Abstract: An exposure device according to one or more embodiments may include a board on which light emitting elements are arranged; an optical system disposed opposite to the board; and a support member which supports the board and the optical system. The exposure device may further include a cured body disposed on the support member and including a board contact surface to come into contact with the board.

Abstract: An optical print head for illuminating an image carrier facing the optical print head includes: a substrate on which a light emitting element array is mounted; a lens array for focusing light emitted from the light emitting element array onto the image carrier; a holder holding the substrate and the lens array; and at least one spacer member, disposed on the holder, for maintaining a predetermined distance between the lens array and the image carrier, the at least one spacer member being made of curable resin that is cured under a predetermined condition or fixed to the holder with curable adhesive that is cured under a predetermined condition.

Abstract: An optical print head for illuminating an image carrier facing the optical print head includes: a substrate on which a light emitting element array is mounted; a lens array for focusing light emitted from the light emitting element array onto the image carrier; a holder holding the substrate and the lens array; and at least one spacer member, disposed on the holder, for maintaining a predetermined distance between the lens array and the image carrier, the at least one spacer member being made of curable resin that is cured under a predetermined condition or fixed to the holder with curable adhesive that is cured under a predetermined condition.

Abstract: An exposure device includes: a board on which light emitting elements are arranged; an optical system disposed opposite to the board; a support member which supports the board and the optical system; and a cured body disposed on the support member and including a board contact surface to come into contact with the board, wherein the cured body is formed by curing a deformable material.

Abstract: A light exposure unit includes: a board on which to mount light-emitting elements; an optical system configured to cause light emitted from the light-emitting elements to converge; a support member holding the board and the optical system; and a heat sink member configured to dissipate heat from the optical system.

Abstract: A light exposure unit includes: a board on which to mount light-emitting elements; an optical system configured to cause light emitted from the light-emitting elements to converge; a support member holding the board and the optical system; and a heat sink member configured to dissipate heat from the optical system.

Abstract: An image formation apparatus includes: a developer image carrier configured to carry a developer image; a transfer unit provided in contact with the developer image carrier, and configured to transfer the developer image onto a medium which is conveyed along a medium conveyance path and passes through a contact between the developer image carrier and the transfer unit; a blower provided on one of upstream and downstream sides, in a medium conveyance direction, of the contact, and configured to cool the surface temperature of the developer image carrier; and a temperature sensor provided on the other of upstream and downstream sides, in the medium conveyance direction, of the contact, and configured to sense an ambient temperature around the developer image carrier.

Abstract: A medium conveyance device includes a pressed member, a first retention member retaining the pressed member and including a first bias-member retention portion, a press member provided facing the pressed member, a second retention member being provided movable relative to the first retention member and retaining the press member wherein the second retention member includes a second bias-member retention portion, and a bias member provided between the first bias-member retention portion and the second bias-member retention portion and supported at one end thereof by the first bias-member retention portion and at another end thereof by the second bias-member retention portion, thereby pressing the press member against the pressed member.

Abstract: An image formation apparatus includes: a developer image carrier configured to carry a developer image; a transfer unit provided in contact with the developer image carrier, and configured to transfer the developer image onto a medium which is conveyed along a medium conveyance path and passes through a contact between the developer image carrier and the transfer unit; a blower provided on one of upstream and downstream sides, in a medium conveyance direction, of the contact, and configured to cool the surface temperature of the developer image carrier; and a temperature sensor provided on the other of upstream and downstream sides, in the medium conveyance direction, of the contact, and configured to sense an ambient temperature around the developer image carrier.

Abstract: A medium conveyance device includes a pressed member, a first retention member retaining the pressed member and including a first bias-member retention portion, a press member provided facing the pressed member, a second retention member being provided movable relative to the first retention member and retaining the press member wherein the second retention member includes a second bias-member retention portion, and a bias member provided between the first bias-member retention portion and the second bias-member retention portion and supported at one end thereof by the first bias-member retention portion and at another end thereof by the second bias-member retention portion, thereby pressing the press member against the pressed member.

Abstract: A housing engagement structure used for a housing to accommodate therein an apparatus body includes a first housing member and a second housing member. The first housing member includes a first wall having a first overlap portion being an end of the first wall. The second housing member includes: a second wall having a second overlap portion being an end of the second wall configured to be in contact with an inner surface of the first overlap portion and overlapped with the first overlap portion; and a first reinforcement rib projected from the inner surface of the second wall and extending to a position to be in contact with an inner surface of the first wall in the vicinity of the first overlap portion thereby reinforcing the first overlap portion.

Abstract: A sheet guide is rotationally supported by a shaft member to rotate freely on the shaft member. The sheet guide includes a support part that supports the sheet guide on the shaft member, a guide part that contacts sheets and guides sheets in a predetermined direction, and a weight, which has a predetermined weight, is arranged on an opposite side of the support part from the guide part, wherein the weight causes the guide part to rotate to a predetermined position when an external force applied to the guide part is released.

Abstract: A housing engagement structure used for a housing to accommodate therein an apparatus body includes a first housing member and a second housing member. The first housing member includes a first wall having a first overlap portion being an end of the first wall. The second housing member includes: a second wall having a second overlap portion being an end of the second wall configured to be in contact with an inner surface of the first overlap portion and overlapped with the first overlap portion; and a first reinforcement rib projected from the inner surface of the second wall and extending to a position to be in contact with an inner surface of the first wall in the vicinity of the first overlap portion thereby reinforcing the first overlap portion.

Abstract: A sheet guide is rotationally supported by a shaft member to rotate freely on the shaft member. The sheet guide includes a support part that supports the sheet guide on the shaft member, a guide part that contacts sheets and guides sheets in a predetermined direction, and a weight, which has a predetermined weight, is arranged on an opposite side of the support part from the guide part, wherein the weight causes the guide part to rotate to a predetermined position when an external force applied to the guide part is released.