JP2722511B2 - Disc cartridge shutter opening and closing mechanism - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge shutter opening / closing mechanism for opening and closing a disk cartridge shutter when a disk cartridge is mounted on or ejected from a disk drive.

SUMMARY OF THE INVENTION According to the present invention, a disk cartridge is formed by slidably attaching a shutter to a case. When the disk cartridge is inserted into a cartridge insertion chamber of a disk drive device, a release pin pushes the shutter and slides a pin of the case. In a disk cartridge shutter opening / closing mechanism configured such that the release pin slides into the recess when the shutter moves to the open position by sliding the surface, the surface of the recess on the shutter closed position side is formed as a tapered surface. This prevents an accident that the disc cartridge is not ejected at the time of ejection when the release pin is sandwiched between the shutter and the case.

[Prior Art] A disk cartridge in which a disk is rotatably housed in a case is designed so that dust does not enter the case from the head insertion hole or touch the disk with a finger when the disk is not mounted. A shutter is provided. This shutter is set to an open position during the mounting process of the disk cartridge, and the shutter set to the open position is set to the closed position during the discharging process of the disk cartridge.
FIG. 1 shows a conventional shutter opening / closing mechanism.

In FIG. 5, in the disk drive device 30, a cartridge holder 31 is provided to be able to move up and down with respect to a main body case (not shown). 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 a base end of the shutter arm 38 is rotatably supported. At the tip of the shutter arm 38, a columnar release pin 41 is vertically provided, and the release pin 41 projects into the cartridge insertion chamber 35. The shutter arm 38 rotates between a shutter closed position and a shutter open position, and a coil spring 40 serving as first urging means is interposed between the shutter arm 38 and the cartridge holder 31. The shutter 9 is urged toward the shutter closed position by force.

In FIG. 6, the case 2 of the disc cartridge 1
Has an uneven square shape, and a disk 5 is rotatably accommodated in the case 2. Head insertion holes 7 are formed on the upper and lower surfaces of the case 2 at positions facing each other, and the head insertion holes 7 are opened and closed by shutters 9. In addition, a pin sliding surface is provided on the front end side of the case 2 where the shutter 9 slides.
The release pin 41 slides on the pin sliding surface 14. A recess 15 is formed at the shutter open position of the release pin 41 on the pin sliding surface 14. The shutter 9 is formed in a substantially U-shape from an upper surface portion 10, a lower surface portion 11, and a front surface portion 12 connecting these members, and is 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 the same. Also, shutter 9
A pin insertion groove 13 is formed by cutting a part of the upper surface part 10, the lower surface part 11, and the front part 12 on the front end side of the. This pin insertion groove
A spring locking portion 17 is provided near the front portion 13 by bending a part of the front portion 12, and a torsion spring 18 is attached to the spring locking portion 17.
Is locked, and the shutter 9 is urged toward the closed position. The lock member 19 has one end supported by the case 2 and the other end disposed in the pin insertion groove 13.
One end of the torsion spring 18 is locked to 20.

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 a solid line in FIG. The pin 19 is elastically deformed to the back of the pin insertion groove 13, the locking groove 20 escapes from one end of the torsion spring 18, and the shutter lock is released. Further, when the disc cartridge 1 is inserted, the shutter arm 38 rotates and moves in the direction of the 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 41 slides on the pin sliding surface 14 while pressing the shutter 9, and the shutter 9
Slides toward the open position. Disk cartridge 1
7, 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, as shown by the two-dot chain line in FIG. As shown in detail in FIG. 8, the release pin 41 falls into the recessed portion 15 due to the spring force of the coil spring 40, enters the pin insertion groove 13 deeply, and the release pin 41 easily comes out of the pin insertion groove 13 due to an external force or the like. Not to be placed. At the same time as the disk cartridge 1 is inserted to the insertion completed position, the cartridge holder 31 is lowered by holder raising / lowering means (not shown), so that the movement of the disk cartridge 1 in the pull-out direction is restricted and the disk cartridge 1 is moved.
Is located at the cartridge mounting position. During this lowering process, the head is inserted into the head insertion hole 7 and the disk 5
The turntable is chucked to the hub section of the above, and the recording and reproduction are enabled.

If the eject mode is selected when the disc cartridge 1 is located at the mounting position, the cartridge holder 31 first rises to move the head out of the head insertion hole 7 and release the chucking of the turntable, contrary to the above operation. Further, the movement of the disk cartridge 1 in the pull-out direction is allowed. When the lifting process is completed, the shutter arm 38 rotates in the direction indicated by the arrow e in FIG. 7 by the spring force of the coil spring 40, and the disk cartridge 1 is pushed in the pull-out direction. With the movement of the disk cartridge 1 in the pulling-out direction, the release pin 41 comes out of the recess 15 and slides on the pin sliding surface 14 toward the shutter closing position. The shutter 9 slides in the closing position direction by the spring force of the torsion spring 18 while being restricted by the movement of the release pin 41. When the release pin 41 is located at the shutter closed position, the shutter 9 slides to the closed position to close the head insertion hole 7 and one end of the torsion spring 18 enters the locking groove 20 of the lock member 19 to be in a locked state, and the discharging process is performed. Is completed.

[Problems to be Solved by the Invention] However, in the above-described ejection process, when the disk cartridge 1 completes the ascending process and moves to the withdrawing process, the eighth process is performed.
As shown in the figure, the disc cartridge 1 is pressed by the release pin 41 by the component force F _A1 of the force F _A by the spring force of the coil spring 40, but the release pin 41 receives the following external force. That is, the resultant force of the reaction force of the component force F _A2 and the spring force F _B of the spring force F _B from the surface 42 of the shutter closing position side of the recess portion 15 with receiving the above force F _A of the torsion spring 18 from the shutter 9 ( F _A2 + F _B ), the release pin 41 is sandwiched between the shutter 9 and the case 2. As a result, an accident occurred in which the release pin 41 could not easily come out of the recessed portion 15 due to the sandwiching force, and the disc cartridge was not ejected at the time of ejection.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a disk cartridge shutter opening / closing mechanism that prevents an accident that occurs when a release pin is pinched between a shutter and a case.

Means for Solving the Problems A shutter opening / closing mechanism for a disk cartridge according to the present invention for achieving the above object has a cartridge insertion chamber into which a disk cartridge can be inserted, and is arranged in the cartridge insertion chamber and has a shutter closing position. And a release pin movable between the shutter open position and a disk drive device provided with first biasing means for biasing the release pin toward the shutter closed position, and the release pin slides on the case. A pin sliding surface is provided, and at one end of the pin sliding surface, a depression portion is provided for the release pin to move and comes down when it comes to a shutter open position, and an open position for opening a head insertion hole is provided in the case. And a shutter provided slidably between the head insertion hole and a closed position for closing the head insertion hole, and a second urging means for urging the shutter toward the closed position. In the shutter opening / closing mechanism for a disk cartridge provided with a disk cartridge, a surface of the recessed portion that is continuous with the pin sliding surface is formed as a tapered surface.

[Operation] When the disk cartridge is inserted into the cartridge insertion chamber of the disk drive device, the release pin slides on the pin sliding surface against the first biasing means, and the shutter is pushed by the release pin to release the second release pin. It slides toward the open position against the urging means. When the release pin moves to the shutter open position, the shutter slides to the open position and the release pin falls into the recess. In the ejection process, the disk cartridge is pushed in the pull-out direction by some means, and the disk cartridge moves in the pull-out direction. The release pin is sandwiched between the shutter and the surface of the concave portion that is continuous with the pin sliding surface by receiving the urging force of the second urging means, but is continuous with the pin sliding surface of the concave portion. Since the side surface is a tapered surface, the pinching force is weak, and the release pin slips out of the depression and slides on the pin sliding surface.

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

1 to 4 show one embodiment of the present invention.

Since the configuration of the disk drive device 30 is the same as that of the conventional disk drive device, the description thereof is omitted.

In FIG. 1, the outside of a disk cartridge 1 is covered with a case 2 having a substantially uneven square shape. The case 2 is configured by joining an upper case member 3 and a lower case member 4 to each other at peripheral edge surfaces. A disk 5 is rotatably accommodated in the case 2. A turntable insertion hole 6 is formed substantially at the center of the lower case member 4, and a turntable of the disk drive device is inserted through the turntable insertion hole 6. Head insertion holes 7 are respectively formed at positions 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 holes 7. 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 so as to be depressed one step inside from other portions. The shutter 9 slides on the shutter slide surface 8. or,
A pin sliding surface 14 is formed on the front end side of the case 2 where the shutter 9 slides. The pin sliding surface 14 is moved by the release pin 41 of the disk drive device 30 between the shutter closed position and the shutter open position. Slide. A recess 15 is provided at the shutter open position of the release pin 41 on the pin sliding surface 14. As shown in FIGS. 1 and 4, the surface of the recess 15 on the side continuous with the pin sliding surface is formed as a tapered surface 15a having an inclination angle α (less than 90 °).

The shutter 9 is formed in a substantially U-shape from an upper surface portion 10, a lower surface portion 11, and a front surface portion 12 connecting them, and is attached to the case 2 so as to sandwich the case 2. Lower part 11
Is provided with a guide claw 16 which also serves as a lock.
16 is inserted into a guide groove (not shown) of the lower case member 4. The shutter 9 slides between a closed position for closing the head insertion hole 7 and the turntable insertion hole 6 and an open position for opening the head insertion hole 7 and the turntable insertion hole 6 as the guide claw 16 moves in the guide groove. On the front end side of the shutter 9, a pin insertion groove 13 is formed by cutting a part of the upper surface portion 10, the lower surface portion 11, and the front surface portion 12. A spring locking portion 17 is provided near the pin insertion groove 13 by cutting out and bending a part of the front surface portion 12. One end of a torsion spring 18 as a second urging means is locked to the spring locking portion 17, and the other end is connected to the lower case member 4.
Shutter 9 is torsion spring
It is urged toward the closed position by an urging force of 18.

The lock member 19 is formed of an elastic body, one end of which is supported by the pin portion 21 of the lower case member 4 and the other end of which is disposed in the pin insertion groove 13. Lock member 19
Is formed with a locking groove 20, and one end of the torsion spring 18 is locked in the locking groove 20. Thus, the locking member
As shown in FIG. 2, reference numeral 19 denotes a locking position where one end of the torsion spring 18 is locked in the locking groove 20 to lock the shutter 9; 20 moves between one end of the torsion spring 18 and an unlock position where the shutter 9 is unlocked.

 Hereinafter, the operation of the above configuration will be described.

In the disk cartridge 1, when the disk is not mounted, the lock member 19 is at the lock position and the shutter 9 is locked. When the disk cartridge 1 is inserted into the cartridge insertion chamber 35 from a cartridge insertion opening (not shown), the disk cartridge 1 is positioned at the mounting position by a lowering process of lowering the disk cartridge 1 during the insertion process.

First, during the insertion process, the release pin 41 enters the pin insertion groove 13 of the shutter 9 as shown in FIG.
41 presses the lock member 19 to release the shutter lock. Further, when the disc cartridge 1 is inserted, the release pin 41 comes into contact with the pin sliding surface 14, and the shutter arm 38 is moved to the shutter open position side (the second position) against the spring force of the coil spring 40.
It rotates in the direction (a direction in the figure). With the release pin 41 pressing the shutter 9 together with the shutter arm 38, the pin sliding surface
Then, the shutter 9 slides in the direction of the open position.
When the disk cartridge 1 is inserted to the insertion completed position, the shutter arm 38 is located at the shutter open position and the shutter 9 is located at the open position as shown in FIG. 6 opens.
Also, the release pin 41 is pressed by the spring
And into the pin insertion groove 13 deeply.

Next, during the descending process, a positioning pin (not shown) on the drive side is inserted into a positioning groove (not shown) of the disk cartridge 1 to position the disk cartridge 1 and restrict movement in the pull-out direction.
Further, 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 a process of moving the disc cartridge upward and a process of being pulled out toward the disc insertion port.

First, the head withdraws from the head insertion hole 7 during the ascent process, and the chuck of the turntable is released.
In addition, the positioning pin comes out of the positioning groove, and the disk cartridge 1 is allowed to move in the pull-out direction.

Next, the extraction process, the release pin 41 at the component force F _A1 spring force F _A of the coil spring 40 pushes the disk cartridge 1 in the pull-out direction. Then, the disk cartridge 1 moves in the pulling-out direction, and the shutter arm 38 rotates and moves to the shutter closing position side (b direction in FIG. 3) following this movement, and the release pin 41 comes out of the concave portion 15. Here, as shown in FIG. 4, the tapered surface 15 of the recess portion 15 with the release pin 41 receives a spring force F _B of the torsion spring 18 from the shutter 9
From a, the reaction force (F _A2) due to the component force F _A2 of the above force F _A and the spring force F _B
+ F _B) under the force of sinα are sandwiched by the shutter 9 and the case 2. However, since the force from the surface on the shutter closed position side is smaller than that of the related art and the direction is inclined as shown in FIG. 4, the release pin 41 easily comes out of the recess 15. The release pin 41 coming out of the recess 15 slides the pin sliding surface 14 toward the shutter closing position while moving the disk cartridge 1 in the pulling-out direction by the spring force of the coil spring 40. The shutter 9 slides in the closing position direction by the spring force of the torsion spring 18 while being restricted by the movement of the release pin 41. When the release pin 41 is located at the shutter closed position, the shutter 9 slides to the closed position to close the head insertion hole 7 and one end of the torsion spring 18 enters the locking groove 20 of the lock member 19 to be in a locked state, thereby pulling out. Is completed. When the release pin 41 reaches the shutter closing position, the rear end side of the disk cartridge 1 protrudes from the cartridge insertion port, and the disk cartridge 1 can be pulled out from the cartridge insertion port.

In this embodiment, a pin insertion groove 13 is formed in the shutter 9, and a release pin 41 is inserted into the pin insertion groove 13 so that the shutter 9
However, the shutter may be slid by pressing the end surface of the shutter 9 with the release pin 41 without forming the pin insertion groove 13 in the shutter 9.

[Effects of the Invention] As described above, according to the present invention, a shutter is slidably mounted on a case to form a disk cartridge, and when the disk cartridge is inserted into a cartridge insertion chamber of a disk drive device, a release pin causes the shutter to move. In the disk cartridge shutter opening / closing mechanism configured to slide the pin sliding surface of the case while pushing and release the shutter to the open position when the shutter moves to the open position, the release pin is continuous with the pin sliding surface of the concave portion. Since the side surface is formed as a tapered surface, it is possible to prevent an accident in which the release pin is sandwiched between the shutter and the case and the disc cartridge is not ejected upon ejection.

[Brief description of the drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a partially exploded perspective view of a disk cartridge, FIG. 2 is a plan view of a shutter opening / closing mechanism in a shutter closed position, and FIG. 3 is a shutter open position. FIG. 4 is an enlarged plan view of an essential part of the shutter opening / closing mechanism, FIGS. 5 to 8 show a conventional example of the present invention, FIG. 5 is a perspective view of a cartridge holder, and FIG. FIG. 7 is a partially exploded perspective view of the disk cartridge, FIG. 7 is a plan view of a shutter opening / closing mechanism, and FIG. 8 is an enlarged plan view of a main part. 1 ... disk cartridge, 2 ... case, 7 ... head insertion hole, 9 ... shutter, 14 ... pin sliding surface, 15 ...
... recess, 15a ... taper surface, 18 ... torsion spring (second biasing means), 30 ... disk drive device, 35
... Cartridge insertion chamber, 40 coil spring (first biasing means), 41 release pin.

Claims (1)

(57) [Claims] A cartridge insertion chamber for inserting a disk cartridge, a release pin disposed in the cartridge insertion chamber and movable between a shutter closed position and a shutter open position, and the release pin is moved to the shutter closed position side. A disk drive device provided with first biasing means for biasing the release pin, and a case provided with a pin sliding surface on which the release pin slides, and the release pin is moved to one end of the pin sliding surface. Then, a recess is provided which falls when the shutter comes to the open position, and a shutter is slidably mounted on the case between an open position for opening the head insertion hole and a closed position for closing the head insertion hole, and the shutter is closed. A disc cartridge provided with a second urging means for urging to the position side; and a shutter opening / closing mechanism for the disc cartridge comprising: Shutter opening and closing mechanism of the disk cartridge to a side surface continuous to the dynamic surface and characterized by being configured to taper surface.