On-vehicle diagnostic system plug

Abstract

The present invention relates to an on-board diagnostic system plug, comprising: a shell, on which a locking structure is provided; a pin bracket, located on the shell; a pin, mounted on the pin bracket; a linkage mechanism, located on the pin bracket, and having a first position and a second position with a reciprocating stroke relative to the pin bracket; the linkage mechanism including an actuator; when the linkage mechanism is in the first position, in a projection view perpendicular to the movement direction of the actuator, the projection of the locking structure and the projection of the actuator have an overlapping portion to prevent the pin bracket from detaching from the shell; when the linkage mechanism is in the second position, the actuator provides an escape channel for the pin bracket to detach from the shell or for the pin bracket to be mounted on the shell. The above-mentioned on-board diagnostic system plug has low manufacturing and assembly difficulty, is easy to replace, and can withstand large pulling forces.

Description

Technical Field

[0001] The invention relates to the technical field of automobile fault diagnosis, in particular to a vehicle-mounted diagnostic system plug. Background Art

[0002] With the increasing popularity and internationalization of automobiles, vehicles are now equipped with on-board diagnostics (OBD) systems to monitor vehicle emissions and drivability in real time. These systems monitor the operating conditions of the engine's electronic control system and other functional modules during operation, providing warnings if any abnormalities are detected. The OBD connector connects the vehicle's testing instruments to the vehicle's control system.

[0003] Currently, there are the following ways to connect the metal pins in the on-board diagnostic system plug and the plastic body on the market: (1) In-mold injection molding: The metal pins are placed in the mold in advance, and the metal pins and the plastic body are directly injection molded into an integrated structure through mold injection molding. (2) Cold pressing: The plastic body of the metal plug is injection molded, and then the metal pins are pressed into the socket of the plastic body at room temperature using a pressing fixture. The serrations on the metal pins and the plastic vias generate a bite force. In-mold injection molding requires the metal pins and the mold to be made very accurately, otherwise they cannot be demolded normally, which is costly and difficult. In cold pressing, because there are serrations on the metal pins, cold pressing them into the plastic vias will cause a certain degree of damage to the plastic body, and the bite force generated is limited. When the pull-out force is too large, the metal pins will be separated from the plastic body, and the plastic body will also be scrapped. The cold pressing process also requires very high dimensional accuracy of the pins and vias. Summary of the Invention

[0004] Based on this, it is necessary to provide an on-board diagnostic system plug to address the problem that the on-board diagnostic system plug is difficult to manufacture and has high cost.

[0005] A vehicle diagnostic system plug comprises: a shell, on which a locking structure is provided; a pin bracket, located on the shell; a pin, mounted on the pin bracket; a linkage mechanism, located on the pin bracket, and having a reciprocating stroke relative to the pin bracket and having a first position and a second position; the linkage mechanism comprises an actuator; when the linkage mechanism is in the first position, in a projection view perpendicular to the movement direction of the actuator, the projection of the locking structure and the projection of the actuator have an overlapping portion to prevent the pin bracket from detaching from the shell; when the linkage mechanism is in the second position, the actuator provides an avoidance channel for the pin bracket to detach from the shell or for the pin bracket to be installed on the shell.

[0006] In one embodiment, the shell is provided with a accommodating portion, and the edge position of the accommodating portion extends toward the accommodating area of the accommodating portion to form the locking structure; the pin bracket is located in the accommodating area of the accommodating portion; the pin bracket is provided with a travel groove, and the actuator is accommodated in the travel groove and can move relative to the pin bracket; when the linkage mechanism is in the first position, the actuator is located below the locking structure in a direction of movement perpendicular to the actuator.

[0007] In one embodiment, a boss and a groove that are engaged with each other are provided on the inner wall of the travel groove and on the executive part; a stop is also provided on the inner wall of the travel groove, and when the linkage mechanism is in the second position, the end of the executive part away from the locking structure abuts against the stop.

[0008] In one embodiment, a relief portion is provided on the pin bracket at a position corresponding to the locking structure.

[0009] In one embodiment, the linkage mechanism further includes a force-bearing part and a driving part, and the driving part is configured to transmit and connect the force-bearing part and the executing part, so as to convert the up and down stroke or circumferential stroke of the force-bearing part when subjected to external force into the left and right stroke of the executing part.

[0010] In one embodiment, the force-bearing part includes a rotating part, which is rotatably connected to the pin bracket; a track groove is provided on the side of the rotating part facing the pin bracket; the driving part includes a positioning part, one end of the positioning part is fixed on the executing part, and the other end is inserted into the track groove. When the rotating part is rotated, the other end of the positioning part moves in the track groove and drives the executing part to move left and right.

[0011] In one embodiment, the execution part includes a first slider and a second slider, and the first slider and the second slider are symmetrically accommodated in the travel groove; the driving part includes a first positioning element fixed on the first slider and a second positioning element fixed on the second slider; the force-bearing part includes a first connecting rod and a second connecting rod, one end of the first connecting rod is pivotally connected to one end of the second connecting rod; the other end of the first connecting rod is rotatably connected to the first positioning element, and the other end of the second connecting rod is rotatably connected to the second positioning element; the part where the first connecting rod and the second connecting rod are pivotally connected is located above the pin bracket; when the linkage mechanism is in the first position, the angle between the first connecting rod and the second connecting rod is 180 degrees.

[0012] In one embodiment, it further includes a first magnetic element and a second magnetic element, wherein the first magnetic element and the second magnetic element have opposite poles, the other pole of the first magnetic element is connected to the first slider, and the other pole of the second magnetic element is connected to the second slider.

[0013] In one embodiment, a boss and a card point are formed on the surface of the pin in a direction perpendicular to the length of the pin, and a step hole for accommodating the pin is provided on the pin bracket. A protrusion that cooperates with the card point is provided on the inner wall of the step hole, and the step portion of the step hole cooperates with the boss.

[0014] In one embodiment, a buckle is provided on a surface of the accommodating portion facing the accommodating area of the accommodating portion, and a clamping bone that cooperates with the buckle is provided on a surface of the pin bracket corresponding to the buckle.

[0015] The above-mentioned on-board diagnostic system plug is configured such that a pin bracket with pins is installed on a housing and the pin bracket is fixed to the housing through a linkage mechanism. This reduces the difficulty of product manufacturing and assembly, facilitates replacement, and can withstand greater pulling force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 1 is a schematic diagram of the overall structure of an on-board diagnostic system plug in an embodiment of the present invention.

[0017] Figure 2 FIG1 is a schematic top view of the on-board diagnostic system plug in a locked state according to an embodiment of the present invention.

[0018] Figure 3 for Figure 2 Schematic cross-section diagram.

[0019] Figure 4 FIG1 is a schematic top view of the on-board diagnostic system plug in an unlocked assembly state according to an embodiment of the present invention.

[0020] Figure 5 for Figure 4 Schematic cross-section diagram.

[0021] Figure 6 FIG. 1 is an exploded view of an on-board diagnostic system plug according to an embodiment of the present invention.

[0022] Figure 7 Schematic diagram of the structure of a pin bracket in an on-board diagnostic system plug in one embodiment of the present invention.

[0023] Figure 8 FIG2 is a schematic diagram of the assembly structure of the pins and the pin bracket in the on-board diagnostic system plug in one embodiment of the present invention.

[0024] Figure 9 for Figure 8 Schematic cross-section diagram.

[0025] Figure 10 FIG. 1 is a schematic structural diagram of a first slider in an on-board diagnostic system plug according to an embodiment of the present invention.

[0026] Figure 11 FIG. 1 is a schematic structural diagram of a rotating component in an on-board diagnostic system plug according to an embodiment of the present invention.

[0027] Figure 12 FIG1 is a bottom view of a rotating member in an on-board diagnostic system plug according to an embodiment of the present invention.

[0028] Figure 13 FIG. 4 is a structural diagram of a linkage mechanism in an on-board diagnostic system plug in another embodiment of the present invention.

[0029] Figure 14 FIG. 1 is a schematic top view of the linkage mechanism in an on-board diagnostic system plug in another embodiment of the present invention.

[0030] Figure 15 FIG1 is a schematic cross-sectional view of a linkage mechanism in an on-board diagnostic system plug in another embodiment of the present invention, taken in the main viewing direction.

[0031] Figure 16 FIG1 is a structural diagram of an on-board diagnostic system plug in another embodiment of the present invention in an unlocked assembly state.

[0032] Figure 17 for Figure 16 sectional view of .

[0033] Figure 18 FIG2 is a schematic diagram of a mechanism of an on-board diagnostic system plug in another embodiment of the present invention in a locked state.

[0034] Figure 19 for Figure 18 sectional view of . DETAILED DESCRIPTION

[0035] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to 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 invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] 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 defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0039] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be a central component. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0041] Example 1

[0042] In this embodiment, the OBD system plug is in an unlocked assembly state described below, which means that the pin holder 300 can be detached from the OBD system plug housing 100, but has not actually been detached. The OBD system plug is in a locked state, which means that the pin holder 300 cannot be detached from the OBD system plug housing 100.

[0043] See Figure 1 An embodiment of the present invention provides an on-board diagnostic system plug, comprising a housing 100, a pin 200, a pin holder 300, and a linkage mechanism 400. The pin 200 is detachably mounted on the pin holder 300; the linkage mechanism 400 is detachably mounted on the pin holder 300 and can have a reciprocating motion relative to the pin holder 300 and has a first position and a second position. The linkage mechanism 400 includes an actuator 430; the pin holder 300 is detachably mounted on the housing 100. A locking structure 110 is provided on the housing 100. Figure 3 As shown, when the linkage mechanism 400 is in the first position, in the projection view in the Z-axis direction, the projection of the locking structure 110 and the projection of the execution portion 430 have an overlapping portion to prevent the pin bracket 300 from being separated from the housing 100. Figure 5 As shown, when the linkage mechanism 400 is located at the second position, the execution portion 430 is away from the locking structure 110 , providing an escape channel for the pin holder 300 to be separated from the housing 100 or for the pin holder 300 to be installed on the housing 100 .

[0044] See Figure 6As shown, the housing 100 is provided with a housing portion 120, which includes a base plate 125 and a first side plate 121, a second side plate 122, a third side plate 123, and a fourth side plate 124, which are fixed to the base plate 125 and connected in sequence. The first side plate 121, the second side plate 122, the third side plate 123, the fourth side plate 124, and the base plate 125 form a housing groove 130 for accommodating the pin bracket 300. In this embodiment, the structure formed by the first side plate 121, the second side plate 122, the third side plate 123, and the fourth side plate 124 is projected in the Z-axis direction as a rectangle with rounded corners.

[0045] Continue reading Figure 6 As shown, the first side panel 121 is formed with a latch 126 protruding from its inner surface. This latch 126 is used to form a latch connection with the structure on the pin holder 300. Symmetrically, a latch 126 is also provided on the inner surface of the third side panel 123 (not shown). The number and location of these latches 126 are determined based on actual needs. It should be noted that the aforementioned inner surface refers to the area of the accommodating portion 120 that faces the receiving groove 130 and is used to mount the pin holder 300. The end of the second side panel 122 that is distal to the base panel 125 extends toward the receiving groove 130 to form a latch structure 110. This latch structure 110 is located in the middle of the second side panel 122. Similarly, the end of the fourth side panel 124 that is distal to the base panel 125 extends toward the receiving groove 130 to form a latch structure 110. This latch structure 110 is located in the middle of the fourth side panel 124. In the Z-axis direction, the projection of the latch structure 110 overlaps with the projection of the base panel 125. When the pin holder 300 is installed or removed from the housing 100, the locking structure 110 is located on the path of the pin holder 300 being installed or removed from the housing 100. A pinhole 128 is provided on the bottom plate 125 for partially inserting the pin 200 on the pin holder 300.

[0046] See 8 and Figure 9 As shown, the pin 200 includes a body 210, a shoulder 220 perpendicular to the body 210, and a clamping point 230 located on one side of the body 210 and protruding from the body surface. In the Z-axis projection direction, the projection of the clamping point 230 is within the projection range of the shoulder 220.

[0047] See Figure 7 As shown, Figure 7The figure is a schematic diagram of the structure of the pin bracket 300. The length direction of the pin bracket 300 can be regarded as the X-axis direction. The pin bracket 300 is an axisymmetric structure. The pin bracket 300 includes a first pin plate 310, a second pin plate 320 and a base plate 330. The first pin plate 310 and the second pin plate 320 have the same shape and size and are symmetrically arranged parallel to each other in the X-axis direction. The base plate 330 is clamped between the first pin plate 310 and the second pin plate 320 and is perpendicular to the first pin plate 310 and the second pin plate 320. A travel groove 340 is formed between the first pin plate 310, the second pin plate 320 and the base plate 330. The travel groove 340 is used to accommodate the linkage mechanism 400 and provide movement space for the actuator 430 in the linkage mechanism 400.

[0048] Continue reading Figure 7 As shown, the first pin plate 310 includes a first side surface 311 for enclosing the travel slot 340, a first end surface 312 and a first bottom surface 313 perpendicular to the first side surface 311, and a third outer side surface 314 parallel to the first side surface 311. The second pin plate 320 includes a second side surface 321 for enclosing the travel slot 340, a second end surface 322 and a second bottom surface 323 perpendicular to the second side surface 321, and a fourth outer side surface 324 parallel to the second side surface 321. In this embodiment, the first and second bottom surfaces 313 and 323 lie within the plane of the XY axis, and the end surface of the base plate 330 facing away from the travel slot 340 lies in the same plane as the first and second bottom surfaces 313 and 323. When the pin bracket 300 is accommodated in the accommodating portion 120 of the housing 100, the end surface of the base plate 330 facing away from the travel slot 340, the first and second bottom surfaces 313 and 323 mate with the inner surface of the bottom plate 125 of the housing 100.

[0049] See also Figure 7 and Figure 9 As shown, the first pin plate 310 is provided with a stepped hole 350 that passes through the first end surface 312 and the first bottom surface 313. The stepped hole 350 is used to mount the pin 200. The stepped hole 350 includes a semi-through hole portion 351 and a through hole portion 352 that are connected. A protrusion 353 extends from the inner wall of the through hole portion 352 toward the axis of the stepped hole 350. The semi-through hole portion 351 is used to mate with the boss 220 on the pin 200, and the protrusion 353 is used to form a snap connection with the locking point 230 on the pin 200. In the installation direction of the pin 200, the locking point 230 is located directly below the protrusion 353 to prevent the pin 200 from being separated from the pin bracket 300. The number and arrangement of the stepped holes 350 are configured according to the actual number of pins 200. Similarly, the second pin plate 320 is also symmetrically provided with stepped holes 350.

[0050] Continue reading Figure 7As shown, because the visual range of the first pin plate 310 is limited in the illustrated angle, the second pin plate 320 is used for description here. A recessed portion 360 is provided on the second pin plate 320, extending from the fourth outer side surface 324 toward the second side surface 321. A protruding latch 361 is provided on the surface of the recessed portion 360 parallel to the second side surface 321. When the OBD system plug is assembled, the latch 361 abuts against the latch 126 on the housing 100 in the Z-axis direction. The latch 126 prevents the pin holder 300 from easily detaching from the housing 100. In other embodiments, the recessed portion 360 may also be provided on the housing 100, with the latch 361 correspondingly provided within the recessed portion 360 of the housing 100, and a corresponding latch 126 provided on the fourth outer side surface 324 of the pin holder 300. Any solution is acceptable as long as it ensures a pre-installed connection between the pin holder 300 and the housing 100, preventing the pin holder 300 from detaching from the housing 100 without any external forces or its own weight. The number of recesses 360 can be adjusted based on actual needs. In this embodiment, there are three recesses 360 on the fourth outer side surface 324, spaced evenly along the X-axis. Similarly, the first pin plate 310 is also symmetrically provided with recesses 360, each with a retaining bar 361 positioned within it.

[0051] Continue reading Figure 7 As shown, on the first pin board 310, a corrugated block 315 is formed on the end of the first side surface 311 away from the substrate 330, protruding from the first side surface 311. It is understood that there is a distance between the corrugated block 315 and the substrate 330. At least two tooth-like structures 316 are provided on the surface of the corrugated block 315 facing the travel groove 340, which are used to engage with the structure on the linkage mechanism 400. The corrugated blocks 315 are provided in two and are symmetrically arranged at a set distance. A stop 317 is also formed on the first side surface 311, protruding from the first side surface 311, for limiting the movement stroke of the linkage mechanism 400. The stop 317 is located on the symmetry axis of the two corrugated blocks 315, and its height in the Z-axis direction extends from the plane where the first end surface 312 is located to the substrate 330. Similarly, the second pin board 320 is also symmetrically provided with corrugated blocks 315 and stop 317.

[0052] Continue reading Figure 7 At the center of the base plate 330, a connecting portion 331 is provided along the Z-axis direction, protruding from the surface of the base plate 330. A mounting hole 332 is provided at the center of the connecting portion 331 for cooperating with the structure in the linkage mechanism 400. The height of the connecting portion 331 in the Z-axis direction is configured according to actual needs. In this embodiment, the connecting portion 331 is a disc-shaped structure, and the two ends of the disc-shaped structure have intersections with the two stops 317. The size of the connecting portion 331 is preferably such that it does not interfere with the linkage mechanism 400 being installed in a suitable position. Also refer to Figure 5As shown, the end surface of the base plate 330 away from the travel groove 340 is recessed in the Z-axis direction to form an accommodating groove 333 , and the accommodating groove 333 is communicated with the mounting through hole 332 .

[0053] Continue reading Figure 7 As shown, along the length of the pin holder 300, a clearance portion 370 is provided between the end surface of the base plate 330, which is away from its own center, and the plane containing the end surface of the first pin board 310, which is away from its own center. That is, along the X-axis, there is a gap between the end surface of the base plate 330, which is away from the origin of the coordinate axis, and the plane containing the end surface of the first pin board 310, which is away from the origin of the coordinate axis. Because the pin holder 300 will be blocked by the locking structure 110 during installation in the housing 100, the clearance portion 370 serves to avoid the locking structure 110.

[0054] See Figure 1 As shown, the linkage mechanism 400 includes a force-bearing part 410, a driving part 420 and an executing part 430. The driving part 420 transmits and connects the force-bearing part 410 and the executing part 430 to convert the up and down stroke or circumferential stroke of the force-bearing part 410 when it is subjected to external force into the left and right stroke of the executing part 430.

[0055] See Figure 6 As shown, the execution unit 430 includes a first slider 431 and a second slider 531. The first slider 431 and the second slider 531 are two structures with the same shape and size. One of them is taken as an example. Figure 10As shown, the first slider 431 is a rectangular parallelepiped with six surfaces: a left surface 432, a right surface 433, an upper surface 434, a lower surface 435, a front surface 436, and a rear surface 437. A first notch 440 is provided at the corner where the left and upper surfaces 432 and 434 intersect. A second notch 441, symmetrical to the first notch 440, is provided at the corner where the upper and right surfaces 434 and 433 intersect. A third notch 442 is provided at the corner where the upper and right surfaces 434 and 437 intersect. The first, second, and third notches 440, 441, 442 have the same depth in the vertical direction, giving the first slider 431 a stepped structure. The left surface 432 is recessed to the right in the set position to form a first recessed groove 443. Symmetrically, the right surface 433 is recessed to the left to form a second recessed groove 444. A protruding first latching portion 445 is provided on the surface of the first recess 443 parallel to the left surface 432. The left side of the first latching portion 445 does not extend beyond the plane of the left surface 431 and is sized to engage with the toothed structure 316 on the corrugated block 315. Symmetrically, a second latching portion 446 is provided on the second recess 444. A fourth notch 447 is provided at the corner where the lower surface 435 and the front surface 436 intersect. The vertical depth of the fourth notch 447 matches the Z-axis height of the connecting portion 331. The dimensions of the fourth notch 447 do not interfere with the first notch 440, the second notch 441, the first recess 443, and the second recess 444.

[0056] When the OBD system plug is locked and assembled, the first slider 431 is accommodated in the travel groove 340. The first notch 440 and the second notch 441 are respectively used to accommodate the symmetrically arranged corrugated blocks 315. The locking structure 110 is at least partially accommodated in the third notch 442. The first locking portion 445 and the second locking portion 446 respectively engage with the toothed structures 316 on the symmetrically arranged corrugated blocks 315. Figure 5 As shown, when the OBD system plug is in the unlocked assembly state, the connecting portion 331 is partially accommodated in the fourth notch 447 .

[0057] See Figure 11 and Figure 12As shown, the force-bearing part 410 includes a rotating member 411, and the rotating member 411 includes an elliptical ring-shaped circumferential wall 412 and a cover plate 413. The cover plate 413 is fixed to the end of the circumferential wall 412. The top projection view of the rotating member 411 is elliptical, with a major axis and a minor axis. An elliptical protrusion 415 is provided at the center of the cover plate 413, and an elliptical ring-shaped track groove 416 is formed between the elliptical protrusion 415 and the circumferential wall 412. The track groove 416 is used to accommodate the driving part 420, and the groove width of the track groove 416 is adapted to the size of the driving part 420. A connecting rod 417 is formed at the center of the elliptical protrusion 415. The connecting rod 417 is used to cooperate with the mounting through hole 332 on the pin bracket 300 and can rotate relative to the mounting through hole 332. See Figure 6 and Figure 5 As shown, the force-bearing portion 410 further includes a nut 418 for connecting to the end of the connecting rod 417 away from the elliptical protrusion 415 after the connecting rod 417 passes through the mounting hole 332 to prevent the rotating member 411 from separating from the pin bracket 300. The nut 418 is accommodated in the receiving groove 333.

[0058] See Figure 6 As shown, the driving part 420 includes a first positioning member 421 and a second positioning member 521. One end of the first positioning member 421 is fixed to the end of the first slider 431 away from the third notch 442, and the other end is used to plug into the track groove 416; one end of the second positioning member 521 is fixed to the end of the second slider 531 away from the third notch 442, and the other end is used to plug into the track groove 416. In this embodiment, the positioning member 421 is a columnar structure. Figure 4 and Figure 5 As shown, the on-board diagnostic system plug is in the unlocked assembly state, and one end of the first positioning member 421 for plugging and mating with the track groove 416 is located on the straight line where the short axis of the rotating member 411 is located, and one end of the second positioning member 521 for plugging and mating with the track groove 416 is located on the straight line where the short axis of the rotating member 411 is located.

[0059] See Figure 6 As shown, the assembly process of the vehicle diagnostic system plug is as follows: install the pin 200 into the pin bracket 300, and then push the first slider 431 and the second slider 531 into the travel groove 340 from both ends of the pin bracket 300; Figure 6(not shown) align the first and second locating members 421 and 521 and install it onto the pin holder 300; align the relief portion 370 of the pin holder 300 with the latch structure 110, and install the assembled pin 200, pin holder 300, and linkage mechanism 400 as a whole onto the housing 100. To disassemble the OBD plug, simply follow the reverse steps. By assembling the pin 200, pin holder 300, and linkage mechanism 400 into the OBD plug, each component can be manufactured separately, simplifying the process and allowing for individual replacement.

[0060] See Figure 4 and Figure 5 As shown, Figure 4 This is a top view of the on-board diagnostic system plug in the unlocked assembly state. Figure 5 for Figure 4 Cross-sectional view. The first slider 431 and the second slider 531 are symmetrically accommodated within the travel groove 340 of the pin holder 300, which is located within the accommodation groove 130 of the housing 100. The first positioning member 421 and the second positioning member 521 both extend into the track groove 416 and are located at opposite ends of the line corresponding to the minor axis of the rotating member 411. In the Z-axis direction, the end of the first slider 431 away from the first positioning member 421 does not interfere with the locking structure 110, and the end of the second slider 531 away from the second positioning member 521 does not interfere with the locking structure 110.

[0061] When the rotating member 411 rotates, the rotating member 411 converts its own rotational motion into linear motion of the first slider 431 and the second slider 531 through the first positioning member 421 and the second positioning member 521, so that the OBD system plug is locked. Figure 2 and Figure 3 As shown, when the OBD system plug is in the locked state, the rotating member 411 is relative to Figure 4 In the illustrated state, the housing 400 is rotated 90 degrees. At this point, the first positioning member 421 and the second positioning member 521 are located on a straight line along the long axis of the rotating member 411. In the Z-axis direction, the end of the first slider 431 away from the first positioning member 421 interferes with the latch structure 110, and the end of the second slider 531 away from the second positioning member 521 interferes with the latch structure 110. That is, in the Z-axis direction, the projection of the first slider 431 overlaps with the projection of the first positioning member 421, and the projection of the second slider 531 overlaps with the projection of the second positioning member 521. This prevents the pin holder 300 from detaching from the housing 100, and allows the pin holder 300 to withstand a large pull-out force.

[0062] Example 2

[0063] Unlike the first embodiment, the linkage mechanism 300 in this embodiment is different from that in the first embodiment. The structure of the linkage mechanism 300 is described below using the form of the linkage mechanism 300 when the OBD system plug is in the unlocked assembly state as an example.

[0064] See Figure 13 As shown, the force-bearing portion 410 includes a first link 451 and a second link 452. The first link 451 and the second link 452 are both axisymmetric structures. Figure 13 and Figure 15 As shown, the first connecting member 451 includes a first rotating shaft 453 and a second rotating shaft 454, which are arranged in parallel, as well as a first rod 457 and a second rod 458, which connect the first rotating shaft 453 and the second rotating shaft 454, respectively. The first rod 457 and the second rod 458 are parallel to each other. The first rotating shaft 453 is discontinuous in the middle, including a left half-shaft 653 and a right half-shaft 753, so that it can be attached to the second connecting member 452 by changing the distance between the left half-shaft 653 and the right half-shaft 753. The second connecting member 452 is axially symmetrical, including a hollow shaft 461 and a third rotating shaft 462, which are arranged in parallel, as well as a third rod 463 and a fourth rod 464, which connect the hollow shaft 461 and the third rotating shaft 462, respectively. The third rod 463 and the fourth rod 464 are arranged in parallel. The left half-shaft 653 and the right half-shaft 753 are accommodated in the hollow area of the hollow shaft 461, forming a pivotal structure that allows relative rotation. The second rotating shaft 454 is rotatably connected to the driving portion 420 , and the third rotating shaft 462 is rotatably connected to the driving portion 420 .

[0065] See also Figure 13 、 Figure 14 and Figure 15 As shown, the driving portion 420 includes a first positioning element 470 having a through hole and a second positioning element 471 having a through hole. The first positioning element 470 is fixed to the end of the first slider 431 near the stop 317, and the second positioning element 471 is fixed to the end of the second slider 531 near the stop 317. The second rotating shaft 454 is accommodated in the through hole of the first positioning element 470 and is rotatable relative to the first positioning element 470. The third rotating shaft 462 is accommodated in the through hole of the second positioning element 471 and is rotatable relative to the second positioning element 471. In other embodiments, the second rotating shaft 454 and the third rotating shaft 462 may also have a structure with an interrupted middle portion, similar to the first rotating shaft 453, and may be detachable relative to the first positioning element 470 and the second positioning element 471, respectively.

[0066] See also Figure 13 and Figure 15As shown, in other embodiments, the linkage mechanism 400 further includes a first magnetic element 480 and a second magnetic element 481, and the first magnetic element 480 and the second magnetic element 481 have opposite magnetic poles. One end of the first magnetic element 480 is engaged with the end of the first slider 431 away from the third notch 442, and one end of the second magnetic element 481 is engaged with the end of the second slider 531 away from the third notch 442; the other end of the first magnetic element 480 is magnetically abutted with the other end of the second magnetic element 481. In the front view projection, please refer to Figure 15 As shown, there is a set angle between the projection of the first connecting rod 451 and the projection of the second connecting rod 452 that are connected to each other.

[0067] When a downward thrust is applied to the pivotal connection between the first rotating shaft 453 and the hollow shaft 461, the magnetic attraction between the first magnetic element 480 and the second magnetic element 481 is overcome, causing the first slider 431 and the second slider 531 to move in opposite directions. When the applied thrust causes the first connecting rod 451 and the second connecting rod 452 to be on the same horizontal plane, the plane containing the magnetic lines of force between the first magnetic element 480 and the second magnetic element 481 lies below the first and second connecting rods 451 and 452. Due to the magnetic attraction, the first and second connecting rods 451 and 452 generate an interaction force at the pivotal connection, creating a self-locking effect. When the OBD test plug needs to be unlocked, an upward pull is applied to the pivotal connection between the first rotating shaft 453 and the hollow shaft 461. Due to the magnetic attraction, the plug is quickly unlocked.

[0068] See Figure 16 and Figure 17 As shown, the OBD system plug is in the unlocked assembly state. The first magnetic element 480 and the second magnetic element 481 are in contact under the action of magnetic force. In the Z-axis direction, the end of the first slider 431 away from the first positioning element 470 does not interfere with the locking structure 110, and the end of the second slider 531 away from the second positioning element 471 does not interfere with the locking structure 110. When a thrust F acts on the force-bearing portion 410, the thrust F overcomes the magnetic attraction between the first magnetic element 480 and the second magnetic element 481, causing the first slider 431 and the second slider 531 to slide in opposite directions, thus locking the OBD system plug. Figure 18 and Figure 19 As shown, when the on-board diagnostic system plug is in a locked state, the first connecting rod 451 and the second connecting rod 452 are in the same plane, and in the Z-axis direction, the end of the first slider 431 away from the first positioning element 470 interferes with the locking structure 110, and the end of the second slider 531 away from the second positioning element 471 interferes with the locking structure 110; there is a predetermined distance between the two opposite poles of the first magnetic element 480 and the second magnetic element 481.

[0069] An on-board diagnostic system includes a data reading module, a data acquisition module, and an on-board diagnostic system plug as described in any of the above items. The data acquisition module is located on the vehicle body, and the on-board diagnostic system plug is connected to the data acquisition module and the data reading module respectively. The data reading module reads information from the data acquisition module through the on-board diagnostic system plug.

[0070] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A vehicle diagnostic system plug, characterized in that: include: a housing, wherein a locking structure is provided on the housing; A pin bracket, located on the housing; A pin, mounted on the pin bracket; A linkage mechanism is located on the pin bracket, the linkage mechanism is detachably mounted on the pin bracket, and has a reciprocating stroke relative to the pin bracket and has a first position and a second position; the linkage mechanism includes an actuator; When the linkage mechanism is in the first position, in a projection view perpendicular to the movement direction of the actuator, the projection of the locking structure overlaps with the projection of the actuator, thereby preventing the pin bracket from being separated from the housing; When the linkage mechanism is located at the second position, the execution portion provides an escape passage for the pin bracket to be detached from the housing or for the pin bracket to be installed on the housing.

2. The on-board diagnostic system plug according to claim 1, characterized in that: The housing is provided with a receiving portion, the edge of which extends toward the receiving area of the receiving portion to form the locking structure; the pin bracket is located within the receiving area of the receiving portion; the pin bracket is provided with a travel groove, the actuator is accommodated in the travel groove and can move relative to the pin bracket; When the linkage mechanism is located at the first position, the executing portion is located below the locking structure in a direction perpendicular to the movement direction of the executing portion.

3. The on-board diagnostic system plug according to claim 2, characterized in that: A boss and a groove that are engaged with each other are provided on the inner wall of the travel groove and on the executive part; a stop is also provided on the inner wall of the travel groove, and when the linkage mechanism is in the second position, the end of the executive part away from the locking structure abuts against the stop.

4. The on-board diagnostic system plug according to claim 2, characterized in that: A relief portion is provided on the pin bracket at a position corresponding to the locking structure.

5. The on-board diagnostic system plug according to claim 2, characterized in that: The linkage mechanism also includes a force-bearing part and a driving part, wherein the driving part is connected to the force-bearing part and the executing part in a transmission manner, so as to convert the up and down stroke or circumferential stroke of the force-bearing part when subjected to external force into the left and right stroke of the executing part.

6. The on-board diagnostic system plug according to claim 5, characterized in that: The force-bearing part includes a rotating part, which is rotatably connected to the pin bracket; a track groove is provided on the side of the rotating part facing the pin bracket; the driving part includes a positioning part, one end of which is fixed on the executing part, and the other end is inserted into the track groove. When the rotating part is rotated, the other end of the positioning part moves in the track groove and drives the executing part to move left and right.

7. The on-board diagnostic system plug according to claim 5, characterized in that: The execution part includes a first slider and a second slider, and the first slider and the second slider are symmetrically accommodated in the travel groove; The driving portion includes a first positioning element fixed on the first slider and a second positioning element fixed on the second slider; The force-bearing portion includes a first link member and a second link member, one end of the first link member is pivotally connected to one end of the second link member; the other end of the first link member is rotatably connected to the first positioning element, and the other end of the second link member is rotatably connected to the second positioning element; the pivotal connection portion between the first link member and the second link member is located above the pin bracket; When the linkage mechanism is located at the first position, the angle between the first link member and the second link member is 180 degrees.

8. The on-board diagnostic system plug according to claim 7, characterized in that: It also includes a first magnetic element and a second magnetic element, wherein the first magnetic element and the second magnetic element have opposite poles, the other pole of the first magnetic element is connected to the first slider, and the other pole of the second magnetic element is connected to the second slider.

9. The on-board diagnostic system plug according to claim 1, characterized in that: The surface of the pin is formed with a boss and a card point in a direction perpendicular to the length of the pin. The pin bracket is provided with a stepped hole for accommodating the pin. The inner wall of the stepped hole is provided with a raised portion that cooperates with the card point, and the stepped portion of the stepped hole cooperates with the boss.

10. The on-board diagnostic system plug according to claim 2, characterized in that: A buckle is provided on the surface of the accommodating portion facing the accommodating area of the accommodating portion, and a clamping bone that cooperates with the buckle is provided on the surface of the pin bracket corresponding to the buckle.

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