JPH087517A - Clamp built-in type cartridge and its assembly method - Google Patents

Abstract

PURPOSE:To obtain a cartridge of a clamp built-in type with which stable clamping performance and assembling performance are assured and its assembly method. CONSTITUTION:A housing part 5 is constituted in a cartridge case 3 formed by superposing an upper half 1 and a lower half 2 on each other and the clamp 8 fixed with a disk 4 and a magnetic plate 9 is housed therein. The clamp 8 is held by inserting a shaft 18 implanted on the inside wall surface of the lower half 2 into a through-hole 10 formed at the center of the clamp in such a manner that the clamp 8 is engageable with a turn table 20 of a disk motor when the cartridge is mounted at a player device and that the shaft 18 and the through-hole 10 do not come into contact with each other in the clamped state of the disk 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartridge for accommodating a disc-shaped information recording medium used in an information storage device such as a data file device and an image file device, and more particularly to mounting the information recording medium on a turntable of the device. The present invention relates to a cartridge having a built-in clamp and a method for assembling the same.

[0002]

2. Description of the Related Art A center hole is formed in an optical disk such as a CD or a CDROM. There are two types of methods for centering and fixing this optical disk on the turntable of the player device, a mechanical clamp method and a magnet clamp method. In the mechanical clamp method, the taper portion of the turntable enters the center hole of the optical disc, and the optical disc is sandwiched by a clamper pressed by a spring or the like from above the optical disc to center and fix the optical disc on the turntable. In the magnet clamp system, the taper portion of the turntable to which the magnet is fixed enters and is sandwiched from above the optical disc by a clamper made of a magnetic plate, and the optical disc is centered and fixed to the turntable.

On the other hand, if the optical disc itself is held by hand and mounted on the player device, the operability is poor and the optical disc may be scratched or fingerprinted. As a solution to this problem, there is a method in which an optical disc is stored in a cassette or a caddy containing a clamp and is mounted on a player device. An example of a cassette that has a built-in mechanical clamp is
No. 0790. This cassette is shown in Figure 12.
And it demonstrates based on FIG.

As shown in FIG. 12, the cassette 101 is
It is composed of a main body 102 having a space for accommodating the optical disc 105 and a lid 103, both of which are connected by a shaft so as to be opened and closed so that the optical disc 105 can be taken in and out. A shaft 104 is provided at the center of the inside of the main body 102, and a clamp 106 is loosely supported by the shaft 104. A spring pad 107 is attached to the shaft 104, and the spring pad 107 and the clamp 10 are attached.
A conical spring 108 is attached between the conical spring 108 and the valve 6.

When this cassette is mounted on the player device, as shown in FIG. 13, the turntable 109 of the disc motor enters the cassette 101 and the clamp 1
Engage with 06. At this time, the optical disc 105 is centered and fixed to the turntable 109 by the pressing force generated from the conical spring 108. When the disk motor rotates, the conical spring 108 and the spring pad 10
The turntable 109, the optical disk 105, the clamp 106, and the conical spring 108 rotate integrally with each other in a state where the turntable 109, 7 and 7 slide.

Next, examples of caddies having built-in magnet clamps are shown in Japanese Utility Model Publication No. 63-122955 and Japanese Utility Model Publication No. 63-153376. This caddy will be described with reference to FIGS.

As shown in the figure, the caddy 201 is composed of a main body 203 for accommodating an optical disc 202 and a lid 204, and has an opening / closing structure for allowing the optical disc 202 to be taken in and out. The main body 203 is formed with an opening 205 into which an optical head and a disk motor can be inserted,
A shutter 206 that opens and closes the opening 205 is movably attached. A circular opening 207 into which a clamp 210 for arranging the magnetic plate 211 can be inserted from the outside of the lid 204, and a clamp housing 209 in which a flange 208 for preventing the clamp 210 from coming off are formed in the center of the lid 204. Has been. After the clamp 210 is stored in the clamp storage portion 209, a stopper plate 211 is adhesively fixed to the lid body 204 so as to prevent the clamp 210 from coming off so as to cover the circular opening 207. When the caddy 201 is mounted on the player device, the turntable of the disc motor enters the caddy 201 through the opening 205. At this time, the magnet fixed to the turntable attracts the magnetic plate 211 of the clamp 210, and the optical disc 202
Is centered and fixed on the turntable. Optical disc 20
In the state where the centering and fixing of 2 are performed, the clamp 21
0 is held at a position where it does not contact the flange 208 and the stop plate 211. When the disc motor rotates, the turntable, the optical disc 202, and the clamp 210 rotate together.

[0008]

However, the cassette of the first conventional construction as described above has the conical spring 1
The biasing force generated in 08 acts on the lid 103, and the lid 10
3 may be deformed. Also the conical spring 10
8 and the spring pad 107 are slidably rotated while being pressed, a large frictional force is generated, and the optical disc 1
The rotation of 05 may not be stable, and the shavings of the sliding portion may adhere to the optical disc 105. Meanwhile, the second
In the conventional configuration, the clamp does not come into contact with the lid body 204 when the optical disc 202 rotates, so that the problem as in the first conventional example does not occur. However, the clamp housing portion 209 for housing the clamp 210 so as not to fall off from the lid body 103 is required, and the circular opening 207 and the flange 208 are formed in the lid body 103, so that the shape of the lid body 103 becomes complicated. Further, since the stopper plate 211 is adhesively fixed to the lid body 103 after the clamp 210 is inserted into the lid body 103, the number of assembling steps increases and the aesthetic appearance of the caddy is impaired.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object thereof is to provide a clamp built-in type cartridge which secures stable clamp performance and assembly performance, and an assembly method thereof. To do.

[0010]

A cartridge with a built-in clamp according to the present invention is a cartridge in which a disc and a clamp having a magnetic plate are rotatably housed, and a cartridge case is composed of an upper half and a lower half. The lower half is provided with an opening for inserting the turntable of the disc motor for rotating the disc and the pickup, and the inner surface of the upper half can be inserted with the clamp from the inner surface of the upper half. In this state, clamp holding means for holding the clamp at a predetermined position engageable with the turntable is provided, and the clamp holding means is arranged at a position where it does not come into contact with the clamp when the disc is loaded on the turntable. Therefore, the above object is achieved.

In some cases, the clamp holding means is a shaft erected on the inner surface of the upper half, and a hole that can be inserted into the shaft is formed at the center of the clamp. The clamp holding means may be a recess or an annular projection provided on the inner surface of the upper half, and a part or all of the clamp may be retained in the recess or the space inside the annular projection.

The clamp can be brought into contact with a disc,
An elastic member may be provided that elastically deforms to reduce the clamp height when the clamp engages the turntable.

In the unclamped state, the disk may be sandwiched between the lower half and the elastic member of the clamp and fixedly supported in the cartridge. In some cases, the clamp is made of a magnetic plate and synthetic resin, and the elastic member is integrally formed of synthetic resin.

Further, according to the method of assembling the cartridge with the built-in clamp of the present invention, the disc can be placed on the lower half having the opening for inserting the turntable of the disc motor for rotating the disc and the pickup. The step of inserting the magnet-equipped clamp fixing member that engages with the clamp through the opening and setting it at a predetermined position, the step of placing the disc on the magnet-equipped clamp fixing member in the lower half, and the step of mounting the clamp having the magnetic plate A step of engaging a clamp fixing member with a magnet by sandwiching the disc and suction fixing, and a clamp can be inserted from the inner surface side of the upper half, and in the state of the cartridge case, the clamp is held at a predetermined position where it can be engaged with the turntable. The upper half provided with the clamp holding means is superposed on the lower half to form a cartridge case. And which, above objects can be achieved.

[0015]

With the above construction, in the cartridge with a built-in clamp of the present invention, the circular opening for inserting the clamp and the stopper retaining plate for covering the circular opening in the upper half are not required, and the clamp is provided inside the cartridge to turn the apparatus. Since it is held at a position where it can be engaged with the table, the shape of the upper half is simplified, the number of components of the cartridge is reduced, and inexpensive and stable clamping performance can be obtained. Further, in the cartridge with a built-in clamp of the present invention and the method for assembling the same, the step of bonding the retaining plate for preventing the clamp from coming off is unnecessary, and since the components can be inserted and assembled from one direction with a simple assembly jig, the number of assembly steps is reduced. It can be greatly improved.

[0016]

EXAMPLES Examples of the present invention will be described below.

(Embodiment 1) First, the construction of a clamp-embedded cartridge according to Embodiment 1 will be described with reference to FIGS.

As shown in FIG. 2, the clamp-embedded cartridge of the first embodiment has a cartridge case 3 in which an upper half 1 and a lower half 2 made of synthetic resin are superposed on each other. The upper half 1 and the lower half 2 are fixed by a known means such as ultrasonic welding. Inside the cartridge case 3, as shown in FIG.
The inner wall surface and the storage wall 4 and the storage portion 5 surrounded by the inner wall surface of the upper half 1 and the storage wall 4 (not shown) are formed.
Inside the housing portion 5, a 1.2 mm-thick disk 6 having a central hole 7 and a clamp 8 made of synthetic resin to which a magnetic plate 9 is fixed are housed. The thickness of the magnetic plate 9 is 1 mm
Therefore, the total height of the clamp 8 is 3 mm. As shown in FIG. 4, with the cartridge mounted in the player device,
The space of the storage portion 5 is set so that the disk 6 and the clamp 8 do not come into contact with the cartridge case 3. Generally, the space of the storage portion 5 is determined in consideration of the thickness error of the disc, the warp of the cartridge case, the height error of the turntable of the disc motor, and the height error of the clamper. In this embodiment, the disc 6 is loaded when the player is loaded.
The lower half 2 is designed to be 0.7 mm apart, and the clamper 8 and the upper half 1 are designed to be 0.7 mm apart. A through hole 10 that engages with a shaft 18 described later is formed at the center of the clamp 8. The lower half 2 has a positioning hole 11 for engaging with a pin of the player device to fix the cartridge at a predetermined position, and an opening 12 for allowing the disc motor and the pickup to be inserted into the accommodating portion 5.

Further, the lower half 2 is provided with a shutter 13 for opening and closing the opening 12. The shutter 13 is associated with a cover 14 that covers the opening 12, a slider 15 that engages with slider guides 17 provided on the upper half 1 and the lower half 2 to make the shutter 13 movable, and a shutter opener of the player device. It includes an opener guide 16 for opening the combined shutter 13. Shutter 1
Reference numeral 3 is biased by a shutter spring (not shown) in a direction to close the opening 12. A shaft 18 that is inserted into the through hole 10 of the clamp 8 and restricts the movement of the clamp 8 is formed at the center of the inner wall surface of the lower half 2. The diameter of the shaft 18 is such that when the cartridge is mounted on the player device, the clamp 8 is in a position where the clamp 8 can engage with the turntable 20 of the disc motor, and when the disc 6 is clamped, the shaft 18 and the through hole 10 contact each other. It is set to a size that does not touch. Normally, the allowable range of center deviation in which the clamp can be engaged with the turntable by the magnet clamp method is about 2 mm. In this embodiment, the shaft 18 and the through hole 10 of the clamp 8 are provided.
The gap is designed to be 2 mm. The length of the shaft 18 is
Even if the clamp 8 is in the most separated state from the upper half 1, the length of the shaft 18 is set such that a part of the shaft 18 enters the through hole 10 and the shaft 18 and the turntable 20 of the disk motor do not come into contact with each other. There is. In this embodiment, the shaft 18 is designed to have a length of 2 mm and the through hole 10 has a length of 2 mm.

The operation of the clamp built-in type cartridge constructed as described above will be described below with reference to FIGS. 3 and 4.

First, a case where the lower half 2 is placed in a non-use state will be described. As shown in FIG. 3, the disc 6 and the clamp 8 fall downward by their own weight, the clamp 8 contacts the disc 6, and the disc 6 contacts the lower half 2. In this state, the clearance is 1.4 mm when the clamp 8 and the upper half 1 are most separated from each other. At this time, since the length of the shaft 18 is 2 mm, the shaft 18
The tip portion of 0.6 mm enters into the through hole 10 of the clamp 8. Even in this state, since the shaft 18 is in the through hole 10 of the clamp 8, the clamp 8 is held at a position where it can be engaged with the turntable 20 and does not move freely in the storage section 5.

Next, a case where the clamp-embedded cartridge is mounted on the player device will be described. As shown in FIG. 4, a turntable 20 is provided on the motor shaft 19 of the player device. The turntable 20 has a flange 21 fixedly fitted to the motor shaft 19 for mounting the disk 6, and a yoke having a tapered outer periphery to which a ring-shaped magnet 22 similarly fixedly fitted to the motor shaft 19 is fixed. 23, a taper cone 24 slidably guided by the motor shaft 19, and a compression coil spring 26 for urging the taper cone 24 upward. A taper portion 25 is provided on the outer circumference of the taper cone 24 and engages with the center hole 7 of the disk 6 to center the disk 6. The ring-shaped magnet 22 attracts the magnetic plate 9 of the clamp 8 to attach the disk 6 to the flange 2
It is for fixing to 1. 3 as the clamping force
Ring magnet 2 so that 100 to 400 g can be obtained.
Even if the gap between 2 and the magnetic plate 9 is about 1.8 mm, 100 g
The shapes of the ring-shaped magnet 22 and the magnetic plate 9 are selected so that a front and rear attraction force can be obtained. The outer peripheral taper of the yoke 23 is provided to facilitate the insertion of the center hole 7 of the disk 6 and the centering of the clamper 8. The tip height of the yoke 23 is
It is located 2 mm from the disk mounting surface of the flange 21.

When the cartridge with built-in clamp is loaded into the player device, the pin of the player device is inserted into the positioning hole 11 of the lower half 2 to position the cartridge with built-in clamp. In this process, the shutter opener becomes the opener slot 16 of the shutter 13.
When it enters, the shutter 13 is moved to open the opening 12. Further, the turntable 20 and a pickup (not shown) are inserted into the storage portion 5 through the opened opening 12. When the turntable 20 comes close to a predetermined position, the taper portion 25 of the taper cone 24 is inserted into the center hole 7 of the disk 6.
At the same time that the disk 6 enters, the clamp 8 is attracted to the yoke 23 and moves toward the center of the yoke 23 to move the disk 6
Push down. And the disk 6 is a taper cone 24
It is fixed to the flange 21 while being centered by.
As shown in FIG. 4, when the centering and fixing of the disk 6 is completed, the shaft 18 and the through hole 10 of the clamp 8 have a distance of 1 mm.
Do not contact with a gap of. The gap between the disc 6 and the lower half 2 and the gap between the clamp 8 and the upper half 1 are 0.
It will be 7 mm.

Further, the tip of the shaft 18 and the turntable 2
The gap of the yoke 23 of 0 is larger than 0.7 mm and does not contact. After that, the disk motor rotates, but the clamp 8 does not come into contact with the cartridge case 3, so that the disk 6 can obtain stable rotation.

Next, the assembly of the clamp-embedded cartridge of this embodiment will be described with reference to FIG.

As shown in FIG. 5, the assembly jig 31 has a pin 32 for positioning the same cartridge as the player device and a clamp fixing base 33 having the same shape as the turntable. The clamp fixing base 33 includes a flange portion 34,
A cylindrical disk positioning portion 35 smaller than the central hole 7 of the disk 6 having a tapered tip and a ring-shaped magnet 36 are provided on the upper surface of the disk positioning portion 35.

First, the positioning hole 11 of the lower half 2 is engaged with the pin 32 of the assembly jig 31, and the lower half 2 is set on the assembly jig 31. At this time, the opening 12 of the lower half 2
The flange portion 34 of the clamp fixing base 33 and the disc positioning portion 35 are inserted into the storage portion 5 of the lower half 2 through the above. Next, the center hole 7 of the disk 6 is transferred by using the transfer means.
Is inserted into the disc positioning portion 35, and the disc 6 is set on the flange portion 34. Since the tip of the disc positioning portion 35 is tapered, the center hole 7 of the disc 6 can be easily inserted into the disc positioning portion 35. Next, when the clamp 8 is brought closer to the clamp fixing base 33 from above by using the conveying means, the magnetic plate 9 of the clamp 8 is moved.
Is attracted to the ring-shaped magnet 36 at the tip of the disc positioning portion 35, and the clamp 8 is centered and fixed near the center of the disc positioning portion 35 with the disc 6 interposed therebetween.

Finally, when the upper half 1 is superposed on the lower half 2, the shaft 1 of the upper half 1 is inserted into the through hole 10 of the clamp 8.
8 is inserted without contact. Then, the upper half 1 and the lower half 2 are welded and fixed by ultrasonic welding, and the cartridge case 3 accommodating the disk 6 and the clamp 8 is completed. Then, the shutter 13 and the shutter spring are inserted from the side surface of the cartridge case 3 to complete the clamp-embedded cartridge of this embodiment.

As described above, according to this embodiment, in the clamp built-in type cartridge, the clamp 8 is held in the cartridge case 3 by the shaft 18 of the upper half 1 and the clamp 8.
Since it can be achieved by an extremely simple configuration with only the through hole 10 of FIG. 1, a circular opening for inserting the clamp and a stopper plate for preventing the clamp from coming off which covers the circular opening are not required in the upper half, and the number of parts of the cartridge is reduced. In the assembly, the step of adhering the retaining plate for preventing the clamp from coming off is unnecessary, and since the components can be inserted and incorporated from one direction with a simple assembly jig, the number of assembly steps can be greatly improved. in this way,
It is possible to inexpensively provide a clamp-embedded cartridge that achieves stable clamp performance.

(Embodiment 2) A clamp built-in type cartridge according to Embodiment 2 of the present invention will be described with reference to FIGS.
The same components as those in the first embodiment are designated by the same reference numerals,
Description is omitted.

As shown in the figure, in the clamp-embedded cartridge of this embodiment, the clamp 4 is attached to the inner surface of the upper half 1.
A recess 41 having a depth of 2 mm and allowing insertion of 2 is formed. The disc 6 and the upper half 1 are set so as to be separated from each other by 0.7 mm when the cartridge is mounted in the player device. The relationship between the disc 6 and the lower half 2 is 0.7 mm apart when the player device is mounted, as in the first embodiment. The height of the clamp 42 to which the magnetic plate 9 having no through hole is fixed is 2 m.
m has a cylindrical shape, and a part of the outer peripheral surface 43 thereof is in a state of being inserted into the recess 41 by 0.6 mm even when the upper half 1 and the clamp 42 are farthest apart as shown in FIG. .

The clearance between the clamp 42 and the recess 41 is
Similar to the first embodiment, when the cartridge is mounted on the player device, the clamp 42 is in the position where the clamp 42 can engage with the turntable 20 of the disc motor and the disc 6 is clamped. It is set to 2 mm so as not to contact. The height of the clamp 42 is 2 mm, which is lower than that of the clamp of the first embodiment. Therefore, the thickness of the cartridge case is 1 m as compared with the first embodiment.
It becomes thinner.

When the cartridge with built-in clamp of this embodiment is mounted on the player device, as shown in FIG.
As in the first embodiment, the disk 6 is surely placed on the turntable 2
Can be centered and fixed at 0.

The clamp built-in type cartridge of this embodiment can be assembled in the same process as that of the first embodiment.

Therefore, the clamp built-in type cartridge of this embodiment can be easily assembled and a thin clamp built-in type cartridge can be provided.

In this embodiment, the upper half is provided with a recess to serve as a clamp holding means. However, considering the ease of forming the upper half, it is desirable that the case has a uniform wall thickness.
In such a case, the upper half may have a uniform thickness, an annular protrusion may be formed on the inner surface of the upper half instead of the recess, and the clamp may be held in the space inside the annular protrusion.

(Embodiment 3) A clamp built-in type cartridge according to Embodiment 3 of the present invention will be described with reference to FIGS. The same components as those in the above-described first and second embodiments are designated by the same reference numerals, and the description thereof will be omitted.

As shown in the drawing, in the clamp-embedded cartridge of this embodiment, the clamp 51 made of synthetic resin to which the magnetic plate 9 having no through hole is fixed has a main body 52 having the same shape as that of the second embodiment and its outer periphery. Elastic claws 53 that can be elastically deformed in the height direction of the clamp are integrally formed in three parts. The spherical portion 54 at the end of the elastic claw 53 can contact the disk 6 and projects 0.5 mm from the main body 52 toward the disk 6. Therefore, the height of the clamp 51 is 2.5 mm when no stress is applied to the elastic claw 53. The elastic claw 53 can be easily elastically deformed, and for example, the clamp 51
When 30 g is pressed against the disk 6, the elastic claws 53 are each deformed by 0.5 mm, and the height of the clamp 51 becomes 2 mm. The concave portion 55 of the upper half 1 is 2 times larger than the outer diameter of the clamp 51.
mm larger and the depth is 1.5 mm. Ring magnet 2
The attraction force between the magnetic plate 3 and the magnetic plate 9 is 10 even if they are separated by 1.8 mm.
Since it is around 0 g, the clamp 51 can be sucked to the turntable 20 regardless of the elastic force of the elastic claw 53.

In the non-use state, as shown in FIG. 10, the disc 6 and the clamp 51 fall down by their own weight,
The spherical portion 54 of the elastic claw 53 of the clamp 51 contacts the disk 6, and the disk 6 contacts the lower half 2. In such a state, the clamp 51 and the upper half 1 are separated most. In this state, the height of the clamp 51 is 2.
5 mm, and the gap between the upper half 1 and the clamp 51 is 0.
It is 9 mm. Therefore, the clamp 51 is inserted into the recess 55 by 0.6 mm, and the clamp 51 is held at a position where it can engage with the turntable 20.

When the cartridge with built-in clamp of the present embodiment is mounted on the player device, the clamp 51 is sucked by the turntable 20, and the elastic claw 53 is attached to the disc 6.
When the clamp 6 is centered and fixed on the turntable 20, the height of the clamp 51 becomes 2 mm. At this time, the clearance between the clamp 51 and the upper half 1 is 0.
7 mm is secured, so the disc 6 and the clamp 5
1 does not contact the cartridge case 3.

As described above, in this embodiment, since the depth of the recess 55 of the upper case 1 can be made as thin as 1.5 mm, the clamp built-in cartridge can be made thinner than that of the second embodiment. .

Needless to say, the assembly of the clamp-embedded cartridge of this embodiment can also be carried out in the assembly process of the first embodiment.

In this embodiment, the elastic claw 53 is integrally formed of synthetic resin, but it may be formed of another member.

Further, in the present embodiment, as shown in FIG. 10, there is a gap between the disc and the clamp and the cartridge case in the non-use state, and the disc can be moved within the accommodation portion of the cartridge case. The protrusion amount of the elastic claw 53 of 51 may be increased, and the clamp 51 may contact the upper half and the disc 6 may be sandwiched between the lower half 2 and the elastic claw 53 of the clamp 51 in a non-use state. With this configuration, the disc and the clamp can be fixedly supported in the cartridge, rattling can be prevented in the cartridge of the disc and the clamp, and unpleasant contact noise and generation of shavings due to rubbing can be suppressed.

[0045]

As is apparent from the above description, according to the clamp built-in type cartridge and the assembling method thereof according to the present invention, the number of constituent parts of the cartridge is reduced and the parts can be inserted and incorporated from one direction by a simple assembling jig. As a result, the assembly man-hours can be greatly improved, and an inexpensive clamp built-in type cartridge can be provided.

Further, with the structure in which the upper half is provided with the concave portion and the structure in which the clamp is provided with the elastic claws, the clamp built-in type cartridge can be made thin and a clamp built-in type cartridge suitable for a thin type device can be provided.

Further, since the clamp and the disk can be fixedly supported on the cartridge case, unpleasant contact noise and generation of shavings due to rubbing can be suppressed and reliability is improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a clamp-embedded cartridge according to a first embodiment of the present invention.

FIG. 2 is an external perspective view of the clamp type cartridge according to the first embodiment.

FIG. 3 is a cross-sectional view taken along the line AA of the clamp-embedded cartridge of the first embodiment.

FIG. 4 is a cross-sectional view of a main part of the first embodiment of the cartridge with built-in clamp when the apparatus is mounted.

FIG. 5 is an assembly configuration diagram showing an assembly procedure of the clamp-embedded cartridge of the first embodiment.

FIG. 6 is an exploded perspective view of a clamp-embedded cartridge according to a second embodiment of the present invention.

FIG. 7 is a sectional view of an essential part of the clamp-embedded cartridge of the second embodiment.

FIG. 8 is a sectional view of an essential part of the second embodiment of the cartridge with built-in clamp when the device is mounted.

FIG. 9 is an exploded perspective view of a clamp-embedded cartridge according to a third embodiment of the present invention.

FIG. 10 is a cross-sectional view of the essential parts of the clamp-embedded cartridge of the third embodiment.

FIG. 11 is a sectional view of an essential part of the third embodiment of the cartridge with built-in clamp when the device is mounted.

FIG. 12 is a sectional structural view of a cassette with a built-in clamp of a first conventional example.

FIG. 13 is a sectional view of the first conventional example of the cassette with built-in clamp when the apparatus is mounted.

FIG. 14 is an external perspective view of a caddy with a clamp according to a second conventional example.

FIG. 15 is a plan view of a caddy with a clamp according to a second conventional example.

[FIG. 16] B- of the cassette with a built-in clamp of the second conventional example
B cross section

[Explanation of symbols]

 1 Upper half 2 Lower half 3 Cartridge case 5 Storage section 6 Disc 8 Clamp 9 Magnetic plate 10 Through hole 18 Shaft

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuki Nishino 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (7)

[Claims] 1. A cartridge in which a disc and a clamp having a magnetic plate are rotatably housed, wherein a cartridge case is composed of an upper half and a lower half, and the lower half is for rotating the disc. A disc motor turntable and an opening for allowing the pickup to be inserted are provided, and a clamp can be inserted into the inner surface of the upper half from the inner surface of the upper half. In the state of the cartridge case, the clamp can be engaged with the turntable. A clamp built-in cartridge which is provided with a clamp holding means for holding it at a predetermined position, and the clamp holding means is arranged at a position where it does not come into contact with the clamp when the disc is loaded on the turntable. 2. The clamp built-in apparatus according to claim 1, wherein the clamp holding means is a shaft that is erected on the inner surface of the upper half, and a hole that can be inserted into the shaft is formed at the center of the clamp. Type cartridge. 3. The clamp holding means is a recess or an annular protrusion provided on the inner surface of the upper half, and a part or all of the clamp is retained in the recess or the space inside the annular protrusion. Cartridge with built-in clamp described. 4. The clamp is capable of contacting a disc,
2. The cartridge with a built-in clamp according to claim 1, further comprising an elastic member that elastically deforms so that the height of the clamp is reduced when the clamp is engaged with the turntable. 5. A cartridge with a built-in clamp according to claim 4, wherein said disk is sandwiched between the lower half and the elastic member of the clamp and fixedly supported in the cartridge in the unclamped state. 6. The cartridge with a built-in clamp according to claim 4, wherein the clamp is made of a magnetic plate and a synthetic resin, and the elastic member is formed by integral molding of the synthetic resin. 7. A clamp fixing member with a magnet, which is mountable on a disc and engages with a clamp, is provided on a lower half provided with an opening for inserting a turntable of a disc motor for rotating the disc and a pickup. , A step of inserting from the opening and setting at a predetermined position, a step of placing the disk on a clamp fixing member with a magnet in the lower half,
The process of engaging a clamp with a magnetic plate with a clamp fixing member with a magnet by sandwiching the disc and sucking and fixing, and inserting the clamp from the inner surface of the upper half, and in the state of the cartridge case, the clamp can be engaged with the turntable. A method of assembling a cartridge with built-in clamp, which comprises a step of stacking an upper half having a clamp holding means for holding it at a predetermined position on the lower half to form a cartridge case.