Abstract: A valve stem structure disposed at a rim of a tire of a vehicle for connecting to an electronic tire pressure monitoring device in the tire is provided. The valve stem structure includes a tube, an air core, and a conducting wire. The tube has a first inlet, a first outlet communicating with an inner space of the tire, and a second outlet. The air core is switchably disposed at the first inlet, and a compressed air is injected into the tire via the first inlet and the first outlet by switching the air core. The conducting wire is disposed in the tube, and an end of the conducting wire extends out of the tube via the second outlet to be electrically connected to the electronic tire pressure monitoring device. A power source charges the electronic tire pressure monitoring device via the conducting wire.

Abstract: A valve stem structure disposed at a rim of a tire of a vehicle for connecting to an electronic tire pressure monitoring device in the tire is provided. The valve stem structure includes a tube, an air core, and a conducting wire. The tube has a first inlet, a first outlet communicating with an inner space of the tire, and a second outlet. The air core is switchably disposed at the first inlet, and a compressed air is injected into the tire via the first inlet and the first outlet by switching the air core. The conducting wire is disposed in the tube, and an end of the conducting wire extends out of the tube via the second outlet to be electrically connected to the electronic tire pressure monitoring device. A power source charges the electronic tire pressure monitoring device via the conducting wire.

Abstract: The present invention discloses an angle adjusting structure for a Cartesian robot arm, comprising an angle adjusting element, a base, and a clamp. A motor transmission unit is disposed on the base, and an upper pulley, a lower pulley and a driving wheel are disposed on the base adjacent to the angle adjusting element. The driving wheel is connected to the motor transmission unit. The upper and lower pulleys clamp the angle adjusting element, and a drive belt is wound around peripheries of the upper pulley and the driving wheel. The clamp is secured to a face of the angle adjusting element opposite to the base, and a glue dispensing needle is disposed at one end of the clamp. The motor transmission unit rotates the driving wheel to drive the drive belt, so that the angle adjusting element is displaced and thus to change a glue dispensing angle.