JPS5816012Y2 - Knob for small diameter rotating shaft - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a knob that is attached to the rotating shaft of an electronic component such as a volume or a switch that has a rotating mechanism used in communication equipment, and particularly relates to a knob that has a small diameter rotating shaft.

An example of a conventional knob is shown in FIG.

The knob 1 has a center hole 2 into which the rotating shaft of the electronic component is inserted, and two screw holes 3 are drilled at 90° intervals from the outer circumferential surface of the knob toward the center line of the center hole 2. A set screw 4 is screwed into the hole 3.

After inserting the center hole 2 into the rotating shaft of the electronic component, this knob is fixed with a presser foot 4.

The set screw 4 may be provided at one location, but usually two locations are provided.

This is because tightening in two places is more reliable than in one place, and when several knobs are lined up in a row, it happens that the set screw is tightened when the position is turned toward the adjacent knob. This is because there are cases where a screw tightening tool is not needed, and in that case, temporary tightening can be done with a tool in a different direction.

The knob 1 constructed in this manner is generally suitable for those whose rotary shaft diameter is larger than the thread diameter of the set screw 4, and is unsuitable for those whose diameter is smaller than the thread diameter of the set screw 4.

As shown in Figure 2, if the screw holes are spaced at 90 degrees, the screw holes will collide with each other and cannot be tightened securely.

Also, if the 90° intervals are shifted along the center hole,
In some cases, the length of the knob is larger than the length of the knob, causing inconvenience in terms of the retainer design.

Furthermore, if the rotating shaft is short, it has the disadvantage that it can only be tightened in one place.

In particular, when tightening at only one location, not only does it have the above-mentioned disadvantages, but also because the rotating shaft is thin, a sufficient tightening area for the set screw cannot be obtained, and a strong fixation cannot be expected.

The knob of the present invention is intended to eliminate the above-mentioned drawbacks by changing the position of the set screw, and will be explained below with reference to the drawings.

Figure 3 shows an embodiment of the present invention, with a central hole 1 into which the rotating shaft can be inserted.
1, the screw holes 12 into which the pressers 13 are inserted are shifted by a dimension l with respect to the center line of the center hole 11, and the press screws 13 are provided at two locations at 90° intervals.

This l may be approximately divided by the screw diameter of the set screw.

This eliminates the collision of the screw holes shown in FIG. 2 and allows fixation at two locations of the set screws 13.

In addition, according to the conventional method, the set screw was simply pushed in toward the center line of the rotating shaft, but by shifting the center line, the knob 1
This is effective for small-diameter rotating shafts, as the set screw is forced into the rotating shaft during zero rotational movement, ensuring reliable fixation.

[Brief explanation of drawings]

FIG. 1 is an example of a conventional knob, showing a plan view, a sectional view, and a set screw fixed to a rotating shaft. FIG. 2 is an explanatory plan view when the center hole of the knob is smaller than the screw diameter of the set screw. FIG. 3 is a plan view of the knob according to the present invention. In the figure, 10...knob, 11...
・Center hole, 12...Screw hole, 13...
It's a push.

Claims (1)

[Scope of utility model registration request] In a knob that is attached to the rotating shaft of an electronic component having a rotation mechanism, the position of the set screw that fixes the knob to the rotating shaft is at least approximately ÷ the thread diameter of the set screw from the center line of the rotating shaft hole of the knob. A knob for small-diameter rotating shafts that is characterized by being shifted.