JPH0138773Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a magnetic recording/reproducing device using a flexible magnetic disk cartridge, such as a floppy disk drive device.

Structure of a conventional example and its problems FIGS. 1 and 2 show a conventional flexible magnetic disk cartridge. 1A, B and C show the state when not in use, and FIGS. 2A and B show the state when in use.

In FIGS. 1 and 2, 1 is a case covering the magnetic recording sheet 2;
Recesses 3a and 3b are formed on the upper and lower surfaces of the sides. 4a and 4b are recesses 3a and 3b of case 1
The magnetic head enters through the long holes 4a and 4b and comes into contact with the magnetic recording sheet 2 during recording and reproduction. Reference numeral 5 denotes a shutter that is slidably supported in the recesses 3a and 3b of the case 1, and the shape of the shutter 5 is U-shaped in cross section. Holes 6a and 6b are formed. 7 and 8 are positioning projections formed in the recess 3b of the case 1, and 9 and 10 are holes formed in the bottom plate 5b of the shutter 5. Reference numeral 11 denotes a driving section fixed at the center of the magnetic recording sheet 2, and this driving section 11 is connected to the hole 1 formed in the center of the lower surface of the case 1.
The magnetic recording sheet 2 is exposed from the magnetic recording sheet 2, and the rotational drive mechanism of the recording/reproducing apparatus engages with the drive section 11 to rotate the magnetic recording sheet 2.

FIG. 1 shows a state in which the flexible magnetic disk is not used, and in this state, the shutter 5 moves downward as shown in FIG. 1A (upward in FIG. 1B) and protrudes. 7 and the hole 9 of the shutter 5 are engaged, and the elongated hole 4 formed in the case 1
a and 4b are closed by a shutter 5.

When the shutter 5 is manually slid in the opposite direction (upward in FIG. 1A, downward in FIG. 1B) from the state shown in FIG. 1, a protrusion appears as shown in FIGS. 7 and the hole 9 of the shutter 5 are disengaged, and the protrusion 8 and the hole 10 of the shutter 5 are engaged. In this state, the elongated holes 4a and 4b of the case 1
and the elongated holes 6a and 6b of the shutter 5 respectively coincide with each other, and the magnetic recording sheet 2 in the case 1 is exposed.
The magnetic head can come into contact with the magnetic recording sheet 2 through the long holes 6a and 6b of the shutter 5 and the long holes 4a and 4b of the case 1.

However, in the above conventional example, there is a drawback that the user must open and close the shutter 5 by hand, and the position of the shutter 5 is fixed by using the protrusions 7 and 8 provided on the case 1 and the hole 9 of the shutter 5. , 10, the protrusions 7 and 8 are worn out, making the fixation of the shutter 5 uncertain and causing the shutter 5 to open and close on its own.

3 and 4 show other conventional examples. In FIGS. 3 and 4, 13 is the magnetic recording sheet 1
A case 4 is housed in the case 13, and guide grooves 15 and 16 are formed in the upper and lower sides of the case 13. 17 is a long hole formed on both sides of the case 13; 18 is a drive unit fixed to the center of the magnetic recording sheet 14; 19 is a shutter rotatably supported by the drive unit 18;
The shape of the shutter 19 is U-shaped in cross section.
A magnetic recording sheet 14 is interposed between the opposing parallel upper and lower plates. A flexible belt 20 has one end fixed to the shutter 19, and the other end of the flexible belt 20 is led out to the guide groove 16. Further, an engagement piece 21 is integrally formed at the other end of the flexible belt 20. 22 has case 13 on one end
The other end is attached to the pin 23 inside the flexible belt 2.
The elastic force of this spring 22 urges the flexible belt 20 so that the shutter 19 rotates counterclockwise. 28 is a guide piece that guides the flexible belt 20.

In FIG. 3, reference numerals 24 and 25 are guide bodies of a holder provided in the magnetic recording/reproducing device, and protrusions 2 are provided on opposing surfaces of the guide bodies 24 and 25.
6 and 27 are formed.

Next, the operation of the above embodiment will be explained with reference to FIGS. 5A and 5B. FIG. 5A shows a state in which the flexible magnetic disk cartridge is not inserted into the holder of the magnetic recording/reproducing apparatus. In this state, the third
The shutter 19 is rotated counterclockwise by the elastic force of the spring 22 in the figure.
9 closes the elongated hole 17 of the case 13.

As shown in FIG. 5B, when the flexible magnetic disk cartridge is inserted into the insertion slot of the holder, the protrusions 2 of the holder fit into the guide grooves 15 and 16 of the case 13.
6, 27 are inserted, and the cartridge has protrusions 26, 27.
27 and is inserted. As the cartridge is further inserted, the engaging piece 21 provided at one end of the flexible belt 20 comes into contact with the protruding piece 27. If you insert more cartridges in this state, case 1
3 moves to the right. That is, the engagement piece 21 is pushed to the left relative to the case 13, and the shutter 19 is rotated clockwise via the flexible belt 20, as shown in FIG. 5B. The elongated hole 17 is unclosed and the magnetic head can come into contact with the magnetic recording sheet 14 through the elongated hole 17.

In the above conventional example, the shutter 19 can be opened and closed automatically, but a flexible belt 20 is used, and the protrusion 2
Since the guide grooves 15 and 16 into which the cartridges 6 and 27 are inserted must be formed, the cartridge cannot be made thinner.

Purpose of the invention The present invention aims to eliminate the above-mentioned drawbacks of the conventional technology, and provides a simple structure for a thin flexible magnetic disk cartridge that can automatically open and close the shutter when inserted into or removed from a magnetic recording/reproducing device. It is provided by.

Structure of the Invention In order to achieve the above object, the present invention forms an inclined engagement part on the shutter of a flexible magnetic disk cartridge and engages this inclined engagement part with the engagement drive body of the holder. This is what makes the shutter slide.

An embodiment of the present invention will be described below with reference to FIGS. 6 to 8.

In FIGS. 6 to 8, 30 is a case in which a magnetic recording sheet 31 is housed, and this case 3
A recess 32 is formed on both sides of one side of 0. Reference numeral 33 denotes a driving section fixed at the center of the magnetic recording sheet 31, and this driving section 33 is exposed through a hole 34 formed in the case 30. 35 is a hole formed in the center of the recess 32 of the case 30.
Reference numeral 36 denotes a shutter slidably supported in the recess 32, and the shape of the shutter 36 is U-shaped in cross section, and the opposing upper and lower plates are provided with elongated holes 3.
7 is formed. A spring 38 has one end fixed inside the case 30 and the other end fixed to the shutter 36 through a hole in the side surface of the case 30, and the elastic force of the spring 38 urges the shutter 36 downward. . In this state, the elongated hole 3 of the case 30
5 is closed by a shutter 36. 39
is an arcuate surface formed at the outer corner of the shutter 36.

40 is a holder of a magnetic recording/reproducing device into which the flexible magnetic disk cartridge is inserted;
A fixed arm 41 is provided within this holder 40 . 42 is a roller rotatably supported at the tip of the fixed arm 41.

Next, the operation of the above embodiment will be explained. 6th
7 shows the state in which the shutter 3 is not in use, and in this case, the elastic force of the spring 38 causes the shutter 3 to
6 is urged downward, and the elongated hole 35 of the case 30 is closed by a shutter 36.

When the flexible magnetic disk cartridge is inserted into the holder 40 in the state shown in FIGS. 6 and 7, the arcuate surface 39 of the shutter 36 comes into contact with the roller 42. As the cartridge is further inserted, the shutter 36 is moved upward and the eighth cartridge is inserted.
As shown in the figure, the elongated hole 37 of the shutter 36 matches the elongated hole 35 of the case 30, and the elongated hole 35 is open.
The magnetic head comes into direct contact with the magnetic recording sheet 31 through the elongated hole 37 of the shutter 36 and the elongated hole 35 of the case 30, and recording and reproduction become possible.

When the cartridge is removed from the holder 40 when recording and playback are completed, the shutter 36 returns to the state shown in FIG. 6 due to the elastic force of the spring 38, and the long hole 35 of the case 30 is closed by the shutter 36. be done.

In the above embodiment, the roller 42 is rotatably supported at the tip of the fixed arm 41, but the roller 42 may be rotatably provided on the inner wall of the holder 40 without using the fixed arm 41. be. Further, a protrusion may be provided instead of the rotatable roller 42.

9 to 11 show other embodiments of the present invention. In this embodiment, an inclined elongated hole 43 is formed in the shutter 36 instead of the arcuate surface 39 of the previous embodiment, and when the flexible magnetic disk cartridge is inserted into the holder 40, the roller 42
engages with the inclined elongated hole 43 of the shutter 36, the shutter 36 moves upward, the elongated hole 37 of the shutter 36 matches the elongated hole 35 of the case 30, and the elongated hole 35 of the case 30 opens. .

In this embodiment as well, the roller 42 may be rotatably provided on the inner wall of the holder 40, and furthermore, a protrusion may be provided instead of the roller 42. Further, in this embodiment, the shutter 36
Instead of forming the oblique elongated hole 43, an oblique elongated groove may be formed.

Effects of the invention The present invention has the above-mentioned configuration.According to the invention, the shutter can be opened and closed automatically by inserting and removing the flexible magnetic disk cartridge into the device, and it is possible to open and close the shutter automatically, unlike the conventional example. Since a flexible belt and a guide groove are not necessary, it has the advantage that it can be formed thinly.

[Brief explanation of the drawing]

FIG. 1A is a top view of a conventional flexible magnetic disk cartridge, FIG. 1B is a bottom view of the same, FIG. 1C is a sectional view taken along the line SS in FIG. 1A, and FIG. FIG. 2B is a top view of the same in use, FIG. 3 is a sectional view of another conventional flexible magnetic disk cartridge, FIG. 4 is a side view of the same, and FIGS. 5A and B are 6 is a cross-sectional view of a flexible magnetic disk cartridge used in a magnetic recording/reproducing device according to an embodiment of the present invention and a cross section of the main parts of the device. FIG. 7 is a diagram showing the cartridge and rollers. FIG. 8 is a cross-sectional view of the cartridge inserted into the holder, and FIG. 9 is a cross-sectional view of the main parts of the flexible magnetic disk cartridge and device in another embodiment of the present invention. 10 is a side view of the cartridge and the roller section, and FIG. 11 is a sectional view of the cartridge inserted into the holder. 30...Case, 31...Flexible magnetic sheet,
32... recess, 33... drive section, 34... hole, 3
5... Long hole, 36... Shutter, 37... Long hole, 38... Spring, 39... Arc surface, 40... Holder, 41... Fixed arm, 42... Roller,
43...Slanted long hole.

Claims (1)

[Scope of utility model registration request] A shutter in which a magnetic recording sheet is housed and has a first elongated hole and a second elongated hole is slidably supported, and the shutter has an arcuate surface, an inclined surface,
A case for a magnetic recording sheet in which an inclined engagement part such as an inclined elongated hole or an inclined elongated groove is formed, and an arm that is attached parallel to the direction in which the case is inserted into a holder and whose tip roller abuts the inclined engagement part. and a magnetism characterized in that when the case is inserted into the holder, the inclined engaging portion is engaged with the arm, thereby causing the shutter to slide with a component force in the right angle direction. Recording and playback device.