Automotive differential signal connector

Abstract

The application discloses a differential signal connector for an automobile, which comprises a shell and an insulator integrally formed by a mold; a shielding member, four signal pins and two power supply pins are wrapped in the insulator; the four signal pins are uniformly distributed and form a diagonal pairing structure for differential signal transmission; the shielding member is arranged on the outer side of the four signal pins; the two power supply pins are used for connecting an emergency starting power supply or a storage battery test connecting line of the automobile; the connector is further provided with a plurality of soldering legs which are used for being inserted into mounting holes of a PCB and being welded and fixed. The technical scheme can save the part assembling process, reduce the labor cost and the mold cost, has no assembling joint, improves the overall structural strength, enhances the anti-vibration capacity, and double resists the strong electromagnetic interference in the automobile through the shielding member and the diagonal pairing signal pins; the shell and the insulator are integrally formed by the same material, and the thermal expansion of the insulator can be reduced.

Description

Technical Field

[0001] This application relates to the field of connector technology, and in particular to an automotive differential signal connector. Background Technology

[0002] With the development of automotive electronics technology, the demand for high-speed data transmission from devices such as in-vehicle cameras, radar, and entertainment systems is increasing. As a core transmission component, automotive differential signal connectors must meet industrial-grade requirements such as resistance to high and low temperatures, waterproofing, dustproofing, and electromagnetic interference resistance.

[0003] Existing automotive differential signal connectors mostly adopt a split structure, assembled from multiple independent parts such as the shell, insulator, signal pins, and shielding. This approach results in a large number of parts, leading to higher production and mold costs, and the assembly process is cumbersome, time-consuming, and labor-intensive, further increasing the overall product cost. Moreover, assembly errors are prone to occur during the assembly of multiple parts, causing instability in the overall mechanical performance of the connector and affecting its reliability. Additionally, the existing shell and insulator are made of different materials with different coefficients of thermal expansion. Under the high and low temperature cycling environment of automotive operation, the insulator is prone to thermal expansion and bulging, causing instability in the connector interface dimensions, which in turn can lead to signal transmission interruption or distortion. Utility Model Content

[0004] The main purpose of this application is to propose an automotive differential signal connector that aims to solve the problems of high cost, easy assembly errors, and easy thermal expansion of insulators in existing products.

[0005] To achieve the above objectives, the automotive differential signal connector proposed in this application includes: a housing and an insulator integrally cast by a mold; The insulator contains a shield, four signal pins, and two power pins. The four signal pins are evenly distributed and form a diagonally paired structure for differential signal transmission. The shield covers the outside of the four signal pins. The two power pins are used for connecting car emergency jump starters or battery test cables. The connector is also provided with multiple solder feet, which are used to insert into the mounting holes of the PCB board and solder to fix it.

[0006] Optionally, the insulator is integrally formed with a plurality of evenly distributed support feet, which are used to support the PCB board, so that there is a gap between the bottom surface of the connector and the PCB board.

[0007] Optionally, the insulator has an outer coating on the signal PIN, power PIN, and solder pad to prevent burrs from forming during molding.

[0008] Optionally, the shielding component has a cylindrical structure, and the plurality of solder feet are disposed at one end of the shielding component, and the shielding component and the solder feet are integrally formed from metal material.

[0009] Optionally, the shielding component has a pre-drainage hole, which is used to fill the insulating material and form a stable connection with the insulator.

[0010] Optionally, the housing and the insulator are cast from PBT material.

[0011] Optionally, the temperature range of the PBT material is -40℃ to 105℃.

[0012] Optionally, the outer wall of the shielding component is provided with an annular first protrusion, which is used to enhance the bonding force between the shielding component and the insulator.

[0013] Optionally, the cross-sections of both ends of the signal PIN used for electrical connection are both circular; the cross-section of the middle section of the signal PIN wrapped by the insulator is square, and a second protrusion is also provided to enhance the bonding force between the signal PIN and the insulator.

[0014] Optionally, the cross-section of the power PIN is set to square.

[0015] This application's technical solution features an outer shell and insulator integrally cast using a mold. The insulator internally houses a shield, four signal pins, and two power pins. The four signal pins are evenly distributed and form a diagonally paired structure for differential signal transmission. The shield covers the outside of the four signal pins. The two power pins are used for connecting to automotive emergency jump starters or battery test lines. The connector also has multiple solder pads for insertion into mounting holes on the PCB board and soldering for fixation. During connector manufacturing, the shield, four diagonally paired signal pins, and two power pins are pre-positioned within the mold cavity and integrally cast, simultaneously forming the outer shell and insulator. In use, the connector's multiple solder pads are inserted into the mounting holes on the PCB board and fixed by soldering. The signal pins transmit differential signals through a diagonal arrangement, and the two power pins are connected to automotive emergency jump starters or battery test lines. The shield covering the signal pins isolates electromagnetic interference. This technical solution eliminates the need for parts assembly through one-piece molding, reducing labor and mold costs; the absence of assembly seams improves the overall structural strength and enhances vibration resistance; the shielding component plus diagonally paired signal pins provide double protection against strong electromagnetic interference inside the vehicle; and the shell and insulator are integrally cast from the same material, which reduces the thermal expansion of the insulator. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the automotive differential signal connector of this application; Figure 2 This is an exploded view of the components of the automotive differential signal connector of this application; Figure 3 This is a schematic diagram of the shielding component in the automotive differential signal connector of this application.

[0018] Explanation of icon numbers: 1. Outer shell; 2. Insulator; 201. Support foot; 202. Glue-coated surface; 203. Glue reduction hole; 3. Shielding component; 301. Air guide hole; 302. First bump; 4. Signal PIN; 401. Second bump; 5. Power PIN; 6. Solder foot.

[0019] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0024] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0025] Existing automotive differential signal connectors mostly adopt a split structure, assembled from multiple independent parts such as the shell, insulator, signal pins, and shielding. This approach results in a large number of parts, leading to higher production and mold costs, and the assembly process is cumbersome, time-consuming, and labor-intensive, further increasing the overall product cost. Moreover, assembly errors are prone to occur during the assembly of multiple parts, causing instability in the overall mechanical performance of the connector and affecting its reliability. Additionally, the existing shell and insulator are made of different materials with different coefficients of thermal expansion. Under the high and low temperature cycling environment of automotive operation, the insulator is prone to thermal expansion and bulging, causing instability in the connector interface dimensions, which can lead to signal transmission interruption or distortion. In view of this, this application proposes an automotive differential signal connector.

[0026] In the embodiments of this application, reference is made to Figures 1 to 3The aforementioned automotive differential signal connector includes: a housing 1 integrally cast by a mold and an insulator 2; the insulator 2 is internally enclosed by a shield 3, four signal pins 4 and two power pins 5, the four signal pins 4 are evenly distributed and form a diagonally paired structure for differential signal transmission, the shield 3 covers the outside of the four signal pins 4, and the two power pins 5 are used for connecting the automotive emergency jump starter or battery test wire; the connector is also provided with multiple solder feet 6, which are used to insert into the mounting holes of the PCB board and solder to fix it.

[0027] Specifically, during connector manufacturing, the shield 3, four diagonally paired signal PINs 4, and two power PINs 5 are pre-positioned within the mold cavity and integrally cast, simultaneously molding the outer shell 1 and the insulator 2. In use, the connector's multiple solder pins 6 are inserted into the mounting holes on the PCB board (circuit board) and fixed by soldering. The signal PINs 4 transmit differential signals through a diagonal arrangement, while the two power PINs 5 are connected to a car emergency jump starter or battery test circuit. The shield 3 encloses the signal PINs 4 to isolate electromagnetic interference. The simultaneous casting of the outer shell 1 and the insulator 2 eliminates gaps or errors in the assembly of multiple parts, ensuring overall structural consistency. The evenly distributed and diagonally paired design of the four signal PINs 4 forms two sets of differential signal pairs. The receiving end extracts effective data by calculating the voltage difference between the paired signals, canceling common-mode interference. The shield 3 physically isolates external electromagnetic radiation, and the independent layout of the power PINs 5 and signal PINs 4 prevents power fluctuations from affecting signal transmission.

[0028] In this embodiment, the insulator 2 is integrally formed with multiple evenly distributed support feet 201. The support feet 201 are used to support the connector on the PCB board, creating a gap between the bottom surface of the connector and the PCB board. The gap formed by the support feet 201 can accommodate solder overflow during soldering, preventing solder accumulation that could lead to rigid contact between the bottom surface of the connector and the PCB board. At the same time, it can isolate dust and impurities on the PCB board surface, preventing connector deformation caused by impurities pressing in. The even distribution of multiple support feet 201 disperses the contact force between the connector and the PCB board, preventing breakage of the solder feet 6 due to single-point force.

[0029] In this embodiment, the outer sides of the insulator 2 corresponding to signal PIN4, power PIN5, and solder pads 6 are all covered with a rubber-coated surface 202 to prevent burrs from forming during molding. The rubber-coated surface 202 is a preset molding plane. When the mold is closed, the plastic material forms a complete cover on the outer side of the PIN pins / solder pads 6, preventing plastic from overflowing and forming burrs.

[0030] In this embodiment, the shielding component 3 is a cylindrical structure, with multiple solder feet 6 disposed at one end of the shielding component 3. Furthermore, the shielding component 3 and the solder feet 6 are integrally formed from metal. The cylindrical shielding component 3 provides more comprehensive coverage than a sheet-like shield, blocking electromagnetic radiation from any direction. The integral metal formation of the shielding component 3 and the solder feet 6 eliminates connection gaps, resulting in lower grounding resistance. Electromagnetic interference can be quickly conducted to the PCB ground layer through the solder feet 6, preventing interference signals from accumulating within the shielding component 3.

[0031] In this embodiment, the shield 3 has a pre-drainage hole 301, which is used to fill the insulator 2 material and form a stable connection with the insulator 2. The drainage hole 301 allows the plastic material to penetrate the shield 3 and fill to the outside of the signal PIN 4; at the same time, it forms a bidirectional interlocking structure, which improves the bonding force by 2-3 times compared to simple outer wall adhesion.

[0032] In this embodiment, the outer shell 1 and the insulator 2 are made of PBT material. PBT material has a glass transition temperature of about 220°C and high crystallinity; moreover, PBT material is oil-resistant and moisture-resistant, and can resist oil stains and rainwater erosion in the engine compartment.

[0033] In this embodiment, the temperature range of the PBT material is -40℃ to 105℃. The temperature range of the PBT material matches the actual use environment of automobiles, which can avoid excessive temperature resistance leading to high costs or insufficient temperature resistance leading to failure; the coefficient of thermal expansion of a single PBT material is uniform, and the outer shell 1 and the insulator 2 contract or expand synchronously, eliminating the risk of stress cracking in a split structure.

[0034] In this embodiment, the outer wall of the shielding member 3 is provided with an annular first protrusion 302, which is used to enhance the bonding force between the shielding member 3 and the insulator 2. The protruding structure of the annular protrusion forms a barb effect with the insulator 2, which is more resistant to axial tensile force than the frictional constraint of the smooth outer wall.

[0035] In this embodiment, the cross-sections of both ends of the signal PIN4 used for electrical connection are circular; the cross-section of the middle section of the signal PIN4, which is wrapped by the insulator 2, is square, and a second protrusion 401 is also provided to enhance the bonding force between the signal PIN4 and the insulator 2. When the arc surface of the circular cross-section contacts the external terminal, it can automatically correct minor deviations and stabilize the contact resistance; the planar contact between the square section and the insulator 2 restricts the rotation of the signal PIN4, and the second protrusion 401 further enhances the mechanical engagement and reduces the diagonal spacing of the four signal PIN4s.

[0036] In this embodiment, the cross-section of the power PIN5 is set to square. The planar friction of a square cross-section is greater than that of a circle, preventing the power PIN5 from becoming loose during emergency startup.

[0037] Specifically, the insulator 2 is also provided with a plastic reduction hole 203, which also functions as a demolding ejector pin. The plastic reduction hole 203 provides an action point for the demolding ejector pin, avoiding scratches caused by direct contact between the ejector pin and the insulator 2; at the same time, it reduces the amount of plastic used, thereby reducing material costs and molding cycle.

[0038] This application's technical solution features an outer shell and insulator integrally cast using a mold. The insulator internally houses a shield, four signal pins, and two power pins. The four signal pins are evenly distributed and form a diagonally paired structure for differential signal transmission. The shield covers the outside of the four signal pins. The two power pins are used for connecting to automotive emergency jump starters or battery test lines. The connector also has multiple solder pads for insertion into mounting holes on the PCB board and soldering for fixation. During connector manufacturing, the shield, four diagonally paired signal pins, and two power pins are pre-positioned within the mold cavity and integrally cast, simultaneously forming the outer shell and insulator. In use, the connector's multiple solder pads are inserted into the mounting holes on the PCB board and fixed by soldering. The signal pins transmit differential signals through a diagonal arrangement, and the two power pins are connected to automotive emergency jump starters or battery test lines. The shield covering the signal pins isolates electromagnetic interference. This technical solution eliminates the need for parts assembly through one-piece molding, reducing labor and mold costs; the absence of assembly seams improves the overall structural strength and enhances vibration resistance; the shielding component plus diagonally paired signal pins provide double protection against strong electromagnetic interference inside the vehicle; and the shell and insulator are integrally cast from the same material, which reduces the thermal expansion of the insulator.

[0039] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A differential signal connector for automobiles, characterized in that, include: The outer shell and insulator are integrally cast using a mold; The insulator contains a shield, four signal pins, and two power pins. The four signal pins are evenly distributed and form a diagonally paired structure for differential signal transmission. The shield covers the outside of the four signal pins. The two power pins are used for connecting car emergency jump starters or battery test cables. The connector is also provided with multiple solder feet, which are used to insert into the mounting holes of the PCB board and solder to fix it.

2. The automotive differential signal connector as described in claim 1, characterized in that, The insulator is integrally formed with multiple evenly distributed support feet, which are used to support the PCB board, so that there is a gap between the bottom surface of the connector and the PCB board.

3. The automotive differential signal connector as described in claim 1, characterized in that, The insulator has an outer coating on the signal PIN, power PIN, and solder pad to prevent burrs from forming during molding.

4. The automotive differential signal connector as described in claim 1, characterized in that, The shielding component has a cylindrical structure, and multiple solder feet are disposed at one end of the shielding component. The shielding component and the solder feet are integrally formed from metal materials.

5. The automotive differential signal connector as described in claim 4, characterized in that, The shielding component has pre-drilled drainage holes, which are used to fill the insulating material and form a stable connection with the insulator.

6. The automotive differential signal connector as described in claim 1, characterized in that, The outer shell and the insulator are made of PBT material.

7. The automotive differential signal connector as described in claim 6, characterized in that, The temperature range of the PBT material is -40℃ to 105℃.

8. The automotive differential signal connector as described in claim 1, characterized in that, The outer wall of the shielding component is provided with an annular first protrusion, which is used to enhance the bonding force between the shielding component and the insulator.

9. The automotive differential signal connector as described in claim 1, characterized in that, The signal PIN has circular cross-sections at both ends for electrical connection; the middle section of the signal PIN, which is wrapped by the insulator, has square cross-sections and is further provided with a second protrusion to enhance the bonding force between the signal PIN and the insulator.

10. The automotive differential signal connector as described in claim 1, characterized in that, The cross-section of the power PIN is square.

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