JP3702811B2 - Flexible disk device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flexible disk device (hereinafter abbreviated as FDD) that drives a flexible disk (hereinafter abbreviated as FD), and more particularly to an FDD provided with a head protection mechanism.
[0002]
[Prior art]
FIG. 4 is an exploded perspective view of a conventional FDD. In FIG. 4 , 1 is a holder provided with an arm lifter 1a and a protrusion 1b, 2 is a slider provided with a guide groove 2a, 3a is a top head, and 3b is a bottom surface. The head 4 is an arm provided with an arm lifter receiver 4a and a leaf spring 4b, 5 is a carriage, 6 is a frame, 7 is a latch lever, 7a is a tension spring, and 8 is a head biasing spring. 5 is a top view of a conventional FDD, FIG. 6 is an operation explanatory diagram of the arm lifter 1a, FIG. 7 is an operation explanatory diagram of the FDD before inserting the FD, and 9 is an FD. 8 is an operation explanatory view of the FDD after inserting the FD 9 , FIG. 9 is an external view of the holder 1, FIG. 10 is an operation explanatory view when a vertical external force is applied to the FDD, and FIG. 11 is a plate spring of the FDD. It is operation | movement explanatory drawing when external force is added to 4b.
[0003]
Next, the operation of the conventional FDD will be described. The arm lifter 1a provided in the holder 1 and the arm lifter receiver 4a provided in the arm 4 are joined before the FD 9 is inserted, and the upper surface head 3a is retracted. The tension spring 7a has one end supported by the holder 1 and the other end supported by the slider 2 to urge the slider 2 in the arrow B direction. In a state before the FD 9 is inserted, the holder 1 is arranged at the FD insertion position on the upper side of the driving range as shown in FIG. 7 with the protrusion 1b fitted into the upper portion of the guide groove 2a. In this case, since the arm lifter 1a provided in the holder 1 is also located above the driving range, the arm 4 is also moved upward as shown in FIG. 6 to retract the top head 3a upward.
[0004]
Then, when you insert FD9 to FDD, the latch lever 7 as shown by FIG. 8 is moved pushed by the arrow A direction FD9. As a result, the latch between the slider 2 and the latch lever 7 is released, the slider 2 moves in the direction indicated by the arrow B, and the protrusion 1b fitted to the guide groove 2a descends along the guide groove 2a. Moves to the FD drive position in the drive range. Thus, since Amurifuta 1a also moves to the lower side of the driving range, the arm 4 is urged by the head biasing spring 8 is also moved downward, the upper surface head 3 of FIG. 10 to move downwardly In such a state, it comes into contact with the medium surface (not shown) of the FD 9 and enters a recording / reproduction waiting state.
[0006]
[Problems to be solved by the invention]
The conventional FDD is configured as described above, and has the following problems.
The arm 4 and the carriage 5 are connected by a leaf spring 4b, and the arm 4 is biased by a coil spring 8 toward the lower surface head 3b. Thus, for example, when a large impact such as occurring when dropped FDD is applied to the leaf spring 4b, the leaf spring 4b is bent largely as shown in FIG. 11, as a fulcrum Amurifuta receiving 4a, top head 3a and the lower surface head There was a case where the head was damaged due to collision with 3b.
[0007]
The present invention has been made to solve the problems as described above, even if the deformed leaf spring due to impact from outside, in which the collision of the head to provide a hard FDD to occur.
[0008]
[Means for Solving the Problems]
A flexible disk device according to the present invention includes an upper surface head and a lower surface head that perform recording and reproduction on the upper and lower recording surfaces of a flexible disk, a carriage that sends the upper surface head and the lower surface head in the radial direction of the flexible disk, and the upper surface head, respectively. An arm for supporting the arm, a leaf spring for connecting the arm to the carriage, an urging means for urging the arm in the recording surface direction of the flexible disk, an insertion position and a driving position while holding the flexible disk. A holder that moves between the holder and the upper surface of the holder.When the flexible disk is not inserted, the holder is positioned at the insertion position.When the flexible disk is inserted, the holder is The slider to be positioned at the drive position and the top Provided in the plate spring side of the arm, and Amurifuta receiving member of a pair of projecting horizontally from opposite sides of the arm, provided in the holder, of the pair when the holder is in the inserted position Amurifuta An arm lifter that abuts the receiving member and retracts the upper surface head, and a rotating shaft disposed on the holder, and rotates about the rotating shaft as the flexible disk is inserted, and the holder is inserted. An arm supporting portion that protrudes from the side of the arm when in the position, and has an arm locking portion located below the arm on the upper surface head side and in the vicinity of the upper surface head from the arm lifter receiving member. It is equipped with.
[0009]
In addition, an FD engagement portion that contacts the flexible disk is provided in the arm support portion, and the arm support portion moves when the FD engagement portion that contacts the flexible disk moves in accordance with the insertion operation of the flexible disk. Is rotated around the rotation axis .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Figure 1 is a top view of the FDD shown in the first embodiment, FIG. 5 the same reference numerals will be omitted indicate the same or corresponding parts. In the figure, 20 is an arm locking member provided on the holder 1, 20a is an arm locking portion, and 20b is an FD engaging portion. Reference numeral 21 denotes a tension spring having one end supported by the holder 1 and the other end supported by the arm locking member 20. Also, FIG. 2 is a fragmentary side view of FIG. 1, FIG. 3 is an operation explanatory diagram in the case of inserting the FD9 to FDD shown in Figure 1.
[0015]
Next, the operation will be described. If not inserted the FD9 to FDD, the arm locking member arm engaging portion 20a provided in the 20, top head 3a is supported in contact with the upper surface head 3a near the arm 4 equivalents as shown in FIG. 2, The movement of the upper surface head 3a in the direction of the lower surface head 3b is locked. Next, when the FD 9 is inserted into the FDD, the FD engaging portion 20b is pushed by the FD 9 to move in the direction indicated by the arrow A, the slider 2 is moved to the right by the FD 9, and the arm locking member 20 is moved clockwise. Rotate. As a result, the engagement between the arm 4 and the arm locking portion 20a is released, and the upper surface head 3a moves in the direction of the lower surface head 3b and comes into contact with the medium surface of the FD 9 to enable reading and writing.
[0016]
Thus, when the FD 9 is not inserted in the FDD, even if the leaf spring 4b is deformed by an external impact and the upper surface head 3a tries to move toward the lower surface head 3b, the arm locking portion 20a locks the movement. Therefore, the upper surface head 3a and the lower surface head 3b are protected and the impact resistance is improved.
[0018]
【The invention's effect】
The present invention has an effect of preventing the upper surface head from colliding with the lower surface head due to an external impact.
[Brief description of the drawings]
FIG. 1 is a top view of a flexible disk device according to a first embodiment of the present invention.
2 is a cross-sectional view of a main part of the flexible disk device shown in FIG.
3 is a top view when a flexible disk is inserted into the flexible disk device shown in FIG. 5. FIG.
FIG. 4 is an exploded perspective view of a conventional FDD.
FIG. 5 is a top view of a conventional FDD.
FIG. 6 is an operation explanatory diagram of an arm lifter.
FIG. 7 is an operation explanatory diagram of FDD before FD insertion.
FIG. 8 is an operation explanatory diagram of FDD after FD insertion.
FIG. 9 is an external view of a holder.
FIG. 10 is an operation explanatory diagram when an external force in the vertical direction is applied to the FDD.
FIG. 11 is an operation explanatory diagram when an external force is applied to the leaf spring.
[Explanation of symbols]
20 Arm locking member 20a Arm locking portion 20b FD engaging portion 21 Tension spring

Claims (2)

An upper surface head and a lower surface head that perform recording and reproduction on the upper and lower recording surfaces of the flexible disk, respectively;
A carriage for feeding the upper surface head and the lower surface head in the radial direction of the flexible disk;
An arm for supporting the upper surface head;
A leaf spring connecting the arm to the carriage;
Urging means for urging the arm toward the recording surface of the flexible disk;
A holder that holds the flexible disk and moves between an insertion position and a driving position;
A slider that is disposed to face the upper surface of the holder, and when the flexible disk is not inserted, the holder is positioned at the insertion position, and when the flexible disk is inserted, a slider that positions the holder at the driving position;
A pair of arm lifter receiving members provided near the leaf spring of the arm and projecting horizontally from both sides of the arm;
An arm lifter provided on the holder, wherein the upper surface head is retracted by contacting the pair of arm lifter receiving members when the holder is in the insertion position;
A rotating shaft disposed on the holder, rotating around the rotating shaft with the insertion operation of the flexible disk, and protruding from the side of the arm when the holder is in the insertion position; A flexible disk device, comprising: an arm support portion having an arm locking portion located below the arm on the upper surface head side and in the vicinity of the upper surface head from the arm lifter receiving member.   An FD engaging portion that contacts the flexible disk is provided in the arm supporting portion, and the arm supporting portion moves as the FD engaging portion that contacts the flexible disk moves along with the insertion operation of the flexible disk. 2. The flexible disk device according to claim 1, wherein the flexible disk device is rotated about a rotation axis.

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