Test fixture and test method

Abstract

The invention provides a test fixture and a test method, and the test fixture is characterized in that the test fixture comprises a substrate, a cover plate and a carrying disc assembly, the carrying disc assembly comprises a carrying plate, an acupoint carrying disc which is located on the carrying plate and is used for placing a product to be tested, and a plurality of probes; the acupoint loading disc is provided with a plurality of probe holes, a vacuum adsorption hole and a visual identification point which is aligned with a product to be tested; the first air cylinder assembly comprises a first air cylinder, a first adjusting valve, a vacuum pipe and a jacking rod, and the horizontal lifting synchronous driving assembly can drive the cover plate to do synchronous horizontal movement and lifting movement, so that before testing, the cover plate can be driven to horizontally move along the Y axis to reach the position above the carrying disc assembly; after the test is completed, the cover plate can ascend along the Z axis to leave the product to be tested and synchronously and horizontally move along the Y axis to be away from the carrying disc assembly.

Description

Technical Field

[0001] The present invention relates to the field of automated testing, and more particularly to a test fixture and a product testing method based on the test fixture. Background Art

[0002] The production process of chips, IC components, and other components often requires testing using various automated equipment. Existing automated test equipment / devices require test fixtures that match the product. Common test fixtures are often custom-designed for each piece of equipment, in conjunction with the development and design of the automated test equipment. In other words, the test fixture is often an integral part of the automated equipment, often simply providing placement for the product under test. Pre-test positioning, placement, pre-test fixation, during-test fixation, and cover opening and closing are often performed by various mechanisms within the automated equipment. Essential test fixture functions, such as pre-test positioning, placement, pre-test fixation, during-test fixation, and cover opening and closing, are highly dependent on other mechanisms within the automated equipment and cannot be achieved through the test fixture's own structure. This presents numerous inconveniences. Firstly, when problems arise, multiple mechanisms within the automated equipment must be inspected and repaired, making it impossible to quickly replace the test fixture for repair. Furthermore, adapting the test fixture to different products simply by replacing the test fixture or its components is impossible. In addition, since these functions are implemented through other mechanisms of the automated equipment, it is not conducive to reducing the size of the automated test equipment and cannot achieve miniaturized design; it is also not conducive to further improving the efficiency of the test, and it is impossible to guarantee the reliability and consistency of the basic functions of the test fixture. Summary of the Invention

[0003] One purpose of the present invention is to provide a test fixture that does not rely on the shape of the product and the shape of the groove on the acupuncture point carrier for positioning. Even if the tolerance of the product shape is large, it will not affect the contact between the product and the probe. The fixture can be adapted to products of various shapes and even different types of products.

[0004] One purpose of the present invention is to provide a test fixture that can overcome the technical difficulties of the traditional test fixture that relies on the floating structure of the acupoint carrier, and presses the acupoint carrier probe by a pressure cover to expose and contact the product, resulting in changes in the product benchmark and low yield of sensitive tests.

[0005] One purpose of the present invention is to provide a test fixture that can respond as quickly as possible to the product during the placement process and complete precise positioning matching with the acupuncture point carrier on which the product is placed, and can quickly output an alarm if the product is placed tilted or fails to be positioned, thereby avoiding strong pressure on the product and causing it to be crushed.

[0006] One object of the present invention is to provide a test fixture that adopts a modular design. The test fixture itself integrates multiple basic functions such as positioning of the product to be tested, vacuum adsorption fixation before testing, automatic opening and closing of the cover, automatic fixation during the product testing process, and automatic extension and retraction of the probe.

[0007] Another object of the present invention is to provide a test fixture whose basic functions are independent of other mechanisms of the automation equipment, has good independence, can be quickly assembled, replaced and repaired, and can be adapted to a variety of different test products and different automation equipment.

[0008] Another object of the present invention is to provide a test fixture having high integration and collaboration of related structures, which is conducive to miniaturization, improving test efficiency, and improving the reliability and consistency of various basic functions.

[0009] According to one aspect of the present invention, the present invention provides a test fixture, characterized in that it includes: Base and cover plates, and A carrier plate assembly, the carrier plate assembly comprising a carrier plate, an acupuncture point carrier plate located on the carrier plate for placing the product to be tested, and a plurality of probes, wherein the acupuncture point carrier plate has a plurality of probe holes, vacuum adsorption holes, and visual identification points for mutual positioning with the product to be tested; a first cylinder assembly, comprising a first cylinder, a first regulating valve, a vacuum tube, and a lifting rod, wherein one end of the vacuum tube is connected to the first regulating valve, and the other end is connected to the vacuum adsorption hole, so that when the first regulating valve is evacuated, the vacuum adsorption hole can adsorb and fix the product to be tested; the lifting rod is connected to the first cylinder, so that when the first regulating valve is inletted, the lifting rod can be driven to rise, thereby lifting the probe out of the probe hole and pressing against the test point of the product to be tested for testing; A horizontal lifting synchronous drive assembly, the cover plate is connected to the horizontal lifting synchronous drive assembly, and the horizontal lifting synchronous drive assembly can drive the cover plate to synchronously move horizontally and lift, so that before the test, the cover plate can be driven to move horizontally along the Y axis to reach above the carrier assembly, and synchronously descend along the Z axis to press the product to be tested. After the test is completed, the cover plate can rise along the Z axis to leave the product to be tested and synchronously move horizontally along the Y axis away from the carrier assembly. In this way, 1. Different from the traditional fixture that places the upper needle mold groove on the product and positions it with the product shape to complete the contact between the probe and the product, the invention does not rely on the product shape. The product test point (i.e., the probe point) is photographed and identified by the loading and unloading mechanism to form a coordinate system, and the positioning is completed with the visual identification point (i.e., the mark point) of the acupuncture point carrier on which the product is placed as the reference coordinate system. In this way, the large tolerance of the product shape does not affect the contact between the product and the probe, and the same fixture can be adapted to products of various shapes, or even different types of products. 2. Different from traditional fixtures, the upper needle mold for placing products is generally fixed. The upper needle mold for placing products generally floats up and down. The product is placed on it and pressed down by the pressure cover. As the pressure cover is pressed down, the probe is exposed and contacts the product. The acupuncture point carrier created by the present invention is fixed. After the pressure cover presses the product, the first cylinder assembly pushes the probe up from the bottom to contact the product, ensuring that the benchmark of the product remains fixed, and the yield of sensitive testing is the best. The efficiency and reliability of the test are significantly improved. 3. Different from traditional fixtures, the upper needle mold for placing products does not have the function of vacuum suctioning products. During the process of taking and placing the product, the product may be tilted and there is no way to output the signal accurately. The acupuncture point carrier created by the present invention has the function of vacuum suction. During the process of taking and placing the product, the product can respond as quickly as possible to complete the accurate positioning match with the acupuncture point carrier for the product. In addition, if the product is tilted, the vacuum meter can quickly output an alarm signal, so that the cover will not force the product to be crushed.

[0010] In one embodiment, the carrier assembly is removably mounted on one side of the base plate, and the first cylinder assembly is fixedly positioned on the other side of the base plate, opposite the carrier assembly. This allows the same first cylinder assembly to achieve both vacuum fixation during product placement and the raising and retracting of the probe, resulting in a simple and efficient structure that also helps reduce the size of the test fixture. The removable and replaceable carrier assembly facilitates easy replacement for different product configurations.

[0011] In one embodiment, the horizontal lifting synchronous drive assembly further includes a second cylinder, a piston rod, and a transmission member, wherein the piston rod extends along the Y-axis and is driven by the second cylinder. The transmission member includes a main body extending along the X-axis, and left and right transmission arms disposed on left and right sides of the main body. The main body of the transmission member is fixedly connected to the piston rod, the left and right transmission arms extend along the Y-axis, and the outer side surfaces of the left and right transmission arms are respectively provided with outer guide pins. The base plate is provided with left and right vertical plates at intervals on both sides of the carrier assembly along the X-direction, and the inner side surfaces of the left and right vertical plates are respectively provided with left and right slide grooves. When the transmission member moves along the Y-axis, the outer guide pins are limited and guided by the left and right slide grooves and slide linearly therein. In this way, the transmission member can ensure smooth movement and high coordination, thereby improving work efficiency.

[0012] In one embodiment, the horizontal lifting synchronous drive assembly further includes a slider and two guide rails extending along the Y-axis. The guide rails are directly or indirectly fixed to the base plate and are located on either side of the piston rod. The slider is slidably mounted on the guide rails and is capable of sliding along the Y-axis. This ensures smooth and reliable movement of the slider, further improving the smoothness of the horizontal lifting synchronous drive assembly and enhancing internal coordination and efficiency.

[0013] In one embodiment, the cover plate is provided with a plurality of uprights extending downward from the cover plate along the Z-axis. The slider is provided with a plurality of axial holes extending along the Z-axis. The cover plate is inserted into the axial holes of the slider via the uprights, thereby securing the slider and cover plate in the Y-axis direction and enabling synchronous movement. In the Z-axis direction, the cover plate can be raised and lowered relative to the slider. This achieves synchronization of horizontal movement between the cover plate and the slider without restricting the raising and lowering of the cover plate relative to the slider, cleverly achieving synchronization of transmission and two-dimensional motion.

[0014] In one embodiment, the inner side surfaces of the left and right transmission arms of the transmission member are each provided with an inner guide pin. The cover plate is correspondingly provided with an inclined guide slot on both sides of the cover plate in the X-axis direction, the inclined guide slot extending upward and tilting forward from bottom to top. When the transmission member moves along the Y-axis, the inclined guide slots of the cover plate are limited and guided by the inner guide pins, allowing for simultaneous horizontal movement and simultaneous lifting. This ensures the synchronization of the horizontal movement and lifting of the cover plate, improves the reliability and precision of the movement, further enhances the smoothness of the horizontal lifting synchronous drive assembly, and improves the degree of internal coordination and efficiency.

[0015] In one embodiment, two inner guide pins are provided at intervals on the inner side surfaces of the left and right transmission arms along the Y-axis, and two corresponding inclined guide slots extending in the same direction are provided at intervals on the two side surfaces of the cover plate along the X-axis. This further improves the synchronization, stability, and coordinated efficiency of the horizontal movement and lifting of the cover plate.

[0016] In one embodiment, two guide shafts extending along the Y-axis are provided on the side of the slider facing the second cylinder. The transmission member is further provided with guide holes extending along the Y-axis at positions corresponding to the guide shafts of the slider. The guide shafts of the slider are inserted into the guide holes of the transmission member. This further improves the synchronization and movement stability of the transmission member, slider, and cover plate.

[0017] In addition, as mentioned above, the test fixture adopts a modular design. The test fixture itself integrates a variety of basic functions such as the positioning of the product to be tested, vacuum adsorption fixation before testing, automatic opening and closing of the cover, automatic fixation during the product testing process, and automatic extension and retraction of the probe. It does not rely on multiple other mechanisms of the automation equipment, has good independence, can be quickly assembled, replaced and repaired, and can adapt to a variety of different test products and different automation equipment. The relevant structures are highly integrated and highly collaborative, which is conducive to miniaturization, improving test efficiency, and improving the reliability and consistency of various basic functions.

[0018] In one embodiment, two second regulating valves are further included, one of which is an air inlet second regulating valve and the other is an air outlet second regulating valve. In this way, the cover plate can be opened and closed and pneumatically controlled.

[0019] According to another aspect of the present invention, the present invention provides a testing method based on a test fixture, characterized by comprising the following steps: Photograph and identify the test points of the product to be tested to form a coordinate system, use the visual identification points on the acupoint carrier as the reference coordinate system to complete the positioning of the product, and place the product on the acupoint carrier of the carrier assembly; The vacuum tube of the first cylinder is used to evacuate the vacuum adsorption holes of the acupoint carrier plate / form negative pressure, so that the product is fixed on the acupoint of the acupoint carrier plate by vacuum adsorption; The cover is driven by the horizontal lifting synchronous drive assembly to move horizontally along the Y axis to the top of the carrier assembly, and then simultaneously descends along the Z axis to press the product to be tested; The first cylinder passes positive air pressure through the first regulating valve, and then pushes the lifting rod upward to lift the probe out of the probe hole and press against the test point of the product for testing; After the test is complete, the cover is driven by the horizontal lift synchronous drive assembly to rise along the Z axis away from the product and simultaneously move horizontally along the Y axis away from the carrier assembly. This improves test efficiency and enhances test reliability and consistency.

[0020] Furthermore, when a product is placed on an acupuncture point carrier, a vacuum meter collects air pressure data from the vacuum adsorption holes of the acupuncture point carrier. If the product is tilted or positioned so that the vacuum adsorption holes cannot form a vacuum and the air pressure value falls below a preset threshold, the vacuum meter outputs an alarm signal. This prevents the cover from forcing pressure on the product and causing damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the overall structure of a test fixture belt product in one embodiment.

[0022] Figure 2 A schematic structural diagram of a carrier plate assembly in one embodiment.

[0023] Figure 3 A schematic structural diagram of the first cylinder assembly in one embodiment.

[0024] Figure 4 A schematic structural diagram of a cover plate in one embodiment.

[0025] Figure 5 A schematic diagram of the structure of a portion of the substrate and the horizontal lifting synchronous drive assembly in one embodiment.

[0026] Figure 6 A schematic structural diagram of a transmission component in one embodiment.

[0027] Figure 7 A schematic structural diagram of a slider and a guide rail in one embodiment. DETAILED DESCRIPTION

[0028] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0029] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "X-axis", "Y-axis", "Z-axis", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0030] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0031] The present invention provides a test fixture, comprising a base plate 1, a carrier plate assembly 2, a first cylinder assembly 3, a horizontal lifting synchronous drive assembly 5 and a cover plate 4.

[0032] The carrier assembly 2 includes a carrier plate 21, an acupuncture point carrier plate 22, and several probes. The acupuncture point carrier plate 22 is located on the carrier plate 21 and is used to place the product 6 to be tested, such as a chip or IC component. The acupuncture point carrier plate 22 has probe holes 23 that match the number, size, and position of the probes. The probes can extend upward or retract downward relative to the probe holes 23. During testing, the probes are driven upward and extended out of the probe holes 23 to press against the test points of the product 6 for testing. After the test, the probes can be retracted into / below the probe holes 23. The distribution of the probes matches the distribution of the test points (i.e., PAD points) of the product 6. The acupuncture point carrier plate 22 is provided with several vacuum suction holes 24. When the product 6 is placed on the acupuncture point carrier plate 22 and is not pressed by the cover plate 4, the negative pressure of the vacuum suction holes 24 firmly fixes the product 6 to the acupuncture points of the acupuncture point carrier plate 22.

[0033] The acupuncture point carrier 22 also has a plurality of visual identification points 25 , which are used to position the product 6 so that the product 6 can be accurately placed in the acupuncture points of the acupuncture point carrier 22 .

[0034] In one embodiment, a vacuum meter is further included to collect air pressure data of the vacuum adsorption holes 24 of the acupoint carrier 22. When the product 6 fails to be tilted or positioned and the vacuum adsorption holes 24 cannot form a vacuum, resulting in the air pressure value being lower than a preset threshold, the vacuum meter outputs an alarm signal.

[0035] The carrier plate assembly 2 is fixedly mounted on one side of the substrate 1. Preferably, the carrier plate 21 assembly is detachably mounted on one side of the substrate 1, so that the carrier plate 21 assembly can be easily replaced according to different product testing needs, so that the test fixture can meet the testing requirements of different products.

[0036] The first cylinder assembly 3 is fixedly disposed on the other side of the base plate 1 at a position opposite to the carrier assembly 2 .

[0037] The first cylinder assembly 3 includes a first cylinder 31, a first regulating valve 32, a vacuum tube 33, and a lifting rod 34. The vacuum tube 33 is connected to the vacuum adsorption hole 24 of the acupoint carrier 22. When the first regulating valve 32 is evacuated, a negative pressure is generated through the vacuum tube 33 and the vacuum adsorption hole 24, which adsorbs and fixes the product 6 to the acupoint of the acupoint carrier 22. The lifting rod 34 is fixedly connected to the piston member in the first cylinder 31. When the first regulating valve 32 is admitted and positive pressure is generated, the piston member and the lifting rod 34 are driven upward, thereby lifting the probe out of the probe hole 23 and then pressing against the test point of the product 6 for testing.

[0038] The carrier assembly 2 further includes a connector 26 for outputting the detection results or other control interactions.

[0039] The cover plate 4 is movably connected to the base plate 1 via a horizontal lifting synchronous drive assembly 5. The cover plate 4 is used to fix the product 6 on the acupuncture point of the acupuncture point carrier 22 for testing. In addition, after the test is completed, the cover plate 4 can be removed from the carrier assembly 2 to facilitate the removal / unloading of the product 6.

[0040] The horizontal lifting synchronous drive assembly 5 is used to drive the cover plate 4 to move horizontally along the Y-axis and simultaneously move along the Z-axis. When closing the cover, the cover plate 4 is driven to move horizontally along the Y-axis to reach above the carrier assembly 2, and simultaneously move downward along the Z-axis to press the product 6. Conversely, when opening the cover, the cover plate 4 is driven to move upward along the Z-axis to move away from the product 6, and simultaneously move horizontally in the opposite direction along the Y-axis away from the carrier assembly 2.

[0041] Specifically, the horizontal lifting synchronous drive assembly 5 includes a second cylinder 51, one or two second regulating valves 52, a piston rod 53, a transmission part 55, a guide rail 56, a slider 57, etc. The main body of the second cylinder 51 is fixedly connected to the substrate 1, and is preferably arranged on the side of the substrate 1 away from the carrier assembly 2. One or two second regulating valves 52 are arranged in the second cylinder 51, preferably with two, one is the second air intake regulating valve 52 and the other is the second air outlet regulating valve 52. The piston rod 53 is connected to the piston of the second cylinder 51 and can move with the piston of the second cylinder 51. The piston rod 53 is extended along the Y-axis. Two guide rails 56 extending along the Y-axis are directly / indirectly fixed on the substrate 1, respectively located on both sides of the piston rod 53. It is preferably symmetrically arranged on both sides of the piston rod 53. The slider 57 is slidably arranged on the two guide rails 56 and can slide along the Y-axis on the guide rails 56. The bottom of the cover plate 4 is provided with a number of columns 41, that is, the columns 41 extend downward from the cover plate 4 along the Z axis. Correspondingly, the slider 57 is provided with a number of axial holes 571 extending along the Z axis. As shown in the figure, the slider 57 has two axial holes 571 on either side of the X axis, for a total of four axial holes 571. Correspondingly, four columns 41 are provided at corresponding positions on the bottom of the cover plate 4. During installation, the columns 41 of the cover plate 4 are inserted into the axial holes 571 of the slider 57 to achieve connection. This connection relationship ensures that the slider 57 and the cover plate 4 are fixed to each other in the Y axis direction and can move synchronously. That is, when the cover plate 4 moves in the Y axis direction, the slider 57 follows the cover plate 4 in the Y axis direction. However, in the Z axis direction, the cover plate 4 and the slider 57 are free to each other, that is, the cover plate 4 can be raised and lowered relative to the slider 57 in the Z axis direction.

[0042] The transmission member 55 comprises a main body extending along the X-axis and transmission arms disposed on either side of the main body, namely a left transmission arm 551A and a right transmission arm 551B. The rod head connection portion 531 of the piston rod 53 of the second cylinder 51 is directly or indirectly fixedly connected to the main body of the transmission member 55, enabling the transmission member 55 to be driven by the piston rod 53 of the second cylinder 51 to move. Preferably, the main body of the transmission member 55 comprises a push block protruding along the Y-axis. The push block has a downward-facing latch that inserts into the rod head connection portion 531 of the piston rod 53 to connect the transmission member 55 to the piston rod 53. The left transmission arm 551A and the right transmission arm 551B extend along the Y-axis. The inner side surfaces of the left transmission arm 551A and the right transmission arm 551B are each provided with an inner guide pin 552. Preferably, two inner guide pins 552 are spaced apart along the Y-axis on the inner side surfaces of the left transmission arm 551A and the right transmission arm 551B. The outer sides of the left and right transmission arms 551A and 551B are each provided with an outer guide pin 553. Correspondingly, vertical plates are spaced apart on either side of the base plate 1 on the carrier assembly 2 along the X-axis, namely, the left and right vertical plates 54A and 54B. The inner sides of the left and right vertical plates 54A and 54B are respectively provided with a left and right slide groove 541A and 541B. The left and right slide grooves 541A and 541B extend along the Y-axis. The positions of the left vertical plate 54A and the right vertical plate 54B and the sizes of the left slide groove 541A and the right slide groove 541B are matched with the outer guide pin 553, so that when the transmission member 55 is driven by the piston rod 53 of the second cylinder 51 to move along the Y-axis, the outer guide pins 553 of the left transmission arm 551A and the right transmission arm 551B are located in the left slide groove 541A / right slide groove 541B, and slide along the left slide groove 541A / right slide groove 541B, thereby limiting and guiding the movement of the transmission member 55.

[0043] Corresponding to the inner guide pins 552 of the left and right transmission arms 551A and 551B, the cover plate 4 is provided with inclined guide slots 42 on both sides thereof in the X-axis direction. The inclined guide slots 42 extend upward and forward from bottom to top, and the number, position, and size of the inclined guide slots 42 match the inner guide pins 552 of the left and right transmission arms 551A and 551B. This ensures that when the transmission member 55 is driven by the piston rod 53 of the second cylinder 51 to move along the Y-axis, the transmission member 55 cannot move up and down, while the cover plate 4 can. Therefore, when the left and right transmission arms 551A and 551B move along the Y-axis, the inner guide pins 552 are located within the inclined guide slots 42. The cover plate 4 is guided by the inclined guide slots 42 and the inner guide pins 552 to achieve horizontal and vertical movement of the cover plate 4. Specifically, when the left and right transmission arms 551A and 551B move along the Y-axis toward the movable carrier assembly 2, they drive the cover plate 4 to move in the Y- and Z-axis directions simultaneously. The cover plate 4 then reaches above the carrier assembly 2 and descends to secure the product 6. Conversely, after testing is complete, the cover plate 4 can move away from the carrier assembly 2 along the Y-axis and simultaneously ascend along the Z-axis, leaving the carrier assembly 2 to facilitate the removal / unloading of the product 6.

[0044] The cover plate 4 has a pressing portion for pressing the product 6. The shape, size and position of the pressing portion are adapted to the carrier assembly 2.

[0045] Optionally, two guide shafts 58 extending along the Y-axis are further provided on the side of the slider 57 facing the second cylinder 51. Guide holes 554 extending along the Y-axis are further provided on the transmission member 55 at positions corresponding to the guide shafts 58 of the slider 57. The guide shafts 58 of the slider 57 are inserted into the guide holes 554 of the transmission member 55 to ensure smoother movement of the cover plate 4 and the horizontal lifting synchronous drive assembly 5.

[0046] In this way, the test fixture is independent of the product's shape. Instead, the loading and unloading mechanism captures and identifies the product's test points (i.e., probe points) to form a coordinate system. This coordinate system is used as a reference for positioning, using the visual markers (i.e., marks) on the product's acupuncture plate as the reference coordinate system. This ensures that large product shape tolerances do not affect contact between the product and the probe, allowing the same fixture to accommodate a variety of product shapes, even of different product types. The acupuncture plate holds the product in place. After the cover is pressed into place, the first cylinder assembly pushes the probe upward from the bottom to contact the product, ensuring that the product's reference remains stationary, maximizing the yield of sensitive tests. This significantly improves test efficiency and reliability. Furthermore, the acupuncture plate features a vacuum suction function, ensuring the product's precise alignment with the acupuncture plate during placement and loading. Furthermore, if the product is tilted, the vacuum gauge quickly outputs an alarm signal, preventing the cover from forcing the product and damaging it.

[0047] Working principle: Photograph and identify the test points of the product to be tested to form a coordinate system, use the visual identification points 25 on the acupoint carrier 22 as the reference coordinate system to complete the positioning of the product, and place the product 6 into the acupoint of the acupoint carrier 22 of the carrier assembly 2; The vacuum tube 33 of the first cylinder 31 evacuates the vacuum adsorption holes 24 of the acupoint carrier 22 to form a negative pressure, so that the product 6 is fixed to the acupoint of the acupoint carrier 22 by vacuum adsorption; When the product is placed on the acupoint carrier, the vacuum meter collects the air pressure data of the vacuum adsorption hole 24 of the acupoint carrier 22. When the product 6 is tilted / positioned and the vacuum adsorption hole 24 cannot form a vacuum, resulting in the air pressure value being lower than the preset threshold, the vacuum meter outputs an alarm signal.

[0048] The second regulating valve 52 of the second cylinder 51 is ventilated, and the piston and piston rod 53 of the second cylinder 51 move along the Y-axis direction. Driven by the piston rod 53, the transmission member 55 as a whole moves along the Y-axis toward the carrier assembly 2; during the movement of the transmission member 55, the outer guide pins 553 of the left transmission arm 551A and the right transmission arm 551B and the left slide groove 541A and the right slide groove 541B on the inner side of the left vertical plate 54A and the right vertical plate 54B are used for limiting and guiding; when the transmission member 55 moves, the cover plate 4 is pushed by the transmission member 55 to move along the Y-axis toward the carrier assembly 2 and simultaneously descend along the Z-axis to reach the carrier assembly 2 and descend to press the product 6. Since the slider 57 is connected to the bottom column 41 of the cover plate 4 through the shaft hole 571, and the slider 57 is slidably set on the guide rail 56, on the one hand, the slider 57 and the cover plate 4 move synchronously in the Y-axis direction, and on the other hand, the cover plate 4 can move up and down relative to the slider 57 through the guidance of the column 41 and the shaft hole 571, thereby improving the overall stability and displacement accuracy of the horizontal and lifting synchronous movement of the cover plate 4.

[0049] Finally, when the cover plate 4 is driven and transmitted by the horizontal lifting synchronous drive assembly 5 and moves along the Y axis and synchronously moves downward along the Z axis to press the product 6, the first cylinder 31 passes positive air pressure through the first regulating valve 32, and then pushes the lifting rod 34 upward to lift the probe out of the probe hole 23 and press the test point of the product 6 for testing.

[0050] On the contrary, after the product 6 is tested, the cover plate 4 moves in the opposite direction under the ventilation drive and transmission action of the horizontal lifting synchronous drive component 5 through another second regulating valve 52, rising along the Z axis and synchronously moving along the Y axis away from the carrier component 2 to thereby realize opening and resetting the cover.

[0051] Those skilled in the art will appreciate that the above embodiments are merely examples, and features of different embodiments may be combined with each other to obtain implementation methods that are easily conceivable based on the disclosure of the present invention but are not explicitly indicated in the drawings.

[0052] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended to be illustrative only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. A test fixture, characterized in that: include: Base and cover plates, and A carrier plate assembly, the carrier plate assembly comprising a carrier plate, an acupuncture point carrier plate located on the carrier plate for placing the product to be tested, and a plurality of probes, wherein the acupuncture point carrier plate has a plurality of probe holes, vacuum adsorption holes, and visual identification points for mutual positioning with the product to be tested; a first cylinder assembly, comprising a first cylinder, a first regulating valve, a vacuum tube, and a lifting rod, wherein one end of the vacuum tube is connected to the first regulating valve, and the other end is connected to the vacuum adsorption hole, so that when the first regulating valve is evacuated, the vacuum adsorption hole can adsorb and fix the product to be tested; the lifting rod is connected to the first cylinder, so that when the first regulating valve is inletted, the lifting rod can be driven to rise, thereby lifting the probe out of the probe hole and pressing against the test point of the product to be tested for testing; A horizontal lifting synchronous drive assembly, the cover plate is connected to the horizontal lifting synchronous drive assembly, and the horizontal lifting synchronous drive assembly can drive the cover plate to synchronously move horizontally and lifting, so that before the test, the cover plate can be driven to move horizontally along the Y axis to reach above the carrier assembly, and synchronously descend along the Z axis to press the product to be tested. After the test is completed, the cover plate can rise along the Z axis to leave the product to be tested and synchronously move horizontally along the Y axis away from the carrier assembly.

2. The test fixture according to claim 1, characterized in that: The carrier assembly is detachably mounted on one side of the base plate, and the first cylinder assembly is fixedly arranged on the other side of the base plate at a position opposite to the carrier assembly.

3. The test fixture according to claim 2, characterized in that: The horizontal lifting synchronous drive assembly also includes a second cylinder, a piston rod and a transmission member, wherein the piston rod is extended along the Y axis and is driven by the second cylinder, the transmission member has a main body extending along the X axis, and a left transmission arm and a right transmission arm are arranged on the left and right sides of the main body, the main body of the transmission member is fixedly connected to the piston rod, the left transmission arm and the right transmission arm are extended along the Y axis, and the outer side surfaces of the left transmission arm and the right transmission arm are respectively provided with outer guide pins; the base plate is provided with a left vertical plate and a right vertical plate at intervals on both sides of the carrier assembly along the X direction, and the inner sides of the left vertical plate and the right vertical plate are respectively provided with a left slide groove and a right slide groove; when the transmission member moves along the Y axis, the outer guide pin is limited and guided by the left slide groove and the right slide groove and slides linearly therein.

4. The test fixture according to claim 3, characterized in that: The horizontal lifting synchronous drive assembly also includes a slider and two guide rails extending along the Y-axis. The guide rails are directly / indirectly fixed on the base plate and are respectively located on both sides of the piston rod; the slider is slidably arranged on the guide rails and can slide along the Y-axis on the guide rails.

5. The test fixture according to claim 4, characterized in that: The cover plate is provided with a plurality of columns, which extend downward from the cover plate along the Z axis; the slider is provided with a plurality of axial holes extending along the Z axis; the cover plate is inserted into the axial holes of the slider through the columns to achieve that the slider and the cover plate are fixed to each other in the Y axis direction and can move synchronously, and in the Z axis direction, the cover plate can be raised and lowered relative to the slider along the Z axis.

6. The test fixture according to claim 5, characterized in that: The inner sides of the left transmission arm and the right transmission arm of the transmission member are respectively provided with inner guide pins, and the two side surfaces of the cover plate in the X-axis direction are correspondingly provided with inclined guide grooves, and the inclined guide grooves extend from bottom to top and forward; when the transmission member moves along the Y-axis, the inclined guide grooves of the cover plate are limited and guided by the inner guide pins and move horizontally while moving up and down synchronously.

7. The test fixture according to claim 6, characterized in that: The inner side surfaces of the left transmission arm and the right transmission arm are respectively provided with two inner guide pins at intervals along the Y-axis direction, and the two side surfaces of the cover plate in the X-axis direction are correspondingly provided with two inclined guide grooves with the same extending direction at intervals.

8. The test fixture according to any one of claims 3 to 7, characterized in that: The slider is further provided with two guide shafts extending along the Y axis on the side facing the second cylinder, and the transmission member is further provided with guide holes extending along the Y axis at positions corresponding to the guide shafts of the slider, and the guide shafts of the slider are inserted into the guide holes of the transmission member.

9. The test fixture according to any one of claims 3 to 7, characterized in that: It also includes two second regulating valves, one of which is an air intake second regulating valve and the other is an air outlet second regulating valve.

10. A test method based on a test fixture, characterized in that: The following steps are involved: Photograph and identify the test points of the product to be tested to form a coordinate system, use the visual identification points on the acupoint carrier as the reference coordinate system to complete the positioning of the product, and place the product on the acupoint carrier of the carrier assembly; The vacuum tube of the first cylinder is used to evacuate the vacuum adsorption holes of the acupoint carrier plate / form negative pressure, so that the product is fixed on the acupoint of the acupoint carrier plate by vacuum adsorption; The cover is driven by the horizontal lifting synchronous drive assembly to move horizontally along the Y axis to the top of the carrier assembly, and then simultaneously descends along the Z axis to press the product to be tested; The first cylinder passes positive air pressure through the first regulating valve, and then pushes the lifting rod upward to lift the probe out of the probe hole and press against the test point of the product for testing; After the test is completed, the cover is driven by the horizontal lifting synchronous drive assembly to rise along the Z axis away from the product and synchronously move horizontally along the Y axis away from the carrier assembly.

11. The test method based on the test fixture according to claim 10, characterized in that: It also includes the following: when the product is placed on the acupoint of the acupoint carrier, the vacuum meter collects the air pressure data of the vacuum adsorption hole of the acupoint carrier; when the product is tilted / positioned and the vacuum adsorption hole cannot form a vacuum, causing the air pressure value to be lower than the preset threshold, the vacuum meter outputs an alarm signal.

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