JP3227818B2 - 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 in which 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 is rotatably stored, and more particularly to an information signal recording. The present invention relates to a disk cartridge provided with a shutter lock mechanism for holding a shutter member for opening and closing a reproduction opening at a position where the opening is closed.

[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 damaged or damaged, the signal cannot be read. For this reason, the disk cartridge accommodates the information recording medium in a rectangular cartridge body so as to be rotatable, and has an opening for recording and reproducing information signals and this opening at all times. It has a shutter member that is closed and a shutter lock member that holds the shutter member at the opening closing position.

Conventionally, a disk cartridge provided with a shutter lock member as shown in FIGS. 5 and 6 has been proposed. This conventional disk cartridge is formed by combining an upper half 2 and a lower half 3 which are substantially in the shape of a rectangular shallow plate.
An optical disk 1 is rotatably housed in the cartridge body 4.

When the disc cartridge is mounted on an information recording / reproducing apparatus, it is located substantially at the center of the lower half 3.
A disk table entry section 5 is provided for entering a disk table of an information recording / reproducing apparatus for rotatingly driving the optical disk 1 built in the cartridge body 4. Also, upper and lower hearts
A part of the signal recording area of the optical disk 1 is exposed outward from the position close to the disk table entry portion 5 to the front side of the cartridge body 4 over the inner and outer circumferences. Opening portions 6 and 7 for recording and reproducing information signals are formed in a square shape.

[0005] The cartridge body 4 is provided with a shutter member 8 for preventing the entry of dust and the like and for protecting the optical disc 1. The shutter member 8 is formed by bending a thin metal plate as a material into a substantially U-shape. The shutter members 8a and 8b open and close the information signal recording / reproducing openings 6 and 7, respectively. 8a, 8
and a connecting piece 8c for connecting the base end side of b.

On one side of the connecting piece 8c, a guide portion 9 for guiding the shutter member 8 so as to be able to move in parallel along the front side of the cartridge body 4 is extended, and a part thereof is provided. An engagement piece 10 is provided by being bent inward.

[0007] On the front side of the cartridge body 4, a shutter opening member insertion groove 18 with which a shutter opening member 20 (see FIG. 6) provided in the cartridge insertion portion of the information recording / reproducing apparatus engages is formed. The shutter member 8 extends over the information signal recording / reproducing openings 6 and 7 so that the shutter member 8 extends over the information signal recording / reproducing openings 6 and 7 so as to straddle the shutter opening member insertion groove 18. It is movably attached to the front side of the cartridge body 4.

At one corner A on the front side of the lower half 3, a shutter member 8 is provided with information signal recording / reproducing openings 6,7.
A shutter lock member 11 for holding the shutter at a position to close the shutter is provided. The shutter lock member 11 is formed of a synthetic resin material. The shutter lock member 11 is formed to be thin from one end of a base portion configured as an attachment portion 12 and is curved through an elastic displacement portion 15 capable of elastic displacement. The memory section 13 is extended. At the top of the outer side of the lock arm 13, there is provided an engagement recess 14 which engages with the engagement piece 10 of the shutter member 8.

The shutter lock member 11 is provided with a pair of mounting members 12 having through holes 17, 17 formed in the mounting portion 12 erected on the lower half 3 such that the engaging concave portions 14 face the front surface of the cartridge body 4. By fitting to the pins 16, 16, the lower half 3 is attached to the inner surface. When the shutter member 8 is set to the position where the shutter member 8 closes the information signal recording / reproducing openings 6 and 7, the engagement recess 14 is engaged with the engagement piece 10 of the shutter member 8. The relative engagement holds the shutter member 8 in a locked state.

When the disc cartridge is inserted into the cartridge mounting portion of the information recording / reproducing apparatus, a shutter opening member on the information recording / reproducing apparatus side is inserted into a shutter opening member insertion groove 18 recessed on the front side of the cartridge body 4. 20 engage.
When the disc cartridge is still pushed into the cartridge mounting portion, the shutter opening member 20 is raised from the base outer side surface of the lock arm portion 13 of the shutter lock member 11 toward the front end side. The lock arm 13 is pressed inward of the cartridge body 4 while the elastic displacement portion 15 is elastically displaced.

Thus, the engagement piece 1 of the shutter member 8
0 is disengaged from the engagement recess 14 of the shutter lock member 11, and the shutter member 8 is pushed by the shutter opening member 20 to move in the direction of opening the information signal recording / reproducing openings 6, 7. . Although a detailed description is omitted, the shutter member 8 performs an ejection operation and a pull-out operation to remove the disk cartridge from the cartridge mounting portion of the information recording / reproducing apparatus, thereby opening the information signal recording / reproducing opening. Return to the initial position to close 6,7.

[0012]

The upper and lower halves 2 and 3 are formed of a synthetic resin. However, as described above, the shutter lock member 11 is provided on one side of the lower half 3 on the front side. Since the corner portion A is provided with the mounting pins 16 and 16 of the shutter lock member 11 and the like, the corner portion A is also provided with the corner portion A due to the configuration of the molding die. It is preferable to arrange a protrusion of an eject pin for projecting the molded product from the cavity.

However, when the eject pin is hit against the molded product after the molding is completed, burrs are generated on the surface of the molded product. Therefore, burrs due to the ejection pin abutting on the surface of the corner portion A of the lower half 3 are not affected.
There is a possibility that the shutter lock member 11 disposed at the corner portion A may be caught and hinder the operation thereof.

By providing the shutter member and the shutter lock member described above, entry of dust and the like from the outside into the cartridge body 4 is prevented, but the shutter lock member is operated each time the shutter lock member 11 operates. The lower half 3 is formed by the member 11 due to the eject pin of the molding die.
There is a possibility that the burrs generated on the surface of the optical disk 1 are shaved and the shavings adhere to the optical disk 1 stored in the cartridge body 4.

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

Therefore, according to the present invention, the ejection pin of the molding die also protrudes from one of the front corners of the lower half provided with a support shaft for rotatably supporting the shutter lock member. In providing the portion, the shutter lock member operates smoothly without being affected by burrs caused by the protrusion of the eject pin, and the shutter member and the shutter lock member achieve reliable protection of the optical disk housed in the cartridge body. It has been proposed for the purpose of providing a disc cartridge which can be obtained.

[0017]

In order to achieve the above-mentioned object, according to the present invention, a cartridge contains a disk-shaped information recording medium rotatably accommodated therein and at least a part of the information recording medium in a radial direction. A cartridge body having an information signal recording / reproducing opening formed to face outward, a shutter member movably attached to the cartridge body to open and close the information signal recording / reproducing opening, A shutter lock member rotatably supported by the provided support portion and holding the shutter member at a position for closing the information signal recording / reproducing opening. The shutter lock member used here includes a pivotal support portion through which a support portion provided on the cartridge body is inserted, a lock arm portion provided with an engagement recess formed with an engagement piece formed on the shutter member, and And an elastic displacement portion integrally extending from the pivot portion so as to face the lock arm portion. The cartridge body to which the shutter lock member is attached has a corner portion provided with a support portion for the shutter lock member, and a surface of the cartridge body and a side surface of the shutter lock member facing a rotation region of the shutter lock member. And a shutter lock member support projection which integrally forms a gap between the shutter arm member and the support portion of the shutter lock member, and between the lock arm portion and the elastic displacement portion. And an eject pin protruding portion from which the eject pin of the molding die projects is provided.

[0018]

In the disk cartridge according to the present invention, the contact area between the shutter lock member and the surface of the cartridge body is obtained by the rotation of the shutter lock member supported by the shutter lock member support projection provided on the cartridge body side. Is reduced. An eject pin protrusion is provided between the shutter lock member support protrusion and the support portion of the shutter lock member, and between the lock arm portion of the shutter lock member and the elastic displacement portion, from which the eject pin of the molding die projects. With this arrangement, the contact between the shutter lock member, which is supported by the support projection and rotates, and the eject pin protruding portion is prevented.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. First, as shown in FIG. 1, a disk cartridge provided with a shirt lock mechanism according to the present invention is composed of an upper half 32 and a lower half 33, each of which is formed of a synthetic resin material and has a substantially shallow plate shape. Cartridge body 34 to be combined
In the cartridge body 34, an optical disk 31, which is a disc-shaped information recording medium, is rotatably housed.

On the outer periphery of the upper and lower halves 32 and 33, rising peripheral walls 35a and 35b which abut against each other to form an outer peripheral wall 35 of the cartridge body 34 are provided upright. Opposite inner surfaces of the halves 32 and 33 are formed as arc-shaped walls inscribed in the rising peripheral walls 35a and 35b, and are formed with a plurality of disk storage portion forming walls 36a and 36b which abut against each other to form a disk storage portion. Butt fitting projections 37a and 37b are provided upright, respectively.

Accordingly, the upper and lower halves 32, 33 are assembled so that the respective rising peripheral walls 35a, 35b and the respective disk storage portion forming walls 36a, 36b abut, and the respective butting fitting projections 37a, 37b are fitted. These are combined by ultrasonic welding or the like to form a cartridge body 34.

A circular opening 3 is formed at a substantially central portion of the lower half 33.
In the opening 38, a disc table of the information recording / reproducing apparatus for driving the optical disc 31 accommodated in the cartridge body 34 enters when the disc cartridge is mounted on the information recording / reproducing apparatus. Function as a disc entry opening. This disk entry opening 3
8 specifically, a metal plate 31a for a magnet clamp provided by closing the center hole of the optical disk 31 housed in the cartridge body 34 is exposed to the outside.

The upper and lower surfaces of the cartridge body 34, that is, the upper and lower halves 32 and 33, are information signals for causing at least a part of the signal area of the stored optical disk 31 to face outward over the inner and outer circumferences. The recording / reproducing openings 39 and 40 are opened opposite to each other. The information signal recording / reproducing openings 39 and 40 are, as shown in FIG. The cartridge body 34 is formed in a rectangular shape at substantially the center in the left-right direction over the front side of the cartridge body 34.

On the front side of the cartridge body 34, a shutter opening member insertion groove 42 into which a shutter opening member 71 (see FIG. 3) disposed on the recording / reproducing apparatus side for moving a shutter member 41 described later enters. Is formed.

This shutter opening member insertion groove 42 is
As shown in (1), the cartridge body 34 has an opening end 42a on one side surface orthogonal to the front surface, and is formed in the movement direction of the shutter member 41. A shutter slide guide wall 43 erected on the inner side surface of the lower half 33 is provided in the shutter opening member insertion groove 42 in order to guarantee a stable operation of the shutter member 41.

The upper half 32 has a butting wall 44 erected thereon. The butting wall 44 is provided on the inner surface of the front edge of the information signal recording / reproducing opening 39 at the lower half 33. The cartridge main body 34 is prevented from bending in the thickness direction of the cartridge main body 34 at the shutter opening member insertion groove 42 by abutting against the inner side surface.

In order to prevent dust or the like from entering the cartridge body 34 through the information signal recording / reproducing openings 39 and 40 and sticking to the optical disk 31 accommodated therein, the cartridge body 34 has an information signal recording / reproducing device. 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 includes shutter portions 41a and 41b for opening and closing the information signal recording / reproducing openings 39 and 40, respectively, and a base for the shutter portions 41a and 41b. Connecting piece 41 connecting end sides
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 is a U-shaped section having a height substantially corresponding to the height of the front side of the lower half 33, and the shutter member 41 is First and second slide guides 45 and 46 are provided to guide so as to be stably movable in parallel along the front side. When the shutter member 41 is attached to the cartridge body 34 on the distal 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. An engagement piece 48 that is relatively engaged with a shutter lock member 47 disposed in the cartridge body 34 described later is formed in a bent shape.

First and second slide guides 45, 46
The shutter member 41 fitted to the cartridge body 34 so as to sandwich the front side of the lower half 33
Are mounted on the cartridge body 34 movably over two positions, a closed position for closing the information recording / reproducing openings 39 and 40 and an open position for opening. A shutter member 41 is provided in a region of the cartridge body 34 extending from the periphery of the information signal recording / reproducing openings 39 and 40 on which the shirt member 41 moves to one side surface and a region extending from the front surface side of the cartridge body 34. A shutter slide recess 52 having a depth substantially equal to the plate thickness of the shutter body 41 is provided by the shutter slide recess 52.
Can be assembled flush with the surface of the cartridge body 34, and an increase in thickness due to the assembly of the shutter member 41 to the cartridge body 34 is prevented.

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 and 40 are closed. The shutter lock member 47 is formed of a synthetic resin material, and has a cartridge body 34 at its base end.
The engagement between the pivotal support portion 57 formed with the insertion hole 56 inserted through 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 is relatively engaged. A lock arm portion 59 provided with a concave portion 58;
And an elastic displacement portion 60 integrally extended from the pivot support portion 57 so as to face the rubber portion 59.

The lock lock of the shutter lock member 47 is
The center portion 59 is formed in a substantially rectangular shape so as to protrude at the center, and a shutter member 41 is provided at the top of the center protuberance.
An engagement recess 58 is formed in which the engagement piece 48 formed in the above is engaged. At the base end side of the lock arm portion 59 of the shutter lock member 47, as shown in FIG. 4, the portion of the other side surface of the lock arm portion 59 from the front end to the base end is thinly cut out. A rotation position regulating step 61 is formed.

When the shutter lock member 47 is attached to the cartridge body 34, the rotation position regulating step 61 is provided with a shutter (described later) formed on the inner surface of the lower half 33 of the cartridge body 34. Lock member rotation restricting wall 66
And restricts the rotation position of the shutter lock member 47. Elastic displacement part 6 of shutter lock member 47
A contact portion 62 bulging in a semicircular cross section is formed at the free end of the zero.

At a corner 65 where the support shaft 55 of the lower half 33 is erected, a turning position regulation formed on a lock arm portion 59 of a shutter lock member 47 in parallel with the shutter slide guide wall 43 is provided. A shutter lock member rotation restricting wall 66 with which the step 61 is engaged is formed. Also, lower half 3
An elastic displacement portion of the shutter lock member 47 is provided on the corner portion 65 on which the third support shaft 55 is erected so as to be parallel to the shutter lock member rotation regulating 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 the contact member 60 is supported is integrally erected.

A shutter lock is provided at a corner 65 on which the support shaft 55 of the lower half 33 is erected, so as to connect the outer surface of the disk storage portion forming wall 36b and the shutter lock member rotation restricting wall 66. A lock arm portion support wall 68 that supports the distal end side of the lock arm portion 59 of the member 47 is provided upright. Further, as shown in FIGS. 1 and 3, the contact support rib 67 and the shutter lock member rotation restricting wall 66 are connected between the lock arm portion support wall 68 and the support shaft 55. A ridge-shaped shutter lock member support projection 69 is provided upright. The shutter lock member support projection 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, between the support shaft 55 and the shutter lock member support projection 69 of the corner portion 65 where the support shaft 55 of the lower half 33 is erected, as shown in FIG. An eject pin projecting portion 72 from which an eject pin for projecting the hook 33 from the cavity projects. Therefore, a burr projecting from the surface of the lower half 33 is formed around the eject pin protruding portion 72 by the protrusion of the eject pin.
However, the operation of the shutter lock member 47 in which a proper gap is held between the shutter lock member support projection 69 and the inner surface of the lower half 33 is not hindered. Absent.

As shown in FIG. 3, the shutter lock member 47 has a through hole 56 formed in the pivotal support portion 57 inserted through the support shaft 55, and a rotation position regulating step 61 formed in the lock arm portion 59. It is engaged with the shutter lock member rotation restricting wall 66 and the contact portion 62 at the tip end of the elastic displacement portion 60 is contacted and supported by the contact supporting wall 67 so as to be connected to the corner portion 65 in the lower half 33. Arrange.

As described above, the shutter lock member 47 disposed on the corner portion 65 of the lower half 33 is a shutter opening member in which the lock arm portion 59 is formed on the front side of the cartridge body 34. Extending 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 sliding on the front side of the cartridge body 34. It becomes possible.

In the normal state, the engagement member 48 of the shutter lock member 47 is engaged with the engagement recess 58 in the normal state, so that the information signal recording / reproducing openings 39 and 40 are closed. It is held in the locked state at the part closing position.

An embodiment of the disc cartridge having the shutter lock member 47 is a cartridge holder or the like disposed in the information recording / reproducing apparatus according to the insertion direction indicating mark 70 provided on the upper surface of the cartridge body 34. Car with
When inserted into the cartridge mounting portion, the shutter opening member 71 provided on the information recording / reproducing device side enters the shutter opening / closing member insertion groove 42 formed on the front 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 release member 71 is moved from the base outer side surface of the lock arm portion 59 of the shutter lock member 47 to the front end side. Then, the lock arm 59 is pressed inward of the cartridge body 34.

The lock arm portion 59 is used for the cartridge body 3.
4, the shutter lock member 47 pivots clockwise in FIG. 3 around the pivotal support portion 57 pivotally supported by the support shaft 55 and contacts the contact support wall 67. The elastic displacement portion 60 with which the portion 62 is in contact is elastically displaced.
By the rotation of the shutter lock member 47, the shutter member 41 is free to move when the engagement piece 48 is disengaged from the engagement recess 58 of the shutter lock member 47.

After the shutter member 41 is free to move, the disk cartridge is further inserted into the cartridge mounting portion. When the shutter member 41 is pressed by the shutter opening member 71, the shutter is opened. In the direction, and the closed state of the information signal recording / reproducing openings 39, 40 of the cartridge body 34 by the shutter portions 41a, 41b is released.

When the shutter member 41 slides to the opening position, the pressing operation of the lock arm 59 by the shutter opening member 71 is released, and the elastically displaced portion 60, which has been elastically displaced, is elastically returned to the shutter lock state. The member 47 pivots and returns in the counterclockwise direction in FIG.
Is facing.

In the disc cartridge of the embodiment, a substantially central portion of the connecting piece 41c of the shutter member 41 is provided.
When the information signal recording / reproducing opening portions 39 and 40 are opened and mounted on a cartridge mounting portion in the information recording / reproducing device, a shutter closing pin provided on the information recording / reproducing device side engages a shutter closing. A pin engagement hole 73 is provided.

When the recording or reproducing operation of the information signal is completed and the eject operation of the disk cartridge is performed, the shutter member 41 is moved relatively to the cartridge body 34 and moves toward the opening closing position. By the operation of the shutter member 41, the engaging piece 48 rides 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 piece 48 has been returned to the rotational state. 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, and the shutter member 41 is held in the locked state at the opening closed position. Is done.

In the above embodiment, an example is shown in which the present invention is applied to a disk cartridge in which an optical disk 31 is housed. However, in the present invention, a movable unit for opening and closing an information signal recording / reproducing opening formed in the cartridge body is provided. The present invention can be widely applied to a disk cartridge having a simple shutter member.

[0048]

As described above, in the disk cartridge according to the present invention, the surface of the cartridge main body is provided at the corner of the cartridge main body where the support portion of the shutter lock member is provided, facing the rotation area of the shutter lock member. A shutter lock member support protrusion that forms a gap between the shutter lock member and the side surface of the shutter lock member is integrally formed with the shutter lock member support protrusion, and the shutter lock member is locked between the shutter lock member support protrusion and the support portion of the shutter lock member. Since an eject pin projecting portion is provided between the arm portion and the elastic displacement portion to project the eject pin of the molding die, the contact area of the shutter lock member with the surface of the cartridge body is reduced, and The contact with the periphery of the eject protrusion where the protrusion of the eject pin is generated due to the contact mark of the eject pin is regulated. , Smooth operation of the shutter lock member is realized, moreover, to suppress the generation of shavings due to the rotation of the shutter locking member, it is possible to ensure protection of the information recording medium housed in the cartridge body.

[Brief description of the drawings]

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

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

FIG. 3 is a main part plan view showing a state where a shutter lock member of a disk cartridge provided with a shutter lock mechanism according to the present invention is assembled to a cartridge body.

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

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

FIG. 6 is a plan view of a main part showing a state where a shutter lock member of a disk cartridge provided with a conventional shutter lock mechanism is assembled to a cartridge body.

[Explanation of symbols]

31 optical disk, 34 cartridge body, 3
9, 40 information signal recording / reproducing opening, 41 shutter member, 47 shutter lock member, 55 support shaft,
58 engagement recess, 59 lock arm, 60
Elastic displacement part, 65 corner part, 69 shutter lock member support protrusion, 72 eject pin protrusion

Claims (1)

(57) [Claims] 1. A cartridge in which a disc-shaped information recording medium is rotatably housed and an information signal recording / reproducing opening for forming at least a part of the information recording medium outward in a radial direction is formed. body and, movably and the shutter member for opening and closing the information signal recording reproducing apertures is mounted, rotatably supported by the information signal recording said shutter member to a supporting portion provided on the cartridge body to the cartridge body Playback opening
A shutter lock member for holding the shutter lock member in a closed position , wherein the shutter lock member is provided on the cartridge body.
The shutter support is formed with the pivotal support part through which the girder support is inserted.
A locker provided with an engagement recess in which the formed engagement pieces are relatively engaged.
Arm so that it faces the lock arm
Consists of a resilient displacement portion extending integrally from the pivot portion, the corner portion having a supporting portion of the shutter locking member of the cartridge body, facing the rotation region of the shutter locking member, the cartridge body the shutter locking member support protrusion constituting a gap between the side surface and the Shah <br/> Ttarokku member while integrally projects, between the supporting portion of the shutter locking member support protrusion and the shutter locking member And the elastic deformation with the lock arm portion.
A disc cartridge provided with an eject pin protruding portion which is located between the protruding portion and the protruding eject pin of the molding die.