PCB thickness detection device

Abstract

The invention relates to the technical field of PCB thickness detection, in particular to a PCB thickness detection device which comprises two sets of conveying toothed belts arranged in an objective table, hollow pipes are fixedly installed on the upper surfaces of the two sets of conveying toothed belts, and the upper ends of the hollow pipes are fixedly connected with the lower surface of a supporting plate. The inner walls of the two sets of conveying toothed belts are connected with multiple sets of matching teeth in a meshed mode, positioning rods are fixedly installed at the lower ends of the multiple sets of matching teeth correspondingly, and the lower ends of the positioning rods are rotationally connected with the bottom face of a cavity formed in the objective table. Driven teeth connected to the surface of the positioning rod in a sleeving mode are arranged below the right end of the belt wheel set, driving teeth are connected to one sides of the driven teeth in an engaged mode, and a driving source is fixedly connected to the lower ends of the driving teeth. According to the invention, through cooperative use of all parts, the PCB can be automatically shifted and kept stable in the detection process, and the accuracy of a detection result is ensured while the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of PCB thickness detection, and in particular to a PCB thickness detection device. Background Art

[0002] In the manufacturing process of printed circuit boards (PCBs), accurate thickness detection is a key link to ensure product quality and performance. The thickness uniformity of PCBs directly affects their mechanical strength, heat dissipation performance and compatibility with electronic components. Therefore, their thickness needs to be detected before they are put into use. During the detection, a measurement module consisting of a laser transmitter, a CCD sensor and a data processing system is usually used to detect the PCB board.

[0003] However, when using a measuring module composed of a laser emitter, a CCD sensor and a data processing system for detection, the laser emitter cannot be moved, so the PCB board to be detected can only be detected at a fixed position, and the detection position cannot be automatically adjusted during the detection process, affecting the detection efficiency. Summary of the invention

[0004] The object of the present invention is to provide a PCB thickness detection device to solve the problem in the prior art proposed in the above background technology that the PCB board cannot automatically adjust the detection position during the detection process.

[0005] To achieve the above object, the present invention provides the following technical solutions: a PCB board thickness detection device, comprising a detection body, two groups of detection heads distributed up and down are symmetrically installed on the surface of the detection body, a stage is provided between the two groups of detection heads, and the stage is fixedly installed on the surface of the detection body, and further comprising: the detection head is electrically connected to an image acquisition module, a cavity is provided inside the stage, and two groups of symmetrically arranged support plates are provided on the upper surface of the stage, and the support plates are hollow structures;

[0006] It also includes two groups of shifting components for changing the detection position of the PCB board, the two groups of shifting components include two groups of conveyor belts arranged inside the loading platform, the upper surfaces of the two groups of conveyor belts are fixedly installed with hollow tubes, and the upper ends of the hollow tubes are fixedly connected to the lower surface of the support plate, the inner walls of the two groups of conveyor belts are meshingly connected with multiple groups of matching teeth, the lower ends of the multiple groups of matching teeth are fixedly installed with positioning rods, and the lower ends of the positioning rods are rotatably connected to the bottom surface of the cavity opened inside the loading platform, wherein the surface of the positioning rod on the left side is sleeved with a pulley group, and the other end of the pulley group is sleeved on the surface of a group of positioning rods on the right side, and a driven tooth sleeved on the surface of the positioning rod is provided below the right end of the pulley group, one side of the driven tooth is meshingly connected with a driving tooth, and the lower end of the driving tooth is fixedly connected with a driving source.

[0007] Furthermore, two groups of annular grooves are formed through the surface of the stage, and detection holes are formed between the two groups of annular grooves, and the positions of the detection holes correspond to the two groups of detection heads.

[0008] Furthermore, the upper surface of the support plate is provided with a plurality of groups of circular holes, and the circular holes are connected with the interior of the support plate, the lower surface of the circular holes are movably connected with two groups of symmetrically arranged guide balls, and the surfaces of the guide balls are in contact with the surface of the stage, the upper surface of the support plate is adhered with a flexible pad, and the surface of the flexible pad is provided with through holes corresponding to the circular holes one by one.

[0009] Furthermore, the conveyor toothed belt is arranged directly below the annular groove, and the conveyor toothed belt is adapted to the shape of the annular groove.

[0010] Furthermore, a vertical groove is provided inside the conveyor toothed belt, and a guide groove communicating with the outside is provided on the inner wall of the vertical groove.

[0011] Furthermore, it also includes two groups of stabilizing components for fixing the PCB board, the stabilizing component includes a square ring sleeved on the surface of the conveyor belt, the surface of the square ring is provided with a recess, a matching rod is provided below the square ring, and the end of the matching rod passes through the guide groove and extends to the interior of the vertical groove, the end of the matching rod is fixedly connected to a pull rod, the upper end of the pull rod passes through the interior of the vertical groove and the hollow tube and extends to the interior of the support plate, and the end of the pull rod is fixedly connected to a strip plate.

[0012] Furthermore, the square ring is fixedly connected to the inner wall of the cavity, and the inner wall of the square ring is slidably matched with the outer surface of the conveyor toothed belt.

[0013] Furthermore, a collar is sleeved on the surface of the matching rod, and the collar is movably connected to the matching rod, and the surface of the collar fits with the lower surface of the square ring.

[0014] Furthermore, the strip plate is elastically connected to the inner bottom surface of the support plate via a connecting spring, and the surface of the strip plate is in contact with the inner wall of the support plate.

[0015] Furthermore, the image acquisition module is electrically connected to a display, and is used to receive the electrical signal fed back by the detection head, convert the electrical signal into image data, and display it on the display.

[0016] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0017] 1. The present invention provides components such as a conveyor toothed belt, a positioning rod and a driving tooth that cooperate with each other, and can drive the driving tooth to rotate through a driving source, and drive the driven tooth meshing with it to rotate synchronously, so that the pulley group starts to move and drives the positioning rods fixedly connected to the two ends of the pulley group to rotate, and then the matching teeth rotate synchronously and drive the conveyor toothed belt to start rotating, and drive the hollow tube installed at the upper end of the conveyor toothed belt to slide inside the annular groove, so that the two groups of support plates can move in the same direction, thereby driving the PCB board woven on the upper surface of the support plate to automatically change position, thereby improving the detection efficiency.

[0018] 2. The present invention can cooperate with the transposition component to fix the PCB board through the square ring, matching rod and strip plate, so that when the conveyor belt rotates, the ring will first move out from the inside of the recess and contact with the lower end of the square ring. During the downward movement of the ring, the pull rod will start to move downward through the matching rod, and then drive the strip plate inside the support plate to start moving downward, so as to adsorb the PCB board placed on the surface of the support plate, so that the PCB board remains stable during the detection process, ensuring the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the stage of the present invention;

[0022] Figure 3 It is a partial structural schematic diagram of the transposition component of the present invention;

[0023] Figure 4 for Figure 2 A schematic diagram of the structure enlargement in the middle;

[0024] Figure 5 It is a schematic diagram of the separation of the square ring and the conveyor belt structure of the present invention;

[0025] Figure 6 for Figure 5 A magnified schematic diagram of the structure at B in the middle;

[0026] Figure 7 It is a schematic diagram of the internal structure of the support plate of the present invention.

[0027] In the figure: 1. detection body; 2. detection head; 3. loading platform; 301. annular groove; 302. detection hole; 4. support plate; 401. round hole; 402. guide ball; 403. flexible pad; 5. transposition assembly; 501. conveyor belt; 5011. vertical groove; 5012. guide groove; 502. hollow tube; 503. matching tooth; 504. positioning rod; 505. pulley group; 506. driven tooth; 507. driving tooth; 6. stabilizing assembly; 601. square ring; 602. notch; 603. matching rod; 604. collar; 605. pull rod; 606. strip plate. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The present invention will be further described below in conjunction with the embodiments.

[0030] Embodiment: A PCB thickness detection device, such as Figure 1-Figure 7 As shown, it includes a detection body 1, and two groups of detection heads 2 distributed up and down are symmetrically installed on the surface of the detection body 1. The detection head 2 is electrically connected to an image acquisition module, and the image acquisition module is electrically connected to a display. The image acquisition module is used to receive the electrical signal fed back by the detection head 2, convert the electrical signal into image data and display it on the display. The detection head 2 is a prior art, which uses a laser to irradiate the surface of the PCB board and receive the feedback electrical signal, which is then transmitted to the image acquisition module, and the thickness of the PCB board is measured after the signal is converted; then the measurement result is displayed on the display; the two groups of detection heads 2 A stage 3 is provided between the two detection bodies 1, and the stage 3 is fixedly mounted on the surface of the detection body 1. By providing the stage 3, the PCB board can be carried; two groups of annular grooves 301 are provided on the surface of the stage 3, and the annular grooves 301 can play a guiding and limiting role; a detection hole 302 is provided between the two groups of annular grooves 301, and the positions of the detection holes 302 correspond to the two groups of detection heads 2. By providing the detection holes 302, the laser emitted by the detection head 2 located below the stage 3 can penetrate through the inside thereof and irradiate on the surface of the PCB board, so as to facilitate the measurement of the thickness of the PCB board;

[0031] Among them, a cavity is opened inside the stage 3, and two groups of symmetrically arranged support plates 4 are provided on the upper surface of the stage 3, and the support plates 4 are hollow structures. The support plates 4 are provided to place the PCB board to be tested; multiple groups of circular holes 401 are opened on the upper surface of the support plate 4, and the circular holes 401 are connected with the inside of the support plate 4. By opening the circular holes 401, the inside and outside of the support plate 4 are connected to facilitate the flow of air; two groups of symmetrically arranged guide balls 402 are movably connected to the lower surface of the circular holes 401, and the surfaces of the guide balls 402 are in contact with the surface of the stage 3. By providing the guide balls 402, the support plate 4 can be supported so that the support plate 4 can remain stable; a flexible pad 403 is attached to the upper surface of the support plate 4, and the surface of the flexible pad 403 is provided with through holes corresponding to the circular holes 401 one by one. By providing the flexible pad 403, a buffering effect can be played, and the friction between the PCB board and the surface of the support plate 4 can also be reduced.

[0032] Combined with Figure 1 -Attached Figure 7 , and also includes two groups of transposition components 5 for changing the detection position of the PCB board, so that the PCB board can be automatically transposed during the detection process, thereby accelerating the detection efficiency; the two groups of transposition components 5 include two groups of conveyor toothed belts 501 arranged inside the stage 3, the conveyor toothed belts 501 are arranged directly below the annular groove 301, and the conveyor toothed belts 501 are adapted to the shape of the annular groove 301, and by providing the conveyor toothed belts 501, the support plate 4 can be driven to move; a vertical groove 5011 is provided inside the conveyor toothed belt 501, and a guide groove 5012 connected to the outside is provided on the inner wall of the vertical groove 5011, and the vertical groove 5011 and the guide groove 5012 are provided, so as to play a guiding and limiting role;

[0033] The upper surfaces of the two groups of conveyor toothed belts 501 are fixedly installed with hollow tubes 502, and the upper ends of the hollow tubes 502 are fixedly connected to the lower surface of the support plate 4. By setting the hollow tubes 502, the conveyor toothed belts 501 can be connected so that the support plate 4 can be driven to move through the hollow tubes 502 to achieve the purpose of PCB board transposition; it is worth noting that the upper ends of the hollow tubes 502 penetrate the inside of the annular groove 301 before being fixedly connected to the lower surface of the support plate 4; the inner walls of the two groups of conveyor toothed belts 501 are meshed and connected with multiple groups of matching teeth 503, and by setting the matching teeth 503, the conveyor toothed belts 501 can be driven to rotate; it is worth noting that the multiple groups of matching teeth 503 are respectively arranged at the four corners of the conveyor toothed belts 501, which are used to ensure the shape of the conveyor toothed belts 501, and at the same time enable the conveyor toothed belts 501 to drive the positioning rods 504 to move along the prescribed path;

[0034] Among them, the lower ends of the multiple groups of matching teeth 503 are fixedly installed with positioning rods 504, and the lower ends of the positioning rods 504 are rotatably connected to the bottom surface of the cavity opened inside the loading platform 3. By setting the positioning rods 504, the positions of the matching teeth 503 can be fixed; the surface of the left positioning rod 504 is sleeved with a pulley group 505, and the other end of the pulley group 505 is sleeved on the surface of a group of positioning rods 504 on the right. By setting the pulley group 505, it can play a role in connection and kinetic energy transmission. The two groups of shifting components 5 can move synchronously; a driven tooth 506 is provided at the lower right end of the pulley group 505, which is sleeved on the surface of the positioning rod 504. By setting the driven tooth 506, the positioning rod 504 and the pulley group 505 can be driven to move synchronously; one side of the driven tooth 506 is meshedly connected with a driving tooth 507, and the lower end of the driving tooth 507 is fixedly connected with a driving source. By setting the driving tooth 507, the driven tooth 506 can be driven to rotate; it is worth noting that, in combination with the attached Figure 4 The driving teeth 507 and the driven teeth 506 are intermittently meshed to ensure that the PCB board has time to maintain a stable state each time it changes position, thereby ensuring the accuracy of the detection result.

[0035] Combined with Figure 1 -Attached Figure 7 By setting two groups of stabilizing components 6 for fixing the PCB board, the PCB board can remain stable during the detection and transposition process, thereby ensuring the accuracy of the detection result; the stabilizing component 6 includes a square ring 601 sleeved on the surface of the conveyor toothed belt 501, the square ring 601 is fixedly connected to the inner wall of the cavity, and the inner wall of the square ring 601 is slidably matched with the outer surface of the conveyor toothed belt 501, and the square ring 601 is provided to play a guiding and limiting role; the surface of the square ring 601 is provided with a notch 602, and by providing the notch 602, the purpose of lifting and lowering other components can be driven by its shape;

[0036] Wherein, a matching rod 603 is provided below the square ring 601, and the end of the matching rod 603 passes through the guide groove 5012 and extends to the inside of the vertical groove 5011, and a collar 604 is sleeved on the surface of the matching rod 603, and the collar 604 is movably connected to the matching rod 603, and the surface of the collar 604 is in contact with the lower surface of the square ring 601. By providing the matching rod 603 and the collar 604, the matching rod 603 and the collar 604 can cooperate with the square ring 601 and the notch 602, and when the conveyor toothed belt 501 rotates, it can move downward under the action of the notch 602; it is worth noting that by providing the collar 604 movably connected to the matching rod 603, the friction between the collar 604 and the square ring 601 can be reduced, so that the conveyor toothed belt 501 can rotate smoothly;

[0037] Among them, the end of the matching rod 603 is fixedly connected with a pull rod 605, and the upper end of the pull rod 605 passes through the vertical groove 5011 and the interior of the hollow tube 502 and extends to the interior of the support plate 4. By setting the pull rod 605, the pull rod 605 can be driven to move downward synchronously during the downward movement of the matching rod 603; the end of the pull rod 605 is fixedly connected with a strip plate 606, and the strip plate 606 is elastically connected to the inner bottom surface of the support plate 4 through a connecting spring, and the surface of the strip plate 606 fits with the inner wall of the support plate 4. By setting the strip plate 606, it can move synchronously with the pull rod 605, absorb the gas inside the support plate 4, so that a negative pressure state is formed inside the support plate 4, and the PCB board placed on the surface of the support plate 4 is adsorbed and fixed to ensure the detection result; it is worth mentioning that by setting the connecting spring, the strip plate 606 can be driven to automatically reset through the reaction force generated by it.

[0038] Specifically, when the thickness of the PCB is tested, the PCB is first placed on the surfaces of the two groups of support plates 4 so that the PCB covers the circular hole 401, and then the driving source is started to drive the driving tooth 507 to rotate, and the rotation of the driving tooth 507 drives the driven tooth 506 and the pulley group 505 to rotate synchronously, so that the matching tooth 503 can drive the conveyor tooth belt 501 to move;

[0039] When the conveyor toothed belt 501 moves, the pull rod 605 will synchronously drive the matching teeth 503 and the positioning rod 504 to rotate, so that the positioning rod 504 moves out from the inside of the notch 602 and moves downward, and then the downward-moving matching rod 603 will drive the strip plate 606 installed on the upper end of the pull rod 605 to move downward synchronously, so that the strip plate 606 starts to absorb the gas inside the support plate 4, so that negative pressure is generated inside the support plate 4, the PCB board is fixed, and the PCB board detection result is guaranteed;

[0040] As the driving teeth 507 continue to rotate, the conveying toothed belt 501 will be driven to rotate intermittently, thereby achieving the purpose of automatically changing positions and accelerating the detection efficiency.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A PCB thickness detection device, comprising a detection body (1), wherein two groups of detection heads (2) are symmetrically mounted on the surface of the detection body (1) and are distributed in an upper and lower manner, and a stage (3) is arranged between the two groups of detection heads (2), and the stage (3) is fixedly mounted on the surface of the detection body (1), characterized in that: Also includes: The detection head (2) is electrically connected to an image acquisition module, a cavity is provided inside the object stage (3), and two groups of symmetrically arranged support plates (4) are provided on the upper surface of the object stage (3), and the support plates (4) are hollow structures; It also includes two groups of transposition components (5) for changing the detection position of the PCB board, the two groups of transposition components (5) include two groups of conveyor toothed belts (501) arranged inside the loading platform (3), the upper surfaces of the two groups of conveyor toothed belts (501) are fixedly installed with hollow tubes (502), and the upper ends of the hollow tubes (502) are fixedly connected to the lower surface of the support plate (4), the inner walls of the two groups of conveyor toothed belts (501) are meshedly connected with multiple groups of matching teeth (503), and the lower ends of the multiple groups of matching teeth (503) are fixedly installed with positioning rods (504), The lower end of the positioning rod (504) is rotatably connected to the bottom surface of the cavity opened inside the loading platform (3), wherein the surface of the left positioning rod (504) is sleeved with a pulley group (505), and the other end of the pulley group (505) is sleeved on the surface of a group of positioning rods (504) on the right, and a driven tooth (506) sleeved on the surface of the positioning rod (504) is provided below the right end of the pulley group (505), and one side of the driven tooth (506) is meshedly connected with a driving tooth (507), and the lower end of the driving tooth (507) is fixedly connected to a driving source.

2. A PCB thickness detection device according to claim 1, characterized in that: Two groups of annular grooves (301) are provided through the surface of the object carrier (3), a detection hole (302) is provided between the two groups of annular grooves (301), and the positions of the detection holes (302) correspond to the two groups of detection heads (2).

3. A PCB thickness detection device according to claim 2, characterized in that: The upper surface of the support plate (4) is provided with a plurality of groups of circular holes (401), and the circular holes (401) are connected to the interior of the support plate (4); the lower surface of the circular holes (401) is movably connected with two groups of symmetrically arranged guide balls (402), and the surfaces of the guide balls (402) are in contact with the surface of the loading platform (3); the upper surface of the support plate (4) is attached with a flexible pad (403), and the surface of the flexible pad (403) is provided with through holes corresponding to the circular holes (401) one by one.

4. A PCB thickness detection device according to claim 2, characterized in that: The conveyor toothed belt (501) is arranged directly below the annular groove (301), and the shapes of the conveyor toothed belt (501) and the annular groove (301) are adapted to each other.

5. A PCB thickness detection device according to claim 4, characterized in that: A vertical groove (5011) is provided inside the conveyor toothed belt (501), and a guide groove (5012) communicating with the outside is provided on the inner wall of the vertical groove (5011).

6. A PCB thickness detection device according to claim 1, characterized in that: It also includes two groups of stabilizing components (6) for fixing the PCB board, the stabilizing component (6) includes a square ring (601) sleeved on the surface of the conveyor belt (501), the surface of the square ring (601) is provided with a notch (602), a matching rod (603) is provided below the square ring (601), and the end of the matching rod (603) passes through the guide groove (5012) and extends to the inside of the vertical groove (5011), the end of the matching rod (603) is fixedly connected to a pull rod (605), the upper end of the pull rod (605) passes through the inside of the vertical groove (5011) and the hollow tube (502) and extends to the inside of the support plate (4), and the end of the pull rod (605) is fixedly connected to a strip plate (606).

7. A PCB thickness detection device according to claim 6, characterized in that: The square ring (601) is fixedly connected to the inner wall of the cavity, and the inner wall of the square ring (601) is slidably matched with the outer surface of the conveyor toothed belt (501).

8. A PCB thickness detection device according to claim 6, characterized in that: The surface of the matching rod (603) is sleeved with a collar (604), and the collar (604) is movably connected to the matching rod (603), and the surface of the collar (604) is in contact with the lower surface of the square ring (601).

9. A PCB thickness detection device according to claim 6, characterized in that: The strip plate (606) is elastically connected to the inner bottom surface of the support plate (4) via a connecting spring, and the surface of the strip plate (606) is in contact with the inner wall of the support plate (4).

10. A PCB thickness detection device according to claim 1, characterized in that: The image acquisition module is electrically connected to a display, and is used to receive an electrical signal fed back by the detection head (2), convert the electrical signal into image data, and display it on the display.

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