OBD vehicle-mounted equipment

Abstract

The utility model discloses OBD vehicle-mounted equipment, which comprises a casing and a connecting cable, the casing is provided with a bottom surface and a first side surface, one end of the casing is provided with a slot, the slot is provided with a first open side positioned on the bottom surface and a second open side positioned on the first side surface, and a first connector is arranged in the slot; one end of the connecting cable is provided with a data plug, and the other end of the connecting cable is provided with an OBD connector. Wherein the data plug comprises a body part and a second connector arranged on the body part, the body part is matched with the slot and can be inserted into the slot, and the second connector is suitable for being connected with the first connector in an inserted mode to form electrical conduction when the body part is inserted into the slot. According to the OBD vehicle-mounted equipment provided by the utility model, the slot with two open sides is arranged on the casing, and the data plug is designed into a structure capable of being completely embedded into the slot, so that the data plug is integrally and firmly accommodated in the casing, and the problems that a traditional exposed connection structure is easy to shake and loosen are effectively avoided; and the connection stability and reliability are obviously improved.

Description

Technical Field

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

[0002] On-Board Diagnostics (OBD) is an important component of modern automotive electronic control systems. Its main function is to monitor and diagnose the operating status of the vehicle's engine electronic control system and other functional modules in real time. When the system detects an anomaly or malfunction in the vehicle, it automatically records relevant fault information and outputs prompts, providing important information for vehicle maintenance and troubleshooting.

[0003] Some OBD devices on the market currently use a cable connection structure. These devices are equipped with a cable, one end of which has a standard OBD plug for connecting to the vehicle's OBD diagnostic interface. The other end of the cable uses one of two common connection methods: one is to directly fix the cable to the device body, forming a single unit; the other is to have a data plug at the cable end, which connects to the device's data interface via a plug-and-play method.

[0004] For devices using plug-in connections, the data interface is typically located on one end of the device body. When the data plug connects to the data interface, part of it inserts into the interface to establish an electrical connection, while the other part remains exposed on the outside of the device for easy plugging and unplugging by the user. However, this connection structure has significant reliability issues. In actual use, the connection between the data plug and the data interface is prone to loosening, affecting the stability and reliability of data transmission. This problem is particularly pronounced during vehicle operation. The vibrations and bumps generated by a moving vehicle further exacerbate the loosening between the plug and the interface, severely impacting the normal operation of the device. Utility Model Content

[0005] 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 vehicle-mounted device.

[0006] To achieve the above objectives, the OBD vehicle-mounted device according to an embodiment of the present invention includes:

[0007] A housing having a bottom surface and a first side surface, a slot being provided at one end of the housing, the slot having a first open side located on the bottom surface and a second open side located on the first side surface, and a first connector being provided inside the slot;

[0008] A connecting cable, one end of which has a data plug for connecting to the housing, and the other end of which has an OBD connector for connecting to the vehicle's OBD interface;

[0009] The data plug includes a body and a second connector disposed on the body. The body is adapted to the slot and can be inserted into the slot. The second connector is adapted to engage with the first connector and form an electrical connection when the body is inserted into the slot.

[0010] According to the OBD vehicle-mounted device provided in this embodiment, by providing a slot with double-sided openings on the housing and designing the data plug to be fully embedded in the slot, the data plug is securely housed inside the housing, effectively avoiding the shaking and loosening problems easily caused by traditional exposed connection structures, and significantly improving the stability and reliability of the connection. This solves the connection reliability problem caused by vibration during vehicle operation, ensuring that the OBD device can work stably and reliably in various usage environments. Furthermore, the slot, with a first open side on the bottom and a second open side on the first side, forms a convenient operating space, allowing users to easily plug and unplug the data plug.

[0011] In addition, the OBD vehicle-mounted device according to the above embodiments of this utility model may also have the following additional technical features:

[0012] According to one embodiment of the present invention, a first latch is provided on the housing or the first connector; a second latch is provided on the data plug;

[0013] When the main body is inserted into the slot, the second latch engages with the first latch to prevent the data plug from being pulled out of the slot.

[0014] According to one embodiment of the present invention, when the second buckle is engaged with the first buckle, the second buckle is located below the first buckle and does not protrude from the bottom surface.

[0015] According to one embodiment of the present invention, the second buckle is configured to be pressed by a user to move downward and disengage from the first buckle.

[0016] According to one embodiment of the present invention, the bottom surface is provided with a clearance groove communicating with the first open side, and the first buckle is located in the clearance groove; when the main body is inserted into the slot, the second buckle enters the clearance groove and engages with the first buckle.

[0017] According to one embodiment of the present invention, the second buckle includes an elastic part and a second buckle part, wherein the elastic part is located below the second connector and can be deformed by the user pressing it.

[0018] The second latching part is provided on the elastic part and extends along the insertion direction of the data plug. The end of the second latching part away from the main body has an upwardly protruding second hook. When the elastic part is pressed by the user, the second hook moves downward.

[0019] According to one embodiment of the present invention, the first connector includes a terminal female and pins disposed in the terminal female, wherein the opening of the terminal female faces the first side.

[0020] The first buckle includes a first hook portion protruding downward from the bottom wall of the terminal female seat, and the first hook portion is provided with a guide slope for guiding the second hook portion to be inserted and fastened.

[0021] According to one embodiment of the present invention, the second connector includes a male terminal block, the male terminal block having pin holes for receiving the pin insertion;

[0022] The male terminal is provided with guide strips on both sides, and the female terminal is provided with guide grooves on both sides that cooperate with the guide strips.

[0023] According to one embodiment of the present invention, the two sides of the main body are provided with protrusions, and the two inner walls of the slot are provided with anti-disengagement grooves. When the main body is inserted into the slot, the protrusions are engaged in the anti-disengagement grooves.

[0024] According to one embodiment of the present invention, the anti-detachment groove extends in a direction perpendicular to the bottom surface, and the cross-section of the anti-detachment groove parallel to the bottom surface is arc-shaped.

[0025] 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

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the structure of the OBD vehicle-mounted device according to an embodiment of this utility model;

[0028] Figure 2 This is a structural schematic diagram of the OBD vehicle-mounted device (data plug and housing) according to an embodiment of this utility model;

[0029] Figure 3 This is a cross-sectional view of the OBD vehicle-mounted device according to an embodiment of this utility model;

[0030] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0031] Figure 5 This is a structural schematic diagram of the data plug in the OBD vehicle-mounted device according to an embodiment of the present invention, taken from one perspective.

[0032] Figure 6 This is a structural schematic diagram of the data plug in the OBD vehicle-mounted device according to another embodiment of the present invention.

[0033] Figure label:

[0034] 10. Data plug;

[0035] 101. Body part;

[0036] 1011. Protrusion;

[0037] 102. Second connector;

[0038] 103. Second buckle;

[0039] 1031. Elastic part;

[0040] 1032. Second buckle part;

[0041] 1033, Second hook;

[0042] 104. Guide strip;

[0043] H101, pin hole;

[0044] 20. Housing;

[0045] S201, bottom surface;

[0046] S202, First side view;

[0047] H201, slot;

[0048] H202, air-proof groove;

[0049] H2O3, anti-detachment from the groove;

[0050] 21. First connector;

[0051] 211. Terminal female socket;

[0052] 212. Stitches;

[0053] 213. First buckle;

[0054] H211, guide groove.

[0055] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. Detailed Implementation

[0056] 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.

[0057] 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.

[0058] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0059] 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.

[0060] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0061] The OBD vehicle-mounted device of this utility model embodiment is described in detail below with reference to the accompanying drawings.

[0062] Reference Figures 1 to 6 As shown, the OBD vehicle-mounted device provided according to the embodiment of the present utility model includes a housing 20 and a connecting cable.

[0063] Specifically, the housing 20 has a bottom surface S201 and a first side surface S202. One end of the housing 20 is provided with a slot H201. The slot H201 has a first open side located on the bottom surface S201 and a second open side located on the first side surface S202. A first connector 21 is provided inside the slot H201. That is, the slot H201 forms a double-sided open structure, and the first open side and the second open side are respectively located on the bottom surface S201 and the first side surface S202 of the housing 20. The bottom surface S201 and the first side surface S202 intersect, and correspondingly, the first open side and the second open side are connected to form an L-shaped opening.

[0064] One end of the connecting cable has a data plug 10 for connecting to the housing 20, and the other end has an OBD connector for connecting to the vehicle's OBD interface. The data plug 10 can be plugged into the housing 20, thus achieving a detachable connection between the connecting cable and the housing 20. This detachable connection facilitates cable replacement; for example, if the cable is damaged, it can be replaced. The OBD connector is a standard connector that can be plugged into the vehicle's OBD interface. When the OBD connector is connected to the vehicle's OBD interface, the OBD on-board device can acquire various vehicle data and perform diagnostics on this data.

[0065] The data plug 10 includes a body portion 101 and a second connector 102 disposed on the body portion 101. The body portion 101 is adapted to the slot H201 and can be inserted into the slot H201. The second connector 102 is adapted to engage with the first connector 21 and form an electrical connection when the body portion 101 is inserted into the slot H201.

[0066] In other words, the size and shape of the main body 101 match the slot H201 on the housing 20, ensuring that it can be fully embedded inside the slot H201 after insertion. The second connector 102 matches the first connector 21. When the main body 101 is inserted into the slot H201, the second connector 102 can accurately mate with the first connector 21 inside the slot H201, forming a stable and reliable electrical connection. This design allows the data plug 10 to form a complete integral structure with the housing 20 in the inserted state, effectively avoiding shaking and loosening at the connection point. Even when facing vibrations and bumps during vehicle operation, it can maintain a stable connection, ensuring the reliability of data transmission.

[0067] According to the OBD vehicle-mounted device provided in this embodiment of the utility model, by providing a slot H201 with double-sided openings on the housing 20 and designing the data plug 10 to be fully embedded in the slot H201, the data plug 10 is securely housed inside the housing 20, effectively avoiding the shaking and loosening problems easily caused by traditional exposed connection structures, and significantly improving the stability and reliability of the connection. This solves the connection reliability problem caused by vibration during vehicle operation, ensuring that the OBD device can work stably and reliably in various usage environments. Furthermore, the slot H201, by providing a first open side on the bottom surface S201 and a second open side on the first side surface S202 respectively, forms a convenient operating space, allowing users to easily plug and unplug the data plug 10.

[0068] Reference Figures 2 to 6 As shown, in some embodiments of this utility model, the housing 20 or the first connector 21 is provided with a first buckle 213; the data plug 10 is provided with a second buckle 103.

[0069] When the main body 101 is inserted into the slot H201, the second latch 103 engages with the first latch 213 to prevent the data plug 10 from being pulled out of the slot H201.

[0070] In this embodiment, a paired locking structure is formed by providing a first latch 213 on the housing 20 or the first connector 21, and a corresponding second latch 103 on the data plug 10. When the body 101 of the data plug 10 is inserted into the slot H201 of the housing 20, the second latch 103 gradually moves closer to the position of the first latch 213 as the insertion action occurs. When the body 101 is fully inserted, the second latch 103 automatically engages with the first latch 213, forming a latch lock. This latch lock effectively prevents the data plug 10 from accidentally falling off or being pulled out during use, providing dual protection for the stability of the connection. On the one hand, the tight fit between the slot H201 and the body 101 provides a basic fixing effect; on the other hand, the latch structure provides locking protection, thus making the connection more secure and reliable. In addition, the latch structure provides clear feedback on the engagement, allowing the user to judge whether the connection is correct through the tactile and auditory feedback during engagement, making it convenient to use.

[0071] Preferably, when the second latch 103 engages with the first latch 213, the second latch 103 is located below the first latch 213 and does not protrude from the bottom surface S201. By placing the second latch 103 below the first latch 213, the second latch 103 is more easily deformed downwards during insertion, thereby ensuring that the second latch 103 can more easily engage with the first latch 213. The design of the second latch 103 not protruding from the bottom surface S201 ensures the flatness of the entire outer surface of the device and also reduces the risk of the latch being accidentally unlocked.

[0072] Reference Figures 2 to 4 and Figure 6 As shown, in some embodiments of the present invention, the second latch 103 is configured to be pressed by a user to move downward and disengage from the first latch 213.

[0073] In this embodiment, by designing the second latch 103 as a pressable structure, a simple and intuitive unlocking operation is achieved. For example, the second latch 103 has a certain elastic deformation capability. When the user applies pressure to it, the second latch 103 will displace downwards, thereby separating from the first latch 213 and releasing the connection. This press-operated unlocking method is intuitive and simple; the user only needs to apply pressure to complete the unlocking, without complicated operation steps. Furthermore, since the unlocking action requires active pressure, the possibility of accidental unlocking is greatly reduced.

[0074] Reference Figure 2As shown, in one embodiment of this utility model, the bottom surface S201 is provided with a clearance groove H202 communicating with the first open side, and the first buckle 213 is located in the clearance groove H202. When the main body 101 is inserted into the slot H201, the second buckle 103 enters the clearance groove H202 and engages with the first buckle 213.

[0075] In this embodiment, a clearance groove H202 communicating with the first open side is provided on the bottom surface S201 of the housing 20. This clearance groove H202 serves as a space to avoid the second latch 103, providing sufficient space for the movement and locking of the second latch 103. When the second latch 103 is inserted into the clearance groove H202, it will contact the first latch 213. At this time, the second latch 103 can move downward and deform, and its movement and locking process are not disturbed, improving the reliability of the locking mechanism. In addition, since the first latch 213 and the second latch 103 are housed in the clearance groove H202, they are protected from external damage and the flatness of the outer surface of the equipment is maintained.

[0076] Reference Figure 2 and Figure 6 As shown, in one embodiment of the present invention, the second buckle 103 includes an elastic part 1031 and a second buckle part 1032. The elastic part 1031 is located below the first connector 21 and can be deformed by the user pressing it.

[0077] The second latching part 1032 is provided on the elastic part 1031 and extends along the insertion direction of the data plug 10. The second latching part 1032 has an upwardly protruding second hook part 1033 at one end away from the body part 101. When the elastic part 1031 is pressed by the user, the second hook part 1033 moves downward.

[0078] exist Figure 2 and Figure 6 In the example, the elastic part 1031 is a U-shaped structure. One side wall of the U-shaped structure is fixed to the second connector 102, and the second snap-fit ​​part 1032 is provided on the other side wall of the U-shaped structure. Thus, when the other side wall of the U-shaped structure is pressed, it is easy to deform, causing the second snap-fit ​​part 1032 to move downward.

[0079] In this embodiment, the second latch 103 with the above-described structure utilizes the elastic deformation capability of the elastic part 1031, allowing unlocking to be achieved simply by pressing the elastic part 1031. This makes the operation simple and the structure reliable. Furthermore, when the second latch 1032 is inserted into the slot H201 along with the data plug 10, the second latch 1032 enters the clearance groove H202, and the second hook 1033 on the second latch 1032 can engage with the first latch 213, forming a reliable latch connection. This ensures both operational convenience and locking reliability, providing a better user experience in practical applications.

[0080] Reference Figure 2 As shown, in one embodiment of the present invention, the first connector 21 includes a terminal female 211 and pins 212 disposed in the terminal female 211, and the opening of the terminal female 211 faces the first side surface S202.

[0081] The first latch 213 includes a first hook portion protruding downward from the bottom wall of the terminal female seat 211, and the first hook portion is provided with a guide slope for guiding the second hook portion 1033 to be inserted and fastened.

[0082] In this embodiment, the first connector 21 adopts a standard electrical connection form with a terminal female 211 and pins 212. The terminal female 211 serves as a load-bearing structure, and internally houses the pins 212 for electrical connection. The opening of the terminal female 211 faces the first side S202 of the housing 20, and this opening direction is consistent with the L-shaped open opening of the slot H201, ensuring accurate alignment of the data plug 10 during insertion, thereby achieving a reliable electrical connection.

[0083] A downwardly protruding first hook is provided on the bottom wall of the terminal female 211. This first hook can form a secure snap-fit ​​with the second hook 1033 on the data plug 10. Furthermore, the surface of the first hook is provided with a guide slope. This guides the second hook 1033 to smoothly insert and reliably engage. When the data plug 10 is inserted, the second hook 1033 first contacts the guide slope. Guided by the guide slope, the second hook 1033 undergoes a downward displacement. As the insertion continues, the second hook 1033 slides along the guide slope, ultimately forming an accurate engagement with the first hook. This makes the insertion process smoother and ensures that the second snap-fit ​​103 and the first snap-fit ​​213 can reliably and smoothly achieve the insertion operation.

[0084] Reference Figure 5 and Figure 6As shown, in one embodiment of the present invention, the second connector 102 includes a terminal male socket, the terminal male socket being provided with a pin hole H101 for receiving the pin 212 inserted.

[0085] The male terminal is provided with guide strips 104 on both sides, and the female terminal 211 is provided with guide grooves H211 on both sides that cooperate with the guide strips 104.

[0086] In this embodiment, the second connector 102 adopts a terminal male socket structure with pin holes H101. The size and position of these pin holes H101 correspond to the pins 212 in the first connector 21, and are used to receive the insertion of the pins 212, thereby forming a reliable electrical connection. To further improve the accuracy and reliability of the insertion, guide strips 104 are provided on both sides of the terminal male socket, while matching guide grooves H211 are provided on both side walls of the terminal female socket 211. The cooperation between the guide strips 104 and the guide grooves H211 plays a guiding role, guiding the terminal male socket to accurately align with the terminal female socket 211 during the insertion process, ensuring that the pins 212 can be accurately inserted into the corresponding pin holes H101, thus improving the accuracy and reliability of the insertion. In addition, the cooperation between the guide strips 104 and the guide grooves H211 also plays a positioning and supporting role, enhancing the mechanical strength of the connection, improving the stability of the overall structure in a vibration environment, and enabling the product to exhibit better reliability and durability in actual use.

[0087] Reference Figure 2 , Figures 5 to 6 As shown, in one embodiment of the present invention, the two sides of the main body 101 are provided with protrusions 1011, and the two inner walls of the slot H201 are provided with anti-disengagement grooves H203. When the main body 101 is inserted into the slot H201, the protrusions 1011 are engaged in the anti-disengagement grooves H203.

[0088] In this embodiment, an anti-disengagement positioning structure is formed by the engagement of the protrusion 1011 and the anti-disengagement groove H203. After the main body 101 is fully inserted into the slot H201, the protrusions 1011 on both sides of the main body 101 engage with the anti-disengagement grooves H203 on the two inner walls of the slot H201, thereby increasing the resistance of the main body 101 in the insertion and removal direction. In addition to the locking of the first latch 213 and the second latch 103, the engagement of the main body 101 with the slot H201, and the insertion of the first connector 21 and the second connector 102, an additional mechanical constraint is added, forming a multiple fixing mechanism. This not only improves the stability of the connection but also effectively prevents the main body 101 from shaking during use, thus better maintaining the stability of the connection.

[0089] Preferably, the anti-detachment groove H203 extends in a direction perpendicular to the bottom surface S201, and the cross section of the anti-detachment groove H203 parallel to the bottom surface S201 is arc-shaped. This arc-shaped design ensures that the body part 101 can be inserted into or removed from the slot H201 more smoothly. At the same time, it also ensures a reliable anti-detachment positioning cooperation between the protrusion 1011 and the anti-detachment groove H203.

[0090] 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.

[0091] 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 vehicle-mounted device, characterized in that, include: A housing having a bottom surface and a first side surface, a slot being provided at one end of the housing, the slot having a first open side located on the bottom surface and a second open side located on the first side surface, and a first connector being provided inside the slot; A connecting cable, one end of which has a data plug for connecting to the housing, and the other end of which has an OBD connector for connecting to the vehicle's OBD interface; The data plug includes a body and a second connector disposed on the body. The body is adapted to the slot and can be inserted into the slot. The second connector is adapted to engage with the first connector and form an electrical connection when the body is inserted into the slot.

2. The OBD vehicle-mounted device according to claim 1, characterized in that, The housing or the first connector is provided with a first latch; the data plug is provided with a second latch; When the main body is inserted into the slot, the second latch engages with the first latch to prevent the data plug from being pulled out of the slot.

3. The OBD vehicle-mounted device according to claim 2, characterized in that, When the second buckle is engaged with the first buckle, the second buckle is located below the first buckle and does not protrude from the bottom surface.

4. The OBD vehicle-mounted device according to claim 3, characterized in that, The second latch is configured to be pressed by the user to move downwards and disengage from the first latch.

5. The OBD vehicle-mounted device according to claim 2, characterized in that, The bottom surface is provided with a clearance groove that communicates with the first open side, and the first buckle is located in the clearance groove; when the main body is inserted into the slot, the second buckle enters the clearance groove and engages with the first buckle.

6. The OBD vehicle-mounted device according to claim 4, characterized in that, The second buckle includes an elastic part and a second buckle part. The elastic part is located below the second connector and can be deformed by the user pressing it. The second latching part is provided on the elastic part and extends along the insertion direction of the data plug. The end of the second latching part away from the main body has an upwardly protruding second hook. When the elastic part is pressed by the user, the second hook moves downward.

7. The OBD vehicle-mounted device according to claim 6, characterized in that, The first connector includes a terminal female and pins disposed in the terminal female, the opening of the terminal female facing the first side; The first buckle includes a first hook portion protruding downward from the bottom wall of the terminal female seat, and the first hook portion is provided with a guide slope for guiding the second hook portion to be inserted and fastened.

8. The OBD vehicle-mounted device according to claim 7, characterized in that, The second connector includes a male terminal block with pin holes for receiving the pin insertion. The male terminal is provided with guide strips on both sides, and the female terminal is provided with guide grooves on both sides that cooperate with the guide strips.

9. The OBD vehicle-mounted device according to claim 1, characterized in that, The main body has protrusions on both sides, and the slot has anti-dislodgement grooves on both inner walls. When the main body is inserted into the slot, the protrusions are engaged in the anti-dislodgement grooves.

10. The OBD vehicle-mounted device according to claim 9, characterized in that, The anti-detachment groove extends in a direction perpendicular to the bottom surface, and the cross-section of the anti-detachment groove parallel to the bottom surface is arc-shaped.

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