JPS5942751Y2 - UHF tuner device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a UHF tuner device, in which a connection part of a stator part is formed by a main stator blade, an adjusted stator blade, and a connection part in a UHF tuner device that performs channel selection using a variable condenser. is attached to the support rod so that its sides are perpendicular to and parallel to the bottom surface of the tuner case, and the stator blades to be adjusted are integrally provided on the side perpendicular to the bottom surface of the tuner case in the connection part to perform minute capacity adjustments. The purpose is to make assembly work easier and more reliable.

In conventional UHF tuner devices, the stator portion of the variable capacitor has two types, one in which the end face of the main stator blade located on the rotor axis side is parallel to the bottom surface of the tuner case, and the other in which the end face is perpendicular to the bottom surface of the tuner case.

These are shown in the 11th ffiAB.

The stator part 1 is formed of a main stator blade 3 and an adjusted stator blade 4 provided via a connecting part 2.

The rotor portion 5 is formed of main rotor blades 7 and adjustment rotor blades 8 provided via a rotor shaft 6.

The stator section 1 and the inductor 9 are soldered to a support rod 10.

A trimmer plate 11 is attached to the tuner case along the inductor 9.

In Fig. 1A, the stator part is fixed only at one end by soldering to the support rod, so it is unstable against external shocks, and the stator blades to be adjusted are close to the bottom of the tuner case, so It is difficult to adjust the corresponding adjustment rotor blades.

Further, in FIG. 1B, since the stator blade to be adjusted is close to the cover (not shown) of the tuner case, the capacitance characteristics are likely to change due to stray capacitance generated between the stator blade and the cover.

The UHF tuner device according to the present invention is shown in Fig. 2A.

B11d is a view taken along line BB in FIG. 2A.

Components that are the same as those in FIG. 1 AI and B are designated by the same reference numerals.

FIG. 2 is a plan view of the AUUHF tuner with the case cover removed, and the oscillation stage 23 is formed by a frame-shaped case 21 having a bottom surface and a plurality of partition walls 22. Mixing stage 24. An antenna stage 25 is formed.

A variable capacitor consisting of a stator section 1 and a rotor section 5 is formed in each stage 23 to 25.

Here, in the mixing stage 24 and the antenna stage 25, the stator section 1 has three sides 2a, y2b, 2c as shown in the figure.
Two sides 2a, 2 of the connecting portion 2 formed in a trapezoidal mountain shape consisting of
As shown in FIG. Adjustable stator blades 4 are integrally formed by bending the connecting portion 2 and are spaced apart from the main stator blade 3 by a distance that is a dog larger than the distance between the opposing stator blades.

Next, the stator part 1 is attached to the tuner case 21 so that one side 2a of the trapezoidal mountain-shaped connecting part 2 is perpendicular to the bottom surface of the tuner case 21, and the other side 2c is parallel to the bottom surface. On one side 2b of the tuner case 21
and is attached to a support rod 10 that passes through the partition wall 22 and has an inductor 9 attached thereto.

The partition wall 22 has a U-shaped groove 26, and holes 27, 28 are provided in the side wall of the tuner case 21 parallel to the partition wall 22.

As shown in FIG. 2 B1, the end surface 3a of the main stator blade 3 located on the side of the rotor shaft 6 has an angle approximately halfway between the angle between the bottom surface and the side wall of the tuner case 21 (approximately 30
'-60°) is attached to the support rod 10.

At this time, the stator blade 4 to be adjusted is located on the side of the opening of the tuner case, but is relatively far from the opening.

Fig. 3 shows a rotor used in the UHF tuner device shown in Fig. 2 A and B, and the rotor section for the oscillation stage consists of three main rotor blades 7 and an adjustment rotor blade 8, each of which is made up of a set of three blades. It consists of a mixing stage rotor section consisting only of the main rotor blades 7 and an antenna stage rotor section.

This rotor is connected to the gear 2 of the rotor shaft 6 as shown in FIG. 2A.
9 into the hole 2 on the side wall of the tuner case 21.
7, insert the inside of the rotor shaft 6 into the U-shaped groove 26.
while inserting the screw into the hole 28, and
It is rotatably attached to the case 21 at 0.

At this time, the rotor shaft 6 is supported by the ball 31 near the hole 27.

Normally, the stator section 1 is attached after the rotor is attached.

However, in the present invention, the stator section 1 is attached at an angle of about 45 degrees, so if the attachment dimensions for each rotor blade 7, 8 are made accurate, the rotor can be attached after the stator section 1 is attached.

The UHF tuner device according to the present invention includes, in its oscillation stage, a stator section formed by a main stator blade and an adjusted stator blade, and a rotor formed by a main rotor blade and an adjustment rotor blade provided on a rotor shaft. Become,
The stator part has a connecting part formed in a trapezoidal mountain shape on three sides, and is attached to the support rod so that it has one side perpendicular to the bottom of the tuner case and another side parallel to the bottom surface of the tuner case, and the main stator blades are attached to the tuner case of the connecting part. The buttons are provided across the sides perpendicular to and parallel to the bottom surface, and the stator blades to be adjusted are separated from the main stator blades at the side perpendicular to the bottom surface of the tuner case at the connection part, and the connection part is bent and integrated. The end face of the main stator blade located on the rotor shaft side is supported at an angle (approximately 45°) approximately halfway between the angle formed by the bottom and side faces of the tuner case, and the stator blade to be adjusted is Since it is located on the side of the opening of the tuner case, it is easy to make fine adjustments after assembly of the stator section, rotor section, etc., and the case cover, main stator blades, and stator blades to be adjusted are located close to the case cover when they are installed. Since the stator blades can be installed at a position that is optically separated from the interval at which stray capacitance occurs, there is very little change in capacitance characteristics after adjustment. Since the stator can be easily attached using a jig with reference to the side perpendicular or parallel to the bottom surface of the tuner case provided on the stator, the stator section can be attached at an accurate position.

That is, for the tuner device shown in FIG. 1A, since the stator part is supported stably, more stable characteristics can be obtained against external shocks, and the stator blades to be adjusted are relatively close to the opening. It has the advantage of being easy to make corresponding adjustments, and compared to the tuner device shown in Fig. 1B,
Since the case cover and the stator blade to be adjusted are separated from each other to an extent that the generation of stray capacitance can be ignored, changes in the capacitance characteristics due to stray capacitance generated between the case cover and the stator blade to be adjusted are extremely small. After the stator part is installed in a predetermined position, the rotor formed from the opening side can be inserted and assembled, so the stator blades to be adjusted in the oscillation stage are provided by being bent integrally with the connecting part. Therefore, there are advantages such as the process of attaching the stator blade to be adjusted having a small mounting area can be omitted and assembly is very simple.

As described above, the UHF tuner device of the present invention solves the drawbacks of the UHF tuner devices shown in the respective conventional examples with an extremely simple configuration.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1A and 1B each show a conventional [F tuner device]. Figures 2 A and B are a plan view of the UHF tuner device according to the present invention with the case cover removed, and a view taken along the line B-B of this plan view, and Figure 3 is a diagram showing the UHF tuner device according to the present invention in the direction of arrows along the line B-B. FIG. 3 is a perspective view showing a rotor of the UHF tuner device. FIG. 4 is a perspective view showing the oscillation stage stator section of the UHF tuner device according to the present invention.

Claims (1)

[Scope of utility model registration request] A UHF tuner device that performs channel selection using a variable capacitor consisting of a stator part and a rotor part has a stator part formed by a plurality of main stator blades and a stator blade to be adjusted, and a rotor part provided on the rotor shaft. The stator part consists of a connecting part attached to the support rod so that the sides are perpendicular and parallel to the bottom surface of the tuner case, and the stator blade to be adjusted has sides of the connecting part perpendicular to the bottom surface of the tuner case. The stator blade extends upwardly and is bent integrally at a position separated from the main stator blade by a large distance, and the distance from the main stator blade is larger than the distance between the main stator blades. UHF characterized by setting
tuner device.