JP2001291972A - Cover structure of electronic unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small and low-cost cover structure for an electronic unit. SOLUTION: A protruding part 3d, extending laterally from a sidewall 3c, is provided at an upper end 3a of the sidewall 3c of a frame 3. A cover 4 is hooked and fitted to the protruding part 3d with the cover 4 capped over the frame 3, so that the space required for hooking is small. A height H1 from the upper surface of a circuit board 1 to the upper end of the cover 4 is short, thus a cover structure suitable for a portable telephone set and the like which are demanded to be small is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover structure of an electronic unit suitable for use in a transmitting / receiving unit or the like used for a portable telephone.

[0002]

2. Description of the Related Art A cover structure of a conventional electronic unit is shown in FIG.
In the following, various electric components 12 are arranged on a circuit board 11 composed of a printed circuit board to constitute an electric circuit for transmission and reception. The box-shaped frame 13 made of a metal plate has a rectangular shape with an open top and bottom, and has two pairs of opposed upright side walls 13a and a hole 13b provided at an intermediate portion between the opposed side walls 13a. , This frame 1
Reference numeral 3 denotes a state in which the lower end of the side wall 13a is attached to the circuit board 11 by soldering or the like, and the electric component 12 is surrounded by the frame 13.

A cover 14 made of a metal plate is
a, a side wall 14b bent at right angles downward from four sides of the top wall 14a, an inwardly protruding projection 14c provided at an intermediate portion of the side wall 14b, and provided on each side wall 14b. And a flared end portion 14d. The cover 14 is placed on the frame 13 from above the frame 13, and the protrusion 14 c is
b and attached to the frame 13.

At this time, the cover 14 covers the open portion above the frame 13 to electrically shield the electric component 12, and the flared tip 14d is easy to cover when the cover 14 is attached to the frame 13. It serves as a guide for you.

[0005] The cover structure of the conventional electronic unit having such a structure is a conventional one provided with a hole 13 provided at an intermediate portion of the side wall 13a.
Since the protrusion 14c provided at the intermediate portion of the side wall 14b of the cover 14 is hung on the b, the space for the hanger increases, and the height H2 from the upper surface of the circuit board 11 to the upper end of the cover 14 increases. In particular, it is unsuitable for portable telephones and the like that require miniaturization.

[0006] When the height H2 is increased as described above, the frame 13 and the cover 14 require a large amount of material.
The cost was high.

[0007]

A conventional cover structure of an electronic unit includes a hole 13b provided at an intermediate portion of a side wall 13a.
A convex portion 1 provided at an intermediate portion of the side wall 14b of the cover 14.
4c, the height H2 from the upper surface of the circuit board 11 to the upper end of the cover 14 is increased, which is not suitable for a portable telephone or the like that requires miniaturization. In addition, when the height H2 is increased in this manner, a large amount of material for the frame 13 and the cover 14 is required, and there is a problem that the cost is increased.

Accordingly, an object of the present invention is to provide a small and inexpensive cover structure for an electronic unit.

[0009]

As a first means for solving the above problems, a box-shaped frame and a cover attached to the frame are provided. A configuration is provided in which a convex portion extending laterally from the side wall is provided, and the cover is hung on the convex portion in a state where the cover is placed on the frame.

[0010] As a second solution, the cover includes an upper wall, at least a pair of opposing side walls bent from the upper wall, and a concave portion provided at a root of the bent side wall. , And the convex portion is hung on the concave portion.

As a third solution, the frame has the side walls arranged so as to face each other, and at least a pair of the opposing side walls are directed from the upper end to the lower end on the cover side. Make a sloping shape
At least one pair of opposed side walls of the cover,
The upper side wall has a sloping shape diverging toward the front end portion, and the inclined side wall of the cover is overlapped with the inclined side wall of the frame, and the cover is hooked to the frame. The configuration was adopted.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a cover structure of an electronic unit according to the present invention. FIG. 2 is a sectional view showing a cover structure of the electronic unit according to the present invention. FIG.

Next, the structure of the cover structure of the electronic unit according to the present invention will be described with reference to FIGS. 1 and 2. Various electric components 2 are arranged on a circuit board 1 composed of a printed circuit board to transmit and receive data. Is configured.

A box-shaped frame 3 made of a metal plate or the like has a rectangular shape with an open top and bottom, two pairs facing each other, and an upper end 3
The side wall 3c has an inclined shape diverging from the lower end 3a toward the lower end 3b, and a protrusion 3d extending laterally from the upper end 3a of the side wall 3c. In addition, the frame 3 may be formed by applying a metal plating to the surface of a synthetic resin molded product.
The inclined side wall 3c may be provided on at least a pair of opposed side walls 3c, and the protrusion 3d may be provided on the inclined pair of opposed side walls 3c.

The flake 3 is attached to the circuit board 1 by soldering the lower end 3b of the side wall 3c to a conductive pattern (not shown) of the circuit board 1, and the electric component 2 is formed by the frame 3. Is enclosed.

The cover 4 made of a metal plate or the like has an upper wall 4a.
And a side wall 4b bent downward from four sides of the upper surface wall 4a, and a concave portion 4c formed of a hole or the like provided at the root of the bent side wall 4b. The side wall 4b has an inclined shape that diverges from the upper wall 4a toward the tip 4d.

The inclined side walls 4b may be provided on at least a pair of opposed side walls 4b, and the recess 4c may be provided on the root of the pair of inclined side walls 4b. Further, in addition to the hole, the recess 4c is provided with a kerf from the tip 4d to the root, and the kerf near the tip 4d is formed with a narrow width, and the kerf of the root is formed with a wide width. Good.

The cover 4 is put on the frame 3 from above the frame 3, the concave portion 4c is hung on the convex portion 3d, and the inclined side wall 4b is fixed to the inclined side wall 3c.
Is attached to the frame 3 in a state of being superimposed. At this time, the cover 4 covers the upper opening of the frame 3 to electrically shield the electric component 2, and the flared side wall 4 b makes the cover 4 easy to cover when the cover 4 is attached to the frame 3. Plays the role of guide.

The cover structure of the electronic unit according to the present invention having the above-described structure includes a convex portion 3d provided at the upper end portion 3a of the side wall 3c and a concave portion 4c provided at the root portion of the side wall 4b of the cover 4. In this case, the space for the latch can be reduced, and the height H1 from the upper surface of the circuit board 1 to the upper end of the cover 4 is small. is there.

Further, when the height H1 is reduced as described above, the material of the frame 3 and the cover 4 can be reduced as compared with the prior art, and an inexpensive one can be obtained.

[0021]

According to the electronic unit cover structure of the present invention, the upper end 3a of the side wall 3c of the frame 3 has
c, the cover 4 is hung on the projection 3d in a state in which the cover 4 is put on the frame 3 so that the space for hooking can be reduced, and The height H1 to the upper end of the cover 4 is small, and it is possible to provide a cover structure that is particularly suitable for a mobile phone or the like that requires miniaturization.

Further, when the height H1 is reduced as described above, the material of the frame 3 and the cover 4 can be reduced as compared with the prior art, and an inexpensive one can be obtained.

The cover 4 has an upper surface wall 4a, at least a pair of opposed side walls 4b bent from the upper surface wall 4a, and a concave portion 4c provided at the root of the bent side wall 4b. Since the convex portion 3d is hooked on the concave portion 4c, the height H1 from the upper surface of the circuit board 1 to the upper end of the cover 4 can be further reduced, and a compact cover structure can be provided.

The frame 3 has side walls 3c arranged to face each other, and at least one pair of the side walls 3c has an inclined shape diverging from the upper end 3a on the cover 4 side toward the lower end 3b. None, at least a pair of opposed side walls 4b of the cover 4
d, the inclined side wall 4b of the cover 4 is overlapped with the inclined side wall 3c of the frame 3, and the cover 4 is hooked on the frame 3. When attached to the, the role of a guide to make it easy to cover the inclined side wall 4b,
A cover structure that can be easily attached can be provided.

By making the side wall 3c inclined, the length from the concave portion 4c to the tip 4d can be increased, and the height of the side wall 3c can be reduced, so that a more compact cover structure can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a cover structure of an electronic unit of the present invention.

FIG. 2 is an explanatory view showing an assembly of the cover structure of the electronic unit of the present invention.

FIG. 3 is a cross-sectional view showing a cover structure of a conventional electronic unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Circuit board 2 Electric component 3 Frame 3a Upper end 3b Lower end 3c Side wall 3d Convex part 4 Cover 4a Top wall 4b Side wall 4c Concave part 4d Tip

Claims (3)

[Claims] 1. A frame comprising a box-shaped frame and a cover attached to the frame, wherein an upper end of a side wall of the frame is provided with a convex portion extending laterally from the side wall, and the cover is provided on the frame. The cover structure of the electronic unit, wherein the cover is hooked on the convex portion in a state where the cover is covered. 2. The cover includes an upper wall, at least one pair of opposing side walls bent from the upper wall,
2. A cover structure for an electronic unit according to claim 1, further comprising a concave portion provided at a bent portion of the side wall, wherein the convex portion is hung on the concave portion. 3. The frame has the side walls arranged so as to face each other, and at least a pair of the opposing side walls has an inclined shape diverging from the upper end to the lower end on the cover side. The at least one pair of opposed side walls of the cover form an inclined shape diverging from the upper surface wall side toward the tip, and the inclined side wall of the cover is formed on the inclined side wall of the frame. The cover structure of the electronic unit according to claim 2, wherein the cover is hung on the frame in an overlapping manner.