PCB optical detection device

Abstract

The utility model discloses a kind of PCB optical detection devices, including device ontology, the upper end surface of device ontology is slidably connected with second clamping block, the side surface of device ontology is fixedly connected with dust extraction mechanism, further include first clamping block, the side surface of second clamping block is fixedly connected with driving motor, the driving shaft of driving motor is connected with transmission screw rod, one end of transmission screw rod is rotatably connected with second clamping block through bearing, another end penetrates second clamping block and is screw thread matched with first clamping block, the one end of second clamping block facing first clamping block is equipped with guide pillar, another end of guide pillar penetrates first clamping block, and with first clamping block sliding adaptation.The utility model over first clamping block and the clamping of second clamping block, PCB board also cannot be moved by negative pressure suction, PCB board cannot be dropped due to negative pressure, avoid the scrap of PCB board due to drop, reduce the scrap rate of PCB board, by control driving motor, the movement of first clamping block can be controlled, it is simple to operate, convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of PCB board processing equipment technology, and in particular to an optical inspection device for PCB boards. Background Technology

[0002] Automated Optical Inspection (AOI) devices for PCBs are automated inspection technologies based on machine vision, widely used in PCB manufacturing and assembly to identify quality issues such as short circuits, open circuits, and solder joint defects. Existing optical inspection devices lack adjustable support brackets; when encountering PCBs of varying sizes, the brackets must be replaced for the optical inspection instrument to inspect them. Application number CN202120423248.4 discloses a multi-purpose automated optical inspection device with adjustable support brackets, allowing for the inspection of PCBs of different sizes.

[0003] However, the aforementioned patent requires the operator to hold the knob continuously with one hand to adjust the bracket; otherwise, the transmission plate will rotate under the action of the spring, causing the limit rod to fall back into the limit hole. Therefore, the operator can only adjust the bracket with one hand, which is inconvenient. In addition, the PCB board is placed directly on the bracket without a fixing device. When the dust collection mechanism works above the PCB, the negative pressure used to absorb dust will also cause the PCB board to shift to a certain extent, affecting the accuracy of optical detection, and may even cause the PCB board to fall off the bracket under the action of negative pressure. Utility Model Content

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] An optical inspection device for PCB boards includes a device body, a second clamping block slidably connected to the upper end face of the device body, and a dust collection mechanism fixedly connected to the side of the device body. The device body is characterized by further including a first clamping block, a drive motor fixedly connected to the side of the second clamping block, a transmission screw connected to the drive shaft of the drive motor, one end of the transmission screw being rotatably connected to the second clamping block via a bearing, and the other end of the transmission screw passing through the second clamping block and threadedly fitted to the first clamping block. A guide post is provided at one end of the second clamping block facing the first clamping block, and the other end of the guide post passing through the first clamping block and slidably fitted to it.

[0006] Furthermore, both the first clamping block and the second clamping block have slots on their end faces, and the two slots are located at the same height.

[0007] Furthermore, the slot is provided with a rubber layer.

[0008] Furthermore, the cross-section of the slot on the first clamping block is trumpet-shaped.

[0009] Furthermore, a pressure sensor is provided at the bottom of the slot on the first clamping block.

[0010] The beneficial effects of this utility model are:

[0011] 1. By clamping the PCB board with the first clamping block and the second clamping block, the PCB board will not be moved by the negative pressure adsorption, which effectively solves the problem of the PCB board falling due to negative pressure, avoids the scrapping of the PCB board due to falling, and reduces the scrap rate of the PCB board.

[0012] 2. The movement of the first clamping block can be controlled by controlling the drive motor, which is simple, convenient and quick to operate.

[0013] 3. The guide post provides guidance and support for the movement of the first clamping block, ensuring the stability of the first clamping block during movement and preventing shaking. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of the invention.

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 for Figure 1 AA view;

[0018] Figure 3 for Figure 2 Enlarged view of part B;

[0019] In the picture

[0020] 1. Device body; 2. First clamping block; 3. Second clamping block; 4. Drive motor; 5. Transmission screw; 6. Bearing; 7. Guide post; 8. Slot; 9. Rubber layer; 10. Pressure sensor; 11. Dust suction mechanism; 12. Limiting block. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0022] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0023] refer to Figures 1-3 As shown, one embodiment of this utility model is as follows:

[0024] An optical inspection device for PCB boards includes a device body 1. The device body 1 is an existing optical inspection device for PCB boards, such as the Innolux AOI system, the specific structure of which will not be described in detail. A second clamping block 3 is slidably connected to the upper surface of the device body 1. The second clamping block 3 is connected to a first clamping block 2 adapted to it. The first clamping block 2 and the second clamping block 3 clamp the two sides of the PCB board to ensure the stability of the PCB board. After the first clamping block 2 and the second clamping block 3 clamp the PCB board, the device body 1 controls the first clamping block 2 and the second clamping block 3 to move to the inspection stage to perform optical inspection on the PCB board.

[0025] A dust collection mechanism 11 is fixedly connected to the side of the device body 1. This dust collection mechanism 11 is existing technology and can be any existing device capable of generating negative pressure, such as a vacuum cleaner. Once the PCB board is stably clamped by the first clamping block 2 and the second clamping block 3, the dust collection mechanism 11 can be activated. At this time, the negative pressure suction port of the dust collection mechanism 11 is moved above the PCB board, and the dust on the PCB board is absorbed by the negative pressure, preventing dust from affecting the test results and improving the accuracy of the test. Furthermore, the PCB board will not be moved by the negative pressure, effectively solving the problem of the PCB board falling due to negative pressure, avoiding scrapping caused by falling PCB boards, and reducing the scrap rate of PCB boards.

[0026] In this invention, a drive motor 4 is fixedly connected to the side of the second clamping block 3. The drive shaft of the drive motor 4 is connected to a transmission screw 5. One end of the transmission screw 5 is rotatably connected to the second clamping block 3 via a bearing 6, and the other end of the transmission screw 5 passes through the second clamping block 3 and is threadedly fitted to the first clamping block 2. Adjusting the distance between the first clamping block 2 and the second clamping block 3 is automatically controlled by the rotation of the drive motor 4. When the drive motor 4 rotates forward, the transmission screw 5 rotates forward, causing the first clamping block 2 to move away from the second clamping block 3. This increases the distance between the first clamping block 2 and the second clamping block 3, facilitating the placement of a larger PCB board. When the drive motor 4 rotates in the reverse direction, the transmission screw 5 rotates in the reverse direction, causing the first clamping block 2 to move closer to the second clamping block 3. This decreases the distance between the first clamping block 2 and the second clamping block 3, clamping both sides of the PCB board. The drive motor 4 can be a servo motor, a stepper motor, or the like.

[0027] In this invention, the second clamping block 3 has a guide post 7 at one end facing the first clamping block 2, and the other end of the guide post 7 passes through the first clamping block 2 and is slidably adapted to it. The guide post 7 provides guidance and support for the movement of the first clamping block 2, ensuring its stability and preventing shaking. The cross-sectional shape of the guide post 7 is preferably I-shaped, which effectively prevents the first clamping block 2 from wobbling up and down.

[0028] In this invention, a limiting block 12 is provided at one end of the guide post 7. Specifically, the limiting block 12 can be detachably installed at the end of the guide post 7 via a threaded connection. The limiting block 12 can limit the movement distance of the first clamping block 2, preventing the first clamping block 2 from moving out of the guide post 7. Furthermore, the position of the limiting block 12 on the guide post 7 is closer to the end face of the first clamping block 2 than the end of the transmission screw 5 that extends out of the first clamping block 2, thus preventing the first clamping block 2 from moving out of the transmission screw 5.

[0029] Specifically, both the first clamping block 2 and the second clamping block 3 have slots 8 on their end faces, and the two slots 8 are located at the same height. Setting the two slots 8 at the same height ensures that the PCB board is held horizontally, preventing the PCB board from tilting and affecting the optical detection effect. The depth of the slots 8 is preferably less than or equal to 0.1 cm. While ensuring that the two slots 8 can clamp the PCB board, the slots 8 will not obstruct the upper and lower end faces of the PCB board, avoiding damage to the various electrical components on the upper and lower end faces of the PCB board.

[0030] Specifically, the slot 8 is provided with a rubber layer 9. The rubber layer 9 has a high coefficient of friction, which can increase the friction between it and the PCB board, improve the stability of the PCB board clamping, and the rubber layer 9 also has a certain degree of flexibility, which can effectively avoid rigid collisions between it and the PCB board, and effectively protect the PCB board.

[0031] Specifically, the cross-section of the slot 8 on the first clamping block 2 is trumpet-shaped. When clamping the PCB board, one side of the PCB board is first engaged into the slot 8 of the second clamping block 4. Then, the drive motor 4 is started to move the first clamping block 2 closer to the second clamping block 4. During the movement of the first clamping block 2, its trumpet-shaped structure guides the other side of the PCB board to engage into the slot 8, allowing the other end of the PCB board to quickly and accurately engage into the slot 8, thus improving efficiency.

[0032] Specifically, a pressure sensor 10 is provided at the bottom of the slot 8 on the first clamping block 2. The pressure sensor 10 is used to detect the force on the PCB board during clamping in real time. When the pressure detected by the pressure sensor 10 reaches a certain threshold, the drive motor 4 is stopped to avoid excessive pressure that could damage the PCB board.

[0033] In this invention, the movement of the first clamping block 2 can be controlled by controlling the drive motor 4, which is simple, convenient and quick to operate; and through the clamping of the first clamping block 2 and the second clamping block 4, the PCB board will not be moved by negative pressure adsorption, effectively solving the problem of the PCB board falling due to negative pressure, avoiding the scrapping of the PCB board due to falling, and reducing the scrap rate of the PCB board.

[0034] The following points need to be explained:

[0035] (1) Unless otherwise defined, the same reference numerals in the embodiments and drawings of this disclosure have the same meaning.

[0036] (2) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0037] (3) For clarity, components or areas are enlarged in the drawings used to describe embodiments of the present disclosure. It will be understood that when an element is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element, or there may be an intermediate element.

[0038] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A PCB optical inspection device, comprising a device body (1), wherein a second clamping block (3) is slidably connected to the upper end face of the device body (1), and a dust suction mechanism (11) is fixedly connected to the side face of the device body (1), characterized in that: It also includes a first clamping block (2), and a drive motor (4) is fixedly connected to the side of the second clamping block (3). The drive shaft of the drive motor (4) is connected to a transmission screw (5). One end of the transmission screw (5) is rotatably connected to the second clamping block (3) through a bearing (6). The other end of the transmission screw (5) passes through the second clamping block (3) and is threadedly adapted to the first clamping block (2). A guide post (7) is provided at one end of the second clamping block (3) facing the first clamping block (2). The other end of the guide post (7) passes through the first clamping block (2) and is slidably adapted to the first clamping block (2).

2. The PCB optical inspection device according to claim 1, characterized in that: Both the first clamping block (2) and the second clamping block (3) have slots (8) on their end faces, and the two slots (8) are at the same height.

3. The PCB optical inspection device according to claim 2, characterized in that: The slot (8) is provided with a rubber layer (9).

4. The PCB optical inspection device according to claim 3, characterized in that: The cross-section of the slot (8) on the first clamping block (2) is trumpet-shaped.

5. The PCB optical inspection device according to claim 4, characterized in that: A pressure sensor (10) is provided at the bottom of the slot (8) on the first clamping block (2).

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