A Mini FAKRA connector

Abstract

This utility model discloses a Mini FAKRA connector, including a plastic body, an outer conductor assembly, an inner conductor, and a shielding plate. The plastic body includes a mating connector and a mounting cavity, with an elastic locking arm at the tail end of the mating connector. The outer conductor assembly includes a sleeve conductor and a terminal block, with a receiving groove in the terminal block and a fixing groove on its outer wall; the elastic locking arm engages with the fixing groove. The inner conductor is fixed in the receiving groove by an insulating medium. The shielding plate includes a shielding plate covering the tail end of the terminal block, with an outwardly extending arm on its side; the arm is embedded in the fixing groove, forming a rigid barrier that restricts the elastic deformation of the locking arm. This utility model eliminates the risk of locking arm loosening due to vibration or tension by positioning the arm of the shielding plate on the deformation path of the elastic arm and forming a rigid barrier. While improving reliability, it does not require the introduction of new parts or complex processes, avoiding the additional costs of traditional auxiliary locking mechanisms.

Description

Technical Field

[0001] This utility model belongs to the field of electrical connector technology, and in particular relates to a Mini FAKRA connector. Background Technology

[0002] With the rapid development of in-vehicle infotainment systems, advanced driver assistance systems (ADAS), and vehicle-to-everything (V2X) technologies, the Mini FAKRA connector, as a key component for connecting various electronic systems in modern vehicles and enabling signal and power transmission, directly affects the safety and reliability of the entire vehicle. The reliability requirements for Mini FAKRA connectors are becoming increasingly stringent.

[0003] Currently, MINI FAKRA board-end connectors generally rely on the engagement of elastic locking arms on the plastic body with the fixing slots of the external guide components for mechanical locking. While this offers the advantage of convenient installation and disassembly, this structure has a fundamental weakness under dynamic stress: the cantilever beam structure of the elastic locking arms is highly susceptible to elastic deformation exceeding its design range under continuous vibration or lateral tension, causing the locking arms to detach from the fixing slots, resulting in unexpected connector unlocking and signal transmission interruption. This problem is particularly prominent in high-vibration scenarios such as automotive applications.

[0004] To address this issue, existing solutions typically involve adding auxiliary locking structures to the plastic body or external guide components. While such auxiliary structures may improve the anti-loosening effect to some extent, they inevitably increase the number of additional parts, mold complexity, and assembly steps, significantly driving up manufacturing costs. Utility Model Content

[0005] The purpose of this invention is to provide a Mini FAKRA connector to address the shortcomings of existing technologies.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A Mini FAKRA connector includes a plastic body, an outer conductor assembly, an inner conductor, and a shielding plate. The plastic body includes a mating connector for mating with a Mini FAKRA connector and a mounting cavity within the mating connector. The outer conductor assembly includes a sleeve conductor fitted into the mounting cavity and a terminal block integrally formed at the end of the sleeve conductor. The terminal block has a receiving groove communicating with the sleeve conductor. The inner conductor is fixed within the receiving groove by an insulating medium. The shielding plate includes a shielding plate covering the tail end of the terminal block. The tail end of the mating connector has a resilient locking arm that engages with a fixing groove on the outer wall of the terminal block. The shielding plate has an outwardly extending arm on its side, the arm portion being embedded in the fixing groove to form a rigid barrier restricting elastic deformation of the resilient locking arm.

[0008] Furthermore, there are two elastic locking arms, which are integrally formed by extending backward from the ends of the two side walls of the connector.

[0009] Furthermore, the elastic arm includes two mirror-shaped and spaced elastic arms, and the fixing groove is provided with two snap-fit ​​protrusions that cooperate with the elastic arms.

[0010] Furthermore, the fixing groove is also provided with a limiting boss, and the end of the arm is provided with a barb that engages with the limiting boss.

[0011] Furthermore, the barb of the arm, the fastening protrusion, and the elastic support arm are in the same plane, and the arm is located on the elastic deformation path of the elastic support arm.

[0012] Furthermore, the side wall of the terminal block is provided with a clearance groove for the arm to pass through. The depth of the clearance groove is less than the depth of the fixing groove, and the height difference between the clearance groove and the fixing groove forms the limiting boss. The main body of the arm is embedded in the clearance groove, and the barb of the arm is located in the fixing groove and is engaged with the limiting boss.

[0013] Furthermore, the arm extends outward from the side portion of the shielding plate and is bent to form the arm.

[0014] Furthermore, the bottom of the terminal block is provided with a plurality of columnar solder feet, the axis of which is perpendicular to the insertion direction of the connector.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The Mini FAKRA connector provided by this utility model fundamentally eliminates the risk of the locking arm loosening due to vibration or tension by positioning the arm of the shielding plate on the deformation path of the elastic support arm and forming a rigid block. While significantly improving reliability, it does not require the introduction of any independent new parts or complex processes, thus avoiding the additional cost burden brought by traditional auxiliary locking schemes. Attached Figure Description

[0017] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a Mini FAKRA connector provided for an embodiment of this utility model. Figure 1 ;

[0019] Figure 2 A schematic diagram of the structure of a Mini FAKRA connector provided for an embodiment of this utility model. Figure 2 ;

[0020] Figure 3 A side view of a Mini FAKRA connector provided for an embodiment of this utility model;

[0021] Figure 4 A cross-sectional view of a Mini FAKRA connector provided for an embodiment of this utility model;

[0022] Figure 5 An exploded view of a Mini FAKRA connector provided for an embodiment of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the outer conductor assembly in a Mini FAKRA connector provided for an embodiment of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1-Connector, 2-Elastic support arm, 201-Inverted hook, 3-Sleeve conductor, 4-Terminal base, 401-Receiving groove, 402-Fixing groove, 403-Snap-on protrusion, 404-Allowing groove, 405-Limiting boss, 406-Welding foot, 5-Inner conductor, 6-Insulating medium, 7-Shielding sheet, 701-Holding arm, 702-Inverted hook. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0027] like Figures 1 to 5 As shown, this embodiment of the present invention provides a Mini FAKRA connector, the structure of which mainly includes a plastic body, an outer conductor assembly, an inner conductor 5, and a shielding sheet 7. Specifically:

[0028] The plastic body is integrally injection molded, with a connector 1 at the front end. The connector 1 serves as the physical interface for mating with the wire connector, allowing it to connect to the Mini FAKRA wire connector. An axial mounting cavity is formed inside the connector 1 to accommodate and position the outer conductor assembly. At the rear ends of the left and right side walls of the connector 1, two mirror-symmetrical elastic locking arms extend rearward. Each elastic locking arm further includes two spaced, mirror-aligned elastic support arms 2, which extend outward from the periphery of the mounting cavity. The elastic support arms 2 engage with the outer conductor assembly to reliably mechanically lock the plastic body to the outer conductor assembly, preventing the outer conductor assembly from accidentally dislodging from the mounting cavity.

[0029] The outer conductor assembly is integrally die-cast from zinc alloy and includes a sleeve conductor 3 and a terminal block 4. The sleeve conductor 3 is assembled and fixed within the mounting cavity of the plastic body. The sleeve conductor 3 serves as the primary outer shielding layer, providing electromagnetic shielding and mechanical guidance during insertion. The terminal block 4 is formed at the end of the sleeve conductor 3 and has an internal receiving groove 401 communicating with the internal space of the sleeve conductor 3. The receiving groove 401 is used to accommodate and fix the inner conductor 5 and its insulating medium 6. A fixing groove 402 is formed on the outer wall of the terminal block 4. Two locking protrusions 403 are mirror-imagely arranged on the upper and lower edges of the inner wall of the fixing groove 402. Correspondingly, the end of the elastic support arm 2 has a buckle 201. When the sleeve conductor 3 is assembled into the mounting cavity of the plastic body, the locking protrusions 403 can engage with the buckle 201 of the elastic support arm 2 of the plastic body to achieve mechanical locking. The terminal block 4 has a clearance groove 404 on its side wall corresponding to the area of ​​the arm 701. The clearance groove 404 provides an installation channel and limiting space for the arm 701 of the shielding sheet 7. The end of the clearance groove 404 near the shielding sheet 7 (i.e., the insertion end) has a guide slope to facilitate the insertion of the arm. The depth of the end of the clearance groove 404 near the fixing groove 402 is less than the depth of the fixing groove 402, so that the depth difference between the two forms a stepped structure (i.e., a limiting boss 405). The bottom of the terminal block 4 has a plurality of downwardly protruding columnar solder feet 406. The axis of the solder feet 406 is perpendicular to the insertion direction of the connector, and is used to vertically solder the entire outer conductor assembly to the printed circuit board.

[0030] The inner conductor 5 serves as the core signal transmission channel of the connector. It is fixed within the receiving groove 401 of the terminal block 4 of the outer conductor assembly by an insulating medium 6 (such as injection-molded plastic). One end of the inner conductor 5 extends into the internal space of the sleeve conductor 3, with its axis coaxial with the sleeve conductor 3. The other end is bent vertically downward and extends through the terminal block 4 to be soldered to the printed circuit board to achieve signal transmission. The insulating medium 6 is used to electrically isolate the inner conductor 5 from the outer conductor assembly, ensuring signal transmission integrity and maintaining the impedance matching characteristics required by the connector.

[0031] The shielding plate 7 mainly includes a shielding plate covering the tail end plane of the terminal block 4 of the outer conductor assembly. The shielding plate covers the tail end opening of the terminal block 4, effectively shielding electromagnetic leakage in this area and improving the overall electromagnetic compatibility of the connector. An arm 701 extends outward and is bent from the side of the shielding plate (corresponding to the positions of the clearance groove 404 and the fixing groove 402 on the terminal block 4). A barb 702 is formed at the end of the arm 701. After assembly, the main body of the arm 701 is embedded in the clearance groove 404 on the side wall of the terminal block 4, and the barb 702 at its end extends into the fixing groove 402 and engages with the limiting boss 405 therein. This quickly and firmly fixes the shielding plate 7 to the terminal block 4. Simultaneously, the barb 702 of the arm 701, the engaging protrusion 403 in the fixing groove 402, and the buckle 201 of the elastic support arm 2 are all in the same plane. The position of the arm 701 is also exactly at the elasticity of the elastic support arm 2 of the plastic body. On the deformation path (i.e., a rigid block is formed in the direction of the elastic support arm 2 to deform outward), when the elastic support arm 2 of the plastic body is subjected to an external force (such as vibration or pulling) that may cause accidental loosening, the retaining arm 701 will prevent the elastic support arm 2 from undergoing excessive elastic deformation outward, thereby effectively preventing the elastic support arm 2 from disengaging from the snap-fit ​​protrusion 403 in the fixing groove 402, ensuring that the locking state between the plastic body and the outer conductor assembly is stable and reliable, and greatly enhancing the mechanical stability and failure prevention capability of the connector.

[0032] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A Mini FAKRA connector, characterized in that, include: The plastic body includes a mating connector (1) for mating with the Mini FAKRA wire connector and a mounting cavity formed within the mating connector (1); The outer conductor assembly includes a sleeve conductor (3) assembled in the mounting cavity and a terminal block (4) integrally formed at the end of the sleeve conductor (3), wherein the terminal block (4) has a receiving groove (401) that communicates with the sleeve conductor (3). The inner conductor (5) is fixed in the receiving groove (401) by an insulating medium (6); The shielding sheet (7) includes a shielding plate covering the tail end of the terminal block (4); The connector (1) is provided with an elastic locking arm at its tail end. The elastic locking arm is engaged with a fixing groove (402) on the outer wall of the terminal block (4). The shielding plate is provided with an outwardly extending arm (701) on its side. The arm (701) is partially embedded in the fixing groove (402) to form a rigid barrier that restricts the elastic locking arm from undergoing elastic deformation.

2. A Mini FAKRA connector according to claim 1, characterized in that: There are two elastic locking arms, which are formed by extending backward integrally from the ends of the two side walls of the connector (1).

3. A Mini FAKRA connector according to claim 1, characterized in that: The elastic arm includes two mirror-arranged and spaced elastic arms (2), and the fixing groove (402) is provided with two snap-fit ​​protrusions (403) that cooperate with the elastic arms (2).

4. A Mini FAKRA connector according to claim 3, characterized in that: The fixing groove (402) is also provided with a limiting boss (405), and the end of the arm (701) is provided with a barb (702) that engages with the limiting boss (405).

5. A Mini FAKRA connector according to claim 4, characterized in that: The barb (702) of the arm (701), the fastening protrusion (403) and the elastic support arm (2) are in the same plane, and the arm (701) is located on the elastic deformation path of the elastic support arm (2).

6. A Mini FAKRA connector according to claim 5, characterized in that: The terminal block (4) has a clearance groove (404) on its side wall for the arm (701) to pass through. The depth of the clearance groove (404) is less than the depth of the fixing groove (402). The height difference between the clearance groove (404) and the fixing groove (402) forms the limiting boss (405). The main body of the arm (701) is embedded in the clearance groove (404). The barb (702) of the arm (701) is located in the fixing groove (402) and is engaged with the limiting boss (405).

7. A Mini FAKRA connector according to claim 5, characterized in that: The arm (701) is formed by extending outward and bending from the side portion of the shielding plate.

8. A Mini FAKRA connector according to claim 1, characterized in that: The terminal block (4) has multiple columnar solder feet (406) at its bottom, and the axis of the solder feet (406) is perpendicular to the insertion direction of the connector.

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