摘要:
An scanning unit scanner includes a light source and a polygon mirror unit. A front-to-rear rib is disposed between the light source and the polygon mirror unit and near the polygon mirror unit. An input side opening having a slit shape is formed as a cutout in the top edge of the front-to-rear rib. When laser light from the light source passes through the input side opening, the input side opening restricts the width of the light in a main scanning direction.
摘要:
A power module base includes a heat radiation substrate formed of a high-thermal-conduction material, an insulating substrate joined to an upper surface of the heat radiation substrate, a wiring layer provided on an upper surface of the insulating substrate, and a heat radiation fin joined to a lower surface of the heat radiation substrate. A component attachment plate thicker than the heat radiation substrate and including a through hole for accommodating the insulating substrate is joined to the upper surface of the heat radiation substrate such that the insulating substrate is located within the through hole. This power module base can maintain the upper surface of the component attachment plate flat, and various components required for a power module, such as a casing, can be attached onto the component attachment plate.
摘要:
A cooling device includes a heat sink having a top plate, a bottom plate spaced from the top plate and fins between the top and bottom plates, a first metal member laminated to the side of the top plate that is opposite from the fins, and a first insulator laminated to the first metal member. The top plate, the bottom plate and the first metal member are each made of a clad metal that is composed of a base metal and a brazing metal, so that the fins are brazed to the top and bottom plates, the first metal member is brazed to the top plate, and the first insulator is brazed to the first metal member.
摘要:
A light scanning device includes: a light source configured to emit a light beam; a deflector configured to deflect and scan the light beam from the light source in a main scanning direction; a driving source that drives the deflector; and a housing including a support wall to which the driving source is fixed. The support wall has a first surface, a second surface to which the driving source is fixed and that is deviated with respect to the first surface in a direction perpendicular to the first surface, and a third surface that connects the first surface and the second surface and is inclined to form obtuse angles relative to the first surface and the second surface.
摘要:
A light scanning apparatus includes: a light source configured to emit a light beam; a deflector configured to deflect and scan the light beam from the light source in a main scanning direction; a control substrate that is configured to control driving of the light source and includes a first connection part to which the light source is connected and a second connection part for connecting an external terminal; and a housing that supports the control substrate. The first connection part is arranged within the housing and the second connection part is exposed and arranged at the outside of the housing.
摘要:
A liquid-cooled-type cooling device includes a casing having a cooling-liquid flow channel. Fins are provided on an inner surface of a top wall of the casing. Each fin has a wavy shape on a horizontal plane perpendicular to a fin height direction. In a left fin of two adjacent fins, lines of intersection between the horizontal plane and right side surfaces of two slant portions connecting two adjacent wave crest portions and a wave trough portion therebetween intersect each other at a first point located on a first straight line. In a right fin, lines of intersection between the horizontal plane and left side surfaces of two slant portions connecting two adjacent wave trough portions and a wave crest portion therebetween intersect each other at a second point located on a second straight line. The first straight line is located on the right fin side of the second straight line.
摘要:
A current detectable transistor T.sub.r comprises a main transistor in which a main current flows and a sense transistor for detecting the current flowing in the main transistor. A sense resistance R.sub.S having a temperature coefficient .alpha..sub.S suitable for maintaining the constancy of a sense voltage V.sub.S regardless of a temperature change .DELTA.T is provided at the emitter of the sense transistor. Because the sense voltage V.sub.S can be measured between the two ends of a sense resistor R.sub.S with little temperature drift, the sense voltage V.sub.S obtained as a detection result remains constant regardless of the temperature change .DELTA.T, thereby enabling a current to be detected with high precision.
摘要:
Disclosed is a heat dissipation device which is reduced in the number of components, while having sufficient insulating function and cooling function with respect to an object to be cooled. The heat dissipation device includes a base that is formed from a ceramic and a refrigerant channel for circulating a refrigerant within the base. The base is formed by sintering a stacked body in which a plurality of ceramic sheets are stacked. The plurality of ceramic sheets include the ceramic sheet which is provided with a plurality of slits that constitute the refrigerant channel, and the ceramic sheets which are provided with communication paths that communicate the refrigerant channel and outside units with each other. A semiconductor device is configured by bonding a metal plate, on which a semiconductor element is mounted, to the heat dissipation device.
摘要:
An image forming apparatus is provided, which includes a housing having a cover swingable around a rotational shaft, and first and second LED heads attached to the cover, a position of the first LED head relative to a first axis line around which a first photoconductive body is rotatable being more shifted toward the rotational shaft in a first direction than a position of the second LED head relative to a second axis line around which a second photoconductive body is rotatable, the first direction being a direction along which the first and second photoconductive bodies are arranged, the first and second axis lines being parallel to a second direction perpendicular to the first direction.
摘要:
A double-sided substrate includes a ceramic substrate, a first metal layer formed on one surface of the ceramic substrate and having a plurality of subsidiary metal layers which are laminated on the surface of the ceramic substrate and whose purities differ from each other and a second metal layer formed on the other surface of the ceramic substrate, wherein the closer to the ceramic substrate any subsidiary metal layer is located, the lower purity the subsidiary metal layer has. Additionally, a semiconductor includes the above double-sided substrate, a power element and a heat sink.