Canon Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Tajima Incorporated

Koden Techno Info K.k.

Hiroshi Mano

Takashi Kawana

Minoru Hayasaki

Kaoru Seto

Atsushi Kashihara

Tetsuo Saito

Hiromichi Yamada

Hiroshi Sasame

Masaki Ojima

Masaharu Ohkubo

Aoji Isono

Masayuki Tsurusaki

Terunori Suwa

Seiji Uchiyama

Takashi Watanabe

Toshiaki Tanaka

Yuki Nishizawa

Michio Itoh

Isaku Komuro

Yoshihiro Kawauchi

Nobuhiro Masaki

Setsuo Kimura

Yoshihito Nagano

Akira Kuroda

Michio Ito

Osamu Nagasaki

Yoshikazu Sano

Hiroshi Atobe

Hideyasu Mori

Masatoshi Itoh

Yuichi Yamazaki

Michio Uchida

Takashi Aoki

Kiyoshi Kanaiwa

Yusuke Isomi

Norimitsu Ikehata

Atsuyoshi Abe

Tetsuya Sano

Akihiko Takeuchi

Toshio Miyamoto

Atsuhiko Yamaguchi

Yasuo Yoda

Kouji Yasukawa

Masamichi Iida

Hiroshi Shiba

Daisuke Murata

Kiyofumi Nakane

Takashi Sato

Akira Kato

Atsushi Ogata

Hideo Nanataki

Takaaki Tsuruya

Katsuhisa Matsunaka

Hajime Sekiguchi

Takahiro Uchiyama

Takashi Soya

Takuya Mukaibara

Nozomu Nakajima

Shimpei Matsuo

Atsushi Shoji

Takashi Nomura

Yasuhiro Nakata

Fumihiro Ueno

Kimitaka Ichinose

Toshikazu Tsuchiya

Naoto Tsuchihashi

Yasunari Kobaru

Yoshiki Kudo

Takao Kawazu

Toshio Yoshimoto

Hiroki Eguchi

Masatake Usui

Makoto Abe

Tomoo Nagaoka

Iwao Hasegawa

Yosuke Kitagawa

Tamotsu Wakabayashi

Junichi Shiomi

Koichiro Yabu

Seishiro Ishiyama

Yasuo Yanagida

A cylindrical fixing member for use with a fixing device includes a heat generating layer and an electrode layer contacting the heat generating layer. The electrode layer is smaller in volume resistance value than the heat generating layer. The electrode layer is formed in a helical shape so that a helical axis thereof extends in a direction along a generatrix direction of the fixing member. One end and the other end of the electrode layer are electrically open.

Cylindrical fixing member, fixing device and image forming apparatus

A piezoelectric transformer includes a piezoelectric element. Two primary side electrodes exist on the primary side of the piezoelectric element. The primary side electrodes are coupled by a resistor formed from a conductive coating. A discharge current is discharged via the resistor to protect a semiconductor component from the discharge current. Since neither a short-circuit terminal nor conductive jig is required, electrostatic discharge damage to a semiconductor component can be prevented by a low-cost arrangement.

Printed circuit board, power supply apparatus, image forming apparatus, and printed circuit board manufacturing method

A vehicle operation analysis system according to an embodiment of the present invention comprises: a first acceleration sensor configured attachable to an animal which is an object-to-be-operated operated by an operator, the first acceleration sensor measuring acceleration of the object-to-be-operated and outputting first acceleration data; a first communication device configured attachable to the object-to-be-operated, the first communication device being inputted with the first acceleration data from the first acceleration sensor and transmitting the first acceleration data; a second communication device configured attachable to the operator, the second communication device receiving the first acceleration data from the first communication device and outputting the first acceleration data; a second acceleration sensor measuring acceleration of the operator and outputting second acceleration data; and a calculation processing device that compares postures of the operator and the object-to-be-operated based on the first acceleration data and the second acceleration data.

Vehicle operation analysis system

Disclosed is a cylindrical rotary member including a conductive layer; a coil disposed inside the rotary member, the coil including a helical portion having a helical axis that is substantially parallel to a generatrix direction of the rotary member, the coil forming an alternating magnetic field to generate heat in the conductive layer by electromagnetic induction; a core disposed inside the helical portion, the core inducing a line of magnetic force of the alternating magnetic field; a roller coming in contact with an outer surface of the rotary member to form a fixing nip portion; and a metal stay disposed inside the rotary member, in which an image on a recording material is fixed to the recording material by being heated at the fixing nip portion and the stay is disposed outside the coil and has a shape that does not form an electrical loop around the coil.

Fixing device

A fixing device configured to fix an image on a recording material, includes: a rotary member including an electroconductive layer; a coil which has a spiral shaped portion and is disposed in the inside of the rotary member; and a core disposed in the spiral shaped portion; with magnetic resistance of the core being, with an area from one end to the other end of the maximum passage region of the image on the recording material regarding the generatrix direction, equal to or smaller than 30% of combined magnetic resistance made up of magnetic resistance of the electroconductive layer and magnetic resistance of a region between the electroconductive layer and the core.

Image fixing device

An image heating apparatus configured to heat an image formed on a recording material includes a cylindrical rotatable member including a conductive layer, a magnetic core inserted through the rotatable member, a coil helically wound around an outer side of the magnetic core within the rotatable member, and an inverter configured to supply an alternating current to the coil. A frequency of the alternating current supplied from the inverter is within a range of 20.5 to 100 kHz. The conductive layer generates heat by electromagnetic induction due to an alternating magnetic field produced from the alternating current supplied to the coil. The coil is wound at an interval of 1 mm or longer.

Image heating apparatus

A fixing apparatus configured to include a rotational member having a conductive layer, a coil having a helical shape, a resonance circuit including a resonance capacitor and configured to be formed together with the rotational member and the coil, a first converter driving the resonance circuit, a second converter used to control power to be supplied to the first converter, a frequency setting unit configured to set a driving frequency of the first converter according to at least one of a size of the recording material and a temperature at a sheet non-passing portion of the rotational member, and a power control unit controlling the second converter according to a temperature at a sheet passing portion of the rotational member to control the power to be supplied to the first converter from the second converter, wherein the conductive layer is caused to generate heat by electromagnetic induction.

Fixing apparatus

A fixing apparatus includes a tubular rotation member including a conductive layer, a helical coil, a resonance circuit, including a resonance capacitor, formed with the rotation member and the coil, a resonance inverter configured to control the resonance circuit, and a control unit configured to control electric power supplied to the resonance inverter, wherein the conductive layer generates heat with electromagnetic induction caused by magnetic flux generated through the coil, wherein the control unit sets a driving frequency of the resonance inverter according to at least one of a size of the recording medium and a temperature of a non-sheet-passing portion of the rotation member, and wherein the control unit changes a resonance frequency of the resonance circuit according to the set driving frequency.

In a fixing device, an alternating current is caused to flow through a coil so as to causes an electrically conductive layer of a rotating member to generate heat, and an unfixed image on a recording medium is heat fixed onto the recording medium by the heat generated by the electrically conductive layer. A frequency range of the alternating current is from 20.5 kHz to 100 kHz. With respect to a generatrix direction of the rotating member, a magnetic member and a spirally shaped portion of the coil have lengths, with which the magnetic member and the spirally shaped portion extend beyond both end portions of the rotating member.

The power supply apparatus includes a transformer having a primary and secondary sides, a first line and a second line to which an AC voltage is input from an AC power supply, a rectifying and smoothing unit that rectifies and smoothes the AC voltage, a shut-off unit provided between the first line and the rectifying and smoothing unit, a switching element that switches a current from the rectifying and smoothing unit to the primary side of the transformer, a first overvoltage detection unit that outputs a voltage corresponding to the AC voltage, a second overvoltage detection unit that outputs an overvoltage detection signal; and a control unit that controls the shut-off unit to shut off the input of the AC voltage.

Low power consumption accurate power supply overvoltage detection

A power source device that outputs a DC voltage includes a rectification unit configured to rectify an input pulse voltage, a voltage-current conversion unit disposed on a side where the pulse voltage is input into the rectification unit, a current-voltage conversion unit configured to convert a current from the voltage-current conversion unit into a voltage, and a comparison unit configured to compare the voltage from the current-voltage conversion unit with a reference voltage. An operation of the rectification unit is controlled based on an output from the comparison unit.

Power source device and image forming apparatus

Growing community of inventors

Numazu, Japan

Hiroshi Mano