown in FIG. 8, the lower end portion of the shutter opening pin 41 has the cartridge 108.
Of the shutter member 103, which is in the vicinity of one end of the connecting plate portion 103c of the shutter member 103, that is, the shutter opening pin fitting portion 113. When the disc cartridge 101 is further inserted into the inside of the holder portions 29 and 30, the shutter opening pin 41 is released.
Is pressed by the cartridge 108 and causes the shutter opening rotary lever 37 to move to the torsion coil spring 3.
As shown by an arrow C in FIG. 9, while rotating against the biasing force of the guide member 9, the guide slit 36 moves rearward along the arcuate portion of the guide slit 36.

As shown in FIG. 9, the shutter opening pin 41 presses the connecting plate portion 103c of the shutter member 103 by the lower end side portion when it is moved to the substantially central portion of the cartridge holder 28. , The shutter member 103 to open the recording / reproducing openings 104,
110 is opened. When the shutter member 103 opens the recording / reproducing openings 104 and 110,
The front end side portions of the openings 112 and 111 of the shutter member 103 are located substantially at the center of the front side portion of the cartridge 108. Then, as shown in FIGS. 12 and 4, the front edge portion 116 of the cartridge 108 has openings 112, 111 of the shutter member 103.
It will be in a state of facing the outside through.

The disk cartridge 101, which is further inserted toward the rear side, is pressed and supported by the cartridge pressing spring portions 31, 32, 33 and 34 on the chassis 2 side between the holder portions 29 and 30. In this state, the rearward movement is performed. Then, in the disc cartridge 101, first, the narrow portion of the connecting plate portion 103c is provided with the objective lens 55 and the magnetic head device 66.
, And then the leading edge portion 116 of the cartridge 108 between the objective lens 55 and the magnetic head device 66, and as shown in FIG.
The disk 102 is inserted between the objective lens 55 and the magnetic head device 66. At this time, since the distance between the objective lens 55 and the magnetic head device 66 is made wider than the thickness of the disc 102, the disc 102 contacts the objective lens 55 or the magnetic head device 66. Without being inserted between the objective lens 55 and the magnetic head device 66.

At this time, the shutter opening pin 4
1 is pressed against the cartridge 108,
As shown in FIG. 10, the shutter release slider 43 resists the biasing force of the tension coil spring 43a,
It is slid with respect to the shutter opening rotation lever 37. As shown by the arrow D in FIG. 10, the shutter opening pin 41 is moved in the linear portion of the guide slit 36 toward the rear side, that is, in the direction away from the support shaft 38.

At this time, the lifting block 6 is
The tension coil spring 10 is urged to move to the chassis 2 side and positioned at the initial position.

Then, the above-mentioned disc cartridge 101
When the disk is inserted to the predetermined insertion completion position, as shown in FIG. 5, the disk table 4 and the disk hub 106 are substantially coaxial and face each other. At this time, the fact that the disc cartridge 101 has been mounted to the insertion completion position is detected by a detection device (not shown), and a detection signal indicating this detection is sent to the control device.

The detecting device includes, for example, a so-called photocoupler, and detects the completion of the inserting operation of the disc cartridge 101 by optical means or various other means. It is configured.

The control device, which receives the detection signal from the detection device, drives the lifting motor 11. By driving the elevating motor 11, the cam plate 15 is rotated, and the elevating block 6 is moved to an upper side separated from the chassis 2 as indicated by an arrow N in FIG. That is, when the disc cartridge 101 is inserted into the cartridge holder 28 to a predetermined position, the spindle motor 3 is operated to insert the disc 1 into the disc 1.
The elevating motor 11 operates to move from a non-rotational drive position separated from 02 to a rotation drive position which is on the side of the disk 102 with respect to the non-rotational drive position. When the elevating block 6 is operated to move up to the rotational driving position, the disc hub 106 of the disc 102 is placed on the disc table 4 and the cartridge 108 is moved to the above-mentioned position, as shown in FIG. It is placed on the cartridge positioning member 67. At this time, the tip side of the spindle shaft 5 has the center hole 10
It is fitted in 7. Further, at this time, in the cartridge 108, a positioning contact concave portion which is a peripheral portion of the chucking opening 109 is brought into contact with each of the contact protrusions 68, 68, 68 of the cartridge positioning member 67.

By mounting the cartridge 108 on the cartridge positioning member 67 in this way, the cartridge pressing spring portions 31, 32, 3 are placed.
Against the biasing forces of 3, 34, the holder portions 29, 30
The chassis 2 is moved in a direction away from the chassis 2. Further, the disc 102 is separated from the inner wall portion of the cartridge 108 by placing the disc hub 106 on the disc table 4 in this manner. In the disk 102, since the distance between the upper surface of the disk table 4 and the projecting ends of the abutting projections 68, 68, 68 of the cartridge positioning member 67 is always constant, the disk 108 in the cartridge 108 is the same. Held in a fixed position relative to. Also,
The disc hub 106 is held in pressure contact with the disc table 4 by an attraction force of a magnet provided on the disc table 4.

In this state, when the spindle motor 3 is driven, the disc 102 is rotated together with the disc table 4. The disk 102 is rotated at a predetermined angular velocity by the spindle motor 3. The optical pickup device including the optical block portion 18 and the lens bobbin block portion 17 and the magnetic head device 66 are
An information signal is written by applying a magnetic field and irradiating a light beam to the disk 102 that is rotated by the spindle motor 3, and an information signal already written by irradiating the light beam. Is read.

In this recording and / or reproducing apparatus, when the elevating block is moved down to the side of the chassis 2 as indicated by arrow M in FIG. 6, the disc cartridge 101 is moved to the arrow in FIG. As indicated by O, the ejection operation is performed to the front side of the cartridge holder 28 by the urging force of the tension coil spring 43a. Also,
When the disc cartridge 101 is ejected to the front side of the central portion of the cartridge holder 28 shown in FIG. 9, the shutter opening rotation lever 37 is returned to the initial position by the torsion coil spring 39, and The shutter member 103 closes the openings 104 and 110, as shown in FIG.

By the way, the cam portion of the cam plate 15 serves to hold the disk 102 on the disk table 4 as described above, and the height position of the disk cartridge 101 after the holding operation is completed. And a part for adjusting. The cam plate 15 has a cam shape of a portion for performing the holding operation so as to rapidly move the elevating block 6 to a predetermined height.
The cam shape of the portion for adjusting the height position of the disc cartridge 101 is shaped so as to move the elevating block 6 within a minute distance.

In the state where the disc table 4 holds the disc 102, the lifting motor 11 is
It is possible to perform an accurate raising / lowering operation with respect to the raising / lowering block 6 with respect to a minute movement amount of, for example, 1 μm unit. Therefore, in this recording and / or reproducing apparatus, the disc table 4 is used as the disc 1
While holding 02, the elevating motor 11 moves the elevating block 6 up and down by a small amount, so that the disc 102 can be adjusted so as to always be at a predetermined position with respect to the objective lens 55.

That is, in this recording and / or reproducing apparatus, the elevating motor 1 is operated based on the so-called focus error signal obtained from the optical pickup apparatus.
By controlling the drive of No. 1, it is possible to perform a so-called focus servo operation in which the signal recording surface of the disk 102 is always on the focus of the light beam formed by the objective lens 55. Therefore, this record and / or
Alternatively, in the optical pickup device that constitutes the reproducing apparatus, it is not necessary to provide a so-called objective lens driving device that moves and operates the objective lens 55 in the optical axis direction, that is, an actuator.

In the optical pickup device in this recording and / or reproducing apparatus, the disc 10 is used.
The so-called tracking servo that causes the light beam emitted from the objective lens 55 to follow the periodic movement of the recording track in the radial direction of the disc 102 due to the eccentricity of the disc 102 due to the rotation of 2.
The galvano mirror 53 deflects the light beam incident on the beam. However, this tracking servo is performed by the pickup guide shafts 63, 64 of the lens bobbin block 60.
By moving the lens bobbin block 60 in the radial direction of the disc 102 by moving the lens bobbin block 60 in a radial direction, or by supporting only the objective lens 55 via a so-called objective lens driving device. It can be carried out.

[0067]

As described above, in the shutter opening mechanism according to the present invention, the first shutter opening rotatably mounted on the main surface portion of the cartridge holder into which the disk cartridge is inserted and operated via the support shaft. The shutter opening pin attached to the tip side of the second shutter opening lever slidably supported by the lever is provided on one side of the shutter member of the disk cartridge when the disk cartridge is inserted into the cartridge holder. Abutting, pressed by the cartridge of the disk cartridge in accordance with the operation of inserting the disk cartridge into the inner side of the cartridge holder, and along the arcuate portion of the guide slit formed in the main surface portion of the cartridge holder. The shutter member is moved to the other side by moving on an arcuate locus centered on the spindle. Is moved, then, it is moved along the straight portion of the guide slit.

Therefore, the shutter opening mechanism can complete the movement of the shutter member in the middle of the movement process of the cartridge in the insertion operation of the disc cartridge.

Further, the shutter opening pin is the first
Is not only rotated around the support shaft together with the shutter release lever, but is also moved along a straight line together with the second shutter release lever, so that the cartridge is always moved smoothly following the movement of the cartridge.

That is, according to the present invention, the shutter member of the disk cartridge can be opened even during the insertion operation of the disk cartridge.
It is possible to provide a shutter opening mechanism in which there is a possibility that the smooth insertion operation of the disc cartridge is disturbed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a structure of a recording and / or reproducing apparatus having a shutter opening mechanism according to the present invention and a disk cartridge mounted in the recording and / or reproducing apparatus with a part thereof broken away. It is a figure.

FIG. 2 is a perspective view showing a state in which the disk cartridge is mounted on the recording and / or reproducing apparatus, as seen through.

FIG. 3 is an enlarged plan view showing a partially broken structure of the optical pickup device of the recording and / or reproducing apparatus.

FIG. 4 is an enlarged side view showing a state in which a disc cartridge insertion operation is started with respect to the recording and / or reproducing apparatus, with a part thereof broken away.

FIG. 5 is an enlarged side view showing a state in which the operation of inserting the disc cartridge into the recording and / or reproducing apparatus is completed, with a part thereof broken away.

FIG. 6 is an enlarged side view showing a state in which a holding operation for a disc cartridge inserted in the recording and / or reproducing apparatus is completed, with a part thereof broken away.

FIG. 7 is an enlarged exploded perspective view showing a configuration of a shutter opening mechanism according to the present invention.

FIG. 8 is an enlarged plan view showing a configuration of the shutter opening mechanism in an initial state.

FIG. 9 is an enlarged plan view showing a state where the shutter opening mechanism opens the shutter member of the disc cartridge.

FIG. 10: The recording and / or recording of the disc cartridge
Alternatively, it is an enlarged plan view showing the shutter opening mechanism in a state in which the inserting operation to the reproducing device is completed.

FIG. 11 is a perspective view from the bottom side showing the configuration of the disc cartridge mounted in the recording and / or reproducing apparatus.

FIG. 12 is a perspective view from the bottom side showing a state where the shutter member of the disc cartridge mounted in the recording and / or reproducing apparatus is opened.

[Explanation of symbols]

 28: Cartridge holder 36: Guide slit 37: Rotating lever 38 for opening the shutter・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Spindle 39 ・ ・ ・ ・ ・ ・ ・ ・ ・ Torsion coil spring 41 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Shutter release pin 43 ・ ・Shutter release slider 43a Extension coil spring 101 Disc cartridge 102・ ・ ・ Disk 103 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Shutter member 108 ・ ・ ・ ・ ・ ・ ・ Cartridge

Claims (1)

[Claims] 1. A recording disk, a cartridge in which a portion of the recording disk is exposed to the outside through an opening so as to be rotatably accommodated, and a shutter member movably supported by the cartridge to open and close the opening. A cartridge holder into which a disk cartridge having the above is inserted and operated, a first shutter release lever rotatably attached to a main surface portion of the cartridge holder via a support shaft, and a slide on the first shutter release lever. A second shutter release lever that is supported movably and has a shutter release pin attached to the front end side, and a main surface of the cartridge holder that has an arcuate portion and a straight portion centered on the support shaft. And a guide slit through which the shutter opening pin is inserted to allow the shutter opening pin to enter the cartridge holder, Urging means for elastically urging the first and second shutter release levers to bring the shutter release pin to the initial position which is the starting end portion of the guide slit, When it is inserted into the cartridge holder, it abuts on one side of the shutter member and is pressed by the cartridge as the disc cartridge is inserted into the inside of the cartridge holder. A shutter opening mechanism that moves along an arcuate locus centered on the spindle along the arcuate portion to move the shutter member in the other side direction, and then moves along the straight portion of the guide slit. ..