JPH10256750A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure good electrical performance by fixing a cover to a housing, while covering an opening and abutting a protrusion against an upper wall in the vicinity of the open part of the cover, thereby surely grounding the cover at the free end thereof. SOLUTION: An upper cover 9 locates an open end 9d and a protrusion 9e in the vicinity of a connector 8, while circumventing the connector 8 and fixed by fitting the fixing parts 9b to the sidewall 4a of a housing 1, while covering the upper opening 2 of the housing 1 partially with the upper wall 9a and bringing the lower surface of the protrusion 9e into a resilient contact with the forward end of a protrusion 5 on the housing 1. A lower cover 10 covers the lower opening of the housing 1 entirely with the lower wall 10a thereof and fixed by fitting fixing parts 10b to the sidewalls 4a, 4b of the housing 1. Since the cover can be grounded at the opened end, electrical performance is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device such as a transmitting / receiving unit used for a portable telephone.

[0002]

2. Description of the Related Art As shown in FIG. 3, in a conventional electronic device such as a transmission / reception unit used for a portable telephone, a box-shaped housing 20 having upper and lower openings has one side wall 21 formed low. I have. A printed circuit board 22 on which a desired circuit is formed is mounted in the housing 20 and
A part of the printed board 22 projects outward from the side wall 21, and a connector 23 is attached to the printed board 22 near the side wall 21, and another connector (not shown) is attached to the connector 23. ) To connect the electric circuit.

An upper cover 24 is provided on a rectangular upper wall 24a, a spring-like mounting portion 24b which is bent from three ends of the upper wall 24a and extends downward, and one side surface. And an opened portion 24c. The cover 24 avoids the connector 23, positions the open portion 24c near the connector 23, and covers a part of the upper opening of the housing 20 with the upper wall 24a.
b is elastically attached to the side wall of the housing 20.
Further, the lower cover 25 includes a rectangular lower wall 25a and a spring-like mounting portion 25b that is bent from four edges of the lower wall 25a and extends upward. The lower wall 25a covers the entire opening at the lower portion of the housing 20, and the mounting portion 25b is attached by elastically contacting the side wall of the housing 20.

[0004]

In a conventional electronic device, one end of a cover 24 provided with an opening 24c is a free end and is in a state of being suspended in the air. There is a problem in that the grounding is uncertain and the electrical performance is poor.

[0005]

As a first means for solving the above problems, a cover having an attachment portion bent from an upper wall and having an open portion on at least one side surface, A box-shaped housing having a protrusion provided on a side plate and an opening, wherein the cover is attached to the housing so as to cover the opening, and the protrusion is provided on the cover in the vicinity of the opening of the cover. It was configured to contact the wall. As a second solution, a printed board housed in the housing is attached to the housing, and the protrusion formed on a side plate of the housing projects through the printed board, and the protrusion is formed. Was made to abut on the upper wall. Further, as a third solution, a projecting portion extending from an open end is provided on the upper wall of the cover, and the tip of the projecting portion is brought into contact with the projecting portion.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an electronic apparatus according to the present invention will be described with reference to a transmission / reception unit used in a portable telephone as an example.
FIG. 1 is a perspective view of an electronic device as a transmission / reception unit, and FIG. 2 is a cross-sectional view of a main part thereof. As shown in FIGS. 1 and 2, a box-shaped housing 1 made of a metal plate includes upper and lower openings 2 and 3 and one side wall 4 lower than the other side walls 4 a.
b and a protrusion 5 protruding upward from one end of the side wall 4b. A printed circuit board 6 on which a desired circuit (not shown) is formed is mounted in the housing 1, and a part of the printed circuit board 6 protrudes from the side wall 4 b to the outside of the housing 1, and The protrusion 5 protrudes upward through a hole 7 provided in the printed circuit board 6.

A connector 8 is attached to the printed circuit board 6 located in the housing 1 near the side wall 4b, and another connector (not shown) is attached to the connector 8.
Is connected, the electric circuit of the electronic device is connected to the outside. The upper cover 9 includes a rectangular upper wall 9a, a spring-like mounting portion 9b that is bent from three ends of the upper wall 9a and extends downward, and an opening provided on one side surface. It has a portion 9c and a spring-like protrusion 9e extending from an open end 9d of the open portion 9c. And this cover 9 avoids the connector 8,
The open end 9 d and the protruding portion 9 e are located near the connector 8, and a part of the upper opening 2 of the housing 1 is covered with the upper wall 9 a,
The mounting portion 9b is mounted so as to be sandwiched between the side walls 4a of the housing 1, and the lower surface of the protruding portion 9e is in elastic contact with the tip of the protruding portion 5 of the housing 1. That is, the tip of the projection 5 is in contact with the projection 9e located near the opening 9d.

The lower cover 10 includes a rectangular lower wall 10a, and a spring-like mounting portion 10b which is bent from four edges of the lower wall 10a and extends upward. The cover 10 covers the entire opening 3 at the lower portion of the housing 1 with its lower wall 10a, and is attached with the mounting portion 10b sandwiched between the side walls 4a and 4b of the housing 1. The shapes and numbers of the protrusions 5 and the protrusions 9e are not limited to those in the above-described embodiment, but may be various shapes or a plurality of shapes.

[0009]

According to the electronic device of the present invention, since the projection of the housing is brought into contact with the vicinity of the open portion of the cover, the open end of the cover can be grounded, and the electronic device with good electrical performance can be obtained. Can be provided. In addition, since the protrusion provided on the side wall is made to penetrate the printed circuit board and abut on the cover, a simple grounding structure can be obtained without increasing the number of parts, and the space factor is good. It is possible to provide a compact device. Further, since the protrusion extending from the open end of the cover is in contact with the protrusion, the protrusion can be provided with a spring property and a reliable contact can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electronic device according to the invention.

FIG. 2 is a sectional view of a main part of an electronic apparatus according to the invention.

FIG. 3 is a perspective view of a conventional electronic device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2, 3 Opening 4a Side wall 4b Side wall 5 Projection 6 Printed circuit board 7 hole 8 Connector 9 Cover 9a Upper wall 9b Attachment 9c Open 9d Open end 9e Projection 10 Cover 10a Lower wall 10b Attachment

Claims (3)

[Claims] A cover having an attachment portion bent from an upper wall, an open portion on at least one side surface, and a box-shaped housing having a protrusion and an opening provided on a side plate; An electronic device, wherein the cover is attached to the housing so as to cover the opening, and the projection abuts on the upper wall near the opening of the cover. 2. A printed circuit board housed in the housing is attached to the housing, the protrusion formed on a side plate of the housing penetrates through the printed circuit board, and the tip of the protrusion is The electronic device according to claim 1, wherein the electronic device is in contact with an upper wall. 3. The electronic device according to claim 1, wherein a projection extending from an open end is provided on an upper wall of the cover, and a tip of the projection is brought into contact with the projection. .