Method and device for triggering power supply switch of a cordless electric-apparatus

#The invention generally relates to a method and device for triggering power supply module switch of a cordless electric-apparatus and more particularly to a method and device for triggering the power supply module switch of the cordless hand-held apparatus through inducting electrostatic charge from user body.

#Generally, while user does not use the cordless hand-held apparatus, the cordless electric-apparatus still consumes power as normal, such consumption is unnecessary. It shortens battery working time, and the user must replace battery frequently.

#Thereafter, typical examples for minimizing the power consumption are disclosed. A cordless electric-apparatus utilizes a device having a timer to decrease power consumption. When user stop working, the timer starts timing till a predetermine time expired, the device will change cordless hand-held apparatus working state to a sleep mode in order to decrease power consumption. When the device detects actions that the apparatus was used again like apparatus moved or keys pressed, the device will transmit signal to wake up the apparatus for working as normal. Such device can decrease the power consumption, however, the cordless hand-held apparatus will consume electrical power until the apparatus switching to power saving state or sleep mode.

#The present invention will be apparent to those skilled in the art by reading the following description of preferred embodiments thereof, with reference to the attached drawings, in which:

#FIG. 1 is a first embodiment of the present invention showing the working principle of the method and device for triggering power supply module switch of a cordless electric-apparatus;

#FIG. 2 is a second embodiment of the present invention showing the working principle of the method and device for triggering power supply module switch of a cordless electric-apparatus;

#Please refer to FIG. 1. FIG. 1 is a first embodiment showing the working principle of the present invention. A method and device for triggering power supply module switch of a cordless electric-apparatus of the present invention utilizes electrostatic induction to trigger power switch applied in the cordless hand-held apparatus. The present invention provides an electrostatic inductive element 4 connected to a power supply module 6. Both of the inductive element 4 and the power supply module 6 are connected to a grounding 10. The electrostatic inductive element 4 may comprises a metal inductive area (which will be further detailed described in FIGS. 3˜10) and inductive electrodes (not shown). While a user body 2 approaches or touches the inductive electrodes of the electrostatic inductive element 4, or the user body 2 approaches or touch the metal inductive area that conducts with the inductive electrodes, electrostatic inductive element 4 will induct electrostatic charge from the user body 2. At the same time, the inductive element 4, the user body 2 and the grounding 10 will buildup a loop, thus, an inductive switch (not shown) within the electrostatic inductive element 4 will be turned on so as to control the power supply module 6 and the cordless electric-apparatus to form a loop. Therefore, the cordless electric-apparatus forms a performance mode for working. On the contrary, the user body 2 leaves away from the inductive electrodes or the metal inductive area of the electrostatic inductive element 4, the loop formed by the electrostatic inductive element 4, the body 2 and the grounding 10 will be cut off. The inductive switch within electrostatic inductive element 4 will also be turned off, and the circuit between the power supply module 6 and the cordless electric-apparatus will be opened, then, the cordless electric-apparatus will stop working right away to be a sleep mode.

#FIG. 2 is a second embodiment showing the working principle of the present invention. The second embodiment comprises an electrostatic inductive element 4, a CPU (Central Process Unit) 8 connected to the electrostatic inductive element 4 and a power supply module 6 connected to the CPU 8. Both of the inductive element 4 and the power supply module 6 are connected to a grounding 10. The CPU 8 controls the power supply module 6 to provide the cordless electric-apparatus with two working mode, that is, performance mode and sleep mode. Under performance mode, the power supply module 6 supplies power for the cordless electric-apparatus. Under sleep mode, the power supply module 6 supplies a part of power for the cordless electric-apparatus. While the user body 2 approaches or touches inductive electrodes of the electrostatic inductive element 4 or the user body 2 approaches or touches a metal inductive area that conducts with the inductive electrodes, the electrostatic inductive element 4 will induct electrostatic charge from the user body 2. The electrostatic inductive element 4, the user body 2 and the grounding 10 will buildup a loop, a inductive switch within the electrostatic inductive element will be turned on, the CPU 8 within cordless apparatus will detect the state that the inductive switch was turned on so as to transmit a command to the power supply module 6 to supply power to the cordless apparatus and will switch to wake up mode. While the user body 2 leaves away from the inductive electrodes or the metal inductive area of the electrostatic inductive element 4, the loop formed by the electrostatic inductive element 4, the user body 2 and the grounding 10 will be cut off. The inductive switch within electrostatic inductive element 4 will also be turned off, the CPU 8 within cordless apparatus will detect the state that the inductive switch was turned off so as to send a command to make the power supply module stopping normal power supply, and the CPU 8 can also send a sleeping command to make the cordless apparatus switch to sleeping mode. Generally, the state of the power supply module 6 is set the same as the state of the electrostatic inductive element 4. Further, the state of the power supply module 6 can be set as reverse to the state of the electrostatic inductive element 4.

#Referring to FIG. 3, a cordless mouse 20 utilizes the device of the present invention for triggering power supply module switch. The cordless mouse 20 comprises a left key 21, a right key 23 and a wheel 22 placed on the top of the cordless mouse 20, these components are similar to conventional mouse. The cordless mouse 20 further comprises a first metal inductive area 25 that will induct electrostatic charge from a user palm of the user body 2 located in the rear of the cordless mouse 20; a second metal inductive area 26 that will induct electrostatic charge from user fingers of the user body 2 located in the lateral of the cordless mouse 20. The first metal inductive area 25 and the second metal inductive area 26 directly connect to inductive electrode of the electrostatic inductive element 4 (as illustrated in FIG. 1) within the cordless mouse 20. Therefore, the first and second metal inductive area 25 and 26 will induct electrostatic charge from user body 2 when user body 2 approaches or touches the metal inductive area 25 or 26, the induction produced by the metal inductive area 25 or 26 will be transmitted to the electrostatic inductive element 4, a inductive switch (not shown) within the electrostatic inductive element 4 will be turned on so as to make the power supply module 6 to supply power to the cordless mouse 20. On the contrary, while user body 2 leaves away from the metal inductive area 25, 26, the electrostatic inductive element 4 will detect the change of the electrostatic charge, and the inductive switch within the electrostatic inductive element 4 will be turned off so as to make the power supply module 6 stop supplying power to the cordless mouse 20. Same as described above, while the cordless mouse 20 equipped with the CPU 8, the inductive switch within the electrostatic inductive element 4 will produce a signal, the CPU 8 will detect the signal and will transmit “turn on” or “turn off” command to the power supply module 6 to supply power to the cordless mouse 20 or not. Such arrangement achieves the general expectation of minimizing the power consumption of the cordless mouse 20.