Reusable PCB composite jig

Abstract

The invention discloses a reusable composite jig for testing a PCB (Printed Circuit Board). The reusable composite jig comprises an upper jig and a lower jig, they have the same structure. Comprising a needle plate, a probe module, a PCB adapter plate and a bottom plate which are arranged in sequence from top to bottom and are fixed through connecting columns. A probe outlet matched with a PCB to be tested is arranged on the probe plate, a probe module is arranged between the probe plate and the PCB adapter plate, the probe module is a device for fixing the relative position of a probe, the PCB adapter plate and the bottom plate are both printed circuit boards, an ox horn and the probe are further installed on the bottom plate, and transmission of test data is achieved together. The problem that a traditional composite jig is difficult to reuse and needs a large amount of manual manufacturing is solved, and the jig can be repeatedly used except for the PCB adapter plate and the needle plate. Production automation can be achieved during installation of the printed circuit board and devices. Meanwhile, the manufacturing efficiency is improved, the manpower and material resource cost is reduced, and the production requirement is better met.

Description

Technical Field

[0001] The present invention relates to PCB measuring fixture technology, in particular to a PCB composite fixture. Background Art

[0002] PCBs, also known as printed circuit boards (PCBs), are crucial electronic components. Their quality largely determines the quality of electronic devices. During the production process, defects incur varying costs at each stage, and the earlier they are discovered, the lower the cost of remediation. During PCB production, circuit boards must be tested with electrical current to identify functional defects as early as possible and prevent them from being passed on to the next process. This requires the use of a test fixture, also known as a test jig. These fixtures are essentially beds of nails used to test the electrical performance parameters of PCBs. With the continuous development of electronic products, new products are constantly emerging. During the production process, external factors inevitably cause conductive defects such as short circuits, open circuits, and leakage. Visual screening alone is not enough to identify defective boards. Failure to promptly identify defective boards and allowing them to pass on to the next process inevitably results in further costly waste.

[0003] Therefore, testing is a crucial step in the production of PCB adapter boards. Testing can often reveal defects that are difficult to detect visually, such as open circuits and short circuits, that can affect functionality. However, during the PCB adapter board testing process, traditional composite fixtures are generally complex in structure, requiring a large amount of raw materials and requiring a high level of manual labor to manufacture. This impacts labor and material costs, resulting in losses for the company. Therefore, it is necessary to provide an efficient, simple, and reusable composite fixture to address these technical issues. Summary of the Invention

[0004] In response to the shortcomings of the above-mentioned technologies, the present invention aims to provide an efficient and reusable composite jig, which mainly solves the problem that traditional composite jigs are difficult to make and cannot be reused, resulting in waste of manpower and material costs, thereby improving the efficiency of jig making and reducing manpower and material costs, and better meeting the production usage needs.

[0005] To achieve the above-mentioned objectives, the present invention provides a reusable composite jig, comprising an upper jig and a lower jig. The upper and lower jigs have the same structure, including a needle plate, a probe module, a PCB adapter plate, and a base plate arranged in sequence from top to bottom. The layers of the boards are fixedly connected using connecting columns and / or screws. The needle plate is provided with a test interface, i.e., a probe outlet, that is compatible with the PCB adapter plate to be tested. A probe module is placed between the needle plate and the PCB adapter plate. The probe module is composed of a double-headed, double-action probe consisting of three pieces of fiberglass board or a material that can perform an equivalent function, a spring, and a probe. It can also be composed of a special double-headed, double-action probe and a piece of fiberglass board or a material that can perform an equivalent function. For densely packed BGA pad locations, a smaller probe module is manufactured in this way and placed in the middle. Special double-headed, double-action probes can be placed in other locations and fixed with foam or other alternative materials. This probe module can be used for other types of PCB boards to be tested, provided they have the same BGA. The PCB adapter board has a PCB circuit on the side adjacent to the needle board, and the pads are made in the same position as the pads of the PCB to be tested. Vias are drilled at the pad positions, and the vias limit the probe position and conduct electricity to the back side. The back side is made into a pad that matches the horn. This pad is connected to the bottom plate probe. The bottom plate is the PCB board on which the probe and horn are fixed.

[0006] Preferably, the needle board is made of epoxy glass fiber board material, and holes are drilled in the middle of the material to match the test points of the PCB board to be tested. The probes of the probe extend through these holes and contact the pads of the PCB board to be tested. At the same time, positioning holes are provided around the needle board, and connecting posts extend through these holes. The connecting posts are placed on the bottom surface and screws are placed on the top surface for fixing.

[0007] Preferably, the probe module is a special double-sided, double-headed, double-action probe module, which is composed of three fiberglass boards, a spring and a probe. The probe is nail-shaped, and the bottom is larger than the middle. Two fiberglass boards are drilled with holes with the same or slightly larger diameter as the middle of the probe, and the other fiberglass board is drilled with a hole with the same or slightly larger diameter as the bottom of the probe. Before fixing the three fiberglass boards, the spring and the probe are placed in the middle, and the multiple probes are combined and installed together. The periphery is fixed with connecting columns or screws. The three fiberglass boards can also be made of other alternative materials such as acrylic.

[0008] Preferably, the probe module is a special double-sided, double-headed, double-action probe module, which is composed of three fiberglass boards, a spring and a probe. The probe is nail-shaped, and the bottom is larger than the middle. Two fiberglass boards are drilled with holes with the same or slightly larger diameter as the middle of the probe, and the other fiberglass board is drilled with a hole with the same or slightly larger diameter as the bottom of the probe. Before fixing the three fiberglass boards, the spring and the probe are placed in the middle, and the multiple probes are combined and installed together. The periphery is fixed with connecting columns or screws. The three fiberglass boards can also be made of other alternative materials such as acrylic.

[0009] Preferably, the probe module can also be composed of a fiberglass board and a special double-headed double-action probe. This double-action double-headed double-action probe has a short and protruding latch on the needle tube, which is larger than the diameter in the middle of the needle tube. This can limit the relative position of the probe on the fiberglass board and the PCB adapter board so that it cannot move up and down. A fiberglass board can also be made of other alternative materials such as acrylic.

[0010] Preferably, the probe module can be made into a small structure, such as a dedicated probe module for the BGA area, which can be reused when other different models of PCB boards to be tested have the same BGA. Other relatively sparse probe positions can use foam or other alternative materials as fixing materials, with a double-headed double-action probe placed in the middle.

[0011] Preferably, the PCB adapter board substrate is a PCB circuit board, the pads of the circuit on one side are in the same position as the pads of the PCB board to be tested, and drill holes are placed in the pads to limit the position of the probe and connect with the pads on the back. The pads on the back are made into the same position as the PIN pins of the bull horns, and the pads on the back are arranged regularly to maximize the use of space for placement.

[0012] Preferably, the substrate of the bottom plate is a PCB circuit board, and pads are provided on the bottom and / or top layers. Multiple rows and columns of horns are installed on the bottom layer, and probes are placed at corresponding positions on the top layer. At the same time, positioning columns are provided on the bottom plate, which are connected to the connecting columns on the PCB adapter board.

[0013] Preferably, the connecting column is a cylindrical structure, the upper diameter of the cylinder is smaller than the middle diameter, and is stepped, which can be inserted into the positioning holes of the needle plate, connecting column, probe module, and PCB adapter plate. The lower middle position of the column is hollowed out to provide a hole containing a thread, and the connecting column containing a thread on the upper outer side can be fixedly connected. The connecting column connected to the needle plate is hollowed out in the upper middle position of the cylinder to provide a hole containing a thread, which is fixed with screws above the needle plate. The connecting column connected to the base plate is hollowed out in the lower middle position of the column to provide a circular hole for placing the positioning PIN.

[0014] Preferably, the needle plate, probe module, and PCB adapter plate are fixedly connected by connecting columns to form a complete part. When replacing the composite fixture, only this part needs to be replaced. The base plate is suitable for the universal composite fixture based on the present invention.

[0015] The beneficial effects of the present invention are as follows: compared with the prior art, the reusable composite fixture provided by the present invention is suitable for other tests except for the components composed of the needle plate, probe module and PCB adapter plate, does not need to be disassembled, and has high reusability. In addition, because the probe module and the PCB can be connected in a contact manner. When this composite fixture is not applicable, the probe can be disassembled and reused. In the entire test frame, only the PCB adapter plate and the needle plate are not reusable, which saves a lot of consumables. In addition, the original composite fixtures all use wire bonding on the probe for connection, which requires a lot of manual connection, while this method saves a lot of manual work through PCB processing and contact connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0017] Figure 2 The probe module structure of the present invention Figure 1 .

[0018] Figure 3 The probe module structure of the present invention Figure 2 .

[0019] Figure 4 This is a top view of the PCB adapter board of the present invention.

[0020] Figure 5 This is a bottom view of the PCB adapter board of the present invention.

[0021] Figure 6 This is a top view of the bottom plate structure diagram of the present invention.

[0022] Figure 7 This is the bottom view of the base plate structure diagram of the present invention.

[0023] The main component symbols are described as follows: 1. PCB to be tested 2. Needle board 3. Connecting column 4. Probe module 5. PCB adapter board 6. Base plate 40. Needle plate 41. Fiberglass board 42. PCB adapter plate 43. Probe 44. Spring 45. Screw 46. Connecting column 47. Double-headed double-action probe 48. Double-headed double-action probe with a stop 51. PCB adapter board 52. Solder pad 53. Positioning hole 61. Probe 62. PCB board 63. Positioning column 64. Screw 65. Horn. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the present invention, the present application is further described below in conjunction with the accompanying drawings.

[0025] See also Figure 1 The present application discloses a reusable composite fixture, including an upper fixture and a lower fixture. The upper fixture and the lower fixture have the same structure, including a needle plate 2, a probe module 4, a PCB adapter plate 5 and a base plate 6, which are arranged in sequence from top to bottom.

[0026] The needle board 2 is made of epoxy glass fiber board material. Holes corresponding to the test points of the PCB board 1 to be tested are drilled in the middle of the material. The probe tips extend through these holes and contact the pads of the PCB board 1 to be tested. At the same time, positioning holes are also provided around the needle board 2. Connecting posts 46 extend through these holes and are fixed with screws 45.

[0027] The probe module 4 is a special double-sided, double-headed, double-action probe module, which consists of three fiberglass boards 41, a spring 44 and a probe 43. The probe 43 is nail-shaped, with the bottom larger than the middle. Two fiberglass boards 41 are drilled with holes with the same or slightly larger diameter as the middle of the probe 43, and the other fiberglass board 41 is drilled with a hole with the same or slightly larger diameter as the bottom of the probe 43. The multiple probes are combined and installed together, with a spring 44 placed in the middle and fixed around with connecting columns 46.

[0028] The probe module 4 can also be composed of a fiberglass board 41 and a special double-headed double-action probe 48. This double-action double-headed double-action probe 48 has a short and protruding clamping position on the needle tube, which is larger than the diameter of the middle of the needle tube. It can limit the relative position of the probe on the fiberglass board 41 and the PCB adapter board 42 so that it cannot move up and down.

[0029] The probe module 4 can be made into a small structure. For example, a dedicated probe module 4 can be made for the BGA area, which can be reused when other different models of PCB boards 1 to be tested have the same BGA. Other sparser probe positions can use foam or other alternative materials as fixing materials, with a double-headed double-action probe 48 placed in the middle.

[0030] The substrate of the PCB adapter board 5 is a PCB circuit board. The pads 52 of the circuit on one side are consistent with the pads of the PCB board 1 to be tested, and a drill hole is placed in the pad to limit the position of the probe and connect it with the pads on the back. The pads on the back are made into the same position as the PIN pins of the horns 65. The pads on the back are arranged regularly to maximize the use of space for placement.

[0031] The substrate of the bottom plate 6 is a PCB circuit board, and the bottom and / or top layers are provided with solder pads 52. Multiple rows and columns of horns 65 are installed on the bottom layer, and probes 61 are placed at corresponding positions on the top layer. At the same time, positioning columns 63 are provided on the bottom plate to fix the connection with the PCB adapter plate 5.

[0032] The connecting column 46 is a cylindrical structure. The upper diameter of the cylinder is smaller than the middle diameter and is stepped. It can be inserted into the positioning holes of the needle plate 2, the connecting column 3, the probe module 4, and the PCB adapter plate 5. The lower middle position of the column is hollowed out to provide a hole with a thread, so that the connecting column with a thread on the upper outer side can be fixedly connected. The connecting column 46 connected to the needle plate 2 is hollowed out in the upper middle position of the cylinder to provide a hole with a thread, and is fixed with a screw 45 above the needle plate 2. The connecting column 46 connected to the base plate 6 is hollowed out in the lower middle position of the column to provide a circular hole for placing the positioning PIN.

[0033] The needle plate 2, the probe module 4, and the PCB adapter plate 5 are fixedly connected by the connecting column 3 to form a complete part. When replacing the composite fixture, only the entire part of this part needs to be replaced. The bottom plate 6 is suitable for the universal composite fixture based on the present invention.

[0034] When testing the PCB board 1 to be tested, the probe of the probe module 4 extends from the hole of the needle plate 2 for power-on detection. The relevant data information is transmitted to the horn 65 through the probe module 4 and the PCB adapter plate 5 and then through the probe 61 on the bottom plate 6. The horn 65 is then connected to the computer equipment to analyze the test data information.

[0035] The above disclosures are only a few specific embodiments of the present invention, but the present invention is not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A reusable PCB composite jig includes an upper jig and a lower jig, characterized in that: The PCB composite jig, the upper jig and the lower jig have the same structure, including a needle plate, a probe module, a PCB adapter plate and a bottom plate arranged in sequence from top to bottom, and each layer of the board is fixed by a connecting device.

2. A probe module, characterized in that: The probe module is a special double-sided, double-headed, double-action probe module, which is composed of three fiberglass boards, springs and probes. The probes are nail-shaped, with the bottom larger than the middle. Two fiberglass boards are drilled with holes with the same or slightly larger diameter as the middle of the probes, and the other fiberglass board is drilled with a hole with the same or slightly larger diameter as the bottom of the probes. Before fixing the three fiberglass boards, the springs and probes are placed in the middle, and the multiple probes are combined and installed together. Connecting columns or screws are used to fix them around. The fiberglass boards can also be made of other alternative materials such as acrylic.

3. A circuit board capable of transferring PCB test signals, characterized in that: The PCB adapter board substrate is a PCB circuit board. The pads of the circuit on one side are consistent with the pads of the PCB board to be tested, and drill holes are placed in the pads to limit the position of the probe and connect with the pads on the back. The pads on the back are made into the same position as the PIN pins of the bull horns.

4. A multi-purpose testing base plate, characterized by: The substrate of the circuit board connecting the horns and the probes is a PCB circuit board, and pads are provided on the bottom layer and / or the top layer. Multiple rows and columns of horns are installed on the bottom layer, and probes are placed at corresponding positions on the top layer.

5. According to claim 1, the reusable PCB composite fixture is characterized in that: The needle board is made of epoxy glass fiber board material. Holes corresponding to test points on the PCB to be tested are drilled in the middle of the material. The probes of the probe extend through these holes and contact the pads on the PCB to be tested. At the same time, positioning holes are provided around the needle board. Connecting posts extend through these holes. The connecting posts are placed on the bottom surface and screws are placed on the top surface for fixing. The glass fiber board can also be made of other alternative materials such as acrylic.

6. According to claim 1, the reusable PCB composite fixture is characterized in that: The probe module is a special double-sided, double-headed, double-action probe module, which is composed of three fiberglass boards, springs and probes. The probes are nail-shaped, with the bottom larger than the middle. Two fiberglass boards are drilled with holes with the same or slightly larger diameter as the middle of the probes, and the other fiberglass board is drilled with a hole with the same or slightly larger diameter as the bottom of the probes. Before fixing the three fiberglass boards, the springs and probes are placed in the middle, and the multiple probes are combined and installed together. Connecting columns or screws are used to fix them around. The fiberglass boards can also be made of other alternative materials such as acrylic.

7. According to claim 3, the reusable PCB composite fixture is characterized in that: The probe module can also be composed of a fiberglass board and a special double-headed double-action probe. This double-action double-headed double-action probe has a short and protruding clamping position on the needle tube, which is larger than the diameter of the middle of the needle tube. The fiberglass board can also be composed of other alternative materials such as acrylic.

8. According to claim 1, the reusable PCB composite fixture is characterized in that: The PCB adapter board substrate is a PCB circuit board. The pads of the circuit on one side are consistent with the pads of the PCB board to be tested, and drill holes are placed in the pads to limit the position of the probe and connect with the pads on the back. The pads on the back are made into the same position as the PIN pins of the bull horns.

9. According to claim 1, the reusable PCB composite fixture is characterized in that: The substrate of the bottom plate is a PCB circuit board, the bottom layer and / or the top layer are provided with pads, multiple rows and columns of horns are installed on the bottom layer, and probes are placed at corresponding positions on the top layer.

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