Self-adaptive test frame of PCBA (Printed Circuit Board Assembly)

Abstract

The utility model discloses a PCBA self-adaptive test frame. The PCBA self-adaptive test frame comprises a base; the pressing piece can move vertically; the limiting carrier plate is arranged on the base, is located below the pressing piece and comprises uniformly distributed probe through holes and a first number of movable limiting pieces, the probe through holes allow the telescopic probes to penetrate out of the base, the telescopic probes are used for making contact with test points of the PCBA to be tested, and the movable limiting pieces are used for being matched with the boundary dimension of the PCBA to be tested to conduct horizontal position limiting; the adjustable pressing plate is connected with the pressing piece, is arranged above the limiting carrier plate and comprises a second number of movable pressing pieces, and the movable pressing pieces are used for pressing the preset position of the PCBA to be tested to limit the vertical position; and the probe module is arranged in the base, comprises telescopic probes which are uniformly distributed, and is used for controlling the corresponding telescopic probes to perform probe contact with the test points of the PCBA to be tested according to the information of the PCBA to be tested. According to the application, the development cost of different PCBA test tools can be reduced, the replacement time of the test tools can be reduced, and the test efficiency can be improved.

Description

Technical Field

[0001] This application relates to the field of circuit board testing technology, and specifically to an adaptive test fixture for PCBA. Background Technology

[0002] In the process of testing existing PCBA (Printed Circuit Board Assembly) after production, it is generally necessary to develop a dedicated test fixture. This means that the carrier board in the test fixture needs to be able to effectively support the PCBA with a specific shape, ensure that the pressing points of the pressure plate are pressed into the reserved positions or positions without components on the PCBA, and also need to design a specific structure to probe the PCBA test points, thereby constructing the interface for testing.

[0003] Therefore, existing PCBA testing requires the development of a dedicated test fixture that matches it, which has a high development cost. Furthermore, when multiple PCBA models need to be tested on the production line, the process of changing to a dedicated test fixture will greatly affect the testing efficiency. Utility Model Content

[0004] In view of this, this application provides an adaptive test fixture for PCBAs, which reduces the cost of developing test fixtures for different PCBAs and also reduces the time required to change test fixtures when switching PCBA production lines, thereby improving testing efficiency. The technical solution of this application is as follows:

[0005] This application provides an adaptive test fixture for PCBA, comprising: a base; a vertically movable pressing member; a limiting carrier plate disposed on the base and below the pressing member, including uniformly distributed probe through holes and a first number of movable limiting members, wherein the probe through holes allow telescopic probes to pass through the interior of the base, the telescopic probes are used to contact test points of the PCBA under test, and the movable limiting members are used to limit the horizontal position according to the external dimensions of the PCBA under test; an adjustable pressure plate connected to the pressing member and disposed above the limiting carrier plate, including a second number of movable pressure members, the movable pressure members being used to press the PCBA under test at a preset position to limit the vertical position; and a probe module disposed within the base, including uniformly distributed telescopic probes, used to control the corresponding telescopic probes to contact the test points of the PCBA under test according to the information of the PCBA under test.

[0006] In one embodiment of this application, the limiting carrier plate includes at least one first guide groove and at least one second guide groove, and each guide groove is provided with two of the movable limiting members.

[0007] In one embodiment of this application, the first guide groove and the second guide groove are orthogonal.

[0008] In one embodiment of this application, the movable limiting member includes a positioning bolt and a sliding baffle.

[0009] In one embodiment of this application, the adjustable pressure plate includes at least one third guide groove and at least one fourth guide groove, wherein the third guide groove and the fourth guide groove intersect and communicate with each other.

[0010] In one embodiment of this application, the third guide groove is orthogonal to the fourth guide groove.

[0011] In one embodiment of this application, the adjustable pressure plate includes a planar spiral fifth guide groove, the fifth guide groove including a beginning end and an end end; the beginning end is located at the center of the adjustable pressure plate, and the end end penetrates through the edge of the adjustable pressure plate; the fifth guide groove spirals horizontally from the beginning end to the end end.

[0012] In one embodiment of this application, the adjustable pressure plate includes at least three movable pressure members disposed in the guide groove.

[0013] In one embodiment of this application, the movable pressure member is a pressure bar.

[0014] In one embodiment of this application, the telescopic probe includes a pneumatic probe.

[0015] This application enables the adaptive test fixture to be applicable to PCBAs with different external dimensions, component distributions, and test point distributions by setting a limiting carrier plate with movable limiting components, an adjustable pressure plate with movable pressure components, and a probe module with uniformly distributed telescopic probes in the adaptive test fixture. This reduces the cost of developing test fixtures for different PCBAs and also reduces the time for changing test fixtures when switching PCBA production lines, thereby improving testing efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an adaptive test fixture for a PCBA provided in an embodiment of this application.

[0017] Figure 2 This is a schematic block diagram of a limiting carrier plate provided in an embodiment of this application.

[0018] Figure 3 This is a schematic block diagram of an adjustable pressure plate provided in an embodiment of this application.

[0019] Figure 4 This is a schematic block diagram of the second type of adjustable pressure plate provided in the embodiments of this application. Detailed Implementation

[0020] It should be noted that in the embodiments of this application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone, where A and B can be singular or plural. The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and drawings of this application are used to distinguish similar objects, not to describe a specific order or sequence.

[0021] It should also be noted that the methods disclosed in the embodiments of this application or the methods shown in the flowcharts include one or more steps for implementing the method. Without departing from the scope of the claims, the execution order of multiple steps can be interchanged, and some steps can also be deleted.

[0022] In the process of testing existing PCBA (Printed Circuit Board Assembly) after production, it is generally necessary to develop a dedicated test fixture. This means that the carrier board in the test fixture needs to be able to effectively support the PCBA with a specific shape, ensure that the pressing points of the pressure plate are pressed into the reserved positions or positions without components on the PCBA, and also need to design a specific structure to probe the PCBA test points, thereby constructing the interface for testing.

[0023] Therefore, existing PCBA testing requires the development of a dedicated test fixture that matches it, which has a high development cost. Furthermore, when multiple PCBA models need to be tested on the production line, the process of changing to a dedicated test fixture will greatly affect the testing efficiency.

[0024] This application provides an adaptive test fixture for PCBA, which reduces the cost of developing test fixtures for different PCBAs and also reduces the time for changing test fixtures when facing PCBA production line switching, thereby improving testing efficiency.

[0025] Please refer to Figure 1 , Figure 1 This is a schematic diagram of an adaptive test fixture for a PCBA provided in an embodiment of this application. The adaptive test fixture 100 includes a base 110, a pressing member 120, a limiting carrier plate 130, an adjustable pressure plate 140, and a probe module 150.

[0026] In this embodiment, the pressing member 120 can move vertically to provide pressing force for fixing the PCBA under test. When using the adaptive test fixture 100, the user can operate the pressing member 120 to move downward, so that the base 110, the limiting carrier plate 130, the PCBA under test, the adjustable pressure plate 140 and the pressing member 120 are stacked and contact each other, thereby vertically fixing the PCBA under test.

[0027] The limiting carrier plate 130 is disposed on the base 110 and below the pressing member 120. It includes evenly distributed probe through holes and a first number of movable limiting members. The probe through holes allow telescopic probes to pass through the interior of the base 110. The telescopic probes are used to contact the test points of the PCBA under test. The movable limiting members are used to limit the horizontal position in accordance with the external dimensions of the PCBA under test.

[0028] For example, the limiting carrier 130 can be provided with four movable limiting members, which correspond to the four sides of the PCBA under test. The tester moves the four movable limiting members to make the PCBA under test fit with the limiting carrier 130. The four movable limiting members then abut against the four sides of the PCBA under test. Finally, the movable limiting members are fixed to limit the horizontal position of the PCBA under test.

[0029] The adjustable pressure plate 140 is connected to the pressing member 120 and is disposed above the limiting carrier plate 130. It includes a second number of movable pressing members 143, which are used to press the preset position of the PCBA under test to limit its vertical position.

[0030] For example, the adjustable pressure plate 140 can be equipped with three or more movable pressure members 143, ensuring that the pressing points of the three movable pressure members 143 are not on a straight line, but rather form a surface, thereby better pressing the PCBA under test vertically. Testers can move the movable pressure members 143 to change the large pressing point on the PCBA under test, avoiding pressing on critical components and thus preventing damage to the PCBA during testing.

[0031] In some embodiments, the height of the pressing member 120 can be adjusted to accommodate the uneven surface of the PCBA under test, so as to better define the vertical position of the PCBA under test.

[0032] The probe module 150 is disposed within the base 110 and includes uniformly distributed telescopic probes, which are used to control the corresponding telescopic probes to contact the test points of the PCBA under test according to the information of the PCBA under test.

[0033] In this embodiment, the probe module 150 may be provided with a plurality of telescopic probes, the number of which may be consistent with the number of probe through holes of the limiting carrier board 130, that is, each probe through hole corresponds to one telescopic probe, so that the adaptive test fixture 100 can be applied to various PCBAs.

[0034] In some embodiments, the probe module 150 includes a control unit connected to each telescopic probe and to a host computer. After receiving information about the PCBA under test from the host computer, the control unit can control the corresponding telescopic probe to extend, causing it to contact all test points of the PCBA under test, thus forming a test interface. This allows the host computer to perform subsequent testing procedures based on the test interface. The telescopic probes may include pneumatic probes.

[0035] It is understood that this application, by setting a limiting carrier plate with movable limiting components, an adjustable pressure plate with movable pressure components, and a probe module with uniformly distributed telescopic probes in the adaptive test fixture, enables the adaptive test fixture to be applicable to PCBAs under test with different external dimensions, component distributions, and test point distributions. This reduces the cost of developing test fixtures for different PCBAs and also reduces the time for changing test fixtures when switching PCBA production lines, thereby improving testing efficiency.

[0036] Please refer to Figure 2 , Figure 2 This is a schematic block diagram of a limiting carrier plate 130 provided in an embodiment of this application. The limiting carrier plate 130 includes at least one first guide groove 131 and at least one second guide groove 132. Figure 2 (Each example is one), each guide groove is provided with two of the movable limiting members 133.

[0037] In this embodiment, the first guide groove 131 and the second guide groove 132 are orthogonal. Let the first guide groove 131 correspond to the X-axis and the second guide groove 132 correspond to the Y-axis. By moving the two movable limiting members 133 on the X-axis until they finally contact and fix with the two edges of the PCBA under test, the PCBA under test can be limited in the X-axis direction. Similarly, by moving the two movable limiting members 133 on the Y-axis until they finally contact and fix with the other two edges of the PCBA under test, the PCBA under test can be limited in the Y-axis direction.

[0038] In some embodiments, the two movable limiting members 133 in the first guide groove 131 and the two movable limiting members 133 in the second guide groove are synchronously linked, that is, the two synchronously linked movable limiting members 133 move in opposite directions but at the same distance, which can ensure that the PCBA under test is finally fixed in the center of the limiting carrier board 130. For example, Figure 2 The distance the two movable limiters 133 on the X-axis move The distance that the two movable limiters 133 on the Y-axis move. .

[0039] In addition, the two synchronously linked movable limiting members 133 can also be provided with a contraction elastic force by setting an elastic band. When the PCBA under test is not supported, the two synchronously linked movable limiting members 133 are located in the center of the limiting carrier plate 130. After the PCBA under test is supported, it can be fixed by the contraction elastic force.

[0040] In some embodiments, the movable limiting member 133 may include a positioning bolt and a sliding baffle. Since the first guide groove 131 and the second guide groove 132 may also be designed to pass through the edge of the limiting carrier plate 130, the tester can replace different types of movable limiting members 133 to cope with PCBAs with different edge structures.

[0041] Please refer to Figure 3 , Figure 3 This is a schematic block diagram of an adjustable pressure plate 140 provided in an embodiment of this application. The adjustable pressure plate 140 includes at least one third guide groove 141 and at least one fourth guide groove 142, wherein the third guide groove 141 and the fourth guide groove 142 intersect and communicate with each other.

[0042] In this embodiment, the third guide groove 141 is orthogonal to the fourth guide groove 142. The interconnected design of the guide grooves allows the movable pressure member 143 to be moved to any position within any guide groove and then fixed to press against a preset position on the PCBA under test. This preset position can be a reserved location in the design of the PCBA specifically for pressing during testing, or it can be a position on the PCBA without any components. The end of the movable pressure member 143 that contacts the PCBA under test can be made of a soft material to protect the PCBA.

[0043] For example, Figure 3 The adjustable pressure plate 140 can be equipped with a third guide groove 141 and three fourth guide grooves 142. It is easy to understand that by setting more interconnected guide grooves on the adjustable pressure plate 140, the movable pressure component 143 can be pressed at more positions, making it more adaptable to different PCBA models.

[0044] In some embodiments, the third guide groove 141 and the fourth guide groove 142 are also designed to pass through the edge of the adjustable pressure plate 140, allowing testers to replace different types of movable pressure members 143 and increase or decrease the number of movable pressure members 143.

[0045] Please refer to Figure 4 , Figure 4 This is a schematic block diagram of a second adjustable pressure plate 140 provided in an embodiment of this application. The adjustable pressure plate 140 includes a planar spiral fifth guide groove 144, which has a beginning and an end.

[0046] In this embodiment, the starting end is located at the center of the adjustable pressure plate 140, and the ending end extends through the edge of the adjustable pressure plate 140. The fifth guide groove 144 spirals horizontally from the starting end to the ending end. Through the spiral design of the five guide grooves 144, the range of pressing positions of the movable pressure member 143 can be further increased, thereby expanding the test fixture's adaptability to more PCBA models.

[0047] The adjustable pressure plate 140 in any embodiment of this application includes at least three movable pressure members disposed in the guide groove. In some embodiments, the movable pressure members are pressure bars, the end of the pressure bar that contacts the PCBA under test is a flexible structure, and the length of the pressure bar is adjustable to accommodate PCBAs with uneven surfaces.

[0048] The embodiments described above are merely preferred embodiments of this application and are not intended to limit the scope of this application. Any modifications and improvements made by those skilled in the art to the technical solutions of this application without departing from the spirit of this application should fall within the protection scope defined by the claims of this application.

Claims

1. An adaptive test rack for PCBA, characterized in that, The utility model relates to a PCBA test device, including: a base; a vertically movable pressing piece; a limiting carrier plate arranged on the base below the pressing piece, including uniformly distributed probe through holes and a first number of movable limiting pieces, the probe through holes are used for the telescopic probe to pass out from the inside of the base, the telescopic probe is used for contacting the test point of the PCBA to be measured, and the movable limiting piece is used for cooperating with the shape size of the PCBA to be measured to limit the horizontal position; an adjustable pressing plate connected with the pressing piece and arranged above the limiting carrier plate, including a second number of movable pressing pieces, the movable pressing piece is used for pressing the preset position of the PCBA to be measured to limit the vertical position; a probe module arranged in the base, including the uniformly distributed telescopic probe, is used for controlling the corresponding telescopic probe and the test point of the PCBA to be measured according to the information of the PCBA to be measured.

2. The self-adapting test rack of claim 1, wherein, The limiting carrier plate includes at least one first guide groove and at least one second guide groove, each guide groove is provided with two movable limiting pieces.

3. The self-adapting test rack of claim 2, wherein, The first guide groove and the second guide groove are orthogonal.

4. The self-adapting test rack of claim 2, wherein, The movable limiting piece includes a positioning bolt and a sliding baffle.

5. The self-adapting test rack of claim 1, wherein, The adjustable pressing plate includes at least one third guide groove and at least one fourth guide groove, the third guide groove and the fourth guide groove intersect and communicate.

6. The self-adapting test rig of claim 5, wherein, The third guide groove and the fourth guide groove are orthogonal.

7. The self-adapting test rig of claim 1, wherein, The adjustable pressing plate includes a planar spiral fifth guide groove, the fifth guide groove includes a starting end and an end; The starting end is located at the center of the adjustable pressing plate, and the end penetrates the edge of the adjustable pressing plate; the fifth guide groove spirals to the end horizontally with the starting end as the center.

8. The self-adapting test rack of any of claims 5 to 6, wherein, The adjustable pressing plate includes at least three movable pressing pieces arranged in the guide groove.

9. The self-adapting test rig of claim 8, wherein, The movable pressing piece is a pressing rod.

10. The self-adapting test rack of claim 1, wherein, The telescopic probe includes a pneumatic probe.

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