Abstract: The present invention provides a bean roasting device, comprising: a drum unit comprising a base, a drum pivotally provided in the base and having a receiving space, and a rotation device provided on one side of the base and configured to drive the drum into rotation relative to the base; a heat lamp unit comprising a positioning seat connected to the base, one or a plurality of heat lamp tubes connected at one end to the positioning seat and extending into the receiving space, and one or a plurality of air inlet ducts each provided around a said heat lamp tube and configured to guide air into the receiving space of the drum; and an air supply/venting unit provided on one side of the base, the air supply/venting unit comprising an air guiding portion in communication with the receiving space of the drum and an air blower/air extractor provided on one side of the air guiding portion and configured to provide a positive pressure/negative pressure to the receiving space of the drum through the air guiding portio

Abstract: The present invention provides a bean roasting device, comprising: a drum unit comprising a base, a drum pivotally provided in the base and having a receiving space, and a rotation device provided on one side of the base and configured to drive the drum into rotation relative to the base; a heat lamp unit comprising a positioning seat connected to the base, one or a plurality of heat lamp tubes connected at one end to the positioning seat and extending into the receiving space, and one or a plurality of air inlet ducts each provided around a said heat lamp tube and configured to guide air into the receiving space of the drum; and an air supply/venting unit provided on one side of the base, the air supply/venting unit comprising an air guiding portion in communication with the receiving space of the drum and an air blower/air extractor provided on one side of the air guiding portion and configured to provide a positive pressure/negative pressure to the receiving space of the drum through the air guiding portio

Abstract: A waterproof keyboard is provided, which has keys, scissor frames, elastic layer bodies, a membrane circuit board, a support plate and a bottom plate, wherein the bottom board is disposed with a plurality of stamped nodes, which are corresponded by apertures disposed on the support plate. The means of riveting is used for riveting the bottom plate and the support plate, such that no apertures can be found on the bottom plate, so as to prevent liquids poured on the keyboard by accident from infiltrating down to the motherboard underneath the bottom plate, thus assuring that the motherboard is not damaged thereby. As a result, the computer can be kept operable. Also the membrane circuit board is mounted on top of the support plate, thus rendering the overall structural assembly easier and such overall structure more stable.

Abstract: A waterproof keyboard is provided, which has keys, scissor frames, elastic layer bodies, a membrane circuit board, a support plate and a bottom plate, wherein the bottom board is disposed with a plurality of stamped nodes, which are corresponded by apertures disposed on the support plate. The means of riveting is used for riveting the bottom plate and the support plate, such that no apertures can be found on the bottom plate, so as to prevent liquids poured on the keyboard by accident from infiltrating down to the motherboard underneath the bottom plate, thus assuring that the motherboard is not damaged thereby. As a result, the computer can be kept operable. Also the membrane circuit board is mounted on top of the support plate, thus rendering the overall structural assembly easier and such overall structure more stable.