Abstract:
A capacitor with protection device is mainly used to distribute power supply, and to protect capacitor load. The invention can not only display electrical characteristics, but also distribute electric power to every loader. Furthermore, it can protect the capacitor and load by a protection device, and it saves the time and money necessary to install a protection element.

Description:
BACKGROUND OF THE INVENTION 
     The invention relates to a capacitor with a protection device, and more particularly to a car audio capacitor with a power supply distributor having protection functions. 
     Automotive batteries are usually used to supply the power of a car. However, the power of the battery is inadequate when it comes to handling the specific job of outputting a huge amount of current in a short time, as required by a car stereo. Therefore, the car audio system is usually equipped with a capacitor or a capacitor module parallel therewith. Referring to FIG. 1, a capacitor is connected to a power loader; the capacitor module is installed to enable the audio  81  and amplifier  82  to discharge quickly when a large amount of current is needed. Besides, the added capacitor or capacitor module also can be used as a filter. 
     Although there are advantages in the above-mentioned design, it causes damage to the capacitor, the car stereo and even to the user when the positive and negative electrodes of the capacitor are connected incorrectly. And, it is not convenient to use the capacitor. For example, when a user wants to get the voltage value of the electricity system of the car, an additional meter is needed. It is inconvenient to use a meter for measurement, and one must take time to learn how to use the meter if s/he is not familiar with it. 
     Besides, an electric wire must be used, additional anode and cathode power supply distributors  20  and  30  must be installed, and a protection device  23  is disposed to protect the capacitor and car electrical system when the capacitor is installed in the car. Such equipment is complicated and the installment described above is inconvenient. Therefore, time and money can be saved if the power supply distributors and protection device of the car electrical system are combined together. 
     The object of the invention is to provide a car audio capacitor with more functions, that is capable of not only showing the electrical power characteristics, but also of distributing the power supply and protecting load to the capacitor so as to let the user connect the electric wire onto the capacitor directly. Thereby, the time and money expenses required by the additional installment of power supply distributors and protection devices can be saved. 
     Accordingly, the invention provides a capacitor with power supply distributors and protection devices. It mainly installs a protection device in the anode power supply distributor to protect the capacitor and loader device. And, a digital display is mounted so that the invention can not only display electrical characteristics and distribute the electric power directly to each loader device, but can also protect the capacitor and loader device with the protection device. Thereby, the time and money expenses required by the additional installment of power supply distributors and external protection devices can be saved. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Other objects, features, and advantages of the invention will become apparent from the following detailed description of the preferred but non-limiting embodiments. The description is made with reference to the accompanying drawings in which: 
     FIG. 1 is a schematic view showing the connection between the capacitor and electric power loader device of the prior art; 
     FIG. 2 is a schematic view of a preferred embodiment of the invention showing a capacitor with a protection device; 
     FIG. 3 is a front view of a preferred embodiment of the invention showing a capacitor with a protection device; 
     FIG. 4 is a schematic view of another preferred embodiment of the invention showing a capacitor with a protection device; 
     FIG. 5 is a front view of another preferred embodiment of the invention showing a capacitor with a protection device; 
     FIG. 6 is a schematic view of still another preferred embodiment of the invention showing a capacitor with a protection device. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Please refer to FIG. 2, which illustrates a capacitor body  10 , anode power supply distributors  20  and cathode power supply distributors  30 , which are integrated with a circuit module  40  into one body, upon which a protection cover is mounted. A protection device is installed between cathode power supply distributors  20 . Thereby, a capacitor with a protection device is completed. This provides protection for the capacitor and electric power loader device through the use of the invention. 
     FIG. 3 shows a preferred embodiment of the capacitor with protection device according to the invention. As the figure shows, the capacitor comprises an anode terminal  11  and cathode terminal  12 . The anode terminal  11  is passed through the circuit module  40  to connect with a first conductor  21  of the anode power supply distributor  20 , and the cathode terminal  12  is also passed through the circuit module  40  to connect with the cathode power supply distributor  30 . Moreover, a digital display  41  is mounted on the circuit module  40 . The digital display  41  is used to detect and display the state of the capacitor body  10 . A second conductor  22  is further installed in the anode power supply  20 . A protection element is disposed between the first conductor  21  and second conductor  22 ; the protection element is a plug type fuse  231 . 
     The invention also has a state indication element  42  and state warning element  43  installed therein. The state indication element  42  is a LED, and the state warning element  43  is a speaker. The state indication element  42  lights up when the protection element works normally and is off when the protection element has a broken circuit. Meanwhile, the state warning element  43  emits a warning sound. The state warning element  43  not only emits a warning sound when the protecting element has a broken circuit, but also has the function of detecting voltage. The warning element  43  emits a warning sound when the voltage is higher than 16V or lower than 11V. 
     The first conductor  21  is connected to the anode of a car battery  70 , and one end of the cathode power supply distributor  30  is connected to the cathode of the battery  70 . The second conductor  22  and the other end of the cathode power supply distributor  30  are connected to the electric power loader  80 . Thereby, the electric power of the battery  70  is transmitted to the electric power loader  80  through the circuit arrangement mentioned above. Therefore, the electric power loader  80  can charge the capacitor. Electric power must pass through the protection element first when it is transmitted to the electric power loader  80  so that the protection of the capacitor  10  and electric power loader  80  can be obtained. 
     Please refer to FIGS. 4 and 5, which show another embodiment of the capacitor with protection device of the invention. 
     First, as shown in FIG. 4, the same capacitor body  10 , anode power supply distributor  20 , cathode power supply distributor  30 , circuit module  40  and protection cover  50  are installed. Next, as in FIG. 5, the difference between the second and first embodiment mentioned above is that the first conductor  21  of the anode power supply distributor  20  is connected with a plurality of protection elements. The protection elements are plug type fuses  232 . A plurality of second conductors is also installed at the anode power supply distributor  20 . One end of the protection element is connected to the first conductor  21  and another end thereof is connected to the second conductors  22 . Here, the state warning element  43  and a plurality of state indication elements  42  are disposed accordingly in this embodiment. As mentioned above, the state indication elements  42  are also used to display the work state of each protection element, and the sate warning element  43  is also used to emit a warning sound when the voltage is abnormal or when the protection elements have a short circuit. A plurality of wire holes is also disposed in the cathode power supply distributor  30  for direct distribution of power. 
     FIG.6 shows a capacitor of still another embodiment of the invention. The capacitor at least comprises: a capacitor module  60  assembled by at least one capacitor body  10 , an anode extension board  61 , a cathode extension board  62  and a protection device  23 . The capacitor module  60  is used to provide the working power of the electric power loader  50 . The circuit module, which is disposed with a digital display thereon, is installed in the capacitor module  60 . The digital display  41  can be a LCD or seven steps display. The circuit module  40  is used to detect the electric power state of the capacitor module  60  and the digital display  41  is used to display this state. 
     A plurality of wire holes and connecting holes disposed in the anode extension board  61  is used to distribute the anode power supply of the capacitor module. At least one set of wire holes and connecting holes disposed in the cathode extension board  62  is used to distribute the cathode power supply of the capacitor module  60 . A protection element, state indication element  42  and state warning element  43  are disposed in the protection device  23 . The protection element can be a general fuse  232  or a plug type fuse  231 . Its input end is connected to the anode power supply of the capacitor  60 , and its output end is connected to the anode extension board  61 . The state indication element  42  may be an LED, and is connected to the protection device  23  to form a loop. The state warning element  43  is a speaker. 
     The protection device  23  forms an open circuit when the working power supply is overloaded in order to protect the capacitor and electric loader  50 . The display element  42  lights up during normal operation, and is off when the protection device  23  forms a close circuit. Moreover, the state warning element  43  can detect voltage, and it emits a warning sound when the voltage is higher than 16V or lower than 11V. 
     The invention provides a capacitor with a power supply distributor in order to distribute power. A protection device is also installed therein to protect the capacitor and electric power loader. Therefore, the invention can reduce the expenses required for installment of a power supply distribution and protection device, and protect the device and circuit. 
     It is noted that the preferred embodiments of the capacitor with protection device of the invention have been described for the purpose of illustration only, and are not intended as a definition of the limits and scope of the invention disclosed. Any modifications and variations that may be apparent to a person skilled in the art are intended to be included within the scope of the following claims.