Light source assembly and appearance detection equipment

Abstract

The utility model discloses a light source assembly and appearance detection equipment, the light source assembly comprises a shell, a light-transmitting piece and a plurality of light source pieces, the light-transmitting piece comprises at least one lens group, each lens group comprises a plurality of lens units which are sequentially arranged along a first direction, the refractive index of the lens units is greater than that of air, and the light source pieces are arranged in the shell. The multiple light source parts emit light through the light outlets, each light source part corresponds to one lens unit, the surface of the side, away from the corresponding light source part, of each lens unit forms a concave curved surface concaved towards the corresponding light source part, and the concave curved surfaces of every two adjacent lens units intersect with each other. Part of light rays which are emitted by the adjacent light source pieces and penetrate through the corresponding lens units are converged on the outer side of the shell. According to the light source assembly provided by the embodiment of the utility model, the illumination effect of large area and relatively bright illumination can be conveniently realized, the position under each light source piece can receive light rays of different angles of a plurality of light source pieces, and the image acquisition quality is improved, so that the detection accuracy and the detection efficiency are improved.

Description

Technical Field

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

[0002] Appearance inspection equipment is an automated device that uses machine vision technology to detect the shape, surface, color and other features of products or components. Its main function is to use image recognition technology to determine whether the product has various defects that affect the appearance quality, such as foreign matter, blemishes, scratches, burrs, stains, etc., thereby screening out defective products.

[0003] Appearance inspection equipment usually uses a light source assembly to illuminate the part to be inspected; however, in the related art, the light source assembly cannot provide a suitable light source for the part to be inspected, and the image acquisition quality is poor, which affects the inspection accuracy and efficiency. The light source assembly needs to be further improved. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the related art. To this end, the utility model proposes a light source assembly, which is convenient for achieving a large-area, brighter lighting effect, and the position directly below each light source can receive light from multiple light sources at different angles, so as to achieve multi-angle lighting and improve detection accuracy and detection efficiency.

[0005] The utility model also provides an appearance detection device having the light source assembly.

[0006] According to the first aspect of the utility model, the light source assembly comprises: a shell having a accommodating cavity therein, the accommodating cavity being open on one side in a first direction to form a light outlet; a light-transmitting member, the light-transmitting member being arranged in the accommodating cavity, at least a portion of the light-transmitting member being opposite to the light outlet, and comprising at least one group of lens groups, each group of the lens groups comprising a plurality of lens units arranged in sequence along a second direction, the refractive index of the lens unit being greater than the refractive index of air, and the second direction being perpendicular to the first direction; a plurality of light source members, the plurality of light source members being arranged in the accommodating cavity and located on the side of the light-transmitting member away from the light outlet, the plurality of light source members emitting light through the light outlet, each of the light source members corresponding to one of the lens units, wherein a surface of the lens unit on the side away from the corresponding light source member is formed as a concave curved surface concave toward the light source member, and the concave curved surfaces of two adjacent lens units intersect, so that part of the light emitted by the adjacent light source members and passing through the corresponding lens unit converges at the outside of the shell.

[0007] According to the light source assembly of the embodiment of the utility model, when the light emitted by the light source part enters the air from the concave surface, the light is refracted and diffused outward, so as to expand the illuminated area of ​​the light source assembly and improve the light utilization rate; and the concave surfaces of two adjacent lens units intersect, so that part of the light emitted by the adjacent light source parts and passing through the corresponding lens units converges on the outside of the shell, then the intersection area of ​​the light emitted by the adjacent light source parts and passing through the corresponding lens units can simultaneously receive the light of at least two light source parts, which can improve the illumination intensity of the intersection area, and the light source assembly has a high degree of illumination of the illuminated parts and a good lighting effect, so that the light source assembly can easily achieve a large area and brighter lighting effect, so that different positions of the parts to be detected can receive light at different angles, thereby improving the image acquisition quality, which is conducive to improving the detection accuracy and detection efficiency.

[0008] In some embodiments, the light source assembly is configured to satisfy at least one of the following conditions: Condition A1, on a preset plane, the orthographic projections of two adjacent concave surfaces are tangent, and the preset plane is perpendicular to the axial direction of the light outlet; Condition A2, there are multiple lens groups, and the multiple lens groups are arranged in sequence along a third direction, and the third direction is respectively perpendicular to the first direction and the second direction; Condition A3, the centers of the multiple lens units are arranged at equal intervals; Condition A4, the concave surface is a spherical surface, and the lens unit is configured as a double concave lens, a plano-concave lens or a convex-concave lens, and the light source component is arranged directly opposite to the center of the sphere corresponding to the concave surface.

[0009] In some embodiments, the light-transmitting member is an integral member, and a portion of a surface of the light-transmitting member on a side facing away from the light source member except for the concave curved surface is formed as a frosted surface; and / or a portion of a surface of the light-transmitting member on a side facing away from the light outlet except for a light incident area corresponding to the light source member is provided with a reflective film.

[0010] In some embodiments, the shell has a mounting opening formed on at least one of the two sides in the second direction, the mounting opening is connected to the accommodating cavity, the light source component is fixed on the light-transmitting component, and the light-transmitting component and the light source component are suitable for being pullable in the accommodating cavity through the mounting opening.

[0011] In some embodiments, at least one inner wall surface of the shell on both sides in the third direction has a guide groove, and a guide protrusion is formed on the light-transmitting member. The guide groove and the guide protrusion slide together along the second direction to guide the light-transmitting member into the installation cavity, and the third direction is perpendicular to the second direction and the first direction respectively.

[0012] In some embodiments, the housing is further formed with a heat dissipation channel which is spaced apart from the accommodating cavity and is located on a side of the accommodating cavity away from the light outlet, and the heat dissipation channel has an inlet and an outlet.

[0013] In some embodiments, the light source assembly further includes: a heat dissipation fan, the inlet is multiple and formed on a side of the heat dissipation channel away from the accommodating cavity, and a heat dissipation fan is respectively provided at each inlet.

[0014] In some embodiments, the shell includes a first main body and a second main body, the first main body and the second main body are split parts, the first main body has the accommodating cavity, the second main body has the heat dissipation channel formed in it, the first main body has mounting openings connected to the accommodating cavity on both sides in the second direction, the light-transmitting part and the light source part are suitable for being pullable in the accommodating cavity through the mounting openings, the second main body has connecting parts at both ends in the second direction, the connecting parts extend toward the light outlet and are spaced apart on the side of the mounting opening away from the light outlet, and the connecting parts are connected to the first main body.

[0015] The appearance inspection device according to the second aspect of the present invention comprises a carrying component and a light source component according to the first aspect of the present invention. The carrying component is used to carry the part to be inspected and is located on the side where the light outlet of the light source component is located.

[0016] According to the appearance inspection device of the embodiment of the utility model, by adopting the above-mentioned light source assembly, it is easy to realize reliable illumination of the part to be inspected, which is beneficial to improving the inspection accuracy and inspection efficiency.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a cross-sectional view of a light source assembly according to some embodiments of the utility model, and the arrow indicates the direction of light propagation;

[0020] Figure 2 yes Figure 1 Schematic diagram of a single light source element and a light-transmitting element shown in , where the arrow indicates the direction of light propagation;

[0021] Figure 3 yes Figure 1 A bottom view of the light-transmitting member and the plurality of light source members shown in ;

[0022] Figure 4 yes Figure 1A side view of the light source member and the light transmitting member shown in ;

[0023] Figure 5 yes Figure 1 A side view of the first body shown in FIG.

[0024] Reference numerals:

[0025] Light source assembly 100,

[0026] Shell 1, accommodating cavity 1a, light outlet 1b, preset plane 1c, mounting port 1d, guide groove 1e, heat dissipation channel 1f, inlet 1g, outlet 1h, first body 11, second body 12, connecting portion 121,

[0027] light-transmitting member 2, lens group 21, lens unit 211, concave surface 2111, guide protrusion 22,

[0028] Light source component 3, reflective film 4, and heat dissipation fan 5. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0031] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0032] Hereinafter, a light source assembly 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0033] like Figure 1As shown, the light source assembly 100 includes a housing 1 , a light-transmitting element 2 and a plurality of light source elements 3 .

[0034] The housing 1 has a housing chamber 1a, which is located in a first direction ( Figure 1 The light transmitting member 2 is disposed in the accommodating cavity 1a, and at least a portion of the light transmitting member 2 is opposite to the light transmitting port 1b, and the at least a portion of the light transmitting member 2 includes at least one lens group 21, and each lens group 21 includes a plurality of lens groups along the second direction ( Figure 1 The lens units 211 are arranged in sequence along the F2 direction in the image, the multiple light source components 3 are all arranged in the accommodating cavity 1a, and the multiple light source components 3 are all located on the side of the light-transmitting component 2 away from the light outlet 1b, each light source component 3 corresponds to a lens unit 211, and the light emitted by each light source component 3 can pass through the corresponding lens unit 211 and be emitted through the light outlet 1b, so as to realize the lighting function of the light source assembly 100.

[0035] Among them, the refractive index of the lens unit 211 is greater than the refractive index of air (for example, the refractive index of air under standard conditions is approximately 1.00029), then relative to air, the lens unit 211 can be understood as a light-dense medium; the surface of the lens unit 211 on one side facing away from the corresponding light source component 3 is formed as a concave surface 2111 that is concave toward the light source component 3, and the concave surfaces 2111 of two adjacent lens units 211 intersect, so that part of the light emitted by the adjacent light source components 3 and passing through the corresponding lens units 211 converges on the outside of the shell 1, then part of the light emitted by the adjacent light source components 3 and passing through the corresponding lens units 211 can converge on the side of the light-transmitting component 2 facing away from the light source component 3, the intersection area is located on the outside of the shell 1, and the upper and lower spacing between the intersection area and the light-transmitting component 2 is reduced, for example, the area below the lower surface of the light-transmitting component 2 can be the intersection area, or the area below the lower surface of the shell 1 can be the intersection area. For example, taking the plane where the peripheral wall of the light outlet 1b is located as a reference plane, part of the light emitted by adjacent light sources 3 and passing through the corresponding lens units 211 converges on the side of the reference plane away from the accommodating cavity 1a.

[0036] It can be seen that the light emitted by the light source 3 can be directed to the corresponding lens unit 211. Since the refractive index of the lens unit 211 is relatively large compared to the air, and the surface of the lens unit 211 on one side away from the corresponding light source 3 is formed as a concave surface 2111, it can be understood that the light-emitting surface of the lens unit 211 is the concave surface 2111. Therefore, when the light emitted by the light source 3 enters the air from the concave surface 2111, the light is refracted and diffused outward, making the light emitted by the light source 3 more dispersed, so as to expand the illuminated area of ​​the light source assembly 100 and improve the light utilization rate; and the concave surfaces 2111 of two adjacent lens units 211 intersect, so that the light emitted by the adjacent light source 3 Part of the light passing through the corresponding lens unit 211 converges on the outside of the shell 1. Then, in the intersection area of ​​the light passing through the corresponding lens unit 211 emitted by the adjacent light source parts 3, for the area directly below each light source part 3, it can simultaneously receive light from different directions of at least two different light source parts 3, which can improve the light intensity directly below each light source part 3 to a certain extent. The parts to be illuminated (such as the parts to be detected described later) can be placed directly below multiple light source parts 3. The light source assembly 100 has a high degree of illumination and good lighting effect for the parts to be illuminated, so that the light source assembly 100 can easily achieve a large area and brighter lighting effect. In addition, since the intersection area is located on the outside of the shell 1, the shell 1 is not easy to limit the size of the intersection area, and the shell 1 is not easy to affect the parts to be illuminated placed in the intersection area, which is convenient for the arrangement of the parts to be illuminated.

[0037] Exemplarily, for a single lens group 21, the multiple lens units 211 are respectively the first lens unit, the second lens unit, ..., the nth lens unit along the first direction, n ≥ 2 and is a positive integer, and the corresponding light source components 3 are respectively the first light source component, the second light source component, ..., the nth light source component, and the position directly below the first lens unit can receive light from at least the first light source component and the second light source component, and the position directly below the second lens unit can receive light from at least the first light source component, the second light source component and the third light source component, and so on.

[0038] It is understandable that the light emitted by the light source 3 can be parallel light or non-parallel divergent light; the light source 3 can be fixed on the inner wall of the housing 1 or on the light-transmitting member 2. For example, the light source 3 is an LED lamp bead, but it is not limited thereto.

[0039] Taking the light source assembly 100 for appearance inspection equipment as an example, since the light source assembly 100 has a large illuminated area, the appearance inspection equipment can detect various sizes of parts to be inspected (such as PCB boards, glass, silicon crystals, etc.), improving the applicability and practicality of the appearance inspection equipment, and will not limit the size of the parts to be inspected due to the small illuminated area of ​​the light source assembly 100; at the same time, since the area directly below each light source component 3 can simultaneously receive light emitted from different angles from multiple different light source components 3, the reflected light of the parts to be inspected is increased, the image acquisition quality is improved, and the sampling is more comprehensive, thereby reducing the missed detection rate and improving the accuracy of defect detection. For parts to be inspected with larger sizes, there is no need to move each area to be inspected of the parts to be inspected to a specific inspection area one by one, which is conducive to improving the detection efficiency. Of course, the application of the light source assembly 100 is not limited to this.

[0040] Compared to some technologies, the concave surfaces of two adjacent lens units are spaced apart, and the light rays emitted by two adjacent light sources passing through the lens units are not easy to intersect, or even if they intersect, the intersection area is relatively far from the light-transmitting member, and the refractive index requirements and concave surface processing requirements of the light-transmitting member are relatively high. At the same time, because the area directly below the concave surfaces of two adjacent lens units is easy to receive light from multiple different light sources, it is easy to form a light and dark lighting effect below the light-transmitting member, and the lighting uniformity is poor compared to the above-mentioned solution of the present application. The present application intersects the concave surfaces 2111 of two adjacent lens units 211, which is convenient for improving the lighting effect and enhancing the lighting uniformity.

[0041] For example, in conjunction with the figure, taking the first direction as the up-down direction and the second direction as the left-right direction as an example, in other examples of the present application, the arrangement posture of the light source assembly 100 when in use is not limited to Figure 1 The posture shown in , that is, the first direction can also be the left-right direction, the front-back direction, etc. Figure 1 As shown, the lower side of the accommodating cavity 1a is open to form a light outlet 1b, the light-transmitting member 2 is arranged in the accommodating cavity 1a, the lens group 21 of the light-transmitting member 2 is opposite to the light outlet 1b, the lens group 21 can be located on the upper side of the light outlet 1b, or the lower surface of the lens group 21 is substantially flush with the peripheral wall of the light outlet 1b, the lens group 21 includes a plurality of lens units 211 arranged in sequence along the left-right direction, the plurality of light source members 3 correspond to the plurality of lens units 211 one by one, the light source member 3 is located on the upper side of the corresponding lens unit 211, and the light source member 3 is located on the upper side of the corresponding lens unit 211. The source component 3 can be fixed on the inner top wall of the shell 1, or the light source component 3 is fixed on the upper surface of the lens unit 211, so that the light source component 3 is located between the inner top wall of the shell 1 and the upper surface of the lens unit 211, and the lower surface of the lens unit 211 is formed as a concave surface 2111 that is concave upward, and the concave surfaces 2111 of two adjacent lens units 211 intersect, so that part of the light emitted by the adjacent light source components 3 and passing through the corresponding lens units 211 converges outside the shell 1 and is located at the lower side of the light outlet 1b.

[0042] According to the light source assembly 100 of the embodiment of the utility model, when the light emitted by the light source part 3 enters the air from the concave surface 2111, the light is refracted and diffused outward, so as to expand the illuminated area of ​​the light source assembly 100 and improve the light utilization rate; and the concave surfaces 2111 of two adjacent lens units 211 intersect, so that part of the light emitted by the adjacent light source parts 3 and passing through the corresponding lens units 211 intersects at the outside of the housing 1, then in the intersection area of ​​the light emitted by the adjacent light source parts 3 and passing through the corresponding lens units 211, the light of at least two light sources 3 can be received at the same time, and the light intensity of the intersection area can be improved, and the light source assembly 100 has a high degree of illumination and good lighting effect for the illuminated parts, so that the light source assembly 100 is easy to achieve a large area and bright lighting effect. It can be seen that when the light source assembly 100 is used in appearance inspection equipment, it is convenient for different positions of the parts to be inspected to receive light at different angles, improve the image acquisition quality, make the sampling more comprehensive, and thus help improve the detection accuracy and detection efficiency.

[0043] Optionally, the structures, sizes and other specifications of the multiple lens units 211 of the lens group 21 are completely consistent, and the parameters of the corresponding multiple light source components 3 are also completely consistent, so as to facilitate finding a suitable plane perpendicular to the axial direction of the light outlet 1b in the intersection area as the working surface R. When the light source component 100 is used in the appearance inspection equipment, the part to be inspected can be placed on the working surface R so as to take into account both the illuminated area and the light intensity of the part to be inspected. Of course, when the lens group 21 is a plurality of groups, all lens units 21 have the same specifications, and all light source components 3 have the same specifications, and the working surface R can be further expanded to be applicable to larger-sized parts to be inspected.

[0044] In some embodiments, the light source assembly 100 is configured to satisfy at least one of Condition A1, Condition A2, Condition A3, and Condition A4.

[0045] Among them, condition A1 is: on the preset plane 1c, the orthographic projections of two adjacent concave surfaces 2111 are tangent, and the preset plane 1c is perpendicular to the axial direction of the light outlet 1b, then the above-mentioned tangent point of the orthographic projections of the two adjacent concave surfaces 2111 is the intersection point of the two adjacent concave surfaces 2111, which is convenient for making full use of the light emitted by the light source component 3 without excessively increasing the size of the light-transmitting component 2.

[0046] For example, Figure 1 and Figure 3As shown, the axial direction of the light outlet 1b is the up and down direction, the preset plane 1c is a horizontal plane, and on the preset plane 1c, the orthographic projection of the concave surface 2111 is a circle. The circular orthographic projections corresponding to two adjacent concave surfaces 2111 are arranged tangent to each other, so that the concave surface 2111 and the shape of the light beam emitted by the corresponding light source component 3 (for example, roughly a cone) have a good matching consistency, so as to make full use of the light emitted by the light source component 3.

[0047] Condition A2 is: the lens group 21 is a plurality of groups, and the plurality of lens groups 21 are arranged along the third direction ( Figure 4 and Figure 5 The first direction (F3 direction) is arranged in sequence, the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction. Thus, it is convenient to further increase the illuminated area of ​​the light source assembly 100. Among them, the corresponding lens units 211 of the two adjacent lens groups 21 are arranged opposite to each other along the third direction, and the concave surfaces 2111 of the two adjacent lens units 211 in the third direction also intersect, that is, when the lens group 21 is a plurality of groups, no matter the two adjacent lens units 211 are connected in the second direction or are adjacent in the third direction, the concave surfaces 2111 corresponding to the two intersect, so that part of the light emitted by the adjacent light source parts 3 in the second direction and passing through the corresponding lens units 211 intersects with the outside of the housing 1, and part of the light emitted by the adjacent light source parts 3 in the third direction and passing through the corresponding lens units 211 intersects with the outside of the housing 1, which is convenient to further improve the light intensity of the intersection area, which is conducive to further improving the detection accuracy.

[0048] At this time, since the middle light source component 3 is surrounded by four other light source components 3, the position directly below the middle light source component 3 can not only receive the light of the middle light source component 3 corresponding to the upper line, but also receive the light of the other four light source components 3 around it, so that different positions directly below the middle light source component 3 can be simply understood as being illuminated by the annular light source, thereby improving the diversity of light received by the position directly below the light source component 3, which is beneficial to further improve the image quality.

[0049] Of course, in other embodiments of the present application, the lens group 21 can also be a group; of course, the arrangement of the multiple lens units 21 is not limited.

[0050] Condition A3 is: the centers of the multiple lens units 211 are arranged at equal intervals. When the lens group 21 is a group, the centers of the multiple lens units 211 of the lens group 21 are arranged at equal intervals. When the lens group 21 is a plurality of groups, the plurality of lens groups 21 can be arranged in sequence along the third direction, and the spacing between the centers of the corresponding two lens units 211 of two adjacent lens groups 21 is equal to the spacing between the centers of the adjacent two lens units 211 of the same lens group 21. Thus, it is easy to realize the equal spacing of the multiple lens units 211, which is conducive to improving the uniformity of illumination.

[0051] Condition A4 is: Figure 1 and Figure 4 As shown, the concave surface 2111 is a spherical surface, and the lens unit 211 is constructed as a double concave lens, a plano-concave lens or a convex-concave lens (a convex-concave lens is one in which the concavity of the concave surface 211 is greater than the convexity of the surface of the lens unit 211 facing away from the concave surface 2111), and the light source component 3 is arranged opposite to the center of the corresponding concave surface 2111. For example, the light source component 3 is opposite to the center of the corresponding concave surface 2111 along a first direction, so that the lens unit 211 can achieve reliable divergence of the light emitted by the light source component 3, especially the conical light beam, and the best part of the light emitted by the light source component 3 can be entirely covered by the concave surface 211 to achieve the effect of optimal light path refraction.

[0052] Exemplarily, taking the first direction as the up-down direction, the concave surface 2111 is located at the lower side of the lens unit 211 , the light source component 3 is located at the upper side of the lens unit 211 , and the light source component 3 is located directly above the center of the sphere corresponding to the concave surface 2111 .

[0053] Of course, in other embodiments of the present application, the concave surface 2111 may also be a non-spherical surface, for example, the concave surface 2111 may be a parabola, a hyperbola or other smooth surfaces.

[0054] In some embodiments, Figure 1 As shown, the light-transmitting member 2 is an integral member, and the surface of the light-transmitting member 2 on the side facing away from the light source member 3 except for the concave surface 2111 (for example Figure 3 The portion with the hatching line except the concave curved surface 2111 is formed as a frosted surface, which is relatively rough, and the roughness of the frosted surface is greater than that of the concave curved surface 2111, so that the light emitted by the light source component 3 and passing through the corresponding lens unit 211 can be reflected to the above-mentioned frosted surface to form diffuse reflection on the frosted surface, which is beneficial to further improve the lighting uniformity of the light source assembly 100; and / or, the light-transmitting component 2 is an integral component, and a reflective film 4 is provided on the surface of the side of the light-transmitting component 2 away from the light outlet 1b except for the light incident area corresponding to the light source component 3, and the reflective film 4 can reflect the light inside the light-transmitting component 2, reduce the light emitted by the light source component 3 from the side of the light-transmitting component 2 away from the light outlet 1b, and improve the light utilization rate.

[0055] It can be understood that the light-transmitting member 2 is an integral part. In this case, the entire light-transmitting member 2 can be made of the same material, and multiple lens units 211 are an integral part. If the light-transmitting member 2 is also formed with a guide protrusion 22, the lens group 21 and the guide protrusion 22 are an integral part; illustratively, the light-transmitting member 2 is an acrylic member.

[0056] In some embodiments, Figure 1As shown, a mounting opening 1d is formed on at least one of the two sides of the shell 1 in the second direction, and the mounting opening 1d is connected to the accommodating cavity 1a. The light source component 3 is fixed on the light-transmitting component 2 (for example, the light source component 3 is attached and fixed on the surface of the light-transmitting component 2). The light-transmitting component 2 and the light source component 3 are suitable for being withdrawable and arranged in the accommodating cavity 1a through the mounting opening 1d, so as to realize the rapid disassembly and assembly of the light-transmitting component 2 and the light source component 3, so as to replace and maintain the light-transmitting component 2 and the light source component 3, and no matter how many times the light-transmitting component 2 and the light source component 3 are repeatedly disassembled and assembled, the relative positions of the two will not change, that is, the relative positions of the light source component 3 and the corresponding lens unit 211 will not change, so the propagation path of the light emitted by the light source component 3 will not change due to the repeated disassembly and assembly of the light-transmitting component 2, which is beneficial to improve the lighting stability and reliability of the light source assembly 100.

[0057] The present application does not impose any specific restrictions on the connection method between the light source component 3 and the light-transmitting component 2 . For example, the light source component 3 and the light-transmitting component 2 are fixed by bonding.

[0058] It can be understood that during the disassembly and assembly process of the light-transmitting component 2 and the light source component 3, at least the peripheral wall of the mounting opening 1d can play a certain guiding role for the light-transmitting component 2; if a mounting opening 1d is formed on one of the two sides of the shell 1 in the second direction, a limiting structure can be provided on the other side of the shell 1 in the second direction, and the limiting structure can cooperate with the mounting opening 1d to limit the light-transmitting component 2 in at least the first direction (for example, the limiting structure cooperates with the mounting opening 1d to limit the light-transmitting component 2 in the first direction, or the limiting structure cooperates with the mounting opening 1d to limit the light-transmitting component 2 in the first direction and the third direction); if the shell 1 has mounting openings 1d formed on both sides of the second direction, the two mounting openings 1d can cooperate to limit the light-transmitting component 2 in at least the first direction, and the light-transmitting component 2 can be disassembled and assembled from any mounting opening 1d.

[0059] In some embodiments, Figure 4 and Figure 5 As shown, the inner wall surface of at least one of the two sides of the shell 1 in the third direction has a guide groove 1e, and a guide protrusion 22 is formed on the light-transmitting member 2. The guide groove 1e and the guide protrusion 22 slide and cooperate along the second direction to guide the light-transmitting member 2 into the installation cavity. The third direction is perpendicular to the second direction, and the third direction is perpendicular to the first direction.

[0060] It can be seen that in the above scheme, the guide protrusion 22 and the guide groove 1e can extend along the second direction. During the installation of the light-transmitting member 2 and the light source member 3, the guide groove 1e can always guide the light-transmitting member 2, so that the end of the light-transmitting member 2 that extends into the accommodating cavity 1a and is not installed in place will not be offset, making it less likely that the above-mentioned end of the light-transmitting member 2 will be difficult to install in place or require a long time to install in place, which can improve the installation stability and convenience of the light-transmitting member 2 and the light source member 3.

[0061] In addition, the guide groove 1e can be formed by a portion of the inner wall surface on the corresponding side of the shell 1 being recessed in the direction away from the light-transmitting member 2, and the guide protrusion 22 can be formed by a protrusion arranged on the corresponding side surface of the light-transmitting member 2 in the third direction. Then, the guide structure formed by the guide groove 1e and the guide protrusion 22 will not occupy the arrangement space of the lens unit 211, will not reduce the size of the lens unit 211 in the third direction, and will not increase the size of the light-transmitting member 2 in the third direction due to ensuring the size of the lens unit 211 in the third direction, thereby facilitating taking into account both the arrangement of the lens unit 211 and the occupied space of the light-transmitting member 2 at the same time.

[0062] The cross-sectional shapes of the guide protrusion 22 and the guide groove 1e are not specifically limited; for example, Figure 4 and Figure 5 As shown, the cross-sectional shape of the guide protrusion 22 is a square, and the guide groove 1e is a square groove adapted to the guide protrusion 22. Of course, in other examples, the cross-sectional shape of the guide protrusion 22 can also be a semicircle, a trapezoid, etc. It can be understood that in the embodiment of the present application, the guide protrusion 22 and the lens group 21 are different parts of the light-transmitting member 2.

[0063] In some embodiments, Figure 1 As shown, the shell 1 is also formed with a heat dissipation channel 1f spaced apart from the accommodating cavity 1a, and the heat dissipation channel 1f is located on the side of the accommodating cavity 1a away from the light outlet 1b, then the heat dissipation channel 1f is spaced apart on the side of the accommodating cavity 1a away from the light outlet 1b, and the heat dissipation channel 1f has an inlet 1g and an outlet 1h, then the heat exchange medium can flow into the heat dissipation channel 1f through the inlet 1g, and exchange heat with the wall of the heat dissipation channel 1f to take away the heat generated by the operation of the light source component 3, and then flow out through the outlet 1h to achieve heat dissipation of the light source assembly 100, reduce the temperature of the light source assembly 100, and improve the reliability and life of the light source assembly 100, and the heat dissipation of the light source assembly 100 will not affect its lighting function, and at the same time, it is convenient to make the distance between the heat dissipation channel 1f and the light source component 3 relatively close, and the main heat source of the light source assembly 100 is the light source component 3, which is convenient to improve the heat dissipation performance of the light source assembly 100.

[0064] It can be understood that the heat exchange medium may include a gaseous medium and / or a liquid medium, for example, the heat exchange medium is water, or a refrigerant, etc.; the inlet 1g may be one or more, the outlet 1h may be one or more, and the number of inlets 1g may be equal to or different from the number of outlets 1h.

[0065] In some embodiments, Figure 1As shown, the light source assembly 100 also includes a heat dissipation fan 5, and there are multiple inlets 1g, and the multiple inlets 1g are all formed on the side of the heat dissipation channel 1f away from the accommodating cavity 1a, the multiple inlets 1g are arranged at intervals, and a heat dissipation fan 5 is respectively provided at each inlet 1g.

[0066] In convective heat transfer, when the heat exchange medium flows through a stationary wall, due to the viscosity of the fluid, the flow rate of the heat exchange medium is equal to 0 at the place close to the wall. The heat transfer between the wall and the heat exchange medium must pass through this static fluid layer, and the heat transfer in the static fluid is only a heat conduction mechanism. Therefore, the convective heat transfer is equal to the heat conduction of the fluid close to the wall, and its size depends on the thickness of the thermal boundary layer, which is strongly affected by the flow state of the wall fluid, that is, the flow boundary layer. Therefore, the laminar bottom layer is affected by the flow. The thinner the laminar bottom layer, the smaller the thermal resistance, and the greater the convective heat transfer coefficient. It can be seen that in the above scheme of the present application, a heat dissipation fan 5 is set at the inlet 1g on the side of the heat dissipation channel 1f away from the accommodating chamber 1a, and the heat dissipation fan 5 can be constructed to blow toward the side wall of the heat dissipation channel 1f adjacent to the accommodating chamber 1a. The air outlet of the heat dissipation fan 5 can intensify the flow of the fluid layer close to the wall, which is conducive to thinning the thickness of the static fluid layer and improving the heat exchange efficiency.

[0067] It is understandable that the arrangement of the multiple inlets 1g is not specifically limited in this application. For example, the multiple inlets 1g can be arranged at intervals along the second direction, or the multiple inlets 1g can be arranged at intervals along the third direction, or the multiple inlets 1g can be arranged in multiple rows and columns along the second direction and the third direction. Of course, the type of the cooling fan 5 is not specifically limited in this application. For example, the cooling fan 5 can be an axial flow fan, a diagonal flow fan, etc.

[0068] In some embodiments, the shell 1 includes a first body 11 and a second body 12, the first body 11 and the second body 12 are separate parts, the first body 11 has a accommodating cavity 1a, and the second body 12 has a heat dissipation channel 1f. The first body 11 and the second body 12 can be processed and formed separately, and then assembled by assembly means, which is convenient for simplifying the structure of the first body 11 and the second body 12 and improving the processing convenience.

[0069] The first body 11 is provided with mounting openings 1d on both sides in the second direction, the mounting openings 1d are communicated with the accommodating cavity 1a, the light-transmitting member 2 and the light source member 3 are adapted to be pullable and arranged in the accommodating cavity 1a through the mounting openings 1d, and the second body 12 is provided with connecting parts 121 on both ends in the second direction, the connecting parts 121 extend toward the light outlet 1b, and the connecting parts 121 are arranged at intervals on the side of the mounting opening 1d away from the light outlet 1b, and the connecting parts 121 are connected to the first body 11. It can be seen that the setting of the connecting parts 121 facilitates the connection between the first body 11 and the second body 12, and the above connection will not interfere with the heat dissipation channel 1f, and the connecting parts 121 will not affect the disassembly and assembly of the light-transmitting member 2 and the light source member 3.

[0070] Of course, in other embodiments of the present application, the first body 11 and the second body 12 may also be formed as an integral piece.

[0071] The appearance inspection device according to the second aspect of the utility model comprises a carrying component and a light source component 100 according to the first aspect of the utility model, wherein the carrying component is used to carry the part to be inspected, and the carrying component is located on the side where the light outlet 1b of the light source component 100 is located.

[0072] Exemplarily, the light outlet 1b is formed on the lower side of the shell 1, and the supporting component is arranged below the light source component 100. In this case, the part to be detected is placed on the upper surface of the supporting component; or, the light outlet 1b is formed on the upper side of the shell 1, and the supporting component is arranged above the light source component 100. In this case, the part to be detected is placed on the lower surface of the supporting component. For example, the supporting component can fix the part to be detected by adsorption, bonding, etc.

[0073] According to the appearance inspection device of the embodiment of the utility model, by adopting the above-mentioned light source assembly 100, it is convenient to realize reliable illumination of the part to be inspected, which is beneficial to improving the inspection accuracy and inspection efficiency.

[0074] Optionally, the carrying component may include a conveying component, and the conveying component may carry the piece to be detected and convey it along a preset direction, so as to implement detection of the piece to be detected during the conveying process of the piece to be detected.

[0075] Other structures and operations of the appearance inspection device according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0076] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will not further explain various possible combinations. In addition, the various different embodiments of the present application can also be combined arbitrarily, as long as they do not violate the idea of ​​the present application, they should also be regarded as the contents disclosed in the present application.

[0077] In the description of the present utility model, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "axial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0078] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0080] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate 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 claims and their equivalents.

Claims

1. A light source assembly, characterized in that: include: A housing, wherein the housing has a housing cavity, and one side of the housing cavity in the first direction is open to form a light outlet; a light-transmitting member, the light-transmitting member being arranged in the accommodating cavity, at least a portion of the light-transmitting member being opposite to the light outlet, and comprising at least one group of lens groups, each group of the lens groups comprising a plurality of lens units sequentially arranged along a second direction, the refractive index of the lens unit being greater than the refractive index of air, and the second direction being perpendicular to the first direction; A plurality of light source components, each of which is arranged in the accommodating cavity and located on a side of the light-transmitting component away from the light outlet, and emits light through the light outlet, and each of the light source components corresponds to one of the lens units. Among them, a side surface of the lens unit facing away from the corresponding light source is formed as a concave surface concave toward the light source, and the concave surfaces of two adjacent lens units intersect, so that part of the light emitted by the adjacent light source parts and passing through the corresponding lens units converges on the outside of the shell.

2. The light source assembly according to claim 1, characterized in that: The light source assembly is configured to satisfy at least one of the following conditions: Condition A1: On a preset plane, the orthographic projections of two adjacent concave surfaces are tangent to each other, and the preset plane is perpendicular to the axial direction of the light outlet; Condition A2: the lens group is a plurality of groups, and the plurality of lens groups are arranged in sequence along a third direction, and the third direction is perpendicular to the first direction and the second direction respectively; Condition A3: the centers of the plurality of lens units are arranged at equal intervals; Condition A4: the concave surface is a spherical surface, the lens unit is constructed as a double concave lens, a plano-concave lens or a convex-concave lens, and the light source is arranged opposite to the center of the sphere corresponding to the concave surface.

3. The light source assembly according to claim 1, characterized in that: The light-transmitting member is an integrated member. The surface of the light-transmitting member on one side facing away from the light source member is formed as a frosted surface except for the concave curved surface; and / or, A reflective film is provided on a portion of a surface of the light-transmitting member that is away from the light outlet except for a light incident area corresponding to the light source member.

4. The light source assembly according to any one of claims 1 to 3, characterized in that: The shell has a mounting opening formed on at least one of the two sides in the second direction, the mounting opening is communicated with the accommodating cavity, the light source component is fixed on the light-transmitting component, and the light-transmitting component and the light source component are suitable for being pullable in the accommodating cavity through the mounting opening.

5. The light source assembly according to claim 4, characterized in that: The shell has a guide groove on at least one inner wall surface on both sides in the third direction, and a guide protrusion is formed on the light-transmitting member. The guide groove and the guide protrusion are slidably matched along the second direction to guide the light-transmitting member into the accommodating cavity. The third direction is perpendicular to the second direction and the first direction respectively.

6. The light source assembly according to any one of claims 1 to 3, characterized in that: The housing is further formed with a heat dissipation channel which is spaced apart from the accommodating cavity and is located on a side of the accommodating cavity away from the light outlet, and the heat dissipation channel has an inlet and an outlet.

7. The light source assembly according to claim 6, characterized in that: Also includes: A heat dissipation fan, wherein the inlets are multiple and formed on a side of the heat dissipation channel away from the accommodating cavity, and a heat dissipation fan is respectively arranged at each of the inlets.

8. The light source assembly according to claim 6, characterized in that: The housing comprises a first body and a second body, the first body and the second body are separate parts, the first body has the accommodation cavity, and the second body has the heat dissipation channel. The first main body has mounting openings connected to the accommodating cavity on both sides in the second direction, and the light-transmitting component and the light-source component are suitable for being pullable in the accommodating cavity through the mounting openings. The second main body has connecting parts at both ends in the second direction, and the connecting parts extend toward the light outlet and are spaced apart on the side of the mounting opening away from the light outlet, and the connecting parts are connected to the first main body.

9. An appearance inspection device, characterized in that: It comprises a bearing assembly and a light source assembly according to any one of claims 1 to 8, wherein the bearing assembly is used for bearing a part to be detected and is located at a side where the light outlet of the light source assembly is located.

Images