Contact detection device for EOL test

Abstract

The utility model discloses a contact detection device used for an EOL test. The contact detection device comprises a driving mechanism, two contact electrodes and two cables. The driving mechanism is in transmission connection with the two contact electrodes and is used for driving the two contact electrodes to move towards each other or away from each other, so that the contact electrodes are in contact with or away from the to-be-detected object; one end of the cable is electrically connected to the contact electrode, and the other end of the cable is connected to an external EOL testing device; the contact electrode is provided with a contact layer, the contact electrode is further provided with two contact sensors, the contact sensors are electrically connected to the EOL testing device, and when the driving mechanism drives the two contact electrodes to clamp an object to be tested, the contact layer and the contact sensors abut against the object to be tested. The EOL testing device has extremely high use flexibility and universality, clamping force can be accurately controlled to avoid uneven contact pressure, the voltage difference between the contact sensor and the surface of an object to be tested can be monitored in real time to judge whether the contact layer is in good contact with the object to be tested, and the accuracy and reliability of EOL testing are improved.

Description

Technical Field

[0001] This utility model relates to the field of EOL testing technology, and in particular to a contact detection device for EOL testing. Background Technology

[0002] In the manufacturing process of electronic products, EOL (End of Line) testing is a crucial step in ensuring product quality and performance. EOL testing verifies whether an object under test (such as a circuit board or component) meets design specifications and functional requirements by performing electrical performance tests. In this process, contact devices play a vital role, establishing the electrical connection between the test equipment and the object under test, thereby accurately transmitting test signals and collecting test results.

[0003] Traditional contact devices often employ cylindrical wall contact, vertical single-sided horizontal contact, or double-plane screw-locking contact. While these contact methods can meet basic testing requirements to some extent, they have several limitations. For example, cylindrical wall contact may lead to poor contact due to limited contact area, affecting the accuracy of test results; vertical single-sided horizontal contact may cause test errors due to uneven contact pressure; and while double-plane screw-locking contact is relatively stable, it is cumbersome to operate and not conducive to a fast and efficient EOL testing process.

[0004] More importantly, traditional contact methods generally lack a real-time monitoring mechanism for the contact status. Once poor contact occurs, it is often impossible to detect and correct it in time. This not only reduces the accuracy of the test, but may also damage the test object or test equipment by forcibly applying power, causing unnecessary economic losses and safety risks. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of existing contact devices, such as poor contact, uneven contact pressure, and inconvenient operation, and to provide a contact detection device for EOL testing.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This utility model provides a contact detection device for EOL testing, comprising: a drive mechanism, two contact electrodes, and two cables; the drive mechanism is tractively connected to the two contact electrodes and is used to drive the two contact electrodes to move towards each other or away from each other, so that the contact electrodes contact or move away from the test object; one end of the cable is electrically connected to the contact electrode, and the other end is connected to an external EOL testing device; the contact electrode is provided with a contact layer, and the contact electrode is also equipped with two contact sensors, which are electrically connected to the EOL testing device; when the drive mechanism drives the two contact electrodes to clamp the test object, the contact layer and the contact sensors abut against the test object.

[0008] In one embodiment, the two contact electrodes are symmetrically arranged, and each contact electrode includes an electrode portion, a drive connection portion, and a cable connection portion; the electrode portion and the cable connection portion are respectively connected to the two ends of the drive connection portion, the contact layer is disposed on the electrode portion, the contact sensor is mounted on the electrode portion, the cable connection portion is connected to the cable, and the drive connection portion is also drively connected to the drive mechanism.

[0009] In one embodiment, the electrode portion has a first mounting cavity, and the contact sensor is mounted in the first mounting cavity; the electrode portion also has a through hole, and the through hole communicates with the first mounting cavity; the contact sensor has a contact end, and the contact end extends into the through hole and is flush with the contact layer.

[0010] In one embodiment, an insulating layer is provided on the outer periphery of the contact end, and the insulating layer forms a transition fit with the through hole.

[0011] In one embodiment, the contact sensor is further provided with a connection end, one end of which is connected to the contact end, and the other end is connected to the EOL testing device via a wire.

[0012] In one embodiment, the drive connection portion is provided with a second mounting cavity, and the wire is mounted along the first mounting cavity and the second mounting cavity.

[0013] In one embodiment, an insulating protective component is connected to the outer periphery of the contact electrode.

[0014] In one embodiment, the drive mechanism is drive-connected to the insulation protection component.

[0015] In one embodiment, the driving mechanism is a pneumatic gripper.

[0016] In one embodiment, the contact layer consists of a plurality of square pyramids arranged in a matrix.

[0017] The contact detection device for EOL testing of this utility model has the following advantages compared with the prior art: By driving the two contact electrodes through a drive mechanism, it is possible to easily clamp and release the test objects of different sizes, improving the flexibility and versatility of the contact detection device. Furthermore, it can precisely control the clamping force between the contact electrodes and the test object, ensuring stable contact and avoiding test errors caused by uneven contact pressure. In addition, by setting a contact sensor on the contact electrode, it enables real-time monitoring of the voltage difference between the contact sensor and the surface of the test object, thereby accurately determining whether the contact layer is in good contact with the test object, effectively avoiding test errors caused by poor contact, and improving the accuracy and reliability of EOL testing.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the contact detection device for EOL testing provided by this utility model;

[0021] Figure 2 An exploded view of the contact detection device for EOL testing provided by this utility model;

[0022] Figure 3 An exploded view of the contact electrode provided by this utility model;

[0023] Figure 4 A schematic diagram of the contact electrode provided by this utility model;

[0024] Figure 5 A side view of the contact electrode provided by this utility model. Attached Figure Description

[0026] 1. Drive mechanism; 11. Second connecting hole; 2. Contact electrode; 21. Electrode part; 211. Contact layer; 212. First mounting cavity; 213. Through hole; 22. Drive connection part; 221. Second mounting cavity; 23. Cable connection part; 231. Cable contact surface; 3. Cable; 4. Contact sensor; 41. Contact end; 42. Insulation layer; 43. Connection end; 5. Insulation protection assembly; 51. First insulation protection shell; 52. Second insulation protection shell; 53. Third insulation protection shell; 531. Vertical groove; 6. Mounting base; 61. First connecting hole; 7. Flexible connection assembly; 71. Equal height bolt; 72. Elastic sleeve. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] 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. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring 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. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0034] See Figures 1 to 5 As shown, this utility model discloses a specific embodiment of a contact detection device for EOL testing, including: a drive mechanism 1, two contact electrodes 2, and two cables 3; the drive mechanism 1 is driven to the two contact electrodes 2 and is used to drive the two contact electrodes 2 to move towards each other or away from each other, so that the contact electrodes 2 contact or move away from the test object; one end of the cable 3 is electrically connected to the contact electrode 2, and the other end is connected to an external EOL testing device; the contact electrode 2 is provided with a contact layer 211, and the contact electrode 2 is also equipped with two contact sensors 4, which are electrically connected to the EOL testing device. When the drive mechanism 1 drives the two contact electrodes 2 to clamp the test object, the contact layer 211 and the contact sensors 4 abut against the test object.

[0035] Specifically, the contact sensor 4 is used to contact the object under test and detect the voltage difference formed between the contact sensor 4 and the surface of the object under test, and transmits the real-time detected voltage difference to the EOL test device. The voltage difference detected can be used to determine whether the contact sensor 4 and the surface of the object under test are in good contact, thereby determining whether the contact layer 211 and the object under test are in good contact.

[0036] More specifically, when the drive mechanism 1 drives the two contact electrodes 2 to clamp the object under test (DUT), the contact layer 211 and the contact sensor 4 both abut against the DUT. At this time, the two contact sensors 4, the surfaces of the DUT they contact, and the EOL testing device form a voltage detection circuit. The two contact electrodes 2, the DUT, the cable 3, and the EOL testing device form a test circuit. The EOL testing device supplies power to the contact sensors 4 so that the contact sensors 4 detect the voltage difference formed between the contact sensors 4 and the surface of the DUT. When the voltage difference is large, it can be determined that the contact layer 211 and the DUT are not in good contact. In this case, the EOL testing device stops supplying power to the contact electrodes 2, and the drive mechanism 1 drives the contact electrodes 2 to continue moving towards the DUT. When the detected voltage difference is equal to or less than a preset voltage difference value (e.g., 500mV), it is determined that the contact layer 211 and the DUT are in good contact. The drive mechanism 1 stops driving the contact electrodes 2, and the EOL testing device starts supplying power to the contact electrodes 2 and performs the test. By setting up a contact sensor 4 and detecting the voltage difference between it and the surface of the test object, the accuracy of the contact layer 211 and the test object can be determined more accurately, thereby improving the accuracy and reliability of the test. This also effectively avoids damage to the test object or testing equipment caused by forced energization when there is poor contact, thus protecting the safety of the test object and testing equipment. Furthermore, by driving the two contact electrodes 2 through the drive mechanism 1, which drives them to move in opposite directions, the contact electrodes 2 can easily clamp and release test objects of different sizes and shapes, improving the flexibility and versatility of the contact detection device. In addition, the contact sensor 4 can precisely control the clamping force between the contact electrodes 2 and the test object, making the contact between the contact electrodes 2 and the contact sensor 4 and the test object more stable. This also avoids test errors caused by uneven contact pressure, ensuring that the test path formed during testing will not have poor contact, further improving the safety, accuracy, and reliability of EOL testing.

[0037] In one specific embodiment, two contact electrodes 2 are symmetrically arranged. Each contact electrode 2 includes an electrode portion 21, a drive connection portion 22, and a cable connection portion 23. The electrode portion 21 and the cable connection portion 23 are respectively connected to the two ends of the drive connection portion 22. A contact layer 211 is disposed on the electrode portion 21. The contact sensor 4 is mounted on the electrode portion 21. The cable connection portion 23 is connected to the cable 3. The drive connection portion 22 is also drively connected to the drive mechanism 1.

[0038] Specifically, both the electrode portion 21 and the cable connection portion 23 are perpendicularly connected to the drive connection portion 22, making the contact electrode 2 Z-shaped. This allows the contact electrode 2 to maintain its functionality while achieving a more stable structure and a more compact layout, saving space and making it suitable for testing in confined spaces. Furthermore, since the contact sensor 4 is mounted on the electrode portion 21, it can more accurately contact the surface of the test object, thereby obtaining more precise voltage difference data and improving the accuracy and reliability of EOL testing. More specifically, the electrode portion 21, the cable connection portion 23, and the drive connection portion 22 are integrally molded, making the structural strength and conductivity of the contact electrode 2 more stable.

[0039] In one specific embodiment, the end of the cable connection portion 23 away from the object to be tested is provided with a cable contact surface 231, and the cable 3 is connected to the cable contact surface 231.

[0040] Specifically, cable 3 is fitted to cable contact surface 231 to ensure a stable connection between cable 3 and contact electrode 2, thereby improving the accuracy and reliability of EOL testing. Furthermore, by positioning cable contact surface 231 on the side of cable connection 23 away from the test object, the installation position of cable 3 can avoid drive connection 22 and drive mechanism 1, thus not affecting the normal operation of drive mechanism 1, improving the overall stability of the contact detection device, and also making the structure more compact.

[0041] In one specific embodiment, the electrode part 21 is provided with a first mounting cavity 212, and the contact sensor 4 is installed in the first mounting cavity 212; the electrode part 21 is also provided with a through hole 213, and the through hole 213 communicates with the first mounting cavity 212; the contact sensor 4 is provided with a contact end 41, and the contact end 41 extends into the through hole 213 and is flush with the contact layer 211.

[0042] Specifically, by providing a first mounting cavity 212 within the electrode portion 21 and mounting the contact sensor 4 within the first mounting cavity 212, the installation and removal of the contact sensor 4 becomes more convenient. This also makes the structure of the contact electrode 2 more compact, reducing the amount of structure exposed on the contact electrode 2 and contributing to improved reliability and stability. The contact end 41 of the contact sensor 4 extends from the surface of the electrode portion 21 through the through hole 213 and is flush with the contact layer 211. This design ensures consistency between the contact pressure between the contact sensor 4 and the test object and the contact pressure between the contact layer 211 and the test object, allowing for more accurate determination of whether the contact layer 211 is in good contact with the test object. This avoids test errors caused by poor contact, thereby improving test accuracy and reliability. Simultaneously, it effectively prevents damage to the test object or testing equipment caused by forcibly applying power when there is poor contact, thus protecting the safety of the test object and testing equipment.

[0043] In one specific embodiment, an insulating layer 42 is provided on the outer periphery of the contact end 41, and the insulating layer 42 forms a transition fit with the through hole 213.

[0044] Specifically, the insulating layer 42 on the outer periphery of the contact end 41 provides an additional electrical isolation layer between the contact sensor 4 and the electrode part 21, thereby preventing current from flowing between the contact sensor 4 and the electrode part 21. This avoids electrical interference between the voltage detection circuit and the test circuit, except for the EOL test device, ensuring the accuracy and reliability of the test results. At the same time, the transition fit between the insulating layer 42 and the through hole 213 ensures the stable installation of the sensor, preventing the contact end 41 from shifting and no longer being flush with the contact layer 211 due to mechanical vibration or impact. This allows for accurate determination of whether the contact layer 211 is in good contact with the object under test, improving the accuracy and reliability of the test.

[0045] In one specific embodiment, the contact sensor 4 is further provided with a connection end 43, one end of which is connected to the contact end 41, and the other end is connected to the EOL testing device through a wire (not shown in the figure).

[0046] Specifically, the connection end 43 is located within the first mounting cavity 212 and is connected to the EOL testing device via a wire. Connecting the connection end 43 to the EOL testing device via a wire effectively isolates the connection end 43 from the contact electrode 2, thereby avoiding mutual interference between the connection end 43 and the contact electrode 2 that could lead to errors in voltage difference detection and EOL testing, thus improving the accuracy and stability of the test.

[0047] In one specific embodiment, the drive connection part 22 is provided with a second mounting cavity 221, and the wire is installed along the first mounting cavity 212 and the second mounting cavity 221.

[0048] Specifically, the first mounting cavity 212 is located on the opposite side of the contact layer 211 on the electrode part 21, and the second mounting cavity 221 is located on the drive connection part 22 near the first mounting cavity 212, with the first mounting cavity 212 communicating with the second mounting cavity 221. By mounting the wires along the first mounting cavity 212 and the second mounting cavity 221, the arrangement of the wires is more orderly and compact, which helps to avoid the confusion and tangling of the wires, thereby reducing test failures or errors caused by wire problems. At the same time, it also avoids the wires affecting the drive mechanism 1's driving of the contact fingers, thus ensuring the normal driving of the contact fingers by the drive mechanism 1, making the structure of the contact detection device more compact and stable.

[0049] In one specific embodiment, an insulating protection component 5 is connected to the outer periphery of the contact electrode 2.

[0050] Specifically, the insulation protection component 5 includes a first insulation protection shell 51, a second insulation protection shell 52, and a third insulation protection shell 53. The first insulation protection shell 51 is connected to the outside of the electrode portion 21, while the second and third insulation protection shells 52 and 53 are connected to the outside of the drive connection portion 22 and the cable connection portion 23. This electrically isolates the contact electrode 2 from the external environment, preventing current from flowing to the outside and avoiding safety hazards such as electrical short circuits or electric shocks. Furthermore, the insulation protection component 5 provides additional support and protection for the contact electrode 2, thereby improving the structural strength of the contact electrode 2 and making it more robust and durable.

[0051] More specifically, the first insulating protective shell 51 is connected to and covers the outer surface of the electrode part 21 except for the contact layer 211, and the second insulating protective shell 52 is connected to the side of the drive connection part 22 where the second mounting cavity 221 is provided. This effectively reduces the insulation dead angle, and the first mounting cavity 212 and the second mounting cavity 221 are also covered by the first insulating protective shell 51 and the second insulating protective shell 52, respectively. This electrically isolates the temperature sensor and wires from the external environment and also prevents the temperature sensor and wires from falling off or loosening from the first mounting cavity 212 and the second mounting cavity 221. This makes the structure of the contact detection device more compact and stable.

[0052] Furthermore, the third insulating protective shell 53 is provided with a vertical groove 531, in which the drive connection part 22 and the cable connection part 23 are installed. This ensures that the side of the drive connection part 22 closest to the drive mechanism 1 and its front and rear sides, as well as the front and rear sides of the cable connection part 23, are covered by the third insulating protective shell 53. This design provides electrical isolation between the drive connection part 22 and the cable connection part 23 and the outside environment, effectively preventing current from accidentally leaking to the external environment or adjacent components. This reduces electrical safety risks such as electric shock and short circuits, improves the stability and reliability of the entire contact detection device, and also prevents the drive connection part 22 and the cable connection part 23 from physical damage such as impact and wear from external objects, extending the service life of these components. In addition, the design of the vertical groove 531 makes the connection structure between the drive connection part 22, the cable connection part 23, and the third insulating protective shell 53 more compact and stable, reducing space occupation.

[0053] In one specific embodiment, the drive mechanism 1 is drive-connected to the insulation protection component 5.

[0054] Specifically, the drive connection 22 is connected to the vertical groove 531 on the third insulating protective shell 53, and the drive mechanism 1 is connected to the side of the third insulating protective shell 53 away from the drive connection 22. Through the design of the third insulating protective shell 53, it is ensured that the drive mechanism 1 will not be affected by the electrical interference of the drive connection 22 during operation, thus preventing abnormal operation or malfunction. Furthermore, the third insulating protective shell 53 is directly connected to the drive mechanism 1, ensuring that the drive mechanism 1 can achieve efficient driving of the contact electrode 2 within a limited space.

[0055] Furthermore, all surfaces of the contact electrode 2, except for the cable contact surface 231 and the contact layer 211, are electroplated or sprayed with an insulating layer 42 (not shown in the figure). Combined with the insulation protection component 5, this further reduces electromagnetic interference between the contact electrode 2 and other components, thereby effectively maintaining the stability and accuracy of the signal. At the same time, it can also protect the contact electrode 2 from environmental factors, reducing maintenance and replacement costs caused by corrosion.

[0056] In one specific embodiment, the contact detection device for EOL testing further includes a mounting base 6 and a flexible connection component 7, with the drive mechanism 1 connected to the mounting base 6 via the flexible connection component 7.

[0057] Specifically, the flexible connection component 7 allows the drive mechanism 1 to have a certain range of motion on the mounting base 6. This makes it easier for technicians to adjust the position and angle of the drive mechanism 1 during commissioning to ensure optimal contact between the contact detection device and the workpiece under test, thereby improving the accuracy and reliability of the test and enabling the contact detection device to more flexibly adapt to different test requirements and workpiece shapes. At the same time, the flexible connection component 7 can absorb and isolate vibrations from the drive mechanism 1 or the external environment, thereby reducing the impact of these vibrations on the contact detection device and the workpiece under test. This helps to reduce test errors and improve test stability.

[0058] In one specific embodiment, the flexible connection assembly 7 includes an equal-height bolt 71 and an elastic sleeve 72. The mounting base 6 is provided with a first connection hole 61, and the drive mechanism 1 is provided with a second connection hole 11. The equal-height bolt 71 extends into the first connection hole 61 and the second connection hole 11 to connect the mounting base 6 and the drive mechanism 1, and the elastic sleeve 72 is fitted onto the equal-height bolt 71.

[0059] Specifically, due to the presence of the elastic component 72, a small gap exists between the leveling bolt 71 and the first connecting hole 61 and the second connecting hole 11. This allows for a certain amount of slight horizontal displacement between the mounting base 6 and the drive mechanism 1, effectively eliminating installation errors and motion accuracy errors in the horizontal direction between the mounting base 6 and the drive mechanism 1. This ensures that the contact electrode 2 maintains good contact with the object under test, improving the accuracy and reliability of the test. Furthermore, a movable gap (not shown in the figure) is also provided between the drive mechanism 1 and the mounting base 6, allowing for a certain amount of vertical movement between them. This effectively disperses stress in the vertical direction, preventing loosening or damage caused by vibration or external forces. It is understood that in various embodiments, the elastic component 72 can be a spring, a rubber component, an elastic washer, or other similar components.

[0060] In one specific embodiment, the drive mechanism 1 is a pneumatic gripper.

[0061] Specifically, the gripper fingers of the cylinder chuck are driven to the third insulating protective shell 53 to achieve the drive connection between the drive mechanism 1 and the drive connection part 22. This arrangement ensures that the drive mechanism 1 can stably control the movement of the contact electrode 2 and accurately control the clamping force between the two contact electrodes 2, while also ensuring the stable transmission of the test signal.

[0062] In one specific embodiment, the contact layer 211 is composed of a plurality of square pyramids (not shown in the figure) arranged in a matrix.

[0063] Specifically, the contact layer 211, formed by a matrix of several quadrangular pyramids, allows the current to be distributed more evenly, reducing current concentration and hot spot effects. This helps to reduce energy consumption, improve current transmission efficiency, and extend the service life of the contact electrode 2. At the same time, due to the increased contact area and optimized structure, the contact resistance between the contact electrode 2 and the object under test is reduced, which helps to improve the sensitivity of signal acquisition, reduce noise interference, and improve the performance of the entire test system.

[0064] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A contact detection device for EOL testing, characterized in that, include: The device comprises a drive mechanism, two contact electrodes, and two cables. The drive mechanism is connected to the two contact electrodes and drives them to move towards or away from each other, so that the contact electrodes contact or move away from the test object. One end of each cable is electrically connected to the contact electrode, and the other end is connected to an external EOL testing device. Each contact electrode has a contact layer and is also equipped with two contact sensors, which are electrically connected to the EOL testing device. When the drive mechanism drives the two contact electrodes to clamp the test object, both the contact layer and the contact sensors abut against the test object.

2. The contact detection device for EOL testing according to claim 1, characterized in that, The two contact electrodes are symmetrically arranged. Each contact electrode includes an electrode portion, a drive connection portion, and a cable connection portion. The electrode portion and the cable connection portion are respectively connected to the two ends of the drive connection portion. The contact layer is disposed on the electrode portion. The contact sensor is mounted on the electrode portion. The cable connection portion is connected to the cable. The drive connection portion is also drively connected to the drive mechanism.

3. The contact detection device for EOL testing according to claim 2, characterized in that, The electrode portion has a first mounting cavity, and the contact sensor is mounted in the first mounting cavity; the electrode portion also has a through hole, and the through hole communicates with the first mounting cavity; the contact sensor has a contact end, and the contact end extends into the through hole and is flush with the contact layer.

4. The contact detection device for EOL testing according to claim 3, characterized in that, An insulating layer is provided on the outer periphery of the contact end, and the insulating layer forms a transition fit with the through hole.

5. The contact detection device for EOL testing according to claim 3, characterized in that, The contact sensor is also provided with a connection end, one end of which is connected to the contact end, and the other end is connected to the EOL testing device through a wire.

6. The contact detection device for EOL testing according to claim 5, characterized in that, The drive connection part is provided with a second mounting cavity, and the wire is installed along the first mounting cavity and the second mounting cavity.

7. The contact detection device for EOL testing according to claim 6, characterized in that, An insulating protective component is connected to the outer periphery of the contact electrode.

8. The contact detection device for EOL testing according to claim 7, characterized in that, The drive mechanism is connected to the insulation protection component.

9. The contact detection device for EOL testing according to claim 1, characterized in that, The driving mechanism is a pneumatic gripper.

10. The contact detection device for EOL testing according to claim 1, characterized in that, The contact layer consists of several square pyramids arranged in a matrix.

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