JPH0363979A - Recording and reproducing device and adjusting method for the same - Google Patents

Abstract

PURPOSE:To obtain a recording and reproducing device, for which the performance of vibration resistance and impulse resistance is extremely improved, assembly and adjustment are made easy and productivity is improved, by adjusting one or both head slider units to media by a posture adjusting screw. CONSTITUTION:A posture adjusting board 16 is coupled to both a carriage 19 and an arm 20 or to one of them by plural posture adjusting screws 17 so as to be vertically adjusted. Then, an elastic force generating means 18 is provided to energize the posture adjusting board 16 in a direction where the posture adjusting board is abutted to the posture adjusting screws. Between heads 14 and 15 and a medium 1 in a head slider supported by the carriage 19 and arm 20, interface is enough satisfactorily guaranteed and an elastic force generating means 18 with strong energizing force is used. Thus, the recording and reproducing device is extremely resistant against vibration or impulse as disturbance and the input/output miss of a signal such as drop-out, etc., can be prevented. Then, a satisfactory recording and reproducing property can be stably secured. Further, by adjustment with the posture adjusting screws 17 or the adjustment of a rotating block, these units can be extremely rationally and easily assembled and adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a recording/reproducing apparatus using a disc-shaped recording medium (hereinafter referred to as the "media") made of a flexible body, and a method for adjusting the same.

2. Description of the Related Art A disk drive device for a floppy disk in the field of magnetic recording and reproducing technology will be explained as an example. The configuration shown in FIG. 5 is a typical means for magnetically recording and reproducing signals on both sides of a conventional medium. That is, a pair of head sliders 2 and 3 are disposed at opposite positions so as to sandwich the media l rotating at a constant speed with a predetermined contact force from both sides, and each head slider 2, The heads 4 and 5 embedded in 3 slide into contact with the media 1,
It records and plays magnetically.

The head slider 2.3 encloses the heads 4 and 5, which are generally made of a ferrite material or the like, rather than ceramic, and has a smooth surface that slides in contact with the media 1. Furthermore, in order to ensure sufficient contact between the head sliders 2 and 3 including the heads 4 and 5 against the media l,
One head slider (upper side in FIG. 5) is provided with a spring 6 called a gimbal for attitude adjustment.

Problems to be Solved by the Invention In the above conventional configuration, for example, when the media 1 causes vertical vibration due to rotation, or when the disk drive device itself is used under a predetermined vibration and shock environment, the spring If the limit of the posture holding force of 6 is exceeded, the upper and lower head sliders 2 and 3 will jump due to the resonance of the spring system, resulting in signal recording/reproducing errors (dropouts, etc.). In particular, in order to effectively adjust the posture of the head slider 3 in accordance with the vertical movement of the media 1, it is necessary to design the stiffness of the spring 6 to be approximately equivalent to the rigidity of the media 1. The situation is extremely inadequate from the perspective of improving vibration/impact performance.

The above trends are becoming increasingly important for recording and reproducing devices to meet the demands for narrower track pitches associated with higher recording densities and basic improvements in vibration/impact performance associated with portability. It has come to be positioned.

In view of the above problems, it is an object of the present invention to provide a recording and reproducing device that optimizes the contact between the head sliders and the media, has excellent vibration/shock resistance, and is compatible with high density and portability, and a method for adjusting the same. purpose.

Means for Solving the Problems In order to achieve the above object, the recording and reproducing apparatus of the present invention includes:
It consists of a substantially flat carriage, a substantially flat arm held substantially parallel to the carriage at a constant interval, and at least a pair of upper and lower substantially rectangular parallelepiped blocks holding heads for inputting and outputting signals, and It consists of a head slider that is connected to each arm and holds the recording medium under a predetermined contact pressure, and a thin plate-like member to which the head slider is fixed. The present invention is characterized in that it includes an attitude adjustment plate that is coupled to the attitude adjustment plate so as to be adjustable up and down, and an elastic force generating means that biases the attitude adjustment plate in a direction in which it comes into contact with the attitude adjustment screw.

Effect: With the above-mentioned configuration, the interface between the head and the media in the head slider supported by the carriage and the arm is sufficiently broken down, and by using an elastic generating means with a strong biasing force, vibrations and shocks as disturbances are suppressed. This makes it possible to avoid signal input/output errors such as dropouts, and ensure excellent recording and playback characteristics in a stable manner. Furthermore, these units can be assembled and adjusted very rationally and easily by adjusting the posture adjustment screws and rotating blocks.

EXAMPLE Hereinafter, a first example of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a recording/reproducing apparatus in a first embodiment of the present invention.

The head slider 12 on one side is a substantially flat carriage 1.
It is fixed to the tip of 9. Further, the other head slider 13 is fixed to a flat attitude adjustment plate 16. The posture adjustment plate 16 is provided with a plurality of holes, and the posture adjustment screws 1 with heads larger than the holes are inserted into these holes.
7 is inserted. These attitude adjustment screws 17 are fastened to female threads provided on a substantially flat arm 20 that is disposed at a position facing the carriage 19 at a predetermined interval. Furthermore, the arm 20 and the posture adjustment plate 16
A pressure spring 18 is provided in the gap between the two.

During operation, the head slider 12 is moved by sandwiching the rotating media l between the head sliders 12 and 13.
．． An interface with the media 1 is ensured by heads 14 and 15 arranged in the media 13, and input and output of signals is realized.

On the other hand, in order to improve vibration resistance/shock resistance, it is desirable to first make the carriage 19 and arm 20 systems as rigid as possible. Here, in particular, if the relative displacement between the carriage 19 and the arm 20 can be restrained by some means, ensuring good contact between the upper and lower heads 14 and 15 to the media 1 depends on part processing/assembly tolerances. This cannot be achieved without adjustment. The allowable tolerance for the head 14.15 to hit the media 1, which sufficiently guarantees the input/output characteristics, is that the head 14.15 can be considered to have almost no rigidity because the media 1 itself, which is made of resin with a thickness of several tens of microns, has almost no rigidity. determined by the relative positional relationship of In the case of a disk drive device using a floppy disk as a medium, it has been experimentally confirmed that relative angular deviation tolerance between heads is such that a tilt error of several tens of minutes is not allowed in each of the rolling and pitching directions. For example, if the head 14 on the carriage 19 side is considered as the reference, the arm 20
The mechanical assembly tolerance and the surface inclination of the joint surface of the head slider containing the head easily exceed the inclination tolerance of several tens of minutes. Therefore, in this embodiment, arm 2 on the adjustable side
The attitude adjusting plate 16 of Example 0 is changed in the rolling and pitching directions by independently raising and lowering the attitude adjusting screws 17, and the carriage 19 (the head 14 of II
The relative inclination between the movable head 15 and the head 15 on the movable side can be adjusted within tolerance. In particular, it is possible to make adjustments while monitoring the signal in playback mode using a medium on which the signal has already been recorded. Furthermore, the amount by which the heads 14 and 15 are pushed into each other through the media 1 can be finely and optimally controlled by adjusting the parallel movement of the attitude adjustment screw 17.

In particular, by increasing the rigidity of the posture adjusting plate 16 and the pressing spring 18, vertical fluctuations caused by the rotation of the media 1 are corrected and eliminated between the opposing head sliders 13 and 14. Furthermore, by improving the apparent unit rigidity seen as a head system, the vibration/shock resistance performance can be improved by several to several tens of times compared to the conventional one. That is, compared to the conventional gimbal method, which only considers a rigidity approximately equivalent to the rigidity of the media, this method has the advantage of being able to freely set the rigidity of the attitude adjustment plate/pressing spring system. Furthermore, by adopting this method, the processing/assembly accuracy required for each part can be made rougher than in the past.
This also greatly contributes to cost reduction during mass production.

Note that the pressure spring 18 may be used coaxially with the attitude adjustment screw 17, for example.

In this embodiment, only one side (the arm side is taken as an example) is provided with an adjustment mechanism, but the carriage 19, arm 20
It goes without saying that it may be provided on both sides. Further, the generality can be maintained even if the direction of screw fastening is from above or below.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a partial perspective view of the recording/reproducing apparatus in the embodiment. The difference from the first embodiment is that, at the tip of the arm 20, a part of the posture adjustment plate 16 is directly fixed to the arm body by adhesive or integrally, and on the other hand, the female threaded part 25 provided on the arm 20 is fixed directly to the arm body. The structure is such that one or more push-in adjustment screws 24 can be pushed in from above the arm. The point at which the tip of the push adjustment screw 24 acts is
It is set at an appropriate portion near the free end of the posture adjustment plate 16 fixed to the arm 20. A head slider 13 is fixed to the lower surface of the attitude adjustment plate 16, just as in the above embodiment.

The feature of this embodiment is that the attitude adjustment of the head slider 13 is
Rolling adjustment is performed by applying bending deformation of the posture adjustment plate 16 with the push adjustment screw 24, and pitching adjustment is performed by applying torsional deformation, and at the same time, it is possible to adjust the amount of push. In particular, by intentionally tilting the initial setting angle θ of the attitude adjustment plate 16 in one direction as shown in FIG. 2, the ± angle can only be adjusted in one direction (in the example in FIG.
rolling adjustment). Furthermore, since the posture adjustment plate 16 substitutes for the action of the pressing spring 18 used in the first embodiment, the number of parts is reduced and the adjustment work can be simplified, making it extremely suitable for mass production.

A third embodiment of the present invention will be described below with reference to FIG. FIG. 3 shows a partial plan view of the recording/reproducing apparatus in the embodiment. The difference from the first embodiment is that in addition to the pressure spring 18, a buffer body 21 made of damping material is provided in the space narrowed between the posture adjustment plate 16 and the arm 20. It is in. When frictional vibrations such as stick-slip or natural vibrations occur between the head sliders 12 and 13 sandwiching the media 1, these vibrations are absorbed by the attitude adjusting plate 16 to which the head slider 13 is fixed.
It propagates directly to the arm 20 via the pressure spring 18. From the perspective of vibration, the pressure spring 18 functions to improve the apparent rigidity of the head slider support system, and does not exert a damping effect once vibration occurs for some reason. By providing the buffer 21 as in this embodiment, one unit consisting of the head slider 13 and the attitude adjustment plate 16 can be moved to the arm 20.
can be separated using a vibration/impact model.

Therefore, by designing the arm 20 and the carriage 19 with a predetermined rigidity, improvement in performance against actual vibration/impact can be adjusted only by selecting the damping constant of the buffer 21. It has been confirmed that when this method is adopted, vibration resistance can be significantly improved, particularly near the natural frequency (300 to 400 Hz) of the media system, which is likely to occur in the current system.

Next, a fourth embodiment of the present invention will be described with reference to FIG. FIGS. 4(a) and 4(b) show a partial plan view and a front view of the recording/reproducing apparatus in this embodiment. 1st~
The difference from the third embodiment is that a substantially cylindrical rotation block 22 rotatably fitted to the arm 20 is provided near the attachment portion of the head slider 13 on the arm 20. Below the rotation block 22, as in the third embodiment, there is a head slider 13. Posture adjustment plate 16. Posture adjustment screw 17
, a pressure spring 18 and a buffer body 21 are installed in a predetermined arrangement. Thus, although the rotating block 22 apparently functions as part of the upper arm 20, the upper and lower heads 14.
15 relative azimuth alignment (alignment of the deviation angle between the signal recorded on the medium and the helad gap) can be easily performed by adjusting the rotation of the rotation block 22. After adjustment, the rotation block 22 can be fixed by bonding means such as adhesive. Furthermore, from the viewpoint of output matching and maintenance of the upper and lower heads, the rotary block 22 can be handled as a type of head unit, which is an extremely practical means.

As described above, the present invention makes it possible to rigidly hold the head slider unit using a strong elastic force generating means, and also makes it possible to adjust one or both of these units relative to the media using an attitude adjustment screw. Therefore, it is possible to provide a recording/reproducing device and an adjustment method thereof that have excellent vibration resistance and impact resistance, are easy to assemble and adjust, and are highly productive.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the main parts of a recording and reproducing apparatus according to the first embodiment of the present invention, FIG. 2 is a perspective view of the main parts of the recording and reproducing apparatus according to the second embodiment of the invention, and FIG. FIG. 4 is a plan view of the main parts of a recording/reproducing apparatus according to a third embodiment of the present invention.
a) and (b) are partial plan and front views of main parts of a recording/reproducing apparatus according to a fourth embodiment of the present invention, and FIG. 5 is a front view of main parts of a conventional recording/reproducing apparatus.

Claims (6)

[Claims] (1) It consists of a substantially flat carriage, at least a pair of substantially flat arms held approximately parallel to the carriage above and below at a constant interval, and a substantially rectangular parallelepiped block holding a head for inputting and outputting signals. and a head slider that is connected to the carriage and the arm to hold the recording medium at a predetermined contact pressure, and a thin plate-like member to which the head slider is fixed. A recording/reproducing device comprising: an attitude adjustment plate coupled to the attitude adjustment plate so as to be vertically adjustable by an attitude adjustment screw; and an elastic force generating means for biasing the attitude adjustment plate in a direction in which the attitude adjustment plate comes into contact with the attitude adjustment screw. . (2) A part of the attitude adjustment plate is fixed to the carriage or arm, an attitude adjustment screw for forcibly displacing the attitude adjustment plate is provided on the carriage or arm, and the attitude adjustment plate is fixed to the carriage or arm. 2. The recording/reproducing device according to claim 1, wherein the recording/reproducing device is fixed by giving a predetermined mounting angle θ to the mounting angle θ. (3) The recording/reproducing apparatus according to claim 1, further comprising a buffer provided in a gap between the attitude adjustment plate and the carriage or arm. (4) A rotary block having a multistage cylinder, a tapered cylinder, or a substantially cylindrical shape is rotatably disposed near the head slider attachment part of the carriage or arm, and a head slider and an attitude adjustment plate are attached to one end surface of the rotary block. 2. The recording and reproducing apparatus according to claim 1, further comprising a unit such as a posture adjustment screw. (5) Without reproducing the signal on the recording medium on which a predetermined recording signal has been recorded, appropriately adjust the posture adjustment screw to ensure good sliding contact between the head held by the head slider and the recording medium. A method for adjusting a recording/reproducing device, characterized in that: (6) While reproducing the signal on the recording medium on which a predetermined recording signal has been recorded, adjust the posture adjustment screw to ensure good sliding contact between the head held by the head slider and the recording medium, and then rotate 1. A method for adjusting a recording/reproducing device, comprising adjusting the relative azimuth of the heads in the upper and lower head sliders by rotating and adjusting a block in the circumferential direction.