JP2004310893A - Shutter opening/closing mechanism and disk drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To moderately and smoothly perform a shutter opening/closing operation by the rotation of an inner rotor of a disk cartridge. <P>SOLUTION: When a first recessed part 26 to be engaged with, a partial gear 27 and a second recessed part 28 to be engaged with provided an outer circumferential surface of the inner 4 rotor of the disk cartridge 1 are engaged with a first engagement projection part 78a, a rack 77a and a second engagement projection part 79a of a rack member 72 held by a holding member 71, respectively to rotate the inner rotor 4, among elastically displaceable elastic displacement pieces arranged between the holding member 71 and the rack member 72, a first elastic displacement piece 73b supports the back face side of a first elastic displacement part 78, a second elastic displacement piece 73c supports the back face side of a second elastic displacement part 79, and a third elastic displacement piece 73d supports the back face side of the rack part 77. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a shutter opening / closing mechanism for opening and closing a shutter by rotating an inner rotor of a disk cartridge, and recording and / or recording of signals on a disk-shaped recording medium housed in a case of such a disk cartridge. Alternatively, the present invention relates to a disk drive device that performs reproduction.
[0002]
[Prior art]
Conventionally, as shown in FIG. 48, a disk cartridge 201 such as a DVR, DVD, DVD-ROM, etc., has a disk D rotatably housed inside a case composed of upper and lower shells 202, 203 and has a substantially U-shaped cross section. The shutter 205 slides along one side surface 201a of the disk cartridge 201 to open and close a pair of upper and lower pickup insertion holes 204 formed in the upper and lower shells 202 and 203 from outside.
[0003]
[Problems to be solved by the invention]
However, in such a conventional disk cartridge 201, since the shutter 205 is mounted on the outside, the shutter 205 can be easily slid and opened to damage the internal disk D, There is a problem that dust or the like adheres to D to cause dropout during data recording and / or reproduction.
[0004]
Accordingly, the present invention has been proposed in view of such conventional circumstances, and a pickup is provided by rotating an inner rotor stored in a disk-shaped recording medium so that a shutter cannot be easily opened from the outside. It is an object of the present invention to provide a shutter opening / closing mechanism that enables a shutter opening / closing operation by rotation of an inner rotor in a disk cartridge in which an insertion opening is opened and closed by a shutter from the inside to be smoothly and smoothly performed.
[0005]
In addition, according to the present invention, by providing such a shutter opening / closing mechanism, the shutter can be opened / closed reliably and signals can be recorded and / or reproduced appropriately on / from a disk-shaped recording medium stored in a disk cartridge. It is an object of the present invention to provide a disk drive device capable of performing such operations.
[0006]
[Means for Solving the Problems]
To achieve this object, a shutter opening / closing mechanism according to the present invention has a disk-shaped recording medium, an inner rotor, and a shutter in a case, and the shutter opens and closes the opening of the case by rotation of the inner rotor. The opening / closing operation of the shutter is performed by rotating the inner rotor of the disk cartridge, and a holding member relatively moved along one side surface of the case, a rack held by the holding member, and a rack A first elastic displacement portion having a first engagement portion provided at a distal end portion extending along the holding member from one end, and a second elastic displacement portion having a second extending portion extending along the holding member from the other end of the rack portion. A rack member having a second elastic displacement portion provided with an engaging portion, a base member disposed between the holding member and the rack member, and abutting on the rear side of the rack portion; A first elastic displacement piece that is extended and bent toward the rack member side to be in contact with the back side of the first elastic displacement portion, and that is extended from the other end of the base and bent toward the rack member side. A second elastic displacement piece that abuts on the back side of the second elastic displacement portion, and a third elastic piece that extends from both ends of the base and is bent toward the holding member to abut on the holding member. An elastic member having a displacement piece. Then, when the holding member is relatively moved along one side surface of the case, a first engaged portion provided on an outer peripheral portion of the inner rotor facing the outside from one side surface of the case, a gear portion, The first engagement portion, the rack portion, and the second engagement portion are engaged with the second engaged portion to rotate the inner rotor.
[0007]
As described above, in the shutter opening / closing mechanism according to the present invention, among the elastically displaceable pieces of the elastic member disposed between the holding member and the rack member, the third elastically displaceable piece is located on the rear surface of the rack portion. Side, and the rack portion is pressed toward the cartridge side by the bending of the third elastic displacement piece, so that the rack portion can be properly engaged with the gear portion of the inner rotor. On the other hand, the first elastic displacement piece supports the back side of the first elastic displacement section, and the second elastic displacement piece supports the back side of the second elastic displacement section. When the first elastic displacement piece and the second elastic displacement piece of the elastic member are flexed by the flexure of the displacement section and the second elastic displacement section, the first elastic displacement section and the second elastic displacement section. Are pressed toward the case side, the first and second engagement portions provided at the distal ends of the first and second elastic displacement portions are respectively connected to the inner The first engaged portion and the second engaged portion of the rotor can be appropriately engaged.
[0008]
Also, a disk drive device according to the present invention has a disk-shaped recording medium, an inner rotor, and a shutter in a case, and the shutter opens and closes an opening of the case by rotation of the inner rotor. The disk cartridge records and / or reproduces a signal on and from a recording medium. The disk cartridge is moved between a withdrawal position where the disk cartridge is pulled out of the apparatus main body and a withdrawal position where the disk cartridge is pulled into the inside of the apparatus main body. A loading mechanism for moving; and a shutter opening / closing mechanism for opening / closing a shutter by rotating an inner rotor of the disk cartridge moved between a pulled-out position and a storage position by the loading mechanism. The shutter opening / closing mechanism includes a holding member that is relatively moved along one side surface of the case as the disk cartridge is moved by the loading mechanism, a rack that is held by the holding member, A first elastic displacement portion having a first engagement portion provided at a tip portion extending along the first portion; and a second engagement portion at a tip portion extending along the holding member from the other end of the rack portion. A rack member having a second elastic displacement portion provided, a base member disposed between the holding member and the rack member and abutting on the rear side of the rack portion, and a rack extending from one end of the base member and A first elastic displacement piece abutting on the back side of the first elastic displacement portion by bending toward the member side; and a second elastic member extending from the other end of the base and bending toward the rack member side. Abuts on the rear side of the displacement part An elastic member having a second elastic displacement piece extending from both ends of the base and having a third elastic displacement piece abutting on the holding member by bending toward the holding member, wherein the holding member is A first engaged portion, a gear portion, and a second engaged portion provided on an outer peripheral portion of the inner rotor facing the outside from one side surface of the case when relatively moved along one side surface of the case; The first engagement portion, the rack portion, and the second engagement portion are engaged with the respective portions to rotate the inner rotor.
[0009]
As described above, in the disk drive device according to the present invention, in the shutter opening / closing mechanism, of the elastic displacement pieces of the elastic member disposed between the holding member and the rack member, the third elastic displacement piece Since the rear side is supported and the rack is pressed toward the cartridge by the bending of the third elastic displacement piece, the rack can be appropriately engaged with the gear of the inner rotor. On the other hand, the first elastic displacement piece supports the back side of the first elastic displacement section, and the second elastic displacement piece supports the back side of the second elastic displacement section. When the first elastic displacement piece and the second elastic displacement piece of the elastic member are flexed by the flexure of the displacement section and the second elastic displacement section, the first elastic displacement section and the second elastic displacement section. Are pressed toward the case side, the first and second engagement portions provided at the distal ends of the first and second elastic displacement portions are respectively connected to the inner The first engaged portion and the second engaged portion of the rotor can be appropriately engaged.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a shutter opening / closing mechanism and a disk drive device to which the present invention is applied will be described in detail with reference to the drawings.
[0011]
First, a disk drive device to which the present invention is applied will be described.
[0012]
The disk drive device 61 shown in FIG. 1 records and reproduces a disk cartridge 1 containing an inner rotor and a shutter that is opened and closed by the inner rotor.
[0013]
A horizontal cartridge insertion slot 63 is opened at an upper position of the front panel 62, and a cartridge holder 64 is accommodated therein as shown in FIG.
[0014]
Then, the disc cartridge 1 is inserted horizontally from the direction indicated by the arrow A in the order shown in FIGS. 3, 4, and 5 into the cartridge holder 64 waiting at the eject position from the cartridge insertion slot 63, and the cartridge insertion sensor ( When the cartridge holder 64 is detected to be completely inserted by the cartridge holder 64 (not shown), the cartridge holder 64 is set from the eject position shown in FIG. 6 to the rear thereof, and is horizontally moved from the eject position shown in FIGS. The disk cartridge 1 is completely drawn into the disk drive device 61 from the cartridge insertion slot 63.
[0015]
Here, the cartridge holder 64 is temporarily stopped at the retracted position, and then, as described later, the inner rotor in the disk cartridge 1 is driven to rotate, and the shutter is opened inside the disk drive device 61.
[0016]
After the shutter is completely opened, the cartridge holder 64 is vertically lowered in the direction of arrow C from the retracted position shown in FIG. 7 to the loading position shown in FIGS. 8 and 10, whereby the optical disk D in the disk cartridge 1 is moved. Magnet chucking is performed on the spindle motor S by a disk clamper 11 described later in the disk cartridge 1.
[0017]
Then, the optical disk is rotationally driven by the spindle motor S, and data recording and reproduction on the optical disk D are performed by the optical pickup.
[0018]
When the disk cartridge 1 is ejected, the operation reverses to the loading operation. First, the disk cartridge 1 is vertically lifted by the cartridge holder 64 from the loading position shown in FIGS. 8 and 10 in the direction of arrow D. Then, the magnetic chuck of the optical disk D with respect to the spindle motor S by the disk clamper 11 is released, and the disk cartridge 1 is raised in the direction of arrow D and temporarily stopped at the retracted position shown in FIGS.
[0019]
Thereafter, as described later, after the shutter of the disk cartridge 1 is closed, the disk cartridge 1 is pulled out by the cartridge holder 64 in the direction of arrow B, which is forward to the eject position shown in FIG. Since a part of the cartridge 1 is projected outside the cartridge insertion slot 63, the disk cartridge 1 can be pulled out from the disk drive device 61.
[0020]
Next, a guide mechanism in the loading mechanism in the disk drive device 61 will be described.
[0021]
First, a substantially U-shaped fixed frame 82 made of a sheet metal or the like is horizontally mounted (fixed) on a chassis (not shown), and the cartridge holder 64 is housed therein. The cartridge holder 64 is also formed in a substantially U-shape by sheet metal or the like, and a pair of left and right cartridge holding portions 64b formed in a U-shape at the lower portions on both left and right sides of the top plate portion 64a are opposed to each other. It is formed horizontally.
[0022]
To the top plate portion 64a of the cartridge holder 64, a pressing spring 83 of the disc cartridge 1, a locking hook 84 of the disc cartridge 1, a cartridge insertion detection lever 85, a pair of left and right cartridge ejection levers 86, and the like are attached. .
[0023]
A holding member 71 constituting a shutter opening / closing mechanism described later is horizontally incorporated in a gap between one cartridge holding portion 64b of the cartridge holder 64 and one side plate portion 82a of the fixed frame 82. The holding member 71 is slidably held in one of the cartridge holding portions 64b of the cartridge holder 64 in the front and rear horizontal directions of the arrows e (B) and f (A). When the holder 64 is moved up and down in the directions of arrows C and D, which are vertical directions, the holding member 71 is configured to be moved in parallel with the cartridge holder 64 in the directions of arrows C and D.
[0024]
Then, the cartridge holder 64 is guided along the L-shaped movement path in the directions of arrows A and B, which are horizontal directions, and the directions of arrows C and D, which are vertical directions, between the eject position, the retracted position, and the loading position. The guide structure includes a total of four guide pins 91 protruding laterally at two front and rear sides outside the vertical left and right side surfaces of the cartridge holder 64 and the vertical left and right side plates 82a and 82b of the fixed frame 82. A total of four L-shaped guide grooves 92 are formed.
[0025]
A driving member for driving a total of four guide pins 91 along a total of four L-shaped guide grooves 92 is constituted by a pair of left and right slide cams 93 and 94. The fixed frame 82 is attached in parallel to the outer side surfaces of the left and right side plates 82a and 82b, and is configured to be slid in parallel in the directions of arrows A and B.
[0026]
The pair of left and right slide cams 93 and 94 are formed with a total of four inclined guide grooves 95 inclined at 45 ° or the like with respect to the horizontal reference. A guide pin 91 penetrates through a total of four L-shaped guide grooves 92 and is slidably inserted into a total of four inclined guide grooves 95.
[0027]
A vertical portion 95a is formed at the upper end of each of the four inclined guide grooves 95, and a horizontal portion 95b is formed at the lower end.
[0028]
As described above, according to the guide mechanism configured as described above, first, when the cartridge holder 64 is ejected in the direction of arrow B to the eject position shown in FIG. It is located at the front end of the horizontal portion 92a and in the vertical portion 95a at the upper end of each inclined guide groove 95.
[0029]
Therefore, when a pair of left and right slide cams 93 and 94 are simultaneously slid in the direction of arrow A by a driving mechanism described later, the vertical portions 95a of the respective inclined guide grooves 95 cause the respective guide pins 91 to move to the respective L-shaped guide grooves 92. Driven horizontally in the direction of arrow A along the horizontal portion 92a, the cartridge holder 64 is horizontally pulled from the eject position to the retracted position shown in FIG.
[0030]
Next, when the pair of left and right slide cams 93 and 94 are continuously slid in the direction of arrow A simultaneously, each guide pin 91 is disengaged downward from the vertical portion 95a of each inclined guide groove 95, and The cartridge holder 64 is vertically driven in the direction of arrow C along the vertical portion 92b of each L-shaped guide groove 92 by the cam action, and the cartridge holder 64 is lowered vertically in the direction of arrow C from the retracted position to the loading position shown in FIG.
[0031]
Then, when the pair of left and right slide cams 93 and 94 reach the slide stop position in the direction of arrow A, each guide pin 91 enters the horizontal portion 95b at the lower end of each inclined guide groove 95, and the cartridge holder is placed at the loading position. 64 will be stabilized horizontally.
[0032]
At the time of ejecting the cartridge holder 64, the slide cams 93 and 94 are guided by the reverse operation so that the pair of left and right slide cams 93 and 94 move from the slide stop position in the arrow A direction shown in FIG. 8 to the slide stop position in the arrow B direction shown in FIG. After the cartridge holder 64 is vertically moved in the direction of arrow D from the loading position shown in FIG. 8 to the retracted position shown in FIG. 7 by being slid in the direction of arrow B, the arrow B is moved to the eject position shown in FIG. It will be extruded horizontally in the direction.
[0033]
Next, the driving mechanism 101 in the loading mechanism will be described.
[0034]
As shown in FIGS. 13 and 14, this drive mechanism 101 is provided on a connection frame 102 such as a sheet metal, which is horizontally installed at a front position of lower ends of left and right side plates 82 a and 82 b of the fixed frame 82. A motor 103 is mounted horizontally and horizontally, and is constituted by three gears 104, 105, and 106 between the motor shaft 103a and a support shaft 103b mounted in parallel with the tip of the motor 103. In addition, a compact speed reduction mechanism 107 is incorporated.
[0035]
Further, a Geneva gear mechanism 110 is provided which is driven to rotate forward and backward by a worm 108 integrally formed with the gear 106 at the output end of the reduction mechanism 107. The Geneva gear mechanism 110 includes a first Geneva gear 111 and a , A second Geneva gear 112, and a third Geneva gear 113. The first Geneva gear 111 having the largest diameter is constantly meshed with the worm 108 by the entire circumference gear 111a and is driven to rotate. The first Geneva gear 111 has a gear missing portion 111c having a larger circumference than the partial gear 111b.
[0036]
The second Geneva gear 112 and the third Geneva gear 113 are arranged at two positions on the outer periphery of the first Geneva gear 111, and the first lock portion 112a is provided on the circumference of the second Geneva gear 112. , A first partial gear 112b, a second lock 112c, a second partial gear 112d, and a third lock 112e.
[0037]
Further, the third Geneva gear 113 is formed with a first lock portion 113a, a first partial gear 113b, a second lock portion 113c, and a second partial gear 113d.
[0038]
A small-diameter slide cam drive gear 115, which is rotationally driven by a full-peripheral gear 112f formed on the second Geneva gear 112, has a rack 116 formed horizontally along the inside of the front end of one slide cam 93. Has been engaged.
[0039]
A pair of racks 117 and 118 are also formed horizontally on the lower surfaces of the front end portions of the pair of left and right slide cams 93 and 94. A transmission shaft 119 disposed so as to cross the pair of left and right slide cams 93 and 94 at right angles is horizontally attached to a lower portion of the connecting frame 102, and is fixed to left and right ends of the transmission shaft 119. The pair of pinions 120 and 121 are engaged with the pair of left and right racks 117 and 118 on the lower surfaces of the pair of left and right slide cams 93 and 94 from below.
[0040]
A phase difference generating means 122 for generating a phase difference when the pair of left and right slide cams 93 and 94 slide is driven by a gear backlash generated between the pair of left and right racks 117 and 118 and the pinions 120 and 121. Have been.
[0041]
On the other hand, a wide gear 126 is vertically and rotatably attached to a substantially middle position in the front-rear direction of one side plate portion 82a of the fixed frame 82, and a large-diameter all-peripheral gear 113e of the third Geneva gear 113 is provided. It is always meshed with the lower end of the wide gear 126. The upper end of the wide gear 126 is always meshed with a rack 127 formed horizontally along the inside of the lower end of the holding member 71.
[0042]
Here, the operation of the loading mechanism driven by the driving mechanism 101 configured as described above will be described.
[0043]
First, in a state where the cartridge holder 64 has been ejected in the direction of arrow B to the ejection position shown in FIGS. 3 and 6, the phases of the first, second, and third Geneva gears 111, 112, and 113 of the Geneva gear mechanism 110 are as follows. It is in the standby state shown in FIG. At this time, the third Geneva gear 113 is engaged with the gear missing portion 111c of the first Geneva gear 111 by the first lock portion 113a, and the rotation is locked (stopped). Further, the holding member 71 is slid and returned in the direction of the arrow A (f) with respect to the cartridge holder 64.
[0044]
Next, as shown in FIGS. 4 and 6, when the disc cartridge 1 is correctly inserted into the cartridge holder 64 from the direction of arrow A to the insertion completed position, the pair of left and right symmetrical cartridge ejection levers 86 is moved in the direction of arrow E. And the cartridge insertion detection lever 85 is also rotated in the direction of arrow F, so that the completion of insertion of the disk cartridge 1 to the correct position is detected by the cartridge insertion sensor (not shown), and the disk cartridge 1 is held down. It is pressed into the cartridge holder 64 by the spring 83.
[0045]
Next, the motor 103 is driven to rotate forward, the output of the motor 103 is reduced by the reduction mechanism 107, and the worm 108 starts rotating the first Geneva gear 111 of the Geneva gear mechanism 110 in the direction of arrow G via the entire circumference gear 111a. . Then, the partial gear 111b of the first Geneva gear 111 pushes the first lock portion 112a of the second Geneva gear 112, meshes with the first partial gear 112b, and drives the second Geneva gear 112 to rotate in the direction of arrow H. Then, the slide cam drive gear 115 is rotationally driven in the direction of arrow I by the entire circumference gear 112e of the second Geneva gear 112, and the slide cam drive gear 115 drives one slide cam 93 in the direction of arrow A via the rack 116. As a result, the cartridge holder 64 is automatically retracted in the direction of arrow A from the eject position shown in FIGS. 4 and 6 to the retracted position shown in FIGS.
[0046]
Next, when the horizontal retraction of the cartridge holder 64 is completed, the state shown in FIG. 16 is reached, and the second Geneva gear 112 is engaged with the gear missing portion 111c of the first Geneva gear 111 by the second lock portion 112c, and the rotation is locked (stopped). ) Is done.
[0047]
On the other hand, the first Geneva gear 111 is continuously driven to rotate in the direction of arrow G by the worm 108, and the partial gear 111b of the first Geneva gear 111 pushes the first lock portion 113a of the third Geneva gear 113, and the first partial gear 113b The third Geneva gear 113 is rotationally driven in the direction of arrow J. Then, as shown in FIG. 19, the entire peripheral gear 113c of the third Geneva gear 113 drives the wide gear 126 to rotate in the direction of arrow K, and the rack 127 of the holding member 71 is shown by a solid line in FIG. From the position shown in FIG. 7 to the position shown by the one-dot chain line in FIG. 7 and shown in FIG. 20, it is slid in the direction of arrow B (e) by the wide gear 126. Then, a shutter opening operation of the disk cartridge 1 described later is executed.
[0048]
Next, when the shutter opening / closing operation of the disc cartridge 1 is completed, the state shown in FIG. 17 is obtained, and the third Geneva gear 113 is re-engaged with the gear missing portion 111c of the first Geneva gear 111 by the second lock portion 113d, and the rotation is locked. (Stopped). On the other hand, as shown in FIG. 17, the first Geneva gear 111 is continuously driven to rotate in the direction of arrow G by the worm 108, and the second partial gear 111 d of the first Geneva gear 111 pushes the second lock portion 112 c of the second Geneva gear 112. The second Geneva gear 112 is driven to rotate again in the direction of arrow H by engaging with the second partial gear 112d. Then, the slide cam drive gear 115 slides the slide cam 93 again in the direction of arrow A via the rack 116, and during this time, the cartridge holder 64 is moved from the retracted position shown in FIG. 7 to the loading position shown in FIG. It is driven downward in the direction of arrow C to the right. At this time, the holding member 71 is lowered in parallel with the cartridge holder 64 to the position shown in FIG. 8 and the direction shown by FIG. 21 in parallel with the arrow c while the rack 127 is engaged with the wide gear 126.
[0049]
Next, when the loading operation of the cartridge holder 64 is completed, as shown in FIG. 18, both the second Geneva gear 112 and the third Geneva gear 113 are driven by the third lock portion 112f and the second lock portion 113d to form the gear of the first Geneva gear 111. It is locked (stopped) by engaging with the defective portion 111c. At this time, the third lock portion 112f of the second Geneva gear 112 prevents the first Geneva gear 111 from running out of control in the arrow G direction.
[0050]
The operation of ejecting the disc cartridge 1 from the loading position to the ejecting position is performed by the reverse rotation of the motor 103, which is the reverse of the above-described loading operation.
[0051]
Next, after the disk cartridge 1 is vertically lifted in the direction of arrow D to the retracted position shown in FIG. 7, a pair of shutters in the disk cartridge 1 are closed, and then the disk cartridge 1 is moved to the ejected position by arrow B. Ejected in the direction. During this time, the hook 84 is removed from the disk cartridge 1, and a part of the disk cartridge 1 is pushed out from the cartridge insertion slot 63 of the disk drive device 61 by the pair of left and right cartridge discharge levers 86.
[0052]
By the way, in the disk drive device 61, the third Geneva gear 113 of the Geneva gear mechanism 110 and the holding member 71 that constitutes a shutter opening / closing mechanism, which will be described later, are always held in a meshing state by the wide gear 126. The phase shift between the pair of slide cams 93 and 94 and the holding member 71 can be completely prevented. During loading, the shutter of the disc cartridge 1 is always opened after the retraction of the disc cartridge 1 is completed. can do. Further, the vertical lowering of the cartridge holder 64 can be reliably inhibited until the shutter opening operation is completely completed.
[0053]
Therefore, the loading operation and the ejecting operation of the cartridge holder 64 and the opening and closing operation of the shutter can be sequentially and accurately performed, and these operations are not disturbed, and the lock due to the mechanical distortion or the like does not occur. It can always operate smoothly.
[0054]
Further, by providing the phase difference generating means 122 generated by gear backlash in the power transmission mechanism between the pair of left and right slide cams 93 and 94, when the cartridge holder 64 shown in FIG. The main slide cam 93 side of the cartridge holder 64 is lowered prior to the driven slide cam 94 side.
[0055]
Further, when the cartridge holder 64 shown in FIG. 12 is raised in the direction of the arrow D, the main slide cam 93 of the cartridge holder 64 is raised before the driven slide cam 94 side.
[0056]
As a result, when the disk cartridge 1 is raised from the loading position in the direction of arrow D by the cartridge holder 64 and the internal optical disk D is pulled upward against the magnetic force of the chucking magnet of the spindle motor S, the optical disk D is lifted. The cartridge holder 64 can be intentionally inclined to the spindle motor S to be separated from the spindle motor S so as to be separated from the spindle motor S. A rotational moment M is applied to the optical disk D that is horizontally magnetically chucked by the disk clamper 11 on the spindle motor S. be able to. This makes it possible to easily separate the optical disk D upward (in the direction of arrow D) from the spindle motor S by utilizing the leverage principle, thereby greatly reducing the load applied to the spindle motor S and the disk cartridge 1. it can.
[0057]
Next, the shutter opening / closing mechanism 70 to which the present invention is applied will be described.
[0058]
As shown in FIGS. 22 and 23, the shutter opening / closing mechanism 70 includes a holding member 71 slidably supported in one of the cartridge holding portions 64b of the above-described cartridge holder 64 in the front-rear horizontal direction. A rack member 72 to be held and an elastic member 73 arranged between the rack member 72 and the holding member 71 are provided.
[0059]
The holding member 71 is formed by molding a synthetic resin material or the like into a substantially rectangular flat plate shape, and has a holding recess 74 for holding the rack member 72 and the elastic member 73 on one main surface side. Have been. The holding recess 74 is formed at a depth sufficient to hold the rack member 72 and the elastic member 73 along the longitudinal direction of the holding member 71, and has a rack member 72 and an elastic member A positioning protrusion 75 for positioning the position 73 is provided. Further, a first elastic displacement portion 78 of the rack member 72 and a first elastic displacement piece 73b of the elastic member 73, which will be described later, and a second elastic elastic member 72 of the rack member are provided at both ends in the longitudinal direction of the holding concave portion 74. A pair of through holes 76 into which the displacement portion 79 and the second elastic displacement piece 73c of the elastic member 73 can enter are formed.
[0060]
On the other hand, on the other main surface side of the holding member 71, as shown in FIGS. 19 to 21, the above-mentioned rack 127 is formed along the lower edge over the entire region in the longitudinal direction. The end portion 127a on the A direction side is formed as a wide portion that is opened over the entire region of the holding member 71 in the short direction. Since the rack 127 is always meshed with the upper end side of the above-described wide gear 126, the holding member 71 drives the wide gear 126 to rotate in the direction of the arrow K so that the arrows A (f) and B ( e) Displacement drive in the direction.
[0061]
The holding member 71 slides in the directions of the arrows C and D integrally with the cartridge holder 64 when the cartridge holder 64 is moved up and down in the directions of the arrows C and D, which are the vertical directions. As described above, in the holding member 71, by forming the end 127a of the rack 127 in the direction of arrow A wide, the relative sliding stroke of the wide gear 126 and the rack 71 in the vertical direction at the end 127a. Can be increased, and the cartridge holder 64 can be lowered in the direction of arrow C with a sufficiently large stroke to the loading position.
[0062]
The rack member 72 is formed by molding a synthetic resin or the like into an elongated shape. The rack member 77 is held in the holding recess 74 of the holding member 71 described above. It has a first elastic displacement portion 78 extending along 71 and a second elastic displacement portion 79 extending along the holding member 71 from the other end of the rack portion 77.
[0063]
A rack 77a is formed in the rack portion 77 over a predetermined region in the longitudinal direction, and a positioning recess 80 to be engaged with the positioning projection 75 of the holding recess 74 described above is formed in an intermediate portion thereof. Is provided. Thus, the rack member 72 is held in a state where the rack portion 77 is positioned in the holding recess 74.
[0064]
The first elastic displacement portion 78 has a distal end portion that is elastically displaceable, and has a front end portion that engages with a first engaged concave portion 26 provided on an outer peripheral surface 4a of the inner rotor 4 described later. A first engaging projection 78a to be combined is formed to project.
[0065]
The second elastic displacement portion 79 has a distal end portion capable of being elastically displaced, and has a front end portion which engages with a second engaged concave portion 28 provided on an outer peripheral surface 4a of the inner rotor 4 described later. A second engaging projection 79a to be combined is formed to project. The distal end of the second elastic displacement portion 79 is located on the back side of the second engaging projection 79a and is in contact with a second elastic displacement piece 73c of the elastic member 73 described later. The contact protrusion 79b is formed to protrude.
[0066]
The first elastic displacement portion 78 extends from the bottom of the rack a located at the foremost end of the rack portion 77. On the other hand, the second elastic displacement portion 79 extends from the tooth tip portion of the rack 77a located at the rearmost end of the rack portion 77. The rack member 72 is configured such that the positions of the base end of the first elastic displacement portion 78 and the base end of the second elastic displacement portion 79 are in such an asymmetric shape, so that the first rotor of the inner rotor 4 described later can be formed. Of the first engaging protrusion 78a, the rack 77a, and the second engaging protrusion 79a with respect to the engaged concave portion 26, the partial gear 27, and the second engaged concave portion 28 (see FIG. Meshing) can be performed smoothly.
[0067]
The elastic member 73 is made of a leaf spring, and is provided with a base 73a abutting on the rear side of the rack portion 77, a first elastic displacement piece 73b extending along one end of the base 73a along the holding member 71, and a base 73a. A second elastic displacement piece 73c extending along the holding member 71 from the other end of the base member, and a first elastic displacement piece 73b and a second elastic displacement piece extending from both ends of the base 73a along the holding member. It has four third elastic displacement pieces 73d provided side by side with 73c interposed therebetween.
[0068]
In the middle part of the base 73a, there is provided a positioning recess 85 which is engaged with the positioning projection 75 of the holding recess 74 described above. Thereby, the elastic member 73 is held in a state where the base 73 a is positioned in the holding recess 74.
[0069]
The first elastic displacement piece 73b is in contact with the back side of the first elastic displacement portion 78 by bending the intermediate portion toward the rack member 72 side. As a result, the first elastic displacement piece 73b supports the back side of the first elastic displacement portion 78, as shown in FIG. 24, and the first elastic displacement portion 78 bends. Since the first elastic displacement piece 73b also bends, the distal end of the first elastic displacement portion 78 is pressed toward the outer peripheral surface of the inner rotor 4 described later.
[0070]
The second elastic displacement piece 73c is in contact with the contact projection 79b on the back side of the second elastic displacement part 79 by bending the intermediate part toward the rack member 83 side. As a result, the second elastic displacement piece 73c supports the back side of the second elastic displacement part 79, as shown in FIG. 25, and the second elastic displacement piece 73b, like the first elastic displacement piece 73b, The second elastic displacement piece 73c also bends when the second elastic displacement part 79 of the second elastic displacement part 79 bends, so that the distal end of the second elastic displacement part 79 is pressed toward the outer peripheral surface of the inner rotor 4 described later. become.
[0071]
The third elastic displacement piece 73d has a shape whose base end is bent toward the holding member 71 and whose distal end is bent toward the rack member 72 such that the distal end thereof is substantially parallel to the main surface of the base 73a. ing. Further, the third elastic displacement piece 73d is arranged in the holding recess 74, and functions as a leg arranged at the four corners of the base 73a. That is, as shown in FIG. 26, the third elastic displacement piece 73d supports the rear side of the rack portion 77 in contact with the base 73a, and the third elastic displacement piece 73d is bent by the bending of the third elastic displacement piece 73d. Is pressed toward the outer peripheral surface of the inner rotor 4 described later.
[0072]
Next, as shown in FIG. 27, the opening and closing operation of the shutter of the disk cartridge 1 by the above-described shutter opening and closing mechanism 70 will be described.
[0073]
28 to 36 shown below, the direction of arrow a is the rotation direction for opening the shutter of the inner rotor 4, and the direction of arrow b is the rotation direction for closing the shutter.
[0074]
First, FIG. 28 shows an initial state in which the inner rotor 4 is returned to the shutter opening / closing start position in the arrow b direction and locked by the lock member 36. At this time, the shutter opening / closing start projection 25, which is an arc-shaped projection integrally formed in an arc shape on the outer peripheral surface 4 a of the inner rotor 4, is formed in the groove 34 formed in one side surface 1 c of the disc cartridge 1. The bottom opening 34a protrudes in an arc shape into the concave groove 34 through a rectangular window hole 35 opened at a substantially central position in the longitudinal direction, and the shutter opening / closing start projection 25 closes the window hole 35. I have. The first engaged concave portion 26 for opening and closing the shutter in the inner rotor 4 formed substantially at the center of the shutter opening and closing start convex portion 25 in the circumferential direction is formed in the length direction of the window hole 35. It is positioned approximately at the center.
[0075]
Then, on the outer peripheral surface 4 a of the inner rotor 4, a partial gear 27 integrally formed in an arc shape from the shutter opening / closing start projection 25 to the arrow b direction side from the window hole 35 in the arrow b direction side in the disk cartridge 1. It is drawn and hidden.
[0076]
Further, the second engaged concave portion 28 for locking and opening / closing the shutter is formed on the outer peripheral surface 4a of the inner rotor 4 at a position deviated from the partial gear 27 in the direction of arrow b by a predetermined distance. The member 36 is locked. The lock member 36 is formed in a substantially Y-shape with a molded part such as a synthetic resin, and has an arrow c around a fulcrum pin 38 integrally formed at a position near the outer periphery of the inner rotor 4 in the lower shell 3. , And d. The distal end 36b of the unlocking arm 36a of the lock member 36 is a bottom 34a of the groove 34, and an arrow 39 is formed in the groove 34 through a hole 39 formed at a position offset from the window 35 toward the front surface 1a. It protrudes from the d direction. A lock arm 36c formed on the opposite side of the lock release arm 36a of the lock member 36 and formed substantially bifurcated is formed by the second engaged recessed portion of the inner rotor 4 by the weak spring force of the mold spring 36c. 28 to lock the inner rotor 4.
[0077]
Therefore, in this initial state, the pickup insertion hole 7 of the disc cartridge 1 shown in FIGS. 38 to 42, which will be described later, is closed from the inside by the pair of shutters 9 and 10, and the inner rotor that opens and closes the shutters 9 and 10 is driven. Since the partial gear 27 on the outer periphery of the inner rotor 4 is concealed in the disk cartridge 1, even if the lock of the inner rotor 4 is released by pushing the lock release arm 36a of the lock member 36 in the direction of arrow c with a finger, 27 cannot be opened by operating the inner rotor 4 and operating the shutters 9 and 10 by operating the disk 27 from outside the disk cartridge 1 with a finger.
[0078]
Next, FIGS. 29 to 36 show that the rack member 72 is integrated with the holding member 71 and the elastic member 73 (not shown) of the shutter opening / closing mechanism 70 along the one side surface 1c of the disk cartridge 1 in the direction of arrow e. FIG.
[0079]
As shown in FIG. 29, when the rack member 72 is slid in the direction of arrow e with respect to the disc cartridge 1 to a predetermined position, the rack member 72 is provided at the distal end of the first elastic displacement portion 78. The first engagement projection 78a pushes the tip 36b of the lock release arm 36a of the lock member 36 in the direction of arrow c. Then, the lock arm 36c of the lock member 36 is rotated in the direction of arrow c against the mold spring 36d to be disengaged from the second engaged concave portion 28 of the inner rotor 4, and the lock of the inner rotor 4 is released. .
[0080]
Next, when the rack member 72 is continuously slid in the direction of the arrow e, the first engagement projection 78a is disengaged from the distal end 36b of the unlocking arm 36a of the lock member 36 in the direction of the arrow e, and The tip 36b of the unlocking arm 36a is again projected from the hole 39 into the concave groove 34 in the direction of arrow d by the spring force of the mold spring 36d.
[0081]
However, as shown in FIG. 30, almost simultaneously with the first engaging projection 78 a of the rack member 72 being brought into contact with the shutter opening / closing start projection 25 on the outer periphery of the inner rotor 4 from the direction of the arrow e, the rack The distal end side of the rack 74a also serving as the unlocking portion of the member 72 rides on the distal end 36b of the unlocking arm 36a of the lock member 36, and pushes the unlocking arm 36a again in the direction of arrow c.
[0082]
Then, the lock arm 36c of the lock member 36 is urged to rotate in the arrow c direction which is the unlocking direction against the spring force of the mold spring 36d to be in the unlocked state, and thereafter the inner rotor 4 is moved to the shutter opening / closing end position. The lock member 36 is kept in the unlocked state while the lock member 36 is being rotated until just before.
[0083]
Next, as shown in FIG. 31, when the rack member 72 is continuously slid in the direction of the arrow e, the first engaging projection 78a at the tip is inserted into the first engaged concave portion 26 of the inner rotor 4. The first elastic displacement portion 78 and the first elastic displacement piece 73b of the elastic member 73 engage in the direction of arrow g by the spring force. Then, when the rack member 72 is continuously slid in the direction of arrow e, the first engaging projection 78a rotates the second engaged recessed portion 28 in the direction of arrow a, and the inner rotor 4 The rotation driving is started from the opening / closing start position in the direction of arrow a.
[0084]
Next, as shown in FIG. 32, when the rack member 72 is continuously slid in the direction of the arrow e, the rack 74a of the rack member 72 is attached to the partial gear 27 on the outer periphery of the inner rotor 4 and the third member of the elastic member 73. The elastic displacement pieces 83 mesh with each other in the direction of arrow e due to the spring force. Immediately after this meshing, the first engaging projections 78a of the rack member 72 are relatively displaced from the first engaged concave portions 26 on the outer periphery of the inner rotor 4. Is separated in the direction of arrow h.
[0085]
Then, as shown in FIGS. 32 and 33, the partial gear 27 of the inner rotor 4 is rotationally driven in a non-slip state by the rack 74a of the rack member 72 which is continuously slid in the direction of arrow e, and the inner rotor 4 is strongly rotated in the direction of arrow a against the sliding friction in the disk cartridge 1.
[0086]
At this time, as shown in FIGS. 34 and 35, during the rotation of the partial gear 27 of the inner rotor 4 in the direction of the arrow a by the rack 74a of the rack member 72, the second engagement projection 79a of the rack member 72 is Since the tip 36b of the unlocking arm 36a of the lock member 36 is pushed again in the direction of arrow c against the mold spring 76, the lock arm 36c is pressed against the outer peripheral surface 4a of the inner rotor 4 against the spring force of the mold spring 36d. The shutter is relatively mounted on the shutter opening / closing end projection 29 which is integrally formed in an arc shape on the outer periphery.
[0087]
FIG. 36 shows the shutter open / close end position of the inner rotor 4, and immediately before the rack member 72 reaches the position shown in FIG. 35 from the position shown in FIG. The mating convex portion 79a is engaged in the second engaged concave portion 28 on the outer periphery of the inner rotor 4 from the direction of arrow i by the spring force of the second elastic displacement portion 79 and the second elastic displacement piece 73c of the elastic member 73. Immediately thereafter, the rack 74a of the rack member 72 is separated from the partial gear 27 on the outer periphery of the inner rotor 4.
[0088]
Then, the rack member 72 is slid in the direction indicated by arrow e in the direction indicated by arrow e to the slide end position shown in FIG. 36, the inner rotor 4 is driven to rotate in the direction of arrow a to the shutter opening / closing end position shown in FIG. Then, the end face of the first engaged concave portion 26 on the outer periphery of the inner rotor 4 in the direction of arrow a contacts the inner rotor stopper 30 in the disc cartridge 1 from the direction of arrow a, and the inner rotor 4 opens and closes the shutter. At the same time, the lock arm 71c of the rack member 72 is moved by the spring force of the mold spring 71d to the end surface 29a of the shutter opening / closing end projection 29 on the outer side of the inner rotor 4 in the direction of arrow b in the direction of arrow c. As a result, the inner rotor 4 is locked between the inner rotor stopper 30 and the lock arm 71c at the shutter open / close end position.
[0089]
At this point, as described later, the pair of shutters 9 and 10 are completely opened to the shutter open / close end position, and the pickup insertion hole 7 of the disc cartridge 1 is completely opened.
[0090]
The inner rotor 4 is driven to rotate from the shutter opening / closing end position shown in FIG. 36 to the shutter opening / closing start position shown in FIG. 31 by the slide driving of the rack member 72 with respect to the disk cartridge 1 in the direction of the arrow f. The operation of closing the pair of shutters 9 and 10 to the shutter opening / closing start position is the reverse operation of the above operation.
[0091]
That is, when the rack member 72 is slid in the direction of arrow f from the shutter opening / closing end position shown in FIG. 36, the second engaged concave portion 28 of the rack member 72 is driven to rotate in the direction of arrow b. At this time, as shown in FIG. 35, the lock arm 36c of the lock member 36 rides on the shutter opening / closing end projection 29 of the inner rotor 4 against the spring force of the mold spring 36d.
[0092]
Then, as shown in FIGS. 35 to 32, after the rack 74a of the rack member 72 is meshed with the partial gear 27 on the outer periphery of the inner rotor 4, the inner rotor 4 is rotationally driven in a non-slip state in the direction of arrow b. As shown in FIG. 31, the first engaged concave portion 26 on the outer periphery of the inner rotor 4 is rotated in the direction of arrow b by the first engaging convex portion 78a of the rack member 72, and the inner rotor 4 is opened and closed. It is returned in the direction of arrow b to the start position. Then, the stopper projections 31 integrally formed on the outer periphery of the inner rotor 4 abut against the inner rotor stopper 30 of the disk cartridge 1 in the direction of the arrow b, and the inner rotor 4 is stopped at the shutter opening / closing start position. At about the same time, the lock arm 36c of the lock member 36 is engaged in the second engaged concave portion 28 of the inner rotor 4, and the inner rotor 4 is locked again at the shutter opening / closing start position.
[0093]
Then, as shown in FIGS. 30 to 28, the rack member 72 is continuously slid in the direction of the arrow f, and the first engagement projection 78 a is moved from the first engagement recess 26 on the outer periphery of the inner rotor 4. The rack member 72 is detached against the spring force of the mold spring 73 and is separated from the disk cartridge 1 in the direction of arrow f.
[0094]
Next, the disk cartridge 1 using the inner rotor 4 will be described.
[0095]
First, as shown in FIGS. 37 to 39, the upper and lower shells 2, 3 of the disk cartridge 1, the inner rotor 4, the pair of shutters 9, 10, and the like are formed by a mold member such as a synthetic resin. The front surface 1a of the case, which is formed into a flat, substantially square shape by joining upper and lower shells 2, 3 having a substantially symmetric shape from above and below, is curved in a gentle arc shape, and has a rear surface formed in a straight line. Symmetrical tapered portions are formed at both left and right ends of 1b, and left and right side surfaces 1c and 1d are formed in parallel. A concave groove 34 is formed horizontally along the center in the thickness direction of one side surface 1c, and a window hole 35 and a hole 39 are opened in the bottom surface 34a of the concave groove 34. An elongated pickup insertion hole 5 is formed from substantially the center of the lower shell 3 to the center of the front surface 1a.
[0096]
The inner rotor 4 is formed in a circular dish shape, and a circular outer peripheral wall 4c is integrally formed on an outer periphery of a bottom 4b, and has the same shape as the pickup insertion hole 5 of the lower shell 3 from the center to the outer periphery of the bottom 4b. Opening 4d is formed. The inner rotor 4 is horizontally incorporated in a circular rotor housing 8 formed between the upper and lower shells 2 and 3 and is rotatably mounted on the bottom 4 b of the inner rotor 4. An optical disk D such as a DVR, which is a disk-shaped recording medium, is stored in a disk storage portion 6 formed inside the outer peripheral wall 4c in a horizontal state, rotatable, and capable of moving up and down by a fixed amount.
[0097]
A substantially disk-shaped disk clamper 10 formed of a ferromagnetic member is attached to the center of the lower surface of the upper shell 2 by a clamper support ring 12 fixed to the lower surface of the upper shell 2 by welding or the like. The disk clamper 10 is rotatable with respect to the upper shell 2 and is supported so as to be able to move up and down within a certain range in the vertical direction. A substantially U-shaped bulge 2a is formed at the center of the upper surface of the upper shell 2. 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.
[0098]
A pair of thin plate-shaped shutters 9 and 10 formed in a substantially semicircular shape are provided in a shutter storage space 7 which is a space formed horizontally between the bottom 4b of the inner rotor 4 and the lower shell 3. It is stored at the same height.
[0099]
A shutter 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 4 b of the inner rotor 4 and the lower shell 3. The shutter opening / closing mechanism 16 is integrally formed at the lower surface of the bottom portion 4b of the inner rotor 4 at a position facing 180 °, and rotatably supports opposite ends of the pair of shutters 9 and 10 to each other. Also, a pair of rotation fulcrum pins 17 and 18 that are integrally rotated with the inner rotor 4 and a pair of substantially parallel cam grooves 19 and 20 formed at opposite ends of the pair of shutters 9 and 10 are provided. , And a pair of cam pins 21 and 22 which are fixed pins integrally formed at 180 ° facing positions on the bottom 4b of the lower shell 3.
[0100]
As shown in FIG. 40, the arrangement of the shutter opening / closing start projection 25, the first engaged concave portion 26, the partial gear 27, and the second engaged concave portion 28 on the outer periphery of the inner rotor 4 The start projection 25 is formed in an arc shape along the maximum radius R1 of the inner rotor 4, and the partial gear 27 is formed in an arc shape along an intermediate radius R2 having the maximum radius R1 as an inscribed circle. Is formed on the outer peripheral surface 4a having the minimum radius R3.
[0101]
Next, the opening and closing operation of the shutter mechanism 16 that is opened and closed by the rotation of the inner rotor 4 will be described.
[0102]
As shown in FIG. 41, when the inner rotor 4 is rotated and returned in the direction of arrow b to the shutter opening / closing start position (shutter closed position) as shown in FIG. It is rotated about the pins 17 and 18 in the direction of arrow m to approach each other at the shutter closing position obliquely crossing the vicinity of the center of the pickup insertion hole 5. Along the edges of the pair of shutters 9, 10, the Z-shaped overlapping slopes 9 a, 10 a formed vertically symmetrically overlap each other, and overlap with the pickup insertion hole 5 of the lower shell 3. The opening at the central overlap with the opening 4d of the rotor 4 is closed. That is, in this shutter closed state, the entire area of the pickup insertion hole 5 of the lower shell 3 is completely closed by the bottom 4 b of the inner rotor 4 and the pair of shutters 9 and 10.
[0103]
On the other hand, as shown in FIG. 42, when the inner rotor 4 is rotated in the direction of arrow a to the shutter open / close end position (shutter open position) as shown in FIG. By a so-called cam action of the pair of cam grooves 19 and 20 and the cam pins 21 and 22 synchronized with the turning operation in the direction, the pair of shutters 9 and 10 move away from each other about the pair of turning fulcrum pins 17 and 18. The pair of shutters 9 and 10 are opened in parallel to the positions on both sides of the pickup insertion hole 5 by being rotated in the direction of arrow n. 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.
[0104]
Further, the rack member 72 is relatively slid in the direction of arrow e along one side surface (reference surface 23) 1c of the disk cartridge 1, and the first engagement projection 78a, the rack 74 and the second The inner rotor 4 is opened and closed as shown in FIG. 43 while the engaging projections 79a are sequentially engaged and meshed with the first engaged concave portion 26, the partial gear 27, and the second engaged concave portion 28 of the inner rotor 4. When rotating from the start position (shutter closed position) to the shutter open / close end position (shutter open position) shown in FIG. 47 finally through the states shown in FIGS. 47 shows a sequence of opening the pair of shutters 9 and 10 from the shutter closing position shown in FIG. 43 to the shutter opening position shown in FIG.
[0105]
In the shutter opening / closing mechanism 70 described above, among the elastically displaceable pieces of the elastic member 73 disposed between the holding member 71 and the rack member 72, the third elastically displaceable piece 73d is The rear side is supported, and the rack portion 77 is pressed against the outer peripheral surface of the inner rotor 4 by the bending of the third elastic displacement piece 73d. As a result, the partial gear 27 of the inner rotor 4 and the rack 74a can be deeply meshed with each other, and it is possible to prevent disengagement (tooth jump) between the two.
[0106]
On the other hand, since the first elastic displacement piece 73b supports the back side of the first elastic displacement part 78 and the second elastic displacement piece 73c supports the back side of the second elastic displacement part 79, these racks When the first elastic displacement portion 78 and the second elastic displacement portion of the member 72 flex, the first elastic displacement piece 73b and the second elastic displacement piece 73c of the elastic member 73 flex, and the first elastic displacement piece 73b and the second elastic displacement piece 73c flex. The second elastic displacement portion 79 and the second elastic displacement portion 79 are pressed against the outer peripheral surface of the inner rotor 4. As a result, the first engagement protrusion 78a and the second engagement protrusion 79a provided at the distal ends of the first elastic displacement portion 78 and the second elastic displacement portion 79 are respectively connected to the inner rotor 4 The first engaged concave portion 26 and the second engaged concave portion 28 can be reliably engaged or disengaged.
[0107]
Further, the elastic member 73 is set such that the first elastic displacement piece 73b and the second elastic displacement piece 73c have a smaller spring constant than the third elastic displacement piece 73d. That is, in the elastic member 73, the first elastic displacement piece 73b and the second elastic displacement piece 73c are more easily bent than the third elastic displacement piece 73d.
[0108]
As described above, the elastic member 73 is a single leaf spring, but is a single leaf spring, so that operation failure due to dimensional variation is eliminated and the shutter opening / closing operation by rotation of the inner rotor 4 is always performed. And the first elastic displacement piece 73b and the second elastic displacement piece that support the back sides of the first elastic displacement portion 78 and the second elastic displacement portion 79. The strength and strength of the spring force by 73c can be added.
[0109]
Thus, the spring force of the third elastic piece 73c is set so that the pressing force of the rack 74a against the partial gear 27 of the inner rotor 4 is appropriate, and the first elastic displacement portion 78 and the second elastic displacement portion Engagement of the first engagement projection 78a and the second engagement projection 79a provided at the distal end of the first engagement recess 79 with the first engaged recess 26 and the second engaged recess 28 of the inner rotor 4. Alternatively, it is possible to set the spring force of the second elastic displacement piece 73b and the second elastic displacement piece 73c so that the spring force in the detaching direction becomes appropriate.
[0110]
As described above, in the shutter opening / closing mechanism 70, the rack member 72 held by the holding member 71 is relatively slid along the one side surface 1c of the disk cartridge 1 in the directions indicated by the arrows e and f, whereby the rack The first engaging projection 78a, the rack 74a, and the second engaging projection 79a of the member 71 are respectively connected to the first engaged concave portion 26 provided on the outer peripheral surface of the inner rotor 4, The inner rotor 4 can be reliably and smoothly rotated in the directions of arrows a and b while sequentially engaging and meshing with the gear 27 and the second engaged concave portion 28. It is possible to perform a smooth opening and closing operation.
[0111]
Further, in the disk drive device 61, even if there is some variation in the component dimensions, the inner rotor 4 can be accurately moved in the non-slip state in the directions of the arrows a and b by the slide drive of the rack member 71 in the directions of the arrows e and f. In addition, it is possible to reliably and smoothly rotate and open / close the shutters 9 and 10 at all times.
[0112]
【The invention's effect】
As described in detail above, according to the present invention, when the holding member is relatively moved along one side of the case, the first engaged portion of the inner rotor facing the outside from one side of the case The first engaging portion of the rack member, the rack portion, and the second engaging portion are securely engaged with the gear portion and the second engaged portion, respectively, and the inner rotor is rotated. Therefore, the opening and closing operation of the shutter can be performed reliably and smoothly.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the appearance of a disk drive device and an inner rotor type disk cartridge to which the present invention is applied.
FIG. 2 is a perspective view showing a loading mechanism of the disk drive device.
FIG. 3 is a plan view showing an ejection position of a cartridge holder in a loading mechanism.
FIG. 4 is a plan view showing a drawing start position of the cartridge holder in the loading mechanism.
FIG. 5 is a plan view showing a position where the cartridge holder is completely retracted in the loading mechanism.
FIG. 6 is a side view showing an ejection position of a cartridge holder in the loading mechanism.
FIG. 7 is a side view illustrating a position where the cartridge holder is completely pulled in the loading mechanism.
FIG. 8 is a side view showing a loading completion position of the cartridge holder in the loading mechanism.
FIG. 9 is a front view showing an ejection position of a cartridge holder in the loading mechanism.
FIG. 10 is a front view showing a loading position of the cartridge holder in the loading mechanism.
FIG. 11 is a front view for explaining the inclination of the cartridge holder at the start of loading.
FIG. 12 is a front view for explaining the inclination of the cartridge holder at the time of ejection.
FIG. 13 is a plan view showing a driving mechanism in the loading mechanism.
FIG. 14 is a front view showing a driving mechanism in the loading mechanism.
FIG. 15 is a plan view showing an ejection completed state of a Geneva gear mechanism incorporated in the drive mechanism.
FIG. 16 is a plan view showing a completed retracting state of the Geneva gear mechanism.
FIG. 17 is a plan view for explaining a shutter opening operation of the Geneva gear mechanism.
FIG. 18 is a plan view showing a completed loading state of the Geneva gear mechanism.
FIG. 19 is a perspective view illustrating a shutter opening start by a rack member of the loading mechanism.
FIG. 20 is a perspective view for explaining completion of opening of a shutter by a rack member of the loading mechanism.
FIG. 21 is a perspective view for explaining a completed loading state of a rack member of the loading mechanism.
FIG. 22 is an exploded perspective view showing a configuration of a shutter opening / closing mechanism to which the present invention is applied.
FIG. 23 is a sectional view showing a configuration of the shutter opening / closing mechanism.
FIG. 24 is a cross-sectional view showing a state where a first elastic displacement portion of a rack member and a first elastic displacement piece of the elastic member constituting the shutter opening / closing mechanism are bent.
FIG. 25 is a cross-sectional view showing a state in which a second elastic displacement portion of a rack member and a second elastic displacement piece of the elastic member constituting the shutter opening / closing mechanism are bent.
FIG. 26 is a sectional view showing a state in which a third elastic displacement piece of an elastic member constituting the shutter opening / closing mechanism is bent.
FIG. 27 is a perspective view showing the appearance of a disk cartridge and a rack member.
FIG. 28 is a plan view partially cut away showing an initial state for explaining an operation of rotating an inner rotor by a rack member.
FIG. 29 is a plan view showing a partially cut-out state of the rotation driving of the inner rotor from the initial state of FIG. 28;
FIG. 30 is a partially cutaway plan view for explaining the rotation driving operation of the inner rotor continued from FIG. 29;
FIG. 31 is a partially cutaway plan view for explaining the rotation driving operation of the inner rotor continued from FIG. 30;
FIG. 32 is a partially cutaway plan view for explaining the rotation driving operation of the inner rotor continued from FIG. 31;
FIG. 33 is a partially cutaway plan view for explaining the rotation driving operation of the inner rotor continued from FIG. 32;
FIG. 34 is a partially cutaway plan view for explaining the rotation driving operation of the inner rotor continued from FIG. 33.
FIG. 35 is a partially cutaway plan view for illustrating the rotation driving operation of the inner rotor continued from FIG. 34;
FIG. 36 is a partially cutaway plan view for explaining the rotation driving operation of the inner rotor continued from FIG. 35;
FIG. 37 is an exploded perspective view showing the upper and lower shells of the disk cartridge.
FIG. 38 is an exploded perspective view showing an inner rotor, a shutter, and a disk of the disk cartridge.
FIG. 39 is a sectional view of a disk cartridge.
FIG. 40 is a bottom view of the inner rotor.
FIG. 41 is a bottom view showing the shutter insertion state of the pickup insertion hole of the disk cartridge.
FIG. 42 is a bottom view of the pickup insertion hole of the disk cartridge in a shutter open state.
FIG. 43 is a transparent bottom view showing a shutter closed state in which a shutter is driven to open and close by rotation driving of an inner rotor by a rack member.
FIG. 44 is a transparent bottom view for explaining the shutter opening operation of the inner rotor by the rack member continued from FIG. 43;
FIG. 45 is a perspective bottom view for explaining a shutter opening operation by a rack member continued from FIG. 44;
FIG. 46 is a perspective bottom view for explaining a shutter opening operation by a rack member continued from FIG. 45;
FIG. 47 is a perspective bottom view showing a state where the shutter is completely opened by the rack member continued from FIG. 46;
FIG. 48 is a perspective view of a conventional disk cartridge.
[Explanation of symbols]
Reference Signs List 1 disk cartridge, 9, 10 shutter, 61 disk drive device, 64 cartridge holder, 70 shutter opening / closing mechanism, 71 holding member, 72 rack member, 73 elastic member, 73a base, 73b first elastic displacement piece, 73c second Elastic displacement piece, 73d Third elastic displacement piece, 74 rack part, 74a rack, 78 first elastic displacement part, 78a first engagement projection, 79 second elastic displacement part, 79a second engagement Convex part, 126 wide gear, 127 rack

Claims (6)

A disk cartridge having a disk-shaped recording medium, an inner rotor, and a shutter in a case, wherein the inner rotor is rotated so that the shutter opens and closes the opening of the case. A shutter opening / closing mechanism for performing an opening / closing operation,
A holding member that is relatively moved along one side of the case,
A rack portion held by the holding member, a first elastic displacement portion provided with a first engaging portion at a tip end extending along one end of the rack portion along the holding member, and the rack portion A rack member having a second elastic displacement portion provided with a second engagement portion at a tip end extending along the holding member from the other end of the rack member;
A first base disposed between the holding member and the rack member, the first base extending from one end of the base and being bent toward the rack member; A first elastic displacement piece that is in contact with the back side of the elastic displacement portion; An elastic member having a second elastic displacement piece that is in contact with the third elastic displacement piece that is extended from both ends of the base and is bent toward the holding member to be in contact with the holding member; Prepare,
When the holding member is relatively moved along one side surface of the case, a first engaged portion provided on an outer peripheral portion of the inner rotor facing the outside from one side surface of the case, and a gear portion. The first engagement portion, the rack portion, and the second engagement portion are engaged with the second engaged portion, respectively, to rotate the inner rotor. Shutter opening and closing mechanism. In the above-mentioned elastic member, the third elastic displacement piece is provided in a pair from both ends of the base with the first elastic displacement piece and the second elastic displacement piece interposed therebetween. The shutter opening / closing mechanism according to claim 1. 2. The shutter opening / closing mechanism according to claim 1, wherein the first elastic displacement piece and the second elastic displacement piece of the elastic member have a smaller spring constant than the third elastic displacement piece. A disk cartridge having a disk-shaped recording medium, an inner rotor, and a shutter in a case, wherein the shutter opens and closes an opening of the case by rotation of the inner rotor. And / or a disk drive device that performs playback,
A loading mechanism for moving the disk cartridge between a withdrawal position where the cartridge is withdrawn to the outside of the apparatus body and a withdrawal position where the disk cartridge is withdrawn into the apparatus body;
A shutter opening and closing mechanism that opens and closes the shutter by rotating the inner rotor of the disk cartridge that is moved between the drawing position and the drawing position by the loading mechanism.
The shutter opening and closing mechanism is
A holding member that is relatively moved along one side surface of the case with the movement of the disk cartridge by the loading mechanism;
A rack portion held by the holding member, a first elastic displacement portion provided with a first engaging portion at a tip end extending along one end of the rack portion along the holding member, and the rack portion A rack member having a second elastic displacement portion provided with a second engagement portion at a tip end extending along the holding member from the other end of the rack member;
A first base disposed between the holding member and the rack member, the first base extending from one end of the base and being bent toward the rack member; A first elastic displacement piece that is in contact with the back side of the elastic displacement portion; An elastic member having a second elastic displacement piece that is in contact with the third elastic displacement piece that is extended from both ends of the base and is bent toward the holding member to be in contact with the holding member; Prepare,
When the holding member is relatively moved along one side surface of the case, a first engaged portion provided on an outer peripheral portion of the inner rotor facing the outside from one side surface of the case, and a gear portion. The first engagement portion, the rack portion, and the second engagement portion are engaged with the second engaged portion, respectively, to rotate the inner rotor. Disk drive device. In the above-mentioned elastic member, the third elastic displacement piece is provided in a pair from both ends of the base with the first elastic displacement piece and the second elastic displacement piece interposed therebetween. The disk drive device according to claim 4. 5. The disk drive device according to claim 4, wherein the first elastic displacement piece and the second elastic displacement piece of the elastic member have a smaller spring constant than the third elastic displacement piece.

Images