An integrated FAKRA board-end connector

Abstract

This utility model discloses an integrated FAKRA board-end connector, comprising: an outer conductor with multiple solder pins at its bottom; a center conductor passing through the outer conductor and forming an annular gap with the outer conductor; and a plastic shell, which is integrally formed with the outer conductor and the center conductor by in-mold injection molding. The insulator integrally molded into the plastic shell fills the annular gap to fix the center conductor and the outer conductor, and the pins of the center conductor extend beyond the lower end face of the insulator. This utility model has only three parts, which is relatively few. Furthermore, the plastic shell is integrally formed with the outer conductor and the center conductor by in-mold injection molding, eliminating the need for assembly and reducing production assembly steps, thereby accelerating the entire connector manufacturing process and reducing manufacturing costs to a certain extent. Simultaneously, the structure between the outer conductor, the center conductor, and the plastic shell improves the holding force of the outer conductor and the center conductor, preventing pin slippage during use and improving product reliability.

Description

Technical fields:

[0001] This utility model relates to the field of connector product technology, and specifically to an integrated FAKRA board-end connector. Background technology:

[0002] Connectors are components that electronic engineers frequently encounter. Their function is to bridge gaps in a circuit or between isolated circuits, allowing current to flow and enabling the circuit to perform its intended function.

[0003] FAKRA is a radio frequency connector standard widely used in the automotive electronics field. It is designed for high-frequency signal transmission and is especially suitable for automotive antennas, GPS, in-vehicle entertainment systems and other scenarios. Its name comes from the standardized interface specification developed by the Federation of the German Automotive Industry (FAKRA). It features miniaturization, high frequency, vibration resistance and anti-misfitting. Therefore, FAKRA connectors are widely used in new energy vehicles.

[0004] Chinese utility model patent application number 202521383697.5 discloses a Mini Fakra connector, including a center pin, a first insulator, a second insulator, an outer conductor, and a shell. The first and second insulators are sequentially and spaced apart outside the center pin, the center pin is located in the outer conductor, and the shell is fitted outside the outer conductor. The outer conductor has a first fixing cavity for fixing the first insulator. The first fixing cavity is a two-section structure including a front section and a rear section, with the front section being smaller and the rear section being larger. The first insulator is inserted into the front section from the rear section of the first fixing cavity in a forward direction. The outer periphery of the first insulator is provided with a rib extending in the front-rear direction. The rib is used to abut against the inner wall of the front section to fix the first insulator. The rear end of the rib is provided with a flange extending circumferentially along the first insulator.

[0005] The Mini Fakra connector has a relatively large number of parts, and these parts are fixed together by assembly. Specifically, the first insulator and the second insulator are sequentially and alternately fitted over the center pin, the center pin is then placed in the outer conductor, and finally the outer shell is fitted over the outer conductor. The assembly is quite complicated, and the sealing performance is not ideal, which affects the product quality.

[0006] In view of the above, the inventors propose the following technical solution. Utility Model Content:

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integrated FAKRA board-end connector.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The integrated FAKRA board-end connector includes: an outer conductor with multiple solder feet at its bottom; a center conductor that passes through the outer conductor and forms an annular gap with the outer conductor, the pins of the center conductor extending out of the bottom of the outer conductor; and a plastic shell that is integrally formed with the outer conductor and the center conductor by in-mold injection molding, wherein the insulator integrally formed by the plastic shell fills the annular gap to fix the center conductor and the outer conductor, and the pins of the center conductor extending out of the lower end face of the insulator.

[0009] Furthermore, in the above technical solution, the outer conductor is die-cast from a metal material.

[0010] Furthermore, in the above technical solution, the solder foot is cylindrical, and an electroplating layer is formed on the outer surface of the solder foot by a roll plating method.

[0011] Furthermore, in the above technical solution, the outer surface of the welding foot is also provided with a plane.

[0012] Furthermore, in the above technical solution, the outer conductor has a through hole, the central conductor passes through the center of the through hole and forms the annular gap, the insulator seals the lower section of the through hole, and an inner slot is formed between the upper end face of the insulator and the upper section of the through hole, and an outer slot is formed between the outer surface of the upper section of the outer conductor and the plastic shell, and the central conductor, the inner slot, and the outer slot are coaxially distributed.

[0013] Furthermore, in the above technical solution, the lower periphery of the outer conductor is formed with an outwardly protruding annular protrusion, and the lower end of the annular protrusion is provided with multiple bosses, each boss having a solder foot formed at its lower end; the plastic shell integrally wraps the upper and lower end faces and outer surface of the annular protrusion to form axial fixation, and the plastic shell partially fills the groove between two adjacent bosses to form circumferential fixation.

[0014] Furthermore, in the above technical solution, the annular protrusion is also provided with a first stepped groove, and the plastic shell is partially filled in the first stepped groove; the lower section of the through hole of the outer conductor is provided with a second stepped groove, and the insulator is partially filled in the second stepped groove.

[0015] Furthermore, in the above technical solution, the lower part of the outer conductor extends downward from the inner wall of its through hole to form at least two arc plates. The outer side of the arc plate is integrally connected with the boss and forms a solder gap with the solder foot. A flow-guiding interval is formed between two adjacent arc plates, which are connected by through holes. A flow-guiding groove is also provided on the bottom surface of the groove between two adjacent bosses. The flow-guiding groove is connected to the flow-guiding interval. The bottom of the plastic shell is also filled in the flow-guiding groove and the flow-guiding interval to form a connecting bridge connecting the insulator.

[0016] Furthermore, in the above technical solution, the bottom surface of the boss is exposed on the bottom surface of the plastic shell and is flush with the bottom surface of the plastic shell; the bottom surface of the insulator protrudes outside the plastic shell, and the bottom surface of the arc plate protrudes out and is exposed on the bottom surface of the insulator and is flush with the bottom surface of the insulator; the bottom surface of the plastic shell is formed with a plurality of downwardly protruding pads, the bottom surface of which protrudes outside the bottom surface of the insulator.

[0017] Furthermore, in the above technical solution, the central conductor includes a main body, a guide pin integrally formed on the upper end of the main body with a circular cross-section, and a pin integrally formed on the lower end of the main body. The main body has a spur for positioning with the insulator, and the connection part between the main body and the pin also has an outwardly protruding spur for positioning with the insulator. The lower surface of the spur is flush with the lower surface of the insulator, and the upper end of the guide pin has a conical guide portion.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention has only three parts, which is relatively few, and the plastic shell is integrally formed with the outer conductor and the center conductor by in-mold injection molding, which eliminates the need for assembly, reduces the production assembly process, and thus speeds up the entire connector manufacturing process, while reducing the manufacturing cost to a certain extent; and because the insulator integrally formed by the plastic shell fills the annular gap to fix the center conductor and the outer conductor, the sealing between the outer conductor, the center conductor and the plastic shell is better, the structural quality is more stable, and the holding force of the outer conductor and the center conductor can be improved, so that the pin will not fall off during use, thus improving the reliability of the product. Attached image description:

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a perspective view of the present invention from another angle;

[0021] Figure 3 This is an exploded perspective view of the present invention;

[0022] Figure 4 This is a cross-sectional view of the present invention;

[0023] Figure 5 This is a cross-sectional view from another perspective of this utility model;

[0024] Figure 6 This is a perspective view of the central conductor in this utility model;

[0025] Figure 7 This is a structural diagram of the plastic shell and the insulator in this utility model. Detailed implementation method:

[0026] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0027] See Figure 1-7 As shown, this is an integrated FAKRA board-end connector, characterized in that it includes an outer conductor 1, a center conductor 2, and a plastic shell 3.

[0028] The central conductor 2 is inserted inside the outer conductor 1 and forms an annular gap with the outer conductor 1. The pin 21 of the central conductor 2 extends out of the bottom of the outer conductor 1. The plastic shell 3 is fixedly integrated with the outer conductor 1 and the central conductor 2 by in-mold injection molding. The specific process is as follows: the outer conductor 1 and the central conductor 2 are directly placed into the mold cavity and directly injection molded. The insulator 4 integrally formed by the plastic shell 3 fills the annular gap to fix the central conductor 2 and the outer conductor 1. The pin 21 of the central conductor 2 extends out of the lower end face of the insulator 4. This utility model has only three parts, which is relatively few. The plastic shell 3 is integrally formed with the outer conductor 1 and the center conductor 2 through in-mold injection molding, which eliminates the need for assembly, reduces production assembly steps, and speeds up the entire connector manufacturing process. At the same time, it reduces manufacturing costs to a certain extent. Furthermore, since the insulator 4 integrally formed by the plastic shell 3 fills the annular gap to fix the center conductor 2 and the outer conductor 1, the sealing between the outer conductor 1, the center conductor 2 and the plastic shell 3 is better, the structural quality is more stable, and the holding force of the outer conductor 1 and the center conductor 2 can be improved. The pins will not come loose during use, thus improving the reliability of the product.

[0029] In this embodiment, the outer conductor 1 is die-cast from metal material, resulting in a stable overall structure and higher quality.

[0030] The bottom of the outer conductor 1 is provided with a plurality of solder feet 11, which are used to insert into the pads of the PCB board and are fixed by soldering to form electrical conductivity.

[0031] The outer surface of the plastic shell 3 is formed with a hook 31, which is used to hold and fix with the bayonet of the mating wire end connector to prevent accidental disengagement and improve the stability of conduction, avoiding signal interruption.

[0032] In this embodiment, the solder foot 11 is cylindrical, and an electroplating layer is formed on the outer surface of the solder foot 11 by roller plating. The electroplating process is simpler. At the same time, the addition of an electroplating layer to the solder foot 11 can better bond with the solder and improve the conductivity.

[0033] Since the outer conductor 1 is die-cast from metal material and the solder foot 11 is cylindrical, it is sturdy, reliable, and difficult to deform, which can improve product quality.

[0034] The outer surface of the solder foot 11 is also provided with a plane 111, which is used to increase the space between the solder foot 11 and the solder, or the plane 111 can also add a positioning function.

[0035] The following provides a detailed description of the assembly structure between the outer conductor 1, the center conductor 2, and the plastic shell 3.

[0036] The outer conductor 1 has a through hole 13, the center conductor 2 passes through the center of the through hole 13 and forms the annular gap, the insulator 4 seals the lower section of the through hole 13, and the upper end face of the insulator 4 forms an inner slot 10 between the upper end face of the insulator 4 and the upper section of the through hole 13, and the outer surface of the upper section of the outer conductor 1 forms an outer slot 30 between the outer surface of the upper section of the outer conductor 1 and the plastic shell 3. The center conductor 2, the inner slot 10 and the outer slot 30 are coaxially distributed.

[0037] To improve the stability of the assembly structure between the outer conductor 1 and the plastic shell 3, the following design is implemented: An outwardly protruding annular protrusion 14 is formed on the lower periphery of the outer conductor 1. The plastic shell 3 integrally wraps around the upper and lower end faces and outer surface of the annular protrusion 14 to form axial fixation, improving assembly quality and reliability, and further preventing pin slippage during use. Furthermore, multiple bosses 15 are provided at the lower end of the annular protrusion 14, each boss 15 having a solder foot 11 formed at its lower end. This strengthens the structure of the solder foot 11, preventing breakage. The plastic shell 3 also partially fills the groove 151 between adjacent bosses 15 to form circumferential fixation, further improving assembly quality and reliability.

[0038] To make the assembly of the outer conductor 1 and the plastic shell 3 more stable, the following design was also made: the annular protrusion 14 is also provided with a first stepped groove 141, and the plastic shell 3 is partially filled in the first stepped groove 141; the lower section of the through hole 13 of the outer conductor 1 is provided with a second stepped groove 131, and the insulator 4 is partially filled in the second stepped groove 131, so that the plastic shell 3 and the insulator 4 are clamped together from above and below to secure the outer conductor 1, which greatly enhances the strength and stability of the structure.

[0039] In addition, at least two arc plates 16 are formed extending downward from the inner wall of the through hole 13 at the lower part of the outer conductor 1. The outer side of the arc plate 16 is integrally connected with the boss 15 and forms a solder gap 161 with the solder foot. When the solder foot is soldered, some solder can be blocked by the arc plate 16 to enter the solder gap 161, thereby increasing the contact area with the solder and enhancing the soldering quality. Furthermore, a flow-guiding interval 162 with a connecting through hole 13 is formed between two adjacent arc plates 16, and a flow-guiding groove 152 is also provided on the bottom surface of the groove 151 between two adjacent bosses 15. The flow-guiding groove 152 is connected to the flow-guiding interval 162, which facilitates smoother flow of plastic material during the injection molding of the plastic shell 3, so as to better form the insulator 4. After the plastic material is cured, a connecting bridge 31 is formed, that is, the bottom of the plastic shell 3 is also filled in the flow-guiding groove 152 and the flow-guiding interval 162 to form a connecting bridge 31 connecting the insulator 4, thereby ensuring the stability of the connection between the plastic shell 3 and the insulator 4, forming a plastic shell with an integrated structure.

[0040] In some embodiments, the bottom surface of the boss 15 is exposed on the bottom surface of the plastic shell 3 and is flush with the bottom surface of the plastic shell 3; the bottom surface of the insulator 4 protrudes from the plastic shell 3, and the bottom surface of the arc plate 16 protrudes from the bottom surface of the insulator 4 and is flush with the bottom surface of the insulator 4; the bottom surface of the plastic shell 3 is formed with a plurality of downwardly protruding pads 32, the bottom surface of the pads 32 protruding from the bottom surface of the insulator 4, the pads 32 are used to contact the PCB board, so that a gap is formed between the bottom surface of the plastic shell 3 and the PCB board, which can form airflow during reflow soldering, thereby achieving better soldering.

[0041] The central conductor 2 includes a main body 22, a guide pin 23 integrally formed on the upper end of the main body 22 with a circular cross-section, and a lead 21 integrally formed on the lower end of the main body 22. The main body 22 has a spur 221 formed on its exterior to position itself with the insulator 4. The spur 221 achieves primary positioning with the insulator 4. The connection between the main body 22 and the lead 21 also has a protruding spur 222 that protrudes outward and is positioned with the insulator 4. The spur 222 achieves secondary positioning with the insulator 4. The lower surface of the spur 222 is flush with the lower surface of the insulator 4, which increases the welding area when soldering with the lead 21. That is, the lower surface of the spur 222 can also contact the solder, thereby improving the soldering quality. The upper end of the guide pin 23 has a conical guide portion 231, which has a guiding function and is connected to the subsequent insertion.

[0042] In summary, this utility model has only three parts, which is relatively few. The plastic shell 3 is integrally formed with the outer conductor 1 and the center conductor 2 through in-mold injection molding, eliminating the need for assembly and reducing production assembly steps. This accelerates the entire connector manufacturing process and reduces production costs to a certain extent. Furthermore, since the insulator 4 integrally formed by the plastic shell 3 fills the annular gap to fix the center conductor 2 and the outer conductor 1, the sealing between the outer conductor 1, the center conductor 2, and the plastic shell 3 is better, resulting in more stable structural quality. It also improves the holding force of the outer conductor 1 and the center conductor 2, preventing pin slippage during use and improving product reliability.

[0043] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. An integrated FAKRA board-end connector, characterized in that: It includes: The outer conductor (1) has multiple solder feet (11) at its bottom; A center conductor (2) is inserted inside the outer conductor (1) and forms an annular gap with the outer conductor (1). The pin (21) of the center conductor (2) extends out of the bottom of the outer conductor (1). The plastic shell (3) is integrally formed with the outer conductor (1) and the center conductor (2) by in-mold injection molding. The insulator (4) integrally formed by the plastic shell (3) is filled in the annular gap to fix the center conductor (2) and the outer conductor (1) together. The pin (21) of the center conductor (2) extends out of the lower end face of the insulator (4).

2. The integrated FAKRA board-end connector according to claim 1, characterized in that: The outer conductor (1) is die-cast from a metal material.

3. The integrated FAKRA board-end connector according to claim 1, characterized in that: The solder foot (11) is cylindrical, and an electroplating layer is formed on the outer surface of the solder foot (11) by roller plating.

4. The integrated FAKRA board-end connector according to claim 2, characterized in that: The outer surface of the welding foot (11) is also provided with a plane (111).

5. An integrated FAKRA board-end connector according to any one of claims 1-4, characterized in that: The outer conductor (1) has a through hole (13), the center conductor (2) passes through the center of the through hole (13) and forms the annular gap, the insulator (4) seals the lower section of the through hole (13), and the upper end face of the insulator (4) forms an inner slot (10) between the upper end face of the insulator (4) and the upper section of the through hole (13), and the outer surface of the upper section of the outer conductor (1) forms an outer slot (30) between the outer surface of the upper section of the outer conductor (1) and the plastic shell (3), and the center conductor (2), the inner slot (10) and the outer slot (30) are coaxially distributed.

6. An integrated FAKRA board-end connector according to any one of claims 1-5, characterized in that: The lower periphery of the outer conductor (1) is formed with an outwardly protruding annular protrusion (14), and the lower end of the annular protrusion (14) is provided with a plurality of bosses (15), and each boss (15) has a solder foot (11) formed at its lower end; the plastic shell (3) integrally wraps the upper and lower end faces and outer surface of the annular protrusion (14) to form axial fixation, and the plastic shell (3) partially fills the groove (151) between two adjacent bosses (15) to form circumferential fixation.

7. The integrated FAKRA board-end connector according to claim 6, characterized in that: The annular protrusion (14) is also provided with a first stepped groove (141), and the plastic shell (3) is partially filled in the first stepped groove (141); the lower section of the through hole (13) of the outer conductor (1) is provided with a second stepped groove (131), and the insulator (4) is partially filled in the second stepped groove (131).

8. The integrated FAKRA board-end connector according to claim 6, characterized in that: The lower part of the outer conductor (1) extends downward from the inner wall of its through hole (13) and is formed with at least two arc plates (16). The outer side of the arc plate (16) is integrally connected with the boss (15) and forms a tin-accepting gap (161) with the solder foot. A flow-guiding interval (162) connecting the through hole (13) is formed between two adjacent arc plates (16). A flow-guiding groove (152) is also provided on the bottom surface of the groove (151) between two adjacent bosses (15). The flow-guiding groove (152) is connected to the flow-guiding interval (162). The bottom of the plastic shell (3) is also filled in the flow-guiding groove (152) and the flow-guiding interval (162) to form a connecting bridge (31) connecting the insulator (4).

9. The integrated FAKRA board-end connector according to claim 8, characterized in that: The bottom surface of the boss (15) is exposed on the bottom surface of the plastic shell (3) and is flush with the bottom surface of the plastic shell (3); the bottom surface of the insulator (4) protrudes out of the plastic shell (3), and the bottom surface of the arc plate (16) protrudes out of the bottom surface of the insulator (4) and is flush with the bottom surface of the insulator (4); the bottom surface of the plastic shell (3) is formed with a plurality of downward protruding pads (32), the bottom surface of which protrudes out of the bottom surface of the insulator (4).

10. An integrated FAKRA board-end connector according to any one of claims 1-5, characterized in that: The central conductor (2) includes a main body (22), a guide pin (23) integrally formed on the upper end of the main body (22) and having a circular cross-section, and a lead (21) integrally formed on the lower end of the main body (22). The main body (22) has a spur (221) formed on its exterior to position it in the insulator (4), and the connection between the main body (22) and the lead (21) also has a protruding protrusion (222) that protrudes outward and is positioned in the insulator (4). The lower surface of the protrusion (222) is flush with the lower surface of the insulator (4), and the upper end of the guide pin (23) has a conical guide portion (231).

Images