A Fakra connector

Abstract

The present invention relates to a Fakra connector, comprising a metal conductive seat and an insulating plastic seat. The metal conductive seat comprises a conductive shell body and a plug-in column. A limit plate is arranged in the insulating plastic seat. A mounting through hole is provided on the limit plate for the plug-in 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 mounting through hole extending along its radial direction. A clamping arm continues to extend along the side wall of the limit plate, and a clamping protrusion is arranged on it. A first axial limit flange adapted to the arc-shaped clamping section and a second axial limit flange adapted to the clamping protrusion extend around the outer side wall of the plug-in column. 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 plug-in connection between the metal conductive seat and the insulating plastic seat, and ensuring the reliability of the electrical connection between the Fakra connector and the components adapted thereto.

Description

Technical Field

[0001] The invention relates to the technical field of connector manufacturing, in particular to a Fakra connector. Background Art

[0002] Fakra connectors are coaxial signal transmission connectors. Initially, they were mainly used for the transmission of radio frequency signals. After the emergence of coaxial and LVDS signal converters in the market, their application range has been expanded to the field of video signal transmission. They are widely used in the field of automotive electronic entertainment systems and are important components for signal transmission between in-vehicle multimedia devices. Fakra connectors have good shielding and signal stability, fast transmission rate, high cost performance, and small size. Product uses: in-vehicle navigation, in-vehicle electronic instruments, 360 panoramic systems, in-vehicle automatic driving systems, etc.

[0003] 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 a lack of an effective axial limit function between the metal conductive seat and the insulating plastic seat. As a result, in actual application, when subjected to external force, the metal conductive seat is prone to axial displacement relative to the insulating plastic seat. In severe cases, it will cause the electrical connection between the terminal block and the plug-in column in the metal conductive seat and the matching element to fail, thereby affecting the reliability and stability of signal transmission. Therefore, it is urgent for technicians to solve the above problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a Fakra connector which has a simple structural design, is easy to manufacture and mold, ensures that the metal conductive seat has high connection stability relative to the insulating plastic seat, and prevents the relative displacement phenomenon from occurring.

[0005] In order to solve the above technical problems, the present invention relates to a Fakra connector, including a metal conductive seat and an insulating plastic seat. The metal conductive seat includes a metal conductive part, an insulating column and a terminal. The metal conductive part includes a conductive shell body and a plug-in column. The plug-in column is formed by the left side wall of the conductive shell body continuing to extend to the left, and a first accommodating cavity is arranged therein. The terminal is inserted and fixed in the insulating column and is placed in the first accommodating cavity as a whole. The metal conductive seat is plugged and docked with the insulating plastic seat from right to left by means of the plug-in column. Accordingly, a second accommodating cavity is arranged in the insulating plastic seat for placing the plug-in column. A limiting plate is arranged in the insulating plastic seat. The limiting plate is built-in and fixed in the second accommodating cavity, and a mounting through hole is opened on it for the plug-in column to pass through. An arc-shaped clamping section is also arranged on the limiting plate, which is formed by the side wall of the mounting 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 limiting plate, and are evenly distributed circumferentially around the central axis of the mounting through hole. A clamping protrusion is provided at the free end of the clamping arm and extends along the radial direction of the limiting plate. A first axial limiting flange adapted to the arc-shaped clamping section and a second axial limiting flange adapted to the clamping protrusion extend outwardly around the outer side wall of the plug-in column, which are arranged in sequence from left to right and are parallel to each other.

[0006] As a further improvement of the technical solution of the present invention, the diameter of the first axial limiting flange is D1, and the arc diameter of the arc-shaped clamping section is D2, then 0.1mm≤D1-D2≤0.4mm.

[0007] As a further improvement of the technical solution of the present invention, a first guiding bevel is provided on the first axial limit flange, which is formed by beveling the left side wall of the first axial limit flange to the right. A second guiding bevel is provided on the second axial limit flange, which is formed by beveling the left side wall of the second axial limit flange to the right. A third guiding bevel is provided on the arc-shaped clamping section, which is formed by beveling the right side wall of the arc-shaped clamping section to the left. A fourth guiding bevel is provided on the clamping protrusion, which is formed by beveling the right side wall of the clamping protrusion to the left.

[0008] As a further improvement of the technical solution of the present invention, the limiting plate and the insulating plastic seat are integrally injection molded.

[0009] As a further improvement of the technical solution of the present invention, a circumferential limit flange extends outwardly around the outer wall of the plug-in column just behind the second axial limit flange. The number of circumferential limit flanges is set to be multiple, and they are evenly distributed circumferentially around the central axis of the plug-in column, and an avoidance groove is formed between two adjacent circumferential limit flanges. When the metal conductive seat is plugged and docked with the insulating plastic seat, the clamping protrusion is built into the avoidance groove.

[0010] Compared with the Fakra connector of the traditional design structure, in the technical solution disclosed in the present invention, an axial limit portion is added between the metal conductive seat and the insulating plastic seat, and in the process of plugging and docking the metal conductive seat relative to the insulating plastic seat, the side wall of the first axial limit flange squeezes the arc-shaped clamping section, causing elastic retraction movement until it completely crosses the arc-shaped clamping section to form a first snap connection, and at the same time, the clamping 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 plug-in connection between the metal conductive seat and the insulating plastic seat is effectively ensured, the relative axial displacement between the two is prevented, the reliability of the electrical connection between the Fakra connector and the components adapted thereto is ensured, and the stable progress of the signal transmission process is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a three-dimensional assembly schematic diagram of the Fakra connector in the present invention.

[0013] Figure 2 It is an exploded schematic diagram of the Fakra connector in the present invention.

[0014] Figure 3 yes Figure 1 Top view of the .

[0015] Figure 4 yes Figure 3 AA section view.

[0016] Figure 5 yes Figure 3 BB cross-sectional view.

[0017] Figure 6 It is a three-dimensional schematic diagram of the metal conductive part in the Fakra connector of the present invention.

[0018] Figure 7 yes Figure 6 Side view of.

[0019] Figure 8 It is a three-dimensional schematic diagram of an insulating plastic seat in a Fakra connector of the present invention from one viewing angle.

[0020] Fig. 9 yes Figure 8 Top view of the .

[0021] Fig.10 yes Fig. 9 CC cross-sectional view.

[0022] Fig.11 It is a three-dimensional schematic diagram of another viewing angle of the insulating plastic seat in the Fakra connector of the present invention.

[0023] 1-metal conductive seat; 11-metal conductive part; 111-conductive shell body; 112-plug-in column; 1121-first accommodating cavity; 1122-first axial limiting flange; 11221-first guiding slope; 1123-second axial limiting flange; 11231-second guiding slope; 1124-circumferential limiting flange; 1125-avoidance groove; 12-insulating column; 13-connecting terminal; 2-insulating plastic seat; 21-second accommodating cavity; 22-limiting plate; 221-mounting through hole; 222-arc-shaped clamping section; 2221-third guiding slope; 223-clamping arm; 2231-clamping protrusion; 22311-fourth guiding slope. DETAILED DESCRIPTION

[0024] In the description of the present invention, it is necessary to understand that the terms "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] The present invention will be further described in detail below with reference to specific embodiments. Figure 1 , Figure 2The three-dimensional assembly schematic diagram and the exploded schematic diagram of the Fakra connector in the present invention are respectively shown. It can be seen that it is mainly composed of a metal conductive seat 1 and an insulating plastic seat 2. Among them, the metal conductive seat 1 includes a metal conductive part 11, an insulating column 12 and a terminal 13. The metal conductive part 11 includes a conductive shell body 111 and a plug-in column 112. The plug-in column 112 is formed by the left side wall of the conductive shell body 111 continuing to extend to the left, and a first accommodating cavity 1121 is arranged therein. The terminal 13 is penetrated and fixed in the above-mentioned insulating column 12, and is placed in the above-mentioned first accommodating cavity 1121 as a whole. The metal conductive seat 1 is plugged and docked with the above-mentioned insulating plastic seat 3 along the right to left direction by means of the plug-in column 112. Accordingly, a second accommodating cavity 31 is arranged in the insulating plastic seat 3 for placing the above-mentioned plug-in column 112. In addition, a limit plate 22 is arranged in the insulating plastic seat 2. The limiting plate 22 is built into and fixed in the above-mentioned second accommodating cavity 31, and a mounting through hole 221 is opened on it for the plug-in column 112 to pass through. An arc-shaped clamping section 222 is also provided on the limiting plate 22, which is formed by the side wall of the mounting through hole 221 extending radially. A plurality of clamping arms 223 continue to extend to the right along the right side wall of the limiting plate 22, and are circumferentially evenly distributed around the central axis of the mounting through hole 221. A clamping protrusion 2231 is provided at the free end of the clamping arm 223, and extends radially along the limiting plate 22. A first axial limiting flange 1122 adapted to the above-mentioned arc-shaped clamping section 222 and a second axial limiting flange 1123 adapted to the above-mentioned clamping protrusion 2231 extend outwardly from the outer side wall around the plug-in column 112, which are arranged in sequence from left to right and are parallel to each other (such as Figure 3 , 4 , 6-11). In this way, the reliability of the plug-in connection between the metal conductive seat 1 and the insulating plastic seat 2 is effectively ensured, the relative axial displacement between the two is prevented, the reliability of the electrical connection between the Fakra connector and the components adapted thereto is ensured, and the stability of the signal transmission process is ensured.

[0026] The working principle of the above-mentioned Fakra connector is roughly as follows: during the process of plugging and docking the metal conductive seat 1 relative to the insulating plastic seat 2, the plug-in column 112 thereon is displaced along the central axis of the edge plastic female seat 2, and then inserted into the mounting through hole 221, and then the plug-in column 112 continues to be displaced, so that the side wall of the first axial limiting flange 1122 thereon squeezes the arc-shaped clamping section 222, causing the arc-shaped clamping section 222 to elastically retreat until it completely crosses the arc-shaped clamping section 222 to form a first snap connection. At the same time, the clamping protrusion 2231 on the clamping arm 223 is hooked on the side wall of the second axial limiting flange 1123 to form a second snap connection, thereby realizing the reliable plugging of the metal conductive seat 1 relative to the insulating plastic seat 2 and preventing the "disengagement" phenomenon from occurring.

[0027] Generally speaking, when the first axial limit flange 1122 has an inappropriate size matching relationship with the arc-shaped snap-in section 222, it is very easy to cause difficulty in inserting the plug-in column 112 or the occurrence of snap-in connection failure. Therefore, it is necessary to strictly control the size of the first axial limit flange 1122 and the size of the arc-shaped snap-in section 222 that matches it. Therefore, after a long period of experimental results, it is verified that the above problem can be better solved when the first axial limit flange 1122 and the arc-shaped snap-in section 222 have the following size relationship, as follows: The diameter of the first axial limit flange 1122 is D1, and the arc diameter of the arc-shaped snap-in section 222 is D2, then 0.1mm≤D1-D2≤0.4mm (such as Figure 7 , 10 ).

[0028] In order to reduce the difficulty of inserting and assembling the plug-in column 112 relative to the limiting plate 22, a first guiding inclined surface 11221 can be provided on the first axial limiting flange 1122, which is formed by beveling the left side wall of the first axial limiting flange 1122 to the right. A second guiding inclined surface 11231 is provided on the second axial limiting flange 1123, which is formed by beveling the left side wall of the second axial limiting flange 1123 to the right (such as Figure 7 A third guiding slope 2221 is provided on the arc-shaped clamping section 222, which is formed by cutting the right side wall of the arc-shaped clamping section 222 obliquely to the left. A fourth guiding slope 22311 is provided on the clamping protrusion 2231, which is formed by cutting the right side wall of the clamping protrusion 2231 obliquely to the left (as shown in Fig.11 ).

[0029] Generally speaking, from the perspective of manufacturing process, the limit plate 22 and the insulating plastic seat 2 can be molded separately, and then the limit plate can be fixed to the second accommodating cavity 21 of the insulating plastic seat 2 by welding. However, this is more cumbersome when actually performing the above operation, and the limit plate 22 is very easy to fall off from the inner wall of the second accommodating cavity 21, thereby affecting its actual application effect. In view of this, a molding method is recommended in this embodiment, which is as follows: the limit plate 22 and the insulating plastic seat 2 are integrally injection molded, and are molded in the second accommodating cavity 21 during the injection molding stage, thereby better solving the above problem.

[0030] Finally, it should be noted that when the metal conductive seat 1 is plugged in with the insulating plastic seat 2, there is not only the above-mentioned relative displacement along the central axis, but also relative rotation along the central axis, which will also affect the reliability of the Fakra connector assembly, and thus may very likely 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 be extended outwardly from the outer side wall of the plug-in column 112 and directly behind the second axial limiting flange 1123. The number of circumferential limiting flanges 1124 is set to be multiple, which are evenly distributed circumferentially around the central axis of the plug-in column 112, and an avoidance groove 1125 (such as Figure 6 , 7 When the metal conductive seat 1 is plugged and docked with the insulating plastic seat 2, the above-mentioned clamping protrusion 2231 is built into the avoidance groove 1125 (as shown in Figure 3 , 5 As shown in ). In this way, when the metal conductive seat 1 is inserted into the insulating plastic seat 2, the engaging protrusion 2231 and the avoiding groove 1125 cooperate with each other, thereby effectively preventing the metal conductive seat 1 from rotating relative to the insulating plastic seat 2, ensuring a reliable and stable assembly relationship between the two.

[0031] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A Fakra connector, comprising a metal conductive seat and an insulating plastic seat; wherein: The metal conductive seat includes a metal conductive part, an insulating column and a terminal; the metal conductive part includes a conductive shell body and a plug-in column; the plug-in column is formed by the left side wall of the conductive shell body continuing to extend to the left, and a first accommodating cavity is arranged therein; the terminal is passed through and fixed in the insulating column, and is placed in the first accommodating cavity as a whole; the metal conductive seat is plugged and docked with the insulating plastic seat along the right to left direction by means of the plug-in column, and accordingly, a second accommodating cavity is arranged in the insulating plastic seat for placing the plug-in column, characterized in that a limit plate is arranged in the insulating plastic seat; the limit plate is built-in and fixed in the The second accommodating cavity is provided with a mounting through hole for the plug-in column to pass through; an arc-shaped clamping section is also provided on the limiting plate, which is formed by the radial extension of the side wall of the mounting through hole; a plurality of clamping arms continue to extend to the right along the right side wall of the limiting plate, and are circumferentially evenly distributed around the central axis of the mounting through hole; a clamping protrusion is provided at the free end of the clamping arm, and extends along the radial direction of the limiting plate; a first axial limiting flange adapted to the arc-shaped clamping section and a second axial limiting flange adapted to the clamping protrusion extend outwardly around the outer side wall of the plug-in column, and are arranged in sequence from left to right and are parallel to each other.

2. The Fakra connector according to claim 1, characterized in that: The diameter of the first axial limiting flange is D1, and the arc diameter of the arc-shaped clamping section is D2, then 0.1 mm≤D1-D2≤0.4 mm.

3. The Fakra connector according to claim 2, characterized in that: A first guide bevel is arranged on the first axial limit flange, which is formed by bevelling the left side wall of the first axial limit flange to the right; a second guide bevel is arranged on the second axial limit flange, which is formed by bevelling the left side wall of the second axial limit flange to the right; a third guide bevel is arranged on the arc-shaped clamping section, which is formed by bevelling the right side wall of the arc-shaped clamping section to the left; a fourth guide bevel is arranged on the clamping protrusion, which is formed by bevelling the right side wall of the clamping protrusion to the left.

4. The Fakra connector according to claim 1, characterized in that: The limiting plate and the insulating plastic seat are integrally injection-molded.

5. The Fakra connector according to any one of claims 1 to 4, characterized in that: A circumferential limit flange extends outwardly from the outer side wall of the plug-in column directly behind the second axial limit flange; the number of the circumferential limit flanges is set to be multiple, which are evenly distributed circumferentially around the central axis of the plug-in column, and an avoidance groove is formed between two adjacent circumferential limit flanges; when the metal conductive seat is plugged and docked with the insulating plastic seat, the clamping protrusion is directly built into the avoidance groove.

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