阅读说明：本技术 一种具有与pcb板柔性接触的高性能同轴连接器 (High-performance coaxial connector in flexible contact with PCB ) 是由 姜攀 曾金荣 黄艳 于 2019-11-20 设计创作，主要内容包括：本发明涉及连接器技术领域,特别涉及一种具有与PCB板柔性接触的高性能同轴连接器,通过在内导体组件的一端上依次连接有弹簧和针头,内导体组件通过针头伸至第一壳体外与外设的PCB板接触使得内导体组件与PCB板电连接,这样能够免焊接或压接,能重复使用,便于后续维护与更换；在同轴连接器与PCB板之间发生松动时,弹簧通过自身的回复力将针头继续往第一壳体外伸,使得同轴连接器与PCB板始终保持电连接,有效地降低了由于接触不良或装接不到位而导致连接器匹配不良的问题,从而提高了配合的可靠性,提高了配合效率。(The invention relates to the technical field of connectors, in particular to a high-performance coaxial connector flexibly contacted with a PCB (printed circuit board). A spring and a needle head are sequentially connected to one end of an inner conductor assembly, and the inner conductor assembly extends out of a first shell through the needle head and is contacted with the external PCB to electrically connect the inner conductor assembly with the PCB, so that welding or crimping can be avoided, the coaxial connector can be repeatedly used, and subsequent maintenance and replacement are facilitated; when the coaxial connector and the PCB are loosened, the spring continues to extend the needle head outwards towards the first shell through the restoring force of the spring, so that the coaxial connector and the PCB are always kept electrically connected, the problem of poor matching of the connector due to poor contact or failure in mounting and connection is effectively reduced, the matching reliability is improved, and the matching efficiency is improved.)

1. The utility model provides a high performance coaxial connector with PCB board flexible contact which characterized in that, includes first casing, the inner chamber of first casing is equipped with inner conductor subassembly, one of inner conductor subassembly serves and has connected gradually spring and syringe needle, inner conductor subassembly passes through the syringe needle extends first casing is outer with the PCB board contact of peripheral hardware makes inner conductor subassembly and PCB board electricity are connected.

2. The high performance coaxial connector with compliant contact to a PCB of claim 1 wherein the distance the needle extends outside the first housing is greater than or equal to the gap between the coaxial connector and the PCB, the spring being in compression when the inner conductor assembly is electrically connected to the PCB.

3. The high performance coaxial connector with compliant contact to a PCB of claim 1 wherein the distance the needle extends outside the first housing is 0.4-1 mm.

4. The high performance coaxial connector with compliant contact to a PCB of claim 1, wherein the inner conductor assembly comprises a first inner conductor and a second inner conductor, the second inner conductor is sleeved on one end of the first inner conductor, the first inner conductor is connected to one end of the spring, the other end of the spring opposite to one end is connected to the needle, and the spring and the needle are both located in the inner cavity of the second inner conductor.

5. The high performance coaxial connector with compliant contact to the PCB of claim 4 further comprising an insulator, wherein the insulator is a circular cylinder, the circular cylinder is sleeved on the outer wall of the first inner conductor and a bottom surface of the circular cylinder is in contact with the second inner conductor.

6. The high-performance coaxial connector flexibly contacting the PCB according to claim 5, wherein the annular cylinder has first annular grooves formed on both bottom surfaces thereof, and the first annular grooves have a groove depth of 0.15-0.2 mm.

7. The high performance coaxial connector with compliant contact to a PCB of claim 4 further comprising a second housing, said second inner conductor located within a second housing inner cavity, said second housing comprising and integrally formed with a first, second and third collar, said second collar located between and in contact with said first and third collar respectively, said third collar having an outer diameter less than an outer diameter of the second collar, said first and second collar outer diameters equal, said first collar inner diameter greater than said second collar inner diameter, said third collar inner diameter equal to the second collar inner diameter.

8. The high performance coaxial connector with compliant contact to a PCB of claim 7, wherein the second inner conductor comprises a fourth collar and a fifth collar and the fourth collar and the fifth collar are integrally formed, wherein the outer diameter of the fourth collar is larger than the outer diameter of the fifth collar, one side of the fourth collar is flush with one side of the first collar, the height difference between the first collar and the fourth collar is 0.15-0.2mm, and the height of the third collar is 0.1-0.15 mm.

9. The high performance coaxial connector with compliant contact to a PCB of claim 4 wherein the first inner conductor is threaded to the second inner conductor.

10. The high performance coaxial connector with compliant contact to a PCB of claim 4 wherein said first inner conductor has a blind hole on a side away from said second inner conductor.

Technical Field

The invention relates to the technical field of connectors, in particular to a high-performance coaxial connector flexibly contacting with a PCB (printed circuit board).

Background

Radio frequency coaxial connectors are widely used for interconnection between circuit boards and radio frequency modules. In the electronic communication industry, miniaturization and low cost are particularly important for market, which promotes higher and higher modularity of electronic communication products. Most of the mainstream products of the connectors in the market at present adopt surface-mounted or perforated welding types, and all the mainstream products need to adopt a welding process, so that the connectors are troublesome. Firstly, an inner conductor of a radio frequency coaxial connector is welded on an inner conductor of a tested PCB in a soldering mode and the like, and the connector is connected with an outer conductor of the PCB in a screw mode and the like.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: a coaxial connector capable of effectively reducing the occurrence of poor connector mating caused by poor contact or missing attachment is provided.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a high performance coaxial connector with PCB board flexible contact, includes first casing, the inner chamber of first casing is equipped with inner conductor subassembly, one of inner conductor subassembly is served and has connected gradually spring and syringe needle, the inner conductor subassembly passes through the syringe needle extends first casing is outer with the PCB board contact of peripheral hardware makes inner conductor subassembly and PCB board electric connection

The invention has the beneficial effects that:

the spring and the needle head are sequentially connected to one end of the inner conductor assembly, and the inner conductor assembly extends out of the first shell through the needle head and is in contact with an external PCB, so that the inner conductor assembly is electrically connected with the PCB, welding or crimping can be avoided, the inner conductor assembly can be repeatedly used, and subsequent maintenance and replacement are facilitated; when the coaxial connector and the PCB are loosened, the spring extends the needle out of the first shell continuously through the restoring force of the spring, so that the coaxial connector and the PCB are always electrically connected, the problem of poor matching of the connector due to poor contact or no attachment is effectively solved, the matching reliability is improved, and the matching efficiency is improved; the floating mechanism consisting of the inner conductor component, the spring and the needle head can prolong the service life of the machine (can meet the requirements of 500000 times of static test and 10000 times of dynamic test); through the coaxial connector of this scheme design, be convenient for realize the connector modularization, the PCB board can realize large-scale use, be convenient for realize that the connector is miniaturized, low dwarfing and the comprehensive properties that the reliability is high and be convenient for realize that the connector is environmental resistance superior, has stronger anti-vibration, impact behavior, satisfies the environmental use requirement.

Drawings

Fig. 1 is a schematic view of a high performance coaxial connector having compliant contact with a PCB board according to the present invention;

FIG. 2 is a schematic diagram of a high performance coaxial connector having compliant contact with a PCB board in accordance with the present invention;

FIG. 3 is a schematic diagram of a high performance coaxial connector having compliant contact with a PCB board in accordance with the present invention;

FIG. 4 is a schematic top view of a high performance coaxial connector having compliant contact with a PCB board in accordance with the present invention;

description of reference numerals:

1. a first housing;

2. a PCB board;

3. a first inner conductor;

4. a second inner conductor; 401. a fourth collar; 402. a fifth collar;

5. a spring;

6. a needle head;

7. an insulator;

8. a second housing; 801. a first collar; 802. a second collar; 803. a third collar.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1, the technical solution provided by the present invention is:

the utility model provides a high performance coaxial connector with PCB board flexible contact, includes first casing, the inner chamber of first casing is equipped with inner conductor subassembly, one of inner conductor subassembly is served and has connected gradually spring and syringe needle, the inner conductor subassembly passes through the syringe needle extends first casing is outer with the PCB board contact of peripheral hardware makes inner conductor subassembly and PCB board electric connection

From the above description, the beneficial effects of the present invention are:

the spring and the needle head are sequentially connected to one end of the inner conductor assembly, and the inner conductor assembly extends out of the first shell through the needle head and is in contact with an external PCB, so that the inner conductor assembly is electrically connected with the PCB, welding or crimping can be avoided, the inner conductor assembly can be repeatedly used, and subsequent maintenance and replacement are facilitated; when the coaxial connector and the PCB are loosened, the spring extends the needle out of the first shell continuously through the restoring force of the spring, so that the coaxial connector and the PCB are always electrically connected, the problem of poor matching of the connector due to poor contact or no attachment is effectively solved, the matching reliability is improved, and the matching efficiency is improved; the floating mechanism consisting of the inner conductor component, the spring and the needle head can prolong the service life of the machine (can meet the requirements of 500000 times of static test and 10000 times of dynamic test); through the coaxial connector of this scheme design, be convenient for realize the connector modularization, the PCB board can realize large-scale use, be convenient for realize that the connector is miniaturized, low dwarfing and the comprehensive properties that the reliability is high and be convenient for realize that the connector is environmental resistance superior, has stronger anti-vibration, impact behavior, satisfies the environmental use requirement.

Further, the distance that the needle head extends out of the first shell is larger than or equal to the gap between the coaxial connector and the PCB, and when the inner conductor assembly is electrically connected with the PCB, the spring is in a compressed state.

Further, the distance from the needle head to the outside of the first shell is 0.4-1 mm.

According to the description, the distance from the needle head to the outside of the first shell is 0.4-1mm, so that the inner conductor assembly can be ensured to be always in contact with and conducted with the central bonding pad of the PCB without influencing the connection, the floating contact of the inner conductor assembly is realized, and the requirement of flexible contact with the PCB is met; and large errors caused by large errors of warpage, flatness and the like of the PCB due to processing can be met.

Further, the inner conductor subassembly includes first inner conductor and second inner conductor, the second inner conductor cover is established the one end of first inner conductor, first inner conductor with the one end of spring is connected, the opposite other end of one end of spring with the syringe needle is connected, spring and syringe needle all are located the second inner conductor inner chamber.

Further, the insulator is an annular cylinder, the annular cylinder is sleeved on the outer wall of the first inner conductor, and a bottom surface of the annular cylinder is in contact with the second inner conductor.

Furthermore, two bottom surfaces of the annular cylinder are respectively provided with a first annular groove, and the depth of each first annular groove is 0.15-0.2 mm.

From the above description, it can be known that the first annular grooves are formed on both bottom surfaces of the cylindrical insulator, which is equivalent to adding an inductor on the insulator to reduce the mismatch of the transmission line caused by the discontinuous capacitance, so that the capacitive discontinuity and the inductive discontinuity play a role in mutual compensation.

Further, still include the second casing, the second inner conductor is located the second casing inner chamber, the second casing includes first lantern ring, second lantern ring and third lantern ring just first lantern ring, second lantern ring and third lantern ring integrated into one piece, the second lantern ring is located between first lantern ring and the third lantern ring and respectively with first lantern ring and third lantern ring contact, the external diameter of third lantern ring is less than the external diameter of second lantern ring, the external diameter of first lantern ring and the external diameter of second lantern ring are equal, the internal diameter of first lantern ring is greater than the internal diameter of second lantern ring, the internal diameter of third lantern ring and the internal diameter of second lantern ring are equal.

Further, the second inner conductor comprises a fourth lantern ring and a fifth lantern ring which are integrally formed, the outer diameter of the fourth lantern ring is larger than the outer diameter of the fifth lantern ring, one side face of the fourth lantern ring is flush with one side face of the first lantern ring, the height difference between the first lantern ring and the fourth lantern ring is 0.15-0.2mm, and the height of the third lantern ring is 0.1-0.15 mm.

From the above description, the height difference between the first lantern ring and the fourth lantern ring is 0.15-0.2mm, the height of the third lantern ring is 0.1-0.15mm, and the offset compensation is performed at the coaxial variable cross section, so that the coaxial connector can be used in millimeter wave band, and the high-performance and high-frequency use requirement is met.

Further, the first inner conductor and the second inner conductor are connected through threads.

From the above description, it can be known that the first inner conductor and the second inner conductor are connected through the screw thread, so that the inner conductor assembly is prevented from rotating and displacing in the first shell, and the performance reliability of the product is ensured.

Furthermore, a blind hole is formed in one side face, far away from the second inner conductor, of the first inner conductor.

Referring to fig. 1 to 4, a first embodiment of the present invention is:

referring to fig. 1, 2 and 4, a high performance coaxial connector flexibly contacting a PCB includes a first housing 1, an inner conductor assembly is disposed in an inner cavity of the first housing 1, a spring 5 and a needle 6 are sequentially connected to one end of the inner conductor assembly, and the inner conductor assembly extends out of the first housing 1 through the needle 6 and contacts the PCB 2, so that the inner conductor assembly is electrically connected to the PCB 2.

The distance that the needle 6 extends to outside the first shell 1 is greater than or equal to the clearance between the coaxial connector and the PCB board 2, when the inner conductor assembly is electrically connected with the PCB board 2, the spring 5 is in a compressed state.

The pad conductor intercommunication of syringe needle 6 and PCB board 2, because when first casing 1 and PCB board 2 lock, when syringe needle 6 receives axial pressure extrusion, to 5 directions of spring removal, 5 compression deformation of spring, syringe needle 6 respectively with first inner conductor 3 and 4 in close contact with of second inner conductor, through threaded connection between the outer conductor of first casing 1 and PCB board 2, plug and connecting seat pass through screw thread locking, have guaranteed electrical signal's normal transmission.

The needle 6 extends outside the first housing 1 by a distance (indicated by the letter a in fig. 3) of 0.4-1mm, preferably 0.85 mm.

The inner conductor subassembly includes first inner conductor 3 and second inner conductor 4, the second inner conductor 4 cover is established the one end of first inner conductor 3, first inner conductor 3 with the one end of spring 5 is connected, the other end that the one end of spring 5 is relative with syringe needle 6 is connected, spring 5 and syringe needle 6 all are located the 4 inner chambers of second inner conductor.

Still include insulator 7, insulator 7 is cyclic annular cylinder, cyclic annular cylinder cover is established on the 3 outer walls of first inner conductor just a bottom surface of cyclic annular cylinder with the contact of second inner conductor 4.

First annular grooves are formed in the two bottom surfaces of the annular cylinder, and the groove depth (indicated by a letter B in figure 3) of each first annular groove is 0.15-0.2mm, preferably 0.15 mm.

The inner conductor 4 is positioned in the inner cavity of the second shell 8, the second shell 8 comprises a first collar 801, a second collar 802 and a third collar 803, the first collar 801, the second collar 802 and the third collar 803 are integrally formed, the second collar 802 is positioned between the first collar 801 and the third collar 803 and is respectively contacted with the first collar 801 and the third collar 803, the outer diameter of the third collar 803 is smaller than that of the second collar 802, the outer diameters of the first collar 801 and the second collar 802 are equal, the inner diameter of the first collar 801 is larger than that of the second collar 802, and the inner diameter of the third collar 803 and that of the second collar 802 are equal.

The second inner conductor 4 comprises a fourth loop 401 and a fifth loop 402, the fourth loop 401 and the fifth loop 402 are integrally formed, the outer diameter of the fourth loop 401 is larger than the outer diameter of the fifth loop 402, one side surface of the fourth loop 401 is flush with one side surface of the first loop 801, the height difference (indicated by letter C in fig. 3) between the first loop 801 and the fourth loop 401 is 0.15-0.2mm, preferably 0.2mm, and the height of the third loop 803 is 0.1-0.15mm (indicated by letter D in fig. 3), preferably 0.1 mm.

When the coaxial connector is connected with the PCB 2, the insulator 7 is sleeved on the first inner conductor 3, the spring 5 and the needle 6 are sequentially installed in the second inner conductor 4, the first inner conductor 3 is connected with the second inner conductor 4 through threads, the insulator 7 is guaranteed not to axially shift and radially rotate on the first inner conductor 3, the inner conductor component is safely and reliably fixed on the inner conductor part, then the inner conductor component is installed in the first shell 1, the second shell 8 is pressed into the first shell 1, the inner conductor component is guaranteed not to rotate and move in the first shell 1, and the performance reliability of a product is guaranteed.

And a blind hole is formed in one side surface of the first inner conductor 3, which is far away from the second inner conductor 4.

The spring 5 is formed by winding a stainless steel wire.

The insulator 7 is made of PEI plastic by machining and turning.

The design principle of the coaxial connector designed by the scheme is as follows:

since the characteristic impedance should be equal to 50 Ω in the medium region, which is the nominal value Z0. According to impedance formula (1)

Wherein: z0-characteristic impedance, 50 Ω

ε r-relative permittivity of a Medium

D-inner diameter of outer conductor

d-outer diameter of inner conductor

The upper limit cut-off frequency of the coaxial connector mainly depends on the inner diameter size of the outer conductor of the connector, the outer diameter size of the inner conductor and the relative dielectric constant of the medium, and is shown in a formula (2).

Wherein: fc-upper cut-off frequency

Epsilon-relative dielectric constant of the medium

D-inner diameter of outer conductor

d-outer diameter of inner conductor

The upper cut-off frequency fc ≈ 46 GHz.

Due to the introduction of the insulator 7, a discontinuous capacitor is introduced between the air transmission line and the dielectric transmission line, in order to reduce the transmission line mismatch caused by the discontinuous capacitor, coplanar compensation is usually performed at the contact surface, and a part of the insulator 7 is excavated (indicated by a letter B in fig. 3), which is equivalent to adding an inductor to the part of the insulator 7; capacitive and inductive discontinuities act as mutual compensation, and misalignment compensation is performed at the coaxial variable cross section (at letters C and D in figure 3), so that the connector can be used in millimeter wave bands, and the high-performance and high-frequency use requirement is met.

In summary, according to the high-performance coaxial connector flexibly contacting with the PCB provided by the invention, the spring and the needle head are sequentially connected to one end of the inner conductor assembly, and the inner conductor assembly extends out of the first housing through the needle head and contacts with the external PCB to electrically connect the inner conductor assembly with the PCB, so that welding or crimping is avoided, the coaxial connector can be repeatedly used, and subsequent maintenance and replacement are facilitated; when the coaxial connector and the PCB are loosened, the spring extends the needle out of the first shell continuously through the restoring force of the spring, so that the coaxial connector and the PCB are always electrically connected, the problem of poor matching of the connector due to poor contact or no attachment is effectively solved, the matching reliability is improved, and the matching efficiency is improved; the floating mechanism consisting of the inner conductor component, the spring and the needle head can prolong the service life of the machine (can meet the requirements of 500000 times of static test and 10000 times of dynamic test); through the coaxial connector of this scheme design, be convenient for realize the connector modularization, the PCB board can realize large-scale use, be convenient for realize that the connector is miniaturized, low dwarfing and the comprehensive properties that the reliability is high and be convenient for realize that the connector is environmental resistance superior, has stronger anti-vibration, impact behavior, satisfies the environmental use requirement.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.