Abstract: A finger clamping device and an oximeter using the finger clamping device are provided. The finger clamping device includes a shell, an upper clamping member, and a lower clamping member. The shell includes two oppositely facing sidewalls. Each sidewall defines at least one sliding rail. The upper clamping member is arranged in the shell and defines two guiding rods. The two guiding rods are received in and slide along the sliding rail. At least one elastic member joins the lower clamping member and the upper clamping member and is tensioned when a finger is inserted between the upper clamping member and the lower clamping member.

Abstract: An automatic ejection mechanism of a connecting device includes an outer shell defining an accommodating space and including a rear cover covering a rear end of the accommodating space, a connector slidably received within the accommodating space, a fastening assembly located between the connector and the rear cover, and a resilient member located between the connector and the rear cover. The resilient member drives the connector to slide toward an opening of a front end of the accommodating space. The connector is received within the accommodating space by being fastened to the connector. The connector is ejected out of the opening of the front end by releasing the fastener from the connector.

Abstract: An oximeter includes a main body defining an opening and a finger clamping device arranged in the opening. The finger clamping device includes a shell, an upper clamping member, and a lower clamping member. The shell includes an inner wall carrying a sliding rail. The upper clamping member is arranged in the shell and defines a spindle. A portion of the spindle is received in the sliding rail and can slide along the sliding rail. The lower clamping member faces the upper clamping member and is coupled to the upper clamping member by a torsion spring. A finger being inserted between the upper clamping member and the lower clamping member causes the torsion spring to stretch, the finger is thus clamped by the upper clamping member and the lower clamping member with an elastic restoring force.

Abstract: An automatic ejection mechanism of a connecting device includes an outer shell defining an accommodating space and including a rear cover covering a rear end of the accommodating space, a connector slidably received within the accommodating space, a fastening assembly located between the connector and the rear cover, and a resilient member located between the connector and the rear cover. The resilient member drives the connector to slide toward an opening of a front end of the accommodating space. The connector is received within the accommodating space by being fastened to the connector. The connector is ejected out of the opening of the front end by releasing the fastener from the connector.

Abstract: An air conditioner front panel with two-layer structure for increased structural strength and cosmetic durability includes a support frame and a protective cover. The support frame has a mounting bracket. The mounting bracket has a front surface and a rear surface. The protective cover is made of a transparent material. The protective cover has a front surface and a rear surface. The rear surface of the protective cover is painted. The protective cover covers the front surface of the mounting bracket, and the rear surface of the protective cover faces the front surface of the mounting bracket. The color on the rear surface of the protective cover does not fade and is protected against scratches and abrasions.

Abstract: A spring-loaded rounded latching structure includes a main body and a back cover. The main body defines a groove bound by a bottom wall and a sidewall. The bottom wall defines a slot and includes a resisting portion. The side wall includes a first snap. The main body includes a button. The button includes a pushing member. The back cover defines a second slot and includes a second snap and a stopping block. The back cover is slidable relative to the main body along the groove defined in the main body. The first snap is snapped in the second slot. The second snap is snapped in the first slot. The resisting portion resists the stopping portion to limit a sliding movement of the back cover. The resisting portion is released from the stopping portion within the groove by the pushing member.

Abstract: An opening and closing structure arranged on a casing of an electronic device includes a cover plate and at least one connecting assembly. The cover plate is arranged inside a groove defined in an outer surface of the casing. The connecting assembly includes a connecting rod. A first end of the connecting rod is coupled to the cover plate. A second end of the connecting rod passes through the groove. The connecting rod is slidable within the casing to allow the cover plate to open and close relative to the casing.

Abstract: A wheel fastening system for a wheeled mobile robot includes a chassis, a motor, a wheel, a thrust bearing, a stud, and a screw. The chassis has a base and a cover. The cover covers the base. The motor is disposed in the chassis. The motor has a shaft. The wheel has a hub by which the wheel is centered on the shaft of the motor. The thrust bearing is an interference fit between the wheel and the chassis and provides axial support for the wheel. The stud passes through the hub of the wheel to couple to the shaft of the motor. The screw is coupled to the stud, and is clamped between the base and the cover of the chassis. The stud and the screw prevent the wheel from radially shifting relative to the shaft of the motor.

Abstract: A wheel fastening system for a wheeled mobile robot includes a chassis, a motor, a wheel, a thrust bearing, a stud, and a screw. The chassis has a base and a cover. The cover covers the base. The motor is disposed in the chassis. The motor has a shaft. The wheel has a hub by which the wheel is centered on the shaft of the motor. The thrust bearing is an interference fit between the wheel and the chassis and provides axial support for the wheel. The stud passes through the hub of the wheel to couple to the shaft of the motor. The screw is coupled to the stud, and is clamped between the base and the cover of the chassis. The stud and the screw prevent the wheel from radially shifting relative to the shaft of the motor.

Abstract: An infrared sensor includes a housing, a circuit board, an infrared emitting device, and an infrared receiving device. The circuit board receives in the housing and includes an upper surface and a lower surface. The upper surface and the lower surface are opposite sides of the circuit board. The infrared emitting device is arranged on the upper surface of the circuit board and includes an emitter which is configured to emit infrared signals. The infrared receiving device is arranged on the lower surface of the circuit board and includes a receiver which configured to receive reflected infrared signals reflected by an object. The receiver is offset relative to the emitter, and the circuit board converts an infrared voltage value of the reflected infrared signals to determine a distance of the object.

Abstract: A distance sensor includes an IR emitter, an IR receiver, and an annular support. The IR emitter includes a transmitter. The IR receiver includes a number of transceivers. The annular support includes a transmitter support and a transceiver support. The transmitter support is located centrally within the transceiver support. The transmitter is arranged on the transmitter support. The transmitter emits infrared signals through a top of the annular support to a transmission lens, and the transmission lens scatters the infrared light. The transceivers are arranged on the transceiver support and positioned around a periphery of the annular support to receive reflected infrared signals.

Abstract: A system whereby a mobile robot can detect a floor-drop includes a chassis and at least one infrared (IR) sensor. The chassis includes a mounting portion and a translucent lens mounted on the mounting portion. The mounting portion and the translucent lens are inclined downwards, at an angle to a horizontal plane. The IR sensor is mounted in the chassis adjacent to the translucent lens. The IR sensor transmits a signal to a lower surface in front of the chassis through the transparent lens. The IR sensor can detect a distant floor-drop such that the mobile robot can have enough time to stop a front wheel going over the floor-drop.

Abstract: An opening and closing structure arranged on a casing of an electronic device includes a cover plate and at least one connecting assembly. The cover plate is arranged inside a groove defined in an outer surface of the casing. The connecting assembly includes a connecting rod. A first end of the connecting rod is coupled to the cover plate. A second end of the connecting rod passes through the groove. The connecting rod is slidable within the casing to allow the cover plate to open and close relative to the casing.

Abstract: A rounded latching structure includes a main body, a back cover, and a lock. The main body defines a groove bound by a bottom wall and a sidewall. The bottom wall defines a slot. The side wall includes a first snap. The back cover defines a second slot and includes a second snap. The back cover is slidable relative to the main body along the groove defined in the main body. The first snap is snapped in the second slot. The second snap is snapped in the first slot. The lock includes a resisting portion for fixing the back cover to the main body when the back cover is snapped to the main body.

Abstract: A wheel fastening system for a wheeled mobile robot includes a chassis, a motor, a wheel, and a thrust bearing. The motor is disposed in the chassis, and the motor turns a shaft connected to the wheel. The thrust bearing is an interference fit between the wheel and the chassis and provides axial support for the wheel to hold the position of the wheel. The wheeled mobile robot does not deviate from a chosen path during movement.

Abstract: An electronic device which can physically move according to vocal instructions includes a control device, a voice device, and a driving device. The control device responds to user instructions. The voice device is used for performing voice interaction between the electronic device and a user. The driving device drives the electronic device to move. When the voice device receives a voice instruction from the user, the control device recognizes the voice instruction. If a voice instruction includes a destination position, the control device recognizes same and transmits a moving control instruction to the driving device, the driving device drives the electronic device to move to that destination position.

Abstract: An electronic device includes a rotary structure and a display screen. The rotary structure includes a first shell and two second shells. The first shell has a buckle member. Each second shell includes an annular track. The display screen is arranged on the first shell. A number of holding grooves is defined in the annular track. The buckle member is rotationally coupled to the annular track by being latched in the holding grooves to rotationally couple the second shell to the first shell. The first shell and second shell are rotatable relative to each other along the holding grooves of the annular track. An angle of view of the display screen is adjusted by rotating the first shell relative to the second shell.

Abstract: A sound output device which can be fitted flush to match shape and contour of a desired housing device includes an arc-shaped shell as the housing, a mainboard, at least one first sound output unit, at least one second output unit, and at least one conductive distance piece. The arc-shaped shell defines sound output holes. The first sound output unit is located on one side of the mainboard close to the at least two sound output holes. The at least one second output unit is located above the conductive distance piece on the side of the mainboard close to the sound output holes. The conductive distance piece elevates the at least one second sound output unit to the same level as that of the first sound output unit, or to some other level required for the particular shape of the arc-shaped shell.

Abstract: An electronic device includes a medical testing unit. The medical testing unit includes a medical processor, a number of medical testing modules, and a number of testing subunits. Each testing subunit is electrically coupled to a corresponding medical testing module, the medical processor is electrically coupled to the medical testing modules. The medical processor is used for controlling the testing subunits and the medical testing modules to test physiological parameters of users, and acquire, process, and analyze the physiological parameters to generate health data.