JPS6121875Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved preset tuning mechanism for a radio receiver.

Recently, in radio receivers, as shown in Fig. 1, a voltage variable element 2 is used in a tuning circuit 1, and variable resistors 3, 3, . A preset channel selection method is adopted in which a broadcasting station preset in the variable resistors 3, 3, . Therefore, this preset channel selection mechanism is the second
The configuration was as shown in the figure. That is, a tuning switch 4 and a variable resistor 3 are soldered and fixed to a printed circuit board 5, and operation buttons 6 and 7 are fixed and protruded from the front panel 8, respectively, and the tuning switching switch 4 can be operated. The resistance value of the variable resistor 3 is changed by pressing the button 6, and the resistance value of the variable resistor 3 is changed by rotating the operating button 7. The channel selection switch 4 is configured so that a plurality of them are linked, and the operation button 6 of one channel selection switch 4 is
This is a well-known interlocking switch mechanism in which when the channel selection switch 4 is locked in the operating state by the pressing operation, the channel selection switch 4, which was already in the locked state, is unlocked.

Therefore, when presetting, first select the channel selector switch 4 by pressing the operation button 6, and then select the variable resistor 3 by rotating the corresponding operation button 7.
to select the desired station. By adjusting each variable resistor in this manner, multiple stations can be preset. After the preset is completed, use the operation buttons 6, 6, etc. to switch the channel selection switch 4,
4... Just by switching the variable resistors 3, 3...
Tuning voltages set to .

In this configuration, as shown in Figure 3, two operation buttons are provided above and below for one preset station, which necessitates an increase in the height of the device, but due to the recent trend toward thinner devices, It was desired to be able to change the channel selection switch and adjust the variable resistor with a single operation button.

Therefore, the present invention was devised in view of this point.
Examples of the present invention will be described below with reference to the drawings. Furthermore, the second
Components that are the same as those in the figures are indicated by the same figure numbers, and improvements made by the present invention will be explained.

Reference numeral 9 designates an improved operation button according to the present invention, in which an elliptical fitting groove 10 is formed as shown in FIG. Although it is linked to the rotation operation of the button 9, it is configured not to be affected by the pressing operation. Further, a connecting member 13 fixed to the channel selection switch 4 is fitted and connected to the flange 12 of the operation button 9 so as to be operated by pressing the operation button 9 without being interlocked with the rotation operation of the operation button 9. The operating button 9 and the connecting rod 11 are fitted with a gap equal to the pressing stroke of the channel selection switch 4.

Therefore, when presetting, first press the operation button 9 to switch the channel selection switch 4, and then
By rotating the operation button 9, a desired tuning voltage can be preset by changing the resistance value of the variable resistor 3. At this time, the pressing operation of the operation button 9 is not transmitted to the variable resistor 3, and the rotation operation is not transmitted to the channel selection switch 4, so that they have no influence whatsoever. After completing the preset in this way,
A preset station can be selected by simply pressing the operation button 9 and switching the channel selection switch 4.

In this way, since the channel selection switch 4 and the variable resistor 3 can be operated with one operation button, the dial display section 13 can be provided lower than the conventional example shown in FIGS. 2 and 3, and the device can be made thinner. has been achieved.

As mentioned above, the preset tuning mechanism of the present invention is configured so that only the pressing operation of the operating button is transmitted to the tuning switch, while only the rotating operation of the operating button is transmitted to the variable resistor. It is possible to perform preset channel selection by operating one operation button, making the channel selection operation easier and making the device thinner, making it extremely practical.

[Brief explanation of the drawing]

Figure 1 is an electrical wiring diagram of the preset tuning system, Figure 2 is a side view showing the conventional preset tuning mechanism,
Fig. 3 is a front view, Fig. 4 is a side view showing the preset tuning mechanism of the present invention, Fig. 5 is a perspective view showing the main parts of Fig. 4, and Fig. 6 is a front view of the present invention. Oh, there it is. 3, 3... Variable resistor, 4, 4... Tuning selection switch, 8... Front panel, 9... Operation button, 13
... Connecting member, 14 ... Dial display section.

Claims (1)

[Scope of utility model registration request] A preset tuning mechanism that selects and supplies a preset tuning voltage to a tuning circuit includes a plurality of variable resistors to which tuning voltages are set, and a tuning switch that switches the tuning voltage output from the resistors; Operating both the variable resistor and the channel selection switch 1
a connecting rod fixed to the variable resistor is inserted and connected to a fitting groove formed in the operating button so as to be linked to the rotational operation of the operating button but not to the pressing operation; On the other hand, the connecting member fixed to the channel selection switch is connected to the flange formed on the operation button.
A preset channel selection mechanism characterized in that the preset channel selection mechanism is fitted and connected so that it is linked to the pressing operation of an operation button but not to the rotating operation.