CN215266992U

CN215266992U - SMA type adapter

Info

Publication number: CN215266992U
Application number: CN202121656180.0U
Authority: CN
Inventors: 周帅帅; 熊东
Original assignee: Shanghai Juncoax Rf Technologies Co ltd
Current assignee: Shanghai Juncoax Rf Technologies Co ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2021-12-21
Anticipated expiration: 2031-07-20

Abstract

The utility model discloses an SMA type adapter, the performance of the components is improved through a close fit mode, the SMA type adapter has the characteristics of simple and efficient assembly and excellent electrical performance, which comprises a hollow shell member, wherein a first SMA type port and a second SMA type port are respectively arranged at the two axial ends of the shell member, a first insulator is arranged in the first SMA type port in a tight fit manner, a second insulator is arranged in the second SMA type port in a tight fit manner, the first insulator and the second insulator are coaxially arranged with the shell part, the opposite end surfaces of the first insulator and the second insulator are respectively provided with a coplanar compensation structure, the shell component is also coaxially provided with a jack component, two axial ends of the jack component are respectively provided with jacks, and the two axial ends of the jack piece are respectively and tightly matched and plugged in the inner holes of the first insulator and the second insulator.

Description

SMA type adapter

Technical Field

The utility model relates to a coaxial adapter field of radio frequency, concretely relates to SMA type adapter.

Background

The SMA type adaptor is a subminiature rf coaxial cable adaptor, known as the source Sub-MiniatureA connector, commonly used to transmit rf signals. It has the advantages of wide frequency band, good reliability, low standing wave ratio and low loss. The radio frequency adapter is an essential product for measuring instruments and connecting cables with different interfaces, and the radio frequency coaxial adapter can be generally divided into 3 grades of metering grade, testing grade and production grade. The best performance at the metering level, the longest service life and the highest cost. General use as calibration standards, performance verification standards and some applications for precision connections! Such as a network analyzer standard adapter. The test stage is mainly used for component testing and the like, and can provide better testing performance and smaller tolerance. The microwave heating device is used in production level and is widely used in electronic equipment and various microwave elements. It has relatively poor performance, short service life and low cost. It can be seen from the above that there are large differences in mechanical and electrical performance between different grades of adapters.

With the increasingly strict requirements of users on the performance of test products, the improvement of the performance of the products is very important. The adapter in the prior art is shown in fig. 1, and the structure is formed by fixing three parts, namely the insulator, the jack piece and the shell in a dispensing mode.

However, this structure has the following disadvantages:

1. the dispensing and encapsulating process is complicated in technology, and air is exhausted before a solid medium is not cured and filled around an inner conductor and an outer conductor of the radio frequency coaxial adapter to achieve the effects of fixing and improving the electric strength. The process has higher requirements on the operation and proficiency of workers, and if the glue filling amount is not controlled well and the curing is not uniform enough, axial deviation of jacks and insulating media can be caused, so that the performance and the connection reliability of products are influenced.

2. The dispensing process needs to pre-punch holes at the same positions of the three parts, signal leakage can occur at the punched positions, and the design requirement of low loss cannot be met. And because the impedance at the glue pouring position changes, the frequency is reduced, the frequency range can only reach 6GHz, and the use requirement of higher frequency cannot be met naturally.

Disclosure of Invention

In order to solve the problem in the prior art, the utility model provides a SMA type adapter, spare part have realized the promotion of performance through the close-fitting mode, have the simple high efficiency of assembly, characteristics that electrical property is outstanding.

In order to realize the above purpose, the utility model discloses the technical scheme who adopts does: the shell comprises a hollow shell body, wherein a first SMA type port and a second SMA type port are respectively arranged at two axial ends of the shell body, a first insulator is arranged in the first SMA type port in a tight fit mode, a second insulator is arranged in the second SMA type port in a tight fit mode, the first insulator and the second insulator are coaxially arranged with the shell body, the opposite end faces of the first insulator and the second insulator are respectively provided with a coplanar compensation structure, a jack piece is coaxially arranged in the shell body, two axial ends of the jack piece are respectively provided with jacks, and two axial ends of the jack piece are respectively and tightly matched and plugged in inner holes of the first insulator and the second insulator.

Further, inner step surfaces are arranged in the first SMA type port and the second SMA type port, and opposite end faces of the first insulator and the second insulator are respectively abutted to the corresponding inner step surfaces.

Further, first SMA type port with the inner wall of second SMA type port all is provided with the casing barb, first insulator with the outer wall of second insulator respectively with correspond the cooperation of casing barb joint.

Further, the first insulator with the outer wall of second insulator all is provided with the casing barb, first SMA type port with the inner wall of second SMA type port respectively with correspond the cooperation of casing barb joint.

Furthermore, the jack piece comprises a first section, a second section and a third section which are sequentially arranged along the axial direction, the first section and the third section are respectively provided with the jack, and the first section and the third section are respectively inserted into inner holes of the first insulator and the second insulator in a tight fit manner.

Furthermore, the diameter of the second section is larger than the diameters of the first section and the third section, step surfaces are formed at two axial ends of the second section, and opposite end surfaces of the first insulator and the second insulator are respectively abutted against the corresponding step surfaces.

Furthermore, the opposite end surfaces of the first insulator and the second insulator are provided with grooves, and the grooves form the coplanar compensation structure.

Further, the groove is an annular groove.

Further, the outer periphery of the housing member is provided with a flange.

Further, the flange is evenly provided with a plurality of flange holes along circumference.

Compared with the prior art, the utility model is formed by assembling four necessary parts, namely the first insulator and the second insulator are coaxially and tightly matched with the shell part, and the axial two ends of the jack part are respectively spliced and tightly matched with the first insulator and the second insulator, so that the assembly is simple and efficient; and the relative terminal surface of first insulator and second insulator all is provided with coplane compensation structure, adopts coplane compensation in the place of impedance sudden change, has improved the utility model discloses an electrical property and frequency of use, equipment testing result satisfy 18 GHz's designing requirement, satisfy customer's demand. The utility model discloses the structure has abandoned complicated encapsulating technology, and the tight fit mode through spare part has realized the promotion of performance, has the simple high efficiency of assembly, and the outstanding characteristics of electrical performance under the circumstances of guaranteeing low cost, can guarantee that electrical parameter accords with the customer requirement, again can large batch assembly output, and this structure is suitable for in industry wide use.

Furthermore, the opposite end faces of the first insulator and the second insulator are respectively in close contact fit with the inner step faces inside the first SMA type port and the second SMA type port, and meanwhile the opposite end faces of the first insulator and the second insulator are respectively in close contact with the step faces at the two ends of the jack piece, so that fixed positioning is realized by utilizing a step structure, close fit axial fixation of the jack piece, the insulators and the shell piece is realized, and the consistency of products is ensured.

Furthermore, the first insulator, the second insulator and the shell are clamped through the shell barbs, the barb fixed installation mode is adopted, connection between the insulator and the shell is reliable and stable, the insulator can be effectively prevented from transversely deviating, and the consistency of products is guaranteed.

Drawings

FIG. 1 is a schematic view of a prior art adapter;

fig. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3a is a first schematic structural diagram of a housing member according to an embodiment of the present invention; FIG. 3b is a schematic structural diagram of a housing part according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an insulator according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a jack according to an embodiment of the present invention;

the shell comprises a shell body 1, a shell body barb 11, a first SMA type port 12, a second SMA type port 13, a flange 14, a first insulator 2A, a second insulator 2B, a coplanar compensation structure 21 and a jack body 3.

Detailed Description

The present invention will be further explained with reference to the drawings and specific examples, which are illustrated in the attached drawings, and it is to be understood that the described examples are only a part of the present application and not all of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the utility model provides a SMA type adapter, specifically refer to fig. 2, fig. 3a, fig. 3B, fig. 4 and fig. 5, it includes the shell piece 1 of cavity form, the axial both ends of shell piece 1 are provided with first SMA type port 12 and second SMA type port 13 respectively, tight fit is provided with first insulator 2A in the first SMA type port 12, tight fit is provided with second insulator 2B in the second SMA type port 13, and first insulator 2A and second insulator 2B and the coaxial setting of shell piece 1, the relative terminal surface of first insulator 2A and second insulator 2B all is provided with coplane compensation structure 21, still coaxial jack piece 3 that is provided with in shell piece 1, the axial both ends of jack piece 3 are provided with the jack respectively, the axial both ends of jack piece 3 are close-fit respectively and peg graft in first insulator 2A and second insulator 2B's hole.

In the embodiment, four necessary parts are assembled, the insulator is a universal part, the first insulator 2A and the second insulator 2B are coaxially and tightly matched with the shell part 1, the two axial ends of the jack part 3 are respectively in inserted connection and tight fit with the first insulator 2A and the second insulator 2B, the assembly is simple and efficient, the opposite end faces of the first insulator 2A and the second insulator 2B are respectively provided with a coplanar compensation structure 21, and coplanar compensation is adopted in the place with sudden impedance change, so that the electrical performance and the use frequency of a product are improved; the assembly test result meets the design requirement of 18GHz and meets the requirement of customers.

Preferably, inner step surfaces are provided in each of the first SMA-type port 12 and the second SMA-type port 13, and opposite end surfaces of the first insulator 2A and the second insulator 2B abut against the corresponding inner step surfaces, respectively. The inner step surface is used for fixing and positioning, the insulator and the shell part 1 are axially fixed in a tight fit mode, the fixing is reliable and stable, and the consistency is good.

Preferably, the inner walls of the first SMA type port 12 and the second SMA type port 13 are both provided with shell barbs 11, and the outer walls of the first insulator 2A and the second insulator 2B are respectively in clamping fit with the corresponding shell barbs 11.

As another preferred scheme of this embodiment, the outer walls of the first insulator 2A and the second insulator 2B are both provided with shell barbs 11, and the inner walls of the first SMA-shaped port 12 and the second SMA-shaped port 13 are respectively in snap fit with the corresponding shell barbs 11.

First insulator 2A and second insulator 2B and shell member 1 in this embodiment are connected through shell barb 11 joint, adopt barb fixed mounting mode between, make more to be connected reliably stably between insulator and the shell member 1, can effectively prevent the insulator lateral shifting, have guaranteed the uniformity of product.

Specifically, the jack component 3 includes a first section, a second section and a third section which are sequentially arranged along the axial direction, the first section and the third section are respectively provided with jacks, and the first section and the third section are respectively inserted into the inner holes of the first insulator 2A and the second insulator 2B in a close fit manner. Preferably, the diameter of the second section is greater than the diameters of the first section and the third section, step surfaces are formed at two axial ends of the second section, opposite end surfaces of the first insulator 2A and the second insulator 2B abut against the corresponding step surfaces respectively, the opposite end surfaces of the first insulator 2A and the second insulator 2B are in close contact with the step surfaces at two ends of the jack piece 3 respectively, the jack piece 3 is fixed by blocking the step of the jack piece 3 by the insulator end surface of which two ends are pressed into the shell piece 1, so that the fixed positioning is realized by using the step structure, the tight-fit axial fixation of the jack piece 3, the insulators and the shell piece 1 is realized, and the consistency of products is ensured.

Preferably, the opposite end faces of the first insulator 2A and the second insulator 2B are each grooved, forming the coplanar compensation structure 21. More preferably, the groove is an annular groove.

Preferably, the outer circumference of the housing part 1 is provided with a flange 14. More preferably, the flange 14 is uniformly provided with a plurality of flange holes in the circumferential direction. When the embodiment is used, the flange 14 is used for connecting external equipment, the connection is reliable and stable, and the use reliability is ensured.

The assembly process of this embodiment is as follows:

firstly, one end with a groove of the end face of the first insulator 2A is arranged from the first SMA-type port 12 of the shell member 1, the first insulator 2A is pressed in through a special clamp until the end face of the first insulator 2A is tightly contacted with the inner step face of the shell member 1, and the shell barb 11 clamps the outer wall of the first insulator 2A;

then, any end of the jack piece 3 is installed from one end of the end face groove of the second insulator 2B, the other end of the jack piece 3 is pressed into the first insulator 2A from the second SMA-shaped port 13 through a special fixture, and then the second insulator 2B is pressed into the second SMA-shaped port 13 until the end face of the second insulator 2B is in close contact with the inner step face of the shell member 1, so that the assembly is completed.

In the embodiment, four necessary parts are assembled, the insulator is directly pressed into the shell member 1 through a design clamp, the assembly is simple and efficient, in addition, the insulator adopts a barb fixed installation mode, the jack member 3 is axially fixed in a tight fit mode through the insulators at two ends and the shell member 1, the insulator can be effectively prevented from transversely deviating due to an internal barb structure, the end face of the insulator blocks the step of the jack member 3 to fix the jack member 3, the consistency of products is ensured, and coplanar compensation is adopted in places where the impedance of the products suddenly changes, so that the electrical performance and the use frequency of the products are improved; the assembly test result meets the design requirement of 18GHz and meets the requirement of customers. The structure of the utility model abandons the complex glue filling process, and realizes the performance improvement through the close fit mode of the parts; the electric connector has the characteristics of simple and efficient assembly and excellent electric performance; under the condition of ensuring low cost, the structure can ensure that the electrical parameters meet the requirements of customers and can be assembled and produced in large batch, and is suitable for wide application in the industry.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. The SMA type adapter is characterized by comprising a hollow shell piece (1), wherein a first SMA type port (12) and a second SMA type port (13) are respectively arranged at two axial ends of the shell piece (1), a first insulator (2A) is arranged in the first SMA type port (12) in a tight fit manner, a second insulator (2B) is arranged in the second SMA type port (13) in a tight fit manner, the first insulator (2A) and the second insulator (2B) are coaxially arranged with the shell piece (1), coplanar compensation structures (21) are respectively arranged on opposite end faces of the first insulator (2A) and the second insulator (2B), a jack piece (3) is coaxially arranged in the shell piece (1), jacks are respectively arranged at two axial ends of the jack piece (3), and two axial ends of the jack piece (3) are respectively and tightly fitted and plugged in the first insulator (2A) and the second insulator (2B) in a fit manner ) The inner bore of (a).

2. An SMA-type adaptor according to claim 1, wherein each of said first and second SMA-type ports (12, 13) has an internal step surface disposed therein, and wherein the opposite end faces of said first and second insulators (2A, 2B) abut against the corresponding internal step surfaces, respectively.

3. An SMA-type adapter according to claim 1, wherein the inner walls of said first (12) and second (13) SMA-type ports are provided with shell barbs (11), and the outer walls of said first (2A) and second (2B) insulators are snap-fitted with corresponding said shell barbs (11), respectively.

4. An SMA-type adapter according to claim 1, wherein the outer walls of said first insulator (2A) and said second insulator (2B) are each provided with shell barbs (11), and the inner walls of said first SMA-type port (12) and said second SMA-type port (13) are respectively snap-fitted with said corresponding shell barbs (11).

5. An SMA-type adaptor according to claim 1, wherein said socket member (3) comprises a first section, a second section and a third section arranged in sequence along the axial direction, said first section and said third section being provided with said socket respectively, and said first section and said third section being inserted in tight-fitting manner into the inner bores of said first insulator (2A) and said second insulator (2B) respectively.

6. An SMA-type adaptor according to claim 5, wherein the diameter of the second section is greater than the diameters of the first and third sections, stepped surfaces are formed at both axial ends of the second section, and opposite end faces of the first insulator (2A) and the second insulator (2B) abut against the corresponding stepped surfaces, respectively.

7. An SMA-type adaptor according to claim 1, wherein the opposite end faces of said first insulator (2A) and said second insulator (2B) are each provided with a slot, said slots forming said coplanar compensating structure (21).

8. An SMA-type adaptor according to claim 7, wherein said groove is an annular groove.

9. An SMA-type adapter according to claim 1, characterized in that the housing element (1) is provided with a flange (14) at its periphery.

10. An SMA-type adapter according to claim 9, wherein said flange (14) is provided with a plurality of flange holes uniformly circumferentially.