JPH0370306B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a rotating magnetic sheet device, and particularly to a rotating magnetic sheet device used as a magnetic recording device or a reproducing device in an electronic still camera or the like.

<Background technology> Recently, imaging devices such as solid-state imaging devices and image pickup tubes,
In combination with a recording device that uses a magnetic disk, which is inexpensive and has a relatively large storage capacity, as a recording medium, the subject is still photographed purely electronically and recorded on a rotating magnetic sheet, and the images are played back using a separate television system or An electronic still camera system that uses a printer has been developed and is attracting a lot of attention.

The magnetic sheets used in such systems are usually in the form of magnetic sheet packs. A magnetic sheet pack rotatably stores a magnetic sheet for magnetically recording still image information, etc., and is used by loading it into a rotating magnetic sheet device built into an electronic camera.

The rotating magnetic sheet device includes a mechanism for rotating a magnetic sheet housed in a magnetic sheet pack and a magnetic head, and is capable of recording and reproducing data on and from the magnetic sheet while rotating the magnetic sheet. In order to ensure reliable recording and reproduction of magnetic sheets in a rotating magnetic sheet device, a magnetic head must be stably brought into contact with a magnetic sheet rotating at high speed. For this reason, a technology has been developed in which a regulating plate is provided that faces the magnetic head with the magnetic sheet in between, and the magnetic sheet is brought into stable contact with the magnetic head by air flow between the regulating plate and the magnetic sheet. (Jitsukai 57-
201696, Jitsukai Showa 59-5046). In such technology, if the regulating plate is inclined, the distance between the regulating plate and the magnetic head is not within a predetermined dimension, or the regulating plate is deviated from a predetermined position with respect to the magnetic head, the above-mentioned effects may occur. cannot be expected. Conventionally, a mechanism for finely adjusting the position and height of the regulating plate was provided, and after the assembly of the rotating magnetic sheet device was completed, the regulating plate was finely adjusted to a predetermined position and height with respect to the magnetic head. However, performing such fine adjustment work for each completed rotating magnetic sheet device is complicated and unsuitable for mass production.

Therefore, as a rotating magnetic sheet device that does not require such fine adjustment of the regulating plate, two positioning pins 1, 2 and three height regulating pins 3, 4, 5 (however, pin 5 is hidden behind pin 3 and cannot be seen) has been proposed. That is, as shown in the figure, a top cover 7 is attached to the rotating magnetic sheet device main body 6 via a bracket and a pin (not shown) so that it can be opened and closed freely. It is designed to be loaded horizontally. The device main body 6 includes a motor 10 that rotates a magnetic sheet 9 housed in a magnetic sheet pack 8 at a predetermined number of rotations.
A magnetic head 11 is disposed in a case 12 and is driven to feed the rotating magnetic sheet 9 in the rotation radial direction (left and right directions in the figure). It is located on the bottom side of 8. On the other hand, a regulating plate holder 15 is attached to the back surface of the upper lid 7 via leaf springs 13 and 14, and when the upper lid 7 is closed as shown in the figure, the regulating plate holder 15 is attached to the loaded magnetic sheet pack. Located on the top side of 8. Positioning pins 1, 2 and height regulating pins 3, 4, 5 for regulating the position and height of the regulation plate holder 15 are provided on the upper surface of the side wall of the case 12, and the holes in the regulation plate holder 15 are 15
The height and position of the regulation plate holder 15 are determined by fitting the plates 15a and 15b or by abutting against their lower surfaces. A regulating plate 16 is attached to the regulating plate holder 15 so as to be positioned at a predetermined height relative to the magnetic head 11 with the magnetic sheet 9 in between.

Further, the regulating plate 16 has grooves 1 along the radial direction of the magnetic sheet 9, that is, the moving direction of the magnetic head 11.
6a is provided, and the magnetic head 11 and the magnetic sheet 11 rotated at high speed can come into sliding contact within the groove 16a.

In the rotating magnetic sheet device having such a configuration, the regulation plate 16 is required to have high precision in order to obtain a good head touch, and has a complicated shape. Therefore, it is conceivable that the regulation plate 16 is manufactured by injection molding using plastic or the like.
With current injection molding technology, it is not only difficult to keep all shape accuracy within the design values, but even if the height and position of the regulating plate holder 15 are set as described above, the alignment plate 16 and the magnetic head There was a possibility that the distance from No. 11 would be outside the allowable range (about several tens of μm) with respect to the design value.

<Object of the Invention> In view of the above-mentioned prior art, the present invention provides a rotating magnetic sheet device in which the distance between the regulating plate and the magnetic head can be accurately matched to a designed value without depending on the precision of the regulating plate itself. The purpose is to

<Structure of the Invention> The structure of the present invention to achieve the above object is a rotating magnetic sheet device in which a regulating plate is provided at a position facing a magnetic head while sandwiching a magnetic sheet being driven and rotated, wherein the regulating plate is attached to the main body of the device. The regulation plate is held by a regulation plate holder having a predetermined positional relationship with a reference plane provided in the regulation plate, the regulation plate holder is provided with a through hole for holding the regulation plate, and the regulation plate inserted into the through hole is The regulating plate is positioned in advance on the regulating plate holder with adhesive so that it is at a predetermined height with respect to the reference plane so that it faces the magnetic head at a predetermined distance with the magnetic sheet in between. It is characterized by being fixed.

<Effects of the Invention> In the present invention having the above configuration, after inserting the regulating plate into the through hole of the regulating plate holder, the regulating plate is positioned and fixed with an adhesive so that the height of the regulating plate is set to a predetermined height with respect to the reference plane. As a result, the spacing between the adjusting plate and the magnetic head accurately matches the design value, and as a result, there is no need to fine-tune these spacings after manufacturing.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 2 shows an embodiment of the present invention. As shown in the figure, the device main body 18 into which the magnetic sheet pack 17 is loaded is connected to a motor 20 that rotates the magnetic sheet 19 housed in the magnetic sheet pack 17 at a predetermined number of rotations, and a motor 20 that rotates the magnetic sheet 19 in a radial direction relative to the rotating magnetic sheet 19. A magnetic head 21 that is driven to be fed in the horizontal direction (in the figure) is disposed within a case 22, and these motor 20 and magnetic head 21 are located on the lower surface side of the magnetic sheet pack 17. The regulating plate holder 23 is attached to the upper surface 22 of the side wall of the case 22.
a, 22b as reference planes, reference planes 22a, 22
b, and is located on the upper surface side of the magnetic sheet pack 17. The regulating plate holder 23 includes
A through hole 24 passing vertically is formed directly above the magnetic head 21, and a regulating plate 25 is inserted into the through hole. Engagement parts 25a and 25b are provided protruding from the upper side of the regulating plate 25, and the regulating plate 25 is positioned with adhesive so that the lower surface of the regulating plate 25 is at a predetermined height with respect to the reference surfaces 22a and 22b. Fixed. Positioning and fixing with adhesive is simple and accurate using a jig 26, as shown in FIGS. 3 to 5. That is, the jig 26 includes height regulating pins 28 that support the regulating plate holder 27 at three points;
29, 30 and the hole 31 of the regulating plate holder 27,
32, and a height regulating convex portion 36 that comes into contact with the regulating plate 35 to adjust its height. The regulating plate holder 27 is placed on this jig 26 as shown in FIGS. 3 and 4, and the through hole 3 of the regulating plate holder 27 is
After inserting the regulating plate 35 into the hole 7, an adhesive 38 is poured between the through hole 37 and the regulating plate 35 to fix them. Since the height of the height regulating convex portion is d higher than the height regulating pins 28, 29, and 30, after fixing the regulating plate 38 using adhesive in this way, as shown in FIG. , when the regulating plate holder 27 is transferred to the reference surfaces 40 and 41 of the case 39 of the device main body,
The height of the regulation plate 35 with respect to the reference planes 40 and 41 is d
becomes. Further, the magnetic head 42 also has reference surfaces 40 and 4.
1 using an aligner or the like, and the height of the magnetic head with respect to the reference plane is set to d' with high precision, so the distance between the regulating plate 35 and the magnetic head 42 |d-d'| This results in accurate agreement with the design value.

In this way, the regulating plate 3 for the magnetic head 42
Since the interval 5 exactly matches the design value, there is no need to finely adjust the height of the regulating plate 35 after this, and this regulating plate allows the magnetic sheet to be brought into stable contact with the magnetic head, resulting in a good result. Recording and playback can be performed. Incidentally, since the above-mentioned effects are not diminished by the accuracy of the regulating plate 35 itself, there is no need to manufacture a highly accurate regulating plate at high manufacturing cost.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the previously proposed rotating magnetic sheet device, and FIGS. 2 to 5 are related to the present invention.
The figure is a sectional view of one embodiment of the present invention, FIG. 3 is a perspective view showing how the regulating plate holder and the regulating plate are placed on the jig, and FIG. 4 is the position of the regulating plate, the regulating plate holder, and the jig. FIG. 5 is a sectional view showing the positional relationship between the regulating plate reference plane and the magnetic head. In the drawing, 17 is a magnetic sheet pack, 18 is the device body, 19 is a magnetic sheet, 20 is a motor, 11,
21, 42 are magnetic heads, 22a, 22b, 4
0 and 41 are reference planes, 15, 23 and 27 are regulating plate holders, 24 and 37 are through holes, 16, 25 and 35 are regulating plates, 27 is a jig, and d and d' are heights.

Claims (1)

[Claims] 1. In a rotating magnetic sheet device in which a regulating plate is provided at a position facing a magnetic head while sandwiching a magnetic sheet to be driven and rotated, the regulating plate has a predetermined positional relationship with a reference plane provided on the device main body. The regulating plate is held by a regulating plate holder, and the regulating plate holder is provided with a through hole for holding the regulating plate, and the regulating plate inserted into the through hole is attached to the magnetic head with the magnetic sheet in between. A rotating magnetic sheet device characterized in that the regulating plate is positioned and fixed in advance to the regulating plate holder with an adhesive so as to face the regulating plate at a predetermined height with respect to the reference plane so as to face each other at a predetermined interval.