JP2001084751A - Disk-drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk-drive device that can stably provide a connection body for electrically connecting two substrates. SOLUTION: In the disk-drive device, a control circuit substrate 14 provided at the inner-surface side of a frame 9 and a motor-driving circuit board 13 provided at an outer-surface side are supported by the frame 9, a flexible connection body 15 is bent at least once and formed, and a bent part 15b is pressed down by a press part 9c, where a bottom surface 9e of the frame 9 is formed in one piece. The press part 9c is formed in the disk-fitting region of the frame 9. Also, the press part 9c is set to nearly a box shape with an opening 9d, that is the insertion port of the connection body 15. The device is made thin by the press part without allowing the bent part to bulk in the thickness direction, and the strength of the frame is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a disk drive, and more particularly, to a disk drive for electrically connecting a control circuit board and a motor drive circuit board.

[0002]

2. Description of the Related Art In recent years, with the rapid spread of computers and OA equipment, miniaturization of equipment has been promoted. As a recording medium of these devices, there is a floppy disk, a hard disk, or the like. When these discs are used as recording media, devices that rotate the discs and read / write
A device or the like for performing writing is required.

[0003] For example, the technology is disclosed in Japanese Patent Application Laid-Open No. 8-45242. The outline will be described below.

The prior art configuration of the above publication discloses a carriage body having an upper and lower head for recording and reproducing information on and from a disk, and a stepping motor for sliding the carriage body with respect to the disk. A housed frame, a control circuit board that performs signal processing for the upper and lower heads and drive control of the stepping motor, and a motor drive circuit board that rotationally controls a disk drive motor for rotating the disk. And the control circuit board and the motor drive circuit board are electrically connected by a flexible connecting body. A disk moving mechanism is mounted between the frame and the cover.

[0005] FIG. 4 shows a case where a control circuit board 14 and a motor drive circuit board 13 are connected to each other by a flexible connector 115 (for example, FPC).
Or FFC). The length of the connection body 115 is determined by a predetermined distance L between the substrates 13 and 14 in consideration of a positional deviation when the substrates 13 and 14 are attached.
It is made longer with a little more room. Therefore, the connecting body 115 is not stabilized at a fixed position, and the extra portion of the connecting body 15 becomes the bent portion 115a after the connection and becomes a thickness direction (FIG. 4).
In this case, it protrudes upward, which hinders thinning.

Therefore, FIG. 5 shows a state where the positional instability of the connecting member 115 is improved to be in a stable state. FIG. 5 is a cross-sectional view showing a state where the connection body 115 is bent once and connected to absorb a positional shift between the substrates. As shown in FIG. 5, the connecting body 115 is bent once to form a two-tiered structure, which can sufficiently absorb the positional deviation at the time of attachment between the substrates 14 and 13 and at the same time, can make the distance L between the substrates 14 and 13 possible. It can be as small as possible. As means for preventing the bent portion 115b from being displaced in the thickness direction, the connection body 115 is bonded and fixed to a part of the substrate 14 with an adhesive 116.

[0007]

However, in the structure of the prior art shown in FIG. 5, when it is necessary to replace the connecting body, the control circuit board is damaged when the connecting body is peeled off from the control circuit board. There is a problem that a bonding process is required in manufacturing and workability is poor.

[0008] In addition, it is conceivable that the location of the connecting member is arranged below the disk mounting area inside the device with the miniaturization of the device. In this case, the bent portion of the connection body may bend toward the disk due to peeling of the adhesive or the like, which may adversely affect the disk.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a disk drive device capable of stably disposing a connecting body for electrically connecting both substrates. .

[0010]

In order to achieve the above object, a disk drive according to the present invention comprises a frame accommodating a carriage body having a head for recording and reproducing information on and from a disk; A control circuit board that performs signal processing on the head, and a motor drive circuit board that rotationally controls a disk drive motor for rotating the disk, and the control circuit board and the motor drive circuit board; Is electrically connected by a flexible connector, the flexible connector is formed by bending the flexible connector at least once, and the bent portion is formed by a pressing portion integrally formed on the frame by press working. It is characterized in that it has a holding structure.

Further, the pressing portion is formed in a disk mounting area of the frame.

Further, the control circuit board and the motor drive circuit board are supported by the frame.

Further, the control circuit board and the motor drive circuit board are separately supported on different surfaces of the frame.

Further, the control circuit board is arranged on an inner surface side of the frame, and the motor drive circuit board is arranged on an outer surface side of the frame.

Further, the pressing portion is located above the motor drive circuit board and is formed so as to protrude toward the inner surface side of the frame.

Further, the pressing portion is characterized in that it has a substantially box-like shape having an opening which is an insertion opening of the flexible connecting member on one side.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A case where the present invention is applied to a floppy disk drive will be described below with reference to the drawings.
FIG. 1 is an exploded exploded perspective view of a floppy disk drive according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of the frame body of FIG. 1, and FIG. 3A is a first embodiment of the present invention. FIG. 3 (b) is a cross-sectional view of the two substrate connecting portions according to the second embodiment of the present invention.

In FIG. 1, a floppy disk drive 1
The overall large configuration of is composed of a frame body 2, a carrier 3, a slide plate 4, an upper cover 5, a front panel 6, and a shutter 7. The carrier 3 detachably holds the disk 8 and is housed in the frame body 2 while being engaged with the slide plate 4. The slide plate 4 and the carrier 3 are assembled while being locked by the lock lever 3a.

A coil spring (not shown) is mounted between the slide plate 4 and the carrier 3, so that the slide plate 4 is always urged toward the front panel 6. The slide plate 4 is configured to be slidable in the horizontal direction.
The carrier 3 is moved up and down for positioning at the discharge position.

As shown in FIG. 1, the front panel 6
Has a disk insertion slot 6a for inserting and discharging the disk 8, and is attached to the front side of the frame body 2. On the back side of the front panel 6, a shutter 7 for opening and closing the disk insertion slot 6a is attached to both side walls 9a of the frame 9. Upper cover 5
Is fixed to the frame 9 by screws (not shown) after the carrier 3 and the slide plate 4 are attached to the frame 9.

As shown in FIG. 2, the frame 2 is
It is constituted by a sheet metal frame 9 having opposing side walls 9a, and components supported by the frame 9. The frame 9 includes a carriage 10 on which upper and lower heads 10a and 10b are mounted for recording and reproducing information on and from the disk 8, and a stepping mechanism for sliding the carriage 10 with respect to the disk 8. Motor 1
1, a motor drive circuit board 13 for controlling a disk drive motor 12 for driving the disk 8, and a control circuit board for performing signal control for the upper and lower heads 10a and 10b and drive control for the stepping motor 11. 14
And are supported and fixed.

The control circuit board 14 is mounted on the bottom 9 of the frame 9.
e is fixed to the inner surface side by a screw. The motor drive circuit board 13 is fixed to the outer surface of the bottom surface 9e of the frame 9 by screws. The control circuit board 14 and the motor drive circuit board 13 are electrically connected by a flexible connector 15 described later.

The operation of the floppy disk drive 1 having the above-described configuration will be described. First, the disk 8 is inserted into the carrier 3 from the disk insertion opening 6a of the front panel 6. At this time, the locked state between the slide plate 4 and the carrier 3 is released, and the slide plate 4 slides toward the front panel 6 by the bias of the coil spring.

With this operation, the carrier 3 moves downward (to the side of the frame 9) by the cam mechanism formed by the cam surface formed on the slide plate 4 and the cam follower formed on the carrier 3 in conjunction with the horizontal slide of the slide plate 4. ) To guide the disk 8 to the recording / reproducing position. In this state, the disk 8 is moved by a lever (not shown).
a is released and positioned and supported in the frame 9. At this time, the upper and lower heads 10 of the carriage body 10
a, 10b, a recording medium 8 stored in a disk 8
b so as to be in contact with each other.

Here, when a signal for performing recording, reproduction, and erasure is input from a personal computer or the like on the system side, the disk drive motor 12 rotates the recording medium 8b, and the carriage body 10 moves up and down the head 10a. , 10b are sought to a predetermined track to perform recording, reproduction, erasure, and the like. When ejecting the disc 8, the eject button 4a is pressed to move the slide plate 4 horizontally away from the front panel 6. At this time, the carrier 3 moves upward (toward the upper cover 5) by the cam mechanism between the slide plate 4 and the carrier 3, and the disk 8 moves to the insertion / ejection position. In this state, the disk 8 is ejected.

FIG. 2 is an enlarged perspective view of the frame 2 shown in FIG. When the disk 8 is mounted at the recording / reproducing position, a hole (not shown) formed in the disk 8 engages with a pair of disk support projections 9b formed on the inner surface side of the bottom surface 9e of the frame 9. , The disc 8 is positioned reliably. As described above, the control circuit board 14 and the motor drive circuit board 13 are
5 electrically connected by the flexible connector 1
The connection position 5 is just located in the disk mounting area A, as shown by the two-dot chain line in the figure.

Since the flexible connector 15 is bent and connected as described later, a pressing portion 9c for pressing the bent portion is integrally formed on the inner side of the bottom surface 9e of the frame 9 by press working. ing. Holding part 9
FIG. 3C shows a state in which a protrusion is formed on the inner surface side of the frame 9 above the motor drive circuit board 13 (FIG. 3). The holding portion 9c is formed in a substantially box-like shape having an opening 9d (FIG. 3), which is an insertion opening of the flexible connector 15 on one side.

Therefore, as shown in FIG.
Are located within the disc mounting area A indicated by the two-dot chain line in the figure, so that the space between the disc 8 and the frame bottom face 9e is effectively used, and the flexible connector 15 Contact problems can be avoided. Further, since the pressing portion 9c is formed integrally with the frame bottom surface 9e by pressing the frame bottom surface 9e, the number of components can be reduced and the strength of the frame can be increased.

Here, a first embodiment of the present invention will be described with reference to FIG. As shown in the drawing, the flexible connecting member 15 is bent once to electrically connect the control circuit board 14 and the motor driving circuit board 13, and the bent portion 15 b is formed on the bottom surface 9 e of the frame 9. The flexible connector 15 prevents the bent portion 15b of the flexible connector 15 from being displaced upward by inserting and pressing the opening 9d of the flexible connector 15 through the opening 9d. Can be absorbed. Further, by bending the flexible connector 15, the distance L1 between the substrates 14 and 13 can be made shorter, and the device can be downsized.

Next, the second embodiment of the present invention will be described with reference to FIG.
An embodiment will be described. As shown in the figure, the flexible connector 15 is bent an even number of times, for example, twice, so that the joint surface between the flexible connector 15 and the control circuit board 14 and the motor drive circuit board 13 becomes the same plane. Make an electrical connection. When the control circuit board 14 and the motor drive circuit board 13 are attached to the frame 9 by bending the flexible connector 15 even number times, a board in which both the boards 14 and 13 are connected in advance by the flexible connector 15 is incorporated. At the same time, the substrates 14 and 13 can be simultaneously assembled by being bent in a predetermined manner, so that the assembly is facilitated.

The flexible connector 15 and the control circuit board 1
4 and the motor drive circuit board 13 are joined on the same plane, and a single-sided board can be used for the flexible connector 15, so that the cost can be reduced. As shown in the figure, the upper bent portion 15b (the motor drive circuit board 13 side) bent twice is
The holding portion 9b holds the lower bent portion 15c (on the control circuit board 14 side) in contact with the end of the control circuit board 14 so as not to protrude to the lower surface side of the board.
Therefore, the lower bent portion 15c does not bend toward the lower surface of the control circuit board 14.

As in the first embodiment described above, the bending portion 15b is prevented from being displaced upward by the pressing portion 9c, and at the same time, the positional displacement when the substrates 14 and 13 are attached is reduced by the flexible connecting member 15. Can be absorbed.
The distance L1 between the substrates 14 and 13 can be made short, and the device can be downsized.

As shown in FIGS. 3A and 3B, the control circuit board 14 is arranged on the inner side of the frame bottom face 9e, and the motor drive circuit board 13 is arranged on the outer side of the frame bottom face 9e. ing. Therefore, by forming the holding portion 9 c above the motor drive circuit board 13, the bending portion 15 of the flexible connector 15 is formed by the holding portion 9 c of the frame 9.
b can be easily pressed down.

[0034]

As described above, in the disk drive device according to the present invention, since the bending portion of the flexible connector is pressed by the pressing portion, the whole device can be made thin without the bending portion being bulky in the thickness direction. it can. Also,
There is no need to prepare a new component for the holding portion, and the number of components can be reduced. Furthermore, since the frame is pressed, the strength of the frame can be increased.

Further, since the pressing portion is formed in the disk mounting area of the frame, the space between the disk and the frame can be effectively used, and the entire apparatus can be made thinner. Further, a highly reliable disk drive can be provided without the flexible connector coming into contact with the disk.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a floppy disk drive developed.

FIG. 2 is an enlarged perspective view of the frame body of FIG.

FIG. 3A is a cross-sectional view of a connecting portion of both substrates according to the first embodiment of the present invention, and FIG. 3B is a connecting portion of both substrates according to the second embodiment of the present invention. FIG.

FIG. 4 is a cross-sectional view of a state in which both substrates of the related art are linearly connected by a connection body.

FIG. 5 is a cross-sectional view showing a state in which a conventional connection body is bent to connect both substrates.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floppy disk device 2 Frame body 3 Carrier 4 Slide plate 4a Eject button 5 Upper cover 6 Front panel 6a Disk insertion slot 7 Shutter 8 Disk 8a Disk shutter 8b Recording medium 9 Frame 9a Side wall 9b Disk support protrusion 9c Pressing portion 9d Opening 9e Bottom surface 10 Carriage body 10a Upper head 10b Lower head 11 Stepping motor 12 Disk drive motor 13 Motor drive circuit board 14 Control circuit board 15, 115 Flexible connector 15b, 15c, 115b Folded part 115a Flexible part 116 Adhesive A Disk mounting area

Claims (7)

[Claims] 1. A frame accommodating a carriage on which a head for recording and reproducing information on and from a disk is accommodated, a control circuit board for performing signal processing for the head, and a drive for rotating the disk. A motor drive circuit board for controlling the rotation of a disk drive motor for performing the drive, wherein the control circuit board and the motor drive circuit board are electrically connected by a flexible connector. A disk drive device comprising: a flexible connector formed by bending at least one turn; and a bent portion pressed by a pressing portion integrally formed on the frame by press working. 2. The disk drive according to claim 1, wherein the pressing portion is formed in a disk mounting area of the frame. 3. The disk drive device according to claim 1, wherein the control circuit board and the motor drive circuit board are supported by the frame. 4. The disk drive according to claim 3, wherein the control circuit board and the motor drive circuit board are separately supported on different surfaces of the frame. 5. The disk according to claim 4, wherein the control circuit board is arranged on an inner surface side of the frame, and the motor drive circuit board is arranged on an outer surface side of the frame. Drive. 6. The disk drive device according to claim 5, wherein the pressing portion is located above the motor drive circuit board and is formed so as to protrude toward an inner surface of the frame. 7. The holding part according to claim 1, wherein the holding part has a substantially box-like shape having an opening on one side serving as an insertion opening of the flexible connection body. Disk drive.