JPH05128780A - Disk cartridge - Google Patents

Abstract

PURPOSE:To prevent sticking of dust, etc., and to maintain positioning performance by providing a shutter in the aperture of the cartridge and concealing a positioning contact part at the time of closing a cap. CONSTITUTION:The shutter member 3 formed of upper and lower members 3a, 3b and a connecting member 3c to a U shape is provided in the form of holding both upper and lower main surface parts of the front edge part 16 of the cartridge 8 in between. This member is slidably supported to close the apertures 4, 10 for recording and reproducing of the cartridge to conceal the positioning abutting part 5 provided on the outer flank of the cartridge. The sticking of dust and contaminants to the positioning contact part is prevented and the positioning member is abutted in a good state when the disk cartridge is not used.

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 into a thin casing so that the recording disk can be housed, and has an opening in the main surface portion for exposing a part of the signal recording area and the chucked portion to the outside. ing.

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 contact 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 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.

[0008]

By the way, in the disc cartridge as described above, dust or contaminants are formed on the positioning contact surface portion formed on the outer surface portion of the cartridge during storage of the disc cartridge when not in use. May be attached. This is because the positioning contact surface portion is formed on the outer surface side of the cartridge and is often formed as a concave portion so that the positioning can be performed favorably.

If dust or dirt adheres to the positioning contact surface, the cartridge cannot be properly positioned in the recording and / or reproducing apparatus. That is, when dust or contaminants are attached to the positioning contact surface portion, the dust or contaminants are interposed between the positioning contact surface portion and the positioning member, and the positioning contact surface portion and the positioning member are positioned. This is because the members cannot come into contact with each other.

If the cartridge is not properly positioned, there is a possibility that the inner surface of the recording disk rotated by the rotary drive mechanism may be rubbed, and the information signal to the recording disk is good. There is a possibility that recording and / or reproduction may be hindered and the recording disc may be damaged or soiled.

Therefore, the present invention has been proposed in view of the above situation, and prevents adhesion of dust and contaminants to the positioning contact surface formed on the outer surface of the cartridge for storing the recording disk. It is an object of the present invention to provide a disc cartridge in which the positioning of the cartridge can always be favorably performed.

[0012]

In order to solve the above problems and achieve the above objects, a disk cartridge according to the present invention comprises a recording disk, a part of a signal recording area of the recording disk, and a chucked portion. The cartridge includes a cartridge rotatably housed facing the outside through an opening, and a shutter member slidably supported by the cartridge to open and close the opening. The shutter member closes the opening. When the lid is covered, the positioning contact surface portion for positioning the cartridge provided on the outer surface of the cartridge is concealed.

[0013]

In the disk cartridge according to the present invention, when the shutter member slidably supported by the cartridge containing the recording disk and opening and closing the opening formed in the cartridge closes the opening. Since the positioning contact surface portion for positioning the cartridge, which is provided on the outer surface of the cartridge, is hidden, dust or contaminants are prevented from adhering to the positioning contact surface portion when not in use.

[0014]

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 3, a disc cartridge 1 according to the present invention is configured to rotatably accommodate a magneto-optical disc 2 in a cartridge 8.
The magneto-optical disc 2 has a disc substrate having a disc 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 disc substrate. Has been done. And this disc 2
A hub mounting hole is provided in the central portion of the. 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. This disc hub 6
A center hole 7 is formed at the center of the signal recording layer, the center hole of which is substantially concentric and spirally formed on the signal recording layer so that its center coincides with the center of curvature of the recording track.

The cartridge 8 is formed in a thin casing capable of accommodating the disk 2 by the upper and lower halves 8a and 8b forming a pair being butted against each other. 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, a positioning contact surface portion 5 for contacting the contact protrusion 168 of the cartridge positioning member 167 of the recording and / or reproducing apparatus is formed around the chucking opening 9. Has been done. The positioning contact surface portion 5 is formed as a bottom surface portion of a stepped recess formed in the peripheral portion of the chucking opening 9.

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. The upper shutter plate 3a includes the cartridge 8 of the connecting plate 3c.
The opening 12 is formed at a position closer to one side in the slidable direction with respect to. Further, the lower side 3b is formed in a rectangular shape, and the cartridge 8 of the connecting plate portion 3c is formed.
The connecting plate 3c is provided at a position closer to one side in the slidable direction with respect to the connecting plate 3c.

As shown in FIG. 1, when the shutter member 3 is in one side position with respect to the cartridge 8, the other side portion of the upper shutter plate portion 3a and the lower shutter plate portion 3b are connected to each other. These recording / reproducing openings 4, 10 are made to correspond to the respective recording / reproducing openings 4, 10.
10 is closed. At this time, the lower shutter plate portion 3b covers the chucking opening 9 and the positioning contact surface portion 5 and hides them from the outside.

As shown in FIG. 2, when the shutter member 3 is slid to the other side position with respect to the cartridge 8 as shown by an arrow S in FIG. 2, the opening 12 is recorded and reproduced on the upper side. The one side portion 11 of the lower shutter plate portion 3c is made to substantially coincide with the other side edge of the lower recording and reproducing opening portion 10 so as to correspond to the opening portion 4 for recording, and these recording and reproducing opening portions 4, 10 are formed. Open the lid. At this time, the chucking opening 9 and the positioning contact surface portion 5 are exposed to the outside.

The shutter member 3 is provided with an urging 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 face of the cartridge 8 is
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 has one side portion corresponding to the opening 12 of the upper shutter plate portion 3a.
The width is made narrower than other portions, and is made smaller than the thickness of the disk 2. That is, the opening 12 of the upper shutter plate part 3a is not connected to the connecting plate part 3c.
It is formed so as to hang over. Further, a portion of the cartridge 8 facing the side edge portion of the disc 2 and corresponding to the recording / reproducing openings 4 and 10,
That is, the front edge portion 16 of the cartridge 8 facing outward in both sides of one side portion of the connecting plate portion 3c when the recording / reproducing openings 4 and 10 are opened is the disc 2 It is thinner than the thickness of.

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 disk cartridge according to the present invention has a chassis 102 at the bottom as shown in FIGS. 3 and 4. 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
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, 107, as shown by arrows M and N in FIG. ，
It is movably supported along 107 along the direction of contact with and away from the chassis 102. That is, the spindle motor 103 is movable in the contacting / separating direction with respect to the chassis 102. This spindle motor 1
03 supports a spindle shaft 105 integrated with a drive shaft substantially perpendicular to the chassis 102.
The spindle shaft 105 has a tip end on the chassis 10 side.
It is directed to the upper side of 2.

A disc table 104 is attached to the drive shaft of the spindle motor 103 so as to surround the peripheral portion of the spindle shaft 105 on the tip end side. 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.

On the chassis 102, at a position on the front side of the spindle motor 103, an elevating motor 111 for contacting and separating the elevating block 106 with the disc table 104 and the like, that is, elevating operation for the chassis 102. 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 elevating 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. 4, 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 by manual operation.

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. 5, 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. 3 and 5. 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 disc 2 is detected based on the light detection 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 FIG. 3 and FIG. 6, 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 provided in 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. 3, 9 and 10, 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.

Then, the shutter opening rotary lever 1
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 denotes a tension coil spring 143a which causes the shutter opening pin 141 indicated by an arrow B in FIG.
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,
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, 3, and 6.

Then, as shown in FIG. 10, the lower end side 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. 11, 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, and the chucking opening portion 9 and the positioning contact surface portion 5 are exposed to the outside. 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, the front edge portion 1 of the cartridge 8 is
As shown in FIGS. 2, 3 and 6, 6 is in a state of facing outward in the vertical direction of the connecting plate portion 3 c of the shutter member 3.

The disk cartridge 1 which is further inserted 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. 7, 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 rotation 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. 12, 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 used.
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. 8, 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. Then, when the elevating block 106 is operated to rise to the rotational drive position, as shown in FIG.
The disc hub 6 of the disc 2 is placed on the disc table 104, and the cartridge 8
Are placed on the cartridge positioning member 167. At this time, the tip end side of the spindle shaft 105 is fitted into the center hole 7. At this time, in the cartridge 8, the positioning contact surface portion 5 which is the peripheral portion of the chucking opening 9 is provided with the contact protrusions 168, 168, 1 of the cartridge positioning member 167.
It is positioned by abutting against 68.

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 chassis 102 side as shown by the arrow M in FIG. 8, 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. 11, 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, the cam portion of the cam plate 115 is
As described above, the disc 2 is placed on the disc table 1
It has a portion for holding the disc cartridge 04 and a portion for adjusting the height position of the disc cartridge 1 after the holding operation is completed. In the cam plate 115, the cam shape of the portion that performs the holding operation is the lifting block 10.
6 is made to move abruptly to a predetermined height, and the cam shape of the portion for adjusting the height position of the disc cartridge 1 is made to move the elevating block 106 within a minute distance. There is.

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, a unit of 1 μm while 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 operated based on the so-called focus error signal obtained from the optical pickup apparatus.
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 optical pickup device of this recording and / or reproducing apparatus, the objective is applied to the periodic movement of the recording track 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 lens 155 to follow is performed by deflecting the light beam incident on the objective lens 155 by the galvano mirror 153. However, this tracking servo is performed by the lens bobbin block 16 described above.
0 along the pickup guide shafts 163 and 164, or by supporting only the objective lens 155 via a so-called objective lens driving device, the disc 2 of the disc 2 is moved relative to the lens bobbin block 160. It can also be performed by moving in the radial direction.

[0066]

As described above, in the disc cartridge according to the present invention, the shutter member slidably supported by the cartridge containing the recording disc to open and close the opening formed in the cartridge is the above-mentioned opening. When the lid is closed, the positioning contact surface portion for positioning the cartridge, which is provided on the outer surface of the cartridge, is hidden.

Therefore, in this disc cartridge, dust and contaminants are prevented from adhering to the positioning contact surface portion when not in use. Therefore, the positioning member such as the positioning pin that abuts on the positioning abutting surface portion for positioning the cartridge of the disc cartridge can always abut well on the positioning abutting surface portion.

That is, according to the present invention, it is possible to prevent dust and contaminants from adhering to the positioning contact surface formed on the outer surface of the cartridge for accommodating the recording disk, so that the cartridge can always be positioned well. It is possible to provide a made disk cartridge.

[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 an exploded perspective view showing a partially broken structure of a recording and / or reproducing apparatus in which a disc cartridge according to the present invention is mounted.

FIG. 4 is a perspective view showing a state in which the disc cartridge is mounted in the recording and / or reproducing apparatus, as seen through.

FIG. 5 is an enlarged plan view showing a partially broken structure of the optical pickup device of the recording and / or reproducing device.

FIG. 6 is an enlarged side view showing, in a partially broken view, a state in which an operation of inserting the disc cartridge into the recording and / or reproducing apparatus is started.

FIG. 7 is an enlarged side view showing a state in which the insertion operation of the disc cartridge with respect to the recording and / or reproducing apparatus is completed, with a part thereof broken away.

FIG. 8 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. 9 is an enlarged exploded perspective view showing a configuration of a shutter opening mechanism of the recording and / or reproducing apparatus.

FIG. 10 is an enlarged plan view showing a configuration of the shutter opening mechanism in an initial state.

FIG. 11 is an enlarged plan view showing a state where the shutter opening mechanism opens the shutter member of the disc cartridge.

FIG. 12: 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.

[Explanation of symbols]

 2 ... Disk 3 ... Shutter member 5 ... Positioning contact surface 8 ... ·········cartridge

Claims (1)

[Claims] 1. A recording disk, a cartridge in which a part of a signal recording area of the recording disk and a portion to be chucked are rotatably housed so as to be exposed to the outside through an opening, and slidably mounted on the cartridge. A shutter member that is supported to open and close the opening, and the shutter member is provided on the outer side surface of the cartridge for positioning the cartridge when the opening is closed. Disc cartridge with hidden contact surface