JPH0348652Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a variable rotational torque mechanism for a rotary encoder used in control units and remote control units of various electronic devices.

[Conventional technology]

Currently, there are two types of rotating shafts of rotary encoders available on the market: a free type without a brake mechanism, and a brake type with a certain amount of friction.

The former has the disadvantage that there is too much freedom in the rotation of the shaft, making it difficult to set detailed data, while the latter has the ability to brake the rotation of the shaft, but the rotational torque is determined by the diameter of the knob used, and is subject to operator preference. In other words, it is not possible to meet the demand for a heavier or lighter rotational torque when turning a knob.

Here, in the past, a free type without braking properties was used for the rotating shaft of the rotary encoder, and the rotary encoder 1 was
Friction is created between the knob 15 combined with the rotating shaft 12 and the connecting shaft 13 of 1 and the unit panel 16, and the frictional force is changed by adjusting the mounting position of the knob 15. Fine adjustment is difficult. There are disadvantages in that it is not possible to obtain the rotational torque desired by the operator, and that the rotational torque is uneven.

[Problem that the invention attempts to solve]

As described above, with the conventional structure, it is difficult to adjust the rotational torque, and it may not be possible to obtain the rotational torque desired by the operator.

The present invention aims to eliminate these drawbacks and enable easy adjustment of rotational torque.

[Means for solving problems]

In order to achieve the above object, the present invention provides an elastic friction member in contact with the circumference of the rotating shaft of a rotary encoder, and compresses and deforms this member so that the contact pressure against the rotating shaft can be varied to adjust the rotational torque. .

FIG. 1 is a sectional view of the present invention, in which an adapter shaft 3 is attached to a rotating shaft 2 of a rotary encoder 1. The rotary encoder 1 is screwed to a fixture 4, and the fixture 4 is screwed to an operation panel 5. An elastic friction member 6 is inserted around the adapter shaft 3 and compressed by an adjustment dial 9 screwed into the fixture 4 via a washer 7.

[Effect]

When the adjustment dial 9 is turned clockwise, the elastic friction member 6 is compressed, the contact pressure against the adapter shaft 3 surface increases, and the torque for turning the knob 10 increases. By turning the adjustment dial 9 counterclockwise, the contact pressure is reduced and the rotational torque is reduced.

〔Example〕

An embodiment of this invention will be explained in detail below with reference to FIG. An adapter shaft 3 is fixed to a rotating shaft 2 of a rotary encoder 1, and the rotary encoder 1 is screwed to a fixture 4. Also,
The fixture 4 is attached to the operation panel 5. The elastic friction member 6 has a ring shape and is inserted into the adapter shaft 3 and housed in the bottom portion of the fixture 4. The elastic friction member 6 is compressed by an adjustment dial 9 incorporated into a threaded portion 8 of the fixture 4 via a washer 7.
The knob 10 is attached to the adapter shaft 3.

In this operation, when the adjustment dial 9 is turned clockwise, the elastic friction member 6 is compressed, the contact pressure of the elastic friction member 6 to the adapter shaft 3 increases, and the rotational torque of the knob 10 increases. When the adjustment dial 9 is turned counterclockwise, the elastic friction member 6 is restored to its original state, the contact pressure is reduced, and the rotational torque of the knob 10 is reduced.

[Effect of idea]

According to the present invention, the rotational torque of the knob can be obtained according to the operator's preference by adjusting the adjustment dial.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a rotary encoder of the present invention, and FIG. 2 is a sectional view of a conventional rotary encoder. 1...Rotary encoder, 2...Rotary axis,
3...Adapter shaft, 4...Mounting tool, 5...Operation panel, 6...Elastic friction member, 8...Threaded portion, 9...
...Adjustment dial, 10...knob.

Claims (1)

[Scope of utility model registration request] An elastic friction member is provided so as to be in contact with the rotation axis of the rotary encoder, and the elastic friction member is held by a fitting that connects to the rotary encoder, and is screwed into a threaded portion provided on the fitting. The variable rotational torque of the rotary encoder is characterized in that the rotary encoder has a structure in which the contact pressure to the rotary shaft is adjusted by pressing and deforming the elastic friction member with a friction adjustment dial, and the rotational torque of the rotary encoder can be adjusted. mechanism.