JP4423945B2 - Disc cartridge - Google Patents

Description

  The present invention relates to a disk cartridge containing a disk-shaped recording medium such as an optical disk.

  2. Description of the Related Art Conventionally, disk cartridges that store a disk-shaped recording medium such as an optical disk in a rotatable manner and are mounted on a recording and / or reproducing apparatus while the disk-shaped recording medium is stored are widely used. In this type of disc cartridge, the disc-shaped recording medium is accommodated in the cartridge main body, whereby the disc-shaped recording medium can be protected and can be easily inserted into and removed from the recording and / or reproducing apparatus.

  Since the disc cartridge can be mounted on the recording and / or reproducing apparatus while the disc-shaped recording medium is stored in the cartridge main body, a part of the disc-shaped recording medium is placed on the inner and outer circumferences of the cartridge main body. An opening for recording and / or reproduction facing outside is provided. A recording / reproducing head unit such as an optical pickup provided on the recording and / or reproducing device side faces the disc-shaped recording medium through the recording / reproducing opening, and a signal recording area of the disc-shaped recording medium is defined. The information signal is recorded or reproduced by scanning.

  By the way, if the recording and / or reproducing opening provided in the cartridge main body is left open, dust or the like may enter the cartridge main body when not in use such as storage that is not attached to the recording and / or reproducing apparatus. In addition, the disc-shaped recording medium stored in the cartridge body may be soiled.

  Therefore, a disk cartridge that houses a disk-shaped recording medium is provided with a shutter member for closing the recording and / or reproducing opening. In the disk cartridge provided with the shutter member, the recording member and / or reproducing opening portion is used to prevent the recording and / or reproducing opening portion from being opened when not in use such as during storage. There is provided one provided with a spring member for urging so as to close.

  A disk cartridge provided with an urging member such as a spring member for urging the shutter member in the closing direction for closing the recording and / or reproducing opening is disclosed in JP-A-9-91915 (Patent Document 1) There is.

  By the way, conventionally provided disk cartridges including a shutter member, including those described in Patent Document 1, the shutter member exclusively closes the shutter member for recording and / or reproducing openings than the biasing member. It is biased only in the closing direction.

  As described above, in order to reliably open the recording and / or reproducing opening which is blocked by the shutter member biased only in the closing direction, the shutter is further opened from the position where the recording and / or reproducing opening is opened. An overstroke for moving the member in the opening direction is required. As a result, the moving area of the shutter member becomes large, and it is difficult to reduce the size of the disk cartridge. When the disc cartridge having such an overstroke is mounted on a recording and / or reproducing apparatus and the shutter member is held in the open position against the urging force of the urging member, backlash occurs. Such a shutter member vibrates even with a slight impact, and it is difficult to hold the shutter member in an open position in a stable state. Such vibration of the shutter member affects the recording / reproducing characteristics of the recording and / or reproducing apparatus, and there is a possibility that good recording / reproducing characteristics may not be obtained.

  Further, in the recording and / or reproducing apparatus using the disk cartridge provided with the urging member that urges the shutter member only in the closing direction, as described above, the recording member and / or reproducing opening is provided on the shutter member. Since the holding mechanism for holding the biasing member against the biasing force of the biasing member is provided at the opened position, the mechanism on the recording and / or reproducing apparatus side becomes complicated. Further, the holding mechanism requires a mechanism having a holding force sufficient to hold the shutter member in the open position against the urging force of the urging member that urges the shutter member. Therefore, it is difficult to reduce the size and weight of the device itself.

JP-A-9-91915

  An object of the present invention is to provide a disc cartridge capable of reliably opening and closing a recording and / or reproducing opening provided in a cartridge body containing a disc-shaped recording medium.

  Another object of the present invention is to provide a disc cartridge that can reliably hold a shutter member that opens and closes a recording and / or reproducing opening provided in a cartridge body containing a disc-shaped recording medium at a closed position and an open position. Is to provide.

  Still another object of the present invention is to provide a disc cartridge that can be stably mounted on a recording and / or reproducing apparatus.

  Still another object of the present invention is to provide a disc cartridge that can be reduced in size by reducing the moving range of a shutter member that opens and closes a recording and / or reproducing opening.

  Still another object of the present invention is to provide a disc cartridge that can simplify the mechanism of a recording and / or reproducing apparatus to be mounted and contribute to downsizing of the apparatus itself.

  A disc cartridge according to the present invention proposed to achieve the above-described object includes a disc-shaped recording medium and a disc-shaped recording medium rotatably accommodated, and a part of the disc-shaped recording medium is disposed on the inner and outer circumferences. A cartridge main body provided with a recording and / or reproducing opening that faces outward, a shutter member that is movably supported by the cartridge main body and opens and closes the recording and / or reproducing opening, and a shutter member A bi-directional biasing mechanism that selectively biases the recording and / or reproducing opening to either the closed position or the recording and / or reproducing opening.

  The bi-directional biasing mechanism used in the disk cartridge according to the present invention has a direction or recording in which the shutter member is recorded and / or the reproducing opening is closed depending on the position of the shutter member with respect to the recording and / or reproducing opening. And / or selectively urging in one of the directions in which the opening for reproduction is opened.

  Here, the two-way biasing mechanism is provided on the upstream side in the moving direction in which the shutter member opens the recording and / or reproducing opening.

  Specifically, the two-way urging mechanism includes a torsion coil spring connected between the shutter member and the cartridge body.

  The torsion coil spring constituting the two-way urging mechanism is provided with a first coil portion at an intermediate portion and a pair of arm portions extending from the first coil portion. A second coil portion wound in the direction opposite to the coil portion and the winding direction is provided, the second coil portion is supported by a part of the cartridge body, and the other arm portion is supported by the shutter portion to thereby provide a shutter. The member is biased in either the direction of closing or opening the recording and / or reproducing opening.

  In addition, the torsion coil spring has a substantially U-shape bent at the tip of the other arm portion, and has an extended portion extending from the other arm portion and / or a bent portion bent in parallel with the extended portion. A locking portion having a predetermined angle with the extending direction of the other arm portion is formed, and this locking portion is locked to the shutter member.

  The two-way urging mechanism is rotatably supported by the cartridge body, and when the shutter member moves in a direction to open and close the recording and / or reproducing opening by a pressing operation portion provided on the shutter member. And a biasing member that pivots and biases the pivoting member toward the pressing operation portion. The pivoting member is used for recording and / or reproducing the shutter member. A first inclined surface for guiding the shutter member in a direction for closing the recording and / or reproducing opening according to the position with respect to the opening, and a guide for guiding the shutter member in the direction for opening the recording and / or reproducing opening. The thing provided with the 2nd inclined surface to do can be used.

  In this two-way urging mechanism, the rotating member and the urging member can be integrally formed by a leaf spring.

  Further, when the shutter member is moved to a position where the recording and / or reproducing opening is closed, the two-way urging mechanism engages with a pressing operation portion provided on the shutter member to bring the shutter member into the closed position. When the first engaging protrusion to be held and the shutter member are moved to a position where the recording and / or reproducing opening is opened, the shutter member is released by engaging with the pressing operation portion provided on the shutter member. A leaf spring provided with a second engagement protrusion held in position can be used.

  In the cartridge main body constituting the disc cartridge according to the present invention, the insertion end side to the recording and / or reproducing apparatus is a substantially semicircular arc-shaped portion centering on the center of the disc-shaped recording medium housed in the cartridge main body. The recording and / or reproducing opening is formed so as to face a side surface other than the side surface of the cartridge body that is an arcuate portion. In the disk cartridge having this configuration, the side surface on which the shutter member moves is a surface parallel to the moving direction of the shutter member.

  Since the disk cartridge according to the present invention urges the shutter member by the two-way urging mechanism, the shutter member is in the position where the recording and / or reproducing opening is closed or opened by the two-way urging mechanism. Therefore, the recording and / or reproducing opening is held in a closed position or an opened position without providing a mechanism for holding the shutter member on the recording and / or reproducing apparatus side. In addition, the recording and / or reproducing opening can be closed and opened.

  The bi-directional biasing mechanism opens the recording member and / or reproducing opening or the recording and / or reproducing opening depending on the position of the shutter member relative to the recording and / or reproducing opening. Since the shutter member is selectively urged in one of the directions, the shutter member closes or opens the recording and / or reproducing opening in connection with the insertion and removal of the disk cartridge from the recording and / or reproducing apparatus. The recording and / or reproducing opening is reliably closed and opened.

  In the disc cartridge according to the present invention, the shutter member is urged in the opening direction in addition to the direction of closing the recording and / or reproducing opening by the two-way urging mechanism, so that the shutter member is moved to the open position. Therefore, it is not necessary to provide an overstroke, and the movement area of the shutter member can be small. As a result, the disk cartridge itself can be reduced in size.

  In the disk cartridge according to the present invention, since the two-way biasing mechanism is arranged on the upstream side in the moving direction in which the shutter member opens the recording and / or reproducing opening, the space of the cartridge main body is effectively used. It can arrange | position using and can contribute to size reduction.

  Furthermore, since the recording and / or reproducing apparatus using the disk cartridge according to the present invention does not require a mechanism for holding the shutter member in the open position, the mechanism of the recording and / or reproducing apparatus can be simplified. Thus, the device itself can be reduced in size.

  Furthermore, the disc cartridge according to the present invention has the recording body of the cartridge main body containing the disc-shaped recording medium and / or the insertion end of the cartridge main body centered on the center of the disc-shaped recording medium accommodated in the cartridge main body. Since it is a semicircular arc-shaped portion, it can be reduced in size according to the size of the disc-shaped recording medium to be stored, and the side surface where the recording and / or reproducing opening is the arc-shaped portion of the cartridge body The shutter member can be attached to the cartridge main body so as to be stably movable, and the recording and / or reproducing opening can be reliably closed.

  Furthermore, the disk cartridge according to the present invention has a two-way biasing mechanism, a first coil portion is provided in the middle portion, and a pair of arm portions are extended from the first coil portion. If the tip is formed by a torsion coil spring provided with a second coil part wound in the direction opposite to the first coil part, the thickness of the entire torsion coil spring is suppressed and the disk cartridge is made thinner. Can be planned.

  Hereinafter, a disk cartridge according to the present invention will be specifically described with reference to the drawings.

  A disk cartridge 1 according to the present invention is a disk-shaped recording medium, for example, an optical disk 2 that is rotatably accommodated. As shown in FIGS. 1 and 2, a pair of upper and lower halves 2 and 3 are butt-joined. The cartridge main body 4 is provided, and the optical disk 2 is rotatably accommodated in the cartridge main body 4.

  The disc cartridge 1 according to the present invention contains, for example, an optical disc 2 on which program data for executing a television game and video data are recorded, and is extremely small. The disc cartridge 1 contains, for example, a small-diameter optical disc 2 having a diameter of about 60 mm, and is formed in a size that can be accommodated in the palm of one hand.

  The disc cartridge 1 shown here contains a read-only optical disc 2 in which information signals such as program data are recorded in advance.

  The upper and lower halves 3 and 4 constituting the cartridge body 5 for storing the optical disk 2 are formed by molding a synthetic resin material, and rising peripheral walls 3a and 4a are formed on the outer periphery. The upper and lower halves 3 and 4 are joined by abutting each of the rising peripheral walls 3 a and 4 a, thereby constituting a disk housing portion 6 and constituting a cartridge body 5. The upper and lower halves 3 and 4 constitute a cartridge main body 5 by joining welding protrusions projecting on opposite inner surfaces of the upper and lower halves 3 and 4 using a welding method such as an ultrasonic welding method.

As shown in FIGS. 1 to 3, the cartridge main body 5 constituting the disk cartridge 1 is a front surface that is one side surface serving as an insertion end side to a disk recording and / or reproducing apparatus into which the disk cartridge 1 is inserted and removed. Is formed as an arcuate portion 7. As shown in FIG. 2, the arc-shaped portion 7 is formed in a substantially semicircular arc shape with the radius R ₁ being constant with the center P ₀ being the center of the optical disc 2 accommodated in the disc accommodating portion 6 of the cartridge body 5. Has been. That is, the arcuate portion 7 is formed as a semicircle that faces a portion corresponding to a semicircle of the optical disk 2 stored in the cartridge body 5.

  Opposite side surfaces that are continuous with the arc-shaped portion 7 of the cartridge body 5 are formed as side surfaces 8 and 9 that are parallel to each other, and a back surface that faces the arc-shaped portion 7 is gently curved and formed as a continuous curved portion 10. Has been.

  In the disk cartridge 1 according to the present invention, the front surface, which is one side that becomes the insertion end side, is formed as a substantially semicircular arc-shaped portion 7 that is largely curved as compared with the other surface. When inserting into a disc recording and / or reproducing apparatus that is inserted / removed by the method, the direction of insertion into the recording and / or reproducing apparatus can be easily determined. In particular, in the case of the disc cartridge 1 that is small enough to be housed in the palm, it is possible to identify the insertion direction even with a hand gripping feeling. It can also be attached to a playback device. In addition, as will be described later, the disk cartridge 1 can be easily inserted into a slot-in type disk recording and / or reproducing apparatus, and can be surely inserted.

  Furthermore, the disc cartridge 1 according to the present invention has a substantially semicircular arc-shaped portion 7 on the insertion end side and a curved portion 10 on the back surface facing the arc-shaped portion 7. Further downsizing has been realized.

  As shown in FIGS. 2 and 3, the center hole 11 formed at the center of the optical disk 2 housed in the cartridge body 5 and the periphery thereof are externally attached to the center of the lower half 4 constituting the lower surface side of the cartridge body 5. A circular central opening 12 is formed so as to face the direction. A part of a disk rotation driving mechanism provided on the side of the disk recording and / or reproducing apparatus on which the disk cartridge 1 is mounted, for example, a turntable, enters the central opening 12.

  As shown in FIGS. 2 and 3, a head opening 13 which is a recording and / or reproducing opening is formed in the lower half 4 constituting the lower surface side of the cartridge body 5. The head opening 13 is located on one side surface 8 of the cartridge body 5 and is large enough to allow a part of the signal recording area of the optical disk 2 accommodated in the cartridge body 5 to face outward over the inner and outer circumferences. It is formed in a rectangular shape. That is, the head opening 13 is formed so as to face the side surface 8 that is a straight flat surface other than the front surface where the arc-shaped portion 7 of the cartridge body 1 is formed.

  In the disk cartridge 1 according to the present invention, a shutter member 15 for opening and closing the head opening 13 is movably attached. The shutter member 15 is formed in a rectangular shutter shape 16 formed in a rectangular shape large enough to close the head opening 13, and a U-shaped cross section formed on the substrate portion side of the shutter portion 16. The support part 17 is provided.

  The shutter member 15 is formed by punching and bending a thin metal plate or by forming a synthetic resin material.

  By the way, the shutter member 15 is supported so as to be movable in an arrow A direction or an arrow B direction in FIG. 2 that supports the upper half 3 side constituting the cartridge body 5 by the support portion 17 and opens and closes the head opening portion 13. Yes. That is, as shown in FIG. 4, the shutter member 15 is movable to the cartridge body 5 by supporting the slide guide portion 18 formed by a part of the rising peripheral wall 3 a formed in the upper half 3 by the support portion 17. It is attached.

  As shown in FIGS. 4 and 5, a connecting piece 21 is formed on the support portion 17 provided on the shutter member 15 so as to rise vertically from the base end portion of the shutter portion 16. A first engagement piece 22 that is bent toward the shutter portion 16 side is provided at the distal end portion of the first engagement portion 22. On both sides of the connecting piece 21, there are provided second engaging pieces 23 bent in an L shape at a position one step lower than the portion where the first engaging pieces 22 are formed. The second engagement piece 23 is bent in an L shape so that the tip end side protrudes toward the first engagement piece 22.

  As shown in FIG. 2, the shutter member 15 is disposed in the cartridge body 5 so that the shutter portion 16 extends over the head opening portion 13. At this time, as shown in FIGS. 6 and 7, the shutter member 15 engages the engagement groove 24 formed on the side surface of the slide guide portion 18 with the first engagement piece 22 provided in the support portion 17. By engaging the L-shaped second engagement piece 23 with the distal end side of the slide guide portion 18, the support portion 17 is supported by the first and second engagement pieces 22 and 23. The shutter member 15 supported in this manner is guided by the support portion 17 and moves in the direction of arrow A or arrow B in FIG.

  A concave shutter slide portion 19 is formed in an area where the shutter portion 16 of the lower half 4 moves. The shutter slide portion 19 is formed with a depth sufficient to prevent the shutter portion 16 from protruding from the surface of the cartridge body 5.

  In the disk cartridge 1 according to the present invention, as shown in FIGS. 4 and 7, a notch 25 is formed in a portion of the rising peripheral wall 4 a formed in the lower half 4 that faces the head opening 13. It is open. In other words, the head opening 13 is formed by opening a region extending from the inner peripheral side of the cartridge body 5 to the outer peripheral edge.

  Further, at least a portion of the slide guide portion 18 formed on the upper half 3 side that faces the head opening portion 13 is mounted on the cartridge mounting portion in the disk recording and / or reproducing apparatus by positioning in the height direction. When the optical disc 2 in the disc cartridge 1 is positioned and mounted on the turntable, it is formed as a height H1 that does not protrude from the lower surface 2a facing the lower half 4 of the optical disc 2, as shown in FIG. ing.

  The disk cartridge 1 formed in this manner is configured so that the entire optical pickup, which is a head portion for reading an information signal recorded on the optical disk 2 when the shutter member 15 is moved and the head opening 13 is opened, is a cartridge body. The objective lens for condensing the light beam for scanning the signal recording area of the optical disk 2 when the optical pickup is moved to a position for scanning the outer peripheral side of the optical disk 2 as well as being positioned within the cartridge 5 Other optical block portions can be positioned outside the cartridge main body 5 while being positioned in the main body 5.

  As a result, the disc cartridge 1 according to the present invention can be positioned over the inside and outside of the cartridge body 5 while bringing the optical pickup close to the optical disc 2, so that the signal recording area is formed up to the outer periphery of the optical disc 2. And the recording capacity recorded on the optical disc 2 can be increased. Furthermore, since the optical pickup can be brought close to the optical disc 2, the numerical aperture (NA) of the objective lens can be increased, and the beam spot of the light beam focused on the signal recording area of the optical disc 2 can be reduced. It is possible to improve the recording density of the information signal recorded on. Furthermore, since the recording density can be improved as the recording capacity increases, the diameter of the optical disc 2 that requires a certain amount of recording capacity can be reduced. Furthermore, since the optical pickup 2 can be scanned by positioning the optical pickup so as to extend inside and outside the cartridge main body 5, the cartridge main body 5 can be reduced in size, and a disk recording and / or reproducing apparatus using the disk cartridge 1 can be realized. Miniaturization can also be realized.

  In the disk cartridge 1 according to the present invention, the shutter member 15 that opens and closes the head opening 13 is attached so as to move along the flat side surface 8 of the cartridge body 5 as shown in FIGS. Yes. Therefore, the shutter member 15 is linearly moved while keeping the support portion 17 along the flat side surface 8, so that a stable movement operation is realized.

  Further, since the head opening 13 is formed at a position facing the flat side surface 8 of the cartridge body 5, the portion where the notch 25 formed on the lower half 4 side is also formed in a linear surface. It is said that. Therefore, even if the opening 13 for the head is formed with the notch 25 and the side 8 facing the outside of the cartridge body 5 is opened, the whole is formed in a rectangular shape and has a straight U-shaped cross section. Therefore, the shutter member 15 having the support portion 17 can be reliably closed.

  The disk cartridge 1 according to the present invention is provided with a lock mechanism 27 that restricts the movement of the shutter member 15 when the shutter member 15 is moved to a position that closes the head opening 13. As shown in FIGS. 5 and 8, the lock mechanism 27 of the shutter member 15 is provided on a lock lever 28 rotatably attached to the shutter member 15 and on the cartridge body 5 side with which the lock lever 28 is engaged. And an engaging portion 29.

  As shown in FIGS. 5 and 8, the lock lever 28 has a pressing operation portion 30 rising along the side edge on one end side, and an engagement piece 31 engaging with the engagement portion 29 on the other end side. It is formed as a long plate-shaped member formed. The lock lever 28 is rotatably attached to a lock lever attachment piece 32 provided on the shutter member 15. The lock lever mounting piece 32 is formed so as to protrude from the upper end edge of the connecting piece 21 constituting the slide guide portion 18 of the shutter member 15 to the side of the shutter portion 16.

  As shown in FIGS. 1, 6, and 8, the lock lever 28 has a pressing operation portion 30 on one end side facing a rectangular window portion 33 formed in a substantially central portion of the connecting piece 21, and is substantially in the central portion. The pivot support hole 34 drilled in the shaft is pivotally supported on a support shaft 35 upright on the lock lever mounting piece 32, and is mounted so as to be rotatable about the support shaft 35. At this time, the engagement piece 31 provided on the other end side of the lock lever 28 protrudes to the side of the shutter portion 16 along the lock lever attachment piece 32.

  Note that a window 33 provided on the connecting piece 21 of the shutter member 15 is a shutter member movement regulating spring that regulates the movement of the shutter member 15 provided on the disk recording and / or reproducing apparatus side where the disk cartridge 1 is mounted. Is the part that engages.

  The lock lever 28 supported by the shutter member 15 is urged to rotate in the direction of arrow C in FIG. 8 by which the pressing operation unit 30 protrudes from the window 33 by a rotation urging spring 37 wound around the support shaft 35. Has been. The rotation urging spring 37 is constituted by a torsion coil spring, and one arm portion 37a is locked to the pressing operation portion 30 and the other arm portion 37b is locked to the inner surface of the connecting piece 21 on the shutter member 15 side. Thus, the lock lever 28 is urged to rotate in the direction of arrow C in FIG.

  The lock lever 28 is restricted in its rotation biasing position by the rotation biasing spring 37 by abutting one end side where the pressing operation portion 30 is formed on the connecting piece 21.

  As described above, the shutter member 15 to which the lock lever 28 is attached as described above is movably attached to the cartridge body 5 by supporting the support portion 17 on the upper half 3.

  When the shutter member 15 is in a position to close the head opening 13 as shown in FIGS. 6 and 8, the lock lever 28 receives the urging force of the rotation urging spring 37 in the direction of arrow C in FIG. It is rotated and the pressing operation part 30 is made to enter the window part 33 provided in the connecting piece 21. At this time, the lock lever 28 engages the engagement piece 31 formed on the other end side with the engagement portion 29 provided on the cartridge body 5 side, restricts the movement of the shutter member 15, and opens the head opening 13. The shutter 16 is held closed.

  The engagement portion 29 provided on the cartridge body 5 side is the inner surface of the lower half 4 outside the area of the disk storage portion 6, and the engagement piece 31 of the lock lever 28 is engaged when the shutter member 15 is in the closed position. It is formed at a position where it can be combined. The engaging portion 29 is formed integrally with the lower half 4. The engaging portion 29 is formed with an engaging concave portion 29a having one side open, and the engaging piece 31 on the lock lever 28 side is engaged with the engaging concave portion 29a.

  The lock lever 28 that locks the shutter member 15 in the closed position restricts the movement of the shutter member that enters and engages the window 33 provided in the connecting piece 21 when the disc cartridge 1 is inserted into the disc recording and / or reproducing apparatus. The pressing operation unit 30 is pressed by the spring and rotated in the direction of arrow D in FIG. 8 against the urging force of the rotation urging spring 37. When the lock lever 28 rotates in the direction of arrow D in FIG. 8, as shown in FIG. 9, the engagement piece 31 is disengaged from the engagement recess 29a of the engagement portion 29, the shutter member 15 is unlocked, and the shutter member 15 is movable in the direction of arrow A in FIG. 2 in the direction of opening the head opening 13.

  The opening / closing of the head opening 13 is performed by relative movement of the cartridge body 5 and the shutter member 15, and details of the opening / closing operation of the head opening 13 will be described later.

  In the shutter member locking mechanism 27 described above, the lock lever 28 that locks the shutter member 15 in the closed position is attached to the shutter member 15 that moves relative to the cartridge main body 5, so that the opening 13 for the head is followed. It can be moved integrally with the shutter member 15. As a result, when the shutter member 15 is in a position where the head opening 13 is closed, the lock lever 28 can be disposed with at least the pressing operation unit 30 side positioned on the head opening 13. Miniaturization can be realized. That is, when the lock lever 28 is provided on the cartridge main body 5 side, it is necessary to provide a space for arranging the entire lock lever 28 on the cartridge main body 5 side. However, the disc cartridge 1 according to the present invention requires that. In addition, since only the engaging portion 29 with which the lock lever 28 is engaged is provided on the cartridge body 5 side, the cartridge body 5 can be further reduced in size.

  By the way, the disk cartridge 1 according to the present invention realizes the reliable movement of the shutter member 15 that opens and closes the head opening 13, and further, the shutter member 15 is located at a position where the head opening 13 is opened or closed. A two-way urging mechanism 38 is provided so as to securely hold it. The two-way urging mechanism 38 has a function of moving and urging the shutter member 15 in the direction of opening or closing the head opening 13 according to the movement position of the shutter member 15 relative to the cartridge body 5. Configure the opening and closing mechanism.

  The two-way urging mechanism 38 is configured by using a two-way urging member that selectively moves and urges the shutter member 15 in two directions, that is, a direction in which the head opening 13 is opened and a direction in which the shutter opening 15 is closed. Specifically, as shown in FIG. 8, a torsion coil spring 39 is used for the two-way urging member. The torsion coil spring 39 is suspended between the shutter member 15 and the cartridge body 5. As shown in FIG. 8, the torsion coil spring 39 is disposed on the side where the shutter member 15 moves in the direction of opening the head opening 13. That is, the torsion coil spring 39 is disposed on the upstream side from the position where the shutter member 15 closes the head opening 13 to the position where the shutter member 15 opens.

  By the way, since the upstream side in the moving direction of the shutter member 15 is a direction away from the head opening 13, the head opening 13 is opened by disposing the bi-directional biasing mechanism 38 on the upstream side. In this case, it is possible to prevent the torsion coil spring 39 constituting the two-way urging mechanism 38 from projecting into the head opening 13, and the head opening 13 can be greatly opened.

  Further, in the disc cartridge 1 according to the present invention, the upstream side in the moving direction of the shutter member 15 is a corner portion on the back side opposite to the insertion end to the disc recording and / or reproducing device, and has a marginal space. Since it can be configured, the bidirectional biasing mechanism 38 can be arranged in the cartridge body 5 efficiently.

  The torsion coil spring 39 constituting the two-way urging mechanism 38 has the tip of one arm portion 39a engaged with the engagement hole 40 formed in the tip of the lock lever mounting piece 32, and the tip of the other arm portion 39b. The provided annular portion 41 is attached by engaging with a support pin 42 protruding from the inner surface of the cartridge body 5.

  When the shutter member 15 is in a position to close the head opening 13, the torsion coil spring 39 is biased in the direction of arrow B in FIG. 8 so as to maintain the state in which the head opening 13 is closed. The torsion coil spring 39 is a direction in which the disk cartridge 1 is mounted on a disk recording and / or reproducing apparatus, the lock by the shutter member locking mechanism 27 is released, and the shutter member 15 opens the head opening 13 with respect to the cartridge body 5. When the relative movement in the direction of arrow A in FIG. 8 is performed, the position of the coil portion 39c formed in the center portion that is not fixed moves in the direction of arrow A of the movement direction of the shutter member 15. When the coil portion 39c further moves in the direction of arrow A and the torsion coil spring 39 exceeds the position of the support pin 42 located on the moving direction side of the shutter member 15 as shown in FIG. When the urging direction is reversed, the torsion coil spring 39 urges the shutter member 15 to move in the direction of arrow A in FIG. 10, and opens the head opening 13 as shown in FIGS. The head opening 13 is held in the open position by moving in the direction of arrow A.

  When an ejection operation is performed to take out the disk cartridge 1 held at the position where the shutter member 15 opens the head opening 13 from the disk recording and / or reproducing apparatus, the shutter member 15 moves the arrow B in FIG. The central coil portion 39c also moves in the direction of arrow B in the same direction. When the shutter member 15 further moves in the direction of the arrow B and the coil portion 39c exceeds the position of the support pin 42 located on the moving direction side of the shutter member 15, the torsion coil spring 39 is reversed in urging direction. When the urging direction is reversed, the torsion coil spring 39 urges the shutter member 15 to move in the direction of arrow B in FIG. 9 and moves in a direction to close the head opening 13 to move the head opening. 13 is held in the closed position.

  Thus, the shutter member 15 urged by the torsion coil spring 39 constituting the two-way urging mechanism 38 applies the urging force of the torsion coil spring 39 to the respective positions where the head opening 13 is closed and opened. Since it is received and supported, it is possible to reliably maintain the state where the head opening 13 is closed or opened.

  The disk recording and / or reproducing apparatus using the disk cartridge 1 does not need to be provided with a mechanism for holding the shutter member 15 at the position where the head opening 13 is opened against the urging force of the urging member. Therefore, the mechanism of the disk recording and / or reproducing apparatus can be simplified, and the apparatus itself can be reduced in size.

  Further, in the disk cartridge 1 according to the present invention, the direction in which the head opening 13 is opened or closed by the bi-directional biasing mechanism 38 according to the position of the shutter member 15 with respect to the head opening 13 provided in the cartridge body 5. Accordingly, the head opening 13 can be reliably opened or closed in connection with the insertion / removal of the disk cartridge 1 into / from the disk recording and / or reproducing apparatus.

  Furthermore, in the disk cartridge 1 according to the present invention, since the shutter member 15 is urged to move to the side where the head opening 13 is opened by the two-way urging mechanism 38, the shutter member 15 is moved through the head opening 13. It is not necessary to provide an overstroke for moving to the open position, the movement area of the shutter member 15 is small, and the size of the disk cartridge 1 itself can be reduced.

  In the disk cartridge 1 described above, the shutter member lock mechanism 27 is provided to hold the shutter member 15 at the position where the head opening 13 is closed, but only the two-way urging mechanism 38 may be provided. Good. By providing the shutter member locking mechanism 27, it is more reliably regulated that the shutter opening 15 is inadvertently opened due to the movement of the shutter member 15 when the disk cartridge 1 is not in use or the like. The stored optical disk 2 can be protected.

  Further, the disc cartridge 1 according to the present invention has a disc recording and / or reproducing apparatus side on one side surface 8 of the cartridge main body 5 to which the shutter member 15 is attached, as shown in FIGS. A guide groove 43 into which a shutter member releasing operation piece provided on the door enters is provided.

  As shown in FIGS. 2 and 3, positioning pins provided on the disk recording and / or reproducing device side engage with both sides of the lower surface side of the cartridge main body 5 on the back side which is the curved portion 10. First and second positioning holes 43 and 44 are provided. The second positioning hole 44 is formed as a long hole having a major axis in the width direction orthogonal to the moving direction of the shutter member 15 in order to adjust the engaging position of the positioning pin.

  Further, as shown in FIGS. 1 and 2, the side surfaces 8 and 9 of the arcuate portion 7 of the cartridge body 5 are provided on the side of the disk recording and / or reproducing apparatus on which the disk cartridge 1 is mounted. The engaging recesses 45 and 46 for loading with which a part of the cartridge loading mechanism to be engaged is engaged are provided.

  Furthermore, as shown in FIG. 2, a part of the ejection mechanism provided on the recording and / or reproducing apparatus side is engaged with the portion of the arcuate portion 7 of the cartridge body 5 located on the other side surface 9 side. An engaging recess 47 for ejection is provided.

  Furthermore, identification holes and identification recesses for identifying the type of the optical disk 2 to be accommodated are provided on the side surfaces 8, 9 or the bottom surface of the cartridge body 5 as necessary.

  Next, an example of a disk recording and / or reproducing apparatus using the above-described disk cartridge 1 will be described.

  The disc cartridge 1 according to the present invention stores an optical disc 2 on which program data for executing a television game and video data are recorded, for example. Therefore, as a disk recording and / or reproducing apparatus using the disk cartridge 1 according to the present invention in which this type of optical disk 2 is housed, the disk cartridge 1 is mounted and recorded at least on the optical disk 2 as shown in FIG. A disk drive device 50 having a device main body 51 incorporating a disk drive unit for reproducing data and a display unit 52 for displaying image data and character data reproduced from the optical disk 2 is used.

  The disk drive device 50 shown in FIG. 13 is provided with a cartridge loading mechanism having a cartridge holder for mounting the disk cartridge 1 in the disk drive unit (not shown) in the apparatus main body 51 incorporating the disk drive unit. It has been. A cartridge insertion / removal port 53 for inserting the disk cartridge 1 into the cartridge holder and ejecting the disk cartridge 1 mounted on the cassette holder is provided on the front surface constituting one side of the apparatus main body 1. The cartridge insertion / removal port 53 is formed as an opening that is large enough to allow the disk cartridge 1 to be inserted and removed, and has a width W2 that is slightly larger than the width W1 of the disk cartridge 1 inserted therein. It is formed in a rectangular shape having a height H2 slightly larger than the thickness D1. A cartridge holder 54 is disposed in the apparatus main body 51 so as to face the cartridge insertion / removal port 53.

  An eject button 55 for ejecting the disc cartridge 1 held by the cartridge holder 54 is provided on one side of the front side of the apparatus main body 51.

  On one side of the upper surface of the apparatus main body 51, for example, operation buttons 56 and 57 of a control switch used when executing a television game are provided, and an image displayed on the display unit 52 is displayed on the other side. A control key 58 for scrolling is provided, and a speaker 59 for emitting an audio signal reproduced from the optical disc 2 is further provided.

  Although not shown, the device main body 51 is provided with a control bobbin such as a playback button for controlling the disk drive unit, a power switch operation button, and the like.

  The display unit 52 is positioned on the back side opposite to the front side where the cartridge insertion / extraction port 53 of the apparatus main body 51 is provided, and is rotatably attached to the apparatus main body 51 via a hinge mechanism 60. . The display unit 52 is superimposed on the upper surface of the apparatus main body 51 by being rotated toward the apparatus main body 51 side. The display unit 52 is configured using a liquid crystal display panel.

  Next, a state where the disk cartridge 1 according to the present invention is mounted on the disk drive device 50 having the above-described configuration will be described.

  To mount the disc cartridge 1 in the disc drive device 50, as shown in FIG. 13, the disc cartridge 1 is inserted into the device main body 51 from the cartridge insertion / removal port 53 with the distal end side where the arc-shaped portion 10 is formed as the insertion end. 54.

  By the way, the disk cartridge 1 according to the present invention is formed as a substantially semicircular arc-shaped portion 10 on the insertion end side with respect to the cartridge insertion / removal port 53, so that the width direction with respect to the center line P 1 in the width direction of the cartridge insertion / removal port 53 Even when the center line P2 is inserted with a large inclination, it can be smoothly inserted into the cartridge insertion / removal port 53 and securely held in the cartridge holder 54.

  That is, the disc cartridge 1 having the insertion end of the arc-shaped portion 10 having a substantially semicircular shape has a center line P2 in the width direction with respect to the center line P1 in the width direction of the cartridge insertion / extraction port 53, as shown in FIG. Is inserted into the cartridge insertion / removal port 53 in a state inclined to about 45 degrees in either the left or right direction, the semicircular arcuate portion 10 side can be inserted into the apparatus main body 51 largely. At this time, as shown in FIG. 16, the disc cartridge 1 is centered on a part of the arcuate portion 10 that is in contact with any one side surface of the cartridge insertion / removal port 53 during insertion into the cartridge insertion / removal port 53. The posture can be easily corrected by rotating in the direction in which the center lines P1 and P2 coincide. As described above, the disk cartridge 1 according to the present invention can be securely mounted to the cartridge holder 54 even if the insertion direction with respect to the cartridge insertion / removal port 53 is greatly displaced.

  The disc cartridge 1 inserted into the cartridge holder 54 is further inserted into the cartridge holder 54, whereby the shutter member 15 is moved relative to the cartridge body 5 and the head opening 13 is opened. That is, as shown in FIG. 17, when the disc cartridge 1 is inserted partway through the cartridge holder 54, a part of the side wall of the L-shaped cartridge support portion 61 provided on one side of the cartridge holder 54 is removed. A part of the shutter member movement regulating spring 62 formed by cutting and raising enters the window 33 formed in the connecting piece 21 of the shutter member 15 and presses the pressing operation unit 30, and the lock lever 28 in FIG. Rotate in the direction of arrow D. When the lock lever 28 is rotated in the direction of arrow D in FIG. 9, the engagement of the engagement piece 31 with the engagement portion 29 is released and the lock of the shutter member 15 with respect to the cartridge body 5 is released. The shutter member 15 is movable relative to the cartridge body 5 when the lock on the cartridge body 5 is released.

  The cartridge holder 54 to which the disc cartridge 1 according to the present invention is mounted is further provided with a shutter release operation piece 63. When the disc cartridge 1 is inserted to a position where the shutter member 15 is unlocked, the shutter release operation piece 63 enters the guide groove 43 formed on one side surface 8 of the cartridge body 5, and It is provided at a position that contacts the side.

  When the disc cartridge 1 is inserted into the cartridge holder 54 to a position where the shutter member 15 is unlocked, the shutter release operation piece 63 comes into contact with one side of the shutter member 15 as shown in FIG. The movement of the shutter member 15 relative to the cartridge body 5 is restricted. When the disc cartridge 1 is further inserted from the position shown in FIG. 17 in the direction of arrow E toward the inside of the cartridge holder 54, the cartridge main body 5 moves in the direction of arrow E, and as shown in FIG. Is released.

  When the cartridge main body 5 moves in the direction of arrow E in FIG. 17 where the head opening 13 is opened while the movement of the shutter member 15 is restricted, the disk cartridge 1 is as shown in FIGS. 9 and 10 described above. Further, the torsion coil spring 39 constituting the shutter opening / closing mechanism 38 is biased. When the cartridge body 5 is moved in the direction of arrow E in FIG. 17 and the coil portion 39c is biased to a position exceeding the position of the support pin 42 located on the moving direction side of the shutter member 15, the torsion coil spring 39 is biased. Is reversed, and the shutter member 15 is moved in the direction of arrow F in FIG. 17 opposite to the direction of movement of the cartridge body 5, and as shown in FIGS. 11 and 12, and FIG. Is released. At this time, the shutter member 15 is biased to open the head opening 13 by the torsion coil spring 39, so that the head opening 13 is reliably maintained in the open state.

  The disk cartridge 1 inserted into the cartridge holder 54 with the head opening 13 opened by the operation as described above is positioned and mounted on a cartridge mounting section provided in the disk drive device 50. At this time, the optical disk 2 is positioned and mounted on the disk drive unit. Here, by driving the disk drive unit, the program data recorded on the optical disk 2 is reproduced and the program is executed.

  Then, after the optical disk 2 is reproduced, the disk cartridge 1 loaded in the disk drive device 50 is ejected by operating the eject button 55. When the eject button 55 is operated, the eject operation of the disk cartridge 1 mounted on the cartridge mounting portion is executed. When the ejection operation is executed, further detailed explanation is omitted, but the shutter member 15 is moved relative to the cartridge body 5 by an operation opposite to the above-described operation, and the head opening 13 is closed. It returns to the initial state where it is locked at the position where the head opening 13 is closed. As the shutter member 15 returns to the closed position, the cartridge is ejected from the cartridge insertion / removal port 53, and the ejection operation of the disk cartridge 1 attached to the disk drive device 50 is completed.

  In the disk cartridge according to the present invention, a torsion coil spring that selectively biases the shutter member to a position for opening and closing the head opening 13 may be configured as follows. In the following description, the same members as those of the disk cartridge 1 are denoted by the same reference numerals and their details are omitted.

  As shown in FIGS. 19A and 19B, the torsion coil spring 70 includes a first arm portion 70a that is locked to the shutter member 80 via a first coil portion 71 provided at an intermediate portion. The second arm portion 70b supported by a part of the cartridge body 5 is formed.

The first coil portion 71 is formed to have a predetermined thickness by being wound a plurality of times, and the first arm portion 70a is extended from one end side 71a in the thickness direction. A second arm portion 70b extends from the end side 71b. The first arm portion 70 a extending from the first coil portion 71 has a locking portion 74 that is locked to the shutter member 15 at the tip portion. The locking portion 74 is bent at a substantially right angle from the extending direction of the extending portion 74a to the winding direction of the first coil portion 71, extending from the distal end portion of the first arm portion 70a. The rising portion 74b and the tip of the rising portion 74b are further composed of a bent portion 74c that is bent substantially in parallel with the first arm portion 70a, and the whole is formed in a substantially U-shape. Bent portion of the engaging portion 74 74c is bent from the extending direction of the first arm portion 70a has a predetermined angle theta _1. The engaging portion 74 supports the torsion coil spring 70 on the shutter member 15 by engaging with an engaging hole 83 formed at the tip of the coil spring mounting piece 82 of the shutter member 80.

  As shown in FIG. 20, the shutter member 80 that supports the torsion coil spring 70 is attached to the cartridge body 5 so that the head opening 13 can be freely opened and closed, and has a rectangular size sufficient to close the head opening 13. The flat shutter part 16 formed in the shape and the support part 17 formed in the cross-sectional U-shape formed in the board | substrate part side of the shutter part 16 are provided.

  A connecting piece 21 is formed in the support portion 17 so as to rise vertically from the base end portion of the shutter portion 16. The connecting piece 21 is bent toward the shutter portion 16 side at the distal end portion of the connecting piece 21. A first engagement piece 22 that is engaged with the first engagement piece 22 is provided. On both sides of the connecting piece 21, there are provided second engaging pieces 23 which are bent into an L shape and engaged with the slide guide portion 18 at a position one step lower than the portion where the first engaging pieces 22 are formed. ing.

  The connecting piece 21 is provided with a coil spring mounting piece 82 in which a locking hole 83 for locking the locking portion 74 of the torsion coil spring 70 is formed. The coil spring mounting piece 82 is formed with a substantially circular locking hole 83 that extends toward the shutter portion 16 side and is partially opened.

The torsion coil spring 70 is locked in the locking hole 83 by inserting a rising portion 74b of the locking portion 74 formed in the first arm portion 70a from the open end. Here, as described above, the bent portion 74c of the locking portion 74, since the bent from the extending direction of the first arm portion 70a having a predetermined angle theta _1, the shutter member 80 is opened and closed Even when this is done, the locking portion 74 is prevented from coming off from the locking hole 83.

21A and 21B, the locking portion 74 of the torsion coil spring 70 has a predetermined angle θ from the extending direction of the first arm portion 70a. By forming it to be bent with ₂ and θ ₃ , it is possible to further prevent the locking hole 83 from coming off.

  Further, as shown in FIGS. 19 and 21, the second arm portion 70 b of the torsion coil spring 70 is formed with a second coil portion 72 that rotatably engages the torsion coil spring 70 with the cartridge body 5. . The second coil portion 72 is formed toward the one end side 71a in the thickness direction of the first coil portion 71 by being wound a plurality of times with the winding direction opposite to that of the first coil portion 71. Has been. The second coil portion 72 is rotatably attached to a support pin 42 protruding from the inner surface of the cartridge body 5.

  In this way, the torsion coil spring 70 is formed by winding the first coil portion 71 and the second coil portion 72 a plurality of times with the winding directions opposite to each other. This makes it possible to reduce the thickness of the cartridge body. That is, in the torsion coil spring having a plurality of coil portions, when the winding direction of each coil portion is formed in the same direction, the second coil portion 72 is further moved from the position of the other end side 71b of the first coil portion to the first coil. Since the coil is wound toward the other end side 71b in the thickness direction of the portion 71, the thickness of the entire coil is increased by adding the thickness of the second coil portion to the thickness of the first coil portion. As a result, the thickness of the cartridge body that houses the torsion coil spring increases. In addition, the thickness of the disk drive device into which such a disk cartridge is inserted and removed increases.

  However, according to the torsion coil spring 70 according to the present invention, the first coil portion 71 and the second coil portion 72 are wound in the opposite directions, so that the second coil portion 72 is the first coil. Winding toward one end side 71a of the portion 71, the thickness of the entire spring can be suppressed to the thickness of either the first or second coil portion 71, 72.

  In the torsion coil spring 70 as described above, similarly to the torsion coil spring 39, when the shutter member 80 is in a position to close the head opening 13, the state in which the head opening 13 is closed is maintained. 2 urges the shutter member 80 in the direction of arrow B. When the disk cartridge 1 is mounted on the drive device and the lock by the shutter member locking mechanism 27 is released, the shutter member 80 relatively moves in the direction of arrow A in FIG. Along with the movement of the shutter member 80, the torsion coil spring 70 locked in the locking hole 83 provided in the coil spring mounting piece 82 of the shutter member 80 is freely rotatable on the support pin 42 protruding from the inner surface of the cartridge body 5. The second coil part 72 is rotated around the attached second coil part 72, and the position of the first coil part 71 moves in the moving direction of the shutter member 80. When the first coil portion 71 exceeds the position of the support pin 42, the urging direction of the torsion coil spring 70 is reversed, and the shutter member 80 is urged in the direction of arrow A in FIG. The head opening 13 is held in the open position.

  Further, when an ejection operation is performed to take out the disk cartridge 1 held in a position where the shutter member 80 opens the head opening 13 from the disk drive device, the shutter member 80 moves in the direction of arrow B in FIG. The first coil portion 71 moves in the direction of arrow B in the same direction. When the shutter member 80 further moves in the direction of the arrow B and the coil portion 71 exceeds the position of the support pin 42 located on the moving direction side of the shutter member 71, the biasing direction of the torsion coil spring 70 is reversed. When the urging direction is reversed, the torsion coil spring 70 urges the shutter member 80 to move in the direction of arrow B in FIG. 2 and moves in the direction to close the head opening 13 to move the head opening. 13 is held in the closed position.

  Further, as shown in FIG. 22, the disk cartridge according to the present invention is formed such that the second coil portion 72 of the torsion coil spring 70 is gradually reduced in diameter toward the tip in the thickness direction. The support pin 42 erected on the cartridge main body 5 with which the coil portion 72 engages may also be formed so that the diameter gradually decreases toward the tip in the erection direction.

  That is, the second coil portion 72 of the torsion coil spring 70 is wound so that the diameter D1 on the proximal end side in the winding direction is wider than the diameter D2 on the distal end side in the winding direction and gradually decreases in diameter toward the distal end. Is done. Further, the support pin 42 of the cartridge body 5 with which the second coil portion 72 engages has a diameter D3 on the proximal end side in the standing direction larger than a diameter D4 on the distal end side in the standing direction, and as it goes toward the distal end. It is formed so as to gradually reduce the diameter. Further, the diameters D1 and D3 on the base end sides of the second coil portion 72 and the support pin 42 are formed substantially the same, and the diameters D2 and D4 on the tip ends are formed substantially the same. The support pin 42 is formed to be higher than the thickness h of the second coil portion 72, and has a diameter substantially the same as the diameter D2 of the distal end portion of the second coil portion 72 at a height h from the base end portion. D4.

  According to such a disk cartridge 1, the second coil portion 72 is engaged with the support pin 42, whereby a gap is formed in the support pin 42 from the proximal end to the distal end in the winding direction of the second coil portion 72. Therefore, when the torsion coil spring 70 is rotated in accordance with the opening / closing operation of the shutter member 80, it is possible to prevent the second coil portion 72 serving as a rotation fulcrum from rattling. Further, since the torsion coil spring 70 is securely engaged with the cartridge main body 5, it is possible to prevent the torsion coil spring 70 from dropping from the cartridge main body 5 during use of the disk cartridge 1.

  In the disk cartridge 1 described above, the two-way urging mechanism 38 that selectively urges the shutter member 15 to the position for opening and closing the head opening 13 is configured by using the torsion coil spring 39. However, the disk cartridge according to the present invention. 1 is not limited to this example, and may be configured as follows.

  Hereinafter, another example of the disk cartridge 1 according to the present invention will be described with reference to the drawings.

  The disk cartridge 1 shown below is configured without providing a shutter member locking mechanism 27 for locking the shutter member 15 in the closed position.

  In the disk cartridge 1 of this example, a two-way urging mechanism 138 that selectively urges the shutter member 15 to a position for opening and closing the head opening 13 is configured as shown in FIG. The two-way urging mechanism 138 is also disposed on the upstream side in the arrow A direction from the position where the shutter member 15 closes the head opening 13 to the position where the shutter member 15 opens.

  The bi-directional urging mechanism 138 shown in FIG. 23 includes a rotation lever 102 as a rotation member supported rotatably on the inner surface of the lower half 4 constituting the cartridge body 5 via a support shaft 101, and this rotation. And a compression coil spring 103 which is an urging member that urges the moving lever 102 to rotate.

  The rotating lever 102 extends along the moving direction of the shutter member 15, the base portion side supported by the support shaft 101 is positioned downstream in the moving direction of the shutter member 15, and the free end side is the shutter member. 15 is arranged so as to be located upstream in the moving direction. The rotating lever 102 is centered on the support shaft 101 by an arrow E in FIG. 23 by a compression coil spring 103 interposed between a spring support portion 104 provided in the cartridge main body 5 and an end portion on the free end side. It is biased to rotate in the direction. That is, the rotation lever 102 is urged to rotate toward the one side surface 8 of the cartridge body 5 on which the shutter member 15 slides at the free end side.

  The rotation biasing position of the rotation lever 102 is regulated by the end portion on the free end side coming into contact with the rising peripheral walls 3 a and 4 a of the cartridge body 5.

  On one side of the rotating lever 102, that is, on the surface facing the support portion 17 of the shutter member 15 supported by the cartridge body 5, a pressing operation that is pressed by a pressing operation portion 105 provided on the shutter member 15 A surface 106 is provided. The pressing operation surface 106 includes a first inclined surface 107 that is inclined toward the proximal end with the central portion in the longitudinal direction of the rotating lever 102 as an apex 106a, and a second inclined surface 108 that is inclined toward the free end. It consists of and.

  The pressing operation unit 105 provided in the shutter member 15 cuts and raises a part of the connecting piece 21 and is cylindrical at the distal end of the extension piece 109 formed so as to protrude upstream in the moving direction of the shutter member 15. It is constructed by planting pins. The pressing operation unit 105 is provided on the shutter member 15 so as to come into contact with the pressing operation surface 106 of the rotating lever 102 attached to the cartridge body 5 side when the shutter member 15 is supported by the cartridge body 5. .

  Then, the first inclined surface 107 constituting the pressing operation surface 106 guides the pressing operation portion 105 riding on the first inclined surface 107 so as to move to the proximal end side of the rotation lever 102, and the shutter. The member 15 is guided to move in the direction of closing the head opening 13. Further, the second inclined surface 108 guides the pressing operation portion 105 riding on the second inclined surface 108 so as to move to the free end side of the rotating lever 102, and the shutter member 15 is provided with the head opening 13. Guide to move in the direction of opening.

  The two-way urging mechanism 138 shown in FIG. 23 is urged to rotate in the direction of arrow E so that the rotation lever 102 is pressed against the pressing operation unit 105 provided on the shutter member 15 by the compression coil spring 103. The head opening in the direction of arrow B in FIG. 23 in the direction of closing the shutter member 15 depending on whether the operation unit 105 is positioned on the first inclined surface 107 or the second inclined surface 108. 13 is guided so as to move in the direction of closing 13 or in the direction of opening the head opening 13 in the direction of arrow A in FIG. At this time, the rotation lever 102 is urged to rotate in the direction of arrow E in FIG. 23 in the direction in which the compression operating portion 105 of the shutter member 15 is pressed and urged by the compression coil spring 103. Is biased so as to be parallel to the rotation. As a result, the pressing operation unit 105 located on the first inclined surface 107 or the second inclined surface 108 is pressed by the first inclined surface 107 or the second inclined surface 108 and closes the head opening 13. 23 is moved in the direction of arrow B in FIG. 23 or in the direction of opening the head opening 13 in the direction of arrow A in FIG. When the pressing operation unit 105 is guided by the first inclined surface 107 or the second inclined surface 108 and moved, the shutter member 15 is moved to a position where the head opening 13 is closed or opened. Then, as shown in FIG. 23, when the shutter member 15 is moved to a position where the head opening 13 is closed, the first inclined surface of the turning lever 102 to which the pressing operation portion 105 is urged to turn. By being pressed and supported by 107, the state of being always urged in the direction of arrow B in FIG. 23 is maintained, and the state in which the head opening 13 is closed is maintained.

  Therefore, also in the disk cartridge 1 of this example, the head opening 13 can be reliably closed.

  Further, when the shutter member 15 is moved to a position where the head opening 13 is opened, the pressing operation unit 105 is pressed and supported by the second inclined surface 108 of the rotating lever 102, whereby the arrow in FIG. Since the state of being constantly urged in the A direction is maintained and the state where the head opening 13 is opened is maintained, even in the disk recording and / or reproducing apparatus using the disk cartridge 1, the shutter member 15 is provided on the apparatus side. It is not necessary to provide a mechanism for holding in the open position, the mechanism can be simplified, and the apparatus itself can be downsized.

  Here, a state where the disk cartridge 1 of this example is inserted into and removed from the disk drive device 50 described above and the head opening 13 is opened and closed will be described.

  In the initial state in which the disk cartridge 1 of this example is not mounted in the disk drive device 50, the shutter member 15 is pressed and supported by the first inclined surface 107 of the rotating lever 102 to which the pressing operation unit 105 is urged to rotate. 23, the head opening 13 is held at a position where the head opening 13 is normally urged in the direction of arrow B in FIG.

  When the disc cartridge 1 is inserted into the cartridge holder 54 of the disc drive device 50 with the arcuate portion 7 side as the insertion end, the shutter member 15 is moved to the arrow shown in FIG. Move in direction A. When the shutter member 15 is moved in the direction of arrow A in FIG. 23, the pressing lever 105 moves against the urging force of the compression coil spring 103 while the pressing operation unit 105 moves on the first inclined surface 107 in FIG. It is rotated in the direction of arrow F. When the disc cartridge 1 is further inserted into the cartridge holder 54 and the pressing operation unit 105 passes over the apex 106 a of the rotation operation unit 106 and reaches the second inclined surface 108, the rotation lever 102 is attached to the compression coil spring 103. In response to the force, the rotation returns in the direction of arrow E in FIG. That is, the rotation lever 102 rotates so as to return the second inclined surface 108 inclined in the direction opposite to the first inclined surface 107 to the initial state. As a result, the pressing operation unit 105 on the second inclined surface 108 is guided by the second inclined surface 108 and moves in the direction of arrow A in FIG. 25, and the shutter member 15 is a position where the head opening 13 is opened. Moved to. At this time, the shutter member 15 is constantly urged in the direction of arrow A in FIG. 25 by being pressed and supported by the second inclined surface 108 of the rotation lever 102 to which the pressing operation unit 105 is urged to rotate. The state is maintained, and the state where the head opening 13 is opened is maintained.

  Further, when the disk cartridge 1 mounted in the disk drive device 50 is ejected, the pressing operation unit 105 moves from the second inclined surface 108 of the rotating lever 102 to the first inclined surface 107. When the pressing operation portion 105 passes over the apex 106a of the pressing operation surface 106 and reaches the first inclined surface 107, the rotating lever 102 receives the urging force of the compression coil spring 103 and returns to the direction of arrow E in FIG. The pressing operation unit 105 on the first inclined surface 107 is moved in the direction of arrow B in FIG. 23, and the shutter member 15 is moved to a position where the head opening 13 is closed. As a result, when the disk cartridge 1 is ejected from the disk drive device 50, the shutter member 15 is returned to the initial position. When the shutter member 15 is returned to the initial position, the pressing operation unit 105 is pressed and supported by the first inclined surface 107 of the rotating lever 102 to which the pressing operation unit 105 is urged to rotate, so that the arrow B in FIG. The state always biased in the direction is maintained, and the state in which the head opening 13 is closed is maintained.

  Also in this disk cartridge 1, the shutter member 15 can be securely held at the position where the head opening 13 is opened and closed, and the head opening 13 is opened and closed according to the position of the shutter member 15 relative to the head opening 13. Since it can be moved and urged in the direction, the opening / closing operation of the head opening 13 can be reliably performed. Also in the disk drive device 50 using the disk cartridge 1 of this example, there is no need to provide a mechanism for holding the shutter member 15 in the open position.

  In the disk cartridge 1 described above, the two-way urging mechanism 138 includes the rotating lever 102 and the compression coil spring 103 that urges the rotating lever 102. However, these are integrally configured. Also good. That is, as shown in FIG. 26, the two-way urging mechanism 238 includes a rotation lever 202 and a rotation urging portion 203 that urges the rotation lever 202 toward the shutter member 15 by a leaf spring. It is formed integrally. The rotation lever 202 is formed by bending a long leaf spring into a mountain shape, and a first inclined surface 207 and a second inclined surface 208 on the pressing operation surface 206 for pressing the pressing operation unit 105 on the shutter member 15 side. Is formed. The rotation urging portion 203 is formed by bending the tip side portion extended from the portion constituting the rotation lever 202 of the leaf spring into a semicircular shape.

  The rotation lever 202 integrally formed with the rotation urging portion 203 is disposed in the cartridge main body 5 so that the pressing operation surface 206 is along the moving direction of the shutter member 15, and the base end side is disposed on the cartridge main body. It is pivotally supported by a support shaft 101 provided on the 5 side, and the tip end side of the rotation urging portion 203 is supported and attached to a spring support portion 104 provided on the cartridge body 5 side. The rotation lever 202 configured as described above also receives the urging force of the rotation urging unit 203 and presses the pressing operation surface 206 toward the pressing operation unit 105 side of the shutter member 15 with the support shaft 101 as a center. In FIG. 26, the rotation is biased in the direction of arrow E.

  Also in the disk cartridge 1 provided with the two-way urging mechanism 238 configured as shown in FIG. 26, detailed description is omitted, but as with the disk cartridge 1 using the two-way urging mechanism 138 described above, The shutter member 15 is opened / closed in connection with the insertion / removal of the disk drive device 50, and the shutter member 15 can be held at each position where the head opening 13 is opened / closed.

  In each of the disk cartridges 1 described above, the shutter member 15 is urged to move in any position direction that opens or closes the head opening 13 according to the movement position with respect to the head opening 13. A bi-directional biasing mechanism 338 configured to hold the shutter member 15 at each of the position where the head opening 13 is closed and the position where the head opening 13 is opened may be used.

  As shown in FIG. 27, the two-way urging mechanism 338 includes a pressing operation plate 302 formed by a leaf spring. The pressing operation plate 302 is disposed so as to extend along the moving direction of the shutter member 15 while being supported at the center in the longitudinal direction by the mounting plate 301 mounted in the cartridge body 5. The pressing operation plate 302 is formed so that the first and second pressing operation pieces 303 and 304 projecting on both sides of the mounting plate 301 are orthogonal to the moving direction of the shutter member 15 with a support point on the mounting plate 301 as a center. Elastically displaced.

  The two-way urging mechanism 338 is also disposed on the upstream side in the direction in which the shutter member 15 moves to open the head opening 13.

  The pressing operation plate 302 is formed with a length corresponding to a range in which the shutter member 15 moves between a position where the shutter opening 15 is closed and an opening / closing position. It is attached to the mounting plate 301 so as to press and urge the pressing operation portion 105 provided on the shutter member 15 that is in sliding contact.

  Further, the front end side of the first and second pressing operation pieces 303 and 304 constituting the pressing operation plate 302 is engaged with the pressing operation unit 105 when the shutter member 15 is moved to a position where the head opening 13 is opened and closed. In addition, first and second engaging protrusions 305 and 306 for restricting the movement of the shutter member 15 are provided, respectively.

  As shown in FIG. 28, the disk cartridge 1 having the two-way urging mechanism 338 configured as described above has the pressing operation unit 105 when the shutter member 15 is in the position where the head opening 13 is closed. The first engagement protrusion 305 is overcome and the first pressing operation piece 303 is positioned on the distal end side to engage with the first engagement protrusion 305, and the shutter member 15 closes the head opening 13. Held in position. At this time, the shutter member 15 is held at a position where movement of the pressing member 105 is restricted and the head opening 13 is closed because the pressing member 105 is pressed and supported by the first pressing member 303.

  Further, when the shutter member 15 is in a position where the head opening 13 is opened, as shown in FIG. 29, the pressing operation unit 105 gets over the second engaging protrusion 306 and the second pressing operation piece 304 is moved. The shutter member 15 is held at a position where the head opening 13 is opened by engaging with the second engaging protrusion 306 located on the distal end side. At this time, the shutter member 15 is held at a position where the movement of the pressing member 105 is restricted and the head opening 13 is opened because the pressing member 105 is pressed and supported by the second pressing member 304.

  Also in the disk cartridge 1 having the two-way urging mechanism 338 configured as described above, the shutter member 15 is opened and closed in association with the insertion into and removal from the disk drive device 50, and the head opening 13 is opened and closed. The shutter member 15 can be held at each position. In addition, it is not necessary to provide a mechanism for holding the shutter member 15 in the open position on the side of the disk drive device 50 using the disk cartridge 1.

  In the above description, an example in which the insertion end side is formed in a semicircular shape and applied to a disk cartridge that has been reduced in size has been described. However, the present invention is not limited to the disk cartridge described above, and the cartridge The main body is formed in a rectangular shape, and further applied to a disk cartridge provided with recording and / or reproducing openings on both upper and lower surfaces of the cartridge main body, and the same advantages as the above-described disk cartridge can be obtained. it can.

  That is, the present invention can be widely applied to a disk cartridge provided with a shutter member that opens and closes a recording and / or reproducing opening provided in the cartridge body.

It is the perspective view which looked at the disc cartridge concerning the present invention from the upper half side. It is the perspective view which looked at the disc cartridge concerning the present invention from the lower half side. FIG. 3 is a plan view seen from the lower half side of the disc cartridge according to the present invention. FIG. 6 is a perspective view showing a shutter member and a cartridge body on which the shutter member is supported. It is a perspective view which shows a shutter member and the shutter member locking mechanism attached to this shutter member. FIG. 3 is a side view showing a side surface of the disc cartridge according to the present invention on a side where a shutter member is attached. It is sectional drawing which shows the state which attached the shutter member to the cartridge main body. It is a top view which shows the state in which the shutter member was locked by the shutter member locking mechanism. It is a top view which shows the state by which the lock | rock of the shutter member was cancelled | released. It is a top view which shows the state in the middle of moving the shutter member in the direction which opens the opening part for heads. It is a top view which shows the state which the shutter member was moved to the position which opened the opening part for heads. FIG. 4 is a side view of the disk cartridge showing a state in which a head opening is opened. 1 is a perspective view showing an example of a disk drive device in which a disk cartridge according to the present invention is used. FIG. 5 is a plan view showing a state in which the disk cartridge is inserted with an inclination with respect to the cartridge insertion / removal port of the disk drive device. It is a top view which shows the state in which a disk cartridge inclines in another direction with respect to the cartridge insertion / extraction opening | mouth of a disk drive apparatus. FIG. 4 is a plan view showing a state in which the disc cartridge is inserted into the cartridge holder with the attitude controlled. FIG. 5 is a plan view showing a state in which the disk cartridge is inserted into the cartridge holder and the shutter member is unlocked. FIG. 6 is a plan view showing a state in which the disk cartridge is inserted into the cartridge holder, the shutter member is moved, and the head opening is opened. It is a figure which shows the other example of the torsion coil spring which comprises a two-way biasing mechanism. It is a top view which shows the other example of a shutter member. It is a figure which shows the further another example of the torsion coil spring which comprises a two-way biasing mechanism. It is a figure which shows the further another example of the torsion coil spring which comprises a two-way biasing mechanism. It is a perspective view which shows the other example of the disc cartridge which concerns on this invention. FIG. 24 is a plan view showing a state in which the shutter member is moved halfway to open the head opening in the disk cartridge shown in FIG. 23. FIG. 24 is a plan view showing a state in which the shutter member is moved to a position where the head opening is opened in the disk cartridge shown in FIG. 23. FIG. 10 is a perspective view showing still another example of the disk cartridge according to the present invention. FIG. 10 is a perspective view showing still another example of the disk cartridge according to the present invention. FIG. 28 is a plan view showing a state in which the shutter member is moved halfway to open the head opening in the disk cartridge shown in FIG. 27. FIG. 28 is a plan view showing a state where the shutter member is moved to a position where the head opening is opened in the disk cartridge shown in FIG. 27.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc cartridge, 2 Optical disc, 5 Cartridge main body, 7 Arc-shaped part, 8 Side surface by which shutter member is supported, 13 Head opening part, 15 Shutter member, 17 Support part, 18 Slide guide part, 38 With 2 directions Force mechanism, 39, 70 torsion coil spring

Claims (11)

A disc-shaped recording medium;
A cartridge main body provided with a recording and / or reproducing opening for accommodating the disk-shaped recording medium in a rotatable manner and allowing a part of the disk-shaped recording medium to face outward over the inner and outer circumferences;
A shutter member that is movably supported by the cartridge body and opens and closes the recording and / or reproducing opening;
A bi-directional biasing mechanism that selectively biases the shutter member to either the position where the recording and / or reproducing opening is closed and the position where the recording and / or reproducing opening is opened. Disc cartridge.   The bi-directional biasing mechanism is configured to close the shutter member in the recording and / or reproducing opening or the recording and / or reproducing according to the position of the shutter member with respect to the recording and / or reproducing opening. 2. The disc cartridge according to claim 1, wherein the disc cartridge is selectively biased in any one of the directions in which the reproduction opening is opened.   2. The disc cartridge according to claim 1, wherein the two-way urging mechanism is provided on the upstream side in the moving direction in which the shutter member opens the recording and / or reproducing opening.   2. The disk cartridge according to claim 1, wherein the two-way biasing mechanism is constituted by a torsion coil spring connected between the shutter member and the cartridge body.   The torsion coil spring is provided with a first coil portion at an intermediate portion and a pair of arm portions extending from the first coil portion, and a winding direction of the first coil portion and the winding direction at one end of one arm portion. A second coil portion wound in reverse is provided, and the second coil portion is rotatably supported by a part of the cartridge body, and the other arm portion is supported by the shutter member. 5. The disk cartridge according to claim 4, wherein the shutter member is urged in either a direction for closing the recording and / or reproducing opening or a direction for opening the recording and / or reproducing opening.   The torsion coil spring is bent in a substantially U shape at the tip of the other arm portion, and is extended from the other arm portion and / or a bent portion that is bent in parallel with the extension portion. 6. The disk cartridge according to claim 5, wherein a locking portion having a predetermined angle with an extending direction of the other arm portion is formed, and the locking portion is locked to the shutter member.   The bi-directional biasing mechanism is rotatably supported by the cartridge body, and the shutter member opens and closes the recording and / or reproducing opening by a pressing operation unit provided on the shutter member. A rotating member that is pressed and rotated when moving, and an urging member that urges the rotating member to rotate toward the pressing operation unit, and the rotating member includes the shutter member. Depending on the position of the recording and / or reproducing opening relative to the recording and / or reproducing opening, the first inclined surface guides the shutter member in a direction to close the recording and / or reproducing opening; 2. The disk cartridge according to claim 1, further comprising a second inclined surface that guides the reproducing opening in the opening direction.   8. The disk cartridge according to claim 7, wherein the rotating member and the biasing member are integrally formed by a leaf spring.   When the shutter member is moved to a position where the recording and / or reproduction opening is closed, the two-way urging mechanism engages with a pressing operation portion provided on the shutter member to cause the shutter member to When the shutter member is moved to a position where the recording and / or reproducing opening is opened, the first engaging protrusion held in the closed position is engaged with the pressing operation portion provided on the shutter member. 2. The disk cartridge according to claim 1, further comprising a leaf spring provided with a second engagement protrusion for holding the shutter member in the open position.   An insertion end side of the cartridge main body into the recording and / or reproducing apparatus is a substantially semicircular arc-shaped portion centering on the center of the disk-shaped recording medium accommodated in the cartridge main body, and is used for the recording and / or reproducing. 2. The disk cartridge according to claim 1, wherein the opening is formed so as to face a side surface other than the side surface of the cartridge body that is the arcuate portion. 12. The disk cartridge according to claim 11, wherein the side surface on which the shutter member moves is a surface parallel to the moving direction of the shutter member.

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