CN213879832U - Radio frequency test head - Google Patents
Radio frequency test head Download PDFInfo
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- CN213879832U CN213879832U CN202022849176.8U CN202022849176U CN213879832U CN 213879832 U CN213879832 U CN 213879832U CN 202022849176 U CN202022849176 U CN 202022849176U CN 213879832 U CN213879832 U CN 213879832U
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Abstract
The radio frequency test head comprises a main body, a front end and a rear end, wherein the front end and the rear end of the main body are respectively provided with an open connecting end and a test end along the axial direction, and a contact head which is elastically retracted relative to the front end along the axial direction is arranged in the test end; the main body comprises a connecting section and a testing section which are formed independently; the connecting end is formed at the rear end of the connecting section, and an annular step surface is formed at the front end of the connecting section through the connecting sleeve; the rear end of the testing section is screwed in the connecting sleeve, the testing end is formed at the front end of the testing section, and the front end of the testing section is formed with an annular retainer ring which is radially folded; the insulator comprises a first insulating section and a second insulating section which are independently formed; a retainer ring blocked by an annular step surface is formed at the front end of the first insulating section; the front end of the second insulating section is blocked by an annular retainer ring, and the rear end of the second insulating section is abutted against the first insulating section so that the retainer ring is pressed on the annular step surface; the front end face of the second insulating section is also provided with an insulating sleeve which penetrates through the annular retainer ring forwards along the axis, and the needle shaft is coaxially matched in the insulating sleeve.
Description
Technical Field
The utility model relates to a radio frequency technology field, it is radio frequency test head specifically.
Background
Radio frequency, RF for short, is a high frequency electromagnetic wave with long distance transmission capability that is widely used in the field of wireless communications. Given that wireless communications operate in an electromagnetic environment, products or systems must be radio frequency tested before they enter the market.
For more efficient and accurate testing, it is a major research and development direction in the industry to improve the motion conduction part of the test operation of the test rf head. The prior art proposes a modification as shown in fig. 1: the insulator in the radio frequency test head is divided into three mutually independent parts, a first insulator 12 'and a second insulator 13' are fixed in a shell 11 ', and a needle tube 14' is provided with a mounting part inserted in the first insulator 12 'and a receiving part inserted in the second insulator 13'; one end of the needle shaft 16' is positioned in the accommodating part, and the other end thereof extends out of the accommodating part; a first spring 15 'is mounted between the needle shaft 16' and the housing; a contact 19 ' is fixed to one end of the housing 11, a third insulator 17 ' is located within the contact 19 ', and the end of the needle shaft 16 ' protruding from the housing is located within the third insulator 17 '. The improved scheme reduces the production cost by adopting a sectional processing mode for the parts with different diameters of the insulator.
The applicant researches and discovers that the three mutually independent insulators adopted in the improvement scheme are inconvenient to assemble, the third insulator matched with the needle shaft and the contact is inconvenient to assemble, and the third insulator has the falling risk when the needle shaft and the contact perform axial movement, and the stability is poor.
SUMMERY OF THE UTILITY MODEL
In order to make up for the above-mentioned not enough of prior art, the utility model provides a radio frequency test head, its technical scheme as follows.
The radio frequency test head comprises a main body, wherein the main body is axially formed into a cavity structure, the front end and the rear end of the main body are respectively provided with an open connecting end and a test end along the axial direction, the connecting end is used for connecting a coaxial cable, and the test end is used for matching with a tested product; a contact head which is elastically retracted relative to the front end along the axial direction is arranged in the testing end, a through needle channel is arranged along the axial direction of the contact head, and the front end of the contact head is formed into an annular opening which is coaxially aligned with the needle channel; the needle tube is coaxially arranged in the main body, an insulator is tightly matched between the needle tube and the inner wall of the main body, and the front end of the needle tube is axially formed into a hollow accommodating part; a needle shaft which is elastically retracted relative to the front end along the axial direction is arranged in the accommodating part, and the front end of the needle shaft extends to the inner end of the annular opening of the contact head;
the main body comprises a connecting section and a testing section which are formed independently; the connecting end is formed at the rear end of the connecting section, the front end of the connecting section is formed with a connecting sleeve with the caliber wider than that of the connecting section, and an annular step surface is formed at the front end of the connecting section through the connecting sleeve; the rear end of the testing section is screwed in the connecting sleeve, the testing end is formed at the front end of the testing section, and the front end of the testing section is formed with an annular retainer ring which is radially folded;
the insulator comprises a first insulating section and a second insulating section which are independently formed; the first insulating section is filled into the connecting section from the front end of the connecting section, and a convex edge blocked by an annular step surface is formed at the front end of the first insulating section; the second insulating section is filled from the rear end of the testing section, the front end of the second insulating section is blocked by the annular retainer ring, and the rear end of the second insulating section is abutted against the first insulating section so that the convex edge is pressed on the annular step surface; the front end face of the second insulating section is also provided with an insulating sleeve which penetrates through the annular retainer ring forwards along the axis, and the needle shaft is coaxially matched in the insulating sleeve.
Compared with the prior art, the beneficial effects of the utility model reside in that:
(1) the insulator is manufactured in sections, so that the production cost is reduced;
(2) the assembly structure is simple, the insulator has the risk of falling off when the needle shaft and the contact head carry out axial motion, and the stability is good.
The present invention will be further described with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a schematic structural diagram of an rf test head proposed in the prior art.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.
Detailed Description
As shown in fig. 2 to 3: the radio frequency test head comprises a main body 11, wherein the main body 11 is axially formed into a cavity structure, the front end and the rear end of the main body 11 are respectively provided with an open connecting end 111 and a test end 112 along the axial direction, the connecting end 111 is used for connecting a coaxial cable, and the test end 112 is used for matching a tested product; a contact head 19 which is elastically retracted relative to the front end along the axial direction is arranged in the testing end 112, a needle channel 191 which penetrates through the contact head 19 along the axial direction is arranged in the contact head 19, and the front end of the contact head 19 is formed into an annular opening 192 which is coaxially aligned with the needle channel 191; the needle tube 14 is coaxially arranged in the main body 11, an insulator is tightly matched between the needle tube 14 and the inner wall of the main body 11, and the front end of the needle tube 14 is axially formed into a hollow accommodating part 141; a needle shaft 16 which is elastically retracted relative to the front end along the axial direction is arranged in the accommodating part 141, and the front end of the needle shaft 16 extends to the inner end of the annular opening 192 of the contact head 19;
the main body 11 includes a connection section 11a and a test section 11b which are formed separately; the connecting end 111 is formed at the rear end of the connecting section 11a, a connecting sleeve 113 with the caliber wider than that of the connecting section 11a is formed at the front end of the connecting section 11a, and an annular step surface 114 is formed at the front end of the connecting section 11a through the connecting sleeve 113; the rear end of the testing section 11b is screwed in the connecting sleeve 113, the testing end 112 is formed at the front end of the testing section 11b, and the front end of the testing section 11b is formed with an annular retainer ring 115 which is radially folded;
the insulator comprises a first insulating section 12 and a second insulating section 13 which are independently formed; the first insulating section 12 is filled into the connecting section 11a from the front end of the connecting section 11a, and a convex edge 121 blocked by an annular step surface 114 is formed at the front end of the first insulating section 12; the second insulating section 13 is filled from the rear end of the testing section 11b, the front end of the second insulating section 13 is blocked by the annular retainer ring 115, and the rear end of the second insulating section 13 abuts against the first insulating section 12 so that the convex edge 121 is pressed on the annular step surface 114; the front end face of the second insulating section 13 is also formed with an insulating sleeve 131 axially extending forwardly through the annular retainer 115, and the needle shaft 16 is coaxially fitted within the insulating sleeve 131.
By adopting the technical scheme, the insulator of the radio frequency test head is manufactured in a segmented manner, so that the production cost is reduced; in addition, the radio frequency test head has simple assembly structure, and the insulator has the risk of droing when needle shaft, contact head carry out axial motion, and stability is good.
Preferably, the accommodating portion 141 of the needle tube 14 is provided with a first spring 15 disposed axially therein, and the first spring 15 elastically abuts against the rear end of the needle shaft 16 in the axial direction.
Preferably, the testing end 112 houses a second spring 18 axially surrounding the insulating sleeve 131, and the annular collar 115 abuts against the second spring 18 to elastically axially abut against the rear end of the contact 19.
To avoid wear of the insulating sleeve, the test end 112 is provided with a coaxially arranged protective sleeve 17, the protective sleeve 17 being arranged in a cylindrical configuration spaced between the insulating sleeve 131 and the second spring 18. The protective sleeve 17 can also play a role in enhancing the mechanical strength of the insulating sleeve.
For those skilled in the art, the protection scope of the present invention is not limited to the details of the above-described exemplary embodiments, and all the embodiments with variations within the scope and meaning equivalent to the elements of the present invention should be included in the present invention without departing from the spirit or essential characteristics of the present invention.
Claims (4)
1. The radio frequency test head comprises a main body, wherein the main body is axially formed into a cavity structure, the front end and the rear end of the main body are respectively provided with an open connecting end and a test end along the axial direction, the connecting end is used for connecting a coaxial cable, and the test end is used for matching with a tested product; a contact head which is elastically retracted relative to the front end along the axial direction is arranged in the testing end, a through needle channel is arranged along the axial direction of the contact head, and the front end of the contact head is formed into an annular opening which is coaxially aligned with the needle channel; the needle tube is coaxially arranged in the main body, an insulator is tightly matched between the needle tube and the inner wall of the main body, and the front end of the needle tube is axially formed into a hollow accommodating part; a needle shaft which is elastically retracted relative to the front end along the axial direction is arranged in the accommodating part, and the front end of the needle shaft extends to the inner end of the annular opening of the contact head; the method is characterized in that:
the main body comprises a connecting section and a testing section which are formed independently; the connecting end is formed at the rear end of the connecting section, the front end of the connecting section is formed with a connecting sleeve with the caliber wider than that of the connecting section, and an annular step surface is formed at the front end of the connecting section through the connecting sleeve; the rear end of the testing section is screwed in the connecting sleeve, the testing end is formed at the front end of the testing section, and the front end of the testing section is formed with an annular retainer ring which is radially folded;
the insulator comprises a first insulating section and a second insulating section which are independently formed; the first insulating section is filled into the connecting section from the front end of the connecting section, and a convex edge blocked by an annular step surface is formed at the front end of the first insulating section; the second insulating section is filled from the rear end of the testing section, the front end of the second insulating section is blocked by the annular retainer ring, and the rear end of the second insulating section is abutted against the first insulating section so that the convex edge is pressed on the annular step surface; the front end face of the second insulating section is also provided with an insulating sleeve which penetrates through the annular retainer ring forwards along the axis, and the needle shaft is coaxially matched in the insulating sleeve.
2. The radio frequency test head of claim 1, wherein: the containing part of the needle tube is internally provided with a first spring which is arranged in the axial direction, and the first spring elastically pushes against the rear end of the needle shaft along the axial direction.
3. The radio frequency test head of claim 1, wherein: the second spring axially surrounding the insulating sleeve is arranged in the testing end, and the annular retainer ring is abutted against the second spring to elastically abut against the rear end of the contact in the axial direction.
4. The radio frequency test head of claim 3, wherein: the test end is internally provided with a coaxially arranged protective sleeve which is in a cylindrical structure and is arranged between the insulating sleeve and the second spring at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022849176.8U CN213879832U (en) | 2020-12-01 | 2020-12-01 | Radio frequency test head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022849176.8U CN213879832U (en) | 2020-12-01 | 2020-12-01 | Radio frequency test head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213879832U true CN213879832U (en) | 2021-08-03 |
Family
ID=77040973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022849176.8U Active CN213879832U (en) | 2020-12-01 | 2020-12-01 | Radio frequency test head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213879832U (en) |
-
2020
- 2020-12-01 CN CN202022849176.8U patent/CN213879832U/en active Active
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