Fct test assembly and test device

Abstract

The utility model provides a kind of FCT test component and testing device, FCT test component includes lower needle plate, carrier plate, lower pressure subassembly and lower pressure driving device, carrier plate is arranged between lower needle plate and lower pressure subassembly, lower needle plate is equipped with probe, carrier plate is equipped with through hole, lower pressure driving device drives lower pressure subassembly to move up and down, force probe to pass through through hole, lower pressure subassembly includes lower pressure plate, floating plate and multiple first spring thimble, floating plate is connected in the lower side of lower pressure plate by first spring thimble, there is first preset gap between floating plate and lower pressure plate, floating plate can be elastically moved up and down relative to lower pressure plate;Lower needle plate is equipped with multiple second spring thimble, carrier plate is connected on lower needle plate by second spring thimble, there is second preset gap between lower needle plate and carrier plate, carrier plate can be elastically moved up and down relative to lower needle plate, carrier plate is equipped with bearing surface and positioning column, positioning column is protruded to bearing surface preset distance;The utility model not only simple structure, and will not cause impact to the product to be measured.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, specifically to an FCT testing component and testing device. Background Technology

[0002] In the electronics manufacturing industry, Functional Circuit Test (FCT) is a crucial step in ensuring that the core circuit board (PCBA) of electronic products meets its design requirements. FCT testing equipment verifies the functionality of the circuit board by simulating its actual operating environment (such as power supply, signal input / output, communication protocols, etc.), thereby ensuring product quality.

[0003] A test fixture for rigid-flex PCBs includes a machine base with multiple guide posts. Positioning seats for positioning the rigid-flex PCB are slidably connected to the guide posts. Return springs are fitted onto the guide posts. The positioning seats have positioning grooves A, receiving grooves, and positioning grooves B. Multiple through holes for test probes to pass through are provided on the positioning seats. A mounting seat for mounting the test probes is located directly below the positioning seats. The machine base also includes a pressing mechanism for driving the positioning seats and the rigid-flex PCB downwards, thereby causing the test probes to contact the contacts on the rigid-flex PCB. The pressing mechanism includes guide posts on the machine base, with sliding seats slidably connected to the guide posts. A pressure plate is located at the bottom of the sliding seat, and a protective plate made of elastic material is connected to the bottom of the pressure plate, contacting the positioning seats and the rigid-flex PCB. The machine base also includes a drive assembly for driving the sliding seat downwards. While this test fixture can achieve contact between the test probes and the contacts on the rigid-flex PCB, its structure is complex, which is not conducive to assembly and cost savings. Utility Model Content

[0004] The primary objective of this invention is to provide an FCT testing component that has a simple structure and does not cause impact to the product under test.

[0005] The second objective of this invention is to provide a testing device that includes the aforementioned FCT testing components.

[0006] To achieve the aforementioned first objective, the FCT testing assembly provided by this utility model includes a lower needle plate, a carrier plate, a pressing assembly, and a pressing drive device. The carrier plate is disposed between the lower needle plate and the pressing assembly. A probe is disposed on the lower needle plate, and a through hole is disposed on the carrier plate. The pressing drive device drives the pressing assembly to move up and down, forcing the probe to pass through the through hole. The pressing assembly includes a pressing plate, a floating plate, and multiple first spring pins. The floating plate is connected to the lower side of the pressing plate via the first spring pins, and a first preset gap exists between the floating plate and the pressing plate, allowing the floating plate to move elastically up and down relative to the pressing plate. Multiple second spring pins are disposed on the lower needle plate, and the carrier plate is connected to the upper side of the lower needle plate via the second spring pins, with a second preset gap between the lower needle plate and the carrier plate, allowing the carrier plate to move elastically up and down relative to the lower needle plate. The carrier plate is provided with a supporting surface and a positioning post, with the positioning post protruding from the supporting surface by a preset distance.

[0007] As can be seen from the above scheme, by setting the first spring pin, when the pressing component presses down, after the floating plate comes into contact with the product under test or the carrier plate, the floating plate will move upward, which plays a buffering role to reduce the impact of the floating plate on the product under test or the carrier plate and avoid damage to the product under test; by setting the second spring pin, under normal conditions, the carrier plate is away from the lower needle plate and the probe is recessed in the through hole. When the floating plate pushes the carrier plate and the product under test downward, the probe protrudes out of the through hole and contacts the contact point of the product under test, connecting the product under test to the detection circuit; this utility model also has the advantages of simple structure, convenient operation and low production cost.

[0008] A further option is that the pressing assembly also includes multiple first shoulder screws, which pass through the pressing plate and the first preset gap to connect with the floating plate, and the first shoulder screws can move synchronously with the floating plate.

[0009] A further solution is to provide a pushing surface on the bottom wall of the floating plate, which can abut against the positioning column to push the carrier plate downward.

[0010] A further embodiment is that the carrier plate has a first mounting hole, and an abutment portion is provided between the two ends of the first mounting hole; the positioning post includes a positioning portion, a step portion and a fixing portion from top to bottom, the fixing portion is fixedly installed in the first mounting hole, the step portion abuts against the abutment portion, and the positioning portion protrudes upward from the first mounting hole. As can be seen from the above scheme, by abutting the stepped part and the abutting part, the floating plate can abut against the positioning column and push the carrier plate and the product under test on it downward, thus avoiding damage to the product under test.

[0011] A further design involves a protrusion on the lower needle plate through which the probe passes vertically; a groove is provided on the bottom wall of the carrier plate, which communicates with the through hole, allowing the protrusion to be embedded in the groove, and the upper part of the probe to be positioned within the through hole.

[0012] As can be seen from the above scheme, setting a through-protrusion at the top and bottom of the probe helps to protect the probe and prevent it from breaking.

[0013] A further embodiment includes a test assembly comprising a base box, a cover plate, and a control module. The control module is mounted on the base box and is electrically connected to the probe and the pressure drive device. The cover plate is mounted on the base box and has a mounting groove and multiple first positioning mating parts. The lower needle plate is mounted in the mounting groove, and the multiple first positioning mating parts are respectively located around the mounting groove. The carrier plate has multiple second positioning mating parts, which are connected to the first positioning mating parts.

[0014] A further solution is to provide multiple second shoulder screws on the cover plate, which pass through the carrier plate and the second preset gap and are connected to the cover plate, and the carrier plate can move up and down relative to the second shoulder screws.

[0015] A further option is to install the pressure drive device inside the bottom box and connect it to the bottom wall of the cover plate, with the drive rod of the pressure drive device passing through the cover plate and connecting to the pressure assembly.

[0016] To achieve the second objective mentioned above, the testing device provided by this utility model includes a machine base, a display screen, a keyboard, a mouse, and the aforementioned testing components. The display screen and the testing components are both mounted on the machine base, which is equipped with a pull-out drawer. The keyboard and mouse are both mounted inside the drawer, and the display screen is electrically connected to the keyboard and mouse respectively.

[0017] A further solution is to install a storage cavity inside the machine, with an adjustable storage height. Attached Figure Description

[0018] Figure 1 This is a structural diagram of an embodiment of the FCT test component of this utility model.

[0019] Figure 2 This is an exploded view of an embodiment of the FCT test component of this utility model.

[0020] Figure 3 This is an exploded view of the carrier plate, lower needle plate, and cover plate in an embodiment of the FCT test component of this utility model.

[0021] Figure 4 This is a top view of an embodiment of the FCT test component of this utility model.

[0022] Figure 5 yes Figure 4 Sectional view at point AA.

[0023] Figure 6 yes Figure 5 Enlarged view of point B in the middle.

[0024] Figure 7This is a top view of the pressing component in an embodiment of the FCT test component of this utility model.

[0025] Figure 8 yes Figure 7 Sectional view at point CC.

[0026] Figure 9 yes Figure 8 Enlarged view of point D in the middle.

[0027] Figure 10 This is a top view of the carrier plate in an embodiment of the FCT test component of this utility model.

[0028] Figure 11 yes Figure 10 Sectional view at EE.

[0029] Figure 12 yes Figure 11 Enlarged view of point F in the middle.

[0030] Figure 13 This is a structural diagram of an embodiment of the testing device of this utility model.

[0031] Figure 14 This is a structural diagram of the machine tool in an embodiment of the testing device of this utility model.

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0033] FCT test component example: See Figures 1 to 6 The FCT test assembly 10 provided in this embodiment includes a base box 1, a cover plate 2, a control module (not shown in the figure), a lower needle plate 3, a carrier plate 4, a pressing assembly 5, and two pressing drive devices 6.

[0034] The control module is mounted on the bottom box 1 and is electrically connected to the probe 31 and the pressure drive device 6.

[0035] The cover plate 2 is mounted on the bottom box 1. The cover plate 2 is provided with a mounting groove 21 and four first positioning mating parts 22. The four first positioning mating parts 22 are respectively arranged around the mounting groove 21.

[0036] The lower needle plate 3 is set in the mounting groove 21, and multiple probes 31 are set on the lower needle plate 3.

[0037] The carrier plate 4 is positioned above the lower needle plate 3. The carrier plate 4 has four second positioning mating parts 41, each corresponding to and connected to a first positioning mating part 22. Either the first positioning mating part 22 or the second positioning mating part 41 can be a guide sleeve, and the other a guide post. In this embodiment, the first positioning mating part 22 is preferably a guide sleeve, and the second positioning mating part 41 is preferably a guide post. The carrier plate 4 has multiple through holes 43, each corresponding to a multiple probe 31.

[0038] The pressing assembly 5 is positioned above the carrier plate 4. Two pressing drive devices 6 are located inside the base box 1 and connected to the left and right sides of the bottom wall of the cover plate 2, respectively. The drive rods of the pressing drive devices 6 pass through the cover plate 2 and connect to the pressing assembly 5. The pressing drive devices 6 drive the pressing assembly 5 to move up and down, forcing the probe 31 through the through hole 43.

[0039] See Figures 7 to 9 The pressing assembly 5 includes a pressing plate 51, a floating plate 52, multiple first spring pins 53 and four first shoulder screws 54.

[0040] The floating plate 52 is connected to the lower pressure plate 51 via a first spring pin 53. A first preset gap 55 exists between the floating plate 52 and the lower pressure plate 51, allowing the floating plate 52 to move elastically up and down relative to the lower pressure plate 51. The first spring pin 53 serves both as an elastic movement mechanism and a guide. The first spring pin 53 includes a fixed sleeve 531, a fixed rod 532, and an elastic element 533. The fixed sleeve 531 is fixedly connected to the lower pressure plate 51. The upper part of the fixed rod 532 passes through the fixed sleeve 531, and the lower part of the fixed rod 532 is fixedly connected to the floating plate 52 via screws. The elastic element 533 elastically abuts against the fixed sleeve 531 and the fixed rod 532, allowing the fixed rod 532 to move up and down relative to the fixed sleeve 531.

[0041] The lower pressure plate 51 has four first stepped holes 511 extending through it. First shoulder screws 54 pass through the first stepped holes 511 and the first preset gap 55 to connect with the floating plate 52. When the floating plate 52 moves up and down, the first shoulder screws 54 can move synchronously with the floating plate 52. The first shoulder screws 54 can prevent the floating plate 52 from separating from the lower pressure plate 51, thus ensuring the height of the first preset gap 55.

[0042] The bottom wall of the floating plate 52 is provided with a pushing surface 521, which can abut against the positioning column 46 or the product to be tested to push the carrier plate 4 downward.

[0043] See Figures 3 to 6The lower needle plate 3 is provided with a plurality of second spring ejector pins 32. The carrier plate 4 is connected to the upper side of the lower needle plate 3 via the second spring ejector pins 32. There is a second preset gap 33 between the lower needle plate 3 and the carrier plate 4. The carrier plate 4 can move elastically up and down relative to the lower needle plate 3. The structure of the second spring ejector pin 32 is similar to that of the first spring ejector pin 53, and will not be described in detail here.

[0044] The lower needle plate 3 is provided with multiple protrusions 34, and each protrusion 34 is provided with several probes 31.

[0045] The bottom wall of the carrier plate 4 has multiple grooves 42, and each groove 42 has several through holes 43. The protrusion 34 can be inserted into the groove 42, and the upper part of the probe 31 is disposed in the through hole 43.

[0046] The cover plate 2 is provided with four second shoulder screws 23, and the carrier plate 4 is provided with four second stepped holes 44. The second shoulder screws 23 pass through the second stepped holes 44 and the second preset gap 33 and are connected to the cover plate 2. When the carrier plate 4 can move up and down relative to the second shoulder screws 23, the first shoulder screw 54 can restrict the carrier plate 4 from separating from the lower needle plate 3 to ensure the height of the second preset gap 33.

[0047] See Figures 10 to 13 The carrier plate 4 is provided with a support surface 45 and multiple positioning posts 46. The support surface 45 is used to support the product to be tested. The support surface 45 may have multiple recesses formed according to the structure of the product to be tested. The recesses are recessed into the support surface 45. The multiple positioning posts 46 are distributed on the support surface 45, and the positioning posts 46 protrude from the support surface 45 by a preset distance. The preset distance is equal to or slightly greater than the thickness of the product to be tested.

[0048] The carrier plate 4 has multiple first mounting holes 47, and each first mounting hole 47 corresponds to a positioning post 46. The first mounting hole 47 is a stepped hole, and an annular abutment part 471 is provided between the two ends of the first mounting hole 47.

[0049] The positioning post 46 includes, from top to bottom, a positioning part 461, a step part 462, and a fixing part 463. The fixing part 463 is fixedly disposed in the first mounting hole 47. The step part 462 abuts against the abutting part 471. The positioning part 461 protrudes upward from the first mounting hole 47 and is used to cooperate with the positioning hole of the product to be tested. Example of a testing device: See Figure 13 and Figure 14 The testing device provided in this embodiment includes a machine base 20, a display screen 30, a keyboard (not shown in the figure), a mouse (not shown in the figure), and the FCT testing component 10 of the above embodiment.

[0050] The display screen 30 and the test component 10 are both mounted on the machine base 20. The machine base 20 is equipped with a pull-out drawer 201. The keyboard and mouse are both mounted inside the drawer 201. The display screen 30 is electrically connected to the keyboard and mouse respectively.

[0051] The machine 20 is equipped with a storage cavity, the storage height of which is adjustable. Specifically: The machine base 20 is equipped with a tray 202 and two uprights 203, which are arranged opposite each other. The tray 202 is detachably connected between the two uprights 203, forming a storage cavity between the tray 202 and the two uprights 203. Multiple second mounting holes are arranged vertically on the uprights 203, and third mounting holes are provided on both sides of the tray 202. The tray 202 is connected to the uprights 203 by screws, which pass through the third mounting holes and connect to any of the second mounting holes. By selecting a suitable second mounting hole, the height of the tray 202 can be adjusted, thereby adjusting the storage height of the storage cavity.

[0052] In summary, this invention, by setting the first spring-loaded pin 53, allows the floating plate 52 to move upwards when it comes into contact with the product under test or the carrier plate 4 after the pressing component 5 is pressed down. This serves as a buffer, reducing the impact of the floating plate 52 on the product under test or the carrier plate 4 and preventing damage to the product under test. By setting the second spring-loaded pin 32, the carrier plate 4 is normally away from the lower pin plate 3, and the probe 31 is recessed in the through hole 43. When the floating plate 52 pushes the carrier plate 4 and the product under test downwards, the probe 31 protrudes out of the through hole 43 and contacts the contact point of the product under test, connecting the product under test to the detection circuit. This invention also has the advantages of simple structure, convenient operation, and low production cost.

[0053] Finally, it should be emphasized that the above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An FCT testing assembly, comprising a lower needle plate, a carrier plate, a pressing assembly, and a pressing drive device, wherein the carrier plate is disposed between the lower needle plate and the pressing assembly, a probe is disposed on the lower needle plate, the carrier plate is provided with a through hole, and the pressing drive device drives the pressing assembly to move up and down, forcing the probe to pass through the through hole, characterized in that: The pressing assembly includes a pressing plate, a floating plate, and a plurality of first spring pins. The floating plate is connected to the lower side of the pressing plate through the first spring pins. There is a first preset gap between the floating plate and the pressing plate. The floating plate can move elastically up and down relative to the pressing plate. The lower needle plate is provided with a plurality of second spring pins, and the carrier plate is connected to the upper side of the lower needle plate through the second spring pins. There is a second preset gap between the lower needle plate and the carrier plate. The carrier plate can move elastically up and down relative to the lower needle plate. The carrier plate is provided with a support surface and a positioning post. The positioning post protrudes from the support surface by a preset distance.

2. The FCT test assembly according to claim 1, characterized in that: The pressing assembly also includes a plurality of first shoulder screws, which pass through the pressing plate and the first preset gap and are connected to the floating plate. The first shoulder screws can move synchronously with the floating plate.

3. The FCT testing component according to claim 1, characterized in that: The bottom wall of the floating plate is provided with a pushing surface, which can abut against the positioning column to push the carrier plate downward.

4. The FCT testing component according to claim 3, characterized in that: The carrier plate has a first mounting hole, and an abutment portion is provided between the two ends of the first mounting hole; The positioning post includes a positioning part, a step part, and a fixing part from top to bottom. The fixing part is fixedly disposed in the first mounting hole, the step part abuts against the abutting part, and the positioning part protrudes upward from the first mounting hole.

5. The FCT test assembly according to claim 1, characterized in that: The lower needle plate is provided with a protrusion, and the probe passes through the protrusion vertically. The bottom wall of the carrier plate has a groove that communicates with the through hole. The protrusion can be embedded in the groove, and the upper part of the probe is disposed in the through hole.

6. The FCT test assembly according to claim 1, characterized in that: The test assembly also includes a base box, a cover plate, and a control module. The control module is mounted on the base box and is electrically connected to the probe and the pressure drive device, respectively. The cover plate is disposed on the bottom box. The cover plate is provided with a mounting groove and a plurality of first positioning mating parts. The lower needle plate is disposed in the mounting groove. The plurality of first positioning mating parts are respectively disposed around the mounting groove. The carrier plate is provided with a plurality of second positioning mating parts, and the second positioning mating parts are connected to the first positioning mating parts.

7. The FCT test assembly according to claim 6, characterized in that: The cover plate is provided with a plurality of second shoulder screws, which pass through the carrier plate and the second preset gap and are connected to the cover plate. The carrier plate can move up and down relative to the second shoulder screws.

8. The FCT test assembly according to claim 6, characterized in that: The pressing drive device is located inside the bottom box and connected to the bottom wall of the cover plate. The drive rod of the pressing drive device passes through the cover plate and is connected to the pressing assembly.

9. A testing apparatus, characterized in that: The device includes a machine, a display screen, a keyboard, a mouse, and the FCT testing component as described in any one of claims 1 to 8. The display screen and the testing component are both disposed on the machine. The machine is provided with a pull-out drawer. The keyboard and the mouse are both disposed in the drawer. The display screen is electrically connected to the keyboard and the mouse respectively.

10. The testing apparatus according to claim 9, characterized in that: The machine tool is equipped with a storage cavity, and the storage height of the storage cavity is adjustable.

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