Abstract: A telescoping structure includes a hollow outer section and a hollow inner section slidably mounted in the hollow outer section. The hollow outer section includes a first sidewall, a second sidewall and a third sidewall. The hollow inner section includes a fourth sidewall, a fifth sidewall and a sixth sidewall. A pair of sliding rails is disposed on the interior side of the first sidewall and a pair of raised sliding grooves is defined on the exterior side of the fourth sidewall. The pair of raised sliding grooves engages with the pair of sliding rails to enable a sliding movement of the hollow inner section relative to the hollow outer section.

Abstract: A telescoping structure includes a hollow outer section and a hollow inner section slidably mounted in the hollow outer section. The hollow outer section includes a first sidewall, a second sidewall and a third sidewall. The hollow inner section includes a fourth sidewall, a fifth sidewall and a sixth sidewall. A pair of sliding rails is disposed on the interior side of the first sidewall and a pair of raised sliding grooves is defined on the exterior side of the fourth sidewall. The pair of raised sliding grooves engages with the pair of sliding rails to enable a sliding movement of the hollow inner section relative to the hollow outer section.

Abstract: A three-dimensional printer includes an inkjet head and a nozzle plate. The inkjet head includes a top wall and two sidewalls connecting with the top wall. The top wall of the inkjet head includes a top nozzle. Each sidewall includes a side nozzle. The nozzle plate is positioned on an inner surface of the inkjet head. The nozzle plate includes a top area and two opposite side areas connecting with the top area. The top area of the nozzle plate includes a plurality of holes corresponding to the top nozzle of the inkjet head. Each side area of the nozzle plate includes a plurality of holes corresponding to the side nozzle of the inkjet head.

Abstract: A three-dimensional printing device includes a top bracket, a side bracket, and a pivoting member. The top bracket includes a pair of sidewalls cooperatively defining a receiving space to receive an inkjet head. The side bracket includes a pair of sidewalls cooperatively defining a receiving space to receive the top bracket. The pivoting member includes a pair of sidewalls cooperatively defining a receiving space to receive an inkjet head. The pivoting member is rotatably mounted in the receiving space of the side bracket.

Abstract: A printing device for printing work pieces includes a main body, an ink jet mounted on the main body, a recycling pan below the ink jet, a driving assembly positioned on the main body for driving the recycling pan, a controller for controlling the driving assembly and a sensor for detecting a work piece and sending a result to the controller. The controller directs the driving assembly to move the recycling pan below the ink jet to receive ink from the ink jet when the work piece is no longer present.

Abstract: A manual fork truck using a tightening device is disclosed. The tightening device applied to a manual fork truck, comprises a tightening rod; a fixing portion on one end of the tightening rod; and a plurality of tightening assemblies separately assembled to the tightening rod axially; each of the plurality of tightening assemblies comprising at least one tightening arm on the tightening rod, and a tightening belt having one end connected to the at least one tightening arm.

Abstract: A print head includes a nozzle plate, a fixing plate fixed to the nozzle plate, an oscillation sheet, and a security assembly. The fixing plate defines a receiving groove. The oscillation sheet is fixed between the fixing plate and the nozzle plate and covers the receiving groove. The security assembly includes a fixing component, an elastic component, a fixing element, an anti-detachable component, and a pointed tip extending from a distal end of the anti-detachable component. The security assembly is fixed to the fixing plate, the elastic component and the anti-detachable component are received in the receiving groove with the pointed tip pointed towards the oscillation sheet. A first end of the compressed elastic component resists against the fixing component and a second end of the elastic component resists the anti-detachable component.

Abstract: A print head includes a nozzle plate, a fixing plate fixed to the nozzle plate, an oscillation sheet, and a security assembly. The fixing plate defines a receiving groove. The oscillation sheet is fixed between the fixing plate and the nozzle plate and covers the receiving groove. The security assembly includes a fixing component, an elastic component, a fixing element, an anti-detachable component, and a pointed tip extending from a distal end of the anti-detachable component. The security assembly is fixed to the fixing plate, the elastic component and the anti-detachable component are received in the receiving groove with the pointed tip pointed towards the oscillation sheet. A first end of the compressed elastic component resists against the fixing component and a second end of the elastic component resists the anti-detachable component.

Abstract: A printing device for printing work pieces includes a main body, an ink jet mounted on the main body, a recycling pan below the ink jet, a driving assembly positioned on the main body for driving the recycling pan, a controller for controlling the driving assembly and a sensor for detecting a work piece and sending a result to the controller. The controller directs the driving assembly to move the recycling pan below the ink jet to receive ink from the ink jet when the work piece is no longer present.

Abstract: A spraying method for forming a coating layer on a surface of a workpiece includes spraying the surface of the workpiece with a liquid coating having a viscosity in a range from about 1 to 8 centipoises, preheating the workpiece at about 60 to 80° C. for about 10 to 90 seconds, heating the workpiece at about 30 to 50° C. for about 1 to 4 minutes, while the surface of the workpiece is inclined at an angle defined between the surface of the workpiece and a horizontal surface of less than 20°, and then drying the workpiece at about 50 to 80° C. for about 5 to 15 minutes.

Abstract: A table system includes a moving table, first and second guide rails extending along a linear path, a first slider positioned between the moving table and the first guide rail including a first revolving assembly, a second slider positioned between the moving table and the second guide rail including a second revolving assembly and a sliding assembly slidably connected to the second revolving assembly, first and second linear actuators to move the first and second sliders. The moving table is rotatably connected to the first guide rail by the first revolving assembly; the sliding assembly is rotatably connected to the second guide rail by the second revolving assembly, and the sliding assembly is slidably connected to the moving table. The first and second linear actuators are selectively actuated to control the movement of the moving table along linear and curved paths.

Abstract: A three-dimensional printing device includes a top bracket, a side bracket, and a pivoting member. The top bracket includes a pair of sidewalls cooperatively defining a receiving space to receive an inkjet head. The side bracket includes a pair of sidewalls cooperatively defining a receiving space to receive the top bracket. The pivoting member includes a pair of sidewalls cooperatively defining a receiving space to receive an inkjet head. The pivoting member is rotatably mounted in the receiving space of the side bracket.

Abstract: A three-dimensional printer includes an inkjet head and a nozzle plate. The inkjet head includes a top wall and two sidewalls connecting with the top wall. The top wall of the inkjet head includes a top nozzle. Each sidewall includes a side nozzle. The nozzle plate is positioned on an inner surface of the inkjet head. The nozzle plate includes a top area and two opposite side areas connecting with the top area. The top area of the nozzle plate includes a plurality of holes corresponding to the top nozzle of the inkjet head. Each side area of the nozzle plate includes a plurality of holes corresponding to the side nozzle of the inkjet head.