Adjustable multi-resistance resistance box for OBD mass production evaluation test

Abstract

The utility model provides an adjustable multi-resistance resistor box for OBD mass production evaluation test, which is characterized in that a plug terminal externally connected with the outside is arranged on a resistor box body, a circuit board is arranged in the resistor box body, a resistor panel is arranged on a resistor box cover body, and a plurality of two-gear three-pin toggle switches and resistor elements with the same number are arranged on the circuit board. A resistor element is connected between every two adjacent two-gear three-pin toggle switches, and the two-gear three-pin toggle switches can connect the corresponding resistor elements in series into a circuit or disconnect the corresponding resistor elements from the circuit. The resistor panel is provided with rectangular openings which are in one-to-one correspondence with the two-gear three-pin toggle switches and are used for exposing deflector rods of the corresponding two-gear three-pin toggle switches so as to facilitate up-down toggle operation, and a state identifier and a resistance identifier are connected to the right of one side of each rectangular opening; the resistor box can provide a plurality of different resistance values, is simple to operate, can greatly improve the test efficiency, ensures the test reliability, and can reduce the management of a plurality of single resistors.

Description

Technical Field

[0001] The utility model belongs to the field of automobile electronic component testing equipment, and relates to an adjustable multi-resistance resistor box used for OBD mass production evaluation test. Background Art

[0002] According to the requirements of Appendix JA.7 of GB 18352.6-2016 "Light-duty Vehicle Pollutant Emission Limits and Measurement Methods (China Phase VI)" (hereinafter referred to as the National VI Regulation), vehicle manufacturers should carry out OBD system mass production vehicle evaluation tests (i.e. PVE tests) to ensure that the vehicles, systems, components and independent technical assemblies mass-produced by each OEM are consistent with the models that have been type-inspected, and comprehensively evaluate the vehicle's OBD system from the perspectives of OBD standardization, OBD monitoring range, and OBD monitoring performance. The test is divided into three parts: standardization verification (J1), monitoring requirements verification (J2), and verification and reporting of in-use monitoring performance (J3).

[0003] The resistor box used for the mass production vehicle evaluation test of the OBD system is mainly used in the verification of the J2 monitoring requirements of the mass production vehicle evaluation test of the automobile OBD system. The multi-resistance resistor box is connected in series / parallel to the test device. By changing the resistance value of the resistor box in the series / parallel circuit, the simulation and verification of unreasonable signals, over-limit and other faults are realized, thereby avoiding the use of multiple single resistors in series / parallel in multiple test circuits to realize the verification of different trigger conditions of the OBD system monitoring function.

[0004] In the prior art, Chinese patent CN211236027U provides a "rotating resistor box" whose structure is as follows Figure 1 As shown, it mainly includes a box body, a box cover, a plug port, screws, a switch hole, an indication area, a turntable, a rotating handle, etc. It mainly changes the resistance value of the resistor by rotating the handle and connects it to the test circuit to realize two functions, namely, insulation resistance measurement of the high-voltage system of new energy vehicles and insulation alarm function verification. The rotary resistor box is a device for testing the high-voltage system of a car. It is mainly used for insulation resistance measurement of the high-voltage system of new energy vehicles. The application scenario is limited to the testing of the high-voltage system, and its promotion is not strong. The rotary resistor box can only adjust the resistance value of the resistor to 50KΩ, 100KΩ, 200KΩ, 500KΩ and 10MΩ, respectively, and cannot cover application scenarios with multiple resistance values. Utility Model Content

[0005] In order to overcome the problems existing in the prior art, the utility model provides an adjustable multi-resistance resistor box for OBD mass production evaluation test.

[0006] The utility model is realized by adopting the following technical solutions:

[0007] An adjustable multi-resistance resistor box for OBD mass production evaluation test, comprising a resistor box, a circuit board arranged in the resistor box, a resistor element and a resistor switch constituting a circuit arranged on the circuit board, and a plug-in terminal arranged on the resistor box;

[0008] The resistor box comprises a resistor box body with a plastic box structure having an open front, a circuit board fixed in the resistor box body, a resistor box cover body made of plastic covering the front opening of the resistor box body, an opening matching the circuit board is formed on the resistor box cover body, a resistor panel made of plastic matching the opening on the resistor box cover body is fixed in the opening of the resistor box cover body by bonding, and the plug-in terminal comprises an input end and an output end fixedly arranged on a side surface of the resistor box body;

[0009] The resistance switch is a plurality of two-speed three-pin toggle switches connected in sequence, wherein in each of two adjacent two-speed three-pin toggle switches, the normally closed end of the first two-speed three-pin toggle switch is connected to the common end of the second two-speed three-pin toggle switch, the common end of the first two-speed three-pin toggle switch is connected to the input end of the plug-in terminal, and the normally closed end of the last two-speed three-pin toggle switch is connected to the output end of the plug-in terminal;

[0010] The resistance components are metal film resistor elements of the same number as the two-speed three-pin toggle switches, and the resistance values ​​of all the metal film resistor elements are different. A metal film resistor element is connected between each two adjacent two-speed three-pin toggle switches. One end of the metal film resistor element between two adjacent two-speed three-pin toggle switches is connected to the normally open end of the previous adjacent two-speed three-pin toggle switch, the other end of the metal film resistor element between two adjacent two-speed three-pin toggle switches is connected to the common end of the next adjacent two-speed three-pin toggle switch, one end of the last metal film resistor element is connected to the normally open ends of the last two two-speed three-pin toggle switches, and the other end of the last metal film resistor element is connected to the output end of the plug-in terminal.

[0011] When the lever of the two-position three-pin toggle switch adjacent to the previous metal film resistor element is toggled until the common end of the two-position three-pin toggle switch is connected to the normally open end, the metal film resistor element is connected to the circuit; when the lever of the two-position three-pin toggle switch adjacent to the previous metal film resistor element is toggled until the common end of the two-position three-pin toggle switch is connected to the normally closed end, the metal film resistor element is disconnected from the circuit;

[0012] The resistor panel is provided with a rectangular opening corresponding to the two-speed three-pin toggle switch one by one, which is used to expose the corresponding two-speed three-pin toggle switch's lever to facilitate the up and down toggle operation. A dot-shaped access status mark is engraved on the resistor panel at the upper right corner of the rectangular opening, which is used to indicate that the corresponding two-speed three-pin toggle switch's lever is moved to the upper gear position, thereby connecting the common end and the normally open end of the two-speed three-pin toggle switch. A resistance value mark is engraved on the resistor panel at the lower right corner of the rectangular opening, which is below the access status mark and is used to indicate the resistance value of the metal film resistor element that can be connected when the lever of the corresponding two-speed three-pin toggle switch is moved to the upper gear position.

[0013] Further technical solutions include:

[0014] The resistor box cover body is fixedly connected to the resistor box body through a plurality of fixing holes and bolts.

[0015] The circuit board is fixedly connected to the resistor box body through a plurality of circuit board fixing screws.

[0016] The plug-in terminals are two banana plug sockets of different colors, the red banana plug socket is the input terminal and the black banana plug socket is the output terminal.

[0017] There are a total of twenty-eight two-position three-leg toggle switches connected in a serpentine arrangement in seven evenly spaced columns from left to right, with four evenly spaced in a column. That is, the two-position three-leg toggle switch at the bottom in each column and the two-position three-leg toggle switch at the top in the next adjacent column are adjacent to each other.

[0018] There are a total of twenty-eight metal film resistor elements with resistance values ​​of 1Ω, 2Ω, 3Ω, 4Ω, 10Ω, 20Ω, 30Ω, 40Ω, 100Ω, 200Ω, 300Ω, 400Ω, 1KΩ, 2KΩ, 3KΩ, 4KΩ, 10KΩ, 20KΩ, 30KΩ, 40KΩ, 100KΩ, 200KΩ, 300KΩ, 400KΩ, 1MΩ, 2MΩ, 3MΩ and 4MΩ, which are sequentially connected between the corresponding two adjacent two-speed three-leg toggle switches.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model provides an adjustable multi-resistance resistor box for OBD mass production evaluation test. The device and application method are mainly used in the verification of the J2 monitoring requirements of the mass production vehicle evaluation test of the automobile OBD system. The multi-resistance resistor box is connected in series / parallel to the test device. By changing the resistance value of the resistor box connected in series / parallel in the circuit, the fault simulation and verification of unreasonable signals, over-limit, etc. are realized, thereby avoiding the application of multiple single resistors in series / parallel in multiple test circuits to realize the verification of different trigger conditions of the OBD system monitoring function. The operation is simple, and the test efficiency is greatly improved. It not only ensures the reliability of the test, but also can reduce the management of multiple and various single resistors. At the same time, the application of the resistor box and the application method realizes the independent development of mass production vehicle evaluation test work, greatly reducing the test test cost; the application in the field of automobile maintenance greatly improves the efficiency of fault detection and diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] Figure 1 The present invention is a schematic diagram of the external structure of a rotary resistor box provided by the prior art.

[0023] Figure 2 The utility model provides an external structure diagram of an adjustable multi-resistance resistor box for OBD mass production evaluation test.

[0024] Figure 3 The utility model provides a schematic structural diagram of a circuit board and a resistor box cover body in an adjustable multi-resistance resistor box for OBD mass production evaluation test after being fixed to the resistor box body.

[0025] Figure 4 The utility model provides a schematic structural diagram of a resistor panel and a resistor box cover body in an adjustable multi-resistance resistor box for OBD mass production evaluation test after being fixed.

[0026] Figure 5 A circuit diagram of a two-stage three-pin toggle switch and corresponding metal film resistor elements in an adjustable multi-resistance resistor box for OBD mass production evaluation test provided in Example 1.

[0027] In the figure: 1. Resistor box body, 2. Resistor box cover body, 3. Resistor switch, 4. Resistor panel, 5. Plug terminals, 6. Circuit board, 7. Metal film resistor element, 8. Two-speed three-pin toggle switch, 9. Circuit board fixing screws, 10. Fixing holes, 11. Resistance value mark, 12. Rectangular opening, 13. Disconnect status mark. DETAILED DESCRIPTION

[0028] The utility model is described in detail below in conjunction with the accompanying drawings:

[0029] The utility model provides an adjustable multi-resistance resistor box for OBD mass production evaluation test, such as Figure 2 and Figure 3 As shown, it includes a resistor box, a circuit board 6 arranged in the resistor box, a resistor element and a resistor switch 3 constituting a circuit arranged on the circuit board 6, and also includes a plug-in terminal 5 arranged on the resistor box; Figure 2 and Figure 3 As shown, the resistor box includes a resistor box body 1 of a box structure made of plastic material with an open front, a circuit board 6 is fixed in the resistor box body 1, a resistor box cover body 2 made of plastic material covers the front opening of the resistor box body 1, an opening matching the circuit board 6 is opened on the resistor box cover body 2, a resistor panel 4 made of plastic material matching the opening on the resistor box cover body 2 is fixed in the opening of the resistor box cover body 2 by bonding, and a plug-in terminal 5 includes an input end and an output end fixedly arranged on a side surface of the resistor box body 1;

[0030] like Figure 3 and Figure 5 As shown, the resistance switch 3 is a plurality of two-speed three-pin toggle switches 8 connected in sequence, in each of two adjacent two-speed three-pin toggle switches 8, the normally closed end of the first two-speed three-pin toggle switch 8 is connected to the common end of the second two-speed three-pin toggle switch 8, the common end of the first two-speed three-pin toggle switch 8 is connected to the input end of the plug-in terminal 5, and the normally closed end of the last two-speed three-pin toggle switch 8 is connected to the output end of the plug-in terminal 5;

[0031] The resistance components are metal film resistor elements 7, the number of which is the same as that of the two-speed three-pin toggle switches 8, and the resistance values ​​of all the metal film resistor elements 7 are different. A metal film resistor element 7 is connected between each two adjacent two-speed three-pin toggle switches 8, one end of the metal film resistor element 7 between two adjacent two-speed three-pin toggle switches 8 is connected to the normally open end of the previous adjacent two-speed three-pin toggle switch 8, the other end of the metal film resistor element 7 between two adjacent two-speed three-pin toggle switches 8 is connected to the common end of the next adjacent two-speed three-pin toggle switch 8, one end of the last metal film resistor element 7 is connected to the normally open ends of the last two two-speed three-pin toggle switches 8, and the other end of the last metal film resistor element 7 is connected to the output end of the plug-in terminal 5;

[0032] When the lever of the two-stage three-pin toggle switch 8 adjacent to the previous metal film resistor element 7 is toggled until the common end of the two-stage three-pin toggle switch 8 is connected to the normally open end, the metal film resistor element 7 is connected to the circuit; when the lever of the two-stage three-pin toggle switch 8 adjacent to the previous metal film resistor element 7 is toggled until the common end of the two-stage three-pin toggle switch 8 is connected to the normally closed end, the metal film resistor element 7 is disconnected from the circuit;

[0033] like Figure 4 As shown, a rectangular opening 12 corresponding to the two-speed three-pin toggle switch 8 is opened on the resistor panel 4 for exposing the lever of the corresponding two-speed three-pin toggle switch 8 to facilitate the up and down toggle operation. A dot-shaped access status mark 13 is engraved on the resistor panel 4 at the upper right of the rectangular opening 12, which is used to indicate that the lever of the corresponding two-speed three-pin toggle switch 8 is moved to the upper gear position, thereby connecting the common end and the normally open end of the two-speed three-pin toggle switch 8. A resistance value mark 11 is engraved on the resistor panel 4 at the lower right of the rectangular opening 12, i.e., below the access status mark 13, which is used to indicate the resistance value of the metal film resistor element 7 that can be connected when the lever of the corresponding two-speed three-pin toggle switch 8 is moved to the upper gear position.

[0034] In this embodiment, Figure 3 As shown, the resistor box cover body 2 is fixedly connected to the resistor box body 1 through a plurality of fixing holes 10 and bolts.

[0035] In this embodiment, Figure 3 As shown, the circuit board 6 is fixedly connected to the resistor box body 1 by a plurality of circuit board fixing screws 9. Specifically, a commonly used fixing method in the prior art can be adopted. For example, a plurality of circuit board fixing columns with a certain height perpendicular to the rear surface of the resistor box body 1 are provided on the rear surface of the resistor box body 1, and the circuit board 6 is fixed in the resistor box body 1 by circuit board fixing holes corresponding to the circuit board fixing columns and circuit board fixing screws 9 opened on the circuit board 6.

[0036] In order to facilitate the external connection of the resistor box through the male wire and to distinguish the input end from the output end, the plug-in terminal 5 is two banana plug female sockets of different colors, of which the red banana plug female socket is the input end and the black banana plug female socket is the output end.

[0037] Embodiment 1

[0038] The utility model provides an adjustable multi-resistance resistor box for OBD mass production evaluation test, which provides an embodiment for the number and specific connection relationship of the two-speed three-pin toggle switch 8 and the metal film resistor element 7 on the circuit board 6, such as Figure 5As shown, there are a total of twenty-eight two-position three-leg toggle switches 8 connected in sequence in a serpentine arrangement in seven columns evenly spaced from left to right, with four of them being evenly spaced in one column. That is, the two-position three-leg toggle switch 8 at the bottom in each column and the two-position three-leg toggle switch 8 at the top in the next column adjacent to it are adjacent to each other.

[0039] There are a total of twenty-eight metal film resistor elements 7 with resistance values ​​of 1Ω, 2Ω, 3Ω, 4Ω, 10Ω, 20Ω, 30Ω, 40Ω, 100Ω, 200Ω, 300Ω, 400Ω, 1KΩ, 2KΩ, 3KΩ, 4KΩ, 10KΩ, 20KΩ, 30KΩ, 40KΩ, 100KΩ, 200KΩ, 300KΩ, 400KΩ, 1MΩ, 2MΩ, 3MΩ and 4MΩ, which are sequentially connected between two adjacent two-speed three-leg toggle switches 8.

[0040] The specific connection relationship is as follows:

[0041] like Figure 5 As shown, every four two-speed three-pin toggle switches 8 are evenly spaced in a row, and there are seven evenly spaced rows from left to right. Take the first row from left to right as an example:

[0042] The common end of the first two-speed three-pin toggle switch 8 in the first column is connected to the input end of the plug-in terminal 5, the normally open end of the first two-speed three-pin toggle switch 8 in the first column is connected to one end of the metal film resistor element 7 with a resistance value of 1Ω, the normally closed end of the first two-speed three-pin toggle switch 8 in the first column and the other end of the metal film resistor element 7 with a resistance value of 1Ω are connected to the common end of the second two-speed three-pin toggle switch 8 in the first column; the normally open end of the second two-speed three-pin toggle switch 8 in the first column is connected to one end of the metal film resistor element 7 with a resistance value of 2Ω, the normally closed end of the second two-speed three-pin toggle switch 8 in the first column and the other end of the metal film resistor element 7 with a resistance value of 2Ω are connected to the common end of the third two-speed three-pin toggle switch 8 in the first column;

[0043] The normally open end of the third two-position three-pin toggle switch 8 in the first column is connected to one end of the metal film resistor element 7 with a resistance value of 3Ω, and the normally closed end of the third two-position three-pin toggle switch 8 in the first column and the other end of the metal film resistor element 7 with a resistance value of 3Ω are connected to the common end of the fourth two-position three-pin toggle switch 8 in the first column;

[0044] The normally open end of the fourth two-position three-pin toggle switch 8 in the first column is connected to one end of the metal film resistor element 7 with a resistance value of 4Ω, and the normally closed end of the fourth two-position three-pin toggle switch 8 in the first column and the other end of the metal film resistor element 7 with a resistance value of 4Ω are connected to the common end of the first two-position three-pin toggle switch 8 in the second column;

[0045] By analogy, the common end of the last two-position three-pin toggle switch 8 in the seventh column, which is the last column, is connected to the other end of the metal film resistor element 7 with a resistance value of 3MΩ and the normally closed end of the second-to-last two-position three-pin toggle switch 8 in the last column, and the normally open end of the last two-position three-pin toggle switch 8 in the last column is connected to one end of the metal film resistor element 7 with a resistance value of 4MΩ, and the other end of the metal film resistor element 7 with a resistance value of 4MΩ and the normally closed end of the last two-position three-pin toggle switch 8 in the last column are both connected to the output end of the plug-in terminal 5. The working principle of an adjustable multi-resistance resistor box for OBD mass production evaluation test provided by the utility model is as follows:

[0046] When the two-stage three-pin toggle switch 8 is in a non-working state (such as Figure 2 As shown, that is, when the lever of the two-speed three-pin toggle switch 8 is in the upper gear position), the corresponding metal film resistor element 7 is disconnected from the circuit, and the circuit board 6 is equivalent to a wire connected to the circuit; when the two-speed three-pin toggle switch 8 is in the working state (such as Figure 2 As shown, that is, when the lever of the two-speed three-pin toggle switch 8 is in the lower gear), the corresponding metal film resistor element 7 is connected to the circuit, and the desired resistance value is obtained by cumulative method according to the required resistance size, and the two-speed three-pin toggle switch 8 corresponding to the metal film resistor element 7 is opened in turn, and the metal film resistor element 7 is connected to the circuit.

[0047] The utility model provides an adjustable multi-resistance resistor box for OBD mass production evaluation test. The specific method of using the resistor box during testing is as follows:

[0048] According to the OBD system's mass production vehicle evaluation test monitoring verification requirements and verification operation manual, determine the resistance value required for the test. The resistance value selection is divided into two modes:

[0049] One is direct selection, that is, selecting the metal film resistor element 7 corresponding to the single resistance mark 11 marked on the resistance panel 4, and moving the lever of the corresponding resistance switch 3 (that is, the two-stage three-pin toggle switch 8) downward to the upper gear position. Figure 5 The position of the dot-shaped access status mark 13 shown in the figure indicates that the metal film resistor element 7 corresponding to the resistance mark 11 has been connected to the circuit, and the levers of the resistance switches 3 (i.e., the two-stage three-pin toggle switch 8) of all other metal film resistor elements 7 corresponding to the resistance marks 11 are all moved downward to the lower position. Figure 5 The position of the resistance mark 11 shown indicates that the metal film resistor elements 7 corresponding to all other resistance marks 11 are not connected to the circuit, one male wire is connected to the input end of the plug-in terminal 5, and another male wire is connected to the output end of the plug-in terminal 5. The resistance box is connected in series / in parallel to the test verification equipment according to the test requirements, and the validity of the test results is monitored by the test equipment;

[0050] The other is a combination selection method. If a single resistor cannot meet the test requirements, a cumulative method is adopted to select the metal film resistor elements 7 corresponding to the multiple resistance marks 11 marked on the resistance panel 4, and the lever of the corresponding resistance switch 3 (that is, the two-stage three-pin toggle switch 8) is moved to the upper gear position. Figure 5 The position of the dot-shaped access status mark 13 shown in the figure indicates that the metal film resistor elements 7 corresponding to the resistance switches 3 (i.e., the two-stage three-pin toggle switches 8) whose levers have been moved upward to the upper gear position have been connected in series to the circuit; the levers of the resistance switches 3 (i.e., the two-stage three-pin toggle switches 8) of the metal film resistor elements 7 corresponding to all other resistance value marks 11 have been moved downward to the lower gear position, i.e., Figure 5 The position of the resistance mark 11 shown indicates that the metal film resistor element 7 corresponding to the resistance switch 3 (i.e., the two-speed three-pin toggle switch 8) whose levers have been moved downward to the lower position is not connected to the circuit. At this time, the resistance provided by the resistance box is the sum of the resistance values ​​of the metal film resistor elements 7 that have been connected in series to the circuit. One male wire is connected to the input end of the connector terminal 5, and the other male wire is connected to the output end of the connector terminal 5. The resistance box is connected in series / parallel to the test verification equipment according to the test requirements, and the validity of the test results is monitored using the test equipment.

Claims

1. An adjustable multi-resistance resistor box for OBD mass production evaluation test, comprising a resistor box, a circuit board (6) arranged in the resistor box, a resistor element and a resistor switch (3) arranged on the circuit board (6) to form a circuit, and a plug-in terminal (5) arranged on the resistor box, characterized in that: The resistor box comprises a resistor box body (1) of a box structure made of plastic material with an open front, a circuit board (6) fixed in the resistor box body (1), a resistor box cover body (2) made of plastic material covering the open front of the resistor box body (1), an opening matching the circuit board (6) being formed on the resistor box cover body (2), a resistor panel (4) made of plastic material matching the opening on the resistor box cover body (2) being fixed in the opening of the resistor box cover body (2) by bonding, and a plug-in terminal (5) comprising an input end and an output end fixedly arranged on a side surface of the resistor box body (1); The resistance switch (3) is a plurality of two-speed three-pin toggle switches (8) connected in sequence, wherein in each of two adjacent two-speed three-pin toggle switches (8), the normally closed end of the first two-speed three-pin toggle switch (8) is connected to the common end of the second two-speed three-pin toggle switch (8), the common end of the first two-speed three-pin toggle switch (8) is connected to the input end of the plug-in terminal (5), and the normally closed end of the last two-speed three-pin toggle switch (8) is connected to the output end of the plug-in terminal (5); The resistance components are metal film resistor elements (7) having the same number as the two-speed three-pin toggle switches (8), and the resistance values ​​of all the metal film resistor elements (7) are different. A metal film resistor element (7) is connected between each two adjacent two-speed three-pin toggle switches (8), one end of the metal film resistor element (7) between the two adjacent two-speed three-pin toggle switches (8) is connected to the normally open end of the previous adjacent two-speed three-pin toggle switch (8), the other end of the metal film resistor element (7) between the two adjacent two-speed three-pin toggle switches (8) is connected to the common end of the next adjacent two-speed three-pin toggle switch (8), one end of the last metal film resistor element (7) is connected to the normally open ends of the last two two-speed three-pin toggle switches (8), and the other end of the last metal film resistor element (7) is connected to the output end of the plug-in terminal (5); When the lever of the two-stage three-pin toggle switch (8) adjacent to the previous metal film resistor element (7) is toggled until the common end of the two-stage three-pin toggle switch (8) is connected to the normally open end, the metal film resistor element (7) is connected to the circuit; when the lever of the two-stage three-pin toggle switch (8) adjacent to the previous metal film resistor element (7) is toggled until the common end of the two-stage three-pin toggle switch (8) is connected to the normally closed end, the metal film resistor element (7) is disconnected from the circuit; The resistor panel (4) is provided with a rectangular opening (12) corresponding to each of the two-speed three-pin toggle switches (8) for exposing the lever of the corresponding two-speed three-pin toggle switch (8) to facilitate the up and down toggle operation. A dot-shaped access status mark (13) is engraved on the resistor panel (4) at the upper right of the rectangular opening (12) for indicating that the lever of the corresponding two-speed three-pin toggle switch (8) is toggled to the upper gear position, thereby connecting the common end and the normally open end of the two-speed three-pin toggle switch (8). A resistance value mark (11) is engraved on the resistor panel (4) at the lower right of the rectangular opening (12), i.e., below the access status mark (13), for indicating the resistance value of the metal film resistor element (7) that can be connected when the lever of the corresponding two-speed three-pin toggle switch (8) is toggled to the upper gear position.

2. The adjustable multi-resistance resistor box for OBD mass production evaluation test according to claim 1, characterized in that: The resistor box cover body (2) is fixedly connected to the resistor box body (1) via a plurality of fixing holes (10) and bolts.

3. The adjustable multi-resistance resistor box for OBD mass production evaluation test according to claim 1, characterized in that: The circuit board (6) is fixedly connected to the resistor box body (1) via a plurality of circuit board fixing screws (9).

4. The adjustable multi-resistance resistor box for OBD mass production evaluation test according to claim 1, characterized in that: The plug-in terminal (5) is two banana plug female sockets of different colors, wherein the red banana plug female socket is the input terminal and the black banana plug female socket is the output terminal.

5. An adjustable multi-resistance resistor box for OBD mass production evaluation test according to any one of claims 1 to 4, characterized in that: A total of twenty-eight two-position three-pin toggle switches (8) are connected in sequence in a serpentine arrangement in seven columns evenly spaced from left to right, with four of them being evenly spaced in a column. That is, the two-position three-pin toggle switch (8) at the bottom in each column and the two-position three-pin toggle switch (8) at the top in the next column adjacent thereto are adjacent to each other.

6. The adjustable multi-resistance resistor box for OBD mass production evaluation test according to claim 5, characterized in that: A total of twenty-eight metal film resistor elements (7) with resistance values ​​of 1Ω, 2Ω, 3Ω, 4Ω, 10Ω, 20Ω, 30Ω, 40Ω, 100Ω, 200Ω, 300Ω, 400Ω, 1KΩ, 2KΩ, 3KΩ, 4KΩ, 10KΩ, 20KΩ, 30KΩ, 40KΩ, 100KΩ, 200KΩ, 300KΩ, 400KΩ, 1MΩ, 2MΩ, 3MΩ and 4MΩ are sequentially connected between two adjacent two-speed three-pin toggle switches (8).

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