摘要:
A mechanical pencil with automatic lead advance in which a slider is temporarily locked at the time when a rearward thrust applied to the pencil tip is released. The slider is locked by an arrangement in which a movable locking tube is disposed around the slider. The locking tube can be inclined relative to the longitudinal axis of the pencil by a spring device so that the slider, when retracted, can be temporarily locked by the inclination of the locking tube.
摘要:
A mechanical pencil having a writing point tube slidably mounted on the forward end portion of a pencil casing, an annular slider device slidably mounted within the pencil casing and having a lead retainer, a first spring for urging the writing point tube in the forward direction, a collet chuck mechanism having a lead engaging collet and a chuck-actuation cylinder, a second spring urging both the lead engaging collet and the chuck-actuation cylinder in the opposite direction and a third spring for urging the collet chuck mechanism in the forward direction. The pencil has a locking device for temporarily engaging the slider at its retracted position, and a pusher for releasing the engagement of the slider. When an axial thrust is applied to the writing tip of the pencil for lead advancement, the slider and the collet chuck mechanism as well are retracted within the pencil casing with their positional relation being unchanged. When the thrust against the writing tip is released, the collet chuck mechanism is advanced at first with the lead grasped therein to feed the lead out of the lead tube while the slider is temporarily engaged at its retracted position, and thereafter the pusher abuts against the slider to unlock it so that the slider advances by the effect of the first spring with the lead projecting from the lead tube.
摘要:
A mechanical pencil of knocking operated type includes an electrical indicator which provides a visible or audible indication of the presence or absence of a writing lead in the mechanical pencil. A power supply in the form of a cell or storage battery is loaded into a pen body. A first and a second channel are provided which electrically connect the power supply with the indicator. The first channel is associated with one of the poles of the power supply, and is formed by a collet chuck and a lead guide sleeve which are disposed within the pen body in spaced relationship from each other. The second channel is associated with the other pole of the power supply, and includes a switch which is operated in response to a knocking operation which drives the collet chuck. When a writing lead is present between the collet chuck and the lead guide sleeve, the both members are electrically connected together through the lead, whereby the first channel is rendered conductive. The second channel is rendered conductive when the switch is turned on in response to the knocking operation. Consequently, if any remaining lead is available, the indicator is operated each time the knocking operation takes place, but when the final lead is consumed to a degree that it is removed from the collet chuck, the knocking operation can not operate the indicator.
摘要:
A developer container may include a container body accommodating developer, a conveyance member, and a rotation member having a rotary shaft and an elastic part supported by the rotation member and configured to convey the developer. The container body may include a first support part to which the rotary shaft is loosely fitted, and a second support part that supports the rotary shaft. The container body may further include a sliding contact part that the elastic part sliding-contacts while being elastically deformed when the conveyance member is being rotated. In some examples, a distance from a center of the rotary shaft to a leading end of the elastic part gradually increases from the one end portion-side of the rotary shaft towards the other end portion-side of the rotary shaft.
摘要:
There is provided an image forming apparatus includes an apparatus body having an opening, an open/close member which opens and closes the opening, and an image forming unit which is drawable to an outside of the apparatus body through the opening. The open/close member includes a restraint member which is movable between a restraint position of restraining movement of the image forming unit and a restraint release position of releasing the restraint, and a moving member which moves the restraint member from the restraint position toward the restraint release position as the open/close member being moved from a close position to an open position. Once the restraint member is moved from the restraint position toward the restraint release position, the restraint member is held at the restraint release position not to be moved from the restraint release position to the restraint position even when the open/close member is moved.
摘要:
A control apparatus for a switching circuit includes a controller, a target-rotational-speed acquiring device, a target-torque acquiring device, and an ON-time varying device. The controller is configured to turn on a bidirectional conduction switching device provided parallel to a reverse conducting device through which a commutation current flows. The target-rotational-speed acquiring device is configured to acquire a target rotational speed of an alternating current motor. The target-torque acquiring device is configured to acquire a target torque of the alternating current motor. The ON-time varying device is configured to vary, on a basis of the target rotational speed and the target torque, an ON time period during which the bidirectional conduction switching device provided parallel to the reverse conducting device through which a commutation current flows is turned on.
摘要:
A process unit includes an image bearing member, a first frame, a developing unit, a pressing assembly, and a pressing-force adjusting assembly. The first frame supports the image bearing member. The developing unit includes a developing roller and a second frame supporting the developing roller. The pressing assembly generates a first pressing force acting on the developing unit such that the developing roller is in pressure contact with the image bearing member. The pressing-force adjusting assembly contacts one of the first frame and the developing unit and generates a second pressing force acting on the developing unit against the first pressing force. The second pressing force is smaller than the first pressing force.
摘要:
An image forming device includes a main casing, a support member, a plurality of developing cartridges, a handle provided to the support member, and a pair of interfering parts provided at both ends of the support member. Each developing cartridge includes a casing and a developing member supported by the casing. A gap between the pair of interfering parts is narrower than a length of the developing member, and the pair of interfering parts is located between the handle and one of the developing cartridges. Each of the interfering parts has a higher height than the handle.
摘要:
An image forming apparatus includes: a cartridge support unit in which a plurality of cartridges are supported; an abutment portion; and a first applying portion. The cartridge support unit moves in a mounting direction from a withdrawn position to a mounted position. The abutment portion is disposed at one of the main casing and the cartridge support unit. The first applying portion is disposed at the other of the main casing and the cartridge support unit. The first applying portion abuts on the abutment portion to apply a first resistance force in a direction opposite to the mounting direction to the cartridge support unit when the cartridge support unit moves in the mounting direction. The first applying portion and the abutment portion are configured such that the first resistance force continuously increases and then continuously decreases.
摘要:
A developer cartridge includes a housing and a detection gear having a detection protrusion detectable by detecting device of an image forming apparatus. The detection gear is rotatable between a first position and a second position. In the first position, the detection protrusion is detectable by the detecting device and a gear toothed portion opposes an agitator gear. In the second position, the detection protrusion is undetectable by the detecting device and a toothless portion opposes the agitator gear. When the detection gear is in the first position, an urging portion of the housing contacts the detection gear and applies rotational force to urge the gear toothed portion toward the agitator gear. When in the second position, the urging portion contacts the detection gear and regulates the position of the detection gear in the rotational direction to cause the toothless portion and the agitator gear to oppose each other.