JPH0770188B2 - Disco Cartridge - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a disc cartridge in which an information recording disc such as a magnetic disc or an optical disc is stored.

[Conventional technology]

FIG. 6 is an explanatory view showing an outline of an example of a conventional disc cartridge. This disk cartridge is provided with a spring 34 in a cartridge case 35 that engages with a protrusion 33 of a shutter 32 that opens and closes a magnetic head insertion opening 31.
A notch 38 into which a pin 37 erected at the end of a rotating member 36 provided in a disk drive device (not shown) can be fitted is provided on the front surface of the.

When this disc cartridge is inserted into the disc drive as indicated by arrow 39, the pin 37 engages with the notch 38, and the rotating member 36 moves in the direction of arrow 40 according to the pushing force applied to the disc cartridge. When the shutter 32 is rotated, the pressing force by the pin 37 is applied to the shutter 32, the shutter 32 moves in the direction of the arrow 41, and the opening 37a of the shutter 32 overlaps with the magnetic head insertion opening 31 to open. . After that, a magnetic head (not shown) enters the cartridge case 35 through the magnetic head insertion port 31, and desired recording / reproduction is performed facing the magnetic disk (not shown).

However, in this disk cartridge, since the rotating member 36 is provided in the vicinity of the magnetic head device that holds and moves the magnetic head, the arrangement of parts of the disk drive device is restricted and the structure of the disk drive device becomes complicated.

A slider 14 having flexibility (elasticity) as shown in FIG. 7 has been proposed as a solution to this problem.
There is known a structure in which the shutter and the shutter are connected to each other, and the slider is moved in the front-rear direction on the side surface of the case to move the shutter to open and close the magnetic head insertion opening.

[Problems to be solved by the invention]

However, this disk cartridge needs to be installed in the case while bending the slider 14 along the outer periphery of the disk storage space. Therefore, the slider 14 often projects from the guide groove of the case due to the elastic force of the slider 14, and the workability of assembly is not good.

Further, since the movement amount of the slider 14 and the movement amount of the shutter 13 are always in a one-to-one relationship, the position of the shutter 13 near the open state of the shutter 13 directly affects the variation of the insertion stroke of the disc cartridge. For example, if the insertion stroke of the disc cartridge varies by 1 mm, the position of the shutter 13 also shifts by 1 mm, which may cause a part of the magnetic head to collide with the shutter 13 and damage the magnetic head or (and) the shutter 13. It was The variation in the insertion stroke of the disc cartridge is mainly due to the variation in the component size and the component mounting position in the disc drive device.

Further, conventionally, as disclosed in Japanese Utility Model Publication No. 45-10063, a crank-shaped slider is connected to a shutter, and a link is rotatably attached to the tip of the slider, and the other end of the link is attached to a cartridge case. The side wall of the cartridge case is supported, and the head insertion opening is closed by the shutter and the connecting portion of the slider and the link is elastically urged by a spring so that the connecting portion contacts the side wall of the cartridge case. A disk cartridge having a hole formed in it has been proposed.

When this disc cartridge is inserted into the disc drive device, the pin provided inside the device is inserted into the hole, and the link rotates inside the cartridge case, that is, toward the disc side by the pin against the elastic force of the spring. As a result, the shutter moves via the slider to open the head insertion opening.

Since this disc cartridge also has a one-to-one relationship between the pushing amount of the link and the moving amount of the shutter, the position near the open state of the shutter directly affects the variation of the insertion stroke of the disc cartridge, which may cause a trouble. Cause.

Further, in this disc cartridge, since the link is rotated toward the inside of the cartridge case, that is, toward the disc side when the shutter is opened, an extra space for rotating the link is required, and the size of the disc cartridge is small. It becomes an obstacle to realization.

Further, if the structure is used to reduce the size, when the link is rotated toward the disk to open the shutter, the distance between the link and the disk or (and) the crank-shaped slider and the disk becomes extremely short. Therefore, if there is an eccentricity when the disk rotates, there is a problem in that the disk comes into contact with the link or the slider to stabilize the rotational state and adversely affect the recording and reproduction of information.

An object of the present invention is to solve the above problems, to provide a disk cartridge suitable for miniaturization, having high operation reliability, and good assembling workability.

[Means for solving problems]

In order to achieve this object, the present invention provides a cartridge case having an inner disk storage space and a head insertion opening at a predetermined position, and an information recording disk rotatably stored in the disk storage space of the cartridge case. And a shutter that opens and closes the head insertion opening by moving along the front surface of the cartridge case, and a spring for constantly elastically biasing the shutter in the closing direction. It is a thing.

A slider integrally connected to the shutter, extending in the shutter movement direction, and arranged near the front surface of the cartridge case so as to be movable in the same direction as the shutter, and guiding the slider in the direction along the front surface of the cartridge case. The slider guide portion, a concave portion formed to extend from one corner of the front face of the cartridge case in the insertion direction of the disc cartridge, and into which the locking portion of the disc drive device is inserted; Is rotatably connected to the slider, and the other end thereof projects into the concave portion. The spring is locked between the cartridge case and the slider, and the elasticity of the spring causes the slider to move. The shutter is urged in the closing direction via and the other end of the slider always moves along the side surface of the recess. And the other end of the direction changing part comes into contact with the locking part of the disk drive device inserted into the recess of the cartridge case, and the direction changing member is It is characterized in that the shutter moves in an arc shape in the front corner of the cartridge case, the slider is displaced accordingly, and the shutter opens and closes the head insertion opening.

〔Example〕

The disc cartridge of the present invention will be described below with reference to the drawings. 1 to 5 are explanatory views showing an embodiment of the present invention. FIG. 1 is a plan view showing a main part of a lower case side, FIG. 2 is a front view including a cross-sectional portion, and FIG. FIG. 4 is a side view including a cross-sectional portion, FIG. 4 is a plan view of relevant parts showing a state in which a shutter is opened, and FIG. 5 is a developed view of a cartridge case.

In these figures, 50 is the upper case, 51 is the lower case,
By stacking these, a storage space for storing a disk (not shown), for example, a magnetic disk is formed inside.

As shown in FIG. 5, the upper case 50 and the lower case 51 have holes 52, 53 into which the drive shaft of a disk drive device (not shown) is inserted, and recesses 54, 53 for storing the disks. 55 and substantially rectangular head insertion openings 56 and 57, and recesses 58 and 59 are formed near the head insertion openings 56 and 57 on the outer surface.

Reference numeral 60 denotes a shutter that opens and closes the head insertion openings 56 and 57. As shown in FIG. 3, it has a pair of flat plate portions 61 and 62, and the basic sectional shape of the whole is U-shaped. The recesses 58 and 59 of the upper and lower cases 50 and 51 are slidably mounted on the upper and lower cases 50 and 51. The shutter 60 is, as shown in FIG. 1, a front surface 50a, 5 of the case 50, 51.
Tongue pieces 63 are provided on the upper, lower, left and right portions located at 1a.

Reference numeral 63 is a strip-shaped slider that is slidable in the direction along the front surfaces 50a, 51a of the cases 50, 51. The front wall 90 of the cases 50, 51 is opposed to the front wall 90 and the head insertion port 56, The basic shape of the cross section of the portion where the shutter 60 is mounted is the protrusion that is housed in the grooves 65 and 66 of the slider guide that is formed by the rising portions 81R and 81L that project from the front left and right of 57. It is a T-shape having 67 in the part, and the basic shape of the cross section of the other part is rectangular. Further, as shown in FIG. 1, a step portion 68 is provided on the right side, and as shown in FIG. 2, this step portion 68 can be engaged with a step portion 69 formed in the groove of the lower case 51. .

The shutter 60 is mounted with the slider 64 housed in the grooves 65 and 66 of the cases 50 and 51. In this case, the protruding portion of the slider 64 is
67 is pushed over the flat plate portions 61, 62 of the shutter 60 toward the recesses 58, 59 of the cases 50, 51, and the tongue piece 63 is pushed.
When the vehicle gets over the protruding portion 67, the mounting is completed. At this time, the end surface of the tongue piece 63 faces the protruding portion 67, and the shutter 60 is regulated so as not to move in the counter-pushing direction.

70 is a lever as a direction changing member that is arranged in a dead space at the front corner of the lower case 51 and works in conjunction with the shutter 60.
For example, it is arranged on the lower case 51 side, and one end 71 is a pin 72.
An operation that is rotatably connected to an end portion 73 of the slider 64 near the end portion 68, and is locked to the other end portion 74 by a side surface 75 of the lower case 51 so as to prevent it from entering the inside of the case 51. The lever 77 is provided with a protrusion 78 at the center of the lever 70.

Reference numeral 79 is a spring, and the body is held by the protrusion 78 of the lever 70, one end is engaged with the lever 70, and the other end is engaged with the protrusion 80 provided on the lower case 51. When the shutter 60 floats over a certain distance between them, the shutter 60 is constantly urged in the closing direction (H direction) via the slider 46.
The other end (operation portion 77) of 70 is always urged to come into contact with the side surface 75 of the lower case 51 and move.

It should be noted that the rising portion 81 formed in the groove 66 of the lower case 51 has a low-height portion 82 at a portion positioned on the end portion 73 side of the slider 64, and the end portion 71 of the lever 70 crosses this portion 82. Slider
It is connected to the end 73 of 64.

Reference numeral 83 shown by a chain double-dashed line in FIGS. 1 and 4 is a guide member provided in the disk drive device, and 84 is formed by cutting and raising a part of the guide member 83, and engages with the operating portion 77 of the lever 70. It is a locking member. A recess 91 extending in the insertion direction A of the disc cartridge is formed on the right side surface of the lower case 51 in the drawing, and the operating portion 77 of the lever 70 is desired in the recess 91.

In this embodiment, the slider 64, the lever 70, the spring 79, etc. are incorporated in the lower case 51, the disc is housed in the recess 55 of the lower case 51, the upper case 50 is combined with the lower case 51, and the shutter 60
Is attached, and the upper case 50 and the lower case 51 are fastened and integrated by screws or the like.

When the disk cartridge is not used, the slider 64 is moved through the lever 70 by the urging force of the spring 79 as shown in FIG.
The stepped portion 68 engages with the stepped portion 69 of the lower case 51, and the shutter 60 connected to the slider 64 closes the head insertion ports 56 and 57.

From this state, when the disc cartridge is inserted along the guide member 83 of the disc drive device in the direction of arrow A in FIG. 1, the locking member 84 is inserted into the recess 91 and abuts on the operating portion 77 of the lever 70, and continues. When the disc cartridge is pushed in by the lever 70, the lever 70 moves in the direction of arrow B against the force of the spring, whereby the slider 64 slides in the direction of arrow C and the shutter 60 also slides in the direction of arrow D. At the end of the insertion of the disk cartridge, the head insertion openings 56 and 57 are opened as shown in FIG. Even in this open state, the slider 64 is engaged with the front wall 90 and the left and right rising portions 81R, 81L.

Then, the magnetic head enters the disk cartridge through the head insertion opening 56 or the head insertion opening 57 and comes into contact with the magnetic disk, and desired recording / reproducing is performed.

When the disc cartridge is moved in the direction E in FIG. 4 and taken out from the disc drive, the operating portion 77 engaged with the locking member 84 is acted on by the force of the spring 79 to project the protrusions 76 and the side surfaces 75 of the cases 50 and 51. The lever 70 slides in the direction of arrow F, the slider 64 slides in the direction of arrow G, the shutter 60 moves in the direction of arrow H, and the head insertion ports 56, 57 are closed.

In this embodiment, the slider is attached to the lower case 51 during assembly.
64, lever 70, spring 79, etc. are attached and sent to the next assembling step for storing disks, stacking the upper case 50, etc., but the slider 64 can be moved linearly. It need not be flexible. Further, the spring 79 may have such a spring force that the step 68 of the slider 64 abuts the step 69 of the lower case 51 with a small force in the state shown in FIG.
The elastic force acting between the slider 64, the lever 70, and the spring 79 is small. Therefore, the slider 64, the lever 70, the spring 79 and the like do not jump out from the lower case 51 even if they are subjected to vibrations during the process of being sent to the next assembling step, and the efficiency of the assembling work is improved.

Also, since the slider 64 is in the shape of a strip plate, the sliding operation is stable,
The stable opening / closing operation of the shutter 60 is performed.

Further, the locking member 84 of the Dinos drive device can be provided at a position sufficiently separated from the magnetic head device, so that restrictions on the arrangement of parts are relaxed and the structure of the disk drive device is simplified.

Although the U-shaped shutter 60 is used in this embodiment, the slider 64 is provided at the ends of two flat plates for opening and closing the head insertion openings 56, 57.
It may be directly fixed to the upper and lower surfaces with screws or the like, and if there is one head insertion opening, only one flat plate may be used, and an appropriate shape may be used.

〔The invention's effect〕

As described above, according to the present invention, the member that engages with the locking member of the disk drive device to open and close the shutter is divided into two parts, the slider and the direction changing member, and both are rotatably connected.
Since the slider exclusively performs linear movement, it is not necessary to forcibly bend and insert the flexible slider as in the conventional slider shown in FIG. Therefore, the trouble due to the bending of the elastic slider is eliminated, and the assembly work and the operation reliability are improved.

Also, one end of the lever is connected to a slider that moves straight,
The other end (operation part) of the lever moves while elastically contacting the side surfaces of the upper and lower cases by the force of the spring. Therefore, when the shutter is opened and closed, the lever moves in an arc along the front corners of the upper and lower cases as shown by the arrow B in FIG. 1 and the arrow F in FIG. The locus of this circular arc movement is a shape that escapes substantially along the outer circumference of the disk. Therefore, the space required for the movement of the lever is smaller than that of the conventional one provided with a link that rotates toward the disk side.
After all, the dead space becomes smaller, and the disc cartridge can be made smaller.

Further, since the lever moves in an arc shape, it is possible to maintain a sufficient distance from the outer circumference of the disk, and there is no concern that the outer circumference of the disk contacts the lever, and a stable rotating state of the disk can be secured.

Furthermore, when the shutter comes close to the open position, the movement amount of the shutter (slider) becomes smaller than the movement amount of the other end (operating portion) of the lever. Therefore, even if the pushing stroke of the disc cartridge varies a little, there is almost no positional variation in the shutter open position, and the shutter can be moved to a predetermined position. And has excellent operational reliability.

Further, one spring fulfills the two functions of urging the shutter in the closing direction and restricting the movement of the lever, so that the number of parts is small and the cost is prevented from increasing.

[Brief description of drawings]

1 to 5 are explanatory views showing an embodiment of a disk cartridge of the present invention, FIG. 1 is a plan view showing a main part of a lower case side, FIG. 2 is a front view including a cross-sectional portion, FIG. FIG. 3 is a side view including a cross-sectional portion, FIG. 4 is a plan view of relevant parts showing a state in which a shutter is opened, and FIG. FIG. 6 is an explanatory view schematically showing an example of a conventional disc cartridge, and FIG. 7 is an exploded perspective view showing another example of the conventional disc cartridge. 50 …… upper case, 51 …… lower case, 50a, 50b …… front, 5
6,57 …… Head insertion slot, 60 …… Short sleeve, 63 …… Tongue,
64 …… Slider, 65,66 …… Groove, 67 …… Projection, 68,69…
… Step, 70 …… Lever, 71,73,74 …… End, 72 …… Pin, 75 …… Side, 76 …… Protrusion, 77 …… Operating section, 78,80
...... Protrusion, 79 ...... Spring, 81R, 81L ...... Rising part, 82 ……
Part, 84 ... Locking part, 90 ... Front wall, 91 ... Recessed part.

Claims (1)

[Claims] 1. A cartridge case having an inner disk storage space and a head insertion opening at a predetermined position, an information recording disk rotatably stored in the disk storage space of the cartridge case, and a cartridge case of the cartridge case. A disk cartridge including a shutter that opens and closes the head insertion opening by moving along the front surface, and a spring that always elastically biases the shutter in the closing direction, and is integrally connected to the shutter. A slider that extends in the movement direction of the shutter and is arranged near the front surface of the cartridge case so as to be movable in the same direction as the shutter; a slider guide portion that guides the slider in a direction along the front surface of the cartridge case; Extends from one front corner in the disc cartridge insertion direction And a concave portion into which the locking portion of the disk drive device is inserted, the concave portion being disposed in the vicinity of the concave portion, one end rotatably connected to the slider, and the other end protruding into the concave portion. A member, the spring is locked between the cartridge case and the slider, and the elasticity of the spring biases the shutter in the closing direction through the slider, and the other end of the slider is always The locking portion is biased to move along the side surface of the concave portion, and the locking portion and the other end of the direction changing portion come into contact with each other as the locking portion of the disk drive device inserted into the concave portion of the cartridge case moves. The direction changing member moves in an arc shape in the front corner portion of the cartridge case, and the slider is displaced accordingly, and the shutter opens and closes the head insertion opening. Disk cartridge.