JP3518141B2 - Disk cartridge - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a high capacity magneto-optical disk system (High Density MO DiskDrive).
The present invention relates to a disc cartridge most suitable to be applied to an HS cartridge that accommodates an HS disc applied to a system), and particularly belongs to the technical field of a shell that rotatably accommodates a disc-shaped recording medium such as an HS disc. .

[0002]

2. Description of the Related Art Recently, as a large-capacity magneto-optical disk applied to a large-capacity magneto-optical disk system (so-called HS), an HS disk in which the recording capacity of an MO disk is further increased has been developed. An HS cartridge, which is a large-capacity disk cartridge in which the HS disk is rotatably housed in a shell composed of upper and lower shells injection-molded of synthetic resin, has been announced. In addition, H
The S cartridge has the same size as the 3.5-inch floppy disk cartridge.
The diameter of the S disk is about 3.5 inches (85-90 mm)
Is configured.

In this HS cartridge, a pair of left and right erroneous insertion determination notches are formed on both sides of the lower shell in the direction of insertion into the HS drive, and on both sides of the upper shell in the direction of insertion into the HS drive. A pair of left and right integrally formed wings cover the upper part of the pair of left and right notches for erroneous insertion determination of the lower shell.

Only when the HS cartridge is correctly inserted into the cartridge holder of the HS drive, the pair of left and right erroneous insertion preventing claws formed in the cartridge holder are used for erroneous insertion discrimination of the HS cartridge. Make sure to insert it relatively in the notch,
Allows the insertion of the HS cartridge into the cartridge holder. On the other hand, when the HS cartridge is mistakenly inserted into the cartridge holder (when it is inserted wrongly in the front-back and up-down directions) or when other similar cartridges such as the 3.5-inch floppy disk cartridge are mistakenly inserted into the HS drive, The pair of left and right erroneous insertion prevention claws are configured to prohibit the insertion.

[0005]

By the way, when the upper and lower shells of the HS cartridge are injection-molded with synthetic resin, most of the ceiling walls of the upper and lower shells are thinned in order to make the thickness of the entire shell as thin as possible. On the other hand, the pair of left and right wing portions of the upper shell may be formed thick in order to ensure strength. However, if the thickness of the pair of left and right wings is made thicker than the thickness of most of the ceiling wall of the upper shell, a "shrinkage phenomenon" of synthetic resin occurs in the pair of left and right wings during molding. However, there has been a problem that the surface of the upper shell in the wing portion is deformed such as dented or distorted, and the appearance is considerably deteriorated, resulting in a significant loss of commercial value.

The present invention has been made in order to solve the above problems, and the total thickness of the shell can be made as thin as possible and the strength of the pair of left and right wings of the upper shell can be sufficiently secured. An object of the present invention is to provide a disk cartridge in which the synthetic resin "shrinkage phenomenon" does not occur in the pair of left and right wings when the upper shell is formed of synthetic resin.

[0007]

DISCLOSURE OF THE INVENTION To achieve the above object, a disk cartridge of the present invention comprises an upper shell and a lower shell.
Made-out pair of erroneous insertion discrimination notch molded on both sides of the insertion direction side to the disk drive of the shells, the lower shell
Notch from the bottom of the shell to the depth reaching a part of the side of the upper shell
Opened on the bottom and side of the shell
The upper shell is integrally molded on both sides of the disk drive in the direction of insertion, and is used to discriminate between a pair of lower shell left and right
The lower surface of the pair of left and right wings covering the upper portion of the notch is formed by stealing the inside of the outer peripheral rib to a thickness approximately the same as the ceiling wall of the upper shell.

The disk cartridge of the present invention constructed as described above is a disk having a shell consisting of upper and lower shells.
A pair of left and right molded on both sides of the insertion direction to the drive
The notch for discriminating incorrect insertion is provided from the bottom of the lower shell to the upper shell.
Notched to the depth of part of the side, the bottom of the shell
And the disk of the upper shell that is open to two sides
It is integrally molded on either side of the insertion direction side to the drive, the bottom sheet
The undersides of the pair of left and right wings that cover the upper part of the pair of left and right notch for misinsertion discrimination are the inner wall of the outer peripheral rib, and the meat is stealed to a thickness of about the same as the ceiling wall of the upper shell. When molding the upper shell with synthetic resin, the synthetic resin "shrinkage phenomenon" does not occur between the pair of left and right wings.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an HS cartridge will be described below with reference to the drawings.

[Description of Main Parts of the Invention] First, the main parts of the present invention will be described with reference to FIGS. That is, in the present invention, a pair of left and right erroneous interpolation of the lower shell 3
Notch 40 for determining entry and recess 42 for retracting cartridge
To secure the strength of the pair of left and right wings 41 and the ceiling 43 of the recess integrally formed on the upper shell 2 so as to cover the upper parts of the upper shell 2 and the "shrinkage phenomenon" of the synthetic resin during the injection molding of the upper shell 2 with the synthetic resin. It is possible to form the upper shell 2 having a good appearance without causing dents, distortions or the like on the surface of the upper shell 2 in the pair of left and right wing portions 41 and the recess ceiling portion 43 so as not to generate. Has an aim.

For this reason, as shown in FIGS. 1, 2, 4 and 5, the lower surfaces 41a, 43a of the pair of left and right wings 41 and the recess ceiling portion 43 of the upper shell 2 are formed.
Then, the insides of these outer peripheral ribs 41b and 43b are subjected to meat stealing to a thickness T ₁₂ which is approximately the same as the thickness T _{11 of} most of the ceiling wall 2a of the upper shell 2, and the lower surfaces 41a and 43
a, concave portions 41c and 43c are formed inside the outer peripheral ribs 41b and 43b, respectively. On this occasion,
Shutter slide recess 2 on ceiling wall 2a of upper shell 2
Most of the thickness T ₁₁ except 5 etc. is configured to be 1.2 mm, and the thickness T of the pair of left and right wing portions 41 and the recessed ceiling portion 43 is T.
₁₂ is configured to be 1.2 mm to 1.4 mm. Also,
The width W _{11 in} the horizontal direction of the outer peripheral ribs 41b, 43b of the pair of left and right wings 41 and the recess ceiling 43 is set to 0.7 mm, and the shutter slide recess 26 of the bottom wall 3a of the lower shell 3 is formed. Most of the thickness except T ₁₃ is 1.3 mm.

As described above, on the lower surfaces 41a and 43a of the pair of left and right wing portions 41 and the recessed ceiling portion 43, the inside of these outer peripheral ribs 41b and 43b is covered with the thickness T _{12 of} most of the ceiling wall 2a of the upper shell 2. If the meat is stealed to a thickness T ₁₂ that is almost the same as that of the synthetic resin, when the upper shell 2 is injection-molded with the synthetic resin, a "shrinking phenomenon" of the synthetic resin occurs in the wing portion 41 and the recess ceiling portion 43. So these wings 41
Further, the upper shell 2 having a good appearance can be formed in which the surface of the upper shell 2 (referred to as the upper surface of the ceiling wall 2a) in the recessed ceiling portion 43 is not deformed such as dented or distorted. Nevertheless, these wings 41 and the recess ceiling 43
In addition, the outer peripheral ribs 41b and 43b can secure a substantial thickness to obtain sufficient strength, and the ceiling wall 2a of the upper shell 2 and the bottom wall 3a of the lower shell 3 can be obtained.
Since the thicknesses T ₁₁ and T ₁₃ of the shell 4 can be made sufficiently thin from 1.2 mm to 1.3 mm, the total thickness T ₁ of the shell 4 is 5.0.
It can be made sufficiently thin to about mm.

The thickness T ₁₂ of the pair of left and right wings 41 and the recess ceiling 43 may be 1.2 mm which is exactly the same as the thickness T ₁₁ of the ceiling wall 2a of the upper shell 2. By setting the thickness T ₁₂ of the wing portion 41 and the recessed ceiling portion 43 to 1.3 mm or more, these wing portion 41 and the recessed ceiling portion 4 are formed when the upper shell 2 is molded with a semitransparent synthetic resin.
There is an effect that it is possible to prevent seeing through 3 as much as possible.

Further, as shown in FIG. 3, a plurality of reinforcing ribs 41d are provided inside the outer peripheral ribs 41a of the pair of left and right wings 41.
If these are integrally molded, the strength of these wing portions 41 can be further improved. Similarly, as shown in FIGS. 1 to 4, reinforcing ribs are provided on the lower surface 43b of the pair of left and right recessed ceilings 43 on the side surface open side of the pair of left and right cartridge retracting recesses 42 (the left side in FIG. 2). By integrally molding 43d, the strength of these recess ceiling portions 43 can be further improved, and the vertical depth T of the cartridge retracting recess 42 is increased by these reinforcing ribs 43d.
_The cartridge retracting means (not shown) into the cartridge retracting recesses 42 by accurately controlling ₄
It is possible to smoothly perform the inserting / removing operation in the vertical and horizontal directions.

[Overall Description of HS Cartridge] Next, the overall HS cartridge 1 will be described with reference to FIGS. First, the HS cartridge, which is a disc cartridge, has a flat and substantially rectangular shell 4 in which upper and lower shells 2 and 3 injection-molded of synthetic resin are fitted from above and below and integrally joined by welding or the like. The HS disk 5, which is a recording medium, is rotatably housed in the shell 4. The HS disk 5 is a large-capacity magneto-optical disk in which the recording capacity of the MO disk is further increased, and a center hub 6 formed by pressing a metal plate such as a stainless plate is fixed to the center by adhesion or the like. A spindle insertion hole 6a is formed at the center of the center hub 6.

On the outer periphery of the lower surface of the ceiling wall 2a of the upper shell 2 and the upper surface of the bottom wall 3a of the lower shell 3, the left and right side edges 3c except the front end edges 2b and 3b and the rear edge 3d are three sides. Rib-shaped outer peripheral wall 2 formed in a substantially U shape along the
e and 3e are integrally formed, respectively, and a pair of upper and lower disc outer peripheral receiving ribs 7 and 8 having a substantially circular ring shape and having the same diameter along the outer periphery of the lower surface of the ceiling wall 2a and the upper surface of the bottom wall 3a.
Are integrally molded. On the lower surface of the ceiling wall 2a and the upper surface of the bottom wall 3a, the disc outer peripheral receiving ribs 7,
8, a plurality of welding dowels 10 and 11 that are opposed to each other from above and below are integrally formed, and the upper and lower shells 2 and 3 are fitted from above and below to form a plurality of welding dowels 9 and 1.
By welding 0 by ultrasonic welding or the like, the upper and lower shells 2 and 3 are integrally combined to form a flat rectangular shell 4
Is assembled. At least one of the ceiling wall 2a and the bottom wall 3a of the upper and lower shells 2 and 3 is provided with a plurality of gap restricting portions such as pins, ribs and bosses for restricting the clearance between the ceiling wall 2a and the bottom wall 3a. It is integrally molded.

By coupling the upper and lower shells 2 and 3 from above and below, a pair of upper and lower disk outer peripheral receiving ribs 7 and 8 are superposed from above and below, and a flat and circular disk storage space 13 is formed inside them. Once formed, the HS disk 5 is horizontal in the disk storage space 13,
It is stored freely. Then, on the lower surface of the ceiling wall 2a of the upper shell 2, a cartridge center P ₁ (this cartridge center P ₁ means the center of the shell 4 in the left-right lateral width direction) which is the center of the disk outer peripheral receiving rib 7 is annularly formed. The disc upper surface side receiving rib 14 is integrally formed in a concentric circular shape, and the bottom wall 3a of the lower shell 3 is the center portion of the disc outer peripheral receiving rib 8 and is the cartridge center P.
_A circular disk table insertion hole 15 is concentrically opened on the top of the disk _1. The center hub 6 of the HS disk 5 is loosely fitted in the disk table insertion hole 15.

On the ceiling wall 2a and the bottom wall 3a of the upper and lower shells 2 and 3, a pair of upper and lower head insertion holes are formed in a long hole shape from a position near the outer periphery of the disk table insertion hole 15 to these front edges 2b and 3b. 16 and 17 are opened along the cartridge center P ₁ . Then, the front end edges 2b, 3b of the pair of upper and lower head insertion holes 16, 17 are formed.
Side open ends 16a, 17a side of these head insertion holes 1
A pair of upper and lower bridge pieces 18 and 19 which are connected to _each other in the width direction of 6 and 17 (a direction perpendicular to the cartridge center P ₁ ) and which are substantially symmetrical in the vertical direction are the lower surfaces of the ceiling walls of the upper and lower shells 2 and 3. Horizontally integrally molded on the upper surfaces of 2a and the bottom wall 3a. The bridge pieces 18 and 19 are superposed from above and below at the center position in the thickness direction of the shell 4, and the inner side surfaces 18 of the bridge pieces 18 and 19 are overlapped with each other.
Reference characters a and 19a are formed in an arc shape having the same diameter as the inner peripheral surfaces 7a and 8a of the pair of upper and lower disk outer peripheral receiving ribs 7 and 8, and the outer surfaces 18b and 19b are formed at a right angle to the cartridge center P ₁ . Has been done.

On the lower surface of the ceiling wall 2a and the upper surface of the bottom wall 3a of the upper and lower shells 2 and 3, these bridge pieces 18, 1 are provided.
A pair of left and right shutter guide grooves 21, 22 are provided at the left and right side positions of 9, respectively.
Is formed at a right angle to the cartridge center P ₁ . Then, the shutter slider 23 formed of synthetic resin is provided with a pair of upper and lower bridge pieces 18, 19.
In the outer position of the cartridge, the upper and lower shells 2, 3 are assembled between the front end edges 2a, 3a at a right angle to the cartridge center P ₁ . The entire shutter slider 23 is formed in a substantially U shape by a pair of left and right guide pieces 23a and 23b integrally formed inside both ends of the shutter slider 23 in the length direction (horizontal direction). The pair of guide pieces 23a and 23b are the upper and lower shells 2,
3 pairs of left and right, 4 shutter guide grooves 21, 2 in total
It is slidably engaged between the two. Therefore, the shutter slider 23 is set in the shutter guide grooves 21, 2.
The upper and lower shells 2 and 3 are guided by 2 and slidable in the front edges 2a and 3a of the upper and lower shells 2 and 3 in the directions of arrows a and b which are perpendicular to the cartridge center P ₁ .

Then, the shutter 24 pressed by a metal plate such as a stainless plate is formed in a substantially U shape by a pair of upper and lower shutter pieces 24a and 24b and a connecting piece 24c which connects one ends of these at a right angle. ing. The shutter 24 is fixed to the outer side of one end side of the shutter slider 23 by a connecting piece 24c by welding with a welding dowel, screwing, or the like, and a pair of upper and lower shutter pieces 24a and 24b of the shutter 24 is attached to the upper and lower shells 2. 3 are slidably stacked on the upper surface of the ceiling wall 2a and the lower surface of the bottom wall 3a. At this time, the upper shutter piece 24a is formed as a small piece that can close only the upper head insertion hole 16, and the lower shutter piece 2a.
4b is formed as a large piece so that the lower head insertion hole 17 and the disc table insertion hole 16 can be closed at the same time. Then, the pair of upper and lower shutter pieces 24a, 2
4b is the top and bottom walls 3 of the ceiling walls 2a of the upper and lower shells 2, 3.
These shutter pieces 24a, 2 formed on the bottom surface of a
Shutter slide recess 2 corresponding to the thickness of 4b
It is configured to slide in the directions of arrows a and b within 5, 26. It should be noted that the lower shutter piece 24b formed on the large piece has a tip (an end on the side opposite to the connecting piece 24 side) made of a stainless steel plate or the like fixed to the end inside the lower recess 26 by adhesion or the like. It is slidably inserted inside the shutter guide piece 27.

Therefore, the shutter 24 is integrated with the shutter slider 23, and the front end edges 2b of the upper and lower shells 2 and 3,
3b and the closed position shown in FIG. 9 (the position where the pair of upper and lower shutter pieces 24a and 24b simultaneously closes the disk table insertion hole 15 and the pair of upper and lower head insertion holes 16 and 17), and FIG. Opening position (a pair of upper and lower shutter pieces 24a and 24b are inserted into the disk table insertion hole 15
And a position which is offset to one side of the pair of upper and lower head insertion holes 16 and 17 so that the disk table insertion hole 15 and the pair of upper and lower head insertion holes 16 and 17 are simultaneously opened. , B can be slid in the directions.

Then, the front end edges 2a of the upper and lower shells 2 and 3,
A shutter spring 29 is housed in a substantially triangular shutter spring housing space 28 surrounded by outer peripheral ribs 2e and 3e and disk outer peripheral receiving ribs 7 and 8 inside one side of 3a. The shutter spring 29 is formed in a substantially V shape by a torsion coil spring, and both ends 29a and 29b of the shutter spring 29 are connected to the guide piece 23a on one end side of the shutter slider 23, the upper and lower shells 2,
3 is locked to a spring locking portion 30 integrally formed on either the lower surface of the ceiling wall 2a or the upper surface of the bottom wall 3a.
The shutter spring 29 slides the shutter slider 23 integrally with the shutter slider 23 in the direction of arrow b to the closed position.

The bottom wall 3a of the lower shell 3 is connected to the rear edge 3
A pair of right and left positioning holes 31 are formed at positions offset to the d side, and a write protector 32 for preventing erroneous erasure is provided inside one side of the rear end edges 2a, 3d of the upper and lower shells 2, 3.
Is attached slidably in the directions of arrows a and b. The light protector 32 is the upper and lower shells 2, 3
Of the upper and lower shells 2 and 3 are slidably fitted in protector guide ribs 33 integrally formed on either the lower surface of the ceiling wall 2a or the upper surface of the bottom wall 3a.
a and bottom wall 3a are formed with detection holes 34 and 35 for preventing erroneous erasure that are opened and closed by the light protector 32, and the sliding operation of the light protector 32 on the rear end edges 2d and 3d of the upper and lower shells 2 and 3. A hole 36 is formed. Incidentally, the front edge 2b of the upper and lower shells 2 and 3, the slide space of the shutter 24 have right-angled recess 37 against the cartridge center P ₁ is formed on the opposite side 3b, the shutter of the recess 37 At a position opposite to 24, a shutter opening / closing pin calling recess 38 is formed between the shutter slider 23 and one end of the shutter slider 23 returned to the closed position shown in FIG. A shutter opening / closing pin lock recess 39 is formed in the.

In addition to the basic structure described above, the HS cartridge 1 has a structure for preventing erroneous insertion into the HS drive and a structure for automatic loading into the HS drive. That is, on the front edge 2b, 3b side which is the insertion direction side of the upper and lower shells 2, 3 into the HS drive,
A pair of left and right erroneous insertion determination notches formed by cutting the left and right side edges 2c, 3c into a groove parallel to the cartridge center P ₁ to a depth reaching from the bottom surface of the lower shell 3 to a part of the lower surface of the upper shell 2. 40 is formed. Then, on the front end edge 2b side of the left and right side edges 2c of the upper shell 2, a portion that covers the upper portions of the pair of left and right erroneous insertion determination notches 40 is formed in the pair of left and right wing portions 41. Is formed to be slightly thinner than the total thickness of the upper shell 2.

Then, the pair of left and right erroneous insertion determination notches 40 of the lower shell 3 are arranged in the length direction (cartridge center P ₁
A pair of left and right cartridge retracting recesses 42 that are notched in a substantially semicircular shape are formed in the middle of the direction (along the direction). The depth of the pair of left and right cartridge retracting recesses 42 (in the thickness direction of the upper and lower shells 2 and 3) is the same as the depth of the pair of left and right erroneous insertion determination notches 40. Inside the pair of left and right wing portions 41, a part of the ceiling wall 2a covers the upper portions of the pair of left and right cartridge retracting concave portions 42.
3 is formed.

[Description of Dimensions of HS Cartridge] Next, the dimensions of each part of the HS cartridge 1 configured as described above will be described. First, the HS disk has a diameter of 85 to 90 mm, which is about 3.5 inches, and is configured to be 88 mm, for example. The outer dimensions of the entire HS cartridge 1 are approximately the same as those of the 3.5-inch floppy disk cartridge, and the width W _{1 in} the left-right direction, the depth D _{1 in the} front-rear direction, and the vertical direction of the entire shell 4 is set. Thickness T ₁ is W ₁ = 92 mm, D ₁ respectively
= 97 mm and T ₁ = 5 mm. And
The thicknesses T ₂ and T ₃ of the upper and lower shells ₂ and ₃ are 2.5 m, respectively.
m. The inner diameter D ₂ of the disc insertion hole 15 is set to 19.5 mm, and the upper head insertion hole 1
6 in the lateral direction of the width W ₂ and the longitudinal direction of the depth D ₃ each _{W 2 = 16mm, D 3 =} 38mm configured, the width W ₃ and the longitudinal direction of the depth D ₄ lateral direction of the lower head insertion hole 17 Respectively W ₃ = 19.5 mm, D ₄ = 38 m
m. The width W _{4 in} the left-right direction, the depth T ₄ in the up-down direction, and the length L ₁ in the front-rear direction of the pair of left and right erroneous insertion determination notches 40 are W ₂ = 2.5 mm, respectively.
T ₄ = 3.0 mm and L ₁ = 38.5 mm, and the vertical thickness T _{5 of the} pair of left and right wings 41 of the upper shell 2 is 2.0 mm. The width W _{5 in} the front-rear direction and the depth D _{5 in the} left-right direction of the pair of left and right cartridge retracting recesses 42 are W ₅ = 4.3 mm, respectively.
D ₅ = 3.0 mm, and the vertical depth is the vertical depth T of the pair of left and right erroneous insertion determination notches 40.
It is configured to have the same 3.0 mm as ₄

[Description of HS Drive] Next, referring to FIGS. 11 to 15, the HS which is a disk drive for recording (writing) and reproducing (reading) information on the HS disk 5 is described.
The drive 51 will be described.

Front panel 5 of this HS drive 51
2, a horizontal and horizontally long cartridge insertion opening 53 having an inward opening / closing lid 53 is formed. Inside the HS drive 51, a cartridge holder 55 is horizontally arranged at a deep position of the cartridge insertion opening 53. ing. The horizontal ceiling plate 5 of the cartridge holder 55
5a has a substantially U-shaped cross section under the left and right edges.
In addition, a pair of left and right horizontal cartridge insertion guides 55b, which are symmetrically formed so as to face each other, are integrally formed. The front and rear direction of the pair of left and right cartridge insertion guides 55b (directions of arrows c and d)
A pair of left and right erroneous insertion preventing claws 56 are integrally formed inside the substantially central portion of the.

Then, one end of a horizontal shutter opening / closing lever 58 is attached to a vertical fulcrum pin 57 mounted on the ceiling plate 55a of the cartridge holder 55, and one end of the horizontal shutter opening / closing lever 58 is passed through the elongated hole 59 in the forward / backward direction (arrow c, d direction) and left / right. The vertical shutter opening / closing pin 60 attached to the lower part of the other end of the shutter opening / closing lever 58 is mounted so as to be rotatable and slidable in the directions (arrows a and b directions).
It is vertically inserted into the cartridge holder 55 through the guide groove 61 formed in a. The shutter opening / closing lever 58 is urged to move from the shutter open position shown in FIG. 13 to the shutter open position shown by the alternate long and short dash line in FIG. 12 by an eject spring 62 formed of a tension coil spring. A slotted head insertion notch 63 is formed along the cartridge center P ₁ from the central portion to the rear end of the ceiling plate 55a, and the ceiling plate 55a has a plurality of cartridge pressing springs composed of leaf springs. 64 is attached. A holder elevating mechanism (not shown) that vertically elevates and lowers the cartridge holder 55 in the HS drive 51 by parallel movement.
Is built in.

Inside the HS drive 51, at a lower position of the cartridge holder 55, on the cartridge center P ₁ and at a position deviated to the front panel 52 side, the vertical spindle 6 of the spindle motor 65 is provided.
6 and a disk table 67 integrally fixed to the rotor housing which is horizontally fixed to the outer periphery of the position near the upper end thereof. The objective lens 69 of the optical pickup 68 is attached to the upper portion of the carriage 70 inside the HS drive 51 at a position rearward (in the direction of arrow c) of the spindle motor 65 at the lower position of the cartridge holder 55. It is located on the center P ₁ . The carriage 70 includes a pair of left and right guide shafts 71, a pair of left and right voice coils 72, and a pair of left and right magnetic circuits 7 each including a pair of yokes and magnets.
A pair of left and right linear motors 74 composed of 3 and 3 are configured to seek in the directions of arrows c and d.

The optical block 75 of the optical pickup 68 is located behind the carriage 70 (on the side of arrow c).
The laser diode 76 and the collimator lens 7 are arranged in the optical block 75.
7, a beam splitter 78, a multi-lens 79, a reading phototransistor 80, a monitor phototransistor 81, and the like are incorporated. On the cartridge center P ₁ , a galvanometer mirror 82 is arranged on one side of the optical block 75, and the objective lens is inside the horizontal light transmission hole 83 formed on the cartridge center P ₁ of the carriage 70. A raising mirror 84 is incorporated in a position directly below 69. Then, the suspension 85 is provided on the rear end of the carriage 70 (the end on the arrow c direction side).
A magnetic field modulation head 86, which is a flying head attached via the above, is arranged at a position directly above the objective lens 69 on the cartridge center P ₁ with a space. A head elevating mechanism (not shown) for vertically elevating the magnetic field modulation head 86 in synchronization with the elevating operation of the cartridge holder 55 is incorporated in the HS drive 51.

The HS drive 51 is constructed as described above, and when the HS cartridge 1 is loaded, the upper shell 2 and the lower shell 3 are oriented in a correct horizontal posture with the upper shell 2 facing upward and the lower shell 3 facing downward. Front edge 2
It is horizontally inserted from the a, 3a side into the cartridge insertion port 54 in the direction of arrow c. And this HS cartridge 1
While pushing the open / close lid 53 inward by this HS
The cartridge 1 is attached to the ceiling plate 5 of the cartridge holder 55.
A pair of left and right cartridge insertion guides 55b at the bottom of 5a
Insert it horizontally from the direction of arrow a. Then, as shown in FIGS. 12 and 13, by inserting the HS cartridge 1 into the cartridge holder 55 in the direction of arrow c,
Right and left pair of notches 4 for erroneous insertion determination of the HS cartridge 1
0 is correctly inserted into the pair of left and right erroneous insertion preventing claws 56 in the cartridge holder 55 from the direction of arrow c. That is, at this time, the HS cartridge 1 is correctly inserted into the cartridge holder 55, and the pair of left and right erroneous insertion prevention claws 56 are inserted into the pair of left and right erroneous insertion determination notches 40 of the HS cartridge 1. The HS cartridge 1 can be smoothly inserted into the cartridge holder 55 by being relatively correctly inserted from the d direction.

With the insertion of the HS cartridge 1 into the cartridge holder 55 in the direction of the arrow c, first, the shutter opening / closing pin 60 which has been returned to the position indicated by the alternate long and short dash line in FIG. After being called into the shutter opening / closing pin calling recess 38 of the HS cartridge 1 shown in FIG. 9, the recess 37 pushes the shutter opening / closing pin in the direction of arrow c. Then, as shown by a solid line in FIG. 12, the shutter opening / closing pin 60 is moved in the direction of the arrow a along the recess 37 while being guided by the guide groove 61, so that the shutter opening / closing lever 58 moves. The shutter opening / closing pin 60 rotates the shutter slider 2 in the direction of arrow e.
One end of 3 is pushed in the direction of arrow a. Then, the shutter 24 is slid integrally with the shutter slider 23 from the closed position shown in FIG. 9 to the open position shown in FIG. 10 against the shutter spring 29, and the disc table insertion hole 15 of the HS cartridge 1 and The pair of upper and lower head insertion holes 16 and 17 are simultaneously opened.

Then, when the shutter 24 reaches the open position, the shutter opening / closing pin 60 enters the shutter opening / closing pin locking recess 39 shown in FIG. 9 and is locked at that position, and the HS cartridge 1 continues to be a cartridge. It is inserted in the holder 55 in the direction of arrow c. Then, when the HS cartridge 1 reaches the insertion completion position shown in FIG. 13, the HS cartridge 1 is stopped in the cartridge holder 55 by a cartridge stopper (not shown) in the cartridge holder 55. In addition, HS
Shutter opening / closing pin lock recess 39 of the cartridge 1
The shutter opening / closing pin 60 locked inside moves linearly in the arrow c direction along the guide groove 61 thereafter.

Then, almost at the same time when the insertion of the HS cartridge 1 into the cartridge holder 55 is completed, the cartridge holder 55 is lowered by the parallel movement. Then, the HS cartridge 1 is horizontally mounted from above on a plurality of cartridge positioning pins (not shown) in the HS drive 51, and two of the positioning pins are HS
The HS cartridge 1 is fitted into the pair of right and left positioning holes 31 of the cartridge 1, and the HS cartridge 1 is pressed and positioned on the plurality of cartridge positioning pins by the plurality of cartridge pressing springs 64 of the cartridge holder 55. Then, the loading of the HS cartridge 1 into the HS drive 51 is completed as described above.

On the other hand, the spindle motor 65 is already rotationally driven by turning on the power supply to the HS drive 51 before starting the loading. And the HS cartridge 1
Upon completion of the loading, the spindle 66 and the disc table 67 are relatively inserted from below into the disc table insertion hole 15 of the HS cartridge 1,
The upper end of the spindle 66 is inserted into the spindle insertion hole 6a of the center hub 6 of the disc 5, and the center hub 6 is fitted into the disc table 67 and magnetically chucked. Are floated up and down in the shell 4 at intermediate positions.

At the same time, the objective lens 69 of the optical pickup 68 is relatively inserted into the lower head insertion hole 17 of the HS cartridge 1 from below, and the objective lens 69 approaches the lower surface of the HS disk 5. At the same time, the magnetic field modulation head 86 is inserted from above into the upper head insertion hole 16 of the HS cartridge 1 through the head insertion notch 63 of the cartridge holder 55, and the magnetic field modulation head 86 is placed on the upper surface of the HS disk 5. It is levitated by an air film.

After that, the HS disk 5 is rotationally driven at a high speed in the HS cartridge 1 by the spindle motor 65, and the carriage 70 of the optical pickup 68 is sought in the arrow c and d directions by the pair of left and right linear motors 74. Then, the objective lens 69 and the magnetic field modulation head 86 are integrally sought in the directions of arrows c and d along the cartridge center P ₁ . Then, while modulating the magnetic field of the HS disk 5 by the magnetic field modulation head 86, the laser beam LB emitted from the optical block 75 of the optical pickup 68 is irradiated onto the HS disk 5 from below through the objective lens 69, and the HS disk 5 is irradiated. Records and plays back information.

At this time, the laser beam LB emitted from the laser diode 76 of the optical block 75 is horizontally irradiated to the galvano mirror 82 outside the optical block 75 through the collimator lens 77 and the beam splitter 78, and the laser beam LB is galvano mirror 82. Then, it is bent at 90 ° in the horizontal direction to irradiate the rising mirror 84 in the light transmission hole 83 of the carriage 70. Then, the laser beam LB is bent vertically by 90 ° by the rising mirror 84 to irradiate the objective lens 69 from below, and the objective lens 69 irradiates the laser beam LB to the HS disk 5 vertically from below. Then, the laser beam LB reflected by the HS disk 5 is passed through the objective lens 69, the rising mirror 84, and the galvano mirror 82 to the optical block 7
The beam is returned to the beam splitter 78 of No. 5 and is received (received) by the reading phototransistor 80 and the monitor phototransistor 81 through the multi-lens 79.
Information is recorded on and reproduced from the HS disc 5.

It should be noted that H after recording and reproducing of the HS disk 5
The eject operation of the S cartridge 1 is performed by the reverse operation of the loading operation described above. That is, first, the cartridge holder 55 is lifted by the parallel movement in the HS drive 51, and the HS disk 5 is lifted together with the HS cartridge 1, so that the HS disk 5 is separated upward from the spindle 65 and the disk table 67. At about the same time, the magnetic field modulation head 86 is released above the head insertion notch 63 of the cartridge holder 55. Then, almost simultaneously with the completion of the raising of the cartridge holder 55, the shutter opening / closing lever 58 is moved in the directions of arrows d and f by the eject spring 62, and the shutter opening / closing pin 60 is moved along the guide groove 61 along the arrows d and f.
The shutter opening / closing pin 60 moves the HS cartridge 1 to the outside of the cartridge insertion opening 54 of the HS drive 51 in the arrow d direction. Then, during that time, the shutter 24 of the HS cartridge 1 is slid by the shutter spring 29 to the closed position in the arrow b direction.

By the way, when the HS cartridge 1 is inserted into the cartridge insertion opening 54 of the HS drive 51 from the direction of the arrow c, if the HS cartridge 1 is erroneously inserted in the front-rear direction or the vertical direction, the cartridge is The pair of right and left erroneous insertion preventing claws 56 in the holder 55 prohibits the HS cartridge 1 from being inserted. The vertical thickness T ₄ of the pair of left and right erroneous insertion determination notches 40 of the HS cartridge 1 is set to 3.0 mm, and a pair of left and right erroneous insertion determination notches 40 that cover the upper portion of the pair of left and right erroneous insertion determination notches 40 are formed. The thickness T ₅ of the wing portion 41 in the vertical direction is set to 2.0 mm, which is similar to the HS cartridge 1, but
However, erroneous insertion of a 3.5-inch floppy disk cartridge having a thickness of 3.0 mm can be similarly prohibited by the pair of right and left erroneous insertion prevention claws 56.

In the auto-loading type HS drive, as shown by the alternate long and short dash line in FIG. 13, inside the pair of left and right cartridge insertion guides 55b of the cartridge holder 55, behind the pair of left and right erroneous insertion preventing claws 56. A pair of left and right cartridge retracting means 87 are disposed on the side (direction of arrow c), and when the HS cartridge 1 is inserted into the cartridge holder 55 in the correct posture from the direction of arrow c to a certain depth, the pair of left and right cartridges. The retracting means 87 is engaged in the pair of right and left cartridge retracting recesses 42 of the HS cartridge 1, and the HS cartridge 1 is automatically moved by the cartridge retracting means 87 in the cartridge holder 55 to the position shown in FIG. Of the HS cartridge 1 It is configured to perform the door loading operation.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made based on the technical idea of the present invention. For example, the disc-shaped recording medium of the present invention is not limited to the HS disc, but can be applied to various disc-shaped recording media such as MO discs, MD discs, CDs, CD-ROMs, and floppy discs.

[0044]

The disk cartridge of the present invention constructed as described above has the following effects.

The first aspect of the present invention is a shell consisting of upper and lower shells.
Left molded on both sides in the direction of insertion into the disk drive
A pair of right notch for discriminating wrong insertion is located above the bottom of the lower shell.
Notched to a depth that reaches part of the side of the shell,
It is open to the bottom and side of the
It is integrally molded on both sides in the direction of insertion into the disc drive.
The upper and lower notch
On the underside of the pair of left and right wings that cover , the inside of the outer peripheral rib is stealth processed to a thickness approximately the same as the ceiling wall of the upper shell, and when the upper shell is molded with synthetic resin, the pair of left and right wings Since the "shrinkage phenomenon" of synthetic resin does not occur in the parts, it is possible to form an upper shell with a good appearance that does not cause deformation such as dents or distortions on the surface of the upper shell in the pair of left and right wings. As a result, a high quality disc cartridge can be obtained. Even so, the pair of left and right wings can secure sufficient thickness by the outer peripheral ribs to obtain sufficient strength, and since the ceiling wall of the upper shell can be made sufficiently thin, the thickness of the entire shell should be made as thin as possible. You can

According to the second aspect of the present invention, most of the ceiling wall of the upper shell is formed to have a thickness of about 1.2 mm and the pair of left and right wings are formed to have a thickness of about 1.3 mm. By making the thickness of most of the wall extremely thin, the overall thickness of the shell has been made ultra thin, and even when the upper shell is molded with semitransparent synthetic resin, the pair of left and right wings can be seen through. You can prevent you from seeing as much as possible.

Since the plurality of reinforcing ribs are integrally formed inside the outer peripheral ribs of the pair of left and right blades of the upper shell, the strength of the pair of left and right blades can be further improved.

[Brief description of drawings]

FIG. 1 is a perspective view of essential parts for explaining an embodiment of an HS cartridge to which the present invention is applied.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view illustrating a modified example of FIG.

FIG. 4 is a bottom view of the upper shell of the HS cartridge.

FIG. 5 is a plan view of the lower shell of the HS cartridge.

FIG. 6 is a perspective view of the upper surface of the entire HS cartridge.

FIG. 7 is a bottom perspective view of the entire HS cartridge.

8A and 8B are a plan view and a bottom view showing a shutter closed state of the HS cartridge.

9A and 9B are a plan view and a bottom view showing the shutter open state of the HS cartridge.

FIG. 10 is an exploded perspective view of the entire HS cartridge.

FIG. 11 is a perspective view showing an HS cartridge and an HS drive.

FIG. 12 is a plan view illustrating the operation of inserting the HS cartridge into the cartridge holder of the HS drive.

FIG. 13 is a plan view illustrating the end of the inserting operation of the HS cartridge into the cartridge holder.

FIG. 14 is a partially cutaway plan view illustrating an optical pickup and a magnetic field modulation head in the HS drive.

FIG. 15 is a sectional side view of FIG.

[Explanation of symbols]

1 is an HS cartridge (disk cartridge), 2 is an upper shell, 2a is a ceiling wall of the upper shell, 2b is a front edge of the upper shell, 2c is both left and right edges of the upper shell, 3 is a lower shell,
3a is the bottom wall of the lower shell, 3b is the front edge of the lower shell, 3c
Is a left and right side edge of the lower shell, 4 is a shell, 5 is an HS disk (disk-shaped recording medium), 40 is a notch for erroneous insertion determination, 41 is a wing portion, 41a is a lower surface of the wing portion, and 41b is an outer periphery of the wing portion. Ribs, 41c are recesses that have been stealed, and 41d are reinforcing ribs.

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G11B 23/03 604

Claims (4)

(57) [Claims] [1 claim: a shell of the upper and lower shells which are molded of synthetic resin, a disk-shaped recording medium rotatably housed in the shell, are formed on both sides of the insertion direction side to the disk drive of the shell left and right a is-out pair of erroneous insertion discrimination notches, above
From the bottom of the shell below, reach part of the side of the upper shell.
Notched to the depth of 2
When-out erroneous insertion discrimination cutout which is open to the surface, left and right are integrally molded on either side of the insertion direction side to the disk drive of the upper shell, covering the pair of erroneous insertion discrimination cutout top of the lower shell A disk cartridge comprising a pair of wings, wherein the inner surfaces of the outer peripheral ribs on the lower surfaces of the pair of left and right wings of the upper shell are stealed to a thickness approximately equal to the ceiling wall of the upper shell. . 2. A ceiling wall of the upper shell is formed to have a thickness of about 1.2 mm, and a pair of right and left wings of the upper shell is formed to have a thickness of about 1.3 mm. The disk cartridge according to claim 1, wherein 3. The disk cartridge according to claim 1, wherein a plurality of reinforcing ribs are integrally formed inside the outer peripheral ribs of the pair of left and right blades of the upper shell. 4. The length of the pair of left and right cutouts for erroneous insertion discrimination.
Inside the notch for erroneous insertion discrimination in the middle of the direction
A pair of left and right cartridge recesses formed in
Then, from the bottom of the lower shell, reach a part of the upper shell.
Notched to the depth of the bottom of the shell and the left
The two sides, which are the inside of the pair of notches for determining the wrong insertion, are
Equipped with an open cartridge retracting recess, On the lower surface of the pair of left and right wings, the pair of left and right cartri
Reinforcing ribs are integrally formed on the side opening of the recess for recess
2. The disc player according to claim 1, wherein
Tridge.