JPH0617223Y2 - Headlock device in magnetic disk drive device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a device for locking a head carriage when a magnetic disk is not inserted.

[Conventional technology]

A conventional head lock device of a double-sided magnetic disk drive device has a structure as shown in FIG.

The configuration and operation of FIG. 1 will be described below.

In the figure, 1 is a cam 3 for clamping in the A direction via a shaft 2.
Is a clamp lever that locks a magnetic disk (not shown) in the apparatus by rotating the carrier 4 about the shaft 6 as a center. The carrier 4 is biased in the D direction by a coil spring (not shown). An arm 7 is connected to the upper head carriage 8 and is in contact with the head carriage lifting lifter 5 and the lifter 9.

The lifter 5 is provided on the carrier 4, the lifter 9 is in contact with the magnetic disk detection cam 10 and the lifter 5, and is biased in the E direction by a coil spring (not shown).

The magnetic disk detection cam 10 is supported by a shaft 11 and is biased in the G direction by a coil spring (not shown).

Reference numeral 12 is a slider for discharging a magnetic disk, and a coil spring 1
The magnetic disk (not shown) is urged in the I direction by means of 3, and is moved in the H direction by inserting the magnetic disk (not shown) in the H direction of the apparatus and pushing the engaging portion 12a. When the clamp lever 1 is rotated to release the lock, the spring 13 pushes the magnetic disk in the I direction.

Now, when the magnetic disk is inserted into the device in the H direction, the slider 12 moves in the H direction against the spring 13, and the magnetic disk detection cam 10 also resists the bias of the coil spring (not shown) to move the shaft. It rotates in the F direction with 11 as the center of rotation.

When the clamp lever 1 is rotated in the A direction in this state, the carrier 4 and the lifter 5 are rotated by the rotation of the clamp cam 3.
Moves in the C direction (downward), and the lifter 9 urged in the C direction by a coil spring (not shown) moves in the C direction while keeping contact with the lifter and contacts the lifters 5, 9. The moving arm 7 and the upper magnetic head carriage 8 to which the arm 7 is connected also move in the C direction. By this operation, the lower magnetic head 14 and the upper magnetic head come into contact with the magnetic disk, and recording / reproducing on / from the magnetic disk becomes possible.

Next, when the clamp lever 1 is rotated without inserting the magnetic disk into the apparatus, the clamp cam 3 pushes down the carrier 4 and the lifter 5 in the C direction, but the magnetic disk detection cam 10 contacts the lifter 9. Therefore, it cannot move in the C direction despite the biasing of the coil spring (not shown). Therefore, since the arm 7 in contact with the lifter 9 cannot move in the C direction, the upper head carriage 8 to which the arm is coupled cannot move in the C direction either. This prevents the lower head 14 and the upper head (not shown) from contacting each other.

[Problems to be solved by the invention]

However, in the above-mentioned conventional structure, the number of parts such as the magnetic disk detection cam 10, the detection cam shaft 11, the detection cam biasing coil spring, and the lifter 9 is large and complicated.

Therefore, the present invention seeks to provide a head lock device that can be simply configured with a small number of parts.

[Means for solving problems]

The present invention has been made to solve the above problems, and in a magnetic disk drive device including a carrier driven by a clamp cam, a head carriage lifting lifter, and a magnetic disk ejection slider, A structure in which a protrusion is provided on the slider, and an engaging portion that disengages from the protrusion when a magnetic disk is inserted into the lifter is provided, and the lifter is pressed through a leaf spring provided on the carrier. It was done.

〔Example〕

FIG. 2 shows an embodiment of the present invention, in which 1 is a clamp lever for clamping the magnetic disk after inserting it into the apparatus, 2 is a shaft rotatably supported by a bearing 16, and 3 is a clamp. It is connected to the shaft 2 by a cam.

4 is a carrier engaging with the clamp cam 3, and is a shaft 6
Is supported as a center of rotation and is biased in the D direction by a coil spring (not shown).

Reference numeral 17 is a leaf spring coupled to the carrier 4 ', 5'is a lifter supported around the shaft 6 as a center of rotation and having an engaging portion 5a'. It is energized.

Reference numeral 7 denotes an arm provided on the upper head carriage 8, and reference numeral 12 'denotes a slider for ejecting the magnetic disk, which moves in the H direction when the magnetic disk is inserted and is biased in the I direction by the coil spring 13. The slider 12 'has an integrally formed protrusion 12b', and this protrusion 12'b is in a position facing the engaging portion 5a 'when the magnetic disk is not inserted.

Reference numeral 14 is a magnetic head attached to the lower head carriage 15, and 18 is a magnetic head attached to the upper head carriage. (Figs. 3 and 4)
The upper head carriage 8 is biased in the C direction by a spring (not shown).

Next, the operation of the apparatus of the above embodiment will be described with reference to FIGS. 3 and 4.

Now, when the magnetic disk 19 is inserted into the device, the slider 12 'moves in the H direction against the bias of the coil spring 13. At this time, the projection 12'b is disengaged from the engaging portion 5a 'of the lifter 5'.

When the clamp lever 1 is rotated in the A direction in this state, the clamp cam 3 pushes down the carrier 4, and the leaf spring 17 connected to the carrier 4 pushes down the lifter 5'in the C direction.
Then, the arm 7 engaged with the lifter 5'moves in the direction C together with the head carriage 8 connected thereto, and the magnetic heads 14 and 15 come into contact with the magnetic disk 19 to enable signal recording / reproduction. Next, when the clamp lever 1 is rotated without the magnetic disk 19 being inserted, the clamp cam 3 pushes down the carrier 4 and the leaf spring 17 tries to push down the lifter 5 '. The protrusion 12'b of the slider 12 'on the lower surface serves as a stopper to prevent the lifter from moving in the C direction. At this time, the amount of movement of the carrier 5 is absorbed by the amount of deflection of the leaf spring 17, and the leaf spring 17 is deflected as shown in FIG. The carriage 8 cannot move in the C direction, and the magnetic heads 14 and 18 can be prevented from contacting each other.

[Effect of device]

As described above, according to the present invention, it is possible to provide the head lock device having the same function as the conventional one with fewer components than the conventional one.

[Brief description of drawings]

FIG. 1 is a perspective view of a conventional device, FIG. 2 is a perspective view of an embodiment of the present invention, and FIGS. 3 and 4 are operation explanatory views of the embodiment device. 1 ... Clamping lever 2 ... Shaft 3 ... Clamping cam 4,4 '... Carrier 5,5' ... Lifter 6 ... Shaft 7 ... Arm 8 ... Top head carriage 9 ... Lifter 10 ...... Cam for detecting magnetic disk 11 ...... Axis 12, 12 '...... Slider for discharging magnetic disk 13 ...... Coil spring 14 ...... Magnetic head 15 ...... Bottom head carriage 16 ...... Bearing 17 ...... Leaf spring 18 ...... Magnetic head 19 ... Magnetic disk

Claims (1)

[Scope of utility model registration request] 1. A carrier driven by a clamp cam,
In a magnetic disk drive device including a lifter for lifting a head carriage and a slider for ejecting a magnetic disk, a slider is provided with a projection, and when the magnetic disk is inserted into the lifter, the engagement with the projection is released. A head lock device in a magnetic disk drive device, wherein a joint portion is provided and a lifter is pressed via a leaf spring provided on the carrier.