JPH05135465A - Disk cartridge - Google Patents

Abstract

PURPOSE:To stably perform a positioning by using a 1st positioning reference part provided at the circumferential side of opening part for chucking or a pair of 2nd positioning reference parts provided at the circumferential side of a pair of positioning holes. CONSTITUTION:When an elevating block 106 is operated for elevating to a rotation driving position, a cartridge 8 is positioned by abutting a 1st positioning reference face part 5 which is the circumferential part of the opening part 9 for chucking, to an abutting protrusion 168 of a cartridge positioning member 167. A positioning pin 170 is the stepped pin forming a step-shaped diameter expanded part at the tip side, then by abutting the tip side part of this diameter expanded part to the 2nd positioning reference face parts 18a, 19a, positioning of the cartridge 8 is attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge having a recording disk housed in the cartridge.

[0002]

2. Description of the Related Art Conventionally, a disk cartridge has been proposed in which a recording disk such as an optical disk or a magneto-optical disk is housed in a cartridge. The recording disk has a disk-shaped disk substrate and a signal recording portion formed on the main surface of the disk substrate. In this recording disk, the central portion is a chucked portion, and the peripheral side of the chucked portion is a signal recording area. The cartridge is formed in a thin housing so that the recording disk can be housed therein, and a recording / reproducing opening for exposing a part of the signal recording area to the outside on the main surface and the chucked portion. Has an opening for chucking that faces the outside.

This disc cartridge is used by positioning the cartridge at a predetermined position in a recording and / or reproducing apparatus configured to record and / or reproduce an information signal by using the disc cartridge.

The recording and / or reproducing apparatus includes a loading mechanism for transporting the disc cartridge to a predetermined mounting position, a rotation drive mechanism for holding and rotating the recording disc of the disc cartridge at the mounting position, and 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, in the disc cartridge moved and operated in the direction of approaching the chassis, the cartridge is positioned, and the recording disc is held by the rotation drive mechanism arranged on the chassis. .. The positioning of the cartridge is performed by bringing a positioning reference surface portion formed on an outer surface portion of the cartridge into contact with a positioning member such as a positioning pin arranged on the chassis.

The pickup device is arranged on the chassis so as to face the main surface portion of the recording disk, which is rotated 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 and operated in the radial direction of the recording disk and the recording disk is rotationally operated, the pickup device is operated through the recording / reproducing opening formed in the main surface of the cartridge. Information signals can be written and / or read over substantially the entire signal recording surface of the recording disk.

[0008]

By the way, in order to reduce the size and simplification of the device structure of the recording and / or reproducing apparatus, the applicant of the present invention has not provided the above-mentioned disc loading mechanism, There is proposed a recording and / or reproducing apparatus configured to hold the disc cartridge by moving and operating a rotation drive mechanism. That is, in this recording and / or reproducing apparatus, the disc cartridge is held by a rotary drive mechanism that is inserted and operated in the direction along the main surface and then moved and operated in the direction close to the disc cartridge.

The rotary drive mechanism has a spindle motor having a drive shaft on which a disk table is attached, and a positioning member arranged around the spindle motor. In the disc cartridge, the recording disc is held by the disc table, and the cartridge is positioned and held by the positioning member.

In the disk cartridge used in this recording and / or reproducing apparatus, the peripheral side portion of the chucking opening is used as a positioning reference surface portion abutted by the positioning member. This is because if a positioning pin or the like arranged at a position separated from the spindle motor is moved and operated, the structure of the recording and / or reproducing apparatus becomes complicated.

On the other hand, a disk cartridge for use in such a recording and / or reproducing apparatus is difficult to use in a recording and / or reproducing apparatus having a conventional disk loading mechanism. That is, when the disk cartridge having the positioning reference surface portion provided on the peripheral side portion of the chucking opening is moved and the positioning pin is brought into contact with the positioning reference surface portion, the cartridge is positioned. There is no choice but to make the shape of the positioning pin complicated. Further, since the chucking opening is provided in the central portion of the main surface portion of the cartridge, the cartridge is stably held only by the positioning reference surface of the peripheral side portion of the chucking opening. I can't.

Therefore, the present invention is proposed in view of the above-mentioned circumstances, and is used for a recording and / or reproducing apparatus in which a rotary drive mechanism is moved and operated and the structure is simplified. It is also an object of the present invention to provide a disc cartridge in which the cartridge can be positioned in a stable state in a recording and / or reproducing apparatus in which the cartridge holder is moved.

[0013]

In order to solve the above problems and achieve the above objects, a disk cartridge according to the present invention includes a recording disk, a cartridge rotatably accommodating the recording disk, and a main part of the cartridge. A chucking opening formed on a surface portion of the disk so as to expose a chucked portion of the disk to the outside, and a first positioning reference provided on an outer side surface of the cartridge on a peripheral side of the chucking opening. The cartridge includes a surface portion and a pair of second positioning reference surface portions provided on the outer side surface of the cartridge and around the pair of positioning holes provided on the main surface of the cartridge.

[0014]

In the disk cartridge according to the present invention, the cartridge in which the recording disk is rotatably accommodated is positioned by the first positioning reference surface portion provided on the peripheral side of the chucking opening formed in the main surface portion. In addition to being obtained, the positioning can be performed by the pair of second positioning reference surface portions provided on the peripheral side of the pair of positioning holes provided in the main surface portion.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 5, the disc cartridge 1 according to the present invention is configured to rotatably accommodate a disc 2 serving as a recording disc in a cartridge 8. The disk 2 is a magneto-optical disk and 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. , Configured in a disc shape. A hub mounting hole is provided in the center of the disc 2. A disc hub 6 serving as a chucked portion for attaching the disc 2 to the disc table 104 of the recording and / or reproducing apparatus is attached to the hub attachment hole as described later. The disk hub 6 is formed of a magnetic material such as metal into a substantially disk shape, is substantially concentric with the disk 2, and is attached to the disk 2 by means such as adhesion or welding. A center hole 7 is formed at the center of the disc hub 6 so that its center coincides with the center of curvature of a recording track formed in a spiral shape on the signal recording layer.

The cartridge 8 is formed in a thin casing capable of accommodating the disc 2 by coupling the upper and lower halves 8a and 8b which are paired with each other by butting. As shown in FIG.
As shown in FIG. 3, an upper recording / reproducing opening 4 is provided so that one main surface portion of the disk 2 faces the outer side over the inner and outer circumferences. Further, the lower main surface portion of the cartridge 8 is provided with a lower recording / reproducing opening 10 for exposing the other main surface portion of the disk 2 to the outer side over the inner and outer circumferences. The lower recording / reproducing opening 10 is formed at a position opposite to the upper recording / reproducing opening 4 and has substantially the same size as the upper recording / reproducing opening 4.

A chucking opening 9 for exposing the disk hub 6 to the outside is provided at the center of the lower main surface of the cartridge 8. Then, as will be described later, the first positioning reference surface portion 5 for contacting the contact protrusion 168 of the cartridge positioning member 167 of the recording and / or reproducing apparatus with the periphery of the chucking opening 9. Are formed. The first positioning reference surface portion 5 is formed as a bottom surface portion of a stepped concave portion formed around the chucking opening portion 9.

At the four corners of the lower main surface of the cartridge 8, front side positioning holes 18, which are paired with each other,
18 and rear side positioning holes 19 and 19 are provided.
The front side positioning holes 18, 18 are formed as circular holes. Further, the rear side positioning holes 19, 19
Is formed as an oval hole whose longitudinal direction is the direction toward the front side positioning holes 18, 18. The periphery of each of the positioning holes 18, 18, 19 and 19 is made flat and serves as second positioning reference surface portions 18a, 18a, 19a and 19a, respectively.

A shutter member 3 is attached to the cartridge 8. This shutter member 3
The cartridge 8 is formed as a U-shaped member that sandwiches the upper and lower main surface portions of the front edge side portion of the cartridge 8 by means such as injection molding and bending by using a synthetic resin or a metal plate. That is, the shutter member 3 includes an upper shutter plate portion 3a attached to the upper main surface portion of the cartridge,
The lower shutter plate portion 3b is opposed to the upper shutter plate portion in parallel with each other, and the connecting plate portion 3c that connects the base end sides of these shutter plate portions is integrally configured. .. Then, the shutter member 3 has the connecting plate portion 3
c is attached to the front end face of the cartridge 8, and the connecting plate 3c is slidably supported by the cartridge 8 along the front end face. Openings 12 and 11 are formed in the shutter plate portions 3a and 3b, respectively, at positions closer to one side of the connecting plate portion 3c in the slidable direction with respect to the cartridge 8.

As shown in FIG. 1, when the shutter member 3 is at the one side position with respect to the cartridge 8, the other side portion of each of the shutter plate portions 3a and 3b is connected to each of the recording / reproducing openings 4. , 10 to close the recording / reproducing openings 4, 10.

When the shutter member 3 is slid to the other side position with respect to the cartridge 8 as shown by the arrow S in FIGS. 2 and 4, as shown in FIGS. The parts 12 and 11 are made to correspond to the respective recording / reproducing openings 4 and 10 and the recording / reproducing openings 4 and 10 are opened.

The shutter member 3 is provided with a biasing spring (not shown) provided in the cartridge 8,
The recording and reproducing openings 4 and 10 are elastically urged toward one side to close them.

The front end surface portion of the cartridge 8
The shutter opening pin fitting portion 13 is located at one side of the connecting plate portion 3c when the recording and reproducing openings 4 and 10 are closed.

The connecting plate portion 3c is narrower than the other portions on both side portions corresponding to the openings 12 and 11 of the shutter plate portions 3a and 3b. The width is smaller than the thickness. That is, the openings 12, 11 of the shutter plate portions 3a, 3b are
Are formed so as to hang on the connecting plate portion 3c. Further, the recording / reproducing opening 4, which is a portion of the cartridge 8 facing the side edge of the disc 2.
10, that is, the opening portions 12 and 11 when the recording and reproducing opening portions 4 and 10 are opened.
The front edge portion 16 of the cartridge 8 that faces the outside through the
Is thinner than the thickness of the disc 2.

Further, a locked recess 17 is provided on the other side edge of the cartridge 8. The locked recessed portion 17 is a main surface portion of the lower half 8b, that is,
As a concave portion opened to the bottom surface side of the cartridge 8, it is provided at a substantially central position of the other side edge portion of the cartridge 8.

A recording and / or reproducing apparatus for recording and / or reproducing information signals using the disc cartridge according to the present invention has a chassis 102 at the bottom as shown in FIGS. 5 and 6. It is configured to have a housing 101. The housing 101 is formed so that the front surface side is open. The open front side of the housing 101 is closed by a front panel 124. The front panel 124 has a slit-shaped disc cartridge insertion hole 125 in which the disc cartridge 1 can be inserted. This disc cartridge insertion hole 125 is
It can be opened and closed. The insertion hole cover 126 is formed in an elongated rectangular plate shape corresponding to the disc cartridge insertion hole 125, and both end portions of the rotary shaft 127 attached along the longitudinal direction are formed in the disc cartridge insertion hole 125. It is rotatably supported in the inner part. The insertion hole cover body 126 opens and closes the disk cartridge insertion hole 125 by being rotated around the rotation shaft 127.

A chassis 1 which is a bottom plate portion of the housing 101.
On 02, a signal recording / reproducing unit including a rotation driving unit, an optical head unit, a magnetic field generating unit, and the like is configured.

That is, on the chassis 102, a spindle motor 103 which constitutes a rotation driving means for rotating the disk 2 of the disk cartridge 1 is provided.
Are arranged. The spindle motor 103 is attached to a lifting block 106 that constitutes loading means. The elevating block 106 is formed in a substantially annular shape, and the spindle motor 103 is fitted in the central hole 109 to support the spindle motor 103. The lifting block 106 has a plurality of shaft insertion holes 108, 1 provided with sliding bearings.
08 and 108, and the shaft insertion hole 10
By inserting a plurality of motor guide shafts 107, 107, 107, which are planted in the chassis 102, into the motor guide shafts 107, 10 as shown by arrows M and N in FIG.
It is movably supported in the contacting / separating direction with respect to the chassis 102 along the lines 7 and 107. That is, the spindle motor 103 is movable in the contacting / separating direction with respect to the chassis 102. The spindle motor 103 is supported with a spindle shaft 105 integrated with a drive shaft being substantially perpendicular to the chassis 102. The tip end side of the spindle shaft 105 faces the upper side of the chassis 102.

A disk table 104 is attached to the drive shaft of the spindle motor 103 so as to surround the periphery of the tip end side of the spindle shaft 105. The disc table 104 is formed on a disc having substantially the same diameter as the disc hub 6 so that the disc hub 6 attached to the disc 2 can be placed thereon. An annular magnet is integrally attached to the disc table 104 between the spindle shaft 105 and the peripheral portion of the disc table 104. This magnet is for attracting the disc hub 6 of the disc 2 placed on the disc table 104.

A substantially annular cartridge positioning member 167 is attached to the upper surface of the elevating block 106 so as to be on the peripheral side of the disk table 104. This cartridge positioning member 167
Has at least three abutting protrusions 168 formed on the upper surface thereof. The plane determined by the projecting end portions of the contact protrusions 168 is larger than the surface of the disc table 104 on which the disc hub 6 is placed and the chassis 102.
It is on the side and is parallel to the surface of the disk table 104 on which the disk hub 6 is placed.

Then, on the chassis 102, at a position on the front side of the spindle motor 103, an elevating motor 111 for moving the elevating block 106 into and out of the chassis 102 together with the disk table 104 and the like, that is, an elevating operation. Are arranged. The elevating motor 111 is supported by a supporting member attached to the chassis 102 so that the drive shaft is parallel to the chassis 102, and one end of the drive shaft is arranged so as to face the elevating block 106. ing. This lifting motor 1
A cam plate 115 having an outer peripheral edge portion serving as a cam portion is attached to one end side of the drive shaft of 11. This cam plate 115
An engaging pin 106a, which is erected on the side of the elevating block 106, is placed and engaged with the cam portion of the. When the cam plate 115 is rotated by the lift motor 111, the lift block 106 causes the cam plate 115 to move.
Raised and lowered. The lift motor 111 is a so-called stepping motor, and is configured to be able to accurately control the rotational angle position.

The elevating block 106 is elastically biased toward the chassis 102 by a tension spring 110 stretched between the elevating block 106 and the chassis 102, and the engaging pin 106a. Is brought into pressure contact with the cam plate 115 so as to abut and engage with the cam plate 115.

The lifting motor 111 has the other end of the drive shaft exposed to the outside through a drive shaft operating hole 113 formed in the front panel portion 124. As shown in FIG. 6, the drive shaft operating hole 113 is for inserting the manual eject tool 201 into the housing 101 and rotating the drive shaft of the elevating motor 111 manually.

On the chassis 102, an optical pick-up device, which is an optical head means composed of an optical block portion 118 and an objective lens driving device portion 117, is arranged at a position on the rear side of the spindle motor 103. This optical pickup device is for irradiating the disc 2 mounted and mounted on the disc table 104 with a light beam for writing and reading an information signal.

As shown in FIG. 7, the optical block section 18 accommodates a laser diode 150 as a light source and a plurality of optical devices for guiding a light beam emitted from the laser diode 150 in a block as a lens barrel. It has been configured. That is, this optical block unit 11
In FIG. 8, the divergent light beam emitted from the laser diode 150 is incident on the collimator lens 151, and is made into a parallel light beam by the collimator lens 151. The parallel light beam that has passed through the collimator lens 151 is incident on the galvano mirror 153 via the beam splitter prism 152. The galvano mirror 153 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 153 is emitted from the optical block unit 118 and is incident on the objective lens driving device unit 117.

Then, the objective lens drive unit 117
Has a frame and is provided with a pair of guide shafts 163 and 164 in the frame. The guide shafts 163 and 164 are parallel to each other and supported by the frame to be parallel to the chassis 102. The lens bobbin block 16 is provided between the guide shafts 163 and 164.
0 is set. This lens bobbin block 160
Can be moved along the guide shafts 163 and 164 in the direction along the chassis 102. That is, three guide rollers 161 and 16 are provided on both sides of the lens bobbin block 160, which are the sides facing the guide shafts 163 and 164.
1, 161, 162, 162, 162 are provided. At least one of the guide rollers 161, 161, 161 on one side of the lens bobbin block 160 is supported by a support shaft projecting obliquely upward from the lens bobbin block 160 in the direction of 45 °, and the other ones. It is supported by a support shaft projecting in the direction of 45 ° obliquely below 160. Then, these guide rollers 161, 16
1, 161 can roll on the guide shaft 163 so as to sandwich the guide shaft 163. The guide rollers 162, 162, 162 on the other side of the lens bobbin block 160 are similar to the guide rollers 163, 163, 163 on the one side.
At least one is supported by a support shaft projecting obliquely upward 45 ° from the lens bobbin block 160, and the other is supported by a support shaft projecting obliquely downward 45 ° from the lens bobbin block 160. .. The guide rollers 162, 162, 162 sandwich the guide shaft 164 so as to sandwich the guide shaft 164.
It is possible to roll over.

The lens bobbin block 160
Movable direction, that is, each of the guide shafts 16
The axial direction of 3,164 is the direction of contact and separation with respect to the spindle motor 103, as indicated by the arrow L in FIGS. 5 and 7. In addition, the lens bobbin block 160
Is operated to be moved along the guide shafts 163 and 164 by a feed motor 165 arranged in the frame of the objective lens driving device section 117. The feed motor 165 is composed of a so-called linear motor.

An objective lens 155 is provided on the upper surface of the lens bobbin block 160. The objective lens 155 is fixedly attached to the lens bobbin block 160. In addition, in the lens bobbin block 160, the parallel light beam incident from the optical block unit 118 is reflected to reflect the objective lens 1
A reflection mirror 154 for making the light incident on 55 is arranged.
That is, the parallel light beam that has entered the objective lens drive unit 117 from the optical block unit 118 enters the objective lens 155 through the reflection mirror 154 to be a focused light beam.
The chassis 102 is parallel to the spindle shaft 105.
It is ejected to the upper side, which is the direction of further separation.

The light beam emitted from the objective lens 155 and reflected by the disc 2 on the disc table 104 enters the objective lens 155 again to be a parallel light beam, and reaches the reflection mirror 154.
The reflection mirror 154 reflects the light beam that is re-incident on the objective lens 155 and reaches the reflection mirror 154, and returns it to the optical block unit 118 side. The optical block unit 118 has a built-in photodetector and the like for detecting the light beam returned to the optical block unit 118.
That is, the light beam returned from the objective lens drive unit 117 to the optical block unit 118 returns to the beam splitter prism 152 via the galvano mirror 153. Here, the beam splitter prism 152 does not return the light beam returned from the galvano mirror 153 to the collimator lens 151 side,
The light is incident on the Wollaston prism 156. The Wollaston prism 156 is configured by joining two right-angle prisms formed of a material having optical anisotropy, such as calcite and quartz, so that their optical axes are orthogonal to each other. This Wollaston Prism 156
The light beam incident on is split into two linearly polarized lights having vibration planes orthogonal to each other. Then, the light beam that has passed through the Wollaston prism 156 passes through the condenser lens 157 and the multi-lens 158 and is received by the photodiode 159 which is a photodetector. The condenser lens 157 is a convex lens. The multilens 158 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 155 between the focal point of the light beam focused by the objective lens 155 and the signal recording surface of the disk 2 is detected based on the photodetection output from the photodiode 159. Focus error signal indicating the amount of deviation in the direction, the objective lens 1 between the converging point and the recording track formed on the signal recording surface.
It is possible to obtain a tracking error signal indicating the shift amount of 55 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.

The lens bobbin block 160
As shown in FIGS. 5 and 8, a magnetic head device 166 serving as a magnetic field generating means is attached via a magnetic head supporting arm 119. This magnetic head device 166
Is for applying an external magnetic field for writing an information signal to the disk 2. The magnetic head support arm 119 is supported at the base end side by the lens bobbin block 160, is bent in the middle, and the tip end side faces the objective lens 155. The magnetic head device 166
Is attached to the tip end side of the magnetic head support arm 119 and faces the objective lens 155. The magnetic head device 166 and the objective lens 155 face each other at an interval equal to the sum of the thickness of the disk 2 and the working distance of the objective lens 155. The working distance of the objective lens 155 is the distance from the tip of the objective lens 155 to the focal point of the objective lens 155.

A cartridge holder 128 is arranged inside the outer casing 101 so as to be located above the chassis 102. This cartridge holder 1
28 is formed in a substantially flat plate shape having a pair of holder portions 129 and 130 on both sides by means such as bending a metal plate. The pair of holder parts 129, 130
Both sides of the cartridge holder 128 are bent toward the chassis 102, and the side edges of these two sides are bent so as to be parallel to the chassis 102 so that the cartridge holder 128 has a hook shape in cross section. Made and formed. Both sides of the cartridge holder 128 are supported by the inner wall of the outer casing 101, and the chassis 1
It is arranged so as to be parallel to 02.

The cartridge holder 128 is formed between the holder portions 129 and 130 so that the disc cartridge 1 can be inserted and operated from the front side. The disc cartridge 1 inserted between the holder portions 129 and 130 is held while being supported on both sides by the holder portions 129 and 130.
The cartridge holder 128 is arranged so that its front portion is located behind the disc cartridge insertion hole 125. That is, the disc cartridge 1 inserted through the disc cartridge insertion hole 125 is inserted between the holder portions 129 and 130 of the cartridge holder 128.

On the upper surface of the cartridge holder 128, the cartridge pressing spring portion 13 is provided at a position corresponding to the four corners of the cartridge 8 of the disk cartridge 1 inserted between the holder portions 129 and 130.
1, 132, 133, and 134 are provided. These cartridge pressing spring portions 131, 132, 133, 13
No. 4 is formed by forming a U-shaped cutout portion on the upper surface of the cartridge holder 128 and bending the inner portion of the cutout portion so as to bulge toward the chassis 102 side. .. These cartridge pressing spring parts 1
31, 132, 133, and 134 are the holder portions 12 described above.
Disk cartridge 1 inserted between 9 and 130
Is pressed to the chassis 102 side.

On the upper surface of the cartridge holder 128, as shown in FIGS. 5, 11 and 12, a shutter opening rotation lever 137 for opening the shutter member 3 of the disc cartridge 1 is operated. Is installed. The shutter opening rotation lever 137 is rotatably supported on the base end side thereof by a substantially central portion on the front side of the cartridge holder 128 via a support shaft 138. The tip end side of the shutter opening rotation lever 137 is directed toward one side of the cartridge holder 128.

Then, the shutter opening rotary lever 1
A shutter opening slider 143 is slidably attached to 37. This shutter release slider 143
Is formed in a substantially elongated plate shape and has a slide guide slit 143a along the longitudinal direction. The shutter opening slider 143 has a pair of guide pins 142, 142 set up on the shutter opening turning lever 143.
Is inserted into the slide guide slit 143b and is slidably supported in the arrangement direction of the guide pins 142, 142.

On the tip end side of the shutter opening slider 143, a shutter opening pin 141 is provided.
It is planted so that it hangs down to the side. The shutter opening pin 141 is used for the cartridge holder 1
It is inserted into a guide slit 136 provided on the upper surface of 28, and enters between the holder portions 129 and 130 via the guide slit 136. In the guide slit 136, a portion extending from the front side portion of the cartridge holder 128 to the central portion of the cartridge holder 128 is an arc-shaped portion centered on the supporting shaft 138, and the guide slit 136 is formed from the central portion of the cartridge holder 128. A portion of the cartridge holder 128 that extends to the rear side is formed as a linear portion that extends in the front-rear direction.

The shutter opening pin 141 moves within the arcuate portion of the guide slit 136 when the shutter opening rotation lever 137 rotates. Further, when the shutter opening pin 141 is formed in the central portion of the cartridge holder 128 by the rotation of the shutter opening rotating lever 137, the shutter opening slider 143 is moved to the shutter opening rotating lever 137. By sliding the guide slit 136, the guide slit 136 is moved in the linear portion.

The rotary lever 1 for opening the shutter
A torsion coil spring 139, which serves as an urging means in which a coil portion is supported by the support shaft 138, is rotationally urged in a direction in which the shutter opening pin 141 shown by an arrow A in FIG. ing. This torsion coil spring 139
Is a rotary lever 1 for opening the shutter.
37 is locked to the locking portion 137a, and the other arm portion is locked by the locking claw 140 provided on the cartridge holder 128.
It is locked to. Further, the shutter opening slider 1
Reference numeral 43 designates the shutter opening pin 141 indicated by the arrow B in FIG. 12 by means of the tension coil spring 143a.
It is elastically biased in the direction of approaching 38. One end of the tension coil spring 143a is locked to the locking portion 143c on the base end side of the shutter opening slider 143,
The other end is locked by a locking claw 137b provided on the shutter opening rotation lever 137.

In the initial state where the disc cartridge 1 is not inserted into the cartridge holder 128, the shutter opening pin 141 is positioned at the initial position where it abuts on the front end of the guide slit 136.

Then, this recording and / or reproducing apparatus is
It has a control device (not shown). This control device is configured to have a predetermined electronic circuit so as to control the operations of the spindle motor 103, the optical pickup device, the magnetic head device 166, etc. 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 103 and the lifting / lowering device. The detection signal for detecting the rotation speed and the rotation angle position of the motor 111, the disk cartridge 1
A signal or the like that detects the completion of the insertion operation into the cartridge holder 128 is sent. In this recording and / or reproducing apparatus, a tracking servo operation by driving the galvano mirror 153 in the optical pickup apparatus, a focus servo operation by driving and controlling the elevating motor 111, and a rotation speed of the spindle motor 103. 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 1 according to the present invention in the recording and / or reproducing apparatus constructed as described above, first, the disc cartridge 1 is
An insertion operation is performed through the disc cartridge insertion hole 125, and the disc cartridge is held between the holder portions 129 and 130. At this time, the disc cartridge 1 is inserted while the shutter member 3 is on the front side, as indicated by an arrow J in FIGS. 2, 5, and 8.

Then, as shown in FIG. 12, the lower end portion of the shutter opening pin 141 is the cartridge 8
The front end face portion of the shutter member 3 of the connecting plate portion 3c
Of the shutter opening pin fitting portion 13 in the vicinity of one end thereof. Then, the disc cartridge 1
Is further inserted into the inside of the holder portions 129 and 130, the shutter opening pin 141 is pressed by the cartridge 8, and the shutter opening rotation lever 137 is attached to the torsion coil spring 39. While rotating against the power, as indicated by arrow C in FIG.
It moves rearward along the arcuate portion of the guide slit 136.

The shutter opening pin 141 is
As shown in FIG. 13, when the cartridge holder 128 is moved to a substantially central portion, the lower end portion presses the connecting plate portion 3c of the shutter member 3 to cause the shutter member 3 to perform the recording / reproducing operations. The opening portions 4 and 10 are opened. When the shutter member 3 opens the recording / reproducing openings 4 and 10, one side portion of the connecting plate portion 3c of the shutter member 3 is positioned substantially at the center of the front side portion of the cartridge 8. become. Then, as shown in FIGS. 2, 4, 5, and 8, the front edge portion 16 of the cartridge 8 is exposed to the outside through the openings 12 and 11 of the shutter plate portions 3a and 3c. Becomes

The disk cartridge 1 inserted further toward the rear side is pressed and supported by the cartridge pressing spring portions 131, 132, 133 and 134 on the chassis 102 side between the holder portions 129 and 130. In this state, the rearward movement is performed. Then,
First, the disc cartridge 1 includes the connecting plate portion 3
The narrow portion of c is passed between the objective lens 155 and the magnetic head device 166, and then the leading edge portion 16 of the cartridge 8 is passed between the objective lens 155 and the magnetic head device 166. Then, as shown in FIG. 9, the disk 2 is inserted between the objective lens 155 and the magnetic head device 166. At this time, since the distance between the objective lens 155 and the magnetic head device 166 is wider than the thickness of the disc 2, the disc 2 contacts the objective lens 155 or the magnetic head device 166. Without being inserted between the objective lens 155 and the magnetic head device 166.

At this time, the shutter opening pin 1
When 41 is pressed by the cartridge 8, the shutter opening slider 143 slides with respect to the shutter opening rotating lever 137 against the biasing force of the tension coil spring 143a, as shown in FIG. To be done. As shown by the arrow D in FIG. 14, the shutter opening pin 141 is moved in the linear portion of the guide slit 136 toward the rear side, that is, in the direction away from the support shaft 138.

At this time, the elevating block 106
Is urged to move to the chassis 102 side by the tension coil spring 110 and positioned at the initial position.

When the disc cartridge 1 is inserted to a predetermined insertion completion position, the disc table 104 and the disc hub 6 are substantially coaxial and face each other, as shown in FIG. It becomes a state. At this time, the fact that the disc cartridge 1 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 1 by optical means or other various means. It is configured.

The control device, which receives the detection signal from the detection device, drives the lifting motor 111.
By driving the lifting motor 111, the cam plate 115 is
Is rotated, and as shown by an arrow N in FIG. 10, the elevating block 106 is moved to an upper side separated from the chassis 102. That is, when the disc cartridge 101 is inserted into the cartridge holder 128 to a predetermined position, the spindle motor 103 moves from the non-rotational drive position separated from the disc 2 to the disc 2 above the non-rotational drive position. The lifting / lowering motor 111 is operated to move to the rotation drive position which is the side. When the elevating block 106 is moved up to the rotational drive position, the disc hub 6 of the disc 2 is placed on the disc table 104 and the cartridge 8 is placed on the disc 8 as shown in FIG. It is placed on the cartridge positioning member 167. At this time, the tip side of the spindle shaft 105 is
It is fitted in the center hole 7. Further, at this time, the cartridge 8 has the first positioning reference surface portion 5 which is the peripheral portion of the chucking opening portion 9 and the contact protrusions 168, 16 of the cartridge positioning member 167.
It is positioned by abutting on 8, 168.

By mounting the cartridge 8 on the cartridge positioning member 167 in this manner, the cartridge pressing spring portions 131, 132, 1 are placed.
Against the biasing forces of 33 and 134, the holder portions 12
9 and 130 are moved in a direction away from the chassis 102. The disc 2 is separated from the inner wall portion of the cartridge 8 by placing the disc hub 6 on the disc table 104 in this manner. The disc 2 is the disc table 1
Since the distance between the upper surface of 04 and the abutting ends of the abutting protrusions 168, 168, 168 of the cartridge positioning member 167 is always constant,
The cartridge 8 is held at a fixed position.
Also, the disc hub 6 is the disc table 1
By the attraction force of the magnet provided on 04,
It is held in pressure contact with the disk table 104.

In this state, when the spindle motor 103 is driven, the disc 2 is rotated together with the disc table 104. The disk 2 is rotated at a predetermined angular velocity by the spindle motor 103. An optical pickup device including the optical block unit 118 and the lens bobbin block unit 117, and the magnetic head device 1 are also provided.
The reference numeral 66 indicates that an information signal is written by applying a magnetic field and irradiating a light beam to the disk 2 rotated by the spindle motor 103.
Further, the information signal already written is read by irradiating the light beam.

In this recording and / or reproducing apparatus, when the elevating block is moved down to the side of the chassis 102 as shown by the arrow M in FIG. 10, the disc cartridge 101 is moved to the arrow in FIG. As indicated by O, by the urging force of the tension coil spring 143a,
The ejection operation is performed on the front side of the cartridge holder 128. Further, when the disc cartridge 1 is ejected to the front side of the central portion of the cartridge holder 128 shown in FIG. 13, the shutter opening rotation lever 137 is returned to the initial position by the torsion coil spring 139. The shutter member 3 closes the openings 4 and 10 as shown in FIG.

By the way, in this recording and / or reproducing apparatus, the cam portion of the cam plate 115 is a portion for holding the disc 2 on the disc table 104 as described above, and this holding operation is completed. After that, there is a portion for adjusting the height position of the disc cartridge 1. The cam plate 115 has a cam shape of a portion for performing the holding operation so as to rapidly move the elevating block 106 to a predetermined height, and a cam shape of a portion for adjusting the height position of the disc cartridge 1. Is shaped to move the elevating block 106 within a minute distance.

The elevating motor 111 can perform an accurate elevating operation with respect to the elevating block 106 with a minute movement amount of, for example, 1 μm in a state where the disc table 104 holds the disc 2. Has been done. Therefore, in this recording and / or reproducing apparatus, while the disc table 104 holds the disc 2, the elevating motor 111 raises and lowers the raising and lowering block 106 so that the disc 2 is always in the above state. It can be adjusted to a predetermined position with respect to the objective lens 155.

That is, in this recording and / or reproducing apparatus, the elevating motor 1 is based on the so-called focus error signal obtained from the optical pickup device.
By controlling the drive of 11, the so-called focus servo operation can be performed in which the signal recording surface of the disk 2 is always on the focus of the light beam formed by the objective lens 155. Therefore, this record and / or
Alternatively, in the optical pickup device that constitutes the reproducing device, it is not necessary to provide a so-called objective lens driving device that moves the objective lens 155 in the optical axis direction, that is, an actuator.

In the disk cartridge according to the present invention, as shown in FIG. 15, the cartridge 8 can be positioned by using the second positioning reference surface portions 18a and 19a. That is, the chassis 10
A pair of positioning pins 170, 170 are erected on the upper surface of the second positioning pin 170, 170, and the positioning pins 170, 170 are placed in the positioning holes 1 described above.
By inserting the cartridges 8 and 19 in correspondence with each other, the cartridge 8 is positioned with respect to the chassis 102. These positioning pins 170, 170 are so-called stepped pins in which a step-like expanded diameter portion is formed on the tip end side, and the tip end side portion of this expanded diameter portion is set on each of the second positioning reference surface portions 18a, 19a. The cartridge 8 is positioned by bringing it into contact with each other.

In this way, when the cartridge 8 is positioned by using the second positioning reference surface portions 18a and 19a, the disc cartridge 1
Is perpendicular to the chassis 102.
2 is moved in a direction approaching 2, and is positioned on the chassis 102 so as to be placed on the chassis 102. The movement of the disc cartridge 1 in the vertical direction with respect to the chassis 102 is
The cartridge holder 28 holding the disc cartridge 1 can be moved and operated by using a predetermined moving operation mechanism.

In the above-mentioned optical pickup device in the recording and / or reproducing apparatus, the recording track is periodically moved in the radial direction of the disc 2 due to the eccentricity of the disc 2 accompanying the rotation of the disc 2. The so-called tracking servo that causes the light beam emitted from the objective lens 155 to follow is performed by deflecting the light beam incident on the objective lens 155 by the galvano mirror 153. However,
The tracking servo is performed by the pickup guide shafts 163, 16 of the lens bobbin block 160.
4 or by moving the objective lens 155
It is also possible to perform this operation by moving only the lens bobbin block 160 in the radial direction of the disc 2 by supporting only the so-called objective lens drive device.

[0070]

As described above, in the disc cartridge according to the present invention, the cartridge in which the recording disc is rotatably accommodated is the first cartridge provided on the peripheral side of the chucking opening formed in the main surface portion. Can be positioned by the positioning reference surface portions of, and can also be positioned by the pair of second positioning reference surface portions provided on the peripheral side of the pair of positioning holes provided in the main surface portion.

In this recording and / or reproducing apparatus having a simplified structure in which the rotation drive mechanism is moved and operated, the disc cartridge is positioned and held by the first positioning reference surface portion. Further, in the recording and / or reproducing apparatus in which the disk holder is configured to move the cartridge holder, the cartridge is positioned by the second positioning reference surface portion.

That is, according to the present invention, recording and / or recording with a simplified structure by moving the rotary drive mechanism is performed.
Further, there is provided a disc cartridge which can be used in a reproducing apparatus, and which is capable of positioning a cartridge in a stable state even in a recording and / or reproducing apparatus adapted to move a cartridge holder. Is something that can be done.

[Brief description of drawings]

FIG. 1 is a perspective view showing the configuration of a disc cartridge according to the present invention, as viewed from the bottom side.

FIG. 2 is a perspective view from the bottom side showing a state where the shutter member of the disc cartridge is opened.

FIG. 3 is a bottom view showing the configuration of the disc cartridge.

FIG. 4 is a bottom view showing a state where a shutter member of the disc cartridge is opened.

FIG. 5 is an exploded perspective view showing a partially broken configuration of a recording and / or reproducing apparatus in which the disc cartridge according to the present invention is mounted and which positions the cartridge using the first positioning reference surface portion.

FIG. 6 is a perspective view showing a state in which the disc cartridge is mounted on the recording and / or reproducing apparatus in a see-through manner.

FIG. 7 is an enlarged plan view showing a partially broken structure of the optical pickup device of the recording and / or reproducing device.

FIG. 8 is an enlarged side view showing a state in which the insertion operation of the disc cartridge is started with respect to the recording and / or reproducing apparatus, with a part thereof broken away.

FIG. 9 is an enlarged side view showing a state in which the insertion operation of the disc cartridge is completed with respect to the recording and / or reproducing apparatus, with a part thereof broken away.

FIG. 10 is an enlarged side view showing a state in which a holding operation for the disc cartridge inserted in the recording and / or reproducing apparatus is completed, with a part thereof broken away.

FIG. 11 is an enlarged exploded perspective view showing a configuration of a shutter opening mechanism of the recording and / or reproducing apparatus.

FIG. 12 is an enlarged plan view showing a configuration of the shutter opening mechanism in an initial state.

FIG. 13 is an enlarged plan view showing a state where the shutter opening mechanism opens the shutter member of the disc cartridge.

FIG. 14 shows 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. 15 is a side view showing a state in which the disc cartridge is held by using a second positioning reference surface portion.

[Explanation of symbols]

 2 ... Disk 5 ... First positioning reference surface 8 ... Cartridge 9 ...・ ・ ・ ・ ・ ・ ・ ・ Chucking opening 18 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Front positioning hole 18a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Second positioning reference surface 19 ・..... Rear positioning hole 19a ..... Second positioning reference surface portion

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location G11B 23/03 J 7201-5D

Claims (1)

[Claims] 1. A recording disk, a cartridge in which the recording disk is rotatably accommodated, and a chucking opening formed on a main surface of the cartridge to expose a chucked portion of the disk to the outside. A first positioning reference surface portion provided on the outer side surface portion of the cartridge on the peripheral side of the chucking opening, and a pair of positioning holes provided on the outer surface portion of the cartridge on the main surface portion of the cartridge. And a pair of second positioning reference surface portions provided on the peripheral side of the disk cartridge.