JPS5911074A - Rf modulator with encoder - Google Patents

Abstract

PURPOSE:To minimize the external measurements of an RF modulator with encoder, by providing a difference of levels between the 1st distributing board forming an encoder and the 2nd distributing board forming an RF modulator. CONSTITUTION:The 1st printed distributing board 10 is set at a comparatively higher part of a shielding case 50 with the pattern face turned up. While the 2nd printed distributing board 30 is set at a comparatively lower part of the case 50 with the pattern face turned down. An encoder 90 is mounted on the board 10, and an RF modulator is put on the board 30 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a video cheap recorder, a hiteo disc player, etc., which integrates a television audio leisure signal encoder (hereinafter simply referred to as an encoder) and an RF-T recorder. This invention relates to an RF modulator with an encoder H.

Prior art and its problems An RF modulator converts a composite video signal and an audio signal into an RF multiplied signal in order to provide it to the antenna of a television receiver.
This is a device that converts the audio signal of a program such as stereo or non-Japanese language into a so-called television multi-audio signal (hereinafter referred to as a single VC composite signal) depending on the content of the program, and all of these are well-known. .

The RF modulator used in the above-mentioned players uses an oscillator with a larger frequency drift (lower stability) than the standard of the broadcasting station in order to reduce its manufacturing cost. Therefore, it is necessary to set the modulation degree of the audio signal low (for example, 7% modulation!), and also modify the composite signal to a unique standard different from the broadcasting standard (for example, the main, sub, Each level ratio of the secondary channel is Q, 7!
0.8:0108), which caused a major problem in the design of the above-mentioned players. Therefore, recently, an RF modulator with an encoder that integrates an RF modulator and an encoder has been commercialized as a single component, and it has become possible to evaluate the overall performance.

FIG. 1 is a schematic perspective view showing a conventional RF modulator with an encoder with a portion cut away. This consists of mounting a circuit component group (2) that constitutes an RF modulator and a circuit component group (3) that constitutes an encoder on a single wiring board (1), and dividing each component group into a partition plate ( 4), with a part of the wiring board protruding from the opening of the shield case (5). Therefore, it cannot be separated into an RF modulator and an encoder.

From the viewpoint of supplying these types of parts to the players and the like, it is desirable to have a system that can supply RF modulators, encoders, or RF modulators with encoders as needed so as to cope with the diversification of models. It is useful to configure these parts so that they can be combined and separated as needed, contributing to cost reduction through saving design man-hours and mechanical parts. However, in the conventional example shown in FIG. 1, this effect can only be expected.

SUMMARY OF THE INVENTION In view of the above-mentioned points, it is an object of the invention to provide a novel and useful RF modulator with an encoder that can separate the RF modulator and encoder as necessary. at the same time,
・The external dimensions of this Engo 3F RF modulator should be made as small as possible.

A first wiring board on which circuit parts for forming a composite signal to constitute an encoder are mounted, and a second wiring board on which circuit parts for forming an RF multiplied signal to constitute an RF modulator are mounted.
The wiring board is arranged in a shield case at different levels, so that the first and second wiring boards can be separated as necessary.

Further, the shield case is provided with a partition plate that separates both wiring boards, and this partition plate has a notch that allows a part of the second wiring board to protrude from the first wiring board ll1lI, allowing electrical connection between the two wiring boards. The main points of each structure described in each claim VC include making it easier to use conductive bottles and making it possible to reduce the size by sharing a part of the area occupied by both wiring boards. It is something to do.

Embodiments of the Invention The present invention will be explained based on illustrated embodiments. FIG. 2 is a perspective view showing a part of the shield case cut away, and FIGS. 6, 4, and 5 are a plan view and a side view, respectively, showing the shield case with the upper cover and lower cover removed.

It is a bottom view. FIG. 6 is a circuit block diagram to which a VTRK is applied.

The RF modulator with encoder of the present invention basically includes a first wiring board I11, a second wiring board C3Ql, and a shield case. The first wiring board 11 (j is a printed wiring board, which is disposed in the shield case (50) with the pattern surface facing upward and at a relatively upper position of the shield case. 1 wiring board) to the shield case (50) and conductive NWy on the pattern surface.
I am trying to get N with solder (70) using
A plurality of claws may be disposed at different levels inside the shield case, and the base plate may be held between these claws. This first wiring board 11 () is for mounting the circuit parts group 011 that constitutes the encoder, and a part of it is mounted in a shield case (S
O) It is configured to be led out from the O opening (51), and this protrusion 04 is provided with a connector (131) for inputting various signals for forming a composite signal field.

The second wiring base (2) is also a printed wiring board, and the shield case (50) has the pattern surface facing toward the child side and is disposed at the lower position of the shield case (50).Therefore, both wiring boards +1fll (3fJl is shield case (5
0) with a step (71).

This second wiring board C30) is attached to the shield case (50) (the J force may be the same as that of the first wiring board. CHI), but in addition, it is equipped with ζ switches that can be operated from the outside to select the component group G2 that makes up the distributor and the RF modulator output prepared for two channels. In addition, this second wiring board (52) has a partition plate (52) having a V-lead effect to prevent interference between components on the board.
I also try to include the following.

this! 2 wiring base #i, one part of the side is both distribution base + +1)C
Partition plate (55) OJJ notch (
54) (See Figure 5) through the first wiring board f10)
IIIIIV'C is configured to protrude, and this protrusion (b) is disposed to face the first distribution board fllllJ with a space between them based on the step.

In this space, there are six conductive bottles (72), (75), and (7) for electrically connecting both wiring boards l11 (to).
4) and part I of the circuit component group Uυ to be arranged on the first wiring board (11), which contributes to the realization of miniaturization and effective use of space. Incidentally, some of the parts disposed on the base of the board and the conductors IJJ2 formed on each pattern surface are omitted from illustration to avoid cluttering the drawings. A shield disk (50λ) surrounds three sides of the first wiring board 1111, and has a horizontal cross-sectional shape (54), and a second wiring board 13.
The side wall (5
5) (56) and this side wall are connecting parts (57) (57
) partition plates (52) connected to each other via jQi.
(55), and a side wall (55) sealing each free end side of this side wall.
8), and δ et al., an upper lid (59) and a lower lid (60).
? We are prepared. The upper lid and the lower lid each include a first portion (59, A) (60) that mainly covers the first wiring board flfW.
A) and the second part (59B) that covers the second wiring board
(60B), and the image parts are connected with solder. Inside the second part (59B) (6QB), although not shown, there is a claw that circumscribes the partition if (53). The second part (59A) (, ', OA) etc. are separated so that the partition plate (54) can be held with the claws of the second part (59A).The side wall (58) has a terminal (58) for introducing the signal from the antenna. 80] and the RF modulator output output terminal (81)'a- for deriving the distributor output;
It also includes an opening (not shown) through which the operator (82) of the switch (33) projects to the outside. Roughly, side wall (5
5) is equipped with a terminal (86) for leading out the output of the distributor to the VTR.

As shown in FIG. 6, the encoder <qoy+i-y*riyu<) terminal (
T1) (T2) to receive the left signal (or main signal), from terminal (T5) (T4) to right signal (or rotation signal), from terminal (T6) to mode identification signal, and from terminal (T6) to power supply. (power) and outputs a composite signal from the first conductive bottle (72).The RF modulator (91'II; A composite video signal from the terminals (T7) (T8) is inputted through the pattern of the first wiring board 1101 and the second conductive vial (75), and the first conductive vial (02)
input the composite signal through the sixth conductive bin (
74) Input power through ¥ to form an RF multiplied signal, and transmit this RF multiplied signal to the switching circuit (92).

Switching circuit (92) RF doubler signal splitter (93)
) Select the output and connect either one to the VTR terminal (83)
Output to. This selection is made when playing a VTR (or when tit monitoring) to which VC power is applied to terminal (74).
The signal is transmitted to the terminal (81).

Figures 7(a) and 7(o) show a state in which the FtF modulator (P), which is used as an encoder, of the present invention is separated into an encoder (Q) and an RF modulator. is shown inverted.This separation is shown by the frame body (54) and side walls (55) (56) 1.L lower first part (59A) (60AL!: second Ji<min (5
9B) (60B), partition plate (5ro) and first wiring plate (1
Bins (72 x 73) (74) for each resultant line of 1 to VC 1st to 6th leads
This can be achieved by cutting. FIF modulator CP)
By installing N connectors (not shown) on the protruding portion 0 core of the second wiring board C, it has the same specifications as a normal RF modulator. In addition, the encoder (QDx! Partition 1f
By attaching a side wall (55)' corresponding to i (56) and short-circuiting the first and second conductive bottles (72) (73), the connector (131) connector (T7) ( T
8) The device is configured to output an RF multiplied signal.

Effects of the Invention Since the first wiring board and the second placement board are separate wiring boards arranged at different levels within the shield case, the encoder and RF modulator can be separated according to the required VC to meet various needs. .

In fact, according to this need, an encoder, an RF modulator, or an RF modulator with an encoder can be provided, and mechanical parts such as wiring boards and shielding materials can be shared, which is useful for reducing manufacturing costs. This is also
This means that the number of design man-hours can be greatly reduced compared to designing these six products individually, and seven production lines can be used for these three products. Even in the case of VC in the body R+Il, a great rationalization can be achieved. Furthermore, the structure of the first and second prank swords having different levels is advantageous in that the overall shape can be reduced in size by the area occupied by the opposing surfaces of both claw plates. Furthermore, not only the connectors between the boards but also some circuit components 2 can be arranged in the space between the opposing surfaces, which also contributes to miniaturization.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a conventional encoder-type FtF modulator. Figures 24 to 6 show an example of unexploded t9, Figure 2 is a perspective view with a part of the shield case cut away, and the third, fourth, and fifth causes are tIX and tIX of the shield case, respectively. FIG. 2 is a plan view, a side view, and a bottom view with the lower lid removed. FIG. 6 is a block diagram of what is applied to the VTR. Figure 7 (a) (b)
2A and 2B show respective perspective views of an RF modulator and an encoder for explaining the present invention in detail. Explanation of the main drawing numbers (11th... 1st wiring board, OQ... 2nd wiring 8th edition, (50)... V-hard case. Figure 1 Figure 2 Special iH Agency Director-General 1 Small work Showa 5th file: Patent Application No. 120201 2, Name of invention RF modulator with encoder, supplementary 11th person! Licensed 1 person f (- Toko no Mamoru [1 city, Keihan Honsho 2) Chome 18 name (+8
8) Sanyo Electric Co., Ltd. Representative Tsuki Ue Uo 4, Agent address: Mamoru [2-18-5 Higashihan Hondori, 1 City, Subject of amendment (1) “Detailed description of the invention” column of the specification, (2) Figures 5 and 6 of the drawings 6. Contents of the amendment (1) In the second line of page 8 of the specification, "divider" is corrected to "divider and switching circuit." (2) On page 8, line 10, "notch (circle)" is corrected to "notch + 611 J. +31" page 10, page 10, line 20 to page 11, line 5 are corrected as follows. [(Select the 9J output and output either one to the terminal I8υ to the television receiver. This selection is made at the terminal f74)
During reproduction (or monitoring) of a VTR to which power is applied, the signal is transmitted to the RF double signal terminal fllll). Further, one of the distributor outputs of the signal introduced from the antenna is output to the terminal (&3) for the tuner of the VTR. Figures 7(a) and 7(b) show the RF modulator with encoder of the present invention (c4 and RF modulator CP+).
(4) On page 11, line 18 of the same page, the RF multiplied signal is
I am corrected, ``A signal of anger.'' (5) Figure 5 of the drawing is corrected as indicated in red on the attached sheet. (6) Figure 6 of the drawing will be corrected as shown in the attached sheet. Above is the OL-N diagram VTR

Claims (1)

[Scope of claims] An RF modulator including an encoder and an encoder disposed at different levels in two shield cases and a second wiring board on which circuit components for inputting and forming RF signals are mounted. A partition plate is provided to separate both wiring boards, and the partition plate is provided with a notch through which a part of the second wiring board protrudes from the first wiring board 1. Claim No. (1)
RF module with encoder described in section. (3) The protruding portion faces @1 first wiring board #i with a space provided therebetween, and a conductive bottle for electrically connecting the surface wiring board is disposed between the opposing portion. An RF modulator with an encoder according to claim (2). (Patent J characterized in that 4j@Sibert r~s is provided with an opening from which a part of the @1 wiring board protrudes)
11. An RF modulator including an encoder example according to the range (1), (2), or (3) of the item 11. (5, 1) The protruding portion of the first wiring board is provided with a connector for supplying the audio signal, the control signal, the video signal, and the power source. R with encoder described in range item (4)
F modulator. 16) The encoder-equipped FiF according to claim (5), wherein both wiring boards are printed wiring boards, and the pattern surfaces of each wiring board are arranged in opposite directions. modulator. 7) The RF modulator with an encoder according to claim 3, wherein a circuit component on the first wiring board is arranged in the space.