CN111403972A

CN111403972A - Fakra connector

Info

Publication number: CN111403972A
Application number: CN202010372005.2A
Authority: CN
Inventors: 邬仁甫; 胡田华; 何志刚
Original assignee: Goldenconn Electronic Technology Co Ltd
Current assignee: Goldenconn Electronic Technology Co Ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2020-07-10

Abstract

The invention relates to a Fakra connector which comprises a metal conductive seat and an insulating plastic seat. The metal conductive seat comprises a conductive shell body and an inserting column. A limiting plate is arranged in the insulating plastic seat. The limiting plate is provided with a mounting through hole for the insertion column to pass through. The limiting plate is also provided with an arc-shaped clamping section which is formed by extending the side wall of the mounting through hole along the radial direction. And a clamping arm extends continuously along the side wall of the limiting plate, and a clamping bulge is arranged on the clamping arm. Extend around the lateral wall of grafting post and have the second axial spacing flange with protruding looks adaptation of joint with the first axial spacing flange of arc joint section looks adaptation. Therefore, a double-buckle connection relation is formed between the metal conductive seat and the insulating plastic seat, the inserting reliability of the metal conductive seat and the insulating plastic seat is further ensured, and the reliability of the electric connection of the Fakra connector and the element matched with the Fakra connector is ensured.

Description

Fakra connector

Technical Field

The invention relates to the technical field of connector manufacturing, in particular to a Fakra connector.

Background

The Fakra connector is mainly applied to transmission of radio frequency signals, is expanded to the field of video signal transmission after coaxial and L VDS signal conversion C appear in the market, is widely applied to the field of automobile electronic entertainment systems, and belongs to an important part for signal transmission among vehicle-mounted multimedia equipment.

The Fakra connector is composed of a metal conductive seat and an insulating plastic seat, and the metal conductive seat is inserted into the insulating plastic seat for matching use so as to transmit signals. However, in the prior art, an effective axial limiting function portion is not provided between the metal conductive seat and the insulating plastic seat, so that, in the practical application process, when an external force is applied, the metal conductive seat is easily displaced axially relative to the insulating plastic seat, which may cause the electrical connection failure between the wiring terminal and the mating element in the metal conductive seat, and the mating element in the plug column, and further affect the reliability and stability of signal transmission. Thus, a skilled person is urgently needed to solve the above problems.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the Fakra connector which has simple structural design, is beneficial to manufacturing and molding, ensures that the metal conductive seat has high connection stability relative to the insulating plastic seat, and avoids the relative displacement phenomenon.

In order to solve the technical problem, the invention relates to a Fakra connector which comprises a metal conductive seat and an insulating plastic seat. The metal conductive seat comprises a metal conductive piece, an insulating column and a wiring terminal. The metal conductive piece comprises a conductive shell body and an inserting column. The plug column is formed by extending the left side wall of the conductive shell body leftwards continuously, and a first accommodating cavity is arranged in the plug column. Binding post wears to establish, is fixed in the insulating cylinder in, and wholly puts into first holding the intracavity. The metal conductive seat is inserted and jointed with the insulating plastic seat along the direction from right to left by means of the inserting column, and correspondingly, a second accommodating cavity is arranged in the insulating plastic seat and used for placing the inserting column. A limiting plate is arranged in the insulating plastic seat. The limiting plate is arranged in the second accommodating cavity and fixed in the second accommodating cavity, and is provided with a mounting through hole for the insertion column to pass through. The limiting plate is also provided with an arc-shaped clamping section which is formed by extending the side wall of the mounting through hole along the radial direction. And a plurality of clamping arms continuously extend rightwards along the right side wall of the limiting plate, and are circumferentially and uniformly distributed around the central axis of the mounting through hole. The free end of the clamping arm is provided with a clamping bulge, and the clamping bulge extends along the radial direction of the limiting plate. Outwards extend around the lateral wall of grafting post and have the first axial spacing flange with above-mentioned arc joint section adaptation, with the protruding looks adaptation's of above-mentioned joint second axial spacing flange, arrange according to the preface along from left to right direction, and be parallel to each other.

As a further improvement of the technical scheme of the invention, the outer diameter of the first axial limiting flange is set to be D1, and the arc diameter of the arc clamping section is set to be D2, so that the diameter of D1-D2 is more than or equal to 0.1mm and less than or equal to 0.4 mm.

As a further improvement of the technical scheme of the invention, a first guide inclined plane is arranged on the first axial limiting flange and is formed by obliquely cutting the left side wall of the first axial limiting flange rightwards. And a second guide inclined plane is arranged on the second axial limiting flange and is formed by obliquely cutting the left side wall of the second axial limiting flange rightwards. And a third guide inclined plane is arranged on the arc-shaped clamping section and is formed by obliquely cutting the right side wall of the arc-shaped clamping section leftwards. The clamping protrusion is provided with a fourth guide inclined plane which is formed by obliquely cutting the right side wall of the clamping protrusion leftwards.

As a further improvement of the technical scheme of the invention, the limiting plate and the insulating plastic seat are integrally formed by injection molding.

As a further improvement of the technical scheme of the invention, a circumferential limit flange extends outwards around the outer side wall of the insertion column right behind the second axial limit flange. The quantity of circumference limit flange sets up to a plurality ofly, carries out circumference equipartition around the central axis of grafting post, and is formed with between the two adjacent circumference limit flange and dodges the recess. When the metal conductive seat is inserted, jointed and butted relative to the insulating plastic seat, the clamping protrusion is arranged in the avoiding groove.

Compared with the Fakra connector with the traditional design structure, in the technical scheme disclosed by the invention, the axial limiting part is additionally arranged between the metal conductive seat and the insulating plastic seat, and in the process of inserting, jointing and butting the metal conductive seat relative to the insulating plastic seat, the side wall of the first axial limiting flange extrudes the arc-shaped clamping section, so that elastic backward movement is generated until the metal conductive seat completely passes through the arc-shaped clamping section to form first clamping connection, and meanwhile, the clamping bulge is positively hooked on the side wall of the second axial limiting flange to form second clamping connection. Therefore, the reliability of splicing the metal conductive seat and the insulating plastic seat is effectively ensured, the relative axial displacement between the metal conductive seat and the insulating plastic seat is prevented, the reliability of electric connection between the Fakra connector and an element matched with the Fakra connector is ensured, and the stable proceeding of a signal transmission process is further ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective assembly view of a Fakra connector of the present invention.

Fig. 2 is an exploded schematic view of a Fakra connector of the present invention.

Fig. 3 is a top view of fig. 1.

Fig. 4 is a sectional view a-a of fig. 3.

Fig. 5 is a sectional view B-B of fig. 3.

Fig. 6 is a perspective view of a metal conductive member in the Fakra connector of the present invention.

Fig. 7 is a side view of fig. 6.

FIG. 8 is a perspective view of an insulating plastic seat of the Fakra connector of the present invention.

Fig. 9 is a top view of fig. 8.

Fig. 10 is a cross-sectional view C-C of fig. 9.

Fig. 11 is a perspective view of another perspective view of the insulating plastic seat of the Fakra connector of the present invention.

1-a metal conductive seat; 11-a metal conductive member; 111-a conductive shell body; 112-a plug column; 1121 — a first receiving cavity; 1122-a first axial stop flange; 11221-a first guide ramp; 1123-a second axial stop flange; 11231-a second guide ramp; 1124-circumferential limit flanges; 1125-avoiding a groove; 12-an insulating column; 13-a connecting terminal; 2-insulating plastic seat; 21-a second containing cavity; 22-a limiting plate; 221-mounting a through hole; 222-an arc clamping section; 2221-third guide slope; 223-a snap arm; 2231-a snap-fit projection; 22311 fourth guide ramp.

Detailed Description

In the description of the present invention, it is to be understood that the terms "left", "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The present invention will be described in detail with reference to the following embodiments, and fig. 1 and fig. 2 respectively show a three-dimensional assembly diagram and an explosion diagram of the Fakra connector according to the present invention, and it can be understood that the Fakra connector mainly comprises a metal conductive seat 1 and an insulating plastic seat 2. The metal conductive socket 1 includes a metal conductive member 11, an insulating column 12, and a connection terminal 13. The metal conductive member 11 includes a conductive shell body 111 and a plug column 112. The plug column 112 is formed by extending the left sidewall of the conductive shell body 111 to the left, and a first accommodating cavity 1121 is disposed therein. The terminal 13 is inserted into and fixed to the insulating column 12, and is integrally disposed in the first accommodating cavity 1121. The metal conductive seat 1 is inserted and butted with the insulating plastic seat 3 along the right-to-left direction by means of the insertion column 112, and accordingly, a second accommodating cavity 31 is provided in the insulating plastic seat 3 for placing the insertion column 112. In addition, a stopper plate 22 is provided in the insulating plastic seat 2. The position-limiting plate 22 is disposed inside and fixed in the second accommodating cavity 31, and has a mounting through hole 221 for the insertion column 112 to pass through. The limiting plate 22 is further provided with an arc-shaped clamping section 222 formed by extending the side wall of the installation through hole 221 along the radial direction. A plurality of snap arms 223 extend continuously rightward along the right side wall of the stopper plate 22 and are circumferentially and uniformly distributed around the central axis of the mounting through hole 221. A catching projection 2231 is provided at a free end of the catching arm 223 and extends in a radial direction of the stopper plate 22. A first axial limiting flange 1122 adapted to the arc-shaped clamping section 222 and a second axial limiting flange 1123 adapted to the clamping protrusion 2231 extend outwards around the outer side wall of the plug post 112, and are sequentially arranged from left to right and parallel to each other (as shown in fig. 3, 4, 6-11). Therefore, the reliability of splicing the metal conductive seat 1 and the insulating plastic seat 2 is effectively ensured, the relative axial displacement between the metal conductive seat and the insulating plastic seat is prevented, the reliability of electric connection between the Fakra connector and an element matched with the Fakra connector is ensured, and the stable proceeding of a signal transmission process is further ensured.

The working principle of the above-described Fakra connector is substantially as follows: in the process of inserting, jointing and butting the metal conductive seat 1 relative to the insulating plastic seat 2, the inserting column 112 performs displacement motion along the central axis of the edge plastic female seat 2, and then is inserted into the installation through hole 221, and then the inserting column 112 continues to perform displacement motion, so that the side wall of the first axial limiting flange 1122 on the inserting column extrudes the arc-shaped clamping section 222, the arc-shaped clamping section 222 performs elastic retraction motion until the arc-shaped clamping section 222 completely crosses the arc-shaped clamping section 222, so as to form first clamping connection, meanwhile, the clamping protrusion 2231 on the clamping arm 223 is hooked on the side wall of the second axial limiting flange 1123, so as to form second clamping connection, so that reliable inserting and jointing of the metal conductive seat 1 relative to the insulating plastic seat 2 is realized, and the phenomenon of 'disengaging' is avoided.

Generally, when the first axial retention flange 1122 has an improper size fit relation with the curved clamping section 222, it is very likely that the insertion of the plug post 112 is difficult or the snap connection fails, and therefore, the first axial retention flange size 1122 and the size of the curved clamping section 222 adapted to the first axial retention flange need to be strictly controlled. Thus, long-term experimental results have demonstrated that the above problems are better solved when the first axial retention flange 1122 and the arcuate clamping section 222 have the following dimensional relationships, as follows: assuming that the outer diameter of the first axial position-defining flange 1122 is set to D1 and the arc diameter of the arcuate clamping section 222 is set to D2, 0.1mm ≦ D1-D2 ≦ 0.4mm (as shown in FIGS. 7 and 10).

In order to reduce the difficulty of inserting and assembling the plug-in post 112 with respect to the limit plate 22, a first guiding inclined surface 11221 may be further disposed on the first axial limit flange 1122, which is formed by chamfering the left side wall of the first axial limit flange 1122 to the right. On the second axial position-defining flange 1123, a second guide slope 11231 is provided, which is chamfered rightward (as viewed in fig. 7) from the left side wall of the second axial position-defining flange 1123. A third guiding inclined surface 2221 is provided on the arc-shaped clamping section 222, and is formed by obliquely cutting the right side wall of the arc-shaped clamping section 222 to the left. A fourth guide slope 22311 is provided on the catching protrusion 2231, which is formed by chamfering the right side wall of the catching protrusion 2231 to the left (as shown in fig. 11).

Generally speaking, from the aspect of manufacturing process, the limiting plate 22 and the insulating plastic seat 2 can be formed separately, and then the limiting plate is fixed in the second accommodating cavity 21 of the insulating plastic seat 2 by means of welding, however, this operation is tedious in actual implementation, and the limiting plate 22 is easily dropped from the inner side wall of the second accommodating cavity 21, so as to affect the actual application effect thereof, in view of this, a forming method is proposed in this embodiment, which is specifically as follows: the limiting plate 22 and the insulating plastic seat 2 are integrally formed by injection molding, and are formed in the second accommodating cavity 21 in the injection molding stage, so that the problems are well solved.

Finally, it should be noted that, after the metal conductive seat 1 is inserted into the insulating plastic seat 2, the metal conductive seat and the insulating plastic seat have the relative displacement and play phenomenon along the central axis and the relative rotation movement along the central axis, which also affect the reliability of the Fakra connector assembly, and further may cause the electrical connection failure and affect the reliability and stability of the signal transmission. In view of this, as a further optimization of the present invention, a circumferential limit flange 1124 may extend outward around the outer sidewall of the insertion column 112 just behind the second axial limit flange 1123. The number of the circumferential position-limiting flanges 1124 is set to be plural, and the circumferential position-limiting flanges are circumferentially and evenly distributed around the central axis of the insertion column 112, and an avoidance groove 1125 (as shown in fig. 6 and 7) is formed between two adjacent circumferential position-limiting flanges 1124. After the metal conductive seat 1 is inserted, engaged and butted against the insulating plastic seat 2, the engaging protrusion 2231 is disposed in the avoiding groove 1125 (as shown in fig. 3 and 5). Therefore, after the metal conductive seat 1 is inserted into the insulating plastic seat 2 to complete the insertion process, the clamping protrusion 2231 and the avoiding groove 1125 are mutually matched for use, so that the metal conductive seat 1 is effectively prevented from rotating relative to the insulating plastic seat 2, and a reliable and stable assembly relationship between the metal conductive seat and the insulating plastic seat is ensured.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A Fakra connector comprises a metal conductive seat and an insulating plastic seat; the metal conductive seat comprises a metal conductive piece, an insulating column and a wiring terminal; the metal conductive piece comprises a conductive shell body and an inserting column; the plug column is formed by continuously extending the left side wall of the conductive shell body leftwards, and a first accommodating cavity is formed in the plug column; the wiring terminal penetrates through and is fixed in the insulating column, and the wiring terminal is integrally placed in the first accommodating cavity; the metal conductive seat is in inserted joint with the insulating plastic seat along the direction from right to left by means of the inserting column, correspondingly, a second accommodating cavity is formed in the insulating plastic seat and used for accommodating the inserting column, and the metal conductive seat is characterized in that a limiting plate is arranged in the insulating plastic seat; the limiting plate is internally arranged and fixed in the second accommodating cavity, and is provided with a mounting through hole for the insertion column to pass through; the limiting plate is also provided with an arc-shaped clamping section which is formed by extending the side wall of the mounting through hole along the radial direction of the mounting through hole; a plurality of clamping arms continuously extend rightwards along the right side wall of the limiting plate and are circumferentially and uniformly distributed around the central axis of the mounting through hole; a clamping bulge is arranged at the free end of the clamping arm and extends along the radial direction of the limiting plate; the outer side wall of the surrounding inserting column is outwards extended with a first axial limiting flange matched with the arc-shaped clamping section and a second axial limiting flange matched with the clamping protrusion, and the first axial limiting flange and the second axial limiting flange are sequentially arranged along the left-to-right direction and are parallel to each other.

2. The Fakra connector of claim 1, wherein assuming the first axial stop flange outer diameter is set to D1 and the arcuate clamping section arc diameter is set to D2, 0.1mm ≦ D1-D2 ≦ 0.4 mm.

3. The Fakra connector of claim 2, wherein a first guide ramp is provided on the first axial position-defining flange, which is chamfered to the right from a left sidewall of the first axial position-defining flange; a second guide inclined plane is arranged on the second axial limiting flange and is formed by obliquely cutting the left side wall of the second axial limiting flange rightwards; a third guide inclined plane is arranged on the arc-shaped clamping section and is formed by obliquely cutting the right side wall of the arc-shaped clamping section leftwards; and a fourth guide inclined plane is arranged on the clamping protrusion and is formed by obliquely cutting the right side wall of the clamping protrusion leftwards.

4. The Fakra connector of claim 1, wherein the limiting plate is integrally injection molded with the insulating plastic seat.

5. The Fakra connector of any of claims 1-4, wherein a circumferential stop flange extends outwardly around an outer sidewall of the plug post directly behind the second axial stop flange; the number of the circumferential limiting flanges is set to be a plurality, the circumferential limiting flanges are uniformly distributed around the central axis of the inserting column in the circumferential direction, and an avoiding groove is formed between every two adjacent circumferential limiting flanges; when the metal conductive seat is inserted, jointed and butted relative to the insulating plastic seat, the clamping protrusion is arranged in the avoiding groove.