Coaxial connector
[technical field]
The present invention relates to a kind of coaxial connector, relate in particular to the structure of improving that it makes the center terminal impedance balance.
[background technology]
The prior art relevant to invention, consulting publication number is U.S.'s publication of US5853295.The disclosure patent has disclosed a kind of coaxial connector, but its surface soldered is on circuit board, described coaxial connector comprises outer conductor, is contained in the insulation of outer conductor and is immobilizated in the interior center terminal of insulator, described center terminal comprises that the holding parts that is retained in insulator reaches the weld part perpendicular to holding parts, described insulator and center terminal all do not exceed the edge of outer conductor, described insulator is provided with fluting, described weld part is contained in fluting, yet the impedance of such design port is less, and electrical property is relatively poor under high frequency situations.
So, be necessary to design a kind of novel coaxial connector to solve the problems of the technologies described above.
[summary of the invention]
Technical problem to be solved by this invention is to provide a kind of coaxial connector, the impedance balance of the center terminal of this coaxial connector.
for solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of coaxial connector, but its surface soldered is on circuit board, described coaxial connector comprises outer conductor, be contained in the insulator in outer conductor and be immobilizated in the interior center terminal of insulator, described center terminal comprises the coaxial first that is housed in outer conductor, a vertically extending second portion of end from first, described second portion comprises weld part, described insulator is provided with along the outstanding protuberance of the bearing of trend of the second portion of center terminal, be provided with clearance space between described protuberance and weld part, described protuberance is in order to regulate impedance balance.
Compared to prior art, coaxial connector of the present invention increases the impedance of port by protuberance of design on insulator, and electrical property is better under high frequency situations.
[description of drawings]
Shown in Figure 1 is that coaxial connector of the present invention is arranged on the stereogram on circuit board.
Fig. 2 is that coaxial connector shown in Figure 1 is along the cutaway view of A-A direction.
The stereogram that to be coaxial connector of the present invention separate with circuit board shown in Figure 3.
Shown in Figure 4 is the exploded view of coaxial connector of the present invention.
Fig. 5 is the exploded view of another angle of coaxial connector of the present invention shown in Figure 4.
[embodiment]
As Fig. 1 to shown in Figure 5, but a kind of coaxial connector 100 its surface soldered on circuit board 200, described coaxial connector 100 comprises outer conductor 10, is contained in the insulator 20 in outer conductor 10 and is retained on center terminal 30 in insulator 20.Described center terminal 30 comprise coaxial be housed in first 31 in outer conductor 10, from a vertically extending second portion 32 of end of first 31.Described first 31 comprise the holding parts 310 that is immobilizated in insulator 20, with the coaxial docking section that is connected 311 of holding parts 310, described holding parts 310 and docking section 311 are all that the diameter of columniform and docking section 311 is less than the diameter of holding parts 310; Described second portion 32 comprises with the perpendicular weld part 320 of holding parts 310 and is connected holding parts 310 and the pars intermedia 321 of weld part 320, the width of described pars intermedia 321 is greater than the width of weld part 320, described weld part 320 extends beyond outer conductor 10, described weld part 320 and pars intermedia 321 are all flat, and described first 31 and second portion 32 are single type structures.
Described insulator 20 is provided with along the outstanding protuberance 21 of the bearing of trend of the second portion 32 of center terminal 30, described protuberance 21 does not extend beyond outer conductor 10, be provided with clearance space 25 between described protuberance 21 and weld part 320, thereby make the impedance of port increase to realize the impedance balance of center terminal 30 and outer conductor 10.Described insulator 20 also comprises main part 22, described main part 22 comprises the installed surface 220 that is arranged on circuit board, described being provided with on installed surface 220 and the groove 23 of protuberance 21 at same bearing of trend, the pars intermedia 321 of described center terminal 30 is contained in groove 23, weld part 320 from the end of groove 23 begin to stretch out and begin with this part and protuberance 21 between clearance space 25 is arranged.Described groove 23 is provided with the accepting hole 24 that runs through up and down in order to the holding parts 310 of Collecting Center terminal 30, and the weld part 320 of described center terminal 30 extends from groove 23 and is welded in circuit board 200 surfaces.When coaxial connector 100 is arranged on circuit board 200, protuberance 21 from the distance of circuit board 200 greater than the distance of groove 23 from circuit board 200.
Described outer conductor 10 comprises the first receiving space 11 and the second receiving space 12 that communicates with the first receiving space 11, and described first, second receiving space 11,12 is all cylindrical.Described insulator 20 is contained in the first receiving space 11, and the docking section 311 of center terminal 30 extends into the second receiving space 12 and docks with butt connector.Described outer conductor 10 comprises the base portion 13 that is installed on circuit board 200 and the columniform body 14 that is connected with base portion 13, and the diameter of described body 14 is less than the width of base portion 13.
Compared to prior art, coaxial connector 100 of the present invention the impedance of port is increased, thereby electrical property is better under high frequency situations by protuberance 21 of design on insulator 20.