JPH0636494A - Disk cartridge - Google Patents

Abstract

PURPOSE:To smoothly operate a shutter locking member for holding a shutter member attached to a cartridge main body on an opening part closing position. CONSTITUTION:A cartridge main body 34 is provided with a shutter locking member supporting piece 69 constituting a space between a cartridge main body 34 surface and the side surface of a shutter locking member 47 facing the rotative area of the shutter locking member 47 and an ejecting pin projection part for projecting the ejecting pin of a molding die is provided between the supporting wall of this shutter locking member 47 and the supporting shaft of the shutter locking member 47, as well. Thus, a touching resistant area between the cartridge main body surface and the shutter locking member is reduced, the shutter is smoothly operated and a damage by burrs generated on the ejecting pin projecting part to the operation of the shutter locking member is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge which rotatably accommodates a disc-shaped information recording medium such as an optical disc capable of recording information signals such as tone signals and video signals, and particularly to information signal recording. The present invention relates to a disc cartridge having a shutter lock mechanism that holds a shutter member that opens and closes a reproducing opening at an opening closed position.

[0002]

2. Description of the Related Art Generally, in an information recording / reproducing apparatus for a disc-shaped information recording medium such as an optical disk capable of recording an information signal such as a tone signal or a video signal, dust adheres to the surface of the information recording medium. If it is scratched or scratched, the signal cannot be read. For this reason, the disk cartridge rotatably accommodates an information recording medium in a rectangular cartridge body, and the cartridge body has an opening for recording / reproducing an information signal and this opening at all times. A shutter member that is closed and a shutter lock member that holds the shutter member in the opening closed position are provided.

Conventionally, there has been proposed a disk cartridge having a shutter lock member as shown in FIGS. 5 and 6, for example. This conventional disc cartridge is a combination of an upper half 2 and a lower half 3 which are square shallow plates.
The cartridge main body 4 is configured, and the optical disc 1 is rotatably housed therein.

When the disc cartridge is mounted on the information recording / reproducing apparatus, the lower half 3 has a substantially central portion thereof.
A disc table entry portion 5 into which a disc table of an information recording / reproducing apparatus for rotating the optical disc 1 built in the trunk body 4 enters is provided. Also, the top and bottom
A portion of the signal recording area of the optical disc 1 is exposed to the outside on the flaps 2 and 3 from the position close to the disc table entry portion 5 to the front side of the cartridge body 4. The rectangular information signal recording / reproducing openings 6 and 7 are provided respectively.

A shutter member 8 is attached to the cartridge body 4 to prevent dust and the like from entering and to protect the optical disc 1. The shutter member 8 is formed by bending a thin metal plate into a substantially U shape, and has shutter portions 8a and 8b for opening and closing the information signal recording / reproducing openings 6 and 7, respectively, and these shutter portions. 8a, 8
It is composed of a connecting piece 8c for connecting the base end side of b.

A guide portion 9 is provided on one side of the connecting piece 8c for guiding the shutter member 8 so as to move in parallel along the front surface side of the cartridge body 4, and a part of the guide portion 9 is provided. The engaging piece 10 is provided by bending inward.

On the front side of the cartridge body 4, there is provided a shutter opening member insertion groove 18 with which a shutter opening member 20 (see FIG. 6) arranged at the cartridge insertion portion of the information recording / reproducing apparatus is engaged. The shutter member 8 extends over the shutter opening member insertion groove 18 so that the shutter members 8a and 8b extend over the information signal recording / reproducing openings 6 and 7, respectively. It is movably attached to the front side of the trunk body 4.

A shutter member 8 is provided at one of the corners A on the front side of the lower half 3 and has openings 6 and 7 for recording / reproducing information signals.
A shutter lock member 11 that holds the shutter at a position to close the shutter is provided. The shutter lock member 11 is formed of a synthetic resin material, and is formed in a thin shape from one end of a base portion that is the mounting portion 12, and is curved through an elastic displacement portion 15 that is elastically displaceable. The frame portion 13 is extended. An engaging concave portion 14 that is relatively engaged with the engaging piece 10 of the shutter member 8 is provided at the top of the lock arm portion 13 on the outer surface side.

The shutter lock member 11 has a pair of mounting holes in which the through holes 17, 17 formed in the mounting portion 12 are erected on the lower half 3 such that the engaging recess 14 faces the front surface of the cartridge body 4. It is attached to the inner surface of the lower half 3 by fitting the pins 16 and 16. The shutter lock member 11 has an engagement recess 14 that engages with the engagement piece 10 of the shutter member 8 in a state in which the shutter member 8 is set and operated to close the information signal recording / reproducing openings 6 and 7. The shutter member 8 is held in the locked state by the relative engagement.

When the disk cartridge is inserted into the cartridge mounting portion of the information recording / reproducing apparatus, the shutter opening member on the information recording / reproducing apparatus side is inserted into the shutter opening member insertion groove 18 recessed in the front side of the cartridge body 4. 20 engages.
When the disc cartridge is pushed further into the cartridge mounting portion, the shutter opening member 20 rides from the outer surface of the lock arm portion 13 of the shutter lock member 11 toward the tip end side toward the tip end side. Then, the lock arm portion 13 is pressed inwardly of the cartridge body 4 while elastically displacing the elastic displacement portion 15.

As a result, the engagement piece 1 of the shutter member 8
0 and the engagement recess 14 of the shutter lock member 11 are released, and the shutter member 8 is pushed by the shutter opening member 20 and moved in a direction to open the information signal recording / reproducing openings 6, 7. . Although detailed description is omitted, the shutter member 8 performs an eject operation and a withdrawal operation to remove the disc cartridge from the cartridge mounting portion of the information recording / reproducing apparatus, thereby forming an information signal recording / reproducing opening. Return to the initial position where 6 and 7 are closed.

[0012]

By the way, the upper and lower halves 2 and 3 are made of synthetic resin, but as described above, the shutter lock member 11 is one of the front halves of the lower harf 3. Since the corner portion A is provided with the mounting pins 16, 16 of the shutter lock member 11 and the like, the corner portion A is also provided in the corner portion A. It is preferable to arrange a protrusion of the eject pin for ejecting the molded product from the cavity.

However, when molding is completed and the eject pin is abutted against the molded product, burrs are generated on the surface of the molded product. Therefore, due to the burr caused by the abutment of the eject pin generated on the surface of the corner portion A of the lower half 3,
There is a possibility that the shutter lock member 11 arranged in the corner portion A may be caught and hinder the operation thereof.

By providing the above-mentioned shutter member and shutter lock member, dust and the like from the outside can be prevented from entering the cartridge main body 4, but this shutter lock is performed every time the shutter lock member 11 operates. The member 11 has a lower half 3 due to the eject pin of the molding die.
There is also a risk that the burrs generated on the surface of the cartridge will be scraped and the scraps will adhere to the optical disk 1 housed in the cartridge body 4.

Further, when the shutter lock member 11 is assembled to the lower half 3, if the entire side surface of the shutter lock member 11 slides on the surface of the lower half 3, the sliding resistance is increased. Shutter lock member 11
May not operate smoothly.

Therefore, according to the present invention, the eject pin of the molding die also projects at one of the corners on the front surface side of the lower half, which is provided with a support shaft for pivotally supporting the shutter lock member. When the section is provided, the shutter lock member operates smoothly without being affected by the burr generated by the ejection pin ejection, and the shutter member and the shutter lock member securely protect the optical disc housed in the cartridge body. It has been proposed for the purpose of providing an obtainable disk cartridge.

[0017]

DISCLOSURE OF THE INVENTION A disk cartridge according to the present invention, which has achieved this object, accommodates a disc-shaped information recording medium rotatably and at least a part of the information recording medium in a radial direction. A cartridge main body having an information signal recording / reproducing opening that is exposed to the outside,
A shutter member movably attached to the cartridge body to open and close the information signal recording / reproducing opening, and a shutter rotatably supported by a support portion provided on the cartridge body to hold the shutter member at the opening closed position. And a shutter lock member for controlling the shutter lock member, and one corner portion on the front surface side of the cartridge main body in which the shutter lock member is disposed, facing the rotation region of the shutter lock member, with the surface of the cartridge main body. A shutter lock member support piece that forms a gap with the side surface of the shutter lock member is integrally erected, and an eject pin of a molding die projects between the support portion of the shutter lock member and the shutter lock member support piece. The eject pin protrusion is provided.

[0018]

According to the present invention, the shutter lock member supporting piece holds the shutter lock member at a predetermined height position from the surface of the cartridge main body, and the contact resistance between the surface of the cartridge main body and the shutter lock member. The area is reduced so that the shutter lock member operates smoothly, and the influence of burrs on the shutter lock member on the surface of the cartridge body due to the eject pin of the molding die is eliminated.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. First, as shown in FIG. 1, a disc cartridge having a shirt turret mechanism according to the present invention is constructed by assembling a substantially shallow dish rectangular upper half 32 and a lower half 33 formed of a synthetic resin material. Cartridge body 34
An optical disk 31 which is a disc-shaped information recording medium is rotatably accommodated in the cartridge body 34.

On the outer peripheries of the upper and lower halves 32 and 33, rising peripheral walls 35a and 35b, which are abutted against each other and constitute an outer peripheral wall 35 of the cartridge main body 34, are erected. A plurality of disc storage portion forming walls 36a and 36b, which are formed as arc walls inscribed in the rising peripheral walls 35a and 35b and abut each other to form a disc storage portion, are formed on opposing inner surfaces of the halves 32 and 33. Butt fitting projections 37a and 37b are respectively provided upright.

Therefore, the upper and lower halves 32 and 33 are assembled by associating the rising peripheral walls 35a and 35b and the disc storage portion forming walls 36a and 36b with each other, and the butt fitting protrusions 37a and 37b are fitted with each other. They are integrated with each other by ultrasonic welding or the like to form the cartridge main body 34.

A circular opening 3 is formed in the substantially central portion of the lower half 33.
8 is opened, and when the disc cartridge is mounted on the information recording / reproducing apparatus, the disc table of the information recording / reproducing apparatus for driving the optical disc 31 housed in the cartridge main body 34 is inserted into the opening 38. Function as an opening for disc entry. This disc entry opening 3
Specifically, 8 is a metal plate 31a for a magnet clamp, which is provided by closing the center hole of the optical disc 31 housed in the cartridge main body 34, to the outside.

On the upper and lower surfaces of the cartridge main body 34, that is, the upper and lower halves 32 and 33, an information signal for exposing at least a part of the signal area of the optical disk 31 housed outside over the inner and outer circumferences. The recording / reproducing openings 39, 40 are provided so as to face each other, and the information signal recording / reproducing openings 39, 40 are located at positions close to the disc entry opening 38, as shown in FIG. It is formed in a rectangular shape across the front surface of the cartridge main body 34 and substantially at the center in the left-right direction of the cartridge main body 34.

A shutter opening member insertion groove 42 into which a shutter opening member 71 (see FIG. 3) arranged on the recording / reproducing device side for moving a shutter member 41, which will be described later, enters is formed on the front surface side of the cartridge main body 34. Has been formed.

This shutter opening member insertion groove 42 is shown in FIG.
As shown in FIG. 5, the cartridge main body 34 has an opening end 42 a on one side surface orthogonal to the front surface and is formed in the moving direction of the shirt member 41. A shutter slide guide wall 43, which is provided upright on the inner surface of the lower half 33, is provided in the shirt opening member insertion groove 42 in order to ensure stable operation of the shutter member 41.

A butt wall 44 is provided upright on the upper half 32. The butt wall 44 has a lower half 33 on the inner side surface of the information signal recording / reproducing opening 39 on the front edge side. It is abutted against the inner surface to prevent the cartridge main body 34 from bending in the thickness direction at the shutter opening member insertion groove 42 portion.

In order to prevent dust and the like from entering the cartridge main body 34 through the information signal recording / reproducing openings 39, 40 and adhering to the stored optical disc 31, the information signal recording / reproducing is performed. A shutter member 41 that opens and closes the openings 39 and 40 is assembled. The shutter member 41 is formed by pressing a thin metal plate, and has shutter portions 41a and 41b for opening and closing the information signal recording / reproducing openings 39 and 40, respectively, and the bases of these shutter portions 41a and 41b. Connecting piece 41 for connecting the end sides
It consists of c and has a U shape as a whole.

At both ends of the connecting piece 41c of the shutter member 41, the shutter member 41 has a U-shaped cross section having a height substantially corresponding to the height of the lower half 33 on the front surface side. First and second slide guide portions 45 and 46 are provided so as to be guided along the front side so as to be stably moved in parallel. When the shutter member 41 is attached to the cartridge body 34 at the tip end side of the first slide guide portion 45, the shutter member 41 is inserted into the shirt opening member insertion groove 42 formed on the front side of the cartridge body 34, and An engagement piece 48 that is relatively engaged with a shutter lock member 47 provided in a cartridge main body 34 described later is formed by bending.

First and second slide guide portions 45, 46
A shutter member 41 fitted and arranged in the cartridge main body 34 so as to sandwich the front side of the lower half 33 by the
Is attached to the cartridge body 34 so as to be movable between two positions, a closed position for closing the information recording / reproducing openings 39, 40 and an open position for opening. The shutter member 41 is provided in a region of the cartridge main body 34 extending from the periphery of the information signal recording / reproducing openings 39, 40 in which the shutter member 41 moves to one side surface and in a region extending to the front surface side of the cartridge main body 34. A shutter slide recess 52 having a depth substantially equal to the plate thickness of the shutter body 41 is formed by the shutter slide recess 52.
It is possible to assemble the same as the surface of the shutter body 41, and it is possible to prevent an increase in thickness due to the shutter member 41 being assembled to the cartridge body 34.

The cartridge body 34 is provided with a shutter lock member 47 for holding the assembled shutter member 41 at the closed position where the information signal recording / reproducing openings 39, 40 are closed. The shutter lock member 47 is made of a synthetic resin material and has a cartridge main body 34 at its base end.
Of the lower halves 33 constituting the above-mentioned structure, the pivotal support portion 57 having the insertion hole 56 inserted into the support shaft 55 erected on the inner surface of the lower half 33 and the engagement piece 48 formed on the shutter member 41 are engaged with each other. A lock arm portion 59 having a recess 58 and the lock arm portion 59.
The elastic displacement portion 60 is integrally extended from the pivot portion 57 so as to face the cam portion 59.

A lock door of the shutter lock member 47.
The cam portion 59 is formed in a substantially V shape such that the central portion bulges, and the shutter member 41 is provided at the top of the central bulge portion.
An engaging recess 58 is formed to be engaged with the engaging piece 48 formed in 1. On the base end side of the lock arm part 59 of the shutter lock member 47, as shown in FIG. 4, a part of the other side of the lock arm part 59 from the tip to the base end is thinly cut out. A rotation position regulation step 61 is formed.

When the shutter lock member 47 is attached to the cartridge main body 34, the rotation position regulating step 61 is formed on the inner surface of the lower half 33 which constitutes the cartridge main body 34, which will be described later. Lock member rotation restricting wall 66
Is engaged with the shutter lock member 47 to regulate the rotational position of the shutter lock member 47. Elastic displacement portion 6 of shutter lock member 47
An abutting portion 62 bulging in a semicircular cross section is formed at the free end portion of 0.

On the corner portion 65 on which the support shaft 55 of the lower half 33 is erected, the rotational position regulation formed on the lock arm portion 59 of the shutter lock member 47 in parallel with the shutter slide guide wall 43. A shutter lock member rotation restricting wall 66 with which the step portion 61 is engaged is formed. Also, the lower half 3
In the corner portion 65 on which the support shaft 55 of No. 3 is erected, the elastic displacement portion of the shutter lock member 47 is arranged so as to be parallel to the shutter lock member rotation restricting wall 66 from the outer surface of the disk storage portion forming wall 36b. A contact support wall 67 on which the contact portion 62 of 60 is contacted and supported is provided upright integrally.

Further, a disc portion forming wall 36b is provided on a corner portion 65 on which the support shaft 55 of the lower half 33 is erected.
A lock arm portion support wall 68 that supports the tip side of the lock arm portion 59 of the shutter lock member 47 is erected so as to connect the outer side surface of the shutter lock member rotation restricting wall 66 and the lock arm portion 59. A shutter lock member support piece 69 is provided upright between the contact portion support wall 68 and the support shaft 55 to connect the contact support rib 67 and the shutter lock member rotation restricting wall 66. . The shutter lock member support piece 69 supports the side surface of the shutter lock member 47 and maintains an appropriate gap between the shutter lock member 47 and the inner surface of the lower half 33.

As shown in FIG. 3, the space between the support shaft 55 and the shutter lock member support piece 69 of the corner portion 65 on which the support shaft 55 of the lower half 33 is erected is lowered during molding. Half 3
It is an eject pin protruding portion 72 from which an eject pin for protruding 3 from the cavity is projected. Therefore, due to the ejection of the eject pin, a burr protruding from the surface of the lower half 33 is formed around the eject pin protruding portion 72, and this burr exists in the rotation region of the shutter lock member 47. The shutter lock member support piece 69 does not hinder the operation of the shutter lock member 47, which has a proper gap between it and the inner surface of the lower half 33.

As shown in FIG. 3, the shutter lock member 47 has a rotation position restricting step portion 61 formed in a lock arm portion 59 by inserting an insertion hole 56 formed in a pivot portion 57 into a support shaft 55. The shutter lock member rotation restricting wall 66 is engaged, and the abutment portion 62 at the tip of the elastic displacement portion 60 is abutted and supported by the abutment support wall 67 so that the corner portion 65 in the lower half 33 is provided. Arrange.

In the shutter lock member 47 disposed in the corner portion 65 of the lower half 33 as described above, the lock arm portion 59 is formed on the front surface side of the cartridge main body 34 to open the shutter. Is extended along the insertion groove 42,
As a result, the engaging recess 58 formed at the top of the lock arm portion 59 faces the shutter opening member insertion groove 42 and is relatively engaged with the engaging piece 48 of the shutter member 41 that slides on the front side of the cartridge body 34. It becomes possible.

In the normal state, the shutter member 41 has an opening that closes the information signal recording / reproducing openings 39 and 40 by engaging the engaging piece 48 of the shutter lock member 47 with the engaging recess 58. It is held in the locked state at the part blocking position.

A cartridge holder or the like in which the disc cartridge having the shutter lock member 47 is arranged in the information recording / reproducing apparatus in accordance with the insertion direction indicating mark 70 provided on the upper surface of the cartridge body 34. Equipped with
When it is inserted into the cartridge mounting portion, the shutter opening member 71 provided on the information recording / reproducing apparatus side enters into the shutter opening / closing member insertion groove 42 formed on the front surface side of the cartridge body 34.

When the disc cartridge is inserted into the disc mounting portion of the information recording / reproducing apparatus, the shutter releasing member 71 moves from the outer surface of the lock arm portion 59 of the shutter lock member 47 to the front end side. The user climbs up and pushes the lock arm portion 59 inward of the cartridge body 34.

The lock arm portion 59 is the cartridge main body 3
By being pressed inwardly of 4, the shutter lock member 47 rotates in the clockwise direction in FIG. 3 about the pivotal support portion 57 pivotally supported by the support shaft 55 and abuts against the abutment support wall 67. The elastic displacement portion 60 with which the portion 62 is brought into contact is elastically displaced.
By the rotation operation of the shutter lock member 47, the engagement piece 48 of the shutter member 41 is released from the engagement recess 58 of the shutter lock member 47, so that the shutter member 41 is free to move.

When the disc cartridge is further inserted into the cartridge mounting portion after the shutter member 41 is free to move, the shutter member 41 is pressed by the shutter opening member 71 and the opening portion opening position. The shutters 41a, 41b open the closed state of the information signal recording / reproducing openings 39, 40 of the cartridge main body 34.

Then, when the shutter member 41 slides to the opening opening position, the pressing operation of the lock arm portion 59 by the shutter opening member 71 is released, the elastically displaced elastically displaced portion 60 elastically returns, and the shutter locks. The member 47 is pivotally returned to the counterclockwise direction in FIG.
Is in a state of facing.

In the disc cartridge of the embodiment, the shutter member 41 has a connecting piece 41c substantially at the center thereof.
When the information signal recording / reproducing openings 39, 40 are opened and mounted in the cartridge mounting portion in the information recording / reproducing apparatus, the shutter closing pin provided on the side of the information recording / reproducing apparatus is engaged. A pin engagement hole 73 is provided.

When the recording or reproducing operation of the information signal is completed and the disc cartridge is ejected, the shutter member 41 is moved relative to the cartridge main body 34 and moves toward the opening closing position. By the operation of the shutter member 41, the engaging piece 48 is mounted on the guide surface provided at the tip of the lock arm portion 59 of the shutter lock member 47 in the state where the engagement lock 48 is returned to be rotated, and thereby, the shutter lock is performed. The elastic displacement portion 60 of the member 47 is elastically displaced.

When the disk cartridge is further pulled out, the engagement piece 48 of the shutter member 41 and the engagement recess 58 of the shutter lock member 57 are engaged with each other, and the shutter member 41 is held in the locked state at the opening closed position. To be done.

In the above embodiment, an example in which the present invention is applied to a disc cartridge accommodating the optical disc 31 is shown, but the present invention is movable so as to open and close an opening for recording and reproducing information signals formed in the cartridge main body. It can be widely applied to disc cartridges having various shutter members.

[0048]

As described above, according to the shutter lock mechanism of the disc cartridge according to the present invention, the corner portion of the cartridge main body in which the shutter lock member is arranged and the supporting shaft thereof is provided upright. A shutter lock member support piece, which forms a gap between the surface of the corner portion and the side surface of the shutter lock member, is integrally provided on the surface so as to face the rotation region of the shutter lock member. Since the eject pin projecting portion from which the eject pin projects is provided, the contact resistance area between the surface of the cartridge body and the shutter lock member is reduced, and the shutter lock member can operate smoothly. Further, the protrusion of the eject pin of the molding die causes burrs in the rotating region of the shutter lock member, but the burrs hinder the operation of the shutter lock member and the burrs scraps adhere to the information recording medium. It does not cause

[Brief description of drawings]

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

FIG. 2 is a perspective view from the top side of a disc cartridge having a shutter lock mechanism according to the present invention.

FIG. 3 is a plan view of relevant parts showing a state where a shutter lock member of a disk cartridge including a shutter lock mechanism according to the present invention is assembled to a cartridge body.

FIG. 4 is a perspective view from one side surface side of a shutter lock member that constitutes a shutter lock mechanism according to the present invention.

FIG. 5 is an exploded perspective view of a disk cartridge having a conventional shutter lock mechanism.

FIG. 6 is a plan view of relevant parts showing a state where a shutter lock member of a disk cartridge having a conventional shutter lock mechanism is assembled to a cartridge body.

[Explanation of symbols]

 31 ... Optical disc 32 ... Upper half 33 ... Lower half 34 ... Cartridge main body 39 ... Information signal recording / reproducing opening 40 ... Information signal recording / reproducing opening Part 41 ... Shutter member 42 ... Shutter release member insertion groove 47 ... Shutter lock member 48 ... Engaging piece 55 ... Support shaft 56 ... Insertion hole 57 ... Pivot part 58. ..Engagement recess 59 ... Lock arm part 60 ... Elastic displacement part 65 ... Corner part 67 ... Abutment support rib 68 ... Lock arm part support wall 69 ... -Shutter lock member support piece 71 ... Shutter release member 72 ... Eject pin protrusion

Claims (1)

[Claims] 1. A disk-shaped information recording medium is rotatably accommodated and an opening for information signal recording / reproducing is formed so that at least a part of the information recording medium is exposed to the outside in the radial direction. A main body of the cartridge, a shutter member movably attached to the main body of the cartridge for opening and closing an opening for information signal recording and reproduction, and an opening of the shutter member rotatably supported by a support portion provided on the main body of the cartridge. And a shutter lock member for holding the shutter lock member in a closed position, and a corner portion provided with a support portion for the shutter lock member of the cartridge main body faces the rotation region of the shutter lock member, and the surface of the cartridge main body And a side surface of the shutter lock member, a shutter lock member supporting piece that forms a gap is integrally provided upright, and the shutter lock member supporting piece and the shutter lock member are supported. Disk cartridge having an ejector pin protruding portion from which an ejector pin of a molding die protrudes