Patent Publication Number: US-2011058693-A1

Title: Wireless microphone device

Description:
FIELD OF THE INVENTION 
     The present invention relates to a wireless microphone device, and more particular to a wireless microphone device having an obliquely disposed antenna element. 
     BACKGROUND OF THE INVENTION 
     Conventional belt pack wireless microphones can be utilized to communicate with others without the necessity of holding the microphone by hands, and thus provides the availability of the hands to perform other tasks. Referring to  FIG. 1  for a schematic view of conventional wireless microphone device, the antenna element  110  is usually disposed on the top surface of the casing  120  of the wireless microphone device  100  for receiving or transmitting the radio signal. One end of the antenna element  110  is fixed on the top surface of the casing  120 , and the other end is extending upwardly and vertically with a predetermined length. 
     Referring to  FIG. 2  for a diagram of a user wearing the conventional wireless microphone device around the waist, the antenna element  110  might be forced to bend because of the figure of the user. The signal receiving pattern of the antenna element  110  may be changed after the antenna element  110  is bended, thereby decreasing the performance of the antenna element  110 . If the bending angle of the antenna element  110  is larger than the designed tolerance or the antenna element  110  is bended repeatedly, the antenna element  110  will be fractured at the mounting point, such that the length of the antenna element  110  becomes different from the original design and the radio wave may not be transmitted or received normally. For other circumstances, the antenna element  110  may be bended toward the user and the top of the antenna element  110  is pressed against the abdomen of the user, resulting in uncomfortable feelings of the user. Moreover, because the antenna element  110  is in close proximity to the user&#39;s body, the radio wave may be sheltered or absorbed by the human body, reducing the efficiency of the antenna element  110 . 
     SUMMARY OF THE INVENTION 
     In view of the drawbacks of the prior art, a primary object of the present invention is to provide a wireless microphone device for solving the condition that the conventional antenna element is easily bended and fractured by the user&#39;s body. 
     Consequently, the present invention provides a wireless microphone device comprising a casing, an antenna element and a transceiver. A concave recession is formed on a side surface of the casing. One end of the antenna element is disposed on a bottom surface of the concave recession, and the other end of the antenna element is extending upwardly with an oblique angle relative to the side surface. The transceiver is disposed inside the casing for transmitting or receiving a microphone signal via the antenna element. 
     As described above, the wireless microphone device of the present invention may comprise one or more following advantages: 
     (1). An oblique angle is formed between the antenna element and the side surface of the wireless microphone device, thereby preventing the antenna element from pressing against the user&#39;s body and causing uncomfortable feelings of the user while wearing the wireless microphone device. 
     (2). Because the antenna element is obliquely disposed on the wireless microphone device, the user&#39;s body pressing on the antenna element can be avoided and thus reducing deformation of the antenna element. On the other hand, the obliquely disposed antenna element keeps a distance from the user&#39;s body, and thereby the possibility of the radio wave being sheltered or absorbed by the human body is reduced. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein 
         FIG. 1  is a schematic view of the conventional wireless microphone device; 
         FIG. 2  is a diagram of a user setting the conventional wireless microphone device around the waist; 
         FIG. 3  is a schematic view of the wireless microphone of the present invention; 
         FIG. 4  is a lateral view of the wireless microphone of the present invention; and 
         FIG. 5  is a diagram of a user setting the wireless microphone device of the present invention around the waist. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to  FIG. 3  and  FIG. 4  for a schematic view and a lateral view of the wireless microphone respectively, the wireless microphone device  1  comprises a casing  10  and an antenna element  20 . A concave recession  12  is disposed on a side surface  11  of the casing  10 . One end of the antenna element  10  is disposed on the bottom surface  13  of the concave recession  12  and the antenna element  10  is extending upwardly with an oblique angle θ relative to the side surface  11 . A transceiver  14  is disposed inside the casing, and the transceiver  14  transmits or receives a microphone signal by the antenna element  10 . 
     In addition, the antenna element  20  has a fastening portion  21  and an extending portion  22 . The antenna element  20  may be mounted to the casing  10  by latching, screwing or inserting the fastening portion  21  to the bottom surface  13 . Other measures may also be taken to fix the fastening portion  21  to the bottom surface  13 . Furthermore, one end of the extending portion  22  is connected to the fastening portion  21 , and the other end of the extending portion  22  is extending away from the bottom surface  13  as a top end. A cover  23  may further be mounted to cover the top end of the extending portion  22  for protection. 
     The material of the extending portion  22  may be made of a flexible material or a hard material. The oblique angle θ may be modified according to the actual practice for allowing the user to carry the wireless microphone device  1 . 
     Referring to  FIG. 5 , when the user wears the wireless microphone device  1  of the present invention around the waist, with the obliquely disposed antenna element  20 , the user&#39;s body would not press or bend the antenna element  20 . Therefore the user would not have any uncomfortable experience, and the performance of the antenna element  20  would not be compromised due to shielding or absorbing of the radio signal. 
     As described above, the wireless microphone device of the present invention has an obliquely disposed antenna element, so as to avoid the uncomfortable experience of the user because the wireless microphone device would not pressed upon the user&#39;s body. Also, the possibility of the decreased efficiency of the antenna element due to sheltered or absorbed radio wave by the human body would be decreased, such that the quality of the communication may be improved. 
     In addition, the obliquely disposed antenna element on the wireless microphone device of the present invention will prevent the antenna element from being bended by the external force and fractured at the fixed point. 
     The above description is illustrative only and is not to be considered limited. Various modifications or changes can be made without departing from the spirit and scope of the invention. All such equivalent modifications and changes shall be included within the scope of the appended claims.