OBD plug, OBD cable and on-board OBD diagnostic device

Abstract

The utility model discloses an OBD plug, an OBD cable and a vehicle-mounted OBD diagnostic device, the OBD plug comprises a pedestal, an interface seat and a plurality of pins, the interface seat is arranged on the pedestal, one end of the interface seat far away from the pedestal is opened to form a jack, and the inner wall of the interface seat is provided with a clamping hole clamped with a buckle on an electric connector; the plurality of pins are arranged in the socket and are used for being inserted into pin holes in the electric connector when the interface seat is inserted into the vehicle OBD diagnosis interface; a chamfer is arranged on the inner edge of the end, away from the base, of the interface seat, a rib protruding inwards is arranged on the inner wall of the interface seat and extends in the depth direction of the insertion opening, and an inclined guide face is arranged at the end, close to the chamfer, of the rib and used for guiding the interface seat to be inserted into the vehicle OBD diagnosis interface. According to the utility model, the connection between the OBD plug and the vehicle OBD diagnosis interface is more reliable, the loosening problem caused by vibration and impact in the use process is reduced, and the working reliability of the OBD diagnosis equipment in the use scene is improved.

Description

Technical Field

[0001] This utility model relates to a plug, and more particularly to an OBD plug, an OBD cable, and an on-board OBD diagnostic device. Background Technology

[0002] OBD (On-Board Diagnostic) equipment is an important automotive testing tool. Its main function is to collect and monitor various operating data of the vehicle in real time by connecting to the vehicle's OBD diagnostic interface, including key information such as engine status, exhaust emissions, and sensor signals. It then performs professional diagnostic analysis on this data to accurately determine the vehicle's operating status and potential faults.

[0003] In practical applications, OBD diagnostic devices are relatively easy to use; simply plug the OBD connector into the vehicle's OBD diagnostic interface to establish a data communication link between the device and the vehicle. However, in related technologies, the connection stability between the OBD connector of the OBD diagnostic device and the vehicle's OBD diagnostic interface is poor, especially during actual driving. Vehicles inevitably encounter various road conditions during driving, such as bumps and vibrations. These external interferences continuously act on the connection between the OBD connector and the diagnostic interface, easily leading to instability issues such as loosening of the OBD connector. This instability affects the reliability of the OBD diagnostic device. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in related technologies. Therefore, the purpose of this utility model is to provide an OBD plug, an OBD cable, and an on-board OBD diagnostic device.

[0005] To achieve the above objectives, in a first aspect, according to an embodiment of the present invention, an OBD plug is used for connection to a vehicle OBD diagnostic interface, wherein the vehicle OBD diagnostic interface has an electrical connector, and the OBD plug includes:

[0006] Base;

[0007] An interface socket is provided on the base, and one end of the interface socket away from the base is open to form a socket. The inner wall of the interface socket is provided with a snap hole that engages with a snap fastener on the electrical connector.

[0008] Multiple pins are provided in the socket for insertion into pin holes on the electrical connector when the interface socket is inserted into the vehicle OBD diagnostic interface;

[0009] The interface seat has a chamfered inner edge at the end away from the base, and an inwardly protruding rib on the inner wall of the interface seat. The rib extends along the depth direction of the insertion port, and a beveled guide surface is provided at the end of the rib adjacent to the chamfer to guide the interface seat into the vehicle OBD diagnostic interface.

[0010] In addition, the OBD plug according to the above embodiments of the present invention may also have the following additional technical features:

[0011] According to one embodiment of the present invention, the inner wall of the interface seat includes two opposing inner sidewalls, each inner sidewall being provided with at least two ribs, the two ribs being arranged parallel to each other and spaced apart.

[0012] According to one embodiment of the present invention, the inclined guide surface intersects with the inner wall or chamfer of the interface seat.

[0013] According to one embodiment of the present invention, the interface seat is further provided with a positioning tongue, which extends away from the base along the depth direction of the socket, and the positioning tongue is adapted to be inserted into the positioning hole on the electrical connector when the interface seat is inserted into the vehicle OBD diagnostic interface.

[0014] According to one embodiment of the present invention, a circuit board is further provided inside the base, and a light source is provided on the circuit board. The light source is opposite to the positioning tongue, and the positioning tongue is made of a light-transmitting material so that the light emitted by the light source can be emitted through the positioning tongue.

[0015] According to one embodiment of the present invention, one end of the base is provided with a boss, and the end of the interface seat away from the socket is provided with a groove. The boss and the groove are positioned and engaged, and the base and the end of the interface seat away from the socket are wrapped together by a rubber shell to form an integral unit.

[0016] According to one embodiment of the present invention, the end of the interface seat away from the socket is provided with an annular groove, the annular groove surrounds the outer surface of the interface seat, and the rubber shell covers the annular groove.

[0017] According to one embodiment of the present invention, the height of the rib protruding from the inner wall of the interface seat is 0.5mm to 2.0mm.

[0018] Secondly, according to an embodiment of the present invention, the OBD cable includes a cable body and an OBD plug as described above, wherein the OBD plug is disposed at one end of the cable body.

[0019] Thirdly, according to an embodiment of the present invention, the vehicle-mounted OBD diagnostic device includes a device host and an OBD cable, one end of the OBD cable being connected to the device host, and the other end of the OBD cable having an OBD plug as described above.

[0020] According to the OBD plug, OBD cable, and vehicle OBD diagnostic device provided in this embodiment of the invention, the OBD plug has an inwardly protruding rib extending along the depth direction of the insertion port on the inner wall of the interface socket, with a beveled guide surface at its end. When the OBD plug is inserted into the vehicle's OBD diagnostic interface, the beveled guide surface guides the OBD plug to insert smoothly, and the rib can press against the outer surface of the electrical connector, achieving a tighter connection between the OBD plug and the vehicle's OBD diagnostic interface. Simultaneously, the locking holes on the inner wall of the interface socket and the latches on the electrical connector form a reliable mechanical lock. This improves the reliability of the connection between the OBD plug and the vehicle's OBD diagnostic interface, reduces loosening problems caused by vibration and impact during use, and enhances the operational reliability of the OBD diagnostic device in its application scenarios.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the OBD plug according to an embodiment of the present invention;

[0024] Figure 2 This is a top view of the OBD plug according to an embodiment of the present invention;

[0025] Figure 3 This is a cross-sectional view of the OBD plug according to an embodiment of this utility model;

[0026] Figure 4 This is an exploded view of the OBD plug according to an embodiment of this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the OBD diagnostic device according to an embodiment of the present invention.

[0028] Figure label:

[0029] 100. OBD plug;

[0030] 10. Base;

[0031] 101. Boss;

[0032] 102. Circuit board;

[0033] 103. Light source;

[0034] 20. Interface socket;

[0035] 201. Ribs;

[0036] 202. Positioning tongue;

[0037] H201, socket;

[0038] H202, card slot;

[0039] H2O3, annular groove;

[0040] S20, chamfer;

[0041] S21, Inclined guide surface;

[0042] 30. Stitches;

[0043] 40. Rubber-coated shell;

[0044] 200. OBD cable;

[0045] 300. Equipment host.

[0046] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0048] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] The following describes in detail, with reference to the accompanying drawings, an OBD plug 100, an OBD cable 200, and an on-board OBD diagnostic device according to embodiments of the present invention.

[0053] Reference Figures 1 to 4As shown, the OBD plug 100 provided according to the embodiment of the present utility model is used to connect to the vehicle OBD diagnostic interface. The vehicle OBD diagnostic interface has an electrical connector, which is used to connect with the OBD plug 100 to form electrical conduction. The OBD plug 100 includes a base 10, an interface seat 20 and a plurality of pins 30.

[0054] Specifically, the base 10 can be injection molded from high-strength engineering plastics, possessing excellent mechanical strength and durability. The shape of the base 10 can be designed as square or other irregular structures according to actual application requirements, ensuring strength while facilitating user grip and operation.

[0055] An interface socket 20 is mounted on the base 10, with one end of the interface socket 20 away from the base 10 open to form a socket H201. The inner wall of the interface socket 20 has a locking hole H202 that engages with the latch on the electrical connector. The interface socket 20 is also made of high-strength engineering plastic. The interface socket 20 and the base 10 can be connected using various methods such as snap-fit, thermal riveting, or screw fastening. The socket H201 at the end of the interface socket 20 away from the base 10 is used to mate with the electrical connector inside the vehicle's OBD diagnostic interface, accepting the insertion of the electrical connector. The locking hole H202 on the inner wall of the interface socket 20 corresponds to the latch on the electrical connector to ensure accurate engagement. When the interface socket 20 is inserted into the vehicle OBD diagnostic interface, the electrical connector in the vehicle OBD diagnostic interface is also inserted into the socket H201 of the OBD plug 100, and the buckle on the outer surface of the electrical connector engages with the locking hole H202 of the OBD plug 100.

[0056] Multiple pins 30 are disposed within the socket H201 for engagement with the pin holes 30 on the electrical connector when the interface holder 20 is inserted into the vehicle OBD diagnostic interface. The arrangement and number of pins 30 must conform to OBD standard specifications, typically using a two-row arrangement. The pins 30 can be secured using an insert injection molding process to ensure stability. When the interface holder 20 is inserted into the vehicle OBD diagnostic interface, the pins 30 in the interface holder 20 precisely engage with the pin holes 30 on the electrical connector, forming an electrical connection.

[0057] The inner edge of the interface seat 20 away from the base 10 is provided with a chamfer S20. For example, the angle is between 30 and 45 degrees. This angle range can provide a good insertion guidance effect, so that the interface seat 20 can be smoothly inserted into the vehicle OBD diagnostic interface.

[0058] The inner wall of the interface seat 20 is provided with inwardly protruding ribs 201, which extend along the depth direction of the insertion port H201. One end of the rib 201 adjacent to the chamfer S20 is provided with a beveled guide surface S21 to guide the interface seat 20 into the vehicle OBD diagnostic interface. The ribs 201 can be designed as multiple evenly distributed ribs, and their cross-sectional shape can be rectangular, triangular, trapezoidal, or arc-shaped. The protrusion height of the ribs 201 on the inner wall of the interface seat 20 should not be too high, ensuring that the interface seat 20 can be inserted into the vehicle OBD diagnostic interface. Preferably, the protrusion height of the ribs 201 on the inner wall of the interface seat 20 is 0.5mm to 2.0mm. The function of the rib 201 is to provide a compression allowance. Since the size and shape of the socket H201 are adapted to the shape and size of the electrical connector, when the interface seat 20 is inserted into the vehicle OBD diagnostic interface, the outer surface of the electrical connector contacts the rib 201, and the rib 201 is compressed during insertion, resulting in a tight contact between the rib 201 and the outer surface of the electrical connector, thereby improving the reliability of the insertion between the electrical connector and the interface seat 20. In addition, since the rib 201 has a certain height, in order to facilitate the insertion of the electrical connector into the interface, a beveled guide surface S21 is provided on one end of the rib 201 near the chamfer S20. During the insertion process, the guiding effect of the beveled guide surface S21 allows the electrical connector to be smoothly inserted into the socket H201.

[0059] According to the OBD plug 100 provided in this embodiment of the present invention, the inner wall of the interface base 20 is provided with an inwardly protruding rib 201 extending along the depth direction of the insertion port H201, and an inclined guide surface S21 is provided at its end. When the OBD plug 100 is inserted into the vehicle's OBD diagnostic interface, the inclined guide surface S21 guides the OBD plug 100 to be inserted smoothly, and the rib 201 can press against the outer surface of the electrical connector, achieving a tighter insertion between the OBD plug 100 and the vehicle's OBD diagnostic interface; at the same time, the locking hole H202 provided on the inner wall of the interface base 20 forms a reliable mechanical lock with the latch on the electrical connector. In this way, the reliability of the connection between the OBD plug 100 and the vehicle's OBD diagnostic interface is improved, the loosening problem caused by vibration and impact during use is reduced, and the working reliability of the OBD diagnostic equipment in its usage scenario is improved.

[0060] Reference Figure 2 As shown, in some embodiments of the present invention, the inner wall of the interface seat 20 includes two opposing inner sidewalls, each inner sidewall being provided with at least two ribs 201, the two ribs 201 being arranged parallel to each other and spaced apart.

[0061] In this embodiment, the relative arrangement of the ribs 201 ensures that during the insertion process, the opposing ribs 201 act on the opposing surfaces of the electrical connector, pressing them together inwards and adhering them to the electrical connector, thereby ensuring reliable insertion. Furthermore, the parallel arrangement of multiple ribs 201 ensures a more uniform pressure distribution when in contact with the electrical connector, further improving the reliability of the insertion.

[0062] Preferably, the inclined guide surface S21 intersects with the inner wall or chamfer S20 of the interface seat 20. When the inclined guide surface S21 intersects with the inner wall of the interface seat 20, a smooth transition region is formed from the inner wall of the interface seat 20 to the inclined guide surface S21 of the rib 201; when the inclined guide surface S21 intersects with the chamfer S20, a smooth transition region is formed from the chamfer S20 to the inclined guide surface S21 of the rib 201. Both of these intersection methods ensure the continuity and smoothness of the guiding process, thereby ensuring effective guidance of the insertion of the electrical connector.

[0063] Reference Figure 1 , Figure 2 and Figure 4 As shown, in one embodiment of the present invention, the interface seat 20 is further provided with a positioning tongue 202. The positioning tongue 202 extends away from the base 10 along the depth direction of the socket H201, and the positioning tongue 202 is adapted to be inserted into the positioning hole on the electrical connector when the interface seat 20 is inserted into the vehicle OBD diagnostic interface.

[0064] The positioning tongue 202 is positioned and sized to match the positioning holes on the electrical connector. When the OBD plug 100 is inserted into the vehicle's OBD diagnostic interface, the positioning tongue 202 gradually enters the corresponding positioning hole on the electrical connector as the interface seat 20 is inserted. This design of the positioning tongue 202 and the positioning hole plays an important guiding and positioning role during the insertion process. The presence of the positioning tongue 202 not only ensures that the interface seat 20 maintains the correct orientation and posture during insertion, but also provides additional mechanical restraint after full insertion, as the tight fit between the positioning tongue 202 and the positioning hole prevents the interface seat 20 from shifting in any direction.

[0065] In other words, the cooperation between the positioning tongue 202 and the positioning hole ensures that the pin 30 can be accurately aligned and smoothly inserted into the pin 30 hole. Moreover, after full insertion, it works synergistically with the squeezing action of the rib 201 and the locking action of the buckle to provide stable and reliable mechanical constraints, thereby improving the vibration and impact resistance of the OBD plug 100 in actual use.

[0066] Reference Figure 4As shown, in some embodiments of this utility model, a circuit board 102 is also provided inside the base 10. A light source 103 is provided on the circuit board 102, and the light source 103 is opposite to the positioning tongue 202. The positioning tongue 202 is made of a light-transmitting material so that the light emitted by the light source 103 can pass through the positioning tongue 202. It is understood that in specific applications, the OBD plug 100 is used in diagnostic equipment, and the power supply for the light source 103 on the circuit board 102 can be powered by the diagnostic equipment. Commonly used light-transmitting materials can be plastics such as PC (polycarbonate) or PMMA (acrylic), which not only have excellent light transmittance but also sufficient mechanical strength and durability.

[0067] Because the interior of a vehicle is dimly lit and the vehicle's OBD diagnostic interface is relatively concealed, it is difficult for users to accurately insert the OBD plug 100 into the vehicle's OBD diagnostic interface. Therefore, in this embodiment, a circuit board 102 is provided inside the base 10, and a light source 103 is provided on the circuit board 102. During the insertion process, the light source 103 can be turned on to provide illumination, allowing the user to quickly and accurately insert the OBD plug 100 into the vehicle's OBD diagnostic interface.

[0068] Reference Figure 3 and Figure 4 As shown, in one embodiment of the present invention, one end of the base 10 is provided with a boss 101, and the end of the interface seat 20 away from the socket H201 is provided with a groove. The boss 101 and the groove are positioned and engaged, and the base 10 and the end of the interface seat 20 away from the socket H201 are wrapped together by a rubber shell 40 to form an integral unit.

[0069] In this embodiment, the engagement of the boss 101 and the groove forms a positioning structure, ensuring that the base 10 and the interface seat 20 maintain the correct relative position during assembly. Furthermore, after the boss 101 and the groove are properly positioned, a rubber-coated shell 40 is used to completely cover the end of the base 10 and the interface seat 20 furthest from the socket H201. This rubber-coating process can be achieved by injection molding to firmly encapsulate the base 10 and the interface seat 20 together, forming an integrated structure. Through the positioning engagement of the boss 101 and the groove combined with the rubber-coated shell 40 process, a more reliable connection between the base 10 and the interface seat 20 is achieved, and a reliable sealing effect is formed at the connection point, effectively preventing the intrusion of external moisture and dust. This integrated structure greatly improves the structural strength and sealing performance of the product, enabling the OBD plug 100 to maintain stable mechanical and electrical performance during long-term use, while also enhancing the overall texture and appearance.

[0070] Reference Figure 3 and Figure 4 As shown, in one embodiment of the present invention, the interface seat 20 is provided with an annular groove H203 at one end away from the socket H201. The annular groove H203 surrounds the outer surface of the interface seat 20, and the rubber shell 40 covers the annular groove H203.

[0071] During the overmolding process, the injection-molded material fills and covers the annular groove H203, creating a mechanically interlocking structure between the overmolded shell 40 and the interface seat 20. This design differs from simple surface covering; the annular groove H203 increases the contact area and mechanical engagement strength between the materials. During injection molding, the overmolded shell 40 material completely fills along the contour of the annular groove H203, forming a strong mechanical connection after curing, significantly improving the bonding strength and reliability between the overmolded shell 40 and the interface seat 20.

[0072] This utility model embodiment also provides an OBD cable 200, including a cable body and an OBD plug 100 as described above, wherein the OBD plug 100 is disposed at one end of the cable body.

[0073] Reference Figure 5 As shown, this utility model embodiment also provides an on-board OBD diagnostic device, including a device host 300 and an OBD cable 200. One end of the OBD cable 200 is connected to the device host 300, and the other end of the OBD cable 200 has an OBD plug 100 as described above.

[0074] According to the OBD cable 200 and vehicle OBD diagnostic equipment provided in this embodiment of the present invention, the OBD plug 100 has an inwardly protruding rib 201 on the inner wall of the interface base 20 extending along the depth direction of the insertion port H201, and a beveled guide surface S21 is provided at its end. When the OBD plug 100 is inserted into the vehicle OBD diagnostic interface, the guide surface S21 guides the OBD plug 100 to be inserted smoothly, and the rib 201 can press against the outer surface of the electrical connector, achieving a tighter connection between the OBD plug 100 and the vehicle OBD diagnostic interface; at the same time, the locking hole H202 provided on the inner wall of the interface base 20 forms a reliable mechanical lock with the buckle on the electrical connector. This improves the reliability of the connection between the OBD plug 100 and the vehicle OBD diagnostic interface, reduces loosening problems caused by vibration and impact during use, and enhances the operational reliability of the OBD diagnostic equipment in its application scenarios.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An OBD plug for connecting to a vehicle OBD diagnostic interface, wherein the vehicle OBD diagnostic interface has an electrical connector, characterized in that, include: Base; An interface socket is provided on the base, and one end of the interface socket away from the base is open to form a socket. The inner wall of the interface socket is provided with a snap hole that engages with a snap fastener on the electrical connector. Multiple pins are provided in the socket for insertion into pin holes on the electrical connector when the interface socket is inserted into the vehicle OBD diagnostic interface; The interface seat has a chamfered inner edge at the end away from the base, and an inwardly protruding rib on the inner wall of the interface seat. The rib extends along the depth direction of the insertion port, and a beveled guide surface is provided at the end of the rib adjacent to the chamfer to guide the interface seat into the vehicle OBD diagnostic interface.

2. The OBD plug according to claim 1, characterized in that, The inner wall of the interface seat includes two opposing inner sidewalls, each inner sidewall having at least two ribs, the two ribs being arranged parallel to each other and spaced apart.

3. The OBD plug according to claim 1, characterized in that, The inclined guide surface intersects with the inner wall or chamfer of the interface seat.

4. The OBD plug according to claim 1, characterized in that, The interface socket is also provided with a positioning tongue, which extends along the depth direction of the socket to the end away from the base, and the positioning tongue is adapted to be inserted into the positioning hole on the electrical connector when the interface socket is inserted into the vehicle OBD diagnostic interface.

5. The OBD plug according to claim 4, characterized in that, The base is also equipped with a circuit board, on which a light source is mounted. The light source is opposite to the positioning tongue, and the positioning tongue is made of a light-transmitting material so that the light emitted by the light source can pass through the positioning tongue.

6. The OBD plug according to claim 4, characterized in that, One end of the base is provided with a boss, and the end of the interface seat away from the socket is provided with a groove. The boss and the groove are positioned and engaged, and the ends of the base and the interface seat away from the socket are wrapped together by a rubber shell to form an integral unit.

7. The OBD plug according to claim 6, characterized in that, The interface seat has an annular groove at one end away from the socket, the annular groove surrounds the outer surface of the interface seat, and the rubber shell covers the annular groove.

8. The OBD plug according to any one of claims 1 to 7, characterized in that, The height of the rib protruding from the inner wall of the interface seat is 0.5mm to 2.0mm.

9. An OBD cable, characterized in that, It includes a cable body and an OBD plug as described in any one of claims 1 to 8, wherein the OBD plug is disposed at one end of the cable body.

10. A vehicle-mounted OBD diagnostic device, characterized in that, It includes a device host and an OBD cable, one end of which is connected to the device host, and the other end of which has an OBD plug as described in any one of claims 1 to 8.

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