A PCB board appearance defect auxiliary observation device

Abstract

The present invention relates to an optical auxiliary observation device, and relates to an auxiliary observation device for appearance defects of a PCB board, comprising: a base with its center of gravity at the bottom; a bottom support plate, obliquely installed on the base; an upper cover plate, installed on the bottom support plate; a gap is left between the bottom support plate and the upper cover plate to accommodate the passage of a sheet to be inspected, the edges on both sides of the bottom support plate are inclined surfaces, and a plurality of observation notches are evenly spaced on the upper cover plate; a movable frame, slidably arranged in the observation notches; and a convex lens, arranged in the movable frame. The present invention sets a plurality of observation notches on the upper cover plate, and slides a convex lens in each observation notch, and moves the convex lens with the sliding movable frame to magnify and observe a designated area of ​​the PCB board, thereby dividing the observation area into multiple areas when inspecting the PCB board, reducing the search range of the naked eye, reducing the difficulty of inspection, and making the inspection simpler and more effective.

Description

Technical Field

[0001] The present invention relates to optical auxiliary observation equipment, and in particular to an auxiliary observation equipment for appearance defects of a PCB board. Background Art

[0002] During the processing of PCB boards, it is necessary to inspect the appearance defects of the sheet materials and film materials used in each link. The purpose of the inspection is to eliminate materials with scratches, bulges and breakpoints on the surface to prevent these defective products from flowing into the subsequent processing links.

[0003] During the appearance inspection process, quality random inspections will be carried out manually. Some samples from the same batch of materials will be taken for manual visual inspection. A convex lens will be used for auxiliary inspection. The convex lens is supported by a support frame, and lamp beads are arranged around the edge of the convex lens. When in use, the lamp beads are lit and the material is placed under a large convex lens for observation. The defects on the board are checked by moving the PCB board. The main defect of this usage method is that when people observe directly, they check the material as a whole. The entire appearance of the PCB board falls completely within the field of vision. At this time, the field of vision searched by the naked eye through the convex lens is too large. After a long period of inspection, the eyes are prone to fatigue, and the inspection difficulty increases during continuous inspection. It is difficult to detect local subtle defects on the material in subsequent inspections. Summary of the invention

[0004] The present invention aims to solve the technical problems existing in the above-mentioned prior art. To this end, the present invention provides an auxiliary observation device for PCB board appearance defects.

[0005] To achieve the above-mentioned purpose, the present invention provides such a PCB board appearance defect auxiliary observation device, comprising: a base with its center of gravity at the bottom; a bottom support plate, obliquely installed on the base; an upper cover plate, installed on the bottom support plate; a gap is left between the bottom support plate and the upper cover plate to accommodate the passage of the sheet to be inspected, the edges on both sides of the bottom support plate are inclined surfaces, and a plurality of observation notches are evenly spaced on the upper cover plate; a movable frame, slidably arranged in the observation notches; and a convex lens is arranged in the movable frame.

[0006] As a further improvement of the scheme, it also includes: guide rods, installed on both sides of the upper cover plate; shielding belts, which are coaxially wound into rolls with the synchronous wheels in groups of two and then rotated together on the guide rods on both sides; the shielding belts and the synchronous wheels are arranged in multiple groups according to the number of the movable frames, and the width of the shielding belts is adapted to the observation notch, and the shielding belts on both sides are stretched and straightened and then fixed on both sides of the movable frame respectively.

[0007] As a further improvement of the solution, it also includes: a synchronous belt, which is passed through the upper cover plate and wrapped around the synchronous wheels on both sides; a belt groove allowing the synchronous belt to be embedded is opened on the side of the upper cover plate facing the bottom support plate.

[0008] As a further improvement of the scheme, it also includes: a plurality of dividing openings, which are evenly spaced on the bottom support plate according to the number of the movable frames; a dividing plate, which is slidably arranged in the dividing opening; and a push-pull paddle, one side of which is a straight edge and the other side is an arc edge, which is rotatably arranged on the dividing plate and rests against the bottom support plate.

[0009] As a further improvement of the solution, it also includes: a plurality of push ports, which are evenly spaced on the bottom support plate according to the number of the movable frames; a stabilizing plate, which is evenly installed on the bottom support plate and spans the push ports; and a hook plate, which is slidably disposed in the push ports.

[0010] As a further improvement of the solution, it also includes: a marking brush block, which is inserted into the movable frame and maintained in a raised state by a spring.

[0011] As a further improvement of the scheme, it also includes: a lamp group arranged on both sides of the bottom of the movable frame; a power connection slot opened on both sides of the movable frame; a power supply slide rod arranged on both side walls in sliding contact with the upper cover plate and matched with the power connection slot.

[0012] As a further improvement of the scheme, the convex lens is divided into an upper convex mirror and a lower convex mirror separated from each other, which further includes: a frame, which is mounted on the edges of the upper convex mirror and the lower convex mirror, and the upper convex mirror is slidably arranged on the movable frame through the frame, and the lower convex mirror is fixed to the lower part of the movable frame through the frame.

[0013] As a further improvement of the scheme, it also includes: a lifting groove, which is obliquely opened on both sides of the frame of the upper convex mirror; slideways are opened on both sides of the movable frame at the same position as the lifting groove; and a stop block, which is slidably arranged in the slideway, and the protrusion provided on the stop block is pressed against the lifting groove.

[0014] As a further improvement of the solution, the lifting grooves provided on both sides of the frame of the upper convex mirror are inclined in opposite directions.

[0015] The present invention brings at least the following effects:

[0016] 1. The present invention sets a plurality of observation notches on the upper cover plate, and slides a convex lens in each observation notch. After the PCB board to be inspected for appearance is placed in the gap between the upper cover plate and the bottom support plate, the sliding movable frame moves with the convex lens to magnify and observe the designated area of ​​the PCB board. In this way, the observation area is divided into multiple areas when inspecting the PCB board, which reduces the search range of the naked eye, reduces the difficulty of naked eye inspection, and makes the inspection simpler and more effective.

[0017] 2. The present invention can shield other parts of the PCB board that are not in the area covered by the convex lens through the shielding belt, so as to prevent the PCB board in the part not covered by the convex lens from entering the observation line of sight and interfering with the inspection of the inspector.

[0018] 3. The partition plate provided in the present invention can divide the gap space between the bottom support plate and the upper cover plate, so that PCB boards of different sizes can be placed in and effective inspection can be achieved; at the same time, in conjunction with the provided marking brush block, the PCB boards with corresponding defective areas can be quickly marked.

[0019] 4. The present invention configures the convex lens to be an upper convex mirror and a lower convex mirror whose upper and lower parts can slide relative to each other to adjust the spacing, and thereby adjusts the magnification of the convex lens, which can achieve better inspection effects when dealing with PCB boards with complex and dense components on the board surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a complete schematic diagram of the present invention.

[0021] Figure 2 For the present invention Figure 1 Schematic diagram with the base hidden.

[0022] Figure 3 For the present invention Figure 2 Schematic diagram from another perspective.

[0023] Figure 4 For the present invention Figure 2 Partial schematic diagram.

[0024] Figure 5 For the present invention, Figure 2 Schematic diagram of some parts after disassembly.

[0025] Figure 6 For the present invention Figure 5 Schematic diagram from another perspective.

[0026] Figure 7 It is a schematic diagram of the movable frame, shielding belt, synchronous wheel and marking brush block of the present invention.

[0027] Figure 8It is a schematic diagram of the upper convex mirror, the lower convex mirror and the stop block of the present invention.

[0028] Fig. 9 For the present invention Figure 8 Schematic diagram from another perspective.

[0029] The corresponding relationship between the reference numerals and the names of the components in the accompanying drawings is as follows:

[0030] 1-base, 2-bottom support plate, 21-inclined surface, 3-upper cover plate, 4-observation notch, 5-movable frame, 6-convex lens;

[0031] 7-guide rod, 8-shielding belt, 9-synchronizing wheel;

[0032] 10- synchronous belt, 101- belt groove;

[0033] 11-dividing opening, 12-dividing plate, 13-push-pull paddle;

[0034] 14-push port, 15-stabilizing plate, 16-hook plate;

[0035] 17-Marking brush block;

[0036] 18-lamp group, 19-power connection slot, 191-power supply slide bar;

[0037] 61-upper convex mirror, 62-lower convex mirror, 63-frame;

[0038] 64-lifting slot, 65-slideway, 66-block. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] The present invention specifically discloses a PCB board appearance defect auxiliary observation device, such as Figure 1-Figure 7 As shown, it includes: a base 1 with a counterweight installed at the bottom to make the center of gravity at the bottom, a bottom support plate 2 is fixedly connected to the top of the base 1 at an angle, an upper cover plate 3 is fixedly installed on the bottom support plate 2, the outer dimensions of the bottom support plate 2 and the upper cover plate 3 are adapted, a gap is left between the bottom support plate 2 and the upper cover plate 3, and a PCB board that needs to be inspected for appearance is placed between the bottom support plate 2 and the upper cover plate 3 through the gap. In order to facilitate the better insertion of the PCB board into the gap, the edges on both sides of the bottom support plate 2 are also set as inclined surfaces 21.

[0042] like Figure 4 As shown, five observation notches 4 are evenly arranged on the upper cover plate 3, and the spacing thickness between the multiple observation notches 4 is about 3 mm. Too large a spacing thickness will cover a larger range of the PCB board, resulting in the covered part being unable to be inspected. A movable frame 5 is slidably set in the observation notch 4, and a convex lens 6 is installed on the movable frame 5. The convex lens 6 is square and follows the movement of the movable frame 5. The square convex lens 6 can be adapted to the straight edges on both sides of the observation notch 4 to the maximum extent to obtain a larger field of view. When in use, insert the PCB board to be inspected between the bottom support plate 2 and the upper cover plate 3. You can choose to proceed area by area from top to bottom or from bottom to top according to the distribution position of the observation notch 4 as needed. If you choose to proceed area by area from bottom to top, you can push the bottom movable frame 5 to move with the convex lens 6, and the inspector's eyes follow the movement of the convex lens 6. Through the convex lens 6, the appearance of the PCB board after the picture is magnified is inspected, and the area is marked after the surface defects are detected. After the inspection of the PCB board in the bottom area is completed, repeat the above steps to inspect the PCB boards in the remaining areas. In this way, the observation area is divided into multiple areas when inspecting the PCB board. When inspecting, you only need to let your eyes follow the moving convex lens 6 for inspection, which shortens the search range of the naked eye, reduces the difficulty of inspection, and makes the inspection simpler and more effective.

[0043] according to Figure 5-Figure 6As shown, guide rods 7 are fixedly installed on both sides of the upper cover plate 3, and the shielding belt 8 is rolled up and shares the same rotating shaft with the synchronous wheel 9 to form an assembly, and two assemblies are grouped as a group and are respectively rotatably arranged on the guide rods 7 on both sides; multiple groups of assemblies are arranged according to the number of movable frames 5, and the width of the shielding belt 8 is adapted to the observation gap 4, so that the observation gap 4 can be covered, and the shielding belts 8 on both sides are stretched and straightened and fixed on both sides of the movable frame 5 respectively, so as to block other areas of the observation gap 4 not covered by the movable frame 5, and in the process of moving the movable frame 5, the rolled shielding belts 8 on both sides will be pulled to adaptively follow the release and The shielding tape 8 is folded up to keep the shielding tape 8 always covering other areas of the observation gap 4 not covered by the movable frame 5; the purpose of this arrangement is that both the PCB board covered by the movable frame 5 and the PCB board outside the movable frame 5 need to be inspected, but in order to focus the inspector's eyes on the movable frame 5 with the convex lens 6 to avoid the eyes leaving the movable frame 5, at this time, after covering other areas of the observation gap 4 not covered by the movable frame 5, the inspectable area is limited to the range of the movable frame 5, so that when the inspector inspects the PCB board, he can concentrate his eyes on the PCB board in the designated area and is not easily disturbed by other areas.

[0044] In order to ensure that the shielding belts 8 on both sides can maintain synchronous retraction and extension, the synchronous wheels 9 on both sides that rotate along with each other achieve synchronous rotation by winding a synchronous belt 10 together. The synchronous belt 10 is passed through the upper cover plate 3 and wound around the synchronous wheels 9 on both sides. In order to prevent the synchronous belt 10 from getting stuck on the PCB board, a belt groove 101 is opened on the side of the upper cover plate 3 facing the bottom support plate 2 to allow the synchronous belt 10 to be embedded. After the synchronous belt 10 is placed in the belt groove 101, the synchronous belt 10 can be prevented from getting stuck on the PCB board.

[0045] like Figure 5 and Figure 6As shown, it also includes: a plurality of splitting openings 11 are evenly spaced on the bottom support plate 2 according to the number of movable frames 5, a splitting plate 12 is slidably installed in the splitting opening 11, and the position of the splitting plate 12 corresponds to the spacing area between the observation notches 4, and the gap between the bottom support plate 2 and the upper cover plate 3 can be divided into multiple areas by the provided splitting plate 12. When inspecting PCB boards of different sizes, the splitting plate 12 can be pushed to press against the upper cover plate 3, so that a smaller PCB board can be placed with the help of the splitting plate 12, and a push-pull paddle 13 is rotatably provided on the splitting plate 12, one side of the push-pull paddle 13 is a straight edge, and the other side is an arc edge. When the push-pull paddle 13 is rotated, the push-pull paddle 13 is rotated. After the straight edge of the sheet 13 is against the bottom support plate 2, the partition plate 12 can be made to rest against the upper cover plate 3, and when the arc edge of the push-pull paddle 13 is against the bottom support plate 2, the partition plate 12 slides and disengages from the upper cover plate 3; a plurality of push ports 14 are evenly spaced on the bottom support plate 2 according to the number of movable frames 5, and a stabilizing plate 15 is evenly spaced and installed on the bottom support plate 2 and spans the push port 14. By setting the stabilizing plate 15, the bottom support plate 2 can be further reinforced to prevent breakage. A hook plate 16 is slidably provided in the push port 14. When a PCB board is placed in the gap between the bottom support plate 2 and the upper cover plate 3, the PCB board can be conveniently and quickly pushed out through the hook plate 16.

[0046] like Figure 6 and Figure 8 As shown, it also includes: lamp groups 18 are installed on both sides of the bottom of the movable frame 5, power connection grooves 19 are opened on both sides of the movable frame 5, power supply slides 191 are arranged on the side walls on both sides that are in sliding contact with the upper cover plate 3, and the power supply slides 191 are slidably fitted with the power connection grooves 19. After the lamp group 18 is connected to the power connection grooves 19, power is supplied through the power supply slides 191. In order to keep the environment at the bottom of the movable frame 5 bright and conducive to observation, the lamp group 18 can be turned on by a switch set on the upper cover plate 3 during use; after defects are detected on the PCB board, the marking brush block 17 that is penetrated on the movable frame 5 can be pressed down to smear and mark the PCB board to indicate the presence of a defective area, and the marking brush block 17 is kept in a raised state by a spring, and after the marking brush block 17 is released, it will bounce up by itself and no longer contact the PCB board.

[0047] like Figure 8 and Fig. 9As shown, the convex lens 6 is divided into an upper convex mirror 61 and a lower convex mirror 62 which can be separated from each other, and the upper convex mirror 61 and the lower convex mirror 62 are both square, wherein a frame 63 is fixedly mounted on the edges of the upper convex mirror 61 and the lower convex mirror 62, and the upper convex mirror 61 is slidably set on the upper part of the movable frame 5 through the frame 63, and the lower convex mirror 62 is fixedly set on the lower part of the movable frame 5 through the frame 63. The distance between the upper convex mirror 61 and the lower convex mirror 62 can be adjusted by sliding the upper convex mirror 61, so that the magnification of the PCB board seen through the upper convex mirror 61 and the lower convex mirror 62 will be different. Therefore, when the components are arranged more densely on the PCB board, a larger magnification can be obtained by adjusting the position of the upper convex mirror 61. In order to facilitate the adjustment of the relative position of the upper convex mirror 61, lifting grooves 64 are obliquely provided on both sides of the frame 63 of the upper convex mirror 61, and the lifting grooves 64 on both sides are inclined in opposite directions, one side is higher on the left and lower on the right, and the other side is lower on the left and higher on the right. Slideways 65 are provided on both sides of the movable frame 5 at the same position of the lifting grooves 64. A stopper 66 is slidably connected in the slideway 65, and a protrusion is provided on the stopper 66, which is pressed against the lifting groove 64. By horizontally shifting the stopper 66, the height position of the upper convex mirror 61 can be changed, thereby realizing the adjustment of the multiple of the convex lens 6. The lifting grooves 64 on both sides are inclined in opposite directions, one side is higher on the left and lower on the right, and the other side is lower on the left and higher on the right. The purpose of moving in the opposite direction is that if the height of the upper convex mirror 61 needs to change, the movement trajectory of the stop blocks 66 on both sides is completed by approaching or moving away from each other. If the stop blocks 66 on both sides move in the same direction, the force applied to the frame 63 of the upper convex mirror 61 will make the frame 63 tilt against the side wall of the movable frame 5, resulting in the frame 63 being unable to slide up and down, thereby making the stop blocks 66 slide in a manner of approaching or moving away from each other. Then the stop blocks 66 push the frame 63 upward together by the force dispersed on both sides of the frame 63, which can make the frame 63 move up and down more smoothly without getting stuck.

[0048] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A PCB board appearance defect auxiliary observation device, comprising: A base (1) with its center of gravity at the bottom; The bottom support plate (2) is obliquely mounted on the base (1); it is characterized by further comprising: an upper cover plate (3) mounted on the bottom support plate (2); a gap is left between the bottom support plate (2) and the upper cover plate (3) for accommodating the passage of the sheet material to be inspected, the edges on both sides of the bottom support plate (2) are inclined surfaces (21), and a plurality of observation notches (4) are evenly spaced on the upper cover plate (3); a movable frame (5) is slidably arranged in the observation notch (4); and a convex lens (6) is arranged in the movable frame (5); It also includes: guide rods (7) installed on both sides of the upper cover plate (3); shielding belts (8) are coaxially wound with synchronous wheels (9) in pairs and then rotated together and arranged on the guide rods (7) on both sides; the shielding belts (8) and the synchronous wheels (9) are arranged in multiple groups according to the number of the movable frames (5), and the width of the shielding belts (8) is adapted to the observation notch (4), and the shielding belts (8) on both sides are stretched and straightened and fixed on both sides of the movable frame (5); it also includes: a synchronous belt (10) that passes through the upper cover plate (3) and is wound on the synchronous wheels (9) on both sides; a belt groove (101) is opened on the side of the upper cover plate (3) facing the bottom support plate (2) to allow the synchronous belt (10) to be embedded; It also comprises: a plurality of splitting openings (11) which are evenly spaced on the bottom support plate (2) according to the number of the movable frames (5); a splitting plate (12) which is slidably arranged in the splitting opening (11); and a push-pull paddle (13) which has a straight edge on one side and an arc edge on the other side, which is rotatably arranged on the splitting plate (12) and abuts against the bottom support plate (2); It also includes: a plurality of push openings (14) which are evenly spaced apart on the bottom support plate (2) according to the number of the movable frames (5); a stabilizing plate (15) which is evenly spaced apart and installed on the bottom support plate (2) and straddles the push openings (14); and a hook plate (16) which is slidably disposed in the push openings (14).

2. The PCB board appearance defect auxiliary observation device according to claim 1 is characterized in that: Also includes: The marking brush block (17) is inserted into the movable frame (5) and is kept in a raised state by a spring.

3. The PCB board appearance defect auxiliary observation device according to claim 2 is characterized in that: Also includes: The lamp groups (18) are arranged on both sides of the bottom of the movable frame (5); the power connection slots (19) are opened on both sides of the movable frame (5); and the power supply slide bars (191) are arranged on both side walls in sliding contact with the upper cover plate (3) and fit with the power connection slots (19).

4. The PCB board appearance defect auxiliary observation device according to claim 1, characterized in that: The convex lens (6) is divided into an upper convex mirror (61) and a lower convex mirror (62) which are separated from each other, and further comprises: a frame (63) which is sleeved on the edges of the upper convex mirror (61) and the lower convex mirror (62); the upper convex mirror (61) is slidably arranged on the movable frame (5) through the frame (63); and the lower convex mirror (62) is fixedly arranged on the lower part of the movable frame (5) through the frame (63).

5. The PCB board appearance defect auxiliary observation device according to claim 4 is characterized in that: Also includes: A lifting groove (64) is obliquely provided on both sides of the frame (63) of the upper convex mirror (61); slideways (65) are provided on both sides of the movable frame (5) at the same position as the lifting groove (64); and a stop block (66) is slidably provided in the slideway (65), and a protrusion provided on the stop block abuts against the lifting groove (64).

6. The PCB board appearance defect auxiliary observation device according to claim 5, characterized in that: The lifting grooves (64) provided on both sides of the frame (63) of the upper convex mirror (61) have opposite inclination directions.

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