Abstract:
A transmission port module adapted to an electronic device is disclosed. The electronic device includes a casing whereon a containing slot is formed. According to an embodiment, the transmission port module includes at least one transmission port and a housing covering the at least one transmission port. The housing is installed inside the containing slot in a detachable manner, such that the at least one transmission port is hidden inside the casing as being not in use by detachment and installation of the housing. According to another embodiment, the transmission port module includes at least one transmission port and a rotational holder. The rotational holder holds the at least one transmission port and drives the at least one transmission port to rotate relative to the casing, such that the at least one transmission port is hidden inside the casing as being not in use by rotation of the rotational holder.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a transmission port module, and more particularly, to a transmission port module containable inside a casing of an electronic device in a detachable manner or in a rotable manner. 
         [0003]    2. Description of the Prior Art 
         [0004]    Generally speaking, a notebook computer is equipped with a transmission port module and a plurality of transmission ports, such as a power supply port, an audio jack, a Micro Universal Serial Bus, Micro USB, a High Definition Multimedia Interface, HDMI, and an Ethernet port, for transmitting signals with an external electronic device, so as to enhance flexibility of the notebook computer in use. 
         [0005]    A conventional transmission port module is disposed on a side, such as aback side or a lateral side, of a host module of the notebook computer. However, no matter the transmission port module is disposed on the back side or on the lateral side of the host module of the notebook computer, the transmission port module is exposed on a host casing of the notebook computer, and thus it reduces aesthetic feeling of the notebook computer. In addition, since the conventional transmission port module is fixed on the host module of the notebook computer, the transmission port module can not be contained inside the host casing as being not in use. Accordingly, objects, such as dusts, are attached to the transmission port module or enter the host module from the transmission port module, so as to damage internal components of the host module and thus cause the notebook computer to function abnormally. 
       SUMMARY OF THE INVENTION 
       [0006]    The present invention provides a transmission port module containable inside a casing of an electronic device in a detachable manner or in a rotable manner for solving above drawbacks. 
         [0007]    According to the claimed invention, a transmission port module adapted to an electronic device with a casing whereon a containing slot is formed is disclosed. The transmission port module includes at least one transmission port and a housing. The at least one transmission port is for transmitting signals with a circuit board disposed inside the casing. The housing covers the at least one transmission port, and the housing has a first side whereon the at least one transmission port is exposed and a second side. The housing is installed inside the containing slot in a detachable manner, such that the at least one transmission port is exposed on the casing when the housing is installed inside the containing slot with the first side oriented towards outside of the casing, or such that the at least one transmission port is hidden inside the containing slot when the housing is installed inside the containing slot with the second side oriented towards outside of the casing. 
         [0008]    According to the claimed invention, the transmission port module further includes an integrated circuit board disposed inside the housing for being coupled to the at least one transmission port. 
         [0009]    According to the claimed invention, the transmission port module further includes a connecting contact and a transmission cable. The connecting contact is coupled to the integrated circuit board and disposed on a third side of the housing. The transmission cable is disposed inside the containing slot. A first end of the transmission cable is coupled to the circuit board, and a second end of the transmission cable is coupled to the connecting contact when the housing is installed inside the containing slot with the first side oriented towards outside of the casing, so as to be electrically connected to the circuit board, the integrated circuit board and the at least one transmission port. 
         [0010]    According to the claimed invention, the transmission cable includes a first connecting contact and a second connecting contact. The first connecting contact is disposed on the first end, and the first connecting contact is coupled to the circuit board in an inserting manner. The second connecting contact is disposed on the second end, and the second connecting contact is coupled to the connecting contact in a tightly contacted manner. 
         [0011]    According to the claimed invention, the first connecting contact and the second connecting contact are respectively a gold finger contact, and the connecting contact is a spring-armed connecting contact. 
         [0012]    According to the claimed invention, the first end of the transmission cable is soldered to the circuit board. The transmission cable includes a gold finger contact disposed on the second end, the connecting contact is a spring-armed connecting contact, and the gold finger contact is coupled to the spring-armed contact in a tightly contacted manner. 
         [0013]    According to the claimed invention, the transmission cable includes a circuit board connecting portion, a contact connecting portion and a bridging portion. The circuit board connecting portion extends from the first end, and the contact connecting portion extends from the second end. The contact connecting portion is attached to a side of the containing slot corresponding to the connecting contact. The bridging portion is connected to the circuit board connecting portion and the contact connecting portion, and the bridging portion is disposed on a lateral side of the containing slot along the housing. 
         [0014]    According to the claimed invention, the transmission cable is a flexible printed circuit. 
         [0015]    According to the claimed invention, the at least one transmission port includes a power supply port, an audio jack, a Micro Universal Serial Bus, a High Definition Multimedia Interface or an Ethernet port. 
         [0016]    According to the claimed invention, a transmission port module adapted to an electronic device with a casing whereon a containing slot is formed is disclosed. The transmission port module includes at least one transmission port and a rotably holding member. The at least one transmission port is for transmitting signals with a circuit board disposed inside the casing. The rotably holding member is pivoted to the casing in a position corresponding to an opening of the containing slot. The rotably holding member is for holding the at least one transmission port and rotates the at least one transmission port relative to the casing, such that the at least one transmission port is exposed towards outside of the casing when the rotably holding member rotates to an in-use position, or such that the at least one transmission port is hidden inside the containing slot when the rotably holding member rotates to a containing position. 
         [0017]    According to the claimed invention, the transmission port module further includes an integrated circuit board coupled to the at least one transmission port. The integrated circuit board is engaged with the rotably holding member, such that the rotably holding member holds the at least one transmission port and rotates the at least one transmission port relative to the casing. 
         [0018]    According to the claimed invention, the transmission port module further includes a connecting contact and a transmission cable. The connecting contact is coupled to the integrated circuit board. The transmission cable is disposed inside the containing slot. A first end of the transmission cable is coupled to the circuit board, and a second end of the transmission cable is coupled to the connecting contact, so as to be electrically connected to the circuit board, the integrated circuit board and the at least one transmission port. 
         [0019]    According to the claimed invention, the transmission port module further includes a first connecting contact and a second connecting contact. The first connecting contact disposed on the first end, and the first connecting contact is coupled to the circuit board in an inserting manner. The second connecting contact is disposed on the second end, and the second connecting contact is coupled to the connecting contact in an inserting manner. 
         [0020]    According to the claimed invention, the first connecting contact and the second connecting contact are respectively a gold finger contact. 
         [0021]    According to the claimed invention, the first end of the transmission cable is soldered to the circuit board, and the second end of the transmission cable is soldered to the connecting contact. 
         [0022]    According to the claimed invention, the transmission port module further includes a pivotal shaft member fixed on the rotably holding member for pivoting the rotably holding member to the casing. 
         [0023]    According to an embodiment, the transmission port of the transmission port module of the present invention is disposed inside the housing, and the housing is detachably installed inside the containing slot on the casing of the electronic device. When the transmission port of the transmission port module is in use, the housing is installed inside the containing slot with the transmission port oriented towards outside of the casing of the electronic device, i.e. the first side oriented towards outside of the casing. Accordingly, the transmission port of the transmission port module is exposed on the casing for a user to use. When the transmission port of the transmission port module is not in use, the housing is installed inside the containing slot with the transmission port oriented towards inside of the casing of the electronic device, i.e. the second side oriented towards outside of the casing. Accordingly, the transmission port of the transmission port module is hidden inside the casing. 
         [0024]    According to another embodiment, the transmission port of the transmission port module is held on the rotably holding member, and the rotably holding member is pivoted to the casing in the position corresponding to the opening of the containing slot. When the transmission port of the transmission port module is in use, the rotably holding member rotates to the in-use position. At the same time, the transmission port of the transmission port module is exposed on the casing for a user to use. When the transmission port of the transmission port module is not in use, the rotably holding member rotates to the containing position. At the same time, the transmission port of the transmission port module is hidden inside the casing. 
         [0025]    In summary, the transmission port of the transmission port module of the present invention is capable of being contained inside the casing in a detachable or rotable manner as being not in sue, so as to keep appearance integrity of the casing of the electronic device. Accordingly, it can enhance aesthetic feeling of the electronic device and further prevent objects, such as dusts from being attached to the transmission port or entering the electronic device from the transmission port. As a result, it can prevent internal components of the electronic device from damage and keep the electronic device function normally. 
         [0026]    These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0027]      FIG. 1  is a schematic diagram of an electronic device according to a first embodiment of the invention. 
           [0028]      FIG. 2  is a partly exploded diagram of the electronic device according to the first embodiment of the invention. 
           [0029]      FIG. 3  is a diagram of a transmission port module according to the first embodiment of the invention. 
           [0030]      FIG. 4  is a partly exploded diagram of the transmission port module and the electronic device in another status according to the first embodiment of the invention. 
           [0031]      FIG. 5  is a schematic diagram of the electronic device in another status according to the first embodiment of the invention. 
           [0032]      FIG. 6  is an internal diagram of the transmission port module according to the first embodiment of the invention. 
           [0033]      FIG. 7  is an internal diagram of the electronic device according to the first embodiment of the invention. 
           [0034]      FIG. 8  is a diagram of a transmission cable according to the first embodiment of the invention. 
           [0035]      FIG. 9  is a diagram of a transmission port module according to a second embodiment of the invention. 
           [0036]      FIG. 10  is a diagram of the transmission port module in an in-use status according to the second embodiment of the invention. 
           [0037]      FIG. 11  is a diagram of the transmission port module in a containing status according to the second embodiment of the invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0038]    Please refer to  FIG. 1 .  FIG. 1  is a schematic diagram of an electronic device  30  according to a first embodiment of the invention. As shown in  FIG. 1 , the electronic device  30  includes a casing  32  for covering internal components, such as a circuit board, cables and so on, of the electronic device  30 . In this embodiment, the electronic device  30  is an external keyboard module adapted to a portable electronic device  34 , such as a tablet computer. The implementation of the electronic device  30  is not limited to that mentioned above. For example, the electronic device  30  can also be a notebook computer, a personal digital assistant, a desktop computer and so on. As for which one of the above-mentioned designs is adopted, it depends on practical demands. 
         [0039]    Please refer to  FIG. 1  and  FIG. 2 .  FIG. 2  is a partly exploded diagram of the electronic device  30  according to the first embodiment of the invention. As shown in  FIG. 1  and  FIG. 2 , the electronic device  30  further includes a transmission port module  36 , and a containing slot  321  is formed on the casing  32  for containing the transmission port module  36 . Please refer to  FIG. 2  and  FIG. 3 .  FIG. 3  is a diagram of the transmission port module  36  according to the first embodiment of the invention. As shown in  FIG. 2  and  FIG. 3 , the transmission port module  36  includes five transmission ports  38 , which are a power supply port, an audio jack, a Micro Universal Serial Bus (Micro USB), a High Definition Multimedia Interface (HDMI) and an Ethernet port, respectively. An amount and variety of the transmission port  38  of the transmission port module  36  is not limited to those illustrated in this embodiment, and it depends on practical demands. 
         [0040]    In addition, the transmission port module  36  further includes a housing  40  for covering the transmission ports  38 . A shape of the housing  40  of the transmission port module  36  is substantially identical to a contour of the containing slot  321  on the casing  32 , and the housing  40  has a first side S 1  and a second side S 2  opposite to the first side S 1 . In this embodiment, the transmission ports  38  are exposed on the first side S 1 , as shown in  FIG. 3 , and the housing  40  is installed inside the containing slot  321  on the casing  32  in a detachable manner, as shown in  FIG. 1  and  FIG. 2 . Furthermore, the housing  40  of the transmission port module  36  is a substantially axially symmetric structure. In other words, when the housing  40  is rotated about an axis A shown in  FIG. 3  by 180 degrees, the shape of the housing  40  before rotation is substantially identical to the shape of the housing  40  after rotation. 
         [0041]    Please refer to  FIG. 3  to  FIG. 5 .  FIG. 4  is a partly exploded diagram of the transmission port module  36  and the electronic device  30  in another status according to the first embodiment of the invention.  FIG. 5  is a schematic diagram of the electronic device  30  in another status according to the first embodiment of the invention. As shown in  FIG. 3  to  FIG. 5 , when the transmission port module  36  is rotated about the axis A in  FIG. 3  from a status shown in  FIG. 3  to a status shown in  FIG. 4  in a first direction X 1  or in a second direction X 2  opposite to the first direction X 1 , i.e. when the transmission port module  36  is rotated by 180 degrees from the status shown in  FIG. 3  in the first direction X 1  or in the second direction X 2 , the shape of the housing  40  that the transmission port module  36  is in the status shown in  FIG. 3  is substantially identical to the shape of the housing  40  that the transmission port module  36  is in the status shown in  FIG. 4  since the housing  40  of the transmission port module  36  is substantially axially symmetric as mentioned above. 
         [0042]    Thus, both of the housing  40  of the transmission port module  36  in the status shown in  FIG. 3  and the housing  40  of the transmission port module  36  in the status shown in  FIG. 4  can be installed inside the containing slot  321  on the casing  32 . Accordingly, the transmission ports  38  can be installed inside the containing slot  321  on the casing  32  with the first side S 1  oriented towards outside of the casing  32 , such that the transmission ports  38  disposed on the first side S 1  can be exposed on the casing  32 , as shown in  FIG. 1 . Alternatively, the transmission ports  38  can be installed inside the containing slot  321  on the casing  32  with the second side S 2  oriented towards outside of the casing  32 , such that the transmission ports  38  disposed on the first side S 1  can be hidden inside the containing slot  321  on the casing  32 , as shown in  FIG. 5 . 
         [0043]    In summary, when the transmission ports  38  of the transmission port module  36  are in use, the housing  40  of the transmission port module  36  is installed inside the containing slot  321  with the first side S 1  oriented towards outside of the casing  32  of the electronic device  30 . In such a manner, the transmission ports  38  of the transmission port module  36  can be exposed on the casing  32 , such that the electronic device  30  can be coupled to other external electronic devices by the transmission ports  38 . When the transmission ports  38  of the transmission port module  36  are not in use, first of al, the housing  40  of the transmission port module  36  is pulled from the containing slot  321  on the casing  32  of the electronic device  30 , i.e. in the status shown in  FIG. 1 , to the status shown in  FIG. 2 . Then, the housing  40  is rotated in the first direction X 1  or in the second direction X 2  from the status in  FIG. 3  to the status in  FIG. 4 . Finally, the transmission port module  36  with the status shown in  FIG. 4  is installed inside the containing slot  321 . At the same time, the housing  40  of the transmission port module  36  is installed inside the containing slot  321  with the second side S 2  oriented towards outside of the casing  32  of the electronic device  30 . 
         [0044]    In such a manner, the transmission ports  38  can be hidden inside the containing slot  321 , as shown in  FIG. 5 , so as to keep appearance integrity of the casing  32  of the electronic device  30 . Accordingly, it can enhance aesthetic feeling of the electronic device  30  and further prevent objects, such as dusts, from being attached to the transmission ports  38  or entering the electronic device  30  from the transmission ports  38 , so as to prevent damage of internal components of the electronic device  30  and keep the electronic device  30  to function normally. 
         [0045]    Please refer to  FIG. 6 .  FIG. 6  is an internal diagram of the transmission port module  36  according to the first embodiment of the invention. As shown in  FIG. 6 , the transmission port module  36  further includes an integrated circuit board  42  and a connecting contact  44 . The integrated circuit board  42  is disposed inside the housing  40 , and the connecting contact  44  is disposed on a third side S 3  of the housing  40 . In this embodiment, the third side S 3  can be, but not limited to, a top side of the housing  40 . For example, the third side S 3  can be a bottom side of the housing  40  as well. As for which one of the above-mentioned designs is adopted, it depends on practical demands. Furthermore, the integrated circuit board  42  is used for being coupled to the transmission ports  38  and the connecting contact  44 , such that the transmission ports  38  can be coupled to the external components, such as cables, connectors and so on, via the integrated circuit board  42  and the connecting contact  44 . 
         [0046]    Please refer to  FIG. 7 .  FIG. 7  is an internal diagram of the electronic device  30  according to the first embodiment of the invention. As shown in  FIG. 7 , the electronic device  30  further includes a circuit board  46  disposed inside the casing  32 . In this embodiment, the circuit board  46  is a main board for processing signals between the electronic device  30  and the portable electronic device  34 . Accordingly, it can help a user to perform affairs, such as documentation, instruction input and so on, by the electronic device  30 . In addition, the transmission port module  36  further includes a transmission cable  48  disposed inside the containing slot  321  on the casing  32 . Please refer to  FIG. 7  and  FIG. 8 .  FIG. 8  is a diagram of the transmission cable  48  according to the first embodiment of the invention. As shown in  FIG. 7  and  FIG. 8 , the transmission cable  48  has a first end P 1  and a second end P 2  opposite to the first end P 1 . A first end P 1  of the transmission cable  48  is coupled to the circuit board  46 . When the housing  40  of the transmission port module  36  is installed inside the containing slot  321  on the casing  32  with the side S 1  oriented towards outside of the casing  32  of the electronic device  30 , the second end P 2  of the transmission cable  48  is coupled to the connecting contact  44 . 
         [0047]    As mentioned above, since the first end P 1  of the transmission cable  48  is coupled to the circuit board  46  and the transmission ports  38  of the transmission port module  36  are coupled to the connecting contact  44  by the integrated circuit board  42 , the transmission ports  38  of the transmission port module  36  can be coupled to the circuit board  46  of the electronic device  30  via the integrated circuit board  42 , the connecting contact  44  and the transmission cable  48  in sequence when the housing  40  of the transmission port module  36  is installed inside the containing slot  321  with the side S 1  oriented towards outside of the casing  32  of the electronic device  30  for coupling the second end P 2  of the transmission cable  48  to the connecting contact  44 . In other words, when the housing  40  of the transmission port module  36  is installed inside the containing slot  321  with the side S 1  oriented towards outside of the casing  32  of the electronic device  30 , the transmission cable  48  is used for coupling the circuit board  46  and the transmission ports  38 , such that the signals can be transmitted between the transmission cable  48  and the circuit board  46  disposed inside the casing  32 . Accordingly, the electronic device  30  can be coupled to an external electronic device, so as to enhance flexibility of the electronic device  30 . 
         [0048]    As shown in  FIG. 7  and  FIG. 8 , the transmission cable  48  can include a first connecting contact  481  and a second connecting contact  483 . The first connecting contact  481  is disposed on the first end P 1  of the transmission cable  48 , and the second connecting contact  483  is disposed on the second end P 2  of the transmission cable  48 . In this embodiment, the first connecting contact  481  and the second connecting contact  483  are respectively a gold finger contact, and the connecting contact  44  of the transmission port module  36  is a spring-armed connecting contact. The first connecting contact  481  of the transmission cable  48  is coupled to the circuit board  46  of the electronic device  30  in an inserting manner during assembly. Furthermore, the second connecting contact  483  of the transmission cable  48  presses the connecting contact  44  of the transmission port module  36  when the housing  40  of the transmission port module  36  is installed inside the containing slot  321  with the side S 1  oriented towards outside of the casing  32  of the electronic device  30 , such that the second connecting contact  483 , i.e. the gold finger contact, of the transmission cable  48  is coupled to the connecting contact  44  of the transmission port module  36  in a tightly contacted manner. In this embodiment, the transmission cable  48  is a Flexible Printed Circuit, FPC. 
         [0049]    The way to couple the transmission cable  48  and the circuit board  46  is not limited to those mentioned in this embodiment. For example, the first end P 1  of the transmission cable  48  can be soldered to the circuit board  46  as well. Accordingly, the transmission cable  48  can omit the first connecting contact  481 . In other words, the first connecting contact  481  can be omitted in this embodiment for saving cost of manufacture. As for which one of the above-mentioned designs is adopted, it depends on practical demands. 
         [0050]    As shown in  FIG. 7  and  FIG. 8 , the transmission cable  48  can further include a circuit board connecting portion  485 , a contact connecting portion  487  and a bridging portion  489 . The circuit board connecting portion  485  extends from the first end P 1  of the transmission cable  48 , the contact connecting portion  487  extends from the second end P 2  of the transmission cable  48 , and the bridging portion  489  is connected to the circuit board connecting portion  485  and the contact connecting portion  487 . When the transmission cable  48  is installed inside the containing slot  321  on the casing  32 , the circuit board connecting portion  485  is attached to a side of the containing slot  321  corresponding to the connecting contact  44 . In other words, the contact connecting portion  487  is attached to a side of the containing slot  321  corresponding to the third side S 3  of the housing  40  of the transmission port module  36 , and the bridging portion  489  is disposed on a lateral side of the containing slot  321  along the housing  40  of the transmission port module  36 . 
         [0051]    In other words, the contact connecting portion  487  and the bridging portion  489  of the transmission cable  48  are attached to a periphery of the containing slot  321  on the casing  32  corresponding to the shape of the housing  40  of the transmission port module  36 , respectively, so as to allow the containing slot  321  to have sufficient space. In such a manner, the transmission port module  36  can be installed inside the containing slot  321  more smoothly, or be detached from the containing slot  321  more smoothly. Shapes of the circuit board connecting portion  485 , the contact connecting portion  487  and the bridging portion  489  of the transmission cable  48  are not limited to those illustrated in this embodiment, and it depends on practical demands. 
         [0052]    Please refer to  FIG. 9  to  FIG. 11 .  FIG. 9  is a diagram of a transmission port module  70  according to a second embodiment of the invention.  FIG. 10  is a diagram of the transmission port module  70  in an in-use status according to the second embodiment of the invention.  FIG. 11  is a diagram of the transmission port module  70  in a containing status according to the second embodiment of the invention. As shown in  FIG. 9  to  FIG. 11 , the main difference between the transmission port module  70  and the aforesaid transmission port module  36  is that the transmission port module  70  includes a rotably holding member  72  pivoted to the casing  32  of the electronic device  30  in a position corresponding to an opening of the containing slot  321 . The rotably holding member  72  is used for holding the transmission ports  38  and rotating the transmission ports  38  relative to the casing  32  of the electronic device  30 . 
         [0053]    In this embodiment, the integrated circuit board  42  is engaged with the rotably holding member  72 . Since the integrated circuit board  42  is coupled to the transmission ports  38 , the rotably holding member  72  is capable of holding the transmission ports  38  by engaging with the integrated circuit board  42 , and further rotates the transmission ports  38  relative to the casing  32  of the electronic device  30 . Designs of fixing the integrated circuit board  42  and the rotably holding member  72  are not limited to those mentioned in this embodiment. For example, the integrated circuit board  42  can be screwed on the rotably holding member  72  as well. As for which one of the above-mentioned designs is adopted, it depends on practical demands. 
         [0054]    In addition, the transmission port module  70  further includes a pivotal shaft member  74  fixed on the rotably holding member  72 . The pivotal shaft member  74  is used for pivoting the rotably holding member  72  to the casing  32  of the electronic device  30 , such that the rotably holding member  72  is capable of rotating the transmission ports  38  of the transmission port module  70  relative to the casing  32  from an in-use position shown in  FIG. 10  to a containing position shown in  FIG. 11 , or such that the rotably holding member  72  is capable of rotating the transmission ports  38  of the transmission port module  70  relative to the casing  32  from the containing position shown in  FIG. 11  to the in-use position shown in  FIG. 10 . 
         [0055]    In this embodiment, the pivotal shaft member  74  and the rotably holding member  72  can be, but not limited to, integrally formed. For example, the pivotal shaft member  74  and the rotably holding member  72  can be two separate parts as well, and the pivotal shaft member  74  is fixed on the rotably holding member  72  in a tight fit manner or in an inserting molding manner when assembling. In other words, structures of the pivotal shaft member  74  capable of pivoting the rotably holding member  72  to the casing  32  are within the scope of the present invention. 
         [0056]    Furthermore, the transmission port module  70  further includes a connecting contact  76  and a transmission cable  80 . The connecting contact  76  is coupled to the integrated circuit board  42 , and the transmission cable  80  is disposed inside the containing slot  321  on the casing  32 . As shown in  FIG. 10  and  FIG. 11 , the transmission cable  80  has a first end P 1 ′ and a second end P 2 ′ opposite to the first end P 1 ′. The first end P 1 ′ of the transmission cable  80  is coupled to the circuit board  46  of the electronic device  30 , and the second end P 2 ′ of the transmission cable  80  is coupled to the connecting contact  76 . In other words, the transmission ports  38  of the transmission port module  70  are coupled to the circuit board  46  of the electronic device  30  via the integrated circuit board  42 , the connecting contact  76  and the transmission cable  80  in sequence, such that the signals can be transmitted between the transmission ports  38  and the circuit board  46  of the electronic device  30 . Accordingly, the electronic device  30  can be coupled to the external electronic device, so as to enhance flexibility of the electronic device  30 . 
         [0057]    In summary, when the transmission ports  38  of the transmission port module  70  are in use, the transmission port module  70  is rotated by the rotably holding member  72  from the containing position shown in  FIG. 11  to the in-use position shown in  FIG. 10 . In such a manner, the transmission ports  38  of the transmission port module  70  can be exposed on the casing  32 , such that the electronic device  30  can be coupled to the other external electronic devices by the transmission ports  38 . When the transmission ports  38  of the transmission port module  70  are not in use, the transmission port module  70  is rotated by the rotably holding member  72  from the in-use position shown in  FIG. 10  to the containing position shown in  FIG. 11 . In such a manner, the transmission ports  38  can be hidden inside the containing slot  321 , as shown in  FIG. 11 , so as to keep appearance integrity of the casing  32  of the electronic device  30 . Accordingly, it can enhance aesthetic feeling of the electronic device  30  and further prevent objects, such as dusts, from being attached on the transmission ports  38  or entering the electronic device  30  from the transmission ports  38 , so as to prevent damage of internal components of the electronic device  30  and keep the electronic device  30  functioning normally. 
         [0058]    In this embodiment, the transmission cable  80  can further include a first connecting contact  801  and a second connecting contact  803 . The first connecting contact  801  is disposed on the first end P 1 ′ of the transmission cable  80 , and the second connecting contact  803  is disposed on the second end P 2 ′ of the transmission cable  80 . Furthermore, the first connecting contact  801  is coupled to the circuit board  46  of the electronic device  30  in an inserting manner, and the second connecting contact  803  is coupled to the connecting contact  76  in an inserting manner. In practical application, the transmission cable  80  is a flexible printed circuit, and the first connecting contact  801  and the second connecting contact  803  are respectively a gold finger contact. Structures of the first connecting contact  801  and the second connecting contact  803  are not limited to those mentioned above. For example, the first connecting contact  801  and the second connecting contact  803  can be respectively a board-to-board connector. In other words, connectors of the first connecting contact  801  and the second connecting contact  803  capable of coupling the circuit board  46  with the connecting contact  76  are within the scope of the present invention. 
         [0059]    Designs for coupling the transmission cable  80  with the circuit board  46  are not limited to those mentioned in this embodiment. For example, the first end P 1 ′ of the transmission cable  80  can be soldered to the circuit board  46 , and the second end P 2 ′ of the transmission cable  80  can be soldered to the connecting contact  76 , such that the transmission cable  80  can omit the first connecting contact  801  and the second connecting contact  803 . In other words, the first connecting contact  801  and the second connecting contact  803  can be omitted in this embodiment for saving the cost of manufacture. As for which one of the above-mentioned designs is adopted, it depends on practical demands. In addition, components in the first embodiment with denotes identical to those in the second embodiment have the same structures and principles, and further descriptions are omitted herein for simplicity. 
         [0060]    According to the first embodiment, the transmission port of the transmission port module of the present invention is disposed inside the housing, and the housing is detachably installed inside the containing slot on the casing of the electronic device. When the transmission port of the transmission port module is in use, the housing is installed inside the containing slot with the transmission port oriented towards outside of the casing of the electronic device, i.e. the first side oriented towards outside of the casing. Accordingly, the transmission port of the transmission port module is exposed on the casing for a user to use. When the transmission port of the transmission port module is not in use, the housing is installed inside the containing slot with the transmission port oriented towards inside of the casing of the electronic device, i.e. the second side oriented towards outside of the casing. Accordingly, the transmission port of the transmission port module is hidden inside the casing. 
         [0061]    According to the second embodiment, the transmission port of the transmission port module is held on the rotably holding member, and the rotably holding member is pivoted to the casing in the position corresponding to the opening of the containing slot. When the transmission port of the transmission port module is in use, the rotably holding member rotates to the in-use position. At the same time, the transmission port of the transmission port module is exposed on the casing for a user to use. When the transmission port of the transmission port module is not in use, the rotably holding member rotates to the containing position. At the same time, the transmission port of the transmission port module is hidden inside the casing. 
         [0062]    Compared to the prior art, the transmission port of the transmission port module of the present invention is capable of being contained inside the casing in a detachable or rotable manner as being not in sue, so as to keep appearance integrity of the casing of the electronic device. Accordingly, it can enhance aesthetic feeling of the electronic device and further prevent objects, such as dusts from being attached to the transmission port or entering the electronic device from the transmission port. As a result, it can prevent internal components of the electronic device from damage and keep the electronic device function normally. 
         [0063]    Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.