JPH08273272A - Disk cartridge and disk loading device - Google Patents

Abstract

PURPOSE: To provide a disk cartridge and a disk loading device to be made compact making possible high-speed changing of disks. CONSTITUTION: In a disk cartridge 9, a locking mechanism for locking pulling out is provided in an inner case having a disk. As an opening mechanism 19 for the inner case, first and second arms 12 and 13 are attached to a base 11 so as to be freely turned and first and second guiding grooves 11a and 11b are formed in the base surface of the base 11. When the second arm 13 is turned in a CCW direction by means of the operation of a turning mechanism part, the first arm 12 is slidden along the first and second guiding grooves 11a and 11b and the inner case is moved to an initial position, a pulling out position or a recording/reproducing position. Then, the disk is chucked on a turntable and information recording/reproducing is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge and a disc loading device in an optical disc recording or reproducing device.

[0002]

2. Description of the Related Art Audio discs and video discs,
An optical disk device is widely used as a data storage device of a computer. The optical disc device has a feature that it is excellent in random accessibility, and has a feature that the tape medium does not have. Therefore, it is widely accepted by users.

On the other hand, when comparing a disk medium and a tape medium in terms of capacity per unit volume, the disk medium has an in-plane or two-dimensional storage area, whereas the tape medium has a structure in which the tape itself is wound. Therefore, the storage area becomes more three-dimensional, that is, three-dimensional. Therefore, in terms of long-time recording / playback, the disk media has a disadvantage over the tape media.

Here, a large number of disc media (hereinafter referred to as "discs") are housed and required discs having both the random access functionality of the disc media and the long-time recording / playback function of the tape media. There is a disc changer device that can record and reproduce by selecting. A disk loading mechanism in a conventional CD changer device will be described as a conventional example with reference to the drawings.

FIG. 24 is a perspective view of a conventional disc changer device having a structure in which a plurality of discs (CDs) are housed in a disc tray and are stacked, showing a portion of a disc loading mechanism. A disc tray 60 accommodating the disc 61 and an opening mechanism 62 for pulling out the disc tray 60 are provided as the main parts of the mechanism.

In the opening mechanism 62, a rack 63 for pulling out or storing the disc tray 60,
A gear 64 for driving the rack 63 in the direction of arrow BB ′, a worm gear 65 for rotationally driving the gear 64, a motor 66 as a rotational drive source for the worm gear 65, and the like are provided. Further, the disc changer device includes a drive 67 in which a spindle motor and an optical pickup are incorporated.
Base 6 which is the chassis of the drive 67 and the entire mechanical section
8. Standing at the corner of base 68, opening mechanism 62
Two guide shafts 69, which serve as shafts for vertically moving (traverse), are respectively provided. Disc tray 6
A hook-shaped projection 60a is provided on the leading edge of 0. A recess 60b that engages with the hook 63a of the rack 63 is formed at the base of the protrusion 60a.

The operation of the disc loading mechanism in the conventional disc changer device thus constructed will be described. The opening mechanism 62 is connected to a traverse movement mechanism (not shown), is movable in the A direction or the A ′ direction so as to slide the two guide shafts 69, and moves to the vicinity of the selected disc. That is, the hook 63a located at one end of the rack 63 passes through the concave portion 60b of the disc tray 60 and is in the A direction or A '.
Move in the direction. In this case, the hook 63a has a recess 60b.
Do not come in contact with. Therefore, the hook 63a is recessed 60
It is necessary to secure a space corresponding to the clearance in the recess 60b so that there is sufficient clearance when it is in the space b.

Next, when the motor 66 is started,
The worm gear 65 rotates in a predetermined direction to move the rack 63 in the B direction via the gear 64. At that time, the hook 63a pushes the protrusion 60a of the disc tray 60 in the B direction and pulls the disc tray 60 toward the opening mechanism 62.

Further, with the opening mechanism 62 holding the disc tray 60, it is moved in the A'direction by the traverse moving mechanism to drive the disc tray 60 in the drive 67.
Get close to right above. At this time, the disc 61 held by the disc tray 60 approaches a turntable (not shown). The turntable is present in the drive 67, and the disc 61 is chucked by this turntable. Eventually, the turntable is rotated by the spindle motor, and the disc 61 is rotated with the disc 61 separated from the disc tray 60. Then, information on the disc 61 is reproduced or recorded on the disc 61 by an optical pickup provided in the drive 67.

[0010]

Disc cartridges suitable for the above-mentioned disc changer device have also been proposed. For example, there is Japanese Patent Application No. 7-27077 “Disc Cartridge” (hereinafter referred to as a prior invention) filed by the applicant of the present application. In the invention of this prior application, the disc cartridge is of a pull-out type, a lock mechanism is provided in the insertion portion on the pull-out side of the middle case, and when recording / reproduction is not performed, the disc is placed in the middle case and securely held in the disc cartridge. This prevents the disc from being scratched or dusted.

Such a disk cartridge did not exist before the application of the prior invention "disk cartridge",
There is no disk loading device for pulling out and storing this disk cartridge. At present, there is the above-mentioned CD changer device as a conventional disk loading device which is most likely to be adapted to this prior invention "disk cartridge". However, it is difficult to apply the conventional disc loading mechanism to the “disc cartridge” of the invention of the prior application. The reason is the following three points.

(1) There is no lock releasing function for taking out the inner case held in the disc cartridge.
The only function is to simply pull out or store the disc tray.

(2) It takes time to change from recording and reproducing one disc to recording and reproducing another disc. The reason is that the following operation is required. a; Return the disc currently being recorded and reproduced and the disc tray to the original position (first traverse movement). b; Move from the aligned row of disc trays to the next disc to be recorded / reproduced (second traverse movement). c; Third traverse movement approaching the drive, that is, three traverse movements are required, which is extremely unsuitable for speeding up disk exchange.

(3) The opening mechanism 62 is the disk 6
1 and the disc tray 60 are pulled out, when the disc tray 60 is not completely pulled out from the aligned row of disc trays, the ejected disc tray and the other disc trays may come into contact with each other to perform the traverse movement. Disappear. In other words, the disc loading mechanism requires a space more than twice the length of the disc tray in the BB 'direction, which is not suitable for downsizing.

The present invention has been made in view of such conventional problems, and prevents the hook for pulling out the middle case from interfering with the disk cartridge while the opening mechanism is moving in the traverse direction. The purpose of this hook is to wait inside the opening mechanism, and when the opening mechanism reaches the desired position of the disk cartridge, the lock mechanism for pulling out the middle case is released so that the middle case can be pulled out.

Further, by mounting an optical pickup or a spindle motor in the opening mechanism, the disc can be exchanged by one traverse movement, the disc can be accessed at high speed, and the middle case is not fully pulled out. An object of the present invention is to realize a small-sized disc cartridge and a disc loading device in which the center hole of the disc is pulled out to a position slightly more than half visible and the spindle motor and the optical pickup can approach the disc to record or reproduce information.

[0017]

In order to solve these problems, the inventions according to claims 1 to 3 of the present application place a disk on the middle case, and the middle case is provided at both corners on the pull-out side of the middle case. The disk loading device is provided with a lock mechanism having a cam structure for stopping pulling out, and moves the middle case to a recording / reproducing position from a state in which the middle case is housed or held so as to be freely drawn. A base having a plate-like structure in which a pair of guide grooves are formed is provided on the drawer side of the middle case, a first arm is provided at a lower portion of the base, and a second arm is rotatably provided at an upper portion of the base. This way, the first
The arm is driven via the rotation mechanism and the second arm, engages with the hook of the middle case, and pulls out the disk to move it to the recording / reproducing position. By moving the base in the stacking direction with respect to the disk cartridge holding the middle case, it is possible to select a disk of an arbitrary disk cartridge and record / reproduce information.

Further, the invention of claims 4 and 5 of the present application embodies the structure of the rotating mechanism part, and the disk cam, the elevating lever and the elevating base are provided on the upper and lower parts of the base. The disc cam is rotatably held on the base so as to be parallel to the second arm, and an arc-shaped second arm drive groove whose rotational radius changes to at least two types is formed on the disc cam. Drive the second arm via. An elevating lever is rotatably held in a direction parallel to the disc cam, and an elevating base drive groove is formed in the bent portion. The lift base is rotatably held by a rotary shaft parallel to the moving direction of the middle case, and the lift pins are engaged with the lift base drive grooves of the lift lever, so that the positioning pins fit into the positioning holes of the middle case. Let In this case, the middle case is restricted to the recording / reproducing position.

Further, according to the invention of claim 6 of the present application, the disk is placed on the middle case, and a lock mechanism having a cam structure for stopping the pulling-out of the middle case is provided at both corners on the side of pulling out the middle case, and the penetration direction is set. Is the thickness direction of the middle case, and a positioning hole having an oval opening cross section is provided in the width direction of the middle case. In this way, the middle case is accurately regulated in the width direction and the drawing direction at the recording / reproducing position.

[0020]

According to a first aspect of the present invention, a disk is placed on an inner case, and a lock mechanism for stopping the withdrawal of the inner case is provided at both corners on the side of the withdrawal of the inner case. A disk loading device for transferring the disk to a reproducing or recording position from a cartridge that holds or draws the cartridge, and is a plate-shaped base located on the drawer side of the cartridge and having a pair of guide grooves. And is rotatably and movably held by the base, and when the inner case is pulled out and moved to the recording / reproducing position, it is engaged with a key-like hook provided at the tip of the inner case to unlock. At the same time, the first arm having a plate-like structure for pulling out the middle case after unlocking and guiding it to the base side, and rotatably held by the base, A second arm having a plate-like structure formed with a pair of drive grooves for engaging the first arm and moving the first arm to a storage position and a recording / reproducing position of the middle case; and the second arm. And a rotation mechanism portion that rotationally drives the storage case and the recording / reproducing position of the middle case.

According to a second aspect of the present invention, the first arm is formed of a plate-shaped member, and a first guide pin erected at one end of the plate-shaped member and a center of the plate-shaped member. A second guide pin that is erected on the other end of the plate member, and a hook pin that is erected on the other end of the plate-shaped member and that engages with the hook of the middle case. A circular hole that serves as a rotary bearing for the second arm, a first guide groove that inserts the first guide pin to regulate the movement direction thereof, and a second guide pin that inserts the first guide groove. A second guide groove that regulates the movement amount and the direction of the first arm in cooperation with the groove, the second arm engaging the first guide pin of the first arm. The first drive groove which is fitted with the second guide pin of the first arm is engaged, and A second drive groove for restricting the movement amount and the direction of the arm of the second arm, the drive groove of the second arm being rotated by the rotation mechanism section. The first arm transfers the middle case to the storage position or the recording / reproducing position via the first and second guide pins.

According to a third aspect of the present invention, the first arm is formed of a plate-shaped member, and is erected on the base-side surface of one end of the plate-shaped member. A first guide pin, a second guide pin erected on the base-side surface of the central portion of the plate-shaped member, and a second guide pin erected on the surface of the other end of the plate-shaped member farther from the base. And a hook pin that engages with the hook of the middle case, wherein the base is formed of a member having a base surface parallel to the pull-out surface of the middle case. A circular hole provided at one edge of the second arm to serve as a rotary bearing of the second arm, and a starting point D1 along the edge of the base surface on the entry side of the middle case. Point D2 on the circular arc a with radius ra around the circular hole Draw from the point D1 toward the point D2,
A point P is set between the circular hole and the starting point D1, and an arc b having a radius rb centered on the point P is drawn from the point D2.
A first guide groove for connecting the first guide pin to regulate the moving direction of the first guide pin, and a groove provided outside the first guide groove when viewed from the circular hole. , The arc a is translated to the center side of the base surface so that the tangential direction of the midpoint of the arc a is substantially parallel to the width direction of the cartridge, and the arc c is drawn.
A groove formed by drawing an arc d of (> rb) and connecting the arc c and the arc d, wherein the second guide pin is inserted to cooperate with the first guide groove to form the second guide pin. A second guide groove for restricting a moving direction of the arm is provided, and the second arm has a rotation shaft formed in a part of the plate-shaped member and a radius ra about the rotation shaft. A groove formed by drawing an arc e having the same radius re, drawing a curve f in a direction approaching the rotation axis from the end point of the arc e, and connecting the arc e and the curve f to each other. The first drive groove that engages with the first guide pin, and the first drive groove that is substantially parallel to the curve f and is linearly cut in the end point direction of the arc e, engages with the second guide pin of the first arm. , The first
A drive pin that is provided between the rotary shaft and the end of the second drive groove, the second drive groove restricting the movement amount and direction of the arm of the rotary mechanism. When the second arm is rotated by the portion via the drive pin, each drive groove of the second arm is engaged with the first and second guide pins to rotate the first arm. The hook pin of the first arm is engaged with the key-like hook of the middle case in the initial position to unlock the middle case, and then the first arm moves the middle case. It is characterized in that the medium case is pulled out, and further, the middle case is moved to a recording / reproducing position.

With this structure, the rotation mechanism rotates the second arm via the drive pin,
The drive grooves of the second arm are engaged with the first and second guide pins to rotate the first arm. The lock pin of the middle case is released by engaging the hook pin of the first arm with the key-like hook of the middle case in the initial position. Then, the first arm can pull out the middle case and further move the middle case to the recording / reproducing position.

According to a fourth aspect of the present invention, the rotating mechanism portion is rotatably held by the base so as to be parallel to the second arm, and has a circular arc shape in which the radius of rotation changes into at least two types. A disc cam that has a second arm drive groove formed with a groove, and drives the second arm via the second arm drive groove, and is rotatably held in a direction parallel to the disc cam. And a lift lever having a lift base drive groove formed in the bent portion, and a rotary shaft parallel to the moving direction of the middle case, and is rotatably held around the rotary shaft, and An elevating base having an elevating pin that engages with the elevating base drive groove.

According to a fifth aspect of the present invention, the disk cam is a disk-shaped member, and has an arc of radius r1, an arc of radius rθ (r1≤rθ≤r2), and a radius r2 from the axis of rotation. A second arm drive groove that is cut out so as to connect an arc, and an elevating lever drive pin that is provided upright on the outer peripheral portion of the disc and that abuts the edge of the elevating lever when the disc cam rotates.
The elevating lever is a member in which a horizontal plate and a vertical plate are integrally formed, and a rotary shaft that is erected on the horizontal plate and a notch in a vertical shape on the vertical plate. He
An elevating base drive groove that engages with an elevating pin of the elevating base, and one end of a return spring connected to the base,
A hole for receiving a rotational biasing force from the return spring, and the elevating base is a member in which a horizontal plate and left and right side plates are integrally formed, and one side plate is provided with the rotating shaft. An elevating pin that is erected in the same direction and that engages with the elevating base drive groove of the elevating lever, and an erection pin that is erected on one side plate in the same direction as the rotation axis of the disc cam and that engages with the positioning hole of the middle case Positioning pin and a mount for the spindle motor of the disk, wherein the second arm drive pin is the radius r of the second arm drive groove.
When the second arm and the first arm are positioned at a position for accommodating the middle case, the lifting base is tilted downward with respect to the base, The second arm and the first arm are positioned at a position where the middle case is pulled out when they are in the radius rθ portion of the drive groove, and when they are in the radius r2 portion of the second arm drive groove, The second arm and the first arm are positioned at a recording / reproducing location of the middle case, and the elevating base is tilted upward with respect to the base.

With this configuration, when the second arm drive pin is located at the radius r1 of the second arm drive groove, the second arm and the first arm are positioned at the place where the middle case is stored. . Then, the elevating base is tilted downward with respect to the base. When the second arm drive pin is located at the radius rθ of the second arm drive groove,
The first arm and the first arm are positioned at the place where the middle case is pulled out, and when the second arm drive groove is located at the radius r2, the second arm and the first arm are set to the place where the middle case is recorded and reproduced. Position it. Further, the elevation base is tilted upward with respect to the base so that information on the disc can be recorded or reproduced.

According to a sixth aspect of the present invention, there is provided a disk cartridge having a middle case on which a disk is placed, and an upper case and a lower case for holding the middle case so that the middle case can be stored or drawn out. Formed on a pair of lock mechanisms of a cam structure which is provided at both corners on the side and which stops the withdrawal of the middle case, and a part of the middle case located between the pair of lock mechanisms, and the penetrating direction of the middle case. And a positioning hole having an oval opening cross section in the width direction of the middle case in the thickness direction.

According to a seventh aspect of the present invention, there is provided a middle case on which a disc is placed and a positioning hole having an oval-shaped opening cross section in the width direction is formed, and the middle case is held so as to be retractable or retractable. A disk loading device for transferring the disk to a reproducing or recording position from a disk cartridge including a case and a lower case,
The positioning pin of the elevating base has a tapered portion formed at its tip, and when fitted to the positioning hole of the middle case, the middle case is restricted to a recording / reproducing position. .

With this structure, the positioning pin is
When fitted in the positioning hole of the middle case, the middle case can be reliably regulated to the recording / reproducing position, and even if external vibration occurs, the position of the disk read head with respect to the middle case does not shift.

(Embodiment 1) A disk cartridge according to an embodiment of the present invention will be described with reference to the drawings. 2 and 3 are exploded perspective views showing the structure of the disk cartridge of this embodiment. 4 and 5 are external perspective views of the disc cartridge. FIG. 4 is a perspective view showing a state where the optical disc held in the middle case is stored, and FIG. 5 is a perspective view showing a state where the middle case is pulled out.

In FIGS. 2 and 3, a disc cartridge is constructed by including an optical disc (hereinafter referred to as a disc) 1, a lower case 2, an upper case 3, an intermediate case 4, a lock cam 5, and a release lever 6. The middle case 4 accommodates the disk 1 and slides in a gap formed by bonding the upper case 3 and the lower case 2. Each part of the middle case 4 is configured so that the disk 1 can be pulled out more than half for use. Further, a lock cam 5 and a release lever 6 are provided as a lock mechanism for stopping the withdrawal so that the middle case 4 holding the disc 1 is not accidentally pulled out.

Next, the structure of each part of the disk cartridge will be specifically described. As shown in FIGS. 2 and 3, the disk 1 is housed in the middle case 4. At both corners on the pull-out side of the middle case 4, notches 4c are provided which are notched inward in a U shape at right angles to the sliding direction. Then, a flat portion 4d that is slightly stepped down is formed in the rearward direction (B 'direction) from each notch 4c, and a cylindrical cam column 4e is erected on each flat portion 4d near the sliding surface of the middle case 4. . Also, at the edge of the middle case 4 sandwiched by the left and right cutouts 4c,
It is provided so as to penetrate the oval positioning hole 4m. As shown in FIG. 3, the outside of the U-shaped notch 4c (direction B)
Is an L-shaped hook 4l, and the front side surface of the notch 4c is an inclined portion 4j.

6 and 7 show the upper case 2 and the lower case 3.
Figure 7 (a) shows an enlarged view of the drawer side (doorway)
Is a plan sectional view, and FIG. 7B is an external side view. 6 and 7, a release hole 6b is provided on the sliding side surface near the drawer side of the upper case 2 and the lower case 3 by notching the edge on the sliding side. The release hole 6b is formed by notching a part of the left and right edges (CC direction) of the lower case 2 and a part of the left and right edges 3j of the upper case 3 in the same position in a stepped shape. is there.

A flat surface portion 2b is formed in a portion of the lower case 2 which becomes the release hole 6b, and a release lever support pillar 2c is erected on the flat surface portion 2b. Then, a groove 2d is provided along the side surface of the edge of each of the lower case 2 and the upper case 3 on the drawer side from the portion where the release lever support 2c is present. The groove 2d constitutes a part of the lock release mechanism and serves as a groove in which a guide piece 8 described later slides. As shown in FIGS. 3 and 7, the release lever 6 has a hole 6a that fits in the release lever support 2c, and is rotatably supported in the release hole 6b. The lock cam 5 shown in each of FIGS. 3, 5, and 7 is formed by integrally forming a leaf spring portion 5a having an elastic force and a cam portion 5b that abuts or avoids other members, and has a hole 5e. Through cam strut 4
It is rotatably held by e.

As shown in FIG. 4, when the middle case 4 is housed in the cartridge, the elastic force of the leaf spring portion 5a of the lock cam 5 causes a part of the cam portion 5b to move into the middle case 4.
Of the upper case 3 and the lower case 2 and is locked. There are two methods for releasing this locked state. One is a method of releasing the lock by inserting the pin 7 into the notch 4c of the middle case 4 as shown in FIG. 7, pushing the lock cam 5 in the B'direction and rotating it in the CCW direction.

Another method is to insert the guide piece 8 along the groove 2d from the end surface of the middle case 4 on the drawer side to the lock release mechanism as shown in FIG. 7 (a).
The release lever 6 is pressed. Then, release lever 6 with CCW
Then, the lock cam 5 is also rotated in the same direction and released. Normally, the guide piece 8 is fixed to the drive side, and the middle case 4 is guided by the guide piece 8 and mounted on the drive side.

(Embodiment 2) A disk loading device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing the overall structure of the disk loading device of this embodiment. In the figure, the disc loading device is configured to include a base 11, a first arm 12, a second arm 13, a base 14, and a guide shaft 15 as main components. In addition, a schematic diagram of a disk cartridge 9 described later is shown by a chain double-dashed line,
The direction in which the middle case 4 is pulled out is the B direction.

The base 14 is a base for fixing the base 11,
The first bearing 14a and the second bearing 14b are integrally formed at both ends thereof. The first bearing 14a is a cylindrical bearing provided on the C side, the second bearing 14b is provided on the C'side, and the bearing cross section is a U-shaped bearing. The platform 14 is moved so that it can move in the traverse direction (direction A or direction A ').
It is slidably held by the first guide shaft 15a and the second guide shaft 15b via the bearing 14a and the second bearing 14b.

Here, the base 11, the first arm 12 and the second arm 13 constitute an opening mechanism 19 of the disc cartridge. Then, the middle case 4 is pulled out into the opening mechanism 19 only during reproduction or recording.
Although not shown, the opening mechanism 19 incorporates a spindle motor and an optical pickup. Further, the opening mechanism 19 is connected to a traverse moving means (not shown) and can move in the traverse direction (AA 'direction).

Here, the structure of the disc loading device will be described in detail for each part. In FIG. 1, the first arm 12 is an elongated plate-shaped member and is rotatably provided on the lower surface of the upper plate of the base 11. The upper surface of the first arm 12 has a first
The guide pin 12a and the second guide pin 12b are installed upright. Further, hook pins 12c are erected on the lower end portion.
At the time of recording / reproducing, the first arm 12 unlocks the disk cartridge 9 of the middle case 4, pulls out the middle case 4 to the opening mechanism 19 side, and when the recording / reproducing operation is completed, the middle case 4 is B ′. It works by pressing it in the direction and storing it in the disk cartridge 9.

A circular hole 11c is provided on the left side (C 'direction) of the upper plate of the base 11. The circular hole 11c is a hole for rotatably holding the rotating shaft 13c of the second arm 13. Also, a starting point D1 is taken in the B'direction as viewed from the circular hole 11c, and this starting point D1
From point 1, an arc a with radius ra centered on circular hole 11c is point D
Draw over 2. A point P is set between the circular hole 11c and the point D1, and an arc b having a radius rb is drawn with the point P as the center. The arc a and the arc b are cut out with the center line as the center line, and this groove is used as the first guide groove 11a. The first guide groove 11a functions to insert the first guide pin 12a of the first arm 12 and regulate the moving direction of the first arm 12.

Further, a second guide groove 11b is provided outside the first guide groove 11a when viewed from the circular hole 11c. An arc c is obtained by moving the entire arc a substantially parallel to the C direction (width direction of the cartridge). Furthermore, the radius rd with the point P as the center
Draw an arc d of (> rb) and connect arc c and arc d.
A notch groove having the arcs c and d as the center lines is provided, and this is used as the second guide groove 11b. Second guide groove 1
Reference numeral 1b serves to insert the first guide pin 12b of the first arm 12 and regulate the moving direction of the first arm 12 together with the first guide groove 11a.

The second arm 13 is a flat plate-like member provided on the upper side of the base surface which is the upper plate of the base 11. The second arm 13 engages with a rotation mechanism section (disc cam or the like) described later, and the second arm 13 itself rotates,
The position and the direction of the first arm 12 are controlled. The second arm 13 is provided with a rotary shaft 13c standing downward, and rotates about the rotary shaft 3c. The second arm 13 has a first drive groove 13 a and a second drive groove 13 a.
b are formed.

The first drive groove 13a is a cutout groove having an arc e and a curve f as its center line. Arc e is the rotation axis 13
It is an arc of radius re (= ra) centered on c, and base 1
1 is drawn from the starting point E in the same direction as the circular arc a of FIG. 1, and the curve f is drawn from the end point of the circular arc e toward the rotating shaft 13c and to the line segment connecting the rotating shaft 13c and the point E. It was the one. The first drive groove 13a is a groove into which the first guide pin 12a of the first arm 12 is slidably inserted.

The second drive groove 13b is substantially parallel to the curve f,
Further, it is a groove cut out with a straight line g that is a constant distance from the end point side of the arc e as the center line. The second drive groove 13b is for slidably inserting the second guide pin 12b of the first arm 12.

As shown in FIG. 1, the first guide groove 11a,
The second guide groove 11b has its concave side directed to the circular hole 11c. The arc b of the first guide groove 11a and the arc d of the second guide groove 11b are loci that are substantially parallel to the BB 'direction. When the opening mechanism 19 is assembled, the second arm 13 is provided above the base surface of the base 11.
And the first arm 12 is arranged below the base surface of the base 11. At this time, the rotary shaft 1 of the second arm 13
3c is inserted into the circular hole 11c of the base 11. And the first
The first guide pin 12a of the arm 12 is passed through the first guide groove 11a and the first drive groove 13a. Further, the second guide pin 12b is passed through the second guide groove 11b and the second drive groove 13b. In this way, the first arm 12 and the second arm 13 are connected to the base surface of the base 11 and rotatably held.

With such a structure, the first arm 12 is moved to a predetermined position by rotating the second arm 13 around the rotating shaft 13c by the rotating mechanism section described later, and Position the first arm 1 in the desired direction
2 can be directed.

Next, the operation of the disk loading device (excluding the rotating mechanism) shown in FIG. 1 will be described with reference to FIGS.
Will be explained. FIG. 8 is a view showing a state in which the first arm 12 is housed in the opening mechanism 19 and the inner case 4 on which the disk 1 is placed is not pulled out from the cartridge 9. Here, it is assumed that the rotation mechanism unit rotates the second arm 13 in the CCW direction until the second arm 13 reaches the initial state. At this time, the first guide pin 12a and the second guide pin 12b are guided by the first guide groove 11a and the second guide groove 11b, respectively, and the second arm 13 is pulled toward the C'side. In this state, the first guide pin 12
Since the a and the second guide pin 12b are positioned substantially parallel to the CC ′ direction, even if the hook pin 12c is close to the front edge of the disk cartridge 9, the hook 4l shown in FIG. It is in a slightly retracted state.

In such a state, the opening mechanism 19
Can move in the traverse direction, and the first arm 12 is housed in the opening mechanism 19 in the middle thereof.
Therefore, the problem that the first arm 12 collides with the disc cartridge 9 is eliminated.

Next, when the rotation mechanism portion operates from the state of FIG. 8 and the second arm 13 rotates in the CW direction, the state shown in FIG. 9 is obtained. That is, the second drive groove 13 b of the second arm 13 is formed by the second guide pin 12 of the first arm 12.
Since b is pushed in the C direction, the first guide pin 12a and the second guide pin 12a
The guide pin 12b is guided by the first guide groove 11a and the second guide groove 11b, and slides toward the ends of the arcs a and c, respectively. At this time, the first drive groove 13a of the second arm 13 does not press the first guide pin 12a of the first arm 12. That is, it does not hinder the movement trajectory of the first guide pin 12a.

In this case, the hook pin 12c provided at the tip of the first arm 12 draws an arc-shaped locus and is C-shaped.
And B ′ in the middle direction, and eventually gets caught by the hook 4l of the middle case 4 housed in the disk cartridge 9. At this time, as described with reference to FIG. 7, the pin 7 (hook pin 12c in FIG. 9) is inserted into the U-shaped notch 4c of the middle case 4, and the lock cam 5 is pushed to cause CC.
Rotate in the W direction to unlock the middle case 4.

The disk cartridge 9 has another lock releasing mechanism. The unlocking method is, as shown in FIG. 7, from the end surface of the middle case 4 on the drawer side to the release hole 6b.
The release lever 6 is pushed by inserting the guide piece 8 shown by the chain double-dashed line into the groove 2d formed up to the portion. Then, the lock cam 5 is rotated in the CCW direction to release the lock. In FIG. 9, when the disc cartridge 9 is slid in the direction B and installed at the position of FIG. 8, the guide piece 8 (not shown) unlocks one side of the disc cartridge 9.

When the second arm 13 is further rotated in the CW direction from the state shown in FIG. 9, the state shown in FIG. 10 is obtained. That is, the portion of the curve f of the groove 13a of the second arm 13 pushes the first guide pin 12a in the B direction, and the groove 13b
The portion of the straight line g of (1) pushes the second guide pin 12b of the first arm 12 in the B direction. Therefore, the first guide pin 12
a and the second guide pin 12b are respectively guided by the arc b of the first guide groove 11a and the arc d of the second guide groove 11b provided on the base 11, and the entire first arm 12 moves in the B direction. To do. Hook 1 at the tip of the first arm 12
The locus of 2c has an arc shape, and when looking at FIG. 9 and FIG. 10 together, the locus of the hook 12c of the first arm 12 is 2
It can be seen that one operation is performed continuously. At this time, the posture of the first arm 12 is the same as that of the first guide groove 11a and the second guide groove 11a.
The guide pins 11c are regulated by their respective B-side end positions of the guide grooves 11b, and the hook pin 12c is rotated in the B direction largely as compared with the moving amount of the central portion of the first arm 12 as shown in FIG. I understand. Therefore, the middle case 4 can be efficiently guided to the back of the opening mechanism 19.

At the time when the state shown in FIG. 10 is reached, the turntable existing in the opening mechanism 19 becomes the disc 1
To chuck. Then, the spindle motor rotates, and the optical pickup reproduces information from the disc 1 or records information. In addition, the disc 1 which has been reproduced or recorded
Are unloaded in the reverse order of the loading operation described above.

(Third Embodiment) Next, a rotating mechanism portion of a disk loading device will be described as a third embodiment of the present invention with reference to the drawings. The above description of the operation of the disk loading device is for explaining how the middle case 4 is pulled out by the rotation of the second arm 13 (principle of the opening mechanism). In addition to this, the specific structure and operating method of the rotating mechanism section related to the opening operation will be described here, and together with this operation, the operation of raising and lowering the elevating base equipped with an optical pickup and a spindle motor will be described. Explain while linking.

11 and 12 are exploded perspective views showing the structure of the rotating mechanism section. Of these, FIG. 11 shows the disc cam 20,
FIG. 12 is a perspective view of the elevating lever 21 and the second arm 13, and FIG. 12 is a perspective view of the base 11 and the elevating base 22. Further, FIG. 13 is an assembly diagram showing the structure of the rotating mechanism section.
Although the basic parts of the base 11 and the second arm 13 shown in FIG. 11 and subsequent figures are the same as those described above, the second arm 13 shown in FIG. The drive pin 13d is erected. The standing position is between the rotary shaft 13c and the second drive groove 13b.

The disc cam 20 shown in FIGS. 11 and 13 is
It is provided on the upper surface side of the second arm 13 so as to be rotatable around the rotary shaft 20a, and a gear or the like (not shown) is provided on the outer peripheral portion thereof.
By forming a gear and driving its gear with a motor,
It is designed to rotate in a predetermined direction by a specified angle. A second arm drive groove 20b is formed in the disc cam 20. The second arm drive groove 20b has a radius r around the rotary shaft 20a.
1 arc and radius rθ (r1 ≦ rθ ≦ r2 and a value that changes according to the rotation angle), and radius r2 (> r1)
And a curve connecting the three arcs is defined as a center line, and the cam groove is cut out along the center line. The second arm drive groove 20b engages with the second arm drive pin 13d of the second arm 13 and functions to rotate the second arm 13 to the position described above when the disc cam 20 rotates. .

Next, the elevating lever drive pin 20c is erected on a specific outer peripheral portion of the disc cam 20. Lifting lever drive pin 2
Reference numeral 0c is a member that presses the elevating lever 21 in the CCW direction by coming into contact with the edge of the elevating lever 21 when the disc cam 20 rotates in the CCW direction. The lift lever 21 shown in FIG. 11 and FIG.
It is a member that is located on the upper side of 0, is formed so that the side surface portion straddles the outer peripheral portion of the disc cam 20, and is rotatably held around the rotation shaft 21a. The elevating lever 21 has an elevating base drive groove 21b formed on a side surface portion obtained by bending the flat plate portion of the base 1 downward. The elevating base drive groove 21b is formed by the elevating lever 21.
The groove parallel to the rotation plane and the groove away from the rotation plane are connected.

As shown in FIG. 12, a rotating shaft is provided on the lower surface side of the base 11 in the moving direction of the middle case 4 (direction BB '), and swings vertically around the rotating shaft. An elevating base 22 is provided. The elevating base 22 has a flat plate and a structure in which the left and right sides thereof are bent upward, and holes 22a are provided in the left and right side surfaces thereof, respectively. As shown in FIG. 13, the hole 22a is a shaft hole 11d provided on the front side of the base 11 and on the rear side thereof.
And is used as a rotation axis for swinging motion (tilt). An elevating pin 22c is horizontally provided on the front side surface of the elevating base 22 shown in FIG. As shown in FIG. 13, the elevating pin 22c is engaged with the elevating base drive groove 21b of the elevating lever 21, and the elevating lever 21 has its rotating shaft 21a.
By rotating around, the elevating base 22 functions to move closer to or farther from the upper surface of the base 11.

As shown in FIG. 12, a spindle motor mounting base 22b is formed on a part of the flat plate portion of the elevating base 22. And install a spindle motor in this part,
Attach the optical pickup to the other part of the flat plate. In addition, a part of the front side surface of the elevating base 22 is bent in the horizontal direction, and the positioning pin 22d is attached to the tip end thereof in the upward direction. The positioning pin 22d has a positioning hole 4m shown in FIG. 3 when the middle case 4 is loaded at the recording / reproducing position.
It is a pin that is inserted into.

As shown in FIGS. 12 and 13, the base 1
A hole 11e is provided at the falling edge of the edge before 1, and one end of the return spring 23 is engaged. As shown in FIGS. 11 and 13, the other end of the return spring 23 is connected to the hole 21 of the elevating lever 21.
Engage with c and apply a biasing force that pulls the elevating lever 21 in the CW direction. The base 11 is provided with the first guide groove 11a and the second guide groove 11b described with reference to FIG.
As shown in FIG. 5, a hole 11c, a circular squeeze 11g, and a track-shaped squeeze 11f are further provided on the upper plate of the base 11.

The operation of the rotating mechanism centering on the disc cam 20 thus configured will be described below. FIG.
4 to 21 are mechanical diagrams showing the operation of pulling out the middle case 4 of the cartridge 9 and the operation of raising and lowering the raising / lowering base 22 in cooperation with each other. 14 and 15 are mechanical views when the rotating mechanism is in the first state (initial state), FIG. 14 is its plan view, and FIG. 15 is a side view. In this state, the second arm drive pin 13d of the second arm 13 causes the disc cam 20 to move.
Is located in a portion of the second arm drive groove 20b of radius r1 of
The second arm 13 is in a stopped state. In this case, as described above, the first arm 12 is stored in the base 11.

The elastic force of the return spring 23 pulls the elevating lever 21 in the CW direction. At this time, since the lift base drive groove 21b is also moving in the CW direction, the lift pins 22c of the lift base 22 are moved to the lift base drive groove 21b.
The lower groove engages. For this reason, the elevating base 22 is displaced in the CCW direction with the two holes 22a as rotation axes, and as shown in FIG. 15, the portion with the positioning pin 22d is inclined downward. That is, the elevating base 22 is at the position farthest from the base 11.

Next, from the first state shown in FIG.
Rotates in the CCW direction, and when the engagement position of the second arm drive pin 13d in the second arm drive groove 20b reaches the point at which the groove having the radius r1 ends, the second state shown in FIGS. 16 and 17 is reached. Become. At this time, the second arm drive pin 1
Since 3d is in the region of the radius r1 of the disc cam 20 as in the first state, the second arm 13 remains stationary as viewed from the base 11.

Next, when the disc cam 20 further rotates in the CCW direction from the state of FIGS. 16 and 17, the second arm 1
3 rotates in the CW direction and enters the third state shown in FIGS. 18 and 19. The reason is that the center of rotation of the disc cam 20 and the second
Has a constant distance between the rotation centers of the arms 13 of the second arm 13 and the rotation center of the second arm 13 and the second arm drive pin 13.
The distance between d is also constant. On the other hand, the disc cam 20
The distance from the rotation center of the second arm drive groove 20b to r2 (constant value) from r1 through rθ. Therefore, as the disc cam 20 rotates in the CCW direction, the position of the second arm drive pin 13d engaged with the second arm drive groove 20b changes. From the cosine theorem in the triangle, the position of the second arm drive pin 13d changes as shown in FIG.
It must move in the B direction from the position shown in 6. As a result, the second arm 13 rotates in the CW direction, and
The state shown in FIG.

The state shown in FIG. 18 shows a state at the moment when the radius of the second arm drive groove 20b engaged with the second arm drive pin 13d changes from rθ to r2. At this time, the lifting lever drive pin 2 provided on the disc cam 20
Since 0c also largely rotates in the CCW direction as shown in the figure, it comes to the position immediately before the elevating lever 21 is pressed.

14 to 17 are the same as FIGS. 8 to 1 described above.
The state (margin) before performing the opening operation of 0 is shown. Since the second arm 13 rotates by changing from the state of FIG. 16 to the state of FIG.
As described above using 0, the first arm 12 can be operated to unlock the middle case 4 with respect to the cartridge 9 and pull out the middle case 4.

Next, when the disc cam 20 is further rotated in the CCW direction from the state shown in FIGS. 18 and 19, the state shown in FIGS.
The fourth state shown in 1 is obtained. At this time, since the radius of the second arm drive groove 20b is a constant value of r2, the second arm 13 remains stationary. However, since the lift lever drive pin 20c rotates by the same amount as the rotation angle of the disc cam 20, the lift lever drive pin 20c presses the edge of the lift lever 21 to rotate the lift lever 21 in the CCW direction. Let

When the elevating lever 21 rotates in the CCW direction, the elevating base drive groove 21b also moves in the same direction, so the elevating pin 22c of the elevating base 22 moves toward the groove above the elevating base driving groove 21b. In this case, when the raising / lowering pin 22c moves upward as shown in FIG. 21, the raising / lowering base 22 rotates in the CW direction when viewed from the side, and its posture becomes parallel to the upper plate of the base 11. In addition, the positioning pin 22d
Also rises and becomes vertical.

22 and 23 are mechanical diagrams showing the fourth state shown in FIGS. 20 and 21 in which the positional relationship among the base 11, the middle case 4 on which the disk 1 is placed, and the elevating base 22 are linked. 22 is a plan view and FIG. 23 is a side view. 7 to 1 between the base 11 and the middle case 4.
Since the first arm 12 moves as indicated by 0, a space larger than the thickness of the first arm 12 is required. Further, for the purpose of determining the position of the moved middle case 4 in the A direction, the squeezers 11f and 11g are provided. As shown in FIGS. 12 and 23, the squeeze 11g is a small recess provided on the C side of the upper plate of the base 11, and the squeeze 11f is a track-shaped recess provided on the C ′ side of the upper plate of the base 11. is there.

As described above, the middle case 4 shown in FIG.
An oval positioning hole 4m is provided which penetrates the edge in the thickness direction. The longitudinal direction of the positioning hole 4m is the CC 'direction. The position at which the drawer of the middle case 4 ends is shown in FIG.
0, FIG. 21, and FIG. 10, the first arm 1
It is determined by the positions of the first and second arms 13 and the disc cam 20. To put it more closely, the structure is determined by the rotational position of the disc cam 20, but in an actual structure, there is always a clearance between each pin and each groove, and there are dimensional errors in manufacturing. Exists. Therefore, the position at which the middle case 4 is pulled out always has a dimensional error. The positioning pin 22d absorbs this error. As shown in FIG. 23, the positioning pin 22d is provided with a taper. And when the lifting base 22 is located at the highest point,
The positioning pin 22d comes to a position where it can be inserted into the positioning hole 4m of the middle case 4.

When the middle case 4 is pulled out from the disk cartridge 9, the position of the middle case 4 in the CC 'direction is positioned by the middle case width positioning guide 30 shown in FIG. At this time, there is a possibility that an error may occur in the pulling-out or housing direction (BB 'direction) of the middle case 4, but this error can also be absorbed by the taper portion at the tip of the positioning pin 22d. Further, the longitudinal direction of the positioning hole 4m of the middle case 4 is the CC ′ direction because the lifting base 22
This is to absorb the amount of movement of the elevating pin 22d in the CC 'direction due to the rotation of the.

When the inner case 4 is positioned as described above, the disk 1 is chucked at the recording / reproducing position, and the spindle motor attached to the elevating base 22 rotates the disk 1. The optical pickup then records and reproduces information on the disc 1.

The disc loading device of the present invention can also be used for a single disc type device.

[0075]

As described above, according to the present invention, unlocking and opening of the disk cartridge can be performed with a simple mechanism. Furthermore, if the disk is pulled out by about halfway, an optical pickup or a spindle motor built into the opening mechanism can record or reproduce information on the disk, and realize a small-sized disk loading device capable of high-speed disk replacement. You can

Furthermore, an opening mechanism for the middle case,
The raising / lowering operation of the raising / lowering base equipped with an optical pickup or the like can be linked, and the positioning of the middle case can be performed at the same time when the raising / lowering is completed. This disc loading mechanism can be used in a device having a single disc cartridge type or a device having a plurality of disc cartridge types (changer device).

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a structure of a disc loading device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view (No. 1) showing the structure of the disc cartridge according to the embodiment of the present invention.

FIG. 3 is an exploded perspective view (No. 2) showing the structure of the disc cartridge according to the present embodiment.

FIG. 4 shows a disk cartridge of the present embodiment,
It is an appearance perspective view showing the state where the middle case was stored.

FIG. 5 shows a disk cartridge of the present embodiment,
It is an appearance perspective view showing the state where the middle case was pulled out.

FIG. 6 shows a disk cartridge of the present embodiment,
It is an appearance perspective view showing the structure near the drawer side.

FIG. 7 shows a disk cartridge of the present embodiment,
It is a partial enlarged view showing an internal structure near the drawer side.

FIG. 8 is an explanatory diagram showing an operation (No. 1) of the disc loading device according to the present embodiment, showing a housed state of the first arm.

FIG. 9 is an explanatory diagram showing an operation (No. 2) of the disc loading device of the present embodiment, showing a state in which the first arm is engaged with the hook of the middle case.

FIG. 10 is an explanatory diagram showing an operation (No. 3) of the disc loading device of the present embodiment, showing a state in which the first arm pulls out the middle case.

FIG. 11 is an exploded perspective view (No. 1) showing the structure of the rotation mechanism portion in the disk loading device of the present embodiment.

FIG. 12 is an exploded perspective view (No. 2) showing the structure of the rotation mechanism portion in the disk loading device of the present embodiment.

FIG. 13 is an external perspective view showing the structure of a rotation mechanism section in the disk loading device of the present embodiment.

FIG. 14 is a plan view showing an operation (first state) of the rotating mechanism section in the disk loading device of the present embodiment.

FIG. 15 is a side view showing an operation (first state) of the rotation mechanism section in the disc loading device of the present embodiment.

FIG. 16 is a plan view showing an operation (second state) of the rotation mechanism section in the disc loading device of the present embodiment.

FIG. 17 is a side view showing the operation (second state) of the rotating mechanism portion in the disc loading device of the present embodiment.

FIG. 18 is a plan view showing the operation (third state) of the rotating mechanism section in the disc loading device of the present embodiment.

FIG. 19 is a side view showing the operation (third state) of the rotating mechanism section in the disk loading device of the present embodiment.

FIG. 20 is a plan view showing an operation (fourth state) of the rotating mechanism section in the disk loading device of the present embodiment.

FIG. 21 is a side view showing an operation (fourth state) of the rotating mechanism portion in the disc loading device of the present embodiment.

FIG. 22 is a plan view showing the relationship between the lifting base and the middle case in the fourth state in the disc loading device of the present embodiment.

FIG. 23 is a side view showing the relationship between the elevating base and the middle case in the fourth state in the disc loading device of the present embodiment.

FIG. 24 is a perspective view showing a configuration of a conventional disc loading device in a disc changer device.

[Explanation of symbols]

 1 Disc 2 Lower Case 2a, 3j Edge 2b Flat Surface 2c Release Lever Support 2d Groove 3 Upper Case 4 Middle Case 4c Cutout 4d Flat 4e Cam Support 4j Inclination 4l Hook 4m Positioning Holes 5e, 6a, 11d, 11e, 22a Hole 5 Lock cam 5a Leaf spring part 5b Cam part 6 Release lever 6b Release hole 7 Pin 8 Guide piece 9 Disc cartridge 11 Base 11a First guide groove 11b Second guide groove 11c Circular hole 11f, 11g Squeeze 12 First arm 12a 1st guide pin 12b 2nd guide pin 12c Hook pin 13 2nd arm 13a 1st drive groove 13b 2nd drive groove 13c, 20a, 21a Rotating shaft 13d 2nd arm drive pin 14 units 14a 1st Bearing 14b Second bearing 15a, 15b Guide shaft 19o Puningu mechanism 20 disc cam 20b second arm drive shaft 20c lift lever driving pin 21 lifting lever 21b elevating base driving section 22 elevating base 22b mount 22c elevation pins 22d positioning pins 23 return spring 30 in case the width positioning guide

Front page continued (72) Inventor Hironori Okazawa 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (7)

[Claims] 1. A cartridge in which a disk is placed in an inner case, lock mechanisms for stopping the withdrawal of the inner case are provided at both corners on the side where the inner case is pulled out, and a cartridge in which the inner case is housed or held so as to be freely drawn A disk loading device for transferring the disk to a reproducing or recording position, the base having a plate-like structure formed on a drawer side of the cartridge and having a pair of guide grooves, and rotatable and movable on the base When the inner case is pulled out and moved to the recording / reproducing position, it is engaged with a key-like hook provided at the tip of the inner case to unlock, and the inner case after unlocking A first arm having a plate-like structure that draws out and guides to the base side; and a first arm that is rotatably held by the base and that engages with the first arm. A second arm having a plate-like structure formed with a pair of drive grooves for moving the first arm to the storage position and the recording / reproducing position of the middle case; and the second arm storing the position and recording / reproducing of the middle case. A disk loading device comprising: a rotation mechanism section that is driven to rotate to a position. 2. The first arm is formed of a plate-shaped member, and a first guide pin is provided upright at one end of the plate-shaped member, and is provided upright at the center of the plate-shaped member. A second guide pin; and a hook pin that is erected on the other end of the plate-shaped member and that engages with the hook of the middle case. The base is the rotary bearing of the second arm. A circular hole, a first guide groove that inserts the first guide pin to regulate the moving direction of the circular hole, and a second guide pin that inserts the second guide pin and cooperates with the first guide groove. The second that regulates the movement amount and the direction of the first arm
And a second drive pin engaging with the first guide pin of the first arm, and a second guide pin of the first arm. A second drive groove that engages and regulates the movement amount and direction of the first arm;
When the second arm is rotated by the rotation mechanism section, the first arm is moved through the drive groove of the second arm and the first and second guide pins. 2. The disk loading device according to claim 1, wherein an arm transfers the inner case to a storage position or a recording / reproducing position. 3. The first arm is formed of a plate-shaped member, and a first guide pin erected on the base-side surface of one end of the plate-shaped member, A second guide pin erected on the base-side surface of the center of the plate-shaped member, and a second guide pin erected on the surface of the other end of the plate-shaped member farther from the base, And a hook pin that engages with a hook, wherein the base is formed of a member having a base surface parallel to the pull-out surface of the middle case, and the base is formed on one edge of the base surface. A circular hole that is provided and serves as a rotary bearing of the second arm, and a starting point D1 is set on the entry side of the middle case along the edge of the base surface, and a point D2 is set in the middle of the base surface. From the starting point D1 to the point D2, an arc a with a radius ra centering on the circular hole Draw and draw a point P between the circular hole and the starting point D1 and draw an arc b with a radius rb from the point D2 around the point P,
A first guide groove that is formed by connecting the circular arc a and the circular arc b, and that regulates the movement direction by inserting the first guide pin; and the first guide groove when viewed from the circular hole. Provided outside the groove,
The circular arc a is translated to the center side of the base surface so that the tangential direction of the midpoint of the circular arc a is substantially parallel to the width direction of the cartridge, and the circular arc c is drawn.
A groove formed by drawing an arc d of (> rb) and connecting the arc c and the arc d, wherein the second guide pin is inserted to cooperate with the first guide groove to form the second guide pin. A second guide groove for restricting a moving direction of the arm, wherein the second arm has a rotation shaft formed in a part of the plate-shaped member, and a radius ra substantially centered on the rotation shaft. A groove formed by drawing an arc e having the same radius re, drawing a curve f in a direction approaching the rotation axis from the end point of the arc e, and connecting the arc e and the curve f to each other. A first drive groove that engages with the first guide pin, and a linear cutout that is substantially parallel to the curve f and in the direction of the end point of the arc e, and engages with the second guide pin of the first arm. A second drive groove for restricting a movement amount and a direction of the first arm; A drive pin that is erected between the second drive groove and the end of the drive groove, and the second arm is rotated by the rotation mechanism section via the drive pin. Of the first arm is engaged with the drive grooves of the first arm and the first and second guide pins to rotate the first arm, and the hook pin of the first arm is attached to the key-like hook of the middle case in the initial position. 2. The lock of the middle case is released by the engagement with the first case, and then the first arm pulls out the middle case and further transfers the middle case to the recording / reproducing position.
The described disc loading device. 4. The rotation mechanism portion is rotatably held by the base so as to be parallel to the second arm, and has an arc-shaped groove having a radius of gyration that changes to at least two types. With 2 arm drive groove,
A disc cam that drives the second arm via the second arm drive groove, and a lift that is rotatably held in a direction parallel to the disc cam and that has a lift base drive groove formed in a bent portion. An elevating base having a lever and a rotating shaft parallel to the moving direction of the middle case, rotatably held around the rotating shaft, and having an elevating pin engaging with an elevating base drive groove of the elevating lever. The disc loading device according to claim 1, further comprising: 5. The disk cam is a disk-shaped member, and has an arc of radius r1 and radius rθ (r1 ≦ rθ ≦ from the axis of rotation).
r2) circular arc, a second arm drive groove cut out so as to connect the circular arc of radius r2, and an elevating unit which is erected on the outer peripheral portion of the disc and abuts on the edge of the elevating lever by the rotation of the disc cam. A lever drive pin, wherein the elevating lever is a member in which a horizontal plate and a vertical plate are integrally formed, and a rotary shaft erected on the horizontal plate, and a vertical character on the vertical plate. A lift base drive groove that is notched like a groove and that engages with the lift pin of the lift base; and a hole that engages with one end of a return spring connected to the base and that receives a rotational biasing force from the return spring. The elevating base is a member in which a horizontal plate and left and right side plates are integrally formed, and is erected on one of the side plates in the same direction as the rotating shaft to drive the elevating base of the elevating lever. Lifting pin that engages with groove and one side plate A positioning pin that is erected in the same direction as the rotation axis of the disc cam and that engages with the positioning hole of the middle case; and a mount for the spindle motor of the disc. When the pin is located at the radius r1 of the second arm drive groove, the second arm and the first arm are positioned at a place for accommodating the middle case, and the elevating base is positioned with respect to the base. The second arm drive groove, the second arm and the first arm are positioned at a position where the middle case is pulled out, and the second arm drive groove is tilted downward. The radius r2 of the second arm and the first arm, the second arm and the first arm are positioned at the recording / reproducing location of the middle case, and the lifting base is used as the base. Disk loading device according to claim 4, wherein the tilting upward to. 6. A disk cartridge having a middle case on which a disk is placed, and an upper case and a lower case for holding the middle case in a retractable or retractable manner, wherein both corners on the drawer side of the middle case. Is provided,
A pair of lock mechanisms having a cam structure for stopping the withdrawal of the middle case, and a part of the middle case located between the pair of lock mechanisms, the penetrating direction being the thickness direction of the middle case, and the width of the middle case. And a positioning hole having an elliptical opening cross section in the direction. 7. A middle case on which a disc is placed and a positioning hole having an oval-shaped opening cross section in the width direction is formed, and an upper case and a lower case for holding the middle case in a retractable or retractable manner. A disk loading device for transferring the disk to a reproducing or recording position from a disk cartridge provided, wherein the positioning pin of the elevating base has a taper portion formed at a tip thereof, and a positioning hole of the middle case. 6. The disk loading device according to claim 5, wherein when fitted, the inner case is restricted to a recording / reproducing position.