Patent Publication Number: US-8981879-B2

Title: Filter device

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an electronic product provided with a wave filter, and in particular to a filter device. 
     2. Description of Prior Art 
     The conventional dual-band module integrated device has a plurality of first antennas and second antennas; and an electronic equipment equipped with the dual-band module integrated device can receive required wireless signals by the first antennas and the second antennas. The problems of the conventional dual-band module integrated device can be explained with the assumption that the first antennas are designed to operate in 2.4 GHz˜2.5 GHz frequency band and the second antennas are designed to operate in 5.0 GHz˜6.0 GHz frequency band. If the first antennas and the second antennas are of the same style, the signals within the 2.4 GHz˜2.5 GHz frequency band and received by the second antennas will interfere with the first antennas, while the signals within the 5.0 GHz˜6.0 GHz frequency band and received by the first antennas will interfere with the second antennas. The first antennas and the second antennas will be interfered with each other consequently if they are not provided with filtering device. 
     Therefore, an additional filter structure is provided to the antennas of different frequency bands to avoid the interference. The filter structure includes a signal line, a connecter, and a wave filter electrically connected to the connecter by the signal line. The individual antenna is combined with the connecter and connected with a signal input end of the wave filter, the signal output end of the wave filter is connected with a relevant electronic equipment. The signals of unwanted frequency bands are attenuated and isolated by using the individual wave filters. Therefore, the antennas of the same frequency band can operate simultaneously without the problem of noise interference. 
     The above-mentioned electronic equipment with the filter structure generally has an aperture on the housing thereof. The filter structure is arranged within the housing. The connecter is arranged through the aperture and exposed out of the housing. A locking component is locked with the exposed connecter so that the connecter can be connected to the signal-receiving electronic components (such as antennas) and the signals with the unwanted frequency band are attenuated and isolated by the wave filter. However, the filter structure assembled in above manner has maintenance problem. Namely, user tends to dismount the filter structure from the electronic equipment by oneself when the filter device malfunctions, this may cause damage of the electronic equipment. 
     Therefore, through diligent research and development process, the inventor resolve the above-mentioned problems in accordance with the above-mentioned conventional technology, that is, the objects the inventor for improving. 
     SUMMARY OF THE INVENTION 
     One object of the present invention supplies a filter device that the filter structure can be locked and fixed optionally from the outside or the inside of the housing to increase the convenience of the whole assembly. 
     For the above-mentioned object, the present invention supplies a filter device including: a housing provided with a through-hole; and a filter structure including: a signal line; a wave filter connected to the signal line, a size of a periphery of the wave filter being smaller than a diameter of the through-hole; and a connecter connected to one end of the signal line and connected electrically with the wave filter. The filter structure is arranged from the outside of the housing through the through-hole correspondingly, so that the signal line and the wave filter are arranged at the inside of the housing and the connecter is fixed at the through-hole. 
     For the above-mentioned object, the present invention supplies a filter device including: a housing provided with a through-hole; and a filter structure including: a signal line; a wave filter connected to the signal line, a size of a periphery of the wave filter being smaller than a diameter of the through-hole; and a connecter connected to one end of the signal line and connected electrically with the wave filter. The filter structure is arranged from the inside of the housing through the through-hole correspondingly, so that the signal line and the wave filter are arranged at the inside of the housing and the connecter is fixed at the through-hole. 
     The present invention also is provided with the following effects. The filter device can attenuate and isolate the unnecessary frequency signals by using the individual wave filters. It can be achieved to avoid the interference when the antennas of the same frequency band are used at the same time. Besides, the filter structure could be locked from the inside of the housing, so the user can not dismount the filter structure by oneself when the filter device goes wrong to avoid the damage of the filter device in favor of the following warranty identified. 
    
    
     
       BRIEF DESCRIPTION OF DRAWING 
         FIG. 1  is an exploded view showing the filter device of the present invention; 
         FIG. 2  is a perspective schematic view showing the filter device of the present invention; 
         FIG. 3  is a cross-sectional schematic view showing the filter device of the present invention; 
         FIG. 4  is an exploded view showing the filter device of another embodiment of the present invention; and 
         FIG. 5  is a cross-sectional schematic view showing the filter device of another embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     It will be described in more details and technical features in connection with the following drawings. The present invention is not limited to those attached drawings but for purposes of illustration only. 
     Please refer to  FIG. 1  to  FIG. 3 , the present invention supplies a filter device, and the filter device includes a housing  1  and a filter structure  2 . 
     The filter device is an electronic equipment with the components of the receiving signals. The electronic equipment can be any type of the electron products, such as antennas, set-up boxes or DVD players. The components of the receiving signals can be the antennas. The housing  1  is the case of the electronic equipment and provided with a through-hole  11 . 
     The filter structure  2  includes a signal line  21 ; a wave filter  22  and a connecter  23 . The wave filter  22  is connected to the signal line  21 , and the size of the periphery of the wave filter  22  is smaller than the diameter of the through-hole  11 . The connecter is connected to one end of the signal line  21  and is connected electrically with the wave filter  22 . The wave filter  22  has a signal feed-in portion  221  and a signal feed-out portion  222  away from the connecter  23  in sequence. The connecter  23  is provided with a protrusion  231  where the size of the periphery is greater than the diameter of the through-hole  11 . The protrusion  231  is a ring block. The protrusion  231  has a threaded rod  232  extended toward the wave filter  22 , wherein a periphery size of the threaded rod  232  is smaller than the diameter of the through-hole  11  and is greater than the size of the periphery of the wave filter  22 . The protrusion  231  is provided with a groove  2311  in the direction toward the wave filter  22 . In addition, the protrusion  231  is provided with a transmission part  233  in the direction away from the wave filter  22 . 
     Referred to the embodiment of the present invention, the filter structure  2  is arranged through the through-hole  11  and from the outside of the housing  1 , so that the signal line  21  and the wave filter  22  are arranged at the inside of the housing  1 . The connecter  23  is fixed at the through-hole  11 . The filter structure  2  is arranged at the outside of the housing  1 , and then the signal line  21  and the wave filter  22  are arranged at the inside of the housing  1  through the through-hole  11 . At this time, the protrusion  231  and the housing  1  are locked each other, so that the transmission part  233  are exposed out of the housing  1 . The present invention further includes a locking component  3 . The locking component  3  is hitched in the filter structure  2  from the inside of the housing  1  and via one end of the signal line  21  away from the connecter  23 . Finally, the locking component  3  is locked corresponding to the threaded rod  232 , so that the connecter  23  is fixed at the through-hole  11 . 
     Hence, the individual antennas are combined with the connecter  23  and connected with the signal feed-in portion  221  of the wave filter  22 . The signal feed-out portion  222  of the wave filter  22  is connected with the relevant electronic equipment such that the individual wave filters  22  can attenuate and isolate the signals of unwanted frequency bands. It can be achieved to avoid the interference when the antennas of the same frequency band are used at the same time. Besides, the filter structure  2  could be locked from the inside of the housing  1 , so the user can not dismount the filter structure  2  by oneself when the filter device malfunctions, whereby avoid the damage of the filter device can be avoided. 
     Furthermore, the present invention further includes two pads  4 . One of the pads  4  is gripped between the locking component  3  and the housing  1 , and another of the pads  4  is gripped between the protrusion  231  and the housing  1  and is interlocked corresponding to the groove  2311  to increase the stability and fitness of the assembly of the present invention. 
     Please refer to  FIG. 4  and  FIG. 5 , in another embodiment of the present invention of the filter device, a threaded rod  232  is extended from the protrusion  231  in a direction away from the wave filter  22 , and a transmission part  233  is extended from the threaded rod  232  of the connecter  23 . 
     Referred to this embodiment, the filter structure  2  is arranged through the through-hole  11  corresponding to the inside of the housing  1 . The filter structure  2  is arranged at the inside of the housing  1 , and then the connecter  23  is arranged through the through-hole  11  and exposed out of the housing  1 . At this time, the protrusion  231  and the housing  1  are locked with each other, so that the signal line  21  and the wave filter  22  are arranged at the inside of the housing  1 . The present invention further includes a locking component  3  and the pad  4 . The locking component  3  and the pad  4  are hitched in the threaded rod  232  through the outside of the housing  1  via the transmission part  233 . Finally, the locking component  3  is locked corresponding to the threaded rod  232 , so that the connecter  23  is fixed at the through-hole  11  and the pad  4  is gripped between the locking component  3  and the housing  1 . Hence, compared with the embodiment shown  FIG. 1  to  FIG. 3 , the filter structure  2  of the present invention can be locked and fixed optionally from the outside or from the inside of the housing  1  to increase the convenience of the whole assembly. 
     In summary, the desired object truly can be achieved according to the filter device of the present invention to solve the defect of the conventional technology and is provided with the Novelty, Inventive steps (progressiveness) and Industrial applicability. The inventor files an application based on the Patent Law. Please exam in detail and allow the application to protect the right of the inventor.