JPH07272375A - Recording medium loading device - Google Patents

Abstract

PURPOSE:To prevent dust proof property from deteriorating even when an emergency ejecting mechanism is equipped against power failure and trouble, etc., by providing a frame part, etc., elastically abutted on a circumferential part of a through hole in a door frame by receiving energizing force of a spring. CONSTITUTION:A cartridge emergency ejecting rod 18 is movably provided to be pressible from outside on the door frame 16 of a tight closure structural body consisting of an upper surface panel 11, a side surface panel 12, back surface and lower surface panels and the door frame 16. The frame part 18c of a rod 18 is provided so as to be elastically abutted on the circumferential panel of the through hole 16a of the door frame 16 by receiving the energizing force of the spring 19. Moreover, recessed and projected parts 20a and 20b are provided so as to be capable of inserting into elastically abutting parts of the circumferential part of the through hole 16a and the frame part 18c from each other, constituting a labyrinth structure. By this method, a dust intruding path from a gap of the through hole 16a becomes complicated, so that dust can be prevented from entering the device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium loading device for moving a recording medium alone or a recording medium contained in a cartridge between a predetermined loading position and a mounting / discharging position.

[0002]

2. Description of the Related Art Conventionally, in an optical disk drive, a magnetic disk drive, a magneto-optical disk drive, etc., a recording medium such as a disk or a cartridge containing the disk is moved from a mounting position to a recording / reproducing position for loading. Further, after the recording and reproduction are finished, they are unloaded and moved from the recording and reproduction position to the mounting position.
In a conventional general device, loading or unloading is performed by moving a holding member that holds a cartridge by a motor, and dust adhesion to a disk or a recording / reproducing head causes a recording / reproducing error. It has a sealed structure that houses the disk, recording / playback head, etc. in a state of being blocked from the outside.

However, in a device for loading or unloading with a motor, a force for pressing and inserting a cartridge or the like into an insertion opening of the device is small, so that a good feeling of use can be obtained, but power supply is cut off due to a power failure or the like. If this happens, the motor cannot be rotated, and there is a problem that loading or unloading becomes impossible. If unloading becomes impossible, it is difficult to remove the cartridge to the outside of the device because the device has a sealed structure. May destroy the recorded information of.

Therefore, as a device having a mechanism capable of urgently ejecting the cartridge from the outside of the hermetically sealed structure in the event of a power failure or the like, the applicant of the present application has already filed a patent application.
There is a cartridge type disk drive device disclosed in Japanese Patent No. 217267.

The cartridge type disk drive device of Japanese Patent Laid-Open No. 5-217267 is a cartridge type disk drive device having a loading mechanism for moving a cartridge to a mounting position or a loading position where the cartridge can be taken out inside the hermetically sealed structure. To be slidably fitted in a through hole formed in the closed structure, and to be engaged with the loading mechanism by being operated from the outside of the closed structure, and to move the cartridge to the mounting position by the loading mechanism. A transmission member for transmitting the driving force of the cartridge, and the transmission member that constitutes the emergency ejection mechanism can move the cartridge inside the sealed structure from the outside of the device to the mounting position. If the loading motor cannot be operated due to a failure, etc. Also, in which to be able to take out the cartridge in a closed structure externally.

[0006]

However, the above-mentioned Japanese Unexamined Patent Application Publication No.
In the cartridge type disk drive device of Japanese Unexamined Patent Application Publication No. 217267, in the emergency ejection mechanism, the through-hole into which the transmission member is fitted is formed in the closed structure, so there is a problem in dustproofness.

That is, when recording and reproducing, the disk is rotating at a high speed in the apparatus, and if there is any gap in the through hole portion, external dust is drawn into the apparatus due to wind pressure, air flow, etc., and mounted on the apparatus. Dust is likely to adhere to the optical components forming the optical pickup.

The adhesion of dust to the optical parts causes problems such as data errors as deterioration of signal light.

It is an object of the present invention to provide a recording medium loading device which does not deteriorate dustproofness even if it is provided with the emergency ejection mechanism.

[0010]

In order to achieve the above object, the present invention provides a loading member for moving a recording medium to a loading / unloading position or a loading position where the recording medium can be taken out inside the sealed structure, and the sealed structure. The recording medium is movably inserted into the formed through hole and is operated from the outside of the closed structure to engage with the loading member and the recording medium from the loading position to the loading / unloading position. In a recording medium loading device including a transmission member that transmits a driving force for moving, a flange portion that comes into contact with the transmission member at the peripheral portion of the through hole inside the sealed structure by receiving the urging force of the urging means. Provided,
It is characterized in that a concavo-convex portion is provided at a contact portion between the flange portion and the peripheral portion of the through hole.

Further, in the recording medium loading device, the through-hole portion inside the closed structure and the transmission member are covered with an elastically deformable foam material.

Further, a part of the foam material is arranged in a gap portion between the recording medium insertion port provided in the closed structure and the loading member.

Further, in the recording medium loading device, the through hole portion inside the closed structure and the transmission member are covered with a sheet member which is elastically deformable.

[0014]

In the recording medium loading device having the above construction, the flange portion of the transmission member constituting the emergency ejection mechanism of the recording medium is closely contacted with the urging force of the urging means on the peripheral portion of the through hole inside the closed structure. Because of the contact, the gap between the collar portion and the inside of the closed structure becomes small, and the abutting portion between the collar portion and the inside of the closed structure becomes a labyrinth structure with irregularities, so the entry route of dust from the gap becomes complicated. Therefore, it becomes difficult for dust to enter the device.

Further, since the through-hole portion inside the hermetically sealed structure and the transmission member are covered with the elastically deformable foam material or sheet-like member, dust is prevented from entering and the movement of the transmission member is prevented from moving. Since the member is elastically deformed, it can be performed without any trouble.

Further, by disposing a part of the foamed material in the gap between the recording medium insertion port and the loading member and closing the gap, it is possible to prevent dust from entering through the recording medium insertion port.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is an exploded perspective view showing a magneto-optical disk drive device according to the first embodiment of the present invention.
A hermetically sealed structure, a loading mechanism housed in the hermetically sealed structure, a spindle motor 1, an optical pickup 2, a magnetic head 3 and the like, and a magneto-optical disk 5a as a recording medium for the hermetically sealed structure. The stored cartridge 5 is inserted and ejected.

The hermetically sealed structure comprises an upper panel 11, a loading base 21, a chassis 17, a lower panel 14 and a door frame 16 holding a dustproof door 15. The loading mechanism includes a loading base 21, a cartridge holder 22, It is composed of a carrier 23, a spring 24, a motor unit 25, and the like.

The spindle motor 1 and the optical pickup 2 are arranged in the chassis 17, and the magnetic head 3 is attached to the opening 22a of the cartridge holder 22 via the arm 3a.

Next, the loading operation of the above embodiment will be described.

When the cartridge 5 is inserted into the opening 27a of the front panel 27, the cartridge 5 is inserted into the closed structure by opening the dustproof door 15 and is held by the cartridge holder 22 in the closed structure. Becomes

The cartridge holder 22 is swingably connected to the carrier 23 by a connecting lever 26.
Since the spring 23 is connected to the loading base 21 by the spring 24, the spring 23 is urged in the direction of arrow A1.

When the cartridge 5 is held by the cartridge holder 22, the latch mechanism (not shown) is released and the urging force of the spring 24 moves the carrier 23 in the direction of arrow A1. Since the movement of the cartridge holder 22 holding the cartridge 5 is restricted in the insertion / ejection direction, the carrier 23 moves in the direction of arrow A1 and descends in the direction of the loading base 21. Guide pins 21a and 21b are planted in the loading base 21, and the guide pins 21a and 21b are fitted into guide holes (not shown) formed in the lower surface of the descending cartridge 5 to allow the cartridge 5 to move. Specify the position of. Further, the dustproof door 15 is configured to be closed in association with the lowering of the cartridge 5.

When the cartridge holder 22 reaches the lowest position, the cartridge 5 is set to the loading position. At the loading position, the cartridge 5 has a shutter 5b by a shutter opening / closing mechanism (not shown).
Is opened, the internal magneto-optical disk 5a is exposed, the magnetic head 3 and the optical pickup 2 can access the magneto-optical disk 5a, and the hub (not shown) of the magneto-optical disk 5a is exposed. Then, the chucking portion of the spindle motor 1 is fitted and the rotational force can be transmitted.

Next, the normal unloading operation of this embodiment will be described.

By pressing the eject button 27b installed on the front panel 27, the motor 25a of the motor unit 25 is driven and the cam 25b is rotated. Pins 23b are planted on the lower surface of the carrier 23,
The pin 23b is in contact with the cam 25b. When the cam 25b comes into contact with the pin 23b and rotates, the carrier 23 makes a follower motion along the sliding surface of the cam 25b, so that the carrier 23 is moved in the direction of the arrow A2 against the urging force of the spring 24, and is moved to a predetermined position. Is latched by the latch mechanism (not shown).

The cartridge holder 22 connected to the carrier 23 by the connecting lever 26 is indicated by the arrow A of the carrier 23.
It rises with the movement in two directions, and separates the cartridge 5 from the loading position. As the cartridge holder 22 rises, the shutter opening / closing mechanism closes the shutter 5b of the cartridge 5, and when the cartridge holder 22 reaches the uppermost position, pushes the cartridge 5 toward the dustproof door 15 which is the discharging direction. The dustproof door 15 is configured to open in association with the rise of the cartridge 5. The cartridge 5 pushed out in the ejecting direction is ready to be taken out, with the rear end of the cartridge 5 protruding outside from the opening 27a of the front panel 27.

FIG. 1 is a side sectional view showing the structure of the main part of this embodiment, and FIG. 3 is a perspective view showing the relationship between the door frame shown in FIG. 1 and a rod which is a transmission member. Has a through hole 16a formed in the inserting / discharging direction, and a supporting plate 16b is erected so as to face the through hole 16a at a position apart from the surface on which the through hole 16a is formed by a predetermined distance. A U-shaped groove 16c is formed in 16b.

A rod 18 is provided in the through hole 16a and the groove 16c.
Is slidably fitted. The rod 18, which is a member for transmitting a pressing force, includes a large diameter insertion portion 18a and a small diameter pin portion 18b.
It is a substantially rod-shaped member composed of, the collar portion 18c is provided around the boundary position where the insertion portion 18a and the pin portion 18b are joined, and the pressing surface 18d that is the end surface of the insertion portion 18a is , Is formed in a conical concave surface.

The insertion portion 18a is loosely fitted in the through hole 16a, and the pin portion 18b is loosely fitted in the groove portion 16c of the support plate 16b.
The spring 19 wound around is clamped by the collar portion 18c and the support plate 16b while being contracted to a certain length.
Since the collar portion 18c is biased by the spring 19 toward the surface on which the through hole 16a is formed, the door frame 16 is not pressed.
Inside, it is in contact with the peripheral portion of the through hole 16a. At the contact portion between the collar portion 18c and the peripheral portion of the through hole 16a, the concave portion 20a and the convex portion 20b are provided.
And are provided so that they can enter and leave each other. Which of the flange portion 18c and the through hole 16a is provided with the concave portion 20a or the convex portion 20b may be determined according to the specifications.

The pin portion 18b of the rod 18 is arranged so that its tip end faces the contact plate 23c of the carrier 23, and the front panel 27 has an insertion hole 27c at a position facing the pressing surface 18d. Has been formed.

Therefore, by pressing the pressing rod 30 which is a rod-shaped member indicated by a chain double-dashed line in FIG. 1 to the pressing surface 18d, and further in the arrow A2 direction against the biasing force of the spring 19, The rod 18 makes it possible to move the carrier 23 in the direction of arrow A2 by abutting the tip of the pin portion 18b on the contact plate 23c of the carrier 23.

As described above, the carrier 23 is constructed so that the cam 25b of the motor unit 25 is brought into contact with the pin 23b and rotated in the direction of arrow A2 during unloading. According to the example, the carrier 23 can be moved also by pressing and moving the rod 18 with the pressing rod 30. By moving the carrier 23 by a predetermined distance, the cartridge 5 held by the cartridge holder 22 and set at the loading position can be moved to the mounting position, and the dustproof door 15 is moved as the cartridge 5 moves in the mounting position direction. Open.

As described above, according to this embodiment, even when the motor unit 25 cannot be driven and unloaded due to, for example, a power failure or damage to the motor 25a of the motor unit 25, the user presses it. rod
Insert 30 into the insertion hole 27c of the front panel 27, and
By pressing and moving the rod 18, urgent ejection for unloading becomes possible, and the cartridge 5 set at the loading position can be moved to a mounting position where it can be taken out of the apparatus.

Further, the collar portion 18c of the rod 18 when not pressed
Is elastically in contact with the peripheral surface of the through hole 16a, so that the rod 18 can be positioned at a fixed position with respect to the door frame 16, and further from the gap between the through hole 16a and the insertion portion 18a of the rod 18. Since the outside air can be prevented from flowing in, the airtightness of the closed structure can be maintained. Moreover, the collar portion 18c and the through hole 16a
Since a kind of labyrinth (labyrinth) is formed on the contact surface with the peripheral portion by the concave and convex portions 20a and 20b, even if a gap is formed in the contact surface portion by the pressing of the rod 18, the dust intrusion path Is complicated and it becomes difficult for dust to enter the inside, and the dustproof effect is enhanced.

Further, since the pressing surface 18d of the rod 18 is formed as a conical concave surface, a rod-shaped member such as the pressing rod 30 that is in contact with the pressing surface is slid toward the center of the pressing surface 18d. Since force is generated, the pressing position of the pressing rod 30 can be stabilized and operability can be improved.

FIG. 4 is a sectional view of the essential part of the second embodiment of the present invention. In this second embodiment, the through hole 16a of the door frame 16 is provided with the rod 18 for enabling the emergency discharge as described above. A peripheral portion of an elastically deformable foam material (for example, foamed chloroprene rubber) 40 so as to cover the flange portion 18c of the through hole 16a, which is slidably fitted and protrudes into the door frame 16 of the rod 18. 40a is bonded to the inside of the door frame 16 by an appropriate bonding means such as a double-sided adhesive tape 41.

The outer surface of the foam material 40 is brought into contact with the protrusion 23d protruding from the side portion of the carrier 23, and the rod 18 is moved inward by pressing the rod 18 as in the first embodiment. Then, the foam material 40 is elastically deformed to move the carrier 23 to the unloading position via the protrusion 23d.

When the pressing of the rod 18 is released, the rod 18 returns to its original position under the restoring force from the foam material 40. When the rod 18 is pressed or released, the foam material 40 blocks the inside of the closed structure and the gap between the rod 18 and the door frame 16, so that it is excellent in dustproofness.

FIG. 5 is a cross-sectional view of an essential part of the third embodiment of the present invention. In this third embodiment, a modified body of the foam material 40 in the second embodiment described with reference to FIG. 4 is used. There is. FIG. 6 is an exploded perspective view showing a door frame and a foam material of the third embodiment, and FIG. 7 is a perspective view showing an assembled state.

5 to 7, only the characteristic part of the third embodiment will be described. The foam material 45 has a long plate shape, and the door frame 16 in the front inside of the door frame 16,
It is installed so as to close the gap between the loading base 21 and the cartridge 5 and the cartridge holder 22.

In particular, as can be seen in FIG. 5, which is a sectional view taken along the line AA of FIG. 7, in the installation portion of the rod 18 of the door frame 16, the foam material 45 has an inverted L-shaped cross section, Similar to the second embodiment, the gap between the rod 18 and the door frame 16 is blocked, and the gap between the cartridge insertion opening 16d of the door frame 16 and the lower part of the hermetically sealed structure is closed to further enhance the dustproof effect. ing.

FIG. 8 is a cross-sectional view of the essential parts of the fourth embodiment of the present invention. In the fourth embodiment, the through hole 16a protruding into the door frame 16 of the rod 18 for enabling the above-mentioned emergency discharge is provided. A peripheral portion 50a of an elastically deformable sheet material (for example, polyethylene) 50 is adhered to the inside of the door frame 16 by an appropriate adhering means such as a double-sided adhesive tape 41 so as to cover the flange portion 18c of a part.

In the fourth embodiment, the same effect as that of the second embodiment can be obtained, and at the same time, the cost can be reduced by using the sheet material 50 for preventing dust.

[0046]

As described above, according to the recording medium loading device of the present invention, according to the first aspect of the invention, the flange portion of the transmission member forming the emergency ejection mechanism of the recording medium is inside the closed structure. Since it comes into close contact with the peripheral portion of the through hole due to the urging force of the urging means, the gap between the collar portion and the inside of the sealed structure can be reduced, and the contact portion between the collar portion and the inside of the sealed structure can be made smaller. Since the labyrinth structure having irregularities can be formed, the entry route of dust through the gap is complicated, and it is possible to prevent dust from entering the device, resulting in an excellent dustproof effect.

According to the second aspect of the present invention, since the through hole portion inside the closed structure and the transmission member are covered with the elastically deformable foam material, the invasion of dust can be prevented, and the movement of the transmission member can be prevented. Since the foam material is elastically deformed, it can be performed without any trouble.

According to the third aspect of the present invention, a part of the foam material is disposed in the gap between the recording medium insertion port and the loading member to close the gap, so that dust from the recording medium insertion port can be collected. Intrusion can also be prevented.

According to the invention described in claim 4, since the through-hole portion inside the hermetically sealed structure and the transmission member are covered with the elastically deformable sheet-like member, the same effect as that of the invention according to claim 2 can be obtained at low cost. Can be realized in.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part of a first embodiment of a recording medium loading device of the present invention.

FIG. 2 is an exploded perspective view of the magneto-optical disk drive device according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing a relationship between the door frame and the rod of FIG.

FIG. 4 is a sectional view of an essential part in a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part in a third embodiment of the present invention.

FIG. 6 is an exploded perspective view showing a door frame and a foam material according to a third embodiment.

FIG. 7 is a perspective view showing an assembled state of FIG.

FIG. 8 is a sectional view of an essential part in a fourth embodiment of the present invention.

[Explanation of symbols]

5 ... Cartridge, 5a ... Magneto-optical disk, 11 ... Top panel, 12 ... Side panel, 13 ... Rear panel, 14
… Bottom panel, 16… Door frame, 16a… Through hole,
16b ... Support plate, 18 ... Rod (transmission member), 18a ... Insert part, 18b ... Pin part, 18c ... Flange part, 18d ... Pressing surface, 1
9 ... Spring (biasing means), 20a ... Recessed portion, 20b ... Convex portion, 21 ... Loading base, 21a, 21b ... Guide pin, 22 ... Cartridge holder, 23 ... Carrier, 23
b ... pin, 23c ... contact plate, 25 ... motor unit, 25
a ... motor, 25b ... cam, 27 ... front panel, 27
a ... opening, 27b ... eject button, 30 ... press rod,
40, 45 ... Foam material, 50 ... Sheet material (sheet-like member).

Claims (4)

[Claims] 1. A loading member for moving a recording medium to a mounting / discharging position or a loading position where the recording medium can be taken out inside the closed structure, and a closed structure movably inserted into a through hole formed in the closed structure. And a transmission member that engages with the loading member and that transmits a driving force for moving the recording medium from the loading position to the loading / unloading position by being operated from outside the body. In the recording medium loading device, the transmission member is provided with a collar portion that abuts against the peripheral portion of the through hole inside the closed structure body by receiving the biasing force of the biasing means.
A recording medium loading device, characterized in that a concavo-convex portion is provided at a contact portion between the flange portion and a peripheral portion of the through hole. 2. A loading member for moving the recording medium to a loading / unloading position or a loading position where the recording medium can be taken out inside the hermetically sealed structure, and a movably inserted through a through-hole formed in the hermetically sealed structure. And a transmission member that engages with the loading member and that transmits a driving force for moving the recording medium from the loading position to the loading / unloading position by being operated from outside the body. In the recording medium loading device, the through-hole portion inside the closed structure and the transmission member are covered with an elastically deformable foam material. 3. The recording medium loading according to claim 2, wherein a part of the foam material is disposed in a gap between a recording medium insertion opening provided in the hermetically sealed structure and the loading member. apparatus. 4. A loading member for moving a recording medium to a loading / unloading position or a loading position where the recording medium can be taken out inside the closed structure, and a closed structure movably inserted into a through hole formed in the closed structure. And a transmission member that engages with the loading member and that transmits a driving force for moving the recording medium from the loading position to the loading / unloading position by being operated from outside the body. In the recording medium loading device, the through hole portion inside the closed structure and the transmission member are covered with an elastically deformable sheet-like member.