JP4457978B2 - Holding structure for printed circuit boards of electronic equipment - Google Patents

Description

  The present invention relates to a structure for holding a printed board of an electronic device.

  FIG. 5 is a longitudinal front view of an electronic device having a conventional printed board pressing structure, and 1 is a full-size or half-size printed board (ISA board or PCI board) mounted on a personal computer (PC / AT compatible machine). 2 is a frame of the electronic device. The upper part of the printed board 1 on the panel 1 a side is fixed to the frame 2 side by a single fixing screw 3, and the bottom of the printed board 1 is connected and fixed to the connector 4 a of the back plane 4 fixed to the bottom of the case 2. When the printed board 1 is full-sized, the side opposite to the panel 1a is supported by the rail 5 provided in the vertical direction in the frame body 2 so as to be movable up and down and is prevented from shaking.

  Reference numeral 6 denotes a fixing bracket fixed to the frame body 2. A bracket 7 is attached to the lower portion of the fixing bracket 6 with a fixing screw 8, and a rubber cushion 9 is provided between the bracket 7 and the upper end of the printed board 1. The upward movement of the printed board 1 is pressed by the metal fittings 6 and 7 through the rubber cushion 9. The height of the printed board 1 varies depending on the manufacturer. In this case, the printed board 1 can be pressed by loosening the fixing screw 8 and moving the metal fitting 7 up and down.

Prior art document information relating to the invention of this application includes the following.
JP-A-6-232574 JP-A-10-125414 JP 2002-319799 A JP 2003-223964 A JP 2004-356839 A

  However, recent electronic devices have been reduced in size, and a space for providing the metal fittings 6 and 7 for holding the upper end of the printed board 1 has been reduced, so that a conventional holding structure cannot be obtained. Further, since the fixing screw 8 is provided in the front-rear direction and is parallel to the upper end of the printed board 1, it is difficult to fix the fixing screw 8 with a screwdriver, and the fixing operation cannot be performed without using a small screwdriver. Furthermore, the vertical movement of the metal fitting 7 is performed by loosening the fixing screw 8, but the range of the vertical movement is small and the height adjustment range of the printed board 1 is also small.

  The present invention has been made to solve the above-described problems, and is capable of realizing a pressing structure of a printed board even in a small electronic device and fixing screws for fixing the pressing board that holds the printed board. It is an object of the present invention to obtain a structure for holding a printed board of an electronic device that can be easily fixed by a screwdriver and has a large printed board height adjustment range.

  According to a first aspect of the present invention, there is provided a holding structure for a printed circuit board of an electronic device, which is attached to the rear portion of the frame of the electronic device and is formed to be inclined obliquely downward. The adjustment plate having a female screw part and a protruding part and a fixing screw inserted through the base side are screwed into the female screw part of the adjustment nut. As a result, the protruding portion of the adjustment nut is fitted in the groove provided in the lower part on the base side, and the concave part provided in the lower part on the tip side is disposed in the frame body. And a pressing plate engaged with an upper portion of the printed board.

  As described above, according to the first aspect of the present invention, the holding structure for the printed board is provided using the space at the rear of the printed board instead of the upper part of the printed board. It becomes easy to install the holding structure. In addition, since the engagement hole of the attachment plate is provided in the inclined portion of the attachment plate, the attachment of the holding plate to the engagement hole of the attachment plate can be used with the driver inclined when tightening the fixing screw. Mounting of the holding plate becomes easy. Furthermore, since the engagement hole of the attachment plate is provided in the inclined portion of the attachment plate, the movable range of the pressing plate is widened, and the height adjustment range of the printed board can be increased.

  The best mode for carrying out the present invention will be described below with reference to the drawings. 1 (a) and 1 (b) show a cross-sectional plan view and a front view of a main part of a small electronic device having a printed board pressing structure according to the best mode of the present invention. Reference numeral 11 also denotes a sheet metal top cover, and the main body frame 10 and the top cover 11 constitute a frame of a small electronic device. Reference numeral 12 denotes an attachment plate attached to the rear portion of the main body frame 10 in the frame body by an attachment screw 13, and FIGS. 2A to 2C show a front view, a side view, and a plan view of the attachment plate 12. As shown in the drawing, the mounting plate 12 is formed of a horizontal portion 12a attached to the main body frame 10 and an inclined portion 12b inclined obliquely downward from the horizontal portion 12a, and the horizontal portion 12a has an attachment hole 12c of the attachment screw 13. A plurality of engagement holes 12d are formed in the vertical direction from the horizontal portion 12a to the inclined portion 12b (mainly in the inclined portion 12b).

  FIGS. 3A to 3E are a front view, a left side view, a right side view, a bottom view and a front view of the adjustment nut 14 in a folded shape and closed, and one part of the folded shape. An insertion hole 14b is formed in 14a, a female screw portion 14d is formed in the other portion 14c, a protruding portion 14e protruding at a right angle is formed at the tip portion of one portion 14a, and the other portion A protruding portion 14f protruding at a right angle is also formed at the tip portion of 14c. The adjustment nut 14 is movably sandwiched in the engagement hole 12d of the mounting plate 12 in a closed folded state. That is, one portion 14a and the other portion 14c of the adjusting nut 14 are in contact with one side of the mounting plate 12 and the outside of the opposite side, and the connecting portion 14g is movably located in the engagement hole 12d, and the protruding portion 14f is movably fitted in the engagement hole 12d.

  4A to 4E show a partial cross-sectional front view, a left side view, a right side view, a plan view, and a bottom view of the presser plate 15 made of resin. The presser plate 15 is inserted into one end on the base side. A hole 15a is formed, and the fixing screw 16 inserted into the insertion hole 15a is inserted into the engagement hole 12d of the mounting plate 12 after being inserted into the insertion hole 14b of the adjustment nut 14, and the female thread portion 14d of the adjustment nut 14 is inserted by the driver 17 The base side of the pressing plate 15 is fixed to the engagement hole 12d of the mounting plate 12 by being screwed to the engagement hole 12d. Further, a groove 15b is provided in the lower part on the base side of the pressing plate 15, and the protruding portion 14e of the adjusting nut 14 is fitted into the groove 15b. Further, a concave portion 15c provided in the lower portion on the front end side of the pressing plate 15 engages with an upper portion of the half-size printed board (ISA board or PCI board) 18 provided in the frame body as described above. The reason why the protrusion 14e is fitted in the groove 15b is to prevent the pressing plate 15 from rotating when the pressing plate 15 is fixed to the engagement hole 12d of the mounting plate 12 by the fixing screw 16.

  In the above configuration, the height of the printed board 18 varies depending on the manufacturer. For this reason, when the upper part of the printed board 18 is pressed by the holding plate 15, the fixing screw 16 is loosened and the holding plate 15 is lowered to the height of the printed board 18 together with the adjusting nut 14, and the printing is performed in the recess 15 c at the tip of the holding plate 15. The upper part of the plate 18 is sandwiched and the fixing screw 16 is tightened.

  In the above-mentioned best embodiment, the pressing structure of the printed board 18 is provided not by using the upper part of the printed board 18 but by using the space at the rear of the printed board 18, so that the printed board 18 can be pressed even if the electronic device is downsized. The structure can be installed easily. In addition, the attachment of the holding plate 15 to the engagement hole 12d of the attachment plate 12 by the fixing screw 16 is easy because the driver 17 can be used obliquely. Furthermore, since the engagement hole 12d of the mounting plate 12 is provided in the inclined portion 12b, the movable range of the pressing plate 15 is widened, and the height adjustment range of the printed board 18 is large.

It is the principal part cross section top view and principal part longitudinal cross-sectional front view of the small electronic device which has the holding structure of the printed circuit board by this Embodiment best mode. It is the front view, side view, and top view of a mounting plate by the best embodiment. It is a front view, a left side view, a right side view bottom view, and a front view of the adjustment nut according to the best mode of embodiment. It is a partial cross section front view, left side view, right side view, plan view, and bottom view of the pressing plate according to the best mode for carrying out the invention. It is a vertical front view of the electronic device which has the holding structure of the conventional printed board.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Main body frame 11 ... Top cover 12 ... Mounting plate 12b ... Inclined part 12d ... Engagement hole 13 ... Mounting screw 14 ... Adjustment nut 14d ... Female thread part 14e, 14f ... Projection part 15 ... Holding plate 15a ... Insertion hole 15b ... Groove 15c ... concave portion 16 ... fixing screw 17 ... driver 18 ... printed board

Claims (1)

It is attached to the rear part of the frame of the electronic device, and is formed to be inclined obliquely downward, and can be moved to an attachment plate in which an engagement hole is formed in the inclined part in the vertical direction, and to the engagement hole of the attachment plate. The engaging nut is fixed to the engaging hole of the mounting plate by screwing the adjusting nut having the female screw portion and the protruding portion and the fixing screw inserted through the root side into the female screw portion of the adjusting nut, and A pressing plate is provided in which the protruding portion of the adjusting nut is fitted in the groove provided in the lower portion, and the concave portion provided in the lower portion on the tip side is engaged with the upper portion of the printed board disposed in the frame body. A holding structure for a printed board of an electronic device.

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