JPH0223012Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field of the invention This invention relates to a spring contact structure that easily brings the ceiling plate into contact with the panel part in a desk-top communication terminal case in which the ceiling plate can be inserted and removed in a sliding manner. It is.

(b) Prior art and problems Conventionally, for example, in a desktop communication terminal case, contact between a panel part on a printed board on which electronic components are mounted and a ceiling board is made by connecting screws or trap wires, or
Alternatively, this was done by a spring contact as shown in FIG. That is, FIGS. 1a and 1b are diagrams for explaining the conventional spring contact structure, and FIG. 1 is a plan view of the main part;
Figure b is a side sectional view of the main part.

In these two figures, 1 is a printed board on which an electronic circuit (not shown) is mounted and attached to the bottom plate 4, 2 is a front panel provided on the printed board 1, and at least A spring contact piece 3 made of an elastic member bent into an inverted V shape is fixed by spot welding or the like. By sliding the ceiling plate 5 horizontally onto the front panel 2 from behind as indicated by arrow A, the ceiling plate 5 comes into contact with the spring contact piece 3 and is pushed downward. By contacting and engaging with the front panel 2, the internal electronic circuit is shielded from external electromagnetic wave noise or static electricity noise.

However, since the ceiling plate 5 that is slid onto the front panel 2 is slid from the bending direction opposite to the fixed side of the spring contact piece 3, the ceiling plate 5 is attached to the spring contact piece 3. When it comes into contact with a free bent part, the bent part is pressed as shown by the chain line and is bent abnormally, making it impossible for the ceiling board 5 to be inserted properly or being easily broken. There was a problem in that the durability of the spring contact piece 3 was significantly reduced. There is also the problem that shielding against external electromagnetic noise or static electricity noise is insufficient.

(c) Purpose of the invention In view of the above-mentioned conventional problems, the present invention improves the mounting structure of the spring contact piece provided at the folded part of the upper part of the front panel, and eliminates abnormalities in the spring contact piece when the ceiling panel comes into contact with it. The object of the present invention is to provide a spring contact structure that eliminates bending, breakage, etc., and improves the durability of the spring contact piece.

(d) Structure of the invention In order to achieve the above-mentioned object, the invention has a printed board on which an electronic circuit is mounted on the bottom plate, a front panel is attached to the front end of the printed board, and a folded back panel is attached to the top of the front panel. In the spring contact structure, the folded part at the top of the front panel is partially extended rearward to form a mounting bracket part. At the same time, a mounting hole is provided in the mounting bracket part, and the rear end of the inverted V-shaped spring contact piece for engagement with the ceiling plate is fixed to the back surface of the rear side, and the inverted V-shaped spring contact piece is This is achieved by a configuration in which the peak portion protrudes from the mounting hole.

(e) Embodiments of the invention Examples of the invention will be described in detail below with reference to the drawings.

2A and 2B are diagrams for explaining an embodiment of the spring contact structure according to the present invention, where FIG. 2A is a plan view of the main part and FIG. 2B is a side sectional view of the main part. Note that in FIGS. 1a and 1b, the same parts are given the same reference numerals.

In both of these figures, a folded portion 6 at the top of a front panel 6 is mounted with an electronic circuit (not shown) and is placed at the front end of the printed board 1 fixed to the bottom plate 4.
A is partially extended rearward to form a mounting metal part 61, and a mounting hole 62 is provided in the mounting metal part 61.

Further, on the back surface of the rear part of the mounting hole 62 in the mounting bracket part 61, there is a spring contact piece bent in an inverted V shape for contact engagement with the ceiling plate 5, which will be described later, that is, the rear end of the inverted V-shaped spring contact piece 3. are fixed by spot welding or the like, and the bent ridge portion of the inverted V-shaped spring contact piece 3 is made to protrude from the mounting hole 62.

Therefore, a ceiling plate 5 is placed on such a front panel 6.
Slide horizontally from the rear indicated by arrow A,
By bringing the fixed side of the spring contact piece 3 into contact with the spring contact piece 3 protruding from the mounting hole 62 provided in the mounting bracket 61, the spring contact piece 3 protruding from the mounting hole 62 can smoothly move downward. It is possible to very easily insert it onto the front panel 6 in a state in which it is pressed down and electrically engaged with the ceiling plate 5, thereby preventing external electromagnetic wave noise or static electricity noise from being caused to the internal electronic circuit. can be shielded.

In addition, in the above embodiment, an example is described in which a single mounting hole 62 and a single spring contact piece 3 are provided in the mounting bracket part 61 which is provided by partially extending the folded part 6a at the top of the front panel 6 rearward. However, the present invention is not limited to this example, and for example, a plurality of mounting holes and spring contact pieces may be provided in the width direction of the mounting metal part.

(f) Effect of the invention As is clear from the above explanation, according to the spring contact structure according to the invention, the spring contact piece fixed to the mounting bracket provided by extending the folded part of the upper part of the front panel backward On the other hand, since the ceiling plate is inserted onto the front panel by sliding it from the fixed side of the spring contact piece, the contact engagement of the ceiling plate with the spring contact piece is done effortlessly and smoothly. This eliminates the risk of abnormal bending or breakage of the spring contact piece, which improves durability, and shields the electronic circuit inside the casing from external electromagnetic noise or static electricity noise, increasing durability. This greatly contributes to improving the characteristics of digital communication terminals.

[Brief explanation of the drawing]

Figures 1a and 1b are diagrams for explaining a conventional spring contact structure. Figure a is a plan view of the main part, Figure b is a side sectional view of the main part, and Figures 2a and b are views of the spring according to the present invention. FIG.
is a plan view of the main part, and Figure b is a side sectional view of the main part. Second
In figures a and b, 1 is a printed board, 3 is a spring contact piece, 4 is a bottom plate,
5 is a ceiling plate, 6 is a front panel, 6a is a folded portion, 61 is a mounting fitting portion, and 62 is a mounting hole.

Claims (1)

[Claims for Utility Model Registration] A printed board 1 on which an electronic circuit is mounted is mounted on a bottom plate 4, and a front panel 6 is attached to the front end of the printed board 1. In the spring contact structure in which the spring contact piece 3 contacts and engages the ceiling plate 5 that is slid in from the top, the folded part 6a at the top of the front panel 6 is partially extended rearward to form the mounting bracket part 61. At the same time, a mounting hole 62 is provided in the mounting bracket part 61, and the rear end of the inverted V-shaped spring contact piece 3 for engagement with the ceiling plate 5 is fixed to the back surface of the rear side. A spring contact structure characterized in that the peak portion of the spring contact piece 3 is made to protrude from the mounting hole 62.