Abstract: A transmission unit comprises a planet carrier, a first hollow planet gear, a second hollow planet gear, a first ring gear, and a second ring gear. The first hollow planet gear with a first module is coupled to the planet carrier through a bearing. The second hollow planet gear with a second module different from the first module is fixed to and moving in synchronization with the first hollow planet gear. The first ring gear encircles and meshes with the first hollow planet gear. The second ring gear encircles and meshes with the second follow planet gear.

Abstract: An engaging device for a wheel is provided. The engaging device includes a wheel hub and a transmitting member. The wheel hub is located in the center of a wheel. The wheel hub has a plurality of engaging holes. The transmitting member has a plurality of grooves, wherein an elastic member is provided in each of the grooves. One end of the elastic member is connected to the groove, and the other end of the elastic member is connected to an engaging member. The shapes of the engaging members and the engaging holes correspond to each other, so that the engaging members fit into the engaging holes.

Abstract: A smart pillow to avoid neck pain and pressure sores and promote healthy sleep includes a body, a processing unit, a plurality of pressure sensors, and a plurality of air bags. The pressure sensors and the air bags are mounted in the body. Each air bag includes a bi-directional valve. The pressure sensors can detect values of pressure on the body and thus the body of a user, and transmit the detected pressure values to the processing unit. The processing unit can control the bi-directional valves of the air bags in accordance with the received pressure values to adjust air amounts of each of the air bags by indrawing or releasing air. The smart pillow guides and supports a user's neck.

Abstract: An unlocking method used in an electronic device includes acquires data as to motion of the electronic device detected by a gyroscope at predetermined intervals when the electronic device is locked. If current motion of the electronic device is caused by a human, according to the acquired motion data and motion data stored in the storage device, a capturing device is controlled to capture an image. Biological characteristics in the acquired image are matched against biological characteristics pre-stored in the storage device, and the electronic device is unlocked when matching biological characteristic is found.

Abstract: A receiving device includes a casing, a guiding member, a rotation member, a key, and a pushrod. The casing includes a baseboard, a first side plate, a second side plate, and a receiving member. The guiding member is received in the receiving member and defines a receiving groove. The rotation member rotatably covers the receiving groove and defines a bump element. The bump element is mounted on the first side plate through a first spring. The key is movably arranged in the casing. The pushrod includes a first end, a second end, and a spindle. The key is driven by an external force to drive the pushrod to rotate about the spindle, and the pushrod drives the rotation member to rotate until the receiving groove is no longer covered, thus the receiving groove is opened.

Abstract: A sensing device and a driving module for an electric bicycle having a spindle are provided. The sensing device includes a torque sensor, a slip ring, a grating, and a cadence sensor. The driving module includes a motor, a reducer and the sensing device. The present disclosure combines the slip ring with the grating to integrate the cadence sensor and the torque sensor into one sensing device, such that the sizes of the sensing device and the driving module are reduced.

Abstract: An electronic device includes a housing and an electronic card connector. The housing includes a supporting wall and a number of peripheral sidewalls. The supporting wall and the number of peripheral sidewalls define an accommodating space. The peripheral sidewall defines a first through hole and a second through hole. The electronic card connector includes a tray being received in the accommodating space, a first geared rack being received in the second through hole, a cylinder gear being rotatably coupled to the supporting wall and meshed with the first geared rack, and a second geared rack being coupled to the supporting wall and meshed with the cylinder. The tray is supported by the second geared rack. The cylinder gear and the second geared rack can be both driven to move to eject the tray ejected from the accommodating space.

Abstract: An electronic card connector includes a tray, a press member and a fixing member. The tray defines a defined space for accommodating an electronic card and a notch. The press member is slidably attached to a supporting wall. The press member includes a press body and a geared rack fixed to the press body. The geared rack includes a number of first gears protruding therefrom. The fixing member is rotatably attached to the supporting wall. The fixing member includes a geared portion and a hook protruding from the geared portion. The geared portion includes a number of second gears meshing with the first gears. The hook is capable of being received in the notch to engage the tray with the housing. The fixing member is driven to rotate by the press member to move out from the notch to disengage the tray from the housing.

Abstract: An electronic card connector includes a tray, a press member and a fixing member. The tray defines a defined space for accommodating an electronic card and a notch. The press member is slidably attached to a supporting wall. The press member includes a press body and a geared rack fixed to the press body. The geared rack includes a number of first gears protruding therefrom. The fixing member is rotatably attached to the supporting wall. The fixing member includes a geared portion and a hook protruding from the geared portion. The geared portion includes a number of second gears meshing with the first gears. The hook is capable of being received in the notch to engage the tray with the housing. The fixing member is driven to rotate by the press member to move out from the notch to disengage the tray from the housing.

Abstract: An electronic device includes a housing and an electronic card connector. The housing includes a supporting wall and a number of peripheral sidewalls. The supporting wall and the number of peripheral sidewalls define an accommodating space. The peripheral sidewall defines a first through hole and a second through hole. The electronic card connector includes a tray being received in the accommodating space, a first geared rack being received in the second through hole, a cylinder gear being rotatably coupled to the supporting wall and meshed with the first geared rack, and a second geared rack being coupled to the supporting wall and meshed with the cylinder. The tray is supported by the second geared rack. The cylinder gear and the second geared rack can be both driven to move to eject the tray ejected from the accommodating space.