Abstract: A device to sense degree of twist in a screwdriver and the magnitude of force applied includes a contacting portion, a deformation portion, a sensing portion, and a processor. The contacting portion receives a grip and twist pressure through the deformation portion which is tiltedly fixed to the contacting portion. The deformation portion carries the sensing portion and elastically deforms under the force and/or the torsion. The sensing portion detects a deformation of the deformation portion and generates a corresponding electrical signal. The processor receives the signal and determines the values of the twist caused and the force applied.

Abstract: A speed reducer includes an input shaft, an output shaft, and a gear assembly coupled to the input shaft. The gear assembly includes a housing, an external gear, and at least two internal gears. The external gear is located within the housing and inscribes the at least two internal gears. One side of the at least two internal gears is rotatably coupled to the input shaft, and another side of the at least two internal gears is coupled to a connecting column of the output shaft. The at least two internal gears are offset on the input shaft, and the input shaft drives the at least two internal gears to maintain engagement with the external gear. The connecting column maintains transmission of the output shaft and the at least two internal gears.

Abstract: A device to sense degree of twist in a screwdriver and the magnitude of force applied includes a contacting portion, a deformation portion, a sensing portion, and a processor. The contacting portion receives a grip and twist pressure through the deformation portion which is tiltedly fixed to the contacting portion. The deformation portion carries the sensing portion and elastically deforms under the force and/or the torsion. The sensing portion detects a deformation of the deformation portion and generates a corresponding electrical signal. The processor receives the signal and determines the values of the twist caused and the force applied.

Abstract: A speed reducer includes an input shaft, an output shaft, and a gear assembly coupled to the input shaft. The gear assembly includes a housing, an external gear, and at least two internal gears. The external gear is located within the housing and inscribes the at least two internal gears. One side of the at least two internal gears is rotatably coupled to the input shaft, and another side of the at least two internal gears is coupled to a connecting column of the output shaft. The at least two internal gears are offset on the input shaft, and the input shaft drives the at least two internal gears to maintain engagement with the external gear. The connecting column maintains transmission of the output shaft and the at least two internal gears.

Abstract: A machine for testing the parts and functions of a mobile phone includes a supporting mechanism, a platform, a receiving portion, and a detecting mechanism. The supporting mechanism is mounted in a box. The platform is slidably mounted on the supporting mechanism. The receiving portion is used to receive the mobile phone. The receiving portion is rotatably mounted on the platform. Devices within the machine are operated to test the mobile phone. A mobile phone testing system used in the testing machine is also described.

Abstract: A machine for testing the parts and functions of a mobile phone includes a supporting mechanism, a platform, a receiving portion, and a detecting mechanism. The supporting mechanism is mounted in a box. The platform is slidably mounted on the supporting mechanism. The receiving portion is used to receive the mobile phone. The receiving portion is rotatably mounted on the platform. Devices within the machine are operated to test the mobile phone. A mobile phone testing system used in the testing machine is also described.