PCB expansion coefficient automatic measuring device

Abstract

This utility model discloses an automatic PCB expansion and contraction coefficient measuring device, comprising: a base; a test ring plate fixedly disposed on the base, the inner ring area of ​​the test ring plate being a test area; and a clamping test component, including a positioning plate disposed inside the test area and a pointer disposed at one end of the positioning plate. A height measuring groove is opened on one side of the positioning plate, and a height measuring plate is movable up and down inside. This utility model has the following beneficial effects: by using the clamping test component, the length and height (thickness) of the PCB board can be measured simultaneously during the clamping and positioning process, preventing the PCB board from moving during measurement. The positioning plate of the clamping test component can push and clamp the PCB board. During the clamping process, the pointer spacing of the positioning plate can be measured through a scale plate, thereby measuring the length of the PCB board. At the same time, the height measuring plate presses on the PCB board, causing the pointer to move up and down, thereby obtaining the height (thickness) of the PCB board from the pointer height, achieving the effect of clamping measurement.

Description

Technical Field

[0001] This utility model relates to the field of PCB board processing, and in particular to an automatic measurement device for PCB expansion and contraction coefficient. Background Technology

[0002] Printed circuit boards (PCBs), as a key component of modern electronic devices, are widely used in consumer electronics, communication equipment, industrial control, automotive electronics, and many other fields. In the PCB manufacturing process, dimensional accuracy is one of the key factors affecting its performance and reliability, and PCB expansion and contraction has become a significant challenge restricting the improvement of dimensional accuracy.

[0003] To address the issue of PCB expansion and contraction, manufacturers typically need to perform multiple manual measurements and adjustments during the production process. This not only consumes a significant amount of manpower and time but also easily introduces human error, severely restricting the improvement of production efficiency and failing to meet the market's demand for rapid delivery. Therefore, an automatic PCB expansion and contraction coefficient measurement device is needed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an automatic measurement device for the expansion and contraction coefficient of PCBs, thereby solving the problem that PCBs are not easy to measure automatically.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An automatic measurement device for PCB expansion and contraction coefficient, comprising:

[0007] Base;

[0008] A test ring plate is fixedly mounted on the base, and the inner ring area of ​​the test ring plate is the test area;

[0009] The clamping test assembly includes a positioning plate disposed inside the test area and a pointer disposed at one end of the positioning plate. A height measuring groove is opened on one side of the positioning plate, and a height measuring plate is movable up and down inside it. A connecting groove is opened at one end of the positioning plate located at the pointer, and a connecting plate connected to the height measuring plate and the pointer is disposed inside it. The height measuring groove and the connecting groove are interconnected and form an L-shaped structure.

[0010] A scale plate is fixed on the base and located on one side of the test ring plate, with one end of the pointer attached to one side of the scale plate.

[0011] Furthermore, a buffer hole is provided at one end of the connecting plate, and a buffer rod that is adapted to the buffer hole protrudes from the end of the pointer that is connected to the connecting plate. The buffer rod is inserted into the interior of the buffer hole.

[0012] Furthermore, a stabilizing plate is fixed at one end of the positioning plate on one side of the pointer, a stabilizing groove is formed on one side of the stabilizing plate, a stabilizing block is fixed on one side of the pointer, and the stabilizing block is located inside the stabilizing groove.

[0013] Furthermore, the stabilizing groove includes a vertical groove and a longitudinal groove in a cross shape, and the stabilizing block is located at the junction of the vertical groove and the longitudinal groove.

[0014] Furthermore, a miniature telescopic rod is installed on the top of the positioning plate at the position of the connecting plate, and the output end of the telescopic rod is connected to the connecting plate for moving the height measuring plate up and down.

[0015] Furthermore, the test ring plate has a first slot and a second slot respectively at both ends of the positioning plate. One end of the positioning plate slides inside the second slot, and the other end of the positioning plate is fixed with a connecting plate. The connecting plate slides inside the first slot and extends to the outside of the test ring plate.

[0016] Furthermore, a motor is installed on the base, and a rotating rod is connected to the output end of the motor. The connecting plate is sleeved on the rotating rod.

[0017] Furthermore, the outer surface of the rotating rod is provided with two sets of symmetrical threaded grooves, and the number of clamping test components is set to two. Both clamping test components are threadedly connected to the rotating rod and are symmetrically arranged on the rotating rod.

[0018] Furthermore, a turntable is mounted on the top of the base at the center point of the test area.

[0019] Furthermore, the scale plate is made of transparent glass, and its outer surface is provided with fluorescent scale lines.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By using the clamping test assembly, the length and height (thickness) of the PCB board are measured simultaneously during the clamping and positioning process, preventing the PCB board from moving during measurement. The positioning plate of the clamping test assembly can push and clamp the PCB board. During the clamping process, the pointer spacing of the positioning plate can be measured through the scale plate, thereby measuring the length of the PCB board. At the same time, the height measuring plate is pressed on the PCB board, causing the pointer to move up and down, thereby obtaining the height (thickness) of the PCB board from the pointer height, achieving the effect of clamping and measurement.

[0022] 2. Through the motor and rotating rod, and the threaded groove on the rotating rod, the motor can drive the two positioning plates to move closer or further apart at the same time. This ensures that the two positioning plates can push the PCB board to the center of the test area, so that the pointer can symmetrically indicate on the scale plate, making it easy for the staff to calculate the length of the PCB board through the scale plate. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0025] Figure 1 This is a three-dimensional schematic diagram of the whole system.

[0026] Figure 2 This is a schematic diagram of the overall top-down sectional view;

[0027] Figure 3 A three-dimensional schematic diagram of the clamping test component;

[0028] Figure 4 A top-view cross-sectional diagram of the clamping test component;

[0029] Figure 5 This is a three-dimensional schematic diagram of the stabilizing plate.

[0030] Illustration: 1. Base; 2. Test ring plate; 3. First slot; 4. Second slot; 5. Positioning plate; 6. Connecting plate; 7. Motor; 8. Rotating rod; 9. Turntable; 10. Pointer; 11. Stabilizing plate; 12. Stabilizing groove; 13. Stabilizing block; 14. Height measuring plate; 15. Connecting plate; 16. Buffer hole; 17. Scale plate; 18. Height measuring groove; 19. Connecting groove. Detailed Implementation

[0031] To make the utility model's objectives, features, and advantages more apparent and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0032] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] This utility model embodiment provides an automatic PCB expansion and contraction coefficient measurement device. Please refer to [link / reference]. Figures 1-4 The device includes: a base 1, a test ring plate 2, a clamping test assembly, and a scale plate 17; the test ring plate 2 is fixedly mounted on the base 1, and the inner ring area of ​​the test ring plate 2 is the test area; the clamping test assembly includes a positioning plate 5 located inside the test area and a pointer 10 located at one end of the positioning plate 5; a height measuring groove 18 is opened on one side of the positioning plate 5, and a height measuring plate 14 is movable up and down inside the positioning plate 5; a connecting groove 19 is opened at one end of the positioning plate 5 located at the pointer 10, and a connecting plate 15 connected to the height measuring plate 14 and the pointer 10 is provided inside the positioning plate 5; the height measuring groove 18 and the connecting groove 19 are interconnected and form an L-shaped structure; the scale plate 17 is fixedly mounted on the base 1 and located on one side of the test ring plate 2, and one end of the pointer 10 is attached to one side of the scale plate 17.

[0035] like Figures 1-4 As shown, the base 1 structure can provide a reference measurement plane (flatness ≤ 0.01 mm / m). 2To suppress environmental vibration interference and ensure thermal stability, the test ring plate 2 has a ring structure design and is laid on the base 1, while also separating the top area of ​​the base 1. The inner ring area of ​​the test ring plate 2 is the test area, ensuring that the clamping test component can test the PCB board within the test area. The positioning plate 5 structure that clamps the test component can move laterally, fixing and clamping the PCB board during the movement to prevent the PCB board from moving during subsequent measurements. One end of the positioning plate 5 is connected to the pointer 10, and the pointer 10 passes through the spacing of the positioning plate 5 and the scale. The height measuring mechanism includes a height measuring plate 14, a height measuring groove 18, a connecting plate 15, and a connecting groove 19. When the height measuring plate 14 moves up and down, it presses against the PCB board, thereby driving the pointer 10 to move through the connecting plate 15. The height of the pointer 10 represents the height (thickness) of the PCB board, thus obtaining the height (thickness) of the PCB board. The scale plate 17 has horizontal and vertical scale lines, representing length and height (thickness) lines, respectively.

[0036] Specifically, the clamping test assembly moves along the length direction between the test ring plates 2. The positioning plate 5 in the clamping test assembly and the pointer 10 set on one side of the positioning plate 5 can measure the length of the PCB board while clamping the PCB board. While the positioning plate 5 clamps the PCB board, the height measuring plate 14 moves above the PCB board. When the height measuring plate 14 moves downward, it presses on the PCB board, thereby driving the pointer 10 to move. The height (thickness) of the PCB board can be obtained through the height of the pointer 10. Thus, the length and height (thickness) of the PCB board can be measured while the positioning plate 5 is clamping the PCB board.

[0037] The connecting groove 19 is located at one end of the positioning plate 5, which is located at the pointer 10. The height measuring groove 18 is located on one side of the positioning plate 5, and the height measuring groove 18 and the connecting groove 19 are connected to form an L-shaped groove. The structure of the height measuring plate 14 and the connecting plate 15 is adapted to the height measuring groove 18 and the connecting groove 19, so that the height measuring plate 14 can drive the pointer 10 to move up and down during the up and down movement.

[0038] Please continue reading. Figures 1-4 One end of the connecting plate 15 is provided with a buffer hole 16. The end of the pointer 10 connected to the connecting plate 15 has a buffer rod that is adapted to the buffer hole 16. The buffer rod is inserted into the interior of the buffer hole 16. One end of the positioning plate 5 is fixedly provided with a stabilizing plate 11 on one side of the pointer 10. A stabilizing groove 12 is provided on one side of the stabilizing plate 11. A stabilizing block 13 is fixedly provided on one side of the pointer 10. The stabilizing block 13 is located inside the stabilizing groove 12. The stabilizing groove 12 includes a vertical groove and a longitudinal groove with a cross-shaped structure. The stabilizing block 13 is located at the junction of the vertical groove and the longitudinal groove.

[0039] like Figures 1-4 As shown, the buffer connection mechanism includes a buffer hole 16 on the connecting plate 15 and a buffer rod on the pointer 10. The buffer rod is inserted into the buffer hole 16, and when the pointer 10 is pushed backward, the pointer 10 will move inside the buffer hole 16 through the buffer rod, ensuring that the pointer 10 will move backward when its movement is blocked, preventing the pointer 10 from breaking. The stabilizing plate 11 has a cross-shaped stabilizing groove 12, and the stabilizing block 13 on the pointer 10 moves inside the stabilizing groove 12, ensuring that the pointer 10 is more stable when it moves, preventing tilting.

[0040] Specifically, a buffer hole 16 is provided at one end of the connecting plate 15. A buffer rod protrudes from the end of the pointer 10 that connects to the connecting plate 15. The buffer rod is inserted into the buffer hole 16. The cooperation between the buffer hole 16 and the buffer rod forms a movable connection structure. The insertion design of the buffer rod and the hole simplifies the assembly process of the pointer 10 and the connecting plate 15, and facilitates disassembly and maintenance. A stabilizing plate 11 is fixed at one end of the positioning plate 5. A stabilizing groove 12 is provided on the stabilizing plate 11. The stabilizing block 13 of the pointer 10 is embedded in the stabilizing groove 12. The constraint effect of the stabilizing groove 12 on the stabilizing block 13 restricts the pointer 10 to move only in a preset direction (such as horizontal or vertical), avoids swaying, ensures that the trajectory of the pointer 10 is parallel to the plane of the scale plate 17, and prevents reading errors caused by tilting. The stabilizing groove 12 is a cross-shaped structure (vertical groove + longitudinal groove), and the vertical groove is... The junction between the directional slot and the longitudinal slot forms an intersection area. The initial position of the stabilizing block 13 is located in the intersection area. The cross-shaped slot allows the stabilizing block 13 to selectively move along the vertical (Z-axis) or longitudinal (X / Y-axis). The specific direction depends on whether the pointer 10 moves up and down or back and forth with the height measuring plate 14. When moving vertically: the height measuring plate 14 is driven to move up and down, that is, the pointer 10 is driven to move up and down through the connecting plate 15. The stabilizing block 13 on the pointer 10 moves along the vertical slot. The rise and fall of the height measuring plate 14 reflects the change in PCB height (thickness). When moving longitudinally: when the pointer 10 is driven to move in contact with the scale plate 17, if a protruding foreign object appears on the scale plate 17, the pointer 10 will be pushed longitudinally, which will cause the stabilizing block 13 on the pointer 10 to move along the longitudinal slot, preventing damage to the pointer 10.

[0041] Please see Figure 3 A miniature telescopic rod is installed on the top of the positioning plate 5 at the position of the connecting plate 15. The output end of the telescopic rod is connected to the connecting plate 15 and is used to move the height measuring plate 14 up and down.

[0042] like Figure 3As shown, the output end of the miniature telescopic rod at the top of the positioning plate 5 is connected to the connecting plate 15. At the same time, the positioning plate 5 has a hole that matches the output end of the miniature telescopic rod, so as to ensure that the miniature telescopic rod drives the connecting plate 15 to move up and down. The miniature telescopic rod includes a cylinder that can drive up and down movement and a telescopic rod connected to the cylinder. When the cylinder drives the telescopic rod to move up and down, it can drive the connecting plate 15 connected to the telescopic rod to move, so that the height measuring plate 14 can measure the PCB board.

[0043] Please see Figure 1 and Figure 2 The test ring plate 2 is provided with a first slot 3 and a second slot 4 at both ends of the positioning plate 5. One end of the positioning plate 5 slides inside the second slot 4, and the other end of the positioning plate 5 is fixed with a connecting plate 6. The connecting plate 6 slides inside the first slot 3 and extends to the outside of the test ring plate 2.

[0044] like Figure 1 and Figure 2 As shown, the test ring plate 2 has a first slot 3 and a second slot 4 located at both ends of the positioning plate 5. One end of the positioning plate 5 slides inside the second slot 4, achieving unidirectional sliding guidance. The other end of the positioning plate 5 is fixed with a connecting plate 6. The connecting plate 6 slides inside the first slot 3 and extends to the outside of the test ring plate 2, forming a drive interface. The double-slot design of the first slot 3 and the second slot 4 provides bidirectional constraint and guidance: the second slot 4 restricts one end of the positioning plate 5 to slide only along the slot direction (such as radially), preventing offset; the first slot 3 allows the connecting plate 6 to drive the other end of the positioning plate 5 to move synchronously, ensuring... The overall linear motion and double slots distribute the force on the positioning plate 5, avoiding deformation caused by stress concentration at a single point. One end of the positioning plate 5 slides inside the second slot 4, providing a passive guiding function: the second slot 4 acts as a driven track, ensuring that the positioning plate 5 moves along a preset path without additional drive. The connecting plate 6 is fixed to the other end of the positioning plate 5 and extends to the outside of the ring plate. The power transmission interface: the connecting plate 6 serves as a connection component with an external drive mechanism (such as a motor 7 or a threaded rod), transmitting power to the positioning plate 5. The stroke extension design, extending to the outside of the ring plate, allows for a larger range of motion and adapts to PCBs of different sizes.

[0045] Please continue reading. Figure 1 and Figure 2 A motor 7 is installed on the base 1. The output end of the motor 7 is connected to a rotating rod 8. A connecting plate 6 is sleeved on the rotating rod 8. Two sets of symmetrical threaded grooves are opened on the outer surface of the rotating rod 8. The number of clamping test components is set to two. Both clamping test components are threadedly connected to the rotating rod 8 and are symmetrically arranged on the rotating rod 8.

[0046] like Figure 1 and Figure 2As shown, a motor 7 is installed on the base 1, and the output end of the motor 7 is connected to a rotating rod 8. A connecting plate 6 is sleeved on the rotating rod 8. The motor 7 converts the rotational motion of the rotating rod 8 into the linear movement of the connecting plate 6, replacing manual adjustment and realizing automatic displacement control of the positioning plate 5. The sleeve design of the rotating rod 8 and the connecting plate 6 ensures that the power transmission is slip-free and avoids the cumulative error of traditional belt / gear transmission. Two sets of symmetrical threaded grooves are opened on the outer surface of the rotating rod 8. Two clamping test components are set, and they are symmetrically threaded onto the rotating rod 8. The symmetrical threaded groove design allows the two clamping test components to move synchronously in opposite directions or in the opposite direction when the rotating rod 8 rotates, realizing bidirectional clamping or center alignment, and adapting to the centering and fixing of PCB boards of different sizes (such as 100mm×100mm to 400mm×400mm board types); avoiding the measurement error of PCB board skew caused by unilateral force application. If it is necessary to release the PCB board, the motor 7 reverses and the components move in the opposite direction to disengage.

[0047] Please continue reading. Figure 1 and Figure 2 The top of the base 1 is equipped with a turntable 9 located at the center of the test area.

[0048] like Figure 1 and Figure 2 As shown, the PCB board is placed on the turntable 9, and a drive motor can be installed at the bottom of the turntable 9. The drive motor drives the turntable 9 to rotate. When the turntable 9 rotates, it will drive the PCB board to rotate, so that the different sides of the PCB board are clamped by the positioning plate 5. That is, when the PCB board is placed horizontally, the positioning plate 5 clamps the PCB board to measure its length, and when the PCB board is placed vertically, the positioning plate 5 clamps the PCB board to measure its width.

[0049] Please continue reading. Figure 1 and Figure 2 The scale plate 17 is made of transparent glass, and its outer surface is provided with fluorescent scale lines. There are multiple sets of fluorescent scale lines, which are opened horizontally or vertically on the scale plate 17, so that the pointer 10 can obtain the length, width, height (thickness) of the PCB board by passing through the scale lines.

[0050] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions 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 this utility model.

Claims

1. An automatic measurement device for PCB expansion and contraction coefficient, characterized in that, include: Base (1); The test ring plate (2) is fixedly mounted on the base (1), and the inner ring area of ​​the test ring plate (2) is the test area; The clamping test assembly includes a positioning plate (5) located inside the test area and a pointer (10) located at one end of the positioning plate (5). A height measuring groove (18) is opened on one side of the positioning plate (5), and a height measuring plate (14) is movable up and down inside it. A connecting groove (19) is opened at one end of the positioning plate (5) located at the pointer (10), and a connecting plate (15) connected to the height measuring plate (14) and the pointer (10) is provided inside it. The height measuring groove (18) and the connecting groove (19) are interconnected and form an L-shaped structure. A scale plate (17) is fixed on the base (1) and located on one side of the test ring plate (2), with one end of the pointer (10) attached to one side of the scale plate (17).

2. The automatic PCB expansion / contraction coefficient measuring device according to claim 1, characterized in that, One end of the connecting plate (15) is provided with a buffer hole (16), and the end of the pointer (10) connected to the connecting plate (15) has a buffer rod that is adapted to the buffer hole (16) and is inserted into the buffer hole (16).

3. The automatic PCB expansion / contraction coefficient measuring device according to claim 1, characterized in that, One end of the positioning plate (5) is fixed with a stabilizing plate (11) on one side of the pointer (10). A stabilizing groove (12) is provided on one side of the stabilizing plate (11). A stabilizing block (13) is fixed on one side of the pointer (10) and the stabilizing block (13) is located inside the stabilizing groove (12).

4. The automatic PCB expansion / contraction coefficient measuring device according to claim 3, characterized in that, The stabilizing groove (12) includes a vertical groove and a longitudinal groove in a cross shape, and the stabilizing block (13) is located at the junction of the vertical groove and the longitudinal groove.

5. The automatic PCB expansion / contraction coefficient measuring device according to claim 1, characterized in that, A miniature telescopic rod is installed on the top of the positioning plate (5) at the position of the connecting plate (15). The output end of the telescopic rod is connected to the connecting plate (15) for the height measuring plate (14) to move up and down.

6. The automatic PCB expansion / contraction coefficient measuring device according to claim 1, characterized in that, The test ring plate (2) is provided with a first slot (3) and a second slot (4) at both ends of the positioning plate (5). One end of the positioning plate (5) slides inside the second slot (4), and the other end of the positioning plate (5) is fixedly provided with a connecting plate (6). The connecting plate (6) slides inside the first slot (3) and extends to the outside of the test ring plate (2).

7. The automatic PCB expansion / contraction coefficient measuring device according to claim 6, characterized in that, A motor (7) is installed on the base (1), and a rotating rod (8) is connected to the output end of the motor (7). The connecting plate (6) is sleeved on the rotating rod (8).

8. The automatic PCB expansion / contraction coefficient measuring device according to claim 7, characterized in that, The outer surface of the rotating rod (8) is provided with two sets of symmetrical threaded grooves. The number of clamping test components is set to two. Both clamping test components are threadedly connected to the rotating rod (8) and are symmetrically arranged on the rotating rod (8).

9. An automatic PCB expansion / contraction coefficient measuring device according to claim 8, characterized in that, The base (1) has a turntable (9) rotating at the center point of the test area.

10. The automatic PCB expansion / contraction coefficient measuring device according to claim 1, characterized in that, The scale plate (17) is made of transparent glass and has fluorescent scale lines on its outer surface.

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