JPH0616349B2 - Loading mechanism of magnetic head - Google Patents

Description

TECHNICAL FIELD The present invention relates to a magnetic head loading mechanism suitable for a magnetic disk inspection apparatus or the like.

<< Prior Art >> Normally, a loading mechanism of a magnetic head used in a magnetic disk inspection apparatus or the like loads and unloads the magnetic head 1 onto the disk surface of the magnetic disk M, as shown in FIG. On the other hand, in the type in which the flexure portion 2 holding the magnetic head 1 has an inclination, the arm 3 moves forward and backward in the direction of the arrow in FIG. 4, and the flexure portion 2 is moved up and down to move the magnetic head 1. Loading or unloading is performed on the disk surface of the magnetic disk M.

However, the tip of the arm 3 and the flexure portion 2 of the magnetic head 1 rub against each other, and metal-to-metal contact causes abrasion powder of the metal, causing so-called contamination.

In particular, in magnetic disk inspection equipment that is mainly used in a clean environment such as a clean room, contamination causes damage to the magnetic disk or magnetic head, so avoid this contamination as much as possible. This is a problem that must be addressed.

Further, the magnetic head 4 of the type shown in FIG. 5 cannot be applied with this loading mechanism because the head flexure portion 5 is in a horizontal state. Therefore, it is the actual situation that the application target of the above-mentioned loading mechanism is largely limited.

<< Problems to be Solved by the Invention >> The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to prevent the occurrence of contamination at all, and particularly to clean a clean room or the like. It is an object of the present invention to provide a magnetic head loading mechanism that is suitable for the environment and that can be widely applied to various magnetic heads of different types, and that has a very high practical value.

<< Means for Solving the Problems >> An eccentric cam fixed to an output shaft of a motor, a roller that abuts a peripheral edge of the eccentric cam, a link urged by an elastic member in an abutting direction, and A loading mechanism composed of an arm fixed to the tip of the link and moving the magnetic head up and down, and a carriage slidable by a drive device.
A magnetic head is provided so as to interlock with sliding of the carriage, and a fulcrum is provided on the link at an intermediate portion between a link tip end portion to which the arm is fixed and a portion where the eccentric cam abuts. The magnetic head is movable on the surface of the magnetic disk, and the link pivoting about the fulcrum is moved up and down by the rotating operation of the eccentric cam to move the arm up and down to load the magnetic head on the surface of the magnetic disk. It is characterized in that it is designed to be unloaded.

<< Operation >> According to the above configuration, the eccentric cam is rotated by the rotation of the motor, and the link is swung by the rotation of the eccentric cam. Since the magnetic head is loaded or unloaded on the disk surface, the parts are not rubbed with each other unlike the conventional loading mechanism, and no contamination occurs.

Further, as described above, since the magnetic head is moved up and down by the swinging motion of the link, it can be applied to both sides even if the flexure portion of the magnetic head is inclined or in a horizontal state. It can be applied to a wide range of types of magnetic heads.

<< Description of Embodiments >> An embodiment in which the loading mechanism for a magnetic head according to the present invention is applied to a magnetic disk inspection apparatus will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an explanatory view showing the configuration of a loading mechanism of a magnetic head according to the present invention, FIG. 2 is a sectional view of the loading mechanism, and FIG. 3 is a plan view of the loading mechanism.

In the drawings, reference numeral 10 in the drawing denotes a carriage provided on a table 11 so as to be slidable in the front-back direction by a drive mechanism (not shown). It is provided so as to be located on the lower surface.

The magnetic heads 12 and 13 are respectively biased in the loading direction. Further, in the inspection apparatus shown in this embodiment, a pair of upper and lower magnetic heads are provided on the left and right sides, and a total of four magnetic heads are provided. A magnetic head is used for the measurement.

In FIG. 1, the carriage 10 slides on the table 11 toward the magnetic disk M by a drive mechanism (not shown) and stops at a predetermined position, and the magnetic heads 12 and 13 load the disk surface of the magnetic disk M, respectively. It shows the state.

Next, the configuration of the loading mechanism of the magnetic heads 12 and 13 will be described.

Note that the loading mechanism of the magnetic head 12 loaded on the upper surface of the magnetic disk M will be described for convenience, but the basic configuration of the loading mechanism of the magnetic head 13 loaded on the lower surface of the magnetic disk M is the same, and is only vertically symmetrical. Nothing.

That is, the loading mechanism of the magnetic head 12 supports the lower side of the flexure portion 14 of the magnetic head 12, and moves the magnetic head 12 up and down. A link 17 supported so as to be rotatable around a fulcrum 16.
A roller bearing 18 fixed to the rear end side of the link 17, an eccentric cam 19 that contacts the roller bearing 18, and a rear end side of the link 17, that is, the roller bearing 18 to the contact side of the eccentric cam plate 19. It is composed of a tension coil spring 20 for urging.

Although not shown in FIG. 1, as shown in FIGS. 2 and 3, the eccentric cam plate 19 has a stepping motor 21.
Is connected to the output shaft 21a of the eccentric cam 21. The rotation of the stepping motor 21 causes the eccentric cam 19 to rotate intermittently.

Next, the operation of the loading mechanism of this embodiment will be described.

FIG. 1 shows the magnetic head 12 in the loading state. In this loading state, the cam center 19a of the eccentric cam 19 and the contact point between the cam 19 and the roller bearing 18 are shown. The distance l is the maximum. Then, in order to shift from the loading state to the unloading state, first, the stepping motor 21
Rotates.

The rotation of the eccentric cam 19 causes the distance 1 to gradually decrease, and accordingly, the roller bearing 18 is pulled downward by the spring force of the tension coil spring 20.

Then, since the link 17 pivots in the clockwise direction in FIG. 1 around the fulcrum 16, the arm 15 fixed to the tip of the link 17 rises to lift the magnetic head 12, and the arm of the magnetic head 12 is lifted. Do loading.

Next, in order to shift the magnetic head 12 from the unloading state to the loading state, the reverse operation described above may be performed. That is, the eccentric cam 19 is rotated by the rotation of the stepping motor 21, and the cam center 19a of the cam 19 is rotated.
The rotation of the eccentric cam 19 stops at a point where the distance 1 from the contact point with the roller bearing 18 becomes maximum, and the roller bearing 18 against the spring force of the tension coil spring 20.
Is pushed upward, the link 17 pivots counterclockwise in FIG. 1, the arm 15 attached to the tip of the link 17 swings downward, and the alexer portion 14 is urged downward in the loading direction. The magnetic head 1
2 will be loaded.

Since the loading / unloading mechanism of the magnetic head 13 is only vertically symmetrical with the magnetic head 12,
The detailed description is omitted here.

Further, as shown in FIG. 3, in this inspection device,
A pair of upper and lower magnetic heads are arranged on the left and right sides, respectively. Therefore, the above-mentioned loading mechanisms are set on the left and right sides, respectively.

<< Effects >> As described above, according to the magnetic head loading mechanism of the present invention, the eccentric cam driven by the rotation of the motor causes the link to pivot, and the arm provided at the tip of the link moves up and down. Since it is to load and unload the head,
Unlike the conventional magnetic head loading mechanism, the flexure part and the arm do not rub against each other, so that no contamination occurs, and it is especially used for a magnetic disk inspection device used in a clean environment such as a clean room. It is suitable for a magnetic head loading mechanism and has the advantage of significantly improving the reliability of the apparatus.

Further, since the loading mechanism of the magnetic head according to the present invention can be widely used for various types of magnetic heads regardless of the shape of the flexure portion of the magnetic head, it has a very wide range of application and high practical value. is there.

[Brief description of drawings]

1 is an explanatory view showing the structure of a loading mechanism of a magnetic head according to the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1,
FIG. 3 is a plan view showing the same loading mechanism, FIG. 4 is an explanatory view showing a conventional example of a conventional magnetic head loading mechanism, and FIG. 5 is a plan view showing a separate type magnetic head. 10 ... Carriage 11 ... Table 12, 13 ... Magnetic head 14 ... Flexure part 15 ... Arm 16 ... Support point 17 ... Link 18 ... Roller bearing 19 ... Eccentric cam 20 ... Tension coil spring 21 ... Stepping motor

Claims (1)

[Claims] 1. An eccentric cam fixed to an output shaft of a motor,
A roller that abuts the peripheral edge of the eccentric cam, a link that is biased by an elastic member in the abutting direction, an arm that is fixed to the tip of the link and that moves the magnetic head up and down, and a carriage that is slidable by a drive device. The magnetic head is provided so as to interlock with the sliding of the carriage, and the link has a link tip portion to which the arm is fixed and a portion where the eccentric cam abuts. A fulcrum is provided in the middle part, the magnetic head is movable on the surface of the magnetic disk, and the link pivoted around the fulcrum by the rotating operation of the eccentric cam moves the arm up and down. A magnetic head loader characterized by loading or unloading a magnetic head on the surface of a magnetic disk. Mechanism.