CN111403972A - A Fakra connector - Google Patents

Abstract

The invention relates to a Fakra connector, which comprises a metal conductive seat and an insulating plastic seat. The metal conductive seat includes a conductive shell body and a plug-in post. A limiting plate is arranged in the insulating plastic seat. A mounting through hole is opened on the limit plate for the insertion post to pass through. An arc-shaped clamping segment is also arranged on the limiting plate, which is formed by extending the side wall of the installation through hole along its radial direction. A clamping arm is extended along the side wall of the limiting plate, and a clamping protrusion is arranged on it. Extending around the outer side wall of the plug-in column are a first axial limiting flange adapted to the arc-shaped clamping segment and a second axial limiting flange adapted to the clamping projection. In this way, a double snap connection relationship is formed between the metal conductive seat and the insulating plastic seat, thereby ensuring the reliability of the insertion of the metal conductive seat and the insulating plastic seat, and ensuring that the Fakra connector is compatible with it. reliability of the electrical connection of the components.

Description

A Fakra connector

technical field

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

Background technique

Fakra connector is a coaxial signal transmission connector. It was mainly used in the transmission of radio frequency signals at first. After the coaxial and LVDS signal conversion C appeared in the market, the application scope was expanded to the field of video signal transmission. It is widely used in the field of automotive electronic entertainment systems. It is an important part of signal transmission between in-vehicle multimedia devices. Fakra connectors have the characteristics of good shielding and signal stability, fast transmission rate, high cost performance and small size. Product use: vehicle navigation, vehicle electronic instrumentation, 360 panoramic system, vehicle automatic driving system, etc.

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 to transmit signals. However, in the prior art, there is no effective axial limiting function between the metal conductive seat and the insulating plastic seat. As a result, in the actual application process, when an external force is applied, the metal conductive seat is relatively opposite to the insulating plastic seat. The seat is prone to axial displacement, and in severe cases, the electrical connection between the wiring terminals in the metal conductive seat, the plug-in post and the matching components will fail, thereby affecting the reliability and stability of signal transmission. Therefore, there is an urgent need for technicians to solve the above problems.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a Fakra connector with a simple structure design, which is convenient for manufacturing and molding, and ensures that the metal conductive seat has high connection stability relative to the insulating plastic seat, and prevents the occurrence of relative displacement.

In order to solve the above technical problems, the present invention relates to a Fakra connector, which includes a metal conductive seat and an insulating plastic seat. Wherein, the metal conductive seat includes a metal conductive member, an insulating column and a connection terminal. The metal conductive member includes a conductive shell body and a plug-in post. The plug-in column is formed by extending the left side wall of the conductive shell body to the left, and a first accommodating cavity is arranged in it. The connection terminal is penetrated and fixed in the insulating column, and is integrally placed in the first accommodating cavity. The metal conductive seat is inserted and connected to the above-mentioned insulating plastic seat along the right-to-left direction by means of the inserting post. Correspondingly, a second accommodating cavity is provided in the insulating plastic seat for inserting the inserting post. A limit plate is arranged in the insulating plastic seat. The limiting plate is built-in and fixed in the second accommodating cavity, and an installation through hole is opened on the limiting plate for the insertion post to pass through. An arc-shaped clamping segment is also arranged on the limiting plate, which is formed by extending the side wall of the installation through hole along its radial direction. A plurality of clamping arms continue to extend to the right along the right side wall of the limiting plate, and are uniformly distributed in the circumferential direction around the central axis of the installation through hole. The free end of the clamping arm is provided with a clamping protrusion extending along the radial direction of the limiting plate. Around the outer side wall of the plug-in column, a first axial limit flange adapted to the above-mentioned arc-shaped clamping segment and a second axial limit flange adapted to the above-mentioned clamping protrusions extend outward. They are arranged in order from left to right and parallel to each other.

As a further improvement of the technical solution of the present invention, it is assumed that the outer diameter of the first axial limiting flange is set to D1, and the arc diameter of the arc-shaped clamping segment is set to D2, then 0.1mm≤D1-D2≤0.4mm .

As a further improvement of the technical solution of the present invention, a first guide slope is provided on the first axial limiting flange, which is formed by chamfering the left side wall of the first axial limiting flange to the right. A second guide inclined surface is provided on the second axial limiting flange, which is formed by chamfering the left side wall of the second axial limiting flange to the right. A third guiding inclined surface is provided on the arc-shaped clamping section, which is formed by chamfering the right side wall of the arc-shaped clamping section to the left. A fourth guide slope is provided on the snap-on protrusion, which is formed by chamfering the right side wall of the snap-on protrusion to the left.

As a further improvement of the technical solution of the present invention, the limiting plate and the insulating plastic seat are integrally injection-molded.

As a further improvement of the technical solution of the present invention, a circumferential limit flange is extended outwards right behind the second axial limit flange and surrounds the outer side wall of the plug-in column. The number of the circumferential limit flanges is set in multiples, which are uniformly distributed in the circumferential direction around the central axis of the plug-in column, and an avoidance groove is formed between two adjacent circumferential limit flanges. After the metal conductive seat is mated with the insulating plastic seat, the snap-fit protrusion is built into the avoidance groove.

Compared with the Fakra connector of the traditional design structure, in the technical solution disclosed in the present invention, an axial limit part is added between the metal conductive seat and the insulating plastic seat, and the metal conductive seat is inserted relative to the insulating plastic seat. During the mating process, the side wall of the first axial limit flange squeezes the arc-shaped clipping section, so that an elastic retraction occurs until it completely crosses the arc-shaped clipping section to form the first clip. At the same time, the snap connection protrusion is hooked on the side wall of the second axial limit flange to form a second snap connection. In this way, the reliability of the metal conductive seat and the insulating plastic seat is effectively ensured, the relative axial displacement of the two is prevented, and the reliability of the electrical connection between the Fakra connector and the matched components is ensured. , thereby ensuring the stability of the signal transmission process.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic three-dimensional assembly diagram of the Fakra connector in the present invention.

Figure 2 is an exploded schematic view of the Fakra connector in the present invention.

FIG. 3 is a plan view of FIG. 1 .

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3 .

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3 .

FIG. 6 is a perspective view of the 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 the insulating plastic seat in the Fakra connector of the present invention.

FIG. 9 is a plan view of FIG. 8 .

FIG. 10 is a C-C cross-sectional view of FIG. 9 .

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

1-metal conductive seat; 11-metal conductive member; 111-conductive shell body; 112-plug column; 1121-first accommodation cavity; 1122-first axial limit flange; 11221-first guide slope; 1123 - The second axial limit flange; 11231 - the second guide slope; 1124 - the circumferential limit flange; 1125 - the avoidance groove; 12 - the insulating column; 22-limiting plate; 221-installation through hole; 222-arc clipping section; 2221-third guiding slope; 223- clipping arm; 2231- clipping protrusion; 22311-fourth guide bevel.

Detailed ways

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, It is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

Below in conjunction with specific embodiments, the content of the present invention will be further described in detail. Figures 1 and 2 respectively show the three-dimensional assembly schematic diagram and the exploded schematic diagram of the Fakra connector in the present invention. Insulated plastic seat 2 is formed. The metal conductive base 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-in column 112 . The plug-in post 112 is formed by extending the left side wall of the conductive shell body 111 to the left, and a first accommodating cavity 1121 is provided therein. The connection terminal 13 is penetrated and fixed in the above-mentioned insulating column 12 , and is integrally placed in the above-mentioned first accommodating cavity 1121 . The metal conductive base 1 is inserted and connected to the above-mentioned insulating plastic base 3 by means of the plug-in posts 112 along the right-to-left direction. Insertion post 112 . In addition, a limiting plate 22 is arranged in the insulating plastic seat 2 . The limiting plate 22 is built-in and fixed in the above-mentioned second accommodating cavity 31 , and a mounting through hole 221 is formed thereon for the insertion post 112 to pass through. The limiting plate 22 is also provided with an arc-shaped clamping segment 222, which is formed by extending the side wall of the mounting through hole 221 along its radial direction. A plurality of clamping arms 223 continue to extend to the right along the right side wall of the limiting plate 22 , and are uniformly distributed in the circumferential direction around the central axis of the installation through hole 221 . A latching protrusion 2231 is provided at the free end of the latching arm 223 and extends along the radial direction of the limiting plate 22 . Around the outer side wall of the plug-in column 112 , a first axial limiting flange 1122 adapted to the above-mentioned arc-shaped clamping segment 222 and a second axial limit flange 1122 adapted to the above-mentioned clamping projection 2231 extend outward. The limiting flanges 1123 are arranged in sequence from left to right, and are parallel to each other (as shown in FIGS. 3 , 4 , and 6-11 ). In this way, the reliability of the insertion of the metal conductive seat 1 and the insulating plastic seat 2 is effectively ensured, the relative axial displacement of the two is prevented, and the electrical connection between the Fakra connector and the matched components is ensured. reliability, thus ensuring the stable progress of the signal transmission process.

The working principle of the above Fakra connector is roughly as follows: in the process of mating and butt-jointing the metal conductive base 1 with respect to the insulating plastic base 2, the upper inserting post 112 moves along the central axis of the edge plastic base 2, and then Inserted into the installation through hole 221, and then the insertion column 112 continues to perform displacement movement, so that the side wall of the first axial limiting flange 1122 thereon squeezes the arc-shaped clipping section 222, so that the arc-shaped clipping The segment 222 is elastically retracted until it completely crosses the arc-shaped snap-on segment 222 to form the first snap connection. At the same time, the snap-on protrusion 2231 on the snap-on arm 223 is hooked on the second shaft To the side wall of the limiting flange 1123 to form a second snap connection, so as to realize the reliable insertion of the metal conductive seat 1 relative to the insulating plastic seat 2, and prevent the occurrence of "disengagement" phenomenon.

Generally speaking, when the first axial limiting flange 1122 has an improper dimensional matching relationship with the arc-shaped snap-on segment 222, it is easy to cause difficulty in inserting the plug-in post 112 or failure of snap-fit connection. , it is necessary to strictly control the size of the first axial limiting flange 1122 and the size of the arc-shaped snap-on segment 222 that matches it. Therefore, it has been verified by long-term experimental results that when the first axial limit flange 1122 and the arc-shaped clamping segment 222 have the following dimensional relationship, the above-mentioned problems can be better solved, and the details are as follows: Assuming that the first axial limit The outer diameter of the position flange 1122 is set as D1, and the arc diameter of the arc-shaped clipping section 222 is set as D2, then 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 post 112 relative to the limiting plate 22, a first guiding slope 11221 may also be provided on the first axial limiting flange 1122, which is limited by the first axial limit. The left side wall of the position flange 1122 is chamfered to the right. A second guide slope 11231 is provided on the second axial limiting flange 1123 , which is formed by chamfering the left side wall of the second axial limiting flange 1123 to the right (as shown in FIG. 7 ). A third guiding inclined surface 2221 is provided on the arc-shaped clamping section 222, which is formed by chamfering the right side wall of the arc-shaped clamping section 222 to the left. A fourth guide slope 22311 is provided on the snap-on protrusion 2231, which is formed by chamfering the right side wall of the snap-on protrusion 2231 to the left (as shown in FIG. 11 ).

Generally speaking, considering the manufacturing process, the limiting plate 22 and the insulating plastic seat 2 can be separately formed, and then the limiting plate is fixed in the second accommodating cavity 21 of the insulating plastic seat 2 by means of welding. However, , it is cumbersome to actually perform the above operation, and the limiting plate 22 is easily detached from the inner side wall of the second accommodating cavity 21, thereby affecting its practical application effect. In view of this, in this embodiment, a kind of The molding method is as follows: the limiting plate 22 and the insulating plastic seat 2 are integrally injection-molded, and are molded into the second accommodating cavity 21 in the injection molding stage, so as to better solve the above problems.

Finally, it should be noted here that, after the metal conductive seat 1 is inserted into the insulating plastic seat 2, there is not only the above-mentioned relative displacement and movement along the central axis between the two, but also the phenomenon of relative displacement along the central axis. The phenomenon of relative rotation of the central axis will also affect the reliability of the Fakra connector assembly, which may lead to electrical connection failure, affecting the reliability and stability of signal transmission. In view of this, as a further optimization of the technical solution of the present invention, a circumferential limiting flange 1124 may also be extended outwardly from the outer side wall of the insertion column 112 directly behind the second axial limiting flange 1123 . The number of the circumferential limit flanges 1124 is set to be multiple, and the circumferential direction is evenly distributed around the central axis of the insertion column 112, and an avoidance groove 1125 is formed between two adjacent circumferential limit flanges 1124 (as shown in FIG. 6 , 7). After the metal conductive base 1 is inserted and connected to the insulating plastic base 2, the above-mentioned snap-on protrusions 2231 are being built into the avoidance grooves 1125 (as shown in FIGS. 3 and 5). In this way, when the metal conductive seat 1 is inserted into the insulating plastic seat 2 and the insertion process is completed, the snap-on protrusion 2231 and the avoidance groove 1125 cooperate with each other, thereby effectively preventing the metal conductive seat 1 from being inserted into the insulating plastic seat. 2 The phenomenon of rotation occurs to ensure a reliable and stable assembly relationship between the two.

The above description of the disclosed embodiments enables 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 implemented in 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 (5)

1. A Fakra connector, comprising a metal conductive seat and an insulating plastic seat; wherein, the metal conductive seat includes a metal conductive member, an insulating column and a terminal; the metal conductive member includes a conductive shell body and a plug-in column; The plug-in post is formed by extending the left side wall of the conductive shell body to the left, and a first accommodating cavity is arranged in it; into the first accommodating cavity; the metal conductive seat is inserted and butted with the insulating plastic seat along the right-to-left direction by means of the plug-in posts, and correspondingly, the insulating plastic seat is provided in the insulating plastic seat. There is a second accommodating cavity for inserting the plug-in post, and it is characterized in that a limit plate is arranged in the insulating plastic seat; the limit board is built-in and fixed in the second accommodating cavity, And an installation through hole is opened on it for the insertion column to pass through; an arc-shaped clamping section is also arranged on the limit plate, which is formed by the side wall of the installation through hole extending along its radial direction. ; A plurality of clamping arms continue to extend to the right along the right side wall of the limit plate, and are uniformly distributed around the central axis of the installation through hole; a clamping arm is provided at the free end of the clamping arm a first axial limit flange adapted to the arc-shaped snap-connection segment extends outward around the outer side wall of the plug-in column . The second axial limiting flanges adapted to the snap-fit protrusions are sequentially arranged along the left-to-right direction and are parallel to each other. 2 . The Fakra connector according to claim 1 , wherein, assuming that the outer diameter of the first axial limiting flange is set to D1 , the arc diameter of the arc-shaped clipping segment is set to be 2 . D2, then 0.1mm≤D1-D2≤0.4mm. 3 . The Fakra connector according to claim 2 , wherein a first guide slope is provided on the first axial limiting flange, which is formed by the left side of the first axial limiting flange. 4 . The side wall is chamfered to the right; the second axial limit flange is provided with a second guide slope, which is chamfered to the right from the left side wall of the second axial limit flange A third guiding inclined surface is provided on the arc-shaped clamping segment, which is formed by chamfering the right side wall of the arc-shaped clamping segment to the left; a fourth guiding surface is provided on the clamping projection The inclined plane is formed by chamfering the right side wall of the snap-fit protrusion to the left. 4 . The Fakra connector according to claim 1 , wherein the limiting plate and the insulating plastic seat are integrally injection-molded. 5 . 5. The Fakra connector according to any one of claims 1-4, characterized in that, the outer side wall surrounding the plug-in post extends outward right behind the second axial limiting flange Circumferential limit flanges; the number of the circumferential limit flanges is set to be multiple, and the circumferential limit is evenly distributed around the central axis of the insertion column, and between two adjacent circumferential limit flanges An avoidance groove is formed; when the metal conductive seat is inserted and connected to the insulating plastic seat, the snap-fit protrusion is built into the avoidance groove.

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