CN211126365U - SMA type radio frequency coaxial connector - Google Patents
SMA type radio frequency coaxial connector Download PDFInfo
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- CN211126365U CN211126365U CN202020187857.XU CN202020187857U CN211126365U CN 211126365 U CN211126365 U CN 211126365U CN 202020187857 U CN202020187857 U CN 202020187857U CN 211126365 U CN211126365 U CN 211126365U
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Abstract
The utility model relates to a SMA type radio frequency coaxial connector, including first shell, the connection swivel nut on first shell is established to rotatable cover, the inner conductor and the cover that set up in first shell establish on the inner conductor and lie in the insulator between first shell and the inner conductor, the front end outside of insulator is along the interior concave step that forms of axial of insulator, radial interior protruding being formed with along first shell on the front end inner wall of first shell can with the first boss of step cooperation butt, step and first boss cooperation butt prevent that the insulator from sliding and breaking away from first shell to the front end of connector. Through the design of the step on the front end face of the insulator, the front end of the first shell and the first boss matched with the step, after assembly is completed, the insulator is fixed between the first shell and the inner conductor through the matching of the step and the first boss, so that the assembly is reliable and convenient, and the insulator of the connector cannot drop when temperature test or use environment temperature change is completed, and the reliability of signal transmission can be ensured.
Description
Technical Field
The utility model belongs to the technical field of the radio frequency coaxial connector, concretely relates to SMA type radio frequency coaxial connector.
Background
Conventional rf coaxial connectors are classified according to their use: a microstrip type radio frequency coaxial connector and a radio frequency connector connected with a coaxial cable. The structure of the cable-connected radio frequency connector can be divided into: welding structure, crimping structure, dress connection structure.
When the existing SMA type radio frequency coaxial connector is connected with a cable with the diameter below 5mm, in order to obtain good electrical performance indexes, the insulation support generally does not change greatly in diameter, and is generally of a through structure, for example, the SMA type radio frequency coaxial connector disclosed in chinese patent CN207116860U includes a first shell and a threaded sleeve sleeved outside the first shell, the first shell and the threaded sleeve are axially limited by a snap ring, an insulator is sleeved in the first shell, a second shell is sleeved in a through hole at the right end of the first shell, an external cable is used for being introduced and fixed in the second shell, an inner conductor of the external cable is fixedly connected with a contact pin, the contact pin is clamped in the insulator, and an insulation sheet is clamped outside the external cable at the left side of the second shell. This can lead to joining the assembled cable subassembly, when carrying out high low temperature test in the later stage, because temperature variation, the insulating support of the influence of expend with heat and contract with cold can take place the phenomenon that drops out.
Disclosure of Invention
In order to solve the deficiencies in the prior art, the utility model provides an improved SMA type radio frequency coaxial connector.
For solving the technical problem, the utility model discloses a following technical scheme:
an SMA type radio frequency coaxial connector comprises a first shell, a connecting threaded sleeve, an inner conductor and an insulator, wherein the connecting threaded sleeve is rotatably sleeved on the first shell, the inner conductor is arranged in the first shell, the insulator is sleeved on the inner conductor and is positioned between the first shell and the inner conductor, the outer side of the front end of the insulator is inwards concave along the axial direction of the insulator to form a step, a first boss capable of being matched and abutted with the step is formed on the inner wall of the front end of the first shell along the radial direction of the first shell, and the step and the first boss are matched and abutted to prevent the insulator from sliding towards the front end of the connector to be separated from the first shell.
In a further embodiment, the height H of the step in the axial direction of the insulator is 0.2 ± 0.05 mm.
In a further embodiment, the inner conductor includes a first inner conductor section located at the front end of the connector and extending in the axial direction of the connector, a second inner conductor section formed by extending the end of the first inner conductor section rearward in the axial direction of the connector, and a third inner conductor section formed by extending the end of the second inner conductor section rearward in the axial direction of the connector, the outer diameter of the first inner conductor section is smaller than that of the second inner conductor section, the outer diameter of the second inner conductor section is smaller than that of the third inner conductor section, and the insulator is sleeved on the second inner conductor section and abuts against the third inner conductor section.
In a further embodiment, the inner side of the rear end face of the insulator is convex outward in the axial direction of the insulator to form a second boss, and the second boss abuts against the end faces of the three sections of the inner conductor.
In a further embodiment, the rear end of the three sections of the inner conductor is provided with an insertion hole along the axial direction for inserting an external cable.
Preferably, a side surface of the rear end of the insulator is convex in a radial direction of the insulator to be a convex portion for abutting the insulator between the inner conductor and the first housing.
In a further embodiment, a first groove is formed in the outer side surface of the front end of the first shell along the circumferential direction of the first shell, a second groove corresponding to the first groove is formed in the inner side wall of the connecting threaded sleeve, and snap rings are arranged in the first groove and the second groove.
In further embodiment, the connector is still including setting gradually insulating piece, bush and the second shell behind the inner conductor, the second shell with first shell is connected will insulating piece and bush press to be established between first shell and the second shell, the insulating piece still is located between inner conductor and the bush, just the insulating piece still is used for with inner conductor presses to be established between insulator and the insulating piece.
In a further embodiment, the inner wall of the rear end of the first housing is provided with an internal thread, and the outer side surface of the second housing is provided with an external thread which can be in threaded connection with the internal thread of the first housing.
In a further embodiment, a first blocking portion for limiting the bushing between the first outer shell and the second outer shell and a second blocking portion for limiting the insulation sheet between the bushing and the first outer shell are sequentially distributed on the inner wall of the rear end of the first outer shell along the axial direction thereof.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the utility model discloses the connector is through the front end design step at the preceding terminal surface of insulator, the first boss of first shell and step complex, accomplishes the assembly back, fixes the insulator between first shell and inner conductor through the cooperation of step and first boss, and is reliable convenient again promptly, and the assembly accomplish the insulator of connector can not take place to drop when carrying out temperature test or service environment temperature variation, can guarantee that signal transmission is reliable.
Drawings
Fig. 1 is a schematic half-sectional structure view of an SMA type rf coaxial connector according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of an insulator of an SMA type rf coaxial connector according to an embodiment of the present invention;
in the figure: 1. a first housing; 11. a first boss; 12. a first blocking portion; 13. a second blocking portion; 2. connecting a threaded sleeve; 3. an inner conductor; 31. an inner conductor section; 32. an inner conductor section; 33. three sections of inner conductors; 4. an insulator; 41. a step; 42. a second boss; 43. a boss portion; 5. a snap ring; 6. an insulating sheet; 7. a bushing; 8. a second housing; 9. a cavity; 10. and (5) sealing rings.
Detailed Description
The invention is further described below with reference to the drawings in the specification:
the SMA type radio frequency coaxial connector shown in fig. 1 to 2 includes a first housing 1, a connection threaded sleeve 2 rotatably sleeved on the first housing 1, an inner conductor 3 disposed in the first housing 1, and an insulator 4 sleeved on the inner conductor 3 and located between the first housing 1 and the inner conductor 3. The outside of the front end of the insulator 4 is inwards concave along the axial direction of the insulator 4 to form a step 41, a first boss 11 which can be matched and abutted with the step 41 is inwards convex along the radial direction of the first shell 1 on the inner wall of the front end of the first shell 1, and the step 41 and the first boss 11 are matched and abutted to prevent the insulator 4 from sliding towards the front end of the connector and separating from the first shell 1.
The height H of the step 41 in the axial direction of the insulator 4 is 0.2 ± 0.05 mm.
In this example, the inner conductor 3 includes an inner conductor section 31 located at the front end of the connector and extending along the axial direction of the connector, an inner conductor section 32 formed by extending the rear end of the inner conductor section 31 rearward along the axial direction of the connector, and an inner conductor section 33 formed by extending the rear end of the inner conductor section 32 rearward along the axial direction of the connector, the outer diameter of the inner conductor section 31 is smaller than that of the inner conductor section 32, the outer diameter of the inner conductor section 32 is smaller than that of the inner conductor section 33, and the insulator 4 is sleeved on the inner conductor section 32 and abuts against the inner conductor section 33.
Specifically, the inside of the rear end face of the insulator 4 is protruded outward in the axial direction of the insulator 4 as a second boss 42, and the second boss 42 abuts against the front end face of the inner conductor three-stage 33, so that the insulator 4 is pressed between the first housing 1 and the inner conductor 3 by the inner conductor 3. The rear end of the inner conductor three section 33 is provided with a jack along the axial direction for inserting an external cable, the front end of the inner conductor one section 31 is conical, and the inner conductor one section 31 is used as a contact pin.
The side face at the rear end of the insulator 4 is convex in the radial direction of the insulator 4 to form a boss portion 43 for abutting the insulator 4 between the inner conductor 3 and the first housing 1.
This connector still includes insulating piece 6, bush 7 and the second shell 8 that sets gradually at inner conductor 3 rear, and second shell 8 and first shell 1 threaded connection press insulating piece 6 and bush 7 to be established between first shell 1 and second shell 8, and insulating piece 6 still is located between inner conductor 3 and the bush 7, and insulating piece 6 still is used for pressing inner conductor 3 to be established between insulator 4 and insulating piece 6.
Specifically, the front end face of the insulating sheet 6 abuts against the rear end face of the inner conductor 3, and the insulator 4 is sleeved on the inner conductor section 32 of the inner conductor 3, so that a cavity is formed between the inner conductor section 33 and the first housing 1, and the cavity is filled with air, so that air transition is adopted between the insulator 4 and the insulating sheet 6.
A first blocking portion 12 for limiting the bushing 7 between the first housing 1 and the second housing 8 and a second blocking portion 13 for limiting the insulation sheet 6 between the bushing 7 and the first housing 1 are sequentially distributed on the inner wall of the rear end of the first housing 1 along the axial direction thereof.
An internal thread is arranged inside the rear end of the first shell 1, and an external thread which can be in threaded connection with the internal thread of the first shell 1 is arranged on the outer side face of the second shell 8.
In this embodiment, a first groove is formed in the outer side surface of the front end of the first housing 1 along the circumferential direction, a second groove corresponding to the first groove is formed in the inner side wall of the connecting screw sleeve 2, a snap ring 5 is arranged in the first groove and the second groove, the first housing 1 and the connecting screw sleeve 2 are movably connected through the snap ring 5, the connecting screw sleeve 2 can be clamped at the front end of the first housing 1 through the snap ring 5, and the connecting screw sleeve 2 can be guaranteed to rotate relative to the first housing 1.
In this example, the connection screw sleeve 2, the first housing 1 and the second housing 8 are made of stainless steel materials, so that the environment-resistant reliability of the connector is improved. The connecting screw sleeve 2 is provided with a lead sealing hole and is fixed through a lead wire, so that the connection reliability is improved.
The assembling process of the SMA type radio frequency coaxial connector and the external cable is as follows: the cable passes through the second shell 8, then weld the bush 7 with the shielding layer of cable, establish the insulating piece 6 cover on the cable core, then insert the cable core in the jack of inner conductor 3 rear end and weld inner conductor 3 and cable core, then pack into the first shell 1 that has been equipped with insulator 4 together, and make inner conductor 3 insert in the insulator 4, then with second shell 8 and first shell 1 threaded connection, and then with bush 7, insulating piece 6 press and establish between first shell 1 and second shell 8, thereby fix insulator 4 and inner conductor 3 in first shell 1. Then the snap ring 5 is arranged in the first groove, the sealing ring is arranged at the corresponding position of the front end of the first shell 1, and finally the connecting threaded sleeve 2 is sleeved at the front end of the first shell 1, so that the periphery of the snap ring 5 is clamped in the second groove, and the assembly is completed.
Through the setting, the SMA type radio frequency coaxial connector has the following advantages:
1) this connector sets up the step through the preceding terminal surface at the insulator, cooperates the design of the first boss of the preceding terminal surface of first shell, and the connector assembly is accomplished the back, can be fixed with the insulator between inner conductor and first shell, and the assembly is not only reliable but also convenient, and can guarantee connector interface size completely.
2) This connector sets up the step through the preceding terminal surface at the insulator, cooperates the design of the first boss of the preceding terminal surface of first shell, and the connector assembly is accomplished the back, still makes the assembly accomplish carry out temperature test or when service environment temperature changes the insulator of connector can not take place to drop, can guarantee completely that signal transmission is reliable, and the assembly easy operation of connector has improved yield and work efficiency.
3) The front end face of the second boss and the front end face of the inner conductor are abutted between the insulator and the inner conductor of the connector, the rear end of the inner conductor is provided with the insulating sheet to press the inner conductor between the insulator and the insulating sheet, so that the inner conductor cannot be retracted and displaced due to the movement of the inner conductor of the cable, and the reliable transmission of signals of the assembled cable assembly in use is ensured.
4) The inner conductor and the first shell of the connector adopt a step dislocation compensation design, and the rear section adopts air transition, so that the superiority of the high-frequency electrical performance of the whole connector is ensured, and the electrical performance index of the high frequency is ideal.
In a word, the connector guarantees the requirements of excellent high-frequency performance and environment resistance, and ensures that the insulator of the connector does not fall off when the temperature test is carried out or the use environment temperature changes after the cable is assembled, thereby improving the rate of finished products of connector assembly and improving the working efficiency.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. The utility model provides a SMA type radio frequency coaxial connector, includes first shell, rotatable cover and establishes connect swivel nut, setting on the first shell are in inner conductor and cover in the first shell are established on the inner conductor and be located insulator between first shell and the inner conductor, its characterized in that: the outer side of the front end of the insulator is inwards concave along the axial direction of the insulator to form a step, a first boss which can be matched and abutted with the step is inwards convex along the radial direction of the first shell on the inner wall of the front end of the first shell, and the step and the first boss are matched and abutted to prevent the insulator from sliding towards the front end of the connector and separating from the first shell.
2. The SMA-type radio frequency coaxial connector of claim 1, wherein: the height H of the step along the axial direction of the insulator is 0.2 +/-0.05 mm.
3. The SMA-type radio frequency coaxial connector of claim 1, wherein: the inner conductor comprises an inner conductor section, an inner conductor second section and an inner conductor third section, wherein the inner conductor section is located at the front end of the connector and extends along the axial direction of the connector, the inner conductor second section is formed by extending the end part of the inner conductor section backwards along the axial direction of the connector, the inner conductor third section is formed by extending the end part of the inner conductor second section backwards along the axial direction of the connector, the outer diameter of the inner conductor first section is smaller than that of the inner conductor second section, the outer diameter of the inner conductor second section is smaller than that of the inner conductor third section, and the insulator is sleeved on the inner conductor second section and is abutted against the inner conductor third section.
4. The SMA-type radio frequency coaxial connector according to claim 3, wherein: the inner side of the rear end face of the insulator protrudes outwards along the axial direction of the insulator to form a second boss, and the second boss is abutted to the end faces of the three sections of the inner conductor.
5. The SMA-type radio frequency coaxial connector according to claim 3, wherein: and the rear end of the inner conductor three sections is provided with jacks for inserting external cables along the axial direction.
6. The SMA-type radio frequency coaxial connector of claim 1, wherein: the side face of the rear end of the insulator is convex outwards along the radial direction of the insulator to form a protruding part used for enabling the insulator to be tightly abutted between the inner conductor and the first shell.
7. The SMA-type radio frequency coaxial connector of claim 1, wherein: the front end outer side surface of the first shell is provided with a first groove along the circumferential direction, the inner side wall of the connecting threaded sleeve is provided with a second groove corresponding to the first groove, and clamping rings are arranged in the first groove and the second groove.
8. An SMA type radio frequency coaxial connector according to any one of claims 1-7, wherein: the connector is still including setting gradually insulating piece, bush and the second shell at inner conductor rear, the second shell with first shell is connected will insulating piece and bush press to be established between first shell and the second shell, the insulating piece still is located between inner conductor and the bush, just the insulating piece still is used for with the inner conductor is pressed and is established between insulator and the insulating piece.
9. The SMA-type radio frequency coaxial connector of claim 8, wherein: the inner wall of the rear end of the first shell is provided with an internal thread, and the outer side face of the second shell is provided with an external thread which can be in threaded connection with the internal thread of the first shell in a matching mode.
10. The SMA-type radio frequency coaxial connector of claim 8, wherein: and a first blocking part used for limiting the bushing between the first shell and the second shell and a second blocking part used for limiting the insulating sheet between the bushing and the first shell are sequentially distributed on the inner wall of the rear end of the first shell along the axial direction of the first shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020187857.XU CN211126365U (en) | 2020-02-20 | 2020-02-20 | SMA type radio frequency coaxial connector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020187857.XU CN211126365U (en) | 2020-02-20 | 2020-02-20 | SMA type radio frequency coaxial connector |
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| CN211126365U true CN211126365U (en) | 2020-07-28 |
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| CN202020187857.XU Active CN211126365U (en) | 2020-02-20 | 2020-02-20 | SMA type radio frequency coaxial connector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636068A (en) * | 2020-12-18 | 2021-04-09 | 陕西航空电气有限责任公司 | Ignition cable contact pin type connecting structure |
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2020
- 2020-02-20 CN CN202020187857.XU patent/CN211126365U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636068A (en) * | 2020-12-18 | 2021-04-09 | 陕西航空电气有限责任公司 | Ignition cable contact pin type connecting structure |
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