JPH03150761A - Recording or reproducing device - Google Patents

Abstract

PURPOSE:To prevent the damage of a magnetic sheet by providing a projecting part or a recessed part at a part of a negative pressure and except a surface opposite to a magnetic sheet and then forming a stay part for adhesives. CONSTITUTION:A pad 5 produces the negative pressure, and a recording medium is drawn toward a magnetic head 4 when the medium moves to its attachment part near the head 4. When a carriage 6 or the head 4 is adhered to the pad 5, the adhesives 14 stay at a recessed part or a projecting part 5-1 and stopped there. Thus the adhesives 14 are never attached to the upper surface 5-5 of the pad 5 and the tip of the head 4. Thus the recessed part or the part 5-1 is provided to such parts except the surface of the pad 5 opposite to a magnetic sheet 3 as the outer circumferential side face, the bottom surface, and a projecting hole of the head 4 respectively. Thus it is possible to improve the recording and reproducing operations and to prevent the damage of the sheet 3 due to the attachment of the adhesives 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the shape of a running stabilizer for a recording or reproducing device.

[Prior Art] Conventionally, in a recording or reproducing device that performs recording or reproduction on a rotating magnetic sheet or the like, a sheet stabilizing plate is used to keep the relative position of the rotating magnetic sheet and magnetic head stable during recording or reproduction. has been devised. What is shown in Figures 3-a and 3-b is an example of a seat stabilizer commonly called a negative pressure pad. This utilizes the negative pressure generated by the relative movement of a rotating magnetic sheet placed opposite to the magnetic sheet to attract the magnetic sheet toward the magnetic head and keep the relative position of the two stable.

This negative pressure pad can be fixed by bonding the head carriage 104 on which the magnetic head 101 is attached and the outer peripheral side of the negative pressure pad 102 as shown in Figure 3-a, or by gluing the outer peripheral side of the negative pressure pad 102 as shown in Figure 3-b. Similarly, magnetic head 101 and negative pressure pad 1
There is a method of bonding between the bottom surface of 02 and the head protrusion hole 105, etc.

[Problem to be Solved by the Invention] However, in the above conventional example, when bonding the negative pressure pad, the adhesive 103 is attached to the upper surface 102-1 of the negative pressure pad 102.
In some cases, the magnetic head 101 may even reach the tip of the magnetic head 101 .

Even if the adhesive 103 wraps around the upper surface 102-1 of the negative pressure pad, which is the surface facing the magnetic sheet, as shown in FIG. Damage the recording surface of the magnetic sheet,
This makes playback impossible.

Furthermore, if the adhesive 103 gets around to the tip of the magnetic head 101 as shown in Figure 3-b, it may cover the sliding surface of the magnetic head 101 or damage the magnetic sheet, causing recording/reproduction to fail. The drawback was that it would no longer be possible.

[Means for Solving the Problems] The present invention was made for the purpose of solving the above-mentioned problems, and is characterized by the ability to perform recording or recording by relatively driving a recording medium and a head. In a recording or reproducing apparatus that performs reproduction, a pad is provided at a mounting portion near the head to generate negative pressure in order to draw the recording medium toward the head as the recording medium moves B, and the pad is configured to The recording or reproducing device is provided with a recessed portion, a cutout portion, or the like in a position near the mounting portion that does not face the recording or reproducing device.

[Function] As a result, a pool of adhesive is formed in the adhesive portion of the pad, and it is possible to prevent the adhesive from flowing out to the surface of the pad facing the magnetic sheet and the tip of the magnetic head.

[Actual example] The recording or reproducing apparatus according to the present invention will be described below.

The embodiment will be described in detail with reference to each figure.

FIG. 1 is a perspective view showing an embodiment of the recording or reproducing apparatus of the present invention.

In the figure, reference numeral 1 denotes a disk jacket, in which a recording magnetic sheet 3 is rotatably housed. At the center of the magnetic sheet 3, there is a center core 2 that is securely positioned and held with a spindle attached to a rotating shaft of a spindle motor 10, which will be described later.

Reference numeral 13 denotes a disk drive device that rotates the disk inside the loaded disk jacket.

4 is a magnetic head for recording and reproducing, and 5 is a negative pressure pad that is arranged around the magnetic head 4 and generates an attractive force (negative pressure) by rotation of the disk, the details of which will be described later. head 4
The negative pressure pad 5 is fixed to a helad carriage 6 for driving the head by adhesive.

The head carriage 6 has a convex portion 7 of an elastic member 7 such as a plate spring.
It is engaged with a head feeding mechanism, that is, a step motor 9 and a lead screw 8 via a. The other end is supported by a guide rod 12 so as to be able to slide freely in the axial direction, and is driven by a motor 9 to move the magnetic sheet 3 by a predetermined amount.
is driven in the radial direction shown by arrow A. 10 is a spindle motor that rotates the magnetic sheet 3, and has a chucking section 11 that holds the center core 2 of the disk.

The chucking portion 11 and the magnetic sheet are held in a removable manner by well-known means when the disk jacket is attached or removed. The rotation of the spindle motor 10 rotates the magnetic sheet 3, and due to the hydrodynamic action between the sheet 3 and the negative pressure pad 5, the sheet 3 is attracted to the pad 5 and pressed against the magnetic head 4. This means that you can get a good head touch.

Figure 2-a shows an embodiment of the negative pressure pad shape according to the present invention. Further, Fig. 2-b and Fig. 2-a show other embodiments of the negative pressure pad shape that can be applied to the present invention. In these figures, 5-1 to 5-4 are concave and convex portions for preventing the adhesive 14 from running around the upper surface 5-5 of the negative pressure pad and the tip of the magnetic head 4. Due to these recesses, when bonding,
A pool of excess adhesive is formed and can be prevented from flowing onto the pad and the upper surface of the head. 5-1 and 5-3 are recesses provided on the entire circumference or a part of the outer peripheral side surface of the negative pressure pad 5, and 5-2 is a recess provided on the entire circumference or a portion of the magnetic head protrusion hole 5-6 of the negative pressure pad 5. The convex part 5-3 is a convex part provided on the entire circumference or part of the vicinity of the magnetic head protrusion 5-7 on the bottom surface of the negative pressure pad 5, and the shape and installation of these concave and convex parts are Needless to say, the location can be changed depending on the application position of the adhesive 14.

When adhesively fixing the negative pressure pad 5 and the carriage 6 or the magnetic head 4, the adhesive 14 is applied to the opening/convex portions 5-1 to 5.
-4 and is dammed up, so it does not adhere to the upper surface 5-5 of the negative pressure pad, which is the surface facing the magnetic sheet 3, and to the tip of the magnetic head 4.

Therefore, the adhesive 14 does not damage the recording surface of the magnetic sheet 3 or cover the sliding surface of the magnetic head 4, and it is possible to always perform good and reliable recording and reproduction on the magnetic sheet 3. becomes.

[Effects of the Invention] As explained above, according to the recording or reproducing apparatus of the present invention, adhesive is not applied to the negative pressure pad at locations other than the surface facing the magnetic sheet, such as the outer peripheral side surface, the bottom surface, the magnetic head protrusion hole, etc. By providing a concave or convex portion that forms a pool, it is possible to prevent adhesive from adhering to the upper surface of the negative pressure pad and the tip of the magnetic head, and thereby prevent malfunctions in recording and reproducing operations of the 611 sheet, thereby improving the performance of the device. This has the effect of increasing stability and reliability.

4. What about the drawings? 'J! ! - Explanation Fig. 1 is a perspective view showing the configuration of an embodiment of the recording or reproducing device according to the present invention, and Fig. 2-a, Fig. 2-b, and Fig. 2-a show a negative 3-a and 3-b are cross-sectional views showing the shape of a conventional negative pressure pad.

3...Magnetic sheet 4.101...Magnetic head 5.102...Negative pressure pad 5-1.5-2.5-3.5-4...Concave/convex portion 5-5
, 102-1.・・・Negative pressure pad top surface 5-6, 105・
...Magnetic head protrusion hole 6.104...Carriage explosion 3-α diagram %3-mark

Claims (2)

[Claims] (1) In a recording or playback device that performs recording or playback by relatively moving a recording medium and a head, a mounting portion near the head draws the recording medium toward the head as the recording medium moves. 1. A recording or reproducing device characterized in that a pad for generating negative pressure is provided, and the pad has a concave portion or a convex portion formed in a position near the mounting portion facing the recording medium. (2) The recording or reproducing device according to claim (1), wherein the recess or protrusion is a pool of adhesive for bonding the pad to the mounting portion.