JPS60128602A - Multiple series multiple rotation variable resistor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a multiple multi-rotation volume that simultaneously varies two or more multi-rotation volumes.

[Background of the invention]

A multi-channel volume that has been used in the past is a combination of two or more volume 1. l'i are connected via a common adjustment shaft 2, and are configured to extract resistance value changes from each terminal 3, but the rotation angle of the adjustment shaft 20 is limited to about 300 degrees, and the resolution is 0. , it was low at around 5%. For this reason, when higher resolution is required, a method of connecting such multiple volumes in multiple stages has generally been used.

However, this multi-stage connection configuration has the drawbacks of being thick, making it difficult to attach to a printed circuit board or the like with limited storage space, and increasing the price.

[Purpose of the invention]

An object of the present invention is to provide a multi-rotation volume that is small in size, inexpensive, and capable of obtaining high resolution.

[Summary of the invention]

In the present invention, a knob with a gear is provided on the adjustment shaft of a multiple multi-rotation volume, and the knobs are connected so as to mesh with each other.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in detail using examples.

3 and 4 are a sectional view and a top view of a multiple rotary volume used in the present invention, in which an adjustment shaft 2 having a threaded portion 5 is inserted into the case 4, and the case 74 has both ends. It's fixed, it's fixed. Further, an O-ring 6 is attached to the adjustment shaft 2 for airtight sealing.

On the other hand, a ceramic plate 9 having a resistor 8 formed by vapor deposition printing is adhered to the base 7.
The terminal is taken out as the volume terminal 3 on the opposite side of the base 7 from the ceramic plate 9.

In this case, when installing the base 7 in the case 4, the adjustment shaft 2
The slider 10, which has the same thread groove as the whole slider 10, is placed on the adjustment shaft 2, and the slider 10 is sandwiched between the adjustment shaft 2 and the ceramic plate 9, so that the slider 10 is assembled. On the other hand, a resilient contact 11 is attached to the slider 10 and contacts the top of the resistor 8, and as the slider 10 moves horizontally with the rotation of the adjustment shaft 20, the relative position of the contact 11 is changed, and the resistance f
iFi is variable.

In this case, when the movement of the slider 10 is stopped and the adjustment shaft 2 is further rotated, the slider 10 is pushed downward and the adjustment shaft 2
The screw thread of the slider 10 comes off and the slider 1 is reattached.
0 returns to the previous position. Therefore, even if the adjustment shaft 2 is rotated any further, the resistance will not change and the slider 10 will not be damaged.1. In other words, it has a stopperless structure.

In a volume with such a structure, the contactor 2 moves from one end of the resistor 8 to the other end when the adjustment shaft 2 rotates more than ten times, so the resolution is very good, with a resolution of about 0.05%. There is. Figure 5 is a graph showing the rotational speed N (horizontal axis) and resistance change R (vertical axis) of such a volume, and the total rotational speed N and the rotation angle of 1-L are NX360 degrees. Therefore, the rate of change in resistance relative to the unit rotation angle (' is R
/NX360, indicating that the resolution is improved.

By the way, the volume size of V is length 20~3Q111
The width is 111°, the width is 5 Tagawa, and the quotient is about 71 nm.

Figures 7 and 7 are a top view and a top view showing an embodiment of the present invention. Knob 1
2,12"lr-mounted, and the printed circuit board 11C is attached by interlocking with two volume kpA wheels.In addition, here, two poly
A holder 14 is used to facilitate attachment to 13.

By rubbing in this way, when the knob 12 is rotated, the resistance of the volume 1 changes, and the twisted knob 12' is also rotated in conjunction with the knob 12.
resistance also changes. Conversely, when the knob 12' is rotated, the knob 12 is also rotated. The arrows shown in Figure 7 indicate the direction of rotation.
It shows. As mentioned above, by using a multi-rotation volume having a geared motor = "k", it is possible to
i It can be seen that a double volume is simply obtained5, and furthermore,
Even if the position of the slider 1o of the volume 1 and volume 1' of these two volumes is different when installed, if the knob of one volume is rotated in the same direction beyond the maximum adjustment rotation speed, the slider of both volume 10 is near the end of the resistor 8, and both volumes can be returned to their initial adjustment states. Figure 8 explains the situation, and shows the resistances (ikff:r,
When the maximum adjustment rotation speed is set to n, the resistance value of volume 1 is 几', and the resistance value of volume 2 is
Suppose that it is attached to 3. Therefore, if the knob is rotated to one side in this state, the resistance value of the volume 2 becomes R=r when the knob is rotated to N2.

Then, the slider 10 is further rotated in the same direction as υ', so that the slider 10 does not move), and remains in the state of (,=1-).

However, the resistance value of the volume 1 changes over time, and the resistance value increases until it rotates N-13 times until R=r. Therefore, even if the knob ffi is rotated over L, both volumes will be 1 and 1.
' resistance r, j: 13. when N = n. =rG
7) When the head and the knobs are reversed, they change on the straight line O-P. Therefore, once adjusted to this state, from then on, the two volume resistors 1i are always connected to the O-P line.
O changes.

Therefore, it is difficult to make special adjustments to the knobs when installing the two 1.1"r volumes on the printed circuit board 13.

On the 91st fire, turn the 5 volume knobs 12 and 12'.
FIG. 2 is a diagram showing all other embodiments of the present invention, which are continuous. In this example, the central volume knob 12 has a minus groove for adjustment, but the other four volume knobs V
C has no negative groove formed. In such a configuration, by rotating the knob 12, the resistances of the five volume controls can be varied simultaneously. Note that, as shown in the graph of FIG. 10, even if the resistances of the five volumes are all different, there is no problem with the side tube, and it is possible to combine them arbitrarily.

No. 1113y'l is a diagram showing another embodiment using a volume having a different maximum adjustment rotation speed. In this example, the maximum adjustment rotation speed of the volume 1 is N, and that of the volume 2 is N 2 (N + < N 2 )1
In such a configuration, by changing the number of teeth on the gears of each knob, the number of teeth on the gears is determined so that when the volume 1 is rotated N, the knob of the volume 2 rotates N7 times.

That is, if the number of teeth on the knob of the volume 1 is M1 and the number of teeth on the knob of the volume 2 is M2, then the following equation should hold.

N.M.

N, M2 At this time, the rotation speed of the knob of the volume 1 and the change in resistance are as shown in FIG. In FIG. 12, r represents the resistance value of the volume 1, and r/ represents the resistance value of the volume 2.

Figure 13 shows another example 7i applied to the non-invention gold vertical phorium.
f! This is a full illustration of one example. In this example, the adjustment axis of the volume is perpendicular to the printed circuit board, and the gear side knob is attached in the same way as in FIG. 6. Therefore, the sixth
The same effect as the embodiment shown in the figure can be obtained.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a small-sized, high-resolution multiple volume can be constructed relatively easily.
Moreover, it can be manufactured at low cost, and it has the advantage of being able to use any combination of VVs with different resistance values and maximum adjustment rotation speeds on a printed circuit board. volume, when changing the constants of multi-class amplifiers synchronously, 1 mo C of multiple parts
This is useful for adjusting the volume when the time constants are all synchronized [
If so, it will have extremely beneficial effects.

[Brief explanation of drawings]

FIGS. 1 and 2 are a configuration diagram and a circuit diagram of a conventional multiple multi-rotation volume, FIGS. Characteristic diagrams No. 6191 and No. 71 C1 are all diagrams of one embodiment of the present invention, FIG. 8 is a characteristic diagram of another embodiment of the present invention, FIG. 9 is a diagram showing another embodiment of the present invention, and FIG. Yu that characteristic diagram? ,
l Figure 1 is a diagram showing still another embodiment of the present invention;
The figure is a characteristic diagram thereof, and FIG. 13 is a diagram showing another embodiment of the present invention. 1...Volume, 2...Adjustment shaft, 3...Volume terminal, 4...Case, 5...Screw part, 6...O
Ring, 7... Base, 8... Resistor, 9... Ceramic plate, 10... Slider, 11... Contact,
12...Knob, 13...G No. 7 Figure 3' A B □ N''7Magneticθ'; Key 2゜I2Y 1!

Claims (1)

[Claims] 1. In a multiple multi-rotation volume whose resistance value is varied by multiple rotations of an adjustment shaft, a recess with a gear is provided on the adjustment shaft, and a plurality of volume is arranged so that the rotation of the gears is transmitted to each other. A multi-rotation volume connected to a series.