Test fixture

Abstract

The present application discloses a test fixture, which relates to the field of server testing technology and includes a main body and a blowing assembly. The main body has a slot for inserting a workpiece to be tested. The main body is provided with a first air hole connected to the slot. The blowing assembly includes a blowing member and a baffle. The blowing member is provided on the main body. The blowing member has an air cavity containing gas. During or after the workpiece is removed from the slot, the baffle is movably provided on the blowing member along a first direction and has a connecting position. In the connecting position, the air cavity is connected to the first air hole to blow air into the slot. Since the blowing assembly can blow air into the slot after the workpiece is tested, dust in the slot is blown out, thereby cleaning the slot and avoiding the problem of dust accumulation in the slot causing poor contact of the main body's contacts, thereby ensuring the accuracy of the test results for the workpiece. Therefore, the technical problem of dust accumulation in the slot can be solved, and the technical effect of cleaning the slot can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of server testing, and in particular to a testing fixture. Background Art

[0002] Before installing a server, PCIe cards need to be tested for performance. The card is inserted into a PCIe slot on a test fixture, where the card's gold fingers make electrical contact with the slot's contacts. The test system, connected to the test fixture, then begins testing the card. However, dust can easily enter the slot during insertion, and dust accumulation can lead to poor contact, affecting signal transmission and, consequently, test results. Summary of the Invention

[0003] The present application provides a test fixture to at least solve the problem in the related art that dust is brought into the slot during the insertion of a PCIe card into the slot, causing the slot to be prone to dust accumulation.

[0004] The present application provides a test fixture, including a body and a blowing assembly, the body having a slot, the slot being open on at least one side in a first direction for inserting a workpiece to be tested, the body being provided with a first air hole connected to the slot, the blowing assembly including a blowing member and a baffle, the blowing member being provided on the body, the blowing member having an air cavity containing gas, the baffle being movably provided on the blowing member along the first direction during or after the workpiece is separated from the slot, and the baffle having a connecting position, in which the air cavity is connected to the first air hole to blow air into the slot.

[0005] Through this application, the blowing assembly can blow air into the slot after the workpiece is tested, thereby blowing out the dust in the slot, achieving slot cleaning, avoiding the problem of dust accumulation in the slot causing poor contact of the main body, and ensuring the accuracy of the test results for the workpiece. Therefore, the technical problem of dust accumulation in the slot can be solved, and the technical effect of cleaning the slot can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0007] Figure 1 A schematic diagram of the structure of a test fixture provided in an embodiment of the present application;

[0008] Figure 2 A schematic diagram of a partial structure of a test fixture provided in an embodiment of the present application;

[0009] Figure 3 A schematic structural diagram of a test fixture body, a blowing assembly, a pull rod, and a workpiece provided in an embodiment of the present application;

[0010] Figure 4 A schematic cross-sectional view of a main body and a blowing assembly of a test fixture provided in an embodiment of the present application, wherein the baffle is in an initial position;

[0011] Figure 5 A schematic structural diagram of a test fixture body, a connection assembly, and a blowing assembly provided in an embodiment of the present application, wherein the baffle is in an initial position;

[0012] Figure 6 A schematic structural diagram of a test fixture body, connection assembly, air box, and baffle provided in an embodiment of the present application;

[0013] Figure 7 for Figure 5 A partial enlarged view of point E in the middle;

[0014] Figure 8 A schematic structural diagram of a dustproof component of a test fixture provided in an embodiment of the present application.

[0015] The above drawings include the following reference numerals:

[0016] 100. Test fixture;

[0017] 1. Main body, 11. Slot, 12. First air hole, 121. First direction group, 122. Second direction group, 13. Slide, 14. Cover, 15. Main body, 16. Support portion;

[0018] 2. Blowing assembly, 21. Blowing member, 211. Air cavity, 212. Air box, 2121. Third air hole, 2122. Give way groove, 213. Push plate, 214. One-way air inlet valve, 215. Pushing member, 2151. First push rod, 21511. First guide surface, 21512. First plane, 2152. Second push rod, 21521. Second guide surface, 21522. Second plane, 22. Baffle, 221. Second air hole, 2211. First connecting group, 2212. Second connecting group, 222. Accommodating groove;

[0019] 3. Moving assembly, 31. Moving end, 32. Vertical pole, 33. Mounting plate, 34. Micro motor, 35. Lead screw, 36. Sliding plate, 37. Clamping claw, 38. Guide rod;

[0020] 4. Connecting assembly, 41. Pressing plate, 42. Pulling rope, 43. Auxiliary rod, 44. Telescopic rod, 441. Outer rod, 4411. Movable groove, 442. Inner rod, 4421. Avoidance surface, 443. Elastic member, 45. Matching plate, 46. Auxiliary block;

[0021] 5. Pull rod;

[0022] 6. Dustproof assembly, 61. Telescopic member, 62. Dustproof plate, 63. Fixed plate, 64. Adsorption plate;

[0023] 200. Workpiece. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] It should be noted that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely for ease of description and simplification of the present application. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present application. The terms "mounted," "connected," and "connected" should be interpreted broadly, and may include, for example, fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. The terms "parallel," "perpendicular," and "equal" encompass the described conditions and conditions similar to the described conditions, provided that the range of the similar conditions is within an acceptable range of deviation, as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes both absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism may be, for example, within 5°; "perpendicular" includes both absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity may also be, for example, within 5°. "Equal" includes both absolute equality and approximate equality, where the acceptable deviation range for approximate equality may be, for example, that the difference between the two is less than or equal to 5% of either. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0026] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0027] The embodiments of the present application provide a test fixture, and the test fixture is described in detail in combination with its structure and working principle.

[0028] like Figures 1 to 3 As shown, the test fixture 100 of the embodiment of the present invention includes a body 1 and a blowing assembly 2. The body 1 has a slot 11, and the slot 11 is at least in a first direction (eg Figure 1The main body 1 is provided with a first air hole 12 connected to the slot 11. The blowing assembly 2 includes a blowing member 21 and a baffle 22. The blowing member 21 is provided on the main body 1. The blowing member 21 has an air cavity 211 containing gas. During the process of the workpiece 200 to be tested being separated from the slot 11 or after being separated from the slot 11, the baffle 22 is movably provided on the blowing member 21 along the first direction and the baffle 22 has a connecting position. In the connecting position, the air cavity 211 is connected to the first air hole 12 to blow air into the slot 11. In the non-connecting position, the air cavity 211 is disconnected from the first air hole 12, that is, the air cavity 211 is not connected to the slot 11, and the first air hole 12 does not blow air into the slot 11.

[0029] After the main body 1 completes the test of the workpiece 200, the workpiece 200 is pulled out of the slot 11 of the main body 1. During the process of the workpiece 200 being separated from the slot 11 of the main body 1 or after being separated from the slot 11 of the main body 1, the baffle 22 moves along the first direction to the connecting position, so that the air cavity 211 of the blowing member 21 is connected with the first air hole 12, and the blowing member 21 blows air into the slot 11, thereby blowing out the dust in the slot 11 and cleaning the slot 11.

[0030] Therefore, the test fixture 100 of the embodiment of the present invention blows air to clean the slot 11 after the workpiece 200 is tested, thereby avoiding the problem of dust accumulation in the slot 11 causing poor contact of the contacts of the main body 1, and ensuring the accuracy of the test results of the workpiece 200.

[0031] Specifically, such as Figure 2 and Figure 3 As shown, the body 1 is provided with first air holes 12 and blowing components 2 on both sides of the slot 11 in the width direction.

[0032] In some embodiments, as Figure 4 and Figure 5 As shown, the baffle 22 is provided with a second air hole 221. In this connected position, the air cavity 211 is connected to the first air hole 12 through the second air hole 221. As the baffle 22 moves along the first direction, the second air hole 221 moves synchronously. When the baffle 22 moves to the connected position, the second air hole 221 connects the first air hole 12 and the air cavity 211. The gas in the air cavity 211 flows from the second air hole 221 to the first air hole 12, and then blows from the first air hole 12 to the slot 11. When the baffle 22 moves to the disconnected position, the second air hole 221 is disconnected from the first air hole 12 and / or the air cavity 211, and the air cavity 211 is disconnected from the first air hole 12.

[0033] In this connecting position, the baffle 22 connects the air cavity 211 and the first air cavity 12 by setting the second air cavity 221. The second air cavity 221 forms a closed connecting path, ensuring the sealing of the connection between the air cavity 211 and the first air cavity 12, ensuring the stability of the airflow from the air cavity 211 to the first air cavity 12, reducing the airflow loss and pressure drop caused by the airflow from the air cavity 211 to the first air cavity 12, and ensuring the speed and flow of the airflow when blowing from the first air cavity 12 to the slot 11, thereby ensuring the dust blowing effect on the slot 11, and then ensuring the cleaning effect of the test fixture 100 of the embodiment of the present invention on the slot.

[0034] In some embodiments, as Figures 3 to 5 As shown, there are multiple first air holes 12, and there are multiple second air holes 221, which correspond one-to-one with the first air holes 12. The main body 1 is provided with multiple first air holes 12, and different first air holes 12 are not connected to each other. Different first air holes 12 face different specific positions of the slot 11, and thus, the gas blown out from the first air holes 12 rushes to different specific positions of the slot 11. Therefore, the main body 1 is provided with multiple first air holes 12 to blow air at different positions in the slot 11, which can fully blow air into the slot 11, avoiding the existence of cleaning dead corners, and is conducive to further improving the dust blowing effect on the slot 11, thereby improving the cleaning effect of the test fixture 100 of the embodiment of the present invention on the slot.

[0035] In some embodiments, the plurality of first air holes 12 are divided into at least two groups and include a first direction group 121 and a second direction group 122. The first air holes 12 in the first direction group 121 extend in a direction away from the baffle 22 and are inclined toward the other side of the slot 11 in the first direction. The first air holes 12 in the second direction group 122 extend in a direction away from the baffle 22 and are inclined toward the opening of the slot 11. The second direction group 122 is located on the side of the first direction group 121 away from the opening of the slot 11. Figure 4 As shown, the second direction group 122 is located on the B side of the first direction group 121 in the first direction. The plurality of second air holes 221 are divided into at least two groups and include a first connected group 2211 and a second connected group 2212. The first connected group 2211 corresponds to the first direction group 121, and the second connected group 2212 corresponds to the second direction group 122.

[0036] In this embodiment, if Figure 3 and Figure 4As shown, slot 11 has an opening on one side (side A) in the first direction. The other side (side B) of slot 11 in the first direction forms a slot bottom. Contacts (not shown) are provided at the slot bottom for connection to workpiece 200 to be tested. The first air holes 12 of first-direction group 121 face the contacts, while the first air holes 12 of second-direction group 122 face the opening of slot 11. Second-direction group 122 is located on the side of first-direction group 121 adjacent to the contacts. Therefore, when the first air holes 12 blow air into slot 11, first-direction group 121 blows toward the contacts at the bottom of slot 11, creating an airflow toward the bottom of slot 11, lifting dust from the bottom and contacts and separating it from the bottom of slot 11. Second-direction group 122 blows toward the opening of slot 11, creating an airflow outward from slot 11, thereby blowing dust outward and ensuring dust is blown out of slot 11. This further improves the cleaning effect of slot 11 and enhances the cleaning effect of the test fixture 100 according to the present embodiment.

[0037] The baffle 22 also has an initial position and a final position. The baffle 22 is movable between the initial position and the final position along the first direction. The communication position is located between the initial position and the final position. Figure 4 As shown, in the initial position, the distance between the second air holes 221 of the first communication group 2211 and the first air holes 12 of the first direction group 121 is smaller than the distance between the second air holes 221 of the second communication group 2212 and the first air holes 12 of the second direction group 122. During or after the workpiece 200 is released from the slot 11, the baffle 22 moves along the first direction from the initial position to the final position, passing through the communication position. Because at this initial position, the distance between the second air hole 221 of the first connecting group 2211 and the first air hole 12 of the first direction group 121 is smaller than the distance between the second air hole 221 of the second connecting group 2212 and the first air hole 12 of the second direction group 122, then, when passing through this connecting position in the process of moving from the initial position to the final position, the second air hole 221 of the first connecting group 2211 is first connected with the first air hole 12 of the first direction group 121 to form an airflow toward the bottom of the slot 11 and the contact, and then the second air hole 221 of the second connecting group 2212 is connected with the second air hole 221 of the second direction group 122 to form an airflow toward the opening of the slot 11. Therefore, in this connected position, air is first blown toward the contact at the bottom of the slot 11 to blow up the dust from the bottom of the slot 11, and then air is blown toward the opening of the slot 11 to form an airflow toward the outside of the slot 11, which is conducive to blowing the blown dust out of the slot 11, ensuring that the dust is blown out of the slot 11, further improving the dust blowing effect on the slot 11, and further improving the cleaning effect of the test fixture 100 of the embodiment of the present invention on the slot.

[0038] In some embodiments, the connection position includes a first connection position and a second connection position. At the first connection position, the first air hole 12 of the first direction group 121 and the second air hole 221 of the first connection group 2211 are connected, and the first air hole 12 of the second direction group 122 and the second air hole 221 of the second connection group 2212 are disconnected. At the second connection position, the first air hole 12 of the first direction group 121 and the second air hole 221 of the first connection group 2211 are disconnected, and the first air hole 12 of the second direction group 122 and the second air hole 221 of the second connection group 2212 are connected. In the process of moving the baffle 22 from the initial position to the final position, it first reaches the first connection position and then reaches the second connection position, so that the airflow blowing toward the bottom of the slot 11 and the airflow blowing toward the opening of the slot 11 are carried out separately without direct interference, thereby ensuring that the speed and flow of the airflow blown toward the bottom of the slot 11 by the first direction group 121 are not affected, thereby ensuring that the dust at the bottom of the slot 11 is blown up, and ensuring that the speed and flow of the airflow blown toward the opening of the slot 11 by the second direction group 122 are not affected, thereby ensuring that the dust is blown out of the slot 11 as a whole, further improving the dust blowing effect on the slot 11, and further improving the cleaning effect of the test fixture 100 of the embodiment of the present invention on the slot.

[0039] Specifically, such as Figure 1 and Figure 2 As shown, the body 1 includes a main body portion 15 and a support portion 16, which are connected to each other. The support portion 16 forms support for the main body portion 15 in the upper and lower directions. A slot 11 is provided on the main body portion 15, and the main body portion 15 is used to insert the workpiece 200 to be tested.

[0040] Further, such as Figure 1 and Figure 2 As shown, the test fixture 100 according to the embodiment of the present invention further includes a moving assembly 3. The moving assembly 3 has a moving end 31 that moves along the first direction between an insertion position and a disengagement position. The moving end 31 is used to mount a workpiece 200 to be tested, such that the workpiece 200 is inserted into the slot 11 in the insertion position and is spaced apart from the slot 11 in the disengagement position. The moving end 31 is connected to the baffle 22 so that the moving end 31 drives the baffle 22 to move along the first direction.

[0041] When testing a workpiece 200, the workpiece is first mounted on the movable end 31 of the movable assembly 3. The movable end 31 then moves the workpiece from the disengaged position to the engaged position, allowing the workpiece to engage with the slot 11. The workpiece is then tested. After the test is complete, the movable end 31 removes the workpiece from the slot 11 and moves it to the disengaged position. During or after the workpiece is disengaged from the slot 11, the movable end 31 moves the baffle 22 along the first direction from the initial position to the final position.

[0042] The test fixture 100 of the embodiment of the present invention drives the workpiece 200 to be inserted and removed from the slot 11 through the moving component 3. During the removal process, the moving component 3 drives the baffle 22 to move so that the baffle 22 passes through the connection position, thereby controlling the blowing member 21 to blow air into the slot 11. As a result, the test fixture 100 of the embodiment of the present invention not only realizes the insertion and removal process of the workpiece 200 through the moving component 3, but also completes the movement of the baffle 22 from the initial position to the final position during the workpiece removal process. This ensures the synchronization of the movement of the baffle 22 and the removal process of the workpiece 200, ensures the timeliness of the blowing into the slot 11, increases the function of the moving component 3 in the test fixture 100 of the embodiment of the present invention, and can eliminate the need for a separate drive component to move the baffle 22 from the initial position to the final position. It also eliminates the need for the drive component and the moving end 31 to control the linkage between the insertion and removal process of the workpiece 200, which helps reduce the equipment cost of the test fixture 100 of the embodiment of the present invention.

[0043] Furthermore, the disengaged position includes a first disengaged position and a second disengaged position. The second disengaged position is located between the first disengaged position and the engaged position. In the second disengaged position, the workpiece 200 is disengaged from the slot 11 and is adjacent to the opening of the slot 11. After the movable end 31 drives the workpiece 200 out of the slot 11 and moves from the second disengaged position to the first disengaged position, the movable end 31 drives the baffle 22 to move in the first direction. In other words, during the movement of the workpiece 200 after it is disengaged from the slot 11, the movable end 31 drives the baffle 22 from the initial position to the final position. That is, after the workpiece 200 is removed from the slot 11, the movable end 31 drives the baffle 22 to move through the connected position during the movement. In this connected position, the blowing member 21 blows air into the slot 11. Thus, the test fixture 100 according to the present invention performs air blowing to remove dust from the slot 11 after the workpiece 200 is removed, preventing the airflow and dust from being blocked by the workpiece 200 during the blowing process, thereby affecting the blowing effect.

[0044] In some embodiments, as Figures 3 to 5 As shown, the blowing member 21 includes an air box 212, a push plate 213, a one-way air inlet valve 214 and a push member 215. The air box 212 is provided on the body 1, and the push plate 213 is movably provided in the air box 212 between a blowing position and an air suction position along a second direction (for example, the CD direction in the figure). The push plate 213 is provided on one side of the second direction (for example, the CD direction in the figure) Figure 4The air chamber 211 is defined by the push plate 213 (C side) and the inner wall of the air box 212. The baffle 22 is located between the air chamber 211 and the first air hole 12. The second direction is perpendicular to the first direction. A one-way air inlet valve 214 is provided on the air box 212. In the blowing position, the push plate 213 abuts or is adjacent to the baffle 22. In the suction position, the push plate 213 is located on the side of the one-way air inlet valve 214 away from the baffle 22. A push member 215 is provided on the other side of the push plate 213 in the second direction (for example, Figure 4 ), the pushing member 215 is provided on one side of the air box 212, and the pushing member 215 is connected to the movable end 31. When the movable end 31 moves from the second disengaged position to the first disengaged position, it drives the pushing member 215 to push the pushing plate 213 from the suction position to the blowing position. In other words, after the workpiece 200 is separated from the slot 11, the movable end 31 drives the pushing member 215 to push the pushing plate 213 from the suction position to the blowing position. The movable end 31 pushes the pushing plate 213 to squeeze the air cavity 211 through the pushing member 215, and the gas in the air cavity 211 is squeezed. At the same time, the movable end 31 drives the baffle 22 to move from the initial position to the final position. Then, when the baffle 22 passes the connecting position, the gas in the air cavity 211 flows to the first air hole 12 through the second air hole 221, thereby blowing the slot 11.

[0045] exist Figures 3 to 5 In the illustrated embodiment, the push plate 213 is located at the air suction position, and the other side (D side) of the push plate 213 is in contact with the D side wall surface of the air box 212 .

[0046] The second direction is the same as the width direction of the slot 11 .

[0047] Therefore, the test fixture 100 of the embodiment of the present invention realizes the blowing of the blowing part 21 through the mobile component 3, further increasing the function of the mobile component 3 in the test fixture 100 of the embodiment of the present invention. At the same time, the blowing process of the blowing part 21 does not require blowing-related equipment such as an air pump and a pulse solenoid valve. While realizing automatic cleaning of the slot 11, it also avoids the situation where the pipelines in the test operation area are confused due to connecting the air pipe.

[0048] The pushing member 215 includes a first push rod 2151 and a second push rod 2152, one side (side B) of the first push rod 2151 in the first direction is a first guide surface 21511, and the other side (side A) of the first push rod 2151 in the first direction is a first plane 21512, the second push rod 2152 is telescopically arranged on the movable end 31, one side (side B) of the second push rod 2152 in the first direction is a second guide surface 21521, and the other side (side A) of the second push rod 2152 in the first direction is a second plane 21522, and the first push rod 2151 and the second push rod 2152 are opposite to each other in the first direction. During the process of the movable end 31 moving from the first disengaged position to the second disengaged position, the second guide surface 21521 abuts against the first plane 21512 to push the second push rod 2152 to retract toward the movable end 31. During the process of the movable end 31 moving from the second disengaged position to the first disengaged position, the second plane 21522 abuts against the first guide surface 21511 to push the push plate 213 to move from the suction position to the blowing position.

[0049] The process of the movable end 31 driving the workpiece 200 to move toward the slot 11: the movable end 31 first moves from the first disengaged position to the second disengaged position. During this period, the second guide surface 21521 of the second push rod 2152 faces the first plane 21512 of the first push rod 2151. Since the second push rod 2152 is telescopically arranged on the movable end 31, when the movable end 31 moves to the second guide surface 21521 and abuts against the first plane 21512 of the first push rod 2151, the second guide surface 21521 is squeezed by the first plane 21512, causing the second push rod 2152 to retract toward the movable end 31 until the second push rod 2152 is completely located on the first push rod 2151. and the movable end 31, so that the second push rod 2152 can continue to move in the direction B; when the movable end 31 moves to the second disengaged position, the second push rod 2152 and the first push rod 2151 are staggered, and the second push rod 2152 is no longer squeezed by the first push rod 2151 and extends out to reset. At this time, the workpiece 200 is adjacent to the opening of the slot 11; then the movable end 31 moves from the second disengaged position to the plug-in position, and the workpiece 200 is plugged into the slot 11. During this period, the distance between the second push rod 2152 and the first push rod 2151 becomes larger, and the second plane 21522 of the second push rod 2152 faces the first guide surface 21511 of the first push rod 2151.

[0050] The process of the movable end 31 driving the workpiece 200 to be pulled out of the slot 11 (toward the outside of the slot 11) is as follows: the movable end 31 moves from the plug-in position to the second disengagement position, and the distance between the second push rod 2152 and the first push rod 2151 becomes smaller; the movable end 31 moves from the second disengagement position to the first disengagement position, during which the second plane 21522 of the second push rod 2152 abuts against the first guide surface 21511 of the first push rod 2151, and the first guide surface 21511 is squeezed by the second plane 21522 so that the first push rod 2151 moves toward the air box 2 12 moves to the inner side, thereby pushing the push plate 213 to squeeze the air cavity 211. At the same time, the moving end 31 drives the baffle 22 to move from the initial position to the final position. The baffle 22 first reaches the first connecting position and then reaches the second connecting position. The first air hole 12 is connected with the air cavity 211, and the squeezed gas is discharged from the first air hole 12 and blown into the slot 11 to realize the blowing process of the blowing part 21. As the moving end 31 approaches the first disengagement position, the baffle 22 gradually reaches the final position, and the second push rod 2152 gradually disengages from the first push rod 2151.

[0051] When the movable end 31 moves to the first disengaged position, the workpiece 200 is removed from the movable end 31 and the first push rod 2151 is operated to reset: the first push rod 2151 is pulled outward from the air box 212 (for Figure 4 and Figure 5 As shown in the figure, the first push rod 2151 is pulled in the direction D so that the first push rod 2151 moves to the suction position to be reset. When the first push rod 2151 is pulled, the volume of the air cavity 211 is expanded, and the air cavity 211 is filled with gas through the one-way air intake valve 214.

[0052] Specifically, a groove (not shown in the figure) is provided on the movable end 31, and a first spring (not shown in the figure) is provided at the end of the second push rod 2152. The first spring is provided at the bottom of the groove, and a portion of the second push rod 2152 is located in the groove. Therefore, when the second push rod 2152 is subjected to pressure, at least a portion of the second push rod 2152 retracts into the groove, and the first spring is deformed under pressure. When the pressure on the second push rod 2152 is removed, under the action of the elastic force of the first spring, the retracted portion of the second push rod 2152 extends out of the groove, and the second push rod 2152 is reset.

[0053] Specifically, such as Figure 4 and Figure 5 As shown, the first guide surface 21511 is a straight surface inclined relative to the first plane 21512, and the first guide surface 21511 gradually inclines toward the direction close to the first plane 21512 along the direction from C to D, and the second guide surface 21521 is a straight surface inclined relative to the second plane 21522, and the second guide surface 21521 gradually inclines toward the direction close to the second plane 21522 along the direction from top to bottom.

[0054] Further, such as Figures 4 to 7 As shown, the main body 1 is provided with a slide 13 extending along the first direction. The slide 13 is open toward one side of the baffle 22, which is provided with a receiving slot 222. The test fixture 100 further includes a connecting assembly 4, which comprises a pressure plate 41, a traction rope 42, an auxiliary rod 43, and a telescopic rod 44. The pressure plate 41 is provided on the movable end 31. One end (end A) of the traction rope 42 is connected to the pressure plate 41. One end of the auxiliary rod 43 is connected to the other end (end B) of the traction rope 42. The other end of the auxiliary rod 43 is connected to the telescopic rod 44. The telescopic rod 44 is movably provided in the slide 13 and has a telescopic end that abuts against the wall of the baffle 22 or the bottom of the receiving slot 222. When the movable end 31 moves from the second disengaged position to the engaged position, the pressure plate 41 abuts the auxiliary rod 43. When the movable end 31 moves from the second disengaged position to the first disengaged position, the traction rope 42 remains stretched.

[0055] The process of the moving end 31 driving the workpiece 200 to move toward the slot 11: the moving end 31 first moves from the first disengagement position to the second disengagement position, during which the traction rope 42 gradually relaxes; when the moving end 31 moves to the second disengagement position, as shown in FIG. Figures 4 to 7 As shown, the pressure plate 41 abuts the auxiliary rod 43; as the movable end 31 moves toward the plug-in position, the movable end 31 synchronously drives the auxiliary rod 43 and the telescopic plug rod 44 to move through the pressure plate 41, and the telescopic end of the telescopic plug rod 44 disengages from the accommodating groove 222 of the baffle 22. When the movable end 31 reaches the plug-in position, the telescopic plug rod 44 is located at the bottom of the slide groove 13, and the telescopic end of the telescopic plug rod 44 abuts the wall surface of the baffle 22.

[0056] The process of the moving end 31 driving the workpiece 200 to be pulled out of the slot 11 (towards the outside of the slot 11): the moving end 31 moves from the plug-in position to the second disengaged position, the moving end 31 drives the pressure plate 41 and the one end of the traction rope 42 to move, and the traction rope 42 is gradually straightened; when the moving end 31 reaches the second disengaged position, the traction rope 42 is in a straightened state, and then the moving end 31 moves from the second disengaged position to the first disengaged position, the moving end 31 synchronously drives the auxiliary rod 43 and the telescopic insertion rod 44 to move through the pressure plate 41 and the traction rope 42, and when the telescopic insertion rod 44 moves to correspond to the accommodating groove 222 of the baffle 22, the telescopic end of the telescopic insertion rod 44 extends into the accommodating groove 222, and the telescopic end abuts against the bottom of the accommodating groove 222, and then the telescopic insertion rod 44 drives the baffle 22 to move synchronously, so that the baffle 22 passes through the first connecting position and the second connecting position from the initial position successively, and when the moving end 31 reaches the first disengaged position, the baffle 22 reaches the final position.

[0057] The tested workpiece 200 is then removed and a new workpiece 200 to be tested is installed on the movable end 31. After the movable end 31 moves from the first disengaged position to the second disengaged position, the traction rope 42 is relaxed, and the baffle 22 is then pulled from the final position to the initial position, causing the baffle 22 to return to its original position. As the baffle 22 is pulled back to its original position, the telescopic insertion rod 44, the auxiliary rod 43, and the other end of the traction rope 42 move synchronously with the baffle 22. The movable end 31 then drives the workpiece 200 from the second disengaged position to the inserted position. This process is repeated to test multiple workpieces.

[0058] The test fixture 100 of the embodiment of the present invention connects the baffle 22 and the movable end 31 through the connecting component 4, which not only realizes the connection between the movable end 31 and the baffle 22 during the movement from the plug-in position to the first disengaged position, ensuring that the baffle 22 moves to the connected position after the workpiece 200 is pulled out of the slot 11, thereby ensuring the soot blowing of the slot 11, but also avoids the baffle 22 being in the connected position during the movement of the movable end 31 from the second disengaged position to the plug-in position, that is, in the process of driving the workpiece 200 to be plugged into the slot 11, thereby preventing the baffle 22 from being in the connected position, thereby preventing dust on the workpiece 200 from entering the air cavity 211 through the first air hole 12 and the second air hole 221 on the baffle 22, ensuring the cleanliness of the gas in the air cavity 211, thereby further ensuring the soot blowing effect of the blowing member 21 on the slot 11.

[0059] like Figure 5 and Figure 7 As shown, the telescopic rod 44 includes an outer rod 441, an inner rod 442 and an elastic member 443. The outer rod 441 has a movable groove 4411. The inner rod 442 is movably arranged in the movable groove 4411. The elastic member 443 connects the bottom wall of the movable groove 4411 and one end (end C) of the inner rod 442. The other end (end D) of the inner rod 442 is provided with an avoidance surface 4421. The avoidance surface 4421 is located on the side of the inner rod 442 adjacent to the other side (bottom of the groove) of the chute 13 in the first direction. That is, the avoidance surface 4421 is located on the side of the inner rod 442 adjacent to the bottom of the chute 13 in the first direction. Figure 7 As shown, the avoidance surface 4421 is located on the B side of the D end of the inner rod 442. The inner rod 442 forms the telescopic end of the telescopic insertion rod 44.

[0060] During the movement of the movable end 31 from the second disengaged position to the engaged position, the movable end 31 pushes the telescopic rod 44 toward the B side of the slide groove 13 (that is, the bottom direction of the slide groove 13) through the pressure plate 41 and the auxiliary rod 43. The avoidance surface 4421 of the inner rod 442 abuts against the wall surface of the accommodating groove 222 of the baffle 22, thereby causing the inner rod 442 to move toward the movable groove 4411, and the elastic member 443 is deformed under pressure to achieve the retraction of the telescopic rod 44. As the mobile end 31 continues to push the telescopic rod 44, the telescopic rod 44 is completely disengaged from the accommodating groove 222 of the baffle 22. After the inner rod 442 disengages from the accommodating groove 222, the D end of the inner rod 442 abuts against the baffle 22.

[0061] During the movement of the movable end 31 from the second disengaged position to the first disengaged position, the movable end 31 synchronously drives the auxiliary rod 43 and the telescopic rod 44 to move toward the A side of the slide groove 13 through the pressure plate 41 and the traction rope 42. When the telescopic rod 44 moves to correspond to the accommodating groove 222 of the baffle 22, under the elastic force of the elastic member 443, the inner rod 442 moves toward the accommodating groove 222 and extends into the accommodating groove 222. The D end of the inner rod 442 abuts against the bottom of the accommodating groove 222, and then the telescopic rod 44 drives the baffle 22 to move synchronously.

[0062] The telescopic rod 44 has a simple structure and can automatically connect to and disconnect from the baffle 22 during movement, thereby helping to reduce the equipment cost of the test fixture 100 according to the embodiment of the present invention.

[0063] Specifically, the elastic member 443 is a second spring. The inner rod 442 is a rectangular block as a whole, and the avoidance surface 4421 is an arc surface, that is, the B side of the D end of the inner rod 442 is a rounded corner.

[0064] Further, such as Figures 4 to 6 As shown, the other side of the air box 212 is connected to the main body 15 of the body 1. The baffle 22 is located within the air box 212 and abuts the wall of the other side of the air box 212. A third air hole 2121 is provided on the other side of the air box 212, and the third air hole 2121 is connected to the first air hole 12. A clearance groove 2122 is provided on the other side of the air box 212, and the clearance groove 2122 is connected to the slide groove 13 and the receiving groove 222. The telescopic insertion rod 44 is located in the clearance groove 2122. The clearance groove 2122 is not connected to the third air hole 2121. The baffle 22 is arranged in the air box 212, which can save the size of the test fixture 100 in the second direction, and the movement of the baffle 22 is limited by the internal structure of the air box 212 (that is, the walls on both sides of the air box 212 in the first direction), thereby ensuring the safety of the movement of the baffle 22, and ensuring that the baffle 22 moves into place when the baffle 22 is pulled to return to the initial position, which is also conducive to a compact structural layout.

[0065] Specifically, the connecting assembly 4 further includes a mating plate 45 and an auxiliary block 46. The mating plate 45 is arranged at one end of the auxiliary rod 43. The mating plate 45 and the pressure plate 41 are opposite to each other in the first direction. The other end of the traction rope 42 is arranged on the mating plate 45. The auxiliary block 46 is arranged at the other end of the auxiliary rod 43. A threaded hole is provided on the auxiliary block 46. The other end of the auxiliary rod 43 is provided with a threaded section. The threaded section is mated with the threaded hole. The auxiliary block 46 is located in the slide groove 13 and the give way groove 2122. The auxiliary block 46 is connected to the outer rod 441 of the telescopic insertion rod 44.

[0066] During movement of the movable end 31 from the second disengaged position to the engaged position, the mating plate 45 increases the contact area between the auxiliary rod 43 and the pressure plate 41, ensuring that the pressure plate 41 pushes the auxiliary rod 43. The auxiliary block 46 increases the connection strength between the auxiliary rod 43 and the outer rod 441 of the telescopic rod 44. Furthermore, the coordination of the auxiliary block 46 with the slide groove 13 and the clearance groove 2122 guides the movement of the telescopic rod 44 in the first direction, ensuring the stability and smoothness of the movement of the telescopic rod 44, thereby ensuring the stability of the movement of the baffle 22 driven by the telescopic rod 44, and thus improving the reliability of the test fixture 100 according to the embodiment of the present invention.

[0067] Specifically, such as Figure 6 As shown, the main body 1 is provided with an installation opening that communicates with the opening of the chute 13. A cover plate 14 is provided at the installation opening, which closes the chute 13. The auxiliary rod 43 passes through the cover plate 14 and can slide between the cover plate 14. When installing the connecting assembly 4, the auxiliary rod 43, the auxiliary block 46, and the telescopic plug rod 44 are first assembled. Then, the telescopic plug rod 44 is inserted into the chute 13 of the main body 1 and rests against the inner bottom wall of the chute 13. Then, the cover plate 14 is passed through the auxiliary rod 43 and covers the installation opening. That is, the cover plate 14 can be fixed to the main body 1 by screws, or the cover plate 14 can be welded to the main body 1.

[0068] Furthermore, the test fixture 100 of the embodiment of the present invention further includes a pull rod 5, which is connected to the baffle 22. The pull rod 5 is located on the side of the baffle 22 away from the pressure plate 41 in the first direction. The air box 212 is provided with an avoidance hole, and the pull rod 5 is passed through the avoidance hole. The air box 212 is provided with a sealing ring at the avoidance hole, and the sealing ring abuts the pull rod 5. Figure 3 and Figure 4 As shown, the tie rod 5 is located on side B of the baffle. The tie rod 5 moves synchronously with the baffle 22. To return the baffle 22 to its initial position, the tie rod 5 is pulled outside the air box 212. The small size of the tie rod 5 facilitates its extension from the air box 212 for pulling. It also facilitates the installation of a sealing ring between the air box 212 and the tie rod 5, ensuring the airtightness of the air box 212 and thus maintaining the gas pressure within the air box 212.

[0069] like Figure 2 and Figure 8 As shown, the test fixture 100 according to the embodiment of the present invention further includes a dustproof assembly 6, which includes a telescopic member 61 and a dustproof plate 62. The telescopic member 61 is disposed on the support portion 16 of the main body 1. The telescopic member 61 is connected to the dustproof plate 62 to drive the dustproof plate 62 to move between a dustproof position and a test position. In the dustproof position, one end (the upper end) of the dustproof plate 62 blocks the opening of the slot 11. In the test position, the dustproof plate 62 is spaced apart from the main body 1. The dustproof assembly 6 is capable of sealing the opening of the slot 11. When the test fixture 100 according to the embodiment of the present invention is not in use or when a workpiece is not inserted into the slot 11, the dustproof plate 62 blocks the opening of the slot 11, thereby preventing dust from the environment from entering the slot 11 and ensuring the cleanliness of the slot 11.

[0070] like Figure 8 As shown, the dustproof assembly 6 further includes a fixing plate 63 and a suction plate 64. The fixing plate 63 is disposed at the other end (lower end) of the dustproof plate 62. In the first direction, the fixing plate 63 is located on the side of the dustproof plate 62 facing away from the slot 11. The suction plate 64 is detachably mounted on the fixing plate 63, and the opening of the slot 11 is tilted toward the suction plate 64. Dust blown out of the opening of the slot 11 is blown toward the suction plate 64. The suction plate 64 can absorb the dust, preventing it from flying and falling elsewhere in the working environment of the test fixture 100, thereby ensuring the cleanliness of the working environment. At the same time, the suction plate 64 is removable for easy replacement.

[0071] Specifically, the telescopic member 61 is a micro cylinder.

[0072] Specifically, such as Figure 1 and Figure 2 As shown, the moving assembly 3 includes vertical rods 32, a mounting plate 33, a micromotor 34, a lead screw 35, a sliding plate 36, a clamping jaw 37, and a guide rod 38. There are four vertical rods 32, with two vertical rods 32 forming a group. The two groups of vertical rods 32 are located on either side of the main body 1 in the first direction, and each group of vertical rods 32 is equipped with a mounting plate 33. The micromotor 34 is mounted on one mounting plate 33. One end (end A) of the lead screw 35 is connected to the output end of the micromotor 34, and the other end (end B) of the lead screw 35 is mounted on the mounting plate 33 on the other side. There are two guide rods 38, one on either side of the main body 1 in the second direction, with the ends of the guide rods 38 connected to the two mounting plates 33. The sliding plate 36 is mounted on the lead screw 35. Guide holes are provided on both sides of the sliding plate 36 in the first direction, and the guide rods 38 are mounted in these guide holes. Both the lead screw 35 and the guide rod 38 extend in the first direction. The clamping jaw 37 is provided on the sliding plate 36 , and the clamping jaw 37 is used to clamp the workpiece 200 .

[0073] The sliding plate 36 forms the movable end 31 of the movable assembly 3. Specifically, the pressure plate 41 and the second push rod 2152 are disposed on the sliding plate 36. The sliding plate 36 is located on the upper side of the main body 15, and the dustproof assembly 6 is located on the lower side of the sliding plate 36. The opening of the slot 11 is tilted downward toward the suction plate 64, and the length of the two uprights 32 on the A side is shorter than the length of the two uprights 32 on the B side.

[0074] Specifically, the clamping jaw 37 is a pneumatic clamping jaw 37 .

[0075] The above is a detailed introduction to a test fixture 100 provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only intended to help understand the method and core ideas of the present application. It should be noted that, for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A test fixture (100), characterized in that: include: A body (1), the body (1) having a slot (11), the slot (11) being open on at least one side in a first direction for inserting a workpiece (200) to be tested, and the body (1) being provided with a first air hole (12) in communication with the slot (11); A blowing assembly (2), the blowing assembly (2) comprising a blowing member (21) and a baffle (22), the blowing member (21) being provided on the body (1), the blowing member (21) having an air cavity (211) containing gas, the baffle (22) being movably provided on the blowing member (21) along a first direction during or after the workpiece (200) is separated from the slot (11), and the baffle (22) having a connecting position, wherein the air cavity (211) is connected to the first air hole (12) to blow air into the slot (11); The first air holes (12) have a plurality of them, and the plurality of the first air holes (12) are divided into at least two groups and include a first direction group (121) and a second direction group (122). The first air holes (12) of the first direction group (121) extend in a direction away from the baffle (22) and are inclined toward the other side of the slot (11) in the first direction. The first air holes (12) of the second direction group (122) extend in a direction away from the baffle (22) and are inclined toward the opening of the slot (11). The second direction group (122) is located on a side of the first direction group (121) away from the opening of the slot (11).

2. The test fixture (100) according to claim 1, characterized in that: A second air hole (221) is provided on the baffle (22), and at the communication position, the air cavity (211) is communicated with the first air hole (12) through the second air hole (221).

3. The test fixture (100) according to claim 2, characterized in that: There are a plurality of second air holes (221) corresponding one-to-one to the first air holes (12).

4. The test fixture (100) according to claim 3, characterized in that: The plurality of second air holes (221) are divided into at least two groups and include a first connected group (2211) and a second connected group (2212), wherein the first connected group (2211) corresponds to the first direction group (121), and the second connected group (2212) corresponds to the second direction group (122).

5. The test fixture (100) according to claim 4, characterized in that: The baffle (22) further has an initial position and a final position, the baffle (22) is movable between the initial position and the final position along the first direction, the communication position is located between the initial position and the final position, and in the initial position, the distance between the second air holes (221) of the first communication group (2211) and the first air holes (12) of the first direction group (121) is smaller than the distance between the second air holes (221) of the second communication group (2212) and the first air holes (12) of the second direction group (122).

6. The test fixture (100) according to claim 5, characterized in that: The communication position comprises a first communication position and a second communication position, wherein at the first communication position, the first air hole (12) of the first direction group (121) and the second air hole (221) of the first communication group (2211) are connected, and the first air hole (12) of the second direction group (122) and the second air hole (221) of the second communication group (2212) are disconnected, and at the second communication position, the first air hole (12) of the first direction group (121) and the second air hole (221) of the first communication group (2211) are disconnected, and the first air hole (12) of the second direction group (122) and the second air hole (221) of the second communication group (2212) are connected.

7. The test fixture (100) according to claim 1, characterized in that: The invention also includes a moving component (3), wherein the moving component (3) has a moving end (31), and the moving end (31) moves along the first direction between a plug-in position and a disengagement position. The moving end (31) is used to install a workpiece (200) to be tested so that the workpiece (200) is plugged into the slot (11) at the plug-in position and the workpiece (200) is spaced apart from the slot (11) at the disengagement position. The moving end (31) is connected to the baffle (22) so that the moving end (31) drives the baffle (22) to move along the first direction.

8. The test fixture (100) according to claim 7, characterized in that: The disengaged position includes a first disengaged position and a second disengaged position, wherein the second disengaged position is located between the first disengaged position and the plug-in position. In the second disengaged position, the workpiece (200) is disengaged from the slot (11) and is adjacent to the opening of the slot (11). After the movable end (31) drives the workpiece (200) to disengage from the slot (11) and moves from the second disengaged position to the first disengaged position, the movable end (31) drives the baffle (22) to move along the first direction.

9. The test fixture (100) according to claim 8, characterized in that: The blowing member (21) comprises: An air box (212), the air box (212) being arranged on the body (1); a push plate (213), the push plate (213) being movably disposed in the air box (212) between a blowing position and an air suction position along a second direction, the air cavity (211) being defined by one side of the push plate (213) in the second direction and an inner wall surface of the air box (212), the baffle (22) being located between the air cavity (211) and the first air hole (12), the second direction being perpendicular to the first direction; a one-way air intake valve (214), the one-way air intake valve (214) being provided on the air box (212), wherein in the blowing position, the push plate (213) abuts against or is adjacent to the baffle (22), and in the suction position, the push plate (213) is located on a side of the one-way air intake valve (214) facing away from the baffle (22); and A pushing member (215), the pushing member (215) is arranged on the other side of the push plate (213) in the second direction, the pushing member (215) is passed through one side of the air box (212), the pushing member (215) is connected to the movable end (31), and the movable end (31) drives the pushing member (215) to push the push plate (213) from the suction position to the blowing position during the process of moving from the second disengaged position to the first disengaged position.

10. The test fixture (100) according to claim 9, characterized in that: The pushing member (215) includes a first push rod (2151) and a second push rod (2152), wherein one side of the first push rod (2151) in the first direction is a first guide surface (21511), and the other side of the first push rod (2151) in the first direction is a first plane (21512), and the second push rod (2152) is telescopically arranged on the moving end (31), and one side of the second push rod (2152) in the first direction is a second guide surface (21521), and the other side of the second push rod (2152) in the first direction is a second plane (21522), and the first push rod (2151) is provided with a plurality of guide surfaces. The rod (2151) and the second push rod (2152) are opposite to each other in the first direction. When the movable end (31) moves from the first disengaged position to the second disengaged position, the second guide surface (21521) abuts against the first plane (21512) to push the second push rod (2152) to retract toward the movable end (31). When the movable end (31) moves from the second disengaged position to the first disengaged position, the second plane (21522) abuts against the first guide surface (21511) to push the push plate (213) to move from the suction position to the blowing position.

11. The test fixture (100) according to claim 9, characterized in that: The body (1) is provided with a slide groove (13) extending along the first direction, the slide groove (13) is open toward one side of the baffle (22), and the baffle (22) is provided with a receiving groove (222); The test fixture (100) further includes a connecting assembly (4), the connecting assembly (4) including a pressure plate (41), a traction rope (42), an auxiliary rod (43) and a telescopic rod (44), the pressure plate (41) is arranged on the movable end (31), one end of the traction rope (42) is connected to the pressure plate (41), one end of the auxiliary rod (43) is connected to the other end of the traction rope (42), the other end of the auxiliary rod (43) is connected to the telescopic rod (44), the telescopic rod (44) is movably arranged in the slide groove (13), the telescopic rod (44) has a telescopic end, and the telescopic end abuts against the wall of the baffle (22) or the bottom of the accommodating groove (222); During the movement of the movable end (31) from the second disengaged position to the plugged position, the pressure plate (41) abuts against the auxiliary rod (43); during the movement of the movable end (31) from the second disengaged position to the first disengaged position, the traction rope (42) is in a straightened state.

12. The test fixture (100) according to claim 11, characterized in that: The telescopic insertion rod (44) includes an outer rod (441), an inner rod (442) and an elastic member (443), wherein the outer rod (441) has a movable groove (4411), and the inner rod (442) is movably arranged in the movable groove (4411), and the elastic member (443) connects the bottom wall surface of the movable groove (4411) and one end of the inner rod (442), and the other end of the inner rod (442) is provided with an avoidance surface, and the avoidance surface is located on a side of the inner rod (442) adjacent to the other side of the sliding groove (13) in the first direction in the first direction.

13. The test fixture (100) according to claim 11, characterized in that: The other side of the air box (212) is connected to the main body (1), the baffle (22) is located in the air box (212) and abuts against the wall of the other side of the air box (212), a third air hole (2121) is provided on the other side of the air box (212), the third air hole (2121) is communicated with the first air hole (12), a clearance groove (2122) is provided on the other side of the air box (212), both sides of the clearance groove (2122) are respectively communicated with the slide groove (13) and the accommodating groove (222), and the telescopic insertion rod (44) is located in the clearance groove (2122).

14. The test fixture (100) according to claim 13, characterized in that: It further includes a pull rod (5), the pull rod (5) is connected to the baffle (22), the pull rod (5) is located on the side of the baffle (22) away from the pressure plate (41) in the first direction, the air box (212) is provided with a avoidance hole, the pull rod (5) is passed through the avoidance hole, and the air box (212) is provided with a sealing ring at the avoidance hole, and the sealing ring abuts the pull rod (5).

15. The test fixture (100) according to claim 1, characterized in that: The invention further comprises a dustproof assembly (6), wherein the dustproof assembly (6) comprises a telescopic member (61) and a dustproof plate (62), wherein the telescopic member (61) is provided on the body (1), and the telescopic member (61) is connected to the dustproof plate (62) to drive the dustproof plate (62) to move between a dustproof position and a test position, wherein in the dustproof position, one end of the dustproof plate (62) blocks the opening of the slot (11), and in the test position, the dustproof plate (62) is spaced apart from the body (1).

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