Abstract: A backup battery charger charges a backup battery of a handheld electronic device. The handheld electronic device comprises a power supply unit and an electronic component. The power supply unit supplies a power to the electronic component. The backup battery charger is connected to the electronic component, such that the backup battery charger shares with the electronic component the power, uses the power as a charging power, and controllably determines via a control module whether to supply the charging power to the backup battery.

Abstract: A charging method and a charging system are introduced for controlling a charging current by a PWM method. A charging IC is controlled to supply the charging current to a battery, and a control unit is used to generate a PWM signal with a duty cycle, and a filter unit is used to convert the PWM signal into a voltage signal to be supplied to the charging IC, and the control unit determines whether a current of a battery detected by the battery status detection unit reaches a regular current, so that a PWM signal with a duty cycle greater than the previous duty cycle by a default increased cycle is provided if the detected current has not reached the regular current. Thus, the feature of the PWM signal is used to set the charging current according to the capacity of the battery automatically.

Abstract: It is a snap-engagement structure whereby a mother body and a daughter body of a portable electronic device are snap-engaged with each other and thereby fixed to each other. The mother body includes two installation units. The snap-engagement structure includes a key unit, fastening units, and a first restoring unit. The key unit and the fastening units move relative to each other in different directions to effectuate enhanced snap-engagement, watertightness, and miniaturization.

Abstract: A system and a method for controlling access at a user end are disclosed. The correlation between a tag signal of a femtocell access point and a tag signal of a fixed internet device is established, such that when the femtocell access point would access internet via the fixed internet device, a tag signal of the femtocell access point and a tag signal of the fixed internet device are acquired, so as to determine whether the tag signal of the femtocell access point and the tag signal of the fixed internet device match the correlation in the data bank. When the tag signal of the femtocell access point and the tag signal of the fixed internet device match the correlation, the femtocell access point is allowed to provide access services. The present invention provides an effective mechanism for controlling access at a user end.

Abstract: An overvoltage protection circuit and a portable electronic device having the same are introduced. The overvoltage protection circuit provides overvoltage protection when an input voltage exceeds a rated voltage tolerable by an internal circuit unit in the portable electronic device. A reference voltage and a partial voltage are generated from the input voltage through a voltage limiting unit and voltage dividing module, respectively, and conveyed to a comparing module for comparison. Comparison of the reference voltage and the partial voltage is followed by generation of a switch signal whereby a switch unit determines whether to apply the input voltage to the internal circuit unit. The voltage dividing module sets the maximum rated voltage tolerable by the internal circuit unit and enables the overvoltage protection circuit to give overvoltage protection to the portable electronic device regardless of temperature.

Abstract: A film pasting device for pasting a protection film on a display screen is provided, which includes: a main body having a receiving slot for receiving the protection film so as for the display screen to be disposed on the protection film; a base disposed in the receiving slot for carrying the protection film and the display screen; a positioning member disposed on the main body for positioning the display screen on the base; and a vertical movement member disposed over the main body and movable towards the base so as to provide a vertical force for pressing the display screen down, thereby pasting the protection film on top and side surfaces of the display screen through the vertical force provided by the vertical movement member and a horizontal force provided by the main body, respectively. Therefore, the present invention improves the film pasting quality and saves operation time.

Abstract: A system and a method for managing solder paste are disclosed. The storage information of solder paste cans stored in a storage room is established, production information is accessed from a production managing system for analyzing an amount of solder paste cans in need, the solder paste cans to be used are inquired and obtained from the storage room, and the solder paste cans are delivered to the warm up room for warm up treatment. The solder paste is thus systematically managed, such that the efficacy of management is improved and labor cost is reduced.

Abstract: A device for managing solder paste includes a storage room, a warm up room, a preparing room and a central control device, wherein the storage room, the warm up room and the preparing room respectively have a transportation unit for delivering a solder paste can. There are reading devices disposed respectively at an inlet/outlet of the above rooms for reading information of the solder paste can when the solder paste can passes thereby, and the central control device updates storage information for the solder paste cans. The central control device may access production information of a production line from a production managing system, and thus analyze the mold number and amount of solder paste cans, receive the solder paste cans based on a first-in, first-out manner, and deliver the solder paste cans to the warm up room for the warm up treatment.

Abstract: A fixing frame and an assembled fixing device printing solder paste on a printed circuit board improve an assembly process, cut production costs, and save storage space. The fixing frame has a plurality of fixing portions and a motor unit. The fixing portions are connected to each other to define a hollowed-out planar region. The motor unit generates a plurality of pulling forces by means of mechanical transmission. The assembled fixing device includes a fixing frame and a stencil. The stencil has a solder paste printing region and a plurality of fixing regions. The edge of the solder paste printing region extends outward to define the fixing regions. The fixing regions are movably fixed to the fixing portions and bear the pulling forces. The solder paste printing region lies within the hollowed-out planar region. The directions of the pulling forces are coplanar with the solder paste printing region.