Abstract:
The present invention pertains to a coaxial connector including an insulating base disposing a central terminal passing through a hole thereof to facilitate signal transmission, a first and a second terminals including secure plates to be disposed on a deep slot of the insulating base, a waterproof ring, and a metal shell. Wherein, the secure plates have fixing flanks to strengthen the firmness between the terminals and the insulating base. Wave-shaped contacts with high resilience further protrude from the fixing flanks to prop against or separate from the switch button of the mobile communication device for getting through or disconnecting the communication. Through the highly elastic contacts, the terminals still maintain to firmly contacting with the switch button or rapidly bouncing back even when being subjected to a long-term compression and ensure the stability of the mutual signal transmission among the mobile communication devices.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a coaxial connector, in particular to a coaxial connector applying for mobile communication devices. 
   2. Description of the Related Art 
   There is a wide application of apparatus used to a mobile communication device in the real life, for instance of an intercom which is one of the main communication devices for functions of public securing or traffic controlling. Conventionally, the intercom mainly has a body and an antenna system to receive external signals. For receiving signals, the antenna is typically bound to an exteriorly assembled coaxial connector of the body providing with a signal converting circuit. In addition, the coaxial connector has to dispose terminals therein which further engage with a switch button in the body hence achieving a mutual communication. Therefore, the attachment of the terminals with the coaxial connector is a critical factor implementing to efficiently receive external signals and achieve mutual communications. 
   However, the infirm installation of the conventional coaxial connector commonly exists while the terminals are not well incompliance with its insulating base, which negatively incurs the deviation and departure of terminals from the connector or causes other inferiors. Moreover, since the intercom is highly used, the contact frequency between the switch button and the coaxial connector is raised. Over a long-term compression, the elasticity of the terminals becomes weak, and the contact of the terminals and the switch button is relatively affected, which may result of an improper contact and clogged communication and obstruct the implement of the public security. That is, if the improper contact and clogged communication occur, the suspicious staffs may have the opportunity of escaping while on duty and make serious consequences. Further, the conventional connector requires complex manufactures and installations, and the replacement with a new one usually needs complicated procedures and even causes the unwillingness of using the connector for people. Accordingly, due to the complicated and inefficient assembling procedure of the conventional coaxial connector, the present invention is hence provided. 
   SUMMARY OF THE INVENTION 
   One object of the present invention is to provide a coaxial connector for enhancing stability of the signal transmission and prolonging the life time of products. 
   Another object of the present invention is to provide a coaxial connector that can be readily assembled, thereby promoting the installing efficiency and declining the percentage of inferior products. 
   The coaxial connector in accordance with the present invention mainly provides with an insulating base, a central terminal, a first terminal, a second terminal, a waterproof ring, and a metal shell. Wherein, the insulating base includes a lower base and an upper base defining a central stand providing a hole to be penetrated by the central terminal. The central stand has its back to be constructed by a lateral wall, from both ends of which two side walls respectively extended and equidistantly spaced with respect to sides of the central stand. Wherein, one of the two side walls has a deep slot, comprised of a first slot and a second slot, laterally disposed through the lateral wall for receiving the first and second terminals. The first and second terminals have respective secure plates that are correspondingly firmly connected with walls of the first and second slots, and the secure plates further contain a plurality of fixing flanks with wave-shaped contacts attaching thereon. The wave-shaped contacts especially have high resilience and a capability of readily bouncing back so as to guarantee a firm contact of the switch button and the coaxial connector while being subjected to a long-term compression and enhance the quality of the mutual communications. 
   Further by the integration of the lower base with the upper base, the above terminals are firmly positioned in the insulating base, so as to avoid deviation of the terminals and prevent bad influence on the connector arising from the departure. Moreover, signals can be received and transmitted by the central terminal of the coaxial connector contacting a separate antenna of the mobile communication device; thereby, communication can be transported or disconnected by the contact or interruption between the switch button and the wave-shaped contacts protruded from the first and second terminals. Owing to the characteristic of the wave-shaped contacts, they are able to maintain their resilience along with a firm connection with the switch button for ensuring the stability of the mutual signal transmissions among the mobile communication devices. 
   Therefore, the present invention applies the correlation of above elements to firmly position the terminals and the insulating base and accompanies the wave-shaped contacts with high elasticity that densely touch and cooperate with the switch button, thereby achieving a more stable signal transmission of communication, a quick assembling of the coaxial connector, and prolonging products life time 
   The advantages of the present invention over the known prior arts will become more apparent to those of ordinary skilled in the art by reading the following descriptions with relating drawings. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view showing the present invention; 
       FIG. 2  is a plan view showing a top view of the upper base of the present invention; 
       FIG. 3  is a perspective view showing a bottom view of the upper base of the present invention; 
       FIG. 4  is a perspective view showing the combination of the terminals and the upper base of the present invention; 
       FIG. 5  is a perspective view showing the configuration of  FIG. 4  assembling to the lower base; 
       FIG. 6  is a perspective view showing both the waterproof ring and the metal shell installing on the combination of  FIG. 5 ; and 
       FIG. 7  is a perspective view showing the integral structure of the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Before describing in greater detail, it should note that the like elements are denoted by the similar reference numerals throughout the disclosure. 
   Referring to  FIG. 1 , the coaxial connector  100  of the present invention mainly provides with an insulating base  1 , a central terminal  2  disposed in the insulating base  1 , a first terminal  3 , a second terminal  4 , a waterproof ring  5 , and a metal shell  6 . 
   Referring to  FIGS. 1 ,  2 , and  3 , the insulating base  1  includes a lower base  12  and an upper base  11 . Wherein, the upper base  11  has a central stand  111  defining an unclosed round recess  112  on its top surface, where a round protrusion  114 , including a central cylinder  113  disposed among it, is protruded. A plurality of gripping blocks  115  are equidistantly mounted around the outer periphery of the round protrusion  114  and the inner wall of the unclosed round recess  112 . An indentation  116  with a U-shaped notch  117  provided thereon is defined on the bottom surface of the central stand  111 ; the U-shaped notch  117  further installs a hole  118  in the front thereof to go through the central stand  111 . In particular, the central stand  111  has its back to be constructed by a lateral wall  131 , from both ends of which a broad side wall  141  and a narrow side wall  151  oppositely extended and equidistantly spaced with respect to both sides of the central stand  111  by an interval. Wherein, the broad side wall  141  has a deep slot  142  defined on the bottom surface thereof that transversely penetrates through the lateral wall  131  and consists of a first and a second slots  143 ,  144 . Relatively, the narrow side wall  151  includes a fixing notch  152  communicating with the deep slot  142  so as to form a holder  153  that is located on a wall of the fixing notch  152  distant from the lateral wall  131  and provided with a receiving notch  154  thereon. 
   Still, the lower base  12  has a bottom stand  121 , a central support  122  protruding from the stand  121  to be fitly wedged into the indentation  116 , and a backboard  123  formed around the bottom stand  121 . The backboard  123  is designed in compliance with the deep slot  142  of the upper base  11  and formed in a stairway structure at its side periphery. A support stand  124 , which has a wedging notch  125  disposed thereon for fixing the terminals, is defined at the outer side of the backboard  123  to engage with the broad wall  141  of the upper base  11 . 
   The central terminal  2  has a central secure member  21 , a strengthening band  22  on the central secure member  21  for allowing the central terminal  2  to be firmly fixed to the upper base  11 , and a central insertion portion  23  integrally defined at the bottom of the central secure member  21  for outwardly connecting a circuit board. 
   The first and second terminals  3 ,  4  have their respective secure plates  31 ,  41 ; wherein, the first secure plate  31  and the second secure plate  41  herein are flatwisely structured by a lying ‘ 7 ’ shape. The first secure plate  31  has a first longitudinal plate  311  directly extending outward and terminating at a first insertion  32 , a first transverse plate  312  whose rear portion is bended, and a short fixing flank  33  extending from the inflection of the transverse plate  312  so that the fixing flank  33  is parallel to the first longitudinal plate  311  and is wedged into the fixing notch  152 . Particularly, the short fixing flank  33  outwards forms a first wave-shaped  34  contact that performs in an incessant undulation with an equal width. Likewise, at one end of a second longitudinal plate  411  of the second terminal  4  curvedly defines a transition plate  42  parallel to a second transverse plate  412 ; thence, a fixing plate  43  parallel to the second longitudinal plate  411  is defined at the inflection of the transition plate  42 , and a second insertion  44  is located at the end of the fixing plate  43 . Furthermore, the second secure plate  41  has the second transverse plate  412  bending along its rear portion to define a long fixing flank  45  which is parallel to the second longitudinal plate  411  and protrudes a vertical plate  46  from the front edge of the flank  45 ; the vertical plate  46  is further bent and then projects a second wave-shaped contact  47  therefrom. The wave-shaped contacts  34 ,  47  both provide with the characteristic of high resilience for efficiently bearing against the outer force by pressing the switch button and rapidly bouncing themselves back while being not subjected to the outward force, so as to promote the utility of the terminals. 
   The waterproof ring  5  is mainly beneficial to prevent the coaxial connector from being saturated with water. The waterproof ring  5  wedges into the central stand  111  of the upper base  11  and further has a column  51  with an opening  52 ; a plurality of recesses  53  are equidistantly segmented along the bottom surface of the column  51  to fit with the gripping blocks  115 , whereby the waterproof ring  5  can be firmly assembled to the upper base  11 . 
   The metal shell  6  has a cannular sleeve  61  with a plurality of side arms  62  defined along the circumference of the cannular sleeve  62 , at least two fixed legs  621  protruded from the front edge of the side arms  62 , and a plurality of holder blocks  622  laterally defined on the bottom edge of the side arms  62 . 
   Further, the central, the first and the second terminals  2 ,  3 ,  4  are respectively punched and made of metal planking. While in installation, those punched terminals are discretely assembled to the upper base  11  as illustrated in  FIG. 4 . The central secure member  21  of the central terminal  2  thence penetrates through the hole  118  of the upper base  11  and renders the central insertion portion  23  to snap into the U-shaped notch  117  and partially expose out of the upper base  11 . With regard to  FIGS. 1 through 4 , the first terminal  3  has to be assembled before the second terminal  4 . Namely the first secure plate  31  is initially engaged to the inner wall of the first slot  143 , and the short fixing flank  33  is then positioned within the fixing notch  152  for exposing the first wave-shaped contact  34 . Thereafter, the second secure plate  41  firmly contacts with the wall of the second slot  144  so as to keep the interstice between the first and second secure plates  41 ,  31 . Moreover, the long fixing flank  45  longer than the short fixing flank  33  tends to be embedded into the receiving notch  154  of the holder  153 , whereby the second terminal  4  can be firmly disposed on the upper base  11 . The second wave-shaped contact  47  also exposes from the long fixing flank  45  and juxtaposes with respect to the first wave-shaped contact  34  (shown in  FIG. 5 ). 
   Thereafter, the lower base  12  and the upper base  11  can be a congregate assembly by following the succeeding steps. Referring to  FIGS. 1 to 5 , the central terminal  2  is firmly suited in the insulating base  1  by fitly placing the central support  122  into the indentation  116 . The backboard  123  of the lower base  12  structuring a stairway contour at the side periphery thereof is inserted into the deep slot  142  to directly prop and position the first and second terminals  3 ,  4  and absolutely separate the first terminal  3  from the second terminal  4 , hereby the terminals are firmly fixed to the upper base  11 . In addition, the fixing plate  43  of the second terminal  4  is also wedged into the wedging notch  125  of the lower base  12 , hence accomplishing the installation of the upper base  11  with the lower base  12  and rendering the central, first, and second terminals  2 ,  3 ,  4  not to be readily deviate from the insulating base  1  for securing a stable signals transmission, which can be clearly shown in  FIG. 5 . After assembling the upper and lower bases  11 ,  12 , the assembly is associated by ultrasonic wave. 
   Further referring to  FIGS. 1 and 6 , the waterproof ring  5  is mounted on the central stand  111  of the upper base  11 . It should be noted that the holder blocks  622  are erect structures for buckling themselves on the central stand  111  before embedding the side arms  62  of the metal shell  6  succeedingly among the interval between the central stand  111  and the two side walls  141 , 151 . The metal shell  6  further facilitates connecting the antenna and fixing the waterproof ring  5 . Therefore, the assembled and complete coaxial connector  100  is accomplished as shown in  FIG. 7 . 
   To sum up, the present invention takes advantages of a central terminal engaging with an antenna of a communication device to transmit signals. Furthermore, a first terminal and a second terminal have stable secure plates and fixing flanks to enable each terminal to be firmly and separately fixed in an insulating base while assembling the upper and lower bases together, which efficiently eliminates the deviation of terminals and achieves a more stable signal transmission. Further, the wave-shaped contacts protruded from the terminals have the characteristic of high resilience contributing readily bouncing back, thereby ensuring the dense contact of terminals with a switch button under a long-term compression and promoting the mutual communicating stability among mobile communication devices. 
   While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.