JPH05174559A - Front panel of recording and/or reproducing apparatus - Google Patents

Abstract

PURPOSE:To positively prevent the invasion of dust into an apparatus by providing two shutters which shut an insertion opening before and when a cartridge is mounted. CONSTITUTION:While a cartridge is not mounted, a first shutter 8 shuts an insertion opening 2 at a front panel 3. Cartridges are inserted or removed through the insertion opening 2. Moreover, a second shutter 14 provided at the front panel 3 shuts the insertion opening 2 in association with the loading motion of a cartridge. In this constitution, before the cartridge is mounted, the first shutter 8 always clogs the insertion opening 2 by a torsion coil spring 13. Meanwhile, when the cartridge is installed, the second shutter 14 is raised by a tension coil spring 20 and a pair of lifting arms 18, 19 coupled to a lifting plate 17 which descends along with the cartridge, thereby shutting the insertion opening 2 to prevent dust.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to recording and reproducing information signals on and from a recording medium such as a magnetic tape, an optical disc or a magneto-optical disc, which is loaded with a cartridge. And / or a front panel in a playback device.

[0002]

2. Description of the Related Art Conventionally, for example, the front of a recording and / or reproducing apparatus configured to record and / or reproduce an information signal with respect to a magnetic tape, an optical disk or a magneto-optical disk housed in a cartridge. In the panel, a shutter is rotatably attached to the front panel in order to prevent dust from entering the device.

In such a shutter, a coil coil spring or the like twists the front panel so that the cartridge insertion / removal opening provided in the front panel is always closed before the cartridge is mounted. Therefore, in the state before the cartridge is attached to the recording and / or reproducing apparatus, the cartridge insertion / removal opening is closed,
Dust is prevented from entering the device.

However, when the cartridge is mounted on the recording and / or reproducing apparatus, the lower end of the shutter is set on the upper surface of the cartridge so that the cartridge insertion / removal opening provided on the front panel is opened. Has become. That is, in the state where the cartridge is not mounted, the shutter closes the cartridge insertion / removal opening to surely prevent dust from entering the device, but after the cartridge is mounted, the cartridge insertion / removal opening is opened. In this state, dust is allowed to enter the device.

As described above, since the conventional shutter cannot close the cartridge insertion / removal port when the cartridge is mounted, the recording / reproducing device is used particularly in a dusty place. Playback is hindered and good recording / playback cannot be expected.

[0006]

Therefore, the present invention has been proposed in view of the above-mentioned conventional technical problems, and it is possible to close the cartridge insertion / ejection opening even when the cartridge is mounted. An object of the present invention is to provide a front panel in a recording and / or reproducing apparatus which is excellent in dustproof measures.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to a front of a recording and / or reproducing apparatus for loading a cartridge containing a recording medium to record and / or reproduce an information signal on the recording medium. In the panel,
A first shutter that closes a cartridge insertion / removal port provided on the front panel when the cartridge is not mounted on the front panel, and a second shutter that closes the cartridge insertion / removal port in association with a cartridge loading operation. The shutter is provided.

[0008]

According to the present invention, when the cartridge is not mounted on the front panel, the first shutter for closing the cartridge insertion / removal opening provided on the front panel and the cartridge insertion operation in association with the loading operation of the cartridge. Since the second shutter for closing the opening is provided, the cartridge insertion opening is in a closed state both before the cartridge is mounted and when the cartridge is mounted, and dust is prevented from entering the apparatus body. To be prevented. Therefore, excellent recording / reproducing of information signals can be performed on the recording medium housed in the cartridge.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments to which the present invention is applied will be described in detail below with reference to the drawings. It should be noted that the present embodiment is an example applied to a recording and / or reproducing apparatus for performing recording and reproduction on a magneto-optical disk.

In this recording and / or reproducing apparatus, as shown in FIG. 1, a cartridge is mounted in a predetermined cartridge mounting portion in an apparatus main body 1 indicated by a chain double-dashed line.
A loading mechanism that mounts a magneto-optical disk rotatably housed in a cartridge onto the disk table of a disk rotation operating device, and a radial direction across the inner and outer circumferences of the magneto-optical disk that is mounted and rotated on the disk table. An optical pickup device which is transferred and records / reproduces an information signal on / from the magneto-optical disk, and a magnetic head device which applies an external magnetic field when an information signal is recorded on the magneto-optical disk (both not shown). ) And is built in.

A front panel 3 having a cartridge insertion / removal opening 2 for inserting a cartridge into the apparatus body 1 is provided on the front side of the apparatus body 1.
The front panel 3 is, as shown in FIGS. 2 and 3,
It is formed as a resin molded body having a planar rectangular shape that is large enough to cover the front surface of the apparatus body 1. The front panel 3 is engaged with a groove provided in the device main body 1 at both side edges in the short side direction of the front panel 3 to attach the front panel 3 to the device main body 1.
There are provided a pair of panel mounting pieces 6 and 7 having claw portions 4 and 5 for mounting on the ends thereof. Further, the front panel 3 is provided with a cartridge insertion / removal opening 2 for inserting the cartridge into the apparatus main body 1, and the cartridge insertion / removal opening 2 allows the cartridge to be taken in and out. The cartridge insertion / removal opening 2 is
It is provided near the upper edge in the long side direction as an opening having a planar rectangular shape with a size sufficient for inserting the cartridge.

The front panel 3 is provided with a first shutter 8 for closing the cartridge insertion / removal opening 2 provided in the front panel 3 when the cartridge is not mounted. The first shutter 8
Is formed as a plate-like body having a planar rectangular shape with a size large enough to cover the cartridge insertion / removal opening 2, and is provided with holes 9 and grooves 10 provided in the front panel 3 at both ends which are upper end edges in the longitudinal direction. Together, it has a pair of support shafts 11 and 12 for rotatably supporting the shutter 8. A torsion coil spring 13 is attached to one of the support shafts 11 and 12 so that the first shutter 8 is constantly urged toward the front panel 3 by the torsion coil spring 13. Is becoming That is, one end 13a of the torsion coil spring 13 is fixed to the back surface 8a of the shutter 8 opposite to the front panel 3, and the other end 13b is in contact with the inner wall surface 3a of the front panel 3. As a result, the first shutter 8 is attached to the front panel 3
Always urged to the side. Therefore, when the cartridge is not mounted, the cartridge insertion / removal opening 2 is always closed by the first shutter 8.

Further, the front panel 3 is provided with a second shutter 14 which closes the cartridge loading / unloading opening 2 in association with the loading operation of the cartridge. The second shutter 14 is made of a transparent resin molded body having a substantially rectangular shape in plan view that is large enough to close the cartridge insertion / removal opening 2.
3 is formed by slidably engaging both end edges with guide grooves 15 and 16 provided on both side edges in the short side direction of FIG.
It can be moved up and down in the direction of the middle arrow Y. The second shutter 14 is configured to close the cartridge loading / unloading opening 2 in association with the loading operation of the cartridge by a shutter elevating mechanism, which will be described later, provided on the front panel 3.

The shutter elevating / lowering mechanism includes an elevating / lowering plate 17 which descends together with the cartridge inserted into the apparatus main body 1 through the cartridge insertion / removal opening 2 when the cartridge is lowered to the cartridge mounting portion by the loading mechanism. The lift plate 17 is connected to the lift plate 17.
When a pair of raising and lowering arms 18 and 19 that raises the second shutter 14 to the cartridge insertion / removal opening 2 are interlocked with the pair of raising and lowering arms 18 and 19 and a tension coil spring 20 stretched between them. It is configured.

As shown in FIG. 4, the elevating plate 17 is provided at the rear of the cartridge when the cartridge inserted into the apparatus main body 1 from the cartridge insertion / removal opening 2 is lowered to the cartridge mounting portion by the loading mechanism. It has a cartridge support portion 21 that supports the edge portion. The cartridge support portion 21 is formed as a plate-like body having a rectangular shape in plan view, and has a hemispherical projection 22 which is in a point contact state with the cartridge at a substantially central portion thereof. Therefore, the cartridge is in point contact with the cartridge support portion 21. A pair of arm mounting portions 23 and 24 that engage with pins crimped to a pair of elevating arms 18 and 19, which will be described later, are provided at one longitudinal edge of the cartridge supporting portion 21. The arm attachment portions 23 and 24 are provided at both longitudinal end portions of the cartridge support portion 21 so as to hang down along the one side edge. Such arm attachment part 2
3 and 24 are provided with elongated hole-shaped pin engaging holes 25 and 26, respectively, into which pins crimped to the elevating arms 18 and 19 are engaged.

On the other hand, the elevating arms 18 and 19 are made of a metal plate which is punched into a substantially V shape in plan view, and are made of a metal plate which is attached to the inner wall surface 3a of the front panel 3 with a predetermined gap. A pair of arm support pins 28 and 29 axially fixed to the chassis 27 are attached so as to be rotatable in the directions of arrows A and B in FIG. The arm support pins 28 and 29 are pins having a circular flange portion at the tip end thereof, and the lift plate 17
Is fixed to the chassis 27 by caulking the base end portion of the notch 42, which is notched in the vertical movement range, at the opening peripheral edge.

In the first arm portions 30 and 31 of the elevating arms 18 and 19 having a short length, the pin engaging holes 2 provided in the arm attaching portions 23 and 24 of the elevating plate 17 are provided.
The first pins 32 and 33 that engage with the motors 5 and 26 are axially fixed. Each of the first pins 32 and 33 is a pin having a circular flange portion whose front end portion is larger than the size of the pin engaging holes 25 and 26, and the base end portion of the first pin 32 and 33 is formed on the arm portion 30 or 31. By being caulked, it is axially fixed to the first arm portions 30 and 31. Further, small circular holes 34 and 35 are provided on the tip side of the first arm portions 30 and 31, and the hook portions of the tension coil spring 20 are locked in the holes 34 and 35 so that the tension coil spring 20 is stretched. It is provided in a suspended state.

Further, the second arm portions 36 and 37 having long lengths of the elevating arms 18 and 19 are engaged with the elevating holes 38 and 39 provided in the second shutter 14, respectively. The second pins 40 and 41 are locked. This second
The pins 40 and 41 are cylindrical pins, and are axially fixed to the tip ends of the second arm portions 36 and 37.
The inner wall surface 3a of the front panel 3 facing the second pins 40 and 41 is provided with pin escape grooves 43 and 44 having an arc shape corresponding to the rotation locus of the second pins 40 and 41. Has been. The pin escape grooves 43, 44 open the vertical displacement of the second shutter 14, that is, the top dead center position where the second shutter 14 completely closes the cartridge insertion / removal opening 2 and the cartridge insertion / removal opening 2. It is for controlling the bottom dead center position.

As described above, the lifting plate 17, the lifting arm 18,
The chassis 27 provided with the shutter elevating mechanism composed of 19 and the tension coil spring 25 has circular or rectangular projections 45 and 46 formed on the lower end side of the inner wall surface 3a of the front panel 3, respectively. The fitting holes 47 and 48 of the above are faced to the inner wall surface 3a so as to have a predetermined gap. In this embodiment, an adhesive is applied to cover the rectangular protrusions 45, so that the chassis 27 is securely fixed to the front panel 3.

Front panel 3 constructed as described above
A recording and / or reproducing apparatus having a cartridge 4
The operation of the first shutter 8 and the second shutter 14 that closes the cartridge insertion / ejection opening 2 provided on the front panel 3 when the 9 is attached will be described. When the cartridge 49 is not attached, the first shutter 8
Is in a state in which the cartridge insertion / removal opening 2 is closed by the elastic force of the torsion coil spring 13. Therefore, in the state before recording and reproduction, the first shutter 8 prevents dust from entering the main body 1 of the apparatus.

On the other hand, the second shutter 14 has a tension coil spring 25 stretched between a pair of lifting arms 18 and 19.
The second pin 40, 41 axially fixed to the tip of the second arm portion 36, 37 is pulled by the pulling force of the
It is provided below the cartridge insertion / removal opening 2 by being positioned below. At this time, the lift plate 17 is in a state of being held at a position substantially flush with the lower end edge portion 2a of the cartridge insertion / removal opening 2.

From the cartridge insertion / removal opening 2 to the cartridge 4
When 9 is inserted, the first shutter 8 rotates as shown in FIG. 5 against the torsion coil spring 13 provided on the first shutter 8, and the cartridge insertion / ejection opening 2 is exposed. At this time, the cartridge 49 is drawn into the apparatus main body 1 by the loading mechanism while slidingly contacting the protrusion 22 provided on the elevating plate 17. In this state, the second shutter 14 is in the same state as that in which the cartridge 49 is not mounted, that is, the tension coil spring 20 stretched between the pair of lifting arms 18 and 19 as shown in FIG. The second pins 40, 4 axially fixed to the tips of the second arm portions 36, 37 by the pulling force.
1 is located below the front panel 3 so that it is provided below the cartridge insertion / ejection opening 2.

When the cartridge 49 is completely inserted into the apparatus main body 1, this time the cartridge 49 is lowered to the cartridge mounting portion in the direction of arrow C in FIG. 7 by the loading mechanism. At this time, the first shutter 8 is in a state of resting on the upper end surface 49a of the cartridge 49, and the cartridge insertion / removal opening 2 is open. The lifting plate 1 that supports the rear edge of the cartridge 49 as the cartridge 49 descends.
7 resists the elastic force of the stretched tension coil spring 25 and descends together with the cartridge 49 as shown in FIG. At this time, the first pins 28, 2
Since a pair of elevating arms 18 and 19 are connected via 9 the elevating arms 18 and 19 are in the directions of arrows E and F in the figure with arm support pins 28 and 29 axially fixed to the chassis 27 as fulcrums. Rotate. As a result, the lifting arm 1
The second shutter 1 engaging with the second pins 40 and 41 axially fixed to the distal ends of the second arm portions 36 and 37 of the reference numerals 8 and 19.
4 moves up in the direction D in the figure by the distance that the lifting plate 17 descends as the lifting arms 18 and 19 rotate. That is, at the same time when the lowering operation of the cartridge 49 is started, the second shutter 14 is started to move up in conjunction with this, and the cartridge insertion / removal opening 2 is closed.
Then, the second shutter 14 is raised by an amount corresponding to the descending distance of the cartridge 49, and gradually closes the cartridge insertion / removal opening 2.

Then, when the cartridge 49 is finally mounted in the cartridge mounting portion in the apparatus main body 1, the first shutter 8 is placed on the upper end surface 49a of the cartridge 49 as shown in FIG. There is a second shutter 1
4 is further raised to completely close the cartridge insertion / ejection opening 2 as shown in FIG. Therefore, even when the cartridge 49 is mounted in the cartridge mounting portion, the cartridge insertion / removal opening 2 can be closed by the second shutter 14, and the intrusion of dust into the apparatus main body 1 can be reliably prevented. Further, since the shutter elevating mechanism described above is housed in the front panel 3, the space in the apparatus body 1 is not restricted.

Although the present embodiment is applied to the front panel of the recording and / or reproducing apparatus for recording / reproducing on / from the magneto-optical disk, the recording / reproducing on / from the video tape recorder or the optical disk. And / or it can be applied to the front panel of the reproducing apparatus, and the same effect can be obtained.

[0026]

As is apparent from the above description, according to the present invention, when the cartridge is not mounted, the first shutter for closing the cartridge insertion / removal opening provided on the front panel, and the cartridge Since the front panel is provided with the second shutter that closes the cartridge insertion / removal port in association with the loading operation, the cartridge insertion / removal port is closed not only before the mounting of the cartridge but also during the moment when the cartridge is inserted. Therefore, it is possible to reliably prevent dust from entering the device body. Therefore, excellent recording / reproducing of information signals can be performed on the recording medium housed in the cartridge.

Further, according to the present invention, since the mechanism for moving up and down the first shutter and the second shutter is housed in the front panel, the space in the main body of the apparatus can be used without waste and recording and / or recording can be performed. It is possible to significantly reduce the size of the playback device.

[Brief description of drawings]

FIG. 1 is a perspective view showing a front panel in a recording and / or reproducing apparatus to which the present invention is applied.

FIG. 2 is an exploded perspective view of the front panel when disassembled and viewed from the front side thereof.

FIG. 3 is an exploded perspective view of a state in which the front panel is disassembled and viewed from the back side thereof.

FIG. 4 is a perspective view of a lift plate.

FIG. 5 is a side view showing a state where the cartridge is inserted into the main body of the apparatus up to an intermediate position thereof.

FIG. 6 is a rear view showing a state where the cartridge is inserted into the main body of the apparatus up to an intermediate position thereof.

FIG. 7 is a side view showing a state in which the cartridge is completely inserted into the apparatus main body.

FIG. 8 is a rear view showing a state in which the cartridge is completely inserted into the apparatus main body.

FIG. 9 is a side view showing a completed mounting state of the cartridge in the cartridge mounting portion.

FIG. 10 is a rear view showing a state where the cartridge is completely mounted in the cartridge mounting portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Device main body 2 ... Cartridge insertion / removal port 3 ... Front panel 8 ... First shutter 14 ... Second shutter 17 ... Elevating plate 18, 19 ... Elevating arm 27 ... Chassis 32,33 ... First pin 40,41 ... Second pin

Claims (1)

[Claims] 1. A front panel of a recording and / or reproducing apparatus which loads a cartridge containing a recording medium and records and / or reproduces an information signal on the recording medium, wherein the front panel is A first shutter that closes the cartridge insertion / removal port provided on the front panel when the cartridge is not mounted and a second shutter that closes the cartridge insertion / removal port in association with the loading operation of the cartridge are provided. A front panel in a recording and / or reproducing apparatus, characterized in that