WO2006003938A1

WO2006003938A1 - Shutter opening/closing mechanism and recording medium drive device

Info

Publication number: WO2006003938A1
Application number: PCT/JP2005/011953
Authority: WO
Inventors: Hitoshi Nagata; Yoshimitsu Fukushima; Yuji Morita; Takeshi Kadowaki
Original assignee: Pioneer Corporation
Priority date: 2004-06-30
Filing date: 2005-06-29
Publication date: 2006-01-12
Also published as: JPWO2006003938A1; JP4286865B2

Abstract

A shutter opening/closing mechanism and a recording medium drive device. The mechanism comprises a shutter opener and a driven body engaged with the shutter opener and fitted to a cartridge. The driven body further comprises a wheel (13) in association with a shutter opening and closing a window part. A first recessed part, a gear part, and a second recessed part (13C) are formed in the wheel (13) along the outer peripheral part. The shutter opener further comprises a first projected part engageable with the first recessed part formed on an entrance side, a second projected part (24) formed on a depth side and engageable with the second recessed part (13C), and a rack part meshed with the gear part. The second projected part (24) is energized to a cartridge side, its tip part is formed in a tapered shape, and its tip is positioned on the entrance side of a reference position (MC) which is the center position of a wheel.

Description

Specification

SHOTTER opening / closing mechanism and recording medium driving device

Technical field

TECHNICAL FIELD [0001] The present invention relates to a shatter opening / closing mechanism for opening / closing a window portion and a recording medium driving device provided with the shatter opening / closing mechanism in a cartridge whose center is arranged at a reference position inside a housing. .

Background art

Conventionally, recording media capable of storing large-capacity recording information such as CD (Compact Disc) and MD (Mini Disc) have been used. Furthermore, in recent years, DVD (Digital Versatile Disc) has been developed as a large-capacity recording medium, and research on so-called Blu-ray Disc as a next-generation medium has been rapidly advanced. In addition to bare disks such as CDs, some recording media are used by being stored in cartridges to protect the recording surface.

In this cartridge, a window portion is formed facing the information recording surface of the disc-shaped information recording medium, and this window portion is opened / closed by a shirter opening / closing mechanism.

A conventional structure of a shatter opening / closing mechanism is shown in Patent Document 1.

The shatter opening / closing mechanism of Patent Document 1 includes a shirt taber that is attached to the inside of an outer casing into which a cartridge is also inserted, and a follower that is engaged with the shirt taber and is provided on the cartridge. Prepare.

The schematic structure of this shatter mechanism is shown in FIGS. 1 (A) and 1 (B) when the back surface force of the cartridge 10 is also viewed. In this figure, a follower 11 provided on the cartridge 10 is provided with a wheel 13 which is interlocked with a shirt plate (not shown) and is rotatably arranged inside the cartridge 10. A gear portion 13A is formed along the outer peripheral portion, and a concave portion 13B having an R-shaped outer shape and a concave portion 13C having a rectangular outer shape are formed at two locations on both sides of the gear portion 13A.

[0004] On the other hand, the shirt cornerer 200 provided in the casing is provided on a rack 201 in which a cartridge entrance / exit force is also attached in the depth direction inside the casing (not shown), and on the entrance / exit side of the rack 201. The front side engaging member 202 and the depth side of the rack 201 are provided. The rear side engaging member 203 is provided. The engaging members 202 and 203 have their tip portions formed in a substantially arc shape, and the tip portions of the engaging members are formed on the wheel 13 of the cartridge 10 to be described later! In the recesses 13B and 13C. It is a structure to be engaged.

In the shirter mechanism having the above structure, when the cartridge 10 is inserted in the depth direction R, the front side engaging member 202 is engaged with the recess 13B, and in this state, the cartridge 10 continues to advance in the depth direction A. When the wheel 13 rotates in the counterclockwise direction indicated by the arrow B and the rack 201 and the gear portion 11A are engaged with each other, and the rear side engaging member 203 is engaged with the recess 13C, the shirter (not shown) is released. The

[0005] Patent Document 1: JP 2003-109282 A

Disclosure of the invention

Problems to be solved by the invention

[0006] Patent Document 1 has a structure in which engagement members 202 and 203 having tip portions formed in an arc shape are engaged with planar rectangular recesses 13B and 13C of the wheel. Usually, in order to smoothly engage the concave portions 13B and 13C and the substantially arcuate tip portions of the engaging members 202 and 203, a gap is formed between them. If this gap (backlash) is large, the wheel 13 will rotate by this gap due to external impact or the like.

Here, it is ideal that the center CC of the disk-shaped information recording medium (not shown) housed in the cartridge 10 coincides with the reference position MC of the housing. These are actually due to tolerances and backlash. May not match.

[0007] For example, as shown in FIG. 1 (A), the center CC of the cartridge 10 may be shifted from the reference position MC to the front side (inlet / outlet side, lower side in FIG. 1). As an example, the wheel 13 cannot rotate and the shirt is not fully opened. In this state, there is a possibility that the information recorded on the disc-shaped information recording medium is read or the pickup device for recording information on the recording medium interferes with the shirter. On the other hand, as shown in FIG. 1B, the center CC of the cartridge 10 may be shifted to the rear side (depth side, upper side in FIG. 1) from the reference position MC. As an example, the rear side engaging member 203 also loses the recess 13C force, and the wheel 13 rotates by mistake due to an external impact or the like. [0008] An object of the present invention is to provide a shirter opening / closing mechanism and a recording medium driving device capable of appropriately opening and closing a shirter even if the center of the cartridge does not coincide with the reference position of the casing.

Means for solving the problem

[0009] The shatter opening / closing mechanism of the present invention is a shatter opening / closing mechanism that engages with a wheel provided inside a cartridge inserted from an inlet / outlet and opens / closes the shatter provided on the cartridge. A rack portion that engages with a gear portion formed on the wheel, and is formed on both sides of the rack portion and formed on both sides of the gear portion of the wheel. A first convex portion and a second convex portion that respectively engage with the concave portion and the second concave portion, and at least the second convex portion is biased toward the force cartridge side, and The tip position is arranged on the entrance / exit side with respect to the center position of the wheel when insertion is completed.

[0010] A recording medium driving device according to the present invention is a recording medium driving device provided with the above-described shirter opening / closing mechanism of the present invention, and a disc-shaped information recording medium housed in the cartridge inside the casing. An information recording / reproducing mechanism for recording and Z / reproducing information is attached.

Brief Description of Drawings

FIG. 1 is a cross-sectional view showing a conventional technique.

FIG. 2 is a perspective view showing an embodiment of the present invention.

FIG. 3 is an exploded perspective view of the cartridge.

[Fig. 4] Perspective view of shirt taubna.

FIG. 5 is a plan view showing a main part of the present embodiment and showing an engagement relationship between a second convex part and a second concave part of the wheel.

FIG. 6 is a cross-sectional view showing the operation of the shatter opening / closing mechanism.

Explanation of symbols

[0012] 1 ... Recording medium driving device, 2 ... Housing, 2A ... Entrance / exit, 10 "Cartridge, 10B ... Window, 12 ... Disc information recording medium, 12B ... Window, 13 ... Wheel, 13A ... Gear part, 13B ... 1st recessed part, 13C ... 2nd recessed part, 14 ... Schotter, 20 ... Shirt taber, 22 ... Rack part, 23 ... 1st convex part, 24 ... 2nd convex part

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 shows the overall configuration of a cartridge and a recording medium driving device to which the shirt opening / closing mechanism of this embodiment is applied! / Speak.

In FIG. 2, a recording medium driving device 1 stores information in a casing 2 and a disc-shaped information recording medium 12 (see FIG. 3) housed in a substantially flat cartridge 10 provided inside the casing 2. An information recording / reproducing mechanism configured to include an information recording / reproducing mechanism (not shown) for recording and Z or reproducing is a disk-shaped information recording medium accommodated in the cartridge 10 rotated by a rotation drive unit such as a turntable. This is an apparatus that records and Z or reproduces video and audio while moving the optical pickup in the radial direction with respect to the disk-shaped information recording medium while being driven.

[0014] On the front side of the housing 2, a rectangular doorway 2A is provided for housing the cartridge 10 in the housing 2 or discharging the internal cap. In the present embodiment, the cartridge 10 may be stored directly in the housing 2 or may be stored in the housing 2 while being mounted on a tray (not shown)! /, .

The cartridge 10 is arranged inside the housing 2 so that the center of the disc-shaped information recording medium 12 coincides with the reference position inside the housing 2. That is, the reference position is the center position of the rotation drive unit of the information recording / reproducing mechanism.

Inside the case 1 is attached a shirt taper 20 as a driving body extending in the depth direction from the entrance 2A.

FIG. 3 shows the structure of the cartridge 10.

In FIG. 3, the cartridge 10 includes a lower cartridge main body 10A having an opening formed on the side and an upper cartridge main body (not shown).

The lower cartridge main body 10A is formed with a window portion 10B for accessing the optical pickup extending in the radial direction.

Between these cartridge bodies, a follower 11 that is engaged with a shirt taber 20, and And a disc-shaped information recording medium 12 supported rotatably.

Specifically, the disc-shaped information recording medium 12 in this case includes CD-ROM (Compact Disc-Read Only Memory), CD-DA (CD-Digital Audio), CD-R (CD-Recordable), CD-RW ( CD-Rewritable), Video—CD, CD—G (CD—Extended Graphics), DVD-ROM (Digital Versatile Disc—ROM) ゝ DVD—Video, DVD-Audio, DV D—R, DVD—RW, Blu- Includes ray discs.

[0016] The follower 11 includes two shirts disposed between the wheel 13 and the disc-shaped information recording medium 12 rotatably supported in the cartridge main body, and the wheel 13 and the lower cartridge main body 10A. 14 and an unillustrated interlocking mechanism that interlocks the rotation of the wheel 13 with the opening and closing of the shirt 14.

The window portion 10B of the lower cartridge body 10A exposes a part of the information recording surface of the disc-shaped information recording medium 12 when the shirter 14 is opened.

The wheel 13 includes a gear portion 13A formed along an outer peripheral portion thereof, a first concave portion 13B having an outer shape formed in an R shape on both sides of the gear portion 13A, and a second concave portion 13C formed on a planar rectangle. The gear portion 13A, the first concave portion 13B, and the second concave portion 13C are exposed to the opening force of the side surface portion of the cartridge body depending on the rotational position.

When the shirter 14 is closed, the center of the first recess 13B is the center of the cartridge, the wheel 13 is positioned so as to substantially coincide with the reference position MC shown in FIG. 5, and the shutter 14 is sufficiently opened. In this state, the wheel 13 is positioned so that the center of the second recess 13C is the center of the cartridge and substantially coincides with the reference position MC.

[0017] FIG. 4 shows the structure of the shirt taubna 20! /.

In FIG. 4, a shirt taber 20 includes a substantially long base 21, a rack portion 22 provided along the longitudinal direction of the base 21 and capable of meshing with the gear portion 13A of the wheel 13. A first convex portion 23 as a first engaging member provided on the entrance / exit side of the rack portion 22, and a second convex portion 24 as a second engaging member provided on the depth side of the rack portion 22. It is configured.

The base portion 21 is fixed to the inner side wall of the housing 2 by an appropriate means.

The first convex portion 23 has a tip portion engageable with the first concave portion 13B of the wheel 13, and A spring (not shown) is interposed between the base end portion and the base portion 21 and urged toward the cartridge side.

The front end of the first convex portion 23 is formed in a planar arc shape, and the width dimension thereof is slightly smaller than the width dimension of the first concave portion 13B.

FIG. 5 shows a planar shape of the second convex portion 24.

As shown in FIG. 5 (A), the second convex portion 24 is arranged such that the tip position P thereof is separated from the reference position MC of the disc-shaped information recording medium 12 by the dimension D on the entrance / exit side F. This dimension D is appropriately set in consideration of the backlash tolerance of the cartridge when stored in the recording medium driving device. The second convex portion 24 has a distal end portion engageable with the second concave portion 13C of the wheel 13, and a spring (not shown) is interposed between the base end portion and the base portion 21 so as to cartridge. Being urged towards the side! RU

In the present embodiment, the width dimension of the base end side of the second convex part 24 is formed larger than the width dimension of the second concave part 13C.

In addition, the second convex portion 24 has a tapered shape at least on the F side of the tip portion. In FIG. 5 (A), this taper is formed from the tip to the entrance / exit side (F side) and the depth side ( It is formed on each side of the (R side). The tapered tips are formed at an angle of approximately 45 ° with respect to the center line C passing through the tips. By adopting such a tapered shape, the force for rotating the wheel can be secured stably.

In this state, one corner of the second concave portion 13C comes into contact with the tapered surface on the entrance / exit side of the second convex portion 24, but the other convex portion of the second concave portion 13C contacts the tapered surface on the depth side of the second convex portion 24. Corners do not touch. The taper surface on the depth side is formed so that the taper surface can be retracted when the second convex portion comes into contact with the cartridge housing when the cartridge is unloaded. Therefore, it is not always necessary to form the tapered surface on the depth side as described above, and the side surface on the entrance / exit side is tapered unless it is not necessary to consider the contact with the housing. Moyo! /

Next, the operation of the shirt opening / closing mechanism of the present embodiment will be described with reference to FIG.

6 is a view from the same direction as FIG.

First, the cartridge 10 has a shirt 14 that has been previously closed. The first recess 13B is exposed from the opening, and the first recess 13B is located at the center of the cartridge.

First, as shown in FIG. 6 (A), the cartridge 10 is pushed in the depth direction R from the entrance / exit of the housing. Then, as shown in FIG. 6 (B), the first concave portion 13B of the wheel 13 and the first convex portion 23 of the shirt pivoter 20 are engaged with each other.

[0020] In this state, if the cartridge 10 is continuously pushed in the depth direction R, as shown in FIG. 6 (C), the wheel 13 rotates counterclockwise and the shirter 14 begins to be opened, and the rack 10 22 and the gear portion 13A mesh with each other.

Further, when the cartridge 10 is transported in the depth direction R by a mechanism not shown, the wheel 13 continues to rotate counterclockwise, and the opening degree of the shirt 14 gradually increases, as shown in FIG. 6 (D). As described above, when the second concave portion 13C of the wheel 13 and the second convex portion 24 of the shirt taber 20 are engaged with each other, the shirt tab 14 is maintained in an open state. In this state, the cartridge 10 has the disc-shaped information recording medium 12 exposed from the window portion and is positioned at the reference position MC, and the information recording / reproducing mechanism can be operated.

On the contrary, after the operation of the information recording / reproducing mechanism is finished, when the cartridge 10 is transported to the entrance / exit side by a mechanism (not shown), the wheel 13 engaged with the shirt taber 20 is rotated in the clockwise direction. The shirt 14 is closed.

Here, the cartridge center CC and the reference position MC may not match due to tolerances or the like. For example, as shown in FIG. 5B, the cartridge center CC may be located on the depth side R from the reference position MC. In this case, the second convex portion 24 is displaced in the direction away from the wheel 13 against the urging force toward the cartridge side, and the contact portion with the second concave portion 13C is shifted to the front end side. Engagement with 13C is maintained.

Conversely, as shown in FIG. 5C, the cartridge center CC may be located on the inlet / outlet side F from the reference position MC. In this case, since the second convex portion 24 is arranged on the entrance / exit side by the dimension D, the wheel can be sufficiently rotated and the shirter can be completely opened. In addition, displacement in the direction approaching the wheel 13 causes the contact portion with the second recess 13C to shift to the proximal end side, thereby maintaining the engagement with the second recess 13C.

Therefore, according to the present embodiment, the following effects can be obtained. (1) The shirter opening / closing mechanism is engaged with the shirter-opener 20 as a driving body that is attached to the interior of the housing 2 so as to extend in the depth direction from the entrance / exit side. The follower 11 has a wheel 13 that interlocks with a shirt 14 that opens and closes the window 10B. The wheel 13 has a first recess 13B and a gear along its outer periphery. 13A and a second recess 13C are formed, and the shirt overer 20 is provided with a first protrusion 23 provided on the entrance and exit side and capable of engaging with the first recess 13B, and a second recess provided on the depth side. 13C has a second convex portion 24 that can be engaged with the gear portion 13A, and a rack portion 22 that meshes with the gear portion 13A. The second convex portion 24 is urged toward the cartridge side, and its tip position is It was set as the structure arrange | positioned at the entrance / exit side with respect to the reference | standard position MC. In addition, it is preferable that at least the entrance / exit side of the vicinity of the tip is formed in a tapered shape. Therefore, even if the second convex portion 24 does not match the cartridge center CC and the reference position MC of the housing 2, the second convex portion 24 is engaged with the second concave portion 13C by its tapered surface. Thus, the engagement between the second convex portion 24 and the second concave portion 13C is maintained, and the shirter 14 is appropriately opened and closed.

[0023] (2) The second convex portion 24 is formed from the tip toward the entrance / exit side surface when the tip force is formed toward each of the entrance / exit side surface and the depth side surface. When the cartridge 10 is pushed into the housing 2 from the inlet / outlet 2A, the second concave portion 13C and the second convex portion 24 are more securely engaged with each other by the taper portion, and formed from the tip toward the depth side surface. Due to the tapered portion, the second concave portion 13C and the second convex portion 24 are more reliably engaged when the cartridge 10 is pushed out to the entrance / exit 2A. In addition, since the depth side near the tip is tapered, even when the cartridge housing and the second convex part come into contact with each other during unloading of the cartridge, the housing and the second convex part can be easily slid. .

For this reason, when the cartridge 10 is inserted or ejected by the both tapered portions, it is possible to more reliably engage the shirt tower 20 and the wheel 13 to suppress malfunction of opening and closing of the shirt 14.

(3) Since the taper portion of the second convex portion 24 is formed at a right angle with an angle of approximately 45 ° with respect to the center line passing through the tip, the reference position between the cartridge center CC and the housing 2 Even when the dimensional difference from MC is large, the engagement between the second convex portion 24 and the second concave portion 13C can be maintained and the second convex portion can be maintained. The part 24 force can also increase the force transmitted to the wheel 13.

In other words, if the taper portion of the second convex portion 24 has a small angle, the force transmitted from the second convex portion 24 to the wheel 13 can be increased, but the reference position between the cartridge center CC and the housing 2 can be increased. If the dimensional difference from MC is large, the change of the contact part at the taper part cannot be made large, and the second convex part 24 tends to easily release the second concave part 13C, and conversely, the tapered part of the second convex part 24 When the tip is at a large angle, the second convex part 24 will not release the second concave part 13C even if the dimensional difference between the cartridge center CC and the reference position MC of the housing 2 is large. The force transmitted to the wheel 13 is reduced. Therefore, in order to achieve both effects at the same time, it is preferable to form the tapered portion with an angle of 45 °.

(4) Since the second concave portion 13C of the wheel 13 is formed in a planar rectangular shape, the corner portion on the opening end side thereof can be reliably engaged with the tapered portion of the second convex portion 24. . As a result, the shirt 14 that prevents the wheel 13 from spinning idle can be opened and closed more reliably.

(5) Since the first convex part 23 and the rack part 22 of the shirt taber 20 have the same structure as before, the parts can be made common and the manufacturing cost can be reduced.

(6) In the present embodiment, the recording medium driving device is configured by including the shatter opening / closing mechanism having the above-described configuration, and information is recorded and Z or reproduced on the disk-shaped information recording medium 12 inside the housing 2. Since the information recording / reproducing mechanism is installed, the possibility of the information recording / reproducing mechanism interfering with the shirt 14 is suppressed as the opening / closing of the shirt 14 is more reliably performed. Information can be recorded and reproduced more accurately.

[Modification of Embodiment]

It should be noted that the present invention is not limited to the above-described embodiments, and various changes can be made without departing from the scope of the present invention.

For example, in the present embodiment, the second convex portion 24 is formed with a tapered portion toward the respective side surfaces of the entrance and exit sides and the side surface of the depth side, but in the present invention, the distal end force entrance and exit of the second convex portion 24 is formed. If the taper portion is formed toward the side surface, the depth side may be arcuate.

[0028] In the above embodiment, the tapered portion of the second convex portion 24 has an angle of approximately 45 ° with respect to the center line passing through the tip. However, in the present invention, if the above-described effects can be achieved, The angle Is not limited. For example, it may be in the range of 30 ° to 60 °.

Industrial applicability

INDUSTRIAL APPLICABILITY The present invention can be used as a shatter opening / closing mechanism for opening / closing a window portion and a recording medium driving device provided with this shatter opening / closing mechanism in a cartridge whose center is arranged at a reference position inside the housing.

Claims

The scope of the claims

[1] A shatter opening / closing mechanism that engages with a wheel provided inside a cartridge inserted from an entrance and that opens and closes the shatter provided in the cartridge,

A rack portion formed along a direction in which the cartridge is inserted and engaged with a gear portion formed on the wheel;

A first convex portion and a second convex portion, which are formed on both sides of the rack portion and respectively engage with a first concave portion and a second concave portion formed on both sides of the gear portion of the wheel, respectively. ,

At least the second convex portion is biased toward the cartridge side, and the tip position thereof is disposed on the entrance / exit side with respect to the center position of the wheel at the time of completion of insertion,

A shatter opening and closing mechanism characterized by that.

[2] In the shirt opening / closing mechanism according to claim 1,

The shutter opening / closing mechanism characterized in that the second convex portion is arranged so that the side surface on the entrance / exit side near the tip portion continues to contact the second concave portion even when the opening operation of the shirter is completed.

[3] In the shirt opening / closing mechanism according to claim 1 or 2,

A shirter opening / closing mechanism characterized in that at least the side surface on the entrance / exit side near the tip is formed in a tapered shape.

[4] The shirter opening and closing mechanism according to claim 3, wherein the second convex portion is formed with a tapered portion from a tip thereof toward each of the entrance / exit side surface and the depth side surface. Features a shatter opening and closing mechanism.

[5] The shirter opening and closing mechanism according to claim 3 or 4, wherein the tapered portion is the first tapered portion.

(2) A shatter opening / closing mechanism characterized by being formed at an angle of approximately 45 ° with respect to the center line passing through the tip of the convex portion.

[6] A recording medium driving device comprising the shirt opening / closing mechanism according to any one of claims 1 to 5, wherein a disk-shaped information recording medium housed in the cartridge is provided in the housing. An information recording / reproducing mechanism is attached to record and Z or reproduce information. A recording medium driving device characterized by that.