Abstract: A sheet conveying apparatus includes a conveyance unit to convey a sheet, a support frame supporting the he conveyance unit and having a mounting member, and an exterior cover made of metal and fixed to the mounting member by a screw. The exterior cover covers the support frame on a back side of the sheet conveying apparatus and includes a hook portion provided above a position corresponding to the mounting member in a vertical direction, and a positioning pin provided below the position corresponding to the mounting member in the vertical direction. The support frame includes an engagement portion, engaged with the hook portion and provided at a position above the mounting member in the vertical direction, and a through-hole, formed at a position below the mounting member in the vertical direction, into which the positioning pin is inserted to position the exterior cover with respect to the support frame.

Abstract: A metal frame of an image forming apparatus including an image forming unit which forms an image on a sheet, comprising: a first support which supports the image forming unit; and a second support which is arranged with an interval from the first support and supports the image forming unit together with the first support; wherein the second support includes: a first sheet metal which includes a first flat surface portion in which a through-hole is formed and a bent and raised portion which is bent and raised from the first flat surface portion at a position adjacent to the through-hole, and a second sheet metal which is supported to the first sheet metal on the first sheet metal and includes a second flat surface portion which is sandwiched between the first flat surface portion and the bent and raised portion and a protruded portion which protrudes from the second flat surface portion in a plate thickness direction of the second flat surface portion at a position overlapping with the through-hole in a ver

Abstract: A metal frame of an image forming apparatus including an image forming unit which forms an image on a sheet, comprising: a first support which supports the image forming unit; and a second support which is arranged with an interval from the first support and supports the image forming unit together with the first support; wherein the second support includes: a first sheet metal which includes a first flat surface portion in which a through-hole is formed and a bent and raised portion which is bent and raised from the first flat surface portion at a position adjacent to the through-hole, and a second sheet metal which is supported to the first sheet metal on the first sheet metal and includes a second flat surface portion which is sandwiched between the first flat surface portion and the bent and raised portion and a protruded portion which protrudes from the second flat surface portion in a plate thickness direction of the second flat surface portion at a position overlapping with the through-hole in a ver

Abstract: A sheet conveying apparatus includes a conveyance unit to convey a sheet, a support frame supporting the he conveyance unit and having a mounting member, and an exterior cover made of metal and fixed to the mounting member by a screw. The exterior cover covers the support frame on a back side of the sheet conveying apparatus and includes a hook portion provided above a position corresponding to the mounting member in a vertical direction, and a positioning pin provided below the position corresponding to the mounting member in the vertical direction. The support frame includes an engagement portion, engaged with the hook portion and provided at a position above the mounting member in the vertical direction, and a through-hole, formed at a position below the mounting member in the vertical direction, into which the positioning pin is inserted to position the exterior cover with respect to the support frame.

Abstract: A metal frame of an image forming apparatus includes first and second spaced-apart supports which together support an image forming unit of the image forming apparatus. The second support includes first and second metal sheets wherein the first sheet metal includes a first flat surface portion in which a through-hole is formed and a bent and raised portion which is bent and raised from the first flat surface portion at a position adjacent to the through-hole, and wherein the second sheet metal is supported to the first sheet metal and includes a second flat surface portion which is sandwiched between the first flat surface portion and the bent and raised portion, and a protruded portion which protrudes from the second flat surface portion in a plate thickness direction of the second flat surface portion at a position overlapping with the through-hole in a vertical direction.

Abstract: A metal frame of an image forming apparatus including an image forming unit which forms an image on a sheet, comprising: a first support which supports the image forming unit; and a second support which is arranged with an interval from the first support and supports the image forming unit together with the first support; wherein the second support includes: a first sheet metal which includes a first flat surface portion in which a through-hole is formed and a bent and raised portion which is bent and raised from the first flat surface portion at a position adjacent to the through-hole, and a second sheet metal which is supported to the first sheet metal on the first sheet metal and includes a second flat surface portion which is sandwiched between the first flat surface portion and the bent and raised portion and a protruded portion which protrudes from the second flat surface portion in a plate thickness direction of the second flat surface portion at a position overlapping with the through-hole in a ver

Abstract: A coil spring 60 is provided in an empty room (inside of a fixing roller 50) of a main body 52 of a roller. The coil spring 60 is in contact with an inside wall 52a surrounding the empty room of the roller main body 52 and pushes the inside wall 52a outward. The coil spring 60 and the inside wall face 52a are coated with a black film 66 except the contact portion 62 of the coil spring 60 and the inside wall 52a.

Abstract: A coil spring 60 is provided in an empty room (inside of a fixing roller 50) of a main body 52 of a roller. The coil spring 60 is in contact with an inside wall 52a surrounding the empty room of the roller main body 52 and pushes the inside wall 52a outward. The coil spring 60 and the inside wall face 52a are coated with a black film 66 except the contact portion 62 of the coil spring 60 and the inside wall 52a.

Abstract: A coil spring 60 is provided in an empty room (inside of a fixing roller 50) of a main body 52 of a roller. The coil spring 60 is in contact with an inside wall 52a surrounding the empty room of the roller main body 52 and pushes the inside wall 52a outward. The coil spring 60 and the inside wall face 52a are coated with a black film 66 except the contact portion 62 of the coil spring 60 and the inside wall 52a.

Abstract: A Bi-CMOS logic gate circuit according to the present invention comprises a complementary Bi-CMOS output circuit at the output stage composed of a first-polarity bipolar transistor and a second-polarity bipolar transistor, and a level compensation circuit, provided between the input and output terminals of the Bi-CMOS output circuit, which compensates for each forward-bias voltage between the base and emitter of the first-polarity and second-polarity bipolar transistors. This arrangement allows the Bi-CMOS output circuit to swing the output voltage from the voltage of the high-voltage supply to that of the low-voltage supply at the output stage, previously smaller in the amplitude by the amount equal to the sum of the base-emitter voltage of two bipolar transistors.

Abstract: An interface circuit includes a power source terminal, an input terminal and NPN transistor. Th interface circuit further includes a first resistor connected between the emitter of the NPN transistor and the input terminal, a second resistor connected between the collector of the NPN transistor and the power source terminal, a diode connected in a forward direction between the collector of the NPN transistor and the power source terminal and a voltage dividing circuit for biasing the base of the NPN transistor to a preset potential.

Abstract: A logic circuit outputs state signals of seven different kinds, on the basis of first, second and third digital signals. A first composite gate circuit outputs a logical OR among the first to third digital signals as a first state signal. A first gate circuit outputs a logical OR between the second and third digital signals as a second state signal. A second composite gate circuit is supplied with a logical AND between the first and second digital signals, and outputs a logical OR between the supplied logical AND and the third digital signal as third state signal. A third composite gate circuit is supplied with a logical OR between the first and second digital signals, and outputs a logical AND between the supplied logical OR and the third digital signal as a fifth state signal. A second gate circuit outputs a logical AND between the second and third digital signals as a sixth state signal.

Abstract: A voltage level converting circuit includes first and second potential terminals between which a power source voltage is applied, first and second terminals for receiving an input signal and an inverted input signal, a differential amplifier including npn transistors whose conduction states are controlled by the input signal and the inverted input signal, and an output circuit for generating an output logic signal corresponding to the output voltage of the differential amplifier. The output circuit of this voltage level converting circuit has a current path connected in series between the first and second potential terminals by way of a constant current source, and includes a MOS transistor whose conduction state is controlled by the output voltage of the differential amplifier.