Abstract:
A gimbal includes a housing ( 1 ). A gyroscope board ( 4 ), a camera ( 21 ), and a camera main control board ( 22 ) electrically connected with the camera are disposed in the housing. A Wi-Fi circuit board ( 31 ) and a Wi-Fi antenna ( 33 ) are also disposed in the housing. The Wi-Fi circuit board is electrically connected with the camera main control board. The camera is fixed on the housing. The gimbal achieves the independent Wi-Fi transmission, so that the structure is simplified.

Description:
CROSS REFERENCE OF RELATED APPLICATION 
       [0001]    This is a U.S. National Stage under 35 U.S.C. 371 of the International Application PCT/CN2015/097351, filed Dec. 15, 2015, which claims priority under 35 U.S.C. 119(a-d) to CN201420795952.2, filed Dec. 15, 2014. The full text of the above-mentioned Chinese patent application is included in the present invention. 
     
    
     BACKGROUND OF THE PRESENT INVENTION 
       [0002]    Field of Invention 
         [0003]    The present invention relates to a gimbal. 
         [0004]    Description of Related Arts 
         [0005]    With the development of society and industry by leaps and bounds, the UAV (Unmanned Aerial Vehicle) aerial photography has been applied to more and more fields, such as film and television shooting, fire patrol shooting and traffic monitoring. The synchronous transmission of the UAV aerial photography has important significances. However,the gimbal itself now on the market does not include a Wi-Fi (wireless fidelity) digital transmission system, and it is necessary for the gimbal to transmit through an external device. Moreover, the internal structure of the gimbal is complex, electronic components need to be connected with each other through wires, which results in the complex connections among the overall wires, thus it is prone to failure. In addition, because the camera itself rotates, the wires will be driven to move together, thus it is easy to failure due to worn wires. 
       SUMMARY OF THE PRESENT INVENTION 
       [0006]    A technical problem to be resolved of the present invention is to provide a gimbal for overcoming drawbacks that the existing gimbals are unable to independently achieve the Wi-Fi digital transmission, and it is difficult to arrange electronic components due to complex internal wire connections. 
         [0007]    The present invention resolves the above technical problem through a technical solution as follows. 
         [0008]    A gimbal comprises a housing, wherein: a gyroscope board, a camera and a camera main control board electrically connected with the camera are disposed in the housing; a Wi-Fi (wireless fidelity) circuit board and Wi-Fi antennas are also disposed in the housing; the Wi-Fi circuit board is electrically connected with the camera main control board, the camera is fixed on the housing. While operating, the Wi-Fi circuit board is adapted for receiving video signals and transmitting the video signals to an exterior through the Wi-Fi antennas. The Wi-Fi circuit board always rotates with the housing for saving wires and avoiding wear and tear of the wires. 
         [0009]    Preferably, the camera is fixed in the housing through a camera frame; through the camera frame, the camera is able to be firmly fixed in the housing. 
         [0010]    Preferably, an amount of the Wi-Fi antennas is two;the two Wi-Fi antennas are respectively located at an upper side and a lower side of the housing for enhancing the signal strength and avoiding shielding of other frame structures while rotating the housing, thereby ensuring the stability of signals. 
         [0011]    Preferably, the gimbal further comprises a heat sink which is attached to the Wi-Fi circuit board for effectively dissipating heat of the Wi-Fi circuit board. 
         [0012]    Preferably, the housing comprises a front cover and a rear cover connected with the front cover through threaded components. 
         [0013]    Preferably, the gimbal further comprises a second shaft arm, wherein: a first motor seat and a first bearing seat are respectively disposed at two sides of the rear cover, a first shaft motor is fixed to the first motor seat, a first bearing is fixed to the first bearing seat, a hollow shaft penetrates through the first bearing, the second shaft arm is respectively connected with the hollow shaft and the first shaft motor, such that the housing is able to rotate relatively to the second shaft arm for adjusting camera angles. 
         [0014]    Preferably, the first motor seat and the first bearing seat are respectively covered with two end caps for sealing the housing, so as to avoid components in the housing being eroded. 
         [0015]    Preferably, the gimbal further comprises a second shaft motor which is respectively connected with the second shaft arm and a third shaft arm, such that the second shaft arm is able to rotate relatively to the third shaft arm, so as to further drive the housing to rotate. 
         [0016]    Preferably, the gimbal further comprises a third shaft seat, wherein the third shaft arm is fixed to the third shaft seat. 
         [0017]    Preferably, the gimbal further comprises a third shaft motor which is respectively connected with the third shaft seat and a gimbal shock absorption plate, such that the third shaft seat is able to rotate relatively to the gimbal shock absorption plate, so as to further drive the housing to rotate. 
         [0018]    Preferably, the gimbal further comprises gimbal fixed supports, wherein multiple shock absorption balls are disposed between the gimbal shock absorption plate and each of the gimbal fixed supports for reducing the vibration of the gimbal, so as to ensure the image quality of the camera. 
         [0019]    Preferably, a gimbal receiver, a photoelectric encoder and a gimbal main control board are disposed in the third shaft seat; the third shaft seat is covered with a stuffy cover for sealing the third shaft seat, so as to ensure the sealing effect. 
         [0020]    In the present invention, the above-described preferred conditions can be arbitrarily combined on the basis of common senses in the field to obtain the preferred embodiments of the present invention 
         [0021]    The positive effects of the present invention are that:in the present invention, the Wi-Fi circuit board is disposed in the housing, thus realizing the independent Wi-Fi transmission of the gimbal, simplifying the connections among the wires, reducing the failure due to the wear and tear of the wires, and decreasing the failure rate. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0022]      FIG. 1  is an exploded structural diagram of a gimbal according to a preferred embodiment of the present invention. 
           [0023]      FIG. 2  is an internally structurally schematic view of a housing according to the above preferred embodiment of the present invention. 
           [0024]      FIG. 3  is a top view of the gimbal according to the preferred embodiment of the present invention. 
           [0025]      FIG. 4  is a front view of the gimbal according to the preferred embodiment of the present invention. 
           [0026]      FIG. 5  is a side view of the gimbal according to the preferred embodiment of the present invention. 
       
    
    
       [0027]    Descriptions of drawing reference numbers are as follows.
     1 : housing;  11 : front cover;  12 : rear cover;  13 : end cap;  14 : end cap;  21 : camera;  22 : camera main control board;  23 : camera frame;  31 : Wi-Fi circuit board;  32 : heat sink;  33 : Wi-Fi antenna;  34 : Wi-Fi antenna;  4 : gyroscope board;  51 : first shaft motor;  52 : second shaft arm;  53 : first bearing;  54 : hollow shaft;  61 : second shaft motor;  621 : third shaft arm;  622 : decorating component;  631 : third shaft seat;  632 : stuffy cover;  71 : third shaft motor;  721 : gimbal fixed support;  722 : shock absorption ball;  723 : gimbal shock absorption plate;  81 : gimbal receiver;  82 : fastening component;  83 : gimbal main control board;  84 : photoelectric encoder;  91 : screw;  92 : screw;  93 : screw;  94 : screw;  95 : screw;  96 : screw;  97 : screw;  98 : screw;  99 : slip ring power wire.   
 
       DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0029]    The present invention is further more clearly and completely explained with accompanying preferred embodiments and drawings as follows. 
         [0030]    As shown in  FIGS. 1-5 , the present invention provides a gimbal. Specifically, referring to  FIGS. 3-5 , the gimbal comprises a housing  1  which is capable of rotating around three axes. 
         [0031]    Referring to  FIGS. 1 and 2 , the housing  1  comprises a front cover  11  and a rear cover  12  connected with the front cover  11  through multiple screws  95 . 
         [0032]    A gyroscope board  4 , a camera  21  and a camera main control board  22  electrically connected with the camera  21  are disposed in the housing  1 . The camera  21  is installed on the camera frame  23 . The camera frame  23  is connected with the rear cover  12  through multiple screws  96  for fastening. 
         [0033]    A Wi-Fi (wireless fidelity) circuit board  31 , Wi-Fi antennas  33 ,  34  and a heat sink  32  are also disposed in the housing  1 , wherein:the Wi-Fi circuit board  31  is electrically connected with the camera main control board  22 ;the heat sink  32  is attached to the Wi-Fi circuit board  31  for effectively dissipating heat of the Wi-Fi circuit board  31 ; both the heat sink  32  and the Wi-Fi circuit board  31  are fixed to the rear cover  12  through screws  93 . 
         [0034]    While operating, the Wi-Fi circuit board is adapted for receiving video signals and transmitting the video signals to an exterior through the Wi-Fi antennas  33 ,  34 . The Wi-Fi circuit board  31  always rotates with the housing  1 , which not only saves wires for connecting the housing  1  with the exterior, but also avoids wear and tear of the wires due to rotating the housing  1 . 
         [0035]    Preferably, as shown in  FIG. 2 ,the present invention comprises the Wi-Fi antennas  33 ,  34  which are respectively connected with the Wi-Fi circuit board  31  and located at a lower side and an upper side of the housing  1  for enhancing the signal strength and avoiding shielding of other frame structures while rotating the housing  1 , thereby ensuring the stability of signals. 
         [0036]    As shown in  FIG. 1 , a second shaft arm  52  is disposed at an outside of the housing  1 , a first motor seat and a first bearing seat are respectively disposed at two sides of the rear cover  12 , the second shaft arm  52  is fixed to one end of a first shaft motor  51  through screws  98 , the first motor seat is also fixed to the other end of the first shaft motor  51  through screws. The two ends of the first shaft motor  51  are able to produce relatively rotational movements. A first bearing  53  is fixed to the first bearing seat. A hollow shaft  54  penetrates through the first bearing  53 . 
         [0037]    The second shaft arm  52  is respectively connected with the hollow shaft  54  and the first shaft motor  51 , and the two ends of the first shaft motor  51  are able to produce relatively rotational movements, such that the housing  1  is able to rotate relatively to the second shaft arm  52  for adjusting camera angles. 
         [0038]    Preferably, the first motor seat and the first bearing seat are respectively covered with end caps  13 ,  14  for sealing the housing  1 , so as to avoid components in the housing being eroded. 
         [0039]    The gimbal provided by the present invention further comprises a second shaft motor  61  which is respectively fixed to the second shaft arm  52  through screws  92  and connected with a third shaft arm  621  through screws  91 , two ends of the second shaft motor  61  are able to produce relatively rotational movements, such that the second shaft arm  52  is able to rotate relatively to the third shaft arm  621 , for further driving the housing  1  to rotate. 
         [0040]    The gimbal further comprises a third shaft seat  631 , and the third shaft arm  621  is fixed to the third shaft seat  631 . A gimbal receiver  81 , a photoelectric encoder  84  and a gimbal main control board  83  are disposed in the third shaft seat  631 . The gimbal main control board  83  is fixed to the third shaft seat  631  through a fastening component  82 . The third shaft seat  631  is covered with a stuffy cover  632  for sealing the third shaft seat  631 , so as to ensure the sealing effect. 
         [0041]    The gimbal further comprises a third shaft motor  71 , one end of which is connected with the third shaft seat  631  and the other end thereof is connected with a gimbal shock absorption plate  723  through screws  97 , such that the third shaft seat  631  is able to rotate relatively to the gimbal shock absorption plate  723 , so as to further drive the housing  1  to rotate. 
         [0042]    The gimbal further comprises four gimbal fixed supports  721 , wherein multiples hock absorption balls  722  are disposed between the gimbal shock absorption plate  723  and each of the gimbal fixed supports  721  for reducing the vibration of the gimbal, so as to ensure the image quality of the camera. 
         [0043]    Furthermore, a slip ring power wire  99  is disposed on the gimbal shock absorption plate  723  for supplying power. A decorating component  622  is connected with an outside of the third shaft arm  621  through screws  94  for ensuring aesthetics. 
         [0044]    While the specific embodiments of the present invention have been described above, it should be understood by one skilled in the art that these embodiments are merely illustrative and that various changes or modifications may be made to these embodiments without departing from the principles and spirit of the present invention. 
         [0045]    Accordingly, the protective scope of the present invention is limited by the appended claims.