Abstract: A detection circuit is provided herein, which includes a first transistor, a second transistor, a third transistor, a light sensor, a capacitor, and a fourth transistor. The first transistor has a control terminal, a first terminal, and a second terminal. The second transistor is coupled to the control terminal. The third transistor is coupled to the control terminal and the second terminal. The light sensor is coupled to the control terminal. The capacitor is coupled to the control terminal. The fourth transistor is coupled to the second terminal.

Abstract: A treadmill roller structure comprises a motor, a gear set and a case. The motor is an out-runner motor. The power output section of the motor rotates about stationary spindle. The rotary power output section is engaged to the gear set, while the gear set is in turn engaged to the case, thus allowing the case to rotate relatively to the spindle of the motor as well. The roller structure does not require a driving belt to transfer power from the motor to the roller, thus reduces the power loss due to frictional force during power transfer through belt driving, which enhances the performance of the motor and offers a space-saving feature. In addition, the instant disclosure also provides a treadmill.

Abstract: A treadmill roller structure comprises a motor, a gear set and a case. The motor is an out-runner motor. The power output section of the motor rotates about stationary spindle. The rotary power output section is engaged to the gear set, while the gear set is in turn engaged to the case, thus allowing the case to rotate relatively to the spindle of the motor as well. The roller structure does not require a driving belt to transfer power from the motor to the roller, thus reduces the power loss due to frictional force during power transfer through belt driving, which enhances the performance of the motor and offers a space-saving feature. In addition, the instant disclosure also provides a treadmill.

Abstract: A treadmill roller structure comprises a motor, a gear set and a case. The motor is an out-runner motor. The power output section of the motor rotates about stationary spindle. The rotary power output section is engaged to the gear set, while the gear set is in turn engaged to the case, thus allowing the case to rotate relatively to the spindle of the motor as well. The roller structure does not require a driving belt to transfer power from the motor to the roller, thus reduces the power loss due to frictional force during power transfer through belt driving, which enhances the performance of the motor and offers a space-saving feature. In addition, the instant disclosure also provides a treadmill.

Abstract: A treadmill roller structure comprises a motor, a gear set and a case. The motor is an out-runner motor. The power output section of the motor rotates about stationary spindle. The rotary power output section is engaged to the gear set, while the gear set is in turn engaged to the case, thus allowing the case to rotate relatively to the spindle of the motor as well. The roller structure does not require a driving belt to transfer power from the motor to the roller, thus reduces the power loss due to frictional force during power transfer through belt driving, which enhances the performance of the motor and offers a space-saving feature. In addition, the instant disclosure also provides a treadmill.

Abstract: A building block system includes sphere assemblies of four predetermined shapes. Each of the predetermined shapes is formed by two or more spheres. To play with the building block system, the sphere assemblies totally include fourteen spheres are to be posed vertically or horizontally to form a three-layer pyramid on a square seat region composed of nine spherical recesses.

Abstract: The present invention disclose a video/audio signal transmission cable comprising a first and a second conducting wires respectively having conductor and insulator, and the first and second conducting wires are neighborly installed, wherein each conductor has a core being made of steel material and being electroplated with a high conductive metal plating layer on the outside surface thereof; a first enclosing layer being made of insulation material is used to enclose the outsides of the first and second conducting wires; and a second enclosing layer being made of insulation material is used to enclose the outside of the first enclosing layer. It is then through the material characteristics of the core and high conducting metal plating layer to have the signal equalization effect during high frequency and low frequency transmissions thereby achieving the better quality and stable transmission effect.

Abstract: The present invention provides an improved cable structure, which comprising: a first conductor; a second conductor at one side of the first conductor; a coating unit covered externally onto the first and second conductors, so that the central distance of the first and second conductors is a stable distance; moreover, one surface of the coating unit is provided with a plane portion, and the other surface provided with a depressed portion between the first and second conductors. Thus, the cable could be used to balance efficiently the impedance and realize zero delay difference during HF signal transmission.

Abstract: A concentric machining device for a roller includes a movable upper base, a stationary lower base, two movable mold seats, two slide rods and four first hydraulic cylinders. Each of the mold seats has a forming mold inside, the forming mold has a fitting hole with an enlarged conical opening at the front side thereof, a locating shaft is received in the forming mold of the first mold seat and penetrates the fitting hole thereof and the first cylinder member, a clamping shaft is received in the forming mold of the second mold seat and penetrates the fitting hole thereof and the second hydraulic cylinder to connect with the fourth hydraulic cylinder. The roller is held by the bases and the shafts via two of the hydraulic cylinders and both ends of the roller are machined by the forming molds in the mold seats to provide squeezed and shrunk shapes once the mold seats are actuated by the other two hydraulic cylinders.

Abstract: A concentric machining device for a roller includes a movable upper base, a stationary lower base, two movable mold seats, two slide rods and four first hydraulic cylinders. Each of the mold seats has a forming mold inside, the forming mold has a fitting hole with an enlarged conical opening at the front side thereof, a locating shaft is received in the forming mold of the first mold seat and penetrates the fitting hole thereof and the first cylinder member, a clamping shaft is received in the forming mold of the second mold seat and penetrates the fitting hole thereof and the second hydraulic cylinder to connect with the fourth hydraulic cylinder. The roller is held by the bases and the shafts via two of the hydraulic cylinders and both ends of the roller are machined by the forming molds in the mold seats to provide squeezed and shrunk shapes once the mold seats are actuated by the other two hydraulic cylinders.

Abstract: A geometric plate having a flexible coupling frame, comprises at least two geometric plate elements, wherein said geometric plate element is a planar plate of a geometric shape having at least three sides, and a latch recession disposed on each side of such geometric plate element; wherein both sidewalls in the latch recession have a protruding hinge pip; a connecting bar having a length slightly longer than the recession and a pair of connecting sections respectively disposed on both ends; a latch recession disposed at a position corresponding to the connecting section on both ends of the connecting bar; the recession and both ends of the connecting bar use the protruding hinge pip and latch recession to define a pivotal motion relation. The geometric plate comprises a through hole at each corner such that each corner forms a flexible frame, and such flexible frame can adapt various changes and provide a space for the latch recession to extended flexibly outward.

Abstract: A toy element set for constructional toy includes square planar elements, each square planar element having a center through hole, coupling elements adapted to connect square planar elements on a plane or at right angles, and gears, each gear having a split shaft pivotally connectable to the through hole of one planar element, the diameter of the pitch circle of the gears being equal to the length of the diagonal of the planar elements, each gear having a spacer flange at the inner side around the shaft and adapted to space the gear face of the respective gear from the corresponding planar element upon installation of the respective gear in the planar element.

Abstract: A geometric construction system includes at least two substantially flat panels and at least a connecting rod. Each panel has a plurality of side edges, each of which has two opposite end sections and a basin section that extends between and inwardly relative to the end sections and that has two opposite end faces. The connecting rod has at least two interconnected connecting portions, each of which is complementary to and is received in the basin section. Each connecting portion has two opposite ends respectively pivoted on the end faces so as to permit each panel to be freely turnable about an axis.

Abstract: A geometric construction system includes at least a coupling lever and at least two substantially flat frames of equilateral polygonal shape, each of which defines a frame space therein and each of which includes equilateral side portions that confine the frame space, and pivotal parts that are disposed within the frame space and that are connected to the side portions. The coupling lever has two opposite pivotal ends respectively pivoted to a selected one of the pivotal parts of one of the frames and a selected one of the pivotal parts of the other one of the frames so as to permit the frames to be turnable relative to the coupling lever.

Abstract: A geometric construction system includes at least a coupling lever and at least two substantially flat frames of equilateral polygonal shape, each of which defines a frame space therein and each of which includes equilateral side portions that confine the frame space, and pivotal parts that are disposed within the frame space and that are connected to the side portions. The coupling lever has two opposite pivotal ends respectively pivoted to a selected one of the pivotal parts of one of the frames and a selected one of the pivotal parts of the other one of the frames so as to permit the frames to be turnable relative to the coupling lever.

Abstract: A geometric construction system includes at least two substantially flat panels and at least a connecting rod. Each panel has a frame piece and a pair of cover sheets. The frame piece has side walls with side edges, each of which has a basin section, and further has an inner face defining a central opening. The inner face is formed with a flange that cooperates with the inner face to define a pair of retaining grooves. The connecting rod has at least two interconnected connecting portions, each of which is complementary to and is received in the basin section. The cover sheets are respectively and fittingly received in the retaining grooves.

Abstract: A geometric construction system includes at least two panels which are sidewisely and pivotally coupled together. Each of the panels has a plurality of side edges, a central opening confined by the side edges, a supporting plate received in the central opening, and a plurality of retaining plates laterally protruding from inner walls of the side edges into the central opening and cooperating with the supporting plate so as to form a plurality of retaining slots. Flexible patterned sheets are received in the central openings in the two panels. Each sheet has engaging portions respectively extending into and engaging releasably the retaining slots so as to be detachably retained in the central opening in the respective one of the panels.

Abstract: A geometric construction system includes at least two substantially flat panels and at least a connecting rod. Each panel has a plurality of side edges, each of which has two opposite end sections and a basin section that extends between and inwardly relative to the end sections and that has two opposite end faces. The connecting rod has at least two interconnected connecting portions, each of which is complementary to and is received in the basin section. Each connecting portion has two opposite ends respectively pivoted on the end faces so as to permit each panel to be freely turnable about an axis.

Abstract: A geometric construction system includes at least two substantially flat panels and at least a connecting rod. Each panel has a plurality of side edges, each of which has two opposite end sections and a basin section that extends between and inwardly relative to the end sections and that has two opposite end faces. The connecting rod has at least two interconnected connecting portions, each of which is complementary to and is received in the basin section. Each connecting portion has two opposite ends respectively pivoted on the end faces so as to permit each panel to be freely turnable about an axis. At least two toothed wheel members are respectively and rotatably mounted on said panels, and mesh with each other.

Abstract: A geometric construction system includes at least two substantially flat panels and at least a connecting rod. Each panel has a frame piece and a pair of cover sheets. The frame piece has side walls with side edges, each of which has a basin section, and further has an inner face defining a central opening. The inner face is formed with a flange that cooperates with the inner face to define a pair of retaining grooves. The connecting rod has at least two interconnected connecting portions, each of which is complementary to and is received in the basin section. The cover sheets are respectively and fittingly received in the retaining grooves.