Abstract: The present disclosure provides a retractable writing utensil including: a barrel; a writing body; and a knocking member causing a portion of the writing body to protrude and retract from a front end of the barrel by knocking operation of pushing the knocking member forward. The retractable writing utensil includes an interlocking member interlocking with the knocking member, the interlocking member moves forward together with the knocking member by pushing the knocking member forward. The knocking member and the interlocking member are capable of a relative rotation to each other and engaged with each other in a state in which the relative rotation is restricted.

Abstract: An autonomous traveling work apparatus includes traveling wheels, a control unit, a first work unit, and a second work unit. The first work unit includes a first rotary blade assembly rotatably supported by a vehicle body, and the second work unit includes a second rotary blade assembly rotatably supported by the vehicle body. The rotation center of the first rotary blade assembly is oriented in a first direction intersecting the horizontal direction. The rotation center of the second rotary blade assembly is oriented in a second direction intersecting the vertical direction and different from the first direction. The first rotary blade assembly and the second rotary blade assembly are lined up in the front-rear direction of the vehicle body on one of a left side or a right side of the vehicle body.

Abstract: An autonomous traveling work apparatus includes a work unit including a passive rotary cutter that passively rotates, a driving rotary cutter that is driven to rotate, and a fixed cutter that does not rotate. The passive rotary cutter has a rotation axis passing through a rotation center thereof and oriented in a direction intersecting the front-rear direction of a vehicle body, and includes a plurality of blade parts on the outer peripheral portion of the passive rotary cutter. The fixed cutter is adjacent to the passive rotary cutter. The driving rotary cutter has a rotation axis passing through a rotation center thereof and oriented in the direction intersecting the front-rear direction of the vehicle body, and rotates by means of a drive device. The driving rotary cutter cuts the vegetation above the lower end of the passive rotary cutter.

Abstract: An image forming apparatus comprises an image forming unit including a photosensitive drum (image bearing body) 11, and an exposure unit including an exposure head that emits light to expose the photosensitive drum to form a latent image. The exposure unit has a duct unit extending in the X direction (longitudinal direction) of the image forming unit. The duct unit has an inlet opening through which air flows into the duct unit and an outlet opening through which the air is discharged from the duct unit. The exposure unit is provided pivotably about a pivot axis (virtual straight line) passing through the inlet opening.

Abstract: A log-memory access circuit includes a log memory that stores a log; a connection-channel switching unit that switches between a first connection channel that connects a first access apparatus for accessing the log memory and the log memory and a second connection channel that connects a second access apparatus for accessing the log memory and the log memory; a switch input unit that inputs a switching instruction; a switch instruction unit that issues an instruction for switching between the first connection channel and the second connection channel to the connection-channel switching unit, in response to the input switching instruction; a first power supply unit that supplies power from-the first access apparatus to the individual units; and a second power supply unit that supplies power from the second access apparatus to the individual units, when the power of the first power supply unit is turned off.