PCBA electronic component signal transfer testing device

Abstract

The invention relates to the technical field of PCBA, and particularly discloses a PCBA electronic component signal transfer testing device which comprises a plate frame support, a guide groove is formed in the plate frame support, a loading strip is installed in the guide groove, assembling bases are evenly distributed on the loading strip, and a probe unit is installed in each assembling base. An adjusting device is arranged on the plate frame bracket at the end part of the loading strip and is used for adjusting the position of the loading strip in the guide groove; the probe unit comprises an installation seat installed on the assembly seat, the installation seat is rotatably connected with the assembly seat, the bottom of the installation seat is provided with a contact main body, and the part, located below the installation seat, of the contact main body is obliquely arranged relative to the axial direction of the installation seat. And the driving part is used for driving the mounting seat to circumferentially rotate in the assembling seat. According to the invention, through position adjustment of the loading strip in the guide groove and cooperation between the probe units capable of performing circumferential rotation, a rapid remodeling capability can be obtained so as to cover different plate types.

Description

Technical Field

[0001] The present invention relates to the technical field of PCBA performance detection, and particularly relates to a PCBA electronic component signal transfer test device. Background Art

[0002] In the manufacturing process of PCBA (Printed Circuit Board Assembly), performance testing is a key link to ensure product quality and functional reliability. Currently, the mainstream testing methods in the industry mainly include In-Circuit Test (ICT) and Flying Probe Test, both of which have their own technical characteristics but also have significant limitations.

[0003] The existing ICT test contacts the test points on the PCBA through a customized test fixture, and uses high-density probes to achieve multi-node parallel testing, which has the advantages of fast speed and high throughput, and is especially suitable for large-scale mass production scenarios. However, its core problem lies in the high dependence on special test fixtures. Each PCBA needs to design a matching fixture structure, resulting in a long fixture development cycle and high costs. In addition, the physical size and probe layout of the fixture are fixed and cannot adapt to PCBA with different sizes or test point distributions. This makes the economic efficiency of ICT testing significantly reduced in small-batch and multi-variety production modes, and it is difficult to meet the development needs of rapidly iterating electronic products. The flying probe test uses programmable moving probes to replace fixed fixtures, and drives the probes to contact the test targets point by point through a robotic arm, which has the characteristics of not requiring customized fixtures and high flexibility, and is suitable for small batches or the R & D verification stage. However, its test efficiency is limited by the serial movement mechanism of the probes. It takes several minutes to dozens of minutes to complete the single-board test, and the efficiency is only 1 / 10 or even lower than that of ICT. Therefore, the current PCBA electronic component test technology shows a relatively obvious polarization: ICT is suitable for mass production but lacks flexibility, while the flying probe test is flexible but inefficient.

[0004] Therefore, there is a problem in the existing test technology that in the mass production of PCBA in fields such as industrial control, it is necessary to have a test speed close to that of ICT and also require the ability to quickly change models to cover different board types. Summary of the Invention

[0005] The purpose of the present invention is to provide a PCBA electronic component signal transfer test device to solve the technical problem in the existing technology that in the mass production of PCBA in fields such as industrial control, it is impossible to obtain a test speed close to that of ICT and also require the ability to quickly change models to cover different board types.

[0006] To solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A PCBA electronic component signal transfer and test device, including a frame bracket, guide grooves are equidistantly arranged on the frame bracket, a loading bar is installed in the guide grooves, assembly seats are uniformly distributed along the length direction of the loading bar on the loading bar, and probe units are installed in each of the assembly seats;

[0008] An adjusting device is arranged on the frame bracket at the end of the loading bar, and the adjusting device is used to adjust the position of the loading bar in the guide grooves;

[0009] The probe unit includes a mounting seat installed in the assembly seat, and the mounting seat is rotatably connected to the assembly seat. A contact body is arranged at the bottom of the mounting seat, and the part of the contact body located below the mounting seat is inclined relative to the axis of the mounting seat. A driving part is arranged at the upper part of the mounting seat, and the driving part is used to drive the mounting seat to rotate circumferentially in the assembly seat.

[0010] As a preferred scheme of the present invention, the contact body includes two fixed sections arranged in the mounting seat, the end of the fixed section located outside the mounting seat is connected with a horizontal section, and the end of the horizontal section far from the fixed section is connected with an inclined section;

[0011] The ends of the two inclined sections far from the horizontal section are connected together.

[0012] As a preferred scheme of the present invention, a pull rod is arranged in the middle of the mounting seat, one end of the pull rod extends out of the top of the mounting seat and is connected to the driving part, and the other end of the pull rod is connected to the end where the two inclined sections are connected;

[0013] The driving part drives the top of the pull rod to move upward along the axis of the mounting seat, so that the end where the two inclined sections are connected approaches the axis of the mounting seat.

[0014] As a preferred scheme of the present invention, the driving part includes a guide sleeve installed on the assembly seat and a servo motor installed at the top of the guide sleeve. The output end of the servo motor is connected with a first transmission part, and a second transmission part is arranged on the mounting seat. The first transmission part and the second transmission part form a transmission pair, and the transmission pair is used to convert the linear motion of the first transmission part approaching and contacting the second transmission part into the circumferential rotation of the second transmission part, so as to drive the mounting seat to rotate.

[0015] As a preferred scheme of the present invention, the first transmission part includes a transmission sleeve, and the top of the transmission sleeve is installed on the lead screw connected to the output end of the servo motor through a nut pair;

[0016] A cut-off cavity is provided at the inner top of the transmission sleeve. A guiding cavity is provided in the transmission sleeve below the cut-off cavity, and the diameter of the cut-off cavity is greater than that of the guiding cavity. A step is provided between the cut-off cavity and the guiding cavity.

[0017] The top of the pulling rod enters the cut-off cavity from the guiding cavity, and a terminal matching with the step is provided at the top of the pulling rod.

[0018] As a preferred solution of the present invention, the second transmission member includes a matching sleeve. A spiral groove is provided on the outer wall surface of the matching sleeve, and a protrusion matching with the spiral groove is provided on the inner wall of the transmission sleeve.

[0019] As a preferred solution of the present invention, the adjusting device includes an adjusting screw provided at one end of the loading bar. The adjusting screw is threadedly connected to the side wall of the plate frame bracket, and a spring member is provided at the other end of the loading bar.

[0020] As a preferred solution of the present invention, the loading bar includes two right-angle guide rods arranged in parallel, and the right angles of the two right-angle guide rods face each other directly. A gap is provided between the two right-angle guide rods.

[0021] The assembly seat is provided on the bottom edges of the two right-angle guide rods.

[0022] As a preferred solution of the present invention, a silica gel sleeve is sleeved on the fixed section, and the silica gel sleeve extends out of the bottom of the mounting seat.

[0023] The present invention has the following beneficial effects compared with the prior art:

[0024] Based on the optimization of the structure of the probe of the probe unit of ICT, the present invention obtains the ability of rapid tool change to cover different board types through the position adjustment of the loading bar in the guide groove and the cooperation between the probe units capable of circumferential rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained according to the provided drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0027] Figure 2 It is a partial structural schematic diagram of the loading bar of an embodiment of the present invention;

[0028] Figure 3 This is a schematic structural diagram of the probe unit according to an embodiment of the present invention.

[0029] The reference numerals in the figure are respectively represented as follows:

[0030] 1 - Frame support; 2 - Guide groove; 3 - Loading strip; 31 - Right-angle guide rod; 4 - Assembly seat; 5 - Probe unit; 51 - Mounting seat; 52 - Contact body; 521 - Fixed section; 522 - Horizontal section; 523 - Inclined section; 53 - Driving part; 531 - Guide sleeve; 532 - Servo motor; 533 - Transmission sleeve; 534 - Cut-off cavity; 535 - Guide cavity; 536 - Step; 537 - Terminal; 538 - Fitting sleeve; 539 - Spiral groove; 6 - Adjusting device; 61 - Adjusting screw; 62 - Spring member; 7 - Pull rod. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] As Figure 1 、 Figure 2 and Figure 3 shown, the present invention provides a PCBA electronic component signal transfer and test device, including a frame support 1. Guide grooves 2 are equidistantly arranged on the frame support 1. A loading strip 3 is installed in the guide grooves 2. Assembly seats 4 are evenly distributed along the length direction of the loading strip 3 on the loading strip 3. A probe unit 5 is installed in each assembly seat 4.

[0033] An adjusting device 6 is arranged on the frame support 1 at the end of the loading strip 3. The adjusting device 6 is used to adjust the position of the loading strip 3 in the guide grooves 2.

[0034] The probe unit 5 includes a mounting seat 51 installed in the assembly seat 4, and the mounting seat 51 is rotatably connected to the assembly seat 4. A contact body 52 is arranged at the bottom of the mounting seat 51. The part of the contact body 52 located below the mounting seat 51 is axially inclined relative to the mounting seat 51. A driving part 53 is arranged on the upper part of the mounting seat 51. The driving part 53 is used to drive the mounting seat 51 to rotate circumferentially in the assembly seat 4.

[0035] This embodiment is based on the design of the structure of the probe unit in the ICT test, enabling the array of the probe unit to be adjustable. Specifically, it is reflected in that the loading bar 3 can be adjusted along the length direction of the loading bar 3, and correspondingly, it can be adapted to the contact positions of electronic components on different PCBAs. However, when considering the situation where multiple contacts need to be arranged at equal intervals (relative to the length direction of the loading bar 3), if the probes of the probe unit, that is, the structures of the end contact contacts, are vertically downward perpendicular to the mounting base 51, it is restricted by the range of the assembly structure of the probe unit. Then, the distance between the probes between adjacent two mounting seats 4 will affect the adaptation of the electronic component contacts, especially in the case where there are multiple contacts with small intervals on the same straight line, such as the pins of a CPU or other chips.

[0036] After the displacement of the loading bar 3, the superposition of the distances between the probes of multiple probe units 5 cannot meet the above requirements. For this reason, the probe unit in this embodiment is set to be rotatable, so that the probes of multiple probe units 5 can be brought closer to each other at equal intervals by rotating to solve the above problems.

[0037] For this reason, this embodiment provides a specific embodiment of the contact body 52:

[0038] It includes two fixed segments 521 arranged in the mounting base 51. The end of the fixed segment 521 located outside the mounting base 51 is connected with a horizontal segment 522, and the end of the horizontal segment 522 far from the fixed segment 521 is connected with an inclined segment 523.

[0039] The ends of the two inclined segments 523 far from the horizontal segment 522 are connected together, and the two inclined segments 523 are connected to form a V-shaped structure. Here, the inclined segment 523 refers to the deviation of the inclined segment 523 relative to the vertical direction.

[0040] Although the rotation setting of the inclined segment 523 and the mounting base 51 can solve the above problems, the setting of the inclined segment 523 will cause a circular "vacuum area" to be formed at the end of the contact contact of the inclined segment 523. This "vacuum area" refers to the area drawn by the end of the circumferential rotation of the inclined segment 523 during the rotation of the mounting base 51. The radius of this "vacuum area" is the projection distance of the inclined segment 523 on the horizontal plane. This "vacuum area" needs to be adjusted by the lateral displacement and longitudinal displacement of the mounting base 51 (referring to within the plane of the plate frame bracket 1).

[0041] Therefore, to solve the above problems, in this embodiment, a pull rod 7 is arranged in the middle of the mounting base 51. One end of the pull rod 7 extends out of the top of the mounting base 51 and is connected to the driving part 53, and the other end of the pull rod 7 is connected to the end where the two inclined segments 523 are connected.

[0042] That is, by actively bending the inclined section 523, the contact position of the inclined section 523 is changed. Without rotating the mounting base 51, the driving part 53 drives the top of the pull rod 7 to move upward along the axial direction of the mounting base 51, so that the end parts where the two inclined sections 523 are connected approach the axis of the mounting base 51.

[0043] Furthermore, in this embodiment, the pull rod 7 can be made of the same material as the inclined section 523 or be part of a probe that contacts the contacts of the electronic components.

[0044] Of course, in this embodiment, the displacement of the mounting base 51 and the circumferential rotation of the mounting base 51 are involved. Of course, the vertical displacement of the pull rod 7 is also involved. Then, in terms of the driving method, if multiple independent driving modules are used, the driving module part will occupy a relatively large structural volume. Obviously, if the driving module increases the volume of the device, the number of mounting bases 51 on the loading bar 3 will decrease, and further, the number of contacts for synchronously detecting the PCBA electronic components will decrease.

[0045] Therefore, in this embodiment, a highly integrated driving part 53 is provided, which can realize the circumferential rotation of the mounting base 51 and the vertical displacement of the pull rod 7 through the stroke of one driving part 53.

[0046] The driving part 53 includes a guide sleeve 531 installed on the assembly seat 4 and a servo motor 532 installed on the top of the guide sleeve 531. The output end of the servo motor 532 is connected with a first transmission part, and a second transmission part is arranged on the mounting base 51. The first transmission part and the second transmission part form a transmission pair, and the transmission pair is used to convert the linear motion of the first transmission part approaching and contacting the second transmission part into the circumferential rotation of the second transmission part, thereby driving the mounting base 51 to rotate.

[0047] Specifically, the first transmission part includes a transmission sleeve 533, and the top of the transmission sleeve 533 is installed on the lead screw connected to the output end of the servo motor 532 through a nut pair.

[0048] A cut-off cavity 534 is arranged at the inner top of the transmission sleeve 533, a guide cavity 535 is arranged in the transmission sleeve 533 below the cut-off cavity 534, and the diameter of the cut-off cavity 534 is larger than that of the guide cavity 535. A step 536 is arranged between the cut-off cavity 534 and the guide cavity 535.

[0049] The top of the pull rod 7 enters the cut-off cavity 534 from the guide cavity 535, and a terminal 537 matched with the step 536 is arranged at the top of the pull rod 7.

[0050] The second transmission member includes a mating sleeve 538, and a spiral groove 539 is provided on the outer wall surface of the mating sleeve 538. A protrusion that mates with the spiral groove 539 is provided on the inner wall of the drive sleeve 533.

[0051] That is, when the drive part 53 in this embodiment is specifically working: the servo motor 532 is specifically a micro motor that drives the drive sleeve 533 to axially displace downward along the axis of the drive sleeve 533. Furthermore, a transmission pair is formed between the drive sleeve 533 and the mating sleeve 538, and then the mating sleeve 538 drives the mounting seat 51 to rotate relative to the assembly seat 4.

[0052] When the servo motor 532 drives the drive sleeve 533 axially upward, since the pull rod 7 is fixedly connected to the mounting seat 51 relatively, that is, the pull rod 7 is fixed relative to the drive sleeve 533. When the drive sleeve 533 moves upward, until the terminal 537 contacts and mates with the step 536, during the process of the drive sleeve 533 continuing to move upward, a vertically upward acting force will be applied to the end of the pull rod 7, thereby enabling the pull rod 7 to pull the inclined section 523 and change the position of the contact point of the inclined section 523.

[0053] Of course, for the overall stability of the probe, the position of the pull rod 7 relative to the two inclined sections 523 is located in the middle or on the center line of the two inclined sections 523, that is, the two inclined sections 523 and the pull rod 7 form three edges of a triangular prism.

[0054] Furthermore, the lengths of the cut-off cavity 534, the guide cavity 535, the drive sleeve 533, and the mating sleeve 538 in the vertical direction in this embodiment need to be specifically designed to meet the above drive process.

[0055] Specifically, when the cut-off cavity 534 moves axially downward following the drive sleeve 533, it needs to meet the initial position of the top of the pull rod 7, that is, within the circumferential rotation angle of the mounting seat 51 of the cut-off cavity 534, its top needs to be higher than the top of the pull rod 7.

[0056] The spiral groove 539 needs to meet one full rotation of the mounting seat 51 during the mating process with the drive sleeve 533.

[0057] The adjusting device 6 includes an adjusting screw 61 provided at one end of the loading strip 3. The adjusting screw 61 is threadedly connected to the side wall of the frame bracket 1, and a spring member 62 is provided at the other end of the loading strip 3.

[0058] To more clearly illustrate the working mode of the above loading strip 3, a specific embodiment of the loading strip 3 is provided, including two right-angle guide rods 31 arranged in parallel, and the right angles of the two right-angle guide rods 31 face each other directly, and a gap is provided between the two right-angle guide rods 31.

[0059] In this embodiment, an assembly seat 4 is installed on the bottom edges of the two right-angle guide rods 31. It is necessary to provide a card slot on the bottom edges of the right-angle guide rods 31 that cooperates with the assembly seat 4, that is, the two right-angle guide rods 31 are arranged opposite to each other. As shown in Figure 2 the figure, the right-angle guide rod on one side of the figure is not fully drawn. Specifically, the two right-angle guide rods 31 are two long strip-shaped bodies that are vertically connected.

[0060] Since the end of the inclined section 523 serves as the main body for contacting the solder joint of the electronic component, when adjusting the inclination angles of the two inclined sections 523, it is necessary to avoid the force on the inclined section 523 from affecting the fixed section 521 and the horizontal section 522, which is likely to cause metal fatigue at the connection. Therefore, a silica gel sleeve is sleeved on the fixed section 521, and the silica gel sleeve extends out of the bottom of the mounting seat 51, that is, to avoid the rigid connection of the mounting seat 51 to the fixed section 521. When adjusting the inclination angle of the inclined section 523, the fixed section 521 acts on the silica gel sleeve, and the silica gel sleeve plays an elastic buffering role.

[0061] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions within the essence and protection scope of the present application, and such modifications or equivalent substitutions should also be regarded as falling within the protection scope of the present application.

Claims

1. A PCBA electronic component signal transfer and test device, characterized in that, It includes a frame bracket (1). Guide grooves (2) are equidistantly arranged on the frame bracket (1). A loading bar (3) is installed in the guide grooves (2). Assembly seats (4) are evenly distributed along the length direction of the loading bar (3) on the loading bar (3). A probe unit (5) is installed in each assembly seat (4). An adjusting device (6) is arranged on the frame bracket (1) at the end of the loading bar (3). The adjusting device (6) is used to adjust the position of the loading bar (3) in the guide grooves (2). The probe unit (5) includes a mounting seat (51) installed in the assembly seat (4). The mounting seat (51) is rotatably connected to the assembly seat (4). A contact body (52) is arranged at the bottom of the mounting seat (51). The part of the contact body (52) located below the mounting seat (51) is inclined relative to the axis of the mounting seat (51). A driving part (53) is arranged at the upper part of the mounting seat (51). The driving part (53) is used to drive the mounting seat (51) to rotate circumferentially in the assembly seat (4).

2. A PCBA electronic component signal transfer test device according to claim 1, characterized in that The contact body (52) includes two fixed sections (521) arranged in the mounting seat (51). The end of the fixed section (521) located outside the mounting seat (51) is connected with a horizontal section (522). The end of the horizontal section (522) far from the fixed section (521) is connected with an inclined section (523). The ends of the two inclined sections (523) far from the horizontal section (522) are connected together.

3. A PCBA electronic component signal transfer test device according to claim 2, characterized in that A pull rod (7) is arranged in the middle of the mounting seat (51). One end of the pull rod (7) extends out of the top of the mounting seat (51) and is connected to the driving part (53). The other end of the pull rod (7) is connected to the end where the two inclined sections (523) are connected. By driving the top of the pull rod (7) to move upward along the axis of the mounting seat (51), the driving part (53) makes the end where the two inclined sections (523) are connected close to the axis of the mounting seat (51).

4. A PCBA electronic component signal transfer test device according to claim 1, characterized in that The driving part (53) includes a guide sleeve (531) installed on the assembly seat (4) and a servo motor (532) installed at the top of the guide sleeve (531). The output end of the servo motor (532) is connected with a first transmission part. A second transmission part is arranged on the mounting seat (51). The first transmission part and the second transmission part form a transmission pair. The transmission pair is used to convert the linear motion of the first transmission part close to and contacting the second transmission part into the circumferential rotation of the second transmission part, thereby driving the mounting seat (51) to rotate.

5. A PCBA electronic component signal transfer test device according to claim 4, characterized in that the first transmission member includes a transmission sleeve (533), and the top of the transmission sleeve (533) is mounted on a lead screw connected to the output end of the servo motor (532) through a nut pair; a cut-off cavity (534) is provided at the inner top of the transmission sleeve (533), a guide cavity (535) is provided in the transmission sleeve (533) below the cut-off cavity (534), and the diameter of the cut-off cavity (534) is larger than that of the guide cavity (535), and a step (536) is provided between the cut-off cavity (534) and the guide cavity (535); the top of the pull rod (7) enters the cut-off cavity (534) from the guide cavity (535), and a terminal (537) cooperating with the step (536) is provided at the top of the pull rod (7).

6. A PCBA electronic component signal transfer test device according to claim 4, characterized in that the second transmission member includes a mating sleeve (538), a spiral groove (539) is provided on the outer wall surface of the mating sleeve (538), and a protrusion cooperating with the spiral groove (539) is provided on the inner wall of the transmission sleeve (533).

7. A PCBA electronic component signal transfer test device according to claim 1, characterized in that the adjusting device (6) includes an adjusting screw (61) provided at one end of the loading strip (3), the adjusting screw (61) is threadedly connected to the side wall of the plate frame bracket (1), and a spring member (62) is provided at the other end of the loading strip (3).

8. A PCBA electronic component signal transfer test device according to claim 7, characterized in that the loading strip (3) includes two right-angle guide rods (31) arranged in parallel, and the right angles of the two right-angle guide rods (31) face each other directly, and a gap is provided between the two right-angle guide rods (31); the assembly seat (4) is provided on the bottom edges of the two right-angle guide rods (31).

9. A PCBA electronic component signal transfer test device according to claim 2, characterized in that a silica gel sleeve is sleeved on the fixed section (521), and the silica gel sleeve extends out of the bottom of the mounting seat (51).

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