JP3776693B2 - Rotating knob torque variable mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a torque varying mechanism for a rotary knob, and more particularly to a torque variable mechanism for a rotary knob that can arbitrarily set the operating torque of the rotary knob with a small force.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a rotary knob torque variable mechanism that can set a torque for operating a rotary knob for rotating a rotary encoder or the like to an arbitrary magnitude is known. Examples of such a conventional torque variable mechanism of a rotary knob are shown in FIGS. As shown in FIGS. 9 and 11, the nut 6 that is screwed into the screw 4 b of the rotary encoder 4 through which the panel 1 is inserted fastens the rotary encoder 4 to the rib 1 c of the panel 1 via the washer 5.
[0003]
As shown in FIG. 9, the rotary knob 7 is fastened to the shaft 4 a of the rotary encoder 4 by a worm screw 8. As shown in FIGS. 7, 9 and 11, the rotating member 2 has a shaft 4a inserted therethrough and is supported by the rib 1c and the washer 5 so as to be rotatable around the shaft 4a.
[0004]
The rotating member 2 is provided with two torque setting arms 2a, 2a and an operation lever 2b extending radially with respect to the shaft 4a. A cushion 3 is attached to the tip of the torque setting arm 2a.
[0005]
As shown in detail in FIG. 8, the back surface of the torque setting arm 2a is in contact with the rib 1d provided on the panel 1, and the height of the rib 1d with which the torque setting arm 2a comes into contact when the rotating member 2 is rotated. The height of the cushion 3 in the direction of the rotary knob 7 changes. Therefore, the contact pressure of the cushion 3 with respect to the bottom surface sticking sheet 7a attached to the bottom surface of the rotary knob 7 changes, and the operation torque of the rotary knob 7 can be varied.
[0006]
The rotation position of the rotation member 2 is set by the operation lever 2b. As shown in FIGS. 11 and 12, the distal end of the operation lever 2b extends near the side surface of the rotary knob 7. The distal end of the operation lever 2b is gripped as shown in FIG. As shown in FIGS. 7 and 11, the projection 2 d provided on the operation lever 2 b is firmly fitted in the arc groove 1 b of the panel 1 so that the set rotation position of the rotary member 2 does not change. .
[0007]
[Problems to be solved by the invention]
In the conventional torque variable mechanism of the rotary knob described above, the operation lever 2b must be pinched with a finger to rotate the rotary member 2, but the rotary member 2 is subjected to the frictional force of the rotary knob 7. Since the projection 2d is strongly fitted in the arc groove 1b of the panel 1 so that it does not rotate even if it is added, there is a problem that a strong force must be applied to the operation lever 2b.
[0008]
The present invention has been made in view of the above points, and an object thereof is to provide a torque variable mechanism of a rotary knob that can be operated with a light force.
[0009]
[Means for Solving the Problems]
In the rotating knob torque varying mechanism according to the present invention, a torque setting arm and an operation lever extending in a radial direction from a rotating shaft are provided on a rotating member that is rotatably arranged coaxially with the rotating knob. Slidably contacts the cam provided on the panel, the tip part moves up and down, and the cushion attached to the tip part comes into pressure contact with the bottom surface of the rotary knob, and the operation lever is strongly fitted with the arc groove provided on the panel. In the torque varying mechanism of the rotary knob provided with a projection to be joined and a tip portion extending to the periphery of the rotary knob, the tip of the operation lever is moved away from the rotary knob in the tip direction. It provided inclined with respect to the rotation axis, together with the tip portion and the rotary knob upon actuation torque setting of the rotary knob which is performed by rotating the torque setting arm The operating lever is what is the protrusion elastically deforms to allow to gently rotating the operating lever together with the rotary knob away from the arc groove by grasping.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
A torque variable mechanism for a rotary knob according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 3 and 4, the nut 6 that is screwed into the screw 4 b of the rotary encoder 4 through which the panel 1 is inserted fastens the rotary encoder 4 to the rib 1 c of the panel 1 via the washer 5.
[0011]
As shown in FIG. 3, the rotary knob 7 is fastened to the shaft 4 a of the rotary encoder 4 by a worm screw 8. As shown in FIGS. 3 and 4, the rotating member 2 has a shaft 4a inserted therethrough and is supported by the rib 1c and the washer 5 so as to be rotatable around the shaft 4a.
[0012]
The rotating member 2 is provided with two torque setting arms 2a, 2a and an operation lever 2b extending radially with respect to the shaft 4a. A cushion 3 is attached to the tip of the torque setting arm 2a.
[0013]
As shown in FIG. 2, the panel 1 is provided with cams 1a and 1a formed at corners of steps. As shown in detail in FIG. 3, the rear surfaces of the torque setting arms 2a and 2a are in contact with cams 1a and 1a provided on the panel 1, and the cam 1a is in contact with the torque setting arm 2a when the rotating member 2 rotates. The radial distance 1a changes, the elastic deformation amount of the torque setting arm 2a changes, and the height of the cushion 3 in the direction of the rotary knob 7 changes accordingly. Therefore, the contact pressure of the cushion 3 with respect to the bottom surface sticking sheet 7a attached to the bottom surface of the rotary knob 7 changes, and the operation torque of the rotary knob 7 can be varied.
[0014]
The rotation position of the rotation member 2 is set by the operation lever 2b. As shown in FIG. 5, the tip 2c of the operation lever 2b extends in the vicinity of the side surface of the rotary knob 7, and is tilted away from the rotary knob 7 toward the tip.
[0015]
Further, as shown in FIGS. 1, 4 and 5B, the projection 2d provided on the operation lever 2b is strongly against the arc groove 1b of the panel 1 so as not to change the set rotation position of the rotary member 2. It is fitted.
[0016]
When the rotation position of the rotation member 2 is set by the operation lever 2b, the tip portion 2c of the operation lever 2b is picked with the finger together with the rotary knob 7 as shown in FIGS. 6 (a) and 6 (b). When a force in the P direction is applied, the projection 2d of the operating lever 2b is separated from the arc groove 1b of the panel 1 as shown in FIG. 6B, and the rotating member 2 can be rotated with a light force. The operating torque can be easily set.
[0017]
【The invention's effect】
Conventionally, the rotating member for setting the operating torque of the rotary knob has been strongly fitted to the panel so that it does not rotate even if friction force is applied from the rotary knob, and the rotating member is used to set the operating torque. There was a problem that the load when rotating was extremely heavy and difficult to operate.
[0018]
On the other hand, according to the torque variable mechanism of the rotary knob of the present invention, the tip of the operating lever is gripped with a finger together with a finger, and the force is applied to the tip, and the protrusion of the operating lever is moved away from the arc groove of the panel. The member can be rotated with a light force, and the operating torque of the rotary knob can be easily set.
[0019]
Furthermore, in the past, it was necessary to remove the finger from the rotary knob and pick and operate only the operating lever. However, in the torque variable mechanism of the rotary knob of the present invention, the rotary knob and the operating lever are simultaneously picked and rotated. This makes it easier to operate.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a torque variable mechanism of a rotary knob according to an embodiment of the present invention.
FIG. 2 is a front view showing a panel to which the torque variable mechanism is attached.
FIG. 3 is a cross-sectional view taken along the line AA in FIG.
4 is a sectional view taken along line BB in FIG. 1. FIG.
FIG. 5A is a front view showing the torque variable mechanism, and FIG. 5B is a cross-sectional view showing the torque variable mechanism.
6A is a front view showing an operating state of the torque variable mechanism, and FIG. 6B is a cross-sectional view showing an operating state of the torque variable mechanism.
FIG. 7 is a perspective view showing an example of a conventional torque variable mechanism of a rotary knob.
8 is a view in the direction of arrow a in FIG.
FIG. 9 is a cross-sectional view taken along the line AA in FIG.
FIG. 10 is a front view showing the torque variable mechanism.
11 is a cross-sectional view taken along line BB in FIG.
FIG. 12 is a front view showing an operating state of the torque variable mechanism.
[Explanation of symbols]
1 panel, 1a cam, 1b arc groove, 1c, 1d rib 2 rotating member, 2a torque setting arm, 2b operation lever, 2c tip 2d protrusion 3 cushion 4 rotary encoder, 4a shaft, 4b screw 5 washer 6 nut 7 rotation Knob, 7a Bottom adhesive sheet 8 Rice thread

Claims (1)

A rotating member disposed coaxially with the rotating knob is provided with a torque setting arm and an operating lever extending in the radial direction from the rotating shaft. The torque setting arm is in sliding contact with a cam provided on the panel. A tip part is raised and lowered, and a cushion adhered to the tip part is in pressure contact with the bottom surface of the rotary knob, and the operation lever is provided with a projection that strongly fits with an arc groove provided on the panel and a peripheral part of the rotary knob. In the torque varying mechanism of the rotary knob provided with an extending tip, the tip of the operating lever is provided to be inclined with respect to the rotation axis of the rotary knob so as to be separated from the rotary knob toward the tip. The operating lever is elastically deformed by grasping the tip and the rotary knob together when setting the operating torque of the rotary knob by rotating the torque setting arm. It said projection torque variable mechanism of the rotary knob that allows to gently rotating the operating lever together with the rotary knob away from the arc groove Te.

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