EOL testing device

Abstract

The invention relates to the technical field of EOL testing, in particular to an EOL testing device. The EOL testing device comprises a base, a probe, a linear reciprocating mechanism and a testing circuit, the linear reciprocating mechanism is installed on the base, the probe is electrically connected with the testing circuit, the probe is arranged at the movable end of the linear reciprocating mechanism, the extending end of the probe right faces a connecting welding spot on the back face of a circuit board, and the testing circuit is electrically connected with the probe. The extension end of the probe is provided with a contact part, and the contact part is in plugging cooperation with the connection welding point, so as to achieve the electric connection. According to the EOL testing device, when a circuit needs to be tested, the probes can move towards the connecting welding spots on the back face of the circuit board through the linear reciprocating mechanism until the contact parts on the probes are in plug-in fit with the corresponding connecting welding spots, the EOL testing device is electrically connected with the circuit board, and then testing work is completed; in the process, the probe does not need to be in contact with the PIN needle on the other side of the connection welding point, and the probe can be correspondingly connected with the corresponding contact on the circuit board.

Description

Technical Field

[0001] The present application relates to the technical field of EOL testing, and in particular to an EOL testing device. Background Art

[0002] Existing EOL test devices often need to develop corresponding probes and probes according to the connector models of automotive electronic products, and the development cycle is very time-consuming. In addition, during the test, the PIN pins on the circuit board need to be plugged into the sockets on the probes on the EOL test device. If there is a slight deviation between the sockets on the probes and the PIN pins during this process, it will easily cause the PIN pins of the connector on the circuit board to be distorted by the probes, thereby affecting the subsequent use of the automotive electronic controller. In particular, for some small PIN pins, the PIN pins may even be damaged when the probes are connected to the PIN pins. Summary of the invention

[0003] In order to solve the above technical problems, the present application provides an EOL testing device.

[0004] The present application provides an EOL test device, comprising a base, a probe, a linear reciprocating mechanism and a test circuit, wherein the linear reciprocating mechanism is mounted on the base, the probe is electrically connected to the test circuit, and the probe is arranged at the active end of the linear reciprocating mechanism.

[0005] The extended end of the probe is arranged facing the connection solder joint on the back of the circuit board, and a contact portion is provided at the extended end of the probe, and the contact portion is plugged and matched with the connection solder joint to achieve electrical connection;

[0006] The linear reciprocating mechanism drives the contact portion to be plugged into or separated from the connection welding point.

[0007] Optionally, a contact groove is provided on the contact portion, and the contact groove is concave-convexly matched with the connection welding point.

[0008] Optionally, the peripheral side of the contact groove is provided with a chamfer to form an open structure.

[0009] Optionally, the probe further comprises a probe tube, a sliding rod is provided on the contact portion, the probe tube is sleeved on the sliding rod and slidably cooperates with the sliding rod, and the probe tube is installed at the movable end of the linear reciprocating mechanism.

[0010] Optionally, the inner wall of the probe tube is made of a conductive material, the outer wall of the probe tube is covered with an insulating material, and the sliding rod is electrically connected to the inner wall of the probe tube.

[0011] Optionally, the probe also includes a wire and a spring body, the wire and the sliding rod are respectively arranged at two ends of the probe tube, the spring body is arranged inside the probe tube along the extension direction of the probe tube, one end of the spring body is connected to the sliding rod, and the other end is connected to the wire; the spring body provides an elastic force along the sliding direction of the sliding rod.

[0012] Optionally, a sensor assembly is further included, wherein the sensor assembly is arranged between the probe and the connection solder joint and is used to detect the plug-in relationship between the probe and the connection solder joint.

[0013] Optionally, it also includes a circuit board fixing structure, which includes a fixing base, a limiting block and a suction cup assembly;

[0014] The limiting block and the suction cup assembly are both arranged on the fixed base, the limiting block cooperates with the circumferential limiting function of the circuit board, and the suction cup assembly is fixed by adsorption to the front side of the circuit board.

[0015] Optionally, there are multiple limit blocks, which are arranged on the peripheral side of the circuit board to form a limit groove. The circuit board fixing structure also includes a clamping piece, which is translatedly arranged on the fixed base along a direction approaching or away from the limit groove. The movable end of the clamping piece is provided with an abutment portion that contacts and cooperates with the circuit board.

[0016] Optionally, the linear reciprocating mechanism includes a motor, a crank, a connecting rod and a slider;

[0017] The motor is arranged on the base, the crank is connected to the output shaft of the motor, the probe is arranged on the slider, and the slider is slidably arranged on the base in a direction approaching or moving away from the circuit board. One end of the connecting rod is rotatably connected to the crank, and the other end is rotatably connected to the slider.

[0018] Compared with the prior art, the technical solution provided by the embodiments of the present application has the following advantages:

[0019] The EOL test device provided by the present application can first move the probe toward the connection solder joint on the back of the circuit board through a linear reciprocating mechanism when it is necessary to test the circuit, until the contact portion on the probe is plugged into and matched with the corresponding connection solder joint, and the electrical connection between the EOL test device and the circuit board is completed, thereby completing the test work. This process does not require the probe to contact the PIN needle on the other side of the connection solder joint, and can be connected one-to-one with the corresponding contact point on the circuit board, thereby protecting the structure of the PIN needle from being squeezed and bumped by a traditional probe, and preventing the PIN needle from being bent or even damaged during the EOL test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 This is a schematic diagram of the structure of the EOL test device described in an embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the structure in which a probe in the EOL test device according to an embodiment of the present application is installed on a linear reciprocating mechanism;

[0024] Figure 3 This is a schematic diagram of the structure of a probe in an EOL test device according to an embodiment of the present application;

[0025] Figure 4 This is a schematic diagram of the structure of a sensor assembly in the EOL test device according to an embodiment of the present application;

[0026] Figure 5 This is a schematic structural diagram of a circuit board fixing structure in an EOL test device according to an embodiment of the present application;

[0027] Figure 6 This is a schematic diagram of the structure of the connection between the EOL test device and the circuit board described in an embodiment of the present application.

[0028] Among them, 1. base; 2. probe; 21. contact part; 211. contact groove; 212. chamfer; 213. slide rod; 22. probe tube; 23. wire; 231. insulation skin; 24. spring body; 3. linear reciprocating mechanism; 31. motor; 32. crank; 33. connecting rod; 34. slider; 4. circuit board; 41. connecting solder joint; 5. sensor assembly; 51. light emitting end; 52. light receiving end; 53. light column; 6. circuit board fixing structure; 61. fixed base; 62. limit block; 63. suction cup assembly; 64. clamping piece; 641. abutment part. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0031] Based on this, this embodiment provides an EOL test device, which realizes EOL test by setting the probe on the back of the circuit board and connecting the probe to the connection solder joint on the back of the circuit board, without direct contact with the PIN needle on the front of the circuit board, and can be connected one-to-one with the corresponding contact on the circuit board, so as to protect the structure of the PIN needle from being squeezed, deformed or even damaged by the probe. The following is a detailed description of this through a specific embodiment:

[0032] Reference Figures 1 to 6 As shown, an EOL test device provided in this embodiment includes a base 1, a probe 2, a linear reciprocating mechanism 3 and a test circuit. The linear reciprocating mechanism 3 is installed on the base 1, the probe 2 is electrically connected to the test circuit, the probe 2 is arranged at the movable end of the linear reciprocating mechanism 3, and the extended end of the probe 2 is arranged opposite to the connection solder joint 41 on the back of the circuit board 4. It should be understood that the connection solder joint 41 refers to the solder joint formed on the back of the circuit board 4 when the PIN needle on the circuit board 4 is welded to the circuit board 4. The extended end of the probe 2 is provided with a contact portion 21, and the contact portion 21 is plugged into or separated from the connection solder joint 41.

[0033] The EOL test device provided in this embodiment can first move the probe 2 toward the connection solder joint 41 on the back of the circuit board 4 through the linear reciprocating mechanism 3 when it is necessary to test the circuit, until the contact portion 21 on the probe 2 is plugged into and matched with the corresponding connection solder joint 41, and the electrical connection between the EOL test device and the circuit board is completed, thereby completing the test work. This process does not require the probe 2 to contact the PIN needle on the other side of the connection solder joint 41, and can be connected one-to-one with the corresponding contact point on the circuit board 4, thereby protecting the structure of the PIN needle from being squeezed and bumped by the traditional probe, and preventing the PIN needle from being bent or even damaged during the EOL test.

[0034] In some embodiments, a contact groove 211 is provided on the contact portion 21, and the contact groove 211 is matched with the connecting solder joint 41 in a concave-convex manner; wherein the contact groove 211 can be a hemispherical groove, thereby increasing the contact area with the connecting solder joint 41, and the entire contact portion 21 forms a bowl-shaped structure at the position where the contact groove 211 is provided, thereby improving the stability of the probe 2 when in contact with the connecting solder joint 41 and ensuring the reliability of the electrical connection at the connection.

[0035] In a further embodiment, a chamfer 212 is provided around the contact groove 211 to form an open structure; the chamfer 212 can be a rounded corner or a beveled corner, as long as it can increase the open angle of the contact groove 211 and facilitate the connection between the probe 2 and the connection solder joint 41.

[0036] Continue to refer to Figure 3 As shown, the probe 2 also includes a probe tube 22, a sliding rod 213 is provided on the contact portion 21, the probe tube 22 is sleeved on the sliding rod 213, and slides with the sliding rod 213, and the probe tube 22 is installed at the movable end of the linear reciprocating mechanism 3; through the sliding setting of the sliding rod 213, after the contact portion 21 contacts the connecting solder joint 41, the sliding of the sliding rod 213 can be used to form a buffer to prevent the probe 2 and the circuit board 4 from being damaged by the squeezing force of the probe 2; the inner wall of the probe tube 22 can be made of conductive material, and the outer wall of the probe tube 22 is coated with insulating material, specifically, insulating material such as rubber and plastic can be coated on the outer wall of the probe tube 22, so as to prevent leakage at the connection between the probe 2 and the linear reciprocating mechanism 3, and the sliding rod 213 is electrically connected to the inner wall of the probe tube 22; such a setting can ensure that the contact portion 21 and the test circuit can always achieve a reliable electrical connection relationship during the sliding process of the sliding rod 213.

[0037] In other embodiments, the probe 2 also includes a probe tube 22, a slide bar 213 is provided on the contact portion 21, the probe tube 22 is sleeved on the slide bar 213 and slidably cooperates with the slide bar 213, and the probe tube 22 is installed at the movable end of the linear reciprocating mechanism 3; the probe 2 also includes a wire 23 and a spring body 24, the wire 23 and the slide bar 213 are respectively arranged at both ends of the probe tube 22, the spring body 24 is arranged inside the probe tube 22 along the extension direction of the probe tube 22, one end of the spring body 24 is connected to the slide bar 213, and the other end is connected to the wire 23 The outside of the wire 23 may be covered with an insulating skin 231, and the material of the insulating skin 231 may be an insulating material such as rubber or plastic; the spring body 24 provides elastic force along the sliding direction of the slide bar 213; through the setting of the spring body 24, and the sliding cooperation between the slide bar 213 and the probe tube 22, the spring body 24 can be used to form a buffer after the contact portion 21 contacts the connecting solder point 41, and the spring body 24 can also be used to ensure that the contact portion 21 is reliably connected to the connecting solder point 41 without damaging the structure of the probe 2 and the circuit board 4.

[0038] Continue to refer to Figure 1 and Figure 4As shown, the EOL test device also includes a sensor assembly 5, which is arranged between the probe 2 and the connecting solder joint 41 and is used to detect the plug-in relationship between the probe 2 and the connecting solder joint 41; the sensor assembly 5 can specifically include a light emitting end 51 and a light receiving end 52, and a light column 53 is formed between the light emitting end 51 and the light receiving end 52, the light column 53 corresponds to the position of the connecting solder joint 41, and the extension direction of the light column 53 is perpendicular to the movement direction of the probe 2, and the extension direction of the light column 53 is arranged parallel to the plane where the circuit board 4 is located; when the contact portion 21 on the probe 2 contacts the connecting solder joint 41, the contact portion 21 cuts off the light column 53, and at this time the light receiving end 52 does not receive the light signal, it can be judged that the contact portion 21 has moved into place, and at this time the linear reciprocating mechanism 3 can stop driving the probe 2.

[0039] In other embodiments, the sensor assembly 5 may also be a pressure sensor or an infrared distance measuring sensor, as long as it can provide a stop signal to the linear reciprocating mechanism 3 when the contact portion 21 of the probe 2 contacts the connecting solder joint 41 .

[0040] Continue to refer to Figure 1 , Figure 5 and Figure 6 As shown, the EOL test device also includes a circuit board fixing structure 6, which includes a fixed base 61, a limit block 62 and a suction cup assembly 63; the limit block 62 and the suction cup assembly 63 are both arranged on the fixed base 61, the limit block 62 cooperates with the circumferential limit of the circuit board 4, and the suction cup assembly 63 is adsorbed and fixed to the front side of the circuit board 4; it should be noted that the circuit board fixing structure 6 can also fix the circuit board 4 by bonding, bolting, etc., and the suction cup assembly 63 can make it more convenient to load and unload the circuit board 4; through the arrangement of the circuit board fixing structure 6, the circuit board 4 can be fixed to ensure that the circuit board 4 will not deviate during the test.

[0041] In some embodiments, there are multiple limit blocks 62, and multiple limit blocks 62 are arranged on the peripheral side of the circuit board 4 to form a limit groove. It should be understood that the limit groove can form a limit for two adjacent side edges of the circuit board 4 to limit an angle of the circuit board 4. The limit groove can also form a limit for three side edges of the circuit board 4. The circuit board 4 can slide in the limit groove. The circuit board fixing structure 6 also includes a clamping member 64, and the clamping member 64 is arranged on the fixed base 61 for translation along the direction approaching or away from the limit groove. The movable end of the clamping member 64 is provided with an abutment portion 641 that contacts and cooperates with the circuit board 4; in some embodiments, the clamping member 64 can be an elbow clamp or a sliding structure arranged relative to the limit block 62, as long as the circuit board 4 can be pressed against the limit block 62 by the abutment portion 641 to form a limit for the circuit board 4.

[0042] Continue to refer to Figure 1 and Figure 2 As shown, the linear reciprocating mechanism 3 includes a motor 31, a crank 32, a connecting rod 33 and a slider 34; the motor 31 is arranged on the base 1, the crank 32 is connected to the output shaft of the motor 31, the probe 2 is arranged on the slider 34, and the slider 34 is slidably arranged on the base 1 in the direction of approaching or moving away from the circuit board 4, wherein a slide rail that slidably cooperates with the slider 34 can be arranged on the base 1, thereby improving the stability of the slider 34 sliding on the base 1, one end of the connecting rod 33 is rotatably connected to the crank 32, and the other end is rotatably connected to the slider 34; the motor 31 rotates When the motor 31 is turned, the crank 32 is driven to rotate, and the crank 32 drives one end of the connecting rod 33 to rotate around the output shaft of the motor 31, and the other end of the connecting rod 33 pushes the slider 34 to reciprocate on the base 1; it should be noted that the linear reciprocating mechanism 3 can also be an electric cylinder, a hydraulic cylinder, a gear rack mechanism or other mechanisms that can drive the probe 2 to achieve linear reciprocating motion; wherein, the motor 31 can be electrically connected to the sensor assembly 5, and when the sensor assembly 5 detects that the probe 2 has moved into place, the motor 31 can stop immediately, thereby further protecting the probe 2 and the circuit board 4.

[0043] The specific implementation method and implementation principle are the same as those in the above embodiment, and can bring the same or similar technical effects, which will not be described one by one here. For details, please refer to the description of the above EOL test device embodiment.

[0044] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An EOL test device, comprising a base, a probe, a linear reciprocating mechanism and a test circuit, wherein the linear reciprocating mechanism is mounted on the base, the probe is electrically connected to the test circuit, and the probe is arranged at the active end of the linear reciprocating mechanism, characterized in that: The extended end of the probe is arranged facing the connection solder joint on the back of the circuit board, and a contact portion is provided at the extended end of the probe, and the contact portion is plugged and matched with the connection solder joint to achieve electrical connection; The linear reciprocating mechanism drives the contact portion to be plugged into or separated from the connection welding point.

2. The EOL testing device according to claim 1, characterized in that: A contact groove is formed on the contact portion, and the contact groove is matched with the connection welding point in a concave-convex manner.

3. The EOL testing device according to claim 2, characterized in that: The peripheral side of the contact groove is provided with a chamfer to form an open structure.

4. The EOL testing device according to claim 1, characterized in that: The probe also includes a probe tube. A sliding rod is provided on the contact portion. The probe tube is sleeved on the sliding rod and slidably cooperates with the sliding rod. The probe tube is installed at the movable end of the linear reciprocating mechanism.

5. The EOL testing device according to claim 4, characterized in that: The inner wall of the probe tube is made of conductive material, the outer wall of the probe tube is covered with insulating material, and the sliding rod is electrically connected to the inner wall of the probe tube.

6. The EOL testing device according to claim 4, characterized in that: The probe also includes a wire and a spring body, the wire and the sliding rod are respectively arranged at two ends of the probe tube, the spring body is arranged inside the probe tube along the extension direction of the probe tube, one end of the spring body is connected to the sliding rod, and the other end is connected to the wire; the spring body provides elastic force along the sliding direction of the sliding rod.

7. The EOL testing device according to claim 1, characterized in that: It also includes a sensor assembly, which is arranged between the probe and the connection welding point and is used to detect the plug-in relationship between the probe and the connection welding point.

8. The EOL testing device according to claim 1, characterized in that: It also includes a circuit board fixing structure, which includes a fixing base, a limiting block and a suction cup assembly; The limiting block and the suction cup assembly are both arranged on the fixed base, the limiting block cooperates with the circumferential limiting function of the circuit board, and the suction cup assembly is fixed by adsorption to the front side of the circuit board.

9. The EOL testing device according to claim 8, characterized in that: There are multiple limit blocks, which are arranged on the peripheral side of the circuit board to form a limit groove. The circuit board fixing structure also includes a clamping piece, which is arranged on the fixed base for translation along a direction approaching or away from the limit groove. The movable end of the clamping piece is provided with an abutment portion that contacts and cooperates with the circuit board.

10. The EOL testing device according to any one of claims 1 to 9, characterized in that: The linear reciprocating mechanism comprises a motor, a crank, a connecting rod and a slider; The motor is arranged on the base, the crank is connected to the output shaft of the motor, the probe is arranged on the slider, and the slider is slidably arranged on the base in a direction approaching or moving away from the circuit board. One end of the connecting rod is rotatably connected to the crank, and the other end is rotatably connected to the slider.

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