CN218648280U

CN218648280U - Compact coaxial contact assembly for electrical connector

Info

Publication number: CN218648280U
Application number: CN202222376890.9U
Authority: CN
Inventors: 李富盛; 陈壮; 施重庆
Original assignee: Amphenol Changzhou Advanced Connector Co Ltd
Current assignee: Amphenol Changzhou Advanced Connector Co Ltd
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2023-03-17
Anticipated expiration: 2032-09-07

Abstract

The utility model relates to a technical field of connector especially relates to a small-size coaxial contact assembly for electric connector. This kind of a small-size coaxial contact subassembly for electric connector includes insulator, outer conductor and terminal etc, and the crimping is connected to the cable inner conductor in one side of terminal and outer conductor, and the terminal is connected and is fixed in the insulator, and this kind of a small-size coaxial contact subassembly for electric connector can realize higher transmission frequency, and the product volume is littleer, and the modularization of being convenient for is assembled and is realized the multichannel integration, and the mass production can be realized to the production technology is simpler.

Description

Compact coaxial contact assembly for electrical connector

Technical Field

The present invention relates to an electrical connector, and more particularly to a small coaxial contact assembly for an electrical connector.

Background

With the rapid development of the automobile industry, the automatic driving grade of the automobile is continuously improved; this requires more transmission channels and higher frequencies for onboard RF (radio frequency) interconnect systems, and conventional automotive "FAKRA" interconnect systems have no longer met future requirements based on size and frequency range limitations. For example, 360-degree look around, fatigue driving, 5G communication, GPS, vehicle-machine communication can make RF (radio frequency) interconnection system of the entire vehicle reach more than 10, and using traditional vehicle "FAKRA" interconnection system can occupy more space and already requires higher cost; therefore, there is a need to develop a small coaxial contact assembly with higher frequency, smaller size, and more convenient modular assembly and mass production to adapt to the development of the automobile industry.

In the prior art, a contact member for an electrical connector has an outer conductor, an inner conductor, and a protective insulator extending outside of a front end portion of the outer conductor for a close-type entry fitting. The structure has the following defects: 1. in the outer conductor contact area and the protective insulator part, the insulator is raised outwards and is higher than the outer conductor elastic arm, so that the outer conductor elastic arm is protected, but the part of the insulator extending out of the outer conductor can only be made very weak due to the structural limitation and performance matching of the matching end, and the protective part of the insulator is easily damaged in use; 2. the matching parts of the two wings of the terminal and the insulator are not avoided, the two wings are always in a compressed state after the terminal is inserted into the insulator, and the risk that the two wings are crushed and lose elastic failure exists; 3. the installation needs to control the forward positioning size of the terminal through the insertion depth of the cable and the crimping, the installation completely depends on a machine, and the terminal has the risk of protruding out of an insulator when the cable is bent under stress; 4. rely on two metal protruding hems on the outer sleeve to pierce two windows of outer conductor and stretch into the annular circumference recess of insulator and fix the insulator and outer conductor's relative position relation in the front and back, because of the product is less, need make the product not to rock after packing into simultaneously again, this makes the annular groove of insulator and the window width of outer conductor all very little, need make two recesses and the outer conductor window of insulator adjust well and make two protruding hems of outer sleeve insert very difficultly accurately, original structure need wrap the circle to the outer conductor with outer sleeve crimping when piercing simultaneously, the technology complicacy need use special mould class frock just can produce, be unfavorable for product batch popularization.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving the above-mentioned drawbacks and provides a small coaxial contact assembly for an electrical connector.

In order to overcome the defects existing in the prior products, the utility model provides a technical scheme that its technical problem adopted is: the small coaxial contact assembly for the electric connector comprises an insulator, an outer conductor and a terminal, wherein one side of the terminal is connected with a cable after being crimped through a crimping area, the terminal is connected and fixed in the insulator, the insulator is connected and fixed in the outer conductor in an insertion mode, the front end of the insulator is provided with a connecting end and a fixed end, the connecting end enables the insulator to be fixed in the outer conductor, the connecting end comprises a cylinder body at the front end of the connecting end, at least 1 protruding rib extending backwards from the front end of the cylinder body is arranged on the cylinder body, ribs corresponding to the protruding ribs are arranged on the fixed end, the extending part at the rear end of each protruding rib comprises a concave part which is flush with the ribs, and a groove for performance compensation and fixation is formed among the ribs;

the outer conductor comprises a front end part, a middle part and a rear end part, the front end part is used for connecting the insulator, the middle part is connected with the U-shaped clamping ring, the rear end part is used for connecting and fixing the support ring and the cable, at least 3 finger-shaped parts are arranged at the front end part, at least 1 clamping groove used for clamping the raised ribs is formed between the finger-shaped parts, a notch and a window are arranged on the middle part, a V-shaped lug and an elastic arm are arranged on the U-shaped clamping ring, the V-shaped lug is clamped into the window which is inwards concave on the middle part, and the elastic arm is clamped into the notch to enable the U-shaped clamping ring to be connected to the middle part in a pre-buckling manner;

the insulator is internally provided with an annular groove used for matching with two wings on the avoidance terminal;

the terminal is provided with a boss protruding upwards, and the terminal is inserted into the insulator and then positioned in an interference mode with the insulator.

According to another embodiment of the invention, it is further provided that the end edge of the nose part is inwardly tapered to a diameter smaller than the diameter of the nose part.

According to another embodiment of the present invention, it further comprises that the V-shaped protrusion is located in the groove to fix the insulator forward.

According to the utility model discloses a further embodiment, further include the bullet arm is contradicted and is connected on the notch of outer conductor, makes the U-shaped snap ring before the crimping can the pre-fixing with the outer conductor and make after the crimping of U-shaped snap ring and outer conductor between can not rotate relatively.

According to the utility model discloses a further embodiment, further include the protruding rib tail end conflict of insulator is connected to the draw-in groove root and makes the insulator can fix backward.

According to the utility model discloses a further embodiment, further include the window of protruding rib, recess and the draw-in groove of outer conductor, indent of insulator has and makes the insulator pack into and has 1 recess to correspond the specific relative position relation at the window all the time behind the outer conductor.

According to the utility model discloses a further embodiment, further include have an ascending bellied contact bump on every finger portion of outer conductor, dislocation around the contact bump on two adjacent finger portions makes the contact bump on all finger portions be divided into two sets of consecutive contacts around with when joining in marriage the end cooperation in order to reduce to the time-matching insertion force.

The utility model has the advantages that: the small coaxial contact assembly for the electric connector can realize higher transmission frequency, has smaller product volume, is convenient for modularized assembly to realize multi-path integration, has simpler production process and can realize mass production.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic structural view of an explosion diagram of the present invention;

FIG. 2 is a schematic view of the insulator of FIG. 1;

FIG. 3 is a schematic view of the structure of the outer conductor of FIG. 1;

FIG. 4 is a schematic view of the structure of the other side of the outer conductor of FIG. 1;

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

fig. 6 is a schematic structural diagram of the left side view of the present invention;

FIG. 7 isbase:Sub>A schematic view of the structure in the direction A-A in FIGS. 5 and 6;

FIG. 8 is a schematic view of the structure in the direction B-B in FIG. 6;

wherein: 1. insulator, 2, outer conductor, 3, terminal, 4, support ring, 5, cable, 6, U-shaped snap ring, 7, column, 8, raised rib, 9, connection end, 10, recess, 11, end edge, 12, snap groove, 13, front end, 14, middle, 15, V-shaped bump, 16, boss, 17, finger, 18, notch, 19, rear end, 20, annular groove, 21, wings, 22, spring arm, 23, fixed end, 24, rib, 25, groove, 26, window.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The embodiments of the basic utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 8, which include an insulator 1, an outer conductor 2, and a terminal 3, one side of the terminal 3 is connected to an inner conductor of a cable 5 by crimping, and the terminal 3 is connected and fixed to the inside of the insulator 1.

As shown in fig. 2, the insulator 1 is connected to the outer conductor 2 in an insertion manner, the insulator 1 does not protrude outside the outer conductor 2 and is completely covered in the outer conductor 2, the outer conductor can effectively protect the insulator 1, the front end of the insulator 1 is provided with a connecting end 9 for fixing the insulator 1 in the outer conductor 2 and a fixing end 23 connected with the connecting end 9, the connecting end 9 comprises a column 7 at the front end of the connecting end, the column 7 is provided with a raised rib 8 extending backwards from the front end of the column 7, the fixing end 23 is provided with a rib 24 corresponding to the raised rib 8, the extending part at the rear end of the raised rib 8 comprises a concave part 10 flush with the rib 24, and a groove 25 is formed between the ribs 24.

As shown in fig. 3 and 4, the outer conductor 2 includes a front end portion 13 for connecting the insulator 1 inside, an intermediate portion 14 for connecting the U-shaped snap ring 6, and a rear end portion 19 for connecting the fixed support ring 4, the front end portion has an end face circle size inward, the end face diameter is reduced, which is more favorable for guiding the insertion during the insertion, and is not easy to damage, at least 3 finger portions 17 are provided at the front end portion 13, at least 1, especially 3, are formed between the finger portions 17 for being clamped into the clamping grooves 12 of the raised ribs 8, the intermediate portion 14 is provided with notches 18 and windows 26, the U-shaped snap ring 6 is provided with V-shaped protrusions 15 and elastic arms 22, the V-shaped protrusions 15 are clamped into the inwardly concave windows 26 on the intermediate portion 14, the elastic arms 22 are clamped into the notches 18 to pre-lock the U-shaped snap ring 6 to the intermediate portion 14, the elastic arms 22 are simultaneously pressed against the notches 18 of the outer conductor 2, so as to realize the function of preventing the relative rotation between the U-shaped snap ring 6 and the outer conductor 2;

as shown in fig. 8, the insulator 1 is provided with an annular groove 20 for matching and avoiding two wings 21 on the terminal 3, and the two wings 21 are compressed after the terminal 3 is inserted into the insulator 1 until the two wings reach the annular groove 20 matched with the two wings, and the annular groove 20 can avoid in the whole circumferential direction, so that the two wings are in a free extension state after the terminal is inserted, and the risk that the two wings 21 lose elasticity and fail due to crushing is prevented;

as shown in fig. 7, the terminal 3 is provided with a boss 16 protruding upward, and is positioned by interference with the insulator after being inserted into the insulator, and the terminal 3 is positioned by interference with the insulator after being inserted into the insulator 1, so that the forward positioning dimension of the terminal 3 can be ensured.

Wherein the end edge 11 of the front end portion 13 is inwardly constricted to a diameter smaller than that of the front end portion 13.

Wherein the V-shaped projection 15 is located in the groove 25, and the V-shaped projection 15 on the U-shaped snap ring 6 is placed in the window 26 of the outer conductor 2 and is located in the groove 25 at the same time when assembled, thereby positioning the forward dimension of the insulator 1.

The elastic arms 22 are in abutting joint with the notches 18 of the outer conductor 2, so that the U-shaped snap ring 6 cannot rotate relative to the outer conductor 2 after being crimped, the U-shaped snap ring can be pre-buckled on the outer conductor through the elastic arms on two sides, then crimping and rounding wrapping are carried out, the manual semi-automatic production can be realized only by using common crimping tools and processes, and meanwhile, the production process is simplified, so that the manual semi-automatic production is more beneficial to batch production of development automation equipment.

Wherein, 8 tail ends of the protruding ribs of insulator 1 are connected to the root of the clamping groove 12 in a butting mode, the insulator is inserted from the front end of the outer conductor during assembly, the protruding ribs 8 are inserted into the clamping groove 12 until the tail ends of the ribs 8 abut against the root of the clamping groove 12, and therefore the backward size of the insulator 1 is located.

Wherein there are 1 and more, especially 3 protruding ribs 8 extending backwards from its front end on the column 7, for the purpose of the fitting of the insulator 1 to the outer conductor 2, the ribs being able to be inserted into at least 1 groove 12 of the outer conductor 2 until the roots fit against, to position the backward dimension of the insulator 1;

as shown in fig. 6, the number of the grooves 12 is greater than or equal to the number of the ribs 8, and the circumferential positions correspond to ensure that the insulator 1 can be inserted into the outer conductor 2; at least 3 raised ribs 24 are arranged on the fixed end 23, grooves 25 for performance compensation and fixation are formed among the ribs 24, and the raised ribs 8, the ribs 24 and the grooves 25 of the insulator 1 have specific relative position relations with the clamping grooves 12 and the inward concave windows 26 of the outer conductor 2, so that 1 groove 25 is always corresponding to the position of the window 26 after the insulator 1 is installed in the outer conductor 2, and the V-shaped convex block 15 of the U-shaped snap ring 6 can extend into the groove 25 through the window 26 and be clamped in the groove 25 to position the insulator 1 during assembly.

Wherein, every finger-shaped portion 17 of outer conductor 2 is gone up to have an upwards bellied contact bump to contact bump on two adjacent finger-shaped portions 17 has front and back dislocation relation, makes all contact bumps can be divided into front and back 2 groups in the circumferencial direction, and front and back 2 groups contact in proper order when cooperating with the joining in marriage the end, compares that traditional all contacts can effectively reduce the plug and pull force when joining in marriage in same periphery distribution design.

Assembling: firstly, inserting an insulator 1 from the front end of an outer conductor 2, enabling a protruding rib 8 on the insulator 1 to be clamped into a clamping groove 12, then installing a U-shaped snap ring 6 on a middle part 14 of the outer conductor 2, enabling a V-shaped lug 15 of the U-shaped snap ring 6 to be clamped into a window 26 which is inwards concave on the middle part 14, simultaneously enabling the U-shaped snap ring 6 to be pre-buckled and connected to the middle part 14 through clamping elastic arms 22 on two sides into a notch 18, then performing compression joint and rounding, at the moment, enabling the V-shaped lug 15 to be located in a groove 25 formed between ribs 24 on the insulator 1, enabling the elastic arms 22 to be in interference connection with the notch 18 of the outer conductor 2, after the U-shaped snap ring 6 is installed, inserting a cable 5 which is subjected to compression joint and is well inserted into the insulator 1, enabling two wings 21 on the terminal 3 to enter an annular groove 20 of the insulator 1, arranging an upwards protruding lug 16 on the terminal 3, interfering and positioning with the insulator after the cable 5 is inserted, and finally, crimping and rounding a shielding layer and a sheath of the rear end part 19 and the cable 5.

The above, only be the embodiment of the preferred of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, which are designed to be replaced or changed equally, all should be covered within the protection scope of the present invention.

Claims

1. A small-sized coaxial contact assembly for an electrical connector, comprising an insulator (1), an outer conductor (2) and a terminal (3), one side of the terminal (3) being crimped by a crimping zone to connect a cable (5), the terminal (3) being connected and fixed to the inside of the insulator (1), characterized in that:

the insulation body (1) is connected in an insertion mode and fixed into the outer conductor (2), a connecting end (9) enabling the insulation body (1) to be fixed in the outer conductor (2) and a fixed end (23) connected with the connecting end (9) are arranged at the front end of the insulation body (1), the connecting end (9) comprises a cylinder (7) at the front end of the connection body, at least 1 protruding rib (8) extending backwards from the front end of the cylinder (7) is arranged on the cylinder (7), ribs (24) corresponding to the protruding ribs (8) are arranged on the fixed end (23), the extending portion of the rear end of each protruding rib (8) comprises a concave portion (10) flush with the corresponding rib (24), and a groove (25) for performance compensation and fixation is formed between the ribs (24);

the outer conductor (2) comprises a front end part (13) enabling the insulator (1) to be connected to the inside of the outer conductor, a middle part (14) connected with the U-shaped snap ring (6) and a rear end part (19) used for connecting and fixing the support ring (4) and the cable (5), at least 3 finger-shaped parts (17) are arranged at the front end part (13), at least 1 clamping groove (12) used for clamping the protruding ribs (8) is formed between the finger-shaped parts (17), a notch (18) and a window (26) are formed in the middle part (14), a V-shaped bump (15) and an elastic arm (22) are arranged on the U-shaped snap ring (6), the V-shaped bump (15) is clamped into the window (26) which is inwards concave in the middle part (14), and the elastic arm (22) is clamped into the notch (18) to enable the U-shaped snap ring (6) to be connected to the middle part (14) in a pre-buckled mode;

an annular groove (20) used for matching two wings (21) on the avoiding terminal (3) is arranged in the insulator (1);

and the terminal (3) is provided with a boss (16) protruding upwards, and is inserted into the insulator and then positioned by interference with the insulator.

2. The miniaturized coaxial contact assembly for an electrical connector of claim 1, wherein: the end edge (11) of the front end (13) is inwardly tapered to a diameter smaller than the diameter of the front end (13).

3. The miniaturized coaxial contact assembly for an electrical connector of claim 1, wherein: the V-shaped projection (15) is positioned in the groove (25) so that the insulator (1) can be forwards fixed.

4. The miniaturized coaxial contact assembly for an electrical connector of claim 1, wherein: the elastic arm (22) is connected to the notch (18) of the outer conductor (2) in an abutting mode, so that the U-shaped clamping ring (6) can be pre-fixed with the outer conductor (2) before crimping, and the U-shaped clamping ring (6) cannot rotate relative to the outer conductor (2) after crimping.

5. The miniaturized coaxial contact assembly for an electrical connector of claim 1, wherein: the tail ends of the raised ribs (8) of the insulator (1) are butted and connected to the root of the clamping groove (12) so that the insulator (1) can be fixed backwards.

6. The miniaturized coaxial contact assembly for an electrical connector of claim 1, wherein: the protruding ribs (8), the ribs (24), the grooves (25) of the insulator (1), the clamping grooves (12) of the outer conductor (2) and the concave window (26) have a specific relative position relation which enables the insulator (1) to be provided with 1 groove (25) corresponding to the window (26) after being installed in the outer conductor (2).

7. The compact coaxial contact assembly for an electrical connector of claim 1, wherein: each finger-shaped part (17) of the outer conductor (2) is provided with an upward convex contact salient point, and the contact salient points on two adjacent finger-shaped parts (17) are staggered front and back, so that the contact salient points on all the finger-shaped parts (17) are divided into a front group and a back group to be contacted sequentially when matched with a matching end, and the insertion force during matching is reduced.