JPS58118066A - Magnetic disk driving device - Google Patents

Abstract

PURPOSE:To realize the improved assembly within a limited space with efficient assembling of a magnetic disk driving device, by attaching right and left shaft guides to a projected part provided to a carriage storing a head and then holding these guide shafts with springs. CONSTITUTION:The tip part of a left guide shaft 99 is attached to the upper surface of a rib 71a of an aluminum base main body 71; while the tip of a right guide shaft 100 is attached to the upper surface of a rib 71b of the base main body 71 respectively. In this case, plate springs 103a and 103b are used respectively. At the same time, the rear edge parts of shafts 99 and 100 are put on the upper surfaces of the ribs 71c and 71d of the body 71. A plate spring 104 is attached with a screw to a rib 71e provided between the ribs 71c and 71d.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic disk drive device, and more particularly to an improvement in a head holding adjustment mechanism.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be explained based on the drawings. Broadly speaking, the magnetic disk drive device is composed of a molded chassis part A1 a disk guide mechanism part B1 a collet chuck @ structure part C1 a base part D1 a disk drive motor part E1 and a head mechanism part F as shown in FIG. There is.

The configuration of the molded chassis section A will be explained.

As shown in FIG. 5, the molded chassis section A is composed of a plastic molded chassis body 1 housing a collet chuck mechanism section 01, a base section D1, and a head mechanism section F, and a plastic front panel 2.

The molded chassis body 1 includes a bottom plate portion 1a having a hollow portion.
, left side wall plate part 1b1 right side wall plate part 1c and rear wall plate part 1d
It consists of This mall.

A front panel 2 is attached to the front of a 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 square opening 3a in the center, and left and right groove-shaped openings 3b and 3c extending from the square opening 3a, respectively. An eject button hole 4 is provided below the rectangular opening 3a of the magnetic disk insertion slot 3.

A plastic eject button 5 is arranged in the eject button hole 4. A hook-shaped stop 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 barb 10 into the pin 9 set upright at point a.

The eject button 5 has a gap on both sides of the bottom plate 1a of the molded chassis main body 1, and is mounted on an eject button holder that can be bent up and down. Furthermore, the fluorocarbon 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 consists of a left disk guide mechanism section 21a1 and a right 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 disc moth with! The id mechanism parts 21a and 21b have almost the same configuration.

The configuration of the left disk guide mechanism section 21a 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.
) 23 etc. are attached to an outer guide body 22a 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 and held by a write protect sensor holder (plate spring) 25. The write protect sensor holder 25 has a hole 26 and a curved groove 27 for preventing rotation at the tip, and both are inserted into the pins 28 and 29 provided on the outer guide body 22a, respectively.

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 body 22a.

The collet chuck section C will be explained.

As shown in FIG. 6, the collet 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 3a of the magnetic disk insertion part 3 of the front panel 2, and the shutter operating surface 41a at the lower end thereof protrudes from the molded chassis body 1. The shutter 41 consists of a shutter operating surface 41a, a vertical surface 41b, and a rear flat portion 41C.

As shown in FIG. 6, the first cam body 42 is attached with screws with its tip flat portion 42a in close contact with the lower rear flat portion 41C of the shutter 41. This first cam body 42 has an inclined upper surface portion 42 at the lower front of the flat end portion 42a1.
b1 left side wall portion 42C1 right side wall 42d and rear vertical portion 4
2e, a long axis 43 is provided on the left side wall 42'C, a short axis 44 is provided on the right side wall 42d, and two sets of protrusions 45 and 46 are integrally provided in the upper and lower portions of the rear vertical portion 42e. (See Figure 1).

Further, a hole 42f is provided in the center of the inclined upper surface portion 42b of the first cam body 42. The fulcrum of the first cam body 42 is located on the center line of the long axis 43 and the short axis 44.

The upper surface of the cam body 47 of the plastic confectionery 2 is in the shape of a square, and its tip 47a is formed into a round bar shape.
．． It is held by 46.

The second cam body 47 has a round bar-shaped tip portion 47a1 a rear sloped portion 47b1 a front center sloped wall portion 47c1 a rear wall portion 47d1 a left side wall portion 47e1 a right side wall portion 47f;
e and 47f, respectively, and a protrusion 50.51 having axes 5-Oa and 5'la, respectively, is integrally provided on the rear wall 47d (see Fig. 1).
.

A left cam base 52 and a right cam base 53 made of plastic are arranged on the left and right sides of the first cam body 42 and the second cam body 47, respectively. This left cam base 52
are the long axis 43 of the first cam body 42 and the second cam body 47
The right cam base 53 is connected to the shaft 48 of the first cam body 4.
The vertical and horizontal movements of the short shaft 44 of the second cam body 47 and the shaft 49 of the second cam body 47 are restricted, and only rotational and sliding movements are permitted (see FIG. 1).

As shown in FIG. 6, an upper index 54 is attached to the left cam base 52. As shown in FIG. A sensor (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 senna holder 5G has a hole 56a1 and a rotation prevention groove 56b.
are provided, both of which are bins 54a of the upper index 54,
54b, 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 molded chassis body 1.
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 screws.

The first cam body 42 is supported by a spring 59 having one end on the upper part of the beam 58 and the other end on the spring attachment body 42g of the first cam body 42.

This spring 59 is connected to the slanted upper surface portion 42b of the first cam body 420.
It passes through a hole 42f provided in (see FIG. 2).

Thus, the beam 58 is connected to the first . Second cam body 42.4
While the beam 58 fulfills the role of the bipolar base of 7, the guide bin 60 is press-fitted into the beam 58 and planted therein. This guide bin 60 has a collet 61 mounted below.

A hollow shaft 62 is provided on the outer periphery of the collet bin 60 so as to be slidable up and down. A Gillette ring 63 is attached to the outer periphery of the hollow shaft 62 via a collet pushing spring 64 to support the collet 6.
It is attached 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 can slide up and down the guide bin 60.

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

The bent portions 63a, 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 aluminum base body 71 has a gap left and right in the center of the interior of the molded chassis body 1, and extends approximately in the front-rear direction. The front part of the aluminum base body 71 is attached to the rib 1e of the molded chassis body 1, and the rear part is attached to a bottle set up at the rear of the molded chassis body 1 with screws.

A recess 72 having a through hole 72a in the center is provided in the center of the front portion of the aluminum base body 71 (9). The cylindrical portion 72 surrounds the four portions 720 and the through hole 72a.
It has b.

A collet 6 is provided in the recess 72 of the aluminum base body 71.
A hub 73 that cooperates with 1 is housed.

=Ilvcrs ball bearing 74 of hub 73 is attached.

At the rear of the aluminum base body 71, a head mechanism 4F,
A step motor etc. can be attached.

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

A sensor (L[) is located at the rear left side of the aluminum base body 71.
) 77 and a phototransistor sensor 78 are integrally held by a sensor holder 79.

The sensors 77 and 78 are 'o o' sensors.

The disk I pivoting motor section E will be explained.

As shown in FIG. 8, the disk drive motor section E includes a ball bearing 81, a steel plate yoke 82, a phenol resin substrate 83 having a winding section 83a, a post 84, a motor (10 ) It is composed of a rotor 85 made of magnets and iron plates, and a heat dissipation part 86 made of aluminum.

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 attached to the bottom surface of the yoke 82 in close contact. 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 883.

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 having an upper head 91 is mounted below a plastic upper head mounting arm 93 (11). 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 94a and an inclined flat plate portion 94b.

The carriage 97 that houses the button 96 on which the lower head 95 is placed is connected to the carriage body 9 as shown in No. 91'J.
8 and a steel belt e attached portion 99.

On the left side of the carriage body 98 are upper protrusions 98a and 98b extending in parallel;
A lower protrusion 98c extends downwardly in the middle of b.
is configured.

As shown in FIG. 11, these upper protrusions 98a.

A curved hollow part is formed in the lower part of the lower protrusion 98b, and the lower protrusion 98c is formed of an inner curved part and an outwardly facing flat part connected to the curved part.

Further, the carriage main body 98 has a protruding body 98d on its right side, which has a curved hollow part (12) in the lower part that projects integrally, and a mounting body 98e that is open downward and has a U-shaped cross section. There is.

Below this carriage body 98, two stainless steel bar-shaped guide shafts 99.degree. 100 are attached using a carriage assembly fixing spring 101 having a V-shaped tip.

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 hollowed out portion 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 98a. 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 99, 100, which are attached to the carriage 97 assembled using the carriage assembly fixing spring 101 in this way, are connected to the aluminum base via the plate (13) and springs 103a, 103b, 104. It can be attached to the main body 71.

1. The tip of the left guide shaft 99 is attached to the upper surface of the lip 71a of the aluminum base body 71, and the right guide shaft 10
The tip of each plate spring 103a is attached to the upper surface of the lip 71b of the aluminum base body.

103b (see Fig. 7).

- The rear end of the blade one side guide shaft 99 and the rear end of the right side guide shaft 100 are respectively connected to the aluminum base body 7.
The leaf spring 10 is placed on the upper surface of the lips 71c and 71d of
4 to the lip 71e provided between the lips 71c and 71d of the main body base 71 (the seventh
(see figure).

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

Head access stem that moves 1.8 degrees per pulse (14
) Pulley 106 attached to the tip of the shaft of the knob motor 105
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 base 71. The tip of the boss 108 is inserted into a hole 107a 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. A locking piece 107b provided on the trench pail 107 locks on the eject slider 31.

Next, the operation of the collet chuck mechanism section of the magnetic disk drive device will be explained. Figure 12 shows the state of the mechanism when a disk (media) is inserted into the shutter 4.
The first operation surface 41a is placed horizontally, and the first cam body 42,
The second cam body 47 (15) is also in a substantially horizontal state. The collet ring 63 is pushed down by the second cam body 47. The collet 61 and the hub 73 are in an engaged state.

When no disk (media) is inserted, the state is as shown in FIG. 13. The operation surface 41a 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 disengaged.

As described above, according to the present invention, the left and right guide shafts are attached to the protrusion provided on the carriage housing the head,
Furthermore, since the left and right guide shafts are held by springs, it is possible to obtain a magnetic disk drive device that is easy to assemble and can be efficiently arranged in a limited space.

[Brief explanation of drawings]

1(IlidfJ4=4+t, bright(/,)-j(MO1
ull/,cn1',,ii1')k7'-1J,A plan view of the device, Figure 2 is a sectional view II-IIX in Figure 1 (
16) Fig. 3 is a right side view of Fig. 1, Fig. 4 is an exploded perspective view of the magnetic disk, Fig. 5 is an exploded perspective view of the mold chassis section and disk guide mechanism section, and Fig. 6 is an exploded perspective view of the collet chuck mechanism section. 7 is an exploded perspective view of the head mechanism section and base section, FIG. 8 is an exploded perspective view of the base section and disk drive motor section, FIG. 9 is a plan view of the head mechanism section, and FIG. 10 is an exploded perspective view of the head mechanism section and base section. The figure is a sectional view taken along the line XX in FIG. 9, FIG. 11 is a sectional view taken along the line MM in FIG. 9, and FIGS. 12 and 13 are explanatory diagrams of the shutter operating section. 92...head, 97...carriage, 99,10
0...Guide shaft, 1o1...Spring. Agent Patent attorney Akio Takahashi (17)

Claims (1)

[Claims] 1. A magnetic disk drive device in which left and right guide shafts are attached to protrusions provided on a carriage that houses a head, and the left and right guide shafts are further held by springs.