Defect detector for large-size printed circuit board

Abstract

The utility model discloses a defect detector for a large-size printed circuit board, which relates to the field of printed circuit board processing and comprises a bottom plate, the top of the bottom plate is respectively provided with a soot blowing assembly and a detection cover, and the soot blowing assembly comprises a soot removing cover mounted at the top of the bottom plate and a soot falling opening formed in the bottom plate. A flow dividing pipe is installed on the back of the dust removing cover. According to the utility model, through the arrangement of the dust blowing assembly, when the circuit board enters the dust removal cover, the fan can be started, the fan works to extract external air, the dust screen can filter the entered air, and the air enters the shunting pipe through the air delivery pipe and then is sprayed out through the air spraying pipe, so that dust on the circuit board can be blown up; and the dust is blown towards the air outlet, so that the dust on the circuit board can be cleaned, the dust is prevented from being accumulated on the circuit board to influence the subsequent detection effect, and the accuracy of defect detection of the circuit board can be further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to printed wiring board processing field, concretely is a kind of large size printed wiring board defect detector. BACKGROUND

[0002] Circuit board is important electronic component, is the carrier of electrical connection of electronic component, at present, circuit board inevitably will appear in the manufacturing process False soldering, missed welding and missing parts and other surface defects, these surface defects can lead to circuit board after power on cannot be used normally;In order to ensure the production quality of circuit board, surface defect detection equipment is usually used to detect the surface defects of circuit board.

[0003] According to the announcement number CN216386827U of Chinese patent, a kind of printed wiring board finished product defect detection device is disclosed, the utility model makes that clamping block can be moved to the corner of printed wiring board, so that clamping block can be fixed to printed wiring board clamping, reaches the effect of automatic fixed clamping, so not only reduce the operation process, simultaneously reduce the operation time, to improve operation efficiency, while reducing the working intensity of staff.

[0004] For the above-mentioned patent content disclosed, by being provided with detection mechanism, in order to detect circuit board, but due to the dust that can be accumulated on circuit board, and it is difficult to clean the dust on circuit board before entering to detection mechanism, part of dust can cover the defect part on circuit board, to reduce the accuracy of detection mechanism to circuit board detection, and reduce detection effect. UTILITY MODEL CONTENT

[0005] Therefore, the utility model aims at providing a kind of large size printed wiring board defect detector to solve the technical problem that dust on circuit board is not cleaned and then affects detection accuracy.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of large size printed wiring board defect detector, including bottom plate, the top of the bottom plate is respectively provided with dust blowing assembly and detection cover, the dust blowing assembly includes dust removal cover installed on the top of bottom plate and ash drop opening opened in the bottom plate, the back of dust removal cover is installed with shunt pipe, and multiple jet pipes extending to the inside of dust removal cover are installed on shunt pipe, the top of dust removal cover is installed with fan, and the air inlet end of fan is connected with suction tube, and the air outlet end of fan is connected with gas conveying pipe extending to the inside of shunt pipe, the outer surface of dust removal cover is opened with air outlet, and filter screen is installed in the inside of air outlet, and two guide rods are installed on the inside upper portion of air outlet, dust scraping plate is sleeved between the two guide rods, and threaded rod is connected to the top of dust scraping plate by bearing, the bottom of ash drop opening is clamped with plugging plate, and soft curtain is arranged on the both sides of dust removal cover.

[0007] By adopting the above technical scheme, when the circuit board enters the inside of the dust removal cover, the fan can be started, the fan works to extract external air, the air enters the inside of the shunt pipe through the air supply pipe, and then is sprayed out through the air injection pipe.

[0008] Further, the port of the air extraction pipe is provided with a dust screen, the top end of the threaded rod extends to the top of the dust removal cover and is connected with a handle, and the threaded rod is threadedly connected with the dust removal cover.

[0009] By adopting the above technical scheme, if it is necessary to clean the dust attached to the filter screen, the threaded rod can be rotated by the handle, so that the threaded rod moves, and the dust scraping plate moves when the threaded rod moves.

[0010] Further, the dust blowing assembly further comprises a sliding groove formed in the bottom of the bottom plate, a spring and a sliding rod are respectively installed in the inside of the sliding groove, a sliding plate is sleeved on the outer wall of the sliding rod, and a baffle is arranged at the bottom of the sliding plate.

[0011] By adopting the above technical scheme, when the dust needs to be discharged, the baffle can be pushed to move the sliding plate, the sliding plate presses the spring, the spring is stressed and compressed, and the sliding plate is conveniently pushed to reset and move.

[0012] Further, one end of the spring is connected with the sliding plate, the sliding plate is slidably connected with the sliding groove, and the top of the baffle is attached to the bottom of the blocking plate.

[0013] By adopting the above technical scheme, the baffle can shield and limit the blocking plate, so as to prevent the blocking plate from falling off the dust falling port at will.

[0014] Further, a CCD detection device is installed at the top of the inside of the detection cover, and a light supplementing lamp is installed on both sides of the inside of the detection cover.

[0015] By adopting the above technical scheme, the CCD detection device can take images of the circuit board, so as to facilitate detection of defects of the circuit board.

[0016] Further, a recess is further formed in the top of the bottom plate, a motor is installed on one side of the bottom plate, a lead screw extending into the recess is connected to the output end of the motor, and a threaded seat is sleeved on the outer wall of the lead screw.

[0017] By adopting the above technical scheme, when the circuit board needs to be sent into the detection cover, the motor can be started, the motor works to drive the lead screw to rotate, and then drives the threaded seat to move.

[0018] Further, a placing table is installed on the top of the threaded seat, and two fixed plates are installed on the top of the placing table.

[0019] By adopting the technical scheme, the staff can conveniently place the circuit board on the placing table, and the threaded seat moves to drive the placing table to move.

[0020] Further, the fixing plate is threadedly connected with a threaded shaft, one end of the threaded shaft is connected with a clamping plate through a bearing, and the other end of the threaded shaft is provided with a knob.

[0021] By adopting the technical scheme, when the circuit board needs to be clamped, the knob is rotated to rotate the threaded shaft, and the threaded shaft drives the clamping plate to move, so that the clamping plate can clamp and limit the circuit board.

[0022] Further, the outer surface of the detection cover is provided with a control panel, and the control panel is electrically connected with the CCD detection device, the light supplementing lamp, the motor and the fan.

[0023] By adopting the technical scheme, the CCD detection device, the light supplementing lamp, the motor and the fan can be started or stopped through the control panel.

[0024] Further, the plugging plate is matched with the ash falling port, and the ash falling port is located directly below the ash scraping plate.

[0025] By adopting the technical scheme, the plugging plate can plug the ash falling port to prevent air and dust from being discharged through the ash falling port at will.

[0026] In summary, the utility model mainly has the following beneficial effects:

[0027] 1. The dust blowing assembly is arranged, when the circuit board enters the inside of the dust removing cover, the fan can be started, the fan works to extract external air, the dust screen can filter the entering air, the air enters the inside of the shunt pipe through the gas conveying pipe, and is sprayed out through the air jet pipe, so that the dust on the circuit board is blown up, and the dust is blown to the air outlet direction, the dust on the circuit board is cleaned in this way, dust accumulation on the circuit board is prevented, and the detection effect is affected, and the accuracy of the circuit board defect detection is improved.

[0028] 2. The filter screen, the ash scraping plate, the guide rod and the threaded rod are arranged, the filter screen can prevent dust from being discharged from the air outlet, and a large amount of dust is prevented from scattering outside the device, when the dust attached to the filter screen needs to be scraped, the threaded rod is rotated, the threaded rod moves downward and drives the ash scraping plate to move downward, the ash scraping plate can scrape the dust attached to the filter screen, and the dust falls into the ash falling port, in this way, the dust attached to the filter screen can be quickly cleaned, and the filter screen is prevented from being blocked by dust.

[0029] 3. The soft curtain is arranged, the soft curtain can shield the two sides of the dust removing cover, and the amount of dust blown out from the side of the dust removing cover is reduced.

[0030] 4、The utility model discloses through being provided with the plugging board, baffle, spring and sliding plate, when the dust in the ash falling port needs to be cleaned, can push baffle, make baffle remove no longer shield plugging board, at this moment can take out plugging board from the ash falling port, and the dust in the ash falling port will drop, thereby can clean the dust in the ash falling port quickly. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is the whole three -dimensional structure schematic diagram of the utility model;

[0032] Figure 2 It is the whole back structure schematic diagram of the utility model;

[0033] Figure 3 It is the whole positive section structure schematic diagram of the utility model;

[0034] Figure 4 It is the dust cover side section structure schematic diagram of the utility model;

[0035] Figure 5 It is the dust cover section structure schematic diagram of the utility model;

[0036] Figure 6 It is the filter screen structure schematic diagram of the utility model;

[0037] Figure 7 It is the thread seat three -dimensional structure schematic diagram of the utility model;

[0038] Figure 8 It is the Figure 4 Enlarged structure schematic diagram of A place in the utility model.

[0039] In the drawing: 1, bottom plate;2, recess;3, screw rod;4, motor;5, threaded seat;6, placing table;7, fixed plate;8, threaded shaft;9, blowing assembly;901, dust cover;902, soft curtain;903, fan;904, air extraction pipe;905, dust screen;906, gas delivery pipe;907, shunt pipe;908, air injection pipe;909, air outlet;910, filter screen;911, threaded rod;912, dust scraping plate;913, guide rod;914, ash falling port;915, plugging board;916, baffle;917, sliding groove;918, sliding plate;919, spring;920, sliding rod;10, clamp plate;11, limiting rod;12, detection cover;13, CCD detection device;14, light supplementing lamp;15, control panel. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are used only for explaining the utility model, and cannot be understood as limiting the utility model.

[0041] The embodiments will be described below according to the overall structure of the utility model.

[0042] Embodiment one:

[0043] A large-size printed circuit board defect detector, as shown in Figures 1-8 The dust removal cover 901 is provided with a plurality of air injection pipes 908 extending into the dust removal cover 901, the plurality of air injection pipes 908 are equidistantly distributed on the shunt pipe 907, the top of the dust removal cover 901 is provided with a fan 903, the air inlet end of the fan 903 is connected with an air extraction pipe 904, and the air outlet end of the fan 903 is connected with a gas conveying pipe 906 extending into the shunt pipe 907, when the circuit board enters into the dust removal cover 901, the fan 903 can be started, the fan 903 works to extract external air, the air enters into the shunt pipe 907 through the gas conveying pipe 906, and is sprayed out through the air injection pipe 908.

[0044] Specifically, the outer surface of the dust removal cover 901 is provided with an air outlet 909, the inside of the air outlet 909 is provided with a filter screen 910, the inside of the air outlet 909 is provided with two guide rods 913, a dust scraping plate 912 is sleeved between the two guide rods 913, the top of the dust scraping plate 912 is connected with a threaded rod 911 through a bearing, the bottom of the dust falling port 914 is provided with a blocking plate 915, and the two sides of the dust removal cover 901 are provided with soft curtains 902.

[0045] Specifically, the port of the air extraction pipe 904 is provided with a dust screen 905, the top end of the threaded rod 911 extends to the top of the dust removal cover 901 and is connected with a handle, the threaded rod 911 is threadedly connected with the dust removal cover 901, if it is necessary to clean the dust attached to the filter screen 910, the threaded rod 911 can be rotated through the handle, so that the threaded rod 911 moves, the threaded rod 911 moves to drive the dust scraping plate 912 to move, the outer surface of the dust scraping plate 912 is attached to the back of the filter screen 910, the dust scraping plate 912 is slidingly connected with the guide rod 913, the length of the dust scraping plate 912 is the same as that of the filter screen 910, so that the dust attached to the filter screen 910 can be scraped and cleaned, and the filter screen 910 is prevented from being blocked by the dust.

[0046] Reference is made to Figures 1-5The inside of the detection cover 12 is provided with a CCD detection device 13, which can take images of the circuit board and facilitate detection of defects in the circuit board. The top of the bottom plate 1 is provided with a groove 2, and the bottom plate 1 is provided with a motor 4. The output end of the motor 4 is connected with a lead screw 3 extending into the groove 2, and the outer wall of the lead screw 3 is sleeved with a threaded seat 5. When the circuit board needs to be sent into the detection cover 12, the motor 4 can be started. The motor 4 can drive the lead screw 3 to rotate, thereby driving the threaded seat 5 to move. The top of the threaded seat 5 is provided with a placing table 6. The inside of the detection cover 12 is provided with a light supplementing lamp 14 on both sides, which facilitates light supplementing and improves the clarity of image shooting of the CCD detection device 13. The outer surface of the detection cover 12 is provided with a control panel 15, which is electrically connected with the CCD detection device 13, the light supplementing lamp 14, the motor 4 and the fan 903, so as to start or stop the CCD detection device 13, the light supplementing lamp 14, the motor 4 and the fan 903 through the control panel 15.

[0047] Example two:

[0048] On the basis of the above-mentioned example one, in order to prevent the circuit board from moving during detection and affecting the detection effect, the following structure is set to clamp and limit the circuit board.

[0049] Referring to Figures 1-4 The top of the placing table 6 is provided with two fixed plates 7, which facilitate the workers to place the circuit board on the placing table 6. When the threaded seat 5 moves, it drives the placing table 6 to move. The fixed plates 7 are threadedly connected with threaded shafts 8, one end of each threaded shaft 8 is connected with a clamping plate 10 through a bearing, and the clamping plate 10 is provided with two limit rods 11 penetrating through the fixed plates 7. The clamping plate 10 is also provided with rubber pads to prevent the clamping plate 10 from rotating with the threaded shaft 8 and improve the stability of the clamping plate 10 when moving. The other end of each threaded shaft 8 is provided with a knob. When the circuit board needs to be clamped, the knob can be rotated to rotate the threaded shaft 8, which drives the clamping plate 10 to move, so that the clamping plate 10 can clamp and limit the circuit board.

[0050] Example three:

[0051] On the basis of the above-mentioned example one, in order to prevent the sealing plate 915 from falling out of the ash falling hole 914 at will and improve the stability of the sealing plate 915, the following structure is set.

[0052] Specific, the soot blowing assembly 9 further comprises a chute 917 opened at the bottom of the bottom plate 1, the inner part of the chute 917 is respectively provided with a spring 919 and a sliding rod 920, the outer wall of the sliding rod 920 is sleeved with a sliding plate 918, and the bottom of the sliding plate 918 is provided with a baffle 916, when the ash needs to be discharged, the baffle 916 can be pushed to move the sliding plate 918, the sliding plate 918 extrudes the spring 919, the spring 919 is compressed under stress, the baffle 916 no longer limits the blocking plate 915, and then the blocking plate 915 can be removed, at this time the dust in the ash falling port 914 falls downward, one end of the spring 919 is connected with the sliding plate 918, the sliding plate 918 is slidably connected with the chute 917, the top of the baffle 916 is attached with the bottom of the blocking plate 915, the baffle 916 can shield and limit the blocking plate 915, preventing the blocking plate 915 from falling from the ash falling port 914 at will, the blocking plate 915 is matched with the ash falling port 914, and the ash falling port 914 is located directly below the ash scraping plate 912; the blocking plate 915 can block the ash falling port 914, preventing air and dust from passing through the ash falling port 914 and being discharged at will.

[0053] The working principle of the utility model is as follows: firstly, the staff can install the device and connect the power supply, then place the circuit board on the top of the placing table 6, then rotate a threaded shaft 8 first, so that the threaded shaft 8 drives the clamping plate 10 to move, so that the clamping plate 10 can be attached to the side edge of the circuit board, then rotate another threaded shaft 8, so that the other clamping plate 10 moves and is attached to the circuit board, the cooperation of the two clamping plates 10 can clamp and limit the circuit board, then start the motor 4, the motor 4 can drive the lead screw 3 to rotate, the lead screw 3 drives the threaded seat 5 to move, then drives the placing table 6 to move, the placing table 6 drives the circuit board to move, so that the circuit board first enters the dust removal cover 901 through the left soft curtain;

[0054] At this time, the fan 903 is started, the fan 903 can extract external air, the dust screen 905 can filter the entering air, the air enters the shunt pipe 907 inside through the air inlet pipe 906, and then is sprayed out through the air outlet pipe 908, so as to blow up the dust on the circuit board, and blow the dust to the air outlet 909 direction, in this way, the dust on the circuit board can be cleaned, then the circuit board enters the detection cover 12 through the right soft curtain, and the CCD detection device 13 can image the circuit board, which is convenient for detecting the circuit board, and the light supplementing lamp 14 can provide illumination, which is convenient for light supplementing;

[0055] The setting of the filter screen 910 can prevent dust from being discharged from the air outlet 909, and when the dust attached to the filter screen 910 needs to be scraped off, the staff can rotate the threaded rod 911, so that the threaded rod 911 moves downward and drives the ash scraping plate 912 to move downward, the ash scraping plate 912 can scrape off the dust attached to the filter screen 910, so that the dust falls into the ash falling port 914;

[0056] When the dust in the dust falling port 914 needs to be cleaned, the staff can place the collection box below the dust falling port 914, then push the baffle 916 so that the baffle 916 moves and no longer blocks the sealing plate 915, at this time the sealing plate 915 can be taken out from the dust falling port 914, the dust in the dust falling port 914 falls downward and falls into the collection box, so the dust in the dust falling port 914 can be quickly cleaned.

[0057] Although the embodiments of the utility model have been shown and described, the specific embodiments are only the explanation of the utility model, and are not the limitation of the utility model, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable way, and the person skilled in the art can make the modification, replacement and change of the embodiments without the creative contribution after reading the specification without departing from the principles and the purpose of the utility model, but as long as in the scope of the claims of the utility model, it is protected by the patent law.

Claims

1. A large-sized printed wiring board defect detector comprising a base plate (1), characterized in that: The top of the bottom plate (1) is respectively provided with a soot blowing assembly (9) and a detection cover (12), the soot blowing assembly (9) comprises a soot removal cover (901) mounted on the top of the bottom plate (1) and a soot falling opening (914) formed in the bottom plate (1), the back of the soot removal cover (901) is provided with a shunt pipe (907), a plurality of jet pipes (908) extending into the soot removal cover (901) are mounted on the shunt pipe (907), the top of the soot removal cover (901) is provided with a fan (903), the air inlet end of the fan (903) is connected with an air exhaust pipe (904), the air outlet end of the fan (903) is connected with a gas conveying pipe (906) extending into the shunt pipe (907), the outer surface of the soot removal cover (901) is provided with an air outlet (909), the inside of the air outlet (909) is provided with a filter screen (910), the inside of the air outlet (909) is provided with two guide rods (913) above, a soot scraping plate (912) is sleeved between the two guide rods (913), the top of the soot scraping plate (912) is connected with a threaded rod (911) through a bearing, and the bottom of the soot falling opening (914) is clamped with a blocking plate (915), and the two sides of the soot removal cover (901) are provided with soft curtains (902).

2. The apparatus according to claim 1, wherein: The port of the air exhaust pipe (904) is provided with a dust screen (905), the top end of the threaded rod (911) extends to the top of the soot removal cover (901) and is connected with a handle, and the threaded rod (911) is threadedly connected with the soot removal cover (901).

3. The apparatus according to claim 1, wherein the apparatus further comprises a light source and a light detector. The soot blowing assembly (9) further comprises a chute (917) formed in the bottom of the bottom plate (1), the inside of the chute (917) is respectively provided with a spring (919) and a sliding rod (920), the outer wall of the sliding rod (920) is sleeved with a sliding plate (918), and the bottom of the sliding plate (918) is provided with a baffle (916).

4. The apparatus according to claim 3, wherein the apparatus further comprises a light source and a light detector. One end of the spring (919) is connected with the sliding plate (918), the sliding plate (918) is slidably connected with the chute (917), and the top of the baffle (916) is attached to the bottom of the blocking plate (915).

5. The apparatus according to claim 1, wherein: The inside of the detection cover (12) is provided with a CCD detection device (13) above, and the inside of the detection cover (12) is provided with a light supplementing lamp (14) on both sides.

6. The apparatus according to claim 1, wherein: The top of the bottom plate (1) is further provided with a recess (2), one side of the bottom plate (1) is provided with a motor (4), the output end of the motor (4) is connected with a lead screw (3) extending into the recess (2), and the outer wall of the lead screw (3) is sleeved with a threaded seat (5).

7. The apparatus according to claim 6, wherein: The top of the threaded seat (5) is provided with a placing table (6), and the top of the placing table (6) is provided with two fixed plates (7).

8. The apparatus according to claim 7, wherein the apparatus further comprises a light source for illuminating the large-sized printed wiring board. The fixed plates (7) are threadedly connected with threaded shafts (8), one end of the threaded shaft (8) is connected with a clamping plate (10) through a bearing, and the other end of the threaded shaft (8) is provided with a knob.

9. The apparatus according to claim 1, wherein: The outer surface of the detection cover (12) is provided with a control panel (15), and the control panel (15) is electrically connected with the CCD detection device (13), the light supplementing lamp (14), the motor (4) and the fan (903).

10. The apparatus according to claim 1, wherein: The closing plate (915) is fitted with a dust fall opening (914) located directly below the dust scraping plate (912).

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