Light source device and visual inspection equipment

Abstract

The utility model relates to the technical field of light sources, and discloses a light source device and visual inspection equipment, comprising a circuit board on which a plurality of lamp beads are arranged at intervals; each light guide assembly comprises a light guide column, an incident light condensing lens and an emergent light condensing lens; the light guide column extends in a bent mode, one end of the light guide column directly faces one lamp bead, and the other end of the light guide column faces a set point. The incident light condensing lens is installed at the end, close to the lamp beads, of the light guide column and used for guiding light emitted by the corresponding lamp beads into the light guide column. The emergent light condensing lens is installed at the other end, away from the lamp bead, of the light guide column so as to converge light rays emitted to the set point from the light guide column. According to the light source device and the visual inspection equipment, the lighting effect on the workpiece can be improved under the condition that the height of the installation space is limited.

Description

Technical Field

[0001] The utility model relates to the technical field of light sources, and in particular to a light source device and visual detection equipment. Background Art

[0002] The current mainstream light source devices usually include a circuit board, on which lamp beads are installed. The lamp beads generally emit light vertically downward, and then emit light to the workpiece through a diffuser to illuminate the workpiece. However, in the current light source structure, the distance between the lamp beads and the workpiece is relatively far, the required installation space is relatively high, the light scattering is relatively serious, and the workpiece must be directly in front of the lamp beads to have a good lighting effect. In the case of limited installation space height, the existing light source device has a poor lighting effect on the workpiece.

[0003] In view of this, it is necessary to design a light source device and a visual inspection device that can improve the lighting effect on the workpiece when the installation space is highly limited.

[0004] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Utility Model Content

[0005] The utility model provides a light source device and visual inspection equipment, which can improve the lighting effect on a workpiece when the installation space is highly limited.

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

[0007] A light source device, comprising:

[0008] A circuit board, on which a plurality of lamp beads are arranged at intervals;

[0009] A plurality of light guide components, each light guide component comprising a light guide column, a light input condenser lens and a light output condenser lens; the light guide column is bent and extended, and one end of the light guide column is facing one of the lamp beads, and the other end faces a set point;

[0010] The light input focusing lens is installed at one end of the light guide column close to the lamp bead, and is used to guide the corresponding light emitted by the lamp bead into the light guide column; the light output focusing lens is installed at the other end of the light guide column away from the lamp bead to converge the light emitted from the light guide column to the set point.

[0011] Optionally, all the light-emitting condenser lenses have the same size, and the distances from the focal points of the light-emitting condenser lenses on the side close to the set point to the set point are the same.

[0012] Optionally, the light incident condensing lens is crescent-shaped; the light incident condensing lens cover is arranged on one of the lamp beads, and the light emitting surface of the light incident condensing lens and the light incident surface of the light guide column are in contact with each other.

[0013] Optionally, a reflective coating is provided on the outer periphery of the light guide column, and the reflective side of the reflective coating faces the interior of the light guide column.

[0014] Optionally, the light-emitting focusing lens is hemispherical, including a mounting plane and a spherical curved surface;

[0015] The mounting plane is in close contact with the end surface of the other end of the light guide column, and the radius of the light emitting focusing lens is greater than the radius of the light guide column.

[0016] Optionally, the center distances between two adjacent light-emitting focusing lenses are equal.

[0017] Optionally, the light source device further comprises a heat sink, the circuit board is mounted on the heat sink, and an insulating heat-conducting layer is provided between the circuit board and the heat sink.

[0018] Optionally, the light source device further comprises a lifting device for driving the heat sink to be lifted and lowered in a vertical direction, and the lifting device is installed on one side of the top of the heat sink.

[0019] Optionally, the light source device further comprises a support plate for supporting the light guide column, and the support plate is provided with a through hole for the light guide column to pass through;

[0020] The support plate has a first plate surface and a second plate surface relative to each other, and the through hole extends from the first plate surface to the second plate surface; the closer the through hole is to the first plate surface, the larger the diameter is, and the closer the through hole is to the second plate surface, the larger the diameter is; the minimum aperture of the through hole is the same as the diameter of the light guide column, and the hole wall of the through hole has a smooth transition.

[0021] A visual inspection device comprises a light source device as described in any one of the above items.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The light source device and visual inspection equipment provided by the utility model are provided with a curved light guide column, the light input end of the light guide column is provided with a light input condensing lens for converging the light of the lamp beads, and the light output end of the light guide column is provided with a lens for converging the light to emit to a set point, so that the surface of the workpiece at the center point position can be better illuminated; the curved and extended light guide column can be as close to the workpiece as possible under the condition of a low spatial height, and with the light input condensing lens and the light output condensing lens, more light can be converged on the surface of the workpiece, and the light output lighting effect is better.

[0024] The present invention has other characteristics and advantages, which will be apparent from the accompanying drawings and subsequent specific embodiments incorporated herein, or will be described in detail in the accompanying drawings and subsequent specific embodiments incorporated herein, which together are used to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the installation structure of the light source device provided in an embodiment of the utility model;

[0027] Figure 2 It is a schematic diagram of the installation structure of another light source device provided by an embodiment of the utility model;

[0028] Figure 3 It is a schematic diagram of the partial cross-sectional structure of the support plate provided in the embodiment of the utility model.

[0029] Figure numerals: 1, circuit board; 2, lamp bead; 3, light guide assembly; 31, light guide column; 32, light input focusing lens; 33, light output focusing lens; 331, mounting plane; 332, spherical surface; 4, heat sink; 5, insulating thermal conductive layer; 6, lifting device; 7, support plate; 71, first board surface; 72, second board surface; 701, through hole; 100, setting point. DETAILED DESCRIPTION

[0030] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0031] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0032] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0033] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0034] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0035] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0036] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0037] In the description of the embodiments of the present application, the spatially related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the accompanying drawings. It is only for the convenience of describing the specific embodiments of the present application or for the reader's understanding, rather than indicating or implying 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, it should not be construed as a limitation on the embodiments of the present application.

[0038] Unless otherwise clearly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two components or the interaction relationship between two components. For those skilled in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0039] Embodiment 1

[0040] In view of the defects existing in the above-mentioned existing light source devices, based on the rich practical experience and professional knowledge in the design and manufacture of such products for many years, and in cooperation with the application of theory, the applicant actively conducts research and innovation in the hope of creating a technology that can solve the defects in the existing technology and make the light source device more practical. After continuous research, design, and repeated sample making and improvement, the present utility model with practical value has finally been created.

[0041] Please refer to Figure 1 , an embodiment of the present utility model provides a light source device, including: a circuit board 1, on which a plurality of lamp beads 2 are arranged at intervals. The circuit board 1 is used to supply power to the lamp beads 2 and control the opening and closing of the lamp beads 2; a plurality of light guiding components 3, the light guiding components 3 include a light guiding column 31, an incident light condensing lens 32, and an outgoing light condensing lens 33; the light guiding column 31 extends in a curved manner, and one end of the light guiding column 31 faces a lamp bead 2, and the other end faces a set point 100; the incident light condensing lens 32 is installed at one end of the light guiding column 31 close to the lamp bead 2 for guiding the light emitted by the corresponding lamp bead 2 into the light guiding column 31; the outgoing light condensing lens 33 is installed at the other end of the light guiding column 31 far from the lamp bead 2 to converge the light emitted from the light guiding column 31 towards the set point 100.

[0042] Specifically, the light emitted by the lamp bead 2 is converged by the light-input focusing lens 32 and then emitted into the light-guiding column 31. The light-guiding column 31 guides the light to the light-emitting end and then converges it through the light-emitting focusing lens 33 and then emits it to the set point 100. Generally, the center point of the workpiece is located at the set point 100, so that the outer surface of the workpiece is better illuminated under the light emitted by multiple light-guiding components 3. It should also be specially explained that the light-guiding column 31 is bent and extended, so it can extend to one side of the workpiece in a narrow space, thereby illuminating the workpiece at the set position. The light-guiding column 31 can be partially bent in an S-shape, partially bent in a C-shape, or even bent in a U-shape.

[0043] In this embodiment, the number of lamp beads 2 is the same as the number of light guide components 3. Multiple light guide components 3 can improve the light intake efficiency and better illuminate the surface of the workpiece.

[0044] Preferably, all the light-emitting condenser lenses 33 have the same size, and the distance from the focus of the condenser lens close to the set point 100 to the set point 100 is the same. This is equivalent to the light-emitting condenser lenses 33 being arranged in an arc around the set point 100, so that the light can illuminate the workpiece from more directions, which is conducive to improving the effect of illuminating the workpiece, so that defects on the surface of the workpiece can be more easily captured by the inspection camera.

[0045] Optionally, the light incident condensing lens 32 is crescent-shaped; the light incident condensing lens 32 is covered on a lamp bead 2, and the light emitting surface of the light incident condensing lens 32 and the light incident surface of the light guide column 31 are in contact with each other.

[0046] Specifically, the concave side of the light incident focusing lens 32 is covered on the lamp bead 2 to better focus the light.

[0047] Optionally, a reflective coating is provided on the outer periphery of the light guide column 31 , and the reflective side of the reflective coating faces toward the inside of the light guide column 31 .

[0048] Optionally, the light-emitting focusing lens 33 is hemispherical, including a mounting plane 331 and a spherical curved surface 332; the mounting plane 331 is fitted and connected to the end surface of the other end of the light guide column 31, and the radius of the light-emitting focusing lens 33 is greater than the radius of the light guide column 31. Specifically, the mounting plane 331 is to reduce the difficulty of fitting and bonding and improve the convenience of assembly.

[0049] Optionally, the center distances between two adjacent light emitting condenser lenses 33 are equal, so that the light can be irradiated on the surface of the workpiece more evenly.

[0050] Optionally, the light source device further includes a heat sink 4, the circuit board 1 is mounted on the heat sink 4, and an insulating heat-conducting layer 5 is provided between the circuit board 1 and the heat sink 4. The provision of the insulating heat-conducting layer 5 can further improve the heat dissipation effect, so that the power of the lamp bead 2 can be set to be larger, which is also conducive to further improving the light intensity irradiated to the surface of the workpiece.

[0051] Optionally, the light source device further includes a lifting device 6 for driving the heat sink 4 to rise and fall in the vertical direction, and the lifting device 6 is installed on one side of the top of the heat sink 4. The lifting device 6 controls the height of the heat sink 4, thereby controlling the distance between the lamp bead 2 and the light-incoming focusing lens 32, and further controlling the light intensity of the light projected onto the workpiece surface.

[0052] Optionally, see Figure 2 and Figure 3 , the heat dissipation plate 4 is connected with a support plate 7 for supporting the light guide column 31, and a through hole 701 is provided on the support plate 7 for the light guide column 31 to pass through; the support plate 7 has a first plate surface 71 and a second plate surface 72 relative to each other, and the through hole 701 runs from the first plate surface 71 to the second plate surface 72; the closer the through hole 701 is to the first plate surface 71, the larger the diameter is, and the closer it is to the second plate surface 72, the larger the diameter is, the minimum aperture of the through hole 701 is the same as the diameter of the light guide column 31, and the hole wall of the through hole 701 has a smooth transition. Specifically, the diameter of the through hole 701 is arranged in a large-small-large manner, which can effectively facilitate the light guide columns 31 with different curvatures to enter the through hole 701, and the minimum diameter of the through hole 701 is consistent with the outer diameter of the light guide column 31, which can effectively position and fix the light guide column 31 to avoid the vibration of the light guide column 31 during use. It should also be noted that the diameter of the light guide column 31 remains unchanged.

[0053] Embodiment 2

[0054] This embodiment discloses a visual inspection device, including the light source device as described in the first embodiment.

[0055] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A light source device, characterized in that: include: A circuit board (1), wherein a plurality of lamp beads (2) are arranged at intervals on the circuit board (1); A plurality of light guide components (3), wherein the light guide components (3) comprise a light guide column (31), a light input condenser lens (32) and a light output condenser lens (33); the light guide column (31) is bent and extended, and one end of the light guide column (31) faces one of the lamp beads (2), and the other end faces a set point (100); The light-incoming focusing lens (32) is mounted on one end of the light-guiding column (31) close to the lamp bead (2) and is used to guide the light emitted by the corresponding lamp bead (2) into the light-guiding column (31); the light-emitting focusing lens (33) is mounted on the other end of the light-guiding column (31) away from the lamp bead (2) to converge the light emitted from the light-guiding column (31) toward the set point (100).

2. The light source device according to claim 1, characterized in that: All the light-emitting condenser lenses (33) have the same size, and the distances from the focal points of the light-emitting condenser lenses (33) on the side close to the set point (100) to the set point (100) are the same.

3. The light source device according to claim 1, characterized in that: The light incident condensing lens (32) is crescent-shaped; the light incident condensing lens (32) is covered on one of the lamp beads (2), and the light emitting surface of the light incident condensing lens (32) and the light incident surface of the light guide column (31) are mutually attached.

4. The light source device according to claim 1, characterized in that: A reflective coating is provided on the outer periphery of the light guide column (31), and the reflective side of the reflective coating faces the interior of the light guide column (31).

5. The light source device according to claim 1, characterized in that: The light-emitting focusing lens (33) is hemispherical and comprises a mounting plane (331) and a spherical curved surface (332); The mounting plane (331) is fitted and connected to the end surface of the other end of the light guide column (31), and the radius of the light output focusing lens (33) is greater than the radius of the light guide column (31).

6. The light source device according to claim 2, characterized in that: The center distances of two adjacent light-emitting condensing lenses (33) are equal.

7. The light source device according to claim 1, characterized in that: It also comprises a heat sink (4), the circuit board (1) being mounted on the heat sink (4), and an insulating heat-conducting layer (5) being provided between the circuit board (1) and the heat sink (4).

8. The light source device according to claim 7, characterized in that: It also comprises a lifting device (6) for driving the heat dissipation plate (4) to lift and lower in a vertical direction, wherein the lifting device (6) is installed on one side of the top of the heat dissipation plate (4).

9. The light source device according to claim 1, characterized in that: It also comprises a support plate (7) for supporting the light guide column (31), wherein the support plate (7) is provided with a through hole (701) for the light guide column (31) to pass through; The support plate (7) has a first plate surface (71) and a second plate surface (72) which are opposite to each other, and the through hole (701) passes through from the first plate surface (71) to the second plate surface (72); the closer the through hole (701) is to the first plate surface (71), the larger its diameter is, and the closer it is to the second plate surface (72), the larger its diameter is; the minimum aperture of the through hole (701) is the same as the diameter of the light guide column (31), and the hole wall of the through hole (701) has a smooth transition.

10. A visual inspection device, characterized in that: The invention comprises a light source device as claimed in any one of claims 1 to 9.

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