JPS6141312Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a tuning program code switching device that selectively switches the tuning frequency using a binary code of "0" or "1", and the program code once set in advance can be easily changed at any time. The purpose is to configure it so that it can be done.

When tuning to a desired tuning frequency by switching channels in the frequency band used by radio equipment such as transceivers and radio receivers, operate the channel selection switch for the variable frequency divider in the frequency phase synchronization synthesis circuit. It is common to change the frequency division number according to a binary code set in advance. Therefore, either a binary programming code can be patterned, for example, on the wafer of a rotary switch, or a diode matrix network can be inserted between the switching contacts of a conventional rotary switch and a variable frequency divider. It is configured to be able to output a binary code consisting of "0" or "1".

However, in the conventional program code setting method described above, assembly parts manufactured according to the planned channel selection code are installed at the manufacturing stage of the wireless device, so in order to change the program code once set, it is necessary to change the program code. The rotary switch must be replaced with one based on a modified code, or the matrix diode wiring must be changed, making the modification complicated and resulting in large economic losses.

In view of the above-mentioned conventional problems, the present invention has been developed to provide a flexible program that can be modified extremely easily by simply soldering the terminal conductor of the tuning switch to the printed circuit board, even if the tuning program code or number of bits is changed. The present invention aims to provide a highly versatile channel selection program code switching device. An embodiment of the present invention will be described below with reference to the drawings.

First, Figure 1 is an electrical connection diagram of the device of the present invention, and Figure 2 is an electrical connection diagram of the device of the present invention.
The figure is an external view of the rotary switch unit group and the printed circuit board, and FIG. 3 is a side sectional view for explaining the state in which the rotary unit is soldered onto the printed circuit board. In Figures 1 and 2, SU 1, SU 2,...
SU n is fixed contact C1, C2...Cn and movable contact K
1, K2...Kn, respectively, and terminal conductors T (T11...T1n,
T21...T2n, Tn1...Tnn) is a rotary switch unit for transmitting a channel selection code, which is coaxially pivoted on a rotating shaft (RS) so that each of the movable contacts operates in conjunction with each other, and a holding and fixing member. (FM) is installed inside the device body. CL is the conductive foil layer of the printed circuit board ( PB ), and SM is the part that is attached to the conductive foil layer of the terminal conductor using solder or other brazing material. As shown in Figure 2, the printed circuit board has through holes H (H1, H2...Hn) through which the terminal conductors led out from the individual rotary switch units are inserted, and the fixed contacts and movable contacts of each rotary switch unit. In order to electrically insulate between the movable terminal conductors P (P1, P
The insertion hole side of Pn) and the insertion side of the fixed terminal conductor T and the through holes through which the conductive terminal wire is inserted are separated by an insulating groove IS. but,
For example, when inserting a movable terminal conductor through a through hole in a printed circuit board and wiring the output of a program code in the form of a binary number of 1 or 1 for each bit to the input terminal of a variable frequency divider, The movable terminal conducting wire side of the conductive foil layer may be removed. When using this printed circuit board as an output terminal for a program code, a conductive foil layer is locally formed only around the through hole of the movable terminal conductor, and the movable terminal conductor and the input conductor of the variable frequency divider are connected to this. It can be soldered. A binary number of "0" or "1" for each bit is outputted from the movable terminal conductors P1, P2, .

In FIG. 1, the case where the terminal conductors led out from the fixed contacts of each rotary switch unit are simply inserted into the through holes of the printed circuit board is indicated by dotted lines.
As shown in FIG. 3, the signal of "1" among these terminal conductors, that is, the terminal conductors T11, T23, which should be conductive,...
This indicates that Tnn (indicated by a solid line) is brazed to the conductive foil layer. Therefore, the program code obtained by the rotary switch unit group in FIG. 1 is as follows: When the fixed contact is sequentially rotated from C1 to the movable contact, become that way. In this embodiment, a case has been described in which a flat printed circuit board is attached to a rectangular rotary switch, but an arcuate or cylindrical printed circuit board may also be installed around the outer periphery of a circular rotary switch.

As explained above, according to the present invention, the terminal conductors of the rotary switch unit, which is pivoted on the same axis and is switched in conjunction with each bit constituting the binary code, are fixed to the conductive foil layer of the printed circuit board by soldering or simply. Since the program code can be created by inserting the program code, even if the channel selection program code has been set, it is extremely easy to change the program code simply by changing the soldering part. Moreover, the number of bits can be increased or decreased freely.

[Brief explanation of the drawing]

Fig. 1 is an electrical connection diagram of the device of the present invention, Fig. 2 is an external view of the rotary switch unit and printed circuit board used in Fig. 1, and Fig. 3 is a connection between the fixed terminal conductor of the rotary switch unit and the printed circuit board conductive foil layer. FIG. 3 is a side sectional view of the soldered state. SU ( SU 1, SU 2... SU n): Rotary switch unit, PB : Printed circuit board, T (T11...
T1n, T21...T2n, Tn1...Tnn):
Fixed terminal conductor, P (P1, P2...Pn): Movable terminal conductor, H (H1, H2...Hn): Through hole,
IS: Insulating groove, FM: Holding and fixing member, RS: Rotating shaft rod, C1...Cn: Fixed contact, K1...Kn: Movable contact.

Claims (1)

[Scope of utility model registration request] In radio equipment that changes and selects the frequency division number of a variable frequency divider using a binary code in which the tuning frequency for channel selection is programmed in advance, the fixed contacts are rotated for each bit that makes up the binary code. A rotary switch unit is provided in which each of the movable contacts to be switched is linked and pivotally mounted on the same axis, and the fixed terminal has a through hole through which a terminal conductor led out from the fixed contact of each of the rotary switch units is inserted. A printed circuit board is provided with a conductive foil layer to which each of the conductive wires can be brazed, and only the terminal conductive wires to be electrically connected in the rotary switch unit are brazed onto the conductive foil layer, and the movable terminal conductive wires are connected to the printed circuit board. A channel selection program code switching device characterized in that a channel selection code is derived by using a channel selection code.