Circuit board circuit testing device

Abstract

The utility model discloses a circuit testing device for a circuit board, which comprises an equipment box body provided with a fan air outlet and an air guide frame movably arranged in the fan air outlet, the port of the fan air outlet is provided with an inclined plane, the air guide frame is fixedly provided with a convex block which is assembled with the inclined plane in a sliding manner, and the convex block is fixedly connected with the fan air outlet. The protruding blocks assembled in a sliding mode drive the ports of the air guide frame to be opened or closed so that the distance between the ports of the air guide frame can be adjusted. According to the circuit board circuit testing device provided by the utility model, the air outlet ports of the air guide frames are folded and shrunk, so that the air speed of discharged ions is higher, the air speed of the air guide frames in a far-away state can be higher, and the problem that the electrostatic eliminating effect is reduced due to the fact that the distance is increased can be solved, on the contrary, when the air guide frames are close to stacked circuit boards, the static eliminating effect is reduced. And the port of the air guide frame is expanded to enable the air speed to be diffused and become smaller, so that the problem that dust is blown into the circuit boards to be attached due to the fact that the distance is reduced is solved, and the accuracy of subsequent detection results of the circuit boards is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board testing, in particular to a circuit board circuit testing device. Background Art

[0002] Circuit board testing can automatically complete operations such as transportation, stacking, ion static removal, testing, and statistical data under the control of automated equipment. For the ion static removal step, an ion fan is used to remove static electricity from the stacked circuit boards.

[0003] According to the publication (announcement) number: CN116298793A, publication date: 2023-06-23, a circuit board testing device is disclosed.

[0004] According to the publication (announcement) number: CN208969134U, the publication (announcement) date: 2019-06-11, a circuit board test rack with static electricity and dust removal functions is disclosed.

[0005] According to the publication (announcement) number: CN211802800U, the publication (announcement) date: 2020-10-30, a dust removal device for an integrated circuit board for integrated circuit testing is disclosed.

[0006] In the prior art including the above-mentioned patents, automated equipment often adapts to circuit boards of different sizes during testing. Because the specifications of the circuit boards change, the distance between the air outlet and the circuit board should be changed when the circuit board is destaticized by the ion blower. However, since the size of the air outlet of the ion blower is fixed, when it is close to the circuit board, the circuit board will be affected by more wind. When the automated equipment is running the circuit board on other testing equipment, dust in the outside air can easily enter the automated equipment. When the wind volume increases, the floating dust can be easily blown by the wind and continue to adhere to the circuit board, thereby affecting the detection of the circuit board and reducing the accuracy of the circuit board detection results. Utility Model Content

[0007] The utility model aims to provide a circuit board circuit testing device, aiming to solve the above-mentioned problems.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A circuit board circuit testing device comprises an equipment box provided with a fan air outlet, and also comprises an air guide frame movable in the fan air outlet, wherein the fan air outlet port is provided with an inclined surface, and a protrusion slidably assembled with the inclined surface is fixedly mounted on the air guide frame;

[0010] The protrusion under the sliding assembly drives the ports of the air guide frame to open and close / close together, so that the spacing between the ports of the air guide frame can be adjusted.

[0011] Preferably, a filter element assembled with a sealing plate is provided in the air guide frame, and the air guide frame and the sealing plate are slidably matched in a closed state, and squeeze the filter element so that its inclination angle is adjustable.

[0012] Preferably, a rotary cavity is provided on the protrusion, and the rotary cavity port is provided with an inlet connected to the port of the air guide frame;

[0013] The rotary cavity is provided with a retention section for guiding the airflow in the air guide frame.

[0014] Preferably, a swing plate equipped with an arc-shaped protrusion is hingedly provided in the inlet, and the airflow guided by the inlet cooperates with the arc-shaped protrusion to make the swing plate move repeatedly.

[0015] Preferably, a storage cylinder with a through hole is rotatably arranged inside the swing plate, and the swing plate intermittently connects the retention section to the through hole in a repeatedly moving state.

[0016] Preferably, a storage cavity is provided on the protrusion, an inclined sheet is fixedly installed on the end of the storage cylinder, and a notch is provided on the sealing plate;

[0017] In the sliding state, the sealing plate causes the notch to pull the inclined sheet to rotate the storage cylinder, and causes the through hole to communicate with the storage cavity.

[0018] Preferably, a discharge port is provided at the end of the swing plate, and the discharge port is connected to the storage cavity.

[0019] In the above technical scheme, a circuit board circuit testing device provided by the utility model has the following beneficial effects: in the process of the air guide frame being pulled and moved horizontally away from the stacked circuit boards, the protrusion actively slides with the inclined surface and moves toward the inside of the fan outlet port in a retracted state. At this time, the existence of the protrusion causes the hinged position of the end of the air guide frame to deflect, so as to bring the air outlet port of the air guide frame closer and smaller, so as to make the discharged ion wind speed greater, so that the air guide frame in the away state can make the wind speed greater to compensate for the reduced static electricity removal effect caused by the increase in spacing. Conversely, when the air guide frame is close to the stacked circuit boards, the port of the air guide frame expands to diffuse the wind speed and become smaller, so as to buffer the adhesion problem caused by the dust blowing into the circuit boards due to the decrease in spacing, so that circuit boards of different specifications are not easily adhered to dust due to the smaller spacing and the unchanged wind speed during the static electricity removal, thereby ensuring the accuracy of subsequent inspection results of the circuit boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 A schematic diagram of the structure of the fan outlet of the automation equipment and the fan outlet therein provided in the embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the structure of the fan air outlet and the air guide frame therein provided in an embodiment of the utility model;

[0023] Figure 3 A schematic side cross-sectional view of a fan air outlet and an air guide frame therein provided in an embodiment of the utility model;

[0024] Figure 4 for Figure 3 A magnified schematic diagram of point A;

[0025] Figure 5 A schematic cross-sectional view of a side portion of an air guide frame provided by an embodiment of the utility model;

[0026] Figure 6 A schematic diagram of the filter structure provided in an embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 1. Equipment box; 2. Fan outlet; 3. Air guide frame; 31. Bump; 32. Rotation chamber; 321. Inlet; 322. Retention section; 33. Swing plate; 331. Guide port; 34. Storage cylinder; 341. Inclined sheet; 342. Through hole; 35. Storage chamber; 351. Exhaust port; 4. Filter element; 41. Sealing plate; 42. Notch. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] like Figure 1-6 As shown, a circuit board circuit testing device comprises an equipment box 1 provided with a fan air outlet 2, and also comprises an air guide frame 3 movable in the fan air outlet 2, the fan air outlet 2 port is provided with an inclined surface, and a protrusion 31 slidably assembled with the inclined surface is fixedly installed on the air guide frame 3;

[0031] The protrusion 31 under the sliding assembly drives the ports of the air guide frame 3 to open and close / close together, so that the distance between the ports of the air guide frame 3 can be adjusted.

[0032] Specifically, the fan outlet 2 is the final outlet section of the centrifugal fan, circuit boards are stacked in the equipment box 1, and all of them are prior art, which will not be elaborated here, the air guide frame 3 is pulled by the centrifugal fan to move synchronously, and the fan outlet 2 remains fixed.

[0033] Furthermore, the inclined surface of the fan air outlet 2 makes its port cross-section trapezoidal, and the large trapezoidal port faces the multiple stacked circuit boards, while the air guide frame 3 replaces the exhaust of the original fan air outlet 2.

[0034] In the process of the air guide frame 3 being pulled and moved laterally away from the stacked circuit boards, the protrusion 31 actively slides with the inclined surface and moves toward the inside of the port of the fan outlet 2 in a retracted state. At this time, the existence of the protrusion 31 causes the hinged position of the end of the air guide frame 3 to deflect, so as to bring the air outlet ports of the air guide frame 3 closer and smaller, so as to make the discharged ion wind speed greater, so that the air guide frame 3 in the away state can make the wind speed greater to compensate for the reduced static electricity removal effect caused by the increase in spacing. On the contrary, when the air guide frame 3 is close to the stacked circuit boards, the port of the air guide frame 3 is enlarged to diffuse the wind speed and become smaller, so as to buffer the adhesion problem caused by the dust blowing into the circuit boards caused by the decrease in spacing, so that circuit boards of different specifications are not easily adhered to dust due to the smaller spacing and the unchanged wind speed during the static electricity removal, thereby ensuring the accuracy of subsequent inspection results of the circuit boards.

[0035] As an embodiment further provided by the present invention, a filter element 4 equipped with a sealing plate 41 is provided in the air guide frame 3. When the air guide frame 3 and the sealing plate 41 are slidably matched, the filter element 4 is squeezed to make its inclination angle adjustable.

[0036] Specifically, the filter element 4 can filter dust and ensure the passage of ion wind. The material is existing technology and will not be described here. An elastic sheet is fixedly installed on the end of the filter element 4. The elastic sheet is fixedly connected to one of the inner walls of the air guide frame 3, and a sealing plate 41 is fixedly installed on the other end of the filter element 4.

[0037] When the air guide frames 3 are brought together to reduce their ports, the sealing plate 41 is squeezed by the inner wall of the air guide frame 3 and slides. At this time, the elastic sheet is deformed to tilt the filter element 4 again, thereby ensuring the filtering effect of the filter element 4 on the ion airflow ejected from the air guide frame 3.

[0038] As another embodiment further provided by the present invention, a rotary cavity 32 is provided on the protrusion 31, and an inlet 321 connected to a port of the air guide frame 3 is provided at the port of the rotary cavity 32;

[0039] A retention section 322 for guiding the airflow in the air guide frame 3 is arranged in the rotary cavity 32 .

[0040] Specifically, the rotary chamber 32 is in an inner spiral shape, and the retention section 322 is located at the end of the spiral airflow, so that the dust can stay and be stored in the retention section 322 .

[0041] The airflow flowing in the air guide frame 3 is diverted by the filter element 4 and enters the rotary chamber 32 from the inlet 321, so that the airflow flows in a spiral in the rotary chamber 32 and converges on the inner side of the spiral, that is, the retention section 322, so that the residual dust in the airflow is retained by the retention section 322, so as to reduce the dust contained in the airflow flowing in the air guide frame 3, so that the filter element 4 has less wear and a longer service life, and the airflow discharged from the port of the air guide frame 3 contains less dust, so as to ensure the ion static removal effect on the stacked circuit boards.

[0042] As another embodiment further provided by the present invention, a swing plate 33 equipped with an arc-shaped protrusion is hingedly provided in the inlet 321, and the airflow guided by the inlet 321 cooperates with the arc-shaped protrusion to make the swing plate 33 move repeatedly.

[0043] Specifically, the arc-shaped protrusion is bent at the end of the swing plate 33 so that the airflow spiraling upward from the retention section 322 can be obstructed when it blows to the arc-shaped protrusion, so that the dust is blocked and stays in the retention section 322, and at the same time, the swing plate 33 is driven to be deflected by the wind pressure of the arc-shaped protrusion.

[0044] The upward spiral airflow from the retention section 322 is obstructed when it blows to the arc-shaped protrusion, so that the swing plate 33 is deflected by the pressure of the wind, and at this time, the inlet 321 is deflected and reduced by the swing plate 33, so that the flow rate entering the rotary chamber 32 is higher, and the area of ​​the retention section 322 is increased. With the wind blowing on the arc-shaped protrusion smaller, the swing plate 33 is reset under the action of the torsion spring to restore the deformation, and this is repeated to keep the swing plate 33 moving.

[0045] As another embodiment further provided by the present invention, a storage cylinder 34 with a through hole 342 is rotatably disposed inside the swing plate 33 , and the swing plate 33 intermittently connects the retention section 322 to the through hole 342 in a repeatedly moving state.

[0046] Specifically, a gap is left between the hinged position of the swing plate 33 and the rotary chamber 32 , and the gap is opened and closed by the repeated movement of the swing plate 33 , so that the gap is connected to the through hole 342 .

[0047] During the continuous deflection of the swing plate 33, the gap is intermittently connected to the through hole 342, and the dust accumulated in the retention section 322 is replenished into the hollow storage cylinder 34 through the through hole 342, so that the storage cylinder 34 stores the collected dust, thereby preventing the dust from staying in the retention section 322 for a long time and interfering with the exhaust of the air guide frame 3.

[0048] As another embodiment further provided by the present invention, a storage cavity 35 is provided on the protrusion 31, an inclined piece 341 is fixedly installed on the end of the storage cylinder 34, and a notch 42 is provided on the sealing plate 41;

[0049] In the sliding state, the sealing plate 41 causes the notch 42 to pull the inclined piece 341 to rotate the storage cylinder 34 and connect the through hole 342 to the storage chamber 35 .

[0050] Specifically, the notch 42 does not interfere with the ventilation of the inlet 321 in the default state.

[0051] During the sliding process of the sealing plate 41, the inner side of the notch 42 is brought into contact with the inclined pieces 341 at both ends of the storage barrel 34, and the inclined pieces 341 are pulled as the sealing plate 41 continues to slide, so that the storage barrel 34 is pulled and rotated, and accompanied by the deformation of the torsion spring at the rotation position of the storage barrel 34, the through hole 342 in the gap is rotated and connected to the storage chamber 35, so that the dust in the storage barrel 34 can be replenished and stored in the storage chamber 35, so that the dust is transported away from the retention section 322, thereby ensuring the normal operation of the rotary chamber 32 and increasing the capacity for storing dust.

[0052] Secondly, when the equipment needs to be shut down, the port of the air guide frame 3 is maximized, and the filter element 4 tends to be in a vertical state, but still remains inclined. At this time, the sealing plate 41 slides into the port of the air guide frame 3, so that the sealing plate 41 without a notch 42 blocks the inlet 321, so that the dust stored in the rotary chamber 32 will not enter the air guide frame 3 and interfere with its next exhaust. At this time, the storage cylinder 34 is deformed again under the action of the torsion spring to connect the through hole 342 and the gap.

[0053] As another embodiment further provided by the present invention, a discharge port 351 is provided at the end of the swing plate 33 , and the discharge port 351 is connected to the storage chamber 35 .

[0054] Specifically, the exhaust port 351 is connected to a suction pump (the suction pump and its pipeline are prior art and are not described in detail here) provided at the air outlet 2 of the fan, so that the dust is sucked away and stored centrally.

[0055] Furthermore, guide ports 331 are provided on the inner walls on both sides of the rotary cavity 32 , and the guide ports 331 are located on the inner side of the arc-shaped protrusion, so that the airflow blowing toward the arc-shaped protrusion can enter the guide ports 331 for diversion.

[0056] The final airflow in the rotary chamber 32 enters the exhaust port 351 from the two guide ports 331, so that the airflow forms a suction effect on the upper end of the storage chamber 35 when flowing in the exhaust port 351, so that the airflow at the exhaust port 351 containing a small amount of dust particles can suck the dust in the storage chamber 35, so that all the dust is sucked away by the suction pump set at the port of the exhaust port 351, thereby realizing centralized collection and processing of dust and ensuring the normal dust storage work of the rotary chamber 32.

[0057] Working principle: When the air guide frame 3 is pulled and moved laterally away from the stacked circuit boards, the protrusion 31 actively slides with the inclined surface and moves toward the inside of the fan outlet 2 in a retracted state. At this time, the existence of the protrusion 31 causes the hinged position at the end of the air guide frame 3 to deflect, so as to bring the outlet ports of the air guide frame 3 closer and smaller, so as to make the discharged ion wind speed higher, so that the air guide frame 3 in the away state can make the wind speed higher to compensate for the reduced static electricity removal effect caused by the increased spacing. On the contrary, when the air guide frame 3 is close to the stacked circuit boards, the port of the air guide frame 3 is expanded to diffuse the wind speed and become more The air flow in the air guide frame 3 is diverted by the filter element 4 and enters the rotary cavity 32 from the inlet 321, so that the air flow flows in a spiral in the rotary cavity 32 and converges on the inner side of the spiral, that is, the retention section 322, so that the residual dust in the air flow is retained by the retention section 322, so as to reduce the dust contained in the air flow flowing in the air guide frame 3, reduce the wear of the filter element 4, and the air flow discharged from the port of the air guide frame 3 contains less dust, so as to ensure the ion anti-static effect on the stacked circuit boards.

[0058] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A circuit board circuit testing device, comprising a device box (1) provided with a fan outlet (2), characterized in that: It also comprises an air guide frame (3) movable in the fan air outlet (2), the fan air outlet (2) port being provided with an inclined surface, and a protrusion (31) being fixedly mounted on the air guide frame (3) and being slidably assembled with the inclined surface; The protrusion (31) under the sliding assembly drives the ports of the air guide frame (3) to open and close / close together, so that the spacing between the ports of the air guide frame (3) is adjustable.

2. A circuit board test device according to claim 1, characterized in that: The air guide frame (3) is provided with a filter element (4) assembled with a sealing plate (41); in a closed state, the air guide frame (3) and the sealing plate (41) are slidably matched and squeeze the filter element (4) so ​​that its inclination angle is adjustable.

3. A circuit board circuit testing device according to claim 2, characterized in that: The convex block (31) is provided with a rotary cavity (32), and a port of the rotary cavity (32) is provided with an inlet (321) connected to a port of the air guide frame (3); The rotary chamber (32) is provided with a retention section (322) for the airflow in the air guide frame (3).

4. A circuit board circuit testing device according to claim 3, characterized in that: A swing plate (33) equipped with an arc-shaped protrusion is hingedly provided in the inlet (321), and the airflow guided by the inlet (321) cooperates with the arc-shaped protrusion to enable the swing plate (33) to move repeatedly.

5. A circuit board test device according to claim 4, characterized in that: A storage cylinder (34) with a through hole (342) is rotatably disposed inside the swing plate (33). In a repeatedly moving state, the swing plate (33) intermittently connects the retention section (322) to the through hole (342).

6. A circuit board test device according to claim 5, characterized in that: The protrusion (31) is provided with a storage cavity (35), an inclined sheet (341) is fixedly mounted on the end of the storage cylinder (34), and a notch (42) is provided on the sealing plate (41); In the sliding state, the sealing plate (41) causes the notch (42) to pull the inclined sheet (341) to rotate the storage cylinder (34) and causes the through hole (342) to communicate with the storage chamber (35).

7. A circuit board test device according to claim 6, characterized in that: The end of the swing plate (33) is provided with a discharge port (351), and the discharge port (351) is connected to the storage chamber (35).

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