JPS61227264A - Mounting device for recording medium - Google Patents

Abstract

PURPOSE:To effectively mount a recording medium by using a four section link moving a clamp member of a recording medium with maintaining a parallel condition with respect to a surface of the recording medium. CONSTITUTION:Four section links 84a-84d are in parallel with a disk receiver 27 and front and rear links 84a-84d are overlapped in a horizontal direction. A leaf spring 81 is in parallel with a base plate 2. Respective parts of a disk cartridge 6 are lowered so as to draw a circular arc and the front and rear links 84a-84d are turned clockwise to be a condition as shown in an alternate long and short dash line. Herein, the respective ends of the pair of the front and the rear links 84a-84d are disposed in the same distance in a horizontal direction. The leaf spring 81 can be maintained so as to be parallel with the bass plate 2. At this time, a disk pressing member 89 is moved to direct above a center hole 30 of a disk 25, abut against a circumference of the center hole 30 in a ring shape, and rotatably clamps the disk 25 by an energizing force of the leaf spring 81 through a pivoting ball 88 and a holding member 86.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a recording medium mounting device suitable for reducing the thickness of the recording medium.

[Technical background of the invention and its problems] In recent years, industries related to information such as computers have made remarkable progress, and the amount of information handled is rapidly expanding.

For this reason, information can be optically recorded at high density on a disc-shaped recording medium (hereinafter referred to as a disk) and reproduced at high speed using laser light instead of a conventional magnetic head. Optical recording and reproducing devices are attracting attention.

As mentioned above, when recording information at a high density or reading information recorded at a high density, if there is dust on the disc, incorrect recording or playback may occur, so the disc is generally stored inside the cartridge. Furthermore, when this cartridge is not installed in a recording or playback device, it covers the recording surface (generally both sides) of the disk, and when it is installed in a device, at least the radial portion is open, and after installation, the disk is rotated. This allows the optical pickup device to access any concentric or spiral track to write or read information.

When recording or reproducing at the above-mentioned high density, it is necessary to irradiate the disc with a light beam from a semiconductor laser, etc., condensing it into a minute spot, so a high-precision focus servo means is required. Also used as the disk is a disk-shaped member that is less warped, has good flatness, and has no flexibility.

Since this disk is rotated at a higher speed than a conventional flexible magnetic disk (so-called floppy disk), the disk is rotated without contacting each side of the cartridge.

In addition, in the conventional device for the above-mentioned disk cartridge mounting mechanism, the disk cartridge inserted to a predetermined position is moved in a direction perpendicular to the insertion direction to fit the center hole of the disk into the tapered surface of the disk guide. Therefore, the disk was rotatably supported by a disk clamp means.

The disk clamping means described above is similar to the disk clamping means in conventional floppy disk devices.
This was done using a clamp member attached to the tip of a bridge that pivoted around the tip of the inserted disk cartridge.

The clamp member was suspended from the bridge, and its own weight kept it parallel to the disk. Therefore, depending on the structure of the hanging portion, the clamping member may get caught and perform a clamping operation while being tilted relative to the disk, and the disk may not be properly fixed.

Furthermore, due to its own weight, a device that supports the disk vertically cannot be used because the clamp member is always tilted relative to the disk.

[Object of the Invention] The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a recording medium mounting device that enables reliable lamp operation.

[Summary of the Invention] The present invention realizes a reliable recording medium mounting device by using a four-bar link that moves the recording medium clamping member while keeping it parallel to the surface of the recording medium.

[Embodiments of the invention] Hereinafter, the present invention will be specifically described with reference to the drawings.

1 to 13 relate to one embodiment of the present invention, FIG. 1 is a perspective view of one embodiment in which a disk is mounted (however, the disk clamping means and bias coil are removed), and FIG. The figure is a side view of Fig. 1, Fig. 3 is a side view of the disc installed state, Fig. 4 is a plan view of Fig. 2, Fig. 5 is a plan view of Fig. 3, and Fig. 6 is a side view of Fig. 3. 7 is a perspective view showing the disk cartridge, FIG. 8 is a side view showing the peripheral part of the locking piece, FIG. 9 is a side view showing the rotating piece to which the pressing piece is attached, and FIG. 10 11 is an explanatory view showing that the disc is set to the installed state when the locking piece is released, and FIG. 11 is a side view showing that the disc is held in the cartridge holder while it is being installed. , FIG. 12 is a schematic side view showing the four-bar link that holds the disk clamping means, and FIG. 13 is a schematic side view showing the four-bar link that holds the disk clamping means and the bias coil.

In a (disk) mounting device 1 according to one embodiment used for a magneto-optical recording and reproducing device nail, an eject plate 3 is placed on spacers erected at four locations on a substrate 2, and the eject plate 3 is placed in a position corresponding to the spacer. An eject guide 5 provided on the upper end surface of each spacer is inserted into each guide groove 4 provided at four locations, and an eject plate 3 is mounted so as to be movable in the longitudinal direction of the guide groove 4, that is, in the front-rear direction. .

The front end of the eject plate 3 provided with the guide groove 4 (in FIG. 1, the right side where the disk cartridge 6 of the mounting device 1 is inserted is the front side, and the disk cartridge 6 is inserted into the mounting device 1. The eject operation knob 7 is located in the center of the left side, which is the tip, facing forward.
is installed protrudingly. This eject knob 7 has a board 2
A guide groove 9 into which a cartridge receiver 8 installed upright is inserted.
is the provision.

The cartridge support 8 supports the rear side of the back surface of the disk cartridge 6 when the disk cartridge 6 is installed.In addition to this cartridge support 8, there is also a cartridge support that supports the front side of the disk cartridge 6. 9a and 9b are erected at two positions on the left and right sides of the rear side of the board 2.

The eject plate 3 has a substantially rectangular shape, and has a wide tapered opening from the center to the rear side. This eject plate 3
side frames 10a, 10b at the front and rear of the left and right sides;
10a and 10b are installed upright, and each side frame 10a (or 10b
) is provided with a guide groove 11a (or 11b) in the vertical direction, and each guide groove 118 (or 11b) is pivoted to one end of each dogleg-shaped lever 12a (or 12b). The roller shaft 13a (or 13b) is engaged via a rotatable roller.

The dogleg-shaped lever 12a (or 12b) is connected to the board 2.
Holding plates 16a (or 16
In b), a roller shaft 17a (or 17b) is rotatably supported with a roller interposed therebetween, which is pivoted at the center of the shape.

Moreover, the other end of the lever 12a (or 12b) is
A roller shaft 19a (or 19
b) is pivotally supported via a roller. Note that the O-La shaft is prevented from being removed by a retaining ring 20a (or 20b).

The cartridge holder 18 is shown in FIG. 1 or 4, for example.
As shown in the figure or FIG. 6, a guide frame 22a for guiding the insertion of the disk cartridge 6, which has an opening-shaped cross section in the front and back on both sides of the cartridge holder main body 21 formed of a substantially square plate-like member; 22b is bent so that the disk cartridge 6 can be inserted through the opening 23 at the front end of both guide frames 22a, 22b.

An opening 24 is formed by cutting out the rear part from the center of the cartridge holder main body 21, and a disk-shaped recording medium used for recording and reproducing using the magneto-optical effect is placed on the substrate 2, etc. below the opening 24. A spindle motor (indicated by the reference numeral 25 in FIGS. 2 and 3) is attached to rotate a disk 25 as a medium, and a disk holder 27 is attached to the rotating shaft of the spindle motor 25 that projects upward. A disc guide 29 having a tapered surface 28 is mounted inside the disc holder 27.

The tapered surface 28 of the disc guide 29 fits into the center hole 30 of the disc 25 when the disc cartridge 6 is inserted, lowered, and installed in a predetermined position. It is designed to support the concentric ring portions. (Refer to factor 10 or FIG. 12) Below the opening 24 of the cartridge boulder body 21 and at a rear position adjacent to the disk guide 29, a magneto-optical pickup device (not shown) is installed in the longitudinal direction of the opening 24, that is, at a rear position adjacent to the disk guide 29. It is designed to be movable in the radial direction of the mounted disk 25.

The opening 24 in the cartridge holder main body 21
The positions near the rear end on both sides are also notched and open 032a, 32
b, and the openings 32a, 32b move directly above the cartridge receivers 9a, 9b when the cartridge is installed, and the back side of the disk cartridge 6 is opened to each opening 32a.
, 32b so that it can be supported by the cartridge receivers 9a, 9b. (See FIG. 5) The cartridge receivers 9a, 9b have an engagement protrusion 33a concentrically protruding from the center of the upper end surface thereof.

33b (see FIGS. 2 to 4), and when the disk 25 is installed, the protrusions 33a and 33b engage in positioning holes 34a and 34b formed on the left and right sides of the front side of the disk cartridge 6, respectively. The back side of the disk cartridge 6 can be supported in a predetermined positioning state.

By inserting the disk cartridge 6 through the opening 23 at the front end of the cartridge holder 18 along the inside of both guide frames 22a and 22b, the disk cartridge 6 is set to the installed state by a series of loading mechanisms described later, and has the structure shown in FIG. ing.

That is, the disk cartridge 6 that houses the disk 25 inside forms a cartridge body 36 by integrating an upper cartridge section 35A and a lower cartridge section 35B. This cartridge body 36 is provided with a circular opening 37 in the center thereof so that the disk 25 can be clamped from both upper and lower sides when installed, and extends from this opening 37 to the front end side (when inserted). Apertures 38 for recording and reproduction are provided on both the upper and lower sides.

A pair of scissor-shaped shutter blades 39a and 39b are housed inside the openings 37 and 38 to cover each side of the disk 25 facing the openings 37 and 38.

Each pair of shutter blades 39a, 39b is connected to a bin 41a fixed to the left and right corners of the rear side of the cartridge body 36.
, 41b, and a pair of shutter blades 39a are supported near the ends by coil springs 42a and 42b, respectively.
, 39b are urged to close together.

On the other hand, slide grooves 43a and 43b are provided on both sides of the cartridge main body 36, and each of these slide grooves 43
Hooks 44a and 44b are slidably attached to a and 43b, and each hook 4Aa and 44b is attached to a wire 45a.
, 45b are each fixed at one end, and the other end is a guide roller 46a.

It is fixed to the front ends of the shutter blades 39a and 39b via 46b. Therefore, each hook 44a.

By sliding the shutter blade 44b from the state shown in FIG. 7 along the slide grooves 43a and 43b as shown by arrows 47a and 47b, each shutter blade 39a and 39b can be opened around the pin 418.41b. That's how it is.

The hooks 44a and 44b are attached to the cartridge holder 18.
The hooks 44a and 44b protrude outside the guide frames 22a and 22b of the guide frame 22, and the hooks 44a and 44b are attached to the guide frame 22 for the disk cartridge 6 to be inserted for mounting the disk cartridge 6.
contacting the front ends of a and 22b in a state of protruding outward,
The movement of the disk cartridge main body 36 is restricted, and the hooks 44a and 44b move relatively within the slide grooves 43a and 43b (their positions move with the insertion operation), and the disk cartridge main body 36 side is inserted. Upon insertion, the pair of shutter blades 39a and 39b on both the upper and lower sides of the disk 25 are opened, so that the disk 25 is ready for clamping and recording or reproducing.

As described above, the cartridge main body 36 has positioning holes 34a penetrating vertically on both left and right sides of the front part thereof.
, 34b are provided.

Openings 37 provided on the upper and lower surfaces of the cartridge main body 36
．． 38 is opened and closed by a pair of shutter blades 39a, 39b, respectively. A disk 25 is housed in which a center hole 30 is provided between a pair of shutter blades 39a, 39b.

By the way, on the rear side of the cartridge holder 18,
It is activated at the front end of the inserted disk cartridge 6,
A loading mechanism is provided to set the disc 25 in a mounted state in which the disc 25 is rotatably clamped, and an eject mechanism is provided to eject the disc 25 by pressing the eject knob 7 from the disc 25 in the mounted state.

Support members 5Ia, 5 are provided on both sides of the rear portion of the substrate 2.
1b is erected, and for example, roller shafts 52a,
The base sides of locking pieces 53a and 53b for holding the cartridge holder 18 are rotatably supported via 52b.

The base side thereof is pivotally supported by the roller shafts 52a and 52b,
As shown in FIG. 8 or 10, each of the locking pieces 53a and 53b protruding forward has a locking notch 54a on the lower side of the tip that matches the shape of the end of the cartridge holder 18.
54b is provided.

On the other hand, the cartridge holder 18 has springs 56a at two positions on the left and right sides of the rear frame portion 55.

One end of each spring 56b is attached to the spring 56a.

Each other end of 56b is connected to supporting members 57a and 5 erected on the substrate 2.
7b (see Fig. 4).

The cartridge holder 18 has both springs 56a and 5.
6b, the support members 57a, 57b are biased so as to be drawn in the direction in which the other ends of the springs 56a, 56b are fixed, that is, diagonally backward and downward. In this biased state, when the loading mechanism is not activated, that is, for example, in the state shown in FIG. 2, the upper part of the rear end of the cartridge holder 18 is As shown by the solid line in FIG. 10, the internal retaining pieces 53a and 53b (one of them is shown in a locked state in the figure).

) is held in a locked state in contact with each of the notches 54a and 54b, and the cartridge holder 18 is held so as not to fall.

Cartridge holder 1 as shown in FIG. 8 or 10
The locking pieces 53a and 53b, which prevent the lowering of the cartridge holder 18 with the upper part of the rear end thereof engaged in the notches 54a and 54b, are attached to the rotation shown in FIG. 8 or 9 attached to the cartridge holder 18. Moving piece 58a.

The tips of pressing pieces 59a and 59b, which serve as unlocking members attached to the tip side of 58b, are in contact with the back surface thereof.

The base sides of the rotating pieces 58a and 58b are rotatably connected to roller shafts 61a and 61b via rollers at a position near the rear end of the cartridge holder 18. Therefore, the pressing pieces 59a, 5 are placed at a certain distance from the pivoted positions of the rotating pieces 58a, 58b.
9b are attached respectively. As shown in FIG. 8, the base ends (of the pressing pieces 59a, 59b) are installed at a distance shorter than the distance d from the pivoted position to the tips of the pressing pieces 59a, 59b. It is.

Also, in the locking pieces 53a, 53b, the tips of the pressing pieces 59a, 59b come into contact or almost come into contact in the middle of the distance from the pivotally mounted roller shafts 52a, 52b to the respective notches 54a, 54b. That's how it is.

Note that the base end portions of the pressing pieces 59a and 59b are connected to the fifth
8 or 10, the cartridge holder 18 is rotated through the right and left notches in the rear frame 55 and slightly protruding inward from the deepest part of the insertion path for the disk cartridge 6. It is attached to the moving pieces 58a and 58b.

Therefore, when the disk cartridge 6 is inserted, its front end comes into contact with the proximal ends of the pressing pieces 59a and 59b as shown by the solid line in FIG. When the pressing pieces 59a and 59b are inserted by pressing the pressing pieces 59a and 59b by a minute distance 1 as shown in
a and 59b rotate clockwise around the roller shafts 61a and 61b as shown by arrow 62A, and the amount of movement of the distal end becomes larger than the movement of the base end due to the above-mentioned pressing, and this increased With the stroke, the middle positions of the back surfaces of the locking pieces 53a and 53b are flipped upward. As a result of this flip-up, the tips of the locking pieces 53a, 53b are largely rotated counterclockwise as shown by the arrow 63A around the roller shaft 52a, and are at the position shown by the dashed line. 54b and the cartridge holder 18 are disengaged from each other.

When the locking by the inner retaining pieces 53a and 53b is released, the cartridge holder 18 is pulled diagonally backward and downward by the biasing force of both springs 56a and 56b, and therefore Dog-shaped levers 12a and 12b are rotatably supported, respectively.
The cartridge holder 1 rotates counterclockwise around its central pivot point as shown by arrow 64A in FIG.
8 also descends in a 1/4 arc.

That is, the cartridge holder 18 is held in a state in which the disc cartridge 6 is housed inside it, that is, in a state in which it is held parallel to the disc holder 27, when both springs 56a, 5
The levers 12a and 12b move toward the back with the force of being drawn to the side, and at that time, they rotate with the length from the center to the end of the levers 12a and 12b as the radius of rotation, and as shown in the dashed line in FIG. 10 or as shown in FIG. It should be set to the installed state.

In this mounted state, the back surface of the disk cartridge 6 is supported by three cartridge supports 8.9a and 9b, and the center hole 30 of the disk 25 is fitted into the tapered surface 28 of the disk guide 29.

As will be described later, the disk 25 is rotatably pressed and held from the upper side by disk clamp means.

In addition, each locking piece 53a, 53b is connected to the supporting member 51a, 51.
are lightly pressed by leaf springs 65a, 65b attached to the upper ends of b, and are biased so that the tips of the locking pieces 53a, 53b do not rotate counterclockwise from the position indicated by the solid line in FIG. When the disc 25 is ejected from the mounted state, the locking pieces 53a and 53b rotate counterclockwise and return to the locking position shown by the solid line in the figure.

Incidentally, support plates 66a and 66b are provided upright on both sides of the rear end of the eject plate 3, and regulation frames 67a and 67b are provided on the upper end side of each support plate 66a and 66b to project horizontally inward. . On the other hand, projecting pieces 6 projecting rearward from the left and right ends of the frame portion 55 at the rear end of the cartridge holder 18.
8a, 68b are interposed with rollers, and roller shafts 69a, 6
A lever 71.71b to which 9b is pivotally mounted is provided.

The levers 71a, 71bG, t are mounted so as to be rotatable in a plane perpendicular to the substrate 2 about the roller shafts 69a, 69b as shown in FIG. 2 or FIG. 11. In one embodiment shown, each lever 71a, 71b is
Lever main bodies 72a, 72b, and lever main bodies 72a, 7
Lever pieces 73a and 73b protruding forward from 2b are bent and formed as a single piece.

As shown in FIG. 11, leaf springs 74a and 74b are attached to the rear sides of the lever bodies 72a and 72b (only one with the symbol a is shown in the figure), and the leaf springs 74a
, 74b are in contact with the regulating frames 67a, 67blC to prevent the L/bars 718, 71b from rotating clockwise. In this state, the lever pieces 73a, 7
The protrusions 75a and 75b fixed to the tips of the disks 3b are retracted above the insertion path in the cartridge holder 18 into which the disk cartridge 6 is inserted. In this state, the lever bodies 72a, 72b have projecting pieces 76a, 76b formed adjacent to the protruding lever pieces 73a, 73b from the deepest part of the insertion path of the disk cartridge 6 in the cartridge holder 18. It is designed to protrude inward.

When the disk cartridge 6 is inserted along the insertion path, each protrusion 7 is inserted at the tip of the disk cartridge 6.
6a, 76b are pressed at a position below the position of the roller shafts 69a, 69b, which are the centers of rotation, and therefore each protrusion 75a, 75b Gt above the center of rotation moves clockwise as shown in FIGS. 11(a) to (b). each protrusion 75a,
75b is a positioning hole 34a for the disk cartridge 6.
.

34b, respectively.

The tips of the protruding pieces 76a, 76b are the pressing pieces 59a, 59.
The protruding piece 76a protrudes further inside the insertion path than the proximal end of the protruding piece 76a when the disk cartridge 6 is inserted.
, 76b are pressed and the levers 71a, 71b rotate,
At this time, the protrusion 75a.

75b will be engaged in the positioning holes 34a, 34b. In this way, from FIG. 11(a) to FIG. 11(b)
Move to the state shown in . The state just before moving to FIG. 8(b), that is, the state just before the protrusions 75a and 75b are completely inserted into the holes 34a and 34b, is shown by the solid line in FIG. 8 or 10. state. In other words, the inserted tip of the disk cartridge 6 is the pressing piece 59a,
59b, and then further minute m (symbol J in Fig. 8).
2) When moved, the disk cartridge 6 presses the pressing pieces 59a, 59b rearward as described above, and the pressing pieces 59a are pressed and moved.

59b, the locking pieces 53a, 53b are flipped up as shown by the dashed line, and the locking pieces 53a.

The locking of the cartridge holder 18 by each notch 54a, 54b of 53b is released. This state is shown by the dashed line in FIG. 8 or 10 and in FIG. 11(b).

In this state, the cartridge bolt 18 is moved by the spring 5.
Due to the biasing forces of levers 6a and 56b, the levers 12a and 12b are rotated around the pivot joints at the center of each lever, and the length up to the vertical end is the radius of rotation, as shown by arrow 64A in FIG. Rotate approximately 90 degrees.

In this case, since the positioning holes 34a, 34b and GC protrusions 75a, 75b are engaged, the disk cartridge 6 is inserted in the insertion direction together with the cartridge holder 18 while being prevented from escaping from the cartridge holder 18. In this state, that is, in a state where the levers 12a and 12b are held parallel to the disk receiver 27, the levers 12a and 12b descend while drawing a trajectory that is approximately 1/4 of a circular arc with the length from the center to the end as the radius.

When the cartridge holder 18 is rotated and lowered,
As shown in FIG. 10, one of the lever pieces of the levers 12a and 12b, which is erected upward, is oriented in a horizontal direction that is substantially parallel to the surface of the substrate 2.

Therefore, when the other lever piece of the levers 12a, 12t) is rotated, the guide groove 11a in the side frames 10a, 1Ob, which are erected in front and back of both sides of the injection plate 3, is rotated.
, 11b while pressing the side walls of the guide grooves 11a, 11b to move the eject plate 3 forward together with the side frames 10a, 10b.

When the cartridge holder 18 is lowered, the disk 25 housed in the disk cartridge 6 is moved around the outer periphery of the center hole 30 of the disk 25 fixed to the rotating shaft of the spindle motor, as shown for example by the dashed line in FIG. The position of the center ball 30 is supported, and the center ball 30 is brought into a state where it fits into the tapered surface 28 of the disk guide 29.

By inserting the disc cartridge 18, the protrusions 75a and 75b are inserted into the hole 34 of the disc cartridge 18.
a, 34b, and then release the locking by the locking pieces 53a, 53b to fit the disk 25 into the disk guide 29. A disk clamp mechanism is provided that rotatably clamps the disk with a clamping means.

That is, facing the upper side of the disc guide 29, a rectangular plate spring 81 for disc pressing has four locations on roller shafts 82a, 82b, and 82C.

A roller is interposed in each of 82d to form a four-bar link 84a,
It is attached to 84b, 84c, and 84d.

The plate spring 81 has, for example, a cutout-shaped groove (see FIGS. 4 and 5), so that the biasing force acting on the center part in the part where the groove is not formed has an appropriate elastic force. It's Nishide. The plate spring 81 has, for example, three locking holes 85A and 85B in the center thereof.

As shown in FIG.
A rotatable disk presser 89 is provided via the disk holder 8 to form a disk clamp device 90.

When the disk 25 is not installed, the four-bar links 84a, 84b, 84c, and 84d are connected to the solid lines in FIG.
As shown in the figure or FIG. 2, the link part of the part where the leaf spring 81 is attached is in a horizontal plane parallel to the board 2, extends rearward, and is bent at a right angle at a position rearward from the rear end of the cartridge holder 18. spacers 92 and 92 that are rotatable on two parallel roller shafts 91A and 91B that are installed on both support members 57a and 57bf [that are erected on the substrate 2].
It is rotatably supported via...

A pair of links 84a and 84b, each end of which is rotatably attached to the left and right sides of the front part of the leaf spring 81 that provides biasing force for disc clamping in the disc clamp mechanism, are L-shaped and bent. Two roller shafts 9 at the ends
It is pivotally supported by a front roller shaft 91A in 1A and 91B.

On the other hand, a pair of links 84c and 84d, each of which has one end pivotally attached to the left and right sides of the rear portion of the leaf spring 81, are approximately U-shaped and are located in the same horizontal plane as the roller shaft 91A.
The roller shaft 91B is pivoted at an L-shaped bent portion from one end of the roller shaft 91B, which is spaced apart by a distance equal to the distance between the front and rear pivot positions in the cartridge holder 18. Slide grooves 94a and 9 formed in side pieces 93a and 93b on both sides of the opening 24 on the bottom surface
4b, roller shafts 95a and 95b whose respective other end portions of the opening shape are fixed via an O-ra are engaged.

The side pieces 93a and 93b formed on both sides of the opening 24 of the cartridge holder 18 slightly protrude downward from the bottom surface of the cartridge holder 18 and extend in the front-rear direction, and the slide grooves 94a of the side pieces 93a and 93b ,94b
The links 84c and 84d, whose other ends are engaged with each other, move the cartridge holder 18 downward, that is, the levers 12a and 12.
As the roller b rotates, each other end rotates around the roller shaft 91B while relatively moving in the slide grooves 94a and 94b.

The distance between the roller shafts 91A and 91Bfll is equal to the distance for pivotally supporting the leaf spring 81 in the front and rear, and
, 84b and the rear links 84c, 84d have the same length of arm from the center of rotation to each end.

The levers 12a and 12b are the retaining plates 16a.

When the cartridge holder 18 rotates around the pivot point at 16b and descends (or ascends) in an approximately 1/4 arc while maintaining a horizontal state, the pair of front and rear (DI
J') 84a, 84b: 84c, 84d are configured to rotate clockwise (or counterclockwise) about roller shafts 91A, 91B, respectively. In this case, since the arm lengths of the front and rear pairs of links 84a, 84b; 84c, 84d are equal, the same rotation radius is always maintained, and therefore the surface of the leaf spring 81 is always held parallel to the surface of the disk holder 27. It will fall (or rise).

This state is shown in FIG.

Here, the solid lines indicate the four-bar links 84a, 84b, and 84c when the disk cartridge 18 is not installed.

84d is parallel to the disk receiver 27, and the front and rear links 84
a, 84b: 84c and 84d are horizontally overlapped, and of course the leaf spring 81 is also parallel to the board 2, and when the disk cartridge 6 is installed, each part of the disk cartridge 6 draws an arc. descend,
Along with this, front and rear links 84a, 84b: 84c, 84
d rotates clockwise to the state shown by the dashed line. In this state, a pair of front and rear links 84a, 84b:
One end of each of 84G and 84d is located at the same distance in the horizontal direction, and the plate spring 81 is configured to be held parallel to the substrate 2. When the disc holder 89 moves downward, the disc 25
At this time, the disc 25 contacts the periphery of the center hole 30 in a ring shape, and is moved by the biasing force of the leaf spring 81 via the pivoting ball 88 and the holding member 86. is in a state where it can be freely rotated and clamped.

The four sections of the above configuration are B4a, 84b, and 84c.

84d allows the (disk) clamp device 90 to move up and down while maintaining parallelism with the disk receiver 27, so that the clamp device can be securely mounted on the disk receiver 27.

On the other hand, when recording or reproducing is performed with the disc 25 clamped, and then the eject knob 7 is pressed to move the eject plate 3 backward in order to take out the disc cartridge 6, each lever 12a, 12b
The cartridge holder 18 rotates clockwise about its central pivot point, and the cartridge holder 18 rises in a trajectory opposite to that when the loading mechanism is activated, that is, in a circular arc.

Therefore, the pressing pieces 59a, 59b are fixed to the locking pieces 53a, 5.
3b (as shown by the solid line in FIG. 8 or 10), the tip of the cartridge holder 18 is locked in the notches 54a, 54b of the locking pieces 85a, 53b. and then the regulating rods 67a, 67b T-lever 71 when moving backward together with the eject plate 3.
a, 71b (7) The leaf springs 74a, 74b are pressed counterclockwise, and the protrusions 75a, 75b are aligned with the positioning holes 34a,
It will be retracted to the upper side from the state where it is engaged in 34b.

At the same time, the disk cartridge 6 inserted into the guide path of the cartridge holder 18 is connected to the coil spring 72 via the wires 45a and 45b inside the disk cartridge 6.
It is designed to be projected toward the opening 20 by the biasing forces of a and 72b.

In this way, the state returns to the state where the disk cartridge 6 is not installed.

By the way, in a magneto-optical recording/reproducing device, a bias coil 10 for applying a magnetic field is used to ensure reliable recording.
0 (shown in FIG. 13) is attached so that the bias coil 100 can be brought close to the upper surface of the disk 25 when the disk 25 is mounted, similar to the disk clamp mechanism described above.

Tsumari, the above 4th verse! Junk 84a, 84b, 84c, 8
For example, a leaf spring 101 is connected to the roller shaft 102 in order to hold a bias coil 100 for applying a magnetic field on the rear side adjacent to the disk clamp device @90 held at the tip of the disk 4d.
A, 102b, 102c, 102d are interposed with rollers, and the four points are connected to four-bar links 104a, 104b, 104.
c, held at 104d.

The leaf spring 101 has a rectangular shape that is elongated in the front and back so that it can cover the recording area in the radial direction of the disk 25 to be loaded, and a pair of links 10 are provided on both the left and right sides of the front and back.
4a, 104b: 104c.

Each end of 104d is pivotally mounted.

Further, the leaf spring 101 is provided with a mouth-shaped groove similar to the leaf spring 81, so that it holds the bias coil 100 and allows fine adjustment of the mounting position in the vertical direction.

The bias coil 100 is attached to one end of the 4
Nodal links 104a, 104b, 104c.

104d has substantially the same structure as the four-bar link for the disk clamp described above. In this embodiment, the front links 104a and 104b are approximately U-shaped, and the rear links 104c and 104d are L-shaped.

That is, the distance between the front and rear pivot positions of the leaf spring 101 is set equal to the distance between the two roller shafts 91A and 91B, and the front link 1 whose one end is pivotally connected to the leaf spring 101
04a and 104b are pivotally supported by the roller shaft 91A midway, and then bent forward and extended, and the other end is connected to the side piece 93.
Side pieces 105a, 105 provided adjacent to a, 93b
The O-ra shafts 107a and 107b, which are fixed via rollers, are inserted into the slide grooves 106a and 106b of b.

Therefore, the four-bar link 84a for the disk clamp,
Similar to 84b, 84c, and 84d, the front and rear links 104a, 104b are linked to the lifting and lowering of the cartridge holder 18.
: The end portions of 104c and 104d rotate with equal arm length, and the leaf spring 101 or bias coil 100 is vertically raised and lowered with its surface held parallel to the disk 25.

Note that the support members 51a and 51b are also provided with regulating rods 108a and 108b on the inside in the horizontal direction, and when mounted, the lever 7
The protrusions 75a and 75b of 1a and 71b are the positioning holes 34
This is to ensure that the state in which the levers 71a and 34b are engaged is maintained, and when the leaf springs 74a and 74b attached to the levers 71a and 71b come into contact with each other, the leaf springs 74a and
74b is designed to urge the protrusions 75a, 75b in the direction of engagement in the holes 34a, 34b.

Note that in the first embodiment, the four-bar links 84a, 84
b, 84c, 84d and 104a, 104b, 104c
, 104d, one of the front and rear parts is L-shaped and the other is shaped like an opening, but both can be shaped like an opening. In addition, the shape is not limited to the shape of an opening, but it is also possible to form the shape into an L-shape and drive it to rotate around the roller shafts 91A and 91B using a motor, a spring, a plunger, or the like.

Note that if the bias coil 100 is not required, such as in an optical disk device, the 4-bar link 1 for the bias coil 100 is used.
04a, 104b, 104c, and 104d are not required.

Note that the present invention is characterized by the use of a four-bar link, and mechanisms other than the four-bar link are not limited to those shown in the drawings, and are not limited to conventional examples or, for example, Japanese Patent Application No. 1983- It is also applicable to the device of No. 280854.

Note that the present invention is applicable not only to optical disks and magneto-optical recording and reproducing apparatuses, but also to magnetic recording and reproducing apparatuses in which a recording medium is attached and detached.

[Effects of the Invention] As described above, according to the present invention, the disk clamping means that rotatably holds the disk using the four-bar link can be moved up and down while keeping it parallel to the disk surface. Reliable lamp operation can be achieved.

[Brief explanation of the drawing]

Figures 1 to 13 relate to one embodiment of the present invention;
The figure is a perspective view showing the mounting device of one embodiment with the disk clamping means and bias coil portion removed; FIG. 2 is a side view of the mounting device shown in FIG. 1; FIG. is a plan view of FIG. 2, FIG. 5 is a plan view of FIG. 3, FIG. 6 is a perspective view of FIG. 3 with the disk cartridge removed, FIG. 7 is a perspective view of the disk cartridge, and FIG. The figure is a schematic side view showing the locking piece that holds the cartridge holder, Figure 9 is a side view showing the rotating piece to which the pressing piece is attached, and Figure 10 is the vicinity of the locking piece which is the main part of the loading mechanism. a schematic side view showing the part;
FIG. 11 is a schematic side view showing the area around the lever that locks the disk cartridge to the cartridge holder in order to securely mount the disk, and FIG. 12 is the area around the disk clamp means that moves up and down to clamp the disk when the disk is attached or removed. FIG. 13 is a schematic side view showing the vicinity of the four-bar link that holds the bias coil. 1... Disc mounting device @ 2... Board 3... Eject plate 4... Guide groove 6... Disc cartridge 7... Knob 8... Cartridge receiver 10a, 10b... Side frame 11a, 11b... Guide grooves 12 a, 12 b... Lever 16a, 16b... Holding plate 18... Cartridge holder 21... Cartridge holder main body 23... Frontage 25... Disc 27
...Disc holder 28...Tapered surface 29...
・Disc guide 30...center hole 39a,
39b...Shutter blades 53a, 53b...Locking pieces 54a, 54b...Notches 56a, 56b...Springs 58a, 5B'o-...Rotating pieces 59a, 59b...Pushing pieces 68... Projections 718, 71b-17 Bars 74a, 74b... Leaf springs 75a, 75b... Projections 76a, 76b... Projections 81... Leaf spring 84a
, 84b, 84c, 84cj - 4-bar link 89... Disc presser 90... Disc clamp device 93a, 93b... Side piece 94a, 94b... Slide groove 100... Bias coil 101... Plate spring 10
4a, 104b, 104c, 104d...4-section link

Claims (1)

[Scope of Claims] A recording medium mounting device that allows a disc-shaped recording medium to be removably mounted, wherein a clamping means for rotatably clamping the recording medium is movable up and down in a direction perpendicular to the surface of the recording medium. A recording medium mounting device characterized in that it is formed using a four-bar link.