JPH03230600A - Front panel - Google Patents

Abstract

PURPOSE:To secure the shield of an interfering wave by tightening clamp holes formed in a shelf frame on the tip side of machine screws toward a shelf frame side by the machine screws and shielding the whole opening of the shelf frame by a front panel. CONSTITUTION:When a printed circuit board 2 is mounted to a shelf frame 1, the printed circuit board 2 is sequentially inserted with the guide of rails provided inside the shelf frame 1 and the fulcrum portion 13-1b of a front panel 13 is inserted into an engaging metal 15 with a Z-shaped section which is fixed to the shelf frame 1 on the upper portion of the opening of the shelf frame 1. Further, since the printed circuit board 2 presses a conductive rubber 13-3 on a curved portion against the lower portion of the opening, the printed circuit board 2 is mounted inside the shelf frame 1 by fastening machine screws 14 inserted in clamp holes 13-1c formed on the lower end side of the front panel 13. Thus, the front panel 13 surely shields the front side opening of the shelf frame 1 from an interfering wave and can remove the need of a tool for dismounting the printed circuit board.

Description

[Detailed Description of the Invention] [Summary] Regarding the front plate of a printed board widely used in the configuration of various electronic devices, the front plate of the shelf frame can be reliably shielded to prevent leakage of radio waves, and , with the aim of providing a new front plate that allows printed boards to be easily inserted and removed from the shelf frame, and which has a width equal to the mounting interval of printed boards and a length with both ends protruding by a certain amount from the width of the printed board. One end is formed as a fulcrum for locking to the shelf frame and for rotating the main body, and a hole for fastening is formed in the other edge, and a hole is formed between the fastening hole and the fulcrum. A vertically protruding bent part is disposed on the main body, and a pin rotatably connected to the printed board is provided upright on the tip edge of the bent part, and an elastic member is provided near the fastening hole of the main body. A conductive member having a conductive material is attached.

[Industrial application field]

The present invention relates to a front plate of a printed circuit board widely used in the construction of various electronic devices.

Recently, interference waves emitted by various electronic devices are causing a lot of damage to other devices, so there is a strong demand for measures to prevent leakage of interference waves from electronic devices at each LF/electronic device. The housing is equipped with various radio wave shielding structures to prevent leakage or intrusion of interference waves. However, when the door is opened for maintenance and inspection, interference waves may enter the shelf frame on which the printed boards are mounted inside the equipment, causing damage to many printed boards, and interference waves generated from the printed boards may be transmitted to other boards. By attaching a printed board, the front of the shelf frame is reliably shielded to prevent leakage of radio waves, and the new front board makes it easy to insert and remove printed boards from the shelf frame. is needed.

(Prior Art) As shown in FIG. 3, the front plate 3 which has been widely used in the past has retaining holes 2a drilled on both side edges of the printed board 2 on which the connector 2-1 is mounted. A rectangular hole 3a is formed by bending a metal thin plate long enough to be fixed between the two into an L shape so that the width on the front side is approximately equal to the mounting interval of the printed board 2, and exposing the coupling surface of the connector 2-1 on the front side. has been set up.

Then, when the connector 2-1 mounted on the printed board 2 is fitted into the hole 3a of the front plate 3 and connected, the connector 2-1 is connected to the connector 2-1 mounted on the printed board 2.
1 and the front surface of the front plate 3 are configured to be substantially on the same plane.

[Problems to be Solved by the Invention] The problems with the conventional front panel described above are as shown in FIG.
As shown in b), when the printed board 2 to which the front plate 3 is fixed is inserted and installed using the rails 1-1, which are arranged facing each other on both the upper and lower sides inside the shelf frame 1, as a guide, the printed board 2 is attached to the top and bottom of the front plate 3. A problem arises in that a gap occurs and radio waves leak to the outside of the shelf frame 1.

Also, as shown in FIG. 4(a), when removing the printed board 2 inserted into the shelf frame 1, the printed board 2
An extraction tool 4 is required due to the bonding force between the
-2 into the engagement hole 2a drilled in the printed board 2, and the rotation fulcrum part 4-1a is engaged with the cutout part 1a formed on the opening side of the shelf frame l. Since the printed board 2 is removed by rotating -1 in the direction of the arrow, a problem arises in that cutouts 1a must be formed above and below the opening side of the shelf frame 1.

In view of the above-mentioned problems, the present invention provides a new front plate that can reliably shield the front surface of a shelf frame to prevent leakage of radio waves, and also allows printed boards to be easily inserted and removed from the shelf frame. The purpose is to serve as a 1X child.

[Means to solve the problem]

As shown in FIGS. 1 and 2, the front plate 13 of the present invention has a main body having a width equal to the mounting interval of the printed board 2 and a length such that both ends protrude by a certain distance from the width of the printed board 2. 13-1 is molded, one end is used as a fulcrum part 13-1b for locking to the shelf frame 1 and rotation of the main body 13-1, and a tightening hole 13-1c is bored in the other end edge, A bent portion 13-1d protruding vertically is disposed between the fastening hole 13-1c and the fulcrum portion 13-1b, and the pin 13-1 is rotatably connected to the printed board 2. 2 is erected on the tip edge of the bent portion 13-1d, and an elastic conductive member 13-3 is attached near the fastening hole 13-1c of the main body 13-1.

[For production]

In the present invention, when mounting the printed board 2 inside the shelf frame 1, the front plate 1 is attached to the Z-shaped locking fitting 15 fixed to the upper opening of the shelf frame 1, as shown in FIG. 2(a).
When the fulcrum part 13-1b of the curved part 13-1e is inserted and pushed in further, the conductive member 13-3 of the curved part 13-1e is pressed against the lower part of the opening. By tightening the fastening hole 13-1c formed on the side toward the shelf frame 1 side, the entire opening of the shelf frame 1 is shielded by the front plate 13, thereby ensuring shielding of interference waves.

In addition, a mounting hole 13 for removing and removing the printed board 2 from the shelf frame 1 is provided.
- Remove the machine screw 14 tightened with 1c, and move it forward.
When the main body 13-1 of the face plate 13 is rotated in the direction of the arrow, its fulcrum portion 13-1b serves as a rotational fulcrum to pull out the printed board 2 in the removal direction, so the printed board 2 can be easily removed from the shelf frame l. This makes it possible to eliminate the need for a removal tool.

[Example] Figure 1 and ? below. The present invention will be described in detail with reference to Figure S2.

Fig. 1 is a perspective view showing the front plate according to this embodiment, and Fig. 2 shows the operation of this embodiment. In the figure, the same members as in Figs. 3 and 4 are given the same symbols. However, the other 13 is a front plate of the present invention disposed on the front side of the printed board 2.

As shown in FIG. 1, the front plate 13 is formed by molding a flat plate with a width that is approximately equal to the mounting interval of the printed board 2 and a length in which both ends protrude by a certain distance from the width of the printed board 2. A curved portion 13-1e protruding toward the front side and a fastening hole 13-1c to the shelf frame (not shown) are provided on the outside, and a fulcrum portion 13-1b serving as a fulcrum for rotation is provided at the other end,
In the middle thereof, in a direction parallel to and perpendicular to the longitudinal direction of the flat plate,
That is, a triangular plate-shaped bent portion 1 protrudes toward the printed board 2.
3-1 A main body 13-1 having d is formed. and,
A pin 13-2 is provided upright on the tip edge of the bent portion 13-1d to fit into a hole (not shown) in the printed board 2 and rotate freely relative to each other. That is, an elastic conductive member 9, such as conductive rubber 13-3, is attached to the printed board 2 side so as to protrude slightly.

In order to increase the bending strength of the main body 13-1,
It is also possible to bend both sides other than 3-1b to form a U-shaped cross section with a width equal to the mounting interval of the printed board 2.

A pin 13 erected on the bent portion 13-1d of this front plate 13
2 into a hole (not shown) in the printed board 2, the printed board 2 and the front plate 13 are rotatably connected to each other, and the connecting surface of the connector 2-1 of the printed board 2 and the front surface of the front plate 13 are connected. The sides are configured so that they are almost the same surface.

When mounting the printed board 2 on the shelf frame 1 as shown in FIG. When inserting the plates 2 one after another, the front plate 13
The fulcrum part 13-1b of the shelf frame 1 is inserted into the locking metal fitting 15 with a Z-shaped cross section attached to the upper part of the opening, and the conductive rubber 133 of the curved part 13-1e is pressed into contact with the lower part of the opening. As shown in Fig. 2(b), the printed board 2 is mounted inside the shelf frame 1 by inserting and tightening the machine screws 14 into the fastening holes 13-1c drilled at the lower end of the front plate 13. Ru.

Also, when removing the printed board 2 from the shelf frame l, as shown in FIG. 2(a), the fastening holes 13-
Loosen and remove the small screw 14 screwed in from 1c, and remove the front plate 1.
By rotating the main body 13-1 of No. 3 in the direction of the arrow,
The fulcrum part 13-1b serves as a pivot point in the direction of the arrow to pull out the printed board 2 in the removal direction, so the shelf frame l
The printed board 2 can be removed more easily.

As a result, the front side opening of the shelf frame 1 is shielded by the front plate 13, thereby reliably shielding interference waves, and at the same time, it is possible to eliminate the need for a extraction tool for removing the printed board.

Although the present invention has been described above based on the illustrated embodiment, the present invention is not limited to the embodiments described above. The body may be attached to the side of the main body 13-1,
It is also possible to configure the machine screw 14 inserted into the fastening hole 13-1c of the main body 13-1 so that it does not come off from the fastening hole 13-1c.

〔Effect of the invention〕

As is clear from the above description, the present invention has an extremely simple configuration, and has advantages such as being able to reliably shield the opening side of the shelf frame to prevent leakage of jamming waves, and eliminating the need for a tool to remove the printed circuit board. Therefore, it is possible to provide a front plate that can be expected to have significant economic and reliability effects.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a front panel according to an embodiment of the present invention, Fig. 2 is a diagram showing the operation of this embodiment, Fig. 3 is a perspective view of a conventional front panel, and Fig. 4 shows problems. FIG. In the figure, 1 is the shelf frame, 2 is the print if, and 2-1 is the connector 3.
is the front plate, 3-1 is the main body, 3-1a is the hole, 13-1b is the fulcrum 3-I
C is a fastening hole, 13-1d is a bent part, 13-1e is a curved part, 13-2 is a pin, 13-3 is a conductive gong J14
15 is a locking metal fitting.

Claims (1)

[Claims] A main body (13-1) having a width equal to the mounting interval of the printed board (2) and a length with both ends protruding by a certain amount from the width of the printed board (2) is formed, and one end is attached to the shelf frame ( 1) and serves as a fulcrum part (13-1b) for rotation of the main body (13-1), and a fastening hole (13-1b) is provided on the other end edge.
3-1c), and a bent part (13-1d) protruding in the vertical direction is arranged between the fastening hole (13-1c) and the fulcrum part (13-1b), and the above-mentioned A pin (13-2) rotatably connected to the printed board (2) is provided upright on the tip edge of the bent portion (13-1d), and is inserted into the fastening hole of the main body (13-1). A front plate characterized in that an elastic conductive member (13-3) is attached near (13-1c).