WO2000055855A1 - Cartouche de disque magnetique - Google Patents

Cartouche de disque magnetique Download PDF

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Publication number
WO2000055855A1
WO2000055855A1 PCT/JP2000/000740 JP0000740W WO0055855A1 WO 2000055855 A1 WO2000055855 A1 WO 2000055855A1 JP 0000740 W JP0000740 W JP 0000740W WO 0055855 A1 WO0055855 A1 WO 0055855A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic disk
media
corner
case
disk medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2000/000740
Other languages
English (en)
Japanese (ja)
Inventor
Kengo Oishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Publication of WO2000055855A1 publication Critical patent/WO2000055855A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/50—Reconditioning of record carriers; Cleaning of record carriers ; Carrying-off electrostatic charges
    • G11B23/505—Reconditioning of record carriers; Cleaning of record carriers ; Carrying-off electrostatic charges of disk carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/03—Containers for flat record carriers
    • G11B23/033—Containers for flat record carriers for flexible discs
    • G11B23/0332—Containers for flat record carriers for flexible discs for single discs, e.g. envelopes

Definitions

  • the present invention relates to a magnetic disk drive cartridge for housing a magnetic disk medium in a case and rotating the magnetic disk medium for use in magnetic recording and reproduction, and in particular, a magnetic disk cartridge having a dust removing structure.
  • the magnetic disk force cartridge is a disk-shaped magnetic disk media that is rotatably housed in a case where the upper and lower shells are joined together. It is highly reliable to perform recording and reproduction on the magnetic disk media using a magnetic head. In order to ensure the above-mentioned reliability, it is important that dust, which causes a so-called drop, is not attached to the magnetic disk medium or the magnetic head. The dust is generated inside the magnetic disk cartridge and invades from the outside, but it is difficult to completely prevent the generation and intrusion.
  • a liner made of non-woven fabric or the like is provided on the inner surface of the case to wipe off dust adhering to the magnetic disk media. Is being done.
  • the rotation speed is increased in response to the increase in the recording capacity of the magnetic disk medium, and in order to secure the stability of the driving torque and to suppress the increase in the motor torque, the liner is required.
  • the liner is required.
  • the effect of the liner to remove dust from the surface of the magnetic disk medium is reduced, and dust attached to the magnetic disk medium accumulates on the head gap of the magnetic head.
  • the problem is remarkable, and the dust posture causes the head posture to become unstable, resulting in good recording and reproduction.
  • T JP / 70 A countermeasure is needed to prevent this from happening.
  • the recording wavelength is short, and the magnetic disk medium is rotated at a high speed such as 3600 rpm to secure a transfer rate. It is necessary to remove dust adhering to the magnetic disk media to reduce the load and prevent the dust from affecting the head gap to ensure reliability.
  • this large-capacity magnetic disk cartridge driving device it is necessary to provide a low-speed rotation drive in order to enable recording and reproduction of a conventional magnetic disk cartridge having a lower recording capacity. It is necessary for the drive mode to support a low to high speed rotation and obtain a certain level of rotation torque.
  • this drive must be compatible with desktop computers to lightweight and thin notebook computers, and the drive mode must be low-power and thin, making it difficult to obtain high rotational torque. is there.
  • a large-capacity magnetic disk cartridge has the smallest possible drive torque of the magnetic disk medium, that is, the magnetic disk medium is not affected by interference with components other than the magnetic head during high-speed rotation of the magnetic disk medium. Less is required.
  • the present invention has been made in view of the above points, and it is an object of the present invention to provide a magnetic disk force cartridge capable of removing dust adhering to a magnetic disk medium without increasing a driving torque and improving reliability.
  • the liner 60 disposed on the inner surface of the lower shell 2 (same for the upper shell) has a fan-shaped non-fixed portion 60 a on the side opposite to the magnetic head insertion opening 11.
  • the other fixed portion 6 O b (cross-hatched area) is not fixed to the inner surface of the lower shell 2 and is fixed to the inner surface of the lower shell 2 entirely.
  • the non-fixed portion 60a is cut at the downstream side with respect to the media rotation direction to be a free end, and the free end rises (rotates down at the upper shell liner) with the rotation of the magnetic disk media. It is formed so that it can contact the disk media surface.
  • the length h 1 of the outer peripheral portion in the media rotation direction is the inner peripheral portion. Is longer than h2, and in the state of contact with the magnetic disk media, the outer peripheral side of the media has a larger area than the inner peripheral side and comes into contact with the above-mentioned non-fixed portion 60a and comes into strong contact therewith. .
  • the pressing force of the upper liner is larger than that of the lower liner 60 due to its own weight, and the magnetic disk media rotates with the outer peripheral side deflected downward and deformed into an umbrella shape as a whole.
  • the contact with the head may not be balanced between the inner and outer circumferences, affecting the recording / reproducing characteristics in high-density recording, and possibly causing a poor media interface.
  • the linear velocity for the rotation of the medium at the free end of the non-fixed portion 60a of the liner 60 is slow on the inner peripheral side, and the cleaning effect is reduced, and the dust removing effect on the inner peripheral side is improved. It is preferable that the inner peripheral portion has a larger area than the outer peripheral portion. If contact is made, the above-mentioned head media interface becomes similarly difficult.
  • the present invention has been made in view of the above points, and it is intended to prevent the deformation of a magnetic disk medium and to improve the reliability of magnetic recording / reproducing performance when cleaning by bringing the free end of an unfixed portion of a liner into contact with a magnetic disk medium.
  • a second object is to provide a magnetic disk cartridge of which the height is increased.
  • the present invention provides a magnetic disk cartridge which is different from the solution of the first problem in that dust attached to the magnetic disk medium is removed without increasing the driving torque and reliability is improved. This is the third issue.
  • a magnetic disk cartridge of the present invention that solves the first problem described above is configured to rotatably accommodate a disk-shaped magnetic disk medium in a case formed by joining an upper shell and a lower shell, and to insert a magnetic head into the case.
  • a magnetic disk force cartridge having an opening and having liners fixed to inner surfaces of an upper shell and a lower shell facing the magnetic disk media
  • an inner surface of the upper and lower shells in the case has an outer periphery of the magnetic disk media.
  • An inner rib for partitioning the inside of the case into a media accommodating portion and a corner portion, an inner rib for at least one corner portion is cut out, and a vent opening for communicating a part of the corner with the media accommodating portion is provided.
  • a dust trap member is provided on at least one inner surface of some upper and lower shells. is there.
  • the trap member includes, for example, a sheet having an adhesive layer for fixing to the inner surface of the shell on one side and an adhesive layer for dust trapping on the other side, and an irregularly formed adhesive layer for dust trapping. Etc. can be used. These sheet-shaped trap members are fixed to one (particularly, the lower surface) or both surfaces of the inner surface of the shell. Further, a trap member may be provided by juxtaposing a plurality of tubular members provided with an adhesive layer at least on the inner periphery. In this case, the trap member is fixed to one surface of the inner surface of the shell depending on its size.
  • the internal space of the downstream portion in the media rotation direction from the air inlet through which the airflow flows from the media accommodating portion to a part of the corner where the trap member is disposed is filled with another media accommodating portion.
  • the internal space Is preferred.
  • the inside rib at a part of the corner is cut off to provide a ventilation port that communicates the part of the corner with the media housing portion, and at least one of the corners is provided.
  • the dust trap member By providing the dust trap member on the inner surface, an airflow generated by the rotation of the magnetic disk medium flows into a part of the corner from the vent, and dust contained in the airflow is collected by the trap member.
  • dust can be removed without contact with the magnetic disk medium and without increasing torque loss due to rotation of the magnetic disk medium, and high-speed rotation drive can be performed stably.
  • the trap member having the exposed adhesive layer has a small airflow resistance, and can remove dust easily even in a weak airflow.
  • the air resistance of this portion increases and the airflow accompanying the rotation of the magnetic disk media is divided. It is possible to promote the flow of air into the corners through the ventilation holes, increasing the dust removal effect.
  • a magnetic disk cartridge according to the present invention that solves the second problem described above includes a disk-shaped magnetic disk medium rotatably accommodated in a case formed by joining an upper shell and a lower shell, and a magnetic head inserted into the case.
  • the liner is fixed to the inner surface of each of the upper shell and the lower shell facing the magnetic disk medium except for the magnetic head insertion opening.
  • the free end is provided on the inner surface of the shell and the lower shell, and the downstream side of the unfixed portion in the media rotation direction is provided at the free end, and the free end is provided so as to be separated from the inner surface of the shell and to be able to contact the surface of the magnetic disk media.
  • the length of the non-fixed portion in the rotation direction of the magnetic disk medium is set to be substantially equal on the inner peripheral side and the outer peripheral side. It is an.
  • the non-fixed portion of the liner may be disposed near the magnetic head insertion opening, or may be disposed substantially opposite to the opening and the center of rotation.
  • the liner may be separated into a portion fixed to the inner surface of the shell and a non-fixed portion, or the fixed portion and the non-fixed portion may be made of different materials.
  • a part of the liner is not fixed to the shell, and the free end is provided so as to be separated from the inner surface of the shell so as to be able to contact the magnetic disk media.
  • the length of the non-fixed portion in the direction is set to be substantially equal between the inner and outer circumferences, so that the inner and outer circumferences of the magnetic disk media come into contact with almost equal length and area. While maintaining good cleaning action, reducing the deviation of the inner and outer circumferences of the magnetic disk media due to the contact of the non-fixed part of the liner, and reducing the contact with the magnetic head. It can be performed in good condition, avoiding the occurrence of head-media interface failure, and improving the reliability of magnetic recording / reproducing performance.
  • a magnetic disk cartridge according to the present invention which solves the third problem, accommodates a disk-shaped magnetic disk medium rotatably in a case formed by joining an upper shell and a lower shell, and inserts a magnetic head into the case.
  • a magnetic disk cartridge having an opening for use, and a liner fixed to the inner surface of each of the upper shell and the lower shell facing the magnetic disk media, wherein the inner surfaces of the upper and lower shells in the case are provided with the magnetic disk media.
  • An inner rib is provided on the outer periphery to partition the inside of the case into a media accommodating section and a part of a corner, and an inner rib of at least one corner is cut out to provide a vent opening for communicating the part of the corner with the media accommodating section.
  • a filter member for dust collection is provided in a ventilation path of the corner portion.
  • the filter member is formed of a member having as low a ventilation resistance as possible, and a plurality of coarse-density porous films can be used. May be formed so that the airflow passes.
  • This filter member is preferably provided downstream of a part of the ventilation path.
  • the space is formed narrower than the internal space of the housing portion.
  • the inner rib at the corner is cut.
  • a vent is provided to connect a part of the corner to the media storage part by notching, and a dust collecting filter member is provided on the inner surface of the ventilation path in a part of this corner, which is generated with the rotation of the magnetic disk media.
  • the flowing air flows into the corners from the ventilation holes, and the dust contained in the air flow is collected by the filter member, so that the dust adhering to the magnetic disk media can be reduced and removed, and the magnetic head can be removed.
  • the reliability can be improved by suppressing the occurrence of a door gap due to the adhesion of dust to the head gap.
  • dust can be removed without contact with the magnetic disk medium and without increasing loss torque with respect to rotation of the magnetic disk medium, and high-speed rotation can be performed stably.
  • the internal space of the downstream side portion is formed narrower than the airflow port where the airflow flows into the corner where the filter member is disposed, the air resistance in this portion increases and the airflow accompanying the rotation of the magnetic disk media is reduced.
  • the flow can be diverted and flow into the corner part from the ventilation hole, and the dust removal effect can be enhanced.
  • FIG. 1A is an exploded perspective view of the upper and lower shells of a magnetic disk drive cartridge and a magnetic disk media according to an embodiment of the present invention
  • FIG. 1B is an exploded perspective view of the upper and lower shells of the magnetic disk drive cartridge and the magnetic disk media according to one embodiment of the present invention
  • FIG. 1C is an exploded perspective view of the upper and lower shells of the magnetic disk drive cartridge and the magnetic disk media according to one embodiment of the present invention.
  • FIG. 2 is a perspective view of a trap member according to another embodiment
  • FIG. 3 is a perspective view of a trap member in still another embodiment
  • FIG. 4 is a sectional view of a main part of the magnetic disk drive cartridge of FIG. 1B,
  • FIG. 5 is a perspective view of a lower shell of a magnetic disk cartridge according to another embodiment.
  • FIG. 6 is a perspective view of a lower shell of a conventional magnetic disk cartridge.
  • FIG. 1A is an exploded perspective view of the upper and lower shells of a magnetic disk cartridge and a magnetic disk medium according to one embodiment.
  • the magnetic disk force cartridge is formed from a synthetic resin such as a flat-styrene copolymer by joining the upper shell 1 and the lower shell 2 formed of a synthetic resin such as acrylonitrile-butadiene-styrene copolymer.
  • a flat case C (hard case) is formed by joining the upper shell 1 and the lower shell 2 thus formed.
  • a disk-shaped magnetic disk medium whose center is attached to and held by the center core member 3 is formed.
  • 4 (recording medium) is rotatably accommodated.
  • An upper liner 5 and a lower liner 6 are provided above and below the magnetic disk medium 4.
  • the magnetic disk media 4 has a disk-shaped base made of a flexible polyester sheet or the like, and magnetic layers are formed on both sides of the disk-shaped base.
  • the recording area 4a has an annular shape excluding the outer peripheral portion and the inner peripheral portion.
  • the inner and outer edges of the recording area 4a are non-recording areas 4b.
  • the number of rotations of the magnetic disk medium 4 in the rotation direction D is 300 to 500 rpm, for example, 360 rpm for a 3.5-inch size.
  • the upper shell 1 and the lower shell 2 have a substantially rectangular flat shape, and outer ribs 1 a and 2 a forming side walls on the outer periphery are formed on the inner surface thereof, and inner ribs 1 b and 2b is provided.
  • the inner ribs l b and 2 b are provided on the outer periphery of the magnetic disk medium 4 and divide the inside of the case C into a medium accommodating section 30 and corner portions 31 to 34.
  • rectangular magnetic head openings 10 and 11 penetrate the upper and lower walls at the front side of the upper and lower seals 1 and 2, and a center core member 3 is provided at the center of the lower shell 2.
  • a circular spindle hole 2c is opened in a size to face.
  • a shirt member slidable in the left and right directions in the figure is assembled to open and close the magnetic head insertion openings 10 and 11 of the case C.
  • annular projection 12 protrudes inward from the center core member 3, and the annular projection 12 fits into the inner peripheral side of the core member 3. To restrict the movement of the magnetic disk medium 4 in the radial direction.
  • an upper liner 1 5 and a lower liner 6 formed by cutting a non-woven fabric sheet or the like into a substantially octagonal shape (or a round shape) may be used. It is fixed by welding or the like.
  • the upper liner 1 and the lower liner 6 have the same shape, and the portion overlapping the magnetic head insertion openings 10 and 11 is cut away. A circular hole slightly larger than the outer diameter of c is opened.
  • the upper shell 1 and the lower shell 2 are assembled into a case C by welding welding projections 15 provided at the corners 31 to 34 to each other by ultrasonic welding.
  • the third corner 33 on the rear side and on the left side opposite to the magnetic head insertion openings 10 and 11 is notched at both ends of the inner ribs lb and 2b.
  • ventilation holes 33 a and 33 b are provided for communicating the corner portion 33 and the media accommodating portion 30.
  • the air vent 33 a on the upstream side with respect to the rotation direction D of the magnetic disk medium 4 serves as an inlet, and the air vent 33 b on the downstream side serves as an outlet.
  • the inner ribs l b, 2 b can be prevented from being deformed when a pressing force acts on the case C by cutting off both ends and leaving an intermediate portion.
  • the projections 13 extending in the radial direction of the media accommodating portion 30 are arranged vertically with respect to the inner ribs lb, 2b between the ventilation holes 33a, 33b on both sides of the third corner portion 33. It is formed on the inner surface of shells 1 and 2.
  • the internal space (vertical space) of the downstream side in the media rotation direction D from the ventilation port 33 a serving as the inflow port is narrower than the internal space of the other media accommodating section 30.
  • the airflow resistance of this portion is increased, so that the amount of air flowing from the airflow flowing through the media accommodating section 30 to the airflow flowing through the corner portion 33 through the vent hole 33 a is increased. It has become.
  • the shape and the amount of protrusion of the projections 13 are such that contact with the magnetic disk medium 4 is avoided as much as possible so that the magnetic disk medium 4 is not deformed.
  • trap members 20 each having an exposed adhesive layer are provided on inner surfaces of the upper shell 1 and the lower shell 2 in the third corner portion 33.
  • This The trap member 20 of 74 is provided in a substantially triangular shape corresponding to the shape of the corner portion 33, and the adhesive layers are formed on both surfaces of the base body.
  • the adhesive layer on one side is for fixing to the inner surfaces of the upper and lower shells 1 and 2, and the adhesive layer on the other side is for dust trapping, and comes into contact with the airflow flowing from the vent 33 a to collect and collect dust.
  • the magnetic disk cartridge when the magnetic disk medium 4 is rotationally driven by being inserted into the drive device, an airflow from the inner circumference to the outer circumference and directed in the rotation direction is generated with the high-speed rotation.
  • the dust flows along with the airflow so as to roll on the surface of the magnetic disk medium 4, and a part of the dust flows into the inside of the third corner 33 from the air vent 33 a and is included in the airflow. Dust adheres to the adhesive layer of the trap member 20 and is collected. This prevents dust from entering the contact area with the magnetic head so that it does not cause a drop.
  • the trap member 20 is preferably disposed at the third corner part 33 because of its structure, but in addition to or instead of this, the other corner parts 31, 32, It may be arranged at 34.
  • an identification hole 16 is formed at the end side and a welding projection 15 is formed at the corner, but a usable internal space is large and a large trap member 20 is formed.
  • the airflow generated by the rotation of the magnetic disk media 4 is stable and strong, so some corners are required. This is preferable in that the airflow that can be introduced into 3 can be increased.
  • the interior space is narrower in the second corner on the rear right side, part 3 2, as the light protector is installed, and the fourth corner section 34 on the front left side, It is not suitable for installation of trap members 20 because the shutter panel is provided.
  • this first corner part 31 is used for inserting a magnetic head. Near the openings 10 and 11, the air flowing through the magnetic disk medium 4 due to the rotation of the magnetic disk medium 4 is disturbed by the air flowing from the magnetic head introduction openings 10 and 11, and flows into the corners 31. Point where air volume is reduced As a result, the dust collecting effect may be reduced, and a slit-shaped opening may be formed at the front end face, in which case the flow of the internal air becomes unstable.
  • the position of the trap member 20 can be changed as appropriate in accordance with the change in the internal structure of the parts 31 to 34.
  • the identification hole 16 is opened in the third corner part 33, it is possible to prevent the airflow flowing from the inlet side ventilation hole 33a from being discharged to the outside through the identification hole 16. If used, there is a case where it is not necessary to form the outflow side vent hole 33b in the inner ribs lb, 2b. At this time, there is a possibility that dust may flow in from the outside through the identification hole 16, but when the magnetic disk medium 4 is rotating, there is no air inflow. Due to the absence, the possibility of being trapped by the trap member 20 before moving to the media storage section 30 and attaching to the magnetic disk medium 4 is low. In some magnetic disk cartridges having different recording capacities, one of the identification holes 16 is not opened in the third corner part 33.
  • FIG. 2 shows a trap member 21 according to another embodiment.
  • the trap member 21 has a corrugated base body, an adhesive layer for dust trapping is formed on an exposed surface thereof, and is fixed to the inner surfaces of the upper and lower seals 1 and 2 with the opposite adhesive layers. .
  • the surface area of the adhesive layer of the trap member 21 is increased, the dust collecting effect is increased, and a long-time collecting effect is obtained.
  • the surface area of the dust trap adhesive layer may be increased as another uneven shape.
  • FIG. 3 shows a trap member 22 according to still another embodiment.
  • the trap member 22 has a base body formed in a cylindrical shape, an adhesive layer formed on the inner and outer peripheral surfaces thereof, and fixed to the inner surface of the upper shell 1 or the lower shell 2.
  • a plurality of the trap members 22 having different lengths corresponding to the lengths of the installation portions of the corner portions 33 are arranged in parallel along the flow of air, and the air flows through the inside of the cylinder and is formed on the inner peripheral side.
  • the adhesive layer mainly collects dust.
  • the trap member 22 may be formed by applying a pressure-sensitive adhesive layer on a cylindrical base body formed in advance, or may be formed by bending a double-sided pressure-sensitive adhesive sheet or a single-sided pressure-sensitive adhesive sheet into a cylindrical shape.
  • the trap member 22 may be installed on the inner surfaces of the upper and lower shells 1 and 2 if it is thin, but as described above if the diameter is large. It is fixed to one of the inner surfaces.
  • the trapping effect is enhanced. If an adhesive layer is also provided on the outer peripheral portion, the trapping effect is further enhanced.
  • the fixation of the trap members 20 to 22 to the inner surfaces of the upper and lower shells 1 and 2 may be performed by another fixing method, in addition to the method using the double-sided adhesive layer. Further, the trap members 20 to 22 may be provided only on one of the inner surface of the upper shell 1 and the inner surface of the lower shell 2, in which case the lower shell 2 which is lower when used is used. It is preferable to install it on the inner surface.
  • FIG. 1B is an exploded perspective view of the upper and lower shells of the magnetic disk cartridge according to one embodiment
  • FIG. 4 is a sectional view of a main part of the magnetic disk drive cartridge of FIG. 1B.
  • the upper shell 1 and the lower shell 2 have a substantially rectangular flat shape, and outer peripheral ribs 1 a and 2 a forming side walls are provided on the outer periphery, and inner ribs 1 b and 2 are provided substantially obliquely at corners.
  • a rectangular magnetic head insertion opening 10, 11 is provided, and in the center of the lower shell 2, a circular spindle hole 2 c is opened in a size that the sensor core member 3 faces.
  • a shirt member slidable in the left-right direction in the figure is assembled to open and close the magnetic head insertion openings 10 and 11 of the case C.
  • an upper liner 1 and a lower liner 6 formed by cutting a non-woven fabric sheet or the like into an approximately octagonal shape (or a round shape) are formed by ultrasonic welding, bonding, or the like.
  • the inner ribs lb, 2b are formed on the outside along the shape of the liners 5, 6, respectively.
  • the upper liner 1 and the lower liner 6 have the same shape, the portion overlapping the magnetic head ⁇ inlet openings 10 and 11 is cut off, and the annular projection 12 or the spindle hole 2 is also formed at the center. A hole larger than the outer diameter of c is formed.
  • the liners 5 and 6 have upper and lower non-fixed portions 5 a and 6 a corresponding to the upstream side in the media rotation direction D in the vicinity of the magnetic head insertion openings 10 and 11. 1 and the lower seal 2 are not fixed to the inner surface, and other than the non-fixed portions 5a and 6a,
  • the entire surfaces of the fixed portions 5b and 6b are fixed to the inner surfaces of the upper and lower seals 1 and 2 by, for example, ultrasonic welding using a welding horn (not shown).
  • the tip surface of the welding horn has the same shape as the fixed portions 5b, 6b of the liners 5, 6, and a welding pattern (welding line) is formed on the entire surface of the tip surface due to the uneven shape.
  • the edge corresponding to the non-recording area 4b of the magnetic disk media 4 along the outer shape of the liners 5 and 6 and the removed inner shape is fixed with a dense, short, radial welding wire.
  • the inside corresponding to the recording area 4a is fixed by a stripe-shaped parallel vertical welding line (may be a broken line).
  • the above-mentioned stripe shape may be a horizontal line or an oblique line.
  • the welding pattern may be formed in a grid shape in which vertical and horizontal lines intersecting with continuous lines or broken lines, or in a radiation shape using short radiation lines. , And other design changes are made as appropriate.
  • the non-fixed portions 5a and 6a of the liners 1 and 6 cause the air flow generated by the high-speed rotation of the magnetic disk medium 4 to flow.
  • the free ends near the magnetic head inlet openings 10 and 11 are separated from the inner surfaces of the upper and lower shells 1 and 2, that is, the upper liner 15 hangs down, the lower liner 16 rises and the inner and outer circumferences Cleaning is performed by lightly contacting the surface of the magnetic disk medium 4 with a substantially uniform length and area.
  • FIG. 5 is a perspective view of the lower shell of the magnetic disk drive cartridge according to another embodiment, showing only the lower shell 2, but the same applies to the upper shell 1.
  • JP 7 is a perspective view of the lower shell of the magnetic disk drive cartridge according to another embodiment, showing only the lower shell 2, but the same applies to the upper shell 1.
  • the non-fixed portions 5a and 6a of the upper and lower liners 1 and 6 are arranged in a portion substantially opposite to the magnetic head insertion openings 10 and 11 with respect to the rotation center. .
  • the liner 6 is divided right and left at a portion substantially opposite to the magnetic head inlet 11, and a downstream end region of the divided portion of the liner 6 upstream in the rotation direction D of the magnetic disk medium 4 is: It is provided on the non-fixed portion 6 a that is not fixed to the inner surface of the lower shell 2, and the entire surface of the other fixed portion 6 b (cross-hatched area) is fixed to the inner surface of the lower shell 2.
  • the free end and the fixed end of the non-fixed portion 6a are formed substantially parallel.
  • one of the free end and the fixed end may be a line segment passing through the center of rotation, or may be parallel to the dividing line of the liner 6.
  • the non-fixed portions 5a and 6a are provided at positions away from the magnetic head insertion openings 10 and 11 so that the non-fixed portions 5a and 6a Even if the magnetic disk media 4 is slightly displaced by contact with the magnetic head, the magnetic head is restored and flattened while rotating at the magnetic head insertion openings 10 and 11 so that the magnetic head is in contact with the magnetic head. This is advantageous in securing the positional relationship.
  • the non-fixed portions 5a and 6a of the liners 1 and 6 in the embodiment shown in FIG. IB and FIG. 5 have stability so that surface runout or the like does not occur when the magnetic disk medium 4 rotates. In terms of securing, it is desirable to provide the same shape at the same position on the upper and lower surfaces.
  • the floating or hanging height of the non-fixed portions 5a and 6a is set to such a degree as to lightly contact the surface of the magnetic disk medium 4 in the rotating state. To reduce the driving resistance.
  • At least the cut edges on the outer periphery of the non-fixed portions 5a and 6a of the liners 1 and 6 may be subjected to a fiber fixing process for suppressing fluffing and falling off of the fibers.
  • This fiber fixing treatment is performed by applying an adhesive and drying to fix the fibers, or by heating the heat-meltable fiber to thermally fuse the fibers.
  • a chemical dust treatment may be applied to the fiber fixing portion to enhance the dust adsorbing property.
  • This fiber fixing treatment is preferably performed on at least the outer peripheral cutting edge of the non-fixed portions 5 a and 6 a at the portion that comes into contact with the magnetic disk medium 4, and the portions that do not come into contact with the magnetic disk medium 4 are treated. You don't have to.
  • the processing may be performed on the entire periphery of the outer peripheral cut portions of the liners 5 and 6.
  • the liners 5 and 6 may be separated by fixed portions 5 b and 6 b fixed to the inner surfaces of the shells 1 and 2 and non-fixed portions 5 a and 6 a.
  • the b and the non-fixed parts 5a and 6a may be made of different materials.
  • the non-fixed portions of the upper and lower liners 1 and 6 are generated by the air flow generated by the high-speed rotation.
  • the free ends of 5a and 6a are separated from the inner surfaces of the upper and lower shells 1 and 2, and lightly contact the surface of the magnetic disk medium 4 with substantially equal length and area on the inner and outer circumferences.
  • the dust adhering to the surface of the magnetic disk medium 4 has a slight adhesive property, and the upper and lower non-fixed portions 5a and 6a come into contact and collect the dust on the liners 1 and 6.
  • the dust is given a moving energy exceeding its static adhesive force, so that the dust moves in the outer peripheral direction by the centrifugal force of the dust caused by the high-speed rotation of the magnetic disk medium 4, and Due to the rotation of the magnetic disk medium 4, an air flow flowing outward is generated on the surface of the magnetic disk medium 4.
  • the air flow also moves in the outer circumferential direction by this air flow, and is removed outside the recording area 4a to perform cleaning.
  • it is necessary to prevent dust from entering the contact area with the magnetic head so as not to cause dropout.
  • the contact between the non-fixed portions 5a and 6a for the cleaning action and the surface of the magnetic disk medium 4 is a partial contact with the entire magnetic disk medium 4 and the free end rises or hangs down.
  • the drive torque of the magnetic disk medium 4 is small due to the contact, and the high-speed rotation of the magnetic disk medium 4 is stabilized by a small drive motor. It is possible to perform it reliably.
  • FIG. 1C is an exploded perspective view of the upper and lower shells of the magnetic disk cartridge of this embodiment.
  • a filter member 20a is provided on the downstream side of the ventilation path in the third corner part 33, specifically, near the outflow side ventilation port 33b.
  • the filter member 20a is provided in a curved shape such that the upper and lower ends abut on the inner surfaces of the upper and lower shells 1 and 2. Since the air flow through the third corner portion 33 is weak, it is preferable that the filter member 20a has as small a ventilation resistance as possible.
  • porous tetrafluoroethylene resin film Nitto Denko Corporation, Microtex NTF 1133, 1033, etc.
  • porous polyethylene film Nitto Denko Corporation, Breslon BRN 1050 E50B, P50B, P20B, etc.
  • These porous films are provided in such a manner that a film having a coarse density is used in a double or more layered manner, and has a dust collecting function while ensuring air permeability.
  • the porous film or the like may be provided in a cylindrical shape, arranged so that an airflow passes through the inside, and provided so as to collect dust.
  • the filter member 20a It is not essential for the filter member 20a to completely remove the dust contained in the airflow flowing from the media storage unit. If it can be gathered, the function is enough.
  • the magnetic disk cartridge when the magnetic disk medium 4 is rotationally driven by being inserted into the drive device, an airflow from the inner circumference to the outer circumference and directed in the rotation direction is generated with the high-speed rotation.
  • the dust flows along with the airflow so as to roll on the surface of the magnetic disk medium 4, and a part of the dust flows into the inside of the third corner part 33 from the ventilation port 33 a and is included in the airflow. Dust is collected on the filler material 20a. This prevents dust from intruding into contact with the magnetic head and prevents dropouts from occurring.
  • the filler member 20a is preferably disposed in the third corner part 33 because of its structure.
  • the other corner part 31 is provided.
  • 32, 34 may be arranged.
  • the third corner portion 33 has an identification hole 16 formed at the end portion side and a welding projection 15 formed at the corner portion.
  • the usable internal space is large and the filling member 20 is large. a can be arranged, Since the magnetic head media openings 4 are spaced apart from the magnetic head inlet openings 10 and 11, the airflow generated by the rotation of the magnetic disk medium 4 is stable and strong, so the airflow that can be introduced into the corners 33 is also small. This is preferable in that it can be enlarged.
  • the inner space of the second corner 3 2 on the rear right side is narrow due to the installation of the light protector, and the fourth corner 3 on the left front side 3 4 is not suitable in terms of securing the ventilation path because the shirts are installed.
  • the first corner part 3 1 on the front right side there is enough space in the first corner part 3 1 on the front right side, and it is possible to install the filler member 20 a.
  • this first corner part 31 has a magnetic head inserted.
  • the air flowing through the magnetic disk media 4 is disturbed by the air flowing in from the openings 10 and 11 and the inside of the corner 3 1
  • the dust collection effect may be reduced in that the amount of air flowing into the air may be reduced, and a slit-shaped opening may be formed in the front end face, in which case the flow of air inside the air is impeded.
  • the arrangement position of the filler member 20 can be appropriately changed according to the change of the internal structure of each of the corner portions 31 to 34.
  • the identification hole 16 is opened in the third corner portion 33, it is advantageous that the airflow flowing from the inflow side ventilation hole 33a is discharged to the outside through the identification hole 16.
  • the outlet ribs 33b may not be formed in the inner ribs 1b and 2b in some cases. At that time, dust may flow in from the outside through the identification hole 16, but when the magnetic disk medium 4 is rotating, there is no air inflow, and when the magnetic disk medium 4 is not rotating, the dust that has entered enters the airflow. As a result, the possibility of being caught by the filter member 20a before moving to the media accommodating section 30 and sticking to the magnetic disk medium 4 is low. In some magnetic disk cartridges having different recording capacities, one of the identification holes 16 is not opened in the third corner portion 33.

Landscapes

  • Feeding And Guiding Record Carriers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

L'invention concerne une cartouche de disque magnétique dont on améliore la fiabilité de fonctionnement en protégeant le support disque magnétique de la poussière sans accroître le couple du support disque magnétique. Cette cartouche de disque magnétique contient un support disque magnétique (4) monté rotatif dans l'espace défini par un boîtier supérieur (1) et un boîtier inférieur (2). Le boîtier supérieur (1) et le boîtier inférieur (2) sont tous deux équipés d'une garniture (5, 6) sur leur surface interne opposée au support disque magnétique (4). Ces boîtiers supérieur et inférieur (1, 2) possèdent des nervures respectives (1b, 2b) situées à l'extérieur du contour du support disque magnétique, qui permettent de séparer la surface du support (30) des surfaces d'angle (33). Les nervures d'au moins l'une des surfaces d'angle (33) sont découpées de manière à former des évents (33a, 33b) et un piège adhésif (20) conçu pour capter la poussière est fixé à l'intérieur d'au moins l'un des boîtiers au niveau de ladite surface d'angle.
PCT/JP2000/000740 1999-03-16 2000-02-10 Cartouche de disque magnetique Ceased WO2000055855A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11070185A JP2000268522A (ja) 1999-03-16 1999-03-16 磁気ディスクカートリッジ
JP11/70185 1999-03-16

Publications (1)

Publication Number Publication Date
WO2000055855A1 true WO2000055855A1 (fr) 2000-09-21

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Application Number Title Priority Date Filing Date
PCT/JP2000/000740 Ceased WO2000055855A1 (fr) 1999-03-16 2000-02-10 Cartouche de disque magnetique

Country Status (2)

Country Link
JP (1) JP2000268522A (fr)
WO (1) WO2000055855A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003107345A1 (fr) * 2002-06-14 2003-12-24 Koninklijke Philips Electronics N.V. Dispositif permettant le balayage et le nettoyage d'un support d'informations
DE102009002542A1 (de) 2009-04-21 2010-10-28 Robert Bosch Gmbh Optisches Laufwerk sowie Verfahren zum Reinigen eines Plattentellers eines Laufwerks

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8102619B2 (en) 2009-01-07 2012-01-24 Hitachi Global Storage Technologies Netherlands B.V. Airborne particle trap within an enclosure containing sensitive equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4885652A (en) * 1988-07-11 1989-12-05 Minnesota Mining And Manufacturing Company Disk cartridge
JPH02110071U (fr) * 1989-02-14 1990-09-03
JPH10144036A (ja) * 1996-11-13 1998-05-29 Sony Corp ディスクカートリッジ
JPH1145541A (ja) * 1997-07-25 1999-02-16 Mitsumi Electric Co Ltd フレキシブルディスク

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4885652A (en) * 1988-07-11 1989-12-05 Minnesota Mining And Manufacturing Company Disk cartridge
JPH02110071U (fr) * 1989-02-14 1990-09-03
JPH10144036A (ja) * 1996-11-13 1998-05-29 Sony Corp ディスクカートリッジ
JPH1145541A (ja) * 1997-07-25 1999-02-16 Mitsumi Electric Co Ltd フレキシブルディスク

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003107345A1 (fr) * 2002-06-14 2003-12-24 Koninklijke Philips Electronics N.V. Dispositif permettant le balayage et le nettoyage d'un support d'informations
DE102009002542A1 (de) 2009-04-21 2010-10-28 Robert Bosch Gmbh Optisches Laufwerk sowie Verfahren zum Reinigen eines Plattentellers eines Laufwerks

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