JP2921467B2 - Plug-in mounting panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a panel which is plug-in mounted on a shelf constituting an electronic circuit device, and more particularly to a contact spring mounting structure of the panel.

[0002]

2. Description of the Related Art In an electronic circuit device constituting a communication device or the like, in order to meet the demand for reduction in size and weight, a plurality of panels, each of which has a circuit configuration by mounting electric components on a printed circuit board, are mounted on a shelf (mounting shelf or mounting frame). Plug-in mounting that can be freely inserted and removed in parallel to the PC. For example, the shelf includes upper and lower plates provided with a plurality of opposed guide rails, left and right side plates, and a backboard provided with a connector for connection. Then, the panel is slid along guide rails provided on the upper and lower plates of the shelf, and a connector provided on the rear portion of the panel is plug-in-connected to a connection connector provided on the backboard.

FIGS. 4 and 5 are views showing an example of the configuration of a conventional plug-in mounting panel. FIG. 4 is a perspective view of the panel, and FIG. 5 is a sectional view of a main part of the panel.

As shown in FIG. 4, a panel 100 has a metal front plate 104 attached to the front of a printed circuit board 101 on which circuit components (not shown) are mounted.
A connector 102 for plug-in connection to a backboard (not shown) of the shelf is provided at the rear of the device 1 and is mounted on the shelf (not shown) in the direction of arrow A. When all the panels 100 have been mounted on the shelf, the front plates 104 are arranged side by side to close and shield the openings of the shelf.

A ground pattern 103 is provided on the front edge of the printed circuit board 101, and a part of the metal front plate 104 extends and is screwed on the front edge of the printed circuit board 101 so as to be grounded. The pattern 103 and the front plate 104 are electrically connected. The front panel 104 is connected to a ground wiring (not shown) outside the shelf.

FIG. 5 is a cross-sectional view of a main part of a part where a front plate 104 is attached to the front part of a printed circuit board 101 of two panels 100 mounted adjacently on a shelf.
This corresponds to a sectional view taken along the line EE ′. Arrow A indicates panel 100
Indicates the direction in which the plug-in is mounted on the shelf.

As shown in FIG. 5, the front plate 104 is made of a metal plate and has both side edges bent so that its cross-sectional shape becomes substantially U-shaped. Then, a part of the bent one side is extended (see FIG. 4) and fixed by screws 107 or the like so as to overlap the front edge of the printed circuit board 101. In the vicinity of the lead 106, in order to keep an interval so as not to come into contact with the lead 106, the front plate 104 moves the lead 106 toward the side facing the printed circuit board 101 (that is, in a direction to increase the width of the front of the front plate 104). It is bent to cover.

[0008]

FIG. 4 and FIG.
The main problems in the structure of the conventional panel shown in FIG.

The first problem is that the mounting space of the panel 100 in the width direction of the shelf increases, and the number of panels mounted on the shelf decreases.

[0010] This is because the metal front plate 104 is largely bent in the width direction of the shelf by the length of the lead 106 in order to avoid contact with the lead 106 of the electric component 105, so that one panel per panel is formed. This is because the mounting space increases accordingly.

The second problem is that the shelf 100
When all the panels 1 are inserted,
This is the point where electromagnetic waves are radiated to the outside of the shelf from the gap 00 (see the arrow B in FIG. 5), which causes noise.

This is because the gap between the panels 100 is a slit that is long in the vertical direction, so that electromagnetic waves are easily irradiated from the slit.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and effectively shields electromagnetic waves radiated to the outside of a shelf, which may cause an obstacle due to noise, to reduce the size of a device by high-density mounting. It is an object of the present invention to provide a panel structure that realizes compatibility between safety and safety.

[0014]

SUMMARY OF THE INVENTION The present invention relates to a panel which is mounted on a shelf in a parallel manner so as to be removably plugged in, wherein the front part is covered on a front part of a printed circuit board on which electric components are mounted. In a panel in which a front plate made of a metal material is attached and a ground pattern on the printed circuit board is connected to the front plate to shield electromagnetic waves, a portion of the side edge of the front plate that comes into contact with the lead of the electric component. A metal elastic body to which an insulating plate covering the notch is fixed is attached to the side edge of the front plate, and the insulating plate prevents contact with the lead, and the elastic body is adjacent to the lead. It is characterized by covering a gap with the panel and shielding electromagnetic waves radiated from the gap.

[0015]

The cutout is provided at the side edge of the front plate, so that the width of the front plate can be reduced without contacting the leads of the electric components.

Further, the insulating plate fixed to the elastic body can insulate the lead of the electric component from the elastic body, and the reaction force required when the elastic body shielding the gap between the panels elastically contacts the adjacent panel. It will be the reinforcement to obtain.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing an embodiment of a connection structure between a printed circuit board and a front plate of a panel according to the present invention, FIG. 2 is a sectional view of a main part showing the connection structure shown in FIG. 1, and FIG. And a shelf for plug-in mounting the panel.

As shown in FIG. 3, the panel 1 has a front plate 4 made of a metal material attached to a front part of a printed board 2 on which circuit components (not shown) are mounted, and covers the front part of the printed board 2. Has been established. A connector 3 for plug-in mounting on a back board 16 of the shelf 11 is provided at a rear portion of the printed circuit board 2. The panel 1 is connected to a guide rail 14 provided on a structural member 12 forming a bottom surface of the shelf 11.
And insert the connector 3 in the shelf 1
Connector 15 provided on one backboard 16
Plug-in connection. Insert all the panels 1 into the shelf 11
The locking lever 8 provided at the lower end is pushed down toward the center of the front panel 4, and further provided at the front edge of the structural member 12 above and below the screw 6 provided at the top and bottom of the front edge of the panel 1 and the shelf 11. The panel 1 is fixed to the shelf 11 by fastening the screw holes 13. When all the panels 1 are mounted on the shelf 11, the front plates 4 are arranged side by side to close the opening of the shelf 11.

Next, a connection structure between the printed circuit board 2 and the front plate 4 which is a feature of the present invention will be described with reference to FIGS.

As shown in FIG. 1, a ground pattern 7 is provided at the front edge of the printed circuit board 2. Panel 1
The front plate 4 made of a metal material covering the front portion has both side edges bent, and a part of one of the bent side edges 4a is extended (hereinafter, this extended portion is referred to as a "screwed portion 4b"). 2) Screw 207 (FIG. 2)
), The ground pattern 7 and the front plate 4 are electrically connected. Also, the front plate 4
Is cut off at the portion shown by the arrow C in the bent side edge portion 4a (see also the conventional example of FIG. 3 at the same time). Also,
A contact spring 5 in which the insulating plate 9 is fixed to the panel 1 with a double-sided adhesive is fixed to the side edge 4a by spot welding. The contact spring 5 is a plate-shaped spring made of a thin metal plate, for example, having a substantially U-shaped cross section and one side of the U-shaped being urged outward, as indicated by an arrow C on the side edge 4a. The insulating plate 9 is integrally molded so that the insulating plate 9 can be fitted and fixed in a portion (that is, a side of the U-shaped cross section where the bias is not applied) in contact with the cutout portion. In addition, as shown in FIG. 1, in the present embodiment, the contact spring 5 adjusts the elastic force by providing a slit so that the elastic force does not become too strong.

FIG. 2 is a sectional view of a main part of a portion where the front panel 4 of the two panels 1 inserted adjacent to the shelf 11 (see FIG. 3) is attached. Corresponds to the sectional view of FIG.

In the conventional example, the side edge portion 4a is bent so as to cover the lead 205 so as not to contact the lead 205 of the electric component 204.
Since the portion C of the side edge portion 4a that contacts the lead 205 is cut out, the side edge portion 4a is bent so as not to contact the printed circuit board 2 and the lead 205 is The front plate 4 does not contact the edge 4a.
Can be reduced as compared with the conventional example.

The contact spring 5 can reliably cover the gap between the adjacent panels 1 by utilizing the elastic force thereof, and can prevent electromagnetic waves from being radiated from the gap.

Furthermore, since the side edge 4a of the front plate 4 is partially cut away, when the contact spring 5 comes into contact with the adjacent panel 1, the insulating plate 9 fixed to the contact spring 5 becomes an electric component. Of the contact 205 and the contact spring 5
It becomes a reinforcing material for obtaining the elastic force of the contact spring 5.

[0025]

Since the plug-in mounting panel according to the present invention is configured as described above, the following effects can be obtained. (1) By providing the notch at the side edge of the front plate of the panel, it is not necessary to provide a clearance with the lead of the electric component, so that the width of the front plate can be reduced, and the panel can be mounted. Can be configured with minimal space,
Equipment can be downsized. (2) In order to securely cover the gap between the adjacent panels by using the elastic force of the contact spring and secure the connection with the grounding circuit,
Effectively shields electromagnetic waves generated from inside the device,
It is possible to prevent a failure due to generation of noise.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a connection structure between a printed circuit board and a front plate in a panel according to the present invention.

FIG. 2 is a sectional view of a main part of the connection structure shown in FIG.

FIG. 3 is a perspective view showing a panel and a shelf for plug-in mounting the panel.

FIG. 4 is a perspective view showing a connection structure between a printed circuit board and a front plate in a conventional panel.

FIG. 5 is a sectional view of a principal part of the connection structure shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Panel 2 Printed circuit board 4 Front plate 5 Contact spring 6 Screw 7 Ground pattern 8 Lever 9 Insulating plate 11 Shelf 12 Structural member 13 Screw hole 14 Guide rail 15 Connector 16 Backboard

Claims (3)

(57) [Claims] 1. A panel for mounting a plurality of plugs on a shelf so as to be removably pluggable in parallel, wherein a front plate made of a metal material for covering the front portion is attached to a front portion of a printed circuit board on which electric components are mounted. A panel that connects the ground pattern on the printed circuit board and the front plate to shield electromagnetic waves, wherein a portion of the side edge of the front plate that is in contact with the lead of the electric component is cut out; A metal elastic body to which an insulating plate covering the front panel is fixed is attached to the side edge of the front plate. The insulating plate prevents contact with the lead, and the elastic body covers a gap between adjacent panels and the gap. A panel that shields electromagnetic waves emitted from the panel. 2. The panel according to claim 1, wherein the elastic body is a metal leaf spring. 3. The panel according to claim 2, wherein the elastic body has a slit for adjusting an elastic force.