JP2003157644A - Cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve dust-proof property of a disk cartridge using an inner rotor which opens and closes an opening part of the disk cartridge from an inner side, by a shutter which is driven to open/close by a rotation of the inner rotor. SOLUTION: Three spring action parts 41 are molded integrally at top three places of an external wall 4b of an inner rotor 4. When the inner rotor 4 returns by a rotation to a closing position of the opening part and the opening part of the disk cartridge 1 is closed by a shutter from an inner side, the opening part is sealed completely by the inner rotor 4 which is elastically press-contacted to an inner surface of the disk cartridge 1 through the shutter, with force of three spring action parts 41.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to MO, DVD, D
The present invention belongs to a cartridge most suitable for being applied to a disc cartridge or the like that accommodates or exchangeably accommodates a disc-shaped recording medium such as an optical disc such as a VD-ROM or a magneto-optical disc. The present invention belongs to the technical field of a dust-proof structure for preventing dust (dust) from entering a cartridge in which an opening for inserting a table or the like is opened and closed by a shutter.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
Disk cartridge 101 such as DVD and DV-ROM
A disk D such as an optical disk or a magneto-optical disk is rotatably housed between the upper and lower shells 102 and 103, and an elongated hole-shaped opening 104 for inserting a pickup or a disk table is provided in the lower shell 103 and the upper and lower shells 102. A shutter 105, which is formed along the central portion of 103 and opens and closes these openings 104, is attached to the outside of the lower shell 103 or the upper and lower shells 102, 103, and is attached to the outside of the lower shell 103. The shutter 105 and the disk cartridge 10
The opening 104 is configured to be opened and closed by sliding it along the one side surface 101a in the directions of arrows u and v. Note that S1 indicates a movement (opening / closing) stroke of the shutter 105.

[0003]

However, in the conventional disc cartridge 101 of this type, as shown in FIG. 61, in the shutter closed state in which the shutter 105 closes the opening 104 from the direction of the arrow v, the arrow of the shutter 105 is simply used. The both ends 105a in the u and v directions are merely overlapped with the both sides of the opening 104 of the disc cartridge 101 by OL1. Therefore, in the shutter closed state, the air AR containing dust (dust) DT passes through the opening 104 from the minute gap 106 between the shutter 105, both end portions 105a and both sides of the opening 104 of the disc cartridge 101. And the dust DT was easily attached to the surface of the disc D. It should be noted that if the dust DT adheres to the surface of the disc D, an error during data recording and / or reproduction is likely to occur and error correction cannot be performed. Is a fatal defect.

Thus, for example, as shown in FIG. 62, a pair of inner ribs 107 are formed in parallel inside both end portions 105a in the directions of arrows u and v, which are the sliding direction of the shutter 105, while the disc cartridge 101 is formed. A pair of outer ribs 108 are formed in parallel on the outer sides of both sides of the opening 104, and the gaps 106 on both sides of the opening 104 are bent in a substantially L-shape.
It is conceivable to reduce the invasion of the air AR containing the dust DT into the inside of 01 to some extent. However, shutter 1
05 to the disc cartridge 101 with arrows u and v
The gap 106 between the shirt 105 and both side portions of the opening 104 of the disc cartridge 101 cannot be made zero due to the structure of sliding in the direction, and the dust DT on the order of micron can pass through the gap 106 from the gap 106. It easily invades inside.

Further, as shown in FIG. 63, the shutter 10
5, both end portions 105a and the disk cartridge 101
Of overlap OL2 with both sides of the opening 104 of
Is sufficiently long to increase the flow path resistance of the air AR containing the dust DT that enters through the pair of gaps 106, so that the entry of the air AR can be suppressed. However, according to this method, the movement (opening / closing) stroke S2 of the shutter 105 becomes large, which is not suitable for the small-sized disc cartridge 101, and in addition, like the one shown in FIG. Prevention is difficult.

The present invention has been invented in order to solve the above-mentioned problems, in which air containing dust blocks the inside of the cartridge from the gap between the shutter and the cartridge whose opening is closed by the rotation of the inner rotor. It is an object of the present invention to provide a cartridge capable of effectively preventing the intrusion into the cartridge.

[0007]

To achieve the above object, a cartridge of the present invention is provided with a rotatable inner rotor and a shutter which opens and closes an opening from the inside by the rotation of the inner rotor. In the closed state in which the shutter closes the opening from the inside, a plurality of spring action portions that elastically press the inner rotor against the inner surface of the cartridge via the shutter are provided. According to claim 2 of the present invention, which is dependent on claim 1, the inner rotor is formed of synthetic resin, and the plurality of spring action portions are integrally formed on the top of the outer peripheral wall of the inner rotor. Is. Further, according to claim 3 of the cartridge of the present invention, which depends on claim 2, from an open position in which the inner rotor opens the shutter from the opening to a closed position in which the shutter closes the opening from the inside. When rotated, the plurality of spring action portions ride on a plurality of cam protrusions formed in the cartridge at positions facing the apex of the outer peripheral wall of the inner rotor, so that the plurality of spring action portions The inner rotor is elastically pressed against the inner surface of the cartridge via the shutter by the spring force of the section. Further, according to claim 4 of the cartridge of the present invention, which depends on claim 3, the plurality of spring action portions are integrally formed on a top portion of an outer peripheral wall of the inner rotor, and the plurality of spring acting portions extend from a bottom portion of the inner rotor to a top portion of the outer peripheral wall. A plurality of die-inserting notches reaching the respective lower portions of the plurality of spring action portions are formed.

According to the first aspect of the cartridge of the present invention having the above-mentioned structure, the opening of the shutter is closed from the inner side by the rotation of the inner rotor. Since the cartridge can be elastically pressed against the inner surface of the cartridge, when the shutter closes the opening, there is no gap between the shutter and the cartridge, and air containing dust enters the cartridge through the gap. Can be effectively prevented. According to claim 2 of the cartridge which is dependent on claim 1 of the present invention, since the plurality of spring action parts are integrally molded on the top of the outer peripheral wall of the inner rotor with synthetic resin, the plurality of spring action parts and the inner rotor are formed. And are composed of one part. A cartridge according to claim 2 of the invention is claim 3 in which a plurality of spring action parts are formed in the cartridge when the inner rotor is rotated from the open position of the opening to the closed position. By riding on the cam convex portion of, the spring force of the plurality of spring action portions is effectively generated, and the inner rotor is elastically pressed against the inner surface of the cartridge through the shutter, and the opening portion is opened. The inner rotor can be effectively blocked, and within the rotation range of the inner rotor, the load of the multiple spring action parts on the inner rotor is reduced within the range in which the multiple spring action parts do not ride on the multiple cam protrusions. Therefore, the inner rotor can be rotated easily. Further, in claim 4 of the cartridge subordinate to claim 3 of the present invention, a plurality of die-inserting notches are formed in which the bottom portion of the inner rotor extends through the outer peripheral wall to the lower portions of the plurality of spring action portions. With a simple die structure that does not use a slide core and has a simple split structure, a plurality of spring action portions can be easily integrally formed on the inner rotor.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a disk cartridge to which the present invention is applied will be described below in the following order with reference to the drawings. (1) ... Outline description of disk cartridge using inner rotor (FIGS. 1 to 13) (2) ... Description of first dustproof structure of disk cartridge using inner rotor (FIGS. 6 to 18) (3) ..Explanation of second dustproof structure of disk cartridge using inner rotor (FIGS. 20 to 22) (4) ... Explanation of third dustproof structure of disk cartridge using inner rotor (FIGS. 23 to 26) (5) ) ... Description of fourth dustproof structure of inner rotor disc cartridge (FIGS. 27 to 29) (6) ... Description of fifth dustproof structure of inner rotor disc cartridge (FIGS. 30 to 34) (7) ... Explanation of inner rotor rotating mechanism of disk cartridge using inner rotor (Figs. 35 to 51) (8) ... Slide shutter using disc Description of first dustproof structure of cartridge (FIGS. 52 to 54) (9) ... Description of second dustproof structure of disk cartridge using slide shutter (FIGS. 55 to 57) (10) Description of the third dustproof structure of the used disk cartridge (FIGS. 58 and 59)

(1) ... Outline Description of Inner Rotor-Used Disk Cartridge First, an outline of the inner rotor-used disk cartridge will be described with reference to FIGS. A disk cartridge using an inner rotor (hereinafter, simply referred to as a "disk cartridge"), which is an example of a recording medium storage cartridge having a recording medium storage portion formed therein.
The upper and lower shells 2, 3 of the disc cartridge 1, the inner rotor 4, the pair of shutters 9, 10 and the like of the disc cartridge 1 are molded by a molding member such as synthetic resin. The disk cartridge 1 is formed into a flat, substantially rectangular shape by connecting upper and lower shells 2 and 3 having substantially symmetrical shapes from above and below,
A front surface 1a of the disk cartridge 1 is curved in a gentle arc shape, and symmetrical linear taper portions are formed at both left and right ends of a linearly formed rear surface 1b.
c and 1d are formed substantially parallel to each other, and a taper portion (not shown) having a small angle is formed on the front surface 1a side. A concave groove 34 is horizontally formed along the central portion of the one side surface 1c in the thickness direction, and a window hole 35 and a hole 39 are opened in a bottom surface 34a of the concave groove 34. An elongated hole-shaped opening 5 is formed from the substantially central portion of the lower shell 3 to the central portion of the front surface 1a, and the circular hole portion formed in the substantially central portion of the lower shell 3 of the opening 5 is The disc table insertion hole 5a is formed, and the long hole portion on the front side thereof is formed as a pickup insertion hole 5b. Therefore, the opening 5 is formed as an opening for inserting an insertion member such as a disc table or a pickup.

The inner rotor 4 is formed in a circular dish shape, and a circular vertical outer peripheral wall 4c is integrally formed on the outer periphery of the bottom portion 4b, and the lower shell 3 extends from the central portion to the outer periphery of the bottom portion 4b. 4d of similar shape to the opening 5 of
Are formed. The inner rotor 4 is horizontally installed in a circular inner rotor accommodating portion 8 formed between the upper and lower shells 2 and 3, and is rotatably mounted on the bottom portion 4b of the inner rotor 4. A state in which a disc D such as a DVD, which is a disc-shaped recording medium, is horizontal in a disc storage portion 6 which is a recording medium storage portion formed inside the outer peripheral wall 4c, and is rotatable and capable of a certain amount of vertical movement. It is stored in.

At the center of the lower surface of the upper shell 2, a disk-shaped disk clamper 11 made of a ferromagnetic material is attached by a clamper support ring 12 fixed to the lower surface of the upper shell 2 by welding or the like. The disc clamper 11 is rotatable with respect to the upper shell 2 and is supported so as to be vertically movable within a certain range. And, in the central portion of the upper surface of the upper shell 2, almost U
A bulging portion 2a having a shape is formed. A semicircular locking recess 13 is formed on the other side surface 1d of the disk cartridge 1 at a position closer to the front surface 1a.

A shutter accommodating space is a space in which a pair of thin plate-shaped shutters 9 and 10 formed in a substantially semicircular shape are horizontally formed between the bottom portion 4b of the inner rotor 4 and the lower shell 3. It is stored at the same height in 7. A shutter opening / closing mechanism 16 that opens and closes the pair of shutters 9 and 10 by the rotation of the inner rotor 4 is incorporated between the bottom portion 4b of the inner rotor 4 and the lower shell 3. The shutter opening / closing mechanism 16 is provided on the lower surface of the bottom portion 4b of the inner rotor 4 by
A pair of shutters 9 and 1 are integrally formed at 0 ° opposite positions.
0 rotatably supporting the ends of the shutters 0 on opposite sides, and a pair of rotation fulcrum pins 17 and 18 which are also rotated integrally with the inner rotor 4 and ends of the shutters 9 and 10 on opposite sides. Pair of substantially parallel cam grooves 19 and 2 formed in the
0, and a pair of cam pins 21 and 22 which are fixed pins integrally formed at a 180 ° opposite position on the bottom portion 4b of the lower shell 3.
And a so-called cam mechanism.

The opening / closing operation of the shutter opening / closing mechanism 16 which is opened / closed by the rotation of the inner rotor 4 will now be described. The shutter opening / closing mechanism 16 is, as shown in FIG. 4, FIG. 7, FIG. 9 and FIG. When the rotor 4 is returned to the shutter opening / closing start position (= opening closing position) P1 described later in the direction of arrow b, the opening 4d of the bottom 4b of the inner rotor 4 is inserted into the disk table of the opening 5 of the lower shell 3. Rotated around the hole 5a in the direction of arrow b,
The outer peripheral end of the pickup insertion hole 5b of the opening 5 is closed from the inner side by an outer peripheral portion 4b 'of the bottom 4b of the inner rotor 4. Then, the shutter opening / closing mechanism 16 closes the pair of shutters 9 and 10 in a substantially parallel movement from the direction of the arrow m, and the plane shape is Z-shaped along the edges of the pair of shutters 9 and 10 and is vertically symmetrical. At the position where the formed pair of overlapping slopes 9a, 10a cross diagonally near the center of the disc table insertion hole 5a of the opening 5, the openings 5 of the lower shell 3 overlap vertically from the direction of the arrow m. The opening region of the opening 4d of the inner rotor 4 which overlaps the inner peripheral portions of the disc table insertion hole 5a and the pickup insertion hole 5b is closed from the inside by the pair of shutters 9 and 10. That is, in this closed state of the opening, the inner rotor 4 is
The outer peripheral portion 4b 'of the bottom portion 4b of the bottom and the pair of shutters 9 and 10 on the inner peripheral side of the outer peripheral portion 4b' allow the opening 5 of the lower shell 3 to be formed.
Is completely blocked. The pair of overlapping slopes 9a and 10a are vertically inverted about the orthogonal faces 9b and 10b that are formed in the central portion of the lengthwise direction and are orthogonal to the direction of the arrow m. When the shutter opening / closing mechanism 16 overlaps the overlapping slopes 9a, 10a from the direction of the arrow m, the orthogonal surfaces 9b, 10b are formed by the shutter opening / closing mechanism 16 with respect to the direction of the arrow m of the pair of shutters 9, 10. The moving components in the directions of the orthogonal arrows m ′ are in close contact with each other to completely close the opening 5.

On the other hand, the shutter opening / closing mechanism 16 includes the inner rotor 4 as shown in FIGS.
Is the shutter opening / closing end position (= opening position)
When rotated to P2 in the direction of arrow a, the so-called cam action by the pair of cam grooves 19 and 20 and the cam pins 21 and 22 synchronized with the rotation of the pair of rotation fulcrum pins 17 and 18 in the direction of arrow a. Thus, the pair of shutters 9 and 10 are separated and rotated by substantially parallel movement in the direction of arrow n, which is a direction away from each other, and the pair of shutters 9 and 10 are opened in parallel to both sides of the opening 5. At this time, the opening 4d of the inner rotor 4 completely overlaps the opening 5, and the entire area of the opening 5 is completely opened.

(2) Description of first dustproof structure of disc cartridge using inner rotor Next, referring to FIGS. 6 to 19, the disc cartridge 1 will be described.
The first dustproof structure will be described. When the inner rotor 4 is rotated and returned in the direction of arrow b from the opening opening position P2 shown in FIG. 12 to the opening closing position P1 shown in FIG. At the three locations shown in the figure, the circular outer peripheral wall 4c of the inner rotor 4 is formed by the spring force of the three spring action portions 41.
A downward pressing force is generated at a position, and the bottom portion 4b of the inner rotor 4 is elastically elasticated from above on the bottom portion 3a of the lower shell 3 through the pair of shutters 9 and 10 and on the peripheral portion of the opening portion 5. The close contact makes it possible to prevent dust from entering the disc cartridge 1 through the opening 5.

Now, the details of the first dustproof structure will be described. Here, as shown in FIGS. 14 to 17, the circular and vertical outer periphery of the inner rotor 4 molded by a molding member such as synthetic resin is used. A plurality of three spring action portions 41 are integrally formed in a horizontal shape on top portions of the wall 4c at a plurality of locations. At this time, each of the three spring action portions 41 has a double-end support beam structure in which both end portions 41a are integrally connected to the outer peripheral wall 4c, and the central portions of the upper surfaces of the three spring action portions 41 are substantially in contact with each other. The semi-circular small protrusion 41b is integrally formed.

The three spring action parts 41 are
As shown in FIGS. 14 to 17, the inner rotor 4 is horizontally integrally formed on the upper portions of the three mold insertion notches 42 cut from the bottom portion 4b of the inner rotor 4 to the outer peripheral wall 4c. In this way, three molds which are usually called undercut notches that are cut from the bottom portion 4b of the inner rotor 4 and reach the respective lower portions of the three horizontal spring action portions 41 on the top portion of the outer peripheral wall 4c. According to the structure in which the insertion notch 42 is formed, it is not necessary to use a slide core (core) having a complicated structure when the inner rotor 4 is injection-molded with a mold member such as a synthetic resin by a mold. . In other words, a convex part to be inserted from below into the three mold insertion notches 42 is formed in the lower mold, which is one of the simplest vertical mold halves of the structure. By doing so, the three spring action portions 41 can be easily integrally formed with the inner rotor 4. Since the mold of the two-split type can significantly reduce the manufacturing cost as compared with the mold using the slide core, the manufacturing cost of the inner rotor 4 can be significantly reduced.

14 and 15, a shutter opening / closing start projection 25, which will be described later, is integrally formed on the outer periphery of the outer peripheral wall 4c of the inner rotor 4, and has one spring acting portion 41.
It is shown that the outside of the die is cut across the outside of the die insertion notch 42 in the circumferential direction. However, such a complicated structure also has the above-described vertical half-split type die. Thus, the shutter opening / closing start convex portion 25 can be injection-molded at the same time as the die insertion notch 42.

An example of the circumferential arrangement of the three spring action portions 41 integrally formed on the top of the outer peripheral wall 4c of the inner rotor 4 is, for example, as shown in FIG.
When the inner rotor 4 is rotated back to the opening closing position P1 in the direction of the arrow b, the two spring action portions 41 are arranged substantially symmetrically with respect to the front side of the pickup insertion hole 5b of the opening portion 5, and one spring action portion 41 is provided. It is preferable that the opening 5 of the spring action portion 41 is arranged at the central position on the rear side of the disc table insertion hole 5a.

The top of the circular inner rotor accommodating portion 8 formed between the upper and lower shells 2 and 3 is formed in a circular groove 8a formed on the inner surface (lower surface) of the upper shell 2 and has a circular shape. At three locations on the bottom 8b of the groove 8a facing downward, cam protrusions 43 that are convex downward are integrally formed. The three cam protrusions 43 are
As shown in FIG. 11, the inner rotor 4 is arranged right above the three spring action portions 41 when the inner rotor 4 is returned to the opening closed position P1 in the direction of the arrow b, and these three cam convex portions are arranged. An inclined surface 43a is formed on at least the side surface of the arrow 43 on the arrow a direction side.

Further, as shown in FIG. 13, on the inner surface (upper surface) of the bottom portion 3a of the lower shell 3, a peripheral portion of the opening portion 5 is formed in a substantially U shape and has a low height and is provided around the opening portion peripheral rib 5c. 7 is integrally molded, and as shown in FIGS. 7 and 11, the pair of shutters 9 and 10 are closed on the lower surfaces 9c and 10c of the pair of shutters 9 and 10 from the direction of the arrow m, and their overlaps are formed. The inclined surfaces 9a, 10a are assembled in a substantially U-shape by being overlapped with each other in the direction of the arrow m, and are fitted on the opening peripheral ribs 5c of the bottom portion 3a of the lower shell 3 with a shallow groove portion 9d, 10d is formed. A step portion 5c 'is formed on the outer peripheral portion of the pickup insertion hole 5b on the side opposite to the disc table insertion hole 5a of the rib 5c around the opening portion, the step portion 5c' protruding upward by an amount corresponding to the thickness of the shutters 9,10. This step 5c '
The outer peripheral portion 4b 'of the bottom portion 4b of the inner rotor 4 is configured to come into contact with the upper portion.

The first dustproof structure is constructed as described above, and as shown in FIGS. 8, 10 and 12, the inner rotor 4 is rotated in the direction of arrow a to the opening opening position P2. In the state where the pair of shutters 9 and 10 are opened in the direction of arrow n and the opening 5 of the lower shell 3 is opened,
7, three spring action parts 41 integrally formed on the top part of the outer peripheral wall 4c of the inner rotor 4 are shown by a chain line.
Are separated from the three cam protrusions 43 by a certain distance in the direction of arrow a, and these spring action parts 41 are elastically returned to the horizontal position in the direction of arrow r, which is the upper direction, by their own spring force. Then, these spring acting portions 41
The small projection 41b at the upper center is set at a position where it comes into contact with the bottom portion 8b of the circular groove 8a of the upper shell 2 from below, or at a position slightly lower than the bottom portion 8b.

Then, as shown in FIGS. 7, 9 and 11, the inner rotor 4 is moved to the opening closing position P1 by the arrow b.
When rotated back in the direction, the pair of shutters 9 and 10 close from the direction of the arrow m, and the pair of overlapping slopes 9
a and 10a overlap each other from the direction of the arrow m, and are almost U
When the pair of groove-shaped portions 9c, 10c formed in a letter shape are fitted on the rib 5c around the opening of the lower shell 3 to close the opening 5 of the lower shell 3 from the inside, a solid line in FIG. As shown in, three small cams 41b of the three spring action portions 43 integrally formed on the top of the outer peripheral wall 4c of the inner rotor 4 are integrally formed on the bottom 8b of the circular groove 8a of the upper shell 2. It slides under the convex portion 43 through the slope 43a.

Then, these three spring action parts 41 are
By the spring force in the arrow s direction of these three spring action portions 41 at that time, the cam convex portions 43 slacken in the arrow s direction which is downward by an amount corresponding to approximately the height H1 in the arrow s direction.
6 and 17, the inner rotor 4 is elastically pressed from the direction of the arrow s onto the bottom portion 3a of the lower shell 3 via the pair of shutters 9 and 10, and the outer peripheral portion of the bottom portion 4b of the inner rotor 4 is shown. 4b 'and the groove portions 9d and 10d of the pair of shutters 9 and 10 are ribs 5 around the opening of the lower shell 3.
It is elastically adhered onto c and 5c 'from the direction of arrow s. Then, the opening 5 of the lower shell 3 is completely sealed. As a result, it is possible to prevent the air AR containing the dust DT from entering the disc cartridge 1 through the opening 5 and adhering the dust DT to the surface of the disc D housed therein. it can.

18A and 18B show modified examples of the three spring action portions 41, and the spring action portion 41 shown in FIG. In the outer peripheral wall 4c, a horizontal elongated hole 44 is formed in the lower portion of the spring acting portion 41, and the spring acting portion 41 shown in FIG. 18B integrally connects only one end 41a to the outer peripheral wall 4c. The structure is a cantilever structure. In addition, as another modification of the three spring action portions 41,
At the bottom of the circular groove 8a of the upper shell 2, three spring action parts 41 are provided.
Can be integrally formed in a downward shape, and three cam protrusions 43 can be integrally formed on the top of the outer peripheral wall 4c of the inner rotor 4 in an upside down arrangement. It is also possible to form the portion 41 and the cam convex portion 43 by another member such as a leaf spring.

By the way, FIG. 19 illustrates the problem of the disk cartridge using the inner rotor 4 which does not have the above-mentioned three spring action portions 41. That is, in this case, only the semicircular small protrusion 41b is integrally formed on the top of the outer peripheral wall 4c of the inner rotor 4, and is formed in a downward convex shape on the downward bottom of the circular groove 8a of the upper shell 2. When the inner rotor 4 is rotationally returned from the opening opening position P2 to the opening closing position P1, the small projection 41b passes under the cam projection 43 and passes through the slope 43a. By sliding, the cam protrusion 43 presses the inner rotor 4 onto the bottom portion 3a of the lower shell 3 through the pair of shutters 9 and 10 in the direction of arrow s.

However, in this case, due to dimensional tolerances and the like, the small projection 41b of the inner rotor 4 and the cam projection 43 are formed.
If even a slight gap G1 is generated between the cam convex portion 43 and the inner rotor 4 on the bottom portion 3a of the lower shell 3 from the direction of the arrow s at the opening closing position P1, the cam convex portion 43 cannot be pressed. The sealing performance of the opening 5 of the lower shell 3 is impaired. Therefore, dust easily enters the disc cartridge through the opening 5 and adheres to the surface of the disc, and the dustproof property is extremely low.

Further, within the rotation range in the directions of arrows a and b between the opening opening position P2 and the opening closing position P1 of the inner rotor 4, the small protrusion 41a of the inner rotor 4 and the circular groove of the upper shell 2 are formed. Since a large gap G2 corresponding to the height of the cam convex portion 43 must be formed between the bottom portion 8b of the inner rotor 8a and the bottom portion 8b of the inner portion 8a, the opening opening position P2 and the opening closing position P1 of the inner rotor 4 are to be formed. Within the rotation range between them, there is a problem that the inner rotor 4 is apt to rattle in the vertical direction, and the opening and closing operations of the pair of shutters 9 and 10 cannot be performed smoothly. However, according to the first dustproof structure of the disk cartridge 1 of the present invention described above, there is an advantage that all such problems can be overcome.

(3) Description of Second Dustproof Structure of Disk Cartridge Using Inner Rotor Next, FIG.
The second dustproof structure of the disc cartridge 1 will be described with reference to FIGS. In the second dustproof structure, as described above, the inner rotor 4 moves from the opening opening position P2 shown in FIG.
Is returned to the opening closing position P1 shown in FIG. 2 in the direction of the arrow b, and the outer peripheral portion 4 of the bottom portion 4b of the inner rotor 4 is rotated.
When b ′ and the pair of shutters 9 and 10 close the opening 5 of the lower shell 3 from the inside, substantially U of the opening 5 is closed.
By completely sealing the character-shaped peripheral portion 5d with the elastic member 45 such as rubber or soft synthetic resin, the air AR containing the dust DT is more surely intruded into the disc cartridge 1 through the opening 5. This is something that can be prevented.

Therefore, an elastic member 45 is bonded along the upper surface of the substantially U-shaped peripheral portion 5d of the opening 5 of the lower shell 3,
It is attached in a substantially U-shape by a fixing method such as fitting and fusion. At this time, a step portion 5d 'which is projected upward by an amount corresponding to the thickness of the shutters 9 and 10 is provided on the outer peripheral portion of the pickup insertion hole 5b on the side opposite to the disc table insertion hole 5a of the peripheral portion 5d of the opening 5. Is formed,
The outer peripheral portion 45 'of the elastic member 45 is bent into a substantially Z shape and is attached up to the step 5d'.

Therefore, according to the second dustproof structure, the inner rotor 4 is returned from the opening opening position P2 to the opening closing position P1 in the direction of arrow b, and the outer peripheral portion 4b of the bottom portion 4b of the inner rotor 4 is rotated. 'And a pair of shutters 9,
When the entire area of the opening portion 5 of the lower shell 2 is closed by 10, the outer peripheral portion 4 of the bottom portion 4b of the inner rotor 4 is closed.
b ′ and the pair of shutters 9 and 10 are the peripheral portion 5 of the opening 5.
The elastic members 45, 45 ′ having a substantially U-shape of d are closely attached against the elasticity of the elastic members 45. As a result, the opening 5
It is possible to obtain a high dust-proof property in which the entire area of is completely sealed by the elastic member 45.

The second dustproof structure uses the plurality of action portions 41 and the cam convex portions 43 of the first dustproof structure described above together, so that the inner rotor 4 of the inner rotor 4 is closed at the opening closing position P1. The outer peripheral portion 4b 'of the bottom portion 4b and the pair of shutters 9 and 10 are mounted on the elastic members 45 and 45' so that they are mutually elastic by the combined force of the elastic force of the elastic members 45 themselves and the spring force of the plurality of spring action portions 41. Can be pressure bonded,
The dustproof property is further improved.

(4) Description of Third Dustproof Structure of Disk Cartridge Using Inner Rotor Next, the third dustproof structure of the disk cartridge will be described with reference to FIGS. 24 to 26, the phases of the pair of shutters 9 and 10 are vertically inverted. In the third dustproof structure, as described above, the inner rotor 4 is rotated and returned in the direction of the arrow b from the opening opening position P2 shown in FIG. 12 to the opening closing position P1 shown in FIG. A pair of shutters 9 and 10 are substantially Z-shaped in a plan view, and overlapping sloping surfaces 9a and 10a that are vertically symmetrical are closed from the direction of the arrow m and overlap with each other, that is, a portion K in FIG. By completely sealing the gap portion 46 at the open position with the pair of elastic members 47 such as rubber or soft synthetic resin, the slopes 9a and 10a for overlapping the shutters 9 and 10 are formed.
The air AR containing the dust DT can be prevented from entering the disc cartridge 1 through the gap 46 between the gaps.

At this time, in FIGS. 23 and 24, the pair of elastic members 47, which are formed in a substantially strip shape, are used as the pair of shutters 9 and 1.
0 at the symmetrical position of the overlapping slopes 9a and 10a,
Adhesion and fitting along the direction orthogonal to the arrow m direction,
It is attached in parallel by a fixing method such as fusion. The vertically symmetrical surfaces of the pair of elastic members 47 are formed into arcuate surfaces 47a along the arrow m direction.

Therefore, according to this third dustproof structure, the slopes 9a, 1 for overlapping the pair of shutters 9, 10 are provided.
When 0a closes from the direction of arrow m and overlaps vertically,
The pair of overlapping slopes 9a and 10a are pressure-bonded to the arc-shaped surfaces 47a of the pair of elastic members 47 from the upper and lower sides shown in the arrow t direction against each other elastically, and the pair of overlapping slopes 9a and 10a are formed. The gap portion 46 between the 10a can be completely closed by the pair of elastic members 47. It should be noted that orthogonal surfaces 9b and 10b, which are formed in the central portion of the pair of overlapping slopes 9a and 10a and are orthogonal to the direction of the arrow m, are pressure-bonded to each other from the direction of the arrow m'which is orthogonal to the direction of the arrow m. Then, the opening 5 is completely closed.

In FIG. 25, a pair of elastic members 47 are formed into a tubular elastic member having a hollow portion 47b formed along the center and having a deformable shape. In addition, FIG. 26 shows a pair of elastic members (tube-shaped elastic members) 47 along the step portions 9e and 10e orthogonal to the arrow m direction of the pair of overlapping slopes 9a and 10a shown in FIG. When attached by a fixing method such as adhesion, fitting, and fusion, and when the pair of overlapping slopes 9a and 10a are closed in the direction of the arrow m, these tip faces 9f and 10f are formed.
Is pressure-bonded to the pair of elastic members 47 to close the gap 46 between the slopes 9a and 10a for overlapping.

(5) Description of Fourth Dust-Proof Structure of Inner Rotor-Used Disk Cartridge Next, a fourth dust-proof structure of the disk cartridge will be described with reference to FIGS. 27 to 29. 27 to 29, the phases of the pair of shutters 9 and 10 are vertically inverted. In the fourth dustproof structure, as described above, the inner rotor 4 is rotated and returned in the arrow b direction from the opening opening position P2 shown in FIG. 12 to the opening closing position P1 shown in FIG. A pair of shutters 9, 10
Is substantially Z-shaped, and the overlapping slopes 9a, 10a that are vertically symmetrical are closed from the direction of the arrow m and overlap vertically, that is, the gap portion of the portion indicated by K in FIG. Labyrinth-shaped portion 48 having one or a plurality of dust accumulation concave portions 48a which are dust accumulation portions
By doing so, it is possible to prevent the dust DT from entering the disc cartridge 1 together with the air AR from the gap portion 46 between the pair of shutter slopes 9a and 10a. It is a thing.

At this time, as shown in FIGS. 27 and 28,
The labyrinth-shaped portion 48 is disposed below the gap portion 46, and has one or a plurality of upward dust accumulation concave portions 48 a that are open upward and the gap portion 4 thereof.
6 is arranged on the upper side of 6, and is combined with one or a plurality of downward convex portions 48b inserted from above into these upward dust accumulation concave portions 48a to form a narrow gap bent in a substantially zigzag shape. Has been formed. However, the arrow m on the pair of overlapping slopes 9a, 10a
At the end portion which is the tip portion in the direction and which is the inflow side of the air AR to the labyrinth-shaped portion 48, an upward convex portion 48c is formed below the gap portion 46, and the gap portion 4 is formed.
A downward concave portion 48d formed on the upper side of 6 is inserted into the upward convex portion 48c from the upper side. And FIG.
As shown in FIG. 8, the plurality of dust accumulating concave portions 48a and convex portions 48b, and the semicircular convex portions 48c and concave portions 48d are in the longitudinal direction of the pair of overlapping slopes 9a and 10a, and FIG. It is formed in a convex shape or a concave shape that extends substantially in parallel along the arrow m'direction shown in FIG.

The dust accumulation recess 48a has a substantially semicircular cross section, and the protrusion 48b inserted from above has a substantially tapered shear cross section and has a lower end (tip) at its lower end (tip). A roundness (R shape) is formed. Further, the projecting portions 48c and the recessed portions 48d at the tips are formed in a substantially semicircular cross section. Then, the dust accumulating concave portion 48a and the convex portion 4 inserted from above into the concave portion 48a.
When forming 8b in a plurality of rows along the inclination direction (arrow m direction) of the pair of overlapping slopes 9a and 10a, the pair of overlapping slopes 9a of the dust accumulating concave portions 48a and the convex portions 48b. The height (= depth) H11 on the upstream side in the tilt direction of 10a is high, and the height (= depth) H12 on the downstream side in the tilt direction is low.

In the labyrinth-shaped portion 48, for example, the gap portion 46 is formed in a narrow gap along the inflow direction of the air AR between the substantially semicircular convex portion 48c and the concave portion 48d at the first stage. 46a, a wide gap 46b is formed on the upstream side between the next substantially tapered convex portion 48b which is the second stage and the substantially semicircular concave portion 48a, and the third convex portion 48 is formed.
A narrow gap 4 is formed between the tip of b and the center of the recess 48a.
6c, the convex portion 48b and the concave portion 48 of the fourth stage
A wide gap 46d is formed on the downstream side with respect to a, and a narrow gap 46e is formed in the intermediate portion between the two sets of the convex portion 48b and the concave portion 48a which is the fifth step, and the next substantially tapered convex portion which is the sixth step. A wide gap 46f is formed on the upstream side between the portion 48b and the substantially semicircular concave portion 48a, and a narrow gap 46g is formed between the tip of the convex portion 48b and the central portion of the concave portion 48a, which is the seventh gap. A wide gap 46h is formed on the downstream side between the convex portion 48b which is a step and the concave portion 48a. Therefore, this gap portion 46 is a narrow gap 4 along the inflow direction of the air AR.
6a, wide gap 46b, narrow gap 46c, wide gap 46
d, narrow gap 46e, wide gap 46f, narrow gap 46
g and a wide gap 46h are arranged alternately in a zigzag shape.

Therefore, according to the fourth dustproof structure, as shown in FIG. 27, the overlapping slopes 9a and 10a of the pair of shutters 9 and 10 are overlapped with each other in the direction of the arrow m, as described above. The opening 5 of the lower shell 3
When one is closed, one or a plurality of downward convex projections 48b arranged on the upper side are inserted from above into one or a plurality of upward dust accumulation concave sections 48a arranged on the lower side, and By inserting the substantially semicircular downward concave portion 48d into the approximately semicircular upward convex portion 48c from above, the labyrinth shaped portion 48 which is a narrow gap bent in a zigzag shape is formed.

At this time, the upward convex portion 48c at the tip has a substantially semicircular cross-sectional shape, and the plurality of downward downward convex portions 48b at the upper side have substantially tapered cross-sectional shapes. Since the lower end (tip) is rounded (R-shaped), the pair of overlapping slopes 9a, 10a
Are engaged with each other in the direction of arrow m, the pair of slopes 9a and 10a for overlapping of the shutters 9 and 10 are overlapped.
While the portion bends in the directions of arrows t and t ′, which are vertical directions, against elasticity, the upward convex portion 48c of the tip smoothly overtakes the downward plural convex portions 48b on the upper side in the direction of arrow m, and then downwards. It can be smoothly engaged with the recess 48d.

Then, the air AR containing the dust DT enters the gap portion 46 of the labyrinth-shaped portion 48 through the narrow gap 46a at the tip, and the wide gap 46b and the narrow gap 46.
c, wide gap 46d, narrow gap 46e, wide gap 46
f, the narrow gap 46g, and the wide gap 46h are sequentially passed, and the inflow is made while being bent in a zigzag shape. Then, the air AR has a narrow gap 46a, 46c, 46
e, 46g to wide gaps 46b, 46d, 46f, 4
When the air AR is sequentially discharged for 6 h, the air AR is rapidly expanded in sequence, and the flow rate of the air AR is gradually weakened.

Then, the air AR containing the dust DT is filled with the narrow gaps 46 in the gap portion 46 of the labyrinth-shaped portion 48.
Wide gaps 46b, 4 from a, 46c, 46e, 46g
6d, 46f, and 46h are sequentially discharged, and the air AR
The dust DT is sequentially separated from the air AR at the moment when the flow rate of the dust is gradually weakened, and is sequentially accumulated in the plurality of dust accumulating recesses 48a formed along the lower side of the gap portion 46. It will be. Therefore, it is possible to prevent the dust DT from entering the disc cartridge 1 together with the air AR as much as possible.

In particular, it is not always necessary to form the upward dust accumulating concave portions 48a and the downward convex portions 48bb continuously in the direction of the arrow m '.
As shown in FIG. 9 (A), they may be formed discontinuously in the direction of the arrow m ′, and in this case, it is preferable to form (dispose) in a zigzag pattern in the direction of the arrow m. Further, for the plurality of downward convex portions 48b and the like, various shapes as shown in FIG. 29B can be selected.

(6) Description of Fifth Dust-Proof Structure of Inner Rotor-Used Disk Cartridge Next, a fifth dust-proof structure of the disk cartridge will be described with reference to FIGS. In the fifth dustproof structure, as described above, the inner rotor 4 is rotated and returned in the direction of the arrow b from the opening opening position P2 shown in FIG. 12 to the opening closing position P1 shown in FIG. When the outer peripheral portion 4b ′ of the bottom portion 4b of the inner rotor 4 and the pair of shutters 9 and 10 close the opening 5 of the lower shell 3, the outer peripheral portion of the shutter 9 is indicated by the portion L in FIG. In the above, a plurality of turbulent flow generation concavities and convexities are formed in a gap portion 50 where a portion of the outer peripheral portion 4b ′ of the bottom portion 4b of the inner rotor 4 adjacent to the opening 4d overlaps the bottom portion 3a adjacent to the opening 5 of the lower shell 3 from above. By forming the turbulent flow generation structure portion 51 having the portion 51a, the dust DT and the air AR from the opening portion 5 through the gap portion 50.
It is possible to prevent the intrusion into the disc cartridge 1 from the opening 4d of the inner rotor 4 through the above.

At this time, as shown in FIGS. 30 and 31,
The turbulent flow generation irregularities 51a and 51b in the direction orthogonal to the arrow t direction, which is the direction in which the air AR containing the dust DT passes through the gap portion 50, are provided, for example, in the bottom portion 4 of the inner rotor 4.
It may be formed on the lower surface of b, or the turbulent flow generation uneven portion 5 may be formed.
1a may be formed on the upper surface of the bottom portion 3a of the lower shell 3.
In addition, the uneven portion 51a for generating the turbulent flow is attached to the inner rotor 4
It may be formed on both the lower surface of the bottom portion 4b and the upper surface of the bottom portion 3a of the lower shell 3.

Therefore, according to the fifth dustproof structure, as shown in FIG. 31, the air AR containing the dust DT penetrates into the gap portion 50 through the opening 5 of the lower shell 3 to cause this gap. When the air AR passes through the portion 50 in the direction of the arrow t and enters the disc cartridge 1 through the opening 4d of the inner rotor 4, the air AR thereof has a plurality of irregular portions 51a for generating turbulent flow in the gap portion 50. Buffer with this air AR
A turbulent flow is generated. Then, due to the turbulent flow action of the air AR, the dust DT also fluctuates in the gap portion 50, and the dust DT is dented in the turbulent flow generation uneven portion 51 a while the dust DT is flying in the gap portion 50. Air AR gradually hooked to the edge etc.
Will be separated from. Therefore, the dust DT cannot completely escape through the gap portion 50, and accumulates in the gap portion 50 midway. As a result, it is possible to prevent the dust DT from entering the disc cartridge 1 together with the air AR as much as possible.

A plurality of uneven portions 51a, 5a for generating turbulent flow are provided.
1b does not need to have an uneven ridge shape having a rectangular cross section as shown in FIGS. 30 and 31, and for example, the circular shapes shown in FIG. 32 are arranged in a zigzag shape, or as shown in FIG. In addition, elongated holes and round holes may be arranged in a zigzag shape, or may be a combination of polygonal shapes, triangular shapes, round shapes, and other irregular shapes as shown in FIG.

(7) Description of Inner Rotor Rotation Mechanism of Disk Cartridge Using Inner Rotor Next, the inner rotor rotation mechanism of the disk cartridge will be described with reference to FIGS. First, FIG. 35 shows that the inner rotor 4 is at the opening / closing start position (=
The state is shown in the initial state in which the lock member 36 is returned to the opening portion closing position) P1 in the direction of the arrow b.

At this time, a projection 25 for opening and closing the shutter, which is an arcuate projection integrally formed in an arcuate shape on the outer peripheral surface 4a of the inner rotor 4, is formed on one side surface 1c of the disk cartridge 1. An arcuate window 35 is projected through a rectangular window hole 35 opened at a substantially central position of the bottom portion 34a of the groove 34, and the shutter opening / closing start convex portion 25 causes the window hole 35 to be opened. It is blocked. Then, the inner rotor 4 formed at a substantially central position in the circumferential direction of the projection 25 for opening and closing the shirt.
2 for opening and closing the opening and closing of the shirt, which is the portion to be rotated.
6 is positioned at a substantially central position of the window hole 35 in the longitudinal direction.

The outer peripheral surface 4a of the inner rotor 4
Then, a partial gear 27, which is an outer peripheral gear integrally formed in an arc shape on the arrow b direction side from the shutter opening / closing start convex portion 25.
Is drawn from the window hole 35 to the position in the direction of the arrow b in the disc cartridge 1 so as to be hidden. In addition, the lock member 36 locks the concavity 28 for closing the opening and closing of the shutter, which is formed on the outer peripheral surface 4a of the inner rotor 4 at a position deviated from the partial gear 27 in the arrow b direction by a certain distance. ing. The lock member 36 is made of a synthetic resin or the like and has a substantially Y shape.
It is attached around a fulcrum pin 38 integrally formed at a position near the outer periphery of the inner rotor 4 in the lower shell 3 so as to be rotatable in the directions of arrows c and d. Then, the tip 36b of the lock release arm 36a of the lock member 36 has the concave groove 3
The bottom portion 34a of No. 4 is projected from the direction of the arrow d into the concave groove 34 through a hole 39 formed at a position displaced from the window hole 35 to the front surface 1a side. The lock arm 36c, which is formed on the side opposite to the lock release arm 36a of the lock member 36 and is formed in a substantially bifurcated shape, is provided in the recess 28 for ending the opening / closing of the shirt rotor of the inner rotor 4 by the weak spring force of the mold spring 36d. To lock the inner rotor 4.

Therefore, in this initial state, as shown in FIG. 48, the opening 5 of the lower shell 3 of the disk cartridge 1 is closed from the inside by the pair of shutters 9 and 10, and the shutters 9 and 10 are opened and closed. Since the partial gear 27 on the outer circumference of the inner rotor 4 to be driven is hidden inside the disc cartridge 1, even if the inner rotor 4 is unlocked by pushing the lock release arm 36a of the lock member 36 with a finger in the direction of arrow c. , Its partial gear 27
It is impossible to open the shutters 9 and 10 by rotating the inner rotor 4 with a finger from outside the disc cartridge 1 to operate the inner rotor 4.

Next, in FIGS. 36 to 43, a rack member 71, which is an inner rotor rotation driving means provided in a disk drive device described later, is arranged along one side surface 1c of the disk cartridge 1 in the direction of arrow e. It shows how the slide drive is relatively performed. And FIG.
As shown in FIG. 6, when the rack member 71 is slid to the predetermined position with respect to the disk cartridge 1 in the direction of arrow e, the rack member 71 is used to start opening / closing of the shirt on the side of the tip 71a, which is the inner rotor rotation drive starting portion. The protrusion 72 pushes the tip 36b of the unlocking arm 36a of the lock member 36 in the direction of arrow c. Then, this lock member 3
The lock arm 36c of No. 6 is rotated in the direction of the arrow c against the mold spring 36d to be disengaged from the recess 28 for ending the opening / closing of the shutter of the inner rotor 4, and the inner rotor 4 is unlocked.

Next, when the rack member 71 is continuously driven to slide in the direction of arrow e, the projection 7 for opening and closing the shirt is opened.
2 is the tip 3 of the lock release arm 36a of the lock member 36
6b, the tip end 36b of the lock release arm 36a of the lock member 36 is projected again from the hole 39 into the groove 34 in the direction of arrow d by the spring force of the mold spring 36d.

However, as shown in FIG. 37, the convex portion 72 for opening and closing the shutter of the rack member 71 is formed on the inner rotor 4.
Almost at the same time as the shirt opening / closing start convex portion 25 on the outer periphery of the lock member 36 is abutted from the direction of the arrow e, the front end side of the rack 74 also serving as the lock release portion of the rack member 71 becomes the front end 36b of the lock release arm 36a of the lock member 36. The user rides up and pushes the lock release arm 36a again in the direction of arrow c. Then, similarly to the above, the lock arm 36 of the lock member 36 is
c is rotationally urged in the direction of the arrow c, which is the unlocking direction, against the spring force of the mold spring 36d to be in the unlocked state, and thereafter, while the inner rotor 4 is rotated until immediately before the end position of the shirt opening / closing, The lock member 36 is held in its unlocked state.

Next, as shown in FIG. 38, the rack member 7
When 1 is continuously slid in the direction of the arrow e, the projection 72 for opening and closing the shutter at the tip of the slide 1 is moved to the inner rotor 4.
It is engaged in the recess 26 for opening / closing the shutter from the direction of arrow g by the spring force of the mold spring 73. Then, as the rack member 71 is continuously slid in the direction of arrow e, the shirt tab opening / closing start projection 72 rotationally drives the shirt tab opening / closing recess 28 in the arrow a direction, so that the inner rotor 4 is opened / closed. Thus, the rotational drive is started in the direction of arrow a.

Next, as shown in FIG. 39, the rack member 7
When 1 is continuously driven to slide in the direction of arrow e, the rack 74 of the rack member 71 is engaged with the partial gear 27 on the outer periphery of the inner rotor 4 in the direction of arrow e. Immediately after this engagement, the opening and closing of the shirt of the rack member 71 is started. The projecting projection 72 is relatively disengaged from the outer circumference of the inner rotor 4 in the direction of arrow h from the shirt opening / closing recess 26. Then, thereafter, as shown in FIGS. 39 to 43, the partial gear 27 of the inner rotor 4 is rotationally driven in a non-slip state by the rack 74 of the rack member 71 which is continuously slid in the direction of the arrow e, and the inner rotor 4 is rotated. 4 is strongly rotationally driven in the direction of the arrow a against the rotational sliding friction in the disc cartridge 1.

At this time, as shown in FIGS. 39 to 42, during the rotation of the partial gear 27 of the inner rotor 4 by the rack 74 of the rack member 71 in the direction of the arrow a, the lock is disengaged from the shutter opening / closing end concave portion 28. The tip of the arm 36c is guided by a gentle slope 29b and rides up onto a shirt opening / closing projection 29 which is integrally formed in an outer periphery of the outer peripheral surface 4a of the inner rotor 4 in an arc shape. And
Tip 36b of lock release arm 36a of lock member 36
Is drawn between positions where it is substantially flush with the bottom 34a of the groove 34 of the disc cartridge 1. Therefore, FIG.
1 to 42, the rack member 71 does not receive a load generated by pushing the tip 36b of the unlocking arm 36a of the lock member 36, and can move smoothly in the direction of arrow e.

FIG. 43 shows the opening / closing end position (= opening position) P2 of the inner rotor 4, immediately before the rack member 71 reaches the position shown in FIG. 43 from the position shown in FIG. In addition, the convex portion 75 for closing the opening / closing of the rack member 71 is engaged in the concave portion 28 for closing the opening / closing of the outer periphery of the inner rotor 4 by the molding spring 76 from the direction of the arrow i by the spring force of the molding spring 76, and immediately thereafter. Then, the rack 74 of the rack member 71 is disengaged from the partial gear 27 on the outer periphery of the inner rotor 4.

The rack member 71 is continuously driven to slide to the slide end position shown in FIG. 43 in the direction of arrow e in the direction of arrow e. The inner rotor 4 is rotationally driven in the direction of arrow a to the end position of the shirt opening / closing shown in FIG. The end surface 25a of the outer periphery of the inner rotor 4 for opening and closing the shirt stud 25 on the arrow a direction side contacts the inner rotor stopper 30 in the disc cartridge 1 from the direction of the arrow a, and the inner rotor 4 finishes opening and closing the hood. At the same time, the tip of the lock arm 36c of the lock member 36 is formed at the end of the outer peripheral edge of the inner rotor 4 on the direction of the arrow b of the shirt tab opening / closing end convex portion 29 by the spring force of the mold spring 36d. The inner rotor 4 is locked between the inner rotor stopper 30 and the lock arm 63c at the opening / closing end position of the inner rotor 4 by falling from the arrow c direction into the locking step 29a. Then, at this point, as described above, the pair of shutters 9 and 10 are completely opened to the shirt opening / closing end position (= opening opening position) P2, and the disc cartridge 1
The pickup insertion hole 7 of is completely opened.

By the sliding drive of the rack member 71 with respect to the disk cartridge 1 in the direction of arrow f, the inner rotor 4 is moved from the shirt opening / closing end position (= opening opening position) P2 shown in FIG. 43 to the shirt opening / closing start position shown in FIG. The operation of rotationally driving to (= opening closed position) P1 and closing the pair of shutters 9 and 10 to the opening / closing start position of the shirt as described later is the reverse operation of the above-described operation. In other words, when the rack member 71 is slid in the arrow f direction from the shirt opening / closing end position shown in FIG. 43, the shirt member opening / closing recess 28 of the rack member 71 is rotationally driven in the arrow b direction. At this time, as shown in FIG. 42, the lock arm 36c of the lock member 36 rides on the shirt opening / closing end projection 29 of the inner rotor 4 against the spring force of the mold spring 36d.

Then, as shown in FIGS. 42 to 39, the rack 74 of the rack member 71 is meshed with the partial gear 27 on the outer periphery of the inner rotor 4, so that the inner rotor 4 is indicated by the arrow b.
After being rotationally driven in a non-slip state in the direction, as shown in FIG. 38, the convex portion 72 for opening and closing the shirt tab of the rack member 71 rotationally drives the concave portion 26 for opening and closing the shirt tab on the outer periphery of the inner rotor 4 in the direction of arrow b. Then, the inner rotor 4 is returned in the arrow b direction to the opening / closing start position of the shirt. The stopper protrusion 31 and the like integrally formed on the outer circumference of the inner rotor 4 are provided on the disk cartridge 1
The inner rotor 4 comes into contact with the inner rotor stopper 30 from the direction of the arrow b, and the inner rotor 4 is stopped at the opening / closing start position of the shirt. Almost at the same time, the lock arm 36c of the lock member 36 is engaged with the inner recess 4 of the inner rotor 4 which also serves as the locking recess for ending the opening / closing of the shirt, and the inner rotor 4 is locked again at the opening / closing start position of the shirt. .

Then, as shown in FIGS. 37 to 35, the rack member 71 is continuously slid in the direction of the arrow f so that the shutter opening / closing start convex portion 72 extends from the shutter opening / closing start concave portion 26 on the outer periphery of the inner rotor 4. Mold spring 7
The rack member 71 is separated from the disk cartridge 1 in the direction of arrow f by being separated against the spring force of 3.

Next, referring to FIGS. 44 to 50, the shutter opening / closing mechanism 1 which is opened / closed by the rotation of the inner rotor 4.
The opening / closing operation of the shutter 6 will be described.
As shown in FIG. 44, when the inner rotor 4 is returned to the shutter opening / closing start position (= opening closing position) P1 described above in the direction of arrow b, the pair of shutters 9 and 10 rotate in a pair. The fulcrum pins 17 and 18 are pivoted from the direction of the arrow m, and they are brought close to each other in a substantially parallel movement at a shirt closing position which diagonally crosses the vicinity of the center of the pickup insertion hole 5. Then, along the edges of the pair of shirts 9 and 10, Z-shaped and vertically overlapping overlapping slopes 9a and 10a are overlapped with each other from above and below, so that the pickup insertion hole 5 and the inner portion of the lower shell 3 are overlapped with each other. The opening of the rotor 4 at the center overlapping with the opening 4d is closed. That is, in this shutter closed state, the entire bottom surface 4b of the inner rotor 4 and the pair of shutters 9 and 10 completely close the pickup insertion hole 5 of the lower shell 3.

On the other hand, this shutter opening / closing mechanism 16 is shown in FIG.
5 and FIG. 50, when the inner rotor 4 is rotated in the direction of arrow a to the shutter opening / closing end position (= opening opening position) P2 described above, a pair of rotation fulcrum pins 17,
By the so-called cam action of the pair of cam grooves 19 and 20 and the cam pins 21 and 22 synchronized with the pivoting movement of 18 in the direction of arrow a, the pair of shutters 9 and 10 cause the pair of pivot fulcrum pins 17 and 18 to move. The pair of shutters 9 and 10 are opened in parallel to each other by the substantially parallel movement to the positions on both sides of the pickup insertion hole 5 by being rotated in directions of arrows n which are away from each other as a center. At this time, the opening 4d of the inner rotor 4 completely overlaps the pickup insertion hole 5, and the entire area of the pickup insertion hole 5 is completely opened.

Next, FIG. 51 shows a disk drive device 6
1 shows the disc cartridge 1 inserted into the cartridge holder 64 inside the slit-shaped cartridge insertion opening 63 formed on the upper side of the front panel 62 in the direction of the arrow o. A lock arm 67, which is a lock means attached to the inside of the cartridge holder 64, is engaged with the locking recess 13 formed on the other side surface 1 d of the disk 1 to lock the disk cartridge 1 inside the cartridge holder 64 ( Be held).

Then, after this, as described above, the inner rotor 4 is rotationally driven by the rack member 71, and the shutters 9 and 10 are opened in the direction of the arrow m. After that, when the cartridge holder 64 is horizontally lowered as it is, or is horizontally pulled back once and then horizontally lowered and positioned, the spindle motor is inserted into the pickup insertion hole 5 of the disc cartridge 1. The disk table, the optical pickup, etc. (neither shown) are relatively inserted from below. Then, the disk D is moved to the inner rotor 4 by the disk table.
The disc is lifted up to an intermediate position between the upper and lower sides of the disc housing portion 6, and is centered and chucked on the disc table by the disc clamper 11. And
The disk D is rotationally driven at a constant speed by the spindle motor, and data is recorded and / or reproduced on the disk D by an optical pickup or the like.

(8) Description of first dustproof structure of disk cartridge using slide shutter Next, the first dustproof structure of the disk cartridge using slide shutter will be described with reference to FIGS. 52 to 54. As shown in FIG. 52, a disk cartridge using a slide shutter (hereinafter, simply referred to as “disk cartridge”) 81, which is an example of a recording medium storage cartridge having a recording medium storage portion formed therein, is made of synthetic resin or the like. Upper and lower shells 82 formed by a molding member,
A flat rectangular shape is formed by connecting 83 from above and below. Then, this disc cartridge 81
A disk D such as a DVD, which is a disk-shaped recording medium, is horizontally stored in a flat, circular disk storage portion 84 formed inside the disk, and is stored in a state in which the disk D is rotatable and can move up and down by a certain amount. ing.

An opening 85 for inserting a pickup or inserting a disc table is formed along the central portion of the lower shell 83 and the upper and lower shells 83, 84, and is formed in a substantially L shape for opening and closing these openings 85. A single shutter 86 having a U-shape is attached to the outside of the lower shell 83 and the upper and lower shells 82, 83, and the shutter 86 is indicated by an arrow along a side surface 81a such as a front end surface or a side surface of the disk cartridge 81. The opening 85 is configured to be opened and closed by sliding in the u and v directions. The shutter 86 is formed of a mold member such as synthetic resin or a thin metal plate such as stainless steel.

The first dustproof structure is a portion indicated by N in FIG. 52 when the shutter 86 is slid and returned to the opening closing position P21 in the direction of arrow v.
A gap portion 87 is formed at a position where both end portions 86a of the shutter 86 in the sliding direction of arrows u and v and the lower shell 83 of the disk cartridge 81 or both end portions 81b of the openings 85 of the upper and lower shells 82 and 83 overlap each other from above and below. The air AR containing the dust DT is prevented from entering the disc cartridge 81 through the opening 85 by completely sealing it with the elastic member 88 such as rubber or soft synthetic resin.

In this first dustproof structure, as shown in FIG. 53, a pair of ribs 81c are formed outside both side portions 81b of the opening portion 85 of the disc cartridge 81, and at the both end portions 86a of the shutter 86. A pair of ribs 86b are also formed on the inner side, and a pair of strip-shaped elastic members 88 are provided at both side portions 81b of the opening 85 of the disc cartridge 81 at positions adjacent to the pair of ribs 81c in the arrow u direction which is the shutter opening direction. It is attached in parallel by a fixing method such as adhesion, fitting, and fusion.

Therefore, according to the first dustproof structure, when the shutter 86 is slid back to the opening closing position P21 in the direction of arrow v, both end portions 8 of the shutter 86 are returned.
6a is pressure-bonded to the pair of elastic members 88 against the elasticity, and the opening 85 is completely sealed, so that the air AR containing the dust DT enters the disc cartridge 81 through the opening 85. Can be reliably prevented.

At this time, the elastic member 88 is shown in FIG.
5 is a tube-shaped sheared cross section of FIG.
4 (B) is a shape in which the elastic member 88 has a shear cross-section formed in a loop shape. If the elastic member 88 is formed in a tube shape or a loop shape that is easily deformed in this way, the adhesion of both end portions 86a of the shutter 86 to the elastic member 88 by pressure bonding is improved, and the air AR containing the dust DT is generated. It is possible to more reliably prevent the disk cartridge 81 from entering through the opening 85.

Further, FIG. 54C shows a pair of both end portions 86a of the shutter 86 at the tops of a pair of elastic members 88 formed in a shape such as a tube which is easily deformed. The rib 86b is configured to be pressed against the elasticity. With this configuration, the shutter 86 can be slid with respect to the center of the opening 85 in either the arrow u direction or the arrow v direction.

(9) Description of Second Dust-Proof Structure of Disk Cartridge Using Slide Shutter Next, a second dust-proof structure of the disk cartridge using slide shutter will be described with reference to FIGS. 55 to 57. This second dustproof structure is provided when the shutter 86 is slid and returned to the opening blocking position P21 in the direction of arrow v.
52, which is the portion indicated by the N portion, is both end portions 86a in the directions of arrows u and v, which are the sliding directions of the shutter 86,
The dust accumulation concave portion 8 is provided in the gap portion 87 where the lower shell 83 of the disk cartridge 81 or both side portions 81b of the opening 85 of the upper and lower shells 82, 83 are vertically overlapped.
By forming the labyrinth-shaped portion 89 having 9a, it is possible to prevent the dust DT from entering the disc cartridge 81 through the opening 85 together with the air AR.

As shown in FIG. 55, this second dustproof structure has a pair of ribs 89b, 8b formed on the outside of both side portions 81b of the opening 85 of the disc cartridge 81.
9b and a pair of ribs 86b formed inside both end portions 86a of the shutter 86, a labyrinth-shaped portion 89 having a dust accumulating concave portion 89a formed in a substantially U shape is provided. At this time, the pair of ribs 89b, 89c
Of the ribs 8 on the arrow v direction side, which is the shutter closing direction
The height of 9b is made high, and these ribs 89b are formed.
Also serves as a stopper at the opening closing position P21 of the shutter 86.

Further, the height of the ribs 89c in the arrow u direction, which is the shutter opening direction, is made low, and C-faces and R-faces are provided at the tips of the ribs 89c and the ribs 86b of the shutter 86 which face each other. Relief surfaces 89d and 86c are formed. Then, when the shutter 86 is slid back to the opening closed position P21 in the direction of arrow v, the pair of ribs 86b of the shutter 86 causes the disc cartridge 8 to move.
One pair of ribs 89c are provided with these flanks 81c, 89.
These shutters 8 are made to escape from each other by d.
6 and the arrow v against the elasticity of the disk cartridge 81.
By being fitted over between the pair of ribs 89b and 89c by overcoming in the direction, a pair of dust accumulating concave portions 89a is formed.

According to the second dustproof structure, the air AR containing the dust DT passes through the labyrinth-shaped portion 89 while being bent in a substantially U-shape, and enters the disc cartridge 81 through the opening 85. In doing so, the flow velocity of the air AR is sharply weakened in the labyrinth-shaped portion 89, and the dust DT is separated from the air AR and is deposited in the dust accumulating recess 89a, so that the dust DT is opened. It can be prevented as much as possible from entering the disk cartridge 81 from the portion 85. The second dustproof structure shown in FIG. 56 has an opening 8 of the disk cartridge 81.
5, the heights of the pair of ribs 89b and 89c on both sides are the same, and flanks 89d such as C-face and R-face are formed on the tip portions of these ribs 89b and 89c.

In the case of such a configuration, the shutter 8
9 can be slid with respect to the center of the opening 85 in either the arrow u direction or the arrow v direction. That is, when the shutter 89 is slid in the direction of the arrow u, as described above, the pair of ribs 86b of the shutter 86 is used.
Allows the pair of ribs 89c of the disk cartridge 81 to escape from each other by these flanks 81c and 89d.
You can overcome the elasticity of 1 in the direction of arrow u,
Similarly, when the shutter 89 is slid in the direction of the arrow v, the pair of ribs 86b of the shutter 86 move the pair of ribs 89b of the disk cartridge 81 into the flanks 81.
It is possible to overcome the elasticity of the shutter 86 and the disk cartridge 81 so that the shutter 86 and the disk cartridge 81 can move over each other in the direction of arrow v so that they can escape from each other.

Next, the first dustproof structure shown in FIG.
52, which is a portion indicated by an O portion, and has arrow u and v directions which are the sliding direction of the shutter 86 at one end or both ends in a direction orthogonal to the arrow u and v directions which are the sliding direction of the shutter 86. The labyrinth-shaped portion 90 is formed along a direction parallel to the above. And in this case,
A rib 86d formed on the shutter 86 is inserted between a pair of ribs 89e formed on the disk cartridge 81 to form a labyrinth-shaped portion 90 having a substantially U shape, and the rib 86d of the shutter 86 is labyrinth-shaped. An arrow u parallel to the pair of ribs 89e in the portion 90,
It is slid in the v direction.

(10) Description of Third Dustproof Structure of Slide Shutter-Used Disk Cartridge Next, the third dustproof structure of the slide shutter-used disk cartridge will be described with reference to FIGS. 58 and 59. The third dustproof structure is a portion indicated by M in FIG. 52 when the shutter 86 is slid and returned to the opening closing position P21 in the direction of the arrow v.
Both ends 86a in the directions of arrows u and v, which are the sliding directions of
And the lower shell 83 of the disk cartridge 81 or both side portions 81b of the opening 85 of the upper and lower shells 82, 83 overlap each other from the top and bottom with a plurality of turbulent flow generating uneven portions 92a, 92b. By forming the structure portion 92, it is possible to prevent the dust DT from entering the disk cartridge 81 through the opening 85 together with the air AR.

That is, in the third dustproof structure, as shown in FIG. 58, the lower shell 83 or the upper and lower shells of the disk cartridge 81 are slid and returned to the opening closing position 21 in the direction of arrow v. Both side portions 81b of the opening portion 85 of the shutters 82 and 83 are provided at both end portions 8 of the shutter 86.
These side portions 81b are fixed to the shutter 86 by a fixed dimension OL21, so that they can be overlapped on the 6a from above and below.
Overlapping OL 22 minutes. Then, by forming a plurality of turbulent flow generation uneven portions 92a on the side of the disk cartridge 81 or the side of the shutter 86 in the gap portion 91 between these both side portions 81b and both end portions 86a of the shutter 86, this gap portion is formed. Turbulent flow generating structure 9 in 91
2 is formed.

According to the third dustproof structure, the dust DT
When the air AR containing the air penetrates into the pair of turbulent flow generation structure portions 92 and tries to penetrate into the disc cartridge 81 through the opening 85 through the turbulent flow generation structure portion 92, the air AR A turbulent flow is generated in the air AR by colliding with a plurality of turbulent flow generation irregularities 92a and repeatedly changing the direction. Then, due to the generation of the turbulent flow of the air AR, the dust DT soars in the turbulent flow generation structure portion 92, and the soared dust DT is sequentially hooked to the concave portions and the convex portions of the plurality of turbulent flow generation irregular portions 92a. Then, the air is gradually separated from the air AR and accumulated in the plurality of turbulent flow generation irregularities 92a. As a result, it is possible to prevent the dust DT from entering the disc cartridge 81 through the opening 85 together with the air AR as much as possible.

In FIG. 59, a plurality of turbulent flow generation concavo-convex portions 92 are provided on both the upper and lower sides of the pair of turbulent flow generation structure portions 92 on the side of the disk cartridge 81 and the side of the shutter 86.
a is formed to face each other from above and below. When configured in this way, air A containing dust DT
When R tries to enter the disc cartridge 81 through the opening 85 through the turbulent flow generating structure 92, the turbulent flow of the air AR is promoted by the turbulent flow generating irregularities 92a on the upper and lower sides. The dust DT is easily separated from the air AR and easily deposited in the plurality of turbulent flow generation irregularities 92a.

Although the embodiments of the present invention have been described above, the present invention is not limited to the disk cartridge 1 using the inner rotor and the disk cartridge 81 using the slide shutter shown in the above-described embodiments.
The present invention can be applied to various types of cartridges that can store various types of disc-shaped recording media, card-shaped recording media, and other members other than recording media such as cleaning disks. Further, the present invention is configured such that all or part of the upper shell is configured to be openable and closable with respect to the lower shell so that various stored members can be housed in and out, and a cartridge normally called a caddy is provided. Is also applicable.

[0088]

The cartridge of the present invention constructed as described above can achieve the following effects.

In the cartridge according to the first aspect, the inner rotor is elastically pressed against the inner surface of the cartridge through the shutter by the plurality of spring action portions while the opening is closed from the inside by the rotation of the inner rotor. When the shutter closes the opening so that there is no gap between the shutter and the cartridge, air containing dust is effectively prevented from entering the cartridge through the gap. Since the dust can enter the cartridge together with the air from the opening and adhere to the surface of the disc-shaped recording medium, an error may occur during data recording and / or reproduction, or Dust that has adhered to the surface of the recording medium falls onto the surface of the objective lens of the optical pickup and irradiates the laser beam correctly. Gone come, the inconvenience to generate the recording and / or reproducing errors of data can be prevented. Therefore, the disc-shaped recording medium can be surely protected from dust, so that high density recording of the disc-shaped recording medium can be greatly promoted.

According to the cartridge of claim 2 which depends on claim 1, the plurality of spring action parts are integrally molded on the top of the outer peripheral wall of the inner rotor by a synthetic resin, and the plurality of spring action parts and the inner rotor are one component. It consists of
Cost reduction can be realized by reducing the number of parts and the number of assembly steps.

A cartridge according to claim 3 which depends on claim 2 has a plurality of cams in which a plurality of spring action portions are formed in the cartridge when the inner rotor is rotated from the open position of the opening to the closed position. By riding on the convex portion, the spring force of the plurality of spring action portions is effectively generated, and the inner rotor is elastically pressed against the inner surface of the cartridge through the shutter, thereby effectively opening the opening portion. Within the rotation range of the inner rotor, and within the range in which the multiple spring action parts do not ride on the multiple cam protrusions, the load on the inner rotor due to the multiple spring action parts is reduced. Since the inner rotor can be rotated lightly, there is almost no rattling when the shutter is opened and closed by the rotation of the inner rotor. The opening and closing drive of jitter can be carried out smoothly. Even in the state where the shutter closes the opening, the inner rotor can be surely pressed against the inner surface of the cartridge through the shutter by the plurality of spring action portions to reliably seal the opening.

A cartridge according to claim 4, which depends on claim 3, is provided with a plurality of die-inserting notches extending from the bottom of the inner rotor to the lower parts of the plurality of spring action parts through the outer peripheral wall, and the slide core. This is the simplest mold that does not use a simple split type structure, and since multiple spring action parts can be easily integrally molded on the inner rotor, the inner cost can be reduced by reducing the manufacturing cost of the mold. It is possible to reduce the manufacturing cost of the rotor.

[Brief description of drawings]

FIG. 1 is a perspective view of a disk cartridge using an inner rotor to which the present invention is applied.

FIG. 2 is a perspective view in which upper and lower shells of the same inner rotor disk cartridge are disassembled and is a perspective view in which the phases of the upper and lower shells are vertically inverted.

FIG. 3 is an exploded perspective view of a disc, an inner rotor, and a pair of shutters of the disc cartridge using the inner rotor of the same.
FIG. 6 is a perspective view in which the phases of a pair of shutters are vertically inverted.

FIG. 4 is a cross-sectional view of the same disk cartridge using the inner rotor, cut at the center and viewed from the front side.

FIG. 5 is a top view of a lower shell of the same disk cartridge using the inner rotor.

FIG. 6 is a bottom view of the upper shell of the same inner rotor disk cartridge.

FIG. 7 is a perspective view of the inner rotor of the disk cartridge using the inner rotor and the lower surface side of the pair of shutters, showing a closed state of the pair of shutters.

8 is a perspective view showing an open state of the pair of shutters in FIG. 7. FIG.

FIG. 9 is a perspective view of a lower shell of the same inner rotor disk cartridge and an upper surface side of a pair of shutters, showing a closed state of the pair of shutters.

FIG. 10 is a perspective view showing an open state of a pair of shutters in FIG.

FIG. 11 is a top view showing the lower shell of the same inner rotor disk cartridge, the inner rotor, and the pair of shutters, showing the closed state of the pair of shutters.

FIG. 12 is a top view showing an open state of the pair of shutters in FIG. 11.

13 is an enlarged cross-sectional view taken along arrows AA and BB of FIG.

FIG. 14 is a perspective view of an inner rotor of the disk cartridge using the inner rotor of the above.

FIG. 15 is an enlarged top view showing a portion C of FIG. 14 for explaining the spring action portion of the same inner rotor, and a view taken along the line DD of FIG. FIG.

FIG. 16 is an enlarged sectional view of a portion G in FIG. 11 for explaining the first dustproof structure including the spring action portion of the inner rotor of the above.

FIG. 17 is a side view taken along line HH of FIG. 16 for explaining the first dustproof structure including the spring action portion of the inner rotor of the above.

FIG. 18 is a side view illustrating two modified examples of the spring action portion of the inner rotor of the above.

FIG. 19 is a side view for explaining a problem with the basic structure of the spring action portion of the inner rotor of the above.

FIG. 20 is a top view of the lower shell of the same disk cartridge using the inner rotor, and is a top view illustrating a second dustproof structure including an elastic member that dustproofs the peripheral portion of the opening of the lower shell. .

FIG. 21 is an enlarged cross-sectional view taken along the line I-I and line J-J of FIG. 20 for explaining the second dustproof structure of the same.

FIG. 22 is an enlarged sectional view similar to FIG. 16 for explaining the second dustproof structure of the above.

FIG. 23 is a perspective view of a pair of shutters of the disc cartridge using the inner rotor of the above, and a perspective view for explaining a third dustproof structure including an elastic member for dustproofing the slope portions for overlapping of these shutters. is there.

FIG. 24 is a view for explaining a third dustproof structure for dustproofing the overlapping slope portions of the pair of shutters shown in FIG.
FIG. 9 is an enlarged cross-sectional view corresponding to the K portion of FIG. 4B, and is an enlarged cross-sectional view in which the phases of the pair of shutters are vertically inverted.

FIG. 25 is a sectional view similar to FIG. 24, showing a first modified example of the elastic member in the third dustproof structure of the above.

FIG. 26 is a sectional view similar to FIG. 24, showing a second modification of the elastic member in the third dustproof structure of the above.

27 is an enlarged cross-sectional view corresponding to a portion K in FIG. 11 for explaining a fourth dustproof structure including a labyrinth-shaped portion that dustproofs the overlapping slope portions of the pair of shutters of the disk cartridge using the inner rotor. There
FIG. 4 is a cross-sectional view showing the phases of a pair of shutters upside down.

28 is an exploded perspective view of a pair of overlapping slope portions of FIG. 27. FIG.

29A and 29B are a perspective view and a plurality of cross-sectional views showing a plurality of modified examples of the structure portion forming the labyrinth-shaped portion in the fourth dustproof structure of the above.

FIG. 30 is equivalent to part L of FIG. 11 for explaining a fifth dustproof structure including a turbulent flow generation structure part for dustproofing between the lower shell of the inner rotor disk cartridge and the outer peripheral part of the inner rotor. It is a bottom view which expanded and showed a part of bottom part of an inner rotor.

FIG. 31 is an enlarged cross-sectional view taken along the line MM of FIG. 30 for explaining the fifth dustproof structure of the above, and is a cross-sectional view in which the phases of the lower shell and the inner rotor are vertically inverted. .

FIG. 32 is a view showing a first modified example of the structure portion forming the labyrinth-shaped portion in the fifth dustproof structure of the above.
It is a bottom view similar to FIG.

FIG. 33 is a view showing a second modified example of the structure portion forming the labyrinth-shaped portion in the fifth dustproof structure of the above.
It is a bottom view similar to FIG.

FIG. 34 is a view showing a third modified example of the structure portion forming the labyrinth-shaped portion in the fifth dustproof structure of the above.
It is a bottom view similar to FIG.

FIG. 35 is a partially cutaway bottom view showing an initial rotation state of the inner rotor for explaining the inner rotor rotation mechanism using the rack member in the same disk cartridge using the inner rotor.

36 is a partially cutaway bottom view showing the start of rotational driving by the rack member of the inner rotor from the initial state of FIG. 35. FIG.

37 is a partially cutaway bottom view showing the rotation driving operation by the rack member of the inner rotor continuous to FIG. 36. FIG.

FIG. 38 is a partially cutaway bottom view showing the rotation driving operation by the rack member of the inner rotor continued from FIG. 37.

FIG. 39 is a partially cutaway bottom view showing the rotation driving operation by the rack member of the inner rotor continuous to FIG. 38.

FIG. 40 is a partially cutaway bottom view showing the rotation driving operation by the rack member of the inner rotor continued from FIG. 39.

41 is a partially cutaway bottom view showing the rotation driving operation by the rack member of the inner rotor continuous to FIG. 40. FIG.

42 is a partially cutaway bottom view showing the rotation driving operation by the rack member of the inner rotor continuous to FIG. 41. FIG.

43 is a partially cutaway bottom view showing the rotation driving operation by the rack member of the inner rotor continuous to FIG. 42. FIG.

FIG. 44 is a bottom view showing a state in which the opening of the lower shell is closed by the pair of shutters and the inner rotor of the disk cartridge using the inner rotor of the same.

45 is a bottom view showing a state where the opening portion of the lower shell of FIG. 45 is opened. FIG.

FIG. 46 is a bottom view in a perspective state showing an opening closed state for explaining how a pair of shutters is opened and closed by rotationally driving the inner rotor by a rack member in the same disk cartridge using the inner rotor.

47 is a bottom view of the perspective state showing the opening start operation of the pair of shutters from the closed state of the opening in FIG. 40. FIG.

FIG. 48 is a bottom view in a see-through state showing the opening operation of the pair of shutters continuous with FIG. 47.

FIG. 49 is a bottom view of a perspective state showing the opening operation of the pair of shutters continuous with FIG. 48.

50 is a bottom view of the perspective state showing the end of opening of the pair of shutters continuous with FIG. 49. FIG.

FIG. 51 is a perspective view showing a disc cartridge using the inner rotor and the disc drive device of the above.

52 is a perspective view of a disk cartridge using a slide shutter to which the present invention has been applied. FIG.

53 is an enlarged cross-sectional view corresponding to a portion M in FIG. 52 for explaining the first dustproof structure including the elastic member of the disk cartridge using the slide shutter of the above. FIG.

FIG. 54 is an enlarged sectional view illustrating a plurality of modified examples of the elastic member in the first dustproof structure of the above.

FIG. 55 is an enlarged cross-sectional view corresponding to a portion M in FIG. 52 for explaining the second dustproof structure including the labyrinth-shaped portion of the disk cartridge using the slide shutter of the above.

FIG. 56 is an enlarged cross-sectional view illustrating a modified example of the labyrinth-shaped portion in the second dustproof structure of the above.

FIG. 57 is an enlarged cross-sectional view corresponding to the N portion of FIG. 52 in the second dustproof structure including the same labyrinth-shaped portion.

58 is an enlarged cross-sectional view corresponding to a portion M in FIG. 52 for explaining the third dustproof structure including the turbulent flow generation structure of the disk cartridge using the slide shutter of the above. FIG.

FIG. 59 is an enlarged cross-sectional view corresponding to an M portion of FIG. 52, which illustrates a modified example of the turbulent flow generation structure portion in the third dustproof structure of the above.

FIG. 60 is a perspective view of a conventional disk cartridge using a slide shutter.

FIG. 61 is an enlarged cross-sectional view illustrating the intrusion of dust into the inside from the opening of the conventional disk cartridge using the slide shutter.

FIG. 62 is an enlarged cross-sectional view similar to FIG. 61, in which the prevention of dust intrusion from the opening of the conventional disk cartridge using the slide shutter is considered.

FIG. 63 is a sectional view similar to FIG. 62, which further considers prevention of intrusion of dust from the opening of the conventional disk cartridge using a slide shutter.

[Explanation of symbols]

D is a disc which is a disc-shaped recording medium, 1 is a disc cartridge using an inner rotor which is a disc cartridge for storing a recording medium, 2 is an upper shell, 3 is a lower shell, 4 is an inner rotor, 4b is a bottom portion of the inner rotor, 4c. Is an outer peripheral wall of the inner rotor, 4d is an opening of the inner rotor, 5 is an opening of a disc cartridge, 6 is a disc storage portion which is a disc-shaped recording medium storage portion, 9,
Reference numeral 10 is a shutter, 16 is a shutter opening / closing mechanism, 41 is a spring action portion, 41a is both ends of the spring action portion, 41b is a small protrusion of the spring action portion, 42 is a notch for inserting a mold, and 43 is a cam protrusion.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yuji Iwaki             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation (72) Inventor Naoki Inoue             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation

Claims (4)

[Claims] 1. A cartridge comprising a rotatable inner rotor and a shutter for opening and closing the opening from the inside by rotation of the inner rotor, wherein the shutter is in a closed state in which the opening is closed from the inside, A cartridge comprising a plurality of spring action portions that elastically press the inner rotor against the inner surface of the cartridge via the shutter. 2. The cartridge according to claim 1, wherein the inner rotor is formed of synthetic resin, and the plurality of spring action portions are integrally formed on a top portion of an outer peripheral wall of the inner rotor. 3. When the inner rotor is rotated from an open position in which the shutter is opened from the opening to a closed position in which the opening is closed by the shutter, the plurality of spring action parts are in the cartridge. By riding on a plurality of cam projections formed at positions facing the top of the outer peripheral wall of the inner rotor, the inner rotor is passed through the shutter, and the inner rotor is passed through the shutter by the spring force of the plurality of spring action portions. The cartridge according to claim 2, wherein the cartridge is configured to be elastically pressed against the inner surface of the cartridge. 4. A plurality of spring acting portions are integrally formed on a top portion of an outer peripheral wall of the inner rotor, and a plurality of spring acting portions extend from a bottom portion of the inner rotor to a lower portion of each of the plurality of spring acting portions on a top portion of the outer peripheral wall. The cartridge according to claim 2, wherein a notch for inserting a mold is formed.