JPS58115653A - Magnetic disk driver - Google Patents

Abstract

PURPOSE:To obtain a magnetic disk driver equipped with an efficient disk ejecting mechanism. CONSTITUTION:The magnetic disk driver consists of a molded chassis part, disk guide mechanism part, collet chuck mechanism part, base part, disk driving motor part, and head mechanism part. The disk guide mechanism part B consists of a left disk guide mechanism part 21a and a right disk guide mechanism part 21b arranged inside of left and right side wall plate parts 1b and 1c. A disk guide body 22 consists of an external guide body 22a fitted with a write protection sensor (LED) 23, etc., for detecting whether a recording medium is inserted or not, and a crank-shaped internal guide body 22b. Then, a press spring 30 for operating an ejection button 5, slider 31 for ejection, and slider drawing spring 32 are provided over the external disk body 22.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic disk drive, and more particularly to a magnetic disk drive equipped with an improved magnetic disk ejection mechanism.

An embodiment of the present invention will be described below based on the drawings. The magnetic disk drive device is roughly divided into, as shown in FIG. 4, a mold chassis section A1 a disk guide mechanism section B1 a collet chuck mechanism section C1 a base section D1 a disk drive motor section E1 and a head mechanism section F. .

The configuration of the molded chassis section will be explained.

As shown in FIG. 5, the molded chassis section is composed of a plastic molded chassis body 1 housing a collet chuck mechanism section C1, a base section D1, and a head mechanism section F, and a plastics front panel 2.

The molded chassis body 1 has a bottom plate portion 1m having a hollow portion.
, left side wall plate part 1b, right side wall plate part 1c, and rear wall plate part 1d.
It consists of A front panel 2 is attached to the front of this molded chassis body 1.

As shown in FIGS. 3 and 5, a magnetic disk insertion slot 3 is provided in the center of the front panel 2. As shown in FIGS. The magnetic disk insertion slot 3 is composed of a large rectangular opening 3m in the center, and left and right groove-shaped openings 3b and 3c extending beyond the rectangular opening 3m, respectively. An eject button hole 4 is provided below the rectangular opening 3m of the magnetic disk insertion slot 3.

A plastic eject button 5 is arranged in the eject button hole 4. A hook-shaped locking portion 6 facing the square opening 3a of the magnetic disk insertion slot 3 is integrally provided above the eject button 5.

Further, a cylindrical portion 8 projecting downward and having a through hole 7 in the center is integrally formed at the left end of the eject button 5. This cylindrical portion 8 is connected to the bottom plate 1 of the molded chassis body 1.
It is attached by inserting the through hole 7 together with the spring 10 into the pin 9 which is set upright at g.

This eject button 5 is placed on an eject button/button mounting part 11 which has a gap on both sides of the bottom plate 1 of the molded chassis main body 1 and can be bent up and down. Furthermore, the LED 12 is inserted into the slit 13 of the front panel 2 and attached.

Next, the disc guide mechanism section B will be explained.

The disk guide mechanism section B includes a left side disk guide mechanism section 21a1 and a right side disk guide mechanism section 21b, which are arranged inside the left and right side wall plates 1b and 1c of the molded chassis body 1, respectively. The plastic left and right disk guide mechanisms 21a and 21b have substantially the same configuration.

The configuration of the left disk guide mechanism section 211 will be described. The plastic left disk guide body 22 is arranged close to the inside of the left side wall plate 1b of the molded chassis body 1. The left disk guide main body 22 has a write protect sensor (LED) that detects whether or not a recording medium is inserted.
) 18 etc. # consists of an outer guide body 22 to be attached and a crank-shaped inner guide body 22b.

The write protect sensor 23 is attached to the outer guide body 22a.
It is inserted into a groove 24 provided in K and held by a write protect sensor holder (IE spring) 25. The Ridebu 4 Tect sensor holder 2s has a hole 26 and a curved surface #127 for preventing rotation at the tip, both of which are connected to the outer guide body 221.
are inserted into the pins 28 and 29 provided in the respective parts.

A push spring 30 for operating the eject button 5, an eject slider 31, and a slider tension spring 32 are provided above the outer disk main body 22m.

The collet chuck section C will be explained.

As shown in FIG. 6, the collect chuck section C mainly consists of a shutter, a cam mechanism section, a beam, and a collet.

A part of the plastic crank-shaped shutter 41 is inserted into the opening 3m of the magnetic disk insertion slot 3 of the front panel 2, and the shutter operation surface 41m at the lower end thereof is actually drawn on the molded chassis body 1. This shutter 41 stands apart from the shutter operating surface 41a1, the vertical surface 41b, and the rear plane portion 41C.

As shown in FIG. 6, the first cam body 42 has its tip flat portion 42m tightly attached to the lower part of the rear flat portion 41C of the shutter 41 with screws. This #11 cam body 42 has a flat end portion 421° and an inclined upper return portion 4 which is downward in front.
2b1 left Confucian wall section 42C1 right Confucian wall 42d and rear vertical section 42@, the left side wall section 42c has a long axis 43, the right side wall section 42d has a short axis 44, and the rear straight section 42e has a vertical section, respectively. Two sets of protrusions 45 and 46 are integrally provided (see FIG. 1).

Further, a hole 42f is provided in the center of the inclined upper surface @42b of the first cam body 42. Note that the first cam body 42
The fulcrum of is on the center line of the major axis 43 and the minor axis 44.

The upper surface of the second cam body 47 made of plastic is shaped like a bow, and its tip 47 is shaped like a bar.
This round bar-shaped tip 47m is held between protrusions 45 and 46 of the first cam body 42.

The second cam body 47 has a round bar-shaped tip 47m, a ridge slope portion 47b1, a front central slope wall 47C1, a rear wall portion 47d1, a left @ wall portion 47C1, a right wall portion 47f, and left and right side wall portions 47.
The rear wall portion 47de'C is integrally provided with a protrusion 50, 51 having a shaft 5 (1, 51&), respectively (see Fig. 1). .

A left cam base 52 and a right cam base 53 made of plastic are disposed on the left and right sides of the cam body 42 and the second cam body 47 of the housing 1, respectively. This left cam base 52
is the long axis 43 of the first cam body 4z and the second cam body 47
and the right cam head 53 is connected to the first cam body 4.
Short 1) 1144 and the shaft 49 of the second cam body 47 are restricted from moving vertically and horizontally, and are only allowed to rotate and slide (
(See Figure 1).

As shown in FIG. 6, an upper index 54 is attached to the left cam base 52. As shown in FIG. A senna (LED) is installed on the upper index 54 that serves as a reference for extracting this position signal.
55 is held by a sensor holder (plate spring) 56.

This sensor holder 56 has a hole 561, a rotation stopper groove 56b
are provided, and both are bins 541 of the upper index 54,
54b and K are inserted respectively.

Note that an eject cam 57 is attached to the tip of the long shaft 43 of the first cam body 42.

On the other hand, a beam 58 is placed in front of the upper part of the mold chassis main body 10.
is provided so as to extend from side to side. Both left and right ends of this beam 58 are attached to the mold chassis body 1 with screws. Further, left and right cam bases 52 and 53 are attached to this beam 58 with screws, and the first cam body 42 and the second cam body 47 are supported. Furthermore, an upper index 54 is attached with a screw.

The first cam body 42 is supported by a spring 59 which has one end fixed to the upper part of the beam 580 and the other end fixed to the spring attachment body 42g of the first cam body 42.

This spring 59 is connected to the inclined upper part 42b of the cam body 42 of the rattan 1.
It passes through a hole 42f provided in the hole 42f (see Fig. 2, jl).

Thus, the beam 58 is connected to the first . Second cam body 42.4
The beam 58 serves as a mounting base for the guide beam 7, and the guide beam 0 is press-fitted into the beam 58 and erected therein. This guide bin 60 has a collet 61 attached to its lower part.

A hollow shaft 62 is provided at the outer part of the collet bin 60 so as to be slidable up and down. An L collet ring 63 is attached to the outer periphery of the hollow shaft 62 via a collet push spring 64 to support the collet 6.
It is mounted above 1.

A washer 65 and a ball bearing 66 are provided between the collet 61 and the collet push spring 64. An E-ring 67 is provided between the collet 61 and the hollow shaft 62. The collet 61 attached to the hollow shaft 62 is capable of sliding up and down the guide bin 60.

Folding portions 63a and 63b are provided at the left and right distal end portions of the collet ring 63, respectively.

The bent portions 63m and 63b are the shafts 50a provided on the protrusion 50.51 of the second cam body 47.

50b (see Figure 1).

Next, the base portion will be explained.

As shown in FIG. 7, the Alice main body 71 has a gap on the left and right in the center of the interior of the molded chassis main body 1, and extends approximately in the front-rear direction. The front part of the aluminum base body 71 is attached to the glue IC of the molded chassis body 1 with screws, and the rear part is attached to a bottle installed at the rear of the molded chassis body 10 with screws.

A recess 72 having a through hole 72m in the center is provided in the front center of the aluminum base body 710. The periphery of the through hole 72m of the recess 72 has a cylindrical portion 72b.

The concave portion 72 of the Kono aluminum base body 71 has a pret 6.
A hub 73 that cooperates with 1 is housed.

A ball bearing 74 is attached to the shaft of the hub 73.

At the rear of the base body 71, a head mechanism F1 step motor and the like are mounted.

Lower index 75 on the front left side of the aluminum base body 71
is arranged, and a phototransistor sensor 75 is held by a sensor holder 76.

At the rear left side of the aluminum base body 71, there is a
D) 77, a phototransistor sensor 978 is integrally held by a sensor holder 79.

This Senna 77.78 is “00# Senna.

The disk drive motor section E will be explained.

The disk drive motor section EFi, as shown in Fig. 8,
A ball bearing 81 is located below the base body 71.
It is composed of a yoke 82 made of a steel plate, a phenol resin substrate 83 having a winding portion 83m, a boss 84, a rotor 85 made of a magnet and a steel plate, and a heat dissipation component 86 made of Al2.

As shown in FIG.
The ball bearing 82 is fitted into the shaft of No. 3 below the ball bearing 82. The yoke 82 is attached closely to the bottom surface of the aluminum base body 71, and a part of the aluminum base body 1 is also used as a housing.

The substrate 83 is mounted in close contact with the bottom surface of the yoke 82. Further, the boss 84 is housed in the central recess 85a of the rotor 85, and the heat dissipation component 86 is screwed to the board 83.

Next, the head mechanism section F will be explained.

As shown in FIG. 7, the head mechanism section F is mainly composed of an upper head section, a carriage section having a lower head, and a head access motor section.

A gimbal 92 with an upper head 91 is mounted below a plastic upper head mounting arm 93. A U-shaped spring 94 for maintaining the contact force of the upper head 91 is screwed above the upper head mounting arm 93. The spring portion of this U-shaped spring 94 consists of a horizontal flat plate portion 94m and an inclined flat plate portion 94b.

The carriage 97 that houses the button/96 on which the lower head 95 is placed is composed of a carriage body 98 and a steel belt attachment part 99, as shown in FIG. The left side of the carriage body 98 includes upper protrusions 98m and 98b that are sharpened in parallel, and a lower protrusion 98c that extends downwardly between the upper protrusions 98m and 98b. .

As shown in FIG. 11, these upper protrusions 981°98
A curved hollow part is formed at the lower part of b, and the lower protrusion 98c is formed of an inner curved part and an outwardly facing flat part connected to this curved part.

Furthermore, the carriage main body 98 has, on its right side, a projecting body 98d that projects integrally and has a curved cutout at its lower part, and a mounting body 98e that has a U-shaped cross section and is open downward.

Below this carriage body 98, two left and right side bar-shaped guide shafts 99.degree. 100 made of stainless steel are mounted using V-shaped carriage assembly fixing springs 101 at the ends.

The left guide shaft 99 is inserted and held between the cutout portions of the upper protrusions 98a and 98b of the carriage body 98 and the lower protrusion 98c. On the other hand, the cloth side guide shaft 100
is inserted into the recessed part of the protruding body 98d of the carriage body 98.

Then, the distal end of the carriage assembly fixing spring 101 is positioned below the right attachment body 98e of the carriage body 98, and the other distal end is screwed to the upper protrusion 98m. In addition, the steel belt attachment part 99 of the carriage 97
A steel belt 102 for head access is screwed to.

The left and right guide shafts 7) 99, 100 to which the carriage 97 assembled using the carriage assembly fixing springs 101 are mounted are plate springs 1031, 103.
b, and is attached to the aluminum base body 71 via 104.

First, the tip of the left guide shaft 99 is attached to the upper surface of the lip 71a of the aluminum base body 71.
The 0Ω tip has a plate 1 (1m) on the top surface of the lip 71b of the aluminum base body.

It can be installed using 1OSB (see No. 71!).

On the other hand, the rear end I of the left guide shaft 99! and the right side guide shirt) 1000 rear end portions are placed on the ribs 71C and 71 of the aluminum base body 71 (10), and the plate spring 104 is attached to the rib 71e provided between the ribs 71C and 71d of the body base 71t. It can be removed by screwing it on (see No. 1Q).

As shown in FIG. 7, the steel bell 102 is made of a -& plate material. The steel belt 102 has a cutout groove 102m formed at one end, a tip end 102b passes through the cutout groove 102a, and a pulley fixing ring 103C, which is a circular folded part, is formed in the center.

A pulley 106 attached to the tip of the shaft of a step motor 105 for head access that moves L8 degrees with one pulse is inserted into the pulley fixing ring 103 of the steel belt 102 and screwed through the fixing reinforcing tool 106.

Also, a pail 10 made of non-magnetic metal has the function of pushing up the upper head 91 when the magnet does not operate.
7 is provided on the rear left side of the aluminum pace 71. The tip of the boss 108 is inserted into a hole 1071 provided in the pale 107.

This boss 108 is urged upward by a spring 110 between this boss 108 and a plunger magnet 109 screwed to the aluminum base body 71. Further, a locking piece 107b provided on the pail 107 is locked to the eject slider 31.

Next, the operation of the collet chuck mechanism section of the magnetic disk drive device will be explained. FIG. 12 shows the state of the mechanism when a disk (media) is inserted, the operating surface 41 of the shutter 41 is placed horizontally, and the first cam body 42 is placed horizontally.
, the second cam body 47 is also now in a horizontal state. Second
The collet ring 63 is pushed down by the cam body 47 . The collet 61 and the hub 73 are in an engaging portion.

When no disk (media) is inserted, the state is as shown in FIG. 13. The operation surface 41m of the shutter 41 is pushed up, the first cam body 42 is pushed down, and the second cam body 47 is pushed up.

At this time, the collet ring 63 is pushed up by the collet pushing spring 64, the hollow shaft 62 and the collet 61 are pushed up, and the collet 6
1 and the hub 73 are released.

As described above, according to the present invention, there are magnetic disk guide mechanisms arranged on the left and right sides of the molded chassis, a rod provided on one of the disk guides for transmitting a mechanical signal from the shutter to the pail, and a rod for inserting the magnetic disk. Since a disk ejecting mechanism consisting of a slider that slides smoothly and a means for holding the pail and slider together is provided, a magnetic disk drive device equipped with an efficient disk ejecting mechanism can be obtained.

[Brief explanation of drawings]

FIG. 1 is a plan view of a magnetic disk device showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, FIG. 3 is a right side view of FIG. 1, and FIG. 4 is a magnetic disk drive. Exploded perspective view of the disk, No. 5
Figure 6 is an exploded perspective view of the mold chassis section and disk guide mechanism section, Figure 6 is an exploded perspective view of the collet chuck mechanism section, Figure 7 is an exploded perspective view of the head mechanism section and pace section, and Figure 8 is an exploded perspective view of the pace section and FIG. 9 is an exploded perspective view of the disk drive motor section, FIG. 9 is a plan view of the head mechanism section, FIG. 10 is a sectional view taken along line X-X in FIG. 9, and FIG. 11 is taken along line XI-M in FIG. 9.
The cross-sectional view, FIG. 12, and FIG. 13 are explanatory diagrams of the shutter operating section. 1...Shark, 21a, 21. b...Disc guide, 31...Slider, 107...Pail.
-to,, :29

Claims (1)

[Claims] 1. A magnetic disk guide mechanism placed on the left and right sides of the molded chassis, a rod provided on one of the disk guides to transmit a mechanical signal from the shutter to the pale, a slider that slides when the magnetic disk is inserted, and the above-mentioned pale and slider. What is claimed is: 1. A magnetic disk drive device characterized by comprising a disk ejecting mechanism consisting of a retaining means.