A light distribution test tool for injection molding debugging of a retroreflector face shield

Abstract

The utility model provides a kind of light distribution inspection tool for reply reflector mask injection molding debugging, including annular target sticker, panel, bottom plate, sleeve and laser emitter, annular target sticker is set to the front of panel, and test point is drawn on annular target sticker;Panel is connected to bottom plate vertically;Sleeve is connected to the back of panel, and laser emitter is inserted into sleeve and is connected with the back of panel, and the center of annular target sticker, sleeve and laser emitter are concentrically arranged;In the inspection process, the incident beam of laser emitter is passed through the center of annular target sticker, and is projected to annular target sticker by detecting workpiece reflection, and the pass rate of reply reflector mask injection molding part is determined according to the condition that reflected beam covers test point, and then injection molding process is adjusted.In addition, the inspection tool can be used in the workshop under normal lighting conditions, and the structure and assembly are simple, thereby improving the portability of the inspection tool and reducing the production cost.

Description

Technical Field

[0001] This utility model relates to the field of inspection fixtures for retroreflectors, and in particular to a light distribution inspection fixture for injection molding and debugging of retroreflector faceplates. Background Technology

[0002] Retroreflectors are optical automotive parts based on the principle of retroreflection optics. Their main functional component is the injection-molded retroreflector mask, whose inner surface is arranged with a dense reflective lattice to provide retroreflection function. Therefore, the function of retroreflectors is directly affected by the molding quality of the injection molded part.

[0003] Currently, the industry typically uses bench testing to inspect assemblies, and the experiments must be conducted in a dark environment. Specifically, the test workpiece is spaced 10-30 meters from the light source, and a photodetector is placed above the light source to measure the intensity of retroreflected light. The test workpiece is usually an assembly and needs to be clamped in a specially designed fixture, which is fixed to a bench turntable. During testing, the turntable can rotate, allowing the photodetector to receive retroreflected light from different angles for measurement.

[0004] Early retroreflectors had simple designs, consisting only of a mask and a lamp housing, and could be assembled using acoustic welding. However, current retroreflectors are mostly designed on top of integrated luminaire assemblies, requiring additional processes before luminaire assembly, which lengthens the time from component delivery to testing.

[0005] In addition, inspection using a test bench requires a dedicated space and supporting equipment, which conventional injection molding workshops do not have. Therefore, it is not possible to simultaneously inspect and debug the injection molded parts of the retroreflector mask.

[0006] Therefore, there is a need for a light distribution detection device for individual injection-molded parts of retroreflector masks. Utility Model Content

[0007] The summary section of this utility model is intended to briefly introduce the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0008] This invention provides a light distribution inspection fixture for injection molding and debugging of a reflector mask, in order to solve the technical problems mentioned in the background section above.

[0009] This utility model discloses a light distribution inspection fixture for injection molding and debugging of a reflector mask, comprising a ring-shaped target sticker, a panel, a base plate, a sleeve, and a laser emitter. The circular target sticker is placed on the front of the panel, and test points are drawn on the circular target sticker. The panel is vertically connected to the base plate; The sleeve is connected to the back of the panel, the laser emitter is inserted into the sleeve and connected to the back of the panel, and the center of the annular target sticker, the sleeve and the laser emitter are concentrically arranged. During the inspection process, the incident beam of the laser emitter passes through the center of the annular target sticker, is reflected by the workpiece and projected onto the annular target sticker, and the pass rate of the retroreflector mask injection molded part is determined based on the coverage of the test point by the reflected beam.

[0010] Optionally, the annular target sticker has a crosshair drawn on it, and a circular hole is provided at the center of the crosshair to allow the incident light beam to pass through.

[0011] Optionally, multiple annular scale lines and annular test lines concentric with the circular hole are provided outside the circular hole.

[0012] Optionally, the annular scale line is a solid line, and the annular test line is a dashed line.

[0013] Optionally, the test point is formed by the intersection of the circular test line and the high and low lines of the cross reference line.

[0014] Optionally, scale value markings are drawn on the outer edge of the circular hole, each annular scale line, and the annular test line.

[0015] Optionally, the back of the panel is provided with a stepped circular hole, and the connecting end of the sleeve is inserted into the countersunk section of the stepped circular hole.

[0016] Optionally, the laser emitter passes through the inner hole of the sleeve and is inserted into the through-hole section of the stepped circular hole.

[0017] Optionally, the laser emitter is cylindrical and has a constant-on mode.

[0018] Optionally, the inner diameter of the countersunk hole section is adapted to the outer diameter of the sleeve; the inner diameter of the sleeve is adapted to the outer diameter of the laser emitter.

[0019] The above embodiments of this utility model have the following beneficial effects: The sleeve connects the panel and houses the laser emitter, thus supporting the laser emitter. Furthermore, the laser emitter is also connected to the panel, allowing the panel to further support the laser emitter. This ensures that the center of the annular target sticker, the sleeve, and the laser emitter are concentrically positioned, guaranteeing the direction of the incident beam, thereby reducing inspection errors and improving the reliability of the inspection fixture.

[0020] This inspection fixture is suitable for the preliminary verification of single injection-molded retroreflector mask parts. It can determine the pass rate of the injection-molded retroreflector mask parts based on the coverage of the test points by the reflected beam. Alternatively, the injection molding process can be adjusted based on the light distribution inspection results during the injection molding production process.

[0021] This inspection fixture can be used in workshops with normal lighting conditions. Its simple structure and assembly improve its portability and reduce manufacturing costs. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of one embodiment of the light distribution inspection fixture for injection molding and debugging of a reflector mask according to the present invention. Figure 2 This is an exploded view of one embodiment of the light distribution inspection fixture for injection molding and debugging of a reflector mask according to the present invention. Figure 3 This is a front view of an embodiment of the light distribution inspection fixture for injection molding and debugging of a reflector mask according to the present invention. Figure 4 This is a rear view of an embodiment of the light distribution inspection fixture for injection molding and debugging of a reflector mask according to the present invention. Figure 5 This is a side view of an embodiment of the light distribution inspection fixture for injection molding and debugging of a reflector mask according to the present invention. Figure 6 A schematic diagram for determining the test points; Figure 7 This is a schematic diagram of the principle of the light distribution inspection fixture for injection molding and debugging of a reflector mask according to this utility model.

[0024] Explanation of reference numerals in the attached figures: 1. Circular target sticker; 11. Crosshair reference line; 12. Circular hole; 13. Circular scale line; 14. Scale value marking; 15. Circular test line; 16. Test point; 2. Panel; 21. Stepped round hole; 3. Base plate; 31. Square groove; 4. Sleeve; 41. Inner hole; 5. Laser emitter. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Please see Figure 1 and Figure 2 The light distribution inspection fixture of this utility model for injection molding debugging of retroreflector masks is mainly applicable to single injection molded parts of retroreflector masks. When producing spare parts for injection molding of retroreflector masks, the light distribution inspection fixture can be used to perform preliminary verification of the plastic parts, thereby ensuring that the plastic parts themselves meet the product functional requirements. This realizes that light distribution inspection and injection molding process debugging can be carried out simultaneously during the injection molding production process.

[0030] The inspection fixture includes a ring-shaped target sticker 1, a panel 2, a base plate 3, a sleeve 4, and a laser emitter 5. The ring-shaped target sticker 1 is affixed to the front of the panel 2, and the panel 2 is vertically connected to the base plate 3. The sleeve 4 is connected to the panel 2, and the laser emitter 5 is inserted into the sleeve 4 and connected to the panel 2, so that the laser beam of the laser emitter 5 passes through the center of the ring-shaped target sticker 1.

[0031] Please see Figure 3 A crosshair reference line 11 is drawn on the annular target sticker 1. A circular hole 12 is formed at the center of the crosshair reference line 11 to allow the incident beam emitted by the laser emitter 5 to pass through. Multiple annular scale lines 13 are concentric with the circular hole 12. Scale value marks 14 are drawn on the outer edge of the circular hole 12 and on each annular scale line 13. As an example, the radius of the circular hole 12 can be 10 mm, and the scale value mark 14 on the outer edge can be 10. From the inside out, the radii of the multiple annular scale lines 13 can be 30 mm, 40 mm, 60 mm, and 80 mm respectively, and the corresponding scale value marks 14 can be 30, 40, 60, 80, and 100 respectively. Of course, those skilled in the art can determine the number of annular scale lines 13 and adaptively adjust the corresponding scale value marks 14 according to the actual situation.

[0032] Furthermore, in addition to the multiple annular scale lines 13, multiple annular test lines 15 concentric with the circular hole 12 are also provided, each annular test line 15 having a scale value mark 14 drawn on it. To distinguish them from the annular scale lines 13, the annular test lines 15 can be drawn as dashed lines.

[0033] The annular target sticker 1 is marked with multiple test points 16, which are formed by the intersection of the annular test line 15 and the high / low lines of the crosshair reference line 11. As an example, there can be two annular test lines 15, with radii of 20.9 mm and 34.5 mm respectively, corresponding to scale markings 14 of 20.9 and 34.5, respectively. The resulting test points 16 correspond to US standard test points 16 and European standard test points 16, respectively. In other words, the formation of test points 16 is related to the radius of the annular test line 15. Text annotations, such as US standard test point, European standard test point, etc., can be added to the test points 16. Those skilled in the art can draw corresponding annular test lines 15 according to the testing standards of different countries or regions, thereby forming corresponding test points 16. Please refer to [link to relevant documentation]. Figure 4 and Figure 5 And continue to refer to Figure 2The aforementioned annular target sticker 1 is affixed to the front of panel 2, and the back of panel 2 is connected to the connecting end of sleeve 4. Specifically, a stepped circular hole 21 is provided on the back of panel 2, and the connecting end of sleeve 4 is inserted into the countersunk section of the stepped circular hole 21. Laser emitter 5 passes through the inner hole 41 of sleeve 4 and is inserted into the through hole section of stepped circular hole 21. That is, the inner diameter of the countersunk section is adapted to the outer diameter of sleeve 4, and the diameter of the inner hole 41 of sleeve 4 is adapted to the outer diameter of laser emitter 5.

[0034] The laser emitter 5 can be a cylindrical laser light source with a constant-on mode, and the light color can be a striking red.

[0035] Taking the European standard test point as an example, it is determined through the following process: The determination is made using test samples, light sources, and light receivers. For example... Figure 6 As shown, the European standard test point simulates the position of the receiver when the observation angle α is 0.33°. When the distance between the test sample and the light source is set to 6m, the distance between the European standard test point and the target light source, converted to millimeters, is 6000×tan0.33°≈34.5mm. Here, the European standard observation angle α=0.33°, therefore the radius of the corresponding ring test line 15 is 34.5mm, which intersects with the high and low lines of the cross reference line 11 to form the European standard test point.

[0036] The US standard observation angle α = 0.20°. Through the above determination process, the radius of the corresponding circular test line is 20.9 mm, which intersects with the high and low lines of the cross baseline 11 to form the US standard test point.

[0037] During assembly, the circular hole 12 and the stepped circular hole 21 are coaxially attached to the front of the panel 2. The sleeve 4 connects the panel and houses the laser emitter 5, thus providing support for the laser emitter 5. In addition, the laser emitter 5 is also connected to the panel 2, so the panel 2 can also provide further support for the laser emitter 5.

[0038] The stepped circular hole 21 is respectively fitted onto the sleeve 4 and the laser emitter 5, so that the circular hole 12, the sleeve 4 and the laser emitter 5 are coaxially arranged, thereby ensuring the output direction of the beam, reducing inspection errors and improving the reliability of the inspection fixture.

[0039] The base plate 3 is provided with a square groove 31. The bottom end of the panel 2 is inserted into the square groove 31 to achieve a perpendicular connection between the panel 2 and the base plate 3, thus supporting the panel 2.

[0040] The following section explains how to use this inspection tool.

[0041] During assembly, the annular target sticker 1 is affixed to the front of the panel 2, ensuring that the circular hole of the annular target sticker 1 is coaxial with the stepped circular hole 21. Next, the panel 2 is inserted into the square groove 31 of the base plate 3 for fixation. Finally, the sleeve 4 is inserted into the countersunk section of the stepped circular hole 21, and the laser emitter 5 is passed through the inner hole 41 of the sleeve 4 and inserted into the through hole section of the stepped circular hole 21, ensuring that the circular hole 12, the stepped circular hole 21, the sleeve 4, and the laser emitter 5 are concentrically arranged.

[0042] During the inspection process, such as Figure 7 As shown, the assembled inspection fixture is placed at an appropriate height, with a distance of 6m between the fixture and the workpiece to be inspected. The workpiece is positioned according to the loading coordinate angle. The laser emitter 5 is turned on, so that the incident beam illuminates the corresponding area of ​​the retroreflector on the surface of the workpiece. The reflected beam is projected onto the surface of the annular target sticker 1. It is checked whether the reflected beam can concentrate and cover the corresponding test point 16, thereby determining whether the process parameters of the retroreflector mask injection molded part are reasonable and whether the product has met the functional requirements. This improves the pass rate of the retroreflector mask injection molded part and thus significantly improves the product quality of retroreflector lamps.

[0043] This inspection fixture can be used in a standard injection molding workshop with adequate lighting, requiring no special site or dark environment. It can be quickly disassembled and is easy to carry after use.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A light distribution inspection fixture for injection molding and debugging of a reflector mask, characterized in that, This includes a ring-shaped target sticker, a panel, a base plate, a sleeve, and a laser emitter. The circular target sticker is placed on the front of the panel, and test points are drawn on the circular target sticker. The panel is vertically connected to the base plate; The sleeve is connected to the back of the panel, the laser emitter is inserted into the sleeve and connected to the back of the panel, and the center of the annular target sticker, the sleeve and the laser emitter are concentrically arranged. During the inspection process, the incident beam of the laser emitter passes through the center of the annular target sticker, is reflected by the workpiece and projected onto the annular target sticker, and the pass rate of the retroreflector mask injection molded part is determined based on the coverage of the test point by the reflected beam.

2. The light distribution inspection fixture for injection molding and debugging of a reflector mask according to claim 1, characterized in that, The ring-shaped target sticker has a crosshair drawn on it, and a circular hole is opened in the center of the crosshair to allow the incident light beam to pass through.

3. The light distribution inspection fixture for injection molding and debugging of a reflector mask according to claim 2, characterized in that, Multiple annular scale lines and annular test lines concentric with the circular hole are provided outside the circular hole.

4. The light distribution inspection fixture for injection molding and debugging of a reflector mask according to claim 3, characterized in that, The circular scale lines are solid lines, and the circular test lines are dashed lines.

5. The light distribution inspection fixture for injection molding and debugging of a reflector mask according to claim 3, characterized in that, The test point is formed by the intersection of the circular test line and the high and low lines of the cross baseline.

6. The light distribution inspection fixture for injection molding and debugging of a reflector mask according to claim 5, characterized in that, The outer edge of the circular hole, each annular scale line, and the annular test line are marked with scale values.

7. The light distribution inspection fixture for injection molding and debugging of a reflector mask according to claim 6, characterized in that, The back of the panel is provided with a stepped circular hole, and the connecting end of the sleeve is inserted into the countersunk section of the stepped circular hole.

8. The light distribution inspection fixture for injection molding and debugging of a reflector mask according to claim 7, characterized in that, The laser emitter passes through the inner hole of the sleeve and is inserted into the through-hole section of the stepped circular hole.

9. The light distribution inspection fixture for injection molding and debugging of a reflector mask according to claim 8, characterized in that, The laser emitter is cylindrical and has a constant-on mode.

10. The light distribution inspection fixture for injection molding and debugging of a reflector mask according to claim 9, characterized in that, The inner diameter of the countersunk hole section is adapted to the outer diameter of the sleeve; the inner diameter of the sleeve is adapted to the outer diameter of the laser emitter.

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