Abstract:
A cutter used for cutting sheet material includes a cutting board, a knife rack and two pairs of knife wheels. The cutting board allows the sheet material to be laid on and has a guiding track. The knife rack is arranged on the cutting board and is able to slide along with the guiding track. One inner side of the knife rack near the guiding track is provided with two pairs of knife grooves, and two guiding grooves are provided on the knife rack between the two pairs of knife grooves respectively, and the two guiding grooves are used to guide the cut sheet material to leave. The two knife wheels are installed inside the upper and lower pairs of knife grooves of the knife rack.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    This present invention relates to a connection port socket structure, particularly to a connection port socket structure which is able to be used as a control circuit. 
         [0003]    2. Related Art 
         [0004]    Due to the trend of lightweight and thin electrical devices, users are getting used to carrying these electrical devices. The most common electrical devices, like the mobile phone, PDA, portable computer, tablet computer, digital camera, or digital cam recorder, have been commonly used by consumers around the world, and become an essential part of the modern life. 
         [0005]    The aforementioned electrical devices have been carry-on products for users nowadays. Since those electrical devices are continuously used for a very long time, which drains the battery very quickly, the demand of fast charging has become noticeable to the market. For now, there are numerous charging voltages of the electrical devices on the market, the voltages ranging from 3.3 V to 12V. Eventually, the voltage adjustable charging products have also been released to the market. However, damage to an electrical device can happen if the consumers accidentally connect the none-high voltage resistant electrical devices to a high voltage charging device. 
       BRIEF SUMMARY 
       [0006]    The present invention provides a connection port socket structure which connects to a charging circuit or boost and buck circuits. When the connection port socket structure is disconnected from the connection port plug structure, the voltage of the charging circuit or the boost and buck circuits can be immediately adjusted. 
         [0007]    The present invention provides a connection port socket structure that includes a plurality of pins, and at least two pins have a switch interface provided therebetween. By this arrangement, the charging and discharging circuits, boost and buck circuits, or any other startup circuits can easily protect the uncharged device and circuit controlling by using the connection port socket structure with a switch interface. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0008]    These and other features and advantages of the various embodiments disclosed herein will be better understood with respect to the following description and drawings, in which like numbers refer to like parts throughout, and in which: 
           [0009]      FIG. 1  is a schematic diagram of a preferred embodiment according to the present invention; 
           [0010]      FIG. 2  is a first schematic application diagram of a first preferred embodiment according to the present invention; 
           [0011]      FIG. 3  is a second schematic application diagram of the first preferred embodiment according to the present invention; 
           [0012]      FIG. 4  is a first schematic application diagram of a second preferred embodiment according to the present invention; 
           [0013]      FIG. 5  is a second schematic application diagram of the second preferred embodiment according to the present invention; 
           [0014]      FIG. 6  is a first schematic application diagram of a third preferred embodiment according to the present invention; and 
           [0015]      FIG. 7  is a second schematic application diagram of the third preferred embodiment according to the present invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0016]    Please refer to  FIG. 1 , the connection port socket structure  10  can have a plurality of pins. In this preferred embodiment, there are  4  pins in the connection port structure  10 , but not limited thereto. The four pins are respectively defined as a first pin  11 , a second pin  12 , a third pin  13 , and a fourth pin  14 . At least two pins of these four pins have a switch interface  15  provided therebetween. However, the switch interface  15  can be provided between any two of the four pins. In this preferred embodiment, one switch interface  15  is provided between the second pin  12  and the third pin  13 , but not limited thereto. The connection port socket structure  10  can be a USB socket structure, a micro USB socket structure or any other equivalent structures which can transfer electricity or signal. 
         [0017]    Please refer to  FIGS. 2 and 3 , which are the first preferred embodiment of the present invention. The connection port socket structure  10  can connect or disconnect with a connection port plug structure  20 . When the connection port socket structure  10  disconnects with the connection port plug structure  20 , the switch interface  15  is in a first state. In the present embodiment, the first state is in a conduction status. When the connection port socket structure  10  connects with the connection port plug structure  20 , the switch interface  15  is in a second state. In the present embodiment, the second state is in an open circuit status. The connection port plug structure  20  can be a USB plug structure, micro USB plug structure or any other equivalent structures which can transfer electricity or signal. 
         [0018]    The present embodiment can further connect to a charging circuit  40 . The charging circuit  40  has a buck unit  42 , and the buck unit  42  couples to the switch interface  15 . When the buck unit  42  is in an operating status, the charging circuit  40  can provide an initial voltage value. Therefore, when the connection port socket structure  10  connects with the connection port plug structure  20 , the switch interface  15  is in a second state (open circuit), thereby preventing the buck unit  42  from working. Meanwhile, the charging circuit  40  can transfer the electricity to an uncharged device  30  which connects to the connection port plug structure  20 . The uncharged device  30  can transfer a signal to the charging circuit  40  to increase the initial voltage to a charging voltage of the uncharged device  30 . 
         [0019]    When the connection port socket structure  10  disconnects with the connection port plug structure  20 , the switch interface  15  is in a first state (conduction status), thereby enabling the buck unit  42  to work, and the increased voltage of the charging circuit  40  can be decreased to the initial voltage. If there is another uncharged device which has lower voltage resistance than the previously increased voltage of the charging circuit  40 , the uncharged device might be damaged due to the high charging voltage. Thus, the arrangement of the connection port socket structure  10  and the charging circuit  40  can form a protection device to the charging device. 
         [0020]    Please refer to  FIGS. 4 and 5 , which are the second preferred embodiment of the present invention. The difference of the present embodiment compared with the previous embodiment is that the first state in the present embodiment is in an open circuit status, and the second state is in a conduction status. 
         [0021]    The present embodiment, the connection port socket structure  10  can connect to a boost circuit  50 . The boost circuit  50  has a voltage control unit  52 . The voltage control unit  52  couples to the switch interface  15 . When the voltage control unit  52  is not in a working condition, the boost circuit  50  can provide an initial voltage. When the voltage control unit  52  is in a working condition, the boost circuit  50  can provide a voltage higher than the initial voltage. Therefore, when the connection port socket structure  10  connects with the connection port plug structure  20 , the switch interface  15  is in a second state (conduction status), and the voltage control unit  52  can increase the initial voltage of the boost circuit  50  to a higher voltage. By doing so, the uncharged device  30  which connects to the connection port plug structure  20  will not fail to obtain a desired voltage due to the voltage drop between the two different wires. 
         [0022]    When the connection port socket structure  10  disconnects with the connection port plug structure  20 , the switch interface  15  is in a first state (open circuit status), and the voltage control unit  52  will not be able to work, thereby decreasing the voltage of the boost circuit  50  to the initial voltage. 
         [0023]    Furthermore, the connection port socket structure  10  according to the present invention can connect to a buck circuit (not shown in the FIG.) by the circuit design, or the first state can be changed to conduction status, and the second state can be changed to open circuit status, so as to protect the uncharged device. 
         [0024]    Please refer to  FIGS. 6 and 7 , which are the third preferred embodiment of the present invention. The connection port socket structure  10  can have a plurality of pins. In this preferred embodiment, there are  4  pins in the connection port structure  10 , but not limited thereto. The four pins are respectively defined as a first pin  11 , a second pin  12 , a third pin  13 , and a fourth pin  14 . The switch interface  15  can be provided between any two of the four pins. In the present embodiment, the connection port socket structure  10  has two switch interfaces  15   a,    15   b . The switch interface  15   a  is provided between the first pin  11  and the second pin  12 , and the switch interface  15   b  is provided between the third pin  13  and the fourth pin  14 , but not limited thereto. 
         [0025]    When the connection port socket structure  10  disconnects with the connection port plug structure  20 , the two switch interfaces  15   a,    15   b  are in a first state (open circuit status); By contrast, when the connection port socket structure  10  connects with the connection port plug structure  20 , one of the two switch interfaces  15   a,    15   b  can be in a second state (conduction status) by the design of the connection port plug structure  20 . 
         [0026]    The connection port socket structure  10  of the present embodiment can also connect to a boost/buck circuit  60 , and the boost/buck circuit  60  has a voltage control unit  62  coupling to the two switch interfaces  15   a,    15   b.  When the connection port socket structure  10  connects with the connection port plug structure  20 , one of the two switch interfaces  15   a,    15   b  can be in a second state (conduction status) by the design of the connection port plug structure  20 . By this arrangement, the voltage control unit  62  will decide increasing the initial voltage of the boost/buck circuit  60  to a higher voltage or decreasing the voltage to a lower voltage. 
         [0027]    By contrast, when the connection port socket structure  10  disconnects with the connection port plug structure  20 , the two switch interfaces  15   a,    15   b  are in a first state (open circuit status), and the voltage control unit  52  is not able to work, thereby decreasing the voltage of the boost/buck circuit  60  to the initial voltage. 
         [0028]    By the design of the circuit, the connection port socket structure  10  according to the third embodiment of the present invention can change the first state to be conduction status, and the second state can also be changed to open circuit status. For example, when the connection port socket structure  10  connects with the connection port plug structure  20 , one of the two switch interfaces  15   a,    15   b  can be in a second state (open circuit status), and the other one of the two switch interfaces  15   a,    15   b  can be in a first state (conduction status) by the design of the connection port plug structure  20 , thereby deciding the voltage of the boost/buck circuit  60 . By this arrangement, the goal of protecting the uncharged device  30  can be achieved. 
         [0029]    Although the present invention has been described with reference to the foregoing preferred embodiments, it will be understood that the invention is not limited to the details thereof Various equivalent variations and modifications can still occur to those skilled in this art in view of the teachings of the present invention. Thus, all such variations and equivalent modifications are also embraced within the scope of the invention as defined in the appended claims.