JPS6138279Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a multi-band tuner device.
The circuit boards for AM and FM are separately provided, and the circuit boards for AM and FM are arranged so that the respective circuit components of each circuit board face each other in a staggered manner and face each other.
Manufactured by arranging FM circuit boards facing each other,
The object of the present invention is to provide a tuner device that is easy to assemble and can be standardized.

As a conventional multi-band tuner device, there is one shown in FIGS. 1A and 1B. In the figure, tuner device 1
is for AM and FM between the left side of the insulating terminal plate 2 and the side plate 11b of the frame 11, which will be described later.
The tuning coils 3, _{3 1} , 3 ₂ are installed horizontally, and one circuit board 4 is installed horizontally on the right side. The upper end of the right side of the terminal board 2 has a plurality of coil leads connected to each AM tuning coil ₃₁ .
An AM coil terminal 5 is provided, and a coil lead (not shown) of an FM tuning coil ₃₂ is directly protruded from the lower end.

The circuit board 4 has AM and FM circuit components 6, 6 ₁ , 6 ₂ commonly implanted on the top surface, and an AM circuit component on the right end.
A plurality of input/output terminals 7 for AM and FM are provided protrudingly, and a predetermined AM circuit component ₆₁ is soldered and connected to the AM coil terminal 5 via a lead wire 8 above the board 4. FM circuit components 6 on the bottom of the board 4
A predetermined print corresponding to ₂ is directly soldered and connected to the coil lead of the FM tuning coil ₃₂ . The circuit board 4 further has an upper frame 9 and a lower frame 10 made of metal plates covering its upper and lower surfaces.
are installed and fixed respectively.

The frame 11 in contact with the coils 3 ₁ and 3 ₂ is formed by bending side plate portions 11a, 11b, 11c from a metal plate, and opposite side plate portions 11a, 11b.
A slide plate 14, which supports the manual shaft 12 therebetween and has a plurality of cores 13 fixed thereto, is screwed into the threaded portion 12a of the manual shaft 12 as indicated by arrows A and B in the figure.
It is arranged so that it can be slid in any direction. The side plate portion 11c of the frame 11 is attached and fixed to the upper frame 9 by screws 15, and in this state, each core 13 penetrates the hole in the side plate portion 11b and is inserted into and out of the coils 3 ₁ and 3 ₂ for AM use. and forms a μ tuning section for FM.

Next, to explain the operation of the tuner device 1, in either case of AM tuning or FM tuning, by rotating the manual shaft 12, the slide plate 14 slides back and forth in the directions of arrows A and B as appropriate. The core 13 slides in and out of the AM or FM tuning coils 3 ₁ , 3 ₂ to vary the inductance value, and the AM or FM circuit component 6 of the substrate 4
₁ , 6, and ₂ to select a desired AM or FM station.

However, according to the above conventional example, for AM and
For the FM tuning coils 3 ₁ , 3 ₂ , only one circuit board 4 is provided, and the AM and FM circuit components 6 , _{6 1} , 6 ₂ are arranged in a mixed manner on the same plane. Therefore, the board 4 requires a large space in a plane, and the tuner device ₁ itself becomes long and _large . Even in the case of a defect, the entire board 4 needs to be replaced, resulting in poor manufacturing yields and long lead times.
₁ , the above lead wire 8 is inevitably required, making the configuration and assembly work troublesome, and in order to perform FM adjustment, the upper frame 9, the lower frame 10, the screws 15, and the lead wire 8 must be attached. This can only be done later, and even if the FM part is incorrectly adjusted, the _whole thing must be disassembled, making the work extremely difficult. If it touches 8, it will be necessary to adjust the FM again, and in mass production, the number of parts is large and the FM adjustment, which is difficult due to its characteristics, must be performed after the AM adjustment, resulting in a poor yield in the final process and the AM adjustment. There were various drawbacks such as wasted man-hours.

The present invention eliminates the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings.

2A and 2B are a plan view and a side view, respectively, of an embodiment of the multi-band tuner device according to the present invention, in which the same parts as in FIGS. 1A and 1B are given the same reference numerals. The explanation will be omitted. In the figure, a multi-band tuner device 21 has parts 3 ₁ , 3 ₂ , 11 to
14, and two AM and FM circuit boards 22 and 23 are mounted parallel to each other on the right side. The FM circuit board 23 is relatively short in size, has an FM circuit component ₆₂ implanted on its top surface, an FM input/output terminal 24 protruding from the right end, and an FM tuning coil at the lower right end of the terminal board 2. 3 ₂ , and the coil lead (not shown) of the tuning coil 3 ₂ is directly soldered to a predetermined print on the lower surface of the board 23 . Further, as shown in FIG. 3, this board 23 is fixed with a metal plate frame 25 covering its upper, lower, rear, and right sides.
Furthermore, a predetermined portion of the frame 25 is soldered to the side plate portion 11c of the frame 11 and is stably positioned. Incidentally, a predetermined circuit component ₆₂ such as an intermediate frequency coil is projected from the upper surface of the frame 25.

The AM circuit board 22 has a relatively long dimension and has a second
An AM circuit component ₆₁ is implanted on the lower surface of approximately the right half of the figure and FIG. 3, and an AM input/output terminal 26 is installed at the right end.
are provided on the upper right side of the terminal board 2 in correspondence with the AM tuning coils ₃₁ , and the plurality of AM coil terminals 5 of the terminal board 2 are directly soldered to a predetermined print on the top surface of the board 22. Ru. Further, a metal plate frame 27 is attached and fixed to the substrate 22 so as to cover three sides of the lower surface, and the side plate portion 27a of the frame 27 is attached and fixed to the side plate portion 11c of the frame 11 with screws 15 for stable positioning. . Furthermore, in FIGS. 2 and 3, a metal plate frame 28 covers the upper surface of the substrate 22 and its elastic locking portion 28a is attached to the frame 2.
7, and is detachably attached.

Thus, the boards 22 and 23 have their respective circuit components 6
₁ and 6 ₂ are directly attached to the terminal board 2 in a staggered manner and facing each other, and the space on the lower surface of the left half of the board 22 is filled with the circuit components 6 ₂ of the board 23. Therefore, no space is wasted. That is, since the circuit components 6 ₁ , 6 ₂ of each board 22 , 23 are arranged facing each other in a staggered manner, the distance between each board 22 , 23 is equal to the height of the circuit components 6 ₁ , 6 ₂ from the board. It would be better if they were spaced apart. Here, suppose each board 22,
If the height dimension from the substrate surface of the circuit components 6 ₁ , 6 ₂ provided in 23 is L, each circuit component 6 ₁ ,
If the circuit components 6 1 and 6 ₂ are not arranged in a staggered manner, the circuit components 6 ₁ and 6 ₂ will collide when facing each other.
The distance between the substrates 22 and 23 requires 2L. However, as in this embodiment, each circuit component 6
By arranging the substrates ₁ and 6 ₂ facing each other in a staggered manner, the distance between the substrates 22 and 23 can be reduced to L, and it is possible to reduce the space between the substrates 22 and 23 and to make the tuner device 21 thinner. Also, as shown in Figure 3, the FM protruding from the frame 25
The circuit component 6 ₂ is inserted into the notch 22a of the board 22, the hole 22b, and the holes 28d and 28c of the frame 28.
The cover 28 can be freely adjusted with the cover 28 attached.

Next, the operation of the tuner device 21 is exactly the same as in the conventional example.

According to the tuner device 21, for AM and
Since the AM and FM circuit components 6 ₁ and 6 ₂ are individually arranged on the FM circuit boards 22 and 23, respectively,
The substrates 22 and 23 are spaced apart from each other as described above, and the circuit components 6 ₁ and 6 ₂ can be shielded from each other by the frame 25, and the circuit components 6
₁ and 6 ₂ under these conditions in consideration of the electrical influence, the overall length of the substrates 22 and 23 can be shortened and the entire device 21 can be downsized. Also both boards 2
2, 6 ₁ , 23, 6 ₂ are manufactured independently, so
The number of parts for each board 22, 23 is reduced, which improves production yield and shortens lead time. Also, the print of the AM circuit board 22 can be directly soldered to the AM coil terminal 5, making it possible to The configuration and assembly work can be simplified without the need for lead wires as in the example above, and due to the opposing arrangement of the boards 22 and 23 and the shielding effect of the frame 25, for example, after the FM circuit board 23 is installed and adjusted, the AM circuit board 22
When installing and adjusting the FM circuit board 23, there is no need to readjust the FM circuit board 23, which further simplifies the work. Also both boards 2
2 and 23 are independent, and furthermore, the AM circuit board 22 is universal, and the AM circuit board 22 only needs to be assembled after the FM tuner is completed. can easily be made into multiple bands. In addition, in the tuner device 21, the reason why the FM circuit component ₆₂ is closer to the tuning coil ₃₂ than the AM circuit component ₆₁ is because the connecting lead between both components ₆₂ and ₃₂ is shortened. This minimizes the negative effects of high-frequency FM signals, further improving tuning performance.

As described above, the multi-band tuner device according to the present invention includes an insulating mounting plate, an AM tuner and an FM tuner provided on one side of the mounting plate, and AM and FM tuners provided on one side of the mounting plate.
A pair of AM and FM circuit boards are provided on the other side of the mounting plate in positions corresponding to the AM and FM tuners, respectively. The board has the above FM and
The AM and FM circuit boards are arranged facing each other so that the AM circuit parts are staggered and face each other, and the FM circuit parts are arranged close to the FM tuner side via a mounting plate. With this configuration, if each circuit board is placed facing each other with a distance approximately equal to the height from the board of the circuit component included in one circuit board, two circuit boards can be placed in this spaced apart area. Since all installed circuit components can be stored all at once, the multi-band tuner can be made thinner.
In addition, by making the AM and FM circuit boards independent, the circuit components can be arranged efficiently and the overall size can be made smaller. Also, the production yield can be improved and lead time can be shortened. Lead wires between the AM circuit components and the AM tuner are no longer required.
In addition, there is no need to adjust the mutual influence between AM and FM circuit components during assembly, which simplifies the configuration and assembly work.Also, since both boards can be assembled independently after completion, the tuner device itself can be standardized and It is extremely convenient and allows you to easily add multiple bands to the FM section.
In addition, the FM circuit components and FM tuner are placed close together and the length of the connecting lead between them is shortened.
It has features such as being able to suppress the negative effects of high frequency signals for FM and improve performance.

[Brief explanation of the drawing]

1A and B are a plan view and a side view of a conventional example of a multi-band tuner device, respectively, and FIGS. 2 A and B are a plan view and a side view of an embodiment of a multi-band tuner device according to the present invention, respectively. , FIG. 3 is a partially exploded perspective view of the above device. 1, 21...Multi-band tuner device, 2...
Terminal board, 3, 3 ₁ , 3 ₂ ... Tuning coil, 4...
Board, 5... AM coil terminal, 6... Circuit component, 6 ₁ ... AM circuit component, 6 ₂ ... FM circuit component, 7, 24, 26... Input/output terminal, 8...
Lead wires, 9, 10, 11, 25, 27, 28...
...Frame, 12...Manual shaft, 13...Core, 14...Slide plate, 22...AM circuit board, 23...FM circuit board.

Claims (1)

[Scope of utility model registration request] An insulating mounting plate and a
The AM and FM tuners and the AM and FM circuit components are individually installed on the other side of the mounting plate.
Consists of a pair of AM and FM circuit boards provided in positions corresponding to the AM and FM tuners,
The AM and FM circuit boards are arranged oppositely so that the FM and AM circuit components of both circuit boards are staggered and face each other, and the FM circuit components are mounted on the mounting plate. A multi-band tuner device configured to be disposed close to the FM tuner side via the FM tuner side.