JP3590988B2 - Disk drive device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a disk drive device in which a disk cassette can be inserted into and pulled out of a cassette holder.
[0002]
[Prior art]
FIG. 4 is a perspective view of a main part of a conventional disk drive device. In FIG. 4, a detection switch SW and a cassette holder 10 are arranged on a chassis 3. The cassette holder 10 is configured to be vertically movable with respect to the chassis 3, and is displaced between a cassette insertion position (elevated position) separated from the chassis 3 and a cassette mounting position (descent position) adjacent to the chassis 3. I do.
[0003]
The cassette holder 10 has a cassette storage chamber 19 into which a disk cassette DK can be inserted and pulled out. A pair of left and right cassette guides 20a and 20b are provided at the entrance of the cassette storage chamber 19 and on the chassis 3 side. Have been. A hole 21 is formed in one of the cassette guide portions 20a, and the detection switch SW is located below the hole 21.
[0004]
In the above configuration, when the cassette holder 10 is at the cassette insertion position and the disc cassette DK is inserted into the cassette storage chamber 19, the disc cassette DK is inserted by being guided by the pair of left and right cassette guide portions 20a and 20b. Even if the direction is slightly shifted, it is inserted smoothly. When the disk cassette DK is inserted to the insertion completed position, the cassette holder 10 is displaced to the cassette mounting position. Then, the detection rod 9 of the detection switch SW enters through the hole 21 of the cassette guide portion 20a due to the relative displacement due to the lowering of the cassette holder 10, and the state of the disk cassette DK (the presence or absence of the cassette, the write protection Is determined.
[0005]
[Problems to be solved by the invention]
However, when the disk cassette DK is inserted into the cassette storage chamber 19 with the corner 1a of the disk cassette DK upright as shown in FIG. 1a may enter the hole 21 of the cassette guide 20a. Then, an accident occurred in which the corner 1a of the disk cassette DK hit the detection rod 9 of the detection switch SW and destroyed the detection switch SW.
[0006]
Accordingly, it is an object of the present invention to provide a disk drive device in which a detection switch is prevented from being destroyed.
[0007]
[Means for Solving the Problems]
The disk drive apparatus of the invention according to the present invention for achieving the above object, place the detection switch and the cassette holder on the chassis, constitutes a cassette accommodation chamber for inserting the disk cassette into the cassette holder, the cassette containing chamber A disk guide device provided with a cassette guide portion having a tapered portion formed in a tapered shape approaching the chassis toward the cassette insertion side on the chassis side at an entrance of the cassette guide portion, A hole is provided to allow the detection switch to enter, and at least a portion of the hole corresponding to the tapered portion has a width such that a corner of the disk cassette does not enter and contact the detection switch. And
[0010]
[Action]
According to the present invention , when the disc cassette is inserted with its corners upright, the cassette guide has a hole that allows the detection switch to enter, and at least a portion of the hole corresponding to the tapered portion is the disc cassette. Of the disc cassette is hardly inserted into the hole.
[0011]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show one embodiment of the present invention. FIG. 1 is an exploded perspective view of the disk drive device. In FIG. 1, a disk cassette DK detachable from a disk drive device has an uneven square shape, and a disk (not shown) serving as a recording medium is rotatably stored in a case 1. A shutter 2 is slidably mounted in the direction of arrow A on the front side of the insertion of the disk cassette DK, and is biased toward the closed position by a spring (not shown).
[0012]
The chassis 3 of the disk drive device includes a main chassis 3a and a pair of side plates 3b disposed on the left and right ends. A large hole 4 is formed in the main chassis 3a, and a flat spindle motor 5 is disposed in the hole 4. A head mechanism 6 is mounted on the main chassis 3a, and a head carriage 7 of the head mechanism 6 is slidable in the direction of arrow B. The head carriage 7 is provided with a pair of upper and lower head elements 8, and a signal is transmitted between the pair of head elements 8 and the disk. Further, two detection switches SW are mounted on the main chassis 3a, and each detection switch SW operates depending on whether or not the detection rod 9 (shown in FIGS. 3A and 3B) is pressed. I do. These detection switches SW detect the presence / absence of the disk cassette DK and the presence / absence of write protection.
[0013]
The cassette holder 10 and the slide member 11 are arranged above the main chassis 3a so as to overlap each other. A pair of regulating pins 12 are provided at central positions on both left and right sides of the cassette holder 10, respectively. The pair of regulating pins 12 are inserted into the vertical guide holes 13 of the pair of side plates 3b. Therefore, only the movement of the cassette holder 10 in the vertical direction (the direction of the arrow C) is allowed by the vertical guide hole 13. Restriction pins 14 are provided on both left and right sides of the slide member 11, respectively. The restriction pins 14 are inserted into the horizontal guide holes 15 of the pair of side plates 3b. Therefore, the slide member 11 is allowed to move only in the horizontal direction (the direction of the arrow D) by the horizontal guide hole 15.
[0014]
A pair of cam pins 16 are provided at front and rear positions on both left and right sides of the cassette holder 10, and the cam pins 16 are inserted into the inclined cam holes 17 of the slide member 11, respectively. That is, the elevation of the cassette holder 10 is controlled by the sliding of the slide member 11, and the cassette holder 10 is displaced between the cassette insertion position shown in FIG. 3A and the cassette mounting position shown in FIG. 3B. A pair of tension coil springs 18 is mounted between the cassette holder 10 and the slide member 11, and the slide member 11 is urged to a position corresponding to the cassette mounting by this spring force.
[0015]
The cassette holder 10 has an upper surface portion 10a, a pair of side surface portions 10b hanging down on both sides thereof, and a pair of bottom edge portions 10c (shown in FIGS. 3A and 3B) which enter inside at lower ends thereof. The cassette storage chamber 19 is constituted by a space surrounded by these. When the cassette holder 10 is located at the cassette insertion position, the disk cassette DK can be inserted into the cassette storage room 19, and the disk cassette DK can be pulled out from the cassette storage room 19.
[0016]
The cassette holder 10 is provided with a pair of left and right cassette guide portions 20a, 20b at the entrance of the cassette storage chamber 19 and on the main chassis 3a side. The cassette insertion side of the pair of cassette guide portions 20a, 20b is formed in a tapered shape in a direction gradually approaching the main chassis 3a toward the front end. A hole 21 is formed in one of the cassette guide portions 20a, and the detection switch SW is located below the hole 21. On the cassette insertion side of the hole 21, there is provided an entry preventing portion 22 for preventing entry of the corner 1a of the disk cassette DK. In this embodiment, the entry preventing portion 22 makes the cassette insertion side of the hole 21 narrower. It is constituted by doing.
[0017]
The cassette holder 10 is also provided with cassette guides 20 on the upper surface and the left and right sides on the entrance side of the cassette storage chamber 19, respectively, so that the disk cassette DK can be smoothly inserted.
[0018]
The slider lock mechanism 23 has a trigger arm 24 rotatably supported by the cassette holder 10. The trigger arm 24 rotates between a lock position shown in FIG. It is biased toward the lock position by a spring force. At one end of the trigger arm 24 is provided a shutter opening 25 which has entered the cassette storage chamber 19, and at the other end of the trigger arm 24 is provided a lock fan-shaped portion 26. The lock piece 27 of the slide member 11 is disengaged from the end face of the lock fan-shaped portion 26. That is, at the lock position of the trigger arm 24, the cassette holder 10 is positioned at the cassette insertion position by holding the slide member 11 at the cassette insertion facing position against the tension coil spring 18.
[0019]
In the above configuration, when the cassette holder 10 is located at the cassette insertion position shown in FIG. 3A and the disk cassette DK is inserted into the cassette storage chamber 19, the insertion end of the disk cassette DK becomes a pair of left and right cassette guide portions 20a, 20b. Even if the insertion direction and the insertion position are slightly displaced by being guided, etc., the insertion is performed smoothly. The shutter 2 is gradually opened by being pressed by the shutter opening portion 25 during the process of inserting the disk cassette DK. When the shutter 2 is fully opened and the disk cassette DK is inserted to the insertion completed position, the lock piece 27 is released from the end surface of the lock fan-shaped portion 26, and the slide member 11 is mounted on the cassette by the spring force of the pair of tension coil springs 18. The cassette holder 10 is displaced to the corresponding position side, whereby the cassette holder 10 is displaced to the cassette mounting position shown in FIG.
[0020]
During the above operation, as shown in FIG. 2, when the disc cassette DK is inserted with the corner 1a upright, the corner 1a of the disc cassette DK comes into contact with the entry preventing portion 22 so that the inside of the hole 21 of the cassette guide portion 20a is formed. Is rarely inserted. Therefore, the corner 1a of the disk cassette DK does not collide with the detection rod 9 of the detection switch SW.
[0021]
In the above-described embodiment, the entry preventing portion 22 of the cassette guide portion 20a is configured by narrowing the width of the hole 21 on the side where the cassette is inserted. However, if the shape is such that the corner portion 1a of the disk cassette DK can be prevented from entering. good. Further, the entry blocking portion 22 is provided only in one of the cassette guide portions 20a. However, when the detection switch SW is disposed below the cassette guide portions 20a and 20b on both the left and right sides, both the cassette guide portions 20a and 20b are provided. Each is provided with an entry blocking unit 22.
[0022]
In the above embodiment, the case where the cassette holder 10 moves up and down with respect to the chassis 3 is shown. However, the present invention is similarly applied to a device in which the cassette holder 10 is fixed with respect to the chassis 3 and the detection switch SW and the like move up and down. Can be applied.
[0023]
【The invention's effect】
As described above, according to the present invention, the cassette guide portion has a hole that allows the detection switch to enter, and at least a portion of the hole corresponding to the tapered portion is in which the corner of the disk cassette enters. As a result, the corners of the disc cassette are hardly inserted into the holes of the cassette guide section even when the disc cassette is inserted in a state where the corners of the disc cassette are upright. There is an effect that it can be prevented.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a disk drive device (embodiment).
FIG. 2 is a perspective view showing a state in which a corner of the disk cassette is set up and inserted into the cassette storage chamber (example).
FIG. 3A is a side view of a main part of a disk drive device located at a cassette insertion position, and FIG. 3B is a side view of a main part of the disk drive device located at a cassette mounting position (Example).
FIG. 4 is a partially exploded perspective view of a disk drive device (conventional example).
FIG. 5 is a perspective view showing a state in which a corner of a disk cassette is set up and inserted into a cassette storage chamber (conventional example).
[Explanation of symbols]
SW: detection switch DK: disc cassette 3: chassis 10: cassette holder 19: cassette storage chambers 20a, 20b: cassette guide section 21: hole 22: entry blocking section

Claims (1)

Place the detection switch and cassette holder on the chassis,
Configure the cassette accommodation chamber for inserting the disk cassette into the cassette holder,
A entrance of the cassette containing chamber and on the chassis side, a disk drive device provided with a cassette guide portion having a tapered portion which is tapered approaching the chassis toward the cassette insertion side,
The cassette guide has a hole that allows the detection switch to enter, and at least a portion of the hole corresponding to the tapered portion has a width that does not allow the corner of the disk cassette to enter and contact the detection switch. A disk drive device characterized by being made .

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