CN211376977U - PIN needle, inner conductor, plug connector and radio frequency coaxial connector - Google Patents

Abstract

The utility model discloses a PIN needle, an inner conductor, a connector and a radio frequency coaxial connector, wherein the outer diameter of the end of the PIN needle is larger than that of the end of the PIN needle; the inner conductor comprises a signal transmission body and a PIN needle which are arranged along the axial direction, and the PIN needle is the PIN needle disclosed by the disclosure. A plug connector comprises an outer conductor, an inner conductor and an insulator, wherein the inner conductor is the inner conductor disclosed by the disclosure. A radio frequency coaxial connector comprises a plug connector and an adapter, wherein the plug connector is the plug connector disclosed by the disclosure. The utility model discloses a radio frequency coaxial connector has the characteristics of big tolerance, high-power and high performance, simple structure, the dependable performance.

Description

PIN needle, inner conductor, plug connector and radio frequency coaxial connector

Technical Field

The utility model belongs to the radio frequency connector field specifically is a PIN needle, inner conductor, connector and radio frequency coaxial connector.

Background

The radio frequency connector is widely applied to a signal transmission network and plays a role in electrical connection and separation of transmission lines.

In the prior art, coaxial connectors for various panels and circuit boards are disclosed, and generally comprise an upper connector and a lower connector, which are connected through an adapter. The problem is that these connectors generally have a complicated structure and insufficient tolerance compensation capability.

Fig. 1, a, shows an ideal centering operation of a conventional board-to-board interconnection scheme, in which two sockets of a 1.1 left-end connector and a 1.3 right-end connector are respectively mounted on two side substrates and connected by an intermediate adapter 1.2.

The diagram b in fig. 1 is the deviation operating state of fig. a, due to the installation deviation Δ d1 existing between the 1.1 left end connector and the 1.3 right end connector, the adaptor 1.2 is in the deviation operating state when the left end connector and the 1.3 right end connector at two ends are connected, and the relative deflection angle α 1 of the centers of the 1.1 left end connector and the 1.3 right end connector is the maximum operating capacity of this structure. As Δ d1 and α 1 continue to increase, the force applied to the interference point 1.4 increases and the stability of the whole system and the reliability of the contact are reduced.

Likewise, the interference point 1.5 of the left-end connector outer conductor 1.1.2 and the adaptor outer conductor 1.2.2 generates a larger stress concentration due to the increase of Δ d1, thereby reducing the reliability of the whole system. The switching inner conductor 1.2.1 and two cylindrical pins of the left end connector inner conductor 1.1.1 and the right end connector inner conductor 1.3.1 form point-line type contact, and the contact area is limited.

Disclosure of Invention

In view of the above, it is a first object of the present invention to provide a PIN, which has a larger outer diameter at the head end than at the tail end, and a stable transmission is achieved while the connection length is extended.

A second object of the utility model is to provide an inner conductor, this inner conductor installs the PIN needle of this disclosure.

A third object of the present invention is to provide a connector, which comprises an outer conductor, an inner conductor and an insulator, wherein the inner conductor is the inner conductor of the present disclosure.

The fourth object of the utility model is to provide a radio frequency coaxial connector, this connector install the plug connector of this disclosure, have the characteristics of big tolerance, high-power and high performance, simple structure, the dependable performance.

In order to achieve the above object, the utility model discloses the technical scheme who takes includes:

in keeping with the first object of the present disclosure, a PIN needle having a tip end with an outer diameter greater than an outer diameter of a tail end.

Optionally, the outer diameter of the needle end or proximal needle end tapers to the needle tail end.

Optionally, the needle tail region, the signal transmission region, the interference region and the needle head region are sequentially arranged along the axial direction, and the signal transmission region is of a cone frustum-shaped structure.

Optionally, the needle tail area and the interference area are both cylindrical structures, and the cross section of the needle head area is an arc-shaped surface, a slope surface or a combined surface of the arc-shaped surface and the slope surface.

According to a second object of the present disclosure, an inner conductor includes a transmission connector and a PIN axially disposed, the PIN being a PIN according to the present disclosure.

In accordance with a third object of the present disclosure, a connector includes an outer conductor, an inner conductor and an insulator, the inner conductor being the inner conductor of the present disclosure.

According to the fourth purpose of this disclosure, a radio frequency coaxial connector, including connector and adapter, the connector be the connector of this disclosure, the adapter include adapter inner conductor, adapter insulator and the adapter outer conductor of coaxial setting in proper order from inside to outside, the adapter insulator realize the insulating isolation support of adapter inner conductor and adapter outer conductor in the tip, the adapter insulator be bushing structure, the wall body that sets up air cavity and/or bushing structure on bushing structure's the wall body is embedded establishes the air cavity.

Optionally, at least one end of the sleeve structure is provided with a ring end which is closed along the circumferential direction; the air cavity arranged on the wall body of the sleeve structure is a structure formed by arranging axial openings and/or radial openings on the wall body of the sleeve structure.

Optionally, the adaptor outer conductor is a tubular member, and a protruding hollow part far away from the axis is arranged at the end part of the tubular member).

Optionally, the adaptor outer conductor is a tubular member, and the inner diameter phid of the adaptor outer conductor is larger than the outer diameter phic of the adaptor insulator. The inner conductor of the adapter comprises an adapter rod, the end part of the adapter rod is sequentially provided with a limiting table and an adapter, the outer diameter of the limiting table is larger than that of the adapter rod, and the outer diameter of the limiting table is larger than that of the adapter; the inner diameter phi A of the top end of the adapter is larger than the inner diameter phi B of the opening end of the adapter, and phi A-phi B/2 is 0.1-0.15 mm.

Compared with the prior art, the utility model discloses a head end external diameter of this PIN needle is bigger than the external diameter of tail end, when extension connection length, has stable transmission.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of a prior art RF connector;

in fig. 1, the reference numerals denote: 1.1 left end connector, 1.2 adapter, 1.3 right end connector, 1.4 inner conductor interference point, 1.5 outer conductor interference point, 1.1.1 left end connector inner conductor, 1.1.2 left end connector outer conductor, 1.2.1 adapter inner conductor, 1.2.2 adapter outer conductor, 1.3.1 right end connector inner conductor; Δ d1 is the mounting radial deviation of 1.1 from 1.3; α 1 is a deflection angle of 1.2;

fig. 2 is a schematic view of the structure of the inner conductor of the present invention;

fig. 3 is a schematic structural diagram of the adapter of the present invention;

FIG. 4 is a schematic view of the adapter insulator structure of FIG. 2;

fig. 5 is a schematic structural diagram of the rf coaxial connector of the present invention;

FIG. 6 is a schematic view of the axially deformed configuration of FIG. 5;

FIG. 7 is a schematic view of the radial deformation configuration of FIG. 5;

the reference numerals in the figures denote: 1-adapter, 11-adapter outer conductor, 11-1 raised hollow platform, 12-adapter inner conductor, 12-1 limit platform, 12-2 adapter, 13-adapter insulator, 2-first plug-in body, 21-first outer conductor, 22-first inner conductor, 221-transmission connector, 2211-connection cavity, 2212-welding position, 222-PIN needle, 2221-PIN tail area, 2222-signal transmission area, 2223-interference area, 2224-PIN head area, 23-first insulator, 3-second plug-in body, 31-second outer conductor, 32-second inner conductor and 33-second insulator;

the inner diameter of the top end of the phi A adapter, the inner diameter of the port end of the phi B adapter, the outer diameter of an insulator of the phi C adapter and the inner diameter of an outer conductor of the phi D adapter; e, inserting depth of the second inner conductor and inserting depth of the first inner conductor;

g-a first high impedance region, H-a first low impedance region, I-a second high impedance region, J-a second low impedance region;

g 1-first interference point, g 2-second interference point.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings, which are provided for purposes of illustration and not limitation. In the present disclosure, unless otherwise specified, use of the directional terms "upper" and "lower" generally refer to the definition in the drawing figures of the accompanying drawings, and "inner" and "outer" refer to the inner and outer of the contours of the corresponding parts.

PIN PINs are a metallic substance used in connectors to complete the conduction (transmission) of electricity (signals). The needle head end mentioned in the present disclosure refers to the end portion that the PIN needle contacts first when being inserted into the signal transmission hole, and similarly, the other end of the PIN needle is the needle tail end. The utility model discloses a PIN needle 222, the external diameter of needle head end is greater than the external diameter of needle tail end. When the hole (generally having a radial elastic split structure) matched with the PIN PIN 222 tightly embraces the axis to displace, not only can stable signal transmission be ensured and the displacement length be increased, but also increased holding force is provided at the end part to prevent accidental disconnection; meanwhile, the outer diameter of the needle head end is larger than that of the needle tail end, and the formation of needle head end interference points is reduced.

In the embodiment of the disclosure, the outer diameter of the needle head end or the near needle head end to the needle tail end is gradually reduced, the structure is similar to a cone frustum, the outer diameter is gradually increased, the change in mutual movement cannot be increased sharply, the buffering degree is large, and the formation of interference points at the needle head end is reduced.

In the embodiment of the present disclosure, the needle tail section 2221, the signal transmission section 2222, the interference section 2223, and the needle head section 2224 are sequentially arranged along the axial direction, and the signal transmission section 2222 has a truncated cone-shaped structure. The processing technology is simple, and meanwhile, the formation of interference points of the interference area 2223 is reduced.

In the embodiment of the present disclosure, the needle tail section 2221 and the interference section 2223 have a cylindrical structure, and the cross section of the needle head section 2224 has an arc-shaped surface, a slope surface, or a combination of the arc-shaped surface and the slope surface. The formation of interference points in the interference zone 2223 is reduced while the shape of the tip zone 2224 does not affect the transmission performance.

In an embodiment of the present disclosure, an inner conductor includes a signal transmission body 221 and a PIN 222 arranged in an axial direction, and the PIN 222 is a PIN of the present disclosure. The signal transmission body 221 is used for connecting other signal transmission members, and may be provided with a connection cavity 2211, and a welding position 2212 is arranged in the radial direction of the connection cavity, so as to facilitate welding and fixing operations; for example, as shown in fig. 4-5, the first inner conductor 22 is a pin structure, and the outer diameter of the first inner conductor 22 decreases from the proximal portion to the root portion. The first plug-in connector 2 is a large inclined plane socket end, the first inner conductor 22 is in an inverted cone structure, the outer diameter of the adapter 12-2 is enabled to show a positive change along with different matching heights, when the matching height is the minimum, the outer diameter of the adapter 12-2 is reduced, and the lower low resistance of the first low impedance area H is relieved; when the maximum matching height is reached, the outer diameter of the adapter 12-2 becomes larger to increase the low resistance of the first low impedance region H, so as to match the first high impedance region G.

In accordance with a third object of the present disclosure, a connector includes an outer conductor, an inner conductor, and an insulator, the inner conductor being the inner conductor of the present disclosure.

A radio frequency coaxial connector comprises a first plug-in body 2, an adapter 1 and a second plug-in body 3 which are electrically connected in sequence, wherein the adapter 1 is the adapter 1 disclosed by the disclosure. With reference to fig. 2-7, the adaptor 1 of the present invention includes an adaptor inner conductor 12, an adaptor insulator 13 and an adaptor outer conductor 11 coaxially disposed from inside to outside in sequence, the adaptor insulator 13 realizes the insulation and isolation support of the adaptor inner conductor 12 and the adaptor outer conductor 11 at the end, the adaptor insulator 13 is a sleeve structure, the wall body of the sleeve structure is provided with an air cavity, the air cavity mentioned here means that a cavity is embedded in the wall body of the sleeve structure, and the shape of the cavity can be prepared into cavities in the shapes of a spherical cavity, a quadrilateral cavity, etc. according to the requirements of actual use or processing technology; or a notch is directly arranged on the sleeve structure to form an air cavity, and the air cavity is communicated with the outer conductor of the adapter and/or the air cavity is communicated with the inner conductor of the adapter. The adapter 1 is designed to be of a symmetrical structure at two ends, and the direction does not need to be distinguished when the whole adapter is assembled. The inner conductor 12 of the adapter is designed to be a structure with thick two ends and thin middle, so that low impedance areas are formed at the two ends, a high impedance area is formed in the middle, and the high impedance area and the low impedance area can form impedance complementation, so that the radio frequency performance of a product is improved. The adapter insulator 13 provides an insulating and isolating support of the adapter inner conductor 12 and the adapter outer conductor 11 at the ends, increasing the impedance of the intermediate section of the adapter 1.

In the embodiment of the disclosure, the air cavity is a structure formed by arranging an axial opening and/or a radial opening on the wall body of the sleeve structure, an air layer is formed, the impedance is prevented from being too low, and the impedance can be balanced by controlling the size of the air cavity according to the actual use requirement; for example, the sleeve structure is provided with a circumferentially closed loop end at least at one end; the air chamber is formed by providing axial and/or radial openings in the wall of the bushing structure, as shown in fig. 4, and the adapter insulator 13' is designed to prevent the impedance from being too low by mixing air through the cross-section of the "earth" shape, the bottom surface of the "cross" shape, or other shapes. In particular, in different embodiments of the adapter insulator 13, one or both end faces are of solid construction.

In the embodiment of the present disclosure, the adaptor outer conductor 11 is a tubular member, and a convex hollow boss 11-1 away from the axial center is provided at the end of the tubular member. A certain air ring cavity is also formed between the convex hollow platform 11-1 and the adapter insulator 13, so that the impedance is further improved; meanwhile, at least one end of the sleeve structure is provided with a ring end which is closed along the circumferential direction, the adaptor insulator at the air ring cavity can fill a certain air ring cavity to further balance the impedance (mainly improve the impedance) at the air ring cavity, and meanwhile, the raised hollow platform 11-1 is preferably a straight-edge annular platform, so that the interference influence between the insulator with a section of a right-angle edge and the straight-edge annular platform is small while enough contact surface with the plug-in connector is ensured.

In an embodiment of the present disclosure, the adaptor outer conductor 11 is a tubular member with an adaptor outer conductor inner diameter phid greater than an adaptor insulator outer diameter phic. A gap (phi D-phi C) is formed between the adapter insulator 13 and the adapter outer conductor 11, and the change value of the gap is 0-0.15 mm in the working process. The phid region is supported by the phic region to prevent over-deformation of the phid region toward the adaptor inner conductor 12.

In the embodiment of the disclosure, the adaptor inner conductor 12 comprises an adaptor rod, the end part of the adaptor rod is sequentially provided with a limiting table 12-1 and an adaptor 12-2, the outer diameter of the limiting table 12-1 is larger than that of the adaptor rod, and the outer diameter of the limiting table 12-1 is larger than that of the adaptor 12-2; the limiting table 12-1 is arranged to facilitate the fixing of the adapter insulator 13 and facilitate the machining.

The inner diameter phi A of the top end of the adapter is larger than the inner diameter phi B of the opening end of the adapter, and the best is phi A-phi B/2 which is 0.1-0.15 mm. The adapter tip internal diameter of the design of the present disclosure is greater than the adapter mouth internal diameter, reducing the point contact of the head of the first inner conductor 22 (or second inner conductor 32) with the inner wall of the bore of the adapter 12-2. Meanwhile, the inner diameter of the jacks of the inner conductors at the two ends of the adapter is far larger than the outer diameter of the first inner conductor 22 (or the second inner conductor 32) in design, so that the mechanical interference between pins of the first plug connector 2 and the second plug connector 3 and the jacks of the adapter when the first plug connector and the second plug connector are plugged under the condition of non-aligned axes is avoided, larger axial and radial offset can be allowed, and the electrical performance is superior under the offset.

In an embodiment of the present disclosure, the first socket 2 includes a first inner conductor 22, a first insulator 23, and a first outer conductor 21, and the second socket 3 includes a second inner conductor 32, a second insulator 33, and a second outer conductor 31, and the second inner conductor insertion depth E is less than or equal to the first inner conductor insertion depth F. The second inner conductor plugging depth E is equivalent to or within +/-5% of the first inner conductor plugging depth F, when the adapter is in the maximum working state, the adapter 1 moves between the fixed first plugging body 2 and the fixed second plugging body 3 and always keeps electric connection, and the adapter 2 has no directivity when in working.

In the embodiment of the present disclosure, a first high impedance region G is formed when the adaptor 1 and the first plug 2 relatively move to the maximum displacement point, and the adaptor 1 is sequentially a first low impedance region H, a second high impedance region I and a second low impedance region J from one end to the other end; the first high-impedance region G and the first low-impedance region H realize impedance balance, the second high-impedance region I and the second low-impedance region J realize impedance balance, and high-low matching is carried out to achieve excellent electrical performance. When the inner conductor of the connector is contacted with the adapter 12-2, the mouth part of the inner conductor is contacted in a whole circle, the transmission area is larger than that of the common point lever type contact, and the power capacity is improved. The first interference point g1 and the second interference point g2 have no interference and are much smaller than the lever contact fatigue stress limit of the common structure. In the insertion process, the common structure has very large radial and axial resistance because of the existence of interference points, and the abrupt change of hard contact force is also very large, so that the hand feeling is poor. The structure disclosed by the invention has no interference, so that the power is soft and the inserting hand feeling is good. The structure has better dynamic intermodulation performance than the common structure because of the absence of lever-type unstable contact between the first interference point g1 and the second interference point g 2.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of the various embodiments of the present disclosure can be made, and the same should be considered as the inventive content of the present disclosure, as long as the combination does not depart from the spirit of the present disclosure.

Claims (10)

1. A PIN needle is characterized in that the outer diameter of the needle head end is larger than that of the needle tail end.

2. The PIN needle of claim 1 wherein the outside diameter tapers from the needle end or proximal needle end to the needle end.

3. PIN according to claim 1 or 2, characterized in that the tail section (2221), the signal transmission section (2222), the interference section (2223) and the tip section (2224) are arranged in the axial direction in this order, the signal transmission section (2222) having a truncated cone shape.

4. The PIN needle according to claim 3, wherein the needle tail region (2221) and the interference region (2223) are both cylindrical structures, and the cross section of the needle head region (2224) is an arc surface, a slope surface or a combination surface of the arc surface and the slope surface.

5. An inner conductor, characterized in that it comprises a transmission connector (221) and a PIN arranged along the axial direction, wherein the PIN is the PIN according to any one of claims 1-4.

6. A connector comprising an outer conductor, an inner conductor and an insulator, wherein the inner conductor is the inner conductor of claim 5.

7. A radio frequency coaxial connector, includes connector and adapter, the connector be the connector of claim 6, adapter (1) include adapter inner conductor (12), adapter insulator (13) and adapter outer conductor (11) of coaxial setting in proper order from inside to outside, characterized in that, adapter insulator (13) realize the insulating isolation support of adapter inner conductor (12) and adapter outer conductor (11) in the tip, adapter insulator (13) be bushing structure, the wall body that sets up air cavity and/or bushing structure on bushing structure sets up the air cavity in the wall body embedding.

8. The rf coaxial connector of claim 7, wherein the sleeve structure has a circumferentially closed loop end at least at one end; the air cavity arranged on the wall body of the sleeve structure is a structure formed by arranging axial openings and/or radial openings on the wall body of the sleeve structure.

9. The rf coaxial connector according to claim 7, wherein the adaptor outer conductor (11) is a tubular member and a raised hollow boss (11-1) is provided at an end of the tubular member away from the axial center.

10. The rf coaxial connector of claim 7, wherein the adaptor outer conductor (11) is a tubular member having an adaptor outer conductor inner diameter (phid) greater than an adaptor insulator outer diameter (phic);

the inner conductor (12) of the adapter comprises an adapter rod, the end part of the adapter rod is sequentially provided with a limiting table (12-1) and an adapter (12-2), the outer diameter of the limiting table (12-1) is larger than that of the adapter rod, and the outer diameter of the limiting table (12-1) is larger than that of the adapter (12-2);

the inner diameter (phi A) of the top end of the adapter is larger than the inner diameter (phi B) of the opening end of the adapter, and phi A-phi B/2 is 0.1-0.15 mm.

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