JPH0521720Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a head loading mechanism for a magnetic disk device that performs recording and reproduction by inserting a rotating magnetic disk between magnetic heads.

"Prior Art" An example of a conventional head loading mechanism is shown in FIG. 3. In FIG. 3, the arm 102, to which the head 101 is attached, is connected to the spring 10.
3, the disk cartridge 104 is always biased with a constant load. However, when the head is unloaded, the arm 102 comes into contact with the arm support part 105 on the upper surface of the holder by the supported part 106 against the biasing force of the spring 103, and is lifted toward the side opposite to the disk cartridge 104. Then, at the same time as the insertion of the disk cartridge 104 into the holder 107 is completed, the holder 10
7, the arm 102 descends and the head 101 is loaded into the disk cartridge 104.

"Problem to be solved by the invention" However, in the above conventional example, the holder 1
The gap between 07 and the head 101 is the arm support part 105.
The head 1 is determined by the position of the contact part of the supported part 106, so the head 1 is
When the disk cartridge 104 was inserted into the holder 107, the disk cartridge 104 came into contact with the head 101, causing the head 101 to be damaged or not to operate normally.

On the other hand, if the height of the head 101 becomes too high, the arm 102 will collide with the top cover of the disk device (not shown), which will prevent the holder 107 from rising to its normal height when the head is unloaded. This caused problems such as the arm 102 being deformed.

The present invention aims to solve these problems.

"Means for Solving the Problem" In order to achieve this objective, the head loading mechanism of the present invention is characterized in that the arm support part on the holder side is equipped with a gap adjustment mechanism that changes the gap between the holder and the head. shall be.

"action" The above technical means works as follows.

The gap adjustment mechanism provides an optimal gap between the holder and the head when unloading the head, so when inserting the disk cartridge into the holder, the disk cartridge will not touch the head, or
This can prevent the arm from hitting the top cover.

``Example'' Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is an overall perspective view of a magnetic disk device employing the present invention, and FIG. 2 is an enlarged front view of the main parts of the present invention (at the time of unloading).

In these figures, on the bottom of chassis 1,
A spindle motor (not shown) equipped with a turntable 2 that holds and rotates the disk is attached, and a slide plate 5 (not shown) that moves up and down a holder 4 into which a disk cartridge 3 is inserted and held is attached to the upper side of the chassis 1. It is biased by a spring in the disk cartridge ejection direction and is slidably attached to the bottom surface of the chassis 1. Then, by pressing the knob 6 attached to the tip of the slide plate 5 and moving the slide plate 5 in the disk cartridge insertion direction, the disk cartridge 3 is removed by an eject mechanism (not shown).
is discharged from the holder 4. Also, holder 4
A plate-shaped lifter 8 is partially fixed to the arm support portion 7 on the upper surface, and the unfixed portion of the lifter 8 supports the supported portion 11 of the arm 10 to which the upper head 9 is attached. There is. moreover,
Adjustment screw 1 is inserted from the top of the non-fixed part of lifter 8.
2 are screwed together and pass through the adjustment screw 12, and the tip 12a of the adjustment screw 12 is in contact with the arm support section 7. Also,
An arm 10 is attached to the carriage 14 to which a lower head 13 which is arranged opposite to the upper head 9 and which reads/writes data to the disk cartridge 3 is attached.
is swingably attached, and the arm 10 is always urged toward the carriage 14 by a load spring 15. Note that the spring 16 biases the holder 4 into the loaded state, and against this biasing force, when the holder 4 is in the unloaded state, a locking means (not shown) closes the slide plate 5.
is locked, maintaining the unloaded state of the holder 4.

Next, the operation of this mechanism will be explained.

When the disk cartridge 3 is inserted into the holder 4, a locking means (not shown) is pressed by the disk cartridge 3 and the slide plate 5 is unlocked at the same time as the insertion is completed. Therefore, the slide plate 5 moves in the direction biased by the spring, and the holder 4 is lowered by the biasing force of the spring 16 into a loaded state, and the discs in the disc cartridge 3 are chucked onto the turntable 2.

On the other hand, the lifter 8 fixed to the upper surface of the holder 4 that lifts the arm 10 against the biasing force of the load spring 15 also descends as the holder 4 descends, so the arm 11 also moves in conjunction with the vertical movement of the holder 4. . Therefore, in parallel with the operation up to chucking, the arm 10 also begins to descend together with the holder 4, and at the same time as chucking is completed, the upper head 9 comes into contact with the disk in the disk cartridge 3 and enters the loaded state.

Conversely, in a loaded disk device, when the knob 6 is pushed in, the slide plate 5 moves against the biasing force of the spring, the holder 4 rises, and the lifter 8 also rises in conjunction with this.
The arm 10 is pushed up and the locking means (not shown) is released when the holder 4 completes raising.
The disk cartridge 3 is ejected and returns to the unloaded state.

By the way, in the present invention, the supported portion 1 of the arm 10
Since the adjustment screw 12 for adjusting the height of this contact position is screwed onto the lifter 8 that abuts on the lifter 1, the adjustment screw 12 adjusts the gap between the holder 4 and the upper head 9 during unloading. It can be adjusted to a constant height regardless of variations in dimensions. Therefore, when the disk cartridge 3 is inserted into the holder 4, the disk cartridge 3 is placed in the upper head 9.
This can prevent the upper head 9 from being damaged or deformed.

Further, according to the present invention, the adjustment screw 12 that adjusts the height of the contact position between the supported part 11 of the arm 10 and the lifter 8 is attached to the lifter 8 on the holder 4 side, not on the arm 10 side. By doing so, the weight of the arm 10 can be reduced, and the adjustment screw 1 can be reduced.
Precise machining of the screw pitch on the mounting side (lifter 8 side) of No. 2 becomes possible.

``Effect of the invention'' As mentioned above, this invention is equipped with a gap adjustment mechanism on the arm support part on the holder side, so the gap adjustment mechanism adjusts the gap between the upper head and the holder to the optimum state during unloading. Therefore, it is possible to avoid contact with the upper head of the disk cartridge when inserting the disk cartridge, and it is possible to prevent damage or abnormal operation of the upper head.
It is also possible to prevent the arm from rising too high and hitting the top cover, preventing the holder from rising to the proper height and deforming the arm.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of a magnetic disk device employing the present invention, Fig. 2 is an enlarged front view of the principal parts of the head loading mechanism of the present invention, and Fig. 3 is an enlarged side view of the principal parts of the conventional head loading mechanism. It is a diagram. 3...Disk cartridge, 4...Holder, 7...Arm support section, 9...Upper head, 1
0...Arm, 11...Supported part, 12...Adjustment screw, 15...Load spring.

Claims (1)

[Scope of utility model registration request] In a head loading mechanism that includes a holder into which a disk cartridge is inserted, an arm to which a head is attached, and a load spring that biases this arm toward the disk cartridge, the holder has a load spring on its upper surface. The arm support part is provided to lift up the supported part of the arm against the biasing force, and the arm support part is provided with a gap adjustment means for varying the gap between the holder and the head when the head is unloaded. A head loading mechanism featuring: