Patent Publication Number: US-2023133414-A1

Title: Wireless keyboard and mouse combo

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The application claims the benefit of Taiwan Patent Application No. 110140640, filed on Nov. 1, 2021, at the Taiwan Intellectual Property Office, the disclosures of which are incorporated herein in their entirety by reference. 
     FIELD OF THE INVENTION 
     The present invention relates to a wireless keyboard and mouse combo having a wireless keyboard and a wireless mouse, in particular to the wireless keyboard and the wireless mouse which can linkedly switch from a host commonly connected now to a host commonly connected next. 
     BACKGROUND OF THE INVENTION 
     The wireless keyboards and the wireless mouses currently on the market are not linked when they switch between hosts, and they need to be switched individually. That is to say, after a key of the wireless keyboard is pushed to switch to a different host, a button of the wireless mouse is also required to be pushed to switch to that host. When a function of synchronized switching hosts is required, a software for synchronized switching hosts is required to be downloaded from a computer so that the wireless keyboard and the wireless mouse can have the function of switching hosts linkedly, and this is not convenient for a user. How to improve this situation so that the wireless keyboard and the wireless mouse can conveniently switch hosts linkedly is worthy of further research and improvement. 
     Keeping the drawbacks of the prior art in mind, and through the use of robust and persistent experiments and research, the applicant has finally conceived of a wireless keyboard and mouse combo. 
     SUMMARY OF THE INVENTION 
     It is therefore an objective of the present invention to provide a wireless keyboard and mouse combo using hardware synchronization to switch among different hosts via a wireless keyboard. When the wireless keyboard is switched from a first host currently connected to a second host via pushing a key, the wireless mouse is linkedly switched from the first host to the second host also. The proposed combo can switch among different hosts via the wireless mouse too. When the wireless mouse is switched from a first host currently connected to a second host via pushing a button, the wireless keyboard is linkedly switched from the first host to the second host also. This wireless keyboard and mouse combo has a relatively simple configuration and relatively low manufacturing and operational costs, and it has advantages in the field of wireless keyboard and mouse combo. 
     In accordance with the first aspect of the present invention, a wireless keyboard and mouse combo comprises a wireless keyboard including a first switching switch, a keyboard transceiver chip, a key matrix, and a keyboard Bluetooth chip electrically connected to the keyboard transceiver chip, the first switching switch and the key matrix, and a wireless mouse including a second switching switch, two mouse buttons, a mouse transceiver chip, and a mouse Bluetooth chip electrically connected to the mouse transceiver chip, the second switching switch and the two mouse buttons, wherein when the first switching switch or the second switching switch is triggered, the wireless keyboard and the wireless mouse are linked and switched from a first host currently connected with the two to a second host. 
     In accordance with the second aspect of the present invention, a wireless keyboard and mouse combo comprises a wireless keyboard including a first switching switch, and a keyboard Bluetooth/transceiver chip electrically connected to the first switching switch, and a wireless mouse including a second switching switch, and a mouse blue tooth/transceiver chip electrically connected to the second switching switch, wherein when the first switching switch or the second switching switch is triggered, the wireless keyboard and the wireless mouse are both linked and switched from a first host to a second host. 
     In accordance with the third aspect of the present invention, a wireless keyboard and mouse combo for one of a plurality of controlled devices comprises a wireless keyboard including a first switching switch, and a keyboard Bluetooth/transceiver chip electrically connected to the first switching switch, and a wireless mouse including a second switching switch, and a mouse Bluetooth/transceiver chip electrically connected to the second switching switch and having a direct communication connection with the keyboard Bluetooth/transceiver chip. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Other objectives, advantages and efficacies of the present invention will be described in detail below taken from the preferred embodiments with reference to the accompanying drawings, in which: 
         FIG.  1    is a circuit schematic diagram of a wireless keyboard and mouse combo according to the first preferred embodiment of the present invention. 
         FIG.  2    is a circuit schematic diagram of a wireless keyboard and mouse combo according to the second preferred embodiment of the present invention. 
         FIG.  3    is a circuit schematic diagram of a wireless keyboard and mouse combo according to the third preferred embodiment of the present invention. 
         FIG.  4    is a circuit schematic diagram of a wireless keyboard and mouse combo according to the fourth preferred embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The present invention will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for purposes of illustration and description only; it is not intended to be exhaustive or to be limited to the precise form disclosed. 
     The present invention uses hardware synchronization to cause a wireless keyboard and a wireless mouse of a wireless keyboard and mouse combo to switch hosts linkedly. The wireless keyboard (e.g., a wireless Bluetooth keyboard) can actively switch from the current host to a different host, and cause the wireless mouse (e.g., a wireless Bluetooth mouse) to linkedly switch to the different host also. The wireless mouse can also switch from the current host to a different host, and cause the wireless keyboard to linkedly switch to the different host too. 
       FIG.  1    shows a circuit schematic diagram of a wireless keyboard and mouse combo according to the first preferred embodiment of the present invention. In  FIG.  1   , the wireless keyboard and mouse combo  1  has a wireless keyboard  11  and a wireless mouse  12 . The wireless keyboard  11  has a first switching switch  111 , a keyboard transceiver chip  112 , a key matrix  113  and a keyboard Bluetooth chip  114  electrically connected to the keyboard transceiver chip  112 , the first switching switch  111  and the key matrix  113 . In addition, the wireless keyboard  11  further includes a first antenna  115  and a second antenna  116 . The wireless mouse  12  has a second switching switch  121 , two mouse buttons  122 , a mouse transceiver chip  123 , a sensor  125  and a mouse Bluetooth chip  124  electrically connected to the mouse transceiver chip  123 , the second switching switch  121 , the sensor  125  and the two mouse buttons  122 . In addition, the wireless mouse  12  further includes a third antenna  126  and a fourth antenna  127 , wherein the sensor  125  is an optical mouse motion sensor  125  used to sense a movement of the wireless mouse  12 . When the first switching switch  111  or the second switching switch  121  is touched, the wireless keyboard  11  and the wireless mouse  12  are linked and switched from a first host currently connected with the two to a second host. As shown in  FIG.  1   , there are a first external host  3  (in this embodiment, it is shown as a laptop), a second external host  4  (in this embodiment, it is shown as a desktop computer) and a third external host  5  (in this embodiment, it is shown as a notebook). The first host and the second host are any two being selected from a group consisting of the first external host  3 , the second external host  4  and the third external host  5 . For example, the first host can be the first external host  3 , and the second host can be the second external host  4 . Moreover, the first host and the second host can also be a combination of any two of the first to the third external hosts. 
       FIG.  2    shows a circuit schematic diagram of a wireless keyboard and mouse combo according to the second preferred embodiment of the present invention. In  FIG.  2   , the wireless keyboard and mouse combo  2  has a wireless keyboard  21  and a wireless mouse  22 . The wireless keyboard  21  has a first switching switch  111 , a key matrix  113 , and a keyboard Bluetooth/transceiver chip  211  electrically connected to the first switching switch  111  and the key matrix  113 . The wireless mouse  22  includes a second switching switch  121 , two mouse buttons  122 , a sensor  125  and a mouse Bluetooth/transceiver chip  221  electrically connected to the second switching switch  121 , the two mouse buttons  122  and the sensor  125 . 
       FIG.  3    shows a circuit schematic diagram of a wireless keyboard and mouse combo according to the third preferred embodiment of the present invention. In  FIG.  3   , the wireless keyboard and mouse combo  6  has a wireless keyboard  11 , a wireless mouse  12  and a wireless audio device  61 . The wireless keyboard  11  and the wireless mouse  12  are the same as those shown in  FIG.  1   . The wireless audio device  61  includes a third switching switch  611 , a loudspeaker (it can be a speaker or a headphone driver)  612 , a microphone  615 , an audio device transceiver chip  613 , a fifth antenna  616  and a sixth antenna  617  and an audio device Bluetooth chip  614  electrically connected to the third switching switch  611 , the loudspeaker  612 , the microphone  615 , the fifth antenna  616  and the audio device transceiver chip  613 . The sixth antenna  617  is electrically connected to the audio device transceiver chip  613 . 
       FIG.  4    shows a circuit schematic diagram of a wireless keyboard and mouse combo according to the fourth preferred embodiment of the present invention. In  FIG.  4   , the wireless keyboard and mouse combo  7  has a wireless keyboard  21 , a wireless mouse  22  and a wireless audio device  71 . The wireless keyboard  21  and the wireless mouse  22  are the same as those shown in  FIG.  2   . The wireless audio device  71  includes a third switching switch  611 , a loudspeaker (it can be a speaker or a headphone driver)  612 , a microphone  615 , a third antenna  712  and an audio device Bluetooth/transceiver chip  711  electrically connected to the third switching switch  611 , the loudspeaker  612 , the microphone  615  and the third antenna  712 . 
     In addition, as shown in  FIG.  2   , the wireless keyboard  21  further includes a first antenna  212  electrically connected to the keyboard Bluetooth/transceiver chip  211 , and the wireless mouse  22  further includes a second antenna  222  electrically connected to the mouse Bluetooth/transceiver chip  221 . When the first switching switch  111  or the second switching switch  121  is triggered, the wireless keyboard  21  and the wireless mouse  22  are linked and switched from a first host currently connected with the two to a second host. As shown in  FIG.  2   , there are also a first external host  3  (in this embodiment, it is shown as a laptop too), a second external host  4  (in this embodiment, it is shown as a desktop computer too) and a third external host  5  (in this embodiment, it is shown as a notebook too). The first host and the second host are any two being selected from a group consisting of the first external host  3 , the second external host  4  and the third external host  5 . For example, the first host can be the first external host  3 , and the second host can be the second external host  4 . Moreover, the first host and the second host can also be a combination of any two of the first to the third external hosts. 
     In the wireless keyboard and mouse combo  1  as shown in  FIG.  1   , when the first switching switch  111  is triggered, an address of a second host ID of the second host (e.g., the second external host  4 ) is sent from the keyboard transceiver chip  112  to the wireless mouse  12  for a potential linking switch from the first host (e.g., the first external host  3 ) to the second host (e.g., the second external host  4 ). The keyboard Bluetooth chip  114  sends the address of the second host ID to the keyboard transceiver chip  112 , and the address of the second host ID is sent to the wireless mouse  12  from the keyboard transceiver chip  112 . After the wireless mouse  12  received the address of the second host ID, the address of the second host ID is checked first to see whether this is a successfully paired host ID; and if yes, then the wireless mouse  12  uses the address of the second host ID to do a first Bluetooth backlink, and if not, then the wireless mouse  12  keeps a first original connection status. 
     In  FIG.  1   , when the second switching switch  121  is triggered, the address of the second host ID is sent from the mouse transceiver chip  123  to the wireless keyboard  11  for a potential linking switch from the first host (e.g., the first external host  3 ) to the second host (e.g., the second external host  4 ). The mouse Bluetooth chip  124  sends the address of the second host ID to the mouse transceiver chip  123  and the address of the second host ID is sent to the wireless keyboard  11  from the mouse transceiver chip  123 . After the wireless keyboard  11  received the address of the second host ID, the address of the second host ID is checked first to see whether this is a successfully paired host ID; and if yes, then the wireless keyboard  11  uses the address of the second host ID to do a second Bluetooth backlink, and if not, then the wireless keyboard  11  keeps a second original connection status. 
     In the wireless keyboard and mouse combo  1  as shown in  FIG.  1   , the keyboard Bluetooth chip  114  controls the key matrix  113 , and controls a communication between the keyboard transceiver chip  112  and the wireless mouse  12 . The keyboard transceiver chip  112  transmits a first switching command including the address of the second host ID for switching from the first host (e.g., the first external host  3 ) to the second host (e.g., the second external host  4 ) to the wireless mouse  12 . The mouse Bluetooth chip  124  controls the two mouse buttons  122 , and controls a communication between the mouse transceiver chip  123  and the wireless keyboard  11 . The mouse transceiver chip  123  is used to transmit a second switching command including the address of the second host ID for switching from the first host (e.g., the first external host  3 ) to the second host (e.g., the second external host  4 ) to the wireless keyboard  11 . The keyboard transceiver chip  112  is also used to receive the second switching command, and the mouse transceiver chip  123  is used to receive the first switching command too. The first host (e.g., the first external host  3 ) and the second host (e.g., the second external host  4 ) are any two being selected from a group consisting of the first external host  3 , the second external host  4  and the third external host  5 . The wireless keyboard  11  includes a plurality of keys, and the key matrix  113  includes an 8×18 matrix used to indicate a key of the plurality of keys currently being pressed. 
     In  FIG.  1   , the first antenna  115  included in the wireless keyboard  11  is electrically connected to the keyboard Bluetooth chip  114 , the second antenna  116  is electrically connected to the keyboard transceiver chip  112 , the third antenna  126  is electrically connected to the mouse Bluetooth chip  124 , and the fourth antenna  127  is electrically connected to the mouse transceiver chip  123 . Any one of the first external host  3 , the second external host  4  and the third external host  5  is one selected from a group consisting of a laptop ( 3 , as shown in  FIG.  1   ), a desktop computer ( 4 , as shown in  FIG.  1   ) and a notebook ( 5 , as shown in  FIG.  1   ), and the keyboard transceiver chip  112  and the mouse transceiver chip  123  are respectively a radio frequency transceiver chip. 
     As shown in  FIG.  2   , the first antenna  212  and a key matrix  113  included in the wireless keyboard  21  are electrically connected to the keyboard Bluetooth/transceiver chip  211 , and the second antenna  222  and the two mouse buttons  122  included in the wireless mouse  22  are electrically connected to the mouse Bluetooth/transceiver chip  221 . The wireless keyboard  21  includes a plurality of keys, and the key matrix  113  includes an 8×18 matrix and is used to indicate a key of the plurality of keys currently being pressed. The keyboard Bluetooth/transceiver chip  211  includes a keyboard Bluetooth chip (e.g., see the keyboard Bluetooth chip  114  as shown in  FIG.  1   ) and a keyboard transceiver chip (e.g., see the keyboard transceiver chip  112  as shown in  FIG.  1   ) electrically connected to the keyboard Bluetooth chip, the mouse Bluetooth/transceiver chip  221  includes a mouse Bluetooth chip (e.g., see the mouse Bluetooth chip  124  as shown in  FIG.  1   ) and a mouse transceiver chip (e.g., see the mouse transceiver chip  123  as shown in  FIG.  1   ) electrically connected to the mouse Bluetooth chip. 
     In  FIG.  2   , when the first switching switch is triggered, the keyboard Bluetooth chip (e.g., see the keyboard Bluetooth chip  114  as shown in  FIG.  1   ) sends an address of a second host ID (e.g., see the second external host  4 ) of the second host to the keyboard transceiver chip (e.g., see the keyboard transceiver chip  112  as shown in  FIG.  1   ); the address of the second host ID is sent to the wireless mouse  22  from the keyboard transceiver chip (e.g., see the keyboard transceiver chip  112  as shown in  FIG.  1   ); after the wireless mouse  22  received the address of the second host ID, the address of the second host ID is checked first to see whether this is a successfully paired host ID; and if yes, then the wireless mouse  22  uses the address of the second host ID to do a Bluetooth backlink, and if not, then the wireless mouse  22  keeps a first original connection status. When the second switching switch  121  is triggered, the mouse Bluetooth chip (e.g., see the mouse Bluetooth chip  124  as shown in  FIG.  1   ) sends the address of the second host ID of the second host (e.g., see the second external host  4 ) to the mouse transceiver chip (e.g., see the mouse transceiver chip  123  as shown in  FIG.  1   ); the address of the second host ID is sent to the wireless keyboard  21  from the mouse transceiver chip (e.g., see the mouse transceiver chip  123  as shown in  FIG.  1   ); after the wireless keyboard  21  received the address of the second host ID, the address of the second host ID is checked first to see whether this is a successfully paired host ID; and if yes, then the wireless keyboard  21  uses the address of the second host ID to do the Bluetooth backlink, and if not, then the wireless keyboard  21  keeps a second original connection status. 
     As shown in  FIG.  3   , the wireless keyboard and mouse combo  6  further comprising a wireless audio device  61 , wherein the wireless audio device  61  includes a third switching switch  611 , a loudspeaker  612 , a microphone  615 , an audio device transceiver chip  613  and an audio device Bluetooth chip  614 , the audio device Bluetooth chip  614  is electrically connected to the audio device transceiver chip  613 , the third switching switch  611 , the loudspeaker  612  and the microphone  615 , the wireless mouse  12  further includes a sensor  125  for sensing a movement of the wireless mouse  12 , the keyboard Bluetooth chip  114  controls the key matrix  113 , and controls a communication between the keyboard transceiver chip  112  and the wireless mouse  12 , or a communication between the keyboard transceiver chip  112  and the wireless audio device  61 , and the keyboard transceiver chip  112  transmits a first switching command including the address of the second host ID for switching from the first host to the second host to the wireless mouse  12  and the wireless audio device  61 . The mouse Bluetooth chip  124  controls the two mouse buttons  122 , and controls a communication between the mouse transceiver chip  123  and the wireless keyboard  11 , or a communication between the mouse transceiver chip  123  and the wireless audio device  61 , and the mouse transceiver chip  123  is used to transmit a second switching command including the address of the second host ID for switching from the first host to the second host to the wireless keyboard  11  and the wireless audio device  61 . The audio device Bluetooth chip  614  controls a function of Bluetooth sound effect inside the wireless audio device  61 , and controls a communication between the audio device transceiver chip  613  and the wireless mouse  12 , or a communication between the audio device transceiver chip  613  and the wireless keyboard  11 , and the audio device transceiver chip  613  transmits a third switching command including the address of the second host ID for switching from the first host to the second host to the wireless keyboard  11  and the wireless mouse  12 . The keyboard transceiver chip  112  receives the second and the third switching commands, the mouse transceiver chip  123  receives the first and the third switching commands, and the audio device transceiver chip  613  receives the first and the second switching commands. When the first switching switch  111 , the second switching switch  112 , or the third switching switch  611  is triggered, the wireless keyboard  11 , the wireless mouse  12  and the wireless audio device  61  are all linked and switched from a first host then-connected with the three switching switches to a second host. The first host and the second host are any two being selected from a group consisting of a first external host  3 , a second external host  4  and a third external host  5 , the wireless keyboard  11  includes a plurality of keys, and the key matrix  113  includes an 8×18 matrix used to indicate a key of the plurality of keys currently being pressed. 
     As shown in  FIG.  3   , the sensor  125  included in the wireless keyboard and mouse combo  6  is an optical mouse motion sensor, the loudspeaker  612  is a speaker or a headphone driver, after the wireless audio device  61  received the address of the second host ID, the address of the second host ID is checked first to see whether this is a successfully paired host ID; and if yes, then the wireless audio device  61  uses the address of the second host ID to do a third Bluetooth backlink, and if not, then the wireless audio device  61  keeps a third original connection status. The wireless keyboard  11  further includes a first antenna  115  and a second antenna  116 , the wireless mouse  12  further includes a third antenna  126  and a fourth antenna  127 , the wireless audio device  61  further includes a fifth antenna  616  and a sixth antenna  617 , the first antenna  115  is electrically connected to the keyboard Bluetooth chip  114 , the second antenna  116  is electrically connected to the keyboard transceiver chip  112 , the third antenna  126  is electrically connected to the mouse Bluetooth chip  124 , the fourth antenna  127  is electrically connected to the mouse transceiver chip  123 , the fifth antenna  616  is electrically connected to the audio device Bluetooth chip  614 , and the sixth antenna  617  is electrically connected to the audio transceiver chip  613 . The first external host  3 , the second external host  4  and the third external host  5  is one selected from a group consisting of a laptop, a desktop computer and a notebook, and each of the audio device transceiver chip  613 , the keyboard transceiver chip  112  and the mouse transceiver chip  123  is a radio frequency transceiver chip. 
     As shown in  FIG.  4   , the wireless keyboard and mouse combo  7  further comprises a wireless audio device  71 , wherein the wireless keyboard  21  further includes a first antenna  212  and a key matrix  113 , the wireless mouse  22  further includes a second antenna  222 , a sensor  125  and two mouse buttons  122  (see  FIG.  2   ), the wireless audio device  71  includes a third switching switch  611 , a loudspeaker  612 , a microphone  615 , an audio device Bluetooth/transceiver chip  711  and a third antenna  712 . The first antenna  212  and the key matrix  113  are electrically connected to the keyboard Bluetooth/transceiver chip  211 , the second antenna  222 , the sensor  125  and the two mouse buttons  122  are electrically connected to the mouse Bluetooth/transceiver chip  221 , and the third switching switch  611 , the loudspeaker  612 , the microphone  615  and the third antenna  712  are electrically connected to the audio device Bluetooth/transceiver chip  711 . The wireless keyboard  21  includes a plurality of keys, the key matrix  113  includes an 8×18 matrix and is used to indicate a key of the plurality of keys currently being pressed, the sensor  125  is used to sense a movement of the wireless mouse  22 , the keyboard Bluetooth/transceiver chip  211  includes a keyboard Bluetooth chip (e.g., see the keyboard Bluetooth chip  114  as shown in  FIG.  1   ) and a keyboard transceiver chip (e.g., see the keyboard transceiver chip  112  as shown in  FIG.  1   ) electrically connected to the keyboard Bluetooth chip, the mouse Bluetooth/transceiver chip  221  includes a mouse Bluetooth chip (e.g., see the mouse Bluetooth chip  124  as shown in  FIG.  1   ) and a mouse transceiver chip (e.g., see the mouse transceiver chip  123  as shown in  FIG.  1   ) electrically connected to the mouse Bluetooth chip, and the audio device Bluetooth/transceiver chip  711  includes an audio device Bluetooth chip (e.g., see the audio device transceiver chip  613  as shown in  FIG.  3   ) and an audio device transceiver chip (e.g., see the audio device Bluetooth chip  614  as shown in  FIG.  3   ) electrically connected to the audio device Bluetooth chip. 
     In  FIG.  4   , the sensor  125  included in the wireless keyboard and mouse combo  7  is an optical mouse motion sensor, the loudspeaker  612  is a speaker or a headphone driver, when the first switching switch  111  is triggered, the keyboard Bluetooth chip sends an address of a second host ID of the second host to the keyboard transceiver chip; the address of the second host ID is sent to the wireless mouse  22  and the wireless audio device  71  from the keyboard transceiver chip; after the wireless mouse  22  or the wireless audio device  71  received the address of the second host ID, the address of the second host ID is checked first to see whether this is a successfully paired host ID; and if yes, then the wireless mouse  22  or the wireless audio device  71  uses the address of the second host ID to do a Bluetooth backlink, and if not, then the wireless mouse  22  keeps a first original connection status and/or the wireless audio device  71  keeps a third original connection status. When the second switching switch  121  is triggered, the mouse Bluetooth chip sends the address of the second host ID of the second host to the mouse transceiver chip; the address of the second host ID is sent to the wireless keyboard  21  and the wireless audio device  71  from the mouse transceiver chip; after the wireless keyboard  21  or the wireless audio device  71  received the address of the second host ID, the address of the second host ID is checked first to see whether this is a successfully paired host ID; and if yes, then the wireless keyboard  21  or the wireless audio device  71  uses the address of the second host ID to do the Bluetooth backlink, and if not, then the wireless keyboard  21  keeps a second original connection status and/or the wireless audio device  71  keeps the third original connection status. When the third switching switch  611  is triggered, the audio device Bluetooth chip sends the address of the second host ID of the second host to the audio device transceiver chip; the address of the second host ID is sent to the wireless keyboard  21  and the wireless mouse  22  from the audio device transceiver chip; after the wireless keyboard  21  or the wireless mouse  22  received the address of the second host ID, the address of the second host ID is checked first to see whether this is a successfully paired host ID; and if yes, then the wireless keyboard  21  or the wireless mouse  22  uses the address of the second host ID to do the Bluetooth backlink, and if not, then the wireless mouse  22  keeps the first original connection status and/or the wireless keyboard  21  keeps the second original connection status. 
     A wireless keyboard and mouse combo  2  (see  FIG.  2   ) provided according to another preferred embodiment of the present invention is synchronously used for one of a plurality of controlled devices (as shown in  FIGS.  1  and  2   , any one of the first external host  3 , the second external host  4  and the third external host  5  is one of the controlled devices), it comprises a wireless keyboard  21  including a first switching switch  111 , and a keyboard Bluetooth/transceiver chip  211  electrically connected to the first switching switch  111 , and a wireless mouse  22  including a second switching switch  121 , and a mouse Bluetooth/transceiver chip  221  electrically connected to the second switching switch  121  and having a direct communication connection with the keyboard Bluetooth/transceiver chip  211 . 
     In the above-mentioned wireless keyboard and mouse combo  2  provided according to another preferred embodiment of the present invention, the wireless keyboard  21  further includes a first antenna  212  and a key matrix  113 , the wireless mouse  22  further includes a second antenna  222 , a sensor  125  and two mouse buttons  122  (see  FIG.  2   ). The first antenna  212  and the key matrix  113  are electrically connected to the keyboard Bluetooth/transceiver chip  211 , and the second antenna  222 , the sensor  125  and the two mouse buttons  122  are electrically connected to the mouse Bluetooth/transceiver chip  221 . The wireless keyboard  21  includes a plurality of keys, the key matrix  113  includes an 8×18 matrix and is used to indicate a key of the plurality of keys currently being pressed. The keyboard Bluetooth/transceiver chip  211  includes a keyboard Bluetooth chip (e.g., see the keyboard Bluetooth chip  114  as shown in  FIG.  1   ) and a keyboard transceiver chip (e.g., see the keyboard transceiver chip  112  as shown in  FIG.  1   ) electrically connected to the keyboard Bluetooth chip, and the mouse Bluetooth/transceiver chip  221  includes a mouse Bluetooth chip (e.g., see the mouse Bluetooth chip  124  as shown in  FIG.  1   ) and a mouse transceiver chip (e.g., see the mouse transceiver chip  123  as shown in  FIG.  1   ) electrically connected to the mouse Bluetooth chip. 
     As shown in  FIG.  2   , in the wireless keyboard and mouse combo  2  provided according to another preferred embodiment of the present invention, when the first switching switch  111  or the second switching switch  121  is triggered, one of the keyboard Bluetooth/transceiver chip  211  and the mouse Bluetooth/transceiver chip  221  sends a message to the other one such that the two can be used for synchronously optionally controlling the one of the plurality of controlled devices, wherein the one controlled device is a host (as shown in  FIGS.  1  and  2   , any one of the first external host  3 , the second external host  4  and the third external host  5 ). 
     A wireless keyboard and mouse combo  7  (see  FIG.  4   ) provided according to another preferred embodiment of the present invention further comprises a wireless audio device  71 , wherein the wireless audio device  71  includes a third switching switch  611  and an audio device Bluetooth/transceiver chip  711  electrically connected to the third switching switch  611  and having direct communication connections with the keyboard Bluetooth/transceiver chip  211  and the mouse Bluetooth/transceiver chip  221 , and when the first switching switch  111 , the second switching switch  121 , or the third switching switch  611  is triggered, one of the audio device Bluetooth/transceiver chip  711 , the keyboard Bluetooth/transceiver chip  211  and the mouse Bluetooth/transceiver chip  221  sends a message to the other two such that the three can be used for synchronously optionally controlling the one of the plurality of controlled devices, wherein the one controlled device is a host. 
     According to the above-mentioned descriptions, the present invention discloses a wireless keyboard and mouse combo using hardware synchronization to switch among different hosts via a wireless keyboard. When the wireless keyboard is switched from a first host currently connected to a second host via pushing a key, the wireless mouse is linkedly switched from the first host to the second host also. The proposed combo can switch among different hosts via the wireless mouse too. When the wireless mouse is switched from a first host currently connected to a second host via pushing a button, the wireless keyboard is linkedly switched from the first host to the second host also. This wireless keyboard and mouse combo has relatively simple configuration and relatively low manufacturing and operational costs, and it has advantages in the field of wireless keyboard and mouse combo, which demonstrates the non-obviousness and novelty. 
     While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention need not be limited to the disclosed embodiments. Therefore, it is intended to cover various modifications and similar configurations included within the spirit and scope of the appended claims, which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.