Abstract: The invention relates to a cooling device of print head in 3D printer, including a print head, the print head is set through a slider of the 3D printer by earrings and sliding axially, the cooling device is integrated in the print head. The internal of the housing cavity of print head is provided with a wire transporting mechanism, the axial direction of one side of the housing cavity have set up a cooling fan which is aim at the wire transporting mechanism. The lower part of the housing cavity is provided with a nozzle of the print head, and there is a wind pipe setting into the housing cavity and interconnecting to the nozzles of the print head. The present invention improves the head dissipation of the print head in 3D printer, makes the work space further reduced, and help to improve the portability of the 3D printer.

Abstract: A portable electrical device includes a tablet computer, a base panel, two supporting arms and two connecting members. Two ends of each supporting arm are pivotally disposed at one lateral side of the tablet computer and one lateral side of the base panel. The base panel has two guiding grooves oppositely arranged on one surface thereof. One end of the connecting member is pivoted with the lateral side of the tablet computer, and the other end of the connecting member is limited and slidably disposed in one of the guiding grooves. When the other ends of both the connecting members are at one distal end of the guiding groove, the tablet computer is stacked on the base panel, and a touch-controlled display of the tablet computer can alternatively face towards or opposite to the base panel.

Abstract: A portable electrical device includes a tablet computer, a base panel, two supporting arms and two connecting members. Two ends of each supporting arm are pivotally disposed at one lateral side of the tablet computer and one lateral side of the base panel. The base panel has two guiding grooves oppositely arranged on one surface thereof. One end of the connecting member is pivoted with the lateral side of the tablet computer, and the other end of the connecting member is limited and slidably disposed in one of the guiding grooves. When the other ends of both the connecting members are at one distal end of the guiding groove, the tablet computer is stacked on the base panel, and a touch-controlled display of the tablet computer can alternatively face towards or opposite to the base panel.

Abstract: A collapsing device for a desk includes a main frame provided with two longitudinal rods respectively disposed with projections and a pivotal hole. Two guide frames are respectively fixed at opposite upper corners of a front plate and bored with a through channel extending backward and slanting upward to correspond with the pivotal hole. Two pivotal wheels are respectively received in the guide frames and actuated to shift therein, and two leg frames are pivotally assembled between the rear side of the front plate and the guide frames, respectively having an upper side bored with plural fitting slots. Thus, when the longitudinal rods are pivotally turned downward or upward by the pivotal wheels, with the projections of the longitudinal rods respectively fitted in or pulled out of the fitting slots of the leg frames, the desk can be stretched or collapsed.

Abstract: The invention discloses an angle adjusting device for wall mounted type display apparatus, including a fixing bracket fixed on the wall or a support structure, a device fastening frame, which is fixed on the back of the wall mounted display apparatus, the fixing bracket being pivotably connected to a lower end of the device fastening frame, an angle adjusting member having a predetermined rotation resistance with one end pivotably connected to the fixing bracket and the other end pivotably connected to the device fastening frame, and a balancing tension spring with one end connected to the fixing bracket and the other end connected to the device fastening frame. In use, a small force is applied directly to the wall mounted display apparatus or the angle adjusting device to precisely adjust the angle of the display apparatus according to users' needs without removing the display apparatus.