JPH02177171A - Magnetic sheet device - Google Patents

Abstract

PURPOSE:To set the relative positions of the stabilizing plates and the magnetic heads with high accuracy and to secure a satisfactory head touch by driving the support members, and making the magnetic heads to abut alternately both sides of a magnetic sheet. CONSTITUTION:The stabilizing plates 44 and 45 are fixed to the magnetic heads 8 and 10 or the support members 4 and 6 and produced the negative pressure to a magnetic sheet 16 in response to the revolution of the sheet 16 to draw the sheet 16 toward both heads 8 and 10. Then a magnetic sheet back 12 is put into a magnetic sheet device 2 and an actuator 36 is separated from an arm part 6. Thus the arm 6 revolves around a fulcrum 24 until an abutting is secured between an adjusting screw 30 and a support base 26 by means of the force of a tensile spring 28. As a result, the stabilizing plate of the magnetic head produces the negative pressure to the sheet 16 to draw this sheet 16 and to secure an abutting with the magnetic head. Thus a satisfactory head touch is secured.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an AI9 sheet device that can perform recording and reproduction using both sides of a magnetic sheet.

<Prior Art> Conventionally, in a magnetic sheet device that performs recording and reproduction using both sides of a magnetic sheet (for example, a regulation for generating positive pressure between the magnetic sheet and the magnetic sheet to obtain a good head touch) has been developed. There is a WIWII configuration that incorporates a plate.In other words, a pair of magnetic heads are provided with a magnetic sheet in between so that they can move toward and away from the magnetic sheet, and a pair of regulating plates are also provided with a magnetic sheet in between. Then, by sandwiching the magnetic sheet and moving the magnetic head on the side facing each regulation plate, the magnetic heads are brought into contact with the m9c sheet to perform the necessary recording and reproduction. Since positive pressure is generated between the magnetic sheet and the magnetic sheet to push the magnetic sheet toward the magnetic head, it is possible to obtain a good head touch.

<Problem to be solved by the invention> A regulating plate is provided at a position facing the magnetic head by sandwiching the magnetic sheet, and a good head touch is obtained by the positive pressure generated between the regulating plate and the rotating magnetic sheet. In conventional magnetic sheet devices, the magnetic head and regulating plate must be provided separately due to their configuration, and therefore extremely precise A that you have to work on positioning! There was a problem.

Furthermore, in a device configuration in which both sides of the magnetic sheet are used for recording and reproduction, each set of the magnetic head and regulating plate described above must be provided independently for 2M, making it increasingly difficult to adjust their positioning. There was a problem that head touch could not be achieved.

Means for Solving the Problems> A magnetic sheet device according to the present invention includes a pair of magnetic heads disposed on the front side and the back side of an at magnetic sheet, and each of the magnetic heads is connected to the magnetic sheet. The magnetic sheet generates a negative pressure between a supporting member that is supported in a separable manner and the magnetic sheet that is fixedly attached to the magnetic head or the supporting member and approaches the magnetic sheet as the magnetic sheet rotates. It is characterized by comprising a stabilizing plate that draws the magnetic head toward the head side, and a driving means that drives the support member to alternately bring each of the magnetic heads into contact with and away from the recording surface on the front side or the back side of the magnetic sheet. It is something.

Function> Each of the magnetic heads supported by a support member and disposed on each of the front and back sides of the magnetic sheet operates a drive means that drives the support member, thereby driving the magnetic head on each of the front and back sides of the magnetic sheet. At the same time, a stabilizing plate provided on the magnetic head or supporting member generates negative pressure between the magnetic sheet and the rotating magnetic sheet, thereby achieving good head touch of the magnetic head. and performs suitable double-sided recording and reproduction.

Embodiment Hereinafter, an embodiment of the magnetic sheet device according to the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, one embodiment of the magnetic sheet mounting [
Reference numeral 2 indicates two arm parts 4 and 6 arranged substantially parallel to each other in the left-right direction in the figure, and a magnetic field provided at each of the left end parts of the arm parts 4 and 6 in the figure. Heads 8 and 10 are provided. The magnetic heads 8 and 10 are provided facing each other, and a magnetic recording medium (hereinafter referred to as a magnetic sheet) 16 is positioned between them. Also, the magnetic heads 8, 10
0 each includes a stabilizing plate 44.4 that generates negative pressure between the magnetic sheet 16 and the magnetic sheet 16 as the magnetic sheet 16 rotates, and draws the magnetic sheet 16 toward the respective sides of the magnetic heads 8 and 10.
5 are integrally fixed. In other words, the stabilizers 44, 45
Both have inclined surfaces 46 formed so as to gradually move away from each of the front and back surfaces of the magnetic sheet 16 in a stationary state as it goes from the upstream side to the downstream side in the rotational direction (arrow R direction) of the magnetic sheet 16. It is provided. magnetic sheet 1
6 is rotatably stored inside a magnetic sheet pack 12 for use, and the magnetic sheet pack 12 is attached to the magnetic sheet device 2 in such a way that the center of rotation of the magnetic sheet 16 is located on the back side of the page. Be put on and taken off. Window portions 14 are formed on the front and back surfaces of the magnetic sheet pack 12, respectively.
When this magnetic rate pack 12 is attached to the magnetic sheet device 2, the internal magnetic sheet 16 directly faces the magnetic helads 8 and 10 through the window portion 14.

The arm 4 is rotatably connected via a fulcrum 18 to the tip of a protrusion 5 protruding from the right end in the figure of the arm ε, and is wound around the fulcrum 18. It is urged downward in the figure by the spring 20 with the fulcrum 18 as the center of rotation,
It is in contact with the tip of the support section 22 provided on the projection section 5 . Further, the arm portion 6 is attached to a portion 2 protruding from the support base 26.
It is rotatably supported via a fulcrum 24 of 7, and is urged toward the support base 26 by a tension spring 28 interposed between the arm portion 6 on the right side in the figure and the support base 26. There is. Reference numeral 30 designates an adjustment screw that is screwed into and passes through the arm portion 6, and its lower end is brought into contact with the support base 26 by the biasing force of the tension spring 28 mentioned above. That is, by turning this adjustment screw 30, the distance between the support base 26 and the arm portion 6 is changed. A similar adjustment screw 32 is attached to the arm 4.
The lower end position of this MU screw 32 moves with the rotation of the arm part 4 and comes into contact with the upper end part of the mounting part 27. An actuator 36 is installed on the side of the tension spring 28, and when actuated, the actuator 38 of the actuator 36 advances or retreats upward or downward while contacting the arm 6, and the arm 6 and the arm Part 4 is the fulcrum 24
As a result, each of the magnetic heads 8.degree. 10 alternately contacts the recording surface on the front side or the rear side of the magnetic sheet 16, thereby performing recording and reproduction.

In other words, the magnetic sheet pack 12 is transferred to this magnetic sheet device 2.
When the actuator 36 is moved away from the arm 6, the arm 6 rotates about the fulcrum 24 due to the biasing force of the tension spring 28 until the adjustment screw 30 comes into contact with the support base 26. As a result, the magnetic head 10 attached to the tip of the arm 6 approaches near the recording surface of the magnetic sheet 16 on the lower side in the figure, and the stabilizer plate 45 of the magnetic head 10 is separated from the magnetic sheet 16. Recording and reproduction of the lower recording surface of the magnetic sheet 16 is performed by generating a negative pressure to draw the g1gF% sheet 16 and bring it into contact with the magnetic head 10. Furthermore, when the actuator 36 is actuated to push the actuating portion 38 upward in the figure by a predetermined amount, the arm portion 6 and the arm portion 4 connected thereto rotate about the fulcrum 24, and the arm portion 6 aj9F% As the head 10 moves away from the magnetic sheet 16, the magnetic head 8 of the arm portion 4 approaches the upper recording surface of the magnetic sheet 16 in the figure. At this time, the stabilizing plate 44 provided on the magnetic head 8 generates negative pressure between it and the magnetic sheet 16 to draw the magnetic sheet 16 and bring it into contact with the magnetic head 8, thereby causing the upper recording surface of the magnetic sheet 16 to Recording/playback is performed.

Furthermore, as shown in FIG. 2, another embodiment of the magnetic sheet device according to the present invention, an upper arm 52 in the figure and a lower arm 54 in the figure are disposed approximately parallel to each other, and The right end of the portion 52 in the drawing is rotatably connected via a fulcrum 56 to the tip of a connecting portion 53 that projects from the right end of the arm 54 in the drawing. This arm portion 52 is biased so that the left end in the figure is lowered by a spring 62 wound around the fulcrum 56, and an adjustment screw is provided through the arm portion 52 on the side of the fulcrum 56. The lower end of the screw 64 is set at a predetermined angle by coming into contact with a support portion 66 protruding from the connecting portion 53. Further, the arm portion 54 is provided so as to be able to freely slide through a guide rod 70 which is vertically protruded on the support base 68, and surrounds the guide rod 70 and connects the tip side of the guide rod 70 and the arm portion 54. It is pressed downward in the figure by a compression spring 72 interposed between the upper end surface and the upper end surface.

Magnetic heads 57 and 58 are provided at the left end portions of each of the arm portions 52 and 54 in the drawing to face each other. Further, each of the magnetic heads 57 and 58 has a stabilizing plate that generates a negative pressure between the magnetic sheet 16 and the magnetic sheet 16 as the magnetic sheet 16 rotates, and draws the magnetic sheet 16 toward each side of the magnetic head 57 and 58. 59 and 60 are integrally fixed. In other words, the stabilizing plates 59 and 60 are formed so as to be gradually separated from the front and back surfaces of the magnetic sheet 16 in a stationary state as it goes from the upstream side to the downstream side in the rotating direction (arrow R direction) of the magnetic sheet 16. A sloped surface 61 is provided.

Further, an actuator 74 is provided on a base plate 71 of the arm portion 54 located downward in the figure, and the tip of the actuating portion 73 of the actuator 74 comes into contact with the lower end surface of the arm portion 54, and the arm portion 54 is raised or lowered.

Above the actuator 74 is an arm portion 5 which is screwed into a member 78 extending above the base plate 71 and whose lower end is in a predetermined position.
A vR setting screw 76 that can come into contact with the upper end surface of 4 is provided.

Therefore, the actuator 74 of the magnetic sheet device 50
By activating the arm 54, the arm 54 slides along the guide rod 70, and the arm 52 also moves up and down in the figure. Each of the magnetic heads 57 and 58 provided on each of the arms fi52 and 54 approaches the front and back surfaces of the magnetic sheet 16 alternately, and the a1 air sheet due to the action of the respective stabilizing plates 59 and 60. 16 is attracted to the magnetic heads 57 and 58 and comes into contact with the magnetic heads 57 and 58 to perform stable double-sided recording and reproduction.

Incidentally, in each of the embodiments described above, the pair of magnetic heads 8, 10 and 57, 58 are provided so as to face each other, but they do not necessarily have to be placed in opposing positions. , 60 are provided integrally with the magnetic head, but in addition to this, the stabilizing plates 44, 45° 59, 60 may be attached to the arm portions 4, 6, 52, 54, respectively. Furthermore, the shape of the stabilizer plate 44, 45, 59, 60 is not limited to that of this embodiment as long as it is of a negative pressure generation type, and the shape of the stabilizer plate 44, 45, 59,
, 58, together with the arms 4, 6, 52, 54, etc., alternately moving forward and backward toward the front and back sides of the magnetic sheet, the mechanism is not limited to this embodiment.

<Effects of the Invention> According to the magnetic sheet device according to the present invention, a magnetic head and a negative pressure generating type stabilizing plate for attracting a magnetic rate to the magnetic head are disposed on each of the front and back sides of the magnetic sheet. , and by driving the support member that supports both the magnetic head and the stabilizer plate by a driving means, and making each magnetic head alternately contact the front and back surfaces of the magnetic sheet, it is possible to generate positive pressure using the conventional method. Unlike the configuration using a molded stabilizer plate (regulating plate), it is no longer necessary to independently install the stabilizer plate and the magnetic head and to position them independently. Therefore, the number of manufacturing steps can be significantly reduced and costs can be reduced, and the relative position between the stabilizer plate and the magnetic head can be set with extremely high precision, resulting in good head touch, thereby realizing stable double-sided recording and reproduction.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing one embodiment of the magnetic sheet device according to the present invention, and FIG. 2 is a schematic cross-sectional view showing another embodiment. In the figure, 2,50 is a magnetic sheet device, 4,6°52.54
5 is an arm portion, 5 is a protrusion, 8, 10, 57° 58 is a magnetic head, 12 is a magnetic seat back, 16 is a magnetic sheet, 18
, 24.56 is a fulcrum, 20.62 is a spring, 26.68 is a support stand, 28 is a tension spring, 30, 32, 76 is an adjustment screw, 36.74 is an actuator, 44, 45, 59
60 is a stabilizing plate, and 72 is a compression spring. Patent application Agent: Fuji Photo Film Co., Ltd.

Claims (1)

[Claims] a pair of magnetic heads disposed on the front side and the back side of the magnetic sheet, a support member that supports each of the magnetic heads so as to be movable toward and away from the magnetic rate, and a support member for supporting the magnetic head or the support member; a stabilizing plate that is fixedly installed and generates a negative pressure between adjacent magnetic sheets as the magnetic sheet rotates to draw the magnetic sheets toward the respective magnetic heads; 1. A magnetic sheet device comprising: driving means capable of moving each of the magnetic heads toward and away from a recording surface on the front side or the back side of the magnetic sheet.