JP2500689Y2 - Coaxial line connection structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a coaxial line connection structure, and particularly to a coaxial line for extracting a signal from an electric circuit incorporated in the casing to the outside of the casing via the coaxial line. Regarding connection structure.

[Conventional technology]

Conventionally, as a connection structure for this type of coaxial line, a lid 32 that constitutes a casing body 31 as shown in the sectional view of FIG.
The connector 35 for external connection is fixed to the. The center conductor line 38 to which the core wire of the coaxial plug 35 is connected is printed on the printed board 37. On the other hand, the outer conductor 41 and the center conductor line 38 form a coaxial line. This coaxial line is connected to a printed circuit board 47 on which electronic / electrical components are mounted via a connector 40, a coaxial cable 43, and a connector 44. Here, in order to prevent radio wave leakage from the gap between the plug 40 and the outer conductor 41, a shim
42 are provided. Furthermore, a shim 45 is provided in order to prevent radio wave leakage from the gap between the plug 44 and the shield case 46. Thus, the coaxial line was connected to the electric circuit of the printed board 47 from the coaxial connector 35 attached to the lid 32 of the casing body 31 via the center conductor line 38 and the coaxial cable 43.

[Problems to be solved by the device]

In the conventional coaxial line connection structure described above, since the coaxial plug 40 of the lid 32 and the plug 44 of the printed board 47 are connected by the coaxial cable 43, the lid 32 is fixed to the casing body 31. Has a drawback that the length of the coaxial cable 43 becomes unnecessarily long, a storage space for this coaxial cable becomes necessary, and the outer shape of the housing becomes large. Further lid 32
If it is removed carelessly when removing it from the main body, unnecessary force will be applied to the connection part between the connector and the coaxial cable, resulting in poor mating. 40 and 44 plugs with minimum length
If you want to connect the space between the lid 32 and the printed circuit board
It is necessary to fix the plate 34 carrying the shield case 46 accommodating 47 to the main body 31 in a fixed and integrated state, and there is a drawback that the structure of the fixing portion of the lid 32 and the plate 34 becomes complicated.

An object of the present invention is to provide a miniaturized coaxial line connection structure in which an inner coaxial line is simultaneously engaged by fitting a casing body and a lid, and a space for attaching and detaching the coaxial line is not required. is there.

[Means for solving the problem]

The coaxial line connection structure of the present invention is a coaxial line connection structure for connecting a connection part of a printed circuit board housed in a housing and a coaxial plug for external connection attached to a lid fitted in the housing. A first coaxial line that is provided inside the lid and that includes an outer conductor that is connected to the coaxial plug and that includes a first shim; and a central conductor line on a printed circuit board; and the print that is provided in the housing. A second coaxial line having a shield case which is connected to a connecting portion of the substrate and serves as an outer conductor including a second shim, and a second coaxial line having a center conductor supported by an insulator in the shield case. By fitting the lid, the first shim and the second shim are pressed into contact with each other to connect the outer conductors to each other, and the central conductor of the first coaxial line and the central conductor of the second coaxial line are connected to each other. Is fitted to connect the first coaxial line and the second coaxial line. [Example] Next, the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of an embodiment of the present invention. In the structure of the embodiment shown in FIG. 1, a coaxial connector 5 for external connection is fixed to a lid 2 of a casing body 1, and a printed board 7 having a central conductor line 8 printed on the inside of the lid 2 and an outer conductor 12 are provided. A coaxial line constituted by and is attached. The center conductor line 8 is connected to the center conductor of the coaxial connector 5 by soldering, and the other end is provided with a connector 10 to which a round bar-shaped center conductor having a spring property can be fitted. An insulator 11 is provided to prevent contact between the connector 10 and the outer conductor 12. This contact 10
A coaxial line is formed between the central conductor 15 having a tip shape that can be fitted to the connector 10, a lid 20 forming a part of the outer conductor, and a shield case 16 between the connector and the printed circuit board 17. There is. The insulators 18 and 19 are spacers that support the central conductor 15 and the outer conductor at predetermined intervals. The plate 4 to which the shield case 16 is fixed is fixed to the casing body 1. Now when the lid 2 is fitted into the main body 1, the connector 10
The center conductor 15 is engaged with the shim 13, and the shim 13 fixed to the outer conductor 12 and the shim 14 fixed to the shield case 16 come into contact with each other to form a complete outer conductor.

Thus, without using the coaxial connector and the coaxial cable as in the conventional example, the coaxial connector for external connection and the connecting portion of the internal printed circuit board are fitted with the casing body 1 and the lid 2. , At the same time electrically connected.

[Effect of device]

As described above, according to the present invention, the shield case for housing the printed circuit board is fixed to the main body of the casing, and the coaxial line connected to the connector for external connection and the coaxial line provided inside the shield case are connected. The following effects can be obtained by making the structure in which the coaxial line is formed by mating with the child.

(1) It is not necessary to integrate the plate and the lid, and the structure of the casing can be simplified.

(2) Since it is not necessary to use a coaxial cable as in the conventional example, the lid can be easily attached and detached, and a space for accommodating the coaxial cable is not required, so that the housing can be downsized.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional coaxial line connection structure. 1 …… Case body, 2,3,20 …… Lid, 4 …… Plate, 5 …… Coaxial plug, 7 …… Printed circuit board, 8 …… Center conductor line, 10 …… Connector, 11,18 , 19 …… insulator, 12 ……
Outer conductor, 13, 14 ...... Shim, 15 …… Central conductor, 16 …… Shield case, 17 …… Printed circuit board.

Claims (1)

(57) [Scope of utility model registration request] 1. A coaxial line connecting structure for connecting a connecting portion of a printed circuit board housed in a casing and a coaxial connector for external connection attached to a lid fitted in the casing, wherein: A first coaxial line that is provided inside and includes an outer conductor that is connected to the coaxial connector and that includes a first shim, and a central conductor line on a printed circuit board; and a connection on the printed circuit board that is provided in the housing. A second coaxial line having a shield case that is connected to a portion and serves as an outer conductor including a second shim, and a center conductor supported by an insulator in the shield case, and the lid is attached to the casing. By fitting, the first shim and the second shim are pressed into contact with each other to connect the outer conductors to each other, and the center conductor of the first coaxial line and the center conductor of the second coaxial line are fitted to each other. The above A connection structure for a coaxial line, wherein a first coaxial line and the second coaxial line are connected.