Lamp box and visual inspection device
By introducing a diffuse reflection zone into the lightbox to reflect the strip light source, the problem of difficulty in detecting fine scratches caused by the uniform direction of the light spot is solved, and higher detection accuracy is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG AOPUTE TECH CO LTD
- Filing Date
- 2025-03-31
- Publication Date
- 2026-05-05
AI Technical Summary
The light spot of existing strip light sources has a relatively uniform emission direction, which makes it difficult for some small scratches on the workpiece surface to be detected by the camera, especially small scratches that are parallel or perpendicular to the direction of light spot extension.
Design a lightbox comprising a box body and a strip light source assembly. Utilize the diffuse reflection area to reflect light, thereby diffusing the light spot, increasing the diversity of illumination angles and directions, and improving detection performance.
By designing a diffuse reflection zone, the light spot diffuses on the workpiece surface, improving the camera's accuracy in detecting fine scratches and ensuring that both parallel and perpendicular fine scratches are clearly displayed in the image.
Smart Images
Figure CN224203000U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of light source structure technology, and in particular to a light box and a visual inspection device. Background Technology
[0002] In surface defect visual inspection equipment, the light source is one of the important components, and the quality of the light source will directly affect the visual inspection efficiency and accuracy.
[0003] Current bar light sources can directly project a bar-shaped light spot onto the workpiece surface, making surface defects easier for the inspection camera to capture. However, the light emitted from the bar-shaped light spot forms a spot directly on the workpiece, and the light output direction is relatively uniform. This may make it difficult for the camera to detect some small scratches on the workpiece surface, such as small scratches parallel to or perpendicular to the direction of the light spot.
[0004] In view of this, it is necessary to design a lightbox and a visual inspection device to at least partially solve the above problems.
[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content
[0006] This invention provides a lightbox and a visual inspection device, which can help cameras better detect small scratches.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A lightbox, comprising:
[0009] The enclosure has a light outlet at the bottom and a top plate facing the light outlet. The bottom surface of the top plate has a diffuse reflection area.
[0010] A strip light source assembly is installed in the housing, and the light emitted by the strip light source assembly can be reflected by the diffuse reflection area and then emitted from the light outlet.
[0011] Optionally, the top plate has a through detection hole;
[0012] The strip light source assembly includes at least two first strip light sources, with one first strip light source disposed on each of the opposite sides of the detection hole.
[0013] Optionally, the strip light source assembly includes two second strip light sources, with one second strip light source provided on each of the opposite sides of the detection hole;
[0014] The two first strip light sources and the two second strip light sources are connected end to end to form a rectangular structure, and the rectangular structure surrounds the center line of the detection hole.
[0015] Optionally, the housing includes a side panel, on which a U-shaped mounting groove is provided, and the U-shaped mounting groove penetrates through the side panel, and the opening of the U-shaped mounting groove extends to the bottom edge of the side panel to form a U-shaped notch;
[0016] The strip light source assembly is provided with a first nut fixing groove, and the fastening screw can extend into the mounting U-shaped groove and be threadedly connected to the nut in the first nut fixing groove.
[0017] Optionally, the strip light source assembly has a heat dissipation fin portion, which forms the first nut fixing groove corresponding to the mounting U-shaped groove.
[0018] Optionally, a first nut fixing groove is provided on each of the opposite sides of the heat dissipation fin portion, and a second nut fixing groove is provided at each of the opposite ends of the heat dissipation fin portion.
[0019] Optionally, the diffuse reflection area is provided with a white paint reflective layer.
[0020] Optionally, the housing includes four side panels, the inner surfaces of which near the strip light source assembly are covered with a white paint reflective layer.
[0021] Optionally, the diffuse reflection area covers the bottom surface of the top plate.
[0022] A visual inspection device includes a camera and a lightbox as described in any of the preceding claims.
[0023] Compared with the prior art, the present invention has the following beneficial effects:
[0024] The light box and visual inspection device provided by this utility model have a light source component that emits light through a strip light source component. After being reflected by the diffuse reflection area, the light is emitted from the light outlet and illuminates the surface of the workpiece. The light spot is further diffused after being reflected by the diffuse reflection area, making the direction and angle of the light illuminating the workpiece surface more diverse. This helps to make some small scratches more clearly displayed in the camera image and improve the camera's inspection accuracy.
[0025] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description
[0026] 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.
[0027] Figure 1 This is an exploded view of the light box provided in this embodiment of the utility model;
[0028] Figure 2 yes Figure 1 An enlarged view of the central lightbox at position A;
[0029] Figure 3 This is a front view schematic diagram of the light box provided in this embodiment of the utility model;
[0030] Figure 4 yes Figure 3 A schematic diagram of the AA cross-sectional structure of the central light box.
[0031] Reference numerals: 1. Housing; 101. Light outlet; 11. Top plate; 111. Detection hole; 12. Side plate; 121. Mounting U-shaped groove; 2. Strip light source assembly; 201. First nut fixing groove; 202. Second nut fixing groove; 21. First strip light source; 22. Second strip light source; 3. Fastening screw; 4. Camera. Detailed Implementation
[0032] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.
[0033] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.
[0034] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.
[0035] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.
[0036] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.
[0037] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed or inherent to such process, method, or product.
[0038] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.
[0039] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0040] Unless otherwise clearly specified or defined, in the description of the embodiments of the present application, terms such as "installed", "connected", "linked", "fixed", "set", etc. shall be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integral setting; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium; it may be the communication inside two components or the interaction relationship between two components. For those skilled in the art to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.
[0041] Embodiment 1
[0042] In view of the defects of the existing bar light sources as described above, based on the rich practical experience and professional knowledge in the design and manufacture of such products for many years by the applicant, and in cooperation with the application of theory, the applicant actively conducts research and innovation, hoping to create a product that can solve the defects in the prior art and make the light box more practical. After continuous research, design, and repeated sample making and improvement, the applicant finally created the present utility model with practical value.
[0043] Please refer to Figures 1 to 4 , the embodiment of the present utility model provides a light box, which includes a box body 1 and a bar light source assembly 2.
[0044] A light outlet 101 is formed at the bottom of the box body 1. The light outlet 101 is used for the light to emit, and the box body 1 is provided with a top plate 11 facing the light outlet 101. A diffuse reflection area is provided on the bottom surface of the top plate 11, and the diffuse reflection area can reflect the light emitted by the bar light source assembly 2.
[0045] The bar light source assembly 2 is installed in the box body 1, and the light emitted by the bar light source assembly 2 can be reflected by the diffuse reflection area and then emitted from the light outlet 101.
[0046] In this embodiment, the light emitted by the bar light source assembly 2 is reflected by the diffuse reflection area and then emitted from the light outlet 101, and irradiates on the surface of the workpiece; the light spot is further diffused after being reflected by the diffuse reflection area, making the irradiation direction and irradiation angle of the light irradiating on the surface of the workpiece more diverse, so as to be conducive to making some fine scratches more clearly displayed in the image of the camera, thereby improving the detection accuracy of the camera.
[0047] Among them, the diffuse reflection area is in the shape of a "hui" character or a circular ring.
[0048] Optionally, the top plate 11 has a through-hole detection hole 111; the strip light source assembly 2 includes at least two first strip light sources 21, with one first strip light source 21 disposed on each side of the detection hole 111. The camera 4 can take pictures of the workpiece through the detection hole 111. In addition, the two first strip light sources 21 are disposed on opposite sides of the detection hole 111, and the light emitted by the first strip light sources 21 can be reflected by the diffuse reflection area and then directed towards the workpiece from the light outlet 101, further improving the illumination angle of the light directed towards the workpiece, so that some small scratches parallel to the extension direction of the light spot and some small scratches perpendicular to the extension direction of the light spot can be revealed under the illumination.
[0049] Optionally, the strip light source assembly 2 also includes two second strip light sources 22, with one second strip light source 22 disposed on each opposite side of the detection hole 111; the two first strip light sources 21 and the two second strip light sources 22 are connected end to end to form a rectangular structure, and the rectangular structure surrounds the center line of the detection hole 111. Specifically, the cooperation of the first strip light sources 21 and the second strip light sources 22 is equivalent to forming a ring-shaped light-emitting structure, which enables the illumination angle of the light rays incident on the workpiece to be larger.
[0050] Optionally, the housing 1 includes a side plate 12, on which a U-shaped mounting groove 121 is provided, and the U-shaped mounting groove 121 penetrates through the side plate 12, and the opening of the U-shaped mounting groove 121 extends to the bottom edge of the side plate 12 to form a U-shaped notch; the strip light source assembly 2 is provided with a first nut fixing groove 201, and the fastening screw 3 can extend into the U-shaped mounting groove 121 and be threadedly connected to the nut in the first nut fixing groove 201.
[0051] In this embodiment, after loosening all the fastening screws 3, the fastening screws 3 and the strip light source assembly 2 can be removed as a whole, making the disassembly and assembly of the strip light source assembly 2 relatively convenient.
[0052] Optionally, the strip light source assembly 2 has a heat dissipation fin portion, which forms a first nut fixing groove 201 corresponding to the mounting U-shaped groove 121. The heat dissipation fin portion not only provides heat dissipation but also serves to connect with the housing 1, thus eliminating the need for an additional bracket to support the first strip light source 21.
[0053] Optionally, a first nut fixing groove 201 is provided on both sides of the heat dissipation fin portion, and a second nut fixing groove 202 is provided at both ends of the heat dissipation fin portion.
[0054] Optionally, a white paint reflective layer is provided in the diffuse reflection area. The white paint reflective layer is a diffuse reflection layer obtained through a white paint baking process.
[0055] Optionally, the housing 1 includes four side panels 12, the inner surfaces of which near the strip light source assembly 2 are covered with a white paint reflective layer.
[0056] Optionally, the diffuse reflection zone covers the bottom surface of the top plate 11.
[0057] Example 2
[0058] This embodiment discloses a visual inspection device, including a camera 4 and a lightbox as described in Embodiment 1.
[0059] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.
Claims
1. A lightbox, characterized in that, include: The box (1) has a light outlet (101) at the bottom and a top plate (11) facing the light outlet (101). The bottom surface of the top plate (11) has a diffuse reflection area. A strip light source assembly (2) is installed in the housing (1). The light emitted by the strip light source assembly (2) can be reflected by the diffuse reflection area and emitted from the light outlet (101).
2. The lightbox according to claim 1, characterized in that, The top plate (11) has a through detection hole (111). The strip light source assembly (2) includes at least two first strip light sources (21), and one first strip light source (21) is provided on each of the opposite sides of the detection hole (111).
3. The lightbox according to claim 2, characterized in that, The strip light source assembly (2) includes two second strip light sources (22), and a second strip light source (22) is provided on each of the opposite sides of the detection hole (111). The two first strip light sources (21) and the two second strip light sources (22) are connected end to end to form a rectangular structure, and the rectangular structure surrounds the center line of the detection hole (111).
4. The lightbox according to claim 1, characterized in that, The box (1) includes a side plate (12), on which a U-shaped groove (121) is provided, and the U-shaped groove (121) penetrates through the side plate (12), and the groove of the U-shaped groove (121) extends to the bottom edge of the side plate (12) to form a U-shaped notch; The strip light source assembly (2) is provided with a first nut fixing groove (201), and the fastening screw (3) can extend into the mounting U-shaped groove (121) and be threadedly connected to the nut in the first nut fixing groove (201).
5. The lightbox according to claim 4, characterized in that, The strip light source assembly (2) has a heat dissipation fin portion, which forms the first nut fixing groove (201) corresponding to the mounting U-shaped groove (121).
6. The lightbox according to claim 5, characterized in that, A first nut fixing groove (201) is provided on each of the two opposite sides of the heat dissipation fin portion, and a second nut fixing groove (202) is provided at each of the two opposite ends of the heat dissipation fin portion.
7. The lightbox according to claim 1, characterized in that, The diffuse reflection zone is provided with a white paint reflective layer.
8. The lightbox according to claim 4, characterized in that, The housing (1) includes four side panels (12), and the inner surface of the side panels (12) near the strip light source assembly (2) is covered with a white paint reflective layer.
9. The lightbox according to claim 1, characterized in that, The diffuse reflection zone covers the bottom surface of the top plate (11).
10. A visual inspection device, characterized in that, Includes a camera (4) and a lightbox as claimed in any one of claims 1 to 9.