Abstract:
A lighting battery relates to a cylindrical rechargeable battery. The lighting battery comprises a battery body, a driving circuit, a switch and light-emitting diodes, wherein the switch is an inching switch, and the driving circuit has a trigger pin which is connected to the switch whereby a trigger signal is acquired to control the driving circuit operate or stop. The power pin and grounding pin of the driving circuit is respectively connected to the positive pole and the negative pole of the battery body, as well as the output pin of the driving circuit is connected to the light-emitting diodes.

Description:
FIELD OF THE INVENTION 
     The present invention relates to a cylindrical rechargeable battery. 
     BACKGROUND OF THE INVENTION 
     In Chinese patent named “LIGHTING BATTERY” (Chinese Patent Application Number: 200910059222, Publication Date: Sep. 30, 2009), a dry battery with a light-emitting device is disclosed, in the dry battery “the film light-emitting diodes which are connected to the positive and negative poles of the battery through the conductor are set up on the outer surface of the battery; or the miniature light-emitting diodes could be mounted in the end of the battery, which are connected to the positive and negative poles of the battery through the conductor . . . a driving circuit connected to the light-emitting diodes is set on the outer surface of the battery”. The invention mentioned above makes the dry battery could be used as a simple illumination device through self-radiation, as well as display its residual capacity. However, as the switch of this battery is an elastic contact switch, the normal status of the switch is open circuit, and the switch position of the battery has to be pressed constantly during illumination period, which causes inconvenience in use. On the other hand, configuration of a self-locking switch or a toggle switch to an AA or AAA battery with small size in order to meet the requirement of long time illumination is impossible. 
     SUMMARY OF THE INVENTION 
     The present invention provides a lighting battery which is of standard size and could be operated simply. The lighting battery could emit light after a switch is pressed, and stop emitting light after the switch is pressed once more. 
     The lighting battery of the present invention comprises a battery body, a driving circuit, a switch and light-emitting diodes, wherein the switch is an inching switch, and the driving circuit has a trigger pin which is connected to the switch whereby a trigger signal is acquired to control the driving circuit operate or stop. The power pin and grounding pin of the driving circuit is respectively connected to the positive pole and the negative pole of the battery body, as well as the output pin of the driving circuit is connected to the light-emitting diodes. 
     One advantage of the present invention is that the status of emitting light or not of the light-emitting diodes is toggled alternately according to the trigger of the switch, therefore the switch position of the lighting battery need not be pressed constantly by users, which makes the usage more convenient. Another advantage of the present invention is that the operation current of the light-emitting diodes is sustained by the trigger circuit without flowing across the switch, therefore the switch could be made lighter and thinner, as well as more reliable and durable. Also, the present invention is easier to implement in a small size battery, without shape and size alteration of the previous battery. 
     The present invention is suitable for the lighting battery which is compatible with a cylindrical rechargeable battery on the aspects of shape, size and electrical properties. The lighting battery according to the present invention could be settled in the battery house of an electrical device the same as a traditional product. Also it could be independently used as a portable light source device in outdoor activities, rescue, entertainment and other occasions. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is one of the exploded parts graphs of the first embodiment of the present invention; 
         FIG. 2  is one of the structure graphs of the first embodiment of the present invention; 
         FIG. 3  is an appearance graph of the flexible printed circuit board of the first embodiment of the present invention; 
         FIG. 4  is a plan graph of the flexible printed circuit board of the first embodiment of the present invention; 
         FIG. 5  is a left view graph of the flexible printed circuit board of the first embodiment of the present invention; 
         FIG. 6  is another exploded parts graph of the first embodiment of the present invention; 
         FIG. 7  is another structure graph of the first embodiment of the present invention; 
         FIG. 8  is an enlarged graph of the area A in  FIG. 7 ; 
         FIG. 9  is the switch structure graph of  FIG. 8  during the self-adhesive battery trademark film being pressed; 
         FIG. 10  is a appearance graph of the lighting battery being assembled; 
         FIG. 11  is an appearance graph of the flexible printed circuit board of the second embodiment of the present invention; 
         FIG. 12  is a plan graph of the flexible printed circuit board of the second embodiment of the present invention; 
         FIG. 13  is a left view graph of the flexible printed circuit board of the second embodiment of the present invention; 
         FIG. 14  is an exploded parts graph of the second embodiment of the present invention; 
         FIG. 15  is a structure graph of the second embodiment of the present invention; 
         FIG. 16  is an enlarged graph of the area B in  FIG. 15 ; 
         FIG. 17  is the switch structure graph of  FIG. 16  during the self-adhesive battery trademark film being pressed; 
         FIG. 18  is one of the electrical diagrams of the embodiments of the present invention; 
         FIG. 19  is another electrical diagram of the embodiments of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Now, embodiments of the present invention will be described in detail by reference to the accompanying drawings. 
     Referring to  FIGS. 1-7  and  FIG. 10 , the first embodiment of the present invention comprises a battery body, a driving circuit, a switch and two light-emitting diodes. The positive pole of the battery body is a metal cap  4  with a cap brim  3 , and the negative pole is a metal cylinder  5  the bottom of which is closed. A self-adhesive battery trademark film  6  adheres closely to the outer surface of the metal cylinder  5 . A first conductive region  7  of round shape is printed on the inner side of the self-adhesive battery trademark film  6  using conductive copper pulp, and a trademark Logo is printed on the outer surface of the self-adhesive battery trademark film  6 . A contact indication icon  24  is set on the location of the outer surface corresponding to the first conductive region  7 . 
     The driving circuit comprises an integrated circuit  8  with a trigger pin, an inductor  9  and a capacitor  19 ; the integrated circuit  8 , the inductor  9 , the capacitor  19  and two light-emitting diodes  2  are all welded to the top copper foil layer circuit of the flexible printed circuit board  10  which has double-layer copper foil layers. 
     The flexible printed circuit board  10  comprises a ring body  11  and a elongate tongue  12  which extends outward substantially along the radial direction from the boundary of the ring body  11 . The ring body  11  of the flexible printed circuit board  10  surrounds the metal cap  4  and is settled on the cap brim  3 , and the elongate tongue  12  is folded downward along the ektexine of the metal cylinder  5  from the opening of the metal cylinder  5 . The elongate tongue  12  is wrapped by the self-adhesive battery trademark film  6  and close to the metal cylinder  5 . The elongate tongue  12  has a ring shaped end, and the ring at the end of the elongate tongue  12  overlaps with the first conductive region  7  of round shape on the self-adhesive battery trademark film  6 . The outside diameter of the ring at the end of the elongate tongue  12  is similar with the diameter of the first conductive region  7 . 
     A second conductive region  13  connected to the power pin of the integrated circuit  8  is arranged on the bottom copper foil layer of the ring body  11  on the flexible printed circuit board  10 , and the second conductive region  13  contacts with the cap brim  3  in order that the power pin of the integrated circuit  8  is connected to the positive pole. To ensure good conductivity, there is a conductive double-sided adhesive  17  between the cap brim  3  and the second conductive region  13 . A third conductive region  14  connected to the grounding pin of the integrated circuit  8  is arranged on the bottom copper foil layer of the elongate tongue  12  on the flexible printed circuit board  10 , the third conductive region  14  contacts with the metal cylinder  5  in order that the grounding pin of the integrated circuit  8  is connected to the negative pole. A fourth conductive region  15  of ring shape is arranged on the top copper foil layer of the ring at the end of the elongate tongue  12 . The fourth conductive region  15  is connected to the trigger pin of the integrated circuit  8  and its outside diameter is slightly larger than the outside diameter of the first conductive region  7 . 
     Referring to  FIGS. 8-9 , the fourth conductive region  15 , the metal cylinder  5  and the first conductive region  7  on the self-adhesive battery trademark film  6  compose a switch together, and part of the first conductive region  7  contacts with the fourth conductive region  15 . When the location of the switch indication icon on the outer surface of the self-adhesive battery trademark film  6  is contacted and pressed by a finger, the rest part of the first conductive region  7  without contact with the fourth conductive region  15  is pushed towards the metal cylinder  5  through a ring hole  21 , thus the trigger pin of the integrated circuit  8  is connected to the negative pole and therefore acquires a trigger signal, and then the integrated circuit  8  controls the driving circuit to operate or not. 
     Referring to  FIG. 10 , there is a protection cover  18  above the driving circuit at the top of the lighting battery which is made of transparent materials. Therefore, the lighting battery has identical configuration as a traditional battery, and is able to make light from the light-emitting diodes pass. 
     Once more referring to  FIG. 4 , in a traditional rechargeable battery, the metal cap of the rechargeable battery has an exhaust hole for accident prevention during overcharge. In the present embodiment, two through holes  20  are arranged in the flexible printed circuit board  10 , the position of which are corresponding to the position of the two exhaust holes in the battery body in order to avoid the flexible printed circuit board  10  blocking the exhaust holes. 
     Referring to  FIGS. 11-15 , the differences between the second embodiment of the present invention and the first embodiment are as follows: 1. the structure of the flexible printed circuit board in the second embodiment is different from the first embodiment; 2. the self-adhesive battery trademark film in the second embodiment isn&#39;t provided with the first conductive region of the first embodiment; 3. an insulated paper gasket  16  with a hole is arranged at the position of the metal cylinder covered by the end of the elongate tongue  12 ; and the end of the elongate tongue  12  is wrapped by the self-adhesive battery trademark film  6  and closely contacts to the insulated paper gasket  16  and passes through the hole  25  in the insulated paper gasket  16 . 
     A second conductive region  13  connected to the power pin of the integrated circuit  8  is arranged on the bottom copper foil layer of the ring body  11  on the flexible printed circuit board  10 , and the second conductive region  13  contacts with the cap brim  3  in order that the power pin of the integrated circuit  8  is connected to the positive pole. The elongate tongue  12  of the flexible printed circuit board is in long strip shape, and a third conductive region  14  connected to the grounding pin of the integrated circuit  8  and a fourth conductive region  15  connected to the trigger pin of the integrated circuit  8  are arranged on the bottom copper foil layer of the elongate tongue  12 , wherein the third conductive region  14  is located at the front end of the elongate tongue, and the fourth conductive region  15  is located at the back end of the elongate tongue  12 . The third conductive region  14  contacts with the metal cylinder  5  in order to connect the grounding pin of the integrated circuit  8  with the negative pole. 
     Referring to  FIGS. 16-17 , the fourth conductive region  15  on the elongate tongue  12 , the insulated paper gasket  16  and the metal cylinder  5  compose a switch together. When the self-adhesive battery trademark film  6  on the back side of the fourth conductive region  15  which is located at the position of the hole  25  in the insulated paper gasket  16  is pressed by a finger, part of the fourth conductive region  15  protrudes into the hole  25  and contacts with the metal cylinder  5 , thus the trigger pin of the integrated circuit  8  is connected to the negative pole and therefore acquires a trigger signal, and then the integrated circuit  8  controls the driving circuit to operate or not. 
     Referring to  FIG. 18 , the driving circuit comprises an integrated circuit  8 , an inductor  9 , two light-emitting diodes  2  and a capacitor  19 . The integrated circuit  8 , the inductor  9 , the light-emitting diodes  2  and the capacitor  19  are all surface mount devices. The driving circuit  8  is a step-up LED driving circuit with a trigger pin, which serves to work together with the energy storage inductor to raise the 1.2V voltage of the battery body C to a operation voltage suitable for the LED. The power pin VDD of the integrated circuit  8  is connected to the positive pole of the battery body C, and the grounding pin GND of the integrated battery  8  is connected to the negative pole of the battery body C in order to provide operation voltage to the integrated circuit  8 . The trigger pin TRG of the integrated circuit  8  is connected to the switch  1 , and the other side of the switch  1  is connected to the negative pole of the battery body C. The enabling pin SD of the integrated circuit  8  is connected to the negative pole of the battery body C in order to make the integrated circuit  8  operate in a bistability state. One side of the inductor  9  is connected to the positive pole of the battery body C, and the other side is connected to the output pin LX of the integrated circuit  8 , both of the light-emitting diodes  2  are connected in parallel between the output pin LX and the grounding pin GND of the integrated circuit  8 . The capacitor  19  is connected in parallel between the trigger pin TRG and the grounding pin GND of the integrated circuit  8  to eliminate the interference. 
     Other circuit structures could be used as the driving circuit of the present invention. Referring to  FIG. 19 , the difference between the  FIG. 19  and the  FIG. 18  is that two integrated circuits are utilized, i.e. the first integrated circuit  22  and the second integrated circuit  23 . The second integrated circuit  23  is a triple terminal device, and it is also a step-up LED driving circuit which generates an output when power-on. The first integrated circuit  22  is a bistability trigger, the output pin of which is connected to the grounding pin of the second integrated circuit  23 . When a low level is output from the output pin of the first integrated circuit  22 , the second integrated circuit  23  is power-on and the LEDs emit light; and when a high level is output from the output pin of the first integrated circuit  22 , the second integrated circuit  23  is power-off and the LEDs is lighting-off.