Lamp box device for rapidly detecting surface defects of thin film

Abstract

The utility model relates to the technical field of film detection, in particular to a lamp box device for quickly detecting surface defects of a film, which comprises a base and a lamp box embedded in the base, a cavity is arranged inside the lamp box, an opening communicated with the cavity is arranged at the top of the lamp box, and a through hole matched with the opening is arranged at the top of the base and allows light to pass through; an unwinding mechanism and a flattening mechanism are arranged on the base, and the flattening mechanism is used for flattening a film above the through opening. According to the lamp box device for rapidly detecting the surface defects of the film, by arranging the lamp box, illumination can be provided for detecting the surface defects of the film. By arranging the flattening mechanism, the thin film can be flattened above the opening of the lamp box, so that light rays are in relatively vertical contact with the thin film, defects on the thin film can be better shown, and the detection effect is ensured. Meanwhile, the film does not need to be continuously adjusted, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of film detection, in particular to a light box device for quickly detecting film surface defects. Background Art

[0002] BOPP film is usually several microns to more than ten microns thick. As the dielectric material of film capacitors, it is widely used in new energy vehicles, photovoltaics, wind power, power electronics, household appliances and other fields. In the actual production process of the film, due to the influence of various factors, defects such as holes, crystallization marks, scratches, spots, oil pollution, etc. will appear on the surface of the film, which seriously affects the quality of the film. Therefore, after the film is formed, its surface defects need to be checked.

[0003] The traditional way is to inspect the surface of the film by hand-held lighting equipment, which is inefficient and has poor detection effect. In addition, some technologies use light boxes to detect defects on the surface of the film. For example, the authorization announcement number CN206694941U discloses a portable isolation film appearance detection light box, including a dark box, a light-transmitting plate, a lamp and a dimming switch box. The light box can be used to detect defects on the surface of the isolation film, and has the characteristics of simple principle, convenient design, easy to carry and move, and adjustable brightness; the dimming switch box is set to adjust the brightness of the light source, which can better and more comprehensively observe the information of the isolation film, and the use effect is excellent.

[0004] However, this light box can only provide light to illuminate the film surface. When in use, the staff needs to manually flatten the film at the opening of the light box and manually pull the film. During the operation, the film surface is unevenly stressed and prone to wrinkles, so that the light cannot pass through the film relatively vertically, resulting in poor detection effect. In addition, the film needs to be adjusted manually constantly, making it difficult to improve the detection efficiency. In view of this, we propose a light box device for quickly detecting film surface defects. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a light box device for quickly detecting film surface defects. The light box device for quickly detecting film surface defects solves the current problems of low efficiency and poor detection effect of film surface defects detection.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A light box device for quickly detecting film surface defects comprises a base and a light box embedded in the base, wherein a cavity is provided inside the light box and an opening communicating with the cavity is provided on the top, and a through hole matching with the opening is provided on the top of the base for light to pass through;

[0008] The base is provided with an unwinding mechanism and a flattening mechanism, and the flattening mechanism is used to flatten the film above the through opening.

[0009] Preferably, a scale is fixedly connected to the top of the base, and the inner wall of the light box is black.

[0010] Preferably, the unwinding mechanism comprises a fixing plate fixedly connected to the base, the fixing plate is rotatably connected to an unwinding shaft, the unwinding shaft is detachably connected to two limiting disks, and the limiting disks are used to fix the film roll on the unwinding shaft.

[0011] Preferably, a plurality of limiting holes are provided on the unwinding shaft, and a limiting screw is threadedly connected on the inner wall of the limiting disk, and one end of the limiting screw can be embedded in the limiting hole.

[0012] Preferably, the flattening mechanism includes a fixed rod fixedly connected to the base, a sliding plate slidably connected to the fixed rod, two connecting plates fixedly connected to the sliding plate, each connecting plate is rotatably connected to two limiting rollers, and there is a gap between the two limiting rollers for the film to pass through.

[0013] Preferably, an end plate is fixedly connected to the top end of the fixing rod, and the bottom end of the end plate is connected to the sliding plate via a spring.

[0014] Preferably, a first magnetic block is embedded in the top of the base, and a second magnetic block is embedded in the bottom of the sliding plate, and the second magnetic block has a side opposite to the first magnetic block in terms of magnetism.

[0015] Preferably, it also includes a winding mechanism;

[0016] The winding mechanism comprises a support plate fixedly connected to one side of the base, a motor is mounted on the support plate, and a winding shaft is connected to the output end of the motor.

[0017] Preferably, the motor is electrically connected to a first pole plate and a second pole plate, the first pole plate is fixedly connected to the bottom of the base, the second pole plate is located below the first pole plate, and the top of the second pole plate is fixedly connected to a sliding rod, the top of the sliding rod passes through the first pole plate and the base in sequence and is fixedly connected to the sliding plate.

[0018] Preferably, a groove and a through groove are provided on the base, and the limiting roller can move up and down in the through groove.

[0019] By means of the above technical solution, the utility model provides a light box device for quickly detecting film surface defects. It has at least the following beneficial effects:

[0020] (1) The light box device for quickly detecting film surface defects can provide light to detect film surface defects by setting up a light box. By setting up a flattening mechanism, the film can be flattened above the light box opening, so that the light contacts the film relatively vertically, thereby making the defects on the film more visible, thereby ensuring the detection effect. At the same time, there is no need to constantly adjust the film, thereby improving the detection efficiency.

[0021] (2) The light box device for quickly detecting film surface defects can automatically reel in the film after detection by setting a reeling mechanism, without the need to manually pull and reel in the film, thereby further improving the detection efficiency. The reeling mechanism can be automatically controlled to be on and off by the flattening mechanism, so that the film can remain stationary when it is in contact with the surface of the base, thereby avoiding friction damage between the film and the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the light box in the embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of an unwinding mechanism in an embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of a winding mechanism in an embodiment of the utility model;

[0027] Figure 5 This is a schematic diagram of a flattening mechanism in an embodiment of the utility model;

[0028] Figure 6 It is a cross-sectional view of the base and the sliding plate in the embodiment of the utility model.

[0029] In the figure: 1. base; 11. groove; 12. through groove; 2. unwinding mechanism; 21. fixed plate; 22. unwinding shaft; 221. limiting hole; 23. limiting disk; 24. limiting screw; 3. light box; 4. winding mechanism; 41. support plate; 42. motor; 43. winding shaft; 44. first pole plate; 45. second pole plate; 46. sliding rod; 5. flattening mechanism; 51. fixed rod; 52. end plate; 53. sliding plate; 54. connecting plate; 55. limiting roller; 56. first magnetic block; 57. second magnetic block; 6. scale. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-Figure 6 The utility model provides a light box device for quickly detecting film surface defects, comprising a base 1 and a light box 3 embedded in the base 1, wherein a cavity is provided inside the light box 3, a long strip light tube is installed in the cavity, an opening is provided at the top of the light box 3 to communicate with the cavity, and a through hole is provided at the top of the base 1 to match the opening. Light can pass through the base 1 and irradiate the film above the base 1, so that scratches and defects on the film surface are revealed.

[0032] Furthermore, the inner wall of the cavity is coated with black paint or bonded with a black light-shielding film to reduce light reflection and ensure the observation effect. A scale 6 is fixedly connected to the top of the base 1 to facilitate the user to record the defective position.

[0033] In this embodiment, a reeling mechanism 2 is provided on the base 1 for reeling the film.

[0034] See also Figure 3 The unwinding mechanism 2 includes a fixed plate 21 fixedly connected to the base 1, and an unwinding shaft 22 is rotatably connected to the inner wall of the fixed plate 21 through a bearing. When in use, the film roll can be sleeved on the unwinding shaft 22, and the film roll is driven to rotate by the bearing and the unwinding shaft 22, which can reduce the friction force on the film roll and make the unwinding process smoother. Two limit disks 23 are detachably connected to the unwinding shaft 22, and the limit disks 23 are used to fix the film roll on the unwinding shaft 22.

[0035] Specifically, a plurality of limiting holes 221 are provided on the unwinding shaft 22, and a limiting screw 24 is threadedly connected to the inner wall of the limiting disk 23, and one end of the limiting screw 24 can be embedded in the limiting hole 221, thereby limiting the relative rotation between the limiting disk 23 and the unwinding shaft 22. The film roll can be clamped and fixed on the unwinding shaft 22 through the two limiting disks 23, so that the film roll can rotate with the unwinding shaft 22 to achieve unwinding.

[0036] As one embodiment, a flattening mechanism 5 is provided on the base 1, and the flattening mechanism 5 is used to flatten the film above the through opening, so that the plane to be inspected of the film is parallel to the top of the light box 3, and the film fits with the top surface of the base 1, thereby improving the effect of defect inspection.

[0037] Combination Figure 5 and Figure 6As shown, the flattening mechanism 5 includes a fixed rod 51 fixedly connected to the base 1. The number of the fixed rods 51 is four, which are divided into two groups. The two groups of fixed rods 51 are symmetrically distributed with the center line of the light box 3 as the symmetry axis. A sliding plate 53 is slidably connected to each group of fixed rods 51, and two connecting plates 54 are fixedly connected on opposite sides of the two sliding plates 53. The four connecting plates 54 are divided into two groups. A group of limiting rollers 55 are rotatably connected between each group of connecting plates 54. The number of each group of limiting rollers 55 is two, and there is a gap between the two limiting rollers 55 for the film to pass through. The two groups of limiting rollers 55 are on the same horizontal plane, so that the film passing through them is in a horizontal state. A through groove 12 is opened on the base 1, and the limiting roller 55 can move up and down in the through groove 12.

[0038] Furthermore, the top of the fixed rod 51 is fixedly connected with an end plate 52, and the bottom of the end plate 52 is connected to the sliding plate 53 through a spring. A first magnetic block 56 is embedded in the top of the base 1, and a second magnetic block 57 is embedded in the bottom of the sliding plate 53. The second magnetic block 57 has opposite magnetism to the side opposite to the first magnetic block 56. The magnetic force between the first magnetic block 56 and the second magnetic block 57 is greater than the elastic force of the spring. When the first magnetic block 56 and the second magnetic block 57 are attracted to each other, the spring is in a stretched state. At this time, the film between the limiting rollers 55 can be flat on the base 1, so that the user can clearly observe the defect.

[0039] In addition, a groove 11 is provided on the base 1, which is convenient for the user to pull the sliding plate 53 upward, thereby allowing the second magnetic block 57 to separate from the first magnetic block 56. When the second magnetic block 57 is pulled away from the first magnetic block 56 by a certain distance, the elastic force of the spring can overcome the attraction between the magnetic blocks. At this time, the sliding plate 53 can move upward under the elastic force and drive the four limiting rollers 55 to move upward, so that a certain distance is maintained between the film and the base 1. At this time, when the film is pulled, no friction is generated between the film and the top surface of the base 1, thereby avoiding wear on the film.

[0040] As an embodiment, a winding mechanism 4 is further included, and the winding mechanism 4 is used to automatically wind up the film after inspection.

[0041] See also Figure 4 The winding mechanism 4 includes a support plate 41 fixedly connected to one side of the base 1, a motor 42 is fixedly mounted on the support plate 41, and a winding shaft 43 is fixedly connected to the output end of the motor 42. When in use, the winding drum is fixed to the winding shaft 43 through the limit plate 23 and other structures, and then one end of the film is fixed to the winding drum, and the winding shaft 43 is driven to rotate by the motor 42 to achieve winding of the film.

[0042] As an embodiment, the positive and negative poles of the motor 42 are electrically connected to the first pole plate 44 and the second pole plate 45, respectively. Here, the first pole plate 44 and the second pole plate 45 act as circuit switches. When the first pole plate 44 and the second pole plate 45 are in contact, the circuit of the motor 42 is closed, and the motor 42 automatically starts to achieve winding. The motor 42 is a reduction motor, which can avoid the winding speed being too fast and affecting the effect of defect inspection. The first pole plate 44 is fixedly connected to the bottom of the base 1, the second pole plate 45 is located below the first pole plate 44, and the top of the second pole plate 45 is fixedly connected to the slide bar 46, and the top of the slide bar 46 passes through the first pole plate 44 and the base 1 in sequence and is fixedly connected to the slide plate 53. When the slide plate 53 moves, the slide bar 46 can drive the second pole plate 45 to move relative to the first pole plate 44, thereby automatically controlling the on and off of the circuit.

[0043] When the utility model of the light box device for quickly detecting surface defects of a film is used, the film roll with inspection is first set on the unwinding shaft 22, and the film roll is fixed on the unwinding shaft 22 by the limit plate 23, and the winding drum is fixed on the winding shaft 43. Then one end of the film is pulled so that the film passes through the two sets of limit rollers 55 in sequence, and the end of the film is fixed on the winding drum on the winding shaft 43. Then the light source in the light box 3 is turned on, and the motor 42 is started. The output end of the motor 42 drives the winding shaft 43 to rotate, and then drives the winding drum to wind up one end of the film. When the film passes over the light box 3, the defects on it will appear under the irradiation of light, and the user can judge whether it is a qualified product by observing the surface defects of the film. In this process, the user can record the defective parts through the scale 6 to facilitate subsequent processing. When there are defects that are difficult to judge, or major defects, the user can press the sliding plate 53 downward, and the sliding plate 53 drives the four limiting rollers 55 to move downward through the connecting plate 54, thereby pressing the film downward so that the bottom surface of the film fits with the top of the base 1. At this time, the second magnetic block 57 at the bottom of the sliding plate 53 will contact the first magnetic block 56 at the top of the base 1, and the sliding plate 53 will be adsorbed on the base 1. In addition, when the sliding plate 53 moves downward, it will synchronously drive the second pole plate 45 to move downward through the sliding rod 46, so that the second pole plate 45 is separated from the first pole plate 44, the circuit is disconnected, and the motor 42 stops running, so that the film is in a static state. At this time, it is convenient for users to focus on the defects on the film or perform shearing and other treatments on major defects.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A light box device for quickly detecting film surface defects, comprising a base (1) and a light box (3) embedded in the base (1), characterized in that: The light box (3) is provided with a cavity inside, and an opening communicating with the cavity is provided at the top, and a through hole matching the opening is provided at the top of the base (1) for light to pass through; The base (1) is provided with an unwinding mechanism (2) and a flattening mechanism (5), and the flattening mechanism (5) is used to flatten the film above the opening.

2. The light box device for rapid detection of film surface defects according to claim 1 is characterized in that: A scale (6) is fixedly connected to the top of the base (1), and the inner wall of the light box (3) is black.

3. The light box device for rapid detection of film surface defects according to claim 1, characterized in that: The unwinding mechanism (2) comprises a fixed plate (21) fixedly connected to the base (1), an unwinding shaft (22) being rotatably connected to the fixed plate (21), two limit plates (23) being detachably connected to the unwinding shaft (22), and the limit plates (23) being used to fix the film roll on the unwinding shaft (22).

4. The light box device for rapid detection of film surface defects according to claim 3 is characterized in that: The unwinding shaft (22) is provided with a plurality of limiting holes (221), and the inner wall of the limiting plate (23) is threadedly connected with a limiting screw (24), and one end of the limiting screw (24) can be embedded in the limiting hole (221).

5. The light box device for rapid detection of film surface defects according to claim 1, characterized in that: The flattening mechanism (5) comprises a fixed rod (51) fixedly connected to the base (1), a sliding plate (53) slidably connected to the fixed rod (51), two connecting plates (54) fixedly connected to the sliding plate (53), each connecting plate (54) rotatably connected to two limiting rollers (55), and a gap is provided between the two limiting rollers (55) for the film to pass through.

6. The light box device for rapid detection of film surface defects according to claim 5, characterized in that: The top end of the fixed rod (51) is fixedly connected to an end plate (52), and the bottom end of the end plate (52) is connected to a sliding plate (53) via a spring.

7. The light box device for rapid detection of film surface defects according to claim 5, characterized in that: A first magnetic block (56) is embedded in the top of the base (1), and a second magnetic block (57) is embedded in the bottom of the sliding plate (53); the second magnetic block (57) has opposite magnetism to the first magnetic block (56) on one side.

8. The light box device for rapid detection of film surface defects according to claim 5, characterized in that: It also includes a winding mechanism (4); The winding mechanism (4) comprises a support plate (41) fixedly connected to one side of the base (1), a motor (42) being mounted on the support plate (41), and an output end of the motor (42) being connected to a winding shaft (43).

9. The light box device for rapid detection of film surface defects according to claim 8, characterized in that: The motor (42) is electrically connected to a first pole plate (44) and a second pole plate (45); the first pole plate (44) is fixedly connected to the bottom of the base (1); the second pole plate (45) is located below the first pole plate (44); and a slide bar (46) is fixedly connected to the top of the second pole plate (45); the top end of the slide bar (46) passes through the first pole plate (44) and the base (1) in sequence and is fixedly connected to the slide plate (53).

10. The light box device for rapid detection of film surface defects according to claim 5, characterized in that: The base (1) is provided with a groove (11) and a through groove (12), and the limiting roller (55) can move up and down in the through groove (12).

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