Canon Kabushiki Kaisha

Masayuki Sakai

Shinichiro Matsumoto

Satoru Nagashima

Takahiro Yoneyama

Fumiyuki Yamatsuka

Shuichiro Sugimoto

Toshiaki Sugiyama

Naoki Kanno

Haruyuki Hotta

An image forming apparatus having a detachable replenishment container includes an image bearing member, a developer container, a developing bearing member to develop an electrostatic latent image formed on the image bearing member into a toner image by using toner accommodated in the developer container, and a replenishment port through which the developer container can be replenished with toner from the replenishment container. A restriction member transitions between an allowance state in which the replenishment container and the replenishment port communicate with each and a restriction state in which the replenishment container and the replenishment port are not made to communicate with one another.

Image forming apparatus having toner replenishment

A power supply apparatus generates an output voltage. A boost circuit boosts a voltage supplied from a reference voltage source and generates a first power supply voltage. A processor controls switching the boost circuit on and off. A first transistor is connected to the first power supply voltage. A second transistor is connected to a collector of the first transistor. A resistance element is connected to a collector of the second transistor. A voltage source is connected to the resistance element and generates a second power supply voltage. A collector voltage, which is an output voltage, of the second transistor is controlled by controlling an amount of base current of the first transistor.

Power supply apparatus for supplying various voltages and image forming apparatus operating on voltage supplied from power supply apparatus

An image forming apparatus includes (i) a housing including a first connector, (ii) a drum unit, (iii) a development unit including a containing portion containing toner and movable between an abutment position and a separation position, (iv) a detection unit including a light emitting element, a light receiving element, and a second connector electrically connected to the light emitting element and the light receiving element, and mounted on the development unit, and (v) a connection member connected to the first connector and the second connector to electrically connect the first connector and the second connector each. A length of the connection member is longer than a first distance from the first connector to the second connector when the development unit is located at the abutment position, and is longer than a second distance from the first connector to the second connector when the development unit is located at the separation position.

Image forming apparatus

The power supply apparatus includes a circuit board on which mounted are a transformer, a switching element connected in series with a primary winding of the transformer, a rectification element connected with a secondary winding of the transformer, a detection unit detecting a temperature of the rectification element when the transformer is supplied with power by a switching operation of the switching element, and a resistance element connected in parallel with the rectification element. The resistance element is mounted at a predetermined mounting section among a plurality of mounting sections on the circuit board.

Power supply apparatus and image forming apparatus

An apparatus includes a photosensitive member on which an electrostatic latent image is formed, a developing unit that develops the electrostatic latent image as an image by using toner, an image bearing member to which the image is transferred, a detecting unit including a plurality of light-emitting elements that emit light toward the image bearing member and a light-receiving element that receives light reflected from a detection target, and a control unit that adjusts an image forming condition. The control unit adjusts a light-emission ratio between the light-emitting elements based on a difference between a reflected light amount at a first position on the image bearing member and a reflected light amount at a second position.

Image forming apparatus adjusting light emission of light-emitting element

The circuit substrate includes at least two lands formed on a substrate, wherein one electrode is to be mounted on the at least two lands, an electronic part having electrodes, one of the electrodes is soldered on the at least two lands with solders whose amounts are adjusted by a metal mask having at least two opening parts, positions of the at least two opening parts corresponding to the at least two lands when the solders are applied and melted, areas of the at least two opening parts being different with each other, wherein a height of one of the solders is different from a height of the other of the solders according to the difference of the areas of the at least two opening parts of the metal mask, whereby the electronic part is mounted on the circuit substrate in an inclined state.

Method of mounting electronic part, circuit substrate, and image forming apparatus

An image forming apparatus includes an image forming portion configured to form a developer image on a recording material, a fixing portion configured to heat-fix the developer image to the recording material, a first motor configured to drive the image forming portion, a second motor configured to drive the fixing portion, and a control portion configured to control the first motor and the second motor. The second motor is a stepping motor. The control portion allows the second motor to start rotation at a speed in a self-start region, temporarily stops the second motor at a timing at which the first motor is activated, then allows the second motor to restart rotation at a speed in the self-start region, and changes the speed of the second motor to a speed outside of the self-start region before the recording material arrives at the fixing portion.

Image information apparatus

To prevent the detection accuracy from deteriorating due to stray light, an optical apparatus includes the following configuration. The optical apparatus includes a light-emitting member, a light-receiving member, and a substrate on which the light-emitting member and the light-receiving member are mounted. The substrate includes a plate-like substrate layer and a plate-like conductive layer. The optical apparatus further includes a light-shielding member disposed between the light-receiving member and the light-emitting member and inserted in a through-hole of the substrate provided between the light-receiving member and the light-emitting member. The light-receiving member receives reflected light from a portion to be irradiated with the light emitted from the light-emitting member. The conductive layer is excellent in light-shielding property compared to the substrate layer. The conductive layer is exposed to an inner cylindrical surface of the through-hole.

Optical apparatus and image forming apparatus including the optical apparatus

The image forming apparatus includes a plate movable up and down, a control cam that moves the plate up and down, a stepping motor that derives the control cam, a sheet feeding roller that contacts the sheet on the plate moved up by the control cam to feed the sheet held in contact with the feeding unit through rotation caused by drive from the stepping motor, and a control unit that controls the stepping motor. The control unit rotates the stepping motor at a first speed so that the control cam moves the plate up. After the sheet feeding roller is rotated, when the sheet feeding roller is stopped to stop the stepping motor, the control unit changes the rotational speed of the stepping motor from the first speed to a second speed.

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Yokohama, Japan

Masayuki Sakai