JPH0656703B2 - Magnetic head device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a magnetic head device, and more particularly to a magnetic head device that prevents contact failure between a magnetic head and a flexible recording medium and prevents wear and damage of both. The present invention relates to a head device.

[Prior art]

Conventionally, there is known a magnetic head device in which a magnetic head is brought into close contact with a flexible magnetic recording medium.

FIG. 1 shows a magnetic head device according to the prior art. In the figure,
Reference numeral 1 denotes a flexible magnetic recording medium. The recording medium 1 is attached to a rotary shaft 2 which is rotationally driven by a rotary drive source (not shown), and rotates in the direction of arrow A. Reference numeral 3 denotes a magnetic head for recording / reproducing data while contacting the recording medium 1, and the magnetic head 3 is supported by the tip of a fixed support arm 4. Here, the contact surface of the magnetic head 3 with the recording medium 1 is a convex spherical surface 3A.

Reference numeral 5 denotes a support arm rotatably attached to the base end side of the fixed support arm 4, and a pressure pad 6 made of a soft material such as felt is attached to the tip end of the support arm 5. Reference numeral 7 denotes a tension spring stretched between the fixed support arm 4 and the support arm 5, and the pressure pad 6 presses the recording medium 1 toward the magnetic head 3 by the tension spring 7 to cause the magnetic head 3 to move. It is designed to be in intimate contact with 3.

Thus, in the magnetic head device according to the prior art configured as described above, the pressure pad 6 presses the recording medium 1 toward the magnetic head 3 side by the spring force of the tension spring 7, but at this time, the pressure pad is pressed. Since 6 is made of soft material,
The flexible recording medium 1 elastically deforms along the convex curved surface 3A of the magnetic head 3 and comes into close contact with it. In this state, the magnetic head 3 executes recording / reproducing of data on / from the recording medium 1.

However, such a conventional magnetic head device has the following drawbacks.

When the recording medium 1 has a waviness, the waviness changes the contact point between the magnetic head 3 and the recording medium 1, and the recording / reproducing characteristics become unstable.

In order to stabilize the contact between the magnetic head 3 and the recording medium 1, it is necessary to increase the pressure applied to the pressure pad 6, but in this case, the magnetic head 3 and the recording medium 1 are worn or damaged. There are drawbacks.

Since the pressure pad 6 is made of felt or the like, dust or abrasion powder accumulated between the felt bristles damages the recording medium 1, and in order to prevent this, the felt must be replaced at any time. It was inconvenient.

Further, Japanese Patent Laid-Open No. 58-35764 discloses another conventional example of a magnetic head device.

Such a conventional example relates to a perpendicular magnetization recording device provided with a main magnetic pole and an auxiliary magnetic pole, which is characterized in that a recording medium is provided on the side opposite to the main magnetic pole as a supporting member so as to surround the main magnetic pole. A pressure pad is provided, and the pressure pad presses the recording medium around the main pole toward the main pole. According to this structure, the recording medium is pressed against the magnetic head by the pressure applied to the pressure pad, so that even if the recording medium has undulations, both can be brought into close contact with each other.

However, in the case of this conventional example, since the recording medium is pressed against the main magnetic pole by the pressure applied to the pressure pad, there is a drawback that the recording medium and the main magnetic pole are worn or damaged due to the friction between them. ing.

[Outline of device]

The present invention has been made in view of the above-mentioned drawbacks of the prior art,
A magnetic head for recording or reproducing data while being pressed against the surface side of the flexible magnetic recording medium, and the magnetic head provided independently of the magnetic head to extend the flexible magnetic recording medium. A supporting member provided on the side opposite to the magnetic head so as to straddle the magnetic head, a receiving member provided on the magnetic head side so as to face the supporting member, and further, these supporting member and the receiving member are independently provided. , A flexible magnetic recording medium and an adjusting mechanism for positioning the flexible magnetic recording medium with respect to the magnetic head, thereby removing the undulations of the recording medium, thereby allowing the magnetic head to come into close contact with the recording medium. To provide.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS. 2 to 4. FIG. 2 shows the first embodiment. The same components as those of the conventional technique are designated by the same reference numerals and the description thereof will be omitted.

Reference numeral 11 denotes a fixed support arm provided parallel to the recording medium 1 so as to be movable in the radial direction (B direction in the figure). A positioning portion 13 having parallel reference surfaces 12 is formed,
Further, the tip portion thereof reaches the lower level of the recording medium 1 and a screw hole 14 orthogonal to the recording medium 1 is formed.

Reference numeral 15 is a magnetic head disposed on the axis of the screw hole 14, and the magnetic head 15 is elastically moved in the axial direction of the screw hole 14 by an elastic body 16 such as a gimbal provided in the screw hole 14. It is supported, and its tip reaches a position where the recording medium 1 is slightly pushed up from below.

Reference numeral 17 denotes a holder attached to the screw hole 14, a magnetic head insertion hole 18 is formed on the axis of the holder 17, and a male screw 19 to be screwed into the screw hole 14 is engraved on the lower peripheral surface. Has been done.

Reference numeral 20 denotes an annular receiving member that is attached to the upper surface of the holder 17 and has a pressing surface 20A. The magnetic head 15 is located on the axis of the receiving member 20, and the pressing surface 20A is a recording medium. 1 faces the lower surface at a slight distance. Here, the receiving member 20 is made of a slidable solid material that is homogeneously isotropic and has a fixed lubricating action, and one example thereof is a polyamide resin containing 40% graphite. Reference numeral 21 denotes a support arm whose base end side is rotatably attached to the base end side of the fixed support arm 11.
A reference surface 22 that abuts the reference surface 12 of the positioning portion 13 when the support arm 21 is parallel to the recording medium 1 is formed at the base end side, and the fixed support arm 11 is provided at the tip end portion thereof. A screw hole 23 facing the screw hole 14 is formed. A holder 24 is screwed into the screw hole 23, and a male screw 25 is engraved on the upper portion of the holder 24.

Reference numeral 26 is an annular support member attached to the lower surface of the holder 24 and having a pressing surface 26A. The magnetic head 15 is located on the axial extension of the supporting member 26, and the pressing surface 26A is It is biased by a tension spring 7 so as to face the upper surface of the recording medium 1 with a slight distance therebetween. Here, the support member 26 is made of a slidable solid material that is homogeneously isotropic and has a solid lubricating action, and one example thereof is a polyamide resin containing 40% graphite.

The magnetic head device according to the present invention is configured as described above, and its operation will be described below.

First, at the time of recording / reproducing data, the recording medium 1 rotates in the direction of arrow A, and accordingly, the recording medium 1 rotates in the direction perpendicular to the paper surface while contacting the magnetic head 15.

At this time, it is assumed that the recording medium 1 has the undulation C shown by the dotted line in the figure. However, in this embodiment, the undulation C is sandwiched between the support member 26 and the receiving member 20 and is corrected as shown by the solid line. Can be in intimate contact.

As described above, in this embodiment, even if the recording medium 1 has the undulations C, the undulations C are contacted with the magnetic head 15 after being removed by the support member 26 and the receiving member 20. The protrusion amount of the magnetic head 15 with respect to the recording medium 1 may be smaller than that disclosed in Japanese Patent Laid-Open No. 58-35764, and therefore, the progress of wear between the recording medium 1 and the magnetic head 15 can be reduced, and as a result, The wear and damage of both can be prevented, and further, since no felt or the like is used as in the prior art shown in FIG. 1, damage due to dust or wear powder can also be prevented. Also, the holder 1
7, the male screw 19 formed in the fixed support arm 11 and the screw hole 14 formed in the tip of the fixed support arm 11 constitute an adjusting mechanism of the receiving member 20, and the male screw 25 formed in the holder 24 and the support arm. An adjusting mechanism for the support member 26 is configured by the screw hole 23 formed at the tip end portion of 21.

Further, the support member 26 and the receiving member 20 are provided independently of the magnetic head 15.

Therefore, the holder 17 is rotated to adjust the position of the receiving member 20 up and down to adjust the protruding length of the head 15 protruding from the pressing surface 20A of the receiving member 20.
By rotating 4 to vertically adjust the position of the support member 26 and adjust the distance to the receiving member 20, adjustment corresponding to the waviness of the recording medium 1 can be performed. In addition, since the adjusting mechanism can move and adjust the members 20, 26 relative to the magnetic head 15 and the position of the magnetic head 15 can be absolutely fixed at a predetermined position, accurate adjustment can be performed.

Further, FIG. 3 shows a second embodiment of the present invention, (a) shows a case where the support member 27 and the receiving member 28 are formed in a rectangular ring shape surrounding the magnetic head 15, and (b) shows the support members 29, 30 and. The case where the receiving members 31 and 32 are formed in a strip shape and the supporting members 29 and 30 and the receiving members 31 and 32 are arranged so as to be orthogonal to the moving direction of the recording medium (D direction in the drawing) is shown. A modified example of the above B is shown, showing a case where the support members 33 and 34 and the receiving members 35 and 36 are arranged parallel to the moving direction of the recording medium (D direction in the drawing).

FIG. 4 shows a third embodiment of the present invention. The feature of this embodiment is that the present invention is applied to a perpendicular magnetization recording apparatus having a main magnetic pole 30 and an auxiliary magnetic pole 38 as a magnetic head. is there.

〔The invention's effect〕

As described above, according to the present invention, by providing the receiving member facing the supporting member on the magnetic head side and passing the recording medium between the supporting member and the receiving member, the undulation of the recording medium can be removed. It is possible to improve the data recording / reproducing characteristics. Further, since the adjusting mechanism is provided, the adjustment can be performed according to the waviness of the recording medium. Further, since the supporting member and the receiving member are provided independently of the magnetic head, the adjusting mechanism allows the receiving member and the supporting member to be moved and adjusted relative to the magnetic head, thereby enabling accurate adjustment.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a magnetic head device according to the prior art,
FIG. 2 is a first diagram showing the configuration of the magnetic head device according to the present invention.
FIG. 3 is a plan view showing the second embodiment, and FIG. 4 is a block diagram showing the third embodiment. 1 ... Flexible magnetic recording medium, 15 ... Magnetic head, 20
...... Receiving member, 26 ...... Supporting member, 37 ...... Magnetic head (main magnetic pole).

Claims (1)

[Claims] 1. A magnetic head that records or reproduces data while being pressed against the surface side of a flexible magnetic recording medium, and the magnetic head is provided independently of the magnetic head. A supporting member that is provided on the side opposite to the magnetic head so as to straddle the magnetic head, and a receiving member that is provided on the magnetic head side so as to face the supporting member, and further, the supporting member and the receiving member. A magnetic head device comprising: a flexible magnetic recording medium and an adjusting mechanism for independently positioning the members with respect to the magnetic head.