JPS6228796Y2 - - Google Patents

Description

Detailed Description of the Invention The present invention relates to a chassis for electronic devices, and more particularly to a chassis on which electronic device components such as printed circuit boards are mounted.

As is well known, a large number of circuit components are attached to printed wiring boards used in electronic devices.
Then, the main body of the circuit component is mounted on the component mounting surface of the printed wiring board in a protruding state, and the terminal of the circuit component is soldered to the wiring pattern with the protruding state on the wiring pattern surface (back side) of the printed wiring board. ing. Therefore, when a printed wiring board or the like is attached to the chassis, it is necessary to configure the printed wiring board to be attached at a position separated from the chassis by a certain space.

FIG. 1 shows a conventional chassis for electronic equipment, and a chassis 1 made of sheet metal has a bent portion 2 provided with a cut-and-raised piece 3. The cut and raised piece 3 is bent inward at a substantially right angle with respect to the bent portion 2, and is disposed substantially parallel to the base portion 1a of the chassis 1. Further, a screw insertion hole 4 is provided at the drip contact location of the cut and raised piece 3. Although not shown in the drawings, the chassis 1 is provided with a plurality of bent portions 2 and cut and raised pieces 3 as described above.

As shown in FIG. 1, a printed wiring board 5 is placed on the cut-and-raised piece 3 and fixed with set screws 6.

However, in the case of such a chassis 1, when attaching the set screws 6 using a screwdriver 7 as shown in FIG. Since a relatively large thrust in the direction of arrow A is applied to the cut and raised piece 3 through the opening, the cut and raised piece 3 is likely to be forcibly bent in the direction of arrow B in FIG.
Therefore, there was a problem in that it was very difficult to attach the printed wiring board 5 to the cut and raised piece 3.

The present invention has been devised to solve the above-mentioned disadvantages, and even when a thrust force is applied to the cut-and-raised piece for attaching the part when installing the part to the chassis, the bending of this cut-and-raised piece is prevented. It is an object of the present invention to provide a chassis for electronic equipment that is configured to reliably prevent the above problems and to efficiently perform the work of attaching parts.

An embodiment in which the present invention is applied to a chassis of a switching regulator will be described below with reference to FIGS. 3 to 6.

As shown in FIG. 3, the chassis 10 includes a base plate 1
1 and a bent portion 12 formed by bending a part of this substrate portion 11 at a substantially right angle. The substrate portion 11 is provided with a vertical cut-and-raised piece 13, while the bent portion 12 is provided with a horizontal-shaped cut-and-raised piece 14 that is bent at a substantially right angle. The cut and raised piece 13 is configured to be approximately parallel to the bent portion 12 of the chassis 10, and the other cut and raised piece 14 is configured to be approximately parallel to the base portion 11 of the chassis 10. .

Further, as is clear from FIGS. 3 and 6, there are legs 1 on both sides of the tip (free end) of the cut and raised piece 14.
5 and 16 are bent vertically. The lower end surfaces 15a and 16a of the pair of leg portions 15 and 16 are engaged with the tip surface 13a of the cut and raised piece 13. Further, screw insertion holes 17 are formed at appropriate locations in the above-mentioned cut and raised piece 14, and by using these screw insertion holes 17, a printed wiring board 18 can be mounted on the cut and raised piece 14. ing. If necessary, cut and raised pieces 13 and 14 similar to those described above may be provided at a plurality of locations, and one printed wiring board 18 may be placed on the plurality of cut and raised pieces 14.
You may also install it.

Next, the procedure for manufacturing the chassis 10 having the above-described structure will be described.

First, a notch 20 having a shape as shown in FIG. 4 and a circular screw insertion hole 17 are punched out using a press or the like in a sheet metal 10' for chassis manufacture. Then, by bending the sheet metal 10' along the bending lines 21, 22, 23, and 24 at right angles to the directions shown by the arrows in FIG. 14 respectively. Thereafter, this sheet metal 10' is bent along the folding line 25 at right angles in the direction indicated by the arrow in FIG. 5 to form the base plate part 11 and the bent part 12. In addition, along with this, the surface 1 of the leg portion 15 of the cut and raised piece 14
5a and 16a are placed on and engaged with the distal end surface 13a of the cut and raised piece 13, and as a result, the legs 15 and 16 of the cut and raised piece 14 and the cut and raised piece 13 It crosses the piece 14 at right angles.

When the printed wiring board 18 is mounted on the cut and raised piece 14 of the chassis 10, the printed wiring board 18 will be placed at a position separated from the board portion 11 of the chassis 10 by a certain predetermined space.

According to the chassis 10 configured in this way,
Cut-and-raised piece 1 to which printed wiring board 18 is attached
The legs 15 and 16 of the four legs are reliably supported by the vertical cut and raised pieces 13. In other words,
The tip (free end) of the cut and raised piece 14 cut and bent to attach the printed wiring board 18 to the chassis 10
is supported by the other cut and raised piece 13, thereby reinforcing the cut and raised piece 14. Therefore, in order to mount the printed wiring board 18 on the cut and raised piece 14, when screwing the set screw 27 into the nut 29 with the driver 28, as shown in FIG. Even if a fairly large thrust is applied, there is no risk that this cut and raised piece 14 will bend. 10
The work of attaching the printed wiring board 18 to the can be easily and efficiently carried out. Moreover, when making the chassis 10 thinner (and thus lowering the cost), it is extremely effective as a reinforcing means for a sheet metal chassis.

Although the present invention has been described above with reference to one embodiment, the present invention is not limited to this embodiment, and various modifications can be made based on the technical idea of the present invention.

For example, in this embodiment, the legs 15 and 16 provided at the tip of the cut and raised piece 14 are connected to the other cut and raised piece 13.
Although the configuration is such that it is engaged with the tips of the cut and raised pieces 13 and 14, the present invention is not limited to this, and any configuration may be used as long as the tips of the cut and raised pieces 13 and 14 are substantially perpendicular to each other. . Also printed wiring board 1
Not limited to 8, but other electronic equipment parts cut and raised piece 1
It may be installed on top of 4. It goes without saying that the present invention is applicable not only to the chassis 10 of a switching regulator, but also to the chassis of various electronic devices.

As described above, the present invention includes a substrate portion and a bent portion formed by bending a part of this substrate portion,
A first cut and raised piece (for example, the cut and raised piece 13 shown in the example) is provided on the substrate part, and a second cut and raised piece (for example, the cut and raised piece shown in the example) is provided on the bent part. A cutting piece 14) is provided, and the tip end of the second cutting piece is engaged with the tip end surface of the first cutting piece so that the first cutting piece and the second cutting piece are substantially orthogonal to each other. By attaching a component (for example, the printed wiring board 18 shown in the embodiment) to the second cut-and-raised piece, the component is placed at a position spaced apart from the substrate section. It is something. Therefore, according to the chassis of the electronic device of the present invention, the second cut-and-raised piece on which the component is attached is reliably supported and reinforced by the first cut-and-raised piece, so that the second cut-and-raised piece on which the component is attached is reliably supported and reinforced by the first cut-and-raised piece. Even if a fairly large acting force such as thrust is applied to the cut and raised pieces 2, the pieces are maintained at a predetermined position without being deformed. Therefore, the parts can be easily and efficiently attached to the chassis, and the parts can be reliably held at a predetermined position spaced apart from the base plate of the chassis. Moreover, the present invention is very practical and effective as a reinforcing means for a sheet metal chassis when the chassis is made thinner to reduce costs.

[Brief explanation of the drawing]

1 and 2 show a conventional chassis for electronic equipment, in which FIG. 1 is a perspective view of the main parts of the chassis, and FIG. 2 is a sectional view taken along the line -- in FIG. 1. Figures 3 to 6 show an embodiment in which the present invention is applied to the chassis of a switching regulator. Figure 3 is a perspective view of the main parts of the chassis, and Figure 4 is a manufactured chassis. FIG. 5 is a perspective view of the sheet metal with a pair of cut and raised pieces formed by bending, and FIG. 6 is a sectional view taken along the line - in FIG. 3. . In addition, in the symbols used in the drawings, 10
... Chassis, 11 ... Base part, 12 ... Bent part, 13 ... Cut and raised piece, 13a ... Tip surface, 14
... cut and raised pieces, 15, 16 ... legs, 18 ... printed wiring board.

Claims (1)

[Scope of utility model registration request] A substrate portion and a bent portion formed by bending a part of the substrate portion are respectively provided, and the substrate portion is provided with a first cut and raised piece, and the bent portion is provided with a second cut and raised piece. and engaging the distal end portion of the second cut-and-raised piece with the distal end surface of the first cut-and-raised piece so that the first and second cut-and-raised pieces are substantially orthogonal to each other; 1. A chassis for an electronic device, characterized in that the parts are placed at a position spaced apart from the substrate part by attaching the parts to the two cut and raised pieces.