JPH024156B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a receiving amplifier used in a public reception facility, which is equipped with a plurality of input connectors on one side of the case and receives various signals from each input cable connected to the input connectors. This article relates to electronic equipment used in the electronic equipment case, and more specifically, to the structure of the input section of the electronic equipment case.

In the structure of the input section of a conventional electronic equipment case, a plurality of input connectors are attached to the case in parallel, and a circuit board is attached to the case inside the case, and the input connectors and the input connectors are attached to the case inside the case. If the circuit board is electrically connected to the circuit board, and the circuit board is also electrically connected to a plurality of input measurement terminals provided separately from the input connectors in the case, the assembly There was an inconvenience in that mechanical assembly and electrical connections had to be made at the time with a great deal of effort. In addition, the above configuration has the problem that the electrical circuit connecting the input plug and the circuit board is located far away, resulting in deterioration of high frequency characteristics.

Therefore, the present invention has been made to eliminate the above-mentioned problems, and is an electronic device that allows mechanical assembly and electrical connection to be performed with less effort, and also provides good high-frequency characteristics of the finished product. It is intended to provide the structure of the input section of the equipment case.

The drawings showing the embodiments of the present application will be described below. In FIGS. 1 to 3 showing a receiving amplifier, reference numeral 1 denotes an electronic device case, which is formed into a box shape by bending a metal plate with good conductivity. Reference numeral 2 denotes an input connector, which is attached to the bottom wall plate 3 of the case 1. 4 is an output plug, which is attached to the bottom wall plate 3 mentioned above. Reference numeral 5 denotes an input measurement terminal, which is attached to a support piece 6 formed by bending a part of the bottom wall plate 3.
Next, in the well-known electronic circuit provided in the case 1, 7 is a branch circuit, 8 is an input filter circuit,
9 is an amplifier circuit, 10 is an output filter circuit, 11
indicate a mixing circuit, respectively. The branch circuit 7, output filter circuit 10, and mixing circuit 11 are not shown in FIG. 1 because they are provided in the inner part of the case 1.

Next, the structure of the portion of the case 1 where the input plug 2 and the input measurement terminal 5 are attached will be described in detail with reference to FIGS. 4 and 5.
Reference numerals 15, 15, . . . are through holes for attaching the input plugs 2, and they are arranged in a line at equal intervals as shown in FIG. Reference numeral 16 denotes a well-known waterproof cap fitting, which is also made of synthetic resin material. In this fixture 16, a through hole 17a for inserting an input plug is formed at the base 17. 18 is a well-known packing, 19 is an outer wall body, 20
are inner walls, each of which is formed in an annular shape, and a fitting groove 21 into which the tip of the waterproof cap is fitted is formed between them. Next, in the input connector 2, this connector is connected to the outer conductor 22 as is well known.
, an insulator 23 and a center conductor 24. The outer conductor 22 includes a flange portion 25 at its intermediate portion. As is well known, this collar portion 25 is formed into a hexagonal shape so that a tightening wrench can be hung thereon. Reference numeral 26 indicates a male screw for attachment, and 27 indicates a male screw for connector attachment. Reference numeral 28 indicates an insertion hole for the center conductor formed in the outer conductor 22 and the insulator 23. Reference numeral 29 denotes a connecting piece, which has a portion of the center conductor 24 that protrudes from the insulator 23.
Next, reference numeral 31 denotes a connecting body, which is formed by bending a metal plate with good conductivity, such as copper or steel, into the shape shown in the figure. In this connecting body 31,
Reference numeral 32 designates a plate-shaped main portion, in which a plurality of female threaded holes 33 are formed in a line, as shown in FIG. The mutual spacing between these female screw holes 33 is the same as the spacing between the through holes 15. 34 is the main body part 3
2, the connecting piece extends from both sides (the upper and lower sides in FIG. 5) of the portion where the female screw hole 33 is provided, and is composed of an extending portion 35 and a receiving portion 36. 37 indicates a female screw hole drilled in the receiving portion.
Next, 40 is a circuit board, which is constructed by pasting copper foil on both the front and back sides of an insulating board (generally called a printed circuit board).
It is arranged with a gap left between it and the bottom wall plate 3. The above-described branch circuit 7 is formed on this circuit board 40 by the copper foil and a plurality of circuit elements 41 connected thereto. As is clear from FIG. 3, the number of branch circuits 7 corresponds to the number of input connectors 2. In the circuit board 40, 42 is a connection part for connecting the center conductor of the input plug 2, and connects the connection piece 42a made of copper foil and the connection piece 29 of the center conductor 24. Through hole 42b for insertion
It has 43, 43 are screwed parts, and the distance between them is the connecting pieces 34 on both sides of the female threaded hole 33,
They are formed to correspond to the intervals of 34. This screw fixing part 43 has a ground circuit 44 made of the copper foil and a through hole 45 for inserting a set screw,
The mutual spacing between them is configured to be the same as the mutual spacing between the female screw holes 37, 37. Incidentally, the intervals between the plurality of connecting parts 42 on the circuit board 40 and the intervals between the screw fixing parts 43 provided corresponding to the respective connecting parts 42 are configured to be the same as the mutual interval between the through holes 15. be. Reference numeral 47 denotes a connection portion for connecting the center conductor of the measurement terminal 5, and is made of the copper foil described above. Next, in the attachment part of the input measurement terminal 5, a plurality of through holes 50 are formed in the support piece 6 at the same intervals as the through holes 15. Well-known plug seats are used as the input measurement terminals 5, and they have through holes 50.
A tightening nut 51 is used to circumferentially circumferentially cover the holder in a well-known manner. 52 indicates the center conductor at the measurement terminal 5.

Next, the assembly procedure of the parts shown in FIGS. 4 and 5 will be explained. First, the main body portion of the connecting body 31 is attached to the inner surface of the bottom wall plate 3 in such a state that the plurality of through holes 15 and the plurality of female threaded holes 33 overlap. On the other hand, the male screw 26 of the input connector 2 is inserted into the through hole 17a of the waterproof cap fixture 16, and the male screw 26 is inserted into the through hole 15 from the opposite side of the bottom wall plate 3 from the connecting body 31. ,
It is screwed into the female screw hole 33 of the connecting body 31. This operation is performed for each input connector 2. After that, the center conductor 2 is placed inside the outer conductor 22 of the input connector 2.
4 inserts the insulator 23 assembled in advance.
In addition, the input measurement terminal 5 is connected to each through hole 5 in the support piece 6.
0 by well-known means. In addition, the above insulator 23
The work of inserting the inside of the external conductor 22 and the work of attaching the input measurement terminal 5 are performed on the input connector 2, respectively.
This may be done prior to the work of attaching the outer conductor 22 to the bottom wall plate 3. Next, the circuit board 40 on which the circuit elements 41 have been attached in advance is opposed to the bottom wall plate 3. In this case, the screwed part 43
By positioning so that the through hole 45 in overlaps with the female screw hole 37 in the connecting piece 34,
Connection piece 29 on center conductor 24 of each input plug 2
is inserted into the through hole 42b, and
The center conductor 52 of the measurement terminal 5 is positioned corresponding to the connection portion 47, respectively. Once this is done, the set screw 46 is screwed into the female threaded hole 37 through the through hole 45 and tightened. As a result, the circuit board 40 is connected to the bottom wall plate 3 via the connecting body 31.
and the ground circuit 44
is connected to the external conductor 22 via the connecting piece 34. Thereafter, the connecting piece 29 and the connecting piece 42a are soldered to each other, and the center conductor 52 and the connecting portion 47 are soldered to each other, thereby completing the assembly.

In the above configuration, a large number of input cables are connected to each input connector 2 via connectors, as is well known. The television signals coming from those cables are transmitted to the circuit board 40 via the input jack 2, and are transmitted to the input filter circuit 8 shown in FIG. 3 via the branch circuit 7 provided on the circuit board 40, and further , amplifier circuit 9, output filter circuit 1
As is well known, the signal is output from the output terminal 4 through the mixing circuit 11 and the like to an output cable (main line) connected thereto via a connector. Also, the above input connector 2
A part of the signal entering the circuit board 40 also appears at the input measuring terminal 5 via the branch circuit 7 .
This signal is used to connect a measuring device to the measuring terminal 5 and measure the input signal level.

When a signal enters the input connector 2 from the input cable as described above and is transmitted to the circuit board 40,
The external conductor 22 of the input connector 2 and the ground circuit 44 of the circuit board 40 are connected electrically ( Good high frequency characteristics (good VSWR)
characteristics) are also transmitted to the circuit board 40. Further, the outer conductor 22 and the ground circuit 44 are connected to the connection piece 34.
However, as is clear from FIG. 4, since they are connected at the shortest distance (connected in terms of high frequency), the above-mentioned high frequency characteristics (VSWR characteristics) are even better.

Next, FIGS. 6 and 7 showing different embodiments of the connecting body will be described. The connecting body 31e includes a plate-shaped main body 32e and a plurality of U-shaped frames 60, respectively. The main body part 32e is formed with a concave fitting part 61 into which the base of the extension piece 35e of the frame 60 fits, while the frame 60 has a male thread for attaching the input connector. A through hole 62 is provided through which it can be inserted. By attaching this structure in the same manner as described above, the female threaded hole 37e of each connecting piece 34e is located at the same position as that of the connecting body of the previous embodiment. Therefore, the circuit board can be mounted easily as in the case described above.

It should be noted that the same reference numerals as those in the previous figure are appended with an alphanumeric letter "e" for parts that are functionally the same or equivalent to those in the previous figure, and redundant explanations are omitted.

As described above, in the present invention, a plurality of input connectors 2 are provided in parallel on one wall plate 3 of the electronic device case 1 which is capable of housing an electronic circuit inside, and the above-mentioned case A plurality of input measurement terminals 5 corresponding to the input connectors 2 are arranged at positions close to the input connectors in the case 1.
There is internally equipped a circuit board 40 that includes a plurality of circuits 7 that are capable of transmitting a part of the input signal from each of the input connectors 2 to the corresponding input measurement terminals. (a) There is an advantage that a plurality of input cables can be connected to a plurality of input connectors 2 in sequence and quickly in one direction. There is also the convenience of being able to easily check the signals coming into the plurality of input connectors 2 using the corresponding input measurement terminals 5, respectively.

Furthermore, in the present invention, in addition to the above configuration, the wall plate and the internal circuit board are juxtaposed with a gap between them, and a plate formed of a conductive material is provided between them. The plate-shaped main body of the connector is provided with a plurality of female threaded holes arranged in the longitudinal direction corresponding to the arrangement of the input plugs, and this allows input from outside the case. The male screw of the connector is inserted through the through hole of the case and screwed together, and connecting pieces made of conductive material are inserted from each side of the female screw hole in the plate-shaped main body of the connecting body toward the circuit board. The circuit board is provided with connecting portions for the center conductor of the input connector at dimensional intervals corresponding to the plurality of female screw holes in the plate-shaped main body, and these connecting portions are provided. are respectively connected to the input measurement terminals, and in addition, stopper portions are arranged at corresponding intervals to each of the connection pieces so that they can be screwed to each other, and the connection pieces of the husband connection pieces When the corresponding screw part on the circuit board side is screwed, the screw part on the circuit board is electrically connected to the external conductor of the input connector, and the plate-shaped main body part is electrically connected to the external conductor of the input connector. Since the center conductor of each input connector screwed into the female threaded hole in is configured so that it can be connected correspondingly to each connection part on the circuit board, the following effects are also obtained. (b) When combining the cases having the effects described in (a) above, the input connectors 2 are connected to the plate-shaped main body 32.
while screwing into each female screw hole 33 on the circuit board side with respect to each connection piece 34.
By screwing 3, each center conductor 24, 24... in a plurality of arrays of input connectors 2, 2...
It is convenient to correspond to each connection part 42, 42, . . . on the circuit board side, respectively. Thereby, each circuit of the circuit board 40 is connected to a plurality of input connectors 2,
2. Each center conductor 24 and outer conductor 2 in...
2, which has an epoch-making feature that not only facilitates mechanical assembly but also enables electrical connection at the same time.

(C) Furthermore, since the outer conductor 22 is connected to the circuit board 40 on both sides of the center conductor 24 at the shortest distance, the high frequency characteristics (VSWR characteristics) of the input connector 2 can be improved, and high frequency signals can be efficiently routed through the circuit. This has an effect that can be transmitted to the circuit provided on the substrate 40.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a front view of the receiving amplifier with the front cover removed;
Figure 2 is a bottom view of Figure 1, Figure 3 is a block circuit diagram, Figure 4 is a sectional view showing the relationship between the bottom wall plate, input connector, input measurement terminal, and circuit board, and Figure 5 is the same. FIG. 6 is an exploded perspective view showing a different embodiment of the connecting body, and FIG. 7 is a longitudinal cross-sectional view showing the same combination. 1...Electronic equipment case, 2...Input connector, 5...
...Input measurement terminal, 31...Connection body, 34...Connection piece, 33...Female screw hole, 40...Circuit board.

Claims (1)

[Claims] 1. One wall plate of an electronic equipment case that is designed to house an electronic circuit inside is equipped with a plurality of input connectors arranged in parallel, and a plurality of input connectors are installed in a position close to the input connector installation position in the case. is provided with a plurality of input measurement terminals corresponding to the input connectors, and inside the case there are a plurality of input measurement terminals that can transmit a part of the input signal from each of the input connectors to the corresponding input measurement terminals. In the structure of an input section of an electronic device case internally equipped with a circuit board having a circuit,
The above-mentioned wall board and the above-mentioned internal circuit board are juxtaposed with a gap between them, and a plate-shaped connecting body made of a conductive material is interposed between them. A plurality of female threaded holes are arranged in the longitudinal direction of the main body of the shape in correspondence with the arrangement of the input connectors, and the male screws of the input connectors are inserted from outside the case through the through holes of the case. They are screwed together, and connection pieces made of conductive material extend toward the circuit board from both sides of the female threaded hole in the plate-shaped main body of the connecting body, and on the circuit board, Connection portions of the center conductor of the input connector are provided at dimensional intervals corresponding to the plurality of female screw holes in the plate-shaped main body, and these connection portions are respectively connected to the input measurement terminals. In addition, screw fixing parts are arranged at corresponding intervals to each of the above connection pieces so that the screws can be fixed to each other, and corresponding screw fixation parts on the circuit board side are arranged for each of the above connection pieces. When the circuit board is screwed, the screwed part of the circuit board is electrically connected to the external conductor of the input connector, and each input connector screwed into the female threaded hole in the plate-shaped main body is connected to the external conductor of the input connector. 1. A structure of an input section of an electronic device case, characterized in that the center conductor of the plug is configured so that it can be connected to each connection section on the circuit board.