JPH03280278A - Optical head brake device - Google Patents

Abstract

PURPOSE:To simplify the structure of the optical head brake device and to reduce its production cost by constituting the device so that rack engagement is disengaged by a set screw at the time of fixing a driving device to a fixing frame body. CONSTITUTION:An optical head 2 including an actuator is supported so as to be moved along a guide rail 3 and the 1st rack 4 is projected to one side. A brake body 6 having the 2nd rack 5 to be engaged with the rack 4 is rotatably supported by a supporting spindle 7 on the base side. When the fixing hole 10 of a frame body 8 is matched with a clamping hole 11 of a fixing frame body 9 and a set screw 12 is screwed into the holes 10, 11, the driving device including the frame body 8 is fixed on the frame body 9. When the screw 12 is screwed into the hole 10, the power part of a brake body 6 is pressed by the head of the screw 6, the body 6 is rotated around the spindle 7 in an arrow A direction, the racks 4, 5 are disengaged from each other, the head 2 is released from the rack 5 and can be moved in the radius direction of the disk.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used for fixing an optical head in a disk drive device that records and reproduces information by irradiating a disk-shaped recording medium with a laser beam. This invention relates to an optical head brake device.

[Prior Art] Generally, in this type of disk drive device, an optical head, which is a pickup unit, is moved in the radial direction of a disk-shaped recording medium to record and reproduce information. The head is supported movably along the guide rail. Therefore, during transportation, the optical head moves due to inertia and may collide with the base or the yoke of the near motor and be damaged, so a brake mechanism is required to prevent the optical head from moving. It is.

Conventionally, such a brake mechanism uses a set screw method to fix the optical head to the device body using a set screw.
A first rack is provided on one side of the optical head, and a second rack with a length corresponding to the moving distance of the optical head is rotatably supported on the base side to engage both racks. A rack engagement method is used in which the optical head is fixed by mating the optical head. In the latter rack engagement method, in order to disengage the first and second racks, the brake body is rotated using a plunger or the like that cycles the power on and off.

[Problem to be Solved by the Invention] However, with the former set screw type, if you forget to remove the set screw, the optical head cannot move and information such as audio and video cannot be recorded or reproduced, resulting in a malfunction. There is a risk of being misidentified. In addition, the latter rack engagement type generally uses a plunger to disengage both racks, which complicates the structure of the rack, increases cost (and consumes extra power). It has disadvantages such as being necessary.

An object of the present invention is to provide an optical head having a simple structure in which the rack engagement is automatically released by screwing in the mounting screw that attaches the drive device to the mounting frame in the above-mentioned rack engagement method. Our purpose is to provide brake equipment.

[Means for Solving the Problems] In order to achieve the above object, the optical head brake device according to the present invention performs at least recording, reproduction, and erasing of information by irradiating a disk-shaped recording medium with a laser beam. In a disk drive device that performs either
A first rack is provided on the side of the movable optical head, and the first rack is provided on the side of the movable optical head.
A brake body including a second rack that engages with the first rack is rotatably supported on the base side, and the brake body is rotated by a mounting screw that attaches the drive device to the mounting frame. , the second rack is disengaged.

[Operation] In the optical head brake device having the above configuration, when the drive device is attached to the mounting frame, the first and second racks are rotated by pushing the brake body with the tip of the mounting screw. Release the engagement.

[Example] The present invention will be explained in detail based on illustrated embodiments.

As shown in FIGS. 1 and 2, an optical head 2 including an actuator 1 is movably supported along a guide rail 3, and a first rack 4 is protruded from one side of the optical head 2. As shown in FIGS. Further, on the base side, a brake body 6 including a second rack 5 that engages with the first rack 4 is rotatably supported by a support shaft 7. The second rack 5 has a length corresponding to the moving distance of the optical head 2, and can engage with the first rack 4 no matter where the optical head 2 is located. . Note that 8 is a frame of the drive device main body, 9 is a mounting frame for mounting the drive device, and a mounting hole 10 drilled in the frame 8 and a fixing hole drilled in the mounting frame 9. The drive device including the frame 8 can be attached to the mounting frame 9 by matching the mounting holes 11 and screwing the mounting holes 12 together.

Further, by screwing the mounting screw 12, the brake body 6 is pressed by the tip of the mounting screw 12.

That is, as shown in FIG. 2, the mounting screw 12 is inserted into the mounting hole 1.
0, the lower part of the brake body 6 is pushed by the tip of the mounting screw 12, so the brake body 6
is rotated around the support shaft 7 in six directions indicated by arrows. As a result, the first rack 4 and the second rack 5 are disengaged, and
The optical head 2 is released from the second rack 5 and becomes able to move freely in the radial direction of the disk. In the transportation state, the optical head 2 is securely fixed by rack engagement, but it becomes free only when the mounting screw 12 is screwed into the installation state.

In the illustrated embodiment, the mounting screws 12 are screwed into both the side and bottom sides of the frame 8, but depending on the mounting method, it may be sufficient to screw in only one side, and the mounting screws 12 may be screwed into both the side and bottom sides of the frame 8. 1o, the position of the fixing hole 11, the shape of the brake body 6, the length of the mounting screw 12, etc. can be appropriately selected.

[Effects of the Invention] As explained above, the optical head braking device according to the present invention has the advantage that the optical head, which is securely fixed by rack engagement during transport or conveyance, is fixed when the drive device is attached to the mounting frame. It is possible to automatically release the rack engagement using this mounting screw. Furthermore, since the conventional plunger is no longer necessary, the structure is simplified and the cost can be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the optical head brake device according to the present invention, with FIG. 1 being an exploded perspective view, and FIG. 2 being a perspective view of the device in use. 1 is the actuator, 2 is the optical head, 3 is the guide rail, 4 is the first rack, 5 is the second rack, 6 is the brake body, 7 is the support shaft, 8 is the frame of the drive device, 9 is the mounting 10 is a mounting hole, 11 is a fixing hole, and 12 is a mounting screw.

Claims (1)

[Claims] 1. In a disk drive device that performs at least one of recording, reproducing, and erasing information by irradiating a disk-shaped recording medium with a laser beam, a first rack is provided on the side of a movable optical head; Second rack engaging
A brake body equipped with a rack is rotatably supported on the base side, and the brake body is rotated by a mounting screw that attaches the drive device to the mounting frame to engage the first and second racks. An optical head brake device characterized by releasing the.