Yamaha Corporation

Toshiba Tec Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Kabushiki Kaisha Kawai Gakki Seisakusho

Jun Ishii

Yoshiaki Sugizaki

Takahiro Kawaguchi

Ken Iguchi

Hiroyuki Taki

Hiroyuki Sugiyama

Isao Yahata

Hiroyuki Tsuchihashi

Kikuo Mizutani

Toshiaki Oshiro

Chiaki Iizuka

Hidetoshi Yokochi

Yuichi Saito

Hiroyuki Hazu

Yoichi Yamaguchi

Hiroyuki Taguchi

Yasunobu Terao

Mikio Yamamoto

Haruki Uehara

Yasuhiko Oba

Shoichi Dobashi

Kenta Ohnishi

Shigeru Muramatsu

Yuji Fujiwara

Kenichi Nishida

Takahiro Kojima

Yoshimasa Isozaki

Rei Furukawa

Takashi Tamaki

Harumichi Hotta

Hisashi Nagai

Taro Kawabata

Yoshihiro Shiiya

Motoshi Ueda

Satsuki Kawahashi

Hidenori Kugimoto

Takeyoshi Aihara

Rokurouta Mantani

Kenichi Ookubo

Hidehisa Yasuno

Shunsuke Ando

Yoici Yamaguchi

Shinya Mizoshiri

Tomomi Iljima

Mariko Takahashi

Yasuhito Ishihara

Takeshi Kono

Yoshiyuki Harada

A musical instrument includes: an acoustic portion that makes sound in response to vibration; an exciter that includes an exciter body and a vibrating portion vibrating with respect to the exciter body, and excites the acoustic portion; and a support portion that is attached to the acoustic portion and supports the exciter body such that the vibration is transmitted from the vibrating portion to the acoustic portion. The support portion supports the exciter body such that the exciter body is elastically displaced with respect to the acoustic portion. A resonance frequency of a vibration system including the exciter body and the support portion is lower than the lowest resonance frequency of the acoustic portion.

Musical instrument

An apparatus includes a first resonant circuit including a first coil mounted to a movable member; a second resonant circuit including a second coil facing the first coil and generating a magnetic field upon supply of an electric current and outputs a detection signal of a voltage level depending on a relative position of the second coil to a position of the first coil; and a first equivalent circuit equivalent to the second resonant circuit in a case where a distance between the first and second coils is infinite and a second equivalent circuit equivalent to the second resonant circuit in a case where the distance is zero. A processor corrects the detection signal based on an output signal output from the first equivalent circuit and an output signal output from the second equivalent circuit, and calculates, based on the corrected detection signal, a displacement amount of the movable member.

Displacement amount detection apparatus, displacement amount detection method, and manipulation information output apparatus

An operation detection device for a key operation of a keyboard device includes a conductive unit configured to be disposed on each of keys, a substrate configured to be disposed facing each of the keys in a pressing direction of the keys. The substrate is provided with a sensor including at least first and second coils, the sensor being configured to be disposed spaced from one key so that at least one of the first or second coil outputs a signal corresponding to a distance between the one key and the respective sensor. The operation detection device includes a detection unit configured to detect a displacement of the one key in at least one of a yaw direction or a roll direction based on signals output from the first and second coils during a key pressing stroke of the one key.

Operation detection device for key operation of keyboard device, operation detection method of key operation, and keyboard device

An audio device includes a base portion a power supply circuit arranged on the base portion and configured to output electric power; a rotation body rotatably supported by the base portion and configured to, upon rotation of the rotation body, move a playback point of a piece of music; an electric circuit arranged on the rotation body; and a non-contact power feeding mechanism configured to supply in a non-contact manner the electric power output by the power supply circuit to the electric circuit in which the non-contact power feeding mechanism is arranged on a path from the power supply circuit to the electric circuit.

Audio device including non-contact power feeding mechanism

An image forming apparatus comprises a first temperature detector to detect a temperature of a first portion of an optical scanning device in a printer. The first portion is proximate to a heat generating element in the optical scanning device. A second temperature detector is provided to detect a temperature of a second portion of the optical scanning device, which is farther from the heat generating element than the first portion. A controller is configured to perform alignment control for correcting a color positional shift of the printer when either a detected temperature change of the first portion is greater than or equal to a first threshold value or a detected temperature change of the second portion is greater than or equal to a second threshold value.

Image forming apparatus and image correction method

A circuit includes a signal processor configured to perform a signal processing, an amplifier configured to amplify a signal output from the signal processor, a first power supply path connected from a battery to the signal processor, a second power supply path connected from the battery to the amplifier, a capacitor connected to the second power supply path and that assists power supplied to the amplifier, and a power limiter connected to the second power supply path and that limits input power supplied from the battery.

Circuit and musical instrument

A sheet processing apparatus includes a sheet tray on which one or more sheets to be processed are placed, an adhesive applying unit having an end portion that faces the sheet tray and holds an adhesive material and configured to move towards the sheet tray up to a position at which the end portion is in contact with or proximate to a sheet on the sheet tray and apart from the sheet tray, a pressing member configured to move into and out of a moving path of the adhesive applying unit and a control unit. The control unit is configured to cause the pressing member to be in the moving path of the adhesive applying unit when the pressing member is moved towards the sheet tray, such that the pressing member is pressed against a sheet on the sheet tray by the adhesive applying unit.

Sheet processing apparatus that applies an adhesive for binding sheets

A circuit includes: a signal processing unit which is configured to perform signal processing; an amplifying unit which is configured to amplify a signal output from the signal processing unit; a first power supplying path which is extended from a battery to the signal processing unit; a second power supplying path which is branched from the first power supplying path, and which is extended to the amplifying unit; a power limiting unit which is provided in the second power supplying path, and which is configured to limit power flowing in the second power supplying path; and a capacitor which is connected to the second power supplying path, and which is configured to supplement power to be supplied to the amplifying unit.

An audio signal that is output from a sound source circuit () is caused to flow through a coil () in a transducer for vibrating a soundboard, and the vibration of the soundboard generates an acoustic signal. A microcomputer () calculates a temperature of the coil () with high accuracy by inputting an ambient temperature (Ta) detected by an ambient temperature sensor () and a voltage (V) applied to the coil () and executing computation based on a thermal equivalent circuit of an acoustic signal converter using the ambient temperature and the voltage that are input thereto, the computation including calculation of an amount of electric power consumed in the coil () using the input voltage.

Temperature measurement device and protective device for acoustic signal converter

In accordance with one embodiment, a sheet binding apparatus comprises a pasting section and a control section. The pasting section is capable of selectively carrying out pasting processing on at least one of a plurality of different given pasting target areas on sheets to be pasted. The control section controls the execution of the pasting processing based on the pasting section so that pasting target areas of a first sheet and a second sheet other than the first sheet within a plurality of sheets to be subjected to binding processing are different.

Sheet binding apparatus, sheet binding method and sheet post-processing apparatus

Selectively controlling the pasting area of each sheet in a sheet binding device

An audio signal output from a tone generator is fed into a coil provided in a transducer for vibrating a sound board, so that a sound signal is generated by the vibration of the sound board. A predetermined DC voltage supplied by a constant voltage source circuit is superimposed on the audio signal by an adding circuit, so that the superimposed signal is fed into the coil. A current passing through the coil is sensed by a current sensing resistor, so that only a DC voltage component of a voltage signal on the both ends of the resistor is extracted by a low-pass filter circuit to be supplied to a microcomputer via an A/D converting circuit. The microcomputer figures out a resistance value and a temperature of the coil by use of the DC voltage component and the certain DC voltage value.

Temperature measurement apparatus and protection apparatus for sound signal converting device

An audio signal output from a tone generatoris fed into a coilprovided in a transducer for vibrating a sound board, so that a sound signal is generated by the vibration of the sound board. A microcomputerobtains temperature values of the coilmeasured by two different methods, and suspends supply of audio signals to the coilor reduces the amount of audio signals supplied to the coilif the difference between the two coil temperature values is outside a predetermined range. In a case as well where one of the two coil temperature values has risen excessively, the microcomputersuspends supply of audio signals to the coilor reduces the amount of audio signals supplied to the coil

Protection apparatus for sound signal converting device

A pickup device includes: a speed detector which is configured to detect speed of vibration of a soundboard of an acoustic musical instrument; and a signal generator which is configured to generate an audio signal from the speed detected by the speed detector and to output the audio signal.

Pickup device

A heating device includes first and second heating rollers and first and second pressing rollers. The first pressing roller and the second heating roller forms a first unit, and the second pressing roller and the first heating roller forms a second unit that is rotatable about a rotational axis relative to the first unit. The heating device also includes an eccentric shaft unit disposed on one of the first unit and the second unit and extending in a direction parallel to the rotational axis, a rotational position of an eccentric portion of the eccentric shaft unit being changeable, and an engaging unit disposed on the other one of the first unit and the second unit, and configured to engage with the eccentric shaft, a position of the second unit relative to the first unit being adjusted when the rotational position of the eccentric portion of the eccentric shaft unit is changed.

Adjustable heating device for use in an erasing apparatus

Growing community of inventors

Hamamatsu, Japan

Jun Ishii