JPS6192039A - Rf demodulating device and its production - Google Patents

Abstract

PURPOSE:To make a mother board part unnecessary to make a device small- sized and to reduce the space by attaching and holding an electronic tuner unit and an intermediate frequency demodulating unit with a metallic tool. CONSTITUTION:A metallic tool 10 is provided with holes 11 and 12 to which leg parts 8 for attachment of a casing of an electronic tuner unit 3 and that of an intermediate frequency demodulating unit 4 should be inserted, and holes 13 to which terminals of the tuner unit 3 should be inserted and connecting terminals 17 for soldering substrate terminal parts 15 of the demodulating unit 4 are arranged in the inside peripheral part of the metallic tool. In this constitution, individual leg parts and terminals of the tuner unit 3 and the demodulating unit 4 are inserted to insertion holes of the metallic tool 10 and are arranged along the connection part of connecting terminals 17, and they are soldered by a solder jet tank, and a joint part 18 between the metallic tool 10 and connecting terminals 17 is cut along a cutting line A, thereby connecting both units 3 and 4 with respect to circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an RF demodulator used in video tape recorders and television receiver shades, and a method for manufacturing the same.

Conventional configurations and their problems In the past, this type of RF demodulation device has been unitized, and with the spread of VTRs, miniaturization, and cost reduction, miniaturization, space saving, low cost, and cost. It is hoped that the

3 and 4 show conventional RF demodulators.

As shown in FIG. 3, the RF demodulator receives television high frequency signals from a channel selection circuit (1) and an antenna distributor (2) and selects a desired television channel according to instructions from the channel selection circuit (1). It is composed of an electronic tuner unit (3) that selects and converts it into an intermediate frequency output signal, and an intermediate frequency demodulation unit (4) that demodulates the output signal of the electronic tuner unit (3) into a video signal and an audio signal. As shown in Fig. 4, this RF demodulator includes an electronic tuner unit (3) and an intermediate frequency demodulator unit (4).
is attached to the motherboard portion of a printed circuit board (5) having a tuning circuit (1). This printed circuit board (
5) is used to wire electrical components (6) such as the tuning circuit (1), as well as the respective terminals (7) of the electronic tuner unit (3) and intermediate frequency demodulation unit (4), as well as the terminals (7) of both units (3) and (4). ) The RF demodulator was constructed by soldering the legs (8) of each case to the pattern (9) side of the printed circuit board (5).

However, the above configuration has the following problems.

■ Electronic tuner unit (
3) The installation space for the intermediate frequency demodulation unit (4) can be used to wire the electrical components (6).

Of course, the electrical parts (6) are connected to each unit (3) (4).
), which increases the size of the motherboard, increases the size of the entire RF demodulator, and increases cost.

■ The electronic tuner unit (3) and intermediate frequency demodulation unit (4) are connected to the wiring pattern (9) on the printed circuit board (5).
), the strength of the installation depends on the wiring pattern and its soldering strength, and metal fittings (not shown) are attached to the casings of both units (3) and (4). It is necessary to install it to increase the strength. The entire RF demodulator was held in place using the metal fittings used to attach it to the inside of the VTR.

OBJECTS OF THE INVENTION The present invention provides an RF demodulator that can reduce the cost of the motherboard part by reducing the size and eliminating the printed circuit board, and at the same time, can increase the strength of the device structure.
The purpose of this invention is to provide a method for efficiently manufacturing this.

Structure of the Invention The RF demodulator of the present invention includes an electronic tuner unit that receives a television high-frequency antenna signal, selects a desired television channel, and converts it into an intermediate frequency output signal, and converts the output signal of the electronic tuner unit into a video signal. A signal and an intermediate frequency demodulation unit for demodulating into an audio signal are contained in separate housings, and the electronic tuner unit and the intermediate frequency demodulation unit are arranged in parallel, and legs are formed in each housing, It is fixed to a metal fitting made of a flat metal plate, and the terminals of the electronic tuner unit and intermediate frequency demodulation unit are connected using connection terminals.

It is characterized in that it holds an electronic tuner unit and an intermediate frequency demodulation unit, and also connects the circuits.

The method for manufacturing an RF demodulator of the present invention also includes an electronic tuner unit that receives a television high-frequency antenna signal, selects a desired television channel, and converts it into an intermediate frequency output signal; When assembling the intermediate frequency demodulation unit that demodulates video signals and audio signals, the electronic tuner unit and the intermediate frequency demodulation unit are arranged in parallel, and the legs formed on each housing are attached to a metal plate on a flat plate. After soldering each terminal part of the electronic tuner unit and the intermediate frequency demodulation unit to the connection terminal integrally formed from the metal fitting, the continuous portion between the metal fitting and the connection terminal is cut. The present invention is characterized in that both units can be connected efficiently even though a substrate serving as a motherboard is omitted.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is an exploded perspective view of the RF demodulator of the present invention in the assembly process, and (10) is an electronic tuner unit (3).
This is a metal fitting to which the intermediate frequency demodulation unit (4) is attached and held. In this embodiment, the intermediate frequency demodulation unit (4) also includes a tuning circuit (1). Metal fittings (1
0) includes a hole (11) into which a mounting leg (8) formed on the housing of the electronic tuner unit (3) is inserted;
Holes (12) are formed in the housing of the intermediate frequency demodulation unit into which the mounting legs (8) are inserted, and
The inner periphery of the metal fitting has a hole (13) into which the terminal (7) of the electronic tuner unit (3) is inserted, and a terminal formed by pattern wiring on the board (14) of the intermediate frequency demodulation unit (4). A connecting terminal (17) is formed with a connecting part (16) bent in an L shape for soldering to the part (15).
They are arranged in parallel at intervals corresponding to the terminal arrangement of the electronic tuner unit (3) and intermediate frequency demodulation unit (4), respectively. In addition, by providing a continuation (18) on one side of this connection terminal (17) that connects to the metal fitting (lO),
The metal fitting (10) and the connection terminal (17) are integrally formed.

In the above configuration, the legs and terminals of the assembled and completed electronic tuner unit (3) and intermediate frequency demodulation unit (4) are attached to the insertion holes of the metal fitting (10), and the connection terminals (
17) and then solder it in a solder jet bath to connect both units (3) and (17) as shown in Figure 2.
After each leg and each terminal of 4) are soldered to the metal fitting, the continuation part (1) of the metal fitting (lO) and the connection terminal (17) shown in
By cutting 8) along cutting line A, both units (3) and (4) are connected in a circuit manner and completed. 'As described in the detailed description of the invention, the RF demodulation device of the present invention comprises an electronic tuner unit and an intermediate frequency demodulation unit.

Since both units are mounted and held using metal fittings without using the motherboard's printed circuit board, which was previously required, the space on the motherboard is reduced.

The RF demodulator can be made smaller and space-saving, and material costs can be reduced by replacing the printed circuit board with a metal fitting.

In addition, since the electronic tuner unit and intermediate frequency demodulation unit are mounted and held on the metal fittings, the mechanical strength of the entire RF demodulation device can be increased. When mounting on a machine, etc., there is no need to attach and hold both units to the housing on the set side via new metal fittings, which increases material costs and assembly man-hours.

Further, according to the manufacturing method of the present invention, after each terminal of both units is soldered and connected to a connection/terminal integrally formed on a mounting bracket for mounting and holding both units.

Since the connecting terminal is separated from the metal fitting, it can be manufactured efficiently with fewer man-hours.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the assembly process of the RF demodulator of the present invention, FIG. 2 is a cross-sectional view of the main parts when the assembly shown in FIG. 1 is completed, FIG. 3 is a circuit configuration diagram of a conventional RF demodulator, and FIG. The figure shows the conventional R
FIG. 3 is a front view of the F demodulator. (3)...Electronic tuner unit, (4)...Intermediate frequency demodulation unit, (7)...Terminal, (8)...
・Legs, (lO)...Metal fittings, (11) (12)...
Insertion hole, (15)...Terminal part, (17)...Connection terminal, (18)...Continued part Fig. 1 Fig. 3 Fig. 4

Claims (1)

[Claims] 1. An electronic tuner unit that receives a television high-frequency antenna signal, selects a desired television channel, and converts it into an intermediate frequency output signal, and converts the output signal of this electronic tuner unit into a video signal and an audio signal. The electronic tuner unit and the intermediate frequency demodulation unit for demodulating the signal are housed in separate housings, and the electronic tuner unit and the intermediate frequency demodulation unit are arranged in parallel, and the legs formed in each housing are arranged in a flat plate-like shape. An RF demodulator that is fixed to a metal fitting made of a metal plate and that connects the terminals of an electronic tuner unit and an intermediate frequency demodulator unit with connecting terminals. 2. An electronic tuner unit that receives a television high-frequency antenna signal, selects a desired television channel, and converts it into an intermediate frequency output signal, and an intermediate frequency unit that demodulates the output signal of this electronic tuner unit into a video signal and an audio signal. When assembling with the demodulation unit, the electronic tuner unit and the intermediate frequency demodulation unit are arranged in parallel and the legs formed in each housing are attached to the insertion holes of the metal fittings made of a flat metal plate, An RF demodulator that connects both units by soldering each terminal part of an electronic tuner unit and an intermediate frequency demodulating unit to a connecting terminal integrally formed from the metal fitting, and then cutting the continuous part between the metal fitting and the connecting terminal. manufacturing method.