# US 2021/0239495 A1 · Fader Device

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- Number: US 2021/0239495 A1
- Document ID: US20210239495A1
- Status: Published application
- Kind: A1
- Application number: 17/159,985
- Filed: 2021-01-27
- Published: 2021-08-05
- Earliest claimed: 2020-02-04
- Assignees: Yamaha Corporation
- Applicants: Yamaha Corporation
- Inventors: Yoshihiro NATSUME; Yoshihiro SUZUKI
- Web page: https://patentgrep.com/patent/US20210239495A1

## CPC

- G01D 5/24: by varying capacitance
- G01D 5/2417: {by varying separation}
- H01R 41/00: Non-rotary current collectors for maintaining contact between moving and stationary parts of an electric circuit (end pieces terminating in a hook or the like H01R11/12; current collectors for power supply lines of electrically-propelled vehicles B60L5/00)
- G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS

## Abstract

A fader device includes a conductive shaft, a conductive moving body, and a conductive portion. The conductive moving body is movable in the longitudinal direction of the shaft and includes a gap between it and the conductive shaft. The conductive portion brings the shaft and the moving body into electrical continuity. A signal generation portion generates a touch sense signal. A detection portion detects contact with the conductive moving body based on a signal output according to a capacitance generated between the conductive shaft and the conductive moving body in response to the touch sense signal.

## Claims

### Claim 1

A fader device comprising:
a conductive shaft;
a conductive moving body movable in a longitudinal direction of the conductive shaft and in which a gap is disposed with respect to the conductive shaft; and
a conductive portion that brings the conductive shaft and the conductive moving body into electrical continuity.

### Claim 2 (depends on 1)

The fader device according to claim 1, wherein
the conductive portion is interposed between the conductive shaft and the conductive moving body.

### Claim 3 (depends on 1)

The fader device according to claim 1, wherein
the conductive portion is a conductive bush that is provided on the conductive moving body.

### Claim 4 (depends on 1)

The fader device according to claim 1, further comprising:
a signal generation portion to generate a touch sense signal;
a detection portion to detect contact with the conductive moving body based on a signal output according to a capacitance generated between the conductive shaft and the conductive moving body in response to the touch sense signal.

### Claim 5 (depends on 4)

The fader device according to claim 4, wherein at least one of the signal generation portion and the detection portion is implemented by a processor including a central processing unit (CPU) executing a program stored in a storage unit, or using hard ware including a large scale integration (LSI), an application specific integrated circuit (ASIC) or a field-programmable gate array (FPGA).