JPH02161650A - Disk device - Google Patents

Abstract

PURPOSE:To attain miniaturization, thinning, and light weight by applying brake on the movement of a cassette when it is inserted and ejected by a first elastic member always functioning in a direction to close an aperture part against a shutter, and a second elastic member functioning in the direction to close the shutter only when the inserting operation and ejecting operation of the cassette are performed. CONSTITUTION:The first elastic member 125 which always functions in the direction to close the aperture part against the shutter 122, and the second elastic member 123 which function in the direction to close the shutter only when the inserting operation and ejecting operation of the cassette 150 are performed are provided. And the brake is applied on the movement of the cassette 150 when it is inserted and ejected by the first and second elastic members 125 and 123 via the shutter 122. Therefore, it is not required to attach a cassette braking mechanism at a disk ejecting mechanism, and the disk ejecting mechanism can be formed with the one with simple structure and not taking much space. In such a way, the miniaturization, the thinning, and the light weight of a device can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk device that records or reproduces information on or from a disk by rotating a disk as a recording medium.

[Prior Art] A typical example of this type of device is a floppy disk device (hereinafter abbreviated as FDD) that magnetically records or reproduces information on a magnetic disk of a flexible disk-shaped magnetic recording medium called a floppy disk. In FDD, a magnetic disk can be inserted and ejected,
A magnetic disk is rotated by driving a motor, and a magnetic head is brought into sliding contact with the magnetic disk to perform recording and reproduction. The structure of an FDD consists of a base that supports each component of the FDD, a disk insertion and ejection mechanism that inserts and ejects a magnetic disk, a disk rotation drive mechanism that rotates the magnetic disk using a motor, and a magnetic head that rotates the magnetic disk. A head seek mechanism that moves the head to an arbitrary track position along the radial direction, and a head load mechanism that loads and unloads the magnetic head onto and from the disk are provided. In addition to this, there is also a main control circuit board equipped with a control circuit for controlling the entire FDD.
A drive control circuit for the disk drive dryer is provided.
A control circuit board, a connector for interface with host equipment, a connector for power supply, etc. are provided.

Such FDDs are used as external storage devices for host electronic devices such as personal computer beaters and word processors, and can also be configured as independent units1, but in most cases they are not included in the main body of the host electronic device. It is designed to be imitated. In recent years, electronic devices in which F'DDs are incorporated have become smaller and more portable, and there is a strong demand for FDDs to be smaller, thinner, and lighter.

[Problems to be Solved by the Invention] Incidentally, a conventional FDD disk ejection mechanism generally employs a structure in which a disk cassette containing a disk is pushed out by an eject lever biased by a spring. When the disk cassette is ejected, the entire disk cassette pushed by the eject lever jumps out of the disk insertion slot provided with the shutter of the FDD and falls out.
In order to prevent this from happening, a structure is often used that includes a brake lever that brakes the disc cassette in conjunction with the eject lever. However, such a disk ejection mechanism has a complicated structure and takes up space, making it difficult to
This becomes an obstacle in making the device smaller, thinner, and lighter.

Therefore, an object of the present invention is to provide a disk ejecting mechanism not only for FDDs but also for disk devices with a simple structure that does not take up much space so that the disk device can be made smaller, thinner, and lighter, and also to eject a disk cassette. The objective is to be able to brake the disc cassette reliably.

[Means for Solving the Problems] In order to solve the above problems, the present invention has an opening for inserting and ejecting a cassette containing a disk as a recording medium, and the opening can be opened and closed. In a disk device provided with a rotatable shutter, the first elastic member acts on the shutter in a direction that always closes an opening, and the opening is closed only during an insertion operation and an ejection operation of the cassette. A second elastic member acting in the closing direction is provided, and a structure is adopted in which the first and second elastic members apply braking to eight shifts during insertion and ejection of the cassette via the shutter.

[Function] According to this structure, the first and second elastic members perform braking when ejecting the disk cassette, so that
It is not necessary to attach a cassette braking mechanism to the disc ejection mechanism, and the disc ejection mechanism can be made to have a simple structure and take up less space.

In addition, the first and second elastic members act on the shutter only when the cassette is inserted and ejected, so that the cassette can be reliably braked with a strong force. When the cassette is not inserted or ejected, that is, when the cassette is attached, only the first elastic member acts on the shutter, and no large load is applied to the cassette.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. In this embodiment, for the sake of convenience, a floppy disk drive device (hereinafter referred to as FDD) which is incorporated into an electronic device such as a computer or a word processor to record and reproduce information will be described as an example.

As shown in FIGS. 1A to 1D, the FDD of the present invention is formed from a small and thin casing. The reference numeral 100 in the figure is a base that supports the constituent members of the disk device, and has a U-shaped cross section with an open top.
It is made of metal or the like, and in this embodiment, this base forms the bottom surface of the FDD, and all of the various constituent members are housed between this base and a shield cover as a lid described later.

FIG. 1(C) shows the back side of the FDD, and the bottom mounting portions 101 for attaching to host equipment such as computers and word processors are provided at three locations on the rectangular back surface as through holes for screw fixing. It is formed. These three bottom mounting points are supplemented by a rectangular neck, and a notch 102 is formed as a relief for mounting. In other words, the number of attachment points, which were conventionally provided at four locations, has been reduced to three, and the remaining one attachment location is formed as a recess.

The base 100 is notched or cut into various shapes in order to attach various components of the disk device, but the kneading will be explained each time as necessary.

The base 100 has a round notch near its center, into which a stator yoke 111 made of a magnetic material such as an iron plate provided on the underside of a stator 110 of a disk drive motor, which will be described later, is fitted and fixed flush with the base 100. ing.

In particular, as shown in FIG. 3 CB) and FIGS. 4 (A) to (D), the stator yoke 11 is flush with the base and the lower surface of the base.
A PCB (printed circuit board) 300 provided with a Dr) motor drive control circuit (not shown) is placed on the top surface of the PCB 1. In order to reduce the thickness of the FDD, an opening 300 is formed in the portion of the PCB that faces the opening 115 of the DD Chiyo 110.
As can be seen from Figure 1, the opening 300 facing the opening 300 of the PCB 300 is configured to face the DD motor. Coils 1 and 2 that excite the DD generator are arranged at equal angular intervals of, for example, 6 m, and the internal wiring of the coils is connected by, for example, soldering to a pattern 112a for coil terminal connection formed on the coil side of the FG PCB. The coil 112 and the motor drive control circuit on the PCB 300 are connected by directly connecting the coil terminal to the PCB 300. Connect the coil terminal (coil terminal) of the coil 112 to the PCB 300 without using a separate lead wire or the like.
By connecting directly to the motor drive control circuit above, cost and space savings can be achieved. Further, two Hall elements 113 are arranged between the coils 112 to detect the excitation switching timing of the coils. The terminal portion of the Hall element 113 is soldered to the PCB 300, and the detection portion is connected to the rotor magnet 115a.
The opening 300 protrudes from the PCB 300 to face the
It is located within a.

The DD motor 110 has a stator yoke 111 fixed integrally with the base 100 at the lower part, and a housing 111b that accommodates a bearing 111a in the stator yoke.
is fixed. A spindle shaft 114 of the DD motor is supported in the center of this bearing, and a rotor yoke 115 is fixed to the upper part of this spindle shaft 114.

A magnet 115a is fixed to the back side of the rotor yoke 115, and the coil 11
It is arranged to face 2. In addition, Fig. 4 (D
), an FG (frequency generator) pattern 112b is provided on the top of the coil 112 to detect the rotation speed of the coil, and this FG pattern and the driving circuit board 300 is also connected, for example, by soldering.

On the front side of the base 100 in the figure is a disk cassette 150.
The front panel 120 has an insertion/ejection port of (=
Both side surfaces 100a of the U-shaped profile of the base 100 are connected on one side to form the front surface of the casing.

Furthermore, as shown in FIGS. 5(A) and 5(B), a shutter 122 is attached to the inside of the front panel 120 to close the cassette insertion/ejection port 121 when not in use to prevent foreign matter such as dust from entering. There is. This shutter has a bearing provided above the cassette insertion/ejection port 121.
24 so as to be rotatable, and furthermore, it is provided with a downward rotational habit that always closes the cassette insertion/ejection port via a weak coil spring 125 as a first elastic member. Therefore, when no external force is applied, this shutter always hangs downward and the cassette insertion/ejection port 1
21 are closed. A brake spring (plate spring) 12 as a second elastic member is located above the shutter 122.
3 is fixed at one end to the inside of the front panel 120. The brake spring 123 is made of a material with a relatively large elastic modulus and is bent downward as shown in the figure, and when the cassette is attached and a cassette guide (described later) is pressed downward, the brake spring 123 bends downward as shown in the figure. The tip of the cassette does not reach the shutter 122, but comes into contact with the shutter 122 only when loading and unloading the cassette, and biases the shutter 122 in the closing direction. The elastic modulus of this brake spring is selected to provide a stronger spring than the coil spring 125.

Next, Figure 6, Figure 7 (A) = (C), Figure 8 (A)
, (B), the disk attachment/detachment and head loading mechanism will be explained.

In the FDD device of this embodiment, the disk is chucked and the magnetic head is loaded by loading the disk cassette 150, and the magnetic head is unloaded and the disk cassette is ejected by operating the eject button.

In the figure, the disk cassette (
A cassette (hereinafter abbreviated as a cassette) 150 is loaded and discharged.

An ejector, generally designated by reference numeral 160, is provided inside the base 100 having a U-shaped cross section. Furthermore, a slide brake (162) is disposed on the base 100 so as to be able to slide on the base in directions A and B, guided by a plurality of bent portions 100m protruding from predetermined positions on the base. A notch 162a is formed in a part of the slide plate 162. With the entire tension coil spring 162b facing this notch 162a, one end of the tension coil spring 162b is fixed to the base 100, and the other end of the tension coil spring 162b is attached to the slide plate 16.
It is attached to 2. This tension coil spring 16
2b in the B direction, the slide plate 162 is held in a predetermined position on the base 100 as will be described later, and the slide plate 162 is Operation button (eject button) 1 integrated into the middle front end
61 pushes the tension coil spring 162
It can slide in the direction A with respect to the base 100 against the bias of b.

Further, as shown in FIGS. 8(A) and 8(B), guide plates 162d provided perpendicularly on both sides of the slide plate 162 have guide grooves 162e formed therein. As is clear from the figure, the outer end portion of the guide groove 162e is parallel to the base 100 and is formed to descend obliquely from there.

Similarly, FIGS. 8(A) and 8(B) show the cassette guide 152.
The side surface of the cassette guide 152 is not shown (see also FIG. 3(A)).The cassette guide 152 accommodates and guides the cassette 150, and its shape is formed into a thin housing that fits perfectly within the base 100. , the lower surface is cut out over almost the entire area so that the cross section is almost U-shaped.

Guide grooves 162e formed in the guide plates 162d of the slide plate 162 on both sides of the cassette guide 152
A dowel 152a is provided to protrude outwardly at a position where the dowel 152a is engaged with the dowel 152a. Furthermore, dowels 152b are protruded from the center of both sides of the cassette guide 152, and are fitted into guide grooves 100C formed on both sides 100a of the base 100.

An ejector 160 is attached near the rear end of the slide plate 162. That is, a shaft 160a for supporting the ejector 160 is provided protruding near the end of the base 100 on the side opposite to the front panel 120 side. An ejector 180 is supported on the shaft 160a so as to be rotatable about the shaft 160a, with an ejector spring 164 loaded therein. One end of the ejector spring 164 is locked to the ejector 160, and the other end is locked to the base 100.
A spring retainer formed on the side surface 100a of the ejector is housed in the side surface 100a, thereby giving the ejector a counterclockwise rotational behavior in the figure.

In particular, as is clear from FIGS. 7(A) and 7(B), the ejector 160 has an arc-shaped base I Bob and an arm portion 160C.
The arm portion 160C is provided with a cassette shutter opening and pushing arm 160d. The base side end surface of the arc-shaped base 160b is the base side surface 10.
0a to regulate the standby position of the ejector 160.

A protruding latch portion 162C is formed at the end of the slide plate 162 on the ejector 160 side. As shown in FIG. 7(A), this latch portion 162C is caught on the base portion 160b of the ejector 160 in the standby position, thereby causing the base 100 and the slide plate 162 to
The slide plate 162 is maintained in the latched state against the bias in the direction B of the tension coil spring 162b stretched between the two. When the ejector 160 is moved to the operating position by the cassette 150, as shown in FIG. Slide in direction B.

Next, the head seek mechanism will be explained. As shown in FIGS. 9 and 10, a rear wall 100b is integrally formed on the opposite side of the base 100 from the front panel 120, standing vertically from the bottom surface of the base 100. As shown in FIGS. The stepping motor 1 is connected to the hole formed in the rear wall 100b.
A screw shaft 131 directly connected to the output shaft of the screw shaft 130 is inserted through the screw shaft 131, and the end of the screw shaft 131 on the motor 130 side is supported by a sliding bearing 135. A stepping motor 130 for driving a recording/reproducing head assembly 200, which will be described later, is attached with the tip of a screw shaft 131 being supported on the pivot bearing 100d. As shown in FIG. 9, the screw shaft 131 of the stepping part has a spiral screw groove 1.
31a is formed, and a needle bin 202 protruding from the head assembly 200 is engaged with this screw groove 131a as described later. Further, a washer 132 is attached to a portion of the screw shaft 131 in the vicinity of the sliding bearing 135 to prevent lubricating grease or foreign matter from entering the same bearing 135 from other portions of the screw shaft 131. There is.

As shown in FIGS. 10 and 11, the head assembly 200 has a base xoocl& attached to a part of the head carriage on a guide bar 133 installed between the base 100b and a support plate 100e cut up from the base. The base 10 can be moved back and forth via a sliding bearing 134.
0.

The head assembly 200 is provided with a head carriage 201a having a helad arm 201, the sliding bearing 134 is attached to one side of the head carriage 201a, and a needle bin 202 is provided to the other side,
This needle bin 202 is connected to the stepping motor 13.
The screw ii of 0 is engaged with the screw groove 1318 of 31. With this structure, the stepping motor 13
The screw shaft 131 rotates due to the drive of 0, and the screw groove! The needle bottle 202 is pressed through 31a,
The head assembly 200 is moved back and forth eight times. A magnetic head for surface 0 is fixed on the lower side of the head carriage 201a, and a magnetic head for surface 1 is supported on the upper side via the helad arm 201. A head arm 201 having a single-sided head can approach and move away from the disk, and via a damper mechanism or solenoid mechanism described below, the single-sided head softly lands on the disk to record or reproduce information on the disk. I do.

First, FIGS. 12, 13 (A), (B), and (C) and FIGS. 14 (A) and (B) illustrate the damper mechanism 170.

The damper mechanism 170 includes a damper 171 and a damper arm 172, and the damper is attached to the base 100 via a plate 173. For mounting the damper, the plate 173 is bent into a hook shape and screwed to the lower surface of the base 100. For mounting the damper, a support shaft 174 is provided extending parallel to the base wall from the rear wall side of the base of the plate 173, and a damper arm 172 is attached to this support shaft 174.
is supported by the rotary liJ function. Support shaft 1? 4
A 3-ir spring 175 is wound, and a coil spring 175 is wound.
One end of t'175 is 0, Gunbar is attached to the board! 73 is supported on the side wall side of the base 1, and the other end is the damper arm 1
72 f ~ Supported on the bar arm 172, the rotation of the bottom surface of the plate 100 at a constant pace of 100,! The bending part 1f 2a protruding from the damper part 1f 2, which imparts the behavior, fits into the notch formed in the rotary piece 171a of the damper 1f 1. Damper arm 172 and damper 171 are interlocked. In addition, the damper arm 172 has a first and second pivot]・176.17
7 is provided, the first pivot 1st floor is attached downward to the tip of the arm 176a that protrudes from the center of the damper arm toward the disk, and the
The pivot 177 is oriented 1l=J from the damper arm 172 in the direction of entry. The first pivot 17B transmits the upward movement of the cassette guide 152 to the damper arm 172, and the second pivot 177 comes into contact with the bottom surface of the base 100 and acts as a stopper below the damper arm. And both of them [
・The positional relationship between the 1st floor and 177 is that when the cassette is inserted into the disk device and the 12th floor is in the 12th state, the first pivot 1
76 contacts the top surface of the cassette guide 152, and when the cassette is inserted and mounted, the second pivot 1 foot 7 contacts the bottom surface of the base 100. The damper arm 1 is set so that it floats up from the top surface by a gap G. This gap G is provided to ensure that the damper arm 1 and 2 are not subjected to external force when the cassette is inserted and the head is in contact with the disk. It is provided separately from the head arm 201 so as not to obstruct the movement of the head arm.

Furthermore, FIGS. 15 and 16 (A), (B), and (C) show solenoid assemblies, which are used as a bar with the above-mentioned damper assembly. The selection of whether to use a damper mechanism or a solenoid mechanism is determined by the system of the host equipment to which the FDD is installed. Note that when the damper mechanism is used for boat fishing, the head is loaded onto the disk with the cassette attached, and the disk is rotated only during read/write operations. Furthermore, when a solenoid mechanism is used, the disk is constantly rotated when the power is turned on, and the head is loaded onto the disk by excitation of the lenoids only during read/write operations.

The solenoid machine gtso includes a solenoid 181, a plunger 182 that is attracted by the excitation of the solenoid,
It consists of a head load arm 183 and the like, and the solenoid is screwed to the base 100 via a plate 184. For mounting the solenoid, there is a U-shaped support part 1 on the plate 184.
84a is provided to protrude, and this support portion 184
A support shaft 184b is supported on the support shaft 184b. A helad load arm 183 is rotatably supported on the support shaft 184b, and a coil spring 184c is wound around the support shaft 184b. coil spring 1
One end of 84C is locked to a U-shaped support portion 184a, and the other end is locked to the head load arm 183, thereby giving the head load arm 183 a clockwise rotational habit in the figure. ing.

The side of the plunger 182 opposite to the main body of the solenoid 181 protrudes toward the head assembly through a through hole (not shown) formed in the plate 184; By installing E-ring 189,
The amount of protrusion of the plunger 182 from the main body of the solenoid 181 is regulated. Furthermore, a plunger return spring 185 is mounted between the E-ring 189 and the solenoid, and applies an urging force to the plunger in the direction of the head assembly. In addition, when mounting the solenoid on the E-ring of the plunger 182, a noise damping rubber 186 is attached to the plate 184 side and inside the outer end of the plunger, respectively, to reduce the noise caused by the impact caused by the movement of the plunger. It is considered.

A first pivot 187a is provided at the tip of the head load arm 183, and when the disc cassette 1- is not inserted into the FDD, this pivot 18'7a is connected to the surface of the cassette guide 152. When the head 1'' door arm 183 comes into contact with the head 1, it is pushed up to the position shown in FIG. 16 (Δ) against the bias of the coil spring 184c. At this time, the RAD load arm 183 moves the RAD arm 2 to one side of the head carriage.
The lifter 204 of 01 is supported, and the rad arm 20 is
1 is supported in the non-use position shown.

Further, a second pivot 187b is provided at a portion of the head load arm 183 that comes into contact with the plunger 182. , when a disk cassette is inserted into the FDD,
The cassette guide is lowered by the aforementioned cassette mounting mechanism, and the first pivot 187a is released from the upper surface of the cassette guide, so that the head load arm 183
is rotated clockwise in the figure by the biasing force of the coil spring 184C, and the head load arm 183 is moved as shown in FIG. is held in position. When the second pivot 187b comes into contact with the plunger, the first pivot 187a) is in a position where it does not come into contact with the ceramic guide. At this position, the head arm 201 is supported by the head load arm 183, and the head 205 is supported at a standby position at a predetermined pressure wi from the disk IO.

From this state, when the solenoid 181 is energized and the plunger 182 is attracted in the direction of the arrow in FIG. 16(C),
The head load arm 183 further rotates clockwise in the figure due to the biasing force of the coil spring 184c, and as shown in FIG.
It occupies the position shown in C). In this position, the Herad load arm 183 is separated from the Herad arm 201, and the one-sided head 205 provided on the head arm 201 comes into contact with the disk 10.

Next, the circuit board will be explained. As shown in FIG. 2, a PCB 400, which is the main control circuit board, is mounted on the cassette guide 152, covering the various components mentioned above. Furthermore, as already explained at the beginning using FIGS. 3 and 4, the top surface of the base 100 has a PC for the DD motor.
B300 is placed. In other words, in conventional FDDs, the main PCB, which was often placed on the bottom surface of the base alongside the DD motor PCB, is placed on the base 100 with various components sandwiched between them. It is placed directly facing the PCB 300.

As shown in FIG. 2, one side wall 100a of the base 100
There is a support notch 100 that supports the main PCB 400.
a' is formed in two places, and the same <PCB4 is formed on the other side wall.
A support part 100a is formed with one notch fooa' that supports 0O, and further has a support part 100a for screwing the PCB 400.
'' is formed by, for example, being cut and raised.
Engagement protrusions 400a are formed at positions corresponding to the notches 100a' in the base side wall of B400. A through hole for screwing, for example, is formed at a position corresponding to the support portion 100a. With this configuration, when the PCB 400 is assembled into an FDD, the engagement protrusion 400a of the PCB 400 is fitted into the notch f00a' of the base side wall, and the PCB 400 is connected to the support part 100a'' of the base side wall through the through hole. Then screw it in place with the screw 405. Only one place needs to be screwed in place.

Then, as shown in FIGS. 1A and 1B, a shield cover 500 for noise shielding is attached to cover the entire structure. This shield cover has a rectangular plate shape, and the projecting sides 502 formed on both sides are connected to the side walls 100 of the base ioo.
a, and the side wall 1 is connected to the hole 502a of the protruding side 502.
The front panel 120 is attached to the base 100 by engaging the convex portion 1 oop formed on the front panel 00a and engaging the retaining portion (not shown) with the front panel 120. At that time, a notch i100a is formed in the shield cover 500.
A claw-shaped PCB holding part 501 formed at a position corresponding to
Each of the protrusions 400a of the PCB 400 is pressed down. In this way, the main control board PCB400
is engaged within the side wall of the base 100, and the shield cover 5
00 holds the PCB 400 on the base. Furthermore, by attaching the shield cover and the base in this manner, the shield cover can function as a reinforcing member that prevents distortion of the base.

Furthermore, as already explained, in this embodiment, DD
PCB300 for the motor and PCB that is the main control circuit board
400 is placed directly opposite the base Woo on the same side. Further, at least one pair of a light emitting element and a light receiving element constituting a transmission type optical sensor is arranged on both circuit boards so as to directly face each other. That is, as shown in FIG. 3(B), for example, the circuit board 300 for the DD motor includes a light emitting element or light receiving element 401 constituting a sensor for detecting a cassette, and a light emitting element or light receiving element constituting a sensor for detecting write protection. Element 402
is provided. As shown in FIG. 2(A), the main control circuit board 400 has a light-receiving or light-emitting element 401' for the cassette detection sensor at a position directly facing the cassette detection sensor element 401 and the write protection sensor element 402. A light receiving or light emitting element 402' of a sensor for detecting write protection is attached.

Furthermore, as shown in FIG. 3@2, FIG. 3, and FIG. 17, a connector section 140 is attached to the end of the FDD device opposite to the front panel 120. The connector section 140 is for an interface with a host device and is connected to the main control circuit.■10 It consists of a connector 141 and a power connector 142 for power supply.In this embodiment, both connectors 141 and 142 are connected to the main control circuit. It is separated from the board 400 and is distributed in two layers stacked in the thickness direction of the FDD, in this case I10 attached to the PCB 141a.
Although the connector 141 is arranged on the lower stage and the power connector 142 attached to the PCB 142a is arranged on the upper stage, the vertical arrangement may be reversed.
and 142a are connected via a flexible printed circuit board (cable) 143a, and the PCB 142a
and the main control circuit board 400 are similarly connected by a flexible printed circuit board 143b. In addition,
The I10 connector 141 has a large number of ground terminals, but since these ground terminals are connected together into one common lead wire pattern and pulled out, the number of cables on the flexible printed circuit board 143b is reduced. , space saving is also achieved here.

When a disk device (FDD) with the above configuration is attached to an electronic device such as a computer or a word processor, the bottom mounting holes formed at three locations on the back of the base of the FDD are attached as shown in Figure 1 (C). For example, it is screwed to an electronic device via 101. By fixing at only 3 of the 4 locations that form the rectangle and using the remaining 1 location as a cutout, the FDD can be attached to electronic equipment using 3 locations.
Fixed with point support. Even if there is a dimensional error in the FDD fixing part on the electronic equipment side and the height difference is large, the base 100
No stress is applied to the base 100 that would distort the base! o.

distortion can be prevented.

Next, the operation of the FDD of this embodiment configured as above will be explained.

Turn on the power of the electronic device having the FDD installed as described above, and then insert the disk cassette 1 through the cassette insertion/ejection port 121 of the front panel 120 of the FDD.
50 into the cassette guide 152 of the FDD.

At this time, the cassette 150 is braked via the shutter 122 biased by the coil spring 125 and the brake spring 123, but this does not pose a problem since the manual pushing force is strong when inserting the cassette 150.

When the cassette 150 is inserted into the FDD, the sensor elements 401 and 401' for detecting the cassette disposed on the drive control board 300 of the thousand-star and the main signal control board 400 and/or the write protect sensor element of the cassette 150 402 and 402' are activated to input a signal to the host device indicating the insertion of the cassette 150 and/or whether write protection is set for the cassette.

When the cassette 150 is inserted in the direction A in FIG. 7, the notch 150a provided on the front edge of the cassette 150 comes into contact with the cassette shutter opening and pushing arm l5od of the arm portion 160C of the ejector 160, and the cassette The shutter opening and pushing arm 160d is pushed upward in the figure against the bias of the ejector spring 164 and rotated counterclockwise. At this time, the cassette shutter opens and the push-out arm 160d pushes the cassette shutter 150b to the left in the figure, so that the cassette shutter is opened at the same time as the cassette is inserted.
The disc will be exposed. In addition, the cassette 150 is shown in FIG.
When the position shown in B) is reached, and the cassette shutter opening and pushing arm 160d of the ejector 160 reaches a position parallel to the front end of the cassette, the arc-shaped base 160b of the ejector 160 is pulled out from the latch portion 162c of the slide plate 162. put out. Then, the slide plate 16
2 is disengaged from the ejector 160, and the slide plate 162 slides in the direction B in the figure by the tension of the tension coil spring 162b.

The cassette guide 152 that accommodates the cassette 150 has dowels 152a formed in a protruding manner on both sides of the guide groove 1 of the guide plate 162d on both sides of the slide plate 162.
62e, the slide plate 162
When the cassette guide is pulled in the direction B in the figure, the rollers 152b provided at the center on both sides of the cassette guide are attached to both sides 100a of the base 100.

Since the cassette guide 152 is engaged with the guide groove 100C formed in the guide groove 100a, the cassette guide 152 is shown as A in the figure.

Slide plate 1 cannot be moved in direction B.
The guide groove 162e of the 62 guide plate 162d is shown in FIG. 8(A).
, (B), and as already explained, it is formed as a long groove inclined downward, so when the slide plate 162 is pulled by the elasticity of the tension coil spring 162b, it is guided by this guide groove 162e and is forced to is moved downward and fixed to the cassette mounting position. .

First, a case will be described in which the FDD is provided with a damper mechanism as a buffer mechanism for the head assembly.

As already explained, the damper 171 is provided with the damper arm 172.
is given the habit of constantly rotating downward by a coil spring 175 wound around the support shaft 174, but the first pot 1 provided downward at the tip of the damper arm 172
76 is supported on the upper surface of the cassette guide 152, thereby restricting the limit of downward movement when the cassette is not loaded. The slide plate 162 moves as the cassette is loaded, and the cassette guide 15 moves accordingly.
2 moves toward the base 100, the cassette guide 1
The damper arm 1f 2 supported on the upper surface of the damper arm 52 is moved downward by the bias of the coil spring 175. However, the damper is filled with oil, and the damper arm 172 slowly descends due to the oil resistance. Then, the lifter 204 is attached to the damper arm 172.
The head arm 201 of the head assembly 200, which was supported by the damper arm 172, slowly descends, the single-sided head 205 makes a soft landing onto the disk 10, and the zero-sided head 206 and the first-sided head 205
The disk 10 is held between the two.

In this state, the disk 10 is rotated during read/write.

As already mentioned, the damper is provided with a second pivot 177, and when the damper arm 172 descends, the second pivot 177 comes into contact with the upper surface of the base 100, causing the damper arm 172 to move downward. Movement will be regulated.

In this state, as shown in FIG. 13(B), the head arm 2
A predetermined gap is formed between the lifter 204 of 01 and the damper arm 172.

Next, a case will be described in which a solenoid mechanism is provided as a buffer mechanism for the head assembly.

By inserting the cassette 150, the slide plate 162
When the latch portion 162C disengages from the ejector 160, the slide plate IB2 tensions the coil spring 1.
It is pulled toward the front panel by the elasticity of 62b. Accordingly, the guide plate 16 of the slide brake)-162
The cassette guide 152 guided to 2d via the dowel 152a moves downward. Due to the stiffness, the downward movement of the solenoid +: t was restricted by the cassette guide 152 resting on the upper surface of the cassette guide 152 (187a). FIG. 16(A) Turns clockwise. Then, the second pivot 187b of the solenoid 181 comes into contact with the outer end of the plunger! This restricts the rotation of the head load arm 183, and the head load arm 183 is held at the standby position shown in FIG. 16(B). At this position "first pivot t-1"
87a occupies a position a predetermined distance from the upper surface of the cassette guide 152, and the head arm 2,0 with the lifter 204 supported by the head load arm 183.
The one-sided head 205 of No. 1 is on standby at a predetermined distance [i] from the disk 10. When using a solenoid, the disk is usually rotated immediately after the N source of the host device to which the FDD is installed is turned on.

Next, the solenoid 181 is energized, and as shown in FIG.
As shown in C), the plunger returns against the bias of the plunger return spring 185. 182 is the movable coil spring 184
The head load arm 183 further rotates clockwise due to the biasing force c. Then, head load arm 18
The head arm 201, which was supported by A1 3, escapes from the restriction of the Herad load arm 1B3 and descends due to the bias of the coil spring 203a acting on the head arm 201, and the one-plane head 205 It comes into contact with the disk 10. In this state, desired reading and writing of information is performed.

When the power supply to the salt maid 181 is cut off, the plunger 182 is returned to the standby position shown in FIG.
is separated from the disk 10. .

The head assembly 200 has already been explained! , also bearing on the base 100, 1 and the guide bar 13
3, the needle bin 202, which is slidably guided via a sliding bearing 134 attached to a part of the head carriage 201a and is provided in the head assembly, is able to step! By engaging with the screw groove 131a of the screw shaft 131 of 30, the stepping motor! It is moved by the drive of 30.

Due to the movement of the head assembly 200,
The position control of 5.208 is performed in a known manner and will not be described here.

After the information cannot be read or written to the disk as described above, when ejecting the disk, when the eject button 161 provided on the front of the FDD is pressed, the slide plate 162 pulls against the bias of the coil spring 162b. Slide in the entry direction from the position shown in FIG. 7(B). eject button 161 of slide brake)-162
A latch portion 162C formed at the opposite end is extended from the rear of the arc-shaped base portion 160b of the ejector 160, and the arm portion 160e of the ejector 160 is rotated counterclockwise by the bias of the ejector spring 164. and moves to the ejection position shown in FIG. 7(A). At this time, the cassette 150 is pushed out and rotated counterclockwise of the shutter release arm 160d, which is provided at the tip of the arm portion 160c of the ejector 160 and keeps the shutter 15ob of the cassette 150 in the open position, so that the cassette 150 is moved toward the front door 120. being pushed out. At this time, as the arm portion 160c of the ejector 160 pushes out the cassette and the shutter release game 160d rotates, the same aperture gradually opens.
5. The cassette 150 that escapes the restriction of the system 160d.・
The ivy 1.50b is moved in the closing direction by a spring mechanism (not shown), so the cassette 150 is ejected from the FDD with the shutter 150b closed6. On the inside of the front panel 120 of BU1! - Ki spring 123 and coil spring 125 (ζ
The movement of the cassette 150 is reliably braked with a strong braking force through the energized shutter 122, which prevents the cassette from popping out and falling off, causing damage. 122, the coil batt, +125 L has no effect, and no large load is applied to the cassette 150.

[Effects of the Invention] As is clear from the above description, according to the present invention, A.
In a disk device having an opening for discharging and provided with a shutter that is rotatable to open and close the opening Y part, the shaft 9 has an opening part 'iLI at all times.
4-b in W: heavy member,
A second structural member is provided which acts in the direction of closing the opening only during the insertion operation and ejection operation of the case 71, and the first and second elastic members act to close the opening. (1) A structure is adopted in which the movement of the cassette is braked through the shutter when inserting and ejecting the cassette. The two parts work together to reliably brake the cassette with strong force.
cassette) - Only the first elastic member acts when it is attached,
The person N-y (puts a load on the cassette. It is rattling.

The disc is ejected by sledging like this, 5', 4, 4, A ejection mechanism. The structure of the disk drive is simple and smooth, and the spacer 1) allows the disk device to be smaller, thinner, and lighter.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 and the following diagrams explain the structure of F Ory according to an embodiment of the present invention, and FIGS. 1(A) and 1(B). (C) and (D) are a plan view, side view, bottom view, and front view showing the overall appearance of Fr1D, respectively, and Figure 2 (to 7) is with the shield cover of the FDD shown in Figure 1 removed. A plan view of the state, Figure 2 (B) is a front view of the same state, Figure 3 (
A) is a plan view with the FDD shield cover and main control circuit board removed, FIG. 3(B) is a plan view showing the DD motor installed, FIG. 3(C) is a side view, figure(
D) is a front view, FIG. 4(A) is a side sectional view showing the assembled state of the DD motor, FIG. 4(B) is a perspective view of main parts showing the arrangement of the coil and Hall element of the DD motor, and FIG. Diagram (C)
is a plan view of the DD motor, FIG. 4(D) is a cross-sectional view of the DD motor taken along line IV-IV in FIG. 4(C), and FIG. 5(A) is a plan view of the DD motor.
, (B) is an explanatory diagram showing the action of the brake spring and coil spring, and Fig. 6 is the slide plate/ejector assembly I.
FIG. 7(A) is a plan view showing the N-shaped state. (B), (C)
FIG. 8(A) is an explanatory diagram showing the operation of the ejector. (B) shows the operation of the cassette guide, 5-Explanatory diagram 1,
Figure 9 is an explanatory diagram showing the state of Stella Shi'7, Gumo, and Yu's group σmekomi 4. Figure 10 is an explanatory diagram showing the assembled state of the Rad assembly, and Figure 11 is 14
Pig 11E Damper Explaining the mechanism t)σ)′te, 1st
Figure 2 shows the state where the mechanism is installed.
An explanatory diagram showing FIG. 13(A). (B), (C) An explanatory diagram showing the state of the installation of the X-bar mechanism, Figures 14 (A) and (B) are explanatory diagrams showing the operation of the damper, and Figures 15 and 16 are). This is to explain the tunoid mechanism, and FIG. 15 is a block diagram of the \noL/7 noid mechanism, and FIGS. 16 (A) and (B). (C) is an explanatory diagram showing the operation of the solenoid, and Fig. 17 (A
)...=(C) is an explanatory diagram showing the arrangement of connectors. 100...Base 100a...Side 100a
...Notch 100a ...Support part i oob・
...Rear wall 101...Bottom mounting is part 102...
- Notch part 110...DD motor 111...Stator yoke 112...Coil 113...Hall element 11
4...Spindle shaft 115...Rotor yoke 115a...Magnet 120 Front panel 121...Cassette insertion/ejection port 122...Shutter 123...Brake spring 130...Stepping motor 131...Screw Shaft 132... washer 13
3... Guide bar 140... Connector part 141
...I10 connector 1 4 1 a -P CB 142-...Power connector 142 a = P C
B143a, 143b = flexible PCB300...
・Motor PCB 400...Main PCB 401...Sensor element for cassette detection 402...Sensor element for write protection detection 500...IjrTr2t for housing the shield cover Fig. 12

Claims (1)

[Claims] 1) In a disc device that has an opening for inserting and ejecting a cassette containing a disc as a recording medium, and is provided with a shutter that can be rotated to open and close the opening, the shutter is constantly a first elastic member that acts in a direction to close the opening; and a second elastic member that acts in a direction to close the opening only when the cassette is inserted and ejected; A disk device characterized in that an elastic member applies a brake to the movement of the cassette during insertion and ejection through the shutter.