JPH11273212A - Recording and reproducing device and video camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dust from entering from an insertion port and to prevent the ejection of a recording medium due to an erroneous operation by providing a dustproof door opening and closing the insertion port of the recording medium and arranging a manual ejecting switch at the inside of a door closing position. SOLUTION: A dustproof door 21 opening and closing the insertion port 11 of a recording medium from the outside is freely rotatably attached to a device with a hinge mechanism 22. At the time of loading a disk cartridge, after the door 21 is opened to a door opening position P12 and the cartridge is inserted to be loaded into the device, a recording or a reproducing is performed by closing the door 21. When a photographing operation is performed in a state in which the door is opened, while detecting the open/close state of the door 21 is detected by a detecting sensor 27, and the closing of the door 21 is requested with a warning and/or an alarm. Thus, the recording or the reproduction is performed while preventing dust from entering from the port 11 in a state in which the port 11 is surely closed with the door 21 and also it is eliminated that the ejecting switch 26 being in the in-side of the door closing position is erroneously touched and the ejection of the cartridge is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium such as a disk cartridge,
In the technical field of a recording / reproducing apparatus which is most suitable for being applied to a video camera which records and / or reproduces on the recording medium, in particular, in order to ensure dustproofness and operability of an insertion port for inserting a recording medium. Technology.

[0002]

2. Description of the Related Art Conventionally, in a recording / reproducing apparatus such as a video tape recorder or a disk device, an inward-opening type shutter is attached to an insertion opening of a tape cassette or a disk cartridge, and a double insertion of a tape cassette or a disk cartridge is performed. In any case, dust is easily introduced into the recording / reproducing device through the gap of the insertion slot because the shutter structure is simple and the shutter has almost no dust-proof performance. It was easy to do. In a recording / reproducing apparatus such as an optical disk apparatus which records and / or reproduces data on a recording medium such as an optical disk in a non-contact manner by an optical pickup, dust or the like that has entered the surface of the recording medium or an objective of the optical pickup. If it adheres to the surface of the lens or the like, it becomes a factor that significantly deteriorates the reliability of data recording and / or reproduction, and therefore, dust prevention measures are particularly necessary.

Accordingly, the applicant of the present invention has disclosed in
According to the prior invention of the recording / reproducing apparatus described in Japanese Patent Application Laid-Open No. 89960, a lid which opens and closes the insertion opening from the outside is provided to prevent dust and the like from entering from the insertion opening. I have. In this prior invention, the eject switch is arranged inside the insertion slot, and the lid is opened outward, so that the eject switch can be operated by the lid to eject the tape cassette, and the lid is opened. Just to make it easy to eject the tape cassette.

[0004]

In the prior invention, however, in order to operate the eject switch by opening / closing the lid, for example, it is necessary to open the lid inadvertently during data recording and reproducing operations. In some cases, the tape cassette is inadvertently ejected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to prevent dust and the like from entering from an insertion port of a recording medium and to prevent ejection of the recording medium due to an erroneous operation. It is an object of the present invention to provide a recording / reproducing apparatus capable of performing the following.

[0006]

A recording / reproducing apparatus according to the present invention for achieving the above object is provided with a dustproof door for opening and closing a recording medium insertion opening, and a dustproof door disposed inside a closed position of the dustproof door. And an eject switch which can be manually operated by opening the dustproof door.

In the recording / reproducing apparatus of the present invention configured as described above, if the dust-proof door is closed, it is possible to prevent dust and the like from entering from the insertion port and to disable manual operation of the eject switch. When the dustproof door is opened, the eject switch can be operated manually.
When ejecting a recording medium, the user must open the dust-proof door and then manually operate the eject switch consciously.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a recording and reproducing apparatus in which the present invention is applied to a video camera will be described below with reference to the drawings.

"Overview of Video Camera" First, FIGS.
FIG. 11 explains the outline of the video camera 1. A camera body 4 is arranged at a rear portion of a photographing camera unit 3 including a photographing lens 2 and a color image pickup device (not shown). A battery 5 serving as a power supply is detachably mounted at a position deviated to one side at the rear of the camera body 4. And. A disk unit 8 which is an example of a recording / reproducing apparatus for recording and / or reproducing video information on the optical disk 6 by mounting a disk cartridge 7 which is a recording medium containing an optical disk 6 which is a disk in the camera body 4. Is built-in.

At the rear end of the exterior part 4a of the camera body 4 and on the lateral side of the battery 5, there is provided a vertical elongated part for inserting and ejecting the disk cartridge 7 in a vertical posture from the directions of arrows a and b. An insertion port 11 formed in a hole shape is formed. The disk device 8 incorporated in the camera body 4 has a vertical mechanical deck 12, and a vertical mechanical deck 12 is provided outside the mechanical deck 12.
Cartridge loading mechanism 1 having cartridge holder 13a with automatic cartridge retraction function
3. A spindle motor 14 having a disk table, an optical pickup 15, a cartridge positioning pin 16 and the like are mounted. Inside the mechanical deck 12, a vertical circuit board 17 on which circuits such as control and signal processing systems are mounted. Is incorporated. Then, the cartridge holder 13a of the cartridge loading mechanism 13 between the insertion position P ₁ facing the front in the insertion port 11 the insertion position P ₁ from the one side (the mechanical deck 12 side) offset has been mounted position P ₂ and the It is configured to be loaded and / or unloaded by parallel movement in the directions of arrows c and d. The insertion opening 11 is formed in the inner guide 18.

When the disk cartridge 7 is mounted, as shown in FIG.
The inserted from the insertion port 11 in the arrow a direction, which is forward in a vertical position, as indicated by a dotted line in FIG. 10, draws in the direction of arrow a to the insertion position P ₁ in the cartridge holder 13a.
After the cartridge is retracted, the cartridge holder 13 is moved by the cartridge loading mechanism 13.
by loading a direction of the arrow c, as shown by the solid line in FIG. 10, and simultaneously positioning a plurality of cartridge positioning pins 16 by mounting the disc cartridge 7 to the mounting position P _2, the optical disk 6 of the spindle motor 14 disk Attach it on the table. The optical spot of the laser beam is focused on the optical disk 6 by the objective lens 15a of the optical pickup 15 while the optical disk 6 is rotated at a high speed by the spindle motor 14, and the optical spot is focused on the optical disk 6 from the center. So as to simultaneously record and / or reproduce video information, such as video, audio, and characters, captured by the camera unit 3 on the optical disc 6 in a non-contact manner while seeking in the directions of the arrows g and h. I have.

At the time of ejecting the disc cartridge 7 after recording and / or reproduction of the optical disc 6, when an eject switch described later is pressed, the cartridge holder 1 is operated by the cartridge loading mechanism 13.
3a and in unloading direction of the arrow d, after unloading direction of arrow d from the attachment position P ₂ to the insertion position P ₁ indicated by a dotted line indicated by the solid line a disc cartridge 7 in FIG. 11, insert the disc cartridge 7 opening It is configured to eject (discharge) from 11 to the outside in the direction of arrow b.

"Description of the gist of the present invention" Next, the gist of the present invention will be described with reference to FIGS. 1 to 4 and FIGS. An opening 20 is formed behind the opening 11, and a dustproof door 21 that opens and closes the opening 20 to open and close the insertion opening 11 from outside is attached. The dustproof door 21 has a hinge mechanism 2 provided at an outer end thereof.
2, the cover part 4a is rotatably attached in the directions of arrows e and f, and the opening and closing urging means 23 such as a leaf spring incorporated in the hinge mechanism 22 is used to open and close the direction of arrow e. It is configured to be able to switch to the direction of the arrow f, which is the direction, to urge the rotation. As shown in FIG. 1 and FIG.
Are attached to the exterior part 4a, and the opening / closing biasing means 23 has first and second positions at two locations along the outer periphery of the hinge mechanism 22.
Second elastic pressing portions 23a and 23b are provided. The dustproof door 21 is provided with first and second pressed portions 21a and 21b at two locations along the outer periphery of the hinge mechanism 22, and the first and second elastic members of the opening / closing biasing means 23 are provided. The first and second dustproof doors 21 are pressed by the pressing portions 23a and 23b.
Approximately midway of the pressed portion 21a, 21b of the arrow E, by resiliently pressed alternately in the direction F, the opening angle between the dust-proof door 21 in the closed position P ₁₁ and the lid opening position P ₁₂ theta and the point P ₁₃ to the dead center arrow e, to rotate urged switched to f direction (to perform the reversing operation of the rotational bias) is configured to allow. Note that a recording medium confirmation window 24 made of a transparent synthetic resin, glass, or the like is fitted into the dustproof door 21 so as to face the insertion opening 11.

Then, by opening the dustproof door 21 in the direction of arrow f, the eject switch 26, which can be operated manually, is connected to the inner guide 18 at the side of the insertion slot 11.
And is arranged inside the dustproof door 21. A push button 26a for manual operation is attached to the front of the eject switch 26. Further, an open / closed state detection sensor 27, which is a means for detecting the open / closed state of the dustproof door 21, is attached to a position near the hinge mechanism 22 inside the exterior part 4a. The open / closed state detection sensor 27 is configured by a photosensor including a photocoupler 27a attached to the exterior part 4a and an optical shutter plate 27b that rotates integrally with the dustproof door 21. Then, a warning (WARNING) and / or
Alternatively, display means (not shown) for displaying an alarm (ALARM) is provided on a control panel or the like of the video camera 1.

Therefore, according to the video camera 11 of the present invention, first, as shown in FIGS. 1 and 2, the insertion port 11 and the eject switch 26 can be opened and closed from the outside by the dustproof door 21. Figure 1
When the dustproof door 21 is closed as shown in FIG.
3, the first elastic pressing portion 23a elastically presses the first pressed portion 21a of the dustproof door 21 in the direction of the arrow E, so that the dustproof door 21 is actuated with a lid closing bias, and this dustproof use the door 21 is rotationally urged in the arrow e direction to a closed position P ₁₁ about the hinge mechanism 22, the direction of an arrow e in the dustproof door 21 is the exterior portion 4a by the preload force its closed biasing force The opening 20 is elastically pressed and closed in a highly airtight state. Therefore, in this closed state, the insertion port 1
1 and the eject switch 26 are closed from the outside by the dustproof door 21, so that dust and the like can be prevented from entering the disk device 8 from the insertion opening 11, and the high dustproofness in the disk device 8 can be improved. At the same time
The eject switch 26 cannot be manually operated from outside. In this closed state, the photo-coupler 27a is turned off by the optical shutter plate 27b of the dustproof door 21.
The state is switched to the FF state, and the open / close state detection sensor 27
Detects the closed state of the dustproof door 21.

Next, when manually opening the lid the dust door 21 from the closed position P ₁₁ shown in FIG. 1 in the arrow f direction about the hinge mechanism 22, substantially the dustproof door 21 of the opening angle θ until it reaches the midpoint P _13, the first closing biasing means 23
The rotation urging force in the direction of arrow e is acting on the dustproof door 21 by the elastic pressing portion 23a of the dustproof door 21.
Elastically press the but substantially the intermediate point P ₁₃ from the moment that overcome the arrow f direction of opening energizing means 23 and the second second pressed portion 21b of the elastic pressing portions 23b is dustproof door 21 in the direction of the arrow F The rotation urging direction of the dustproof door 21 by the opening / closing urging means 23 is reversed, and the dustproof door 2
1 opens the urging force. Accordingly, the at the time of lid opening, automatically in the direction of the arrow f from the moment the dust door 21 over the substantially intermediate point P ₁₃ to the lid opening position P ₁₂ shown in FIG. 2 dustproof door 21 by the opening and closing biasing means 23 The opening 20 is opened by being urged to rotate, and the outside of the insertion slot 11 and the eject switch 26 is opened.
1 is stabilized by the lid opening position P _12. In this open state, it becomes possible to insert the disk cartridge 7 into the disk device 8 from the insertion opening 11, and at the same time,
The push button 26a of the eject switch 26 can be manually operated from the outside, and the eject operation of the disc cartridge 7 from within the disc device 8 can be performed. In this open state, the photocoupler 27a is switched to the ON state by the optical shutter plate 27b of the dustproof door 21, and the open / closed state detection sensor 27 detects the open state of the dustproof door 21.

Further, when closed manually dustproof door 21 from the lid opening position P ₁₂ shown in FIG. 2 in the direction of an arrow e around the hinge mechanism 22, the dustproof door 21 is the opening angle θ
Until approximately reaches the middle point P ₁₃ of, but biasing force open the lid a rotational biasing force of the arrow f direction by the second elastic pressing part 23a in the dust-proof door 21 in the closing biasing means 23 is acting , first the first direction of arrow E the pressed part 21a of the elastic pressing portion 23a dustproof door 21 closing biasing means 23 from the moment the dust door 21 is almost beyond the midpoint P ₁₃ in the direction of arrow e The direction of rotation of the dustproof door 21 by the opening / closing urging means 23 is reversed from the opening urging force to the closing urging force.
There is urged automatically rotated in the direction of an arrow e by closing biasing means 23 to the closed position P ₁₁ shown in FIG. 1, the dustproof door 21 is to be stabilized at its closed position P _11. Therefore, when the dustproof door 21 is manually opened and closed in the directions of the arrows e and f by manually opening and closing the opening and closing angle θ by approximately an angle θ / 2, the dustproof door by the opening and closing urging means 23 is provided. 21 is automatically reversed, the dustproof door 21 can be automatically opened and closed by the opening / closing biasing means 23 for the remaining angle θ / 2 of approximately 1/2. The door 21 can be easily opened and closed. Moreover, by the dust door 21 arrow e, rotationally urged automatically reversed in direction f by the closing biasing means 23, closed position P ₁₁ of the dust-proof door 21 and the lid opening position P ₁₂ In the closed state, the disk drive 8
When the lid is opened, the dustproof door 21 does not hinder the insertion and ejection of the disc cartridge 7 from the insertion slot 11 and the insertion and ejection of the disc cartridge 7 is easy. Can be done.

[0018] Therefore, when explaining the operation procedure of the video camera 1 of the present invention, first, at the time of loading of the disk cartridge 7, as shown in FIG. 2 and FIG. 9, the arrows f dustproof door 21 to lid opening position P ₁₂ After the cover is opened in the direction, the disc cartridge 7 is inserted from the insertion port 11 in the direction of arrow a,
As shown by the dotted line in FIG. 10, it draws in the direction of arrow a to the insertion position P ₁ in the interior of the cartridge loading mechanism 13. Then, after pulling the cartridge, the disc cartridge 7 by the cartridge loading mechanism 13 is loaded in the direction of arrow c, it is mounted to the mounting position P ₂ shown by the solid line in FIG. 10.

Therefore, after the disk cartridge 7 is mounted, the dustproof door 21 is closed as shown in FIGS. 1 and 10 so that the video information is taken by the video camera 1 and the optical disc of the taken video information is taken. 6. Recording and / or playback of the dust-proof door 6 is started, but since the closed state of the dust-proof door 21 is detected by the open / closed state detection sensor 27, an attempt is made to start shooting with the dust-proof door 21 accidentally opened. Then, a warning and / or an alarm informs the photographer that the dustproof door 21 is in the open state, and the dustproof door 21 is provided in order to ensure dustproofness and prevent erroneous operation of the eject switch 26. The photographer can be prompted to close the cover.

Accordingly, the dustproof door 21 allows the insertion opening 1
With the lid 1 securely closed, the video information is
Can be recorded and / or reproduced on the
Dust and the like enter the disk device 8 from the optical disk 1, and the dust or the like
5 does not cause any inconvenience that degrades the reliability of recording and / or reproduction of the video information, and the video information is always stably and highly accurately recorded on the optical disc 6. It can be recorded and / or reproduced.

Next, after the video information is recorded and / or reproduced on the optical disk 6, when the disk cartridge 7 is ejected out of the disk device 8 in order to exchange the disk cartridge 7, etc., FIGS. As shown, the dustproof door 21 is opened, and the eject switch 2 is opened.
The sixth push button 26a is exposed to the outside. Then, when the push button 26a is pressed by a finger from the outside and the eject switch 26 is turned on, the cartridge loading mechanism 13 starts an unloading operation and the disc cartridge 7
There after ejected in the arrow d direction from the attachment position P ₂ to the insertion position P ₁ indicated by a solid line in FIG. 11, and is discharged in the direction of the arrow b to the insertion opening 11 outside.

Since the open / closed state of the dustproof door 21 is also detected by the open / closed state detecting sensor 27 when the disc cartridge 7 is ejected, the dustproof door 21 is erroneously closed after the eject switch 26 is turned ON. If an erroneous operation such as closing is performed, the closed state of the dustproof door 21 is detected by the open / closed state detection sensor 27,
A warning and / or an alarm informs the photographer that the dustproof door 21 is in the closed state, and at the same time, automatically ejects the disc cartridge 7 by the cartridge loading mechanism 13 so that the dustproof door 21 is closed. Since the disk cartridge 7 was ejected while being covered, the disk cartridge 7 collided with the dustproof door 21, and these disk cartridges 7,
Cartridge loading mechanism 13 and dustproof door 21
Can be prevented from being damaged.

When the power of the video camera 1 is turned on, even when the disk cartridge 7 is not mounted in the disk device 8, the dustproof door 2 can be used.
If the cover 1 is opened, a warning and / or an alarm informs the photographer that the dustproof door 21 is in the open state, and the dustproof door 21 is opened to secure dustproofness in the disk device 8. The photographer can be prompted to close the cover.

FIG. 3 is a diagram showing the relationship between the eject switch 26, the open / closed state detection sensor 27, and / or the warning display.
In the FF, when the open / closed state detection sensor 27 is ON, the dustproof door 21 is in the closed state, and the optical disk 6 of the disk cartridge 7 mounted in the disk device 8 can be recorded and / or reproduced as usual. it can. And
When the eject switch 26 is turned off and the open / closed state detection sensor 27 is turned off, it is detected that the dustproof door 21 is opened, and if recording and / or reproduction of the optical disc 6 is being performed, “record ( Playing). Please close the door. " If the eject switch 26 is ON and the open / closed state detection sensor 27 is OFF, it is detected that the dustproof door 21 is opened, and if the recording and / or reproduction of the optical disk 6 is being performed, “ Recording (playback). Please close the door. "
Or a warning such as "Eject cannot be performed during recording (playback)." When the eject switch 26 is ON, the open / closed state detection sensor 27
In the case of F, it is possible to detect that the dustproof door 21 is opened and automatically stop the ejecting operation of the cartridge loading mechanism 13.

As described above, according to the video camera 1 of the present invention, the dustproof door 21 for opening and closing the insertion slot 11 is provided, and the eject switch 26 is disposed inside the dustproof door 21. By providing the open / closed state detection sensor 27 for detecting the open / closed state, a high dustproof effect of the disk device 8 can be obtained, and a warning against an erroneous operation during shooting or when the disk cartridge 7 is mounted or ejected can be displayed. Operability (ease of use) can be significantly improved.

FIG. 4 is a block diagram showing a control circuit of the disk device 8. The servo unit 33 is driven by the system control unit 32 based on operation information from the operation unit 31, and the optical disk is controlled by the spindle motor 14. 6 is rotated at a high speed, and a two-axis actuator servo and a feed (seek) servo of the objective lens 15a of the optical pickup 15 are performed. And the system control unit 3
2 to control the RF signal processing unit 34,
Video information such as audio is recorded on the optical disk 6 by a light spot of a laser beam applied to the optical disk 6 from the objective lens 15a, and the video information reproduced from the optical disk 6 is output. The ON / OFF information of the eject switch 26 and the open / closed state detection sensor 2
7 is input to the system control unit 32, and the above-mentioned warning and / or alarm is displayed on the display unit 35 provided on the control panel or the like.

The embodiment of the present invention has been described above. As described above, the recording / reproducing apparatus and the video camera of the present invention are not limited to the above-described embodiment, but are based on the technical idea of the present invention. Various changes can be made based on this. For example, the present invention is not limited to the disk device 8 of the video camera 1, but can be applied to various recording / reproducing devices capable of recording and / or reproducing various recording media such as tape cassettes and disks. The shape and arrangement of the dustproof door 21, the eject switch 26, the open / closed state detection sensor 27, and the like can be variously changed.

[0028]

The recording / reproducing apparatus and the video camera according to the present invention configured as described above can provide the following effects.

According to a first aspect of the present invention, by closing the dustproof door, it is possible to prevent dust and the like from entering from the insertion port, and to disable the manual operation of the eject switch, thereby opening the dustproof door. This enables manual operation of the eject switch, so that when ejecting a recording medium, the dust-proof door must be opened and the eject switch must be manually operated consciously. To prevent ejection due to erroneous operation of the recording medium.
A highly operable recording / reproducing apparatus can be realized. In addition, since the dust-proof door can also serve as the means for preventing the erroneous operation of the eject switch, there is no need to attach a cover exclusively for preventing the erroneous operation of the eject switch, and the cost can be reduced by reducing the number of parts and the number of assembly steps.

According to the second aspect of the present invention, since the open / closed state detecting means of the dustproof door is provided, it is possible to achieve a high dustproof effect and prohibit a malfunction due to an erroneous operation of the eject switch, thereby achieving high reliability, safety and high reliability. Operability can be realized, especially
Damage to the recording medium, the loading mechanism, and the dustproof door due to collision of the dustproof door with the recording medium, which may occur when the dustproof door is closed during ejection of the recording medium, can be prevented.

According to the third aspect, the warning and / or the alarm is displayed by the open / closed state detecting means, so that high operability and safety can be realized.

According to a fourth aspect of the present invention, the dust-proof door is configured to be opened to the outside of the exterior part around the hinge, and the dust-proof door is switched between the closing direction and the opening direction to bias the door to rotate. With the opening / closing biasing means, the dust-proof door can be opened and closed automatically by manually operating the dust-proof door by approximately 1/2 of its opening / closing angle, so that the dust-proof door can be easily opened / closed. In addition to this, the dustproof door can be stabilized at the closed position to ensure high dustproofness, and the dustproof door can be stabilized at the open position to prevent obstruction of recording medium insertion and ejection. And a high quality recording / reproducing apparatus can be realized.

According to the fifth aspect of the present invention, the optical disk inserted into the disk cartridge is recorded and / or reproduced by an optical pickup in a non-contact manner, so that data recording and / or reproduction can be performed with high dust-proofing effect with high precision. Can be done.

Since the sixth aspect of the present invention is applied to a video camera, a quick replacement operation of a disc cartridge or the like can be smoothly performed without erroneous operation at the time of video shooting, and the mobility of video shooting can be remarkably improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view showing a closed state of a dustproof door for explaining a gist of an embodiment of a recording / reproducing apparatus in which the present invention is applied to a video camera.

FIG. 2 is a partially cutaway plan view showing the dustproof door in the open state according to the first embodiment;

FIG. 3 is a diagram showing a relationship among an eject switch, an open / closed state detection sensor, and a warning display.

FIG. 4 is a block diagram showing a control circuit of the disk device.

FIG. 5 is a side view and a rear view of the entire video camera.

FIG. 6 is a partially cutaway side view showing a disk device portion of the video camera.

FIG. 7 is a partially cutaway rear view of FIG. 6;

FIG. 8 is a partially cutaway side view showing a dustproof door and the like of a disk device portion of the video camera and an enlarged view of a main part.

FIG. 9 is a partially cutaway side view showing a state in which the dustproof door of FIG. 8 is opened and a disc cartridge is inserted.

10 is a partially cutaway side view showing a state in which a dustproof door is closed after the disk cartridge of FIG. 9 is inserted.

FIG. 11 is a partially cutaway side view showing a state in which the dustproof door of FIG. 10 is opened and a disc cartridge is ejected.

[Explanation of symbols]

1 is a video camera as a recording / reproducing device, 4 is a camera body, 4a is an exterior part, 6 is an optical disk as a disk, 7
Is a disk cartridge as a recording medium, 8 is a disk device, 21 is a dustproof door, 22 is a hinge mechanism, 23 is an opening and closing urging means, 26 is an eject switch, 27 is an opening and closing state detecting sensor as opening and closing state detecting means, 35 Is a warning and / or alarm display section.

Claims (6)

[Claims] 1. An insertion slot into which a recording medium is inserted from outside, a dustproof door for opening and closing the insertion slot, and a dustproof door which is disposed inside a closed position of the dustproof door and opens the dustproof door. A recording / reproducing apparatus, comprising: an eject switch that enables manual operation. 2. The recording / reproducing apparatus according to claim 1, further comprising an open / closed state detecting means for detecting an open / closed state of the dustproof door. 3. The recording / reproducing apparatus according to claim 2, further comprising display means for displaying a warning and / or an alarm by said open / closed state detecting means. 4. An opening / closing bias for opening the dustproof door to the outside of the exterior part around a hinge, and switching the dustproof door between a closing direction and an opening direction to rotationally bias the door. 2. The recording / reproducing apparatus according to claim 1, further comprising means. 5. The recording medium according to claim 1, wherein the recording medium comprises a disk cartridge containing a disk, and the optical disk inserted by the disk cartridge is recorded and / or reproduced in a non-contact manner by an optical pickup. The recording / reproducing apparatus according to claim 1, wherein: 6. A video camera comprising the recording / reproducing apparatus according to claim 1, 2 or 3, or 4 or 5.