Flatness detection device

Abstract

This utility model relates to the field of testing equipment and discloses a flatness testing device, including an electrical control box, a fixture mounted on the electrical control box, a support part mounted on the fixture for supporting a product, a positioning structure mounted on the fixture for positioning the product, and a flatness testing part mounted on the fixture corresponding to the point to be tested on the product. This utility model uses the support part to support the product and simultaneously serve as a reference surface for flatness testing, ensuring the accuracy of the test results. The positioning structure positions the product on the support part, ensuring precise positioning of the product and guaranteeing the accuracy of the flatness testing results, thus avoiding unnecessary problems caused by product movement.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment, and in particular to a flatness testing device. Background Technology

[0002] Metal components play a crucial role in electronic products. They provide structural support, efficient heat dissipation, and electromagnetic shielding, while also giving the product a robust feel and a premium appearance. Take smartphones as an example: their metal frames are typically made of high-strength aluminum alloy, stainless steel, or titanium alloy, precision-machined and nestled between the screen and back cover, forming the core skeleton of the entire device. They not only effectively protect internal precision components from impacts and deformation but also quickly dissipate heat generated by the processor. Furthermore, metal materials help optimize antenna signals, enhance grip stability, and contribute to a sleek industrial aesthetic, making them indispensable key components for achieving thinness, high performance, and durability in electronic products.

[0003] To ensure the assembly precision, functional reliability, and aesthetic quality of electronic products, the flatness inspection of metal components is crucial. For example, the mid-frame of a mobile phone serves as the structural foundation connecting the screen, back cover, and internal components. If its flatness is substandard (indicating warping or localized dents), it can lead to gaps during screen or back cover assembly, uneven stress, or even breakage, affecting waterproofing and sealing. Furthermore, uneven contact surfaces weaken the heat dissipation efficiency of the heat dissipation module and may interfere with antenna signal transmission and reception. Moreover, the subtle deformation caused by unevenness in metal components can detract from the product's premium feel both visually and tactilely. Therefore, rigorous flatness inspection is a key quality control step to ensure the durability, functional integrity, and user experience of a mobile phone.

[0004] Current methods for flatness inspection of metal parts utilize laser inspection equipment. The product is placed flat on the inspection fixture, and a reference surface and laser inspection points are established to complete the coordinate measurement. This inspection method is not only inefficient but also cannot export accurate data for each measurement point. Utility Model Content

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a flatness detection device to solve the problem of low efficiency of the existing flatness detection method.

[0006] To solve the above-mentioned technical problems, the present invention provides a flatness detection device comprising an electrical control box, a fixture mounted on the electrical control box, a support part mounted on the fixture for carrying the product, a positioning structure mounted on the fixture for positioning the product, and a flatness detection part mounted on the fixture corresponding to the point to be detected on the product.

[0007] Furthermore, the bearing portion is configured as a boss protruding from the fixture or a ridge corresponding one-to-one with the positions of each side wall of the product, and the protruding surface of the boss or ridge is configured as a horizontal reference surface; each side wall of the product is placed on the horizontal reference surface.

[0008] Furthermore, the positioning structure includes a plurality of positioning parts disposed on the fixture and distributed corresponding to each side wall of the product, wherein the positioning parts form a positioning surface for positioning the product facing the inner side of the product.

[0009] Furthermore, the positioning part also has a guide slope connected to the positioning surface, the guide slope being inclined upwards and outwards from the positioning surface.

[0010] Furthermore, the product has multiple test points; a clearance groove is provided on the support part corresponding to the position of each test point, and the clearance groove passes through the platform of the support part; the flatness detection part is disposed in the clearance groove.

[0011] Furthermore, the product has multiple protruding sidewalls, and at least one test point is provided on each sidewall; the flatness detection unit is used to detect the flatness of the sidewalls of the product.

[0012] Furthermore, the flatness detection unit is configured as a non-contact flatness detection unit, and the non-contact flatness detection unit is electrically connected to the electrical control box.

[0013] Furthermore, the non-contact flatness detection unit includes a base installed in the clearance groove, a first protrusion disposed on the base and located on the inner side of the corresponding side wall, a second protrusion disposed on the base and located on the outer side of the corresponding side wall, and sensors disposed on the opposing sides of the first and second protrusions respectively to detect the flatness of the product side wall.

[0014] Furthermore, the first protrusion is arranged flush with the supporting portion.

[0015] Furthermore, the support portion is configured as a frame-shaped protrusion that corresponds one-to-one with each side wall position of the product. A photoelectric switch electrically connected to each flatness detection portion is provided on the inner side of the protrusion. The photoelectric switch has a trigger surface that causes each flatness detection portion to operate when the product contacts the support portion.

[0016] The flatness testing device of this utility model has at least the following beneficial effects: By setting up a support part to support the product and at the same time serving as a reference surface for flatness testing, the accuracy of the test results is ensured; the positioning structure is used to position the product on the support part, ensuring that the product's position is accurately positioned, ensuring the accuracy of the flatness testing results of the flatness testing part, and avoiding unnecessary trouble caused by product movement. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of one of the products adapted to this utility model;

[0019] Figure 2 A top view of the internal structure of one of the products adapted to this utility model;

[0020] Figure 3 This is a schematic diagram of the flatness detection device of this utility model;

[0021] Figure 4 This is a schematic diagram of the flatness detection device (hidden electrical control box) of this utility model;

[0022] Figure 5 for Figure 4 An enlarged view of part B shown;

[0023] Figure 6 This is a top view of the flatness detection device (hidden electrical control box) of this utility model;

[0024] Figure 7 This is a front sectional view of the present invention cut along the CC direction;

[0025] Figure 8 for Figure 7 An enlarged view of part D shown.

[0026] The meanings of the labels in the attached diagram are as follows:

[0027] Product 1, Metal frame structure 11, Surface structure 12, Side wall 13, Electrical control box 2, Housing 21, Human-machine interface 22, Control button 23, Workbench 24, Fixture 3, Material picking groove 31, Mounting groove 32, Bearing part 4, Protrusion 4a, Clearance groove 41, Horizontal reference surface 42, Positioning structure 5, Bottom block 51, Positioning block 52, Positioning surface 53, Placement space 54, Guide slope 55, Flatness detection part 6, Base 61, First protrusion 62, Second protrusion 63, Sensor 64, Detection channel 65, Photoelectric switch 7, Trigger surface 71. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Please see Figure 1 and Figure 2Product 1, which is one of the products adapted to this utility model, is a mobile phone mid-frame structure, including a metal frame structure 11 and a surface structure 12 wrapped around the surface of the metal frame structure. The surface structure 12 has sidewalls 13, also known as protruding edges, protruding along the thickness direction on each side edge of its thickness side. Flatness detection points are distributed on each sidewall 13, and each sidewall 13 has at least one detection point. Please continue reading. Figure 2 For example, a reference plane is established on the side of the sidewall 13 away from the middle frame at four positions: A1, A2, A3, and A4. Eight points from Z1 to Z8 are selected as test points. The distance between the corresponding metal frame structure 11 and the reference plane at the eight test points is measured, and the deformation of the two sides of the metal frame structure 11 corresponding to the test points is ≤0.25mm. Among them, the test points Z1, Z3, Z5, and Z7 correspond to the four corners with clearance, etc. Finally, the flatness is judged by whether the measured values ​​are within the allowable deformation or tolerance range.

[0030] Please see Figures 3 to 8 The flatness testing device of this utility model includes an electrical control box 2, a fixture 3 mounted on the electrical control box 2, a support part 4 mounted on the fixture 3 for supporting the product 1, a positioning structure 5 mounted on the fixture 3 for positioning the product 1, and a flatness testing part 6 mounted on the fixture 3 corresponding to the test point of the product 1. The electrical control box 2 and the flatness testing part 6 are electrically connected so that the electrical control box 2 controls the opening and closing of the flatness testing part, ensuring the flatness testing and the output and display of the test results. The fixture 3 supports the support part 4, the positioning structure 5, and the flatness testing part 6. The support part 4 supports each side of the product 1 and forms a reference surface. When the product 1 is installed on the support part 4, each side wall 13 contacts the reference surface on the support part 4. The flatness testing part 6 uses the reference surface as a reference position to test the flatness of the metal frame structure 11 inside the side wall 13 of the product 1 and outputs the result to the electrical control box 2. The electrical control box 2 displays the test structure, thereby judging the quality of the product 1.

[0031] In this embodiment, the electrical control box 2 includes a housing 21, a controller (not shown in the figure) installed inside the housing 21, and a human-machine interface 22 installed on the outer wall of the housing 21 and electrically connected to the controller. The human-machine interface 22 is located on one side wall 13 of the housing 21, and a control button 23 is provided on this side wall 13 for opening and closing the entire electrical control box 2. A horizontally distributed workbench 24 is located on the top of the housing 21.

[0032] In this embodiment, the fixture 3 is fixedly mounted on the workbench 24 and has an overall cuboid structure, but is not limited to this structure. A material picking groove 31 is recessed on the top surface of the fixture 3, and the material picking groove 31 extends to the outside of the support part 4, so that the product 1 can be taken out by extending into the material picking groove 31 when it is necessary to take out the product 1. The support part 4 is formed on the top surface of the fixture 3 and protrudes upward from the top surface of the fixture 3. In one embodiment, the support part 4 is configured as a boss protruding from the top surface of the fixture 3 to form a complete cuboid structure. In another embodiment, the support part 4 is configured as a protrusion 4a corresponding to the positions of the four side walls 13 of the product 1. The shape and size of the protrusion 4a are basically the same as the shape and size of the four side walls 13 of the product 1, except that, in order to facilitate the support of each side wall 13 of the product 1, the width of the protrusion 4a is wider than the width of the side wall 13 of the product 1. Regardless of whether it is a boss or a rib 4a, its protruding surface, i.e. the top surface of the boss or rib 4a, is configured as a horizontal reference surface 42. The horizontal reference surface 42 is adapted to each side wall 13 of the product 1 so that each side wall 13 of the product 1 can be placed on the horizontal reference surface 42. To facilitate flatness testing and make the flatness testing unit 6 more accurate, a clearance groove 41 is provided on the bearing part 4 at the position corresponding to each test point and the selected reference point (the position of A1 to A4). The clearance groove 41 is opened according to the direction of the beam that needs to be tested at the corresponding point. For the boss, the clearance groove 41 is just a groove that faces upward and opens outward. For the rib 4a, the clearance groove 41 is a groove that runs through both sides of the boss and upward through the rib 4a along the direction of the beam at the test point, so that the rib 4a is completely cut off. The rib 4a runs upward through the platform of the bearing part 4, so that the flatness testing unit 6 is set in the clearance groove 41 and can perform flatness testing from the inside of each side wall 13 of the product 1. The beams are formed from both sides of the side wall 13 to facilitate the accuracy of the test structure.

[0033] In this embodiment, the positioning structure 5 includes a plurality of positioning parts disposed on the top surface of the fixture 3 and distributed corresponding to each side wall 13 of the product 1. Each positioning part includes a bottom block 51 bolted to the top surface of the fixture 3 and a positioning block 52 connected to the bottom block 51. The positioning block 52 protrudes inward in the horizontal direction relative to the bottom block 51, and the height of the bottom surface of the positioning block 52 is higher than the height of the horizontal reference plane 42 and spaced apart from the horizontal reference plane 42, but the distance between the bottom surface of the positioning block 52 and the horizontal reference plane 42 is less than the thickness of the product 1. The inwardly protruding side of the positioning block 52 protrudes directly above the horizontal reference plane 42, and a positioning surface 53 for positioning the product 1 is formed on the inner side of the positioning block 52 facing the product 1. The positioning surface 53 is located in a vertical plane and is arranged directly opposite the horizontal reference plane 42. A placement space 54 is formed between the positioning surface 53 and the horizontal reference plane 42 for placing the product 1 in the vertical direction. To further facilitate the rapid positioning and installation of product 1, the positioning part also has a guide slope 55 connected to the positioning surface 53. The guide slope 55 is inclined upward and outward from the positioning surface 53 so that even if product 1 is misaligned during placement, it can eventually enter the placement space 54 under the guidance of the guide slope 55.

[0034] In this embodiment, the flatness detection unit 6 is configured as a non-contact flatness detection unit, which is electrically connected to the electrical control box 2. The non-contact flatness detection unit includes a base 61 installed in the clearance groove, a first protrusion 62 disposed on the base 61 and located inside the corresponding side wall 13, a second protrusion 63 disposed on the base 61 and located outside the corresponding side wall 13, and sensors 64 disposed on the opposing sides of the first protrusion 62 and the second protrusion 63 respectively to detect the flatness of the side wall 13 of the product 1. The sensors 64 are electrically connected to the controller of the electrical control box 2. The base 61 has a certain thickness. In order to fix the base 61, a mounting groove 32 is provided on the top surface of the fixture 3 at the position corresponding to the clearance groove 41. Each base 61 is fixedly embedded in the mounting groove 32, and one end of the base 61 passes through the clearance groove 41. The first protrusion 62 and the second protrusion 63 are symmetrically distributed, and the distance between the first protrusion 62 and the second protrusion 63 is greater than the width of the sidewall 13 of the product 1. The distance between the two sensors 64 on the first protrusion 62 and the second protrusion 63 is also greater than the thickness of the sidewall 13. A detection channel 65 is provided between the two sensors 64, allowing the sidewall 13 of the product 1 to pass through without contacting each other, thus enabling non-contact detection. In another embodiment, the first protrusion 62 is flush with the supporting part 4. After the product 1 is installed, each sidewall 13 is supported on the horizontal reference plane 42 and located within the detection channel 65 at the corresponding detection point. Each sensor 64 is an infrared sensor 64. When flatness needs to be detected, infrared radiation is emitted between the two sensors 64. The infrared radiation signal inside the detection point is captured and received through infrared radiation beams, and after signal conversion, the flatness is determined by calculating the radiation reflection angle or the change in the position of the light spot on the target surface. This ensures flatness detection without damaging the surface of the product 1.

[0035] In another embodiment of this utility model, the support part 4 is configured as a frame-shaped protrusion 4a corresponding one-to-one with the four side walls 13 of the product 1. The protrusion 4a has an overall rectangular structure with both the inner and outer sides facing upwards. On the inner side of the protrusion 4a and on the top surface of the outer shell 21 of the electrical control box 2, there is a photoelectric switch 7 that is electrically connected to each flatness detection part 6. The photoelectric switch 7 is electrically connected to the controller. The photoelectric switch 7 has a trigger surface 71 that protrudes relative to the top surface of the fixture 3. When the product 1 is installed in place, the infrared light emitted by the photoelectric switch 7 is reflected by the bottom wall of the product 1 and triggered, thereby sending a signal to the controller to start each flatness detection part 6 to detect flatness, thereby realizing fully automatic flatness detection and effectively improving detection efficiency.

[0036] The working method of one embodiment of the flatness detection device of this utility model is as follows: The control box 2 is started by controlling button 23. First, one side wall 13 of the product 1 to be tested is placed facing the fixture 3, and then the product 1 is moved towards the fixture 3. The product 1 is quickly moved to the horizontal reference surface 42 by the guide ramp 55. The product 1 is restricted and blocked by the positioning surface 53 and cannot move. At this time, each side wall 13 of the product 1 is supported on the horizontal reference surface 42 and extends into the detection channel 65. After the contact surface of the photoelectric switch 7 receives the infrared reflection from the bottom wall of the product 1, each flatness detection part 6 is activated. The two sensors 64 on the first protrusion 62 and the second protrusion 63 emit infrared beams and detect the flatness of the metal frame structure 11 and the distance between it and the horizontal reference surface 42 through the surface structure 12. The detection results are sent to the control box 2 for processing and then displayed through the human-machine interface 22, thus completing the flatness detection of the product 1.

[0037] Compared with the prior art, the flatness detection device of this utility model can achieve non-contact flatness detection, reduce the impact on the flatness of product 1, improve the accuracy of the detection structure of product 1 and the yield of product 1; it can realize fully automatic triggering and detection, improve detection efficiency, and save time and costs; it is easy to introduce automated robotic arms to achieve full automation, reduce manpower and lower costs, improve the yield and efficiency of product 1, increase the line utilization rate, and improve measurement accuracy through two-way beam detection of product 1.

Claims

1. A flatness detection device characterized by: It includes an electrical control box, a fixture mounted on the electrical control box, a support part mounted on the fixture for carrying the product, a positioning structure mounted on the fixture for positioning the product, and a flatness detection part mounted on the fixture corresponding to the point to be tested on the product.

2. The flatness detection device of claim 1, wherein: The bearing portion is configured as a boss protruding from the fixture or a ridge corresponding one-to-one with the positions of each side wall of the product, and the protruding surface of the boss or ridge is configured as a horizontal reference surface; each side wall of the product is placed on the horizontal reference surface.

3. The flatness detection device of claim 1, wherein: The positioning structure includes multiple positioning parts disposed on the fixture and distributed corresponding to each side wall of the product, wherein the positioning parts form a positioning surface for positioning the product facing the inner side of the product.

4. The flatness detection device of claim 3, wherein: The positioning part also has a guide slope connected to the positioning surface, the guide slope being inclined upwards and outwards from the positioning surface.

5. The flatness detection device of claim 1, wherein: The product has multiple test points; a clearance groove is provided on the support part corresponding to the position of each test point, and the clearance groove passes through the platform of the support part; the flatness detection part is disposed in the clearance groove.

6. The flatness detection device as described in claim 2, characterized in that: The product has multiple protruding sidewalls, and at least one test point is provided on each sidewall; the flatness detection unit is used to detect the flatness of the sidewalls of the product.

7. The flatness detection device of claim 5, wherein: The flatness detection unit is configured as a non-contact flatness detection unit, and the non-contact flatness detection unit is electrically connected to the electrical control box.

8. The flatness detection device of claim 7, wherein: The non-contact flatness detection unit includes a base installed in the clearance groove, a first protrusion disposed on the base and located on the inner side of the corresponding side wall, a second protrusion disposed on the base and located on the outer side of the corresponding side wall, and sensors disposed on the opposing sides of the first and second protrusions respectively to detect the flatness of the product side wall.

9. The flatness detection device of claim 8, wherein: The first protrusion is flush with the supporting part.

10. The flatness detection device of claim 2, wherein: The support portion is configured as a frame-shaped protrusion that corresponds one-to-one with the position of each side wall of the product. A photoelectric switch electrically connected to each flatness detection portion is provided on the inner side of the protrusion. The photoelectric switch has a trigger surface that causes each flatness detection portion to operate when the product contacts the support portion.

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