Circuit board quality inspection equipment

Abstract

The utility model discloses circuit board quality inspection equipment which comprises a machine base, a workbench, a detection lamp, a detection mechanism, a conveying device and a controller are arranged on the machine base, and the workbench is horizontally arranged; the detection lamp is located above the workbench; the detection mechanism comprises a plurality of photosensitive elements which are uniformly laid in the front-back direction and the left-right direction and is arranged on the workbench; the two conveying devices are symmetrically arranged in the front-back direction, each conveying device comprises a detection conveying mechanism laid in the left-right direction and two material preparation conveying mechanisms, and the detection conveying mechanism is located between the two material preparation conveying mechanisms; when the circuit board is conveyed to the detection conveying mechanism and located at the detection position, the controller closes the conveying device, the photosensitive element corresponding to the hole of the circuit board sends a signal to the controller, and the controller compares the signal of the photosensitive element corresponding to the standard circuit board. According to the utility model, the technical problems of low qualified rate and low efficiency caused by easy detection omission in the existing manual detection can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit board production equipment, and particularly relates to a circuit board quality inspection device. Background Art

[0002] Before leaving the factory, the circuit board needs to be inspected for quality, such as whether the drilling holes are blocked, whether the tin paths are complete, and whether the circuit board has defects, etc., to avoid the dust generated by drilling from blocking the holes.

[0003] The existing circuit boards are generally inspected for appearance manually. However, the manual inspection efficiency is low. Moreover, since the circuit board needs to be electrically connected and fixed with multiple electronic components, etc., during the production and processing of the circuit board, a variety of holes need to be drilled, including screw holes, reserved holes, and through-board holes, etc. When manually inspecting the holes of the circuit board, due to the large number of drilled holes, it is easy to miss the inspection, resulting in a low qualified rate of the circuit board, which affects the installation and use of the circuit board. Content of the Utility Model

[0004] The purpose of the utility model is to provide a circuit board quality inspection device to solve the technical problems in the prior art that manual inspection is prone to missed inspection, resulting in a low qualified rate and low efficiency of the circuit board after quality inspection.

[0005] The technical solution adopted to solve the above technical problems:

[0006] The utility model discloses a circuit board quality inspection device, which includes a machine base, and the following are provided on the machine base:

[0007] A workbench, the workbench is horizontally arranged;

[0008] A detection lamp, the detection lamp is located above the workbench;

[0009] A detection mechanism, the detection mechanism includes a plurality of photosensitive elements, and the plurality of photosensitive elements are uniformly laid on the workbench in the front-back direction and the left-right direction;

[0010] A conveying device, there are two conveying devices and they are symmetrically arranged in the front-back direction. Each conveying device includes a detection transportation mechanism laid in the left-right direction and two stockpiling transportation mechanisms, and the detection transportation mechanism is located between the two stockpiling transportation mechanisms;

[0011] A controller, the controller is configured such that when the circuit board is conveyed to the two detection transportation mechanisms and is at the detection position, the controller turns off the conveying device, and the photosensitive elements corresponding to the holes of the circuit board send signals to the controller, and the controller compares the signals of the photosensitive elements corresponding to the standard circuit board.

[0012] The beneficial effects of the present utility model at least include: Before conducting quality inspection on the circuit board, the worker first places the standard circuit board at the inspection positions of the two inspection and transportation mechanisms. The controller turns on the inspection lamp and saves the signals sent by the corresponding photosensitive units, and then takes out the standard circuit board. Then, the conveying device is started. When the circuit board to be inspected is at the inspection position, the controller turns off the conveying device. At this time, the light emitted by the inspection lamp passes through the holes of the circuit board and irradiates on the photosensitive elements. The multiple irradiated photosensitive elements send signals to the controller. The controller compares the signals received from the circuit board with the signals sent by the saved standard circuit board. If there are too many, too few, or mis-drilled holes in the circuit board, the signals sent by the corresponding photosensitive elements of the circuit board to the controller will be different from those of the standard circuit board, quickly obtaining information on whether the inspected circuit board is qualified, and there will be no omission in hole detection, improving the qualified rate after circuit board quality inspection.

[0013] The conveying device can automatically input or output the circuit boards to be inspected, eliminating the need for workers to constantly put in or take out the circuit boards, improving the quality inspection efficiency.

[0014] As a further improvement of the above technical solution, the machine base includes a display mechanism, and the controller is configured to start the display mechanism when the detection of the photosensitive element corresponding to the circuit board is different from that of the photosensitive element corresponding to the standard circuit board.

[0015] Through the above setting, the machine base includes a display mechanism. When the controller compares the photosensitive elements and finds that the circuit board is unqualified, the controller starts the display mechanism, and the display mechanism prompts the worker that the inspected circuit board is unqualified, facilitating the worker to timely and quickly take out the unqualified circuit board.

[0016] As a further improvement of the above technical solution, the display mechanism is a display lamp or a speaker.

[0017] Through the above setting, the worker is prompted to take out the unqualified circuit board by means of light or sound.

[0018] As a further improvement of the above technical solution, the machine base is provided with a pushing mechanism. The output end of the pushing mechanism moves linearly in the front-rear direction and is connected to the two inspection and transportation mechanisms. The controller is configured to start the pushing mechanism when the detection of the photosensitive element on the circuit board is different from that of the standard circuit board.

[0019] Through the above setting, when the circuit board quality inspection is unqualified, the controller starts the pushing mechanism, pushing out the two inspection and transportation mechanisms and the unqualified circuit board between them in the front-rear direction, facilitating the controller to start the two inspection and transportation mechanisms again to output the unqualified circuit board between them to other conveyor belts or storage boxes, etc.

[0020] As a further improvement of the above technical solution, the pushing mechanism includes a pushing drive source, a push rod and an electromagnetic lock. The pushing drive source is connected to the machine base. The output end of the pushing drive source is connected to the push rod. The push rod is respectively connected to the electromagnetic lock and the detection and transportation mechanism at the rear end. One end of the push rod away from the pushing drive source penetrates through the detection and transportation mechanism at the front end. After the electromagnetic lock is powered on, it is magnetically connected to the detection and transportation mechanism at the front end.

[0021] With the above arrangement, the pushing drive source drives the push rod to move back and forth, thereby driving the two detection and transportation mechanisms connected to the push rod to move back and forth. After being pushed out, the controller turns off the pushing mechanism and powers off the electromagnetic lock. Inertia causes the detection and transportation mechanism at the front end to continue to move out, and the unqualified circuit board can fall downward from the gap between the two, without repeatedly turning on and off the detection and transportation mechanism.

[0022] As a further improvement of the above technical solution, the detection and transportation mechanism at the front end is provided with a magnetic member corresponding to the electromagnetic lock.

[0023] With the above arrangement, the energized electromagnetic lock emits a strong magnetic force, thereby magnetically connecting to the detection and transportation mechanism connected with the magnetic member, realizing the detachable connection of the detection and transportation mechanism at the front end.

[0024] As a further improvement of the above technical solution, the pushing mechanism is provided with a limiting mechanism in cooperation. The limiting mechanism includes an extending limiting member and a retracting limiting member. The controller is configured to turn off the pushing mechanism when the detection and transportation mechanism is respectively in contact with the extending limiting member and the retracting limiting member.

[0025] With the above arrangement, the limiting mechanism is used to limit the moving positions of the two detection and transportation mechanisms. The extending limiting member prevents the moving path of the detection and transportation mechanism from being too long, reducing the quality inspection efficiency of the circuit board; the retracting limiting member is used to accurately retract the detection and transportation mechanism to its original position, ensuring that the detection and transportation mechanism can input and output the circuit board from the two feeding and transportation mechanisms.

[0026] As a further improvement of the above technical solution, the machine base is connected with a positioning drive source. The output end of the positioning drive source moves linearly in the up and down direction and is connected with a positioning member. The positioning member is located between the detection and transportation mechanism and the feeding and transportation mechanism for outputting the circuit board.

[0027] With the above settings, the positioning drive source drives the positioning member to move up and down, so that the positioning member extends upward between the detection transport mechanism and the stock preparation transport mechanism for outputting the circuit board, so as to accurately position the circuit board at the detection position. When the circuit board passes the quality inspection, the positioning drive source drives the positioning member to move down, so that the circuit board can be transported from the detection transport mechanism to the stock preparation transport mechanism.

[0028] As a further improvement of the above technical solution, the workbench is provided with a chute extending forward and backward, and the conveying device at the front end is slidably connected to the chute.

[0029] With the above settings, the front-back position between the two conveying devices is adjusted, so that the circuit board quality inspection device is applicable to circuit boards of different sizes, and the versatility of the circuit board quality inspection device is improved.

[0030] As a further improvement of the above technical solution, the machine base is provided with a locking member, and the opposite ends of the locking member are respectively connected to the workbench and the conveying device at the front end.

[0031] With the above settings, the relatively sliding workbench and the conveying device at the front end are locked and fixed by the locking member. Description of the Drawings

[0032] The following further describes the present utility model in conjunction with the drawings and embodiments;

[0033] Figure 1 is the overall structural schematic diagram of the circuit board quality inspection device provided by the embodiment of the present utility model;

[0034] Figure 2 is the front cross-sectional view of the circuit board quality inspection device provided by the embodiment of the present utility model;

[0035] Figure 3 is the side cross-sectional view of the circuit board quality inspection device provided by the embodiment of the present utility model.

[0036] The reference signs in the drawings are as follows:

[0037] 100, machine base; 110, workbench; 120, chute;

[0038] 200, detection lamp;

[0039] 300, detection mechanism; 310, photosensitive element;

[0040] 400, conveying device; 410, detection transport mechanism; 420, stock preparation transport mechanism;

[0041] 500, pushing mechanism; 510, pushing drive source; 520, push rod;

[0042] 600, circuit board;

[0043] 710, positioning drive source; 720, positioning member;

[0044] 810, lead screw motor; 820, lead screw; 830, nut seat. Detailed implementation manners

[0045] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be construed as a limitation on the protection scope of the present invention.

[0046] In the description of the present invention, it should be understood that for the orientation description, such as the upper, lower, front, rear, left, right, etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present invention.

[0047] In the description of the present invention, if there are words such as "several" for description, its meaning is one or more, and the meaning of multiple is two or more. Understand that greater than, less than, exceeding, etc. do not include the present number, and above, below, within, etc. include the present number. If there is a description of first, second, third, etc., it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0048] It should be noted that in the drawings, the X direction points from the rear side to the front side of the circuit board quality inspection device; the Y direction points from the right side to the left side of the circuit board quality inspection device; the Z direction points from the lower side to the upper side of the circuit board quality inspection device.

[0049] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0050] Refer to Figures 1 to 3 , and several embodiments of the circuit board quality inspection device of the present invention are given below.

[0051] As Figures 1 to 3 shown, the circuit board quality inspection device of the embodiment of the present invention includes a machine base 100, and a workbench 110, a detection lamp 200, a detection mechanism 300, a conveying device 400 and a controller are provided on the machine base 100.

[0052] It can be understood that the machine base 100 is provided with a horizontal workbench 110 to provide a detection space for the circuit board 600, such as Figure 1 and Figure 2 shown.

[0053] It can be understood that the detection lamp 200 is located above the workbench 110, as Figures 1 to 3 shown. The uniform light emitted downward by the detection lamp 200, when the circuit board 600 is located between the detection lamp 200 and the workbench 110, the light emitted by the detection lamp 200 passes through the holes of the circuit board 600 and leaves corresponding light spots on the workbench 110.

[0054] It can be understood that the detection mechanism 300 is used to detect the light spots left on the workbench 110 by the detection lamp 200 passing through the holes of the circuit board 600. Specifically, the detection mechanism 300 includes a plurality of photosensitive elements 310, and the plurality of photosensitive elements 310 are evenly laid on the upper end surface of the workbench 110, as Figure 3 shown, so that the detection mechanism 300 can detect different holes of different circuit boards 600, improving the versatility of the circuit board quality inspection equipment.

[0055] In this embodiment, the plurality of photosensitive elements 310 are evenly laid in the front-rear direction, and the plurality of photosensitive elements 310 are also evenly laid in the left-right direction. The distance between the plurality of photosensitive elements 310 is small, so that the holes with different diameters and positions on the circuit board 600 can be detected by the detection mechanism 300.

[0056] It can be understood that the conveying device 400 is used to automatically convey the circuit board 600 and automatically output the circuit board 600 after detection, without manual loading or unloading of the circuit board 600 in the circuit board quality inspection equipment, improving the quality inspection efficiency of the circuit board 600. Specifically, the number of the conveying devices 400 is two and they are linked. The two conveying devices 400 are symmetrically arranged in the front-rear direction, so that the front end and the rear end of the circuit board 600 are respectively conveyed by the corresponding conveying devices 400, avoiding the holes in the middle of the circuit board 600 being covered by the conveying devices 400 and affecting the quality inspection effect of the holes of the circuit board 600.

[0057] In this embodiment, each conveying device 400 includes a detection and transportation mechanism 410 that moves independently and is laid in the left-right direction and two stock preparation and transportation mechanisms 420. The detection and transportation mechanism 410 is located in the middle of the two stock preparation and transportation mechanisms 420, as Figure 1 and Figure 2As shown, a detection position is provided between two detection and transportation mechanisms 410. Therefore, the circuit board 600 is input along the left-right direction through two symmetrically arranged feeding and transportation mechanisms 420 at the front and back. The two detection and transportation mechanisms 410 receive the circuit board 600 on the two feeding and transportation mechanisms 420 and convey the circuit board 600 to the detection position. At this time, the circuit board 600 is located between the detection lamp 200 and the workbench 110. After quality inspection, the circuit board 600 is output through another two symmetrically arranged circuit boards 600 at the front and back, and the circuit board 600 to be quality inspected is automatically input, thereby realizing the automatic conveyance of the circuit board 600.

[0058] It can be understood that the controller is electrically connected to the detection lamp 200, the detection mechanism 300, and the conveying device 400 respectively. Specifically, the worker can start the detection lamp 200, the detection mechanism 300, and the conveying device 400 respectively through the controller.

[0059] With such a setting, before detection, the worker needs to first place the standard circuit board 600 at the detection position and turn on the detection lamp 200 and the detection mechanism 300. At this time, the light of the detection lamp 200 passes through the holes of the standard circuit board 600 and irradiates on some photosensitive components 310. The irradiated photosensitive components 310 send signals to the controller, and the controller saves the information of the photosensitive components 310 corresponding to the standard circuit board 600, and then takes out the standard circuit board 600.

[0060] When the circuit board quality inspection equipment starts detection and starts the conveying device 400, when the circuit board 600 is conveyed to the detection and transportation mechanism 410 and is located at the detection position, the controller turns off the conveying device 400. The closed detection and transportation mechanism 410 makes the circuit board 600 stay at the detection position. At this time, the light of the detection lamp 200 passes through the holes of the circuit board 600 and irradiates on the photosensitive components 310 on the upper end surface of the workbench 110. The irradiated photosensitive components 310 send signals to the controller, and the controller compares the received signals of the circuit board 600 with those of the standard circuit board 600, so as to quickly detect whether there are too many, too few, or mis-drilled holes on the circuit board 600, and avoid the situation of missing some holes in manual detection and low qualification rate.

[0061] After quality inspection is completed, the controller continues to turn on the conveying device 400. The two detection and transportation mechanisms 410 and the two feeding and transportation mechanisms 420 output the circuit boards 600 that have completed detection, and the other two feeding and transportation mechanisms 420 input the circuit boards 600 to be detected, enabling the conveying device 400 to automatically input or output the circuit boards 600 and improving the quality inspection efficiency.

[0062] It can be understood that when the circuit board 600 is in the detection position, the conveying device 400 is closed, which can maintain the spacing between two adjacent circuit boards 600, prevent the circuit board 600 to be detected from colliding with the circuit board 600 being detected, affecting the quality inspection effect of the circuit board 600, and can also prevent the stock preparation and transportation mechanism 420 for outputting the circuit board 600 from consuming too much power.

[0063] In this embodiment, the circuit board 600 is input through the stock preparation and transportation mechanism 420 at the left end and output through the stock preparation and transportation mechanism 420 at the right end.

[0064] It can be understood that both the detection and transportation mechanism 410 and the stock preparation and transportation mechanism 420 are conveyor belts.

[0065] It can be understood that the standard circuit board 600 is a qualified circuit board 600 that has been carefully inspected by workers.

[0066] It can be understood that the machine base 100 includes a display mechanism, and the display mechanism is electrically connected to the controller. When the holes of the circuit board 600 are different from those of the standard circuit board 600, the controller compares the signals of the corresponding photosensitive elements 310 of the two, and at this time, the controller activates the display mechanism to prompt the worker that the detected circuit board 600 is unqualified, so that the worker can timely take out the unqualified circuit board 600 from the conveying device 400.

[0067] In some embodiments, the display mechanism can be a display lamp, which prompts the worker that the detected circuit board 600 does not meet the standard by continuously emitting light or flashing light, facilitating the worker to timely take out the unqualified circuit board 600.

[0068] In other embodiments, the display mechanism can be a speaker, which prompts the worker that the detected circuit board 600 does not meet the standard by sound, facilitating the worker to quickly take out the unqualified circuit board 600.

[0069] In this embodiment, the machine base 100 includes a pushing mechanism 500, as Figure 1 shown, the pushing mechanism 500 is electrically connected to the controller. When the controller compares the signals of the photosensitive elements 310 of the circuit board 600 and the standard circuit board 600 and finds that it is unqualified, the controller activates the pushing mechanism 500.

[0070] It can be understood that the output end of the pushing mechanism 500 moves linearly in the front-rear direction, and the output end of the pushing mechanism 500 is connected to the two detection and transportation mechanisms 410. When the pushing mechanism 500 is activated, the output end of the pushing mechanism 500 drives the two detection and transportation mechanisms 410 to move forward or backward, making the two detection and transportation mechanisms 410 and the stock preparation and transportation mechanism 420 stagger front and back, facilitating the output of the unqualified circuit board 600.

[0071] It can be understood that after the unqualified circuit board 600 is output, the controller starts the pushing mechanism 500 again, so that the output end of the pushing mechanism 500 drives the two detection and transportation mechanisms 410 back to their original positions to continue receiving the circuit boards 600 input by the left stock preparation and transportation mechanism 420.

[0072] With such a setting, when the controller detects an unqualified circuit board 600, it starts the pushing mechanism 500, so as to output the unqualified circuit boards 600 on the two detection and transportation mechanisms 410 to other conveyor belts or collection boxes. There is no need for workers to stay beside the circuit board quality inspection equipment to pick up the unqualified circuit boards 600, making the use of the circuit board quality inspection equipment more intelligent and convenient.

[0073] In some embodiments, after the controller controls the pushing mechanism 500 to push out the two detection and transportation mechanisms 410, the controller can start the two detection and transportation mechanisms 410 to make the two detection and transportation mechanisms 410 output unqualified circuit boards 600.

[0074] It can be understood that the pushing mechanism 500 includes a pushing drive source 510 and a push rod 520, as Figure 3 shown. Specifically, the pushing drive source 510 is fixedly connected to the machine base 100. The output end of the pushing drive source 510 extends in the front-rear direction and is connected to the push rod 520. The push rod 520 extends in the front-rear direction. The front end of the push rod 520 is connected to the detection and transportation mechanism 410 at the front end, and the rear end of the push rod 520 is connected to the detection and transportation mechanism 410 at the rear end. When the pushing drive source 510 is started, the front-rear moving push rod 520 drives the two detection and transportation mechanisms 410 to move back and forth, facilitating the two detection and transportation mechanisms 410 to start outputting unqualified circuit boards 600 and making the qualified circuit boards 600 and unqualified circuit boards 600 output in different paths.

[0075] In this embodiment, the pushing mechanism 500 includes a pushing drive source 510, a push rod 520 and an electromagnetic lock. Specifically, the pushing drive source 510 is connected to the rear end of the push rod 520, and the push rod 520 is connected to the detection and transportation mechanism 410 at the rear end. One end of the push rod 520 away from the pushing drive source 510 passes through the detection and transportation mechanism 410 at the front end, so that the detection and transportation mechanism 410 at the front end can slide back and forth relative to the push rod 520. One end of the push rod 520 away from the pushing drive source 510 is connected to the electromagnetic lock, that is, the front end of the push rod 520 is connected to the electromagnetic lock, and the electromagnetic lock is electrically connected to the controller. The electromagnetic lock is connected in a normally open manner, that is, the electromagnetic lock is basically in an energized state. The energized electromagnetic lock is magnetically connected to the detection and transportation mechanism 410 at the front end, and the pushing drive source 510 can drive the two detection and transportation mechanisms 410 to move back and forth.

[0076] With such a setting, when the controller detects that the holes in the circuit board 600 are unqualified, the controller activates the pushing drive source 510 to push the two detection and transportation mechanisms 410 forward. At this time, the electromagnetic lock is powered on and magnetically connected to the detection and transportation mechanism 410 at the front end. When the two detection and transportation mechanisms 410 move to a suitable position, the controller controls the pushing drive source 510 to turn off and simultaneously disconnects the electromagnetic lock. At this time, the detection and transportation mechanism 410 at the front end continues to slide forward relative to the push rod 520 under the influence of inertia, and the distance between the two detection and transportation mechanisms 410 is greater than the front-back length of the circuit board 600, causing the circuit board 600 located between the two detection and transportation mechanisms 410 to automatically fall down to other conveyor belts or collection boxes. There is no need for the controller to repeatedly control the activation of the detection and transportation mechanism 410, making the use of the circuit board quality inspection device more convenient and the control program simpler. The detection and transportation mechanism 410 can be equipped with a gravity sensor. When the gravity sensor detects that the circuit board 600 has fallen, the controller connects to the circuit board 600 and activates the pushing drive source 510 again, connecting the electromagnetic lock and the detection and transportation mechanism 410 at the front end, and the push rod 520 drives the two detection and transportation mechanisms 410 back above the workbench 110.

[0077] It can be understood that the pushing drive source 510 can be a linear motor, a cylinder, an electric cylinder, etc. The pushing drive source 510 can also be a rotary motor. Correspondingly, the push rod 520 is a lead screw.

[0078] It can be understood that the detection and transportation mechanism 410 at the front end is provided with a magnetic part corresponding to the electromagnetic lock. When the electromagnetic lock is powered on, the electromagnetic lock and the detection and transportation mechanism 410 at the front end are magnetically connected, thereby realizing the connection between the push rod 520 and the detection and transportation mechanism 410 at the front end, and realizing the forward and backward movement of the push rod 520 driving the two detection and transportation mechanisms 410.

[0079] Furthermore, the pushing mechanism 500 is cooperatively provided with a limiting mechanism for limiting the movement routes of the two detection and transportation mechanisms 410.

[0080] It can be understood that the limiting mechanism includes an extended limiting part electrically connected to the controller, and the extended limiting part is used to limit the forward movement position of the two detection and transportation mechanisms 410. When the extended limiting part senses one or both of the detection and transportation mechanisms 410, the controller controls the pushing drive source 510 to turn off, preventing the two detection and transportation mechanisms 410 from moving forward excessively, resulting in too long a pushing path and a retracting path of the pushing mechanism 500, and too long a pushing time for the unqualified circuit board 600, which affects the quality inspection efficiency of the circuit board 600.

[0081] It can be understood that the limiting mechanism includes a retraction limiting member electrically connected to the controller, and the retraction limiting member is used to limit the rearward movement position of the two detection and transportation mechanisms 410. When the retraction limiting member senses one or both of the detection and transportation mechanisms 410, the controller turns off the pushing drive source 510. At this time, the two detection and transportation mechanisms 410 are respectively aligned left and right with the front-end or rear-end stock preparation and transportation mechanisms 420, enabling the circuit board 600 to move from left to right along the output device, avoiding the front-to-back misalignment between the two retracted detection and transportation mechanisms 410 and the left and right stock preparation and transportation mechanisms 420, which may cause the circuit board 600 to be inspected to be unable to be transported to the detection position and the circuit board 600 to be unable to complete the quality inspection.

[0082] It can be understood that the extension limiting member and the retraction limiting member can be limit switches or proximity switches.

[0083] Furthermore, in order to ensure that the circuit board 600 is accurately moved to the detection position, a positioning mechanism is provided on the machine base 100. Specifically, the positioning mechanism includes a positioning drive source 710 and a positioning member 720, as Figure 2 and Figure 3 shown. The positioning drive source 710 is electrically connected to the controller. The output end of the positioning drive source 710 moves linearly in the up and down direction and is connected to the positioning member 720. The positioning member 720 is located between the detection and transportation mechanism 410 and the stock preparation and transportation mechanism 420 for outputting the circuit board 600, that is, the positioning member 720 is located at the right end of the detection and transportation mechanism 410 and the left end of the stock preparation and transportation mechanism 420 at the right end.

[0084] With such a setting, when the controller starts the conveying device 400 to input the circuit board 600 to be inspected, the controller also starts the positioning drive source 710 to move the positioning member 720 upward and higher than the upper end surface of the detection and transportation mechanism 410. When the circuit board 600 is conveyed by the front and rear two conveying devices 400 until it abuts against the positioning member 720, the circuit board 600 is in the detection position. At this time, the right end of the circuit board 600 abuts against the left end surface of the positioning member 720. Baffles for anti-falling and anti-offset are connected to the mutually separated ends of the two detection and transportation mechanisms 410, that is, the front and rear ends of the circuit board 600 are respectively limited by the two baffles, so that the circuit board 600 is accurately in the detection position.

[0085] It can be understood that after the quality inspection, if the quality inspection result of the circuit board 600 is qualified, the controller controls the positioning drive source 710 to start, lower the positioning member 720, and then start the conveying device 400 to output the circuit board 600 along the stock preparation and transportation mechanism 420 at the right end, and start the positioning drive source 710 again before the next circuit board 600 to be inspected reaches the detection position to raise the positioning member 720 again.

[0086] It can be understood that after quality inspection, if the quality inspection structure of the circuit board 600 is unqualified, the controller activates the ejection mechanism 500 to eject the unqualified circuit board 600.

[0087] It can be understood that the positioning drive source 710 can be a linear motor, a cylinder, an oil cylinder, etc., and the positioning member 720 can be a plate to reduce the distance between the detection and transportation mechanism 410 and the stock preparation and transportation mechanism 420.

[0088] It can be understood that the workbench 110 is provided with a chute 120 extending front and back, as Figure 1 and Figure 3 shown. The conveying device 400 at the front end is slidably connected to the chute 120, so as to adjust the distance between the two conveying devices 400, enabling circuit boards 600 of different sizes to be quality inspected by a single circuit board quality inspection device, and improving the versatility of the circuit board quality inspection device. Specifically, the conveying device 400 at the front end is connected with a slider, and the slider slides in the chute 120.

[0089] It can be understood that if the ejection mechanism 500 is provided on the machine base 100, the two stock preparation and transportation mechanisms 420 are slidably connected to the chute 120, and the two stock preparation and transportation mechanisms 420 at the front end adjust their front and back positions through the chute 120. The detection and transportation mechanism 410 at the front end disconnects the electromagnetic lock through the controller. The push rod 520 and the electromagnetic lock are detachably connected, and the front and back distance between the two detection and transportation mechanisms 410 is adjusted by adjusting the connection position between the push rod 520 and the electromagnetic lock. The distance between the two detection and transportation mechanisms 410 can also be adjusted by adjusting the magnetic attraction position between the electromagnetic lock and the detection and transportation mechanism 410 at the front end, so as to realize the adjustment of the front and back position of the conveying device 400 at the front end. When the limiting mechanism senses the detection and transportation mechanism 410 at the front end, both the extended limiting member and the retracted limiting member need to be adjusted in position along with the detection and transportation mechanism 410 at the front end.

[0090] It can be understood that the chute 120 is located at the left end and / or the right end of the detection mechanism 300 to prevent the conveying device 400 at the front end from interfering with the detection mechanism 300 and affecting the quality inspection effect of the circuit board 600.

[0091] It can be understood that the machine base 100 is provided with a locking member, and the opposite ends of the locking member are respectively connected to the workbench 110 and the conveying device 400 at the front end. The locking member is used to lock the conveying device 400 at the front end to the workbench 110, facilitating the fixing of the distance between the two conveying devices 400 after adjusting the position of the conveying device 400 at the front end and ensuring the stable conveyance of the circuit board 600.

[0092] In some embodiments, the locking member can be a bolt connected with a handle. The workbench 110 is provided with a plurality of screw holes communicating with the sliding grooves 120 in the front-rear direction. The screw holes extend in the left-right direction. By turning the handle, one end of the bolt abuts against the conveying device 400 at the front end, so as to firmly abut the conveying device 400 at the front end on the workbench 110.

[0093] In other embodiments, the locking member can be a lead screw motor 810. Specifically, the lead screw 820 of the lead screw motor 810 extends in the front-rear direction and is rotatably connected to the workbench 110. The nut seat 830 of the lead screw motor 810 is connected to the conveying device 400 at the front end. As Figure 3 shown, the lead screw motor 810 is electrically connected to the controller. Workers can start the lead screw motor 810 through the controller, so as to electrically adjust the front-rear position of the conveying device 400 at the front end, which is time-saving and labor-saving.

[0094] In this embodiment, the lead screw motor 810 is embedded in the sliding groove 120, and the nut seat 830 is arranged instead of the slider. As Figure 3 shown.

[0095] It can be understood that the controller can be a single-chip microcomputer or a PCL controller, and can simply realize the control of structures such as the detection mechanism 300 and the conveying device 400.

[0096] The above has specifically described the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present invention. These equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A circuit board quality inspection device, characterized in that: It comprises a base, on which is provided: A workbench, wherein the workbench is arranged horizontally; A detection light, the detection light is located above the workbench; A detection mechanism, the detection mechanism comprising a plurality of photosensitive elements, the plurality of photosensitive elements being evenly laid on the workbench along the front-to-back direction and the left-to-right direction; A conveying device, wherein two conveying devices are provided and are symmetrically arranged along the front-to-back direction, each conveying device comprises a detection conveying mechanism and two material preparation conveying mechanisms laid along the left-right direction, and the detection conveying mechanism is located between the two material preparation conveying mechanisms; The controller is configured to, when the circuit board is conveyed to the two detection transport mechanisms and is located at the detection position, close the conveying device, and the photosensitive elements corresponding to the holes in the circuit board send signals to the controller, and the controller compares the signals of the photosensitive elements corresponding to the standard circuit board.

2. The circuit board quality inspection equipment according to claim 1, characterized in that: The base includes a display mechanism, and the controller is configured to activate the display mechanism when the detection of the photosensitive element corresponding to the circuit board is different from the photosensitive element corresponding to the standard circuit board.

3. The circuit board quality inspection equipment according to claim 2, characterized in that: The display mechanism is a display light or a speaker.

4. The circuit board quality inspection equipment according to claim 1, characterized in that: The base is provided with an ejection mechanism, the output end of which moves linearly along the front-rear direction and is connected to the two detection and transportation mechanisms. The controller is configured to activate the ejection mechanism when the detection of the circuit board by the photosensitive element is different from that of the standard circuit board.

5. The circuit board quality inspection equipment according to claim 4, characterized in that: The ejection mechanism includes an ejection drive source, a push rod and an electromagnetic lock. The ejection drive source is connected to the machine base, and the output end of the ejection drive source is connected to the push rod. The push rod is respectively connected to the electromagnetic lock and the detection and transportation mechanism located at the rear end. The end of the push rod away from the ejection drive source is passed through the detection and transportation mechanism located at the front end. After the electromagnetic lock is energized, it is magnetically connected to the detection and transportation mechanism located at the front end.

6. The circuit board quality inspection equipment according to claim 5, characterized in that: The detection and transportation mechanism located at the front end is provided with a magnetic piece corresponding to the electromagnetic lock.

7. The circuit board quality inspection equipment according to claim 4, characterized in that: The ejection mechanism is provided with a limiting mechanism in cooperation, and the limiting mechanism includes an extension limiting member and a retraction limiting member. The controller is configured to close the ejection mechanism when the detection and transportation mechanism is respectively connected with the extension limiting member and the retraction limiting member.

8. The circuit board quality inspection equipment according to claim 1, characterized in that: The base is connected to a positioning drive source, the output end of which moves linearly in the up-down direction and is connected to a positioning member, and the positioning member is located between the detection and transportation mechanism and the material preparation and transportation mechanism for outputting circuit boards.

9. The circuit board quality inspection equipment according to claim 1, characterized in that: The workbench is provided with a slide groove extending forward and backward, and the conveying device located at the front end is slidably connected to the slide groove.

10. The circuit board quality inspection equipment according to claim 9, characterized in that: The machine base is provided with a locking piece, and the opposite ends of the locking piece are respectively connected to the workbench and the conveying device located at the front end.

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