Abstract:
[Object] To provide a clutch apparatus that can smoothly switch from a clutch engaged state to a clutch non-engaged state, while tooth jump does not occur even with a small-sized clutch apparatus.[Solving Means] A recessed portion 153 is provided in a cam face of a cam 45. A cam shaft 13 is configured to pivot by a predetermined amount as a cam follower 51 is fitted in the recessed portion, and, when the cam initiates to engage the cam follower, it enters a clutch engaged state. A driven side gear 99 is pivoted by a predetermined amount as the cam follower is fitted in the recessed portion and, thereby, a clutch member 93 is rotated by a predetermined amount in a direction in which a toothed portion 94 is spaced apart from a drive side gear 92. In a state where the cam follower is not fitted in the recessed portion, when the clutch member 93 switches its clutch state, at least a portion of a swing locus of the toothed portion 94 of the clutch member 93 maintains a clearance with a gear tooth of the drive side gear 92.
Abstract:
There is a reflective layer covering almost the entire surface of the light emitting portion except the portions where the light emitting elements are arranged, it is possible to increase the reflectivity of the light emitting portion to realize a higher luminance. In addition, the heat generated from the light emitting elements can be dissipated through the reflective layer, so that it is possible to prevent overheat of the light emitting device, and it is thus possible to improve the reliability of the light emitting device.
Abstract:
A medium feed device has a configuration in which a feed section is provided to send a medium in the front-and-back direction of the medium feed device, the device includes a guide member which guides the medium in the back face side of the medium feed device, the guide member is provided to be capable of being extended and contracted in a direction connecting the base end side and the free-end side of the guide member, and the guide member forms a feed pathway for a the medium which is held to have a roll shape which is sent further from the back face side than the guide member, in a first state where the guide member is contracted, and forms a feed pathway for a fed medium of a single sheet shape which is sent from the guide member, in a second state where the guide member is extended.
Abstract:
Disclosed is an electrophotographic photoreceptor which is excellent in wear resistance and electrical characteristics. Specifically disclosed is an electrophotographic photoreceptor containing a polyester resin in a photosensitive layer provided on an electroconductive substrate. The polyester resin is composed of a copolymer represented by the general formula 1 below, which has a viscosity average molecular weight (Mv) of 10,000-300,000 and contains a diphenyl ether 4,4′-dicarboxylic acid component and a bivalent phenol component. In the general formula 1, A represents a diphenyl ether 4,4′-dicarboxylic acid residue represented by the formula A below, and B represents a bivalent phenol residue represented by the formula B below. In the formula A, each of Ra1 and Ra2 independently represents a hydrogen atom or a monovalent substituent which may have a substituent, and each of n and m is independently an integer from 0 to 4. In the formula B, each of R1 and R2 independently represents one selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, a halogen group, and an alkoxy group.
Abstract:
Disclosed is an electrophotographic photoreceptor which is excellent in wear resistance and electrical characteristics. Specifically disclosed is an electrophotographic photoreceptor containing a polyester resin in a photosensitive layer provided on an electroconductive substrate. The polyester resin is composed of a copolymer of formula (4), which has a viscosity average molecular weight (Mv) of 10,000-300,000 and contains a diphenyl ether 4,4′-dicarboxylic acid component and a bivalent phenol component. A represents a diphenyl ether 4,4′-dicarboxylic acid residue of formula (A), and E represents a bivalent phenol residue of formula (E). In formula (A), each of Ra1 and Ra2 independently represents a hydrogen atom or a monovalent substituent which may have a substituent, and each of n and m is independently an integer from 0 to 4. In the formula (E), each of R5 and R6 independently represents one selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, a halogen group, and an alkoxy group.
Abstract translation:公开了耐磨性和电特性优异的电子照相感光体。 具体公开了一种在设置在导电性基体上的感光层中含有聚酯树脂的电子照相感光体。 聚酯树脂由式(4)的共聚物组成,其粘度平均分子量(Mv)为10,000-300,000,并含有二苯醚4,4'-二羧酸组分和二价苯酚组分。 A表示式(A)的二苯醚4,4'-二羧酸残基,E表示式(E)的二价酚残基。 在式(A)中,Ra1和Ra2各自独立地表示氢原子或可以具有取代基的一价取代基,n和m各自独立地为0〜4的整数。在式(E)中, R 5和R 6独立地表示选自氢原子,烷基,芳基,卤素基和烷氧基中的一个。