Plane coaxial light source

Abstract

The utility model relates to the technical field of light sources, in particular to a plane coaxial light source which comprises a frame and a cover plate, a rectangular light guide plate is arranged between the frame and the cover plate, lamp bead patches are arranged on the periphery of the light guide plate, chamfering notches are formed in the four corners of the light guide plate respectively, and protruding triangular positioning plates are arranged at the positions, corresponding to the chamfering notches, in the frame. The protruding height of the triangular positioning plate is smaller than the thickness of the light guide plate. The chamfering notches are formed in the four corners of the light guide plate respectively and matched with the triangular positioning plates arranged at the corresponding positions in the frame, the protruding height of the triangular positioning plates is smaller than the thickness of the light guide plate, the light guide plate is positioned, meanwhile, the side edges of the light guide plate are prevented from being shielded, and dark corners can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to light source technical field especially relates to a plane coaxial light source. BACKGROUND

[0002] Now, China is becoming one of the most active regions in the world machine vision development, and the application range covers industry, agriculture, medicine, military, aerospace, weather, astronomy, public security, transportation, safety, scientific research and other industries of national economy.

[0003] The core of machine vision system is image acquisition and processing, all information is derived from the image, and the quality of the image itself is extremely critical to the whole vision system.

[0004] Machine vision image acquisition needs to use industrial camera to shoot high-quality images of the measured object, and the lighting condition on the measured object determines the quality of the collected image, thereby determining the accuracy of the detection result. Figure 6 As shown in the drawing, the traditional light source vertically irradiates the object, which will affect the camera path and cause the image of the photographed object to produce pattern deviation or light and dark difference. Invention content

[0005] The utility model solves the technical problem that exists above, provides a plane coaxial light source, adopts the chamfer gap that is equipped with in the four corners of light guide plate, cooperation frame inside the triangular positioning plate that sets up in the corresponding position, realizes light guide plate positioning while still avoids the occlusion to light guide plate side, solves the problem that dark corner light is not uniform.

[0006] To solve the above technical problems, the technical scheme adopted by the utility model is: a plane coaxial light source, including frame and cover plate, the rectangular light guide plate is equipped between frame and cover plate, the four corners of light guide plate are equipped with lamp pearl patch, the four corners of light guide plate are equipped with chamfer gap, the position of frame inside corresponding chamfer gap is equipped with the convex triangular positioning plate, and the convex height of triangular positioning plate is less than the thickness of light guide plate.

[0007] Further optimize the technical scheme, two planes of light guide plate are equipped with glass plate respectively, and the light guide plate and the two glass plates on both sides are clamped between the cover plate and the frame.

[0008] Further optimize the technical scheme, the size of the light guide plate in length and width direction is greater than the size of the glass plate in corresponding direction, the inner side of the frame and the cover plate is respectively provided with lower clamping strip and upper clamping strip, and the light guide plate is clamped between the upper clamping strip and the lower clamping strip.

[0009] Further optimize the technical scheme, the side of the lamp bead patch away from the light guide plate is provided with insulating heat-conducting silicone paste, and the lamp bead patch is adhered to the inner side wall of the frame through the heat-conducting silicone paste.

[0010] Further optimize the technical scheme, the lamp bead patch is provided with an inner groove, and a row of LED light-emitting patches is arranged on the upper side and the lower side of the inner groove respectively, and the opening of the inner groove is directed to the side of the light guide plate.

[0011] Compared with the prior art, the utility model has the advantages that: 1. The four corners of the light guide plate are respectively provided with chamfered notches, and the triangular positioning plates are arranged at the corresponding positions in the frame, the height of the convex of the triangular positioning plate is less than the thickness of the light guide plate, the positioning of the light guide plate is realized, and the side edge of the light guide plate is also avoided from being shielded, so that the appearance of the dark corner can be effectively avoided; 2. The heat-conducting silicone paste is arranged to improve the heat dissipation effect of the lamp bead patch and achieve the purpose of insulation; 3. The two rows of LED light-emitting patches can accommodate more LED light-emitting diodes, the high irradiation power of the light source is further improved, the light emission is more uniform, and different color or color temperature LED light-emitting diodes can be arranged, so that the application range of the light source is wider. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is an explosion schematic view of a plane coaxial light source embodiment one;

[0013] Figure 2 It is a sectional view of the plane coaxial light source embodiment one at the frame;

[0014] Figure 3 It is a schematic view of the internal structure of the plane coaxial light source embodiment one after removing the cover plate;

[0015] Figure 4 It is a schematic view of the structure of the light guide plate at the corner during installation;

[0016] Figure 5 It is a sectional view of a plane coaxial light source embodiment two at the lamp bead patch;

[0017] Figure 6 It is a schematic view of the plane coaxial light source in use.

[0018] In the drawing: 1, frame; 11, lower clamping strip; 12, triangular positioning plate; 2, light guide plate; 21, chamfered notch; 3, glass plate; 4, cover plate; 41, upper clamping strip; 5, lamp bead patch; 50, inner groove; 501, LED light-emitting patch; 51, heat-conducting silicone paste. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. It should be understood that the description is only exemplary and is not intended to limit the scope of the present application. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0020] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. in the present application indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In combination Figures 1 to 4 As shown in the drawings, a planar coaxial light source includes a flat frame-shaped cover plate 4 and a frame 1 with an "L" cross-section. The frame 1 has a sharp edge chamfer, and the surface is required to be scratch-free and treated with sandblasting 120#. The frame 1 is made of aluminum alloy material and is treated with black anodizing. A rectangular light guide plate 2 is provided between the frame 1 and the cover plate 4. The light guide plate 2 is made of a PV plate. Two glass plates 3 are respectively provided at two planes of the light guide plate 2. The light guide plate 2 and the two glass plates 3 on both sides are clamped between the cover plate 4 and the frame 1. The dimensions of the light guide plate 2 in the length and width directions are greater than the corresponding dimensions of the glass plates 3. The inner sides of the frame 1 and the cover plate 4 opposite to each other are respectively provided with a lower clamping strip 11 and an upper clamping strip 41. The light guide plate 2 is clamped between the upper clamping strip 41 and the lower clamping strip 11. The upper clamping strip 41 and the lower clamping strip 11 are respectively wrapped around the outer sides of the corresponding glass plates 3 and limit the corresponding glass plates 3. The rectangular light guide plate 2 is respectively provided with a chamfered corner notch 21 at four corners. The frame 1 is provided with a protruding triangular positioning plate 12 at a position corresponding to the chamfered corner notch 21. The protruding height of the triangular positioning plate 12 is less than the thickness of the light guide plate 2.

[0022] The light guide plate 2 is provided with a lamp bead patch 5 around the periphery. The lamp bead patch 5 is provided with an insulating heat-conducting silicone paste 51 on the side away from the light guide plate 2. The lamp bead patch 5 is adhered to the inner side wall of the frame 1 through the heat-conducting silicone paste 51. The number of lamp beads can be determined according to the required light intensity of the scene. The light source can be set to different colors according to the requirements.

[0023] When assembled, the mounting fixed part is coated with heat-conducting silica gel to ensure good heat dissipation performance of the light source, the lamp bead patch 5 is adhered to the inner wall of the frame 1 through the insulating heat-conducting silica gel, and then the glass plate 3 at the bottom and the light guide plate 2 in the middle are sequentially placed, the chamfered notch 21 of the light guide plate 2 is clamped between the three triangular positioning plates 12, and the positioning of the light guide plate 2 is realized through the four triangular positioning plates 12 to avoid displacement of the light guide plate 2. Since the height of the triangular positioning plate 12 is less than the thickness of the light guide plate 2, the triangular positioning plate 12 will not completely block the chamfered notch 21 of the light guide plate 2, and the light emitted by the lamp bead patch 5 can still enter the light guide plate 2 through the chamfered notch 21, which not only can effectively avoid the appearance of the dark corner of the light guide plate 2, but also can improve the stability of the fixing of the light guide plate 2. The cover plate 4 is fixed on the opening side of the frame 1 through screws, and the light guide plate 2 can be clamped. The overall size of the light source can be flexibly designed according to actual needs.

[0024] Embodiment two: a planar coaxial light source, in combination Figure 5 As shown in the drawings, different from embodiment one, the lamp bead patch 5 is provided with a 90-degree inner groove 50, and one row of LED light emitting patches 501 is arranged on the upper and lower sides of the inner groove 50 respectively, and the opening of the inner groove 50 is directed to one side of the light guide plate 2. When used, the two rows of LED light emitting patches 501 can accommodate more LED light emitting diodes, further improve the high irradiation power of the light source, make the light emission more uniform, and also can set LED light emitting diodes of different colors or color temperatures, so that the application range of the light source is wider.

[0025] The control mode of the utility model is automatically controlled through the controller, and the control circuit of the controller can be realized through simple programming of the person skilled in the art, which belongs to the public knowledge in the field, so the control mode and circuit connection of the utility model will not be explained in detail.

[0026] It should be understood that the above specific embodiments of the utility model are only used for example or explanation of the principle of the utility model, and do not constitute the limitation of the utility model. Therefore, any modification, equivalent replacement, improvement, etc. made without deviating from the spirit and scope of the utility model shall be included in the protection scope of the utility model. In addition, the appended claims of the utility model are intended to cover all changes and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.

Claims

1. A planar coaxial light source, comprising a frame (1) and a cover plate (4), wherein a rectangular light guide plate (2) is provided between the frame (1) and the cover plate (4), and LED chip patches (5) are provided around the perimeter of the light guide plate (2), characterized in that: The light guide plate (2) has chamfered notches (21) at its four corners. A protruding triangular positioning plate (12) is provided in the frame (1) at the position corresponding to the chamfered notches (21). The protrusion height of the triangular positioning plate (12) is less than the thickness of the light guide plate (2).

2. The planar coaxial light source according to claim 1, characterized in that: The light guide plate (2) has glass plates (3) on its two planes respectively. The light guide plate (2) and the two glass plates (3) on both sides are sandwiched between the cover plate (4) and the frame (1).

3. A planar coaxial light source according to claim 2, characterized in that: The dimensions of the light guide plate (2) in the length and width directions are larger than the dimensions of the glass plate (3) in the corresponding directions. The inner sides of the frame (1) and the cover plate (4) are respectively provided with a lower clamping strip (11) and an upper clamping strip (41). The light guide plate (2) is clamped between the upper clamping strip (41) and the lower clamping strip (11).

4. A planar coaxial light source according to claim 1, characterized in that: The LED chip patch (5) is provided with an insulating thermally conductive silicone grease patch (51) on the side away from the light guide plate (2), and the LED chip patch (5) is bonded to the inner wall of the frame (1) by the thermally conductive silicone grease patch (51).

5. A planar coaxial light source according to claim 4, characterized in that: The lamp bead patch (5) has an inner groove (50), and a row of LED light-emitting patches (501) is provided on the upper and lower sides of the inner groove (50). The opening of the inner groove (50) faces the side of the light guide plate (2).

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