CN218101762U - SMA (shape memory alloy) bent connector - Google Patents

Abstract

The utility model relates to a SMA (shape memory alloy) curved connector, which comprises a shell, wherein one end of the shell is rotationally connected with a threaded sleeve, the other end of the shell is in threaded connection with a nut, an insulating medium is arranged inside the shell, and a contact pin in an integral bending structure and a jack connected with the contact pin are arranged inside the insulating medium; the contact pin of the utility model adopts an integral bending design, so that the connector has higher cut-off frequency; the impedance discontinuous sections such as steps and barbs are avoided, so that the reflection loss in the signal transmission process is reduced, and the electrical performance index of the connector is more excellent; the insulator I and the two ends of the insulator adopt cambered surface design, so that the connector is of an all-dielectric filling structure, and the connector has better power resistance.

Description

SMA (shape memory alloy) bent connector

Technical Field

The utility model relates to a connector technical field especially relates to a curved formula connector of SMA.

Background

SMA series radio frequency coaxial connectors have the advantages of small volume, wide frequency band, excellent mechanical and electrical properties, high reliability and the like, and are widely applied to the fields of aerospace systems, microwave communication engineering and completed weapons. Compared with a straight connector, when the bent connector is used for wiring at a customer position, a bent cable is not needed, the required wiring space is small, and the bent connector is suitable for high-density wiring requirements. However, with the trend of miniaturization and wider working frequency band of products, the conventional SMA curved connector cannot meet the requirements of customers;

the conventional SMA bent connector occupies a large space; the lap welding mode has higher requirement on the welding process, bad welding spots such as insufficient welding, tip pulling and the like are easy to occur, when the welding spots are abnormal, the electrical performance index of the connector is bad, the shock resistance and the vibration capability are poor, and meanwhile, the phenomenon of over-power ignition caused by the phenomenon of contact-like non-contact is easy to occur; the frequency band of the conventional SMA type bent connector is usually DC-12.4 GHz, and the voltage standing wave ratio is large (more than or equal to 1.5) when the frequency band is DC-18 GHz; meanwhile, the conventional SMA type bent connector contains an air medium and has weak power resistance.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a SMA high performance, high-power curved connector structural design to prior art's not enough, compare conventional SMA curved connector, the connector is suitable for the service environment that the frequency is higher, the electrical property index is more excellent, the power endurance ability is stronger, highly lower, is applicable to little space, high frequency, power requirement.

The utility model discloses an adopt following technical scheme to realize:

the utility model provides a curved formula connector of SMA, includes the shell, shell one end is rotated and is connected with the swivel nut, the nut that shell other end spiro union has, the inside insulating medium that is provided with of shell, the inside jack that is the contact pin of an organic whole structure of bending, is connected with the contact pin that is provided with of insulating medium.

Preferably, the socket comprises a first end with an elastic lobe and a second end with a weld line hole I; the contact pin is connected with the first end of the jack.

Preferably, the insulating medium comprises a first insulator and a second insulator which is vertically connected with the first insulator relatively; and a matched arc-shaped surface structure is arranged at the joint of the first insulator and the second insulator.

Preferably, the first insulator and the second insulator are made of polytetrafluoroethylene.

Preferably, a boss structure is arranged on the first insulator.

Preferably, be provided with on the shell and set up first snap ring groove, the swivel nut inboard sets up second snap ring groove, first snap ring groove and second snap ring inslot portion are equipped with the snap ring, the snap ring is the elastic component.

Preferably, a bushing is arranged in the nut, a second welding line hole is formed in the bushing, and an insulating sheet is arranged inside the shell.

Preferably, the insulating sheet is provided with a central hole and a plurality of electric holes uniformly distributed around the central hole.

Preferably, the contact pin is provided with a first step positioning structure, the shell is internally provided with a second step positioning structure, and the bushing is provided with a third step positioning structure.

Preferably, the shell is provided with a seal ring groove, and a seal ring is arranged in the seal ring groove.

Compared with the prior art, the utility model discloses following profitable technological effect has:

1) The contact pin of the utility model adopts an integral bending design, so that the connector has higher cut-off frequency; the impedance discontinuous sections such as steps and barbs are avoided, so that the reflection loss in the signal transmission process is reduced, and the electrical performance index of the connector is more excellent;

2) The contact pin and the jack of the utility model adopt elastic contact at the opposite insertion position;

3) The utility model discloses an insulator one and insulator two ends adopt the cambered surface design, guarantee that the connector is full medium filling structure, make the connector have better endurance characteristic.

Drawings

The utility model is further described with the following drawings:

fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of the structure of the contact pin of the present invention;

fig. 3 is a schematic view of the structure of the jack of the present invention;

fig. 4 is a schematic structural diagram of the insulator of the present invention;

fig. 5 is a schematic structural view of a second insulator of the present invention;

FIG. 6 is a schematic view of the structure of the insulation sheet of the present invention;

FIG. 7 is a schematic view of the structure of the combined housing of the present invention;

fig. 8 is a schematic view of the explosion structure of the combined shell of the present invention;

fig. 9 is a schematic view of the structure of the bushing of the present invention.

Description of the reference numerals

1. Inserting a pin; 2. a jack; 3. an insulating sheet; 4. a first insulator; 5. a second insulator; 6. a bushing; 7. a housing; 8. a threaded sleeve; 9. a nut; 10. a snap ring; 11. and (5) sealing rings.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1 to 9, the SMA bending connector includes a housing 7, one end of the housing 7 is rotatably connected with a threaded sleeve 8, the other end of the housing 7 is connected with a nut 9 in a threaded manner, an insulating medium is arranged in the housing 7, and a contact pin 1 and a jack 2 connected with the contact pin 1 are arranged in the insulating medium and are of an integral bending structure;

as shown in fig. 2, the pin 1 adopts an integral bending design, so that the connector has a higher cut-off frequency; impedance discontinuous sections such as barbs and steps are not provided, reflection in the signal transmission process is effectively reduced, and therefore electrical performance indexes such as voltage standing wave ratio, insertion loss and the like of the connector are effectively reduced; the contact pin 1 is provided with a step positioning structure I for limiting the opposite insertion of the contact pin 2;

as shown in fig. 3, the first end of the elastic lobe of the jack 2 is inserted into the pin 1 to realize signal transmission, the first cable welding wire hole at the second end is welded to the cable core wire to ensure reliable connection, the outer diameter of the jack 2 is consistent with that of the pin 1 to ensure impedance continuity, and the second end of the jack 2 effectively compensates impedance mismatch of the elastic lobe;

as shown in fig. 4 and 5, the first insulator 4 adopts a boss design to ensure the interface size of the connector, and the first insulator 4 and the second insulator 5 adopt cambered surface structures to ensure good contact at the right-angle corner of the connector, so that all-dielectric filling of the connector is realized without introducing air dielectric; the first insulator 4 and the second insulator 5 are made of polytetrafluoroethylene materials, and the dielectric constant of the polytetrafluoroethylene materials is far greater than that of air, so that the connector has better power resistance;

as shown in fig. 6, the central hole of the insulating sheet 3 is used for fixing the cable core, and meanwhile, the core is limited when being inserted into the jack of the jack 2, so as to ensure the fixing and installation of the cable core, and 5 holes uniformly distributed around the insulating sheet 3 are electric holes for adjusting and matching the index of the whole connector;

as shown in fig. 7, the combined shell is composed of a bush 6, a shell 7, a threaded sleeve 8, a nut 9, a snap ring 10 and a seal ring 11, the combined shell is a main body and a supporting structure of the whole connector and is used for a pin 1, a jack 2, an insulating sheet 3, a first insulator 4 and a second insulator 5, the shell 7 is connected with the nut 9 through threads, the shell 7 is connected with the threaded sleeve 8 through the snap ring 10, the bush 6 is used for welding a cable and is used as a main assembly body of the connector, and the combined shell plays a key role in performance and reliability of the connector;

as shown in fig. 8, the screw sleeve 8 and the housing are connected and combined through a snap ring 10, the snap ring 10 is an elastic member, the snap ring 10 is firstly installed in a first snap ring groove of the housing 7 during assembly, the snap ring 10 is clamped by a snap ring clamp, then the screw sleeve 8 is pressed on the snap ring 10, and when the press fit is in place, the snap ring 10 is clamped between the first snap ring groove of the housing 7 and a second snap ring groove of the screw sleeve 8, so that the connection between the screw sleeve 8 and the housing 7 is completed; a step positioning structure II is arranged in the shell 7 and used for assembling the lining 6; the sealing ring 11 is used for preventing water at the interface end;

as shown in fig. 1, 7 and 8, the nut 9 is mainly used for fixing the bush 6, assembling the whole connector together, and screwing and connecting the shell 7 together to complete the assembly of the whole connector;

as shown in fig. 9, the stepped positioning structure three of the bush 6 is used for positioning when the bush is assembled with the housing 7 and the nut 9, and the wire welding hole two of the bush 6 is used for welding with a cable.

The assembly sequence is as follows: the contact pin 1 is firstly installed into the shell 7, the first insulator 4 and the second insulator 5 are pressed into the shell 7 (attention is paid to the oblique angle direction of the cambered surface structures of the first insulator 4 and the second insulator 5), then the snap ring 10 is sleeved on the shell 7, the threaded sleeve 8 is pressed on the snap ring 10 (the threaded sleeve is required to rotate flexibly and is free of clamping phenomenon), finally the bush 6 is installed into the nut 9 and screwed into the shell 7 together (the shell 7 is not required to be screwed up and cannot fall off and is screwed up after welding is completed), and the jack 2 and the insulating sheet 3 are matched parts used when cables are welded and are packaged along with products.

The utility model is verified by various experiments such as vibration, warm punching and the like, and is applicable to the environments such as ground, machine-carried, missile-borne and the like; can realize that the standing wave is less than or equal to 1.3 under the frequency of DC ~ 18GHz, the standing wave is less than or equal to 1.5's electrical property requirement under the frequency of DC ~ 26.5GHz, the utility model discloses when operating band is DC ~ 18GHz, the standing wave is less than or equal to 1.3, (conventional SMA curved formula connector when operating band is DC ~ 18GHz, the standing wave is greater than or equal to 1.5), and in customer department installation test, satisfy customer small space installation requirement, and when carrying out the power test along with customer's complete machine, the phenomenon of striking sparks of overpower does not appear. The utility model discloses superior in the structure is reliable, the electrical property, has solved narrow, the poor shortcoming of endurance capacity of SMA curved connector operating frequency band, has widened the operating frequency band of SMA curved connector, has promoted the endurance capacity of SMA curved connector, is worth using in batches and promoting greatly.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

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 technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (10)

1. The utility model provides a curved formula connector of SMA which characterized in that, includes shell (7), shell (7) one end is rotated and is connected with swivel nut (8), nut (9) that shell (7) other end spiro union has, shell (7) inside is provided with insulating medium, inside being provided with of insulating medium is integrative the contact pin (1) of bending the structure, jack (2) be connected with contact pin (1).

2. The SMA elbow connector according to claim 1, wherein the receptacle (2) comprises a first end having resilient lobes and a second end having a first wire hole; the contact pin (1) is connected with the first end of the jack (2).

3. The SMA elbow connector according to claim 1, wherein the insulating medium comprises a first insulator (4), a second insulator (5) connected perpendicularly to the first insulator (4); and a matched arc-shaped surface structure is arranged at the joint of the first insulator (4) and the second insulator (5).

4. The SMA elbow connector according to claim 3, wherein the first insulator (4) and the second insulator (5) are made of teflon.

5. The SMA elbow connector according to claim 4, wherein the first insulator (4) is provided with a boss structure.

6. The SMA elbow connector according to claim 1, wherein a first snap ring groove is formed in the housing (7), a second snap ring groove is formed in the inner side of the threaded sleeve (8), and snap rings (10) are assembled in the first snap ring groove and the second snap ring groove, and the snap rings (10) are elastic members.

7. The SMA elbow connector according to claim 1, wherein a bushing (6) is provided in the nut (9), a second weld line hole is provided in the bushing (6), and an insulating sheet (3) is provided inside the outer shell (7).

8. The SMA elbow connector according to claim 7, wherein the insulating sheet (3) is provided with a central hole and a plurality of electrical holes uniformly distributed around the central hole.

9. The SMA elbow connector according to claim 7, wherein a first step positioning structure is provided on the pin (1), a second step positioning structure is provided in the housing (7), and a third step positioning structure is provided on the bush (6).

10. SMA elbow connector according to claim 1, characterized in that the housing (7) is provided with a sealing ring groove in which a sealing ring (11) is arranged.

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