Abstract: A gear reduction device having a positioning assembly contains: a gear box, a drive motor, an accommodation box, and a braking device. The gear box is connected with the drive motor and accommodates at least one gear set, the braking device is electrically connected with the drive motor, and the accommodation box is disposed outside the drive motor. The positioning assembly is located on a top of the gear reducer and includes a driving gear, a driven gear, a fixing gear, a support plate, a screw rod, and multiple limit switches. The driving gear is connected on the gear box, and the driven gear is fixed on the gear box and meshes with the driving gear. The screw rod is mounted on the support plate, connects with the fixing gear, and meshes with the driven gear. The multiple limit switches are disposed on the support plate.

Abstract: An intraoral scanner includes an image sensor, a projection module, a motion sensor, a memory unit and a processor. The motion sensor senses three motion variations corresponding to three axes according to a motion state of the intraoral scanner. The memory unit stores three first variation thresholds corresponding to the three axes. The processor determines whether the three motion variations are smaller than or equal to the three first variation thresholds, respectively. When the processor determines that at least one of the three motion variations is smaller than or equal to the three first variation thresholds, the processor enables the image sensor and the projection module. When the processor determines that all of the three motion variations are larger than the three first variation thresholds, the processor disables at least one of the image sensor and the projection module.

Abstract: An image display device and image display method. The image display device includes: a plurality of display screens spliced together, a corresponding gravity sensor integrated in each display screen, a logic circuit electrically connected with each display screen and each gravity sensor respectively, and a memory electrically connected with the logic circuit. The gravity sensor determines a placing direction of a corresponding display screen. The logic circuit automatically adjusts an access sequence of the image information in the memory according to the placing directions of the display screens determined by the gravity sensors, and outputs the accessed image information to the corresponding display screens, so that the image display device can normally display images when the display screens are placed right way up and/or placed up side down.

Abstract: A liquid detection system for detecting a liquid level position of a liquid in a hanging bottle includes a hanging bottle casing unit for determining the overall gravity of the hanging bottle, a hanging bottle cap unit for determining the liquid density in the hanging bottle, and a transmission unit for transmitting the overall gravity and liquid density of the hanging bottle to a server, and the server. The server is configured to determine the liquid gravity in the hanging bottle, calculate the liquid volume in the hanging bottle based on the liquid gravity and the liquid density, and determine a liquid level position based on the liquid volume.

Abstract: A warning device used for road safety includes a warning sign and a driving mechanism. The driving mechanism includes a base, a driving unit, at least one wheel, a plurality of supporting units, and a plurality of driving members. The driving unit is accommodated in the base. The at least one wheel is connected to and driven by the driving unit. The plurality of supporting units are movably connected to the base. The plurality of driving members can manipulate the supporting units. Each of the supporting units is movable between a receiving or retracted position and a supporting or extended position. For stability in placement, the device can be lifted a small distance above the road by the supporting units when these are deployed. The driving mechanism is also disclosed.

Abstract: The present disclosure provides a liquid detection system for detecting a liquid level position of a liquid in a hanging bottle. The system includes a hanging bottle casing unit for determining the overall gravity of the hanging bottle, a hanging bottle cap unit for determining the liquid density in the hanging bottle, and a transmission unit for transmitting the overall gravity and liquid density of the hanging bottle to a server, and the server. The server is configured to determine the liquid gravity in the hanging bottle, calculate the liquid volume in the hanging bottle based on the liquid gravity and the liquid density, and determine a liquid level position based on the liquid volume.

Abstract: A warning apparatus includes a processor and a memory. The processor is configured to detect whether there is an object in front of the warning apparatus, calculate, when there is an object detected in front of the warning apparatus, a distance between the object and the warning apparatus, determine whether the calculated distance is less than a safe distance, and control the warning apparatus, when the calculated distance is less than the safe distance, to output a first control signal to control warning equipment to output a first warning.

Abstract: The disclosure provides a public facility system, a user terminal, a server, and an internet of things system, where the public facility system includes a toilet device, a cleaning device, and an information acquisition device; where the information acquisition device is configured to acquire usage status information of the toilet device and/or the cleaning device, and to provide a user with the usage status information.

Abstract: An office seat is disclosed. The office seat includes a seat body; an adjustment mechanism for adjusting a sitting posture of a user by adjusting a state of the seat body, and the adjustment mechanism being provided on the seat body; an image capture device for detecting the contour of the user's body; a controller, the controller being connected to the adjustment mechanism and the image capture device, respectively, and controlling the adjustment mechanism to adjust the seat body according to the detection result of the image capture device. In certain embodiments the office seat may be able to adjust the user's sitting posture, protect the user's physical health, be comfortable in use.

Abstract: A warning device used for road safety includes a warning sign and a driving mechanism. The driving mechanism includes a base, a driving unit, at least one wheel, a plurality of supporting units, and a plurality of driving members. The driving unit is accommodated in the base. The at least one wheel is connected to and driven by the driving unit. The plurality of supporting units are movably connected to the base. The plurality of driving members can manipulate the supporting units. Each of the supporting units is movable between a receiving or retracted position and a supporting or extended position. For stability in placement, the device can be lifted a small distance above the road by the supporting units when these are deployed. The driving mechanism is also disclosed.

Abstract: The present disclosure provides an intelligent closestool including a closestool stand, a closestool seat, a closestool lid, a sensor and a controller. The sensor is configured to sense whether there is an object approaching, or moving away from, the closestool stand, and in the case that there is an object approaching the closestool stand, detect a standing direction of the object relative to the closestool stand. The controller is configured to open/close the closestool lid in the case that the sensor has sensed that the object approaches/moves away from the closestool stand; flip the closestool seat up in the case that the sensor has sensed that the object faces the closestool stand, and flip the closestool seat down in the case that the sensor has sensed that the object turns his or her back to the closestool stand.

Abstract: A self-propelled warning device used for road safety includes a bracket, a warning sign mounted to an upper side of the bracket, and at least one driving mechanism. The driving mechanism includes a supporting leg, a driving unit, and a wheel. The supporting leg includes a receiving portion, the receiving portion defines an accommodating space. The driving unit is accommodated in the accommodating space. The wheel is mounted on the receiving portion and is drivingly connected to the driving unit. The wheel is driven by friction of the driving unit. The driving mechanism is also disclosed.

Abstract: A magnetic isolator includes a dielectric film having a layer of electrically-conductive soft magnetic material bonded thereto. The layer of electrically-conductive soft magnetic material comprises substantially coplanar electrically-conductive soft magnetic islands separated one from another by a network of interconnected gaps. The interconnected gaps are at least partially filled with a thermoset dielectric material. The network of interconnected gaps at least partially suppresses electrical eddy current induced within the layer of soft magnetic material when in the presence of applied external magnetic field. An electronic device including the magnetic isolator and a method of making the magnetic isolator are also disclosed.

Abstract: A traffic warning device includes a reflective warning plate and a foldable driving mechanism. The foldable driving mechanism includes a supporting bracket; a warning sign mounted to an upper side of the supporting bracket, and a plurality of walking or motion units mounted to a lower side of the supporting bracket. Each walking unit includes a supporting leg, a wheel rotatably connected to an end of the supporting leg, and a fastening unit. The other end of the supporting leg is rotatably connected to the supporting bracket. The supporting leg is rotatable between a folded position and a deployed position. The foldable driving mechanism is also disclosed.

Abstract: A system for calculating a distance travelled by a warning device moving towards a required location includes an obtaining module, a first calculating module, a counting module, and a second calculating module. The number of pulses required to turn a motor through one revolution is obtained, and the first calculating module calculates a moving distance of the device per pulse according to the number of pulses and an outer diameter of a wheel. The counting module counts a total pulses issued as the warning device moves from start to finish of a movement. The second calculating module calculates a first moving distance of the warning device according to the total pulses and the distance moved per pulse, also applying rearward image-taking of an object at start and finish of a movement, to confirm calculations. A distance sensing method of the warning device is also provided.

Abstract: A mobile advertisement device for playing back advertisements and advertisement types according to the current crown-sourcing structure information includes a driving module, an image capturing module, a processing module, and a display module. The driving module drives the mobile advertisement device to move. The image capturing module captures a plurality of images. The processing module processes the images to obtain crown-sourcing structure information. The display module plays back certain advertisements or advertisements at certain frequencies according to the crown-sourcing structure information. An advertisement playback system and method are also provided.

Abstract: A mobile warning device on a vehicle includes a detecting module, a driving module, a monitoring module, and a communication module. The detecting module determines whether the vehicle is unexpectedly immobile. The driving module is detachably set on the vehicle to detach and move the warning device to a specified position when the vehicle is immobile. The monitoring module is used to collect information around the vehicle. The communication module is used to transmit signals between the vehicle, the warning device, and a cloud network.

Abstract: The present disclosure provides a liquid detection system for detecting a liquid level position of a liquid in a hanging bottle. The system includes a hanging bottle casing unit for determining the overall gravity of the hanging bottle, a hanging bottle cap unit for determining the liquid density in the hanging bottle, and a transmission unit for transmitting the overall gravity and liquid density of the hanging bottle to a server, and the server. The server is configured to determine the liquid gravity in the hanging bottle, calculate the liquid volume in the hanging bottle based on the liquid gravity and the liquid density, and determine a liquid level position based on the liquid volume.

Abstract: A method for manufacturing a keycap is provided, including the steps of: performing a first shot for injection-molding a first plastic layer which includes a planar face, a back face opposite to the planar face, a closed loop protrusion on the planar face and at least one passage communicating an interior and an exterior of the closed loop protrusion; performing a second shot for injection-molding a second plastic layer which is disposed on the first plastic layer, is different from the first plastic layer in color, includes an inner part within the closed loop protrusion, an outer part outside the closed loop protrusion and a connection portion connected with the inner and outer parts through the at least one passage; removing a part of the connection portion to expose a part of the first plastic layer from the back face of the first plastic layer.

Abstract: A rectifier includes a first diode, a second diode, a first switch and a second switch. Each of the first switch and the second switch includes a controlling pole, a first connecting pole and a second connecting pole. A positive pole of the first diode, the second connecting pole of the first switch, and the controlling pole of the second switch are coupled to a first pole of an alternating current (AC) power. A positive pole of the second diode, the second connecting pole of the second switch, and the controlling pole of the first switch are coupled to a second pole of the AC power. A negative pole of the first diode and a negative pole of the second pole are coupled to an output pole, and the first connecting pole of the first switch and the first connecting pole of the second switch are grounded.