JPH0350627Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Industrial application field The present invention relates to connectors for coaxial cables such as duplexers, distributors, branching switches, matching devices, etc., and specifically relates to printed circuit boards housed in a case. For,
The present invention relates to the structure of a plug connection part in a coaxial cable connector in which an external conductor connection tube is electrically connected via a connection piece protruding from its base end.

B. Prior art The external conductor connection tube and the printed circuit board were
As shown in the figure, the connection pieces 10 and the printed circuit board 16 are electrically connected via lead wires and jumper wires, and the external conductor connection tube 9 itself can be used to twist or swage the connection pieces 10, 10. With,
It was immovably fixed to the case body by being supported by a holder formed on the outer surface of the case. Another method of connection has been to arrange the external conductor connection tube so that the connection piece comes into contact with the printed circuit board, and then directly attach the connection piece to the printed circuit board.

C. Problems to be solved by the invention In the plug connection structure of conventional coaxial cable connectors, in the former case, a space is created between the printed circuit board and the connection piece to place the lead wire, and the case is It becomes larger and requires more soldering points, which not only increases costs but also complicates the soldering work. Also, the S/N in the connection wiring section
In addition to deterioration of high frequency characteristics such as a decrease in ratio, reliability was also poor as the external conductor connection tube was prone to wobbling. On the other hand, in the latter case, the stress applied to the external conductor connection tube is directly transmitted to the printed circuit board, placing a burden on the circuit board, and there is a risk that the case may be deformed due to the influence of heat during soldering.

D. Means for Solving the Problem The present invention provides a direct connection between the external conductor connection tube and the printed circuit board by arranging the connecting piece at the shortest distance to the printed circuit board, that is, in contact with the printed circuit board, and also connects the external conductor connection tube to the printed circuit board directly. The purpose is to provide a heat dissipation effect during the installation process and a reinforcing effect on the connection part.The structure consists of cutting a relief groove into the printed circuit board for introducing the connecting piece, and also forming a relief groove between the printed circuit board and the inner surface of the case. In this method, a partition plate is provided which is in perpendicular contact with the connection piece and is arranged at a predetermined distance from the inner surface of the case, and the connection piece, the partition plate, and the connection part of the printed circuit board are integrally joined. be.

E Function By integrally joining the inner wall of the case and the bulkhead plate placed at a predetermined distance, the strength of the connection is greatly improved, and the heat added during soldering is dissipated. , the effect of heat does not extend to the case. Furthermore, by inserting the connecting piece into the escape groove, the two intersect at right angles, eliminating unnecessary space and making the case more compact.

F. Example The drawing shows a duplexer which is an example of the coaxial cable connector according to the present invention. 1 is a case body, 2 is a lid body, and both are made of ABS resin or high-impact polystyrene resin. , the insertion pins 4, 4... formed of polypropylene resin, etc., protruding from the four corners of the lid body 2 are inserted into the insertion holes 3, 3... formed at the four corners of the case body 1 and fitted. It can be integrated by doing this. Case body 1
On one side wall, there is a plug mounting part 5 divided into a concave shape.
is formed in the plug mounting portion 5,
Plug 5 for inputting VHF/UHF mixed TV signals
A can be attached. 6 is the center conductor connection pin, and at its base end there is a stopper 6a for positioning during installation, and a stopper 6a located 0.2mm from the plate surface.
Projections 6b, 6b are formed to protrude and prevent from coming off. Also, inside the case body 1 are pedestals 2a, 2a, 2a that support a printed circuit board 16, which will be described later.
is formed, and the other side wall adjacent to the plug attachment part 5 is provided with an insertion hole 7 in the center thereof, through which the base end of the central conductor connection pin 6 is inserted.
A thick stepped portion 8 is formed around the insertion hole 7 on the inner wall of the case. Also, on both the left and right sides of the insertion hole 7, through holes 11, 11 are cut out, through which connection pieces 10, 10 protruding from the base end dam of the external conductor connection tube 9 are inserted. Protruding step portions 12, 12 are formed below the through holes 11, 11, respectively. And these connecting pieces 10, 10
and the through holes 11, 11 have different widths on the left and right sides,
This gives directionality to the attachment of the external conductor connection tube 9. Further, locking protrusions 10a, 10a are formed on the outer surfaces of the connecting pieces 10, 10, and the external conductor connecting tube 9 is formed by punching and bending a brass plate with a thickness of 0.8 mm. Reference numeral 13 denotes a partition plate formed by processing an iron plate with a thickness of 1 mm, and the partition plate 13 is formed by bending one side of the bottom plate 13a.
The rising plate portions 13b, 13b are approximately symmetrical on the left and right,
The rising plate portions 13b, 13 are erected with an interval g corresponding to the outer diameter G of the external conductor connection tube 9.
In b, cutout windows 14, 14 are cut out, and locking recesses 15, 15 corresponding to the connecting pieces 10, 10 are cut out, and the upper portions of the locking recesses 15, 15 are expanded inward. It is bent so that it comes out. Reference numeral 16 denotes a printed circuit board with a thickness of 1.6 mm in which a branching circuit made of predetermined printed wiring is built in. A feeder wire 17 for outputting UHF radio waves is connected to the printed circuit board 16, and a base of the center conductor connection pin 6 is connected to the printed circuit board 16. End, connection piece 1 of external conductor connection tube 9
Relief grooves 18, 18a, 18b, 18b, 1 corresponding to the connection protrusions of 0, 10 and the plug 5a, respectively.
A notch 8b is formed. This relief groove 1
8, 18a, 18a, 18b, 18b, 18b, connection pieces 10, 10 introduction grooves 18a, 1
The distance h between the outer conductor connecting tubes 9 is 9.2 mm, which is the same dimension as the inner diameter H of the outer conductor connecting tube 9. Furthermore, this relief groove 18
The distance h between a and 18a can also be set to about 9.0 mm.

To assemble a duplexer configured in this way,
First, the partition plate 13 is assembled with a thick stepped portion 8 and a protruding stepped portion 12 that are raised on the inner surface of the case, and a cylindrical body 3 that is provided to form a hollow portion as an insertion hole 3.
a, so that the bottom plate 13a is connected to the case body 1.
It is in close contact with the inner bottom surface of the
or the height of the protruding step portion 12). Next, the center conductor connection pin 6 is inserted (press-fitted) into the insertion hole 7, and the connection pieces 10, 10 of the center conductor connection tube 9 are penetrated into the through holes 11, 11, respectively.
The printed circuit board 16 has relief grooves 18, 18a,
18a, align the base end of the center conductor connection pin 6 with the connection piece 10 of the outer conductor connection tube 9, set it so that it remains on the pedestal 2a, and connect the center conductor connection pin 6 and the printed circuit board 16, Connection piece 1
0 and the vicinity of the locking recesses 15, 15 of the partition plate 13 in contact with the connection pieces 11, 11 thereof, and the printed circuit board 16
Predetermined connection parts (earth conductor part) 16a, 16a
are welded to each other with solder S. At the same time, the connection protrusions of the plug 5a are soldered directly to the printed circuit board 16.

When assembled in this manner, the base end of the center conductor connecting pin 6 is properly set in the insertion hole 7 by the stopper 6a, and is prevented from coming off by the protrusion 6b. Also, external conductor connection tube 9
, the connecting pieces 10, 10 are inserted into the locking recess 1 of the partition plate 13.
5, 15 at a right angle, the tips of the connecting pieces 10, 10 are first pushed and bent inward (Fig. 5b), and when they are pushed forward and the locking protrusion 10a passes over the locking recess 15, The connecting piece 10 is perpendicular to the partition wall plate 13, and the locking protrusions 10a are temporarily fixed in the locking recesses 15 thereof in a locked state. Therefore, when the printed circuit board 16 is set, the connecting pieces 10, 10 come into contact with the inner surfaces P, P of the escape grooves 18a, 18a, and the connecting pieces 10, 10 are slightly pushed outward, so that the outer conductor connecting tube 9 This eliminates wobbling and allows each member to be properly connected to each other, making positioning convenient for soldering.
Furthermore, the heat applied during soldering is absorbed by the rising piece 13b of the partition wall plate 13 arranged with a gap between it and the inner surface of the case, which acts as a heat dissipation plate, and the cutout window 14 promotes the cooling effect. Not affected by heat. Moreover, since the connecting piece 10 and the printed circuit board 16 are integrally connected to the partition plate 13, the mounting strength is excellent.

In the completed duplexer, connect the coaxial cable to the plug 5a as shown in Figure 5, and connect the feeder wire 17 for UHF radio wave output on the back side of the TV receiver.
It is used by connecting to the UHF terminal and inserting the VHF radio wave output plug into the VHF input terminal.

In the explanation of the above embodiments, a duplexer was used as an example, but the present invention is not limited to a duplexer as long as it is a connector for a coaxial cable in which the external conductor connection tube is connected to a printed circuit board via a connecting piece. , the means for fixing the partition plate, the shape of the case, etc. may be changed as appropriate within the range that can achieve the above-mentioned object of the present invention.

4. Effects According to the present invention, since the connection piece of the external conductor connection tube and the connection part of the printed circuit board are integrally connected to the partition plate that is securely fixed in the case, the connection piece of the external conductor connection tube Even if stress is applied to the structure, the stress is absorbed by the partition plate, the external conductor connection tube does not wobble, and the printed circuit board is not affected at all.
Furthermore, since the partition plate is provided floating from the inner side surface of the case body, it has an excellent heat dissipation effect during soldering, and the work can be done efficiently.

[Brief explanation of the drawing]

The drawings show an embodiment of the coaxial cable connector according to the present invention, and FIG. 1 is an exploded perspective view;
Figure 2 is an explanatory diagram of the external conductor connection tube and partition plate attached to the case body, Figure 3 is an explanatory diagram of the soldered connection part, and Figure 4 is an explanatory diagram showing the arrangement relationship between the connection piece and the printed circuit board. 5A to 5E are explanatory diagrams of the assembly procedure, FIG. 6 is an explanatory diagram of use, and FIG. 7 is an explanatory diagram showing a conventional connection part. 1... Case body, 2... Lid body, 2a... Pedestal, 3...
Insertion hole, 4... Insertion pin, 5... Plug mounting part, 5a
…Plug, 6…Center conductor connection pin, 6a…Stopper, 6b…Protrusion, 7…Insertion hole, 8…Step, 9…Outer conductor connection tube, 10…Connection piece, 10a…Locking projection, 11…Through hole , 12...Protrusion step portion, 13...Partition plate, 13a...Bottom plate, 13b...Rising portion, 14
. . . Cutout window, 15 .

Claims (1)

[Scope of utility model registration request] In a coaxial cable connector in which an external conductor connecting tube is electrically connected to a printed circuit board housed in a case via a connecting piece protruding from the base end, an escapement for introducing the connecting piece into the printed circuit board is used. A groove is cut and formed, and a partition plate is provided between the printed circuit board and the inner surface of the case, which contacts the connecting piece orthogonally and is disposed at a predetermined distance from the inner surface of the case, and connects the connecting piece and the partition wall. A coaxial cable connector characterized by integrally joining a board and a connecting part of a printed circuit board.