JPS642406Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a differential variable resistor, a so-called buck crush volume.

(Prior Art) Conventionally, a so-called buckle volume has been used as a volume in which two volumes are linked in a certain differential relationship, such as a horizontal position adjustment volume or a trigger level adjustment volume of an oscilloscope. ing. As shown in FIGS. 1A and 1B, this type of volume consists of a main volume 12 that is directly driven by an inner shaft 11 to which a knob 10 is attached, and an outer shaft 14 that is disposed outside the inner shaft 11. The main volume 12 is provided with a slave volume which is operated by the drive of the main volume 12 as long as the protrusion 15 projecting on the inner shaft 11 moves within the range of the notch 16 provided on the outer shaft 14. On the other hand, when the inner shaft is rotated beyond the range of the notch 16, the main volume 12 and the slave volume 14 operate in conjunction with each other.

However, the above-mentioned backlash volume has a complicated structure and is a relatively special component, so it has to be expensive, which increases the cost of electronic devices that use it. It was hot.

(Objective of the invention) An object of the invention is to eliminate the drawbacks of the conventional ones described above and to provide an extremely low-cost differential variable resistor.

(Structure of the invention) The differential variable resistor according to the invention is configured such that only when one variable resistor is operated over a certain range, the other variable resistor is operated in conjunction with the other variable resistor. This differential variable resistor uses two coaxial, non-interlocking volumes, and only the outer shaft of the volume is attached to the chassis, and the rotation of only the inner shaft produces a difference. It is configured to perform dynamically variable operation, and has the same function as a so-called backlash volume.

(Example) An example of the differential variable resistor according to the present invention will be described based on FIG. 2.

In the figure, reference numeral 1 denotes a non-interlocking double coaxial type volume, which includes a main volume 3 that operates according to the rotation of the inner shaft 2, a subordinate volume 5 that operates according to the relative positional relationship between the outer shaft 4, and the above-mentioned. The rotary knob 6 is provided on the inner shaft 2. 7 is a chassis to which the above-mentioned outer shaft 4 is fixed.
Note that the rotational torque of the main volume 3 is set to be smaller than the rotational torque of the slave volume 5.

To explain an example of the operation in the above configuration, first, when the rotation knob 6 is rotated, the slider (not shown) in the main volume 3 operates while both the volumes 3 and 5 are stopped. When rotated to a certain angle, the slider in the main volume 3 stops, and the rotational force is transmitted to the slave volume 5. Here, since the outer shaft 4 is fixed, the slave volume 5 rotates together with the main volume 3 while the internal slider operates. Furthermore, when the rotary knob 6 is rotated in the opposite direction, the slider in the main volume 3 operates first, and then the slider in the slave volume 5 operates in the same manner as described above.

As described above, since complete differential operation can be performed, it can be used in place of a dedicated backlash volume. Incidentally, in the above example, an example using a general coaxial type volume was described, but it goes without saying that the same implementation is possible even if the slave volume 5 is replaced with a changeover switch. In addition, in the above example, the rotational torque of the main volume 3 was set to be smaller than the rotational torque of the slave volume 5, but even if the torque relationship is set to be reversed, the relative relationship of the volume that operates first will change. is simply reversed, and no problem occurs.

(Effect of the invention) According to the differential variable resistor according to the invention, an inexpensive general coaxial volume can be used to perform the same operation as a dedicated backlash volume, so the cost can be reduced by about 1. It can be reduced to about /3. Further, it has excellent features such as being easy to implement without the need to add any special parts.

[Brief explanation of the drawing]

Fig. 1A is a partially cutaway side view of a conventional backlash volume, Fig. 1B is a front view showing the internal structure of the conventional backlash volume, and Fig. 2
The figure is a partially cutaway side view showing an embodiment of the differential variable resistor according to the present invention. 1... Coaxial volume, 2... Inner shaft, 3...
...Main volume, 4...Outside axis, 5...Subvolume, 7...Shas.

Claims (1)

[Claims for Utility Model Registration] A differential variable resistor in which the other variable resistor operates in conjunction only when one variable resistor is operated over a certain range. , A double coaxial type, non-interlocking type volume is used, and only the outer shaft of the volume is attached to the chassis, so that differential variable operation can be performed by rotating only the inner shaft. A differential variable resistor comprising: