JPH0138774Y2 - - 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. A shutter 5 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 one end as case 13
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 eliminates the above-mentioned drawbacks of the conventional technology, and provides a thin magnetic recording/reproducing device with a simple structure that can automatically open and close the shutter when inserted into or removed from the magnetic recording/reproducing device. It is provided by.

Structure of the Invention In order to achieve the above object, the present invention includes a shutter that is slidably supported in a cartridge case, a rotating arm that is provided on the holder into which the cartridge is inserted, and a rotating arm that moves when the cartridge is inserted. The shutter is slid by the rotation of the shutter.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below in Figures 6 to 9.
This will be explained with figures.

In FIGS. 6 to 9, 30 is a case that stores the magnetic recording sheet 31, and this case 30
A recess 32 is formed on one side of the . 33 is a long hole formed in the center of the recess 32, and 34 is a step formed at the edge of the recess 32. A shutter 35 is slidably supported in the recess 32 of the case 30. The shutter 35 has a U-shaped cross section, and has long holes 3 in the opposing upper and lower surfaces.
6 is formed. Reference numeral 37 denotes a notched engagement portion formed at one end of the side edge of the shutter 35. 38
is a spring whose one end is attached to the shutter 35 and the other end is attached to a pin 47 inside the case 30, and this spring 38 causes the shutter 35 to
7, in the direction of arrow X (case 30
direction in which the elongated hole 33 is closed by the shutter 35)
is energized by Reference numeral 39 denotes a driving section fixed to the center of the magnetic recording sheet 31, and this driving section 3
9 is exposed through a hole 40 formed in the case 30.

In FIG. 6, reference numeral 41 denotes a rotating arm rotatably supported within a holder 46, and this rotating arm 41 is rotatably supported on a shaft 42.
43 is a protrusion formed integrally with the rotating arm 41;
44 is a roller rotatably supported at the free end of the rotating arm 41, and 45 is a spring that biases the rotating arm 41 in the counterclockwise direction.

When the cartridge is inserted into the holder 46 in the Y direction from the state shown in FIG.
7 is engaged with the roller 44 of the rotating arm 41. When the cartridge is further inserted in the Y direction in this state, the rotating arm 41 rotates clockwise, causing the shutter 35 to slide upward. As the cartridge is further inserted, the elongated hole 36 of the shutter 35
corresponds to the long hole 33 of the case 30, and the magnetic head corresponds to the long hole 36 of the shutter 35 and the long hole 3 of the case 30.
3, the magnetic recording disk 31 can be directly contacted. In this state, the magnetic recording disk 31
Recording or playback is performed. When the cartridge is removed from the holder after recording and playback is completed, the shutter 35 is slid downward by the elastic force of the spring 38, and the case 30 is moved as shown in FIG.
The long hole 33 is closed, and the rotating arm 41 is rotated counterclockwise by the elastic force of the spring 45, returning to the state shown in FIG.

In the above embodiment, in order to prevent the shutter 35 from coming off, a protrusion is formed on the inner surface of the shutter 35, a linear guide groove is formed in the recess 32 of the case 30, and the protrusion of the shutter 35 is What is necessary is to insert it into the guide groove of the case 30.

Effects of the invention The present invention has the above-mentioned configuration. According to the invention, the shutter can be opened and closed automatically as the cartridge is inserted into and removed from the holder, and the flexible belt, guide groove, etc. Since this is not necessary, it has the advantage that the cartridge can be made thinner.

[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 cross-sectional view of the same cartridge. FIG. 8 is a sectional view of the cartridge inserted into the holder, and FIG. 9 is a sectional view of the cartridge. 30... Case, 31... Magnetic recording sheet, 3
2... recess, 33... long hole, 34... step, 35
... Shutter, 36 ... Long hole, 37 ... Notch engaging portion, 38 ... Spring, 39 ... Drive section, 40 ...
Hole, 41... Rotating arm, 42... Axis, 43...
Projection, 44...Roller, 45...Spring, 46...
Holder, 47...pin.

Claims (1)

[Scope of utility model registration request] A magnetic recording sheet case that houses a magnetic recording sheet, slidably supports a shutter having a first elongated hole and a second elongated hole, and has a notch engaging portion formed in the shutter. and a rotating arm that is rotatably supported by a holder into which the case is inserted and which is locked to one side of the holder by means of a human-shaped protrusion, and the case is inserted into the holder. When the case is inserted, the free end of the rotary arm is engaged with the notch engagement portion of the shutter, and the shutter is slid by the rotation of the rotary arm as the case is inserted. Magnetic recording and reproducing device.