JPS622727Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is based on electric components such as variable channel selection resistors (hereinafter simply referred to as Also referred to as a resistor.)
This invention relates to an adjustment device for selectively adjusting the reception frequency of a tuning switch to which a resistor belongs by transmitting rotation perpendicularly to a rotary adjustment shaft.

Each push-button channel selection switch for TV and video has a variable resistor for tuning that adjusts the receiving frequency, and some of the channel selection switches are connected to major stations such as NHK, commercial broadcasting, etc. for each region. Adjust the resistor so that it can receive the same amount of energy and deliver it to the customer. Then, the resistors belonging to the remaining channel selection switches are set so that they do not receive any stations (so-called empty channels), and the customer installs appropriate equipment such as adding an antenna to receive UHF broadcasts in the area. For example, it is possible to receive by adjusting the resistor.

Conventionally, as shown in FIGS. 1 and 2, for example, in order to set the resistance value of the tuning variable resistor 3 used for tuning of color television receivers, it is necessary to attach it to the tuning variable resistor 3. He was rotating the driven gear 6 in the direction of the arrow with his fingertips. However, in order to rotate the above-mentioned 6 with the fingertips of the operator, a portion of the 6 is provided outside the cabinet front plate 1, and a considerably large space is required.

Furthermore, since the diameter of the driven gear 6 is large, the variable resistor section printed circuit board 2 for tuning and the printed circuit board 2' for the control volume section must be separated, making it extremely difficult to achieve compactness of various devices. . The present invention has a driven gear 6 as shown in the embodiment.
The diameter of the channel selection variable resistor 3 and various circuit components 2 can be mounted on a single printed circuit board 2.
1, 22, 23, etc., and it has many practical effects such as being useful for the compact design of various electrical devices.

The following description will be made with reference to the illustrated embodiments.

1 is the front plate of the cabinet, 2 is a wiring board fixed vertically opposite to the back side of the cabinet, and the terminal 3' of resistor 3 is inserted into the hole of the wiring board and fixed, and the wiring and electrical connection of the board are shown. Connect to.

As is well known, the resistor 3 has an adjustment piece 5 into which a threaded portion 4' of an adjustment shaft 4 is threaded, and by turning the end 4' of the adjustment shaft protruding from one end of the resistor, the direction of rotation can be adjusted. The adjusting piece 5 is prevented from rotating within the resistor and advances on the threaded portion 4' to select the frequency to be received by the tuning switch.

In this embodiment, the resistor is fixed vertically on the front surface of the board, with the end of the adjustment shaft 4 facing upward, but of course it may also be facing downward, and the resistor may be fixed horizontally or horizontally. It can also be diagonal.

At the end of the adjustment shaft 4, there is a cylindrical driven member 8 integrally equipped with a driven gear 6 and a guide cylinder portion 7 adjacent to the driven gear 6.
and fix it by knurling engagement etc. so that it rotates together with the adjustment shaft. The driven gear 8 is made of plastic, for example, and is preferably provided with a collar 7' at the end of the guide tube 7.

A drive operating tool 9 is attached to rotate the driven member 8 in forward and reverse directions to rotate the adjustment shaft 4 and move the adjustment piece 5 back and forth.

The drive operating tool has a holding piece 10 that fits the outer periphery of the guide tube 7 through an inlet that is slightly narrower than the outer diameter of the guide tube 7.
and a drive gear 11 having teeth that mesh with the teeth of the driven gear 6 at right angles when the holding piece 10 is fitted to the outer periphery of the guide tube, and a drive gear 11 rotatably supported by the holding piece 10 to rotate the driving gear 11. It is equipped with an operation shaft 12 for controlling the operation.

In this embodiment, the operating shaft 12 extends integrally from the center of the drive gear 11 and is adjacent to the drive gear with a small diameter portion 1.
2a and a knob 12b at the tip, and the holding piece 10 is pushed into the outer periphery of the guide cylinder 7 and fitted into it, so it has an Ω-shape or almost U-shape with a slightly narrow entrance at the lower end. A holding recess 10' and a hole 13 into which the driving gear 11 is inserted directly above the holding recess 10'.
It has a bearing cylinder part 14 cut out with a slot 14' into which the small diameter part 12a of the operating shaft can be inserted, just above this hole, and is also made of plastic. Therefore, when the small diameter portion 12a of the operating shaft is pushed into the bearing cylinder portion 14 through the slot 14', the operating shaft and the holding piece are assembled, and the drive gear 11 enters the hole 13 and the holding piece 1 is inserted.
Crosses 0.

Although only one resistor 3 is shown in Figure 1,
There are the same number of these as the channel selection switches, and they are adjacent to each other, and the front panel 1 of the cabinet has an opening 1 that faces the driven member 8 fixed to the adjustment shaft of each resistor and allows the holding piece of the drive operating tool and the drive gear to pass through. 1' is opened, and preferably, for aesthetic reasons, the part where the opening 1' is located is always hidden by a lid or door that can be opened and closed.

To receive the broadcast of a desired station, a resistor belonging to the channel selection switch is tuned to the frequency of the broadcast station. To do so, open the lid or door and open the opening 1'.
Then, insert the holding piece 10 of the drive operating tool and the driving gear 11 into the cabinet, and push the recess 10' of the holding piece into the outer periphery of the guide cylinder part 7 of the driven member.At the same time, insert the teeth of the driving gear 11 into the driven gear 6. Engage the teeth at right angles, and then twist the operating shaft 12 on the front side of the front plate.

As a result, the drive gear that rotates together with the shaft 12 rotates the driven member with the driven gear, the guide tube rotates while being held by the holding piece, and the driven gear transmits the adjustment shaft 4 at right angles, so the adjustment piece 5 The frequency is selected by moving forward and backward in the resistor 3. Then, when the adjustment piece reaches a position where the frequency of the desired station is received, the rotation of the operating shaft is stopped and the holding piece 10 is pulled out from the guide cylinder portion 7. The receiving frequency of the tuning switch can be adjusted by rotating the adjusting shaft of the resistor with a drive operating tool inserted from the front of the front plate.

In this embodiment, the driven gear 6 is a spur gear and the drive gear 11 is a pin gear, but both gears can be bevel gears, crown gears, or screw gears as long as they can transmit rotation at right angles. .

If the driven member is integrally provided with the threading cylinder part 15 as a pulley adjacent to the driven gear or the guide cylinder part, it can be used as a pulley of other equipment that needs to be driven in conjunction with the driven gear or the guide cylinder part. An endless thread belt can be stretched between them and driven synchronously.

Furthermore, in Fig. 1, the driven member is fixed to the adjustment shaft with the driven gear 6 at the top and the guide tube section 7 at the bottom, but the driven member is fitted onto the adjustment shaft with the guide tube section facing upward. When fixed, the holding plate was previously held in the guide cylinder part, and when the operating shaft 12 was rotated clockwise, for example, the adjusting piece 5 moved the threaded part of the adjusting shaft from one end to the other end, but conversely, when the operating shaft 12 was rotated clockwise, the adjusting piece 5 moved the screw part of the adjusting shaft from one end to the other. Move from one end to the other. Therefore, the manner in which the driven member is fitted onto the adjustment shaft can be selected depending on the direction in which the adjustment piece is mainly moved. Moreover, the holding piece 10 diametrically crosses the lower surface of the drive gear 11 that is inserted into the hole 13, and the drive gear protrudes the same amount from both sides of the holding piece 10, so that the holding piece 10 can be connected to the guide tube. 7, the drive gear meshes with the driven gear at right angles with the teeth protruding from either side of the holding piece, and the directionality is set in the direction in which the holding piece of the drive operating tool is fitted into the guide tube. There is no confusion when making adjustments.

Above, the present invention has been explained in connection with adjusting a tuning variable resistor fixed to a wiring board inside a housing of a TV or video cabinet, but the present invention is not limited to this, and the present invention is not limited to this, and the present invention is not limited to this. Adjustments can be made.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional variable resistor for channel selection, Fig. 2 is a vertical cross-sectional side view showing the installation state of the same, Fig. 3 is an overall layout diagram of an embodiment of the present invention, and Fig. 4 is FIG. 5 is an exploded perspective view of the drive operating tool. FIG. 5 is a partially sectional front view in the adjusted state. In the figure, 1 is the front plate of the cabinet that is the casing, 2 is the wiring board exemplified as a plate, and 3 is the front view of the drive operating tool. A variable resistor for tuning is shown as an example of an electric component, 4 is an adjustment shaft, 6 is a driven gear, 7 is a guide cylinder part, 8 is a driven member, 9 is a drive operating tool, 10 is its holding piece, 11 is also a drive gear , 12 similarly indicate the operating axis.

Claims (1)

[Scope of Claim for Utility Model Registration] A rotating device for a rotary adjustment shaft of an electrical component fixed to a plate provided in a housing, which has a driven gear and a guide cylinder integrally adjacent to each other for adjustment. A driven member fixed to the shaft so as to rotate together with the shaft, a holding piece that fits onto the outer periphery of the guide cylinder through an inlet that is slightly narrower than the outer diameter of the guide cylinder, and a holding piece that fits onto the outer periphery of the guide cylinder. a driving gear having teeth that mesh at right angles with the teeth of the driven gear when engaged, the driving gear being attached to one end and rotatably supported by a holding piece;
An adjustment device for an adjustment shaft, comprising a drive operation tool having an operation shaft for rotating a drive gear.