A fixture for verifying electrical stress of SPI FLASH chips

Abstract

The present invention relates to the field of chip testing technology, and in particular to a fixture for verifying the electrical stress of an SPIFLASH chip. The fixture comprises a PCB board and a clamping table; a rotatable support rod is provided at the lower end of the clamping table, and a clamping assembly and a support frame are provided at the upper end; the clamping assembly comprises an adjusting member and a clamping member; the clamping members are arranged on both sides of the clamping table in a mirror-image manner, and the spacing between the clamping members on both sides is adjusted by the adjusting member; the support frame is arranged at the rear side of the clamping table and is located between the clamping members on both sides, and a dust removal member is provided on the support frame. The present invention sets a clamping assembly to fix the PCB board, thereby improving the convenience and stability of electrical stress verification of the SPIFLASH chip. At the same time, the PCB board is easy to install and disassemble, and is easy to replace, thereby meeting the demand for electrical stress verification of different SPIFLASH chips.

Description

Technical Field

[0001] The present invention relates to the technical field of chip testing, and in particular to a fixture for verifying the electrical stress of an SPI FLASH chip. Background Art

[0002] Electrical stress is the ratio of the voltage in an application to the component's specification. Generally, voltage stress should not exceed 90% during design. Voltage stress is a key component in studying the electrical characteristics generated during high-voltage direct current transmission. To ensure that SPIFLASH chips function properly under unstable power supplies, they must be verified under varying electrical stress conditions.

[0003] Chinese patent application CN 215417543 U discloses a fixture for verifying the electrical stress of SPI FLASH chips. This fixture primarily improves the PCB structure, but ignores the impact of PCB position changes on verification results. PCB displacement and looseness can cause test instability and reduce tester efficiency. Summary of the Invention

[0004] To address the challenges presented in the prior art, a fixture for verifying the electrical stress of SPI FLASH chips is proposed. This invention incorporates a clamping assembly to secure the printed circuit board (PCB), improving the convenience and stability of electrical stress verification of SPI FLASH chips. Furthermore, the PCB is easily installed and removed, allowing for easy replacement, thus enabling electrical stress verification of different SPI FLASH chips.

[0005] The present invention proposes a fixture for verifying the electrical stress of an SPI FLASH chip, comprising a PCB and a clamping platform; a rotatable support rod is provided at the lower end of the clamping platform, and a clamping assembly and a support frame are provided at the upper end; the clamping assembly comprises an adjusting member and a clamping member; the clamping members are arranged in mirror images on both sides of the clamping platform, and the spacing between the clamping members on both sides is adjusted by the adjusting member; the support frame is arranged at the rear side of the clamping platform and located between the clamping members on both sides, and a dust removal member is provided on the support frame. The clamping member comprises a clamping frame; the clamping frame is an inverted L-shaped structure, with a vertical section slidingly arranged on the clamping platform and a horizontal section provided with an adjusting rod that can move up and down; a pull ring is provided at the top of the adjusting rod, and a clamping plate is provided at the bottom; a downward pressure spring is provided between the clamping plate and the horizontal section of the clamping frame. The adjusting part includes a lifting plate; a mounting groove is provided on the clamping table; a threaded rod is provided in the middle of the mounting groove, and sliding frames are provided at both ends; the upper end of the threaded rod extends into the mounting groove and is rotatably connected to the clamping table, the middle end is threadedly connected to the lifting plate, and the bottom extends out of the clamping table and is connected to the knob; the two ends of the lifting plate pass through the sliding frames on the corresponding sides respectively and rise and fall above them; the sliding frame slides in the mounting groove in the horizontal direction, and a connecting block is provided at the upper end; the connecting block extends out of the mounting groove and is connected to the vertical section of the clamping frame.

[0006] Preferably, two groups of clamping assemblies are provided, which are arranged in parallel on the front and rear ends of the clamping platform.

[0007] Preferably, a clamping strip is provided at the bottom of the clamping plate.

[0008] Preferably, the sliding frame is a frame structure; the lifting plate moves up and down in the frame.

[0009] Preferably, lower anti-skid teeth are provided at the bottom of the frame of the sliding frame; upper anti-skid teeth are provided at the bottom of the lifting plate; and the lower anti-skid teeth and the upper anti-skid teeth are positioned opposite to each other.

[0010] Preferably, a mounting sleeve is provided at the bottom of the clamping platform; the mounting sleeve is provided between the two sets of knobs; the upper end of the support rod extends into the mounting sleeve and is rotatably connected thereto, and a locking piece is provided at the same time, and a support seat is provided at the lower end.

[0011] Preferably, the locking part includes a locking head and a reset spring; a circle of equally spaced locking grooves is provided on the inner wall of the mounting sleeve; locking holes corresponding to the locking grooves are provided on the support rod; the reset spring is provided in the locking hole; the locking head is slidably provided on the orifice of the locking hole and is connected to the reset spring at the same time.

[0012] Preferably, the head of the engaging head is configured to be hemispherical; and the shape of the groove body of the engaging groove matches that of the engaging head.

[0013] Preferably, the dust removal component includes a dust removal cylinder; the dust removal cylinder is arranged on a support frame, with both ends open, an exhaust fan arranged at the front end, and a filter element arranged at the rear side.

[0014] Preferably, filter screens are provided on the front and rear end openings of the dust collector.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] First, the present invention provides a clamping assembly that controls the tension of a sliding frame by rotating a knob. When the sliding frame is loose, the clamping frame secures the PCB. When the sliding frame is fixed, the clamping frame's position is also fixed. By securing the PCB, the convenience and stability of electrical stress testing of SPI FLASH chips are improved. Furthermore, the PCB is easily installed and removed, making it easy to replace, thus meeting the requirements for electrical stress testing of different SPI FLASH chips.

[0017] Second, the present invention incorporates a locking mechanism. Rotating the mounting sleeve releases the locking head from the slot. A return spring engages the next slot, achieving desired PCB angle adjustment. This allows for simple operation while limiting the rotational flexibility of the clamping platform, preventing it from rotating easily.

[0018] 3. The present invention is provided with a dust removal component, and smoke and dust are filtered and discharged through the filter core and filter screen, thereby reducing environmental pollution and facilitating the operation of the electrical stress verification equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of an embodiment of the present invention;

[0021] Figure 3 for Figure 2 A partial enlarged view of

[0022] Figure 4 Schematic diagram of the structure of the engaging member;

[0023] Figure 5 It is a structural diagram of the dust removal component.

[0024] Figure numerals: 1, PCB board; 2, clamping table; 3, support rod; 4, support seat; 5, clamping assembly; 6, support frame; 7, dust removal part; 8, lifting plate; 9, threaded rod; 10, sliding frame; 11, connecting block; 12, clamping frame; 13, clamping plate; 14, adjusting rod; 15, pull ring; 16, downward pressure spring; 17, clamping strip; 18, upper anti-slip teeth; 19, lower anti-slip teeth; 20, mounting groove; 21, dust removal cylinder; 22, exhaust fan; 23, filter element; 24, filter screen; 25, mounting sleeve; 26, slot; 27, snap head; 28, reset spring. DETAILED DESCRIPTION

[0025] Example 1

[0026] like Figure 1-3As shown, the present invention proposes a fixture for verifying the electrical stress of an SPI FLASH chip, comprising a PCB board 1 and a clamping platform 2; an SPI FLASH chip pin holder is provided on the PCB board 1 for electrical stress verification; a rotatable support rod 3 is provided at the lower end of the clamping platform 2, and a clamping assembly 5 and a support frame 6 are provided at the upper end; the clamping assembly 5 comprises an adjusting member and a clamping member; the clamping members are mirror-imaged and arranged on both sides of the clamping platform 2, and the spacing between the clamping members on both sides is adjusted by the adjusting member; the support frame 6 is arranged at the rear side of the clamping platform 2 and located between the clamping members on both sides, and a dust removal member 7 is provided on the support frame 6. The clamping member comprises a clamping frame 12; the clamping frame 12 is an inverted L-shaped structure, with a vertical section slidingly arranged on the clamping platform 2 and a horizontal section provided with an adjusting rod 14 that can move up and down; a pull ring 15 is provided at the top of the adjusting rod 14, and a clamping plate 13 is provided at the bottom; a downward pressure spring 16 is provided between the clamping plate 13 and the horizontal section of the clamping frame 12. The adjusting part includes a lifting plate 8; a mounting groove 20 is provided on the clamping table 2; a threaded rod 9 is provided in the middle of the mounting groove 20, and sliding frames 10 are provided at both ends; the upper end of the threaded rod 9 extends into the mounting groove 20 and is rotatably connected to the clamping table 2, the middle end is threadedly connected to the lifting plate 8, and the bottom extends out of the clamping table 2 and is connected to the knob; the two ends of the lifting plate 8 respectively pass through the sliding frames 10 on the corresponding sides and rise and fall above them; the sliding frame 10 slides in the mounting groove 20 in the horizontal direction, and a connecting block 11 is provided at the upper end; the connecting block 11 extends out of the mounting groove 20 and is connected to the vertical section of the clamping frame 12.

[0027] The working principle of this embodiment is as follows: When performing electrical stress verification of the SPI FLASH chip, place the PCB board 1 at the center of the clamping table 2. Rotate the knob to move the lifting plate 8 upward and loosen the sliding frame 10. Insert your finger into the pull ring 15 to move the clamping plate 13 upward. At the same time, pull the clamping frame 12 until the vertical section of the clamping frame 12 contacts both sides of the PCB board 1. Release your finger and press down on the spring 16 to push the clamping plate 13 downward, pressing the upper edge of the PCB board 1. Then rotate the knob in the opposite direction, which, through the rotation of the threaded rod 9, drives the lifting plate 8 downward, pressing the sliding frame 10 and fixing the position of the clamping frame 12. After completing the positioning of the PCB board 1, solder the SPI FLASH chip to the pin holder, connect the circuit, and start the verification experiment with the electrical stress verification equipment. During the verification process, the clamping table 2 can be rotated to adjust the operating angle and position. Operate the dust removal component 7 to remove the smoke generated by welding. Throughout the entire process, PCB 1 remains fixed in position and adjustable in angle, improving the convenience and stability of electrical stress testing for SPI FLASH chips. PCB 1 is also easy to install and remove, making it easy to replace, enabling electrical stress testing for different SPI FLASH chips.

[0028] Example 2

[0029] like Figure 1-3As shown, the present invention proposes a fixture for verifying the electrical stress of an SPI FLASH chip, comprising a PCB board 1 and a clamping platform 2; an SPI FLASH chip pin holder is provided on the PCB board 1 for electrical stress verification; a rotatable support rod 3 is provided at the lower end of the clamping platform 2, and a clamping assembly 5 and a support frame 6 are provided at the upper end; the clamping assembly 5 comprises an adjusting member and a clamping member; the clamping members are mirror-imaged and arranged on both sides of the clamping platform 2, and the spacing between the clamping members on both sides is adjusted by the adjusting member; the support frame 6 is arranged at the rear side of the clamping platform 2 and located between the clamping members on both sides, and a dust removal member 7 is provided on the support frame 6. The clamping member comprises a clamping frame 12; the clamping frame 12 is an inverted L-shaped structure, with a vertical section slidingly arranged on the clamping platform 2 and a horizontal section provided with an adjusting rod 14 that can move up and down; a pull ring 15 is provided at the top of the adjusting rod 14, and a clamping plate 13 is provided at the bottom; a downward pressure spring 16 is provided between the clamping plate 13 and the horizontal section of the clamping frame 12. The adjusting part includes a lifting plate 8; a mounting groove 20 is provided on the clamping table 2; a threaded rod 9 is provided in the middle of the mounting groove 20, and sliding frames 10 are provided at both ends; the upper end of the threaded rod 9 extends into the mounting groove 20 and is rotatably connected to the clamping table 2, the middle end is threadedly connected to the lifting plate 8, and the bottom extends out of the clamping table 2 and is connected to the knob; the two ends of the lifting plate 8 respectively pass through the sliding frames 10 on the corresponding sides and rise and fall above them; the sliding frame 10 slides in the mounting groove 20 in the horizontal direction, and a connecting block 11 is provided at the upper end; the connecting block 11 extends out of the mounting groove 20 and is connected to the vertical section of the clamping frame 12.

[0030] Furthermore, two sets of clamping assemblies 5 are provided, arranged in parallel at the front and rear ends of the clamping platform 2. The two sets of clamping assemblies 5 operate independently, respectively clamping the head and tail of the PCB board 1. This segmented clamping method meets the requirements for securing PCB boards 1 of different sizes and shapes.

[0031] Furthermore, a clamping strip 17 is provided at the bottom of the clamping plate 13. The clamping strip 17 has anti-slip and protective effects.

[0032] Furthermore, the sliding frame 10 is a frame structure; the lifting plate 8 moves up and down in the frame, and the movement trajectory is stable, while the movement of the sliding frame 10 is unobstructed.

[0033] Furthermore, lower anti-slip teeth 19 are provided on the bottom of the frame of the sliding frame 10, and upper anti-slip teeth 18 are provided on the bottom of the lifting plate 8. The lower anti-slip teeth 19 and the upper anti-slip teeth 18 are positioned opposite each other. When the sliding frame 10 moves horizontally to the desired position, the lifting plate 8 descends, and the lower anti-slip teeth 19 engage with the upper anti-slip teeth 18, thereby further securing the sliding frame 10 and improving the stability of the clamping frame 12.

[0034] Example 3

[0035] like Figure 1-3As shown, the present invention proposes a fixture for verifying the electrical stress of an SPI FLASH chip, comprising a PCB board 1 and a clamping platform 2; an SPI FLASH chip pin holder is provided on the PCB board 1 for electrical stress verification; a rotatable support rod 3 is provided at the lower end of the clamping platform 2, and a clamping assembly 5 and a support frame 6 are provided at the upper end; the clamping assembly 5 comprises an adjusting member and a clamping member; the clamping members are mirror-imaged and arranged on both sides of the clamping platform 2, and the spacing between the clamping members on both sides is adjusted by the adjusting member; the support frame 6 is arranged at the rear side of the clamping platform 2 and located between the clamping members on both sides, and a dust removal member 7 is provided on the support frame 6. The clamping member comprises a clamping frame 12; the clamping frame 12 is an inverted L-shaped structure, with a vertical section slidingly arranged on the clamping platform 2 and a horizontal section provided with an adjusting rod 14 that can move up and down; a pull ring 15 is provided at the top of the adjusting rod 14, and a clamping plate 13 is provided at the bottom; a downward pressure spring 16 is provided between the clamping plate 13 and the horizontal section of the clamping frame 12. The adjusting part includes a lifting plate 8; a mounting groove 20 is provided on the clamping table 2; a threaded rod 9 is provided in the middle of the mounting groove 20, and sliding frames 10 are provided at both ends; the upper end of the threaded rod 9 extends into the mounting groove 20 and is rotatably connected to the clamping table 2, the middle end is threadedly connected to the lifting plate 8, and the bottom extends out of the clamping table 2 and is connected to the knob; the two ends of the lifting plate 8 respectively pass through the sliding frames 10 on the corresponding sides and rise and fall above them; the sliding frame 10 slides in the mounting groove 20 in the horizontal direction, and a connecting block 11 is provided at the upper end; the connecting block 11 extends out of the mounting groove 20 and is connected to the vertical section of the clamping frame 12.

[0036] Furthermore, two sets of clamping assemblies 5 are provided, arranged in parallel at the front and rear ends of the clamping platform 2. The two sets of clamping assemblies 5 operate independently, respectively clamping the head and tail of the PCB board 1. This segmented clamping method meets the requirements for securing PCB boards 1 of different sizes and shapes.

[0037] Furthermore, a clamping strip 17 is provided at the bottom of the clamping plate 13. The clamping strip 17 has anti-slip and protective effects.

[0038] Furthermore, the sliding frame 10 is a frame structure; the lifting plate 8 moves up and down in the frame, and the movement trajectory is stable, while the movement of the sliding frame 10 is unobstructed.

[0039] Furthermore, lower anti-slip teeth 19 are provided on the bottom of the frame of the sliding frame 10, and upper anti-slip teeth 18 are provided on the bottom of the lifting plate 8. The lower anti-slip teeth 19 and the upper anti-slip teeth 18 are positioned opposite each other. When the sliding frame 10 moves horizontally to the desired position, the lifting plate 8 descends, and the lower anti-slip teeth 19 engage with the upper anti-slip teeth 18, thereby further securing the sliding frame 10 and improving the stability of the clamping frame 12.

[0040] like Figure 4As shown, the bottom of the clamping platform 2 is provided with a mounting sleeve 25, which is positioned between the two sets of knobs. The upper end of the support rod 3 extends into the mounting sleeve 25, rotatably connected thereto, and is provided with a locking member. The lower end is provided with a support base 4. The locking member includes a locking head 27 and a return spring 28. The inner wall of the mounting sleeve 25 is provided with a circle of equally spaced locking grooves 26. The support rod 3 is provided with locking holes that correspond one-to-one with the locking grooves 26. The return spring 28 is positioned within the locking hole. The locking head 27 slides over the opening of the locking hole and is connected to the return spring 28.

[0041] Furthermore, the head of the engaging head 27 is configured to be hemispherical; the shape of the groove body of the engaging groove 26 is consistent with that of the engaging head 27 .

[0042] In this embodiment, the specific structure of the engaging member is configured such that when the clamping platform 2 is rotated, the mounting sleeve 25 rotates synchronously. The engaging head 27 is unscrewed from the retaining slot 26. As the mounting sleeve 25 rotates, it engages with the next retaining slot 26 under the action of the return spring 28. As the clamping platform 2 continues to rotate, the engaging head 27 repeats the above process until the desired angle of the clamping platform 2 is achieved. This makes angle adjustment simple and also limits the rotational flexibility of the clamping platform 2, preventing it from rotating easily.

[0043] Example 4

[0044] like Figure 1-3 As shown, the present invention proposes a fixture for verifying the electrical stress of an SPI FLASH chip, comprising a PCB board 1 and a clamping platform 2; an SPI FLASH chip pin holder is provided on the PCB board 1 for electrical stress verification; a rotatable support rod 3 is provided at the lower end of the clamping platform 2, and a clamping assembly 5 and a support frame 6 are provided at the upper end; the clamping assembly 5 comprises an adjusting member and a clamping member; the clamping members are mirror-imaged and arranged on both sides of the clamping platform 2, and the spacing between the clamping members on both sides is adjusted by the adjusting member; the support frame 6 is arranged at the rear side of the clamping platform 2 and located between the clamping members on both sides, and a dust removal member 7 is provided on the support frame 6. The clamping member comprises a clamping frame 12; the clamping frame 12 is an inverted L-shaped structure, with a vertical section slidingly arranged on the clamping platform 2 and a horizontal section provided with an adjusting rod 14 that can move up and down; a pull ring 15 is provided at the top of the adjusting rod 14, and a clamping plate 13 is provided at the bottom; a downward pressure spring 16 is provided between the clamping plate 13 and the horizontal section of the clamping frame 12. The adjusting part includes a lifting plate 8; a mounting groove 20 is provided on the clamping table 2; a threaded rod 9 is provided in the middle of the mounting groove 20, and sliding frames 10 are provided at both ends; the upper end of the threaded rod 9 extends into the mounting groove 20 and is rotatably connected to the clamping table 2, the middle end is threadedly connected to the lifting plate 8, and the bottom extends out of the clamping table 2 and is connected to the knob; the two ends of the lifting plate 8 respectively pass through the sliding frames 10 on the corresponding sides and rise and fall above them; the sliding frame 10 slides in the mounting groove 20 in the horizontal direction, and a connecting block 11 is provided at the upper end; the connecting block 11 extends out of the mounting groove 20 and is connected to the vertical section of the clamping frame 12.

[0045] Furthermore, two sets of clamping assemblies 5 are provided, arranged in parallel at the front and rear ends of the clamping platform 2. The two sets of clamping assemblies 5 operate independently, respectively clamping the head and tail of the PCB board 1. This segmented clamping method meets the requirements for securing PCB boards 1 of different sizes and shapes.

[0046] Furthermore, a clamping strip 17 is provided at the bottom of the clamping plate 13. The clamping strip 17 has anti-slip and protective effects.

[0047] Furthermore, the sliding frame 10 is a frame structure; the lifting plate 8 moves up and down in the frame, and the movement trajectory is stable, while the movement of the sliding frame 10 is unobstructed.

[0048] Furthermore, lower anti-slip teeth 19 are provided on the bottom of the frame of the sliding frame 10, and upper anti-slip teeth 18 are provided on the bottom of the lifting plate 8. The lower anti-slip teeth 19 and the upper anti-slip teeth 18 are positioned opposite each other. When the sliding frame 10 moves horizontally to the desired position, the lifting plate 8 descends, and the lower anti-slip teeth 19 engage with the upper anti-slip teeth 18, thereby further securing the sliding frame 10 and improving the stability of the clamping frame 12.

[0049] like Figure 4 As shown, the bottom of the clamping platform 2 is provided with a mounting sleeve 25, which is positioned between the two sets of knobs. The upper end of the support rod 3 extends into the mounting sleeve 25, rotatably connected thereto, and is provided with a locking member. The lower end is provided with a support base 4. The locking member includes a locking head 27 and a return spring 28. The inner wall of the mounting sleeve 25 is provided with a circle of equally spaced locking grooves 26. The support rod 3 is provided with locking holes that correspond one-to-one with the locking grooves 26. The return spring 28 is positioned within the locking hole. The locking head 27 slides over the opening of the locking hole and is connected to the return spring 28.

[0050] Furthermore, the head of the engaging head 27 is configured to be hemispherical; the shape of the groove body of the engaging groove 26 is consistent with that of the engaging head 27 .

[0051] like Figure 5 As shown, the dust removal component 7 includes a dust removal cylinder 21; the dust removal cylinder 21 is set on the support frame 6, with both ends open, an exhaust fan 22 set at the front end, and a filter element 23 set at the rear side.

[0052] Furthermore, filter screens 24 are provided on the front and rear end openings of the dust removal cylinder 21 .

[0053] In this embodiment, the dust removal member 7 is provided with a specific structure, and the exhaust fan 22 is started during welding. The smoke and dust are filtered and discharged through the filter core 23 and the filter screen 24, thereby reducing environmental pollution and facilitating the operation of the electrical stress verification equipment.

[0054] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A fixture for verifying the electrical stress of a SPIFLASH chip, characterized in that: The invention comprises a PCB board (1) and a clamping platform (2); a rotatable support rod (3) is provided at the lower end of the clamping platform (2), and a clamping assembly (5) and a support frame (6) are provided at the upper end; the clamping assembly (5) comprises an adjusting member and a clamping member; the clamping members are arranged on both sides of the clamping platform (2) in a mirror-image manner, and the distance between the clamping members on both sides is adjusted by the adjusting member; the support frame (6) is arranged at the rear side of the clamping platform (2) and is located between the clamping members on both sides, and a dust removal member (7) is provided on the support frame (6); The clamping member includes a clamping frame (12); the clamping frame (12) is an inverted L-shaped structure, the vertical section is slidably arranged on the clamping platform (2), and the horizontal section is provided with an adjustment rod (14) that can move up and down; a pull ring (15) is provided on the top of the adjustment rod (14), and a clamping plate (13) is provided on the bottom; a downward pressure spring (16) is provided between the clamping plate (13) and the horizontal section of the clamping frame (12); The adjusting member comprises a lifting plate (8); a mounting groove (20) is provided on the clamping platform (2); a threaded rod (9) is provided in the middle of the mounting groove (20), and sliding frames (10) are provided at both ends; the upper end of the threaded rod (9) extends into the mounting groove (20) and is rotatably connected to the clamping platform (2), the middle end is threadedly connected to the lifting plate (8), and the bottom extends out of the clamping platform (2) and is connected to the knob; the two ends of the lifting plate (8) respectively pass through the sliding frames (10) on the corresponding sides and are lifted and lowered above them; the sliding frame (10) slides in the mounting groove (20) in the horizontal direction, and a connecting block (11) is provided at the upper end; the connecting block (11) extends out of the mounting groove (20) and is connected to the vertical section of the clamping frame (12).

2. A fixture for verifying electrical stress of a SPIFLASH chip according to claim 1, characterized in that: Two groups of clamping components (5) are provided and arranged in parallel on the front and rear ends of the clamping platform (2).

3. A fixture for verifying electrical stress of a SPIFLASH chip according to claim 1, characterized in that: A clamping strip (17) is provided at the bottom of the clamping plate (13).

4. A fixture for verifying electrical stress of a SPIFLASH chip according to claim 1, characterized in that: The sliding frame (10) is a frame structure; the lifting plate (8) moves up and down in the frame.

5. A fixture for verifying electrical stress of a SPIFLASH chip according to claim 4, characterized in that: The bottom of the sliding frame (10) is provided with lower anti-skid teeth (19); the bottom of the lifting plate (8) is provided with upper anti-skid teeth (18); the lower anti-skid teeth (19) and the upper anti-skid teeth (18) are positioned opposite to each other.

6. A fixture for verifying electrical stress of a SPIFLASH chip according to claim 1, characterized in that: A mounting sleeve (25) is provided at the bottom of the clamping platform (2); the mounting sleeve (25) is provided between the two sets of knobs; the upper end of the support rod (3) extends into the mounting sleeve (25) and is rotatably connected thereto, and a locking piece is provided at the same time, and a support seat (4) is provided at the lower end.

7. A fixture for verifying electrical stress of a SPIFLASH chip according to claim 6, characterized in that: The engaging member comprises an engaging head (27) and a return spring (28); a circle of equally spaced engaging grooves (26) is provided on the inner wall of the mounting sleeve (25); engaging holes corresponding to the engaging grooves (26) are provided on the support rod (3); the return spring (28) is provided in the engaging hole; the engaging head (27) is slidably provided on the opening of the engaging hole and is connected to the return spring (28).

8. A fixture for verifying electrical stress of a SPIFLASH chip according to claim 7, characterized in that: The head of the engaging head (27) is set to be hemispherical; the shape of the groove body of the engaging groove (26) is consistent with that of the engaging head (27).

9. A fixture for verifying electrical stress of a SPIFLASH chip according to claim 1, characterized in that: The dust removal component (7) includes a dust removal cylinder (21); the dust removal cylinder (21) is arranged on the support frame (6), with both ends open, an exhaust fan (22) arranged at the front end, and a filter element (23) arranged at the rear side.

10. A fixture for verifying electrical stress of a SPIFLASH chip according to claim 9, characterized in that: Filter screens (24) are provided on the front and rear end openings of the dust removal cylinder (21).

Images