JPH05275869A - Small casing for electric equipment - Google Patents

Abstract

PURPOSE:To improve an assembling and dismantling step for a small casing used for electric equipment, by minimizing the number of components, especially fixing screws, and unifying the direction of assembling. CONSTITUTION:A small frame box for electric equipment comprises a pair of upper and lower cases 2 and 1 that are placed oppositely, and an inserted component 3 in between. A fitting means 4 made up of each projected and recessed part is provided between the inserted component 3 and the upper case 2 or the lower case 1. Moreover, the direction of fitting by the fitting means 4 is made equal to the direction for assembling the upper case 2 and the lower case 1, which are joined by a fixing screw.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small electronic device housing. In recent years, electronic devices have been made lighter, thinner, shorter, and smaller, but for models with a short life cycle, it is desirable that they can be manufactured at low cost by reducing the number of component parts as much as possible and improving the workability of assembly / disassembly as well as downsizing. Has been done.

[0002]

2. Description of the Related Art As shown in an exploded perspective view of FIG. 2, a conventional small electronic device housing is composed of a front cover 13a which covers the upper and lower cases 11 and 12 and an operation panel 13b facing each other. It is assembled with screws from the direction.

The main circuit board 13 is placed inside the lower case 12.
Screw c in a state that it is floating horizontally from the inner surface of the bottom, screw the operation panel 13b to the front rising side wall 12a of the lower case 12, and then set the upper case 11 to the front rising side wall 12 of the lower case 12.
The front cover 13a is screwed to the upper ends of the a and the rear rising side wall 12b, and finally the front cover 13a that covers the operation panel 13b is screwed from the inside in order to prevent the screw from being visible in the front. Also, on the outer surface of the bottom of the lower case 12,
14 is screwed.

[0004]

However, according to the above-mentioned structure of the small electronic device housing, the components,
In particular, the number of mounting screws is large, and because the direction in which the components are combined and the direction in which the screws are tightened are not the same, it takes a long time to assemble / disassemble not only in the assembly process in the manufacturing process, but also at the user site, etc. There was a problem that was bad.

In view of the above problems, it is an object of the present invention to provide a small electronic device housing which can reduce the number of components, particularly the number of mounting screws as much as possible, and unify the assembly direction to improve the workability of assembly / disassembly. To do.

[0006]

In order to achieve the above object, in a small electronic device casing of the present invention, an upper and a lower case facing each other and an interposing component sandwiched between the upper and lower cases. The above-mentioned upper and lower cases and the interposition part are provided with engaging means for engaging with each other so as to engage with each other, and the engaging directions of the engaging means are the upper and lower cases. The upper and lower cases are connected by screwing.

[0007]

The upper and lower cases facing each other and the interposing parts sandwiched between them and assembled, for example, the front and rear covers, the main circuit board and the operation panel, are provided with engaging means having concave and convex engagement, and the engaging means. By unifying the direction to the combination (assembly) direction of the upper and lower cases, assembling / disassembling can be done only from one direction in the vertical direction, so the work can be performed in a short time, and it can be sandwiched between the upper and lower cases. The inserted interposer can be held so as not to move back and forth and left and right by only the combination engagement, and the number of components, especially the number of screws can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The gist of the present invention will be described in detail below with reference to the embodiments shown in the drawings. The exploded perspective view of FIG. 1 is shown (FIG. 1 shows a state in which the small electronic device casing is inverted upside down,
As above and below are expressed based on this figure),
The small electronic device housings are the upper and lower cases 2 and 1 (the upper case 2 in FIG. 1).
Is the lower case 11 of the conventional FIG. 2, and the lower case 1 is the conventional case of FIG.
Corresponding to the upper case 12), and the interposing component 3 sandwiched between the upper case 2 and the lower case 1, that is, the front and rear covers 3a, 3
It is composed of the main circuit board 3c and the operation panel 3d. Furthermore, when combining the upper and lower cases 2 and 1 in the vertical direction, the front and rear covers 3a and 3b, the main circuit board 3c, and the operation panel 3d are sandwiched between them, and the interposer parts 3 are mutually forward, backward, left and right. It is provided with the engaging means 4 which is formed by uneven engagement so as to regulate the positioning, and is assembled only by a mounting screw which is screwed in the vertical direction. The engaging means 4 is, as will be described later, an ear portion to be inserted into the bruise portion, a leg portion to be inserted into the holding rail, a holding portion facing the receiving portion, and the like.

The lower case 1 is made of sheet metal, and has left and right side walls 1a, 1
B is bent at a right angle to start up, and its both edges are inward
Left and right receiving parts 1a-1, 1b-1 that horizontally float and support the main circuit board 3c that is folded in the shape and sandwiched between the bottom inner surface and the creases 3a-1, 3a of the front and rear covers 3a, 3b. -The front and rear ear parts 1c and 1d were bent up at a right angle so that they could be inserted from above, and started up.
And the holding rail 1e that inserts the lower edge of the operation panel 3d, the left,
Screw holes 1a-1a, 1b-1 for screwing mounting screws 6 penetrating the pedestal 5, the upper case 2 and the main circuit board 3c to the right receiving portions 1a-1, 1b-1.
a and notches 1a-1b, 1b-1b for inserting the left and right side edges of the operation panel 3d from above and positioning-regulating the front-rear and left-right directions.

The upper case 2 is made of sheet metal, and the left and right side walls 2a, 2b are abutted against the left and right side walls 1a, 1b of the lower case 1.
Bend it up at a right angle and fold it up at its right edge inward at a right angle and sandwich the main circuit board 3c placed on the left and right receiving parts 1a-1 and 1b-1 of the lower case 1 between the left and right holding parts 2a. -1,2b-1 and
Before inserting the creases 3a-1, 3a-2 of the front and rear covers 3a, 3b from below, the rear ears 2c, 2d, the holding rail 2e for inserting the upper edge of the operation panel 3d, and the lower case 1 Left, right receiver 1a-
1, 1b-1 and a top hole (corresponding to the bottom surface) are provided with a through hole 2f into which a mounting screw 6 is inserted.

The front cover 3a is made of sheet metal, and is box-shaped so that the upper and lower edges of the front cover 3a are provided with U-shaped grooves for inserting the plate thicknesses of the front ears 1c and 2c of the lower cases 2, 1 from above and below. It is provided with upper and lower creases 3a-1 and 3a-2 bent in a letter shape, and a hole 3a-3 for letting out the display component 7 and the operation switch 8 provided on the operation panel 3d.

The rear cover 3b is made of sheet metal and has a box-like shape so that the upper and lower edges are up and U-shaped so as to form a groove into which the plate thickness of the rear ear portions 1d and 2d of the lower cases 2 and 1 is inserted from the vertical direction. The upper and lower creases 3b-1 and 3b-2 are folded into a letter shape.

The operation panel 3d is a circuit board with a metal core,
Bend into a trapezoid with upper and lower legs 3d-1 and 3d-2, and the bending height is the upper and lower cases 2, and the display part 7 mounted on the front part while being inserted into the holding rails 1e and 2e and the operation The size of the switch 8 and the like should be exactly visible through the hole 3a-3 of the front cover 3a.

The main circuit board 3c is a printed wiring board on which an electronic circuit is mounted, and a mounting hole 6 is a through hole 3c-1.
To drill. The above-mentioned components are assembled as follows.

The main circuit board 3c is placed on the left and right receiving portions 1a-1, 1b-1 of the lower case 1, and the lower leg portion 3d-2 of the operation panel 3d is placed on the left and right receiving portions 1a-1, 1b-. Insert into the notches 1a-1b and 1b-1b of 1 and insert into the holding rail 1e.

Then, the lower bruise portions 3a-2, 3b-2 of the front and rear covers 3a, 3b are inserted into the front and rear ears 1c, 1d of the lower case 1, respectively. Next, while covering the upper case 2 on the lower case 1 from above, operate the front and rear ears 2c, 2d on the upper knurled parts 3a-1, 3b-1 of the front and rear covers 3a, 3b, respectively. Insert the upper leg part 3d-1 of the board 3d into the holding rail 2e and at the same time hold down the main circuit board 3c with the left and right holding parts 2a-1 and 2b-1, and attach the mounting screw 6 inserted into the foot 5 to the main circuit board. The screw holes 1a-1a, 3c-1 of 3c and the screw hole 1f of the upper case 2 are penetrated.
A small electronic device housing is completed by screwing it into 1b-1a.

As described above, the front and rear covers, the main circuit board, and the operation panel are assembled so as to be sandwiched between the upper and lower cases in the vertical direction, and the projections and depressions are engaged so as not to move back and forth and left and right. Since the engaging means, that is, the ears to be inserted into the bruise section, the legs to be inserted into the holding rail, and the pressing section for sandwiching the main circuit board in the receiving section are provided, the assembling / disassembling directions are unified only in the vertical direction. It can be assembled / disassembled in a short time, and the number of components, especially the number of screws, can be reduced and workability can be improved.

[0018]

As described above in detail, according to the present invention,
By providing the engaging means that engages with each other in the vertical direction between the upper and lower cases, the assembly / disassembly direction can be unified only in the vertical direction, and the number of components, especially the number of screws Therefore, the assembly / disassembly work can be performed in a short time, and it can be applied to a small electronic device housing to improve productivity and manufacture at low cost, which is an extremely useful effect in the industry. Demonstrate.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a conventional technique.

[Explanation of symbols]

 1 is a lower case 2 is an upper case 3 is an insertion part 4 is an engaging means

Claims (1)

[Claims] 1. An upper and lower case (2, 1) facing each other, and an interposing component (3) sandwiched between the upper case (2) and the lower case (1), and the upper and lower cases. The engaging means (4) consisting of concave and convex engagement is provided between the (2,1) and the insertion part (3) so as to engage with each other, and the engaging direction of the engaging means (4) is set. The upper and lower cases
Unified to the combination direction of (2,1), upper and lower case (2,1)
A small electronic device housing characterized by being screwed together.