JP2586553Y2 - Printed circuit board holding structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board holding structure provided in a drive device such as an FDD incorporated in a personal computer, a word processor or the like.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 4, a drive device 2 such as an FDD is provided in a device body such as a personal computer or a word processor, and a floppy disk 3 is inserted into the drive device 2. It can be detached.

That is, on the front surface of the drive device 2 provided in the main body of the apparatus, there are provided an insertion slot 2a for the floppy disk 3, an eject button, an access lamp for detecting a state in which the floppy disk 3 is inserted, and the like. ing. A shutter 4 having a predetermined window 4a is provided on the upper and lower front surfaces of the floppy disk 3.
Is mounted so as to be slidable in the horizontal direction, so that when the floppy disk 3 is inserted, the shutter 4 slides in the horizontal direction, and the head window of the disk case 5 opens in accordance with the window 4a of the shutter 4. Has become.

The drive device 2 has an insertion slot 2
Shutter 4 of floppy disk 3 inserted from a
A window opening / closing lever 6 that slides the disk table 7 in a horizontal direction, a disk table 7 that holds and rotates the hub of the inserted floppy disk 3, a drive motor 9 that rotates the disk table 7 at a predetermined speed by a belt 8, and A head carriage 11 having a magnetic head 10 for recording a predetermined signal on the upper and lower surfaces of the disk or reading the recorded signal is provided.

[0005] The head carriage 11 is inserted into a drive device by a traveling member 14 engaged with a screw shaft 13 rotated by a stepping motor 12 and a traveling guide member 16 slidably inserted into a guide shaft 15. The floppy disk 3 is slidable in the direction of arrow A along the head window. An I / O connector 18 for inputting and outputting various signals is provided on a printed circuit board 17 having a control circuit of the drive device 2. When the printed circuit board 17 is fixed to the bottom plate of the case 19, appropriate positions including the four corners of the printed circuit board 17 are fastened by screws 20 to prevent the printed circuit board 17 from rising due to warpage and to the I / O connector. 18
This prevents the I / O connector from being twisted in the vertical direction when attaching and detaching the lead wire connector.

[0006]

However, the conventional printed circuit board holding structure as described above requires many screws to fix the printed circuit board to the bottom plate of the case, which increases the number of assembling steps and Since the space for the screw stopper is small, there is a problem that the thickness of the screw cannot be reduced due to the influence of the arrangement of other components. Also, since the I / O connector is only fixed to the printed circuit board by soldering, etc.,
When the lead wire connector is attached / detached, the I / O connector is likely to be distorted or twisted, causing problems such as pattern peeling or damage to the I / O connector, and the inability to reliably attach / detach the lead wire connector.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the conventional structure. By pressing a peripheral edge of a printed circuit board and an I / O connector with a part of a case, a screw of the printed circuit board is formed. An object of the present invention is to provide a printed circuit board holding structure that reduces the number of stop portions to reduce the number of assembling steps, enables the drive device to be thinner, and prevents pattern peeling and I / O connector damage at the time of connector attachment / detachment.

[0008]

In order to achieve the above object, a printed circuit board holding structure according to the present invention has a notch window formed in a side wall surrounding the periphery of a case, and an upper edge of the notch window. The edge of the inserted printed board is formed by forming an L-shaped locking piece bent inside the case at the portion and making the height from the bottom plate of the case to the L-shaped locking piece correspond to the thickness of the printed board. The upper surface is configured to be held by an L-shaped locking piece. A cutout window is formed on a side wall surrounding the periphery of the case to expose an I / O connector fixed to a printed circuit board, and an L-shaped locking piece bent inward of the case is provided at an upper end edge of the cutout window. And the height from the bottom plate of the case to the L-shaped locking piece is
By making the O connector have a fixed thickness, the upper surface of the inserted I / O connector of the printed circuit board can be held.

[0009]

Based on such a configuration, in the printed circuit board holding structure according to the present invention, the side wall surrounding the periphery of the case is provided with:
A notch window is formed, and an L-shaped locking piece bent inside the case is formed at the upper edge of the notch window, and the height from the bottom plate of the case to the L-shaped locking piece is set to the printed circuit board. And the thickness of the I / O connector fixed to the printed circuit board, so that the edge of the inserted printed circuit board and the upper surface of the I / O connector fixed to the printed circuit board are L-shaped. With the configuration of holding by a piece, the number of screw fixing points for fixing the printed circuit board is reduced, floating is prevented by warpage of the printed circuit board, and pattern peeling and connector breakage when attaching and detaching the lead wire connector to the I / O connector Can be prevented.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view of a main part showing a holding structure of a printed circuit board according to the present invention, FIG. 2 is a sectional view taken along line 2-2 of FIG.
FIG. 3 is a sectional view taken along line 3-3 in FIG. In the figure, 30
Denotes a case of the drive device according to the present invention, 34 denotes a printed board having a control circuit, and 35 denotes an I / O connector fixed to an end of the printed board 34.

A rear side wall 31 surrounding the case 30
A notch window 32 having a predetermined height from the bottom surface of the case 30 is formed at both ends of the case 30. An L-shaped locking piece 32a bent inside the case 30 is formed at the upper edge of the notch window 32.
And the height from the bottom plate of the case 30 to the L-shaped locking piece 32 a is set to correspond to the thickness of the printed circuit board 34. Therefore, the L-shaped locking piece 32a abuts on the upper surface of the printed circuit board to prevent the printed circuit board from rising due to warpage.

A central portion of a rear side wall 31 surrounding the periphery of the case 30 has an I
In order to expose the I / O connector 35 to the outside, a cutout window 33 having a predetermined height from the bottom surface of the case 30 is formed. The L-shaped locking pieces 33a are formed, and the case 3
The height from the bottom plate 0 to the L-shaped engaging piece 33a is set to correspond to the thickness of the I / O connector 35 fixed to the printed circuit board 34. Therefore, the I / O connector 3
The vertical distortion and torsion applied to the I / O connector when the lead wire connector is attached to and detached from the connector 5 are suppressed by the tip of the L-shaped locking piece 33a, and the I / O connector 35
4 can be prevented from peeling off.

Next, a case where the printed circuit board 34 is mounted on the case 30 of the drive device according to the embodiment of the present invention configured as described above will be described. First, an I / O connector 35 is fixed to the center of the rear end of the printed board 34 by soldering. Next, as shown in FIGS. 2 and 3, the I / O connector 35 side of the printed board 34 faces the rear side wall 31 side of the case 30, and both ends of the printed board 34 are L-shaped locking pieces in the direction of arrow B. 32a,
Insert the I / O connector 35 into the L-shaped locking piece 33a. After that, the printed circuit board 34 is assembled by screwing an appropriate position on the rear side of the printed circuit board 34. The printed circuit board 34 is positioned in the horizontal direction by the peripheral side wall of the case, and components such as the disk table 7 and the drive motor 9 mounted on the printed circuit board are fixed to the bottom of the case by screws or the like. So
All screws used only for assembling the printed circuit board may be omitted.

[0015]

As described in detail above, the printed circuit board holding structure according to the present invention has cutout windows formed on the side walls surrounding the periphery of the case, and the upper end edge of the cutout window has the case. An L-shaped locking piece bent inward is formed, and the height from the bottom plate of the case to the L-shaped locking piece corresponds to the thickness of the printed circuit board and the thickness of the I / O connector fixed to the printed circuit board, respectively. As a result, the edge of the inserted printed circuit board and the I /
Since the upper surface of the O-connector is held by the L-shaped locking piece, the number of screw fixing portions for fixing the printed circuit board to the bottom plate of the case can be reduced. Since the space does not affect the arrangement of other components, the thickness can be reduced. Further, even when the lead wire connector is attached to or detached from the I / O connector fixed to the printed circuit board, the I / O connector is not distorted or twisted. Easy connection and disconnection of lead wire connectors.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing a printed circuit board holding structure according to the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 1;

FIG. 4 is a plan view showing a holding structure of a printed circuit board in a conventional drive device.

FIG. 5 is a perspective view showing a main part of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 30 Case 31 Rear side wall 32, 33 Notch window 32a, 33a L-shaped locking piece 34 Printed circuit board 35 I / O connector

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) G11B 33/12 304 G11B 25/04 101 G11B 33/02 301

Claims (2)

(57) [Scope of request for utility model registration] 1. A printed circuit board holding structure for fixing a printed circuit board to a case of a drive device, wherein a notch window is formed in a side wall surrounding a periphery of the case, and an upper end edge of the notch window is formed inside the case. By forming a bent L-shaped locking piece and making the height from the bottom plate of the case to the L-shaped locking piece equal to the thickness of the printed circuit board, the upper surface of the edge of the inserted printed circuit board is L-shaped locked. A holding structure for a printed circuit board, wherein the holding structure is configured to be held by a piece. 2. A printed circuit board holding structure for fixing a printed circuit board to a case of a drive device, wherein a cutout window for exposing an I / O connector fixed to the printed circuit board is formed on a side wall surrounding the periphery of the case. An L-shaped locking piece bent inside the case is formed at the upper edge of the cutout window, and the height from the bottom plate of the case to the L-shaped locking piece is set to a thickness at which the I / O connector is fixed to the printed circuit board. Wherein the upper surface of the inserted I / O connector of the printed circuit board is held.