JPH03183073A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To effectively suppress the generation of spacing between a head and a recording medium by applying pressure to a sliding surface between them by arranging the pressing point of a supporting part by a pushing member and the central point of a support shaft on a plane parallel to the sliding surface of the recording medium. CONSTITUTION:Pressing point P of an arm 9 supporting a jimbal plate 8 to hold a magnetic head 6 is pushed in a lower D direction by a pushing spring 14. This pushing force is applied to the pressing point P by rotation moment to define OP as a rotational radius with a central point O of a support shaft 13a, which is provided in a supporting member 13 of the spring 14, as a center. The central point O of the support shaft 13b and the pressing point P are ar ranged on a plane R parallel with the sliding surface of a recording medium 5. Thus, the pushing force to be operated to the pressing point P is made perpen dicular to the medium 5 and the pressure, with which the head gets contact with the medium 5, is uniformly applied to the inner peripheral side sliding surface and outer peripheral side sliding surface of the medium 5.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a magnetic recording/reproducing device for magnetically recording or reproducing information using a magnetic recording medium, and in particular, to a magnetic recording/reproducing device for magnetically recording or reproducing information using a magnetic recording medium, and in particular, a magnetic recording/reproducing device for magnetically recording or reproducing information using a magnetic recording medium. This relates to a magnetic recording and reproducing device that magnetically records or reproduces information by pressing the magnetic head and sliding it relative to each other.

[Prior Art] Conventionally, as this type of magnetic recording/reproducing device, there is a flexible disk device (hereinafter referred to as FDD) that magnetically records or reproduces information on a flexible magnetic disk of a magnetic recording medium used as an external storage device of a computer. be. In recent years, FDDs have been rapidly becoming smaller and larger in capacity, and there is a corresponding demand for higher recording density.To achieve this, it is necessary to narrow the width of the magnetic gap of the magnetic head. This is an advantageous method. However, when the gap width is narrowed, a change in 111 [(hereinafter referred to as spacing) between the magnetic recording medium (hereinafter referred to as recording medium) and the magnetic head appears as a large change in the output of the magnetic head. For this reason, the contact state between the magnetic head and the recording medium is important, and it is necessary to stably keep the spacing small. With the above background in mind, FIG. 3 shows an exploded perspective view of a magnetic head support section of a conventional FDD.

In FIG. 3, reference numeral 1 denotes a carriage that is moved in six directions by a drive device (not shown), and a first magnetic head 2 for recording or reproducing that is in sliding contact with the lower surface of a recording medium 5 is mounted on the upper surface of the tip end of the carriage 1. It is held via a support plate 3. A shield ring 4 is provided surrounding the magnetic head 2 to prevent noise from entering the magnetic head 2. Further, on the upper part of the carriage 1, a second magnetic head 6 that comes into sliding contact with the upper surface of the recording medium 5 is surrounded by a shield link 7 that prevents noise from entering.
It is held at the tip of an arm 9 that faces the first magnetic head 2 via a swingable gimbal plate 8 and constitutes a support section. A gimbal plate 8 that holds this magnetic head 6 is attached to a pivot 10 provided at the tip of an arm 9.
Displacement in the upward direction in the figure is restricted by. Furthermore, the arm 9 has one end buried in the rear end of the arm 9,
A leaf spring 12 whose other end is embedded in the support member 13 of the arm 9
Due to the elasticity of the support member 1-3, the support member 1-3 is cantilevered so as to be vertically displaceable.

A press spring 14 is pivotally supported on a support shaft 13a provided on the support member 13, and the tip of the press spring 14 presses the tip of the arm 9 downward from the back surface, that is, in the direction C in the figure. The arm 9 is biased. The rear end 1 of the carriage 1 is then
It is fixed at a. O is the center point of the support shaft 13a that supports the pressure spring 14, and P is the center point of the support shaft 13a that supports the pressure spring 14.
The tip of the arm 9 is a pressing point for pressing the arm 9.

In such a configuration, during recording and reproduction, the pressing spring 14 presses the arm 9 downward in the figure, that is, in the C direction, as described above, and this pressing force presses the magnetic heads 2 and 6 against the recording medium 5. With the recording medium 5 being sandwiched between the magnetic heads 2 and 6, the recording medium 5 is rotated in the direction of arrow B in the figure by a drive device (not shown), and the magnetic heads 2 and 6 come into sliding contact with the recording medium 5 to perform recording or recording. Regeneration takes place. At this time, the magnetic head 2 is connected to an FPC (not shown) via a flexible printed wiring board (hereinafter referred to as FPC) (not shown).
The magnetic head 6 is connected to the recording/reproducing circuit of the DD, while the magnetic head 6 is
It is connected to a recording/reproducing circuit of an FDD (not shown) via PCII, and information signals are transmitted.

In such a conventional configuration, the magnetic heads 2 and 6 are brought into pressure contact with the recording medium 5 by the pressing force of the pressing spring 14, and the magnetic head 6 is supported swingably to follow the movement of the recording medium 5. This suppresses the occurrence of spacing. Then, the support member 13 of the pressing spring 14
A straight line op connecting the center point O of the mounting support shaft 13a and the pressing point P where the tip of the pressing spring 14 presses the arm 9 is inclined with respect to the sliding plane Q of the recording medium 5. Therefore, the pressing spring 14 presses the arm 9 at the pressing point P.
Since the bias applied to is given by a rotational moment with OP as the radius of rotation, the bias applied to the pressing point P is in a diagonal direction inward from the vertical direction, that is, the direction C.

(Problems to be Solved by the Invention) Since the conventional example is configured as described above, as shown in the side view of the magnetic head support part in FIG. On the other hand, the press spring 14 rotates about the center point 0 of the support shaft, and a rotational moment with a radius of OP is applied, that is, in the direction of arrow C in FIG. 4.

This force is transmitted to the sliding contact surface between the magnetic head 6 and the recording medium 5 via the arm 9 and the gimbal plate 8. The contact surface is pressed more strongly than the sliding contact surface on the outer peripheral side of the recording medium 5, that is, on the right side in the figure, resulting in an imbalance in the pressing force.

Because of this imbalance in the pressing force, the recording medium 5
The gimbal plate 8 that is supported so as to follow the
Tracking on the outer circumferential sliding surface of the recording medium 5 deteriorates, causing spacing between the magnetic head 6 and the recording medium 5, and as a result, the recording and reproducing characteristics of the magnetic recording and reproducing device are significantly deteriorated. There was a problem.

In addition, there is an old note that increases the pressing force to suppress the occurrence of spacing for the reasons mentioned above, but in that case, the sliding contact between the recording medium 5 and the magnetic head 6 on the inner circumferential side of the recording medium 5 There is a drawback that the pressing force on the portion becomes abnormally large and there is a risk of damaging the recording medium 5.

This invention was made in order to solve the problems of the conventional example as described above, and the pressing force of the pressing spring against the magnetic head is uniformly applied to the inner circumferential sliding surface and the outer circumferential sliding surface of the recording medium. The object of the present invention is to provide a magnetic recording/reproducing device having such a magnetic head pressing support structure.

[Means to solve the problem]

Therefore, in the magnetic recording and reproducing apparatus according to the present invention, a support part that swingably supports a magnetic head is pressed against a magnetic recording medium by a biasing member, and the magnetic head is pressed against the magnetic recording medium so that the support part swingably supports the magnetic head. In a magnetic recording and reproducing device that magnetically records or reproduces information by sliding the biasing member, the pressing point of the support portion by the biasing member and the center point of the support shaft that pivotally supports the biasing member are connected to the magnetic recording/reproducing device. The above objective is achieved by arranging the media on a plane parallel to the sliding surface of the medium.

[For production]

In the magnetic recording/reproducing device according to the present invention configured as described above, the pressing point by the biasing member of the magnetic head support portion and the center point of the support shaft that pivotally supports the biasing member are aligned with each other on the sliding surface of the recording medium. Since it is placed on a plane parallel to the magnetic head, a pressing force is applied uniformly to the inner and outer sliding surfaces of the magnetic head and the recording medium. , which allows the spacing to remain stable.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

(Structure) FIG. 1 is an exploded perspective view of a magnetic head supporter showing one embodiment of the magnetic recording/reproducing apparatus of the present invention, and FIG. 2 is a side sectional view of the same embodiment.

In the drawings, parts that are the same or equivalent to those of the conventional example are indicated by the same reference numerals.

In FIGS. 1 and 2, reference numeral 13b is a support shaft that supports a pressing spring 14, which is an urging member, on the supporting member 13, and the tip of the pressing spring 14 presses a pressing point P of the arm 9. The center point 0 of this support shaft 13b and the pressing point P of the arm 9 are arranged on a plane R parallel to the sliding surface of the recording medium 5. It goes without saying that parallel here does not mean geometric parallelism, but parallelism that is possible in terms of processing accuracy.

(Operation) In FIG. 2, a pressing point P of the arm 9 supporting the gimbal plate 8 holding the magnetic head 6 is biased downward in the figure, that is, in the D direction, by the pressing spring 14. This bias is applied to the pressing point P by the pressing spring 14 by a rotational moment about the center point 0 of the support shaft 13b provided on the support member 13 that supports the pressing spring 14 and having a rotation radius of OP. Since the center point O of the support shaft 13b and the pressing point P are arranged on the plane R parallel to the sliding surface of the recording medium 5, the urging force acting on the pressing point P is perpendicular to the recording medium 5. Therefore, the pressing force for pressing the magnetic head 6 against the recording medium 5 is uniformly applied to the inner circumferential sliding surface and the outer circumferential sliding surface of the recording medium 5. Therefore, the tracking between the recording medium 5 and the magnetic heads 2 and 6 is performed well, thereby suppressing the occurrence of spacing. As a result, the output characteristics of the magnetic head are improved and stabilized, and magnetic recording and reproduction can be performed efficiently and stably.

〔Effect of the invention〕

As described above, according to the present invention, the support part that swingably supports the magnetic head is pressed against the recording medium by the urging member, and the pressing point of the support part by the urging member and the urging member Since the center point of the supporting shaft that supports the magnetic head is placed on a plane parallel to the sliding surface of the recording medium, the pressing force applied to the pressing point is applied in a direction perpendicular to the sliding surface of the recording medium, and the magnetic head and recording A pressing force is uniformly applied to the two sliding surfaces of the medium, and as a result, it is possible to effectively suppress the occurrence of subbase sink between the magnetic head and the recording medium. As a result, the output characteristics of the magnetic head can be improved and stabilized, and magnetic recording and reproduction can be performed efficiently, favorably, and stably. Further, since the pressing force is uniformly applied, there is no need to apply an excessive pressing force to the magnetic head, and excellent effects such as being able to prevent damage to the recording medium can be achieved.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a magnetic head support part of a magnetic recording and reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a side sectional view of the magnetic head support part, and FIG. 3 is a conventional magnetic head. FIG. 4 is an exploded perspective view showing the support part and a side view thereof. 2.6--Magnetic head 5...Magnetic recording medium 9--Arm 13 b--Spindle 14...Press spring O. ... Center point p of the support shaft --- Pressing point Q. In the R-m plane, the middle or equivalent portions in each figure are indicated by the same reference numerals.

Claims (1)

[Claims] A support part that swingably supports a magnetic head is pressed against a magnetic recording medium by a biasing member, and the magnetic head is pressed against the magnetic recording medium and slid relative to the magnetic recording medium to magnetically record or reproduce information. In the magnetic recording/reproducing device, a point at which the support member is pressed by the biasing member and a center point of a support shaft that pivotally supports the biasing member are arranged on a plane parallel to a sliding surface of the magnetic recording medium. A magnetic recording/reproducing device characterized by: