Patent Publication Number: US-2017352505-A1

Title: Switch of battery

Description:
FIELD OF THE INVENTION 
     The present invention relates to a switch, more particularly to the switch installed to a battery for controlling the power supply of the battery. 
     BACKGROUND OF THE INVENTION 
     Battery is an electric power source provided for starting, illuminating, and operating internal equipments of a transportation mean such as a boat, a motor vehicle, etc. In general, the battery is fixed by using a screw to clamp two elastic arms to connectors of the battery respectively and a nut to fix a terminal of an electric wire to the position of the screw, so that the current of the battery is passed through the battery, the clamp, and the screw and transmitted to the serial wiring terminals to generate kinetic force to start the transportation means. In recent years, technology and science advance, and equipments added to the transportation means causes unnecessary power loss of the battery. Therefore, many manufacturers add a switch to the battery to achieve the anti-leakage and anti-theft effects. 
     With reference to P.R.C. Publication No. 202977267 for an automobile battery switch, the automobile battery switch comprises a hollow cap, a handle, a shaft coupled to the handle, a lug disposed at an outer end of the shaft, a first through hole formed on the cap, a groove formed at the first through hole and configured to be corresponsive to the lug, a torque transmission member disposed on an outer side of the shaft for limiting the shaft along the circumferential direction, a bump formed on the outer peripheral surface of the torque transmission member, and a blocking member disposed on a side of the groove, wherein the distance between the groove and the blocking member is smaller than the width of the bump. Through the action of turning the handle, the shaft transmits the torque to the switch through the torque transmission member to control the ON or OFF of the circuit. Since the shaft drives the torque transmission member to move coaxially, the lug of the shaft cannot be aligned precisely with the groove or latched into the inner wall of the cap, so as to prevent the handle and the cap from separating from one another. 
     As disclosed in P.R.C. Patent Publication No. 204130411, a “Battery master switch” includes a casing, a terminal block, a knob, a shaft and wiring board assembly, wherein the terminal block is fixed to the bottom of the casing and has a square slot formed at an upper surface of the terminal block, and the wiring board assembly installed in the square slot, and a sidewall of the square slot limits the rotation of the wiring board assembly along the circumferential direction, and the shaft has a transverse pin and the pin has a roller installed at both ends of the pin separately, and the roller is aligned precisely with a curved surface of the cam at the top of the casing, and the shaft is passed out from the top of the casing in the axial direction and connected to the knob, and a restoring spring is installed to the bottom of the knob, so that the knob drives the shaft to rotate, and the shaft drives the roller to roll on the curve surface of the cam and move downwardly, so that the wiring board is in a close contact with a wiring bolt due to the compression of the spring, so as to improve the flexibility of turning the knob. 
     As disclosed in E.P.O. Pat. No. 2811500A1, a “Battery cutoff switch for vehicles comprises a casing, a retainer body, an elastic device, a handle and a cam, and the cam has first and second active surfaces, and the handle has a first control member and a second control member configured to be corresponsive to the first and second active surfaces respectively, such that when the handle is turned from an OFF position to an ON position, the second control member and the retainer body at the second active surface are moved from an off contact position to an on contact position, so that the safety function of the contact point of the second control member is assured even in an abnormal condition of turning on the battery. 
     In view of the aforementioned problems of the prior art, the discloser of this disclosure based on years of experience in the related industry to conduct extensive researches and experiments, and finally provided a feasible solution to overcome the problems of the prior art. 
     SUMMARY OF THE INVENTION 
     In view of the conventional battery having an issue of power loss due to the dark current of equipments of a transportation means, it is a primary objective of the present invention to provide a switch of a battery, wherein the knob is movably passed into the cap, and the knob is slid on the cam to control the ON or OFF of the battery and allow the knob to be removed during the OFF state, so as to achieve the anti-theft effect. 
     To achieve the aforementioned and other objectives, the present invention provides a switch of a battery, comprising: a knob, having a shaft formed therein, and a lug disposed on both sides of the shaft separately; a cap, having a containing space formed therein, and a slot formed at the exterior of the cap and being in a shape corresponsive to the shaft and the lug of the cap, for passing the knob into the slot; a cam, installed in the containing space of the cap, and having two first planes and two second planes disposed at corresponsive positions of the external periphery of the cam and two inclined planes coupled to the first plane and the second plane, and the plane and the inclined plane being provided for sliding the lug, and the cam having a metal plate installed at the bottom of the cam, and a first elastic member being disposed between the cam and the metal plate, and the metal plate having two first contact points formed thereon; and a base, for containing the cam, and having two second contact points formed at the interior of the base, and a second elastic member being disposed between the base and the cam, and two terminal columns being formed at the bottom of the base. 
     Wherein, the shaft of the knob may be movably passed into the slot of the cap and disposed on the first and second planes or the inclined plane of the cam, and the cam may be installed between the containing space of the cap and the base, so that when the knob is turned according to a user requirement, the lug of the shaft is slid and moved to the first plane, the inclined plane or the second plane to achieve the effects of connecting or disconnecting the battery and removing the knob, as well as achieving the anti-theft effect by removing the knob. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of the present invention; 
         FIG. 2  is an exploded view of the present invention; 
         FIG. 3  is an exploded view of the present invention viewing from another angle; 
         FIGS. 4 -A to  4 -B are schematic views of an OFF state of the present invention; 
         FIG. 5  is a cross-sectional view of an OFF state of the present invention; 
         FIGS. 6 -A to  6 -B are a schematic views of an ON state of the present invention; 
         FIG. 7  is a partial cross-sectional view of an ON state of the present invention; 
         FIGS. 8 -A to  8 B are schematic views of an anti-theft state of the present invention; 
         FIG. 9  is a partial cross-sectional view of an anti-theft state of the present invention; 
         FIG. 10  is a perspective view of another embodiment of the present invention; and 
         FIGS. 11 -A to  11 B are schematic views of another embodiment of the present invention. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The technical contents of this disclosure will become apparent with the detailed description of preferred embodiments accompanied with the illustration of related drawings as follows. It is intended that the embodiments and figures disclosed herein are to be considered illustrative rather than restrictive. 
     With reference to  FIGS. 1 to 3  for a switch of a battery, the switch  1  comprises a knob  2 , a cap  3 , a cam  4  and a base  5 , wherein the knob  2  has a shaft  21  formed therein and a lug  211  disposed on both sides of the shaft  21  separately; the cap  3  has a containing space  31  formed therein and a slot  32  formed on the exterior of the cap  3  and in a shape corresponsive to the shaft  21  and the lug  211  of the knob  2  and provided for passing the shaft  21  and the lug  211  of the knob  2  of the cap  3 ; the cam  4  is installed in the containing space  31  of the cap  3 , and the external periphery of the cam has two first planes  41 , two second planes  42  and two inclined planes  43  coupled to the first plane  41  and the second plane  42  and corresponsive to one another, and the first plane  41 , the second plane  42  and the inclined plane  43  are provided for sliding and moving the lug  211  of the knob  2 , and a metal plate  44  is installed at the bottom of the cam  4 , and a first elastic member  45  is installed between the cam  4  and the metal plate  44 , and the metal plate  44  has two first contact points  441  formed thereon, wherein the first elastic member  45  of an embodiment of the present invention is a spring; and the base  5  is for containing cam  4 , and the base  5  has two second contact points  51  formed therein, and a second elastic member  52  is installed between the base  5  and the cam  4 , and two terminal columns  53  are formed at the bottom of the base  5 , wherein the second elastic member  52  of an embodiment of the present invention is a spring. 
     In an embodiment of the present invention as shown in  FIGS. 2-3 , the cap  3  has two openings  33  formed on the outer side of the cap  3 , and at least one arc column  34  is formed in the containing space  31 , and the external periphery of the cam  4  has at least one arc groove  46  corresponsive to the arc column  34 , and the outer side of the base  5  has two bumps  54  corresponsive to the opening  33  of the cap  3 . In assembling, the shaft  21  and the lug  211  of the knob  2  are movably passed into the slot  32  of the cap  3 , and the arc groove  46  of the cam  4  and the arc column  34  of the cap  3  are embedded and engaged with each other, so that the cam  4  is disposed in the containing space  31  of the cap  3 , and the lug  211  of the knob  2  abuts the position of the first plane  41 , the second plane  42  or the inclined plane  43  of the cam  4 , and the base  5  is plugged into the containing space  31  of cap  3 , and the bump  54  of the base  5  is embedded and fixed into the opening  33  of the cap  3 . 
     With reference to  FIGS. 4 -A to  4 -B for setting the battery at an OFF state, the knob  2  of the switch  1  is turned to an “OFF” position of the cap  3  as shown in  FIG. 5 . Now, the shaft  21  and the lug  211  of the knob  2  are not configured to be corresponsive to the position of the slot  32  of the cap  3  and are disposed on the two inclined planes  43  of the cam  4 . Due to the elastic restoring force of the first elastic member  45  and the second elastic member  52 , a gap is formed between the first contact point  441  of the cam  4  and the second contact point  51  of the base  5  as shown in  FIG. 5 , so that the switch  1  is situated at an OFF state. 
     With reference to  FIGS. 6 -A and  6 -B for setting the battery to an ON state, the knob  2  of the switch  1  is turned to an ON position of the cap  3  as shown in  FIG. 7 . Now, the shaft  21  and the lug  211  of the knob  2  are not configured to be corresponsive to the position of the slot  32  of the cap  3  and are disposed on the two first planes  41  of the cam  4  (and at the highest point of the cam  4 ), so that the first elastic member  45  and the second elastic member  52  are compressed since the cam  4  is pressed down by the lug  211  of the knob  2 , and the first contact point  441  of the cam  4  and the second contact point  51  of the base  5  are contacted with each other (as shown in  FIG. 5 ), so that the switch  1  is situated at an ON state. 
     With reference to  FIGS. 8 -A,  8 -B and  9  for using the battery with an anti-theft function, the knob  2  of the switch  1  is turned to an OUT position of the cap  3 . Now, the shaft  21  and the lug  211  of the knob  2  are configured to be corresponsive to the position of the slot  32  of the cap  3  and disposed on the two second planes  42  of the cam  4 , so that the shaft  21  and the lug  211  of the knob  2  can be removed from the slot  32  of the cap  3 , and the switch  1  is lack of the knob  2  and cannot be operated. In addition, the switched  1  is switched to the OFF state. 
     With reference to  FIG. 10  for another embodiment of the present invention, when it is not necessary to use the switch  1  for the anti-theft purpose, then the cam  4  may have a cylinder  47  installed on one of the second planes  42 , such that after the knob  2  is installed to the cap  3  and when it is necessary to turn the knob  2  to move the two lugs  211  to the second plane  42  (as shown in  FIGS. 11 -A and  11 -B), the lug  211  is blocked by the cylinder  47  and cannot be moved, so that the knob  2  cannot be removed from the cap  3  in order to prevent the knob  2  from missing or lost. 
     By movably passing the shaft  21  of the knob  2  into the slot  32  of the cap  3  and placing the shaft  21  onto the first plane  41 , the second plane  42 , or the inclined plane  43  of the cam  4 , the knob  2  may be turned according to a user requirement, so that the lug  211  of the knob  2  may be slid and moved to the first plane  41 , the inclined plane  43 , or the second plane  42  to achieve the effects of connecting or disconnecting the battery or preventing any unauthorized removal of the knob  2 . When the anti-theft function is not needed, the second plane  42  of the cam  4  may have a cylinder  47  installed thereon, so that the lug  211  of the knob  2  is blocked by the cylinder  47  and cannot be configured to be corresponsive to the slot  32  of the cap  3  to achieve the effect of preventing the knob  2  from missing or being lost. 
     While this disclosure has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of this disclosure set forth in the claims.