An OBD diagnostic connector

Abstract

The present application relates to an OBD diagnostic connector, which includes: a diagnostic connector shell body; a plurality of conductive holes, which are arranged side by side in the diagnostic connector shell body, and a conductive rod is arranged in the conductive hole; the conductive rod is connected to an input pin line, and the input pin line is connected to a pin; a conductive sheet, which is arranged in the diagnostic connector shell body and is spaced apart from the plurality of conductive holes, and the conductive sheet is connected to an output pin line; two pin switching devices, which are arranged between the conductive holes and the conductive sheet, and are used to selectively connect a plurality of input pin lines to the output pin line. When in use, the plurality of input pin lines are selectively connected to the output pin line to meet a variety of usage requirements, so as to solve the problem that there are certain differences in the definitions of the pins of each interface by manufacturers, resulting in the problem of inapplicability.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to an OBD diagnostic connector. Background Art

[0002] At present, in the process of automobile development, automobile manufacturers need to set up an interface for accessing the electrical / electronic system (hereinafter referred to as the "OBD diagnostic interface") at an appropriate location in the car so that engineers can use the OBD cable to access the CAN communication network composed of various electronic controllers; OBD stands for On Board Diagnostics, which is translated into Chinese as: On Board Diagnostics System "OBDII" is "on Board Diagnostics II", which is the abbreviation of the II type on-board diagnostic system. In order to standardize the diagnosis of automobile emission and drive-related faults. With the increasing degree of economic globalization and automobile internationalization, the OBDII system will be more and more widely implemented and applied as the basis for drive and emission diagnosis. The OBDII program makes automobile fault diagnosis simple and unified, and maintenance personnel do not need to learn the new system of each manufacturer.

[0003] In some related technologies, one end of the OBD cable is usually a DB9 connector, and the other end is an OBD diagnostic connector that matches the vehicle's OBD diagnostic interface. Since different manufacturers have different definitions of the pins of each interface, the existing wiring harness cannot adapt to the definitions of all interfaces during use; during the development process, it is easy to encounter problems with the vehicle due to the lack of corresponding pin definitions in the wiring harness, and data cannot be collected, making it difficult to analyze and promote the fault.

[0004] Therefore, there is an urgent need to provide an OBD diagnostic connector to solve the problem of lack of corresponding pin definition in the wiring harness when vehicle problems occur during the development process. Summary of the invention

[0005] An embodiment of the present application provides an OBD diagnostic connector to solve the problem in the related art that when a vehicle problem occurs during the development process, the wiring harness lacks corresponding pin definitions.

[0006] In a first aspect, an OBD diagnostic connector is provided, comprising:

[0007] Diagnostic connector shell body;

[0008] A plurality of conductive holes are arranged side by side in the diagnostic connector housing body, and conductive rods are arranged in the conductive holes; the conductive rods are connected to input pins, and the input pins are connected to the pins;

[0009] A conductive sheet, which is arranged in the diagnostic connector housing body and spaced apart from the plurality of conductive holes, and is connected to an output pin line;

[0010] Two pin switching devices are arranged between the conductive hole and the conductive sheet and are used to selectively connect a plurality of input pin lines to the output pin lines.

[0011] In some embodiments, the two pin switching devices are distributed in the width direction of the diagnostic connector housing body;

[0012] The two pin switching devices are independently connected to a group of corresponding output pin lines and input pin lines.

[0013] In some embodiments, a slide groove is provided on the diagnostic connector housing body;

[0014] The pin switching device comprises:

[0015] A plurality of elastic limiting components are distributed along a straight line and can be moved under pressure in a direction perpendicular to the straight line; an elastic limiting component is arranged between two adjacent conductive rods; a clamping space is arranged between two adjacent elastic limiting components, and the conductive rod extends into the clamping space;

[0016] The conductive ball is selectively engaged with the engaging space and connects the conductive rod in contact with the conductive sheet;

[0017] The paddle is connected to the conductive ball, passes through the slide groove, and extends outside the diagnosis connector shell body.

[0018] In some embodiments, the elastic limiting component includes:

[0019] The card holder has a horizontal top and a cross-sectional area that gradually decreases from the top downwards. The card holder is provided with arc contact surfaces adapted to the conductive ball on both sides of its periphery; the two arc contact surfaces are symmetrically arranged with the central axis of the card holder as the symmetry axis; the arc contact surfaces of two adjacent elastic limit assemblies form the card connection space; the top of the card holder and the bottom end of the conductive rod are located on the same horizontal plane;

[0020] A connecting shaft connects the card seat to the diagnostic connector shell body through an elastic member.

[0021] In some embodiments, a receiving groove is provided on the diagnostic connector shell body, and the elastic member is arranged in the receiving groove; an end of the connecting shaft away from the socket extends into the receiving groove and is connected to the elastic member.

[0022] In some embodiments, the elastic member is a spring or rubber.

[0023] In some embodiments, the pin switching device includes:

[0024] A fixed ring, which is fixed in the diagnostic connector housing body;

[0025] A plurality of conductive arc pieces are distributed in a circular shape on the inner wall of the fixed circular ring, and the circle formed by the distribution tracks is concentric with the fixed circular ring; each conductive arc piece is connected to a corresponding conductive rod; and the plurality of conductive arc pieces are insulated and connected to each other.

[0026] A conductive seat is concentrically arranged in the fixed ring; the outer side of the conductive seat is connected to the output pin line;

[0027] The conductive abutting member is drivingly connected to the conductive seat and selectively abuts against a plurality of conductive circular arc pieces.

[0028] In some embodiments, the conductive abutment member includes:

[0029] The rotating shaft, at its central axis and at its bottom, is concave upward to form a circular groove;

[0030] A conductive center rod is disposed in the circular groove and fixedly connected to the conductive seat;

[0031] The conductive protrusion is installed on the rotating shaft, and one end of the conductive protrusion is connected to the conductive center rod, and the other end of the conductive protrusion is abutted against the conductive arc piece.

[0032] In some embodiments, the rotating member further includes a guide groove, which is formed on the circumference of the rotating shaft, and the guide groove is perpendicular to and connected to the circular groove;

[0033] The conductive protrusion passes through the guide groove and is connected to the rotating shaft through a spring; when the spring is compressed, the bottom of the conductive protrusion contacts the top of the conductive center rod.

[0034] In some embodiments, the rotating member further comprises a guide groove, which is formed on the circumference of the rotating shaft, and the guide groove is perpendicular to and connected to the circular groove; a conductive pad is provided in the guide groove; and the conductive pad is connected to the top of the conductive center rod;

[0035] The conductive protrusion passes through the guide groove and is connected with the rotating shaft through a spring; the conductive protrusion is slidably arranged on the top of the conductive pad.

[0036] The beneficial effects of the technical solution provided by this application include:

[0037] The embodiment of the present application provides an OBD diagnostic connector. Since the conductive hole and the conductive sheet are arranged at intervals in the diagnostic connector shell body, and the conductive hole and the conductive sheet are respectively connected to the input pin line and the output pin line, two pin switching devices are arranged between the conductive hole and the conductive sheet. When in use, multiple input pin lines are selectively connected to the output pin line to meet various usage requirements, so as to solve the problem that there are certain differences in the definitions of each interface pin by manufacturers, resulting in inapplicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A schematic diagram of the principle of a pin switching device provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of an OBD diagnostic connector of a first structure provided in an embodiment of the present application;

[0041] Figure 3 A schematic diagram of the internal structure of a pin switching device provided in an embodiment of the present application;

[0042] Figure 4 A schematic diagram of a conductive ball provided in an embodiment of the present application;

[0043] Figure 5 Provided for the embodiments of this application Figure 3 A schematic diagram of the structure of the middle elastic limiter assembly;

[0044] Figure 6 A schematic diagram of an OBD diagnostic connector of a second structure provided in an embodiment of the present application;

[0045] Figure 7 A schematic diagram of the internal structure of a pin switching device of another structure provided in an embodiment of the present application;

[0046] Figure 8 Provided for the embodiments of this application Figure 7 Schematic diagram of the internal structure of the conductive supporting member.

[0047] In the figure: 1. diagnostic connector shell body; 100. accommodating groove; 2. conductive hole; 3. conductive rod; 4. input pin line; 5. conductive sheet; 6. output pin line; 7. pin switching device; 70. elastic limit assembly; 700. card seat; 701. arc contact surface; 702. elastic member; 703. connecting shaft; 71. conductive ball; 72. paddle; 73. fixed ring; 74. conductive arc sheet; 75. conductive seat; 76. conductive supporting member; 760. rotating shaft; 761. conductive center rod; 762. conductive protrusion; 763. guide groove; 764. conductive pad; 8. slide groove. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0049] An embodiment of the present application provides an OBD diagnostic connector to solve the problem of an OBD diagnostic connector in the related art, which is easy to encounter during the development process of the related art when a vehicle problem occurs due to the lack of corresponding pin definition in the wiring harness.

[0050] See also Figure 1-Figure 8 , an OBD diagnostic connector, comprising a diagnostic connector shell body 1;

[0051] A plurality of conductive holes 2 are arranged side by side in the diagnostic connector housing body 1, and a conductive rod 3 is arranged in the conductive hole 2; the conductive rod 3 is connected to an input pin line 4; the input pin line 4 is connected to a pin;

[0052] A conductive sheet 5 is disposed in the diagnostic connector housing body 1 and is spaced apart from the plurality of conductive holes 2. The conductive sheet 5 is connected to an output pin line 6;

[0053] Two pin switching devices 7 are arranged between the conductive hole 2 and the conductive sheet 5, and are used to selectively connect the multiple input pins 4 to the output pins 6, so as to connect the multiple input pins 4 to the output pins 6 according to the use requirements. The use requirements can be understood as selecting one of the pins corresponding to the multiple input pins 4 to connect to the output pin 6.

[0054] thereby Figure 2 The direction indicated by the middle triangle can show the direction of transmission. Since the conductive hole 2 and the conductive sheet 5 are arranged in the diagnostic connector shell body 1 at intervals, and the conductive hole 2 and the conductive sheet 5 are respectively connected to the input pin line 4 and the output pin line 6, two pin switching devices 7 are arranged between the conductive hole 2 and the conductive sheet 5. When in use, the pin switching devices 7 are used to selectively connect multiple input pin lines 4 to the output pin line 6 according to needs, so that Figure 1 The 16 pins shown in the figure can all be connected to the output pin line 6 as required to solve the problem that there are certain differences in the definitions of the pins of each interface among manufacturers, resulting in the problem of inapplicability.

[0055] In some preferred embodiments, the two pin switching devices 7 have two structures:

[0056] The first type is that the two pin switching devices 7 are distributed in the width direction of the diagnostic connector shell body 1; the two pin switching devices 7 are individually connected to a group of corresponding output pin lines 6 and input pin lines 4.

[0057] Wherein, a slide groove 8 is provided on the diagnostic connector shell body 1;

[0058] The pin switching device 7 comprises:

[0059] A plurality of elastic limit assemblies 70 are distributed along a straight line and can be moved under pressure in a direction perpendicular to the straight line; an elastic limit assemblies 70 is arranged between two adjacent conductive rods 3; a clamping space is arranged between two adjacent elastic limit assemblies 70, and the conductive rod 3 extends into the clamping space; a conductive ball 71 selectively clamps with one of the clamping spaces and connects the conductive rod 3 in contact with it with the conductive sheet 5; a paddle 72 is connected to the conductive ball 71, the paddle 72 passes through a slide groove 8, and extends to the outside of the diagnostic connector shell body 1.

[0060] The elastic limiting assembly 70 includes:

[0061] The top of the card holder 700 is a horizontal plane, and the cross-sectional area gradually decreases from the top to the bottom. Arc contact surfaces 701 that are adapted to the conductive ball 71 are provided on both sides of the card holder 700; the two arc contact surfaces 701 are symmetrically arranged with the central axis of the card holder 700 as the symmetry axis; the arc contact surfaces 701 of two adjacent elastic limit assemblies 70 form a card connection space; the top of the card holder 700 and the bottom end of the conductive rod 3 are located on the same horizontal plane; a connecting shaft 703 connects the card holder 700 to the diagnostic connector shell body 1 through an elastic member 702.

[0062] The two adjacent elastic limit assemblies 70 press the conductive ball 71 into the card-joining space. When the paddle 72 connected to the conductive ball 71 is turned, the conductive ball 71 applies a force to the card holder 700. The force compresses the card holder 700 and the card-joining space is enlarged. The conductive ball 71 can enter the next card-joining space, and the conductive ball 71 realizes the conduction between the conductive rod 3 and the conductive sheet 5 there. The card holder 700 of the previous card-joining space is reset and restored to its original size. The previous conductive rod 3 cannot be turned on due to the displacement of the conductive ball 71, so that the two pin switching devices 7 can freely switch the conduction pins of the two output harnesses respectively.

[0063] Furthermore, a receiving groove 100 is provided on the diagnostic connector shell body 1, and an elastic member 702 is arranged in the receiving groove 100; one end of the connecting shaft 703 away from the socket 700 extends into the receiving groove 100 and is connected to the elastic member 702, and the elastic member 702 is a spring or rubber.

[0064] The second

[0065] A slide groove 8 is provided on the diagnostic connector housing body 1;

[0066] The pin switching device 7 comprises:

[0067] A fixed ring 73 is fixed in the diagnostic connector shell body 1; a plurality of conductive arc pieces 74 are distributed in a circular shape on the inner wall of the fixed ring 73, and the circle formed by their distribution trajectory is concentric with the fixed ring 73; each conductive arc piece 74 is connected to a corresponding conductive rod 3; the plurality of conductive arc pieces 74 are insulated and connected; the insulated connection can be understood as an insulating gasket or insulating glue coating between two adjacent conductive arc pieces 74. A conductive seat 75 is concentrically arranged in the fixed ring 73; the outer side of the conductive seat 75 is connected to the output pin line 6; a conductive abutment 76 is transmission-connected to the conductive seat 75, and selectively abuts against the plurality of conductive arc pieces 74, and the top of the conductive abutment 76 is penetrated to the outside of the diagnostic connector shell body 1 to facilitate rotation adjustment.

[0068] By rotating, multiple input pins 4 are selectively connected to the output pins 6. When necessary, in order to distinguish which pin is connected, the corresponding position of each conductive arc piece 74 can be marked on the diagnostic connector shell body 1 like setting a scale, which is convenient for use.

[0069] Further, the conductive abutment member 76 includes:

[0070] The rotating shaft 760 is recessed upward at its center axis and at its bottom to form a circular groove; the conductive center rod 761 is disposed in the circular groove and fixedly connected to the conductive seat 75; the conductive protrusion 762 is installed on the rotating shaft 760, and one end of the conductive protrusion is connected to the conductive center rod 761, and the other end is abutted against the conductive arc piece 74; such a structure realizes the function of conducting electricity during rotation.

[0071] Furthermore, there is a scheme in which the conductive protrusion 762 and the conductive center rod 761 are connected only after they are abutted in place, and the conductive protrusion 762 and the conductive center rod 761 are connected regardless of whether they are abutted or not. Therefore, the following settings are made:

[0072] First Form:

[0073] The conductive abutment member 76 further includes a guide groove 763, which is formed on the circumference of the rotating shaft 760, and the guide groove 763 is perpendicular to and connected to the circular groove;

[0074] The conductive protrusion 762 passes through the guide groove 763 and is connected to the rotating shaft 760 through a spring; when the spring is compressed, the bottom of the conductive protrusion 762 contacts the top of the conductive center rod 761.

[0075] Second Form

[0076] The conductive abutment member 76 further includes a guide groove 763, which is formed on the circumference of the rotating shaft 760, and the guide groove 763 is perpendicular to and connected to the circular groove; a conductive pad 764 is provided in the guide groove 763; and the conductive pad 764 is connected to the top of the conductive center rod 761;

[0077] The conductive protrusion 762 passes through the guide groove 763 and is connected to the rotating shaft 760 through a spring; the conductive protrusion 762 is slidably disposed on the top of the conductive pad 764 .

[0078] Principles of this application:

[0079] Since the conductive hole 2 and the conductive sheet 5 are arranged in the diagnostic connector shell body 1 at intervals, and the conductive hole 2 and the conductive sheet 5 are respectively connected to the input pin line 4 and the output pin line 6, two pin switching devices 7 are arranged between the conductive hole 2 and the conductive sheet 5. When in use, the pin switching devices 7 are used to selectively connect multiple input pin lines 4 to the output pin line 6 according to needs, so that Figure 1 The 16 pins shown in the figure can all be connected to the output pin line 6 as required to solve the problem that there are certain differences in the definitions of the pins of each interface among manufacturers, resulting in the problem of inapplicability.

[0080] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0081] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0082] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps of the functions specified in the box or multiple boxes. In a typical configuration, the computing device includes one or more processors (CPU), input / output interfaces, network interfaces and memory. The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0083] Computer readable media include permanent and non-permanent, removable and non-removable media and can store information by any method or technology. The information can be computer readable instructions, data structures, program modules or other data.

[0084] Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory media such as modulated data signals and carrier waves. It should also be noted that the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or apparatus. In the absence of more constraints, an element defined by the phrase "comprises a ..." does not exclude the existence of additional identical elements in the process, method, product or apparatus comprising the element.

[0085] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

[0086] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0087] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0088] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An OBD diagnostic connector, characterized in that: It includes: Diagnostic connector housing body (1); A plurality of conductive holes (2) are arranged side by side in the diagnostic connector housing body (1), and a conductive rod (3) is arranged in the conductive hole (2); the conductive rod (3) is connected to an input pin line (4), and the input pin line (4) is connected to a pin; A conductive sheet (5) disposed in the diagnostic connector housing body (1) and spaced apart from the plurality of conductive holes (2), the conductive sheet (5) being connected to an output pin line (6); Two pin switching devices (7) are arranged between the conductive hole (2) and the conductive sheet (5) and are used to selectively connect a plurality of input pin lines (4) to the output pin line (6); The diagnostic connector housing body (1) is provided with a slide groove (8); The pin switching device (7) comprises: A plurality of elastic limiting components (70) are distributed along a straight line and can be moved under pressure in a direction perpendicular to the straight line; an elastic limiting component (70) is arranged between two adjacent conductive rods (3); a clamping space is arranged between two adjacent elastic limiting components (70), and the conductive rod (3) extends into the clamping space; A conductive ball (71) selectively engages with one of the engaging spaces and connects the conductive rod (3) in contact with the conductive ball (71) to the conductive sheet (5); A paddle (72) is connected to the conductive ball (71), and the paddle (72) passes through the slide groove (8) and extends outside the diagnostic connector housing body (1).

2. The OBD diagnostic connector according to claim 1, characterized in that: The two pin switching devices (7) are distributed in the width direction of the diagnostic connector housing body (1); The two pin switching devices (7) are independently connected to a set of corresponding output pin lines (6) and input pin lines (4).

3. The OBD diagnostic connector according to claim 1, characterized in that: The elastic limiting component (70) comprises: The card holder (700) has a top which is a horizontal plane and a cross-sectional area which gradually decreases from the top downwards; arc contact surfaces (701) adapted to the conductive ball (71) are provided on both sides of the card holder (700); the two arc contact surfaces (701) are symmetrically arranged with the central axis of the card holder (700) as a symmetry axis; the arc contact surfaces (701) of two adjacent elastic limit assemblies (70) form the card connection space; the top of the card holder (700) and the bottom end of the conductive rod (3) are located on the same horizontal plane; A connecting shaft (703) connects the card seat (700) and the diagnostic connector housing body (1) via an elastic member (702).

4. The OBD diagnostic connector according to claim 3, characterized in that: The diagnostic connector housing body (1) is provided with a receiving groove (100), and the elastic member (702) is arranged in the receiving groove (100); an end of the connecting shaft (703) away from the holder (700) extends into the receiving groove (100) and is connected to the elastic member (702).

5. The OBD diagnostic connector according to claim 4, characterized in that: The elastic member (702) is a spring or rubber.

6. The OBD diagnostic connector according to claim 2, characterized in that: The pin switching device (7) comprises: A fixed ring (73) fixed inside the diagnostic connector housing body (1); A plurality of conductive circular arc pieces (74) are distributed in a circular shape on the inner wall of the fixed circular ring (73), and the circle formed by the distribution trajectory thereof is concentric with the fixed circular ring (73); each conductive circular arc piece (74) is correspondingly connected to one of the conductive rods (3); and the plurality of conductive circular arc pieces (74) are insulated from each other; A conductive seat (75) is concentrically arranged inside the fixed ring (73); the outer side of the conductive seat (75) is connected to the output pin line (6); A conductive abutting member (76) is drivingly connected to the conductive seat (75) and selectively abuts against a plurality of conductive circular arc pieces (74).

7. The OBD diagnostic connector according to claim 6, characterized in that: The conductive supporting member (76) comprises: The rotating shaft (760) is located at its central axis and at its bottom, and is concave upward to form a circular groove; A conductive center rod (761) is disposed in the circular groove and fixedly connected to the conductive seat (75); A conductive protrusion (762) is mounted on the rotating shaft (760), one end of which is connected to the conductive center rod (761) and the other end of which is abutted against the conductive circular arc sheet (74).

8. The OBD diagnostic connector according to claim 7, characterized in that: The conductive supporting member (76) further comprises a guide groove (763) which is formed on the circumference of the rotating shaft (760); the guide groove (763) is perpendicular to and communicates with the circular groove; The conductive protrusion (762) passes through the guide groove (763) and is connected to the rotating shaft (760) via a spring; when the spring is compressed, the bottom of the conductive protrusion (762) contacts the top of the conductive center rod (761).

9. The OBD diagnostic connector according to claim 7, characterized in that: The conductive supporting member (76) further comprises a guide groove (763) which is formed on the circumference of the rotating shaft (760), the guide groove (763) being perpendicular to and connected to the circular groove; a conductive pad (764) is provided in the guide groove (763); the conductive pad (764) is connected to the top of the conductive center rod (761); The conductive protrusion (762) passes through the guide groove (763) and is connected to the rotating shaft (760) via a spring; the conductive protrusion (762) is slidably disposed on the top of the conductive pad (764).

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