Circuit board function test equipment

Abstract

The utility model discloses and provides circuit board function test equipment, which has the advantages of stable structure, simplicity and convenience in operation, accuracy in test and the like, not only improves the test efficiency and simplifies the operation process, but also greatly enhances the protection on products to be tested and meets the actual requirements of circuit board manufacturing enterprises. The device comprises a rack module, an upper pressing plate module, a carrier plate module and a needle block module, the upper pressing plate module and the needle block module are fixedly matched in the rack module, a plurality of to-be-tested products are limited and matched on the carrier plate module, the carrier plate module is in floating fit on the needle block module, and the needle block module is arranged on the upper pressing plate module. The upper pressing plate module moves downwards to be in limiting fit with the carrier plate module, and the multiple to-be-tested products are matched with the needle block module. The device is applied to the field of product testing.

Description

TECHNICAL FIELD

[0001] The utility model is applied to product test field, especially relates to a circuit board function test equipment BACKGROUND

[0002] In the circuit board manufacturing industry, functional testing of products is a key link to ensure product quality. However, the existing circuit board functional test equipment has many deficiencies. For example, some equipment has low testing efficiency and cannot quickly and accurately complete the testing task of a large number of circuit boards; some other equipment has a complex structure and is difficult to operate, which increases the testing burden and error rate of the testing personnel. In addition, some equipment lacks adequate protection measures for the products under test during the testing process, which can easily cause damage to the products.

[0003] Therefore, based on the above problems, if a circuit board functional test equipment can be designed, which needs to have the advantages of stable structure, simple operation, accurate testing, etc., not only improves the testing efficiency and simplifies the operation process, but also greatly enhances the protection of the products under test, meets the actual needs of circuit board manufacturing enterprises, and can well solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem of overcoming the deficiency of the prior art and designs a circuit board functional test equipment, which needs to have the advantages of stable structure, simple operation, accurate testing, etc., not only improves the testing efficiency and simplifies the operation process, but also greatly enhances the protection of the products under test, meets the actual needs of circuit board manufacturing enterprises.

[0005] The utility model adopts the technical scheme: the utility model discloses a rack module, upper pressing plate module, carrier plate module and needle block module, the upper pressing plate module with needle block module is fixedly cooperated in the rack module, and a plurality of products under test are limitedly cooperated on the carrier plate module, and the carrier plate module is floatingly cooperated on the needle block module, and the upper pressing plate module is downwardly moved and is limitedly cooperated with the carrier plate module, and a plurality of products under test are cooperated with the needle block module.

[0006] Further, the upper pressing plate module is provided with a code scanning gun, the carrier plate module is provided with a plurality of two-dimensional code blocks, and the code scanning gun is cooperated with the two-dimensional code blocks.

[0007] Further, the upper pressing plate module comprises a top plate, two vertical plates, a pressing plate element, a plurality of first floating assemblies and a first floating plate, upper and lower ends of the two vertical plates are fixedly matched with the top plate and the pressing plate element respectively, the top plate is fixedly matched on the rack module, the pressing plate element is uniformly provided with a plurality of product acupoints on the upper surface, the product acupoints are provided with temperature detection assemblies, the first floating plate is floatingly matched with the pressing plate element through the plurality of first floating assemblies, the two sides of the first floating assembly are limitingly matched with the pressing plate element and the first floating plate respectively, a plurality of floating plate positioning pins are arranged on the bottom surface of the first floating plate, and the floating plate positioning pins are limitingly matched with the carrier plate module.

[0008] Further, the carrier plate module comprises a cover plate element and a carrier plate element, a plurality of products to be tested are limitingly matched on the carrier plate element, the carrier plate element is uniformly provided with a plurality of first magnets, a plurality of cover plate positioning pins, a plurality of first carrier plate guide sleeves and a plurality of second carrier plate guide sleeves, the first carrier plate guide sleeves are limitingly matched with the floating plate positioning pins, the cover plate element is uniformly provided with a plurality of second magnets and a plurality of cover plate guide sleeves, the second magnets are matched with the first magnets, and the cover plate element is limitingly matched with the cover plate positioning pins through the cover plate guide sleeves.

[0009] Further, the first floating assembly comprises a first guide column, a first linear bearing and a first spring, the first linear bearing is fixedly matched on the pressing plate element, the first guide column is slidingly matched in the first linear bearing, one end of the first guide column is fixedly matched on the first floating plate, the other end of the first guide column is limitingly matched with the first linear bearing, and the two ends of the first spring are limitingly matched with the top surface of the first floating plate and the bottom surface of the pressing plate element respectively.

[0010] Further, the needle block module comprises a needle block base, a laser assembly, a plurality of needle block assemblies, a second floating assembly and a second floating plate, the needle block base is fixedly matched on the rack module, the plurality of needle block assemblies and the laser assembly are uniformly fixedly matched on the needle block base, the needle block base is further provided with a plurality of height limiting columns and a plurality of base positioning pins, the base positioning pins are limitingly matched with the second floating plate, the height limiting columns are limitingly matched with the carrier plate module, the needle block assemblies are matched with the products to be tested, the laser assembly is matched with the carrier plate module, the second floating plate is floatingly matched on the needle block base through the second floating assembly, and the second floating plate is provided with a carrier plate limiting assembly, and the carrier plate limiting assembly is limitingly matched with the carrier plate module.

[0011] Further, the laser assembly comprises a laser sensor, a sensor fixing seat and a sensor fixing seat, the laser sensor and the sensor fixing seat are arranged in the sensor fixing seat, the laser sensor is limitedly matched on the sensor fixing seat, and the sensor fixing seat and the sensor fixing seat are fixedly matched on the needle block base.

[0012] Further, the needle block assembly comprises an upper needle block, a plurality of probes, a tail needle block and an adapter plate, the plurality of probes are slidingly matched in the tail needle block and the upper needle block, one end of the plurality of probes is matched with the adapter plate, and the upper needle block is limitedly matched on the needle block base.

[0013] Further, the second floating assembly comprises a second guide column, a second linear bearing, a second spring and an equal-height screw, the second linear bearing is fixedly matched on the needle block base, the second guide column is slidingly matched in the second linear bearing, one end of the second guide column is fixedly matched on the second floating plate, the threaded end of the equal-height screw is fixedly matched on the needle block base, the stepped end of the equal-height screw is limitedly matched with the second floating plate, and the two ends of the second spring are limitedly matched with the top surface of the second floating plate and the bottom surface of the needle block base.

[0014] Further, the carrier plate limiting assembly comprises a plurality of Y-axis coarse positioning blocks, a plurality of X-axis coarse positioning blocks, a plurality of coarse positioning pins and a plurality of fine positioning pins, the plurality of Y-axis coarse positioning blocks and the plurality of X-axis coarse positioning blocks are limitedly matched with the periphery of the carrier plate element respectively, and the plurality of coarse positioning pins and the plurality of fine positioning pins are limitedly matched with a plurality of second carrier plate guide sleeves on the carrier plate element. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural view of the utility model;

[0016] Figure 2 is an exploded structural view of the upper pressing plate module, the carrier plate module and the needle block module;

[0017] Figure 3 is an exploded structural view of the upper pressing plate module;

[0018] Figure 4 is an exploded structural view of the carrier plate module;

[0019] Figure 5 is a structural view of the carrier plate element;

[0020] Figure 6 is an exploded structural view of the needle block module;

[0021] Figure 7 is an exploded structural view of the needle block assembly;

[0022] Figure 8 is Figure 6 A local enlarged structural view of the middle. DETAILED DESCRIPTION

[0023] As Figures 1-2 shown in the embodiment, the utility model includes frame module 1, upper pressing plate module 2, carrier plate module 3 and needle block module 4, the upper pressing plate module 2 and the needle block module 4 are all fixedly matched in the frame module 1, a plurality of products to be measured 5 are limitingly matched on the carrier plate module 3, the carrier plate module 3 is floatingly matched on the needle block module 4, the upper pressing plate module 2 moves downward and is limitingly matched with the carrier plate module 3, and a plurality of the products to be measured 5 are matched with the needle block module 4. It can be seen that the frame module 1 plays a supporting and fixing role for the upper pressing plate module 2 and the needle block module 4, the needle block module 4 plays a supporting and limiting role for the carrier plate module 3, the carrier plate module 3 plays a supporting and limiting role for a plurality of the products to be measured 5, the upper pressing plate module 2 moves downward and is limitingly matched with the carrier plate module 3, and a plurality of the products to be measured 5 are matched with the needle block module 4, that is, the products to be measured 5 are tested.

[0024] As Figure 3 and Figure 5 shown in the embodiment, the upper pressing plate module 2 is provided with a code scanning gun 6, the carrier plate module 3 is provided with a plurality of two-dimensional code blocks 7, and the code scanning gun 6 is matched with the two-dimensional code blocks 7. It can be seen that the upper pressing plate module 2 plays a supporting and fixing role for the code scanning gun 6, the carrier plate module 3 plays a supporting and fixing role for a plurality of the two-dimensional code blocks 7, the two-dimensional code blocks 7 are provided with the code information of the carrier plate element 31, and the code scanning gun 6 is matched with the two-dimensional code blocks 7, so that the carrier plate element 31 can be input into an external computer, playing a role of facilitating the tracing of the test data.

[0025] As Figure 3As shown, in the embodiment, the upper pressing plate module 2 comprises a top plate 20, two vertical plates 21, a pressing plate element 22, a plurality of first floating assemblies and a first floating plate 23, the upper and lower ends of the two vertical plates 21 are fixedly matched with the top plate 20 and the pressing plate element 22 respectively, the top plate 20 is fixedly matched on the rack module 1, the pressing plate element 22 is uniformly provided with a plurality of product acupoints on the upper surface, the product acupoints are provided with temperature detection assemblies 24, the first floating plate 23 is floatingly matched with the pressing plate element 22 through a plurality of first floating assemblies, the two sides of the first floating assembly are limitingly matched with the pressing plate element 22 and the first floating plate 23 respectively, a plurality of floating plate positioning pins 25 are arranged on the bottom surface of the first floating plate 23, and the floating plate positioning pins 25 are limitingly matched with the carrier plate module 3. Therefore, the rack module 1 supports and fixes the top plate 20, the two vertical plates 21 connect and fix the top plate 20 and the pressing plate element 22, the pressing plate element 22 supports and fixes the plurality of temperature detection assemblies 24, the temperature detection assemblies 24 monitor the ambient temperature around the products to be tested, the plurality of first floating assemblies floatingly match the first floating plate 23 with the pressing plate element 22, so that when the pressing plate element 22 drives the first floating plate 23 to move downward, the first floating assemblies can absorb part of the downward pressure, thereby avoiding damage to the carrier plate module 3 and the plurality of products to be tested 5, meanwhile, the first floating assemblies also limit the first floating plate 23 to adaptively match with the carrier plate module 3, the first floating plate 23 supports and fixes the plurality of floating plate positioning pins 25, and the floating plate positioning pins 25 guide and limit the first floating plate 23 when matched with the carrier plate module 3.

[0026] As Figure 4 and Figure 5As shown, in the embodiment, the carrier plate module 3 comprises a cover plate element 30 and a carrier plate element 31, a plurality of to-be-tested products 5 are limited and matched on the carrier plate element 31, the carrier plate element 31 is uniformly provided with a plurality of first magnets 310, a plurality of cover plate positioning pins 311, a plurality of first carrier plate guide sleeves 312 and a plurality of second carrier plate guide sleeves 313, the first carrier plate guide sleeves 312 are limited and matched with the floating plate positioning pins 25, the cover plate element 30 is uniformly provided with a plurality of second magnets 300 and a plurality of cover plate guide sleeves 301, the second magnets 300 are matched with the first magnets 310, and the cover plate element 30 is limited and matched with the cover plate positioning pins 311 through the cover plate guide sleeves 301. As can be seen, the carrier plate element 31 plays a supporting and fixing role for a plurality of the to-be-tested products 5, a plurality of the first magnets 310, a plurality of the cover plate positioning pins 311, a plurality of the first carrier plate guide sleeves 312 and a plurality of the second carrier plate guide sleeves 313, the first carrier plate guide sleeves 312 play a limiting and guiding role with the floating plate positioning pins 25 on the ground of the first floating plate 23, the second carrier plate guide sleeves 313 play a limiting and guiding role with the carrier plate positioning pins 49 on the needle block module 4, the cover plate element 30 plays a supporting and limiting role for a plurality of the second magnets 300 and a plurality of the cover plate guide sleeves 301, a plurality of the first magnets 310 and a plurality of the second magnets 300 play a limiting and matching role for the cover plate element 30 and the carrier plate element 31, the cover plate positioning pins 311 and the cover plate guide sleeves 301 also play a limiting and matching role for the cover plate element 30 and the carrier plate element 31, and the first magnets 310, the second magnets 300, the cover plate positioning pins 311 and the cover plate guide sleeves 301 make the cover plate element 30 play a role of being convenient to replace and disassemble.

[0027] As Figure 3As shown, in the embodiment, the first floating assembly comprises a first guide column 26, a first linear bearing 27 and a first spring 28, the first linear bearing 27 is fixedly fitted on the pressing plate element 22, the first guide column 26 is slidingly fitted in the first linear bearing 27, one end of the first guide column 26 is fixedly fitted on the first floating plate 23, the other end of the first guide column 26 is limitingly fitted with the first linear bearing 27, and two ends of the first spring 28 are respectively limitingly fitted with the top surface of the first floating plate 23 and the bottom surface of the pressing plate element 22. Thus, the pressing plate element 22 plays a supporting and fixing role for the first linear bearing 27, the first linear bearing 27 plays a guiding and limiting role for the up and down sliding of the first guide column 26, the first guide column 26 plays a role of connecting the first floating plate 23 and the pressing plate element 22, and at the same time, plays a role of sliding the first floating plate 23 up and down on the pressing plate element 22, when the first floating plate 23 moves downward and is limitingly fitted with the carrier plate element 31, the first spring 28 plays a role of absorbing part of the downward pressure, avoiding damage to the carrier plate module 3 and the plurality of to-be-tested products 5, and at the same time, the first spring 28 also makes the first floating plate 23 play a role of self-adapting and being limitingly fitted with the carrier plate module 3.

[0028] As Figure 6As shown, in the embodiment, the needle block module 4 comprises a needle block base 40, a laser assembly, a plurality of needle block assemblies 8, a second floating assembly and a second floating plate 41, the needle block base 40 is fixedly fitted on the rack module 1, the needle block base 40 is uniformly fixedly fitted on the needle block base 40, the needle block base 40 is further provided with a plurality of height limiting columns 42 and a plurality of base positioning pins 43, the base positioning pins 43 are limitingly fitted with the second floating plate 41, the height limiting columns 42 are limitingly fitted with the carrier plate module 3, the needle block assemblies 8 are fitted with the products to be tested 5, the laser assembly is fitted with the carrier plate module 3, the second floating plate 41 is floatingly fitted on the needle block base 40 through the second floating assembly, the second floating plate 41 is provided with a carrier plate limiting assembly, and the carrier plate limiting assembly is limitingly fitted with the carrier plate module 3. As can be seen, the needle block base 40 supports and fixes the needle block assemblies 8, the laser assembly, a plurality of height limiting columns 42, a plurality of base positioning pins 43 and the second floating assembly, the needle block assemblies 8 detect and test a plurality of products to be tested 5, the laser assembly monitors whether the cover plate element 30 and the carrier plate element 31 are buckled flat, prevents the products to be tested 5 from being crushed, the height limiting columns 42 limit the height when the first floating plate 23 of the upper pressing plate module 2 moves downward, the base positioning pins 43 limit the second floating plate 41, so that the second floating plate 41 is limitingly fitted on the needle block base 40, the second floating assembly floats and supports the second floating plate 41 on the needle block base 40, so that the height of the second floating plate 41 is higher than that of the needle block assemblies 8, avoiding the second floating plate 41 from being scratched by the needle block assemblies 8 when placing and limiting the carrier plate module 3, thereby protecting the products to be tested 5 and the needle block assemblies 8, at the same time, the second floating assembly can absorb the downward pressure of the upper pressing plate module 2, avoiding damaging the products to be tested 5 and the needle block assemblies 8, the second floating plate 41 supports and fixes the carrier plate limiting assembly, and the carrier plate limiting assembly limits and positions the carrier plate module 3.

[0029] As Figure 8As shown in the figure, in the embodiment, the laser assembly comprises a laser sensor 44, a sensor fixing seat 45 and a sensor protection cover 46, the laser sensor 44 and the sensor fixing seat 45 are arranged in the sensor protection cover 46, the laser sensor 44 is limitedly matched on the sensor fixing seat 45, and the sensor fixing seat 45 and the sensor protection cover 46 are fixedly matched on the needle block base 40. Thus, it can be seen that the sensor fixing seat 45 supports and fixes the laser sensor 44, the laser sensor 44 monitors whether the cover plate element 30 and the carrier plate element 31 are buckled flat, prevents the product to be tested 5 from being crushed, and the sensor protection cover 46 protects the laser sensor 44.

[0030] As shown in the figure, Figure 7 As shown in the figure, in the embodiment, the needle block assembly 8 comprises an upper needle block 80, a plurality of probes 81, a tail needle block 82 and an adapter plate 83, the plurality of probes 81 are slidingly matched in the tail needle block 82 and the upper needle block 80, one end of the plurality of probes 81 is matched with the adapter plate 83, and the upper needle block 80 is limitedly matched on the needle block base 40. Thus, it can be seen that the upper needle block 80 limits and guides the plurality of probes 81, the tail needle block 82 supports and fixes the plurality of probes 81, prevents the plurality of probes 81 from being separated, the adapter plate 83 collects and transmits the test signals of the plurality of probes 81, and the upper needle block 80 also protects the plurality of probes 81, the tail needle block 82 and the adapter plate 83.

[0031] As shown in the figure, Figure 6As shown in the embodiment, the second floating assembly comprises a second guide column 90, a second linear bearing 91, a second spring 92 and a high screw 93, the second linear bearing 91 is fixedly matched on the needle block base 40, the second guide column 90 is slidingly matched in the second linear bearing 91, one end of the second guide column 90 is fixedly matched on the second floating plate 41, the threaded end of the high screw 93 is fixedly matched on the needle block base 40, the stepped end of the high screw 93 is limitingly matched with the second floating plate 41, and the two ends of the second spring 92 are limitingly matched with the top surface of the second floating plate 41 and the bottom surface of the needle block base 40 respectively. Therefore, the needle block base 40 supports and fixes the second linear bearing 91 and the high screw 93, the second linear bearing 91 guides and limits the up-down sliding of the second guide column 90, the second guide column 90 connects the second floating plate 41 and the needle block base 40, and the high screw 93 limits the up-down sliding of the second floating plate 41, when the first floating plate 23 moves downwards and is limitingly matched with the carrier plate element 31, the carrier plate element 31 is limitingly matched on the second floating plate 41, and the second spring 92 absorbs part of the downward impact force, so that the to-be-tested product 5 does not directly contact the needle block assembly 8, thereby preventing the to-be-tested product 5 from being damaged.

[0032] As Figure 6 As shown in the embodiment, the carrier plate limiting assembly comprises a plurality of Y-axis coarse positioning blocks 47, a plurality of X-axis coarse positioning blocks 48 and a plurality of carrier plate positioning pins 49, the plurality of Y-axis coarse positioning blocks 47 and the plurality of X-axis coarse positioning blocks 48 are limitingly matched with the periphery of the carrier plate element 31 respectively, and the plurality of carrier plate positioning pins 49 are limitingly matched with a plurality of second carrier plate guide sleeves 313 on the carrier plate element 31. Therefore, the Y-axis coarse positioning block 47 and the X-axis coarse positioning block 48 respectively horizontally limit the periphery of the carrier plate element 31, the carrier plate positioning pin 49 is limitingly matched with the second carrier plate guide sleeve 313, and the carrier plate module 3 is limitingly matched with the second floating plate 41, thereby being positioned and guided, so that the carrier plate module 3 is convenient to replace and disassemble.

[0033] In the embodiment, the working principle of the utility model is as follows:

[0034] As Figures 1-8As shown, several said to be measured products 5 are put into the carrier plate element 31, and are combined into a whole with the cover plate element 30 buckling, the carrier plate module 3 is put on the second floating plate 41 on the needle plate module 3, the carrier plate limiting assembly on the second floating plate 41 is limited to cooperate with the carrier plate module 3, the test button on the rack module 1 is pressed down, the upper pressing plate module 2 pushes the first floating plate 23 to press down, after the pressing down is completed, the test is started, after the test is completed, the upper pressing plate module 2 is lifted, the carrier plate module 3 is manually taken out, the cover plate element 30 is opened, and the tested product is taken out, and the cycle is sequentially repeated.

[0035] Although the embodiments of the utility model are described in actual schemes, but do not constitute the limitation to the meaning of the utility model, for the person skilled in the art, according to the modification of the embodiments thereof and the combination with other schemes, it is obvious.

Claims

1. A circuit board functional test apparatus, characterized by comprising: It includes rack module (1), upper pressing plate module (2), carrier plate module (3) and needle block module (4), the upper pressing plate module (2) and the needle block module (4) are fixedly matched in the rack module (1), a plurality of products to be tested (5) are limitingly matched on the carrier plate module (3), the carrier plate module (3) is floatingly matched on the needle block module (4), the upper pressing plate module (2) is limitingly matched with the carrier plate module (3) by moving downward, and a plurality of the products to be tested (5) are matched with the needle block module (4).

2. The circuit board functional test apparatus according to claim 1, characterized by: The upper pressing plate module (2) is provided with a code scanning gun (6), and the carrier plate module (3) is provided with a plurality of two-dimensional code blocks (7), and the code scanning gun (6) is matched with the two-dimensional code blocks (7).

3. The circuit board functional test apparatus of claim 1, wherein: The upper pressing plate module (2) includes a top plate (20), two vertical plates (21), a pressing plate element (22), a plurality of first floating assemblies and a first floating plate (23), the upper and lower ends of the two vertical plates (21) are respectively fixedly matched with the top plate (20) and the pressing plate element (22), the top plate (20) is fixedly matched on the rack module (1), the pressing plate element (22) is uniformly provided with a plurality of product acupoints, the product acupoints are provided with temperature detection assemblies (24), the first floating plate (23) is floatingly matched with the pressing plate element (22) through a plurality of first floating assemblies, the two sides of the first floating assembly are limitingly matched with the pressing plate element (22) and the first floating plate (23), and a plurality of floating plate positioning pins (25) are arranged on the bottom surface of the first floating plate (23), and the floating plate positioning pins (25) are limitingly matched with the carrier plate module (3).

4. The circuit board functional test apparatus of claim 3, wherein: The carrier plate module (3) includes a cover plate element (30) and a carrier plate element (31), a plurality of products to be tested (5) are limitingly matched on the carrier plate element (31), the carrier plate element (31) is uniformly provided with a plurality of first magnets (310), a plurality of cover plate positioning pins (311), a plurality of first carrier plate guide sleeves (312) and a plurality of second carrier plate guide sleeves (313), the first carrier plate guide sleeve (312) is limitingly matched with the floating plate positioning pin (25), the cover plate element (30) is uniformly provided with a plurality of second magnets (300) and a plurality of cover plate guide sleeves (301), the second magnet (300) is matched with the first magnet (310), and the cover plate element (30) is limitingly matched with the cover plate positioning pin (311) through the cover plate guide sleeve (301).

5. The circuit board functional test apparatus of claim 3, wherein: The first floating assembly comprises a first guide column (26), a first linear bearing (27) and a first spring (28), the first linear bearing (27) is fixedly fitted on the pressing plate element (22), the first guide column (26) is slidingly fitted in the first linear bearing (27), one end of the first guide column (26) is fixedly fitted on the first floating plate (23), the other end of the first guide column (26) is limitingly fitted with the first linear bearing (27), and the two ends of the first spring (28) are limitingly fitted with the top surface of the first floating plate (23) and the bottom surface of the pressing plate element (22) respectively.

6. The circuit board functional test apparatus of claim 4, wherein: The needle block module (4) comprises a needle block base (40), a laser assembly, a plurality of needle block assemblies (8), a second floating assembly and a second floating plate (41), the needle block base (40) is fixedly fitted on the rack module (1), the plurality of needle block assemblies (8) and the laser assembly are uniformly fixedly fitted on the needle block base (40), a plurality of height limiting columns (42) and a plurality of base positioning pins (43) are further arranged on the needle block base (40), the base positioning pins (43) are limitingly fitted with the second floating plate (41), the height limiting columns (42) are limitingly fitted with the carrier plate module (3), the needle block assemblies (8) are fitted with the product to be tested (5), the laser assembly is fitted with the carrier plate module (3), the second floating plate (41) is floatingly fitted on the needle block base (40) through the second floating assembly, and a carrier plate limiting assembly is arranged on the second floating plate (41) and limitingly fitted with the carrier plate module (3).

7. A circuit board functional test apparatus according to claim 6, wherein: The laser assembly comprises a laser sensor (44), a sensor fixing seat (45) and a sensor protection cover (46), the laser sensor (44) and the sensor fixing seat (45) are arranged in the sensor protection cover (46), the laser sensor (44) is limitingly fitted on the sensor fixing seat (45), and the sensor fixing seat (45) and the sensor protection cover (46) are fixedly fitted on the needle block base (40).

8. The circuit board functional test apparatus of claim 6, wherein: The needle block assembly (8) comprises an upper needle block (80), a plurality of probes (81), a tail needle block (82) and an adapter plate (83), the plurality of probes (81) are slidingly fitted in the tail needle block (82) and the upper needle block (80), one end of the plurality of probes (81) is fitted with the adapter plate (83), and the upper needle block (80) is limitingly fitted on the needle block base (40).

9. The circuit board functional test apparatus of claim 6, wherein: The second floating assembly comprises a second guide column (90), a second linear bearing (91), a second spring (92) and a leveling screw (93), the second linear bearing (91) is fixedly connected to the needle block base (40), the second guide column (90) is slidingly connected to the second linear bearing (91), one end of the second guide column (90) is fixedly connected to the second floating plate (41), the threaded end of the leveling screw (93) is fixedly connected to the needle block base (40), the stepped end of the leveling screw (93) is limitedly connected to the second floating plate (41), and the two ends of the second spring (92) are respectively limitedly connected to the top surface of the second floating plate (41) and the bottom surface of the needle block base (40).

10. The circuit board functional test apparatus of claim 6, wherein: The carrier plate limiting assembly comprises a plurality of Y-axis coarse positioning blocks (47), a plurality of X-axis coarse positioning blocks (48) and a plurality of carrier plate positioning pins (49), the plurality of Y-axis coarse positioning blocks (47) and the plurality of X-axis coarse positioning blocks (48) are respectively limitedly connected to the periphery of the carrier plate element (31), and the plurality of carrier plate positioning pins (49) are limitedly connected to a plurality of second carrier plate guide sleeves (313) on the carrier plate element (31).

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