A highlight low-cost ring shadowless light source

Abstract

The utility model discloses a highlight low -cost annular shadowless light source, include: circular shadowless circumference, be provided with reflection structure at the circular inner wall, the diffuser board is connected in the circular shadowless circumference, the shadowless base is fixed to the upper end of the circular shadowless circumference, the top of diffuser board is contacted with the shadowless base below, makes the diffuser board, reflection structure and the sealed light cavity between wireless base, the shadowless circuit board is the annular structure, is provided with the light -emitting area on the shadowless circuit board, the shadowless circuit board is connected on the shadowless base and is placed in the sealed light cavity. The utility model can avoid the appearance of the lamp shadow, has reduced production cost, has solved the phenomenon that the brightness has the stratification of the uniformity, has reduced the light loss simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of detection light source technology, and in particular to a high-brightness, low-cost ring-shaped shadowless light source. Background Technology

[0002] Existing circular shadowless light sources have the following drawbacks: low uniformity, resulting in uneven light distribution and an inability to provide consistent illumination; and noticeable shadows when illuminated, causing interference and severely impacting the accuracy of visual inspection. These issues mean that when customers are conducting light inspections of high-precision parts, such as precision mechanical components or electronic components, the light source often fails to meet stringent accuracy requirements and customer expectations. Furthermore, the manufacturing process of the light guide plate is quite complex, involving multiple delicate processes, including material cutting, thermoforming, and surface treatment, resulting in high processing costs and increasing overall production costs. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a high-brightness, low-cost ring-shaped shadowless light source. This invention can avoid the appearance of lamp shadows, reduce production costs, solve the problems of insufficient uniformity and brightness layering, and reduce light loss.

[0004] To achieve the above objectives, this utility model provides a high-brightness, low-cost ring-shaped shadowless light source, comprising:

[0005] A circular, shadowless perimeter has a reflective structure provided on its inner wall.

[0006] A diffuser plate snapped into the circular, shadowless perimeter;

[0007] A shadowless base is fixed to the upper end of the circular shadowless perimeter, and the bottom of the shadowless base abuts against the top of the diffuser plate, so that a sealed optical cavity is formed between the diffuser plate, the reflective structure and the wireless base.

[0008] The shadowless circuit board has a ring structure and a light-emitting area is provided on it. The shadowless circuit board is snapped onto the shadowless base and placed inside the sealed light cavity.

[0009] Furthermore, the diffuser plate includes a first connecting portion and a diffuser portion. The diffuser portion has a trumpet-shaped structure. The first connecting portion is disposed at the upper end of the diffuser portion and has a circular structure. The bottom end of the diffuser portion is engaged with the circular shadowless circumference, and the first connecting portion abuts against the shadowless base. This achieves the engagement of the diffuser plate, allowing light to be uniformly refracted by the reflective structure within the sealed optical cavity and then diffused through the trumpet-shaped diffuser to achieve uniform light distribution across the entire area, effectively eliminating bright spots and dark areas between the LED beads.

[0010] Furthermore, the bottom end of the circular shadowless circumference is provided with a retaining ring extending horizontally inward. The diffuser plate is placed inside the circular shadowless circumference, so that the interior of the retaining ring supports the diffuser portion. The retaining ring ensures that the diffuser plate is securely installed and tightly fitted with the reflective structure, and the retaining ring and the bottom end of the diffuser plate form a limiting fit to prevent assembly misalignment and improve structural stability.

[0011] Furthermore, the lower end of the shadowless base forms a downwardly extending second connecting portion, and a stepped portion is formed at the lower end of the second connecting portion. The stepped portion is inserted into the first connecting portion, so that the outer wall of the first connecting portion and the outer wall of the stepped portion are in close contact. This further fixes the position of the diffuser plate and ensures its sealing and stability with the shadowless base.

[0012] Furthermore, the thickness of the second connecting part is less than the thickness of the first connecting part. This ensures a tight fit between the stepped part and the first connecting part. Simultaneously, after the stepped part is inserted into the inner wall of the first connecting part, the top surface of the first connecting part abuts against the bottom surface of the second connecting part, and the first connecting part has excess space to form a support platform. This support platform can be used to support the wireless circuit board, thereby increasing the stability of the wireless circuit board installation.

[0013] Furthermore, the inner diameter of the shadowless circuit board matches the inner diameter of the second connecting part, and the shadowless circuit board is sleeved on the outer periphery of the second connecting part to achieve an interference fit. This interference fit installation method ensures a stable and reliable electrical connection between the circuit board and the base, while preventing loosening due to vibration or thermal expansion and contraction.

[0014] Furthermore, the thickness of the diffuser plate is 1.5~3mm, and the diffuser plate is milky white. The use of a milky white, 1.5~3mm thick diffuser plate replaces the original light guide plate, significantly reducing processing costs and avoiding the appearance of light shadows.

[0015] Furthermore, the reflective structure is a specular reflective film. This causes the light path to be reflected on the inner wall and emitted through a diffuser, thus solving the problems of insufficient uniformity and brightness layering, while also reducing light loss.

[0016] Furthermore, the thickness of the reflective structure is 0.2~0.4 mm.

[0017] Furthermore, the shadowless circuit board is equipped with several LED beads, each with a 120° beam angle. Using 120° wide-angle LED beads increases the light dispersion angle, resulting in more uniform light and increased brightness.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention replaces the original light guide plate with a milky white diffuser plate. The diffuser plate's mold design significantly reduces processing costs and effectively avoids light shadow problems. Simultaneously, a reflective structure, a mirror-like reflective film, is set on the inner wall of the circular shadowless perimeter. This allows light to be reflected off the inner wall and then emitted through the diffuser plate, thus solving the problems of insufficient brightness uniformity and layering, while also reducing light loss. Furthermore, the LEDs feature a 120° wide-angle design, increasing the light divergence angle and improving both uniformity and brightness. The diffuser plate angle can also be adjusted according to the customer's usage scenario to adapt to different lighting needs—for example, a more concentrated light angle can be selected for surgical scenarios, while a wider scattering angle can be chosen for examination scenarios, enhancing the flexibility and professionalism of use. Attached Figure Description

[0020] To more clearly illustrate the technology in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a high-brightness, low-cost ring-shaped shadowless light source according to this utility model;

[0022] Figure 2 yes Figure 1 An explosion diagram;

[0023] Figure 3 yes Figure 1 A schematic diagram of the cross-section along AA;

[0024] Figure 4 This is a structural schematic diagram of the shadowless base of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the diffuser plate of this utility model;

[0026] Figure 6 This is a schematic diagram of the optical path of this utility model.

[0027] The diagram includes:

[0028] 1. Circular shadowless perimeter; 11. Reflective structure; 12. Snap-fit ​​ring; 2. Shadowless base; 21. Second connecting part; 22. Third connecting part; 23. Mounting hole; 24. Stepped part; 3. Diffusing plate; 31. First connecting part; 311. Supporting platform; 32. Diffusing part; 4. Shadowless circuit board; 5. Sealed optical cavity. Detailed Implementation

[0029] The technology of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second", such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0032] like Figures 1 to 6 This invention discloses a high-brightness, low-cost ring-shaped shadowless light source, comprising a circular shadowless perimeter 1, a shadowless base 2, a diffuser plate 3, and a shadowless circuit board 4.

[0033] like Figure 1 As shown, in this embodiment, the circular shadowless circumference 1 is a hollow circular ring structure and is made of metal thermally conductive materials such as aluminum, copper or aluminum alloy, which has excellent thermal conductivity and effectively improves the overall heat dissipation efficiency.

[0034] A reflective structure 11 is provided on the inner wall of the circular shadowless circumference 1. This reflective structure 11 is a mirror-reflective film with a thickness of 0.2~0.4mm. Preferably, different thicknesses can be selected according to requirements. In this embodiment, the optimal thickness is 0.3mm, but it can also be set to 0.2mm, 0.25mm, 0.35mm, or 0.4mm. By controlling the thickness of the reflective structure 11, the problems of light energy loss due to excessive thickness or reflection efficiency affected by excessive thinness can be effectively avoided, thereby improving the utilization rate of the light source. The reflective structure 11 is tightly attached and flat, reducing light scattering and energy loss, ensuring that the ring light source achieves a uniform and bright shadowless lighting effect, and further optimizing the lighting quality.

[0035] A snap-fit ​​ring 12 extending horizontally inward is provided at the bottom of the circular shadowless circumference 1 to achieve snap-fit ​​of the diffuser plate 3.

[0036] like Figure 2 , Figure 3 and Figure 5As shown, the diffuser plate 3 in this embodiment is a hollow circular frame structure, mainly including a first connecting part 31 and a diffuser part 32. The diffuser part 32 is a trumpet-shaped structure. The first connecting part 31 is disposed at the upper end of the diffuser part 32. The first connecting part 31 is a ring structure. During installation, the diffuser plate 3 is directly inserted into the circular shadowless circumference 1, so that the bottom end of the diffuser part 32 abuts against the snap ring 12. The bottom end of the diffuser part 32 is snapped into the circular shadowless circumference 1. The snap ring 12 plays a supporting role, ensuring that the diffuser plate 3 is stably installed and maintains a horizontal posture. The diffuser part 32 diffuses outward from its axis in a trumpet shape, which can effectively expand the light emission angle and improve the uniformity of illumination.

[0037] Meanwhile, the thickness of the diffuser plate 3 in this embodiment is 1.5~3mm, and the diffuser plate 3 is milky white. Preferably, the thickness of the diffuser plate 3 is set to 2mm. Of course, 1.5mm, 2.5mm or 3mm can also be selected according to the requirements. In this embodiment, a milky white 2mm thick diffuser plate 3 is used to replace the original light guide plate. The mold of this diffuser plate 3 greatly reduces the processing cost and avoids the appearance of light shadows.

[0038] like Figure 3 and Figure 4 As shown, in this embodiment, the lower end of the shadowless base 2 forms a downwardly extending second connecting part 21, and the upper end of the shadowless base 2 is a stepped third connecting part 22. The third connecting part 22 is detachably connected to the upper end of the circular shadowless circumference 1. Specifically, 23 can be provided on the side wall of the upper end of the third connecting part 22 and the circular shadowless circumference 1, and they can be relatively fixed by screws or the like.

[0039] A stepped portion 24 is formed at the lower end of the second connecting portion 21. When the third connecting portion 22 is fixed relative to the upper end of the circular shadowless circumference 1, the stepped portion 24 is just inserted into the first connecting portion 31, so that the outer wall of the first connecting portion 31 and the outer wall of the stepped portion 24 are in close contact. At the same time, when the stepped portion 24 is embedded in the first connecting portion 31, the lower end face of the second connecting portion 21 abuts against the top end face of the first connecting portion 31, thereby maintaining pressure on the diffuser plate 3, so that the diffuser plate 3 is completely fixed and will not shift.

[0040] Therefore, as follows Figure 3As shown, a sealed light cavity 5 is formed between the diffuser plate 3, the reflective structure 11, and the shadowless base 2. The shadowless circuit board 4 in this embodiment has a ring structure. A light-emitting area is provided on the shadowless circuit board 4. The shadowless circuit board 4 is snapped onto the second connecting part 21 of the shadowless base 2 and placed in the sealed light cavity 5. Its light-emitting area faces the trumpet-shaped structure of the diffuser part 32. The shadowless circuit board 4 is an LED circuit board. Multiple high-brightness LED beads are integrated on the LED circuit board and are arranged in a ring evenly to form a light-emitting area. The light-emitting angle of the LED beads is 120°. The use of 120° large-angle LED beads can increase the light divergence angle, make the light more uniform, and increase the brightness.

[0041] In order to enable the shadowless circuit board 4 to be snapped onto the second connecting part 21, the inner diameter of the shadowless circuit board 4 in this embodiment matches the inner diameter of the second connecting part 21. The shadowless circuit board 4 is sleeved on the outer periphery of the second connecting part 21 to achieve an interference fit. The interference fit installation method ensures that the electrical connection between the circuit board and the base is stable and reliable, while preventing loosening caused by vibration or thermal expansion and contraction.

[0042] In some embodiments, the thickness of the second connecting portion 21 is less than the thickness of the first connecting portion 31. Thus, when the first connecting portion 31 and the second connecting portion 21 come into contact, a supporting platform 311 is formed at the top of the first connecting portion 31. This supporting platform 311 can be used to support the shadowless circuit board 4, preventing the shadowless circuit board 4 from being too close to the diffuser plate 3, and avoiding direct light from causing local overexposure or shadows.

[0043] like Figure 6 As shown, the LED lamp bead of this utility model adopts a 120° large-angle design, which increases the light divergence angle, making the light more uniform and improving the brightness. The light from the lamp bead is reflected by the reflective structure 11 set on the inner wall of the circular shadowless circumference 1, and finally diffused by the diffuser plate 3, thus solving the problems of insufficient brightness uniformity and layering, while reducing light loss. In addition, the light path of this utility model is transmitted within the sealed light cavity 5, which effectively avoids the interference of the external environment on the light path, further improving the lighting quality and energy efficiency.

[0044] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-brightness, low-cost ring-shaped shadowless light source, characterized in that, include: A circular shadowless perimeter (1) has a reflective structure (11) provided on the inner wall of the circle. A diffuser plate (3) is snapped into the circular shadowless perimeter (1); The shadowless base (2) is fixed to the upper end of the circular shadowless perimeter (1). The shadowless base (2) abuts against the top of the diffuser plate (3) to form a sealed optical cavity (5) between the diffuser plate (3), the reflective structure (11) and the wireless base. The shadowless circuit board (4) has a ring structure and a light-emitting area is provided on the shadowless circuit board (4). The shadowless circuit board (4) is snapped onto the shadowless base (2) and placed in the sealed light cavity (5).

2. The high-brightness, low-cost ring-shaped shadowless light source according to claim 1, characterized in that, The diffuser plate (3) includes a first connecting part (31) and a diffuser part (32). The diffuser part (32) has a trumpet-shaped structure. The first connecting part (31) is located at the upper end of the diffuser part (32). The first connecting part (31) has a ring structure. The bottom end of the diffuser part (32) is engaged with the circular shadowless perimeter (1). The first connecting part (31) abuts against the shadowless base (2).

3. The high-brightness, low-cost ring-shaped shadowless light source according to claim 2, characterized in that, The bottom end of the circular shadowless circumference (1) is provided with a snap ring (12) extending horizontally inward. The diffuser plate (3) is housed inside the circular shadowless circumference (1), so that the interior of the snap ring (12) supports the diffuser part (32).

4. The high-brightness, low-cost ring-shaped shadowless light source according to claim 2, characterized in that, The lower end of the shadowless base (2) forms a downwardly extending second connecting part (21), and a step part (24) is formed at the lower end of the second connecting part (21). The step part (24) is inserted into the first connecting part (31), so that the outer wall of the first connecting part (31) and the outer wall of the step part (24) are in close contact.

5. A high-brightness, low-cost ring-shaped shadowless light source according to claim 4, characterized in that, The thickness of the second connecting part (21) is less than the thickness of the first connecting part (31).

6. The high-brightness, low-cost annular shadowless light source according to claim 4, characterized in that, The inner diameter of the shadowless circuit board (4) matches the inner diameter of the second connecting part (21), and the shadowless circuit board (4) is sleeved on the outer periphery of the second connecting part (21) to achieve an interference fit.

7. The high-brightness, low-cost ring-shaped shadowless light source according to claim 1, characterized in that, The thickness of the diffuser plate (3) is 1.5~3mm, and the diffuser plate (3) is a milky white diffuser plate.

8. The high-brightness, low-cost ring-shaped shadowless light source according to claim 1, characterized in that, The reflective structure (11) is a mirror reflective film.

9. A high-brightness, low-cost annular shadowless light source according to claim 8, characterized in that, The thickness of the reflective structure (11) is 0.2~0.4 mm.

10. A high-brightness, low-cost ring-shaped shadowless light source according to claim 1, characterized in that, The shadowless circuit board (4) is provided with a number of LED beads, and the light emission angle of the LED beads is 120°.

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