JPS583312B2 - Cartridge for disc-shaped recording media - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cartridge for a disc-shaped recording medium, and more particularly, the present invention relates to a cartridge for a disc-shaped recording medium, and in particular, the cartridge main body has a space for accommodating a disc-shaped recording medium and has an opening on one end. It is determined to be axially symmetrical with respect to the center line in the insertion direction of the recording medium, and a concave portion is provided on both side surfaces, while a closing member that removably engages with the cartridge body and closes the opening has a concave portion in the insertion direction. A configuration in which an inclined surface portion that is inclined to the opposite direction and an engagement surface portion that is substantially perpendicular to the insertion direction and that engages with the concave portion of the cartridge main body when coupled with the cartridge main body are symmetrically provided with respect to the center line in the insertion direction. By doing so, it is an object of the present invention to provide a cartridge for a disc-shaped recording medium that has sufficient rigidity and is configured to house the disc-shaped recording medium in a well-sealed manner.

Generally, a video disc playback device is configured so that a video disc can be loaded into or removed from the device by inserting and removing a cartridge that houses the video disc and protects the signal recording surface into the device.

This type of conventional cartridge is configured such that, for example, a pair of hard cartridge halves are hingedly connected, and the upper and lower cartridge halves are rotated in the expansion direction when installed.

For this reason, the internal video disc is exposed to the outside, especially when the disc is mounted, which results in a lack of airtightness, creating an inconvenience that gives the operator a sense of fear that he or she may damage the video disc.

In addition, since the cartridge has a structure in which a pair of cartridge halves are joined only along one side, the rigidity is not sufficient, and for example, when a large number of cartridges are stacked,
This method has the drawback of causing inconveniences such as making impressions on the video disc and causing it to become warped.

In addition, since each cartridge half is relatively thin, it is difficult to maintain flatness during molding.

The present invention eliminates the above-mentioned drawbacks, and one embodiment thereof will be described below with reference to the drawings.

In FIG. 1, 1 is a cartridge according to the present invention.

Note that since the cartridge 1 is symmetrical with respect to the center line in the insertion direction indicated by arrow X1, the configuration on one side will be described below, and the constituent parts on the other side will be given the same reference numerals and the explanation thereof will be omitted.

The cartridge 1 generally consists of a cartridge body (case) 3 that houses a hard video disc 2, and a lid (closing member) 4 that is removably attached to an opening on the front side in the insertion direction of the cartridge body 3 to close it. It has been done.

The cartridge body 3 is, for example, formed by ultrasonically welding three sides of a hard upper lid part and a lower lid part that are similarly molded.
There is a flat disk storage space 5 inside which is slightly larger than the disk diameter and somewhat thicker than the disk thickness.

This space 5 is closed on three sides and is open on the lid mounting side 6.

That is, the cartridge main body 3 is designed such that both side surfaces and the top and bottom surfaces are axially symmetrical with respect to the center line in the insertion direction of the disk-shaped recording medium.

When the lid 4 is removed, the disk 2 stored in the space 5 with its movement in directions other than the direction of arrow be exposed to.

The lid 4 has a flat portion 8 formed over substantially the entire width, a pair of ribs 9 formed near both ends, and a pair of locking arm portions 1.
0 is formed on both ends.

The flat portion 8 has a thickness equal to that of the cartridge body 3, and its central portion is wide enough to fit into the notch 7.

The rib 9 has a thickness that allows it to fit smoothly into the space 5 of the force-tridge body 3 without any play, and prevents the lid 4 attached thereto from wobbling.

The tank arm 10 has a narrow base so that it can be bent in the direction of arrow A, and a latch 11 is formed on the distal end side.

The latch 11 is composed of an inclined surface that is inclined with respect to the direction in which the cartridge 1 is inserted into the playback device, and an engagement surface that is substantially perpendicular to the insertion direction, and these are symmetrical with respect to the center line in the insertion direction. It is set in.

Note that the locking arm 10 of the lid 4 is attached to the lid body 3.
The latch 11 is fitted into the openings 12 on both sides of the lid mounting side 6, and the locking surface of the latch 11 is fitted into the recess 13 inside the side wall.

At this time, the pair of ribs 9 fit into the space 5 to hold the lid 4 stably and firmly, and the wide part of the flat part 8 fits into the notch 7.

At this time, the flat portion 8 of the lid 4 and the outer surface of the cartridge body 3 become approximately on the same plane.

In addition, since the sloped surface portion and the engagement surface portion are provided symmetrically with respect to the center line in the insertion direction, the lid 4 can be easily inserted and engaged into the cartridge body regardless of whether the top or bottom surface is facing upward. Moreover, since the latch 11 is engaged in the concave portion 13, the lid 4 is coupled to the cartridge body 3 in such a manner that it cannot be removed from the cartridge body 3 even if the lid 4 is pulled by hand, and therefore the disc 2 can be held in the cartridge 10. This ensures that the disc 2 does not fall out of the cartridge 1 during cartridge handling.

Furthermore, four pits 14 are formed on the front and back sides of the flat portion 8 of the lid 4 at symmetrical positions with respect to the center in the cartridge insertion direction.

Further, a slit 15 is formed on the side of the lid 4 that is attached to the cartridge body 3, and fits relatively to the outer peripheral portion of the disk 2 protruding through the notch 7 to loosely hold it.

The inside of the cartridge main body 3 includes a flat surface 16 for receiving the outer group guard 2a of the disc 2, a circular flat surface 17 for receiving the label portion 2b, and a circular surface 17 that connects both flat surfaces 16 and 17 on the rear side of the cartridge, and is used for disk mounting and the like, which will be described later. The belt-like flat surface 18 that supports the group guard 2a and prevents the recording surface 2c from contacting the circular flat surface 17 during the detachment operation is at the same height, and the other portions are formed as recesses.

Further, the rising portions 16a and 17a of the flat surfaces 16 and 17 facing the lid mounting side 6 are smooth inclined surfaces,
Discs can be easily stored.

The vicinity of the opening of the plane 16 and the circular surface 17 may be replaced by a plurality of narrow ribs extending in the direction of the arrow x1, as shown by the two-dot chain line in the same figure. The risk of the disk recording surface being scratched by dust adhering to the flat surfaces 16 and 17 is more effectively prevented.

Note that when the lid 4 is attached to the cartridge body 3 as shown in FIG. 2, the disc 2 is stored with limited contact with the inner wall of the recording surface 2c and with a slight play.
Escape to the outside is definitely restricted.

Further, since the cartridge body 3 has a relatively high rigidity, the disk 2 is held without losing its flatness.

Furthermore, as will be described later, since the side surface of the cartridge main body 3 in the insertion direction does not open even when the disk device is inserted and removed, the degree of sealing of the cartridge 1 is improved accordingly.
Moreover, there is no psychological adverse effect on the operator in terms of damage to the disk 2 at all.

In addition, since the cartridge 1 is formed by connecting the lid 4 to the opening side of the cartridge body 3, it has sufficient strength especially against forces in the compression direction, and even when a large number of cartridges are stacked, the internal disk There is no risk of making any impressions or bends on 2.

Next, the mechanism of a disk-shaped recording medium reproducing apparatus that can use the cartridge of the present invention will be explained with reference to FIGS. 2 and 3.

FIG. 2 is a partially cut away perspective view showing the state of one embodiment of the disk-shaped recording medium playback device before the disk is mounted, with the top lid, side walls, etc. omitted and shown in correspondence with the above-mentioned cartridge; FIG. FIG. 3 is a vertical side view of the playback device shown in FIG.

In the reproducing device 20, the detection head 21 having the reproducing needle 21a is retreated to the standby position shown in FIG.

The turntable 22 is fixed to the top of a spindle 23 and rotates at high speed during playback.

The push-up body 24 has a disk and a ring connected together by a plurality of pillars.
It is disposed at the center of the turntable 3, and although it rotates integrally with the turntable 3, it can be vertically displaced independently of it.

An annular conical convex portion 24a is formed on the upper surface of the push-up body 24, and the conical convex portion 24a fits tightly into the center hole of the disk 2.
An annular magnet 25 is fixed inside thereof.

The push-up body 24 is displaced upward by the rotation of a push-up arm 27, which is disposed below the turntable 22 and whose base is supported by a shaft 26, with a ring being locked at the horseshoe-shaped end thereof. .

The push-up arm 27 rotates upward as the L-shaped rotation lever 28 rotates clockwise about the shaft 29.

The suppressing body 30 hangs down with an inverted conical shaft 530a loosely fitted into a hole of the pressing arm 31, and faces the pushing body 24.

A ferromagnetic disk 32 and a leaf spring 33 for grounding the surface of the disk are attached to the suppressor 30.

The pressing arm 31 is bent into an L shape, with the bent portion being an axis 34.
The rotating position is controlled by wires 45 and 84 connected to the bending arm as will be described later.

When the disc is loaded, that is, in the stop mode, the rotation control lever 40, which is pivotally supported on the right side wall of the playback device 20 and has a bent Rondo, has its locking arm 40a locked to the detection head 21, and the torsion spring 41 The rotating lever 42 rotates in the direction of the arrow B against the arrow C, and the bent portion of the rotating lever 42 is engaged with the hook portion 43a of the lever 43 connected to the lever 40, and the rotating lever 42 rotates in the direction of the arrow C as shown in the figure. It rotates into position.

When the rotating lever 42 is rotated to the above position, the L-shaped rotating lever 28 is rotated in the direction of the arrow D by the tensile force of the coil spring 35, and the push-up arm 27 is moved in the direction of the arrow E as shown in FIG.
It is rotating in the direction.

Further, the push-up arm 31 is rotated in the direction of arrow F via a wire 45.

As a result, the pushing body 24 and the pushing body 30 are moving upward as shown in FIG.

The lever 46 pushes up the push-up arm 2 in response to insertion of the cartridge.
It is a lever that restricts the rotation of the arm 7, and has arm portions 46a and 46b bent in substantially orthogonal directions at both ends.

One arm 46a is in contact with the upper surface of the push-up arm 27, and a roller 47 is attached to the other arm 46b.

The roller 47 projects into the guide rail through a notch 50a of the guide rail 50, which will be described later.

Next, a mechanism for removing the cartridge lid from the cartridge body and clamping the lid will be described with reference to FIG. 4 and FIG. 5 (4).

In the playback device 20, a front guide rail 50 is disposed on the left side, and a front guide rail 51a and a rear guide rail 5lb are disposed on the right side, each extending in the cartridge insertion direction.

The detection head 21 is located between the guide rails 51a and 51b.
There is a space for the transfer passage.

The guide rail 50 and the rear guide rail 5lb are provided with q-ra 52 for unlocking the cartridge lid 4.
and 53 are provided facing each other and projecting a predetermined distance inside the guide wall.

The actuating lever 54 is bent into a U-shape, and the bent portions of the actuating lever 54 are attached to pins 57 and 58 mounted on brackets 55 and 56.
The locking portion 54a is rotatably supported by the locking portion 54a, and is rotated in the direction of the arrow G by the tensile force of the tension coil spring 59.
protrudes toward the turntable.

Further, pins 60 and 61 that are set up on the distal end side of each arm of the operating lever 54 are provided with a lid clamp mechanism, which will be described later.

Since each clamp mechanism is constructed in the same way,
Only one mechanism will be explained below.

A pair of clamp levers 62 and 63, which have bent locking claws 62a and 63a on the tip side, are rotatably supported on a pin 60 and are open, and a hole formed in the other arm is connected to the back wall of the device. It is loosely fitted into pins 6.4 and 65 which are set up in the.

The clamp levers 62 and 63 are connected to the pin 64 and 65 by E-rings 66 and 67 fitted to the tips of the pins 64 and 65.
．． 65 so that it does not come out, and each pin 6
4 and 65 are pushed in the direction of arrow X2 by compression coil springs 68 and 69 provided around them.

At this point X, the actuating lever 54 is disengaged from the pin 70 and latch 71 and is rotating in the direction of arrow G, so the clamp levers 62 and 63 are closed to the respective locking claws 62a and 63a.
The locking claws 62a, 63a rotate in a direction to separate from each other.
The width of the opening is larger than the thickness of the cartridge 1.

Next, a mechanism for clamping the disk will be explained with reference to FIG. 4 and FIG. 5A.

The upper finger 75 is connected to the shaft 7 mounted on the bracket 76.
7, and the lower finger 78 is pivotally supported on a shaft 79, and both fingers 75 and 78 are arranged at a position slightly projecting from the lid clamp mechanism in the direction of arrow X2.

A roller 80 is rotatably attached to the tip of the upper finger 75, and the lip surface protrudes from the front surface (left side in FIG. 4A) and bottom surface of the tip of the finger.

As a result, the leading end of the cartridge 1 inserted into the device does not come into contact with the finger 75 but with the roller 80 to operate the clamp mechanism, and this operation is performed smoothly as described later. .

The tip side of the lower finger 78 is bent appropriately so that it can rotate without hitting the edge of the turntable 22, and its tip surface is bent against the disk in order to securely clamp the disk. It is made of a material with a high coefficient of friction.

The lower finger 78 is rotated in the clockwise direction in FIGS. 3 and 4A by the spring force of the torsion spring 81, while the upper finger 75 rotates in the same direction. It is locked and guided by the hanging arm of the lower finger 78 and held in a counterclockwise rotated position.

The opening 80 of the upper finger 75 and the tip of the lower finger 78 are not in contact with each other, but the gap t between them is smaller than the thickness of the group guard 2a of the disk 2.

Further, the hanging arm portion 75b of the upper finger 75 is connected to the pressing arm 31 by a wire 84 guided by a tension coil spring 82 and a roller 83.

Note that the coil spring 82 functions to prevent the wire 84 from loosening.

The lock lever 85 is attached to the shaft 87 by a compression coil spring 86.
It is applied with a rotational force in the direction of arrow H, and comes into contact with the hanging arm portion 75b.

Further, both ends of a wire 89 guided by rollers 88a and 88b are connected to the lock lever 85 and the lever 46.

The operating states of the cartridge lid clamping mechanism and the video disc clamping mechanism with respect to the cartridge insertion depth will now be described with reference to FIG. 6.

In the figure, a stroke 100 indicated by arrows at both ends indicates a rotational range of the actuating lever 54.

Similarly, the stroke 102 is the range where the cartridge lid 4 is unlocked from the cartridge body 3, and the stroke 102
is the range where the lid 4 is clamped by the pair of clamp levers 62 and 63, and the strokes 103 and 104 are the range where the lid 4 is clamped by the roller 80, respectively.
shows the range in which it rolls on the upper surfaces of the cartridge lid 4 and the cartridge main body 3.

Point 105 also indicates the position where pin 70 is locked by latch 71.

From the figure, at point P1, the lid 4 is attached to the cartridge main body 3.
The lid 4 is clamped by a pair of clamp levers 62 and 63 at the point P2, and the roller 80 is rolling on the upper surface of the cartridge body 3, and at a point P2, the lid 4 is released from the clamp. It can be seen that the cartridge body 3 is connected to the cartridge body 3.

By determining the operation timing of each mechanism as described above, it becomes possible to perform disk loading and unloading operations without any trouble and reliably.

Next, the operation of loading and unloading a video disc into the playback apparatus having the above configuration will be explained with reference to FIGS. 4B and 4C and 5B and 5C.

The cartridge 1 containing the disc 2 is inserted into the playback device 20 through the front opening 20a, as shown in FIG.

The cartridge 1 is first inserted while being guided by the apron 20b, and both side surfaces are guided by the guide rails 50 and 51a.

When the door 90, which normally closes the opening 20a, is inserted while being guided by the apron 20b, the door 90, which normally closes the opening 20a, is pushed by the tip of the door on its inclined surface and rotates about the shaft 91 to open the door. do.

Subsequently, the cartridge 1 is guided by fitting its guide groove 19 into the bent portion 50b of the guide rail 50, and is guided by the guide rails 50 and 51a on both sides, so that displacement in the device width direction is limited. It is inserted in the direction of arrow X1.

When the cartridge 1 is inserted into the reproducing apparatus, the roller 47 is first pushed against the front end of the cartridge, and the lever 46 is rotated in the direction of the arrow 1 in FIGS. 1 and 2.

The rotation of the lever 46 causes the push-up arm 27 to rotate against the coil spring 35, causing the push-up body 24 to move downward and retreat from the cartridge insertion passage.

At this time, since the detection head 21 is in the standby position, the pressing body 30 moves upward and similarly retreats from the cartridge insertion passage.

As a result, the cartridge 1 is moved to the pusher body 24 and the pusher body 3.
It is inserted in the direction of arrow X1 without colliding with zero.

Note that when the detection head 21 has not returned to the standby position, the door 90 is locked in the closed state, thereby preventing incorrect cartridge insertion.

Further, the roller 47 thereafter rolls on the lower surface side of the cartridge 1.

When the cartridge 1 is inserted to the vicinity of the inner part of the reproducing device 20, the cartridge lid 4 presses against the roller 80, and the upper finger 75 rotates in the direction of the philtral arrow J in FIG. 4 against the torsion spring 81.

At this time, since the roller 80 rolls on the front end of the cartridge lid 4 with a small resistance, the upper finger 75 rotates smoothly and the roller 80 rides on the top plan view 8 of the lid 4 as shown in FIG.

On the other hand, the lower finger 78 is locked by the upper corner of the crosspiece 75a due to the rotation of the upper finger 75, and moves more quickly than the upper finger 75 over a larger angle.
rotate in the direction.

As a result, the lower finger 78 does not come into contact with the cartridge 1 as shown in FIG. 4B.

Thereafter, the rollers 80 are moved according to the insertion of the car ridge 1.
The lid 4 subsequently rolls on the top surface of the cartridge body 3,
Cartridge 1 is pushed in without resistance.

Further, when the cartridge 1 is inserted further from the position indicated by the middle point P2 in FIG.
is locked to the front end surface of the cartridge and rotates against the coil spring 59 in the direction opposite to the arrow G in FIG. 5B (clockwise).

Due to the above-mentioned rotation of the operating lever 54, the pair of clamp levers 62 and 63 are rotated in a direction in which their respective bent locking claws 62a and 63a approach each other, and are fitted into the et 14 of the cartridge lid 4. , move in the direction of arrow X1.

Further, due to the above-mentioned insertion of the cartridge 1, the pair of locking arms 10 of the lid 4 have their sloped surfaces locked by the rollers 52 and 53 and are bent, and the latch 11 is released from the concave portion 13, causing the cartridge body 3 of the lid 4 to be bent. will be unlocked.

Therefore, when cartridge 1 is pushed to the final position,
That is, when the operating lever 54 is rotated to the position where it is locked by the latch 71, the roller 80 is moved toward the cartridge body 3.
Located on the upper side, the clamp levers 62 and 63 clamp the cartridge lid 4, and the locking arm 10 locks the cartridge body 3, so that the lid 4 can be removed from the cartridge body 3.

Next, when the car holder 1 is pulled out in the direction of arrow
3, the cartridge is held as shown in FIG.

At this time, since almost all of the disk 2 is inside the cartridge body 3, the disk 2 is held within the cartridge body 3 by the frictional force between the disk 2 and the inner wall of the body, and moves 5 to form a group that has come out of the slit 15. The guard 2a is exposed from the notch 7 of the cartridge body 3.

When the roller 80 comes off the edge of the cartridge body 3, the upper finger 75 and the lower finger 78 immediately rotate in the direction opposite to the directions of arrows J and K, and the torsion spring 8
The group guard 2a of the disk 2 is clamped by the roller 80 and the tip of the lower finger by the spring 1.

As a result, when the cartridge 1 is subsequently pulled out, the disk 2 is relatively pulled out of the cartridge body at a position directly above the turntable 22.

When the cartridge main body 3 is pulled out to the position of the roller 47, the push-up arm 27 is rotated by the coil spring 35, and the push-up body 24 is moved upward.

The push-up body 24 supports the label portion 2b of the disc 2 that has escaped from the cartridge main body 3, and supports a pair of fingers 75.
．． It cooperates with the clamp 78 to horizontally support the disk 2.

As a result, the disk 2 continues to escape from the cartridge body without causing scratches or the like, and even after the cartridge body 3 escapes from the device opening 20a, it is horizontally supported directly above the turntable 22.

To start playing after removing the cartridge,
Rotate the operating lever 92 in the direction of arrow L.

By this operation, the lever 43 is lifted, and the rotating lever 42 is released from the lock by the hook portion 43a and rotates in the direction opposite to the arrow C to a position where it is locked to the stopper 93.

As a result, the pressing arm 31 and the pressing arm 27 rotate due to their own weight, and the pressing body 30 and the pushing body 24 descend.

Further, due to the above-described rotation of the pressing arm 31, the upper finger 75 rotates in the direction of the arrow J via the wire 84 and the coil spring 82, and at the same time, the lower finger 78 rotates in the direction of the arrow J in the same manner as when inserting the cartridge. By rotating in the K direction, the clamp on the disk 2 is released.

Therefore, the disk 2 is attracted to the suppressor 3 by the attractive force of the magnet 25.
0 and the push-up body 24 and mounted on the turntable 22, and can rotate at high speed integrally with the turntable 22.

Note that the upper finger 75 has its hanging arm portion 75b locked in a notch 85a of the lock lever 85, and is restricted from returning.
Each finger 75 and 78 is held in the rotated position.

A performance is performed each time the detection head 21 moves in the direction of the center mark Y1 in FIG. 1 and the reproducing needle 21a relatively traces the recording surface 2c of the disc 2.

When the detection head 21 performs a playback performance, the rotation control lever 40 is released from the locking arm 40a and is rotated by the torsion spring 41 in the opposite direction of the arrow B.
The hook portion 43a of No. 3 climbs over the bent portion of the rotating lever 42,
When the locking state is reached and the performance ends, the detection head 2
1 moves in the arrow \2 direction and returns to its original position.

At this time, the rotating lever 42 is locked to the hook portion 43a of the lever 43 and rotates in the direction of arrow C, the push-up arm 27 and the push arm 31 rotate, and the push-up body 24 and the push body 30 are both raised. movement, and the bond due to magnetic force is released.

As a result, the disc 2 is supported by the push-up body 24 and floats above the turntable 22.
It rotates integrally with this due to its inertia.

The playback device of the present invention employs a mechanism similar to the mechanism described in Japanese Patent Application No. 11875/1987 "Lid Lock Device" previously proposed by the applicant, and the playback device of the turntable 22 is While the inertial rotation continues, the door 90 is locked,
Incorrect cartridge insertion is prevented.

When the turntable stops rotating, video disc 2
is held at a height opposite to the open end of the empty cartridge body 3 to be inserted.

Next, to explain the operation when the video disc is removed,
When the empty cartridge main body 3 is inserted into the playback device in the same way as when it is installed, the disc 2 rises and reaches the inclined part 1.
6a and 17a, and is relatively smoothly accommodated within the space 5 of the cartridge body 3.

When a part of the disk 2 enters the space 5 and the cartridge body 3 pushes the roller 47, the lever 46 rotates in the direction of the arrow ■, the push-up arm 27 rotates, and the push-up body 24 descends. , the lock lever 85 is rotated via the wire 89 to unlock the upper finger 75,
Group guard 2a is clamped again by the pair of fingers 75 and 78.

Therefore, even if the push-up body 24 descends, the disc 2 is clamped by the pair of fingers 75 and 78 and stably held at a predetermined height position, so that the disc 2 continues to move into the storage space 5 of the cartridge body 3. It is stored smoothly in the

When the cartridge main body 3 is inserted into the push-up body 24 without colliding with it and is inserted to near the final position, the roller 80 is pushed away by its front edge in the same manner as in the case of installation above, and the upper and lower fingers 75 and 78 expands, and the clamp on the group guard 2a is released.

When the cartridge body 3 is inserted to the final position, the lid 4 comes into contact with the front side of the cartridge body 3, and the operating lever 5
4 rotates, and the engagement between pin 70 and latch 71 is released.

As a result, the operating lever 54 rotates back in the direction of arrow G to the position shown in FIGS. is pushed back to point P2.

When the cartridge 1 is pushed back by the actuating lever 54, the lid 4 is released from the clamping by the pair of clamp levers 62, 63, and the contact between the locking arms 10 and the unlocking rollers 52, 53 is released. Lid 4
is locked to the cartridge body 3.

Thereby, by subsequently pulling out the cartridge 1, the disc 2 is removed from the playback device 20 while being housed in the cartridge body 3 by the locked lid 4.

When playing back the recording surface on the opposite side of the disc 2, the same operation as above may be performed with the cartridge 1 reversed.

Although the above embodiment describes the operation when loading and unloading a hard video disc, the above playback device is not configured to clamp the disc by pushing it into the clamp mechanism, but to operate at a position where a pair of fingers are close to or in contact with each other. Since the present invention is configured to clamp the disc by moving the disc, it is possible to reliably clamp a soft sheet-like video disc without buckling it, and therefore it can be applied to soft sheet-like discs as well.

In the case of an apparatus for playing sheet-shaped discs, a fixed rotation stabilizing plate is provided in place of the turntable, and a mechanism is added that operates in conjunction with the fingers to lift the sheet-shaped disc to the cartridge insertion slot.

Furthermore, the cartridge 1 according to the present invention is not limited to the video disc 2, and can also accommodate and protect audio records.

Note that if a disk is already installed in the device,
Even if a real cartridge enclosing another disk is accidentally inserted, the lid of the real cartridge will hit the disk supported by the pusher, preventing the cartridge from being inserted.

This prevents disk duplication.

As described above, the cartridge for a disc-shaped recording medium according to the present invention includes a cartridge main body having a space for accommodating a disc-shaped recording medium and an opening at one end surface, and a cartridge main body that is removably connected to the power storage main body. The cartridge main body includes a closing member that closes the opening, and both side surfaces and the top and bottom surfaces of the cartridge body are determined to be axially symmetrical with respect to the center line in the insertion direction of the disc-shaped recording medium, and a concave portion is provided in the both side surfaces. and the closing member has an inclined surface portion that is inclined with respect to the insertion direction, and a retaining surface portion that is substantially perpendicular to the insertion direction and that engages with the concave portion of the cartridge body when coupled with the cartridge body. Since the cartridge is arranged symmetrically with respect to the center line in the insertion direction, the cartridge can be inserted normally into the main body of the playback device with either the front or back side facing up, and it is shaped like a disc with both sides serving as recording surfaces. Since the recording medium can be used effectively, when using this disc-shaped recording medium, it can be selectively loaded so that the front or back side becomes the playback surface, and the disc-shaped recording medium can be collected in the cartridge. When cleaning the surface of the cartridge,
There is no need to make the back surface correspond to either the front surface or the back surface of the disk-shaped recording medium, and the disk-shaped recording medium can be collected into the cartridge.

Furthermore, since the closing member is configured as described above, it can be easily inserted and engaged into the cartridge body whether the upper or lower surface is facing up, and since the engaging portion is configured as described above, this The closing member is engaged in such a manner that it cannot be easily removed even if the closing member is pulled by hand, so that the disk-shaped recording medium can be reliably held within the cartridge.

Furthermore, the disk-shaped recording medium storage device according to the present invention includes a cartridge main body having an opening at one end, and a member detachably connected to the cartridge main body to close the opening. Therefore, it has greater rigidity than a cartridge formed by connecting a pair of cartridge halves with a hinge along one side, and even when handling it or stacking a large number of them, the flatness of the disk-shaped recording medium is impaired. It can completely prevent the formation of impressions, etc. on the recording medium, and has a simple structure with no moving parts.
Furthermore, since the disc-shaped recording medium is not exposed to the outside of the device when it is attached, it is possible to achieve a perfect sealing degree for the disc-shaped recording medium, which eliminates the operator's anxiety regarding damage to the recording body. Since the closing lid member is connected to the opening side of the box-shaped rigid body, the rigidity against compressive force can be particularly improved, and furthermore, it is possible to effectively reduce the thickness and simplify the structure of the reproducing device. It has excellent features such as

[Brief explanation of drawings]

FIG. 1 is a partially cutaway exploded perspective view of one embodiment of the cartridge according to the present invention, and FIGS. 2 and 3 are perspective views and vertical sectional side views of a reproducing apparatus in which the cartridge of the present invention can be used with the top cover removed. Figures 4A, B and C are diagrams showing the operating state of the mechanism for clamping the group guard of the disc, which is disposed inside the playback device shown in Figures 2 and 3, respectively, when installed. Figures A, B, and C are diagrams showing the operating states of the mechanism for clamping the lid of the cartridge according to the present invention when installed, respectively, and Figure 6 is a diagrammatic representation of the operation timing of the clamping mechanism shown in Figures 4 and 5. FIG. 1... Cartridge, 2... Video disc, 3... Cartridge body, 4...
... Lid, 5... Space for disc storage, 6...
...Lid attachment side, 7...Notch, 8...
- Flat part, 9...Rib, 10...Lock arm, 11...Latch, 13...
Recessed portion, 14... pit, 15... slit, 16... plane, 17... circular plane, 18... band-shaped plane, 16a , 17a...
...Rising portion, 20...Reproduction device, 21.
...Detection head, 21a...Regeneration needle, 2
2... Turntable, 54... Operating lever, 62, 63... Clamp lever, 71
...Latch, 75...Upper finger,
78...Lower finger, 83...Roller.

Claims (1)

[Claims] 1. Consists of a cartridge body having a space for storing a disc-shaped recording medium and an opening on one end surface, and a closing member that is detachably connected to the cartridge body and closes the opening, and has a closing member on both sides of the cartridge body. The surface portion and the upper and lower surface portions are determined to be axially symmetrical with respect to the center line in the insertion direction of the disk-shaped recording medium, and a concave portion is provided on both side portions, and the closing member has an inclination that is inclined with respect to the insertion direction. A disk characterized in that a surface portion and an engagement surface portion that is substantially perpendicular to the insertion direction and that engages a concave portion of the cartridge body when coupled with the cartridge body are provided symmetrically with respect to a center line in the insertion direction. A cartridge for recording media.