KR820002073Y1 - Tuning apparatus - Google Patents

Abstract

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Description

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1 is a cross-sectional view of the structure of a medium frequency transformer of the prior art.

2 is a cross-sectional view of the intermediate frequency transformer casting according to an embodiment of the present invention.

3 is an enlarged exploded perspective view illustrating an important part of the intermediate frequency transformer of FIG.

4 is an enlarged cross-sectional view taken along the line 4-4 of FIG.

5 is a cross-sectional view of an intermediate frequency transformer structure according to another embodiment of the present invention.

FIG. 6 is an enlarged exploded perspective view illustrating an important part of the intermediate frequency transformer of FIG. 5. FIG.

The present invention relates to a tuning device, and more particularly, to an improvement in the tuning capacitor and the terminal structure of an intermediate frequency transformer.

1 is a cross-sectional view for explaining the structure of a prior art intermediate frequency transformer for use in a tuning device, wherein the intermediate frequency transformer 10 has a synthetic resin base 12 having a groove 11 formed at the bottom thereof and the base. It consisted of a coil 13 attached over (12). In relation to the coil 13, the transformer 10 is provided with a cap core 15 and a drum core 14, the inductance being adjusted by adjusting the cap core.

In the groove 11 formed in the base 12, a tuning capacitor 16 in a circular columnar shape with a lead is accommodated. The plurality of round pin terminals 17 are compressed into the inner surface of the base 12. The lead wire 18 from the coil 13 and the lead wire 19 from the capacitor 16 are wound around the terminal 17 and fixed in a soldering process.

Known intermediate frequency transformers as described above have the following drawbacks.

First, if the compression insertion process of the terminal 17 on the inner surface of the base 12 is performed by an automatic machine, there is a drawback that the production cost is high if the number of products produced is not large.

Since the tuning capacitor 16 accommodated in the groove 11 is a large cylindrical tuning capacitor 16 with a lead, it is difficult to automate the installation.

Since the third tuning capacitor 16 is used in the groove 11 formed on the bottom surface of the base 12, the characteristics of the tuning capacitor 16 during the soldering process are lowered by adhesion of the flux.

Fourth, since the tuning condenser 16 itself is exposed, it is likely to be affected by atmospheric pressure and moisture.

Since the 5th terminal 17 and the base 12 are compressed and inserted, the connection therebetween is easy to short-circuit.

The structure of the present invention is briefly summarized as follows.

The tuning device according to the present invention includes a condenser chip, a base member having a coil, a groove for accommodating the condenser chip inside a base and installing the coil on one surface of the base, and the condenser chip protruding from the base member. And a plurality of external terminals electrically connected to the coil. The plurality of outer terminals have at least two or more outer terminals that take the form of a comb with a plurality of conductive combs, wherein a front end of two or more combs selected from the plurality of combs is inserted into the hole, and the hole Molded by a synthetic resin poured in, the ends of the comb to separate the comb from the other side. The two terminals of the condenser chip are directly connected to a portion corresponding to the comb front end of the two external terminals selected from at least two external terminals. Thus, one end of each end of the at least two external terminals and the condenser chip in the base structure pour the synthetic resin and fix it in the groove of the base member.

In a further preferred embodiment of the present invention in addition to the two comb teeth, a third comb of the comb-shaped member is inserted into the groove. The third comb is well connected to the condenser chip until the condenser chip between the two combs is flatly arranged and electrically connected to the back side and the position is fixed.

The fabrication of the tuning device according to the present invention is divided into a step different from the step of manufacturing the base structure.

The fabrication of the base structure includes preparing a comb-shaped conductive metal member having at least two comb teeth connected to one end of each end thereof, and electrically connecting the capacitor chip between the comb-shaped metal member between the other ends of the comb teeth. And inserting the metal member into the groove of the base member and fixing the metal member therein and accommodating the jar and the other end of the comb teeth in which the synthetic resin is poured into the groove of the base member fixed by the synthetic resin. It is a step.

A more preferred embodiment of the present invention is that the comb-shaped metal member has an additional comb and the metal member is used to temporarily fix the condenser chip by a fastener behind the at least two comb teeth and the metal member. Under the condenser chip is electrically connected to at least two combs, the additional combs are also used when the combs are used.

Therefore, the main object of the present invention is to provide a structure of a tuning device suitable for automating the operation of tying the inner terminal to the base member.

Another object of the present invention is to provide a tuning device suitable for mass production.

Another object of the present invention is to provide a structure of a tuning device that can protect a capacitor from any atmospheric influence.

Another object of the present invention is to provide a tuning device that does not change its characteristics from other tuning devices in the same place.

Another object of the present invention is to provide a structure of a tuning device that can reduce the number of devices when connected with high reliability in the electrical connection between the device and the internal terminal.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view of the structure of the intermediate frequency transformer 20 according to the embodiment of the present invention. The intermediate frequency transformer 20 is provided with a core 24 and a cap core 25 in relation to the coil 23. The cap core 25 is supported by the support block 40 so as to rotate relative to the synthetic resin base 22, and the inductance is adjusted according to the rotation of the cap core 25. That is, as the lower inner surface of the cap core 25 and the upper surface of the core 24 are connected to each other by one bearing, the area between the bearings and the distance therebetween is reduced as the cap core 25 is rotated. Change. The above-mentioned part is not a part forming a part of the present invention, so detailed description thereof will be omitted.

FIG. 3 is an enlarged exploded perspective view illustrating the main part of the intermediate frequency transformer of FIG. 2, showing the bottom surface of the synthetic resin base 22 in detail. Referring to the synthetic resin base 22 according to Figure 3 as follows. The bottom surface of the synthetic resin base 22 is formed with a H-shaped groove 21. After inserting the condenser and the external terminal into the groove 21, the synthetic resin is poured to fix the position of the condenser and the external terminal. Both outer sides of the base 22 are provided with grooves 30 for receiving the leads 28 from the coil 23. 3 also shows the structure related to the terminal in detail. The illustrated conductive metal plate member 31 is obtained by a compression process, which takes the form of a comb. Although only two comb teeth 32 are shown in the figure, the comb-shaped member 31 having a plurality of comb teeth 32 is actually used. An end portion between the two comb teeth 32 is connected to the connection portion 33 extending inside each other, the connection portion 33 is made of a suitable shape to suit the structure of the device. By using this pair of connections 33, the capacitor chip 26 having terminals on the opposite side thereof is seated by soldering as shown by reference numeral 34 arranged by a suitable jig (not shown). The metal plate member 31 configured as described above is accommodated in the groove 21 in the line direction also indicated by a dashed line and dashed line. The conductive metal special member 35 in the form of a comb also has several combs 36 like the above-described member 31, and bands are formed at each end of the combs 36. Since the member 35 thus formed is also inserted into the recess 21 in the direction indicated by the dashed line and dashed line, the synthetic resin is poured and fixed, so that the comb teeth never fall out unlike the conventional pin terminal 17 described above. . When the members 31 and 35 are each positioned at the positions A and B indicated by dashed lines, the comb teeth 32 and 36 are also separated to form flat terminals 27 (FIG. 2). . The lease wire 28 from the coil 23 is wound around the terminal 30 through the groove 30 and then fixed by a soldering process. The assembly comprising the base 22 and the rotatable cap core 25 is then tucked into the prepared case 38 to complete. In addition, the upper end face of the case 38 is provided with an opening 38a for equalizing with the upper end face of the cap core 25. The cap core 25 is suppressed downward by a spring tab 38b provided on the inner surface of the upper end wall of the case 38 to provide an appropriate rotational resistance.

4 is a cross-sectional view of the condenser chip 26 cut along the line 4-4 of FIG. 3, wherein the condenser chip has a multilayer structure. This type of condenser is excellent in its capacity compared to its small size.

The multilayer capacitor chip 26 of FIG. 4 is composed of alternating internal electrodes 26b, a plurality of ceramic dielectric layers 26a alternated with these electrodes, and external electrodes 26c. One alternating internal electrode 26b is connected to one external electrode 26c, and another internal electrode 26b is connected to the other external electrode 26c. A solder lump 34 for electrically connecting the condenser chip 26 to the comb teeth 32 is located between the pieces 33 which are connected to the external terminals 26c.

The coil 23 and the core 24 fixed to the base 22 through the support block 40 may be fixed on the base 22 or thereon after the base structure including the base 22 is installed. .

5 and 6 illustrate another embodiment of the present invention. In FIGS. 5 and 6, the same parts in FIGS. 2 and 3 have the same reference numerals as those in FIGS.

The conductive metal plate member 31 related to the terminal shown in FIG. 6 includes comb teeth 32a, 32b and 32c. Although illustrated in the figure as a comb-shaped member 31 having three combs, it actually has a plurality of combs including three combs 32a, 32b and 32c. Comb teeth 32a and 32b positioned opposite to each other among these three comb teeth 32a, 32b and 32c were connected to connecting portions 33a and 33b extending inwardly with each other. The connecting portions 33a and 33b are processed to have a suitable shape. Comb teeth 32a, 32b and 32c The intermediate comb 32c is processed to mechanically bite the condenser chip 26 using the reflection of the conductive metal plate member 31 provided as shown in FIG. Opposing teeth 32a, 32b of the two combs 32a, 32b, 32c are used as connector combs in which the capacitor chip 26 is directly connected by the solder lumps 34a, 34b. The intermediate comb 32c is used as a comb comb that presses the condenser chip 26 with the connector comb width.

In the actual process, the member 31 having the condenser chip 26 mechanically connected by the connecting portions 33a and 33b is soaked in a soldering vessel (not shown) and then connected by the connecting portions 33a and 33b. The electrodes are connected by solder lumps 34a and 34b. This process has the advantage of being easier to perform than the prevailing embodiment. This member 31 is inserted into the groove 21 in the direction indicated by the dashed line and dashed line. Another metal plate member 35 is not illustrated but takes the form of a comb with a plurality of combs 36 as in the case of the member 31. The comb teeth 36 are provided with notches 37a at their sharp ends. This member 35 is also guided in the direction indicated by the dashed line and dashed line and inserted into the groove 21.

The members 31 and 35 are inserted into the grooves 21 to pour and fix the synthetic resin. Since it is manufactured in the form of the comb teeth 32a, 32b, 32c, and 36 as mentioned above, the fault which falls out like the pin terminal 17 of the prior art never arises. The members 31 and 35 are placed at the positions indicated by dashed lines and dashed lines c and d. The comb teeth 32a, 32b, 32c and 36 are separated to form independent flat terminals 27 (FIG. 2). The lead wire 28 from the coil 23 is fixed by a soldering process wound around the terminal 27 via the groove 30. The terminal 27 corresponding to the comb 12c is electrically isolated from the rear side and is not connected to the condenser chip 26, and the terminal 27 is connected to the intermediate tap terminal by grinding the lead wire 28 from the coil 23 around them. Can be used. The arrangement of the terminals 27 on the bottom surface of the base 22 makes it easy to confirm the orientation of the first and second surfaces and makes the terminal positions asymmetric. The assembly comprising the cap core 25 of the base 22 is housed in a prepared case 38 and completed.

As shown in detail in FIG. 6, the comb teeth 32a, 32b, 32c, and 36 in this embodiment are bent in a V-shape so as to have a ridge extending in the axial direction. If the members 31 and 35 of the structure are made of a thin material, the resistance of warpage is increased.

Although the above-described embodiment will be described as being used in an intermediate frequency transformer, it is also used in a high frequency transformer, and generally the same concept is applied to a tuning device including an inductance and a capacitor.

The present invention has been described and illustrated in detail, and it is clearly understood that the likeness exists only in the way of illustration or example, and is not obtained by way of limitation, and the scope of the invention is defined by the claims that follow. Limited.

Claims (1)

A tuning device comprising a condenser chip, a coil, an insulating base member for accommodating the condenser chip in a groove and installing the coil on a surface, and a plurality of external terminal pins protruding from the base member and electrically connected to the condenser chip and the coil. To; Two or more selected combs 32 and 36 forming the comb-shaped conductive metals 31 and 35 are inserted into the grooves 21 of the insulating base member 22, and then the synthetic resin is poured into the grooves to fix the position. And comb-shaped conductive metal members 31 and 35 that cut the bottom ends of the comb to be separated from each other to provide two or more external load terminal pins; And a terminal of the condenser chip (26) directly connected to a connecting portion (33) of the free end of two or more comb teeth (32), thereby molding the free end and the condenser chip into a groove (21) with a synthetic resin.