JPH0714279A - Disk device - Google Patents

Abstract

PURPOSE:To make a caddy-type disk device thin. CONSTITUTION:When a caddy 1 is inserted into an insertion space 17 inside a disk device body 10 and a shutter 4 for the caddy 1 is opened by a shutter- opening mechanism 30, the shutter 4 is opened by the first half S2 of an insertion stroke S1 for the caddy 1. Then, before the shutter 4 for the caddy 1 inserted into the insertion space 17 interferes with a disk table 23, the shutter 4 is already opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc device most suitable for application to, for example, a CD-ROM drive, and more particularly to a disc for recording and / or reproducing such as a CD-ROM in a disc device body by a caddy. The present invention relates to opening a shutter of a caddy in a loading caddy type disc device.

[0002]

The applicant of the present invention is, for example, Japanese Patent Application No.
No. 73182 and the like filed an application for this type of caddy type disk device in advance.

In this prior application example, a caddy accommodating a CD-ROM is manually inserted to a manual insertion position in a holder provided in the main body of the disk device, and then the caddy is automatically inserted to a complete insertion position in the holder. Pull in.

When the caddy is inserted to the insertion completion position, the holder is lowered in parallel to relatively insert the disc table and the optical pickup, which are arranged under the holder, into the caddy from below. The caddy is configured to be positioned by engaging the four caddy positioning pins from above.

In the prior application, a shutter for opening and closing the disc table and the opening for inserting the optical pickup is attached to the bottom of the caddy, and the caddy is inserted into the holder approximately half or more of the entire length of the caddy. The shutter was configured to be opened by the opening mechanism in the latter half of the caddy insertion stroke, which will be described later.

[0006]

Therefore, in the prior application, the shutter of the caddy inserted in the holder is opened while passing over the disc table or the optical pickup, so that the disc table and the optical pickup are shuttered. The disk table and the optical pickup must be lowered sufficiently below the insertion guide so that they do not interfere with the above, which restricts the thinning of the disk device.

The present invention has been made to solve the above problems, and an object thereof is to make it possible to reduce the thickness of a caddy type disk device.

[0008]

DISCLOSURE OF THE INVENTION In order to achieve the above object, a disk device of the present invention is a shutter for accommodating a disk for recording and / or reproducing and for opening and closing an opening for inserting a disk table and a pickup at the bottom. A caddy to which the caddy is attached, an insertion space for the caddy formed in the main body of the disc device, a disc table and a pickup that are arranged at a lower position of the insertion space and are moved up and down relatively to the caddy. In the disc device, a shutter opening mechanism is provided in the disc device main body, which opens the shutter in the first half of the insertion stroke of the caddy inserted into the insertion space.

[0009]

According to the disk device of the present invention constructed as described above, when the caddy is inserted into the insertion space in the disk device main body and the shutter of the caddy is opened by the shutter opening mechanism, the insertion stroke of the caddy. Since the shutter is opened in the first half, the shutter can be already opened before the shutter of the caddy inserted in the insertion space interferes with the disc table or the pickup.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a CD-ROM drive will be described below with reference to the drawings.

First, the caddy 1 will be described with reference to FIG.

The caddy 1 is composed of a rectangular and flat box-shaped case molded of synthetic resin or the like.
A CD-ROM 2 which is a recording and / or reproducing disk is rotatably housed inside the caddy 1. The center hole 2a is provided at the center of the CD-ROM 2.
Are formed.

On the bottom surface 1a of the caddy 1, there is formed a disk table and an optical pickup insertion opening 3 which are formed in the shape of an elongated hole from the central portion to the central portion of the front surface 1b. A shutter 4 formed in a substantially L shape from the bottom surface 1a to the front surface 1b of the caddy 1 is attached along the bottom surface 1a so as to be openable and closable in the directions of arrows a and a '. The shutter 4 is reciprocated in the direction of arrow a'to the reciprocating position shown in FIG. 5 by a built-in shutter spring (not shown).

A disc clamper 5 is mounted inside the upper surface 1c of the caddy 1, and the first and second discs 5 are attached to the left and right side surfaces 1d of the caddy 1 on the front surface 1b side.
A pair of left and right recesses 6 and 7 forming an engaging portion are formed.

Next, the outline of the disk device body 10 will be described with reference to FIGS.

The disk device main body 10 includes a chassis 11 made of synthetic resin or the like, and a top plate 12 made of a stainless plate or the like for closing a part of the upper portion of the chassis 11.
And a pair of upper and lower covers 13 formed of a stainless plate or the like and covering the outer peripheries of the chassis 11 and the top plate 12 are formed in a rectangular and thin box shape.

A horizontally long caddy insertion opening 15 is formed along the upper half of the front panel 14 of the disk device main body 10. An inward opening / closing lid 16 is rotatably attached to the caddy insertion opening 15. Has been.

The chassis 11 has a substantially H-shaped cross section.
It is surrounded by a partition plate 11a which is formed in a mold and is horizontally formed in the upper and lower substantially central portions, vertical left and right side plates 11b formed on the upper part of the partition plate 11a, and a horizontal top plate 12. A horizontal, flat space is formed in the insertion space 17 into which the caddy 1 is inserted horizontally from the direction of arrow b and discharged horizontally in the direction of arrow b '.

The rear end 20a, which is the end in the direction of the arrow b, of the movable frame 20 arranged in the lower part of the insertion space 17 in the disk device body 10 is divided by the horizontal fulcrum shaft 21 into the partition plate 11a of the chassis 11. Up and down arrow c,
It is mounted rotatably in the c'direction.

The spindle motor 2 is attached to the upper portion of the movable frame 20 on the side of the front end 20b which is the end in the direction of the arrow b '.
2 is attached to the rotor 2 of the spin motor 22.
The disk table 23 attached to the upper part of 2a is arranged on the center P of the insertion space 17.

An optical pickup 25, which is a pickup in which the objective lens 24 is arranged on the center P of the insertion space 17 on the arrow b direction side of the disk table 23 of the movable frame 20, is attached.
Is an arrow b by a linear voice coil motor described later,
It is configured to be moved in the b'direction.

An opening 26 for inserting the movable frame 20 is formed in the partition plate 11a of the chassis 11.
The front panel 14 has an eject switch 27.
A volume 28 and the like are provided.

According to this CD-ROM drive, at the time of loading, as shown in FIGS.
The opening / closing lid 16 is pushed open by the front surface 1b of the caddy 1, and the caddy 1 is manually inserted horizontally from the front surface 1b side into the insertion space 17 in the direction of the arrow b.

In order to prevent the shutter 4 of the caddy 1 manually inserted into the insertion space 17 from the direction of the arrow b from interfering with the disc table 2, during the first half stroke S ₂ of the insertion stroke S ₁ , as will be described later. The shutter 4 is opened in the arrow a direction by the shutter opening mechanism, and the opening 3 is opened.

That is, as shown by the solid line in FIG. 1, the position at which the caddy 1 is inserted by a slight distance S ₃ from the caddy insertion port is the opening start position P ₁ , and the position shown by the two-dot chain line is the opening position. It is the end position P ₂ , and the shutter 4 is opened in the direction of arrow a by the insertion stroke S ₄ during this period.

Then, the caddy 1 passes through the opening end position P ₂ and is manually inserted in the direction of the arrow b, but as shown by the dotted line in FIG. _When manually inserted up to ₃ , the loading mechanism described later is driven, and the caddy 1 is automatically pulled in the direction of the arrow b to the insertion completion position P ₄ shown in FIG. The caddy 1 is inserted in the direction of the arrow b while the shutter 4 remains open during the second half stroke S ₅ between the opening end position P ₂ and the insertion completion position P ₄ . Then, the loading mechanism automatically retracts the caddy 1 in the direction of arrow b at the retracting stroke S ₆ between the manual insertion completion position P ₃ and the insertion completion position P ₄ .

When the caddy 1 is pulled to the insertion completion position P _{4 in the} direction of the arrow b and the CD-ROM 2 reaches the center of the disc table 22, the movable frame 20 is moved to the movable frame 20 by the loading mechanism described later. The front end 20b shown in FIG. 3 is rotationally driven in the direction of arrow c about the fulcrum shaft 21 from a lowered position where the front end 20b is inclined downward to a raised position where the front end 20b shown in FIGS.

Then, the disc table 23 and the objective lens 24 of the optical pickup 25 are inserted into the opening 3 of the caddy 1 from below through the opening 26 of the partition plate 11a. Then, the disk table 23 is the CD-ROM 2
The CD-ROM 2 is fitted into the center hole 2a of the CD-ROM from below to be centered and lifted up to the middle of the caddy 1, and at the same time, the CD-RO is moved by the disc clamper 5.
M2 is magnetically chucked on the disk table 23. Then, the objective lens 24 is brought close to the lower surface of the CD-ROM 2 to complete a series of loading operations.

After the loading is completed, the CD-R is integrated with the disk table 23 by the spindle motor 22 according to a command from the host computer or the like.
The OM 2 is rotationally driven in the caddy 1, and the objective lens 24 of the optical pickup 25 is moved by the linear voice coil motor in the radial directions of the CD-ROM 2, that is, in the directions of arrows b and b ′ to record and record the CD-ROM 2. And / or playback is performed.

At the time of ejection, the caddy 1 is automatically moved to the outside of the caddy insertion port 15 in the direction of the arrow b'in the reverse operation of the above operation by turning on the eject switch 27 or by a command from the host computer or the like. Is discharged to.

Next, the shutter opening mechanism 30 will be described with reference to FIGS.

The shutter opening mechanism 30 is disposed in the insertion space 17 and has a shutter opening arm 31 made of synthetic resin or the like. A pair of vertical upper and lower fulcrum shafts 32 are integrally formed on the base portion 31a of the shutter opening arm 31 so as to have the same axis, and a roller 33 is provided at the tip 31b of the shutter opening arm 31.
Is rotatably attached.

A shutter opening arm 31 is horizontally arranged in the insertion space 17, and a pair of upper and lower fulcrum shafts 32 are vertically formed on the partition plate 11a of the chassis 11 and the top plate 12 in the same phase. It is loosely fitted in the pair of guide grooves 34.

The pair of upper and lower guide grooves 34 are a linear path 34a parallel to the directions of arrows b and b'which are the inserting direction and the discharging direction of the caddy 1, and an end portion of the linear path 34b which is a front end of the linear path 34b. And a bent portion 34b bent at a predetermined angle θ ₁ with respect to the directions of the arrows b and b ′.

The shutter opening arm 31 is configured to be rotatable in the insertion space 17 about the pair of upper and lower fulcrum shafts 32 in the forward and backward directions of arrows d and d '.
A pair of upper and lower fulcrum shafts 32 of the shutter opening arm 31
Is movable along the pair of upper and lower guide grooves 34 in the directions of arrows b and b '.

The one end 35a of the torsion spring 35, which is the biasing means, is locked to the shutter opening arm 31, and the other end 35b is locked to the lock arm 41 of the lock mechanism 40. The torsion spring 35 urges the pair of upper and lower fulcrum shafts 32 of the shutter opening arm 31 along the pair of upper and lower guide grooves 34 in the direction of arrow b ', and the shutter opening arm 31 is paired up and down. Fulcrum axis 3
It is urged to rotate in the direction of the arrow d ′ about 2.

The top plate 12 has a pair of upper and lower guide grooves 3.
4, an auxiliary guide groove 36 having a shape similar to that of No. 4 is formed, and the tip end 31b of the shutter opening arm 31 is loosely fitted in the auxiliary guide groove 36.

Next, the operation of the shutter opening mechanism 30 will be described.

First, in the eject state of caddy 1,
As shown by the solid lines in FIGS. 6, 7 and 9, the shutter opening arm 31 is moved back in the direction of the arrow b ′, and the arrow b,
It is moved back to the returning position P ₅ which is inclined at a predetermined angle θ ₂ with respect to the b'direction.

That is, with the torsion spring 35, the pair of upper and lower fulcrum shafts 32 of the shutter opening arm 31 are pushed back to the front ends 34c of the bent portions 34b of the pair of upper and lower guide grooves 34 in the arrow b'direction, and the shutter opening lid is opened. arm 31 is rotated in the arrow d 'direction about the pair of upper and lower pivot shafts 32, by the leading end 31b is brought into contact with the front end 36a of the auxiliary guide groove 36, the shutter open lid arm 31 backward position P ₅ Has been revived.

Next, at the time of loading, the caddy 1 is manually inserted into the insertion space 17 from the direction of the arrow b.
And, as shown by the solid line in FIG. 9, when the caddy 1 is manually inserted to the lid opening start position P ₁ inserted by a short distance S ₃ from the caddy insertion opening 15, the front surface 1b of the caddy 1 is opened by the shutter opening arm. The roller 33 of 31 is abutted from the direction of arrow b.

Then, the caddy 1 is continuously manually inserted in the insertion space 17 in the direction of the arrow b, and the opening end from the opening start position P ₁ shown by the two-dot chain line in FIG. 6 and the one-dot chain line shown in FIG. 9 is completed. By the insertion stroke S ₄ until reaching the position P ₂ , the roller 33 moves the arrow b by the front surface 1 b of the caddy 1.
Pushed in the direction.

Then, during this period, the shutter opening arm 31 is shown by the double-dashed line in FIGS. 6 and 7 from the backward moving position P ₅ shown by the solid line in FIGS. As shown by, the guide groove 34 is rotated by an angle θ _{3 in the} direction of the arrow d against the torsion spring 35 about the pair of upper and lower fulcrum shafts 32 up to the forward intermediate position P ₆ which is substantially perpendicular to the straight path 34a. Then, the shutter 4 of the caddy 1 is opened in the direction of arrow a.

At this time, as shown in FIG. 9, the torsion spring 35
Urging force of the pair of upper and lower fulcrum shafts 32 in the direction of arrow b ', and arrow e acting in the length direction of the shutter opening arm 31.
The pair of upper and lower fulcrum shafts 32 are positioned at the front ends 34c of the pair of upper and lower bent portions 34b by the resultant force of the component force in the arrow f direction generated on the pair of upper and lower fulcrum shafts 32 in the pair of upper and lower bent portions 34b by the pressing force in the direction. In this state, the shutter opening arm 31 is rotated in the direction of arrow d from the forward movement position P ₅ to the forward movement intermediate position P ₆ against the torsion spring 35 about the pair of upper and lower fulcrum shafts 32.

When the shutter opening arm 31 is rotated in the direction of arrow d against the torsion spring 35, the roller 3
3 pushes one side of the front surface 4a of the shutter 4 in the direction of arrow a, the shutter 4 is automatically opened in the direction of arrow a against the shutter spring (not shown), and the opening 3 of the caddy 1 is opened. To be done.

Therefore, as shown by the chain double-dashed line in FIG. 6, when the front surface 1b of the caddy 1 reaches the upper portion of the disc table 23, the shutter 4 has already been released.
3 is displaced in the direction of the arrow a, which is lateral to 3
The shutter 4 does not interfere with the disc table 23.

Then, as shown in FIGS. 6, 7 and 9, when the shutter opening arm 31 is rotated to the forward intermediate position P _{6 in the} direction of the arrow d by the angle θ ₃ , the shutter opening arm 31 moves. The guide groove 34 is substantially perpendicular to the straight path 34a, and the front surface 1b of the caddy 1 is brought into contact with the base portion 31a of the shutter opening arm 31 from the direction of the arrow b, so that the shutter opening arm 31 is in front of the caddy 1. It is almost parallel to 1b.

Then, the caddy 1 is continuously manually inserted to the manual insertion completion position P ₃ in the insertion space 17 in the direction of the arrow b, and then from the manual insertion completion position P ₃ to the insertion completion position by the loading mechanism described later in the arrow b direction. Is automatically drawn into.

Then, as shown in FIGS. 6, 7 and 10, the caddy 1 passes from the opening end position P ₂ to the manual insertion completion position P ₃ to the insertion completion position P ₄ by the stroke S _{5 in the} latter half. When it is inserted in the direction of arrow b, the base 31 of the shutter opening arm 31 is moved by the front surface 1b of the caddy 1.
The a and the tip 31b are simultaneously pushed in the direction of the arrow b.

Therefore, at this time, the pair of upper and lower fulcrum shafts 32 of the shutter opening arm 31 are paired with the upper and lower guide grooves 34.
Is extruded from the inside of the bent portion 34b into the straight path 34a,
A pair of upper and lower fulcrum shafts 32 are arranged along a straight line path 34a and indicated by an arrow b.
The shutter opening arm 3 comes to move in the direction.
While maintaining the posture in which 1 is substantially parallel to the front surface 1b of the caddy 1, the arrow b is shown to the forward movement position P ₇ shown by the one-dot chain line in FIGS. 6 and 7 and the solid line in FIG. 10 against the torsion spring 35. Is translated in the same direction.

Therefore, after the shutter opening arm 31 finishes the opening operation of the shutter 4 at the rotation position P ₆ , the opened state of the shutter 4 is maintained as it is and the shutter opening arm 31 moves in parallel to the forward movement position P _{7 in the} direction of the arrow b. The lid open end position P ₂
The caddy 1 is inserted in the direction of the arrow b with the shutter 4 left open from the insertion position to the insertion completion position P ₄ .

As described above, the opening operation of the shutter 4 at the time of loading is completed.

At the time of ejection, the shutter 4 is closed by the reverse operation of the above operation.

That is, the shutter opening arm 31 is moved forward by the torsion spring 35 until the caddy 1 discharged from the insertion space 17 in the direction of the arrow b'reaches from the insertion completion position P ₄ to the opening end position P _2. From forward position P ₇ to forward intermediate position P
Up to ₆ , the caddy 1 is translated in the direction of the arrow b'while maintaining a posture substantially parallel to the front surface 1b of the caddy 1. Then, during this time, the pair of upper and lower fulcrum shafts 32 move in the direction of the arrow b'in the straight path 34a of the pair of upper and lower guide grooves 34, and then enter the front end 34c of the bent portion 34b.

Then, while the caddy 1 continues to reach the opening start position P ₁ from the opening end position P ₂ , the shutter opening arm 31 is moved forward and backward by the torsion spring 35 about the pair of upper and lower fulcrum shafts 32. The shutter 4 is rotated in the direction of arrow d ′ from P ₆ to the returning position P ₅ , and the shutter 4 is closed in the direction of arrow a ′ by the shutter spring (not shown) during this time.

Next, the lock mechanism 40 will be described with reference to FIGS. 6 and 10.

The lock mechanism 40 has a lock arm 41 formed of synthetic resin or the like, and the lock arm 41 is a partition plate of the chassis 11 at one side of an end portion in the insertion space 17 in the direction of arrow b. It is rotatably mounted on 11a via a fulcrum shaft 42 in the directions of arrows g and g '.
A substantially triangular engagement claw 41a is integrally formed inside the tip of the lock arm 41 in the direction of the arrow b '. The other end 35b of the torsion spring 35 is locked to the lock arm 41, and the torsion spring 35 urges the lock arm 41 to rotate in the direction of arrow g so that the partition plate 1
The stopper 43 is in contact with the stopper 1a. Therefore, the torsion spring 35 is configured as an urging means that also serves as the shutter opening arm 31 and the lock arm 41.

The engaging claw 41a is configured to be freely engageable with and disengageable from the concave portion 7 forming the second engaging portion formed at the end of the side surface 1d of the caddy 1 on the front surface 1b side. ing.

According to this lock mechanism 40, the caddy 1 inserted in the insertion space 17 in the direction of the arrow b from the manual insertion completion position P ₃ to the insertion completion position P ₄ at the time of loading described above is drawn in by a stroke S. _When the CD-ROM 2 reaches the center of the disc table 23 after being pulled in for ₆ minutes, as shown in FIG. 12, the front surface 1b of the caddy 1 is integrally formed with the chassis 4 as a stopper 4.
4, the engaging claw 41a of the lock arm 41 automatically engages with the recess 7 of the one side surface 1d of the caddy 1 to move the caddy 1 to the insertion completion position P ₄ . Lock automatically.

That is, at this time, the lock arm 4 is moved by its own guiding action acting on the engaging claw 41a having a substantially triangular shape.
1 so as to escape once in the direction of the arrow g ′ against the torsion spring 35, so that the engaging claw 41 a is provided on one side surface 1 d of the caddy 1.
After riding on the vehicle, the lock arm 41 is returned by the torsion spring 35 in the direction of the arrow g, so that the engaging claw 41
a is automatically engaged in the recess 7 of the caddy 1.

At the time of ejection, when the caddy 1 is mechanically ejected from the insertion completion position P _{4 in the} direction of the arrow b'by the loading mechanism described later, its guiding action acting on the substantially triangular engaging claw 41a. As a result, the lock arm 41 escapes in the direction of the arrow g ′ against the torsion spring 35, and the engaging claw 41 a is automatically detached from the recess 7 of the caddy 1.

Next, the loading mechanism 50 will be described with reference to FIGS. 1 to 6 and 9 to 24.

First, as shown in FIGS. 11 to 24, the tape loading mechanism 50 has a first loading slider 51 formed of a synthetic resin or the like which is a first loading member. The first loading slider 51 is fitted from above into a groove 52 formed along the other side of the partition plate 11a of the chassis 11 so that the partition plate 1
It is arranged substantially flush with the upper surface of 1a. The first loading slider 51 has an arrow b through a plurality of guide grooves 53 and guide pins 54 in the concave groove 52,
It is mounted slidably in the b'direction.

Then, the loading arm 55 formed of synthetic resin or the like is inserted into the insertion space 17 and the locking arm 4 is inserted.
It is located on the opposite side of 1. The loading arm 55 is rotatably mounted on the end of the first loading slider 51 in the direction of arrow b via a fulcrum shaft 56 in the directions of arrows h and h '. A substantially triangular engaging claw 55a is integrally formed inside the tip of the loading arm 55 in the direction of the arrow b '. Then, the loading arm 55 is rotationally biased in the direction of arrow h by a tension spring 57 which is a biasing means bridged between the loading arm 55 and the first loading slider 51.
Then, the entire first loading slider 51 is urged to move in the direction of arrow b ′ by a tension spring 59 that is bridged between the first loading slider 51 and the chassis 11.

As shown in FIG. 13, a caddy contact piece 51a perpendicular to the arrow b, b'direction is provided at a position near the fulcrum shaft 56 in the arrow b'direction above the first loading slider 51. It is integrally molded. And FIG.
As shown in (A) of FIG. 3 and FIG. 14, in the state where the entire first loading slider 51 is returned to the manual insertion completion position P ₃ by the tension spring 59 in the arrow b ′ direction,
The projection 55b integrally formed on the upper portion of the loading arm 55 on the side of the fulcrum shaft 56 is brought into contact with the stopper 12a formed in a part of the top plate 12 from the direction of the arrow b ', and the loading arm 55 resists the tension spring 57. And is rotated in the direction of arrow h '.

Next, as shown in FIGS. 15 to 18, the loading mechanism 50 includes a second loading slider 6 formed of a synthetic resin or the like, which is a second loading member.
Have one. This second loading slider 61
Is attached to the first loading slider 51 side along the lower portion of the partition plate 11a of the chassis 11 so as to be slidable in the directions of arrows b and b'through a plurality of guide grooves 62 and guide pins 63.

Next, as shown in FIGS. 19 to 24, the loading mechanism 50 includes a loading motor 64 and
The gear train 65 is driven by the loading motor 64.
It has a loading drive mechanism 67 having a cam gear 66 that is driven to rotate forward and backward via the. As shown in FIG. 11, the loading drive mechanism 67 includes first and second loading members at the end of the partition plate 11a of the chassis 11 in the arrow b direction.
It is attached to the upper part of a recess 68 formed on the loading slider 51, 58 side.

The cam gear 66 is formed of synthetic resin or the like, and the first and second cam mechanisms 70 and 75 for driving the first and second loading sliders 51 and 61 with a time lag are formed on the cam gear 66. It is provided.

Then, the first loading slider 51
The first cam mechanism 70 for driving the first cam mechanism 70, which is a protrusion concentric with the cam gear 66 integrally formed on the upper part of the outer periphery of the cam gear 66 via the projecting piece 66a,
A pair of guide rails 72, 73 integrally formed at a lower portion of the end of the loading slider 51 in the direction of the arrow b at right angles to the directions of the arrows b, b ', and these guide rails 7
The first cam 71 is formed between the second cam 73 and the second cam 73, and is formed by a cam driven groove 74 in which the first cam 71 is loosely fitted.

The second cam mechanism 75 for driving the second loading slider 61 has a second cam 76, which is a substantially spiral cam groove formed on the lower surface of the cam gear 66,
The second driven slider 61 is formed by a cam follower pin 77 integrally formed on the upper end of the second loading slider 61 in the direction of the arrow b and loosely fitted in the second cam 76.

The second cam 76 has a small-diameter cam groove 76a formed concentrically on the inner and outer circumferences of the lower surface of the cam gear 66.
A large-diameter cam groove 76b and these cam grooves 76a, 76
It is constituted by a connecting cam groove 76c for connecting between b. The small-diameter cam groove 76a is formed over a range of approximately 180 °, and the small-diameter cam groove 76a is formed at an angle of approximately 60 ° from the connection point of the small-diameter cam groove 76a and the connecting cam groove 76c to the end of the large-diameter cam groove 76b. .

Next, as shown in FIGS. 15 to 18, a motor mounting opening 80 is provided on the front end 20a side of the movable frame 20.
Is formed, and openings 81 and 82 for mounting the carriage of the optical pickup 25 and the linear voice coil motor are formed between the opening 80 and the rear end 20a. And
Spindle motor 22 fixed on motor mounting plate 83
Is inserted into the motor mounting opening 80 from below and is mounted to the movable frame 20 from below by the motor mounting plate 83. The disc table 23 mounted on the upper portion of the rotor 22a of the motor is attached to the center P of the insertion space 17.
It is placed on top.

Further, the carriage 84 to which the objective lens 24 of the optical pickup 25 is attached is inserted into the carriage attaching opening 81 and is movable between the pair of left and right guide shafts 85 in the directions of arrows b and b '. The objective lens 24 is also arranged on the center of the insertion space 17. A linear voice coil motor 86 for driving the carriage 84 in the directions of arrows b and b'is attached in the linear voice coil motor attachment opening 82.

The rear end 20a of the movable frame 20 is provided with the partition plate 1 of the chassis 11 via the pair of left and right fulcrum shafts 21.
It is rotatably attached to a pair of left and right bearings 87 formed in 1a in the vertical directions of arrows c and c '. Then, by the compression spring 89 which is a biasing means vertically interposed between the lower portion of the movable frame 20 on the front end 20b side (for example, the lower surface of the spindle motor 22) and the spring receiver 89 formed on the chassis 11 or the like, The front end 20b side of the movable frame 20 is urged to move about the fulcrum shaft 21 in the upward direction of arrow c.

As shown in FIG. 18, when the front end 20b of the movable frame 20 is rotated in the direction of the arrow c and the movable frame 20 is inserted into the opening 26 of the partition plate 11a of the chassis 11 from below, As shown in FIG. 15, a part 20b 'of the front end 20a of the movable frame 20 is separated by the partition plate 11a.
The movable frame 20 is horizontally positioned by being abutted from below on a stopper 90 integrally formed with the movable frame 20.

On the front end 20b side of the movable frame 20, a cam follower surface 91 is formed on the upper surface on the side opposite to the stopper 90, which is an inclined surface inclined upward by about 45 ° in the direction of arrow b. , This cam driven surface 91 is the second
A compression cam 89 abuts against a third cam 92, which is a substantially triangular projecting piece integrally formed downward at the end of the loading slider 61 in the arrow b ′ direction, from below.

Further, as shown in FIG. 134, a loading switch 94 which is turned on / off by one guide rail 72 on the arrow b'direction side of the first loading slider 51 is horizontally attached to the lower portion of the chassis 11. It is mounted on the printed circuit board 95.

[0078] Further, as shown in FIGS. 14 and 19, the cam gear 66 is a gear train 65 by the loading motor 64 between a forward position P ₁₀ through the backward position P ₈ half rotational position P ₉ Rotation angle θ ₄ + θ of about 105 °
_{In FIG. 5} , it is configured so as to be rotationally driven forward and backward in the directions of arrows i and i ′. A position detector 96 that detects the position of the cam gear 66 and turns the loading motor 64 on and off is mounted on the printed circuit board 95 and a pair of light reflecting surfaces 96 and 97 bonded to the lower surface of the cam gear 68. And a light reflection type optical sensor 98.

Next, the operation of the loading mechanism 50 configured as described above will be described.

First, as shown in FIGS. 11 and 14, when the first loading slider 51 is returned by the tension spring 59 to the manual insertion completion position P _{3 in the} direction of the arrow b ′ and stopped, the first loading slider 51 is stopped. Slider 51
A play 100 is formed between the guide rail 72 on the arrow b ′ direction side and the first cam 71 of the cam gear 66.

Therefore, at the time of loading, the insertion space 1
FIG. 11 shows the caddy 1 manually inserted in the direction of arrow b in FIG.
When the manual insertion completion position P ₃ shown by the solid line is inserted,
As shown in FIG. 13A, the front surface 1 b of the caddy 1 has a caddy contact piece 51 of the first loading slider 51.
The a is abutted from the direction of the arrow b.

Therefore, when the caddy 1 is manually pushed in the direction of arrow b from the manual insertion completion position P ₃ shown by the solid line in FIG. 11 to the loading switch operating position P ₃ ′ for 100 minutes shown in FIG. 14, the caddy 1 shown in FIG. As shown in (B), the caddy abutment piece 51a is pushed in the direction of the arrow b on the front surface 1b of the caddy 1, and the first loading slider 51 pulls the tension spring as shown by the one-dot chain line in FIGS. 11 and 14. 59
It is slid in the direction of the arrow b for 100 minutes against the above play.

Then, as shown in FIG. 13B, the fulcrum shaft 56 on the first loading slider 51 is attached to the top plate 1.
When the loading arm 55 is moved in the direction of the arrow b with respect to the second stopper 12a, the loading arm 55 is pulled.
7 rotates about the fulcrum shaft 56 in the direction of the arrow h, and the engaging claw 55a is automatically engaged in the recess 6 of the caddy 1.

Then, as shown in FIG. 14, the caddy 1
By the first loading slider 5 slid in the direction of arrow b to the loading switch operating position P ₃ ′
Loading switch 9 by the guide rail 72 of No. 1
4 is turned on.

Then, the loading switch 94 is turned on.
Then, as shown in FIG. 19, the loading motor 6
4 is driven to rotate in the forward direction, and the cam gear 66 rotates forward through the gear train 65 from the backward movement position P ₈ to the forward movement position P ₉ in the arrow i direction at a rotation angle of about 105 ° to the forward movement position P _10. Driven.

Then, while the cam gear 66 is positively rotated in the direction of arrow i by a rotation angle θ ₄ of about 180 ° from the backward movement position to the half rotation position P ₉ , as shown in FIGS. The first cam 71 of the cam mechanism 70 rotates in the cam driven groove 74 in the direction of arrow i, and the first cam 71 drives the other guide rail 73 in the direction of arrow b. Then, the first loading slider 51 is moved to the manual insertion completion position P ₃ (actually the loading switch operating position P shown in FIG. 11).
₃ ) to the insertion completion position P ₄ shown by the solid line in FIG. 12, the slide stroke S ₆ shown in FIG. 10 is slid in the direction of the arrow b.

Then, the first loading slider 51
The caddy 1 is automatically retracted by the upper loading arm 55 to the insertion completion position P _{4 in the} direction of arrow b for the retracting stroke S ₆ shown in FIG.

Then, as shown in FIG. 12, the front surface 1b of the caddy 1 which has reached the insertion completion position P ₄ is stopped by the stopper 4.
4 is stopped and the caddy 1 is stopped.
As shown in, the lock arm 41 automatically locks the caddy 1 at the insertion completion position P ₄ .

On the other hand, as shown in FIGS. 20 to 22, the cam gear 66 moves from the backward movement position P ₈ to the half rotation position P ₉ by the arrow i.
The second cam mechanism 7 while rotating in the direction by the rotation angle θ _4.
The cam driven pin 77 of No. 5 is the small diameter cam groove 76 of the second cam 76.
The second cam 76 does not drive the second loading slider 61 at all because it moves relatively in a.

Then, as shown in FIGS. 22 to 24, the cam gear 66 continues to move from the half rotation position P ₉ to the forward movement position P _10.
Although the forward rotation is performed in the arrow i direction by a rotation angle θ ₅ of about 25 °, the forward rotation of the cam gear 66 at the angle θ ₅ is the first rotation.
When the cam 71 has an overstroke, only the second cam mechanism 75 is operated.

That is, as shown in FIGS. 22 and 23, while the cam gear 66 is positively rotated by the rotation angle θ _{5 in the} direction of the arrow i from the half rotation position P ₉ to the forward movement position P ₁₀ , the first cam 7 is rotated.
Since the other guide rail 73 is arranged in a tangential state with respect to the circular rotation locus of the outer peripheral surface 71a concentric with the first cam gear 66, the first cam 71 moves the other guide rail 73 in the direction of the arrow b. There is no drive to.

On the other hand, as shown in FIGS. 23 and 24, while the cam gear 66 is normally rotated from the half rotation position P ₉ to the forward movement position P _{10 in the} direction of the arrow i by the rotation angle θ ₅ , the second cam is rotated. The second cam 76 of the mechanism 75 causes the cam follower pin 77 to move from the inside of the small-diameter cam groove 76a through the connecting cam groove 76c to the large-diameter cam groove 7a.
It is driven so as to be pushed in the direction of arrow b'into 6b.

The cam follower pin 77 and the second
The loading slider 61 moves from the backward movement position P ₁₁ shown in FIGS. 15 and 17 to the forward movement position P ₁₂ shown in FIGS. 16 and 18.
Is slid in the direction of arrow b '.

Then, as shown in FIG. 18, the third cam 9
2 is moved in the direction of the arrow b'with respect to the cam driven surface 91, and the movable frame 20 moves from the lowered position P ₁₃ in which the front end 20b shown in FIG. 17 is inclined downward to the front end 20b shown in FIG.
Is rotated about the fulcrum shaft 21 in the direction of the arrow c by the compression spring 89 by the angle θ ₆ to the ascending position P ₁₄ where it becomes horizontal. The movable frame 20 is the chassis 11
When inserted horizontally from below into the opening 26 of
A part 20b 'of the movable frame 20 is brought into contact with the stopper 90 of the chassis 11 and positioned.・

Then, the movable frame 20 moves to the raised position P ₁₄
Since the disc table 23 and the objective lens 24 of the optical pickup 25 are moved up to the caddy 1
Is inserted from below into the opening 3 of the bottom surface 1a of the CD-R.
The OM 2 is magnetically chucked on the disc table 23 by the disc clamper 5, and the objective lens 24 is brought close to the lower surface of the CD-ROM 2.

As described above, the series of dynamic loading operations are completed, the forward movement position P ₁₀ of the cam gear 66 is detected by the position detector 96, and the loading motor 64 is stopped.

At the time of ejection, the reverse operation of the loading operation described above is performed.

That is, the loading motor 64 is driven in the reverse rotation by turning on the eject switch 27 or a command from the host computer, and the cam gear 66 moves from the forward movement position P ₁₀ to the half rotation position P _9. until returned position P ₈ is rotated in the arrow i 'direction. When the cam gear 66 returns to the backward movement position P ₈ , the position detector 96 detects it and the loading motor 64 is stopped.

Then, the rotation angle θ of the cam gear 66 from the forward movement position P ₁₀ shown in FIG. 23 to the half rotation position P ₉ shown in FIG.
_When only ₅ is rotated in the direction of the arrow i ′, the second cam mechanism 7
4 causes the second loading slider 61 to slide in the direction of arrow b from the forward movement position P ₁₂ shown in FIGS. 16 and 18 to the backward movement position P ₁₁ shown in FIGS. 15 and 17.

At this time, the third cam 92 pushes the cam follower surface 91 downward, and the movable frame 20 compresses from the ascending position P ₁₄ shown in FIG. 18 to the descending position P ₁₃ shown in FIG. 17 about the fulcrum shaft 21. An arrow c ′ is formed at an angle θ ₆ against the spring 89.
Driven to rotate.

Then, the disc table 23 and the objective lens 24 of the optical pickup 25 are mounted on the bottom surface 1 of the caddy 1.
It is separated downward from the opening 3 of a.

Then, the cam gear 66 rotates from the half rotation position P ₉ shown in FIG. 22 to the returning position P ₈ shown in FIG.
When the first loading slider 51 is rotated by _{4 in the} direction of the arrow i ′ by the cooperation of the first cam 71 and the tension spring 59, the first loading slider 51 moves from the insertion completion position P ₄ shown in FIG. 15 to the manual insertion completion shown in FIG. It slides to the position P _{3 in the} direction of the arrow b ′ for the retract stroke S ₆ shown in FIG.

That is, the first loading slider 51, which is constantly urged to move in the direction of the arrow b ′ by the tension spring 59, extends from the insertion completion position P ₄ to the loading switch operating position P ₃ ′, and the arrow i ′ of the first cam 71. It is slid by the rotation in the direction, and from the loading switch operating position P ₃ ′ to the manual insertion completion position P ₃ is slid in the arrow b ′ direction by the tension spring 59.

Then, the first loading slider 51
The front surface 1b of the caddy 1 in the insertion space 17 is pushed by the caddy contact piece 51a, and the caddy 1 is ejected from the insertion completion position P ₄ to the manual insertion completion position P _{3 in the} direction of the arrow b ′.

Then, the first loading slider 51
At the moment when the caddy 1 is forcibly ejected from the insertion completion position P _{4 in the} direction of the arrow b ′, the lock arm 41 resists the torsion spring 35 in the direction of the arrow g ′, as shown by the alternate long and short dash line in FIG. Automatically escapes, and the engaging claw 41a moves to the caddy 1.
It will automatically come off from the recess 7 of.

Then, the first loading slider 51
13B passes through the loading switch operating position P ₃ ′ and reaches the manual insertion completion position P ₃ as shown in FIG. 13B, the protrusion 55 b of the loading arm 55 contacts the stopper 12 a of the top plate 12. After contact, (A) of FIG.
As shown in FIG.
By rotating in the direction of the arrow h ′ against 7, the engaging claw 55a is automatically disengaged from the recess 6 of the caddy 1.

Then, as shown in FIG.
There 'Once discharged in a direction, the end portion of the rear surface 1e side of the caddy 1 arrow b to the outside caddy insertion opening 15 of the disk apparatus main body 10' arrow b until manual insertion completion position P ₃ protrudes direction.

Therefore, the caddy 1 is manually grasped and pulled out to the outside of the caddy 1 insertion port 15 in the direction of the arrow b '. With the pulling of the caddy 1, the shutter 4 is moved to the arrow a'.
The direction is automatically opened.

The CD-R of the present invention constructed as described above
According to the OM drive, there is no need to lower the caddy 1 inserted in the insertion space 17 of the disk device body 10 in parallel. Further, since the shutter 4 of the caddy 1 inserted into the insertion space 17 can be already opened before it interferes with the disc table 23, the disc table 23 for the caddy 1 inserted into the insertion space 17 can be opened. For the reason that the clearance can be made extremely small, it is possible to remarkably promote the thinning of the disk device body 10.

The above is a description of one embodiment of the present invention.
The present invention is not limited to the above embodiments, and various modifications can be made based on the technical idea of the present invention.

[0111]

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

According to a first aspect of the present invention, in a caddy type disc device, when the caddy is inserted into the insertion space of the disc device main body and the shutter of the caddy is opened by the shutter opening mechanism, the insertion stroke of the caddy is By opening the shutter in the first half, it is possible to open the shutter before the shutter of the caddy inserted in the insertion space interferes with the disc table or pickup. The clearance of the disc table and the optical pickup with respect to the caddy inserted therein can be made extremely small, and the thinning of the entire disc device can be remarkably promoted.

According to a second aspect of the invention, since the shutter opening arm is provided by rotating the fulcrum shaft as a center, and then the fulcrum shaft is pushed and moved by the caddy, the shutter opening arm is provided. The shutter opening arm does not hinder the insertion of the caddy later and the caddy can be inserted smoothly.

According to a third aspect of the present invention, a guide groove is formed in the disk device body in parallel with the insertion direction of the caddy, and a guide groove having a bent portion bent at a predetermined angle is formed at an end of the caddy in the discharge direction. Since the fulcrum shaft of the shutter opening arm is loosely fitted in the guide groove, the structure of the shutter opening mechanism is simple.

According to a fourth aspect of the present invention, there is provided a spring for urging the shutter opening arm to rotate in the ejection direction of the caddy about the fulcrum shaft, and a spring for urging the fulcrum shaft in the ejection direction of the caddy. Since it is composed of one torsion spring, the number of parts and assembly man-hours of the shutter opening mechanism are reduced,
Cost reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view taken along the line AA of FIG. 5 illustrating a disk device that is an embodiment of the present invention, showing a loading start state.

FIG. 2 is a sectional side view similar to FIG. 1, showing a loading completed state.

FIG. 3 is a sectional front view taken along the line BB of FIG. 5, showing a loading start state.

FIG. 4 is a sectional front view similar to FIG. 3, showing the loading completed state.

FIG. 5 is a perspective view showing a caddy and a disk device.

FIG. 6 is a plan view illustrating the operation of the shutter opening / closing mechanism.

FIG. 7 is a plan view showing a top plate in the disk device body.

8 is a cross-sectional side view taken along the line CC of FIG.

FIG. 9 is a plan view illustrating a lid opening operation of the shutter at the start of loading.

FIG. 10 is a plan view illustrating a lock operation of the caddy at the end of loading.

FIG. 11 is a plan view showing the engagement operation of the lock arm with the caddy during loading and the first loading slider.

FIG. 12 is a plan view for explaining the automatic retracting operation of the caddy by the lock arm and the first loading slider during loading.

FIG. 13 is a plan view illustrating an engaging operation of the loading arm with respect to the caddy.

FIG. 14D of FIG. 14 illustrating a loading switch
FIG. 6 is a sectional side view taken along the arrow D.

FIG. 15 is a plan view showing a movable frame and a second loading slider.

FIG. 16 is a plan view illustrating driving of a movable frame by a second loading slider.

17 is a side view for explaining the positional relationship between the movable frame and the second loading slider in FIG.

FIG. 18 is a side view for explaining the positional relationship between the movable frame and the second loading slider in FIG.

FIG. 19 is a plan view of a loading drive mechanism.

FIG. 20 is a plan view illustrating the positional relationship between the returning position of the cam gear and the first and second loading sliders.

21 is a cross-sectional side view of FIG.

FIG. 22 is a plan view illustrating the positional relationship between the half rotation position of the cam gear and the first and second loading sliders.

FIG. 23 is a plan view illustrating the positional relationship between the forward movement position of the cam gear and the first and second loading sliders.

FIG. 24 is a sectional side view of FIG. 22.

[Explanation of symbols]

1 Caddy 2 CD-ROM (disc) 3 Opening 4 Shutter 10 Disc Device Main Body 11 Chassis 12 Top Plate 15 Caddy Inserting Port 17 Inserting Space 30 Shutter Opening Mechanism 31 Shutter Opening Arm 31a Shutter Opening Arm Base 31b Shutter Opening Tip of arm 32 Support shaft 33 Roller 34 Guide groove 34a Linear path of guide groove 34b Bent portion of guide groove 35 Torsion spring S ₁ Insertion stroke S _{2 First} half stroke P ₁ Opening start position P ₂ Opening end position

Claims (4)

[Claims] 1. A caddy in which a disc for recording and / or reproducing is stored, and a shutter for opening and closing a disc table and an opening for inserting a pickup is attached to a bottom portion, and an insertion of the caddy formed in a disc device main body. A disc device including a space, a disc table arranged at a lower position of the insertion space and being moved up and down relatively to the caddy, and a pickup provided in the disc device main body and provided in the insertion space. A disk device comprising a shutter opening mechanism for opening the shutter in the first half of the insertion stroke of the caddy to be inserted. 2. The shutter opening mechanism, after opening the shutter by rotating about a fulcrum shaft,
2. The disk device according to claim 1, further comprising a shutter opening arm in which the fulcrum shaft is pushed and moved by the caddy. 3. A guide groove, which is formed parallel to the insertion direction of the caddy and has a bent portion bent at a predetermined angle at the end of the caddy in the discharge direction, is provided in the disk device main body, and the shutter opening is performed. The disk device according to claim 2, wherein a fulcrum shaft of the lid arm is loosely fitted in the guide groove. 4. A spring for urging the shutter opening arm to rotate in the discharge direction of the caddy about the fulcrum shaft.
4. The disk device according to claim 3, wherein the spring for urging the fulcrum shaft to move in the ejection direction of the caddy is constituted by one torsion spring.