JPS6241436Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic sheet reproducing device that improves the adhesion between the magnetic sheet and the magnetic head with a simple structure.

Conventionally, magnetic sheet recording and reproducing devices have been used in which a magnetic head is pressed into contact with a magnetic sheet having a spiral track, and this magnetic head is driven in a spiral shape to record and play back, but the magnetic sheet itself is extremely soft. Because of this, a minute gap is created between the magnetic head and the magnetic head. In particular, in conventional magnetic sheet recording and playback devices, the free end of the sheet presser plate is pushed into a locking means provided on the main body of the device and fixed. The sheet holding plate itself tends to tilt toward the magnetic head on the turntable toward the end.
Therefore, when the magnetic head rotates together with the turntable, the degree of contact between the magnetic sheet and the magnetic head varies depending on the position of the magnetic head, resulting in a problem that reproduction performance is impaired.

The present invention provides a magnetic sheet reproducing device that solves these problems.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

In FIG. 1, 1 is the main body of the device, 2 is a sheet placement surface consisting of its upper surface, and 3 is a sheet placement surface 2.
3a is a groove provided in the turntable 3 in the radial direction; 4 is a magnetic head that moves in the radial direction within the groove 3a by a driving means (not shown); 5a, 5b, 5c; ,5d,5e,
5f, 5g are protrusions for positioning the magnetic sheet, 6
7 is a release button, and 7 is a rear end connected to the main body 1 of the device via a shaft 8.
This is a lock plate provided at the front end of the seat holding plate 7 which is rotatably attached to the seat plate 7.

FIG. 2 shows the internal structure, where 10 is a magnetic sheet and 11 is a board mounted inside the main body 1 of the device. A turntable 3 is rotatably provided on this substrate 11, a magnetic head 4 is provided on this turntable 3, and the turntable 3 is rotated with the shaft 12 as the central axis, so that the magnetic head 4 is spirally radially moved. Move and play. Substrate 11
A fixing base 13 is provided at the rear end, the sheet presser plate 7 is rotatably provided at one end of the fixer's base 13 via a shaft 8, and a lock plate 9 is provided at the front end of the sheet presser plate 7. Therefore, by closing the sheet press plate 7, the magnetic sheet 10 is brought into surface pressure contact with the sheet placement surface 2 of the apparatus main body 1 and fixed. On the other hand, the sheet holding plate 7 is engaged with a lock slide plate 14 disposed on the base plate 11 and biased in one direction by a spring 18 via the lock plate 9. A slide plate mounting member 15 to which the lock slide plate 14 is slidably mounted is provided with a leaf spring 16 that always biases the sheet press plate 7 in the open direction. One end of the lock slide plate 14 protrudes to the outside of the device main body 1, and a release button 6 is press-fitted therein.

Figure 3 shows the lock slide plate 14 and mounting member 15.
FIG. Locking pieces 15a to 15b are provided on both ends of the upper surface of the mounting member 15, and the lock slide plate 14 is slidably attached to the mounting member 15 through recesses 14a to 14d provided at both ends of the lock slide plate 14. A spring 18 is provided to bias the plate 14 in one direction, and a hole 19 is provided in a part of the lock slide plate 14.
The lock plate 9 engages with this hole 19. The specific engagement operation will be explained with reference to FIGS. 4 and 5, but only the relationship between the lock slide plate 14 and the mounting member 15 will be explained here. First, before the lock plate 9 is engaged, the hole 19 is at the position shown in FIG. 3 19a,
The outer end of the lock slide plate 14 is in the position shown in FIG. 3 20a. Next, when the sheet holding plate 7 is closed and the lock plate 9 is engaged with the hole 19 of the lock slide plate 14, the hole 19 is formed as indicated by diagonal lines in FIG.
b, with the outer end located at 20b. To release this engagement, slide the release button 6 in the direction of arrow 17 in FIG. 3. In this way, the hole 19 moves to the position 19c in FIG. After that, the leaf spring 1 shown in FIG.
The sheet pressing plate 7 is pushed up by the urging force 6.

FIG. 4 is a diagram for explaining the engagement operation between the lock plate 9 and the lock slide plate 14. When the sheet holding plate 7 is closed, the tip of the lock plate 9 slides into the hole 19a of the lock slide plate 14, but at this time, the lock slide plate 14 is biased by the biasing force of the spring 18 due to the inclined surface 9a at the tip of the lock plate 9. 3 in the direction of arrow 17 in FIG. When the sheet holding plate 7 is completely closed, the inclined surface 9a of the lock plate 9 passes through the hole 19 of the lock slide plate 14, so that the hole 19 of the lock slide plate 14 is closed by the biasing force of the spring 18. 9 (see Figure 5). Also, sheet presser plate 7
When completely closed, the urging force of the leaf spring 16 presses the tip of the lock plate 9 upward in the direction of the arrow 21 in FIG.
In this state, the sheet presser plate 7 is fixed. As a result, no matter where the magnetic head is located on the turntable 3, the sheet presser plate 7 is fixed so that the mounting height is equal to the magnetic head 4.

FIG. 5 shows a state in which the lock plate 9 and the lock slide plate 14 are engaged. To release this engagement, the lock slide plate 14 may be moved in the direction of the arrow 22 by operating the release button 6. By doing this, the lock plate 9 and the lock slide plate 14
are disengaged, and the sheet presser plate 7 and lock plate 9 are automatically pushed upward by the biasing force of the leaf spring 22. Therefore, subsequent operations to open the sheet holding plate 7 and to take out the magnetic sheet 10 can be performed very easily.

It should be noted that if the leaf spring 16 directly biases the tip of the lock plate 9 as in the above embodiment, the entire device can be constructed extremely compactly.

Of course, the present invention can be similarly applied to a reproduction-only device.

In this way, the present invention is such that the sheet presser plate is always biased in the open direction when the sheet presser plate is locked, so that the fixed height of the sheet presser plate relative to the magnetic head can be maintained evenly. By increasing the degree of adhesion between the magnetic head and the magnetic sheet, the reproduction performance can be improved. Furthermore, since the sheet presser plate is automatically pushed up when the sheet presser plate is unlocked, it is possible to easily open the sheet presser plate and take out the magnetic sheet.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a sectional view of the main part thereof, Fig. 3 is a plan view of the main part of the above embodiment, and Figs. 4 and 5 are main parts of the above embodiment. FIG. 1... Apparatus main body, 2... Sheet placement surface, 3...
Turntable, 3a...Groove, 4...Magnetic head, 5a to 5d...Seat positioning member, 6...
Release button, 7... Sheet presser plate, 8... Shaft, 9...
Lock plate, 10...Magnetic sheet, 11...Substrate,
12... Shaft, 13... Fixed base, 14... Lock slide plate, 15... Mounting member, 16... Leaf spring,
18... Spring, 19... Hole.

Claims (1)

[Claims for Utility Model Registration] (1) A turntable is provided on the sheet placement surface of the device body, a magnetic head that moves in the radial direction is provided on the turntable, and one end is rotatably pivoted to the device body. A magnetic sheet is disposed between the sheet pressing plate and the sheet placing surface, and the magnetic head is moved in the radial direction while rotating the turntable. In a magnetic sheet reproducing device configured to trace a spiral track provided on a magnetic sheet, a lock plate is provided at the other end of the sheet holding plate, and a lock slide plate biased in one direction is provided inside the device body. and engaging the lock slide plate with the lock plate when the seat press plate is closed, and always biasing the seat press plate in an open direction;
A magnetic sheet reproducing device in which the sheet pressing plate is mounted at a uniform height with respect to the magnetic head at any position of the magnetic head on the turntable. (2) The magnetic sheet reproducing device according to claim 1, wherein the tip of the locking plate is directly biased by biasing means.