Patent Publication Number: US-11022288-B2

Title: LED light apparatus

Description:
FIELD OF INVENTION 
     The present invention is related to a LED light apparatus and more particularly related to a LED light apparatus for being conveniently installed. 
     BACKGROUND 
     There are various lighting apparatuses in the world. Different light apparatuses are designed for satisfying different needs. Among the lighting apparatuses, downlight apparatuses are important and widely seen in offices, houses, and various buildings. 
     When LED technologies are developing, more and more downlight apparatuses also start migrating into the LED field. For LED devices, they are usually more energy efficient and with larger luminance efficacy. Even LED devices have many advantages over traditional light source elements, LED devices also have some technical problems to be solved. For example, heat dissipation is always a key issue when designing LED lighting apparatuses. In addition, when lighting apparatuses use LED devices, they have smaller size than traditional lighting apparatuses. To better utilize such advantages, new designs may be introduced to provide more convenience, e.g. on installation. 
     Because downlight apparatuses are so important in human life, any advancement in such crowded field may bring huge advancement on human life and industrial field. 
     SUMMARY OF INVENTION 
     According to an embodiment of the present invention, a LED light apparatus is designed for being connected to an external power source via a host connector. 
     The LED light apparatus includes a LED light source and a light housing. The LED light source is disposed in the light housing and the light housing has an opening for light of the LED light source to emit outside the LED light apparatus. 
     The light housing may be designed as a downlight, a spot light, a panel light or other types of light devices. There may be other components like reflectors, diffusion plates, lens, heat sinks, light guide plates disposed in the light housing depending on different design requirements. The LED light source may be disposed on a light source plate or divided into multiple parts disposed on desired positions of the light housing for emitting light to desired angles. 
     The LED light apparatus also has a driver circuit coupled to the light housing for converting the external power source to a driving current supplying to the LED light source. 
     In some embodiments, the driver circuit may be placed in a driver box disposed in the light housing. In some other embodiments, the driver circuit may be disposed directly in the light housing without being placed in a separate container. In some other embodiments, the driver circuit may be disposed in an external box that is connected to the light housing. For example, the external box for containing the driver circuit may be fixed to a top of the light housing. In another example, the external box may be separate from the light housing but coupled to the light housing via a wire. All such various implementations are covered by the term “coupled to” referred here in the specification and the claims. 
     The LED light apparatus also has a plastic device connector housing and two device conductors. The plastic device connector has a receiver socket for detachably receiving a corresponding plastic plug of the host connector. The two device conductors are respectively disposed in two separate grooves of the plastic device connector housing. 
     Each device conductor has an elongated flat front end exposed for being physically engaged to a metal terminal embedded in the plastic plug of the host connector when the plastic plug of the host connector is inserted into the receiver socket. 
     When the plastic plug of the host connector is inserted into the receiver socket, the metal terminals of the host connector transmits electricity of the external power source to the elongated flat front of the device conductors, and the device conductors further transmit the electricity to the driver circuit. At least a portion of each device conductor is enclosed by the plastic device connector housing. 
     In some embodiments, the receiver socket of the plastic device connector housing has a track for the plastic plug of the host connector to slide in and has a stop structure for ensuring an engagement between the metal terminals of the host connector and the elongated flat front ends of the device conductors. 
     In such case, the plastic device connector housing serves as a female end corresponding to a male end of the host connector. Users of the LED light apparatus may hold the plastic plug of the host connector and insert into the receiver socket of the plastic device connector housing. The stop structure may be a protruding block for stopping the plastic plug entering too much, failing to place its metal terminal at correct contact position with respect to the elongated flat front end. A reverse hook may even be designed on the stop structure to hook the host connector to enhance attachment between the host connector and the plastic device connector housing. 
     The track helps users on guiding the plastic plug into the receiver socket, without causing undesired damage while connecting the two components. 
     In some embodiments, the engagement between the metal terminals of the host connector and the elongated flat front ends form an engagement span. In these embodiments, the elongated flat front ends in the engagement span are kept flat. In other words, in such case, the elongated flat front ends may be an elongated plate without a protruding or bent part thereon. Such design prevents unnecessary damage during connecting the host connector with the plastic device connector housing and the elongated flat front ends, thus increasing life span of the LED light apparatus. 
     In some embodiments, each metal terminal has a main flat part and an elastic curve portion near an end of the main flat part. The elongated flat front end is kept a tilt angle larger than 5 degrees with respect to the main part when the elongated flat front ends engage the metal terminals. With such design, there is a closer engagement when the plastic plug moves into the receiver socket more and more. Such design ensures a tight contact between the elongated flat front ends and the metal terminals, causing a reliable electrical contact for transmitting electricity. 
     In some other embodiments, each metal terminal has a main flat part and an elastic curve portion near an end of the main flat part. The elongated front end has a cavity for receiving the elastic curve portion when the elongated flat front ends engage the metal terminals. Specifically, the elastic curve portion may be deformed until meeting the cavity of the elongated flat front end. The elastic force of the elastic curve portion keeps the metal terminals staying in the cavity of the elongated flat front end to keep a reliable connection between the host connector and the plastic device connector housing. 
     In some embodiments, the device conductor has a tail portion exposed outside the plastic device connector housing. Specifically, the device conductor may be made of a metal sheet. A first end is formed as the elongated flat front end while a second end is formed as the tail portion. A portion of the device conductor is enclosed in the device connector housing while the tail portion is protruding outside the device connector housing. 
     The tail portion is located at an opposite end of the device conductor with respect to the elongated flat front end. The electricity of the external power source is routed firstly from the elongated flat front end and then to the tail portion before moving to the driver circuit. A wire may be disposed between the driver circuit and the device conductor for routing electricity of the external power source to the driver circuit. In other words, in such case, the wire is connected to the tail portion outside the plastic connector housing. 
     In some other embodiments, the tail portion is plugged into a driver socket electrically connected to the driver circuit. For example, the tail portion is a metal pin, the driver socket has an elastic clip. Inversed hooks or other fixing structures may be disposed for fixing the tail portion to the driver socket. In some design, the tail portion may even be a part of the driver socket. In other words, the plastic device connector housing may be inserted into the device conductors. 
     In some embodiments, the device conductor has a tail portion with a fixing structure for fixing the device conductor at a predetermined position of the plastic device connector housing. For example, the plastic device connector housing may have two through holes and the device conductors are respectively inserted into the two through holes. When the fixing structure reaches the predetermined position, the fixing structure, e.g. an inverse hook, the device conductor is fixed with respect to the plastic device connector housing by hooking the fixing structure to a corresponding slot or a blocking structure of the plastic device connector housing. 
     In some embodiments, the fixing structure is a bent hook with a bent angle with respect to the elongated flat front end. The fixing structure may be made by stamping processing applied on an elongated metal sheet. The bent angle with respect to the elongated flat front end may be less than 45 degrees, preferably 10 degrees to 30 degrees. 
     In some embodiments, the plastic device connector housing has an inner cavity for engaging the bent hook of the fixed structure. 
     In some embodiments, multiple protruding bars are formed on a surface of the elongated flat front end along an elongated axis of the elongated flat front end. Such protruding bars may enhance close contact between the device conductors and the metal terminals. 
     In some embodiments, a thickness of the elongated flat front end is smaller than a thickness of the metal terminal of the host connector. Such design may save cost. In addition, the elongated flat front end may be easier for slight deformation for close contact with the metal terminals. 
     In some other embodiments, for other design requirements, a thickness of the elongated flat end is thicker than a thickness of the metal terminal of the host connector. Such design may ensure a longer life span of the LED light apparatus. Furthermore, a larger thickness of conducting paths may reduce certain resistance and avoids unnecessary heat. 
     In some embodiments, the elongated flat front end is firmly fixed to the plastic device connector housing and does not deform even being engaged with the metal terminals. Specifically, a bottom side of the elongated flat front end may be firmly supported by the plastic device connector housing. With such design, the pressing force applied on the elongated flat front end by the metal terminals are transferred to the plastic device connector housing, instead of causing deformation of the elongated flat front end. 
     In some embodiments, the elongated flat front end has a protruding bent portion deformed when engaging with the metal terminal of the host connector. Such protruding bent portion may further correspond to an elastic curve portion of the metal terminal. When the protruding bent portion engages the elastic curve portion, a firm fixing force occurs from deformation of the elastic curve portion and the protruding bent portion. 
     In some embodiments, the light housing and the LED light source form a downlight. The light housing has a back cover. The plastic device connector housing is fixed to the back cover exposing the receiver socket for connecting to the host connector. 
     In some embodiments, the plastic device connector housing has the same color as the host connector, while the plastic device connector has a different color from the light housing. Such design helps users to pick necessary connecting structures easily and guides users to perform necessary connection via visual appearance. Under experiments, such design helps save at least 30% of time on finding how to connect the components for ordinary people. 
     In some embodiments, the elongated flat front end has a chamfer at an engaging end of elongated flat front end facing the host connector. The chamfer is a processed edge so as to prevent undesired damage during engagement of the host connector and the device conductors. 
     In some embodiments, the elongated flat front end has a smaller hardness than the metal terminal of the host connector. The elongated front end, in such design, would be easier to receive the connection of the metal terminal. By adjusting alloy composition, designers may adjust hardness of the device conductors. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a diagram illustrating component relation in an embodiment. 
         FIG. 2A  is a side view diagram illustrating a host connector and a device connector when they are not connected. 
         FIG. 2B  is a side view diagram illustrating the host connector connected to the device connector. 
         FIG. 3  illustrates a tilt angle between a metal terminal and an elongated flat front end. 
         FIG. 4  illustrates another connector embodiment when two connectors are connected. 
         FIG. 5  illustrates a device connector embodiment. 
         FIG. 6  illustrates another view of the embodiment of  FIG. 5 . 
         FIG. 7A  illustrates a device conductor example. 
         FIG. 7B  illustrates another view of the device conductor example of  FIG. 7A . 
         FIG. 7C  illustrates a side view of the device conductor example of  FIG. 7A . 
         FIG. 8A  illustrates engagement between a metal terminal and a device conductor. 
         FIG. 8B  illustrates another view of the example of  FIG. 8A . 
         FIG. 8C  illustrates a side view of the example of  FIG. 8A . 
         FIG. 9  illustrates another embodiment. 
         FIG. 10  illustrates component relation in embodiments like  FIG. 9 . 
         FIG. 11A  shows another embodiment of the device conductor. 
         FIG. 11B  shows another embodiment of the device conductor. 
         FIG. 11C  shows another embodiment of the device conductor. 
         FIG. 11D  shows another embodiment of the device conductor. 
     
    
    
     DETAILED DESCRIPTION 
     Please refer to  FIG. 1 .  FIG. 1  is a diagram illustrating component relation in an embodiment. 
     In  FIG. 1 , a LED light apparatus is designed to be connected to an external power source  1001  via a host connector  16 . The host connector  16  has a plastic plug  161 . In this example, two metal terminals  162  are embedded in the plastic plug  161 . The metal terminals  162  are connected to the external power source  1001  via a wire  1002 . 
     The LED light apparatus includes a light housing  15 . In the light housing  15 , there are a driver circuit  151  and a LED light source  152 . The light housing  15  also has an opening  153  for light of the LED light source  152  to escape out of the LED light apparatus. 
     In this example, there is a wire  14  connecting the driver circuit to tail portions of the device conductors  13 . In this example, there are two device conductors corresponding to two electrical wires of the wire  14 . The device conductors  13  are disposed to the plastic device connector housing  12 . The plastic device connector housing  12  has a receiver socket  121  for receiving the plastic plug  161  of the host connector. When the plastic plug  161  is inserted into the receiver socket  121 , the metal terminals are engaged with elongated flat front ends  131  of the device conductors  13 . 
     According to an embodiment of the present invention, a LED light apparatus is designed for being connected to an external power source via a host connector. 
     The LED light apparatus includes a LED light source and a light housing. The LED light source is disposed in the light housing and the light housing has an opening for light of the LED light source to emit outside the LED light apparatus. 
     The light housing may be designed as a downlight, a spot light, a panel light or other types of light devices. There may be other components like reflectors, diffusion plates, lens, heat sinks, light guide plates disposed in the light housing depending on different design requirements. The LED light source may be disposed on a light source plate or divided into multiple parts disposed on desired positions of the light housing for emitting light to desired angles. 
     The LED light apparatus also has a driver circuit coupled to the light housing for converting the external power source to a driving current supplying to the LED light source. 
     In some embodiments, the driver circuit may be placed in a driver box disposed in the light housing. In some other embodiments, the driver circuit may be disposed directly in the light housing without being placed in a separate container. In some other embodiments, the driver circuit may be disposed in an external box that is connected to the light housing. For example, the external box for containing the driver circuit may be fixed to a top of the light housing. In another example, the external box may be separate from the light housing but coupled to the light housing via a wire. All such various implementations are covered by the term “coupled to” referred here in the specification and the claims. 
     The LED light apparatus also has a plastic device connector housing and two device conductors. The plastic device connector has a receiver socket for detachably receiving a corresponding plastic plug of the host connector. The two device conductors are respectively disposed in two separate grooves of the plastic device connector housing. 
     Each device conductor has an elongated flat front end exposed for being physically engaged to a metal terminal embedded in the plastic plug of the host connector when the plastic plug of the host connector is inserted into the receiver socket. 
     When the plastic plug of the host connector is inserted into the receiver socket, the metal terminals of the host connector transmits electricity of the external power source to the elongated flat front of the device conductors, and the device conductors further transmit the electricity to the driver circuit. At least a portion of each device conductor is enclosed by the plastic device connector housing. 
     Please refer to  FIG. 2A  and  FIG. 2B .  FIG. 2A  is a side view diagram illustrating a host connector and a device connector when they are not connected.  FIG. 2B  is a side view diagram illustrating the host connector connected to the device connector. 
     In  FIG. 2A  and  FIG. 2B , the host connector  21  has a metal terminal  211 , and the device connector  22  has a device conductor that has an elongated flat front end  221  and a tail portion  222 . When the host connector  21  is inserted to the device connector  22 , the metal terminal  211  is engaged with the elongated flat front end. The elongated front end  221  is exposed in the space of the receiver socket so as to contact the metal terminal  211 . 
     In some embodiments, the receiver socket of the plastic device connector housing has a track for the plastic plug of the host connector to slide in and has a stop structure for ensuring an engagement between the metal terminals of the host connector and the elongated flat front ends of the device conductors. 
     In such case, the plastic device connector housing serves as a female end corresponding to a male end of the host connector. Users of the LED light apparatus may hold the plastic plug of the host connector and insert into the receiver socket of the plastic device connector housing. The stop structure may be a protruding block for stopping the plastic plug entering too much, failing to place its metal terminal at correct contact position with respect to the elongated flat front end. A reverse hook may even be designed on the stop structure to hook the host connector to enhance attachment between the host connector and the plastic device connector housing. 
     The track helps users on guiding the plastic plug into the receiver socket, without causing undesired damage while connecting the two components. 
     In some embodiments, the engagement between the metal terminals of the host connector and the elongated flat front ends form an engagement span. In these embodiments, the elongated flat front ends in the engagement span are kept flat. In other words, in such case, the elongated flat front ends may be an elongated plate without a protruding or bent part thereon. Such design prevents unnecessary damage during connecting the host connector with the plastic device connector housing and the elongated flat front ends, thus increasing life span of the LED light apparatus. 
     In some embodiments, each metal terminal has a main flat part and an elastic curve portion near an end of the main flat part. The elongated flat front end is kept a tilt angle larger than 5 degrees with respect to the main part when the elongated flat front ends engage the metal terminals. With such design, there is a closer engagement when the plastic plug moves into the receiver socket more and more. Such design ensures a tight contact between the elongated flat front ends and the metal terminals, causing a reliable electrical contact for transmitting electricity. 
     Please refer to  FIG. 3 .  FIG. 3  illustrates a tilt angle between a metal terminal and an elongated flat front end. 
     In  FIG. 3 , the elongated flat front end  231  is disposed in the plastic device connector housing with a tilt angle  233  with respect to the metal terminal  232 . Therefore, when the metal terminal  232  is inserted to engage the elongated flat front end  231 , the more the metal terminal is inserted, there is a closer contact between the metal terminal  232  and the elongated flat front end  231 . 
     Please refer to  FIG. 4 ,  FIG. 5  and  FIG. 6 .  FIG. 4  illustrates another connector embodiment when two connectors are connected.  FIG. 5  illustrates a device connector embodiment.  FIG. 6  illustrates another view of the embodiment of  FIG. 5 . 
     In  FIG. 4 , a host connector  242  has a plastic plug  2421  inserted into a receiver socket  2411  of a device connector  241 . There is a stop structure  2412 , the wall side of the receiver socket  2411  to limit entering distance of the host connector  242 . 
     In  FIG. 5  and  FIG. 6 , it is illustrated that the device connector  241  has a receiver socket  2411  in its front end and a wire socket  2415  in its back end  2414 . There is also a track structure  2413  for guiding the plastic plug of the host connector to slide into the receiver socket  2411  of the device connector  241 . 
     Please refer to  FIG. 7A ,  FIG. 7B  and  FIG. 7C .  FIG. 7A  illustrates a device conductor example.  FIG. 7B  illustrates another view of the device conductor example of  FIG. 7A .  FIG. 7C  illustrates a side view of the device conductor example of  FIG. 7A . 
     As explained above, the device conductor  27  is disposed in the plastic device connector housing. There is an inverse hook  273  for fixing the device conductor  27  at a predetermined position of the plastic device connector housing. There is also a bent hook  274  for engaging a wire. The device conductor  27  has an elongated flat front end  271  to be engaged with a corresponding metal terminal, as described above. 
     Please refer to  FIG. 8A ,  FIG. 8B  and  FIG. 8C .  FIG. 8A  illustrates engagement between a metal terminal and a device conductor.  FIG. 8B  illustrates another view of the example of  FIG. 8A .  FIG. 8C  illustrates a side view of the example of  FIG. 8A . 
     In  FIG. 8A , a device conductor  28  is engaged with a metal terminal  29 . Specifically, the device conductor  28  has an elongated flat front end  281  engaged with a front end  291  of the metal terminal  29 . There is a curve portion at the front end  291  as illustrated in  FIG. 8B  and  FIG. 8C . In contrast, the elongated flat front end  281  is not curved or bent in the engagement span, but keeps flat in this example. 
     In some other embodiments, each metal terminal has a main flat part and an elastic curve portion near an end of the main flat part. The elongated front end has a cavity for receiving the elastic curve portion when the elongated flat front ends engage the metal terminals. Specifically, the elastic curve portion may be deformed until meeting the cavity of the elongated flat front end. The elastic force of the elastic curve portion keeps the metal terminals staying in the cavity of the elongated flat front end to keep a reliable connection between the host connector and the plastic device connector housing. 
     In some embodiments, the device conductor has a tail portion exposed outside the plastic device connector housing. Specifically, the device conductor may be made of a metal sheet. A first end is formed as the elongated flat front end while a second end is formed as the tail portion. A portion of the device conductor is enclosed in the device connector housing while the tail portion is protruding outside the device connector housing. 
     The tail portion is located at an opposite end of the device conductor with respect to the elongated flat front end. The electricity of the external power source is routed firstly from the elongated flat front end and then to the tail portion before moving to the driver circuit. A wire may be disposed between the driver circuit and the device conductor for routing electricity of the external power source to the driver circuit. In other words, in such case, the wire is connected to the tail portion outside the plastic connector housing. 
     In some other embodiments, the tail portion is plugged into a driver socket electrically connected to the driver circuit. For example, the tail portion is a metal pin, the driver socket has an elastic clip. Inversed hooks or other fixing structures may be disposed for fixing the tail portion to the driver socket. In some design, the tail portion may even be a part of the driver socket. In other words, the plastic device connector housing may be inserted into the device conductors. 
     In some embodiments, the device conductor has a tail portion with a fixing structure for fixing the device conductor at a predetermined position of the plastic device connector housing. For example, the plastic device connector housing may have two through holes and the device conductors are respectively inserted into the two through holes. When the fixing structure reaches the predetermined position, the fixing structure, e.g. an inverse hook, the device conductor is fixed with respect to the plastic device connector housing by hooking the fixing structure to a corresponding slot or a blocking structure of the plastic device connector housing. 
     In some embodiments, the fixing structure is a bent hook with a bent angle with respect to the elongated flat front end. The fixing structure may be made by stamping processing applied on an elongated metal sheet. The bent angle with respect to the elongated flat front end may be less than 45 degrees, preferably 10 degrees to 30 degrees. 
     In some embodiments, the plastic device connector housing has an inner cavity for engaging the bent hook of the fixed structure. 
     In some embodiments, multiple protruding bars are formed on a surface of the elongated flat front end along an elongated axis of the elongated flat front end. Such protruding bars may enhance close contact between the device conductors and the metal terminals. 
     In some embodiments, a thickness of the elongated flat front end is smaller than a thickness of the metal terminal of the host connector. Such design may save cost. In addition, the elongated flat front end may be easier for slight deformation for close contact with the metal terminals. 
     In some other embodiments, for other design requirements, a thickness of the elongated flat end is thicker than a thickness of the metal terminal of the host connector. Such design may ensure a longer life span of the LED light apparatus. Furthermore, a larger thickness of conducting paths may reduce certain resistance and avoids unnecessary heat. 
     In some embodiments, the elongated flat front end is firmly fixed to the plastic device connector housing and does not deform even being engaged with the metal terminals. Specifically, a bottom side of the elongated flat front end may be firmly supported by the plastic device connector housing. With such design, the pressing force applied on the elongated flat front end by the metal terminals are transferred to the plastic device connector housing, instead of causing deformation of the elongated flat front end. 
     In some embodiments, the elongated flat front end has a protruding bent portion deformed when engaging with the metal terminal of the host connector. Such protruding bent portion may further correspond to an elastic curve portion of the metal terminal. When the protruding bent portion engages the elastic curve portion, a firm fixing force occurs from deformation of the elastic curve portion and the protruding bent portion. 
     In some embodiments, the light housing and the LED light source form a downlight. The light housing has a back cover. The plastic device connector housing is fixed to the back cover exposing the receiver socket for connecting to the host connector. 
     Please refer to  FIG. 9  and  FIG. 10 .  FIG. 9  illustrates another embodiment.  FIG. 10  illustrates component relation in embodiments like  FIG. 9 . 
     In  FIG. 9 , the device connector  310 , unlike the examples illustrated in previous drawings, the device connector  310  is directly integrated with a back cover  311  of the light housing  312 . The light housing forms a downlight device with an opening rim  313 . The receiver socket for inserting the plastic plug of the same host connector is kept unchanged. However, the back part of the device connector has a different design. 
     In  FIG. 10 , a back cover, which in this example also used for mounting a driver circuit  311 , is integrated with the device connector  32 . There is still an elongated flat front end  321  of the device conductor facing to a corresponding metal terminal of a host connector. On the other hand, the tail portion  322  of the device conductor is inserted to a socket  332 , which routes electricity to the driver circuit  331 . 
     Please note that there are various alternative ways to mount the device connector to the light housing. For example, the tail portion  322  of the device conductor may be welded directly on a printed circuit board that is used for mounting a driver circuit. 
     In some embodiments, the plastic device connector housing has the same color as the host connector, while the plastic device connector has a different color from the light housing. Such design helps users to pick necessary connecting structures easily and guides users to perform necessary connection via visual appearance. Under experiments, such design helps save at least 30% of time on finding how to connect the components for ordinary people. 
     In some embodiments, the elongated flat front end has a chamfer at an engaging end of elongated flat front end facing the host connector. The chamfer is a processed edge so as to prevent undesired damage during engagement of the host connector and the device conductors. 
     In some embodiments, the elongated flat front end has a smaller hardness than the metal terminal of the host connector. The elongated front end, in such design, would be easier to receive the connection of the metal terminal. By adjusting alloy composition, designers may adjust hardness of the device conductors. 
     Please refer to  FIG. 11A ,  FIG. 11B ,  FIG. 11C  and  FIG. 11D .  FIG. 11A  shows another embodiment of the device conductor.  FIG. 11B  shows another embodiment of the device conductor.  FIG. 11C  shows another embodiment of the device conductor.  FIG. 11D  shows another embodiment of the device conductor. 
     In  FIG. 11A , it is illustrated that an elongated flat front end has a protruding bent portion  342  corresponding to the metal terminal of the host connector. Such design may enhance engagement between the device conductor and the metal terminal. 
     In  FIG. 11B , there are multiple protruding bars  351  are formed on a surface of the elongated flat front end  35  along an elongated axis of the elongated flat front end. 
     In  FIG. 11C , there is a cavity  361  disposed in the elongated flat front end  36  for receiving a curve portion of a metal terminal for enhancing engagement between connectors. 
       FIG. 11D , the device conductor  382  has a tail portion  383  outside the plastic device connector housing  381 . Specifically, the exposed tail portion  383  is attached to a wire  384  outside the plastic device connector housing  381 . 
     In addition to the above-described embodiments, various modifications may be made, and as long as it is within the spirit of the same invention, the various designs that can be made by those skilled in the art are belong to the scope of the present invention.