JPS639082A - Damper lock device - Google Patents

Abstract

PURPOSE:To shorten centering time by fitting a gear on the vicinity of a damper preventing the transient vibration of a magnetic head, which occurs when a motor stops, and providing a brake claw locking the gear due to the attraction and release of a solenoid. CONSTITUTION:Since the solenoid 11 attracts a brake plate 11 while a disk device is used, the brake claw is separate from the gear 4 against the energizing force of a spring 13, and the rotational lock of the damper 3 is released. At that time, a rotational shaft 4 rotates due to the rotation of a motor 2, and a magnetic head moves on the desired track of a disk. After a data signal is recorded or reproduced, the rotation of the motor 2 stops. While the motor 2 stops, the inertia moment of the damper 3 rotates and brakes the head, and the transient vibration of a carriage 8 comes to an end in a short time. Thus the centering time is shortened, and a quick access is attainable.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a fixed disk device for recording and reproducing signals;
The present invention relates to a damper lock device used in disk devices such as floppy disk devices and optical disk devices.

2. Description of the Related Art In conventional disk drives, a damper is attached to the rotating shaft of a motor in order to shorten the time it takes for a magnetic head to stabilize after moving on a track (Setting time). Additionally, this disk device was equipped with a carriage lock mechanism or a swing arm lock mechanism for impact resistance.

Problems to be Solved by the Invention However, in the above-mentioned conventional disk device, the damper and the locking mechanism for the carriage or swing arm are separate parts, which takes up a large amount of space, increases stress, and increases the load on the motor. There was a problem.

The present invention solves these conventional problems,
It is an object of the present invention to provide an excellent damper lock device that requires a small space, is low cost, does not significantly increase the load on a motor, and can shorten settling time and improve impact resistance.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention installs a gear around a damper that prevents the transient vibration of the magnetic head that occurs when the motor stops. The structure is such that a locking brake pawl is provided.

Effects The present invention has the following effects due to the above configuration. That is, transient vibrations after the carriage or swing arm is positioned at the target cylinder by the motor can be quickly damped by the damper, thereby shortening the settling time. In addition, when the carriage or swing arm is not in operation, the locking mechanism of the carriage or swing arm is activated.
High impact resistance can be achieved without causing errors or damaging the head or media even when a large impact acceleration is applied.

Embodiment FIG. 1 is a front view of a damper lock device according to an embodiment of the present invention, FIG. 2 is an enlarged view of the main part (part A) of FIG. 1, FIG. 3 is a perspective view of the same embodiment, and FIG. The figure is a top view of the same embodiment.
The figure is a front view of a disk device using the same embodiment, and FIG. 6 is a top view of FIG. 5.

In Figures 1 to 6, 1 is the housing of the disk device, 2
A stepping motor 3 is attached to the housing 1 and moves the magnetic head onto a desired track on the disk.
is a damper whose center is connected to the motor 2 via a rotating shaft 5, and this damper 3 brakes the rotation of the motor 2 by its own moment of inertia. 4 is a carriage lock gear attached to the damper 3. 6
The rotational movement of the motor 2 is transferred to the carriage 8 via the rotating shaft 5.
7 is a magnetic head attached to the tip of a carriage 8, and this magnetic head 7 magnetically records and reproduces electric signals by contacting the rotating disk. Reference numeral 9 denotes a guide shaft attached to the housing 1, along which a ball bearing 10 attached to the carriage slides. 11 is a solenoid, and this solenoid 11 resists the biasing force of the spring 13 and absorbs the brake plate 14. Reference numeral 12 denotes a brake/drive pawl having an L-shaped pawl, and this brake pawl 12 rotates together with the brake plate 14, and the solid line 12 in FIG.
a, meshes with the teeth of gear 4 as shown in 14a, and damper 3
This is to stop the rotation of.

Next, the operation of this embodiment will be explained.

1 to 6, when the disk device is in use, the solenoid n attracts the brake plate 14, so the brake pawl 12 is separated from the gear 4 against the urging force of the spring 13, and the damper 3 The rotation lock is released. At this time, the rotation of the motor 3 rotates the rotating shaft 5, which is converted into horizontal movement by the steel belt 6, and the horizontal movement of the carriage 8 moves the magnetic head 7 onto a desired track on the disk to record the data signal. After the regeneration is completed, the motor 3 stops rotating.

When the motor 2 is stopped, its rotation is braked by the moment of inertia of the damper 3, and transient vibrations of the carriage 8 subside in a short time. Further, when the motor 2 is stopped, the solenoid 110 is de-energized, and the brake pawl 12 is engaged with the gear 4 by the biasing force of the spring 13, and is locked to the gear 4 like the brake pawl 12a in FIG. . In this way damper 3
is locked by the brake pawl 12, so the motor 2 and rotating shaft 50 no longer rotate, and the horizontal movement of the carriage 8 and magnetic head 7 is also locked.

In this way, in this embodiment, if the damper 3 acts, the transient vibrations of the carriage 8 subside in a short time, shortening the settling time and enabling high-speed access. Additionally, when the motor is in use, the magnetic head is locked by the brake pawl, improving impact resistance.

Effects of the Invention As is clear from the above embodiments, the present invention has a gear mounted around a damper that prevents the transient vibration of the magnetic head that occurs when the motor is stopped, and a brake pawl that locks onto this gear by suction and release of a solenoid. By providing such a configuration, it is possible to both shorten settling time and improve impact resistance, and also to have the effect of realizing a small space, low cost, and light motor load.

[Brief explanation of the drawing]

Fig. 1 is a front view of a damper lock device according to an embodiment of the present invention, Fig. 2 is an enlarged view of the main part of Fig. 1, Fig. 3 is a perspective view of the embodiment, and Fig. 4 is a diagram of the same embodiment. 5 is a front view of a disk device using the same embodiment, and FIG. 6 is a top view of FIG. 5. 1... Housing, 2... Motor, 3... Damper, 4
... Gear, 5 ... Rotating shaft, 11 ... Solenoid,
12...Brake claw, 13...Spring, 14...Brake plate. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
@Figure 3 Figure 4

Claims (1)

[Claims] A stepping motor moves the magnetic head onto a desired track on the disk via a steel belt that converts rotational motion into horizontal motion.The stepping motor is attached to the rotating shaft of this stepping motor and uses its own moment of inertia to move the magnetic head to a desired track on the disk when the motor stops. a damper that reduces transient vibrations in the damper; a gear mounted on the circumference of the damper; and a brake pawl that rotates so that an L-shaped pawl engages the gear and locks rotation of the damper. The brake pawl is provided with a spring that biases the brake pawl to lock onto the gear, and a solenoid that magnetically attracts the brake pawl against the biasing force of the spring, and the solenoid applies the brake pawl while the motor is rotating. The damper lock device is characterized in that when the motor is stopped, the attraction of the solenoid is released and the movement of the damper and the magnetic head is locked by the biasing force of the spring.