JPH0621098Y2 - Shutter open / close mechanism for disk cartridges - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a shutter opening / closing mechanism of a disk cartridge for opening / closing a shutter.

[Summary of the Invention] According to the present invention, a disk drive is constructed by slidably attaching a shutter to a case to form a disk cartridge, providing a cartridge insertion chamber in a cartridge holder, and rotatably providing a shutter arm having a release pin on the tip side. A disk cartridge that constitutes a device and in which a shutter arm rotates and a shutter slides from a closed position to an open position in a state where the release pin enters the pin insertion groove in an insertion process of inserting the disk cartridge into the cartridge insertion chamber. In the shutter opening / closing mechanism, a guide groove is provided on the case side for moving the release pin that has entered the pin insertion groove, and the release pin is configured so that the release pin can enter and exit only at the shutter closed position. Disc cartridge mounting process and ejection. Release pin is of opening and closing of the shutter is reliably performed without being withdrawn from the pin insertion groove at a position other than the shutter closed position in the process.

[Prior Art] The disc cartridge, which rotatably accommodates the disc in the case, prevents dust from entering the case through the head insertion hole or touching the disc with a finger when the disc is not mounted. A shutter is provided. This shutter is placed in the open position during the mounting process of the disc cartridge, and the shutter in the opened position is placed in the closed position during the ejection process of the disc cartridge.
The figure shows a conventional shutter opening / closing mechanism.

In FIG. 6, the case 2 of the disk cartridge 1 has an eccentric shape, and the disk 5 is rotatably accommodated in the case 2. A head insertion hole 7 is formed on the upper and lower surfaces of the case 2 at an opposing position, and the head insertion hole 7 is opened and closed by a shutter 9. Further, the pin sliding surface 4 is provided on the insertion front end side of the case 2 at a position where the shutter 9 slides.
4 is formed, and a release pin 41 described below slides on the pin sliding surface 44. The shutter 9 includes an upper surface portion 10 and a lower surface portion 11.
And a front face portion 12 connecting them to each other are formed in a substantially U shape, and are attached to the case 2 so as to sandwich the case 2. The shutter 9 is slidable between a closed position for closing the head insertion hole 7 and an open position for opening it. Further, a pin insertion groove 13 is formed on the front end side of the shutter 9 by partially cutting the upper surface portion 10, the lower surface portion 11 and the front surface portion 12. The surface in which the pin insertion groove 13 is formed has a shutter opening direction surface 14 and a shutter closing direction surface 1.
5 is formed, and a release pin 41 described below presses these surfaces to slide the shutter 9. A lock claw 17 is provided near the pin insertion groove 13 by bending a part of the front face portion 12, and a lock member 19 is locked to the lock claw 17. One end of the lock member 19 is the case 2
The other end of the pin insertion groove 13 is supported by the pin insertion groove 13 and is movable inwardly of the pin insertion groove 13 by elastic deformation. A lock groove 27 is formed in the lock member 19, and the lock claw 1 is formed in the lock groove 27.
7 is in.

The disk drive device 30 is provided with a cartridge holder 31 which can be raised and lowered with respect to a main body case (not shown), and the cartridge holder 31 is provided with a cartridge insertion chamber 35. A shutter arm 38 is arranged on the upper surface of the cartridge holder 31, and the base end of the shutter arm 38 is rotatably supported. A cylindrical release pin 41 is vertically provided at the tip of the shutter arm 38, and the release pin 41 is provided in the cartridge insertion chamber 3
5 is protruding. The shutter arm 38 rotates between a shutter closed position and a shutter open position, and a coil spring 40 is interposed between the shutter arm 38 and the cartridge holder 31. The spring force of the coil spring 40 causes the shutter 9 to move to the shutter closed position. Biased to the side.

When the disc cartridge 1 is inserted into the cartridge insertion chamber 35, the release pin 41 enters the pin insertion groove 13 of the shutter 9 as shown by the solid line in FIG.
With this release pin 41, the lock member 19 is inserted into the pin insertion groove 13
The lock claw 17 is elastically deformed inward and the lock claw 17 comes out of the lock groove 27 to release the shutter lock. Further, when the disc cartridge 1 is inserted, the shutter arm 38 rotates in the direction of arrow d in FIG. 7 against the spring force of the coil spring 40. With the rotation of the shutter arm 38, the release pin 4
When 1 pushes the shutter 9 and slides on the pin sliding surface 44 so that the shutter 9 slides toward the open position and the disc cartridge 1 is inserted to the insertion completion position, it is indicated by a chain double-dashed line in FIG. Thus, the shutter arm 38 is located at the shutter open position, the shutter 9 is located at the open position, and the head insertion hole 7 is opened. At the same time when the disc cartridge 1 is inserted to the insertion completion position, the cartridge holder 31 is lowered by the holder elevating means (not shown). In this descending process, the head is inserted into the head insertion hole 7, and the turntable is chucked on the hub portion of the disk 5 to enable recording and reproduction, and the mounting process is completed, and the disk cartridge 1 is positioned at the cartridge mounting position. To be done.

When the eject mode is selected when the disc cartridge 1 is located at the mounting position, the cartridge holder 31 is first raised to retract the head from the head insertion hole 7 and the chucking of the turntable is released, contrary to the above operation. It Next, the shutter arm 38 is rotated in the direction of arrow e in FIG. 7 by the spring force of the coil spring 40, the disk cartridge 1 is pushed in the direction opposite to the cartridge insertion direction and pulled out, and the shutter 9 slides in the closed position direction. . When the shutter arm 38 is located at the shutter closed position, the shutter 9 slides to the closed position to close the head insertion hole 7 and the lock claw 17 of the shutter 9 enters the lock groove 27 of the lock member 19 to be in the locked state and the discharging process. Is completed.

[Problems to be Solved by the Invention] However, in the shutter opening / closing mechanism described above,
As shown in FIG. 8, since the release pin 41 is simply inserted into the pin insertion groove 13 of the shutter 9 by the spring force of the coil spring 40, only the release pin 41 moves toward the shutter opening direction and the pin insertion groove. There is a possibility of getting out of 13.
When the release pin 41 comes out of the pin insertion groove 13, the shutter 9 cannot be opened and closed properly. Specifically, in the above-described disc cartridge without the shutter spring, the shutter 9 is directly placed at the position where the release pin 41 is pulled out.
Is located, there are drawbacks such as damage to the head and pulling out from the cartridge insertion chamber 35 in a state where the shutter 9 is not located at the closed position. In the case of a disk cartridge with a shutter spring, the release pin 41
Since the shutter 9 returns to the closed position when is removed, there is a drawback that the head is damaged.

Therefore, an object of the present invention is to provide a shutter opening / closing mechanism for a disk cartridge in which the release pin does not slip out of the pin insertion groove of the shutter at a position other than the shutter closed position.

[Means for Solving the Problems] In the shutter opening / closing mechanism of a disk cartridge according to the present invention for solving the above-mentioned object, a shutter is attached to a case having a head insertion hole, and the shutter is closed to close the head insertion hole. The shutter is configured to be slidable between a position and an open position where the head insertion hole is opened, and a shutter arm is attached to a disk cartridge having a pin insertion groove in the shutter and a cartridge holder having a cartridge insertion chamber. A release pin is provided on the tip side of the arm and the shutter arm is set to the shutter closed position,
A disc drive device provided rotatably between shutter open positions and urging means for urging the shutter toward the shutter closed position, and is in the process of inserting the disc cartridge into the cartridge insertion chamber. With this insertion stroke, the release pin enters the pin insertion groove, and in this inserted state, the shutter arm rotates from the shutter closed position to the shutter open position against the biasing force of the biasing means. In the shutter opening / closing mechanism of the disk cartridge in which the shutter slides from the closed position to the open position following the rotation of the guide slot, a guide groove is provided on the case side for moving the release pin inserted in the pin insertion groove. The release pin can enter and exit the groove only near the shutter closed position, and can be removed at other positions. One in which was constructed so as not to you.

[Operation] In the insertion process during the mounting process, the release pin first enters the pin insertion groove of the shutter and also enters the guide groove. When the disk cartridge is further inserted from this position, the shutter arm rotates in the shutter opening direction side against the urging force of the urging means, and the release pin moves the guide groove while pressing the shutter to open the shutter. In the pulling-out process during the discharging process, contrary to the above-mentioned operation, the shutter arm is rotated to the shutter close position side by the biasing force of the biasing means according to the pulling-out of the disk cartridge, and the release pin moves in the guide groove while pushing the shutter. To do. When the shutter arm returns to the shutter closed position, the shutter is positioned at the closed position, and when the disc cartridge is further pulled out, the release pin is pulled out from the pin insertion groove and the guide groove, and the disc cartridge can be pulled out from the cartridge insertion chamber. Even if the release pin tries to come out of the pin insertion groove due to external force acting on the release pin at a position other than the shutter closed position in the mounting process and the ejection process, the release pin cannot be removed from the guide groove. Does not come out of the pin insertion groove.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of the shutter opening / closing mechanism of the present invention.

1 to 4, the outside of the disk cartridge 1 is covered with a case 2 having a substantially square shape. The case 2 is composed of an upper case member 3 and a lower case member 4 joined together at their peripheral edge surfaces, and a disk 5 is rotatably accommodated in the case 2. A turntable insertion hole 6 is formed substantially in the center of the lower case member 4, and the turntable of the disk drive device is inserted through the turntable insertion hole 6. A head insertion hole 7 is formed at a position where the upper case member 3 and the lower case member 4 face each other, and the head of the disk drive device is inserted into the case 2 through the head insertion hole 7. Further, on the outer surfaces of the upper case member 3 and the lower case member 4, a shutter slide surface 8 is formed at a position including the head insertion hole 7 and the turntable insertion hole 6 and is recessed further inward than other portions. The shutter 9 slides on the shutter slide surface 8.

The shutter 9 is composed of an upper surface portion 10, a lower surface portion 11 and a front surface portion 12 connecting them, and has a substantially U shape, and is attached to the case 2 so as to sandwich the case 2. The lower surface portion 11 is provided with a guide claw 45 also serving as a lock, and the guide claw 45 is a guide groove (not shown) of the lower case member 4.
Has been inserted into. The shutter 9 is slidable between a closed position for closing the head insertion hole 7 and the turntable insertion hole 6 and an open position for opening them. or,
A pin insertion groove 13 is formed on the front end side of the shutter 9 by cutting out a part of the upper surface portion 10 and the front surface portion 12, and the pin insertion groove 13 is formed deeper than the conventional one. A shutter opening direction surface 14 and a shutter closing direction surface 15 are formed on a surface of the upper surface portion 10 where the pin insertion groove 13 is formed, and a release pin 41 described below presses these surfaces to slide the shutter 9. A hole 16 connecting to the pin insertion groove 13 is formed in the front surface portion 12, and a lock claw 17 is provided by utilizing the formation of the hole 16.

The lock member 19 is formed of an elastic body, and includes a support portion 20, a substantially U-shaped guide portion 21, and a pressed portion 22 extending to one end side of the guide portion 21. Two circular holes 23 are formed in the supporting portion 20, and the pin portions 26 of the lower case member 4 are inserted into the circular holes 23, respectively. The guide portion 21 is composed of a pin sliding portion 24 and a pin slip-out preventing portion 25, and a guide groove 28 is formed surrounded by these.
The inlet 28a of the guide groove 28 is located near the pin insertion groove 13 of the shutter 9 in the closed position. An elongated hole 29 having the same shape as the guide groove 28 and slightly wider than the guide groove 28 is formed at a position of the upper case member 3 opposite to the guide groove 28. A notch portion 43 is formed on the tip end side of the pin removal preventing portion 25 so that the lock claw 17 of the shutter 9 can move. A part of the pressed portion 22 is arranged in the pin insertion groove 13 of the shutter 9 and a lock groove 27 is formed in the pressed portion 22, and the lock claw 1 of the shutter 9 is formed in the lock groove 27.
7 is in. Thus, the lock member 19 is the second
As shown by the solid line in the figure, the lock position in which the lock claw 17 of the shutter 9 enters the lock groove 27 to lock the shutter 9, and as shown by the chain double-dashed line in FIG. The lock claw 17 of the shutter 9 comes out of the position 27 and moves to and from the unlock position where the shutter 9 is unlocked.

In FIG. 5, a cartridge holder 31 of the disk drive device 30 is shown.
Is provided in a body case (not shown) so as to be able to move up and down.
The cartridge holder 31 includes a top plate portion 32, both side plate portions 33, and a bottom plate portion 34 formed by bending a single plate, and a cartridge insertion chamber 35 is surrounded by these. The insertion port of the cartridge insertion chamber 35 is provided at a position corresponding to the cartridge insertion port of the front panel (not shown), and the disc cartridge 1 is inserted into the cartridge insertion chamber 35 from this cartridge insertion port. Bottom plate part 3
4 is provided with a stopper 36, and the stopper 3
Reference numeral 6 regulates the insertion so that the disc cartridge 1 is not inserted beyond the cartridge insertion completion position. A cutout portion 37 is formed in the top plate portion 32, and a pin guide surface 37a is formed in a part of the cutout portion 37. The pin guide surface 37a has an arc shape, and the release pin 41 of the shutter arm 38 moves along the pin guide surface 37a.

The shutter arm 38 is arranged on the top surface of the top plate portion 32, and the base portion thereof is rotatably supported by the top plate portion 32 by a pin 39. The shutter arm 38 rotates between a shutter closed position shown by a solid line in FIG. 1 and a shutter open position shown by a chain double-dashed line in FIG. The rotation stroke of the shutter arm 38 with respect to the insertion stroke of the disc cartridge 1 is set smaller than that of the conventional one. A coil spring 40 is interposed between the shutter arm 38 and the top plate portion 32, and the spring force of the coil spring 40 urges the shutter arm 38 toward the shutter closed position. At the shutter closed position, the release pin 41 receives the spring force of the coil spring 40 by contacting the top plate portion 32, and the shutter arm 38 is restricted so as not to move to the side opposite to the shutter open position beyond the shutter closed position. There is. The release pin 41 has a cylindrical shape and is vertically provided at the tip of the shutter arm 38, and the lower portion of the release pin 41 projects into the cartridge insertion chamber 35. The length of the release pin 41 is shorter than that of the conventional one.

The operation of the above configuration will be described below.

In the disc cartridge 1, the lock member 19 is in the lock position and the shutter 9 is locked when the disc is not mounted. When the disc cartridge 1 is inserted into the cartridge insertion chamber 35 through the cartridge insertion opening (not shown), the disc cartridge 1 is moved to the mounting position by the mounting process including the inserting process and the descending process of lowering the disc cartridge 1 downward. To be done.

First, in the insertion process, as shown by the solid line in FIG. 3, the release pin 41 enters the pin insertion groove 13 of the shutter 9 and the release pin 41 presses the lock member 19 to release the shutter lock. Further, when the disc cartridge 1 is inserted, the shutter arm 38 is pushed by the lock member 19 and rotationally moves to the shutter open position side against the spring force of the coil spring 40, and the release pin 41 enters the guide groove 28. Further, when the disc cartridge 1 is inserted, the release pin 41 moves in the guide groove 28 while pressing the shutter opening direction surface 14 of the pin insertion groove 13, and the shutter 9 slides in the opening position direction. When the disc cartridge 1 is inserted to the insertion completion position, the shutter arm 38 is located at the shutter open position and the shutter 9 is located at the open position as shown by the chain double-dashed line in FIG. The turntable insertion hole 6 opens.

Next, in the descending process, the head is inserted from the head insertion hole 7 and the turntable is chucked at the center of the disk 5 to be in a recordable / reproducible state.

When the eject mode is selected in this state, the disc cartridge 1 is ejected from the cartridge insertion chamber 35 by an ejection process including an ascending process of moving the disc cartridge upward and a withdrawal process of withdrawing to the disc insertion opening side.

First, the head retreats from the head insertion hole 7 in the ascending process and the chucking of the turntable is released.

Next, the shutter arm 38 pushes the disc cartridge 1 in the ejecting direction by the spring force of the coil spring 40 in the drawing process.
As the disc cartridge 1 moves in the ejecting direction, the shutter arm 38 rotates and moves to the shutter closed position side.
Since the release pin 41 moves with the shutter arm 38 in the guide groove 28 while pressing the shutter closing direction surface 15 of the pin insertion groove 13, the shutter 9 slides in the closing position direction. When the shutter arm 38 comes close to the shutter closed position, the release pin 41 comes out of the inlet 28a of the guide groove 28, and the lock member 19 again elastically deforms as shown by the chain double-dashed line in FIG. The shutter 9 comes to the closed position and the shutter 9 slides to the closed position. When the disc cartridge 1 moves in the ejecting direction by the inertial force of movement of the disc cartridge 1, the release pin 41 comes out of the pin insertion groove 13 and the lock member 19 moves to the third position.
The shutter is locked by elastically deforming to the position shown by the solid line in the figure. When the shutter 9 slides to the closed position, the head insertion hole 7 and the turntable insertion hole 6 close, and when the shutter arm 38 reaches the shutter closed position, the rear end side of the disc cartridge 1 protrudes from the cartridge insertion port and the disc cartridge 1 opens. Can be pulled out.

In the mounting process and the discharging process, the shutter arm 3
At a position other than the shutter closed position, even if the releasing pin 41 tries to come out of the pin inserting groove 13 due to an external force acting on the releasing pin 41 during the inserting process or the ejecting process as shown in FIG. The rotation of the release pin 41 is blocked by the pin removal prevention portion 25 of the lock member 19. Therefore, the release pin 41 does not slip out of the pin insertion groove 13, and the shutter 9 is opened and closed reliably.

In this embodiment, the guide groove 28 is formed in the lock member 1.
9 is formed, but the notch is provided in the case 2 to form the guide groove 2
8 may be configured. However, if the lock member 19 having elasticity as in this embodiment is used, the collision force with which the release pin 41 collides with the pin pull-out preventing portion 25 is elastically deformed when the disc cartridge 1 is pulled out during the insertion process. The release pin 41 has a surface contact with the pin sliding portion 24 and slides, so that the durability is good and the generation of abrasion powder can be prevented as much as possible.

[Advantages of the Invention] As described above, according to the present invention, in the shutter opening / closing mechanism of the disc cartridge, which opens the shutter by inserting the release pin into the pin insertion groove of the shutter in the process of inserting the disc cartridge, the case side is not provided. A guide groove is provided for moving the release pin that has entered the pin insertion groove, and the release pin enters the guide groove only at the shutter closed position.
Since it is configured to be able to slip out, there is an effect that the release pin does not slip out of the pin insertion groove at a position other than the shutter closed position in the mounting process and the discharging process of the disk cartridge, and the shutter is reliably opened and closed.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a partially enlarged exploded perspective view of a disc cartridge, FIG. 2 is a partially enlarged plan view of the disc cartridge, and FIG. FIG. 4 is a plan view of the mechanism, FIG. 4 is a view showing a state in the middle of the process of inserting and withdrawing the disc cartridge, and FIG. 5 is a perspective view of the cartridge holder.
FIG. 8 to FIG. 8 show a conventional example, FIG. 6 is a perspective view of a shutter opening / closing mechanism, FIG. 7 is a plan view of the shutter opening / closing mechanism, and FIG.
The figure is a diagram showing a state in the middle of the process of inserting and pulling out the disc cartridge. DESCRIPTION OF SYMBOLS 1 ... Disk cartridge, 2 ... Case, 7 ... Head insertion hole, 9 ... Shutter, 13 ... Pin insertion groove, 28 ... Guide groove, 30 ... Disk drive device, 31 ... Cartridge holder, 35 ... Cartridge insertion chamber, 38 ... Shutter Arms, 40 ... Coil springs (biasing means), 41 ... Release pins.

Claims (1)

[Scope of utility model registration request] 1. A shutter is attached to a case having a head insertion hole, and the shutter is slidable between a closed position for closing the head insertion hole and an open position for opening the head insertion hole. Is equipped with a shutter arm on a disk cartridge provided with a pin insertion groove and a cartridge holder provided with a cartridge insertion chamber. A release pin is provided on the tip end side of the shutter arm, and the shutter arm is provided between the shutter closed position and the shutter open position. And a disc drive device provided with an urging means for urging the shutter to the shutter closed position side, in the insertion process of inserting the disc cartridge into the cartridge insertion chamber. With the release pin inserted in the pin insertion groove, A shutter opening / closing mechanism for a disk cartridge in which the shutter arm rotates from the shutter closed position to the shutter open position against the biasing force of the biasing means, and the shutter slides from the closed position to the open position following the rotation of the shutter arm. In the case side, a guide groove for moving the release pin that has entered the pin insertion groove is provided, and the release pin can enter / exit only in the vicinity of the shutter closed position and exit in other positions. A shutter opening / closing mechanism for a disk cartridge, which is configured to be disabled.