Automatic line width measuring instrument

Abstract

The utility model discloses an automatic line width measuring instrument, which relates to the technical field of line width measurement, and is characterized in that a PCB (printed circuit board) to be detected is placed on the top surface of a vacuum adsorption mechanism, the PCB is completely flat under the vacuum adsorption action of the vacuum adsorption mechanism, the influence of board surface deformation on the measurement precision is avoided, and the detection precision is effectively improved. The longitudinal electric guide rail drives the supporting frame to move front and back, the transverse electric guide rail drives the moving block to move left and right, and finally the positioning assembly is driven to horizontally move front and back and left and right, so that the positioning assembly can rapidly move to a to-be-detected position. The optical refractor is used for reflecting and refracting light rays emitted by the detection light source generator and light rays reflected by the inclined surface of the wire, so that branch light rays of the emitted light rays and the reflected light rays horizontally enter the positioning assembly through the optical refractor; the positioning assembly is used for sensing the two branch light rays with the small distance so as to clearly distinguish the two branch light rays, and therefore the line width measurement result is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of line width measurement, in particular to an automatic line width measuring instrument. Background Art

[0002] After the PCB board is produced, it needs to be inspected, especially by measuring the wire width on the surface of the board to determine whether it is consistent with the wire design width required on the design circuit drawing to ensure the production quality of the PCB board. There are tiny inverted triangles or inverted trapezoids between the wires on the surface of the PCB board. The detection light source of the line width measuring instrument is used to illuminate the trapezoidal side of the bright metal surface. By measuring the distance between the reflected light, the sum of the upper and lower side lengths of the trapezoid after etching can be obtained. Subsequently, the cross-sectional area of ​​the etched wire can be obtained by measuring the thickness of the etching layer, so as to detect whether the etching condition of the PCB board meets the requirements.

[0003] The conventional lighting used in the currently widely used automatic line width measuring instruments cannot achieve clear discrimination of the tiny distance between two lines. In addition, since the test object is a very small object, a slight deformation of the board surface will cause a very large measurement error, ultimately leading to inaccurate line width measurement.

[0004] For this purpose, an automatic line width measuring instrument is proposed. Utility Model Content

[0005] The purpose of the utility model is to solve the problems mentioned in the above background technology and provide an automatic line width measuring instrument.

[0006] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0007] The automatic line width measuring instrument comprises an electrical box, wherein the four corners of the bottom surface of the electrical box are provided with movable support assemblies, a control console is fixedly installed on the upper side of the electrical box, a longitudinal electric guide rail is fixedly installed on the top surface of the electrical box, a support frame is fixedly installed on the surface of the movable part of the longitudinal electric guide rail, the number of the support frames is two and they are symmetrically arranged on the left and right, a supporting plate is fixedly installed on the top surface of the electrical box, the supporting plate and the longitudinal electric guide rail are arranged without contact, a vacuum adsorption mechanism is fixedly installed on the top surface of the supporting plate, a transverse electric guide rail is fixedly installed between the tops of the two support frames, a moving block is fixedly installed on the surface of the movable part of the transverse electric guide rail, a positioning assembly is fixedly installed on the front of the moving block, an optical refractor is fixedly installed on the side of the positioning assembly, a detection light source generator is fixedly installed on the top of the optical refractor, and the positioning assembly, the optical refractor and the detection light source generator are internally connected.

[0008] Furthermore, the top surface of the longitudinal electric guide rail and the front surface of the transverse electric guide rail are both provided with dust-proof brushes, and the support frame and the moving block are both movably arranged on the surface of the dust-proof brushes.

[0009] Furthermore, the mobile support assembly includes a support leg, a threaded pad and a roller. The support leg is fixedly installed at the four corners of the bottom surface of the electrical box. The threaded pad is threadedly installed on the surface of the support leg. The roller is fixedly installed at the four corners of the bottom surface of the electrical box. When the threaded pad is fully threadedly connected to the surface of the support leg, the threaded pad is suspended relative to the ground and the bottom surface of the roller is in contact with the ground.

[0010] Furthermore, the control console includes a table top, which is fixedly mounted on the upper side of the electrical box, a display is fixedly mounted on the rear of the top surface of the table top, control buttons are provided on the surface of the table top, a control circuit is integrated inside the table top, and the table top is electrically connected to the longitudinal electric guide rail, the transverse electric guide rail, the vacuum adsorption mechanism, the positioning assembly and the optical refractor.

[0011] Furthermore, the vacuum adsorption mechanism includes a vacuum generator and a porous plate, the vacuum generator is fixedly installed on the rear part of the top surface of the support plate, the output end of the vacuum generator is fixedly connected to an air pipe, the top surface of the vacuum generator is hinged with an inspection cover, the porous plate is fixedly installed on the front part of the top surface of the support plate, and the end of the air pipe away from the vacuum generator is connected to the inside of the porous plate.

[0012] Furthermore, the positioning component includes a light collecting tube, the light collecting tube is fixedly installed on the surface of the moving block, a positioning ring is fixedly installed on the bottom surface of the light collecting tube, a positioning light source receiver is fixedly installed on the top surface of the light collecting tube, the optical refractor is fixedly installed on the side of the light collecting tube, a reflector is provided inside the light collecting tube, the reflector and the optical refractor are symmetrically arranged on the left and right, the light collecting tube and the optical refractor are connected, and the positioning light source receiver is electrically connected to the table top.

[0013] The beneficial effects of the utility model are as follows:

[0014] The PCB board to be tested is placed on the top surface of the vacuum adsorption mechanism. The vacuum adsorption effect of the vacuum adsorption mechanism makes the PCB board completely flat, avoiding the influence of board surface deformation on the measurement accuracy, and effectively improving the detection accuracy. The support frame is driven to move forward and backward by the longitudinal electric guide rail, and the moving block is driven to move left and right by the transverse electric guide rail, and finally the positioning component is driven to move forward and backward and left and right, so that the positioning component can be quickly moved to the position to be tested. The positioning light source is emitted by the positioning component to be positioned near the detection position. The detection light source generator emits the detection light source downward, and the optical refractor is used to reflect and refract the light emitted by the detection light source generator and the light reflected by the inclined surface of the wire, so that the emitted light and the reflected light each have branch light rays entering the interior of the positioning component horizontally through the optical refractor. The positioning component senses the two branch light rays with a small spacing so as to clearly distinguish them. After calculation and processing by the control console, a high-accuracy line width measurement result can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the vacuum adsorption mechanism of the utility model in top section and the mounting frame in front section;

[0017] Figure 3 It is a rear view of the three-dimensional structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the positioning component of the utility model;

[0019] Figure numerals: 1. electrical box; 2. mobile support assembly; 201. support leg; 202. threaded pad; 203. roller; 3. control panel; 301. table; 302. display; 303. control button; 4. longitudinal electric guide rail; 5. support plate; 6. vacuum adsorption mechanism; 601. vacuum generator; 602. air pipe; 603. inspection cover; 604. porous plate; 7. dust-proof brush; 8. support frame; 9. transverse electric guide rail; 10. moving block; 11. positioning assembly; 111. light collecting tube; 112. positioning ring; 113. positioning light source receiver; 12. optical refractor; 13. detection light source generator. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figures 1 to 4 As shown, the automatic line width measuring instrument includes an electrical box 1, wherein a movable support assembly 2 is provided at the four corners of the bottom surface of the electrical box 1, a control console 3 is fixedly installed on the upper side of the electrical box 1, a longitudinal electric guide rail 4 is fixedly installed on the top surface of the electrical box 1, a support frame 8 is fixedly installed on the surface of the moving part of the longitudinal electric guide rail 4, the number of the support frames 8 is two and they are symmetrically arranged on the left and right, a supporting plate 5 is fixedly installed on the top surface of the electrical box 1, the supporting plate 5 is arranged without contact with the longitudinal electric guide rail 4, a vacuum adsorption mechanism 6 is fixedly installed on the top surface of the supporting plate 5, a transverse electric guide rail 9 is fixedly installed between the tops of the two support frames 8, a moving block 10 is fixedly installed on the surface of the moving part of the transverse electric guide rail 9, a positioning assembly 11 is fixedly installed on the front of the moving block 10, an optical refractor 12 is fixedly installed on the side of the positioning assembly 11, a detection light source generator 13 is fixedly installed on the top of the optical refractor 12, and the positioning assembly 11, the optical refractor 12 and the detection light source generator 13 are internally connected.

[0026] More specifically, the PCB board to be tested is placed on the top surface of the vacuum adsorption mechanism 6. The vacuum adsorption effect of the vacuum adsorption mechanism 6 makes the PCB board completely flat, avoiding the influence of board surface deformation on the measurement accuracy, and effectively improving the detection accuracy. The support frame 8 is driven to move forward and backward by the longitudinal electric guide rail 4, and the moving block 10 is driven to move left and right by the transverse electric guide rail 9, and finally the positioning component 11 is driven to move forward and backward and left and right, so that the positioning component 11 can quickly move to the position to be tested, and the positioning light source is emitted by the positioning component 11 to be positioned near the detection position. The detection light source generator 13 emits the detection light source downward, and when the detection light source passes through the optical refractor 12, it is partially reflected by the optical refractor 12. The horizontal light enters the positioning component 11, part of which passes through the optical refractor 12 and is refracted into useless light, and part of which passes through the optical refractor 12 vertically to the wire slope on the surface of the PCB board, and returns vertically to the optical refractor 12 after being reflected by two adjacent wire slopes. The light reflected by the wire slope partially passes through the optical refractor 12 when passing through the optical refractor 12 and is refracted into horizontal light. The refracted horizontal light enters the positioning component 11, and there is a distance difference between the horizontal light reflected by the optical refractor 12 when emitted. The positioning component 11 senses the two light beams with a small spacing and thus clearly distinguishes them. After calculation and processing by the control console 3, a line width measurement result with high accuracy can be obtained.

[0027] Dust-proof brushes 7 are provided on the top surface of the longitudinal electric guide rail 4 and the front surface of the transverse electric guide rail 9 , and the support frame 8 and the moving block 10 are movably arranged on the surface of the dust-proof brush 7 .

[0028] Specifically, dust is prevented by using the dust-proof brush 7 to prevent dust accumulation from affecting the flexibility and movement accuracy of the longitudinal electric guide rail 4 and the transverse electric guide rail 9 , thereby ensuring the positioning accuracy of the positioning assembly 11 .

[0029] The mobile support assembly 2 includes a support leg 201, a threaded pad 202 and a roller 203. The support leg 201 is fixedly installed at the four corners of the bottom surface of the electrical box 1, the threaded pad 202 is threadedly installed on the surface of the support leg 201, and the roller 203 is fixedly installed at the four corners of the bottom surface of the electrical box 1. When the threaded pad 202 is fully threadedly connected to the surface of the support leg 201, the threaded pad 202 is suspended relative to the ground and the bottom surface of the roller 203 is in contact with the ground.

[0030] Specifically, the threaded pad 202 can be rotated to make it rise and fall relative to the support leg 201. The roller 203 can be suspended in the air by rotating the threaded pad 202 to move it downward. When the threaded pad 202 contacts the ground, the automatic line width measuring instrument can be fixed. The roller 203 can be rotated to move it upward to make it contact the ground. When the threaded pad 202 is suspended in the air, the roller 203 can be used to quickly push the automatic line width measuring instrument to move flexibly.

[0031] The control console 3 includes a table top 301, which is fixedly installed on the upper side of the electrical box 1. A display 302 is fixedly installed on the rear of the top surface of the table top 301. Control buttons 303 are provided on the surface of the table top 301. A control circuit is integrated inside the table top 301. The table top 301 is electrically connected to the longitudinal electric guide rail 4, the transverse electric guide rail 9, the vacuum adsorption mechanism 6, the positioning component 11 and the optical refractor 12.

[0032] Specifically, in coordination with the display of the display 302, corresponding control signals are sent to the integrated circuit through several different control buttons 303, and then the longitudinal electric guide rail 4, the transverse electric guide rail 9, the vacuum adsorption mechanism 6, the positioning component 11 and the optical refractor 12 are controlled. The position of the positioning component 11 is adjusted by controlling the longitudinal electric guide rail 4 and the transverse electric guide rail 9, and the PCB board is adsorbed and flattened or the adsorption is ended by controlling the start and stop of the vacuum adsorption mechanism 6. The line width measurement of a specific area is completed by controlling the positioning component 11 and the optical refractor 12.

[0033] The vacuum adsorption mechanism 6 includes a vacuum generator 601 and a porous plate 604. The vacuum generator 601 is fixedly installed on the rear part of the top surface of the supporting plate 5. The output end of the vacuum generator 601 is fixedly connected to an air pipe 602. An inspection cover 603 is hinged on the top surface of the vacuum generator 601. The porous plate 604 is fixedly installed on the front part of the top surface of the supporting plate 5. The end of the air pipe 602 away from the vacuum generator 601 is connected to the inside of the porous plate 604.

[0034] Specifically, the PCB board to be tested is placed on the top surface of the porous plate 604, and the vacuum generator 601 is used to suck air to form an air duct through the air pipe 602 and the holes on the surface of the porous plate 604. The suction force is used to make the PCB board close to the top surface of the porous plate 604 and be flattened. The vacuum generator 601 is continuously operated to reduce the air density between the bottom surface of the PCB board and the porous plate 604, so that it is reliably adsorbed on the surface of the porous plate 604 under the action of atmospheric pressure. When the test is completed, air is blown into the air pipe 602 and the porous plate 604 through the vacuum generator 601. After the air pressure is reduced, the PCB board can be easily removed, and the vacuum generator 601 can be repaired by turning open the inspection cover 603.

[0035] The positioning assembly 11 includes a light collecting tube 111, which is fixedly installed on the surface of the moving block 10. A positioning ring 112 is fixedly installed on the bottom surface of the light collecting tube 111, a positioning light source receiver 113 is fixedly installed on the top surface of the light collecting tube 111, an optical refractor 12 is fixedly installed on the side of the light collecting tube 111, a reflector is provided inside the light collecting tube 111, the reflector and the optical refractor 12 are symmetrically arranged on the left and right, the light collecting tube 111 and the optical refractor 12 are connected, and the positioning light source receiver 113 is electrically connected to the table 301.

[0036] Specifically, during positioning, the area to be detected is roughly circled by the positioning circle 112, and then the positioning light source transceiver 113 is used to emit light vertically downward for accurate positioning. When measuring the line width, the horizontal light formed by reflection from the two adjacent wire slopes and refracted by the optical refractor 12, and the horizontal light formed by reflection from the optical refractor 12 when the detection light source generator 13 is initially emitted are both emitted to the reflector inside the light collecting tube 111, and after reflection by the reflector, they are emitted vertically upward inside the light collecting tube 111 to the positioning light source transceiver 113. The two light rays are sensed by the positioning light source transceiver 113, and the sensing signal is transmitted to the table 301. The line width data is obtained after calculation and processing by the table 301.

[0037] In summary: the PCB board to be detected is placed on the top surface of the vacuum adsorption mechanism 6, and the vacuum adsorption effect of the vacuum adsorption mechanism 6 makes the PCB board completely flat, avoiding the influence of board surface deformation on the measurement accuracy, and effectively improving the detection accuracy. The longitudinal electric guide rail 4 drives the support frame 8 to move forward and backward, and the transverse electric guide rail 9 drives the moving block 10 to move left and right, and finally drives the positioning component 11 to move forward and backward and left and right, so that the positioning component 11 can quickly move to the position to be detected, and the positioning light source is emitted by the positioning component 11 to be positioned near the detection position. The detection light source generator 13 emits the detection light source downward, and the optical refractor 12 is used to reflect and refract the light emitted by the detection light source generator 13 and the light reflected by the inclined surface of the wire, so that the emitted light and the reflected light each have branch light rays that enter the interior of the positioning component 11 horizontally through the optical refractor 12, and the two branch light rays with a small spacing are sensed by the positioning component 11 so as to be clearly distinguished. After calculation and processing by the control console 3, a line width measurement result with high accuracy can be obtained.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. Automatic line width measuring instrument, characterized in that: The invention comprises an electrical box (1), wherein the four corners of the bottom surface of the electrical box (1) are provided with a movable support assembly (2), a control panel (3) is fixedly installed on the upper side of the electrical box (1), a longitudinal electric guide rail (4) is fixedly installed on the top surface of the electrical box (1), a support frame (8) is fixedly installed on the surface of the movable part of the longitudinal electric guide rail (4), the number of the support frames (8) is two and they are arranged symmetrically on the left and right, a support plate (5) is fixedly installed on the top surface of the electrical box (1), the support plate (5) is arranged without contact with the longitudinal electric guide rail (4), and the top surface of the support plate (5) is fixedly installed A vacuum adsorption mechanism (6) is installed, a transverse electric guide rail (9) is fixedly installed between the tops of the two support frames (8), a moving block (10) is fixedly installed on the surface of the moving part of the transverse electric guide rail (9), a positioning component (11) is fixedly installed on the front of the moving block (10), an optical refractor (12) is fixedly installed on the side of the positioning component (11), a detection light source generator (13) is fixedly installed on the top of the optical refractor (12), and the positioning component (11), the optical refractor (12) and the detection light source generator (13) are internally connected.

2. The automatic line width measuring instrument according to claim 1, characterized in that: The top surface of the longitudinal electric guide rail (4) and the front surface of the transverse electric guide rail (9) are both provided with dustproof brushes (7), and the support frame (8) and the moving block (10) are both movably arranged on the surface of the dustproof brushes (7).

3. The automatic line width measuring instrument according to claim 1, characterized in that: The mobile support assembly (2) comprises a support leg (201), a threaded pad (202) and a roller (203); the support leg (201) is fixedly mounted at the four corners of the bottom surface of the electrical box (1); the threaded pad (202) is threadedly mounted on the surface of the support leg (201); the roller (203) is fixedly mounted at the four corners of the bottom surface of the electrical box (1); when the threaded pad (202) is completely threadedly connected to the surface of the support leg (201), the threaded pad (202) is suspended relative to the ground, and the bottom surface of the roller (203) is in contact with the ground.

4. The automatic line width measuring instrument according to claim 1, characterized in that: The control console (3) comprises a table top (301), the table top (301) is fixedly mounted on the upper side of the electrical box (1), a display (302) is fixedly mounted on the rear of the top surface of the table top (301), a control button (303) is provided on the surface of the table top (301), a control circuit is integrated inside the table top (301), and the table top (301) is electrically connected to the longitudinal electric guide rail (4), the transverse electric guide rail (9), the vacuum adsorption mechanism (6), the positioning assembly (11) and the optical refractor (12).

5. The automatic line width measuring instrument according to claim 1, characterized in that: The vacuum adsorption mechanism (6) comprises a vacuum generator (601) and a porous plate (604); the vacuum generator (601) is fixedly mounted on the rear portion of the top surface of the support plate (5); an air pipe (602) is fixedly connected to the output end of the vacuum generator (601); an inspection cover (603) is hingedly mounted on the top surface of the vacuum generator (601); the porous plate (604) is fixedly mounted on the front portion of the top surface of the support plate (5); and an end of the air pipe (602) away from the vacuum generator (601) is connected to the interior of the porous plate (604).

6. The automatic line width measuring instrument according to claim 4, characterized in that: The positioning assembly (11) comprises a light collecting tube (111), the light collecting tube (111) is fixedly mounted on the surface of the moving block (10), a positioning ring (112) is fixedly mounted on the bottom surface of the light collecting tube (111), a positioning light source transceiver (113) is fixedly mounted on the top surface of the light collecting tube (111), the optical refractor (12) is fixedly mounted on the side of the light collecting tube (111), a reflector is arranged inside the light collecting tube (111), the reflector and the optical refractor (12) are arranged symmetrically on the left and right, the light collecting tube (111) and the optical refractor (12) are connected, and the positioning light source transceiver (113) is electrically connected to the table top (301).

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