JPH039318Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a double-sided adjustable chip trimmer capacitor.

BACKGROUND ART Several electronic mechanical components such as variable capacitors and variable resistors that can be adjusted on both sides have been proposed. However, in the case of chip-type trimmer capacitors, there is currently no one that allows adjustment on both sides, as far as the present inventor knows.

Problems to be Solved by the Invention Therefore, the object of this invention is to provide a chip trimmer capacitor that is adjustable on both sides as described above.

Means for Solving the Problems In this invention, a center shaft extending vertically is arranged in an insulating case having an opening on the top surface, and a dielectric plate is inserted into the case with the center shaft passing through. a metal rotor is rotatably arranged thereon in a fixed manner, and the metal rotor is provided with a means for performing a rotation operation from outside the opening, and the lower surface of the dielectric plate and the lower surface of the metal rotor are provided with a means for rotating the metal rotor from the outside of the opening. A stator electrode and a rotor electrode are respectively formed on the metal rotor, so that the stator electrode and the rotor electrode face each other with the dielectric plate interposed therebetween.A spring is disposed on the upper surface of the metal rotor, and Therefore, the metal rotor is pressed into contact with the dielectric plate, and rotor side terminals and stator side terminals that are electrically connected to the rotor electrode and the stator electrode, respectively, are formed along the outer surface of the case, respectively. Improvements have been made to such chip trimmer capacitors to make them double-sided adjustable. To this end, it has the following features:

That is, the case is molded of resin with the rotor side terminals and the stator side terminals inserted therein, and also has an opening on the lower surface, and the center shaft is inserted into the lower surface opening within the lower surface opening of the case. A driver groove is formed in the lower end surface, and at least a portion of the center shaft in the axial direction has a non-circular cross-sectional portion, and the center shaft extends through the center shaft. A through hole with a non-circular cross section that can be engaged with the rotational movement of the center shaft is formed in the center of the metal rotor, and the rotor-side terminal is arranged concentrically with the lower opening of the case. The center shaft is formed so as to protrude inwardly from the inner circumferential surface of the lower opening while forming a through hole, and a head with a relatively large diameter is formed at the lower end of the center shaft, and the head is located on the rotor side. The spring and the center shaft are made of metal, the spring is held by caulking the upper end of the center shaft, and the spring is engaged with the periphery of the through hole of the terminal from below, and It is characterized in that electrical continuity from the terminals to the metal rotor is achieved via a central shaft and a spring.

Effects According to some of the characteristic means described above, it becomes possible to rotate the center shaft from the so-called lower surface side of the chip trimmer capacitor. When the center shaft is rotated, the non-circular cross-section portion of the center shaft and the non-circular cross-section portion of the metal rotor engage with each other, and the metal rotor is also rotated at the same time. Therefore, the metal rotor can be rotated not only from above but also from below, allowing adjustment from both sides.

Embodiment FIG. 1 shows a longitudinal sectional view of an embodiment of this invention, and FIG. 2 is a plan view thereof. In explaining the chip trimmer capacitor 1 shown in FIGS. 1 and 2, each component constituting the chip trimmer capacitor 1 will first be described with reference to FIGS. 3 to 5.

As shown in the exploded view in FIG. 3, five main parts are prepared. That is, the driver grooved spring 2, the metal rotor 3, the dielectric plate 4, the case 5, and the center shaft 6. Especially case 5
are shown individually in a plan view in FIG. 4 and in a longitudinal sectional view in FIG. 5.

The driver grooved spring 2 has both the function of a spring that presses the metal rotor 3 in the direction of the dielectric plate 4 and the function of a driver grooved member for applying rotational operating force to the metal rotor 3. The driver grooved spring 2 is made of a metal with spring properties, and is formed into the shape shown in the figure by punching and drawing. That is, the disk-shaped portion 7 has 4
Notches are formed at 90 degree intervals, and the driver groove 8
It is said that The central part of the disc-shaped part 7 is constricted so as to bulge downward, and a through hole 10 is formed in the bottom wall 9.
will be provided. Further, four spring pieces 11 are formed to extend radially outward and diagonally downward from the bottom wall 9 at intervals of 90 degrees. In addition, each spring piece 11
are made of material cut out for forming each of the driver grooves 8 described above.

The metal rotor 3 has a disk shape as a whole and is made of metal. The upper surface of the metal rotor 3 has a recess 12 having a substantially cross-shaped planar shape.
is formed. When the spring piece 11 of the driver grooved spring 2 described above fits into this recess 12, the metal rotor 3 rotates together with the driver grooved spring 2.
A through hole 13 having a substantially square cross section is formed in the center of the metal rotor 3 . Further, on the lower surface of the metal rotor 3, a rotor electrode 14 is formed with a stepped portion having a substantially semicircular planar shape.
Although not shown in FIG. 3, a balance step 15 is formed on the lower surface of the metal rotor 3 on the side where the rotor electrode 14 is not provided, as shown in FIG.

The dielectric plate 4 has a shape of a rectangle and a semicircle connected together, and is made of an appropriate dielectric material. A circular through hole 16 is provided in the center thereof. On the lower surface of the dielectric plate 4, a stator electrode 17 having a shape as shown by a broken line, for example, is formed.

The case 5 is made of an insulating and heat-resistant resin as a whole. The upper opening 18 of the case 5 is
It has almost the same shape as the dielectric plate 4, and a space is formed inside the case 5 that extends to the bottom surface while maintaining the planar shape of the top opening 18. When the dielectric plate 4 is placed within this space, rotation of the dielectric plate 4 is prevented. In the center of the bottom wall 19 of the case 5,
A lower opening 20 is formed.

A rotor side terminal 21 is provided on the bottom wall 19 of the case 5.
and the stator side terminals 22 are shown embedded. The rotor-side terminals 21 and the stator-side terminals 22 are inserted into a mold when the case 5 is molded, and are thereby integrated with the case 5. The rotor side terminal 21 has a through hole 23 concentric with the lower opening 20 of the case 5, and the peripheral edge of the through hole 23 projects inward from the inner peripheral surface of the lower opening 20. . Also,
The stator side terminals 22 are partially exposed on the upper surface of the bottom wall 19 inside the case 5 . The rotor side terminals 21 and the stator side terminals 22 protrude laterally during the manufacturing stage, but when the final product is made as shown in FIG. It is said to have extended to . For this purpose, recesses 24 and 25 are formed on the lower surface of the case 5.

The central shaft 6 is made of metal and has a generally rivet-like shape. A head 26 having a relatively large diameter is formed at the lower end of the center shaft 6, and a driver groove 27 is formed at the lower end surface of the head 26. The upper half of the shank portion of the center shaft 6 has a square section 28, and the lower half has a circular section 29. Square section section 28
fits into the through hole 13 at the center of the metal rotor 3. The through hole 13 engages with the square section 28 against movement of the center shaft 6 in the rotational direction. The circular cross-sectional portion 29 is located within the through hole 16 of the dielectric plate 4 and the lower opening 20 of the case 5 .

Next, the assembled state of the chip trimmer capacitor 1 shown in FIGS. 1 and 2 will be explained.

First, the center shaft 6 is inserted into the lower opening 20 of the case 5 from below the case 5 . and,
Along this central shaft 6, a dielectric plate 4, a metal rotor 3, and a driver grooved spring 2 are sequentially arranged in a case 5. Then, the upper end of the center shaft 6 is caulked, and appropriate pressure is applied by the spring pieces 11 between the parts arranged along the center shaft 6, so that the parts do not come off. At this stage, cover sheets 30 and 31 may be formed to respectively close the upper opening 18 and lower opening 20 of the case 5, as shown only in FIG. This cover sheet 3
0 and 31 are formed from a resin material that is easily broken when an operation for rotating the metal rotor 14 is performed. cover sheet 30,
31 provides the chip trimmer capacitor 1 with a sealed structure that prevents contamination from the outside. Finally, as mentioned before, the rotor side terminals 21 and the stator side terminals 22 are cut to appropriate lengths.
It is bent and placed into the recesses 24 and 25.

When assembled as described above, the head 26 of the center shaft 6 engages with the rotor-side terminal 21 while also establishing electrical continuity. The central shaft 6 is electrically connected to the metal rotor 3 either directly or indirectly via the driver grooved spring 2. Note that the lower end surface of the center shaft 6 is located within the lower opening 20 of the case 5 and does not protrude from the lower opening 20.

Further, the stator side terminals 22 are in contact with the stator electrodes 17 formed on the lower surface of the dielectric plate 4 inside the case 5, and electrical continuity is established here.

The chip trimmer capacitor 1 shown in FIGS. 1 and 2 has an adjustment hole 32 as shown in FIG.
It is mounted using solder 34 on a substrate 33 provided with. In FIG. 6, the chip trimmer capacitor 1 is mounted on each side of the upper and lower sides of the board 33, but in this way, the chip trimmer capacitor 1 can be mounted on either side of the board 33, and the direction of adjustment can also be changed. , is possible from either side. That is, the driver groove 2 of the center shaft 6 is inserted through the adjustment hole 32 of the substrate 33.
7, and in addition, access to the driver grooved spring 2 is also possible from above each chip trimmer capacitor 1.

Although this invention has been described above with reference to the illustrated embodiments, any configuration may be used to achieve electrical continuity from the stator side terminals to the stator electrodes. In addition, the driver grooved spring 2 simultaneously achieved the function of a spring that exerts spring properties on the metal rotor and the function of a driver grooved member for rotating the metal rotor. It may be divided into two parts that serve separately.

In addition, in order to transmit the rotation of the center shaft to the metal rotor, the cross-sectional shape given to the center shaft and the through hole in the center of the metal rotor was square, but even if it was any other rectangular shape, it could also be an ellipse. In short, it can be said that it is sufficient as long as it is non-circular. Furthermore, the entire center shaft may have a non-circular cross-section, instead of a portion having a non-circular cross-section formed in a portion of the center shaft in the axial direction. This is because even in this case, the center shaft can be rotatably held relative to the case and not engage with, for example, a dielectric plate.

Furthermore, the cover sheets 30, 31 are not essential.

Effects of the invention As described above, according to this invention, the central shaft is rotatably held while engaging with the metal rotor, and can be rotated from the bottom surface of the case, so that it is In addition to rotating the metal rotor from below, it is also possible to rotate the metal rotor from below, resulting in a chip trimmer capacitor that can be adjusted on both sides.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of this invention. Figure 2 shows the chip trimmer capacitor 1 in Figure 1.
FIG. FIG. 3 is an exploded perspective view showing the components constituting the chip trimmer capacitor 1. As shown in FIG. FIG. 4 is a plan view of the case 5, which is a part of the chip trimmer capacitor 1. FIG. 5 is a longitudinal sectional view of the case 5. FIG. 6 is a diagram showing an example of the mounting state of the chip trimmer capacitor 1. In the figure, 1 is a chip trimmer capacitor, 2
is a driver grooved spring, 3 is a metal rotor, 4 is a dielectric plate, 5 is a case, 6 is a center shaft, 8 is a driver groove, 11 is a spring piece, 13 is a through hole, 14 is a rotor electrode, 16 is a through hole , 17 is a stator electrode, 1
8 is an upper surface opening, 20 is a lower surface opening, 21 is a rotor side terminal, 22 is a stator side terminal, 23 is a through hole, 26
27 is a driver groove, 28 is a non-circular section (square section), and 29 is a circular section.

Claims (1)

[Claims for Utility Model Registration] (1) A center shaft extending vertically is disposed in an insulating case having an opening on the top surface, and a dielectric plate is disposed inside the case with the center shaft passing through the insulating case. A metal rotor is rotatably disposed thereon in a fixed manner, and the metal rotor is provided with a means for performing a rotation operation from outside the opening, and the lower surface of the dielectric plate and the lower surface of the metal roller are provided with a means for rotating the metal rotor from the outside of the opening. are formed with a stator electrode and a rotor electrode, respectively, so that the stator electrode and the rotor electrode are opposed to each other with the dielectric plate interposed therebetween, and a spring is disposed on the upper surface of the metal rotor. The metal rotor is brought into pressure contact with the dielectric plate, and rotor-side terminals and stator-side terminals that are electrically connected to the rotor electrode and the stator electrode, respectively, are formed along the outer surface of the case. In the trimmer capacitor, the case is molded from resin with the rotor side terminals and the stator side terminals inserted therein, and also has an opening on the lower surface, and the center shaft is arranged within the opening on the lower surface of the case. The center shaft has a lower end face located in a state not protruding from the lower opening, a driver groove is formed in the lower end face, and at least a part of the center shaft in the axial direction has a non-circular cross section, and the center shaft has a non-circular cross section. A through hole having a non-circular cross section that can be engaged with the movement of the center shaft in the rotational direction is formed in the center of the metal rotor, and the rotor side terminal is arranged in a hole concentric with the lower opening of the case. It is formed to protrude inwardly from the inner peripheral surface of the lower opening while forming a through hole, and a head with a relatively large diameter is formed at the lower end of the center shaft, and the head is connected to the rotor side terminal. The spring and the center shaft are made of metal, the spring is held by caulking the upper end of the center shaft, and the spring is held from below by caulking the upper end of the center shaft, and Double-sided adjustable chip trimmer capacitor, characterized in that electrical continuity to the metal rotor is achieved via a central shaft and a spring. (2) The spring is configured to rotate together with the metal rotor, and a driver grooved member serving as a means for rotating the metal rotor is integrally formed with the spring, Claim No. The double-sided adjustable chip trimmer capacitor described in item 1. (3) The non-circular cross-sectional portion of the central shaft is formed in a portion in the axial direction, and the other portion has a circular cross-section, and the circular cross-sectional portion penetrates the dielectric plate and is located within the lower opening. A double-sided adjustable chip trimmer capacitor according to claim 1 or 2 of the utility model registration claim. (4) The double-sided device according to any one of claims 1 to 3 of the utility model registration claim, wherein the non-circular cross-sectional portion of the center shaft and the through hole in the center of the metal rotor each have a substantially square cross-section. Adjustable chip trimmer capacitor.