Vehicle diagnostic apparatus

Abstract

The utility model discloses a vehicle diagnostic instrument, including shell, circuit board and OBD plug, the top of shell is equipped with first lamp hole, and the bottom of shell is equipped with second lamp hole, circuit board is located in the shell, and the upper surface of circuit board is equipped with the first indicating lamp in first lamp hole, and the lower surface of circuit board is equipped with the second indicating lamp in second lamp hole, OBD plug is located in one end of shell and is connected with circuit board electrically, and the side wall of OBD plug has the location mouth that cooperates with the location protruding on the vehicle OBD interface, be equipped with a elastic pressing piece in location mouth, when OBD plug is inserted to the vehicle OBD interface, and the location protruding enters to location mouth, and the elastic pressing piece is embraced and buckled in the upper of location protruding, the utility model discloses a vehicle diagnostic instrument, and the reliability and stability of plug -in connection are higher, and effectively reduce the contact interruption problem due to the vibration in the process of vehicle operation and other factors, realize efficient, continuous, stable data acquisition and diagnostic function.

Description

Technical Field

[0001] This utility model relates to the field of vehicle diagnostic technology, and in particular to a vehicle diagnostic instrument. Background Technology

[0002] A vehicle diagnostic tool is an electronic device that integrates multiple testing functions, primarily used for quickly identifying and analyzing faults or abnormal conditions in a vehicle. In the automotive field, it interacts with the vehicle's electronic systems via onboard communication protocols (such as OBD-II) to help users efficiently perform fault diagnosis and maintenance.

[0003] In related technologies, vehicle diagnostic tools typically include a diagnostic body and an OBD plug located on the diagnostic body. The OBD plug is plugged into the vehicle's OBD interface. This simple plugging method has poor reliability, especially during vehicle start-up and driving, when vibrations can easily cause the connection between the vehicle diagnostic tool and the OBD interface to be interrupted. Such connection interruptions are not easily noticed by users, leading to interruptions in data acquisition and thus affecting vehicle diagnostics. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in the related art. Therefore, the purpose of this invention is to provide a vehicle diagnostic tool.

[0005] To achieve the above objectives, a vehicle diagnostic tool according to an embodiment of the present invention includes:

[0006] The outer casing has a first lamp hole on its top surface and a second lamp hole on its bottom surface.

[0007] The circuit board is disposed inside the housing. The upper surface of the circuit board is provided with a first indicator light located in the first lamp hole, and the lower surface of the circuit board is provided with a second indicator light located in the second lamp hole.

[0008] The OBD plug is located at one end of the housing and is electrically connected to the circuit board. One side wall of the OBD plug has a positioning port that mates with a positioning protrusion on the vehicle's OBD interface. An elastic pressure plate is provided in the positioning port. When the OBD plug is inserted into the vehicle's OBD interface, the positioning protrusion enters the positioning port, and the elastic pressure plate holds the top of the positioning protrusion.

[0009] According to the vehicle diagnostic instrument provided in this embodiment, an elastic pressure plate is provided inside the positioning port of the OBD plug. This allows the positioning protrusion on the OBD interface to be firmly fixed when the OBD plug is inserted into the vehicle's OBD interface, with the elastic pressure plate holding it above. This significantly improves the reliability and stability of the connection, effectively reducing contact interruption problems caused by factors such as vibration during vehicle operation, and achieving efficient, continuous, and stable data acquisition and diagnostic functions. Furthermore, by providing a first indicator light and a second indicator light at the top and bottom of the housing respectively, a clear working status display is achieved. Regardless of whether the vehicle diagnostic instrument is inserted face up or face down, one of the first and second indicator lights can be directly observed. In case of connection interruption or other operational abnormalities, the status of the first or second indicator light can be used to promptly identify the problem and take timely measures, thereby ensuring the normal operation of data acquisition and diagnostic functions and improving the reliability of the vehicle diagnostic instrument's performance and user experience.

[0010] In addition, the vehicle diagnostic tool according to the above embodiments of this utility model may also have the following additional technical features:

[0011] According to one embodiment of the present invention, the elastic pressure plate includes a fixing section and a snap-fit ​​section. The fixing section is fixed to the OBD plug, and the snap-fit ​​section is connected to the fixing section and is located in the positioning hole. After being bent, the snap-fit ​​section protrudes outward from the OBD plug, and a snap-fit ​​groove suitable for engaging with the positioning protrusion is formed in the snap-fit ​​section.

[0012] According to one embodiment of the present invention, the cross-section of the engaging groove in the insertion direction of the OBD plug is trapezoidal or triangular.

[0013] According to one embodiment of the present invention, the OBD plug includes a plug socket and a connector. One end of the plug socket is fixedly connected to the housing, and the other end of the plug socket has a insertion cavity. The connector is disposed in the insertion cavity.

[0014] The positioning port is located on the side wall of the plug cavity, and the positioning port has an open side, which is located on the plug socket at the end away from the outer shell.

[0015] According to one embodiment of the present invention, the end of the buckle segment away from the fixing segment has a folded edge that bends outward toward the OBD plug to guide the insertion of the positioning protrusion.

[0016] According to one embodiment of the present invention, the outer shell includes an upper shell and a lower shell, the upper shell and the lower shell being interlocked and fixed by threaded fasteners;

[0017] The plug socket has a slot at one end away from the positioning port, and the slot surrounds the outer surface of the plug socket circumferentially; one end of the upper shell has a downward protruding upper retaining edge, and one end of the lower shell has an upward protruding lower retaining edge, and the upper retaining edge and the lower retaining edge engage in the slot to fix the plug socket to the outer shell.

[0018] According to one embodiment of the present invention, a first lamp cap is provided in the first lamp hole, and a second lamp cap is provided in the second lamp hole, wherein the first lamp cap and the second lamp cap are different colors.

[0019] According to one embodiment of the present invention, there are two first indicator lights and two second indicator lights, with the two first indicator lights spaced apart and the two second indicator lights spaced apart.

[0020] According to one embodiment of the present invention, the OBD plug further includes an interface board, the connector is connected to the interface board, the interface board is located inside the housing, and the interface board is provided with an adapter, the interface board being signal-connected to the circuit board through the adapter.

[0021] According to one embodiment of the present invention, the outer shell is provided with grip grooves on both sides for users to grip and operate.

[0022] 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

[0023] 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.

[0024] Figure 1 This is a structural schematic diagram of the vehicle diagnostic instrument according to an embodiment of the present invention from one perspective;

[0025] Figure 2 This is a structural schematic diagram of the vehicle diagnostic instrument according to another embodiment of the present invention;

[0026] Figure 3 This is an exploded view of the vehicle diagnostic instrument according to an embodiment of this utility model;

[0027] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0028] Figure 5 This is an exploded view of the vehicle diagnostic instrument according to an embodiment of this utility model.

[0029] Figure label:

[0030] 10. Outer casing;

[0031] 101. Upper shell;

[0032] H101, First lamp hole;

[0033] 1011, First Lamp Hat;

[0034] 102. Lower shell;

[0035] H102, Second lamp hole;

[0036] 1021, Second lamp cap;

[0037] 1022. Lower edge of the card;

[0038] H103, grip groove;

[0039] 20. Circuit board;

[0040] 201. First indicator light;

[0041] 30. OBD plug;

[0042] 301. Plug and socket;

[0043] 302. Connector;

[0044] 303. Interface board;

[0045] H301, Card slot;

[0046] H302, Positioning port;

[0047] 31. Elastic compression tablets;

[0048] 311. Fixed section;

[0049] 312. Buckle section;

[0050] 313. Folded edge.

[0051] 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

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] The vehicle diagnostic instrument of this utility model embodiment is described in detail below with reference to the accompanying drawings.

[0058] Reference Figures 1 to 5 As shown, the vehicle diagnostic tool provided according to the embodiment of the present invention includes a housing 10, a circuit board 20, and an OBD plug 30.

[0059] Specifically, the top surface of the housing 10 is provided with a first lamp hole H101, and the bottom surface of the housing 10 is provided with a second lamp hole H102. The housing 10 can be made of high-strength plastic or metal materials, such as ABS plastic, ABS and PC composite materials, hardware and plastic composite materials, etc.

[0060] The circuit board 20 is disposed inside the housing 10. The upper surface of the circuit board 20 is provided with a first indicator light 201 located in the first lamp hole H101, and the lower surface of the circuit board 20 is provided with a second indicator light located in the second lamp hole H102.

[0061] The OBD interface on a vehicle typically has a trapezoidal cross-section. The orientation of the OBD interface varies between vehicles; on some vehicles, the long side of the trapezoid faces upwards, while on others, the short side faces upwards. Therefore, the insertion direction of the vehicle diagnostic tool also differs depending on the vehicle—for example, the front of the diagnostic tool may face upwards, or the back may face upwards, to match the OBD interface orientation. If an indicator light is only provided on one side of the housing 10, when the diagnostic tool is inserted in another direction, the indicator light may be located at the bottom of the diagnostic tool, while the vehicle's OBD interface is usually in a relatively concealed position. In this case, the indicator light cannot be observed.

[0062] In this application, a first indicator light 201 and a second indicator light are respectively provided on the front and back of the vehicle diagnostic tool, so that the working status of at least one indicator light can always be observed regardless of whether the vehicle diagnostic tool is inserted and installed face up or face down, thereby providing the user with intuitive status feedback. In the event of a fault, the user can promptly identify the problem and take appropriate measures by observing the changes in the indicator light status.

[0063] The OBD plug 30 is located at one end of the housing 10 and is electrically connected to the circuit board 20. One side wall of the OBD plug 30 has a positioning port H302 that mates with a positioning protrusion on the vehicle's OBD interface. An elastic pressure plate 31 is provided in the positioning port H302. When the OBD plug 30 is inserted into the vehicle's OBD interface, the positioning protrusion enters the positioning port H302, and the elastic pressure plate 31 holds the top of the positioning protrusion.

[0064] The elastic clamping plate 31 can be made of stainless steel or other metal. When the OBD plug 30 is plugged into the vehicle's OBD interface, the positioning protrusion on the OBD interface can smoothly enter the positioning port H302. At the same time, the elastic clamping plate 31 automatically clamps onto the positioning protrusion, making it difficult for the positioning protrusion to fall out of the positioning port H302. Meanwhile, the elastic clamping plate 31 provides a continuous elastic clamping effect, reducing unstable factors such as shaking between the two, improving the reliability of the connection between them, and effectively reducing connection interruptions caused by vibrations during vehicle startup and driving.

[0065] According to the vehicle diagnostic instrument provided in this embodiment of the present invention, an elastic pressure plate 31 is provided inside the positioning port H302 of the OBD plug 30. This allows the positioning protrusion on the OBD interface to be firmly fixed when the OBD plug 30 is inserted into the vehicle's OBD interface, with the elastic pressure plate 31 holding it above. This significantly improves the reliability and stability of the connection, effectively reducing contact interruption problems caused by factors such as vibration during vehicle operation, and achieving efficient, continuous, and stable data acquisition and diagnostic functions. Furthermore, by providing a first indicator light 201 and a second indicator light at the top and bottom of the housing 10 respectively, an intuitive working status display is achieved. Regardless of whether the vehicle diagnostic instrument is inserted face up or face down, one of the first indicator light 201 and the second indicator light can be directly observed. In case of connection interruption or other operational abnormalities, the status of the first indicator light 201 or the second indicator light can be used to promptly identify the problem and take timely measures, thereby ensuring the normal operation of data acquisition and diagnostic functions, improving the reliability of the vehicle diagnostic instrument's performance and user experience.

[0066] Reference Figure 4As shown, in one embodiment of this utility model, the elastic pressure plate 31 includes a fixing section 311 and a snap-fit ​​section 312. The fixing section 311 is fixed to the OBD plug 30. The fixing section 311 can be fixed to the OBD plug 30 by injection molding, snap-fit ​​or other methods.

[0067] The buckle section 312 is connected to the fixing section 311 and is in the positioning port H302. After being bent, the buckle section 312 protrudes outward from the OBD plug 30, and a buckling groove suitable for engaging with the positioning protrusion is formed in the buckle section 312.

[0068] The elastic pressure plate 31 is made of metal and can be bent multiple times through a bending process to form a shape that protrudes outward from the OBD plug 30. This shape of the latching section 312 can form a latching groove. When the OBD plug 30 is plugged into the vehicle's OBD interface, the positioning protrusion on the OBD interface can smoothly enter the positioning port H302 and mechanically engage with the latching section 312. The shape and size of the latching groove are adapted to the positioning protrusion. Thus, under the latching action of the positioning protrusion and the latching section 312, as well as the elastic pressing action of the elastic pressure plate 31, the reliability and stability of the connection between the OBD plug 30 and the OBD interface are ensured.

[0069] In this embodiment, the elastic pressure plate 31 adopts a structure of a fixed section 311 and a clamping section 312, and a bending process is used to make the clamping section 312 protrude outward from the OBD plug 30 to form a clamping groove suitable for engaging the positioning protrusion. This significantly enhances the mechanical fixation between the OBD plug 30 and the OBD interface, effectively preventing the connection from being interrupted due to vibration or external interference, and further ensuring the stability and high reliability of the vehicle diagnostic instrument in the process of data acquisition and fault diagnosis.

[0070] Preferably, the cross-section of the engaging groove in the insertion direction of the OBD plug 30 is trapezoidal or triangular. The trapezoidal or triangular engaging groove structure ensures a stable and reliable locking effect when the positioning protrusion enters the positioning port H302, while also allowing the OBD plug 30 to be smoothly inserted into or removed from the OBD interface, improving the convenience of the insertion and removal operation.

[0071] Reference Figures 3 to 5As shown, in one embodiment of this utility model, the OBD plug 30 includes a plug socket 301 and a connector 302. One end of the plug socket 301 is fixedly connected to the housing 10, and the other end of the plug socket 301 has a insertion cavity. The connector 302 is disposed in the insertion cavity. Exemplarily, the connector 302 is a 16-pin connector 302, adapted to the OBD interface. A positioning port H302 is disposed on the side wall of the insertion cavity, and the positioning port H302 has an open side, which is located on the end of the plug socket 301 away from the housing 10.

[0072] In this embodiment, the open design of the positioning port H302 allows the positioning protrusion of the OBD interface on the vehicle to smoothly enter during the insertion process and form a tight mechanical latching relationship with the elastic pressure plate 31. That is, it enables the OBD plug 30 to be quickly inserted into the OBD interface on the vehicle during use and form a stable and reliable connection, improving the convenience of use while ensuring the reliability and stability of the insertion.

[0073] Preferably, the end of the latching section 312 away from the fixing section 311 has a folded edge 313 that bends outward toward the OBD plug 30 to guide the insertion of the positioning protrusion. For example, the folded edge 313 is located on the open side of the positioning port H302 and curves upward. This folded edge 313 effectively reduces the impact of assembly errors, allowing the positioning protrusion to smoothly enter the positioning port H302 along the guide path within a relatively loose tolerance range.

[0074] Reference Figure 3 and Figure 5 As shown, in some embodiments of this utility model, the outer shell 10 includes an upper shell 101 and a lower shell 102, which are interlocked and fixed by threaded fasteners. That is, the upper shell 101 and the lower shell 102 can be first fastened together by a snap-fit ​​structure and then connected by fasteners such as screws. In this way, the connection between the upper shell 101 and the lower shell 102 can be ensured to be reliable and can remain stable and reliable in specific application scenarios.

[0075] The plug socket 301 has a slot H301 at one end away from the positioning port H302, and the slot H301 surrounds the outer surface of the plug socket 301 circumferentially. One end of the upper shell 101 has a downwardly protruding upper retaining edge, and one end of the lower shell 102 has an upwardly protruding lower retaining edge 1022. The upper retaining edge and the lower retaining edge 1022 engage in the slot H301 to fix the plug socket 301 to the outer shell 10.

[0076] During assembly, the circuit board 20 is inserted into the lower shell 102, and the plug socket 301 is placed at one end of the lower shell 102, ensuring that the slot H301 engages with the lower retaining edge 1022 on the lower shell 102. Then, the upper shell 101 is closed with the lower shell 102 and fixed with threaded fasteners. In this way, the upper retaining edge and the lower retaining edge 1022 engage with the slot H301 from the upper and lower sides, thereby firmly fixing the OBD plug 30 to one end of the outer shell 10.

[0077] In this embodiment, by setting an interlocking structure between the upper shell 101 and the lower shell 102, and utilizing the slot H301 on the plug socket 301 to engage with the upper retaining edge of the upper shell 101 and the lower retaining edge 1022 of the lower shell 102, precise engagement is achieved. The use of threaded fasteners further enhances the overall assembly's robustness, effectively preventing loosening caused by vibration and external impacts. This ensures stable and reliable operation of the vehicle diagnostic instrument during data acquisition and fault diagnosis. Furthermore, the assembly is simple and convenient, facilitating subsequent maintenance and repair.

[0078] Reference Figure 1 and Figure 2 As shown, in one embodiment of the present invention, a first lamp cap 1011 is provided in the first lamp hole H101, and a second lamp cap 1021 is provided in the second lamp hole H102. The first lamp cap 1011 and the second lamp cap 1021 are different colors.

[0079] The first light cap 1011 and the second light cap 1021 are different colors, which allows users to quickly identify the working status of the device by the difference in the color of the light cap when connecting, starting or when a fault occurs, and to distinguish different alarm or indication information, thereby improving the user's information acquisition efficiency and intuitive identification ability when the device is working.

[0080] Preferably, there are two first indicator lights 201 and two second indicator lights, with the two first indicator lights 201 spaced apart and the two second indicator lights spaced apart. By setting two spaced first indicator lights 201 and two second indicator lights on the front and back of the housing 10, the display effect of the status signal is enhanced, ensuring that users can accurately obtain the device's working status information under different installation and usage scenarios. At the same time, the redundancy design increases the reliability and fault tolerance of the device.

[0081] Reference Figures 3 to 5 As shown, in one embodiment of the present invention, the OBD plug 30 further includes an interface board 303, the connector 302 is connected to the interface board 303, the interface board 303 is located inside the housing 10, and the interface board 303 is provided with an adapter, the interface board 303 is connected to the circuit board 20 via the adapter.

[0082] In this embodiment, by setting up an interface board 303 and an adapter, and using the adapter to connect to the circuit board 20, the signal connection between the connector 302 of the OBD plug 30 and the circuit board 20 is realized. This connection method facilitates the configuration of the OBD plug 30, and the required type of OBD plug 30 can be configured as needed. At the same time, it also ensures that the installation of the OBD plug 30 is convenient and simple.

[0083] Reference Figure 3 As shown, in some embodiments of this utility model, the outer shell 10 is provided with grip grooves H103 on both sides for users to grip and operate. In this way, during the plugging and unplugging process, the user can hold the grip grooves H103 with their fingers to perform the plugging and unplugging operation, which improves the convenience of the plugging and unplugging operation.

[0084] 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.

[0085] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A vehicle diagnostic tool, characterized in that, include: The outer casing has a first lamp hole on its top surface and a second lamp hole on its bottom surface. The circuit board is disposed inside the housing. The upper surface of the circuit board is provided with a first indicator light located in the first lamp hole, and the lower surface of the circuit board is provided with a second indicator light located in the second lamp hole. The OBD plug is located at one end of the housing and is electrically connected to the circuit board. One side wall of the OBD plug has a positioning port that mates with a positioning protrusion on the vehicle's OBD interface. An elastic pressure plate is provided in the positioning port. When the OBD plug is inserted into the vehicle's OBD interface, the positioning protrusion enters the positioning port, and the elastic pressure plate holds the top of the positioning protrusion.

2. The vehicle diagnostic instrument according to claim 1, characterized in that, The elastic pressure plate includes a fixing section and a snap-fit ​​section. The fixing section is fixed to the OBD plug, and the snap-fit ​​section is connected to the fixing section and is located in the positioning hole. After being bent, the snap-fit ​​section protrudes outward from the OBD plug, and a snap-fit ​​groove suitable for engaging with the positioning protrusion is formed inside the snap-fit ​​section.

3. The vehicle diagnostic instrument according to claim 2, characterized in that, The cross-section of the engagement groove in the insertion direction of the OBD plug is trapezoidal or triangular.

4. The vehicle diagnostic instrument according to claim 1, characterized in that, The OBD plug includes a plug socket and a connector. One end of the plug socket is fixedly connected to the housing, and the other end of the plug socket has a insertion cavity. The connector is disposed in the insertion cavity. The positioning port is located on the side wall of the plug cavity, and the positioning port has an open side, which is located on the plug socket at the end away from the outer shell.

5. The vehicle diagnostic instrument according to claim 2, characterized in that, The end of the buckle section away from the fixing section has a folded edge that bends outward toward the OBD plug to guide the insertion of the positioning protrusion.

6. The vehicle diagnostic instrument according to claim 4, characterized in that, The outer shell includes an upper shell and a lower shell, which are interlocked and fixed by threaded fasteners. The plug socket has a slot at one end away from the positioning port, and the slot surrounds the outer surface of the plug socket circumferentially; one end of the upper shell has a downward protruding upper retaining edge, and one end of the lower shell has an upward protruding lower retaining edge, and the upper retaining edge and the lower retaining edge engage in the slot to fix the plug socket to the outer shell.

7. The vehicle diagnostic instrument according to claim 1, characterized in that, The first lamp hole is provided with a first lamp cap, and the second lamp hole is provided with a second lamp cap. The first lamp cap and the second lamp cap are different colors.

8. The vehicle diagnostic instrument according to claim 1, characterized in that, There are two first indicator lights and two second indicator lights, with the two first indicator lights spaced apart and the two second indicator lights spaced apart.

9. The vehicle diagnostic instrument according to claim 4, characterized in that, The OBD plug also includes an interface board, the connector is connected to the interface board, the interface board is located inside the housing, and the interface board is provided with an adapter, the interface board is connected to the circuit board for signal transmission through the adapter.

10. The vehicle diagnostic instrument according to claim 1, characterized in that, The outer casing has grip grooves on both sides for users to hold and operate.

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