JPH0738509B2 - Radio wave shield structure of connector mounting part - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio wave shield structure for a connector mounting portion.

[0002]

2. Description of the Related Art A conventional example of a radio wave shield structure in a connector mounting portion is shown in FIG. In this conventional example, a printed board 7 on which a connector 1 is mounted is housed in a housing 3 whose front opening is closed by a front metal fitting 6. The connector 1 is configured by housing a contact portion (not shown) in a housing 8 which also serves as a signal ground terminal, and the housing 8 is connected to the signal ground pattern on the printed circuit board 7 and the signal terminal 9 is connected to the signal pattern.

Further, the terminals of the capacitor 2 are soldered to the front metal fitting 6 and the housing 8 of the connector 1, the signal ground SG and the frame ground FG are connected,
The radio wave shield of the connector mounting portion is achieved.

[0004]

However, in the above-mentioned conventional example, the capacitor 2 is connected to the housing 8 of the connector 1.
Since it is necessary to directly solder the front metal fitting 6, it is difficult to assemble, disassemble, and repair the device, and there are many variations in the work, and the quality is not stable.

The present invention has been made to solve the above drawbacks, and it is an object of the present invention to provide a radio wave shield structure of a connector mounting portion which has good mounting workability and stable shield performance. And

[0006]

According to the present invention, the above object is achieved by shorting the signal ground SG of the connector 1 to the housing 3 via the capacitor 2 as shown in FIG. 1 corresponding to the embodiment. A radio wave shield structure of a connector mounting portion for performing radio wave shielding of a mounting portion, wherein an auxiliary substrate 4 having patterns PT1 and PT2 connected to each other via a capacitor 2 is fixed to a housing 3 and the auxiliary substrate 4 A pressure contact spring 5 made of a conductive material, which is connected to one pattern PT1, is fixed on the upper side, the other pattern PT2 is connected to the housing 3, and the pressure contact spring 5 is pressed against the signal ground SG of the connector 1. This is achieved by providing a radio wave shield structure for the connector mounting portion.

[0007]

[Function] A pattern PT connected via the capacitor 2
1, the auxiliary substrate 4 provided with PT2 is fixed to the housing 3,
A conductive pressure contact spring 5 connected to one of the patterns PT1 is fixed to the auxiliary substrate 4. The pressure contact spring 5 is in pressure contact with the housing 8 of the connector 1 in the fixed state of the auxiliary substrate 4 to the housing 3, and is pressed to the signal ground SG of the connector 1.
And the other pattern PT2 of the auxiliary substrate 4 is connected to the housing 3, and the signal ground SG and the frame ground FG are short-circuited via the capacitor 2 mounted on the auxiliary substrate 4. It

As a result, the signal ground SG and the frame ground FG are short-circuited without attaching the capacitor 2 externally, and it becomes possible to take a radio wave shield measure with a simple operation.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 shows a mounted state of the connector 1, and FIG. 2 shows an exploded view thereof.

1 and 2, reference numeral 1 denotes a connector,
The housing 8 is formed by housing the contacts in a housing 8 made of a metal material. The housing 8 is provided with a pair of fixed blades 8a, 8a which also serve as signal ground terminals, and the fixed blades 8a are mounted on the printed board 7 by being joined to the ground pattern of the printed board 7. In the figure, reference numeral 9 indicates a signal terminal connected to the core wire of the cable 10 plugged in in the cable receiving portion 8b, which is connected to the signal pattern on the printed circuit board 7.

Reference numeral 6 denotes a front metal fitting made of a metal material which is mounted so as to close the front opening of the housing 3, and has an opening 6a for exposing the cable receiving portion 8b of the housing 8 to the outside. Further, the front metal fitting 6 has a section L
The V-shaped fixing member 11 is welded or screwed. The fixing metal fitting 11 is formed by bending a metal plate or the like, and is fixed to the front metal fitting 6 so as to be electrically connected. The fixing fittings 11 are fixed to the left and right with the connector 1 sandwiched therebetween.

A screw hole 11b is formed in the horizontal piece 11a of each fixing member 11, and the auxiliary board 4 is fixed by a screw 12 screwed into the screw hole 11b. As shown in FIG. 3, the auxiliary board 4 has three rectangular patterns PT1,
PT2 and PT2 are provided, and insertion holes 4a and 4a corresponding to the screw holes 11b are punched in the left and right pattern PT2 formation regions.

The pattern P in the center of the auxiliary substrate 4 is also provided.
A spring mounting hole 4b is bored in T1, and the pressure contact spring 5 is fixed thereto. The pressure contact spring 5 is made of, for example, phosphor bronze,
It is formed of a material having good conductivity and spring properties. As shown in FIG. 4, the pressure contact spring 5 includes a fixing portion 5a to the auxiliary substrate 4 and a contact portion 5b in which the tip of the fixing portion 5a is bent, and the auxiliary substrate 4 is fixed to the housing 3, that is, the fixing portion 5a. In the state of being fixed to the metal fitting 11, it is pressed into contact with the housing 8 of the connector 1 to establish conduction. The shape of the contact portion 5b may be a strip shape as shown in FIG. 4A or a fork shape as shown in FIG. 4B, but many contact points with the connector 1 are provided. In order to ensure the contact with each other, it is desirable to form it into a fork shape.

Further, the capacitor 2 is mounted between the central pattern PT1 of the auxiliary substrate 4 and the left and right patterns PT2, PT2. The capacitor 2 according to this embodiment is a chip capacitor 2, and terminals on both ends are soldered to the central and left and right patterns PT1 and PT2, respectively, so that the central pattern PT1 and the left and right patterns PT1 and PT2 are soldered.
2 and PT2 are connected. The capacity of capacitor 2 is
It is decided as appropriate in consideration of the band of radio waves to be taken.

In this embodiment, however, when the connector 1 is mounted and then the auxiliary board 4 is mounted via the fixing fitting 11, the signal ground SG of the connector 1 is connected to the front fitting via the capacitor 2 on the auxiliary board 4. 6, that is, short-circuited to the frame ground FG.

In the above embodiment, one pattern PT2, PT2 of the auxiliary substrate 4 is brought into contact with the front metal fitting 6 via the fixing metal fitting 11, but in addition to this, the pattern PT2, PT2, Fix the contact piece etc. to PT2,
It is also possible to directly contact the front fitting 6.

[0017]

As is apparent from the above description, according to the radio wave shield structure of the connector mounting portion according to the present invention, the signal ground and the frame ground are short-circuited only by mounting the auxiliary board, so that the capacitor is No special mounting work is required, and assembly and disassembly work can be simplified.

Further, since the capacitor is mounted on the auxiliary board, the connection state is stable and the shield performance can be stabilized.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is an exploded view of FIG.

FIG. 3 is a diagram showing an auxiliary substrate.

FIG. 4 is a diagram showing a pressure contact spring.

FIG. 5 is a diagram showing a conventional example.

[Explanation of symbols]

 1 Connector 2 Capacitor 3 Housing 4 Auxiliary Substrate 5 Pressure Contact Spring SG Signal Ground PT1, PT2 Pattern

Claims (1)

[Claims] 1. A radio wave shield structure for a connector mounting portion for shorting a signal ground (SG) of a connector (1) to a housing (3) via a capacitor (2) to shield the connector mounting portion from radio waves. , The pattern (P
The auxiliary substrate (4) on which T1, PT2) is formed is fixed to the housing (3), and a pressure contact spring (1) made of a conductive material and connected to one pattern (PT1) is formed on the auxiliary substrate (4). 5)
And the other pattern (PT2) is connected to the housing (3), and the pressure contact spring (5) is connected to the signal ground of the connector (1).
A radio wave shield structure for the connector mounting part that is pressed into contact with (SG).