JP3216308B2 - Disk cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge for rotatably storing a disk-shaped recording medium such as an optical disk capable of recording information signals such as tone signals and video signals.

[0002]

2. Description of the Related Art Generally, a disk cartridge containing a disk-shaped recording medium such as an optical disk capable of recording an information signal such as a musical sound signal or a video signal, as shown in FIGS. A cartridge body 1 is formed by combining a pair of upper and lower halves 2 and 3 formed of a synthetic resin material, and an optical disc 4 is rotatably housed inside the cartridge body 1. At the center in the left-right direction of the main surfaces of the upper and lower halves 2 and 3 constituting the cartridge main body 1, at least a part of the signal recording area of the stored optical disk is exposed to the outside over the inner and outer circumferences. An opening (not shown) is provided.

In the case of such a disc cartridge, if dust entering from the recording / reproducing opening adheres to or scratches the surface of the optical disc 4, it becomes impossible to record and read information signals. A shutter member 5 movably attached to the cartridge body 1 to open and close the recording / reproducing opening is provided.

The shutter member 5 is formed by punching and bending a thin metal plate.
Shutters for opening and closing the recording / reproducing openings, respectively, and a connecting portion 5A for connecting the base ends of the shutters.
And is formed in a substantially U-shaped cross section as a whole. As shown in FIG. 7, a shutter closing member engaging hole 6 with which a shutter closing member 10 described later is engaged is formed in the connecting portion 5A extending along the side surface portion 1A on the front side of the cartridge body 1. In addition, a slide guide portion 7 having a U-shaped cross section for guiding the shutter member 5 so as to be able to move in parallel along the side surface portion 1A is provided in a protruding manner.

[0005] The shutter member 5 is arranged such that each shutter portion extends above the recording / reproducing opening, and the cartridge main body 1 is provided.
And is movably assembled to the cartridge body 1 between a closed position for closing the recording / reproducing opening and an open position for opening. The shutter member 5 is moved from the opening closing position to the opening opening position when the disk cartridge is inserted into the cartridge mounting portion of the recording / reproducing apparatus.

That is, a shutter opening member 8 is provided in the cartridge mounting portion of the recording / reproducing apparatus, and a shutter opening member entry groove 9 into which the shutter opening member 8 enters is provided in the side surface portion 1A of the cartridge body 1. When the disc cartridge is inserted into the cartridge mounting portion, the shutter opening member 8 is engaged with the side end of the slide guide portion 7 of the shutter member 5. When the disk cartridge is still inserted into the cartridge mounting portion, the shutter opening member 8 moves the shutter member 5 from the opening closing position to the opening opening position.

On the other hand, the cartridge mounting portion of the recording / reproducing apparatus is provided with a shutter closing member 10 which enters the shutter opening member entrance groove 9 like the shutter opening member 8. The shutter closing member 10 is formed of a synthetic resin material, and moves the shutter member 5 relative to the cartridge main body 1 when the disk cartridge mounted on the cartridge mounting portion is ejected by an ejecting operation. Move to the opening closing position.

That is, when the disc cartridge is inserted into the cartridge mounting portion, the shutter closing member 10 having elasticity enters the shutter opening member entry groove 9 as shown in FIG. 7
Abuts on the side end 7a, but rides on the surface of the slide guide portion 7 by its elasticity. When the disc cartridge is further inserted into the cartridge mounting portion, the disc cartridge engages with the shutter closing member engaging hole 6 formed in the connecting portion 5A of the shutter member 5 moved to the opening position by the shutter opening member 8.

[0009]

Generally, the shutter member 4 is formed of a roll-shaped metal thin plate as a material, and an outer shape extracting step for forming an outer shape in a substantially expanded state. 7 and a cutting step of cutting off the shutter members that are continuously formed one by one. The shutter member 5 has a product splicing portion 11 that acts so that the product is continuously conveyed and is cut off in the final cutting step.

The product joint portion 11 of the conventional shutter member 5 is provided at a side end portion 7a of the slide guide portion 7 which is a product end portion in a manufacturing process. In order to eliminate the influence of burrs, as shown in FIG. Therefore, the slide guide portion 7
A sharp edge portion 7c is formed at the side end portion 7a by the step-down portion 7b, and the edge portion 7c contacts the tip end portion of the shutter closing member 10.

As described above, the side end portion 7 of the slide guide portion 7 of the shutter member 5 formed of a metal plate material.
a, a shutter closing member 10 formed of a synthetic resin material comes into contact with the shutter closing member 10 and gets up.
The tip portion of 0 is gradually cut by the edge portion 7c.
For this reason, the shutter closing member 10 is
Of the slide guide portion 7 is not carried out, and the disk cartridge is not completely mounted on the cartridge mounting portion.

According to the present invention, a portion of the side end portion of the slide guide portion where the product joint portion of the shutter member comes into contact with the shutter closing member is formed in a flat shape.
An object of the present invention is to provide a disk cartridge in which a shutter closing member is prevented from being damaged and a shutter closing member can be reliably operated.

[0013]

A disk cartridge according to the present invention proposed to achieve the above-mentioned object has a disk-shaped recording medium rotatably housed therein, and has at least a main surface of the disk-shaped recording medium. A cartridge body having a recording / reproducing opening partly facing outward in the radial direction and a shutter opening member entrance groove formed in a front side surface part; and a shutter for opening and closing the recording / reproducing opening part And a connecting portion extending along the front side surface portion of the cartridge body and having a shutter closing member engaging hole formed therein, and a slide guide portion integrally projecting from the side of the connecting portion. And a shutter member having a U-shaped cross section. A shutter member attached to the disk cartridge is moved in a direction of opening the recording / reproducing opening by a shutter opening member which enters the shutter opening member entry groove by an insertion operation into the cartridge mounting portion of the recording / reproducing apparatus. The slide guide, which is moved in a direction to close the recording / reproducing opening by the shutter closing member engaged with the shutter closing member engaging hole by an eject operation, and a product joining portion of the shutter member is formed. The contact portion of the portion side end with the shutter closing member has a flat shape, and a portion other than the contact portion is a connecting surface of the product joining portion.

[0014]

When the disk cartridge according to the present invention is inserted into the cartridge mounting portion of the recording / reproducing apparatus, the shutter closing member provided on the recording / reproducing apparatus enters the shutter opening member entrance groove, and the slide guide section of the shutter member. And then ride on the surface of the slide guide. At the side end of the slide guide portion of the shutter member with which the shutter closing member abuts, a shutter member formed through a continuous manufacturing process of a metal plate material through an outer shape removing process, a bending process, and a cutting process is connected between the processes. The product spliced part which is conveyed and separated in the final cutting step is provided in a step-down manner. The side end portion of the slide guide portion has a flat contact portion so that the edge portion formed by the stepped portion and the shutter closing member are not in contact with each other. Scratches are prevented. The shutter member is placed in a state where it is connected to each other during the manufacturing process, with a portion other than the contact portion serving as a product joining portion.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a disk cartridge according to the present invention has a cartridge body 20 formed by combining a pair of upper halves 21 and lower halves 22 each having a rectangular shape formed of a synthetic resin material. And the cartridge body 2
An optical disk 23, which is a disk-shaped recording medium, is rotatably accommodated in the disk. On the outer periphery of the upper and lower halves 21 and 22, rising peripheral walls 24a and 24b which abut against each other and constitute the outer peripheral wall 24 of the cartridge body 20 are respectively erected, and the upper and lower halves 21 and 22 are opposed to each other. On the inner surface of the disk, the disk storage portion forming walls 25a, 25b formed as arcuate walls inscribed with the rising peripheral walls 24a, 24b and abutting each other to form a disk storage portion, and a plurality of butt fitting projections 26a, 26b. And are respectively erected.

The upper and lower halves 21 and 22 are provided on each of the rising peripheral walls 2.
4a, 24b and the respective walls 25a, 25
b, and are assembled by fitting the butting fitting projections 26a and 26b together and by ultrasonic welding or the like to constitute the cartridge body 20.

A substantially central portion of the lower half 3 has a circular opening 27.
When the disc cartridge is mounted on the recording / reproducing apparatus, the opening 27 is opened.
The recording / reproducing apparatus which drives the optical disk 23 accommodated in the optical disk 23 functions as a disk entry opening through which a disk table enters. The disk entry opening 27 is, specifically, the optical disk 2 housed in the cartridge body 20.
The metal plate 28 for magnet clamp provided by closing the center hole of No. 3 is exposed outward.

The upper and lower surfaces of the cartridge body 20, that is, upper and lower halves 21 and 22, are provided with at least a part of the signal area of the optical disk 23 rotatably housed in the disk housing part over the inner and outer circumferences. The recording / reproducing openings 29a and 29b facing each other are opened opposite to each other. As shown in FIG. 1, the recording / reproducing openings 29a and 29b extend from a position close to the disk entry opening 27 to the front side of the cartridge main body 20.
0, and is formed in a rectangular shape at substantially the center in the left-right direction.

FIG. 2 shows a front side of the cartridge body 20.
As shown in FIG. 7, a shutter opening member entry groove 31 into which a shutter opening member 30 disposed on the recording / reproducing apparatus side for moving a shutter member 35 described later enters is formed.
The shutter opening member entrance groove 31 is
Has an open end 32 on one side surface orthogonal to the front surface of the shutter member 35 and is formed in the moving direction of the shutter member 35. A shutter slide guide wall 33 is provided upright on the inner surface of the lower half 22 to ensure stable operation of the shutter member 35 in the shutter opening member entrance groove 31.

The upper half 21 has an abutting wall 34 standing upright. The butting wall 34 is brought into contact with the inner surface of the lower half 22 on the inner surface on the front edge side of the recording / reproducing opening 29 to prevent the thickness of the cartridge body 20 in the shutter opening member entrance groove 31 in the thickness direction.

In order to prevent dust and the like from entering the cartridge body 20 through the recording / reproducing openings 29a and 29b and sticking to the optical disk 23 stored therein,
Shutter member 3 for opening and closing recording / reproducing opening 29
5 is assembled. As shown in FIG. 1, a shutter member 35 formed by a continuous manufacturing process described later includes shutter portions 36a and 36b for opening and closing the recording / reproducing openings 29, respectively, and base ends of the shutter portions 36a and 36b. And a first slide guide portion 38 and a second slide guide portion 39 projecting from both sides of the connection portion 37, respectively, and are formed to have a U-shaped cross section. I have.

As shown in FIG. 3, the connecting portion 37 is provided with a shutter closing member engaging hole 40 in which a shutter closing member 50 to be described later is engaged at a substantially central portion thereof. The slide guides 38 and 39 have a U-shaped cross section having a height substantially corresponding to the height of the front side of the lower half 22, and the shutter member 35 is arranged in parallel along the front side of the cartridge body 20. Guide to stable movement. As shown in FIG. 2, when the shutter member 35 is attached to the cartridge main body 20, the distal end of the first slide guide portion 38 is inserted into the shutter opening member entry groove 31 formed on the front side of the cartridge main body 20. In addition, an engagement piece 41 that relatively engages with a shutter lock member 45 disposed in the cartridge body 20 described below is bent.

First and second slide guides 38, 39
The shutter member 35 fitted to the cartridge body 20 so as to sandwich the front side of the lower half 22
Are mounted on the cartridge body 20 movably over two positions: a closed position at which the recording / reproducing opening 29 is closed by the shutter 36, and an open position at which the recording / reproducing opening 29 is opened.

The shutter member 3 of the cartridge body 20
A shutter slide recess 42 having a depth substantially equal to the plate thickness of the shutter member 35 is provided in a region extending from the peripheral edge of the recording / reproducing openings 29a and 29b to which one side moves and a region extending from the front surface side of the cartridge body 20. Are formed.
The shutter slide recess 42 allows the shutter member 35 to be mounted flush with the surface of the cartridge main body 20 as shown in FIG. 2, and prevents the shutter member 35 from being increased in thickness by being mounted on the cartridge main body 20. Have been.

As shown in FIG. 1, a shutter lock member 45 is provided in the cartridge body 20 for holding the shutter member 35 in the closed position where the recording / reproducing openings 29a and 29b are closed. Shutter lock member 4
Reference numeral 5 denotes a pivotal support 46 which is formed of a synthetic resin material, and has a base end portion provided with an insertion hole to be inserted into a support shaft 43 erected on the inner surface of the lower half 22 constituting the cartridge body 20. A lock arm 48 provided with an engagement recess 47 with which an engagement piece 41 formed on the shutter member 35 is relatively engaged.
And an elastic displacement portion 49 integrally extended from the pivotal support portion 46 so as to face the lock arm portion 48.

An erroneous recording prevention member 44 having an overall E-shape is provided at a corner diagonally to the corner where the support shaft 43 of the lower half 22 is erected. The erroneous recording prevention member 44 enables or disables recording of an information signal on the optical disk 23 by being switched to the first and second positions along the lower half 22.

As described above, the shutter lock member 45 provided at one corner of the lower half 22 has the lock arm 47 extending along the shutter opening member entrance groove 31 formed on the front side of the cartridge body 20. Extending
As a result, the engagement concave portion formed at the top of the lock arm portion 47 faces the shutter opening member entry groove 31, and the shutter member 3 sliding on the front side of the cartridge body 20.
5 can be relatively engaged with the engagement piece 41. Then, in the normal state, the engagement member 41 is engaged with the engagement concave portion of the shutter lock member 45 in the normal state.
The recording / reproducing opening 29 is held in a locked state at the closed position where the opening is closed.

When the above-described disc cartridge is inserted into a cartridge mounting portion provided with a cartridge holder or the like provided in the recording / reproducing apparatus in accordance with an insertion direction indication mark provided on the upper surface of the cartridge main body 20, the front side of the cartridge main body 20 Shutter opening / closing member entry groove 3 formed
The shutter opening member 30 provided on the recording / reproducing apparatus side enters from the open end 32 of the recording medium. With the insertion of the disc cartridge into the disc mounting portion of the recording / reproducing device, the shutter release member 30 rides from the base end outer surface of the lock arm portion 47 of the shutter lock member 45 toward the tip end, and the lock arm portion 47 for the cartridge body 2
Press inward of zero.

When the lock arm 47 is in the cartridge body 2
When the shutter lock member 45 is pressed inward, the shutter lock member 45 rotates counterclockwise in FIG. 1 around a pivot 46 that is pivotally supported by the support shaft 43. The rotation of the shutter lock member 45 causes the shutter member 35 to rotate.
When the engagement piece 41 is disengaged from the engagement concave portion of the shutter lock member 45, the movable piece becomes free to move. After the shutter member 35 is freely movable, when the disc cartridge is further inserted into the cartridge mounting portion, the shutter member 35 is pressed by the shutter opening member 30 while the recording / reproducing openings 29a, 29
The recording / reproducing opening 29 of the cartridge body 20 by the shutter 36 is gradually opened.

The shutter member 35 has a recording / reproducing opening 29
When the shutter release member 30 is moved to the position where the shutter release member 30 is completely released, the pressing operation of the lock arm portion 47 by the shutter release member 30 is released, and the shutter lock member 45 rotates around the pivot 46 in the clockwise direction in FIG. After the movement, the engagement concave portion faces the shutter opening member entrance groove 31.

When the recording / reproducing opening 29 of the shutter member 35 is closed, the shutter closing member 50 is engaged with the shutter closing member engaging hole 40 formed in the connecting portion 37 of the shutter member 35. That is, when the disk cartridge is inserted into the cartridge mounting portion, the shutter closing member 50 provided on the recording / reproducing apparatus side enters from the open end 32 of the shutter opening / closing member entrance groove 31 formed on the front side of the cartridge main body 20.

With the insertion of the disk cartridge into the disk mounting portion of the recording / reproducing device, the closing member 50 is closed.
Abuts against the side end 51 of the first slide guide portion 38 of the shutter member 35. The shutter closing member 50 has elasticity, and rides on the surface of the slide guide portion 38 while being displaced elastically with the insertion of the disk cartridge.
At the position where a and 29b are closed, it engages with the shutter closing member engaging hole 40 of the shutter member 35.

When the recording / reproducing operation is completed and the disc cartridge is ejected, the shutter member 35
Is relatively moved with respect to the cartridge body 20 by the shutter closing member 50 engaged with the shutter closing member engaging hole 40. The shutter member 35 moved to the position where the recording / reproducing opening 29 is opened by pulling out the disk cartridge from the disk mounting portion is held by the shutter lock member 45 which has been rotated to the recovery position.

As shown in FIG. 5, the shutter member 35 is formed by a continuous manufacturing process using a thin metal roll plate as a material. That is, in the metal plate 60 to be supplied to the manufacturing process, the first intermediate member 61 having the outer shape in the expanded state of the shutter member 35 is formed in the outer shape removing step A which is the first step. This first intermediate member 6
In the second bending step B, the connecting portion 35
The shutter portion 36 and the first and second slide guide portions 38 and 39 are subjected to a bending step of bending the portions in the right-angle direction, and the second intermediate member 62 has a substantially U-shaped overall shape. Is formed. Further, in the third cutting step C, each product 63 is formed by separating from the product splicing portion 64.

Here, the product splicing section 64 is provided for continuously transporting the product during the manufacturing process.
When cutting the product joint 64 in the final process,
Since burrs, burrs, and the like are generated on the cut surface, as shown in FIG. 4, the first slide guide portion 38 is formed in a step-down portion 51 a which is stepped down by L for the side end portion 51. I have. A protruding portion protruding from the step-down portion 51a to the side corresponding to L, in other words, a portion contacting the shutter closing member 50 is configured as a shutter closing member contact portion 51b, and portions other than the contact portion 51b are formed. As shown in FIG. 5, a connecting surface 65 of the product joint 64 is formed.

The dimension M in the height direction of the shutter closing member contact portion 51b is set so that M> N with respect to the width N in the height direction of the shutter closing member 50. Therefore, the sharp corner portion 51c formed between the step-down portion 51a and the shutter closing member contact portion 51b contacts the shutter closing member 50 contacting the side end portion 51 of the first slide guide portion 38. Not configured. In other words, the contact portion of the side end portion 51 of the first slide guide portion 38 with which the shutter closing member 50 contacts is formed in a flat shape.

Since the side end 51 of the first slide guide portion 38 of the shutter member 35 is configured as described above, the shutter opening member enters when the disc cartridge is mounted on the cartridge mounting portion of the recording / reproducing apparatus. When the shutter closing member 50 entering the groove 31 comes into contact and performs a climbing operation, the shutter closing member 50 operates reliably without being damaged by the corner portion 51c.

In the above embodiment, the present invention is applied to the optical disk 2
An example in which the present invention is applied to a disk cartridge containing the cartridge 3 is shown, but a movable shutter member for opening and closing a recording / reproducing opening formed in the cartridge body is provided, and the shutter member is closed with the recording / reproducing opening. The present invention can be widely applied to a disc cartridge provided with a shutter closing member for moving the shutter from the open state to the open state.

[0040]

As described above, the disc cartridge according to the present invention is provided with a step-down portion for forming a product joining portion between products when the disc cartridge is formed by a continuous process, and uses the shutter member for recording / reproducing. The shutter guide member, which moves the opening to the open state from the closed state to the open state, is brought into contact with the slide guide portion, and the side end portion of the slide guide portion is brought into contact with the shutter closing member. Part other than the part as the connecting surface of the product joint,
When the shutter closing member abuts and performs a climbing operation, the shutter closing member is prevented from being damaged by the corner portion formed by the step-down portion, and the shutter closing member is caught on the side end of the slide guide portion. It does not occur and can operate reliably.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a disk cartridge according to the present invention.

FIG. 2 is a perspective view of the disk cartridge as viewed from above.

FIG. 3 is a front view of the disk cartridge.

FIG. 4 is an enlarged front view of a main part showing a shutter closing member contact portion of a shutter member provided in the disk cartridge.

FIG. 5 is a diagram illustrating a continuous manufacturing process of a shutter member.

FIG. 6 is a plan view of a conventional disk cartridge.

FIG. 7 is a front view of a conventional disk cartridge.

FIG. 8 is an enlarged front view of an essential part for explaining a shutter closing member contact portion of a shutter member provided in a conventional disk cartridge.

[Description of Signs] 20 Cartridge main body, 23 Optical disk, 31
Shutter opening member entry groove, 35 shutter member,
38 slide guide portion, 40 shutter closing member engaging hole, 51 shutter closing member side end, 51a
Step drop portion, 51b Shutter closing member contact portion, 51
c Corner, 64 product joint, 65 connecting surface

Claims (1)

(57) [Claims] 1. A disc-shaped recording medium is housed rotatably, recording reproducing apertures for exposing outward over at least a portion in the radial direction of the recording medium to the main surface is formed Rutoto
A cartridge body shutter opening member entry groove is formed on the monitor front side portion, and a shutter portion for opening and closing the recording reproducing apertures, the shutter closing member engaging with extending along the front side surface portion of the cartridge body a connecting portion which Goana is bored, and a shutter member having a U-shaped section comprising a slide guide portion extending integrally on the side of the connecting portion, said shutter member is a recording and reproducing apparatus while being moved to a position direction by a shutter opening member which enters the shutter opening member entry groove by insertion operation into the cartridge mounting portion to open the recording reproducing apertures, the shutter closure member engaging hole by eject operation closing the recording reproducing apertures by the shutter closing member to be engaged
Is moved to the position direction of the contact portion between the shutter closing member of the slide guide portion side end product joints of the shutter member is formed as a flat shape, other than the contact portion
A disc cartridge characterized in that the part (1) is a connecting surface of the product joint .