JPS6129199A - Structure of housing - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a housing, and particularly to a structure of a housing in which the housing has a closed structure to prevent static electricity noise.

When using a terminal for various communication networks, such as an optical network, on a desk, it is necessary to make the housing a closed structure and to ground the housing of the external line connector through the housing in order to prevent static electricity noise.

[Conventional technology]

Figure 3 shows the housing of an optical network terminal that has measures taken to prevent static electricity noise. That is, FIG. 3 is a side sectional view (al is a perspective view, and 载) is for explaining the structure of a conventional casing.

A connector mounting plate 2 on which a plurality of external connection connectors 7 are attached to the lower part of the front surface (printed board insertion side) of an external housing 1 made of a metal such as aluminum that shields external noise.
and a front cover 3, and has a plurality of elasticities.
A shelf 4 on which a plurality of printed boards 5 are mounted is mounted in an external housing 1 attached with 0, and an external connection connector 7 and a connector 6 attached to the printed board 5 are connected with a connector connection cable 8. After that, the front cover 3 is fixed with screws (not shown) or the like.

[Problem that the invention seeks to solve]

In the structure of the case configured as described above, since it is necessary to provide the shelf 4 above the connector mounting plate 2 in order to insert and remove the printed board 5, the height of the case (H) increases and the connector Since a connection space is required for the connector connection cable 8 that connects the external connection connector 7 attached to the mounting plate 2 and the connector 6 attached to the printed board 5, the depth (D) increases, so the overall Each had its own problems, such as poor space factor, high number of parts, uneconomical performance, and poor work efficiency.

[Means for solving problems]

The present invention solves the above-mentioned problems and provides a casing that has a good space function and improved work efficiency.The present invention provides a casing that can accommodate the printed board on the printed board insertion side of the casing. A plurality of holes are formed, a plurality of covers are provided to overlap the holes, a connector insertion hole is formed in the cover to connect to the printed board, and a pair of This is achieved by attaching a contact piece.

[Function] The structure of the above-mentioned casing has a plurality of external connectors installed in the external casing in order to directly connect the external line connectors to the connectors on the printed circuit board without using a connector mounting plate for attaching the plurality of external connection connectors to which the external line connectors are connected. A printed board insertion/extraction hole is provided, and a lid with a connector insertion hole is attached to the printed board insertion/extraction hole.
It is a practical product with a good space factor, reduced number of parts, and improved work efficiency.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the structure of a casing according to the present invention will be described in detail below with reference to the drawings.

1 and 2 are for explaining one embodiment of the structure of the casing according to the present invention, and FIG. 1+a+ is a perspective view, and FIG.
(C) is a cross-sectional plan view of the main part, (C) is a side sectional view of the main part,
Figures (al is a perspective view of the main parts of the connector insertion part, (b) is a plan view of the main parts before the connector is inserted, (C) is a plan view of the main parts with the connector inserted, and the same parts as in Figure 3 are the same) A symbol is attached.

As shown in Fig. 1 fa+, (bl, fc), a shelf 4 is inserted into the front (printed board insertion side) of an external casing 11 made of a metal such as aluminum that shields external noise. A plurality of printed board insertion/extraction holes 111 corresponding to the printed board 5 to be inserted are provided, and guide holes 112 and screw holes 113 are bored around the printed board insertion/extraction holes 111 (see FIG. 2(a)). In order to shield external noise from entering through the printed board insertion/extraction hole 111, the outer housing 11 is attached to a lid 12 made of metal, such as aluminum, as shown in FIGS.
A guide pin 13 is implanted at a position corresponding to the guide hole 112 drilled on the front surface of the lid 12, and a tightening hole 122 is drilled corresponding to the screw hole 113, and a connector insertion hole 121 is further drilled in the lid 12. Then, a pair of contact pieces 15 made of conductive metal and having elasticity are welded to each other on both sides of the connector insertion hole 121 in the longitudinal direction to ensure good conductivity.

Then, after inserting the printed board 5 into the shelf 4 in the external housing 11 through the printed board insertion/extraction hole 111, the lid 12 with the contact piece 15 attached to the printed board insertion/extraction hole 111 is fitted with the tightening screw 14, and the external line The connector 9 is inserted into the connector insertion hole 121 of the lid 12 to which the contact piece is welded, and the connector 6 attached to the printed board 5 is connected.

However, when the external line connector 9 is inserted into the connector insertion hole 121, the housing of the external line connector 9 contacts the elasticity of the contact piece 15 welded to the connector insertion hole 121, so external noise from the external line connector 9 is absorbed by the contact piece 15. It is grounded through the external casing 11.

〔Effect of the invention〕

As is clear from the above description, the structure of the tabletop type casing according to the present invention improves the space factor on the tabletop, improves work efficiency, and has extremely large economic effects.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1 and 2 are diagrams for explaining an embodiment of the structure of a housing according to the present invention.
(C) is a cross-sectional plan view of the main part, (C) is a side sectional view of the main part,
Figure (a) is a perspective view of the main parts of the connector insertion part, (b) is a plan view of the main parts before the connector is inserted, (C) is a plan view of the main parts with the connector inserted, and Figure 3 shows the conventional housing. For explaining the structure (al is a perspective view, (b) is a side sectional view. In the figure, 1.11 is an external casing, 2 is a connector mounting plate, 3 is a front cover, 4 is a shelf, and 5 is a side sectional view. Printed board, 6 a connector, 7 an external connector, 8 a connector connection cable, 9 an external line connector, 10 a buffer member, 12 a lid, 1
3 is a guide pin, 14 is a tightening screw, 111 is a printed board insertion/extraction hole, 112 is a guide pin hole, 113 is a screw hole, 12
1 indicates a connector insertion hole, and 122 indicates a tightening hole. Figure 1 CG) (b) Figure 3 (G)

Claims (1)

[Claims] A plurality of holes corresponding to the printed boards are bored on the printed board insertion side of the casing, a plurality of covers are provided to overlap the holes, and a connector insertion hole is formed in the lid to connect to the printed boards. . A structure of a housing, characterized in that a pair of contact pieces are attached to the connector insertion hole to face each other at least in the longitudinal direction.