JPS6143316Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a channel selection display device for a television receiver, and is intended to provide a compact channel selection display device that is particularly effective when applied to a small television receiver. It is.

Recently, in order to downsize television receivers, the number of channel selection systems that use an electronic tuner and a variable resistor and select channels by changing the resistance value of the variable resistor has been increasing. However, how this channel selection display device is configured has a great influence on the miniaturization of television receivers. In the case of television receivers, as shown in Figure 3, the channel selection display device is usually placed on the front, along with the cathode ray tube, the power switch/variable resistor for adjusting the volume, etc.; In a receiver, the size reduction is greatly influenced by how small the width is.

The present invention particularly provides a compact channel selection display device with a reduced width. First, a conventional device using a variable resistor will be explained with reference to FIGS. 1 and 2.

Fig. 1 shows a variable resistor main body 1 equipped with a deceleration mechanism.A control knob 3 is fixed to a main shaft 2, and a display drum 5 is attached to an indicator shaft 4 coaxial with the main shaft 2.
is installed. In this case, the variable resistor body 1
Since the variable resistor main body 1 has a ball vernier type reduction mechanism, the length of the variable resistor main body 1 becomes long, and the length l _A of the variable resistor as a whole becomes long.

On the other hand, FIG. 2 shows an example in which a sliding type variable resistor 6 is used, whereas the rotary type shown in FIG. 1 is used. In this system, a spiral structure is cut into the main shaft 8 on which the operating knob 7 is attached, for moving the contact piece 9 of the variable resistor 6 and the display pointer 10 on the main shaft 8. That is, by rotating the operating knob 7, the display pointer 10 is moved by a range of K _S to display the reception channel.
However, in this case, although it looks compact at first glance, due to the configuration of the spiral sliding variable resistor, the length in the horizontal direction is 1 _B in order to move the pointer 10 within the range of _KS . , to make the display clear, if we take the corresponding dimensions as K _S
The disadvantage is that l _B becomes quite long due to the presence of C ₁ and C ₂ .

The present invention eliminates the above-mentioned conventional drawbacks. An example of this will be described below with reference to FIGS. 3 to 5. FIG. 3 shows a perspective view of a television receiver to which the present invention is applied. Further, FIGS. 4 and 5 show the configuration of the channel selection display device of the present invention.

In the figure, 11 is a variable resistor for channel selection, and rotation axis 1
2, and is fixed to a bracket 13 serving as a base with a washer 14 and a nut 15. 16 is an indicator drum with channel number 1 on the outer circumferential surface.
7 is printed, and an internal gear part 18 is formed on the inner circumferential surface, and a bearing groove 20 concentric with the center hole 19 is formed on the inner surface, and the variable resistor 11 is fitted into the center hole 19. Screw 21 on the rotating shaft 12 of
Fixed by Reference numeral 22 denotes a disc-shaped operating knob, which integrally has a gear part 23 on one side that meshes with the internal gear part 18 of the indicator drum 16;
The gear portion 23 has an integrally disposed end shaft 24 on one surface thereof that fits into the bearing groove 20 of the indicator drum 16, and a bearing hole 25 on the other surface of the operating knob 22. Reference numeral 26 denotes a holding plate, which integrally has a support shaft 27 that fits into the bearing hole 25 and rotatably supports the operating knob 22, and this holding plate 26 is attached to the bracket 13 with a plurality of screws 28. By fixing to a plurality of bosses 29, the indicator drum 16 and the operation knob 22
are each rotatably supported between the bracket 13 and the holding plate 26.

Therefore, the variable resistor 11, the bracket 1
3. The indicator drum 16, the operating knob 22 and the presser plate 26 are constructed as one unit part, and assembly is completed by fixing the bracket 13 to the cabinet 31 with screws 30. At this time, the cabinet 31 is provided with an operating knob 2 in order to make the operating knob 22 operable.
The indicator drum 16
The channel number 17 is on the part facing the outer circumferential surface of
A transparent plate 33 is provided so that the indicator drum 16 can be seen and to protect the indicator drum 16. Furthermore, a protrusion 34 is integrally provided on the inner surface of the cabinet 31 to prevent the presser plate 26 from accidentally opening due to collision with the front surface side of the presser plate 26. Here, 35 is a pointer provided on the cabinet 31 adjacent to the transparent plate 33, 36 is a knob for power on/off and for adjusting volume, and 37 is a cathode ray tube.

The completed state is shown in FIG. 4. By rotating the operating knob 22 with a finger, the operating knob 22 rotates around the support shaft 27, and the gear portion 23,
The internal gear portion 18 transmits the rotation to the indicator drum 16. As a result, the indicator drum 16 is decelerated by the speed reduction mechanism constituted by the internal gear part 18 and the gear part 23, and rotates in the same direction as the rotation direction of the operating knob 22. And guideline 35
The received channel number can be read by

As is clear from the above embodiments, according to the present invention, an indicator drum is directly connected to the rotating shaft of a variable resistor for channel selection, and an internal gear portion is provided on the inner peripheral surface of the indicator drum. By providing a gear part integrally with the operating knob which is rotatably supported on a shaft, and by meshing this gear part with the internal gear part to transmit the rotation of the operating knob at a reduced speed, it can be used as a channel selection display part. The width dimension _lx can be shortened, and the television set can also be made smaller.

In addition, by adopting a drum for the indicator, the distance the indicator can move can be extended, so channel numbers can be displayed large and with sufficient intervals, making it easy to perform channel selection operations, and displaying It also becomes easier to see. Furthermore, the device has a simple structure and is easy to assemble, and by making the device itself into a unit, it is possible to improve work efficiency.

Furthermore, since the operating knob gear is directly meshed with the internal gear of the indicator drum, the rotating direction of the operating knob and the rotating direction of the indicator drum can be matched, allowing for smooth tuning operations. . Additionally, it can withstand pressure on the knob for selecting channels, and rotates smoothly. Furthermore, compared to FIG. 1, an ordinary variable resistor can be used and resin molded products can be used for other parts, so the cost can be reduced.

[Brief explanation of the drawing]

1 and 2 are diagrams each showing a schematic configuration of a conventional channel selection display device, FIG. 3 is a perspective view of a television receiver to which the present invention is applied, and FIG. 4 is an embodiment of the present invention. 5th cross-sectional view of the channel selection display device in
The figure is an exploded perspective view of the device. 11... Variable resistor, 12... Rotating shaft, 13...
...Bracket, 16...Indicator drum, 1
7...Channel number, 18...Internal gear part, 20
... Bearing groove, 22 ... Operation knob, 23 ... Gear part, 24 ... Shaft, 25 ... Bearing hole, 26 ... Holding plate, 27 ... Support shaft, 29 ... Boss, 31 ... Cabinet, 32...Opening hole, 33...Transparent plate, 3
4... Protrusion, 35... Pointer.

Claims (1)

[Scope of utility model registration request] A variable resistor for channel selection having a rotating shaft, a channel letter provided on the outer circumferential surface, an internal gear portion provided on the inner circumferential surface, and a bearing groove concentric with the center hole provided on the inner surface, which fits into the center hole. an indicator drum that is directly fixed to the rotating shaft that fits together; an operating knob that has a gear part that directly meshes with the internal gear part on one side and a shaft that fits in the bearing groove; and an operating knob that has a bearing hole in the center of the other side; It has a support shaft that fits into the bearing hole and rotatably supports the operating knob, and is fixed to the bracket that fixes the variable resistor so that the indicator drum and the operating knob are sandwiched between them. A channel selection display device comprising a presser plate.