JPH0440307Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a structure for attaching a circuit board to a case of an electrical device such as a printer.

[Conventional technology]

In order to reduce the price of modern electrical equipment, cases are often molded in resin. Furthermore, since complex shapes can be obtained relatively easily with resin molds, shapes are becoming more diverse. One of them is one in which the operation surface is inclined and a plurality of push button switches and the like are arranged side by side on this operation surface. In this structure, the key top height of the push button switch will not be constant unless the circuit board to which the push button switch is attached is arranged parallel to the operating surface with the same angle of inclination as the operating surface. The circuit board is therefore mounted parallel to the inclined operating surface.

FIG. 6 shows an example of a conventional structure in which a circuit board is attached to an inclined operation surface. In this structure, a mounting seat 4 to which a circuit board 3 is mounted is provided on the back surface of the inclined surface portion 2 of the case 1. The mounting seat 4 is not formed in a shape extending perpendicularly to the inclined surface portion 2 from the mold structure (as shown by a dashed line in FIG. 6), but is formed in a horizontal direction. The protruding end surface 4A is inclined parallel to the inclined surface portion 2, and the circuit board 3 is brought into contact with the protruding end surface 4A so that the circuit board 3 is parallel to the inclined surface 2. In addition, a screw hole 4B is provided in the mounting seat 4, and a long hole 5 corresponding to the screw hole 4B is formed in the circuit board 3, and a screw 6 is screwed through the long hole 5 into the screw hole 4B to attach the circuit board 3 to the mounting seat 4. Fixed.

<<Problems to be solved by the invention>> In this structure, since the circuit board 3 is inclined with respect to the direction in which the screws 6 are screwed in, the screws 6 cannot be tightened on the surface of the circuit board 3 and come into point contact with the circuit board 3. Tightened in shape. Therefore, there was a problem in that the tightening force became weak and sufficient tightening could not be performed.

The present invention was developed in view of the above points, and it is an object of the present invention to provide a structure for mounting a circuit board to a case, which is structured to provide sufficient tightening force when mounting the circuit board on an inclined surface.

<<Means for Solving the Problems>> In order to achieve the above object, the present invention has a circuit board disposed on a mounting seat formed on an inclined surface portion of a resin case substantially parallel to said inclined surface portion, and This is a mounting structure for mounting a circuit board to a case by passing a long hole formed in the circuit board into a screw hole of a mounting seat and fixing the circuit board with screws, and one end surface that comes into contact with the circuit board is generally referred to as the inclination angle of the circuit board. one end surface is provided with a protrusion corresponding to the longitudinal end of the elongated hole, and the other end surface is formed with a surface perpendicular to the insertion direction of the screw, and the screw is It is configured to be secured with screws via a spacer provided with a through hole for insertion.

<<Operation>> According to the present invention, the screw is in surface contact with the other end surface of the spacer, and since no lateral force is applied to the screw during tightening, the screw can be fastened in the correct direction. Therefore, the tightening force becomes stronger and the attachment can be ensured.

<<Example>> Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing a mounting structure according to an embodiment of the present invention. In FIG. 1, the same reference numerals as in FIG. 6 indicate the same components as in FIG. The spacer 7 attached to each elongated hole 5 of the circuit board 3 is molded from resin, and one end surface 8 that contacts the circuit board 3 is a surface inclined at the same angle as the inclined surface 2. Further, on this end surface 8, a pair of protrusions 9 of equal length corresponding to both longitudinal ends of the elongated hole 5 are formed extending in the direction of the mounting seat 4, and further, a tip of each protrusion 9 is formed. The surface 9A is also inclined at the same angle as the one end surface 8. and,
On this one end surface 8 side, when the protrusion 9 is inserted into the elongated hole 5, the tip surface 9A of the protrusion 9 comes into contact with the tip surface 4A of the mounting seat 4, and the one end surface 8 comes into contact with the top of the circuit board 3. It is configured to be in a state. The other end surface 10 of the spacer 7 is formed with a surface perpendicular to the insertion direction of the screw 6, and the spacer 7
has a through hole 11 corresponding to the screw hole 4B of the mounting seat 4.
is formed.

When the circuit board 3 is screwed to the mounting seat 4, the protrusion 9 of the spacer 6 is inserted into the elongated hole 5 of the circuit board 3.
into the through hole 1, and then insert the screw 6 into the through hole 1.
1 and screw it into the screw hole 4B of the mounting seat 4.

Therefore, in this structure, the spacer 6 is finally
Since the tightening surface of the screw 6 is pressed against the other end surface 10, the screw 6 is tightened in a plane, and no lateral force is applied to the screw 6 during this tightening. Further, when the screw 6 is tightened, the rotation of the spacer 6 is stopped by the engagement between the protrusion 9 of the spacer 6 and the through hole 5 of the circuit board 3.

<<Effects of the invention>> As explained above, according to the present invention, the screw is tightened in surface contact with the other end surface of the spacer, and since no lateral acting force is applied to the screw,
The screws can be tightened in the correct direction and stably. As a result, the circuit board can be reliably attached to the case.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a mounting structure according to an embodiment of the present invention, FIG. 2 is a partially enlarged view of a circuit board taken along line A-A in FIG. An enlarged plan view of the spacer taken along line A-A in the figure,
FIG. 4 is an enlarged plan view of the spacer taken along line B-B in FIG. 1, and FIG. 5 is a side view of the same spacer.
FIG. 6 is a sectional view showing a conventional mounting structure. 1... Case, 2... Inclined surface part, 3... Circuit board, 4... Mounting seat, 4B... Screw hole, 5... Long hole, 6... Screw, 7... Spacer, 8... Spacer's One end surface, 9... protrusion, 10... other end surface of the spacer.

Claims (1)

[Scope of utility model registration request] A case in which a circuit board is arranged on a mounting seat formed on an inclined surface part of a resin case substantially parallel to said inclined surface part, and is screwed through a long hole formed in said circuit board through a screw hole in said mounting seat. In the circuit board mounting structure, one end surface that comes into contact with the circuit board is formed with an inclined surface substantially equal to the inclination angle of the circuit board, and the one end surface has a shape corresponding to the longitudinal end of the elongated hole. In addition to providing a protrusion, the other end surface is formed with a surface perpendicular to the direction in which the screw is inserted, and the spacer is configured to be fastened with a screw through a spacer provided with a through hole into which the screw is inserted. Features a structure for mounting the circuit board to the case.