Adsorption control assembly, vacuum adsorption platform and PCB detection equipment

Abstract

The utility model relates to the technical field of vacuum adsorption, in particular to an adsorption control assembly, a vacuum adsorption platform and PCB (printed circuit board) detection equipment. The adsorption control assembly comprises a vacuum box and a plurality of control units, each control unit comprises a driving part, a moving part and an adjusting part, the vacuum box is used for being connected with vacuum equipment, a valve cavity is formed in the adjusting part, the adjusting part is provided with a first opening and a second opening, the first opening is connected between an inner cavity of the vacuum box and the valve cavity, and the second opening is connected between the inner cavity of the vacuum box and the valve cavity. The second opening is communicated with an adsorption cavity of the vacuum adsorption platform; the movable part is arranged in the valve cavity, the driving part is used for driving the movable part to reciprocate in the valve cavity in the first direction so as to adjust the communication area of the second opening and the valve cavity, the communication area of the second opening and the valve cavity can be adjusted by moving the movable part in the valve cavity, and therefore the suction force of the vacuum equipment to the adsorption cavity is adjusted.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum adsorption, and particularly relates to an adsorption control assembly, a vacuum adsorption platform and a PCB detection device. Background Art

[0002] At present, in the process of on-line optical inspection of PCB, it is necessary to adsorb the PCB through a vacuum platform to position the PCB.

[0003] When the existing vacuum platform adsorbs the PCB, after reaching the set suction force, the vacuum generator continuously operates to maintain the suction force of the vacuum platform on the PCB. However, at the same suction force, when adsorbing PCBs of different sizes, there may be situations of over-adsorption or insufficient adsorption force of the PCB, thus affecting the stability of the PCB on the vacuum platform and being unfavorable for the on-line optical inspection of the PCB. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: aiming at the problem that when the existing vacuum platform reaches the set suction force and adsorbs PCBs of different sizes, there may be over-adsorption or insufficient adsorption force of the PCB, an adsorption control assembly, a vacuum adsorption platform and a PCB detection device are provided.

[0005] To solve the above technical problem, on the one hand, an embodiment of the utility model provides an adsorption control assembly, which includes a vacuum box body and a plurality of control units. The control unit includes a driving member, a moving member and an adjusting member. The vacuum box body is used to connect a vacuum device. A valve cavity is arranged inside the adjusting member. The adjusting member is provided with a first opening and a second opening. The first opening is connected between the inner cavity of the vacuum box body and the valve cavity. The second opening is used to communicate with the adsorption cavity of the vacuum adsorption platform.

[0006] The moving member is arranged in the valve cavity. The driving member is used to drive the moving member to reciprocate in the valve cavity along a first direction to adjust the communication area between the second opening and the valve cavity.

[0007] Optionally, a first pipe joint is arranged outside the adjusting member. The first pipe joint is communicated with the second opening. The second opening is communicated with the adsorption cavity of the vacuum adsorption platform through the first pipe joint.

[0008] Optionally, a through hole is arranged on the adjusting member. The valve cavity is communicated with the outside through the through hole. The through hole is located on the side of the adjusting member away from the first opening in the first direction. The moving member has an adjusting position and a pressure relief position.

[0009] At the adjustment position, the first opening communicates between the inner cavity of the vacuum chamber and the valve chamber, the second opening communicates with the first opening through the valve chamber, and the second opening and the through hole are blocked by the movable member; at the pressure relief position, the second opening communicates with the through hole through the valve chamber, and the first opening and the second opening are blocked by the movable member.

[0010] Optionally, the vacuum chamber and the adjusting member are in contact along the first direction, and a through hole is provided on a side wall of the vacuum chamber where it is in contact with the adjusting member, and the through hole communicates between the inner cavity of the vacuum chamber and the first opening.

[0011] Optionally, the adjusting member includes a first connecting member and a second connecting member, the second connecting member is connected between the driving member and the first connecting member, and the first opening is provided at one end of the first connecting member away from the second connecting member;

[0012] The through hole is provided on the second connecting member, a first cavity is provided in the first connecting member, a second cavity is provided in the first connecting member, and the first cavity and the second cavity are combined to form the valve chamber.

[0013] Optionally, the first connecting member includes a first flange and a first cylinder body, the first flange is connected to an axial end of the first cylinder body close to the second cylinder body and protrudes radially outward along the first cylinder body, the second connecting member includes a second flange and a second cylinder body, the second flange is connected to an axial end of the second cylinder body close to the first cylinder body and protrudes radially outward along the second cylinder body, and the first flange and the second flange are connected.

[0014] Optionally, the second connecting member further includes a retaining ring, the retaining ring is connected to an axial end of the second cylinder body close to the first cylinder body and protrudes radially inward along the second cylinder body;

[0015] A plurality of the through holes are provided, and the plurality of through holes are arranged at intervals in the circumferential direction around the first cylinder body.

[0016] Optionally, the driving member is a cylinder, the cylinder includes a cylinder body and a piston assembly connected movably, and an outer end of the piston assembly is connected to the movable member;

[0017] The control unit further includes a first sensor, a second sensor and a sensing member;

[0018] The first sensor and the second sensor are provided on the cylinder body, the sensing member is relatively stationary with the piston assembly, and the sensing member can move between the first sensor and the second sensor along the first direction;

[0019] The adjusting member is provided with a through hole, and the valve cavity communicates with the outside through the through hole. The through hole is located on the side of the adjusting member away from the first opening in the first direction. The movable member has an adjusting position and a pressure relief position. In the adjusting position, the first opening communicates between the inner cavity of the vacuum box body and the valve cavity, the second opening communicates with the first opening through the valve cavity, and the second opening and the through hole are blocked by the movable member. In the pressure relief position, the second opening communicates with the through hole through the valve cavity, and the first opening and the second opening are blocked by the movable member.

[0020] When the sensing member triggers the first sensor, the movable member is in the pressure relief position. When the sensing member triggers the second sensor, the movable member is in the adjusting position.

[0021] Optionally, a second pipe joint is provided outside the vacuum box body, and the inner cavity of the vacuum box body is connected to the vacuum device through the second pipe joint.

[0022] On the other hand, an embodiment of the present invention provides a vacuum adsorption platform, which includes a plurality of adsorption cavities and the adsorption control assembly as described above. The plurality of adsorption cavities are arranged in one-to-one correspondence with the plurality of control units.

[0023] The adsorption cavity has a first adsorption hole for adsorbing a material plate placed on the vacuum adsorption platform.

[0024] Optionally, the vacuum adsorption platform further includes a fixed seat, a conveyor belt, and a pressure detector. The conveyor belt is wound around the fixed seat, and a plurality of the adsorption cavities are arranged in the fixed seat, and the first adsorption holes are exposed from the fixed seat.

[0025] The conveyor belt is provided with second adsorption holes, and the second adsorption holes communicate with the adsorption cavities through the first adsorption holes. The conveyor belt can drive the material plate to move.

[0026] The pressure detector is provided with a plurality of first joints, and the fixed seat is provided with a plurality of second joints. Each second joint communicates with the corresponding adsorption cavity, and the plurality of first joints and the plurality of second joints are connected in one-to-one correspondence so that the pressure detector can detect the air pressure in the adsorption cavity.

[0027] On yet another aspect, an embodiment of the present invention provides a PCB detection device, which includes a machine table, a detection mechanism, and the vacuum adsorption platform as described above. The detection mechanism and the vacuum adsorption platform are arranged on the machine table, and the detection mechanism is used to detect the material plate.

[0028] The embodiment of the utility model provides an adsorption control assembly. The adsorption cavity of the vacuum adsorption platform is communicated with the inner cavity of the vacuum box body through a second opening, a valve cavity and a first opening in sequence. By moving a movable part in the valve cavity, the communication area between the second opening and the valve cavity can be adjusted, so that the suction force of the adsorption cavity of the vacuum adsorption platform can be adjusted, and the energy consumption of the vacuum device can be reduced. A plurality of control units can all be communicated with an adsorption cavity through the second opening. By adjusting the communication area between the second opening and the valve cavity in each control unit, the adsorption area or the adsorption force of the adsorption cavity of the vacuum adsorption platform can be adjusted, so that when adsorbing workpieces of different sizes, the pressure of the adsorption cavity can be adaptively adjusted, thereby controlling the adsorption force, having better adsorption stability, avoiding the situation of insufficient suction force or over-adsorption, and being beneficial to prolonging the service life of the vacuum generator. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic diagram of an adsorption control assembly provided by an embodiment of the present utility model;

[0031] Figure 2 It is a schematic diagram of a control unit provided by an embodiment of the present utility model;

[0032] Figure 3 It is a cross-sectional schematic diagram of a control unit provided by an embodiment of the present utility model;

[0033] Figure 4 It is a schematic diagram of a barometric pressure detector provided by an embodiment of the present utility model;

[0034] Figure 5 It is an assembly drawing of a vacuum adsorption platform and an adsorption control group provided by an embodiment of the present utility model.

[0035] The reference numerals in the specification are as follows:

[0036] 100, adsorption control assembly;

[0037] 11. Vacuum chamber; 111. Through hole; 12. Control unit; 121. Driving part; 1211. Cylinder block; 1212. Piston assembly; 122. Movable part; 123. Adjusting part; 1231. First connecting part; 12311. First flange; 12312. First cylinder; 12313. First chamber; 1232. Second connecting part; 12321. Second flange; 12322. Second cylinder; 12323. Retaining ring; 12324. Second chamber; 1233. Through hole; 1234. First opening; 1235. Second opening; 124. First sensor; 125. Second sensor; 13. First pipe joint; 14. Second pipe joint;

[0038] 200. Vacuum adsorption platform;

[0039] 21. Air pressure detector; 211. First joint; 22. Fixed seat; 221. Second joint; 23. Conveyor belt. Detailed implementation mode

[0040] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0041] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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, and thus cannot be understood as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0042] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0043] Such as Figures 1 to 5As shown in the figure, on the one hand, an adsorption control assembly 100 is provided in an embodiment of the present utility model, which includes a vacuum box body 11 and a plurality of control units 12. The control unit 12 includes a driving member 121, a movable member 122, and an adjusting member 123. The vacuum box body 11 is used to connect to a vacuum device so that a negative pressure can be formed inside the vacuum box body 11. A valve cavity is provided inside the adjusting member 123. The adjusting member 123 is provided with a first opening 1234 and a second opening 1235. The first opening 1234 is connected between the inner cavity of the vacuum box body 11 and the valve cavity. The second opening 1235 is used to communicate with the adsorption cavity of the vacuum adsorption platform 200. The adsorption cavity of the vacuum adsorption platform 200 is communicated with the inner cavity of the vacuum box body 11 through the second opening 1235, the valve cavity, and the first opening 1234. So that under the action of the vacuum device, a negative pressure can be formed in the adsorption cavity of the vacuum adsorption platform 200, thereby adsorbing the material plate on the vacuum adsorption platform 200.

[0044] The movable member 122 is arranged in the valve cavity. The driving member 121 is used to drive the movable member 122 to reciprocate in the valve cavity along a first direction to adjust the communication area between the second opening 1235 and the valve cavity. By moving the movable member 122, the second opening 1235 can be opened or closed. When the second opening 1235 is in the open state, the movable member 122 moves in the first direction, and the suction force of the adsorption cavity of the vacuum adsorption platform 200 can be adjusted to accurately control the adsorption force, which not only ensures the stability of the material plate on the vacuum adsorption platform 200, but also avoids unnecessary high adsorption force states, thereby reducing the energy consumption of the vacuum device and achieving the purpose of energy saving.

[0045] In this embodiment, the valve cavities of the plurality of control units 12 are communicated with the adsorption cavity of the vacuum adsorption platform 200. By adjusting the communication area between the second opening 1235 and the valve cavity in each control unit 12, the adsorption area or the adsorption force of the adsorption cavity of the vacuum adsorption platform 200 can be adjusted, so that the adsorption cavity of the vacuum adsorption platform 200 can adapt to the adsorption of material plates of various different sizes, achieving the purpose of adaptive adjustment, having good adsorption stability, and avoiding the situation of insufficient suction force or excessive adsorption.

[0046] Wherein, the second opening 1235 is located on the side wall of the valve cavity. As the movable member 122 moves in the valve cavity, the movable member 122 can block the second opening 1235 to different degrees. The communication area between the second opening 1235 and the valve cavity is determined by the unblocked part of the second opening 1235 by the movable member 122.

[0047] When the second opening 1235 is not blocked by the movable member 122 at all, the communication area between the second opening 1235 and the valve cavity is the largest. At this time, the suction force of the suction cavity of the vacuum adsorption platform 200 is the largest. As the movable member 122 moves, the second opening 1235 can be gradually blocked by the movable member 122, thereby gradually reducing the communication area between the second opening 1235 and the valve cavity, that is, reducing the communication area between the suction cavity and the inner cavity of the vacuum box 11, so as to adjust the negative pressure of the suction cavity. When the second opening 1235 is completely blocked by the movable member 122, the second opening 1235 cannot communicate with the valve cavity, and the communication area between the second opening 1235 and the valve cavity is zero. At this time, the vacuum device cannot pump air into the suction cavity of the vacuum adsorption platform 200.

[0048] In one embodiment, as Figure 3 shown, the dimension of the movable member 122 in the first direction is greater than or equal to the dimension of the second opening 1235 in the first direction, so that the second opening 1235 can be opened or closed by the movable member 122.

[0049] The movable member 122 is made of a material with certain elasticity, such as rubber. In this way, when the movable member 122 moves in the valve cavity, air flow cannot pass through the gap between the outer surface of the movable member 122 and the inner wall surface of the valve cavity.

[0050] In one embodiment, as Figure 1 、 Figure 3 shown, a first pipe joint 13 is arranged outside the adjusting member 123. The first pipe joint 13 communicates with the second opening 1235, and the second opening 1235 communicates with the suction cavity of the vacuum adsorption platform 200 through the first pipe joint 13. The first pipe joint 13 is connected between the suction cavity of the vacuum adsorption platform 200 and the second opening 1235. When the vacuum device works, air can be successively extracted from the suction cavity of the vacuum adsorption platform 200 through the inner cavity of the vacuum box 11, the valve cavity and the first pipe joint 13, so as to form a negative pressure environment in the suction cavity.

[0051] Wherein, the first pipe joint 13 extends in the second direction, the second direction is perpendicular to the first direction, and the second opening 1235 communicates with the second pipe joint 14 and the valve cavity to realize the communication between the valve cavity and the suction cavity of the vacuum adsorption platform 200.

[0052] In one embodiment, as Figure 2 、 Figure 3As shown, a through hole 1233 is provided on the adjusting member 123. The valve cavity communicates with the outside through the through hole 1233. The through hole 1233 is located on the side of the adjusting member 123 away from the first opening 1234 in the first direction. The movable member 122 has an adjusting position and a pressure relief position. In the adjusting position, the first opening 1234 communicates between the inner cavity of the vacuum box 11 and the valve cavity. The second opening 1235 communicates with the first opening 1234 through the valve cavity. The second opening 1235 and the through hole 1233 are blocked by the movable member 122. At this time, the second opening 1235 cannot communicate with the outside. Under the action of the vacuum device, a vacuum path is formed in sequence through the inner cavity of the vacuum box 11, the first opening 1234, the valve cavity and the second opening 1235. Through this vacuum path, the negative pressure of the adsorption cavity of the vacuum adsorption platform 200 can be adjusted.

[0053] In the pressure relief position, the second opening 1235 communicates with the through hole 1233 through the valve cavity. The first opening 1234 and the second opening 1235 are blocked by the movable member 122. At this time, the vacuum path is blocked by the movable member 122, and the inner cavity of the vacuum box 11 and the valve cavity cannot communicate. The vacuum device cannot evacuate the adsorption cavity of the vacuum adsorption platform 200. At the same time, the second opening 1235 communicates with the through hole 1233 through the valve cavity, so that the adsorption cavity of the vacuum adsorption platform 200 communicates with the outside through the second opening 1235, the valve cavity and the through hole 1233 in sequence, so that the adsorption cavity of the vacuum adsorption platform 200 can be quickly depressurized, and the pressure inside the adsorption cavity can be quickly released to the outside.

[0054] In this embodiment, by switching the movable member 122 between the adjusting position and the pressure relief position, the flow path of the gas can be controlled, so that the adsorption function can be turned on or off in different working states, and the communication area between the second opening 1235 and the valve cavity can be accurately adjusted, thereby adjusting the negative pressure of the adsorption cavity.

[0055] In one embodiment, in the pressure relief position, the movable member 122 moves to one end of the adjusting member close to the vacuum box 11, and the movable member 122 blocks the first opening 1234, so that the inner cavity of the vacuum box 11 and the valve cavity cannot communicate. When the movable member 122 moves in the first direction away from the vacuum box 11 under the drive of the driving member 121, the movable member 122 leaves the pressure relief position and moves towards the adjusting position. When the side of the movable member 122 close to the vacuum box 11 passes over the upper edge of the second opening 1235 in the first direction as Figure 5 shown, the second opening 1235 begins to be exposed, and the first opening 1234 can communicate with the second opening 1235 through the valve cavity until the second opening 1235 is completely exposed and not blocked by the movable member 122, and the communication area between the second opening 1235 and the valve cavity reaches the maximum.

[0056] It should be noted that within the valve cavity, the section from the position where the second opening 1235 just starts to be exposed to the position where the second opening 1235 is completely exposed all belongs to the adjustment position.

[0057] In one embodiment, the vacuum box body 11 is connected to the adjusting member 123 in the first direction. A through hole 111 is provided on a side wall of the vacuum box body 11 where it is connected to the adjusting member 123. The through hole 111 penetrates the side wall of the vacuum box body 11 and is communicated between the inner cavity of the vacuum box body 11 and the first opening 1234, so as to be able to communicate the inner cavity of the vacuum box body 11 with the valve cavity, enabling the vacuum device to quickly and efficiently evacuate the valve cavity through the inner cavity of the vacuum box body 11.

[0058] In one embodiment, as Figure 2 、 Figure 3 shown, the adjusting member 123 includes a first connecting member 1231 and a second connecting member 1232. The second connecting member 1232 is connected between the driving member 121 and the first connecting member 1231. A first opening 1234 is provided at one end of the first connecting member 1231 away from the second connecting member 1232. A through hole 1233 is provided on the second connecting member 1232. A first cavity 12313 is provided in the first connecting member 1231, and a second cavity 12324 is provided in the second connecting member 1232. The first cavity 12313 and the second cavity 12324 are combined to form a valve cavity. The movable member 122 moves in the first cavity 12313 of the first connecting member 1231. When the movable member 122 is in the pressure relief position, the second opening 1235 is communicated with the outside through the first cavity 12313, the second cavity 12324 and the through hole 1233, realizing the pressure relief of the adsorption cavity of the vacuum adsorption platform 200. When the movable member 122 is in the adjustment position, the second opening 1235 and the through hole 1233 are blocked by the movable member 122, and the second opening 1235 is communicated through the first cavity 12313 and the first opening 1234, realizing the adjustment of the negative pressure of the adsorption cavity.

[0059] In one embodiment, as Figure 3 shown, the first connecting member 1231 includes a first flange 12311 and a first cylinder 12312. The first flange 12311 is connected to an axial end of the first cylinder 12312 close to the second cylinder 12322 and protrudes radially outward along the first cylinder 12312. The second connecting member 1232 includes a second flange 12321 and a second cylinder 12322. The second flange 12321 is connected to an axial end of the second cylinder 12322 close to the first cylinder 12312 and protrudes radially outward along the second cylinder 12322. The first flange 12311 and the second flange 12321 are connected, thus realizing a stable connection structure between the first connecting member 1231 and the second connecting member 1232.

[0060] Among them, the first opening 1234 is arranged at one end of the first cylinder 12312 close to the vacuum chamber 11, and the second opening 1235 is arranged on the circumferential side wall of the first cylinder 12312. The through hole 1233 is arranged on the circumferential side wall of the second cylinder 12322.

[0061] In one embodiment, as Figure 3 shown, the second connecting member 1232 further includes a retaining ring 12323. The retaining ring 12323 is connected to the axial end of the second cylinder 12322 close to the first cylinder 12312 and protrudes inward in the radial direction of the second cylinder 12322. The first chamber 12313 and the second chamber 12324 can be spaced apart by the retaining ring 12323, and the movable member 122 can be blocked by the retaining ring 12323, so that the movable member 122 moves in the first chamber 12313 and cannot enter the second chamber 12324.

[0062] The retaining ring 12323 is provided with an avoidance hole. The output end of the driving member 121 passes through the avoidance hole and is connected to the movable member 122 in the first chamber 12313. When the movable member 122 abuts against the retaining ring 12323, the second opening 1235 cannot be blocked by the movable member 122, and the communication area between the second opening 1235 and the valve chamber reaches the maximum. The moving stroke of the movable member 122 is between the first opening 1234 and the retaining ring 12323.

[0063] In one embodiment, as Figure 2 shown, a plurality of through holes 1233 are provided. The plurality of through holes 1233 are arranged at intervals around the circumference of the first cylinder 12312. A relatively large communication area between the valve chamber and the outside is ensured through the plurality of through holes 1233, and rapid pressure relief of the valve chamber is further ensured.

[0064] In one embodiment, as Figure 3 shown, the driving member 121 is a cylinder. The cylinder includes a cylinder body 1211 and a piston assembly 1212 that are movably connected. The outer end of the piston assembly 1212 is connected to the movable member 122. A through hole is provided at one end of the second cylinder 12322 away from the first cylinder 12312. The outer end of the piston assembly 1212 can sequentially pass through the through hole of the second connecting member 1232 and the retaining ring 12323 and then extend into the first connecting member 1231, which is convenient for connecting the piston assembly 1212 and the movable member 122, so that the movable member 122 moves in the first chamber 12313 under the drive of the piston assembly 1212.

[0065] Among them, the control unit 12 further includes a first sensor 124, a second sensor 125 and a sensing member. The first sensor 124 and the second sensor 125 are arranged on the cylinder block 1211. The first sensor 124 and the second sensor 125 are arranged at intervals in the first direction. The first sensor 124 is closer to the vacuum box 11 than the second sensor 125. The sensing member is relatively stationary with the piston assembly 1212. The sensing member is installed on the piston assembly 1212 and can move with the piston assembly 1212. The sensing member can move between the first sensor 124 and the second sensor 125 in the first direction.

[0066] A through hole 1233 is provided on the adjusting member 123. The valve cavity communicates with the outside through the through hole 1233. The through hole 1233 is located on the side of the adjusting member 123 away from the first opening 1234 in the first direction. The movable member 122 has an adjusting position and a pressure relief position. In the adjusting position, the first opening 1234 communicates between the inner cavity of the vacuum box 11 and the valve cavity. The second opening 1235 communicates with the first opening 1234 through the valve cavity. The second opening 1235 and the through hole 1233 are blocked by the movable member 122. By adjusting the communication area between the second opening 1235 and the valve cavity, the negative pressure of the adsorption cavity of the vacuum adsorption platform 200 can be adjusted. In the pressure relief position, the second opening 1235 communicates with the through hole 1233 through the valve cavity. The first opening 1234 and the second opening 1235 are blocked by the movable member 122. The second opening 1235 can communicate with the outside through the valve cavity and the through hole 1233, realizing the rapid pressure relief of the adsorption cavity of the vacuum adsorption platform 200.

[0067] When the sensing member triggers the first sensor 124, the movable member 122 is in the pressure relief position; when the sensing member triggers the second sensor 125, the movable member 122 is in the adjusting position. Among them, when the communication area between the second opening 1235 and the valve cavity is the largest, the second sensor 125 is triggered by the sensing member. The moving range of the sensing member can be limited by the first sensor 124 and the second sensor 125.

[0068] Preferably, the first sensor 124 and the second sensor 125 are magnetic sensors, and the sensing member is a magnetic ring.

[0069] In one embodiment, as Figure 1 shown, a second pipe joint 14 is provided outside the vacuum box 11. The inner cavity of the vacuum box 11 is connected to the vacuum device through the second pipe joint 14. The second pipe joint 14 is connected between the inner cavity of the vacuum box 11 and the vacuum device. When the vacuum device works, air can be pumped out from the inner cavity of the vacuum box 11 through the second pipe joint 14, so as to form a negative pressure environment in the inner cavity of the vacuum box 11.

[0070] On the other hand, as Figure 4 、 Figure 5As shown in the figure, an embodiment of the present utility model provides a vacuum adsorption platform 200, which includes a plurality of adsorption chambers and the adsorption control assembly 100 of the above embodiment. The plurality of adsorption chambers are arranged in one-to-one correspondence with a plurality of control units 12. The adsorption chamber has a first adsorption hole for adsorbing a material plate placed on the vacuum adsorption platform 200. By adjusting the communication area between the second opening 1235 and the valve chamber in each control unit 12, the negative pressure of the adsorption chamber corresponding to the control unit 12 can be adjusted, and the purpose of controlling the adsorption area on the fixed seat 22 in different sizes can be achieved.

[0071] Specifically, according to the size of the PCB, determine the number of adsorption chambers to be opened, and adjust the pressure of the opened adsorption chambers through the movable member 122. When the material plate does not need to be adsorbed, the movable member 122 moves to the pressure relief position, so that the adsorption chamber can quickly relieve pressure.

[0072] In one embodiment, as Figure 5 shown, the vacuum adsorption platform 200 further includes a fixed seat 22, a conveyor belt 23 and a gas pressure detector 21. The conveyor belt 23 is wound around the fixed seat 22. A plurality of adsorption chambers are arranged in the fixed seat 22, and the first adsorption holes are exposed from the fixed seat 22. The conveyor belt 23 is provided with second adsorption holes, and the second adsorption holes are communicated with the adsorption chambers through the first adsorption holes. The conveyor belt 23 can drive the material plate to move. The adsorption chambers are communicated through the first adsorption holes and the second adsorption holes, so that the material plate on the conveyor belt 23 can be adsorbed.

[0073] The gas pressure detector 21 is provided with a plurality of first connectors 211, and the fixed seat 22 is provided with a plurality of second connectors 221. Each second connector 221 is communicated with a corresponding adsorption chamber. The plurality of first connectors 211 and the plurality of second connectors 221 are connected in one-to-one correspondence, so that the gas pressure detector 21 can detect the air pressure in the adsorption chamber. Through the gas pressure detector 21, the pressure in the adsorption chamber can be monitored, and according to the detection result of the gas pressure detector 21, the stroke of the driving member 121 driving the movable member 122 to move can be controlled, so as to achieve the purpose of accurately adjusting the pressure in the adsorption chamber.

[0074] On the other hand, an embodiment of the present utility model provides a PCB detection device, which includes a machine table, a detection mechanism and the vacuum adsorption platform 200 of the above embodiment. The detection mechanism and the vacuum adsorption platform 200 are arranged on the machine table, and the detection mechanism is used for optically detecting the material plate.

[0075] The above-described 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. An adsorption control component, characterized in that, It includes a vacuum chamber and multiple control units. The control unit includes a driving member, a movable member, and an adjusting member. The vacuum chamber is used to connect to a vacuum device. A valve chamber is provided inside the adjusting member. The adjusting member is provided with a first opening and a second opening. The first opening is connected between the inner cavity of the vacuum chamber and the valve chamber. The second opening is used to communicate with the adsorption chamber of the vacuum adsorption platform. The movable member is arranged in the valve chamber. The driving member is used to drive the movable member to reciprocate in the valve chamber along a first direction to adjust the communication area between the second opening and the valve chamber.

2. The adsorption control component according to claim 1, wherein A first pipe joint is provided outside the adjusting member. The first pipe joint is communicated with the second opening. The second opening is communicated with the adsorption chamber of the vacuum adsorption platform through the first pipe joint.

3. The adsorption control component according to claim 1, wherein A through hole is provided on the adjusting member. The valve chamber is communicated with the outside through the through hole. The through hole is located on the side of the adjusting member away from the first opening in the first direction. The movable member has an adjusting position and a pressure relief position. In the adjusting position, the first opening is communicated between the inner cavity of the vacuum chamber and the valve chamber. The second opening is communicated with the first opening through the valve chamber. The second opening and the through hole are blocked by the movable member. In the pressure relief position, the second opening is communicated with the through hole through the valve chamber. The first opening and the second opening are blocked by the movable member.

4. The adsorption control component according to claim 3, wherein The vacuum chamber and the adjusting member are connected along the first direction. A through hole is provided on the side wall of the vacuum chamber and the adjusting member where they are connected. The through hole is communicated between the inner cavity of the vacuum chamber and the first opening.

5. The adsorption control component according to claim 3, characterized in that, The adjusting member includes a first connecting member and a second connecting member. The second connecting member is connected between the driving member and the first connecting member. The first opening is provided at one end of the first connecting member away from the second connecting member. The through hole is provided on the second connecting member. A first cavity is provided inside the first connecting member. The first opening is communicated between the first cavity and the inner cavity of the vacuum chamber. A second cavity is provided inside the second connecting member. The first cavity and the second cavity together form the valve chamber.

6. The adsorption control component according to claim 5, wherein The first connecting member includes a first flange and a first cylinder body. The second connecting member includes a second flange and a second cylinder body. The first flange is connected to the axial end of the first cylinder body close to the second cylinder body and protrudes radially outward along the first cylinder body. The second flange is connected to the axial end of the second cylinder body close to the first cylinder body and protrudes radially outward along the second cylinder body. The first flange and the second flange are connected.

7. The adsorption control assembly according to claim 6, wherein The second connecting member further includes a retaining ring. The retaining ring is connected to the axial end of the second cylinder body close to the first cylinder body and protrudes radially inward along the second cylinder body. Multiple through holes are provided. The multiple through holes are arranged at intervals around the circumference of the first cylinder body.

8. The adsorption control component according to claim 1, wherein The driving member is a cylinder. The cylinder includes a cylinder body and a piston assembly connected movably. The outer end of the piston assembly is connected to the movable member. The control unit further includes a first sensor, a second sensor, and an induction member. The first sensor and the second sensor are arranged on the cylinder block, the sensing member is relatively stationary with respect to the piston assembly, and the sensing member can move between the first sensor and the second sensor along the first direction; A through hole is provided on the adjusting member, and the valve cavity communicates with the outside through the through hole. The through hole is located on the side of the adjusting member away from the first opening in the first direction. The movable member has an adjusting position and a pressure relief position; in the adjusting position, the first opening communicates between the inner cavity of the vacuum box body and the valve cavity, the second opening communicates with the first opening through the valve cavity, and the second opening and the through hole are blocked by the movable member; In the pressure relief position, the second opening communicates with the through hole through the valve cavity, and the first opening and the second opening are blocked by the movable member; When the sensing member triggers the first sensor, the movable member is in the pressure relief position; when the sensing member triggers the second sensor, the movable member is in the adjusting position.

9. The adsorption control assembly according to any one of claims 1-8, characterized in that, A second pipe joint is provided outside the vacuum box body, and the inner cavity of the vacuum box body is connected to the vacuum device through the second pipe joint.

10. A vacuum adsorption platform, characterized in that, It includes a plurality of adsorption chambers and the adsorption control assembly according to any one of claims 1-9, and the plurality of adsorption chambers are arranged in one-to-one correspondence with the plurality of control units; The adsorption chamber has a first adsorption hole for adsorbing the material plate placed on the vacuum adsorption platform.

11. The vacuum adsorption platform according to claim 10, characterized in that, The vacuum adsorption platform further includes a fixed seat, a conveyor belt and a gas pressure detector. The conveyor belt is wound around the fixed seat, and a plurality of the adsorption chambers are arranged in the fixed seat, and the first adsorption holes are exposed from the fixed seat; Second adsorption holes are provided on the conveyor belt, and the second adsorption holes communicate with the adsorption chambers through the first adsorption holes, and the conveyor belt can drive the material plate to move; A plurality of first joints are provided on the gas pressure detector, and a plurality of second joints are provided on the fixed seat. Each second joint communicates with the corresponding adsorption chamber, and the plurality of first joints and the plurality of second joints are connected in one-to-one correspondence so that the gas pressure detector can detect the gas pressure in the adsorption chamber.

12. A PCB detection device, characterized in that, It includes a machine table, a detection mechanism and the vacuum adsorption platform according to any one of claims 10-11. The detection mechanism and the vacuum adsorption platform are arranged on the machine table, and the detection mechanism is used to detect the material plate.

Images