CN220455460U

CN220455460U - PCBA test fixture

Info

Publication number: CN220455460U
Application number: CN202320989882.3U
Authority: CN
Inventors: 朱佑松; 张通林
Original assignee: Shenzhen Sofarsolar Co Ltd
Current assignee: Shenzhen Sofarsolar Co Ltd
Priority date: 2023-04-19
Filing date: 2023-04-19
Publication date: 2024-02-06
Anticipated expiration: 2033-04-19

Abstract

The embodiment of the utility model relates to the technical field of electronic manufacturing and testing, and discloses a PCBA test fixture which comprises a box body, a test bench, a driving assembly and a ceiling plate; the box body is provided with a cavity; the test bench is fixed at the bottom of the cavity and is provided with a probe; the driving components are arranged at two ends of the test bench and used for driving the sky board to move. Through the mode, the embodiment of the utility model can improve the electrical contact performance of the PCBA board and the probe of the test bench under the pressing of the pressing plate, thereby improving the accuracy of the PCBA test fixture.

Description

PCBA test fixture

Technical Field

The utility model relates to the technical field of electronic manufacturing tests, in particular to a PCBA test fixture.

Background

PCBA (Printed Circuit Board Assembly) refers to printed circuit board (Printed Circuit Board) assemblies. It is an assembly technique that mounts electronic components on the surface of a printed circuit board and then connects the electronic components to other components to form a circuit system. PCBA boards are composed of a PCB (printed Circuit Board) and electronic components (e.g., SMT, DIP, etc.). In order to ensure the factory quality of the PCBA board, after the manufacturing is finished, the PCBA board is required to be loaded on a corresponding test jig to detect whether the circuit of the circuit is normal or not. In the related art, the PCBA test fixture generally adopts a driving mode of a centrally-mounted independent cylinder to drive the pressing plate through the top plate so as to tightly press the PCBA plate on the test bench, and the accuracy of the PCBA test fixture is affected because the acting force actually applied to each part of the pressing plate by the centrally-mounted independent cylinder is uneven, so that the electrical contact performance of the PCBA plate and the probe of the test bench is affected.

Disclosure of Invention

In view of the above problems, an object of the present utility model is to provide a PCBA testing fixture, which can improve the electrical contact performance between the PCBA board and the probes of the test board under the pressing force of the pressing plate, so as to improve the accuracy of the PCBA testing fixture.

The utility model provides a PCBA test fixture which comprises a box body, a test bench, a driving assembly and a ceiling plate, wherein the box body is provided with a plurality of test boards; the box body is provided with a cavity; the test bench is fixed at the bottom of the cavity and is used for bearing a PCBA board to be tested, and the test bench is provided with a probe; the driving components are arranged at two ends of the test bench and used for driving the sky board to move.

Optionally, the driving assembly includes a first driving member and a second driving member, where the first driving member and the second driving member are disposed opposite to opposite ends of the test bench, and the first driving member and the second driving member are electrically connected to the controller of the box body;

the first driving piece and the second driving piece are used for synchronously driving the antenna board to move towards the direction approaching or far away from the test bench;

the PCBA test fixture further comprises a pressing plate, the pressing plate is fixed on the top plate, the pressing plate is provided with a pressing part, and the pressing part is used for pressing the PCBA board to be tested along with the top plate moving towards the direction close to the test bench when the PCBA board to be tested is loaded on the test bench, so that the probe is electrically connected with the PCBA board to be tested.

Optionally, the first driving member and/or the second driving member is a cylinder.

Optionally, the PCBA testing jig further includes a guide assembly, where the guide assembly includes a first guide rod and a second guide rod, the first guide rod and the second guide rod are respectively opposite to two opposite ends of the test bench, and the antenna board is respectively movably connected with the first guide rod and the second guide rod;

the first driving piece and the first guide rod are both positioned on the same side of the test bench, and the second driving piece and the second guide rod are both positioned on the other same side of the test bench.

Optionally, the number of the first guide rods and the number of the second guide rods are two, and the two first guide rods and the two second guide rods are respectively opposite to the periphery of the test bench.

Optionally, the case further includes a window in communication with the chamber;

the PCBA test fixture further comprises a light curtain transmitting sensor and a light curtain receiving sensor which are electrically connected with the controller of the box body, wherein the light curtain transmitting sensor and the light curtain receiving sensor are oppositely arranged in the box body, and the light curtain transmitting sensor transmits infrared rays to form a scanning light curtain capable of covering the window area.

Optionally, the test bench is detachably connected to the bottom of the cavity, and is provided with a positioning hole;

the pressing plate is detachably connected to the top plate, the pressing plate is provided with a positioning column, and the positioning column can be inserted and fixed in the positioning hole.

Optionally, a lock hole is arranged at the bottom of the test bench;

the PCBA test fixture further comprises a lock catch and a third driving piece, the third driving piece is arranged on the box body, the third driving piece is electrically connected with a controller of the box body, the third driving piece can drive the lock catch to move, so that the lock catch can be switched between an unfolding state and a folding state, in the unfolding state, the lock catch can be inserted into the lock hole to lock the relative position of the test board and the box body, and in the folding state, the lock catch can be withdrawn from the lock hole to unlock the relative position of the test board and the box body.

Optionally, the third driving member is a cylinder.

Optionally, the PCBA testing jig further includes a magnetic induction switch, the magnetic induction switch includes a magnetic ring and a magnetic switch, both of which are electrically connected with the controller of the box, the magnetic ring is mounted on the piston of the third driving piece, and the magnetic switch is mounted on the cylinder of the third driving piece.

The embodiment of the utility model has the beneficial effects that: according to the PCBA test fixture provided by the embodiment of the utility model, the original middle independent cylinder layout is adjusted to be the independent cylinder layouts positioned on the two opposite sides of the top plate, and the layout form enables the acting force of each part of the pressing plate driven by the top plate to be dispersed more uniformly, so that the situation of the electrical contact performance of the PCBA plate and the probe of the test bench is improved, and the accuracy of the PCBA test fixture is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

FIG. 1 shows a schematic structure of a PCBA test fixture of the present utility model;

FIG. 2 is a schematic view showing the structure of the PCBA test fixture under another angle;

fig. 3 is a schematic structural view of the PCBA testing jig shown in fig. 1 when the box frame is not assembled.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present utility model, are within the scope of the present utility model.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.

In the description of the present utility model, it should be noted that, orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and these orientation words do not indicate or imply that the apparatus or elements being referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

In the description of the present utility model, it should be noted that, the terms "first," "second," and the like are used for defining the components, and are merely for convenience in distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, so they should not be construed as limiting the scope of the present utility model.

Next, a specific configuration of the PCBA test jig will be described with reference to the accompanying drawings. The embodiments described below and the features of the embodiments may be combined with each other without conflict.

FIG. 1 shows a schematic structure of a PCBA test fixture of the present utility model; FIG. 2 is a schematic view showing the structure of the PCBA test fixture under another angle; FIG. 3 is a schematic view of the PCBA test fixture shown in FIG. 1 when the box frame is not assembled; first, please refer to the examples shown in fig. 1 to 3, the PCBA testing fixture includes: the test bench comprises a box body 10, a test bench 20, a driving assembly 30, a top plate 40 and a pressing plate 50; the box 10 is not only an installation supporting structure of the components, but also a control mechanism of the driving assembly 30; the box body 10 is provided with a cavity, the test bench 20 is detachably connected to the bottom of the cavity, and the test bench 20 is used for bearing a PCBA board to be tested; the guide assembly 60 and the driving assembly 30 are fixedly arranged in the cavity, the driving assembly 30 is electrically connected with the box body 10, the pressing plate 50 is fixedly arranged on the guide assembly 60, the driving assembly 30 is matched with the guide assembly 60, and the driving assembly 30 drives the guide assembly 60 to operate, so that the pressing plate 50 is driven to move towards a direction approaching or far away from the test bench 20.

For the case 10, as shown in fig. 1, in some embodiments of the present utility model, the case 10 includes a case frame 11 and a console 12 fixedly installed at the bottom of the case frame 11. The case frame 11 has a first side wall 111, a second side wall 112, a third side wall 113, and a top wall 114; the first side wall 111, the second side wall 112 and the third side wall 113 are fixedly connected end to end in sequence, and the first side wall 111, the second side wall 112 and the third side wall 113 are fixedly connected with the periphery of the console 12 and the periphery of the top wall 114 respectively, so that the first side wall 111 and the third side wall 113 are oppositely arranged, and the top wall 114 is oppositely arranged with the console 12. With continued reference to fig. 1 and with reference to the example shown in fig. 2, the second side wall 112 includes a first blocking wall 1121 as a part thereof and a second blocking wall 1122 as another part thereof, where the first blocking wall 1121 is fixedly connected to the top wall 114, the first side wall 111 and the third side wall 113, respectively, and the second blocking wall 1122 can be rotatably connected to the first blocking wall 1121 by a rotating member such as, but not limited to, a hinge. After the test board 20 is mounted in the chamber of the box body 10, the second blocking wall 1122 can be opened so that the test board 20 is electrically connected with the external monitoring device, and thus the loop formed by the test board 20, the PCBA board, the external monitoring device and the power supply is conducted.

As further shown in fig. 1, a plurality of function buttons, a power indicator light and a display instrument are arranged on the side wall of the console 12, which is positioned on the same side with the window, and the plurality of function buttons are electrically connected with a controller arranged in the console 12; wherein the plurality of function buttons may include, but are not limited to, two start buttons that start operation of the drive assembly 30 and a scram button that can be stopped at any time while the drive assembly 30 is operating. The display instrument may be an air pressure gauge that displays the air pressure value of the drive assembly 30. The side wall of the console 12, which is positioned on the same side as the second side wall 112, is provided with a plurality of functional interfaces, and the functional interfaces are electrically connected with a controller arranged on the console 12; the plurality of functional interfaces may include, but are not limited to, a USB communication serial port for interfacing with an external detection device, an AC power outlet for electrically interfacing with an external power supply device, and an air line plug for supplying air to the drive assembly 30. Preferably, a fan for dissipating heat from the controller may also be provided within the console 12 to facilitate heat dissipation from the controller when the rate of heat generated by the controller is greater than the rate of heat dissipation from the console 12.

To facilitate movement of the PCBA test fixture to a designated location, further, handles are provided on opposite sides of the console 12, respectively.

For the test bench 20, as shown in fig. 1 to 3, in some embodiments of the present utility model, the test bench 20 is a jig box, the top of the test bench 20 has an insulating table 201 for carrying a PCBA board to be tested and a plurality of probes penetrating out of the insulating table 201 from the inside of the test bench 20, the plurality of probes are electrically connected with an external detection device through a PIN-to-PIN connection manner, and the plurality of probes are respectively used for corresponding to each electrical test hole on the PCBA board to be tested one by one.

As shown in fig. 3, the test bench 20 and the box 10 are connected in a manner that two opposite sides of the test bench 20 respectively protrude in a direction away from the test bench 20 to form two opposite sides 202; the top of the console 12 is provided with a pair of spaced apart rails 121, each rail 121 having an inwardly directed channel along the rail 121 for receiving two opposite sides 202 of the test stand 20. Although the above preferred connection method ensures that the test bench 20 can be stably mounted at a predetermined position during use, it is not excluded that the test bench 20 and the case 10 are fixedly mounted by using other detachable positioning connection methods, for example, positioning fit of protrusions and holes is adopted around the test bench 20 and the case 10, or positioning holes are respectively formed around the test bench 20 and the case 10 and are fixedly mounted by screw connection of threaded fasteners, or positioning fit is realized by using grooves between the test bench 20 and the case 10. Therefore, any arrangement and connection manner that ensures that the test bench 20 can be stably mounted at a predetermined position during use may be used.

For the above-described driving assembly 30 and the ceiling 40, as shown in fig. 3, in some embodiments of the present utility model, the driving assembly 30 includes a first driving member 31 and a second driving member 32; the first driving member 31 and the second driving member 32 are disposed opposite to the opposite ends of the test bench 20, respectively, and the first driving member 31 and the second driving member 32 are electrically connected with the controller of the box 10. The top plate 40 is fixedly connected with the first driving member 31 and the second driving member 32, and the first driving member 31 and the second driving member 32 are used for synchronously driving the top plate 40 to move towards or away from the test bench 20. In the embodiment of the present utility model, the first driving member 31 and the second driving member 32 are both cylinders, and in the embodiment of the present utility model, the cylinder of the first driving member 31 and the cylinder of the second driving member 32 are both fixedly connected to the console 12 of the box 10, and the piston of the first driving member 31 and the piston of the second driving member 32 are both fixed to the ceiling 40. The first driving member 31 and the second driving member 32 are electrically connected with the controller of the case 10 through three-position five-way middle-seal electromagnetic valves, respectively. In addition, the first driving member 31 and the second driving member 32 are both communicated with an external air supply device through an air pipe interface. It is understood that the first driving member 31 and the second driving member 32 may also be driven by a linear driving motor, for example, to drive the ceiling 40. It will be further appreciated that the driving assembly 30 can not only synchronously drive the movement of the ceiling 40 by the first driving member 31 and the second driving member 32, but also drive both sides of the ceiling 40 by the driving source of the independent power source and the transmission case transmission combination, respectively, so that the ceiling 40 can move toward or away from the test bench 20.

In order to guide the top board 40 so that the top board 40 always keeps aligned with the test bench 20 along the movement path thereof, the PCBA test fixture further includes a guide assembly 60, the guide assembly 60 further includes a first guide rod 61 and a second guide rod 62, the first guide rod 61 and the second guide rod 62 are disposed opposite to opposite ends of the test bench 20, and the top board 40 is movably connected with the first guide rod 61 and the second guide rod 62. Specifically, the first driving member 31 and the first guide rod 61 are disposed opposite to the test bench 20, and the first driving member 31 and the first guide rod 61 are disposed on one side of the test bench 20, the second driving member 32 and the second guide rod 62 are disposed opposite to the test bench 20, and the second driving member 32 and the second guide rod 62 are disposed on the other side of the test bench 20, wherein one side of the test bench 20 close to the first guide rod 61 and the first driving member 31 and one side of the test bench 20 close to the second guide rod 62 and the second driving member 32 are opposite to each other of the test bench 20.

Illustratively, the number of the first guide rods 61 and the second guide rods 62 is two, the two first guide rods 61 respectively correspond to two corners of the test bench 20, the two second guide rods 62 respectively correspond to two other corners of the test bench 20, that is, the two first guide rods 61 and the two second guide rods 62 respectively correspond to four sides of the test bench 20, the first driving member 31 is disposed between the two first guide rods 61, and the second driving member 32 is disposed between the two second guide rods 62, wherein the first driving member 31 and/or the second driving member 32 is a cylinder, and of course, it is understood that the number of the first guide rods 61 and the second guide rods 62 is not limited thereto, the number of the first guide rods 61 may be more than two, and the number of the second guide rods 62 may be more than two.

For the pressing plate 50, as shown in fig. 1 or 3, the pressing plate 50 is coupled to the ceiling 40 fixed to the guide assembly 60. The shape of the pressing plate 50 is adapted to the shape of the insulating table 201 of the test board 20, a pressing portion 501 is disposed on a surface of the pressing plate facing the insulating table 201, and the pressing portion 501 is used for pressing the PCBA board to be tested along with the movement of the antenna board 40 towards the test board 20 when the PCBA board to be tested is carried on the insulating table 201 of the test board 20, so that each probe on the test board 20 is embedded into an electrical test hole of the PCBA board to be tested. For example, the pressing plate 50 may be made of an insulating material such as organic glass.

In summary, the PCBA testing jig provided by the embodiment of the present utility model adjusts the original middle independent cylinder layout to the respective independent cylinder layouts located at two opposite sides of the top plate 40, and the layout forms make the acting force of each part of the pressing plate 50 driven by the top plate 40 more uniformly dispersed, so as to improve the electrical contact performance between the PCBA plate and the probe of the test board 20, and further improve the accuracy of the PCBA testing jig.

In order to improve the reliability of the PCBA testing jig, as shown in fig. 1 to 3, in some embodiments of the present utility model, the PCBA testing jig further includes a light curtain emitting sensor 71 and a light curtain receiving sensor 72, both electrically connected to the controller of the box 10, the light curtain emitting sensor 71 and the light curtain receiving sensor 72 are respectively disposed at opposite sides of the window, and the light curtain emitting sensor 71 emits infrared rays to form a scanning light curtain capable of covering the window area. In this way, when the PCBA testing jig presses the PCBA board to be tested, the operation of the driving assembly 30 can be stopped when the body part of the user blocks the infrared rays emitted by the light curtain emitting sensor 71, so as to protect the user.

To widen the application range of the PCBA test fixture to accommodate PCBA boards of different sizes, in some examples of the utility model, the platen 50 and the test bench 20 of the PCBA test fixture are detachably connected. The surface of the pressing plate 50 facing the insulating table 201 is also provided with pressing bars corresponding to the positioning holes of the test bench 20, so that the pressing plate 50 is matched with the test bench 20 for use, and the pressing plate 50 and the test bench 20 of different types can be replaced according to different types of PCBA boards to be tested. For example, the screw may be screwed through the pressing plate 50 and the top plate 40 to realize the detachable connection between the pressing plate 50 and the top plate 40, and the test bench 20 is realized by a latch (not shown) and a third driving member (not shown), specifically, the PCBA test fixture may further include a latch and a third driving member, the third driving member is disposed in the console 12, the third driving member may drive the latch to move relative to the console 12 to extend or retract from the insulating table 201 of the console 12, the latch is in an unfolded state after the latch extends out of the insulating table 201, in the unfolded state, the latch may be inserted into a lock hole of the test bench 20 to realize the locking of the relative position between the test bench 20 and the box 10, the latch is in a folded state after the latch retracts into the insulating table 201, and in the folded state, the latch may exit the lock hole of the test bench 20 to realize the solution locking of the relative position between the test bench 20 and the box 10. The third driving member is an air cylinder.

Further, to precisely control the driving stroke of the third driving member, the PCBA testing fixture further includes a magnetic induction switch (not shown), which includes a magnetic ring (not shown) and a magnetic switch (not shown) both electrically connected to the controller of the console 12, the magnetic ring being mounted on the piston of the third driving member, and the magnetic switch being mounted on the cylinder of the third driving member.

The technical scheme of the utility model is further described by specifically describing the working process of the PCBA test fixture.

Firstly, positioning and mounting a pressing plate on a test bench through a pressing rod, and confirming that the pressing plate and the test bench are matched components; then, pushing the whole test bench and the pressing plate into a cavity of the box body through a track; then, the third driving piece is controlled to drive the lock catch to lock the test bench, so that the test bench is ensured to be fixed without looseness; then, the top plate is driven by the driving assembly to downwards approach the pressing plate, and then the pressing plate is screwed and fixed on the top plate through a screw; then, electrically connecting a probe of the test bench with external detection equipment, placing the PCBA board to be tested on an insulation table top of the test bench, starting a driving assembly to automatically press down by pressing a function button on the control bench, automatically triggering and executing the test after the driving assembly is pressed down in place, and stopping the driving assembly to act when infrared light emitted by a light curtain emission sensor is blocked in the process; after the test is completed, the antenna board moves upwards to be far away from the PCBA board and returns to the initial position under the drive of the driving assembly, and the test of the next PCBA board is prepared.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. PCBA test fixture, its characterized in that includes:

a housing having a chamber;

the test board is fixed at the bottom of the cavity and is used for bearing a PCBA board to be tested, and the test board is provided with a probe;

the driving assembly is arranged at two ends of the test bench and used for driving the antenna board to move.

2. The PCBA testing jig according to claim 1, wherein the driving assembly includes a first driving member and a second driving member, the first driving member and the second driving member being disposed opposite to opposite ends of the test stand, respectively, the first driving member and the second driving member being electrically connected to the controller of the case;

3. The PCBA testing jig according to claim 2, wherein the first and/or second driver is a cylinder.

4. The PCBA testing jig according to claim 2, further comprising a guide assembly including a first guide bar and a second guide bar, the first guide bar and the second guide bar being disposed opposite ends of the test stand, respectively, the ceiling being movably connected to the first guide bar and the second guide bar, respectively;

5. The PCBA testing jig according to claim 4, wherein the number of the first guide bars and the number of the second guide bars are two, and the two first guide bars and the two second guide bars are respectively disposed opposite to the periphery of the test board.

6. The PCBA testing jig according to any one of claims 1-5, wherein the housing further comprises a window in communication with the chamber;

7. The PCBA testing jig according to any one of claims 2-5, wherein the testing stand is detachably connected to the bottom of the chamber, the testing stand being provided with a positioning hole;

8. The PCBA testing jig according to claim 7, wherein a locking hole is provided at the bottom of the test stand;

9. The PCBA testing jig of claim 8, wherein the third driving member is a cylinder.

10. The PCBA testing jig according to claim 9, further comprising a magnetic induction switch comprising a magnetic ring and a magnetic switch both electrically connected to the controller of the case, the magnetic ring being mounted on the piston of the third driver, the magnetic switch being mounted on the cylinder of the third driver.