JP4042374B2 - Disc cartridge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk cartridge in which a disk-shaped recording medium such as an optical disk, a magneto-optical disk, or a magnetic disk is rotatably housed inside a cartridge body.
[0002]
[Prior art]
Conventionally, there is a disk cartridge in which a disk-shaped recording medium such as an optical disk, a magneto-optical disk, or a magnetic disk is rotatably accommodated inside a cartridge body. In general, a disc cartridge can record and / or reproduce information signals such as music signals, video signals, programs, etc., and a disc-shaped recording medium capable of recording such information signals, for example, writing A known recordable disc and a rewritable rewritable disc are known.
[0003]
For example, in the disc cartridge 100 shown in FIG. 30, an optical disc 102 is rotatably accommodated in a cartridge main body 101 constituted by an upper shell 101a and a lower shell 101b. The upper shell 101a and the lower shell 101b include An opening 103 is formed so that a part of the optical disk 102 is exposed to the outside. A shutter member 104 that opens and closes the opening 103 is slidably attached to the cartridge body 101. A chucking plate 105 that is chucked on the turntable of the disk drive device is attached to the center of the optical disk 102.
[0004]
In the disk cartridge 100, when the chucking plate 105 is chucked on the turntable, the optical disk 102 is rotationally driven by the turntable at a predetermined speed (for example, constant angular speed for each zone). Then, the optical pickup of the disk drive device is moved and operated in the radial direction of the optical disk 102 through the opening 103 of the cartridge body 101, whereby information signals are recorded and / or reproduced.
[0005]
[Problems to be solved by the invention]
Incidentally, in the disk cartridge 100 described above, as the capacity of the optical disk 102 increases and the recording density increases, the degree of influence of dust or the like entering the inside of the cartridge body 101 is increasing. That is, when dust or the like enters the inside of the cartridge main body 101, dust or the like adheres to the signal reading surface of the optical disc 102, thereby blocking the light beam from the optical pickup or the signal reading surface of the optical disc 102. As a result, the information signal is not properly recorded and / or reproduced.
[0006]
However, in the disk cartridge 100 described above, the shutter member 104 is slidably attached by fitting the shutter member 104 having a substantially U-shaped cross section outside the cartridge body 101. There is a problem that a gap is likely to be formed between the terminal 104 and the intrusion prevention of dust or the like is insufficient.
[0007]
Further, in such a disc cartridge 100, since the shutter member 104 is attached in a state of being exposed from the cartridge main body 101, the user may accidentally slide the shutter member 104 to open the opening 103. There was this.
[0008]
Further, in such a disc cartridge 100, since the shutter member 104 slides linearly along the end surface of the cartridge main body 101, the ratio of the shutter member 104 to the cartridge main body 101 increases, and the cartridge main body 101 is It was very difficult to reduce the size.
[0009]
In particular, the above-described disc cartridge 100 has a problem that dust or the like enters the inside of the cartridge body 101 during assembly.
[0010]
Specifically, in the disk cartridge 100 described above, the optical disk 102 to which the chucking plate 105 is attached and the upper shell 101a are sequentially stacked from the lower shell 101b, and then the shutter that closes the opening 103 of the cartridge body 101. It is assembled by attaching the member 104. For this reason, the above-described disc cartridge 100 is assembled with the lower shell 101b formed with the opening 103 facing down, which causes a disadvantage that dust and the like enter through the opening 103.
[0011]
Accordingly, the present invention has been proposed in view of such conventional circumstances, and prevents the intrusion of dust and the like into the inside of the cartridge body, and in particular, a disc cartridge that prevents the intrusion of dust and the like during assembly. The purpose is to provide.
[0012]
[Means for Solving the Problems]
A disk cartridge according to the present invention that achieves this object has a disk-shaped recording medium, and an upper shell and a lower shell whose peripheral walls are abutted against each other, and the disk-shaped recording medium is rotatably housed therein. A cartridge body in which at least a part of the peripheral wall of the lower shell is opened, and an opening is formed so that a part of the disk-shaped recording medium faces outward from the open end to the inner and outer circumferences; An intermediate shell that is rotatably supported and has an opening corresponding to the opening of the cartridge body, a position where the opening of the cartridge body is closed by the rotation of the middle shell, and the opening of the cartridge body Slidably housed in a shutter member that moves between a position where the part is opened and a tab housing part formed at one corner of the cartridge body A main body portion held between the peripheral wall on the outer peripheral side of the upper shell and the peripheral wall on the inner peripheral side of the upper shell, and the inner peripheral side of the upper shell. It has the engaging convex part engaged with the level | step-difference part of the thickness direction formed in the surrounding wall.
[0013]
As described above, in the disc cartridge according to the present invention, at least the main body portion of the tab member is held by the tab storage portion formed between the outer peripheral side peripheral wall and the inner peripheral side peripheral wall of the upper shell. Since the mating convex portion is engaged with the step portion in the thickness direction formed on the peripheral wall on the inner peripheral side of the upper shell, the tab member is stably held on the upper shell side during assembly. Therefore, this disc cartridge has a structure suitable for assembling at least a disc-shaped recording medium, an intermediate shell, a shutter member, and a lower shell in order from the upper shell, and an opening is formed. As compared with the case where the cartridges are sequentially stacked and assembled from the lower shell side, it is possible to suppress the entry of dust and the like into the cartridge body.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a disk cartridge to which the present invention is applied will be described in detail with reference to the drawings.
[0015]
As shown in FIGS. 1 to 4, a disc cartridge 1 to which the present invention is applied includes an optical disc 3 that is a disc-shaped recording medium, an inner rotor 4 that is a middle shell, and a pair of shutter members inside a cartridge body 2. 5a, 5b.
[0016]
The cartridge body 2 has a pair of an upper shell 6 and a lower shell 7 that are combined with each other.
[0017]
As shown in FIGS. 1, 4 and 5, the upper shell 6 is formed by injection molding a resin material having thermoplasticity such as acrylonitrile, butadiene, styrene (ABS). The upper shell 6 has a generally arcuate front edge that is inserted into a disk drive device 70 to be described later, out of the substantially rectangular main surface. Further, an outer peripheral wall 8 forming a side surface portion of the cartridge main body 2 is erected on the upper shell 6 along the outer peripheral edge portion of the main surface.
[0018]
The outer peripheral wall 8 is positioned at the front central portion, the first pickup entry recess 9 for entering an optical pickup 79 of the disk drive device 70 described later, and the rear central portion. The positioning recess 10 for positioning with the lower shell 8 is cut out with a predetermined width.
[0019]
Further, on the inner peripheral side of the outer peripheral wall 8, a substantially annular inner peripheral wall 11 that forms a disk storage portion is provided upright. The inner peripheral wall 11 is formed with a second pickup entry recess 12 notched with a predetermined width for entering an optical pickup 79 of a disk drive device 70, which will be described later, located in the center on the front side. Yes.
[0020]
A substantially annular guide groove 13 is formed on the outer peripheral side of the inner peripheral wall 11 so as to surround the inner peripheral wall 11. The inner rotor 4 is rotatably engaged with the guide groove 13. Further, a pair of lift-up convex portions for moving the inner rotor 4 in a direction away from the upper shell 6 is located on the bottom surface of the guide groove 13 at the center on the front side and the center on the back side. 14 is protrudingly formed.
[0021]
Further, the upper shell 6 is located at the remaining corner portions 6b, 6c, 6d except for the one corner portion 6a on the front side forming the lock storage portion among the corner portions 6a, 6b, 6c, 6d. Further, upper corner peripheral walls 15 for preventing entry of dust and the like are respectively erected. The upper corner peripheral wall 15 is formed between the outer peripheral wall 8 and the guide groove 13 so as to surround the periphery. Further, a first groove portion 16 is formed between the upper corner peripheral wall 15 and the outer peripheral wall 8, and a second groove portion 17 is formed between the upper corner peripheral wall 15 and the guide groove 13. Has been.
[0022]
Further, the upper shell 6 is provided with an upper tab peripheral wall 18, which forms a tab storage portion, standing on the rear corner 1 c opposite to the front corner 6 a. The upper tab peripheral wall 18 is formed between the outer peripheral wall 8 and the upper corner peripheral wall 15 so as to surround the one corner portion 6 c on the back side together with the outer peripheral wall 8. Further, a third groove portion 19 is formed between the upper tab peripheral wall 18 and the upper corner peripheral wall 15.
[0023]
Further, the upper shell 6 is formed with a substantially cylindrical positioning pin 20 protruding in the vicinity of each corner portion 6a, 6b, 6c, 6d, and screwed into the central portion of the positioning pin 20 A hole is formed.
[0024]
On the other hand, as shown in FIGS. 2, 3 and 6, the lower shell 7 is injection-molded with a resin material having thermoplasticity, such as acrylonitrile, butadiene, styrene (ABS), as in the case of the upper shell 6 described above. It is formed by. The lower shell 7 has a substantially arcuate front edge that is inserted into a disk drive device to be described later, out of the substantially rectangular main surface. In addition, an outer peripheral wall 21 that forms a side surface portion of the cartridge main body is erected on the lower shell 7 along an outer peripheral edge portion of the main surface.
[0025]
Further, the positioning peripheral wall 22 for positioning the upper shell 6 and the lower shell 7 by being engaged with the positioning recess 10 on the upper shell 6 side described above on the front end surface of the outer peripheral wall 21, and the upper surface described above. A dust-proof peripheral wall 23 that prevents dust and the like from entering between the upper shell 6 and the lower shell 7 is provided upright by being engaged with the first groove 16 on the shell 6 side.
[0026]
In the lower shell 7, a central portion on the front side of the outer peripheral wall 21 is opened with a predetermined width, and a substantially rectangular opening in which a part of the optical disk 3 faces outward from the open end over the inner and outer peripheries. A portion 24a and a substantially circular opening 24b with the central hole 3a of the optical disc 3 facing outward are continuously formed. That is, the lower shell 7 includes a recording / reproducing opening 24a large enough to allow an optical pickup of a disk drive device described later to enter the inside of the cartridge body 2, and a turntable of the disk drive device 70 described later. A driving opening 24b large enough to allow 78 to enter the inside of the cartridge main body 2 is formed as one opening 24 in which the central portion on the front side of the outer peripheral wall 21 is opened. The first and second pick-up entry recesses 9 and 12 of the upper shell 6 described above have a width substantially coincident with the opening 24.
[0027]
The lower shell 7 is positioned at one of the corners 7a on the front surface side that forms the lock storage portion among the corners 7a, 7b, 7c, and 7d, and supports a lock member 29, which will be described later, in a rotatable manner. The supporting shaft 25 is formed so as to protrude. The remaining corner portions 7b, 7c, and 7d except for the one corner portion 7a on the front surface side are substantially arc-shaped lower corner peripheral walls engaged with the second groove portion 17 of the upper shell 6 described above. 26 is erected. Furthermore, a lower tab peripheral wall 27 that is engaged with the third groove portion 19 of the above-described upper shell 6 is erected on the one corner portion 7c on the back surface opposite to the one corner portion 7a on the front surface side.
[0028]
The lower shell 7 is formed with a substantially cylindrical positioning cap 28 that is fitted to the positioning pin 20 of the above-described upper shell 6. A through hole is formed in the bottom surface of the positioning cap 28. It is installed.
[0029]
The cartridge main body 2 is configured by overlapping the above-described upper shell 6 and lower shell 7 with the outer peripheral walls 8 and 21 abutting each other.
[0030]
At this time, the positioning recess 10 on the upper shell 6 side and the positioning peripheral wall 22 on the lower shell 7 side are engaged. Further, the positioning pin 20 on the upper shell 6 side and the positioning cap 28 on the lower shell 7 side are fitted, and a fixing screw (not shown) is passed through the through hole of the positioning cap 28 in the screwing hole of the positioning pin 20. Screwed together. Further, the first groove 16, the second groove 17, and the third groove 19 on the upper shell 6 side are respectively associated with a dustproof peripheral wall 23, a lower corner peripheral wall 26, and a lower tab peripheral wall 27 on the lower shell 7 side. Combined.
[0031]
Here, as shown in FIG. 7, the height of the outer peripheral wall 8 on the upper shell 6 side is H1, the height of the outer peripheral wall 21 on the lower shell 7 side is H2, and the internal height of the cartridge body 2 is H3. When (H3 = H1 + H2), the upper corner peripheral wall 15 and the lower corner peripheral wall 26, and the upper tab peripheral wall 18 and the lower tab peripheral wall 27 are each formed at a height H3. The dust-proof peripheral wall 23 is formed at a height H1, and the clearance C on the inner peripheral side between the dust-proof peripheral wall 23 and the first groove 16 is 0.1 mm or more and 0.5 mm or less. Thereby, intrusion of dust or the like can be prevented without impairing the assembling property between the upper shell 6 and the lower shell 7.
[0032]
As described above, in the cartridge main body 2, the abutting surface S between the upper shell 6 and the lower shell 7 is formed in a crank shape, so that the cartridge body 2 is interposed between the outer peripheral wall 8 on the upper shell 6 side and the outer peripheral wall 21 on the lower shell 7 side. It is possible to reliably prevent dust and the like from entering.
[0033]
As shown in FIGS. 1 to 4, the cartridge body 2 has a disk storage portion in which the optical disk 3 is rotatably stored in the center portion by overlapping the upper shell 6 and the lower shell 7. In addition, a lock storage portion in which the lock member 29 is rotatably stored is formed in one corner portion on the front side, and a tab storage portion in which the tab member 30 is slidably stored in one corner portion on the back side. The
[0034]
The lock member 29 is for locking the rotation of the inner rotor 4 when the inner rotor 4 is in a closed position where the opening 24 of the cartridge body 2 is closed.
[0035]
Specifically, the lock member 29 is engaged with an engagement hole 31 that is rotatably engaged with the support shaft 25 of the lower shell 7, and extends from the engagement hole 31 toward one side surface of the cartridge body 2. The operation piece 32, the stopper piece 33 extended from the engagement hole 31 toward the disk storage portion, and the spring extended from the engagement hole 31 toward the inner surface on the front side of the cartridge body 2. One piece 34 is provided.
[0036]
At the distal end of the operation piece 32, there is provided an operation projection 32a that faces the outside from a lock opening 35a formed on one side surface of the cartridge body 2. In addition, a stopper convex portion 33 a that is slidably contacted with a ring portion 43 of the inner rotor 4 described later is provided at the distal end portion of the stopper piece portion 33. The spring piece portion 34 is in contact with the inner surface of the front surface side of the cartridge main body 2 in a state of being elastically displaced.
[0037]
Therefore, the lock member 29 has a direction in which the operation projection 32 a of the operation piece 32 protrudes from the locking opening 35 a by the elastic force of the spring piece 34, and the stopper projection 33 a of the stopper piece 33 has the inner rotor 4. It is urged in the direction in which the ring portion 43 abuts. In the lock member 29, the stopper piece 33 is separated from the ring portion 43 of the inner rotor 4 against the urging force of the spring piece portion 34 when the operation convex portion 32 a of the operation piece portion 32 is pressed. Rocks in the direction.
[0038]
The tab member 30 is for preventing an erroneous erasure of an information signal recorded on the optical disc 3.
[0039]
Specifically, as shown in FIGS. 25 and 26, the tab member 30 is located at one corner 6 c on the back side of the upper shell 6, and between the outer peripheral wall 8 on the back side and the upper tab peripheral wall 18. The main body 81 held by the main body 81, the engaging convex portion 82 and the switching elastic convex portion 83 projecting from the main body portion 81 toward the upper tab peripheral wall 18, and the outer peripheral wall 8 on the back side from the main body portion 81. A slide operation convex portion 84 projecting toward the side, a slide convex plate portion 85 projecting from the main body portion 81 toward the outer peripheral wall 8 on the side surface, and a projecting portion projecting from the main body portion 81 toward the lower shell 7 side. And a guide convex portion 86.
[0040]
Of these, the main body 81 has a length that is substantially half the length of the tab storage portion in the sliding direction, a width that is slidably contacted with the outer peripheral wall 8 on the back side and the upper tab peripheral wall 18, and the upper shell 6. It has a height that is in sliding contact with the lower shell 7 and is formed in a substantially quadrangular prism shape.
[0041]
The engaging convex portion 82 is formed to protrude on the upper tab peripheral wall 18 side with a predetermined thickness and height while forming a surface that is continuous with the surface that is in sliding contact with the lower shell 7 of the main body portion 81. . On the other hand, as shown in FIGS. 25 and 27, the upper tab peripheral wall 18 is formed with a stepped portion 87 that is engaged with the engaging convex portion 82 of the tab member 30 by notching the front end surface in the thickness direction. ing. The stepped portion 87 is formed along the sliding direction of the tab storage portion. Therefore, the engaging projection 82 slides in a state in which the engagement with the stepped portion 87 is maintained while being in sliding contact with the stepped portion 87.
[0042]
As shown in FIGS. 25 and 26, the switching elastic convex portion 83 is elastic in the direction of approaching and separating from the upper tab peripheral wall 18 from a substantially central portion of the surface of the main body 81 that is in sliding contact with the upper tab peripheral wall 18. The protrusion is formed in a displaceable state. On the other hand, the surface of the upper tab peripheral wall 18 that is slidably contacted with the tab member 30 is switched when the tab member 30 is positioned at both ends in the sliding direction of the tab storage portion, as shown in FIGS. A pair of switching recesses 88 that are selectively engaged with the elastic projections 83 are formed.
[0043]
As shown in FIGS. 25 and 26, the slide operation convex portion 84 has a predetermined length in the thickness direction, and from the surface that is in sliding contact with the outer peripheral wall 8 of the main body portion 81, the slide convex plate portion 85 and Is formed in a protruding manner in the vicinity of the opposite end. On the other hand, a tab opening (not shown) is formed on the side surface on the back side of the cartridge body 2 so that the slide operation convex portion 84 faces the outside. For this reason, as shown in FIGS. 25 and 27, an upper notch 89 that forms the tab opening is formed in the outer peripheral wall 8 on the back side. Similarly, a lower notch for forming a tab opening is also formed in the peripheral wall 21 on the back side of the lower shell 7. The tab opening has a length corresponding to the sliding amount of the tab member 30, that is, a length sufficient for the switching elastic convex portion 83 to move between the pair of switching concave portions 88 described above.
[0044]
As shown in FIGS. 25 and 26, the slide piece portion 85 is directed toward the outer peripheral wall 8 on the side surface side while forming a surface continuous with the surface that is in sliding contact with the outer peripheral wall 8 on the back surface side of the main body portion 81. The protrusion is formed to have a predetermined height and thickness. That is, the tab member 30 has a slide piece portion 85 protruding from the main body portion 81 toward the outer peripheral wall 8 on the side surface, so that the surface that is in sliding contact with the outer peripheral wall 8 on the back surface side together with the main body portion 81 is provided. The tab opening is formed with a length and a width sufficient to close the tab opening. On the other hand, as shown in FIGS. 25 and 27, when the tab member 30 is located at the end on the side where the tab opening is opened, between the outer peripheral wall 8 on the back side and the upper tab peripheral wall 8, A guide recess 90 that is engaged with the slide piece 85 is formed.
[0045]
As shown in FIGS. 25 and 26, the guide convex portion 86 has a substantially columnar shape, and is formed to protrude at a predetermined height from a substantially central portion of a surface that is in sliding contact with the lower shell 7. On the other hand, as shown in FIGS. 3 and 6, the lower shell 7 is formed with a guide hole 91 through which the guide protrusion 86 faces the outside. The guide hole 91 is formed in a length corresponding to the sliding amount of the tab member 30, that is, a length sufficient for the switching elastic convex portion 83 to move between the pair of switching concave portions 88 described above.
[0046]
The tab member 30 is slid when the slide operation convex portion 84 is operated, and the switching elastic convex portion 83 is selectively engaged with any one of the pair of switching concave portions 88, whereby the tab opening portion is formed. It is slid between a position for opening and a position for closing. Thereby, it is possible to switch whether or not an information signal can be recorded on the optical disc 3.
[0047]
Specifically, as a method of reading the state of whether or not recording on the optical disk 3 is possible in the disk drive device 70 described later, there is a method of reading the open / closed state of the tab opening described above. Apart from this, it is also possible to read from the position of the guide projection 86 that slides in the guide hole 91 described above.
[0048]
That is, in the disk cartridge 1, the position of the main body 81 that closes the guide hole 91 is switched by switching the position of the guide convex portion 86 that slides in the guide hole 91 described above.
[0049]
In this case, when the guide convex portion 86 is positioned at one end portion of the guide hole 91, the main body portion 81 closes substantially half of one side of the guide hole 91, so that substantially half of the other side of the guide hole 91 is opened. It will be in the state. Conversely, when the guide convex portion 86 is positioned at the other end of the guide hole 91, the main body portion 81 closes approximately half of the other side of the guide hole 91, thereby opening approximately half of the one side of the guide hole 91. It will be in the state.
[0050]
Therefore, in this disc cartridge 1, it is possible to read the state of whether recording is possible on the optical disc 3 by reading the position where the guide hole 91 is opened. Further, in this disc cartridge 1, new information other than this can be added by combining the position where the guide hole 91 is opened and the open / closed state of the tab opening.
[0051]
The tab member 30 has at least a body portion 81 held between the outer peripheral wall 8 on the back side and the upper tab peripheral wall 18, and an engaging convex portion 82 formed in the upper tab peripheral wall 18 in the thickness direction. Since it is slidably engaged with the stepped portion 87, it can be stably slid within the tab storage portion.
[0052]
Further, the tab member 30 is in a state in which the switching elastic convex portion 83 located on the opposite side of the slide operation convex portion 84 is always pressed to the upper tab peripheral wall 18 side by sliding the slide operation convex portion 84. Therefore, the switching elastic convex portion 83 can be appropriately engaged with the pair of switching concave portions 88.
[0053]
Further, the tab member 30 is stably held in the sliding direction by the slide piece portion 85 being engaged with the guide concave portion 90, and the engaging convex portion 82 described above is provided with the step portion 87 and the lower shell 7. Therefore, a stable sliding operation is possible in the tab storage portion.
[0054]
On one side surface of the cartridge body 2, a guide groove 36 is formed in the front-rear direction for the purpose of preventing erroneous insertion when the disk cartridge 1 is mounted in a disk drive device 70 described later. Further, on the bottom surface portion of the guide groove 36, the operation opening 32a of the lock member 29 described above, in order from the front surface side, and a part of the outer peripheral portion of the inner rotor 4 are exposed to the outside. A facing rotor opening 35b is formed.
[0055]
In addition, a transmission window 37 is provided on the upper surface of the cartridge body 2 so that the optical disk 3 accommodated therein can be visually recognized. A plurality of positioning recesses 38 are provided on the lower surface of the cartridge main body 2 for positioning when the cartridge body 2 is mounted on a disk drive device 70 described later. Furthermore, a plurality of notches 39 are provided on both side surfaces of the cartridge main body 2 for positioning when the disk cartridge 1 is mounted on a disk drive device to be described later, discriminating the type of the disk cartridge, and the like.
[0056]
As shown in FIGS. 2 and 4, the optical disk 3 has a substantially disk shape with a center hole 3 a formed in the center, and is rotatably accommodated in the cartridge body 2 described above. The central portion of the optical disk 3 is pressed by the chucking plate 40 when it is chucked on a turntable 78 of a disk drive device 70 described later.
[0057]
The chucking plate 40 is formed of a substantially disk-shaped metal material that is attracted by a magnet, and a central portion of the chucking plate 40 bulges to form a disc pressing portion 40a that presses the central portion of the optical disc 3. ing.
[0058]
On the other hand, a plate storage recess 41 for rotatably storing the chuck plate 40 is formed at the center of the upper shell 6. In addition, a plate presser 42 for holding the chucking plate 40 is attached to the plate storage recess 41 in a state in which it is fitted. The plate presser 42 is engaged with a fitting hole 42a into which the disc pressing part 40a of the chucking plate 40 is fitted at the center, and an outer peripheral part of the chucking plate 40 so as to surround the fitting hole 42a. Engaging recesses 42b are formed.
[0059]
Therefore, as shown in FIG. 8, the chucking plate 40 has a disk pressing portion 40 a protruding from the fitting hole 42 a of the plate presser 42, and can be rotated into an internal space formed by the plate storage recess 41 and the plate presser 42. It is stored.
[0060]
The optical disk 3 is a reproduction-only optical disk on which various information signals such as a music signal as audio information, a video signal as video information, and a music signal are recorded in advance, or these information signals are written only once. And a recordable optical disk that can be rewritten, and a rewritable optical disk that can rewrite such information repeatedly. Further, examples of the disk-shaped recording medium include a magneto-optical disk and a magnetic disk in addition to the optical disk 3 described above.
[0061]
As shown in FIGS. 2 and 4, the inner rotor 4 is formed by injection molding a resin material having thermoplasticity such as polyoxymethylene (POM). The inner rotor 4 is formed in a substantially disk shape, and a substantially annular ring portion 43 that is engaged with the guide groove 13 of the upper shell 6 is provided upright on the outer peripheral edge portion thereof. The inner rotor 4 is supported so as to be rotatable with respect to the cartridge body 2 by engaging the ring portion 43 with the guide groove 13 of the upper shell 6.
[0062]
Further, the inner rotor 4 has a connecting portion 43a engaged with the guide groove 13 of the upper shell 6, and a part of the ring portion 43 is opened. From the open end connected by the connecting portion 43a, the cartridge body An opening 44 having a shape substantially coinciding with the two openings 24 is formed. In other words, the openings 44 of the ring portion 43 are connected by the connecting portion 43a.
[0063]
A gear portion 45 for rotating the inner rotor 4 is formed on the outer peripheral surface of the ring portion 43. When the inner rotor 4 shown in FIG. 9 is in the closed position, the gear portion 45 has a position facing the outside from the front side of the rotor opening 35b described above, and the inner rotor 4 shown in FIG. 10 is in the open position. Sometimes, it is formed over a region between a position facing the outside from the back side of the rotor opening 35b described above.
[0064]
In addition, a pair of stopper convex portions 46a and 46b for restricting the amount of rotation of the inner rotor 4 are formed on the outer peripheral surface of the ring portion 43 so as to protrude from each other at a predetermined interval. On the other hand, the upper shell 6 is formed with a pair of stopper receiving portions 47a and 47b that are positioned between the guide groove 13 and the upper corner peripheral wall 15 and abut against the pair of stopper convex portions 46a and 46b. . Then, as shown in FIG. 10, when the inner rotor 4 rotates in one direction (clockwise in the drawing), one of the stopper convex portions 46 a comes into contact with one of the stopper receiving portions 47 a, and the inner rotor 4 is further increased. Rotation is prevented. At this time, the inner rotor 4 is in the open position, and the opening 44 of the inner rotor 4 and the opening 24 of the cartridge main body 2 are substantially aligned. On the other hand, as shown in FIG. 9, when the inner rotor 4 rotates in the other direction (counterclockwise on the paper surface), the other stopper convex portion 46 b comes into contact with the other stopper receiving portion 47 b, and the inner rotor 4 further rotates. Is prevented from rotating. At this time, the inner rotor 4 is in the closed position, and the opening 44 of the inner rotor 4 is most inclined with respect to the opening 24 of the cartridge body 2.
[0065]
Further, as shown in FIGS. 9 and 10, a pair of lift-up convex portions 48 slidably in contact with the pair of lift-up convex portions 14 of the guide groove 13 described above protrude from the tip surface of the ring portion 43. Is formed. When the inner rotor 4 is positioned in the immediate vicinity of the closed position, the lift-up convex portion 48 rides on the lift-up convex portion 14 of the guide groove 13 so as to slide away from the upper shell 6. It is lifted in the direction to do.
[0066]
Further, as shown in FIG. 4, the inner rotor 4 is located on the main surface opposite to the side from which the ring portion 43 protrudes, and a pair of rotatably supporting the pair of shutter members 5 a and 5 b. The support shafts 49a and 49b are formed to protrude. The pair of support shafts are arranged in a point-symmetrical position with respect to the central portion of the inner rotor, that is, with a phase difference of 180 ° from each other.
[0067]
On the other hand, as shown in FIGS. 11 and 12, the pair of shutter members 5a and 5b have a point-symmetric shape with respect to each other, and 180 ° about the pair of support shafts 49a and 49b of the inner rotor 4. Attached so as to be rotatable with a phase difference. Note that equivalent portions of the pair of shutter members 5a and 5b are collectively described as the shutter member 5 and are denoted by the same reference numerals in the drawings.
[0068]
The shutter member 5 is formed by injection-molding a resin material having thermoplasticity such as polyoxymethylene (POM), like the inner rotor 4 described above.
[0069]
The shutter member 5 is formed in a substantially semicircular flat plate shape, and engagement holes 50a and 50b that are rotatably engaged with the support shafts 49a and 49b of the inner rotor 4 described above are formed at the base end portion. Is formed.
[0070]
In addition, the chord line portion that becomes the butting surfaces of the pair of shutter members 5 includes a first contact surface portion 51 from the center portion toward the base end portion, and a second contact surface portion from the center portion toward the distal end portion. 52 is formed. Among these, the first contact surface portion 51 has an inclined surface on the lower shell 7 side, and the second contact surface portion 52 has an inclined surface on the upper shell 6 side. Then, as shown in FIGS. 13 and 14, the pair of shutter members 5a and 5b is rotated in the direction of approaching and separating from each other about the support shafts 49a and 49b of the inner rotor 4, thereby providing one shutter. The first contact surface portion 51 of the member 5a and the second contact surface portion 52 of the other shutter member 5b are engaged, and the first contact surface portion 51 of the other shutter member 5b and the one shutter member. 5a 2nd contact surface part 52 is engaged.
[0071]
Further, the shutter member 5 is formed with long holes 54 that are respectively engaged with a pair of guide pins 53 protruding from the inner surface of the lower shell 7 shown in FIG. The long hole 54 is formed with a predetermined length from the middle part of the arc line portion toward the engagement holes 50a and 50b so that the shutter member 5 is rotated between the closed position and the open position. . Further, an engaging portion 55 to which the guide pin 53 of the lower shell 7 is engaged when the shutter member 5 is in the closed position, and an engaging portion 55 are engaged with the outer peripheral end of the long hole 54. An elastic piece 56 that presses the combined guide pin 53 is formed.
[0072]
By the way, the disc cartridge 1 is provided with a dust intrusion prevention unit for preventing dust and the like from entering between the opening 24 of the cartridge body 2 and the pair of shutter members 5a and 5b.
[0073]
Specifically, the dust intrusion prevention portion is engaged with the rib-like convex portion 57 surrounding the opening 24 on the lower shell 7 side shown in FIG. 6 and the rib-like convex portion 57 on the shutter member 5 side shown in FIG. And a groove-like recess 58 to be joined.
[0074]
The rib-shaped convex portion 57 is formed to protrude in a substantially planar H shape so as to surround the opening 24 on the inner surface of the lower shell 7. Further, the rib-like convex portion 57 has four tall portions 57a, 57b, 57c, and 57d that are formed with high portions connected to the outer peripheral wall 21 on the front side and the back side, respectively. The rib-like convex portion 57 is formed with a height of about 0.5 mm, for example, and the four tall portions 57a, 57b, 57c, and 57d are formed several times higher than the height.
[0075]
On the other hand, the groove-shaped recess 58 is formed on the main surface on the lower shell 7 side of the shutter member 5 with a shape and depth corresponding to the rib-shaped protrusion 57. When the shutter member 5 is in the closed position, the rib-shaped convex portion 57 is fitted into the groove-shaped concave portion 58.
[0076]
Further, as shown in FIGS. 4, 9, and 10, the inner rotor 4 has a substantially trapezoidal release convex portion 59 that protrudes from the pair of support shafts 49 a and 49 b. . The release convex portion 59 is formed at a height substantially equal to the rib-shaped convex portion 57, and when the shutter member 5 moves from the closed position to the open position, the rib-shaped convex portion 57 and the groove-shaped convex portion 57 are formed. The fitting with the recess 58 is released.
[0077]
Here, the end portions in the width direction of the rib-like convex portions 57 and the groove-like concave portions 58 that are engaged with each other are inclined surfaces as shown in FIG. 15, and the shutter member 5 is moved from the closed position to the open position. When moving, the rib-like convex portion 57 is easily pulled out from the groove-like concave portion 58.
[0078]
11 and 12, when the pair of shutter members 5a and 5b are in the closed position, the rib-shaped convex portion 57 includes the tall portions 57a and 57c, respectively. A first closing piece portion 60a to be in contact with and a second closing piece portion 60b to be in contact with the tall portions 57b and 57d are formed to protrude. Further, the shutter member 5 is formed with a notch 61 for introducing the tall portion 57b and the tall portion 57d of the rib-like convex portion 57, which is located on the distal end side of the second contact surface portion 52. ing. As shown in FIGS. 13 to 15, the shutter member 5 has a labyrinth-shaped uneven pattern 62 formed on the main surface on the lower shell 7 side.
[0079]
In this dust intrusion prevention portion, the groove-like concave portion 58 on the shutter member 5 side is fitted with the rib-like convex portion 57 on the lower shell 7 side, so that the opening 24 of the cartridge body 2 and the pair of shutter members 5a, It is possible to reliably prevent dust and the like from entering between 5b.
[0080]
A method for assembling the disk cartridge 1 configured as described above will be described.
[0081]
When the disk cartridge 1 is assembled, first, the disk shell 1 is arranged with the inner surface side of the upper shell 6 facing upward. Then, after the chucking plate 40 is stored in the plate storage recess 41 of the upper shell 6 with the disk pressing portion 40a facing upward, the plate is pressed with the disk pressing portion 40a fitted through the fitting hole 42a. The presser 42 is attached to the plate storage portion 41 with an adhesive or the like. As a result, the chucking plate 40 is rotatably accommodated in the internal space formed by the plate accommodating recess 41 and the plate retainer 42 while the disc pressing portion 40a protrudes from the fitting hole 42a of the plate retainer 42.
[0082]
Next, the optical disk 3 is stored inside the inner peripheral wall 11 forming the disk storage portion of the upper shell 6.
[0083]
Next, the ring portion 43 of the inner rotor 4 is engaged with the guide groove 13 of the upper shell 6 so as to cover the optical disk 3. Thus, the optical disk 3 is rotatably stored in a disk storage portion formed between the upper shell 6 and the inner rotor 4. Further, the inner rotor 4 is aligned with the upper shell 6 in advance so that the opening 44 of the inner rotor 4 and the first and second pickup entry recesses 9 and 12 of the upper shell 6 coincide.
[0084]
Next, a pair of shutter members 5 a and 5 b is attached to the inner rotor 4. Specifically, the engagement holes 50a and 50b are engaged with the support shafts 49a and 49b of the inner rotor 4 with the butting surfaces of the pair of shutter members 5a and 5b facing each other. Accordingly, the pair of shutter members 5a and 5b are attached so as to be rotatable about the support shafts 49a and 49b of the inner rotor 4. In addition, the pair of shutter members 5a and 5b are aligned with the inner rotor 4 in advance so that the abutting surfaces of the pair of shutter members 5a and 5b are aligned with the edge of the opening 44 of the inner rotor 4. Further, at the same time or before and after this, the lock member 29 is attached to the support shaft 25 of the lock storage portion, and the tab member 30 is stored inside the tab storage portion.
[0085]
Here, the tab member 30 is housed in the tab housing portion on the upper shell 6 side. Specifically, as shown in FIGS. 28 and 29, the tab member 30 has a main body 81 held between the outer peripheral wall 8 on the back side of the upper shell 6 and the upper tab peripheral wall 18 and is engaged. Since the convex part 82 is engaged with the step part 87 in the thickness direction formed on the upper tab peripheral wall 18, the tab member 30 is stably held on the upper shell 6 side during assembly.
[0086]
Next, the lower shell 7 is overlaid on the upper shell 6. At this time, the positioning shell 10 on the upper shell 6 side and the positioning peripheral wall 22 on the lower shell 7 side are engaged in a state where the upper shell 6 and the lower shell 7 abut each other on the outer peripheral walls 8 and 21. Further, the positioning pin 20 on the upper shell 6 side and the positioning cap 28 on the lower shell 7 side are fitted. Further, the first groove 16, the second groove 17, and the third groove 19 on the upper shell 6 side are respectively associated with a dustproof peripheral wall 23, a lower corner peripheral wall 26, and a lower tab peripheral wall 27 on the lower shell 7 side. Combined.
[0087]
Further, the guide pin 53 on the lower shell 7 side is engaged with the long hole 54 of the shutter member 5. In this case, by previously aligning the pair of shutter members 5a and 5b with respect to the inner rotor 4 described above, it is possible to easily align the lower shell 7 and the pair of shutter members 5a and 5b. Then, a fixing screw (not shown) is screwed into the screwing hole of the positioning pin 20 through the through hole of the positioning cap 28. Thereby, the lower shell 7 is fixed to the upper shell 6 and the cartridge body 2 is configured. At this time, the inner rotor 4 and the pair of shutter members 5a and 5b are in an open position, and a part of the optical disk 3 faces the outside from the opening 24 of the cartridge body 2.
[0088]
Next, the gear portion 45 is operated from this state to rotate the inner rotor 4 in the other direction, so that the pair of shutter members 5a and 5b closes the opening 24 of the cartridge body 2. Thus, the assembly operation of the disk cartridge 1 is completed.
[0089]
Thus, in the disc cartridge 1 to which the present invention is applied, the number of components used is small, and the assembling operation can be performed very easily.
[0090]
The disc cartridge 1 has a structure suitable for assembling the optical disc 3, the inner rotor 4, the pair of shutter members 5 a and 5 b, and the lower shell 7 in order from the upper shell 6. . Specifically, in the cartridge 1, the tab member 30 that has been conventionally stored on the lower shell 7 side can be stably stored in the tab storage portion on the upper shell 6 side during assembly.
[0091]
Therefore, this disc cartridge 1 has a structure suitable for being assembled in order from the upper shell 7 side, so that it is assembled in order from the lower shell 7 side where the opening 24 is formed. In comparison, it is possible to significantly suppress the entry of dust and the like into the cartridge body 2.
[0092]
Further, in the disk cartridge 1, when the upper shell 6 and the lower shell 7 are overlapped with each other, warpage, a gap, and the like hardly occur, and the tab member 30 stored in the lock storage portion can be appropriately slid. is there.
[0093]
Further, in this disk cartridge 1, the above-described first groove 16, the second groove 17, and the third groove 19 on the upper shell 6 side are provided with a dust-proof peripheral wall 23, a lower corner peripheral wall 26, and a lower groove on the lower shell 7 side. By engaging the side tab peripheral walls 27 with each other, the tab storage portion is firmly formed. Therefore, the lock member 30 is not easily affected by the outside, and the switching elastic convex portion 83 and the pair of switching concave portions 88 can be appropriately engaged, so that a stable click feeling and locking force can be obtained. Is possible.
[0094]
The method of fixing the lower shell 7 to the upper shell 6 is not limited to the fixing means such as the fixing screw described above, and the upper shell 6 and the lower shell 7 can be joined and integrated using an adhesive or the like. is there.
[0095]
In the disk cartridge 1 configured as described above, information signals are recorded and / or reproduced on the optical disk 3 by using a disk drive device 70 as shown in FIG.
[0096]
The disk drive device 70 includes an outer case 71 made of a hollow casing and a main body (not shown) housed in the outer case 17. A case main body 72 opened to the front surface, a case lid 73 detachably attached to the upper portion so as to close the upper surface of the case main body 72, and a front portion for closing the front surfaces of the case main body 72 and the case lid 72. The front panel 74 and the like are detachably attached.
[0097]
In addition, legs 72a projecting downward are provided at four locations of the case body, and the disk drive device 70 is supported by these legs 72a. The front panel 74 is made of a horizontally long flat plate member, and a horizontally long cartridge insertion / removal opening 75 is provided on the front panel 74. The cartridge insertion / removal port 75 is formed to have a size substantially the same as the size of the front side of the disk cartridge 1. Further, the cartridge insertion / removal port 75 is closed by an opening / closing door 76 disposed inside the cartridge insertion / removal port 75.
[0098]
When inserting the disk cartridge 1 into the disk drive device 70, the disk cartridge 1 is automatically taken in by a loading mechanism (not shown) by inserting the door to a predetermined position while pressing the opening / closing door on the front surface of the disk cartridge 1. It is. The disk cartridge 1 is placed on the chassis with a plurality of positioning recesses 38 fitted to a plurality of positioning pins protruding on the chassis in the disk drive device 70 (not shown). .
[0099]
At the same time or before and after this, the inner rotor 4 is rotated in one direction by a shutter opening / closing mechanism (not shown) provided in the disk drive device 70, and the pair of shutter members 5 a and 5 b are opened in the cartridge body 2. 24 is opened.
[0100]
Specifically, when the disk cartridge 1 is inserted from the disk insertion / removal opening 75 to a predetermined position, first, a rack rod 77 of a shutter opening / closing mechanism is provided on one side surface of the cartridge body 2 as shown in FIG. Guided by the guide groove 36, the operation projection 32a of the lock member 29 protruding from the lock opening 35a is pressed. Thereby, the locked state of the lock member 29 with respect to the inner rotor 4 is released. When the rack rod 77 further enters, the rack rod 77 is inserted into the rotor opening 35b, and the gear portion 77a provided on the rack rod 77 and the gear portion 45 of the inner rotor 4 are engaged with each other.
[0101]
At this time, since the opening 44 of the inner rotor 4 is most inclined with respect to the opening 24 of the cartridge body 2, the overlapping portion where the openings 24 and 44 overlap is opened. The overlapping portion is closed by a pair of shutter members 5a and 5b.
[0102]
Next, as shown in FIG. 18, when the rack rod 77 enters according to the disk cartridge insertion operation, the inner rotor 4 is brought together by the meshing of the gear portion 77 a of the rack rod 77 and the gear portion 45 of the inner rotor 4. Rotated in the direction of.
[0103]
By the way, in the initial state where the inner rotor 4 starts rotating, as shown in FIG. 18, the lift-up convex portion 48 on the inner rotor 4 side rides on the lift-up convex portion 14 on the guide groove 13 side, The shutter member 5 is sandwiched between the rotor 4 and the lower shell 7. For this reason, a relatively large force is required for the rotation operation of the inner rotor 4.
[0104]
Then, as shown in FIG. 19, the inner rotor 4 is rotated in one direction against the frictional force caused by the lift-up convex portions 14 and 48 riding on each other. Thereby, the mutual engagement of the lift-up convex portions 14 and 48 is released and the frictional force is reduced, whereby the inner rotor 4 can be rotated smoothly and with a weak force.
[0105]
Further, when the inner rotor 4 rotates in one direction, the release convex portion 59 rides on the tall portions 57 a and 57 c of the rib-shaped convex portion 57 and the inner rotor 4 is lifted with respect to the lower shell 7. It becomes a state. As a result, the shutter member 5 rises to the upper shell 6 side, and the engagement state between the rib-like convex portion 57 and the groove-like concave portion 58 is released.
[0106]
At this time, since the engagement holes 50a and 50b of the pair of shutter members 5a and 5b are engaged with the support shafts 49a and 49b, respectively, they are rotated in one direction similarly to the inner rotor 4. On the other hand, since the guide pins 53 on the lower shell 7 side are slidably engaged with the long holes 54 of the pair of shutter members 5a and 5b, the guide pins 53 are rotated as the inner rotor 4 rotates. Moves relatively inside the elongated hole 54 toward the inner peripheral end.
[0107]
Accordingly, the pair of shutter members 5a and 5b is gradually moved from the slightly opened state shown in FIG. 20 to the position where the opening 44 of the inner rotor 4 is opened through the states shown in FIGS. 21, 22 and 23. To do. Then, as shown in FIG. 24, when the inner rotor is rotated until the opening 44 of the inner rotor 4 and the opening 24 of the cartridge main body 2 substantially coincide with each other, the opening 24 of the cartridge main body 2 is completely opened. It becomes a state.
[0108]
Accordingly, in the disk drive device 70, as shown in FIG. 8, an optical pickup that records and / or reproduces an information signal with respect to the optical disk 3 and a turntable 78 that rotationally drives the optical disk 3 inside the disk cartridge 1. 79 approaches are possible.
[0109]
Specifically, in the disk drive device 70, the turntable 78 moves to the disk cartridge 1 side, or the disk cartridge 1 moves to the turntable 78 side, so that the turntable 78 passes through the center hole 3a of the optical disk 3. The chucking magnet 78 a is attracted to the chucking plate 40, and the center portion of the optical disc 3 is sandwiched between the turntable 78 and the chucking plate 40. As a result, the optical disk 3 is chucked on the turntable 78 and is rotationally driven by the driving force of the spindle motor 80. Further, the optical disk 3 is chucked on the turntable 78 to set the height position inside the cartridge body 2.
[0110]
On the other hand, when the optical pickup 79 is moved in the radial direction of the optical disc 3, at least a part of the optical pickup 79 passes from the outside of the outer peripheral portion of the disc cartridge 1 through the openings 24 and 44 to the disc cartridge 1. It is entered inside. The optical pickup 79 faces the signal reading surface R, which is the lower surface of the optical disc 3, at a predetermined interval inside the disc cartridge 1.
[0111]
In the disk drive device 70, when the optical disk 3 mounted on the turntable 78 is driven to rotate by the spindle motor 80, the optical pickup 79 emits laser light while moving in the radial direction of the optical disk 3. Information signals are recorded and / or reproduced.
[0112]
On the other hand, when the disc cartridge 1 is ejected from the disc drive device 70, for example, an eject button (not shown) provided on the front panel 74 is operated. As a result, the loading mechanism performs the ejection operation, the disk cartridge 1 is moved to the cartridge insertion / removal port 75 side, and the rack bar 77 described above is relatively retracted. When the rack bar 77 moves backward, the inner rotor 4 and the pair of shutter members 5a and 5b operate in the opposite direction to that when the disk is inserted, that is, the inner rotor 4 rotates in the other direction, and the pair of shutters. The members 5a and 5b close the opening 24 of the cartridge body 2.
[0113]
Specifically, the pair of shutter members 5a and 5b are positions where the opening 44 of the inner rotor 4 is gradually closed from the fully open state shown in FIG. 24 to the state shown in FIGS. Move up. At this time, the lift-up convex portion 48 on the inner rotor 4 side is not engaged with the lift-up convex portion 14 on the lower shell 7 side, and can be rotated smoothly and with a weak force.
[0114]
Next, as shown in FIG. 17, when the inner rotor 4 rotates until the opening 44 of the inner rotor 4 is inclined most with respect to the opening 24 of the cartridge body 2, the opening 24 of the cartridge body 2 is completely It will be in the state where it was obstructed.
[0115]
At this time, since the lift-up convex portion 48 on the inner rotor 4 rides on the lift-up convex portion 14 on the lower shell 7 side, the subsequent rotational operation of the inner rotor 4 is relatively large due to the frictional force described above. Power is required.
[0116]
As the inner rotor 4 rotates, the guide pin 53 relatively moves inside the elongated hole 54 toward the end on the outer peripheral side. Then, when the guide pin 53 comes into contact with the elastic piece portion 56 and presses the elastic piece portion 56, an elastic force is generated in the elastic piece portion 56. The pair of shutter members 5a and 5b are brought into a state in which the abutting surfaces are pressed against each other by this elastic force, and the sealing performance is improved.
[0117]
Further, in the disk cartridge 1, the first contact surface portion 51 of one shutter member 5a and the second contact surface portion 52 of the other shutter member 5b are engaged, and the first shutter surface 5b of the other shutter member 5b is engaged. The first contact surface portion 51 is engaged with the second contact surface portion 52 of the one shutter member 5a.
[0118]
In this case, since it is appropriately overlapped with the abutting surfaces of the pair of shutter members 5a and 5b, a so-called labyrinth effect is generated to prevent dust and the like from entering between the pair of shutter members 5a and 5b. It has become. In addition, the pair of shutter members 5a and 5b is prevented from being deformed.
[0119]
Next, the rack rod 77 is further retracted, so that the engagement between the gear portion 77a of the rack rod 77 and the gear portion 45 of the inner rotor 4 is released, and then the operation protrusion of the lock member 29 is released from the lock opening 35a. By protruding the portion 32 a, the stopper convex portion 33 a of the stopper piece 33 is engaged with the gear portion 45 of the inner rotor 4. As a result, in the disc cartridge 1, the rotation of the inner rotor 4 is locked and a so-called locked state is established, so that the closed state of the openings 24 and 44 by the shutter member 5 can be reliably held, and the user or the like Thus, it is possible to reliably prevent the shutter member 5 from being accidentally opened.
[0120]
Further, in this disk cartridge 1, the lift-up convex portion 48 on the inner rotor 4 side rides on the lift-up convex portion 14 on the lower shell 7 side. Therefore, the weight of the shutter member 5 and the inner rotor 4. The openings 24 and 44 are maintained in a completely closed state by a frictional force or the like generated between the lower shell 7 and the lower shell 7.
[0121]
Next, in the disk drive device 70, the opening / closing door 76 opens the cartridge insertion / removal opening 75, and the disk cartridge 1 is automatically ejected from the opened cartridge insertion / removal opening 75 by the loading mechanism.
[0122]
【The invention's effect】
As described above in detail, according to the disk cartridge of the present invention, it is possible to reliably prevent dust and the like from entering the inside of the cartridge body, and in particular, at least the disk shape in order from the upper shell. Since the recording medium, the intermediate shell, the shutter member, and the lower shell have a structure suitable for being assembled, the case where the recording medium is assembled by sequentially stacking from the lower shell side where the opening is formed, In comparison, it is possible to suppress entry of dust or the like into the cartridge body. Further, according to this disk cartridge, the tab member stored in the tab storage portion can be slid appropriately and stably.
[Brief description of the drawings]
FIG. 1 is a perspective view of a disk cartridge to which the present invention is applied as viewed from the upper shell side.
FIG. 2 is an exploded perspective view of the disk cartridge as viewed from the upper shell side.
FIG. 3 is a perspective view of the disk cartridge as viewed from the lower shell side.
FIG. 4 is an exploded perspective view of the disk cartridge as viewed from the lower shell side.
FIG. 5 is a plan view of an inner surface side of an upper shell constituting the disk cartridge.
FIG. 6 is a plan view of an inner surface side of a lower shell constituting the disk cartridge.
FIG. 7 is an enlarged cross-sectional view of a main part showing an abutting portion between an upper shell and a lower shell 7 constituting the disk cartridge.
8 is a cross-sectional view taken along line AA ′ in FIG. 1. FIG.
FIG. 9 is a perspective plan view showing an open position of the inner rotor with respect to the cartridge main body in the disk cartridge.
FIG. 10 is a perspective plan view showing the closed position of the inner rotor with respect to the cartridge body in the disk cartridge.
FIG. 11 is a perspective view of a shutter member constituting the disk cartridge as viewed from the upper shell side.
FIG. 12 is a perspective view of a shutter member constituting the disk cartridge as viewed from the lower shell side.
FIG. 13 is a perspective view showing an open position of the shutter member with respect to the inner rotor in the disc cartridge.
FIG. 14 is a perspective view showing a closed position of the shutter member with respect to the inner rotor in the disk cartridge.
FIG. 15 is an essential part cross-sectional view showing an enlarged engagement portion between an inner rotor and a shutter member constituting the disk cartridge.
FIG. 16 is an external perspective view of a disk drive device used for the disk cartridge.
FIG. 17 is a perspective plan view illustrating the opening / closing operation of the disk cartridge, showing a state in which the opening is completely closed.
FIG. 18 is a view for explaining the opening / closing operation of the disk cartridge, and is a cross-sectional view of a main part showing a state where the lift-up convex part on the inner rotor side rides on the lift-up convex part on the upper shell side. .
FIG. 19 is a diagram for explaining the opening / closing operation of the disk cartridge, showing a state in which the engagement state between the lift-up convex portion on the inner rotor side and the lift-up convex portion on the upper shell side is released. It is principal part sectional drawing.
FIG. 20 is a perspective plan view illustrating the opening / closing operation of the disc cartridge, showing a state where the opening is slightly opened.
FIG. 21 is a view for explaining the opening / closing operation of the disc cartridge, and is a perspective plan view showing a state in which the opening is further opened.
FIG. 22 is a perspective plan view illustrating the opening / closing operation of the disk cartridge, showing a state in which the opening is further opened.
FIG. 23 is a perspective plan view illustrating the opening / closing operation of the disk cartridge, showing a state where the opening is further opened.
FIG. 24 is a perspective plan view illustrating the opening / closing operation of the disk cartridge, showing a state in which the opening is completely opened.
FIG. 25 is a perspective view of a main part showing a tab member and an upper shell side tab housing part constituting the disk cartridge.
26 is a view seen from the direction of arrow B in FIG. 25. FIG.
FIG. 27 is a cross-sectional view taken along line CC ′ in FIG.
FIG. 28 is a perspective view of a principal part showing an engaged state between a tab member constituting the disc cartridge and a tab storage portion on the upper shell side.
FIG. 29 is a cross-sectional view of a principal part showing an engaged state between a tab member constituting the disk cartridge and a tab storage portion on the upper shell side.
FIG. 30 is a perspective view showing a configuration example of a conventional disk cartridge.
[Explanation of symbols]
1 Disc cartridge 2 Cartridge body 3 Optical disc 4 Inner rotor 5 Shutter member 6 Upper shell 7 Lower shell 8 Upper shell outer wall 21 Lower shell outer wall 24 Cartridge opening 29 Lock member , 30 tab member, 40 chucking plate, 42 plate presser, 44 inner rotor opening, 81 main body, 82 engaging convex, 83 switching elastic convex, 84 slide operation convex, 85 slide piece, 86 guide Convex part, 87 step part, 88 switching concave part, 89 upper notch part, 90 guide concave part, 91 guide hole

Claims (5)

A disc-shaped recording medium;
An upper shell and a lower shell with which the peripheral walls are abutted with each other, the disk-shaped recording medium is rotatably accommodated therein, and at least a part of the peripheral wall of the lower shell is opened, A cartridge body in which an opening is formed so that a part of the disk-shaped recording medium faces outward over the inner and outer circumferences;
An intermediate shell that is rotatably supported inside the cartridge body and has an opening corresponding to the opening of the cartridge body;
A shutter member that moves between a position that closes the opening of the cartridge body and a position that opens the opening of the cartridge body by rotating the middle shell;
A tab member slidably housed in a tab housing portion formed at one corner of the cartridge body,
The tab member includes at least a main body portion that is held between a peripheral wall on the outer peripheral side of the upper shell that forms the tab storage portion and a peripheral wall on the inner peripheral side of the upper shell, and on the inner peripheral side of the upper shell. A disc cartridge comprising: an engaging convex portion that engages with a step portion in a thickness direction formed on a peripheral wall. When the tab member is positioned at both ends in the sliding direction, the tab member is selectively engaged with a pair of switching recesses formed on the inner peripheral wall of the upper shell, and the inner peripheral side of the upper shell. 2. The disc cartridge according to claim 1, further comprising a switching elastic convex portion that is elastically displaceable in a direction of approaching and separating from the peripheral wall. The tab member faces the outside from a tab opening formed in a side surface portion of the cartridge body, and is slid between a position where the tab opening is opened and a position where the tab opening is closed. 2. The disk cartridge according to claim 1, further comprising an operation convex portion. The tab member closes the tab opening together with the main body portion when the slide operation convex portion closes the tab opening, and the slide operation convex portion opens the tab opening. 2. A disk cartridge according to claim 1, further comprising a slide piece portion engaged with a guide recess formed between an outer peripheral wall and an inner peripheral wall of the upper shell. . The tab member has a guide convex portion slidably engaged with a guide hole formed in the lower shell,
When the guide projection is located at one end of the guide hole, the main body closes a part of one side of the guide hole, and when the guide projection is located at the other end of the guide hole. 2. The disc cartridge according to claim 1, wherein the main body closes a part of the other side of the guide hole.

Images