A combined shadowless lamp lens

Abstract

This utility model belongs to the field of optical lens technology, specifically relating to a combined shadowless lamp lens, including a lamp housing with an internal cavity having a top opening. The bottom wall of the cavity has multiple spaced-apart light source mounting holes. A lens cover plate is fixedly attached to the top opening of the lamp housing, and multiple convex lens units are integrally formed on the lens cover plate. Each convex lens unit is directly opposite to one of the light source mounting holes, and the convergence angles of each convex lens unit are different. This utility model uses convex lens units for light distribution, utilizing their gentle refractive light distribution characteristics to generate a uniform light spot with a smooth transition from the center to the edge. By combining convex lens units with multiple convergence angles and converging their optical axes, different uniform sub-spots are superimposed in the target area, thereby forming a highly uniform and shadowless illumination field in the surgical area, ensuring that there is no significant unevenness in the overall illumination area after superposition.

Description

Technical Field

[0001] This utility model belongs to the field of optical lens technology, specifically relating to a combined shadowless lamp lens. Background Technology

[0002] Surgical shadowless lamps are key equipment in medical surgery. Their core function is to provide sufficient, stable and uniform illumination to the surgical area. The basic principle is to use multiple light source modules to project light onto the same target area from different angles. By overlapping multiple light spots, shadows caused by instruments or medical personnel can be effectively eliminated, thereby ensuring a clear and safe surgical field of vision.

[0003] Currently, the mainstream solution is to equip each LED light source with a cup-shaped (or bowl-shaped) lens for light distribution. This design can efficiently collect the light emitted by the LED and converge it at a certain angle, aiming to ensure the central illuminance of the target area while achieving off-axis light spot to complete multi-path overlap.

[0004] However, the above-mentioned cup-shaped lens-based design has inherent optical defects. Its strong light-gathering characteristics lead to a severely uneven energy distribution of the emitted light spot, exhibiting an uneven phenomenon where the central area is extremely bright while the illuminance of the peripheral area is sharply reduced, resulting in a significant "hot spot" effect.

[0005] Therefore, when multiple such uneven light spots are superimposed, although the shadow removal function can be achieved, it is difficult to form a truly smooth and uniform ideal light field in the target area. There is still obvious uneven illumination overall, which affects the doctor's accurate judgment of tissue details and color, and potentially increases the surgical risk. Utility Model Content

[0006] The purpose of this invention is to provide a combined shadowless lamp lens that solves the technical problem in the prior art where the illuminance of a single light spot differs significantly from its center and periphery, resulting in poor uniformity. Consequently, even after multiple light spots are superimposed, the overall lighting area still exhibits uneven brightness and makes it difficult to form a uniform light field.

[0007] This utility model discloses a combined shadowless lamp lens, comprising: The lamp housing has an internal cavity with an opening on the top surface, and the bottom wall of the cavity has multiple spaced-apart light source mounting holes. A lens cover plate is fixedly covered on the top opening of the lamp housing, and multiple convex lens units are integrally formed on the lens cover plate. Each convex lens unit is directly opposite to the light source mounting hole, and the convergence angle of each convex lens unit is different. Among them, the optical axis of the convex lens unit with the smallest converging angle is used as the reference optical axis, and the reference optical axis is perpendicular to the lens cover plate; the optical axes of the other convex lens units are all inclined inward relative to the reference optical axis, so that the light spots emitted by all the convex lens units are superimposed at a preset position.

[0008] This application employs convex lens units for light distribution, which utilize their mild refractive light distribution characteristics to generate uniform light spots with a smooth transition from the center to the edge. This eliminates the "hot spot" effect caused by the forced focusing of traditional cup-shaped lenses, which results in an extremely bright center and a dim periphery. Furthermore, by combining convex lens units with various converging angles and intersecting their optical axes, the convergence and superposition of different uniform sub-spots in the target area are achieved. This creates a highly uniform and shadowless illumination field in the surgical area, ensuring that there is no significant unevenness in the overall illumination area after superposition.

[0009] Based on the above technical solution, the solution of this application can be further improved as follows: Preferably, the convex lens unit includes an incident light surface and an exit light surface disposed opposite to each other on both sides of the lens cover plate, and both the incident light surface and the exit light surface are convex spherical surfaces. By adopting this solution, a standard double convex lens structure is formed, which can realize two efficient and controllable refractions of light, and can more effectively avoid the severe deflection of local light, thereby forming a smooth transition of illuminance from the center to the edge inside the light spot.

[0010] Preferably, the light-incident surface has a plurality of micro-units arranged in an array, the micro-units being diamond-shaped grids with a surface curvature radius of 10mm to 20mm; this scheme can finely scatter and guide the incident light, making the refraction of the light on the light-incident surface form a smooth transition, improving the uniformity of the light distribution, and avoiding excessive concentration or absence of light in certain areas, thereby increasing the uniformity of the light spot.

[0011] Preferably, the distance between adjacent micro-units is 0.5mm to 1mm; this solution avoids mutual interference and ensures the refraction effect.

[0012] Preferably, a plurality of mutually cooperating positioning structures are provided between the lamp housing and the lens cover, and the plurality of positioning structures are distributed at intervals around the accommodating cavity; by adopting this solution, precise alignment and fixation are achieved by using multi-point cooperation, effectively preventing misalignment and rotation, and ensuring stable lighting effect and accurate light path.

[0013] Preferably, the positioning structure includes a limiting groove on the lamp housing and a limiting protrusion on the lens cover plate. The limiting groove and the limiting protrusion correspond one-to-one and are inserted into each other. By adopting this solution, the insertion and connection can achieve fast and accurate alignment and firm connection, effectively constrain displacement in all directions, and ensure the stability of the optical path.

[0014] Preferably, it includes: Multiple positioning blocks are fixedly installed on the bottom surface of the lamp housing. This solution provides a reference for quick and precise installation and fixation with the external structure, ensuring that the shadowless lamp can always be accurately aligned with the preset surgical area and maintain the best effect of light spot superposition.

[0015] Preferably, the top surface of the lens cover plate has a first mounting through hole at its center, and the bottom wall of the accommodating cavity has a second mounting through hole corresponding to the first mounting through hole; this solution facilitates the installation and fixing of the lens and ensures the stability and accuracy of the installation.

[0016] Through the above technical solution, this utility model achieves the following beneficial effects: 1. This application uses a convex lens unit for light distribution, which can generate a uniform light spot with a smooth transition from the center to the edge by utilizing its mild refractive light distribution characteristics. This eliminates the "hot spot" effect caused by the forced light focusing of traditional cup-shaped lenses, which results in an extremely bright center and a dark periphery. Furthermore, by combining convex lens units with multiple convergence angles and making their optical axes intersect, the convergence and superposition of different uniform sub-spots in the target area are achieved, thereby forming a highly uniform and shadowless illumination field in the surgical area, so that there is no obvious uneven illumination in the overall illumination area after superposition. 2. The convex lens unit of this application includes an incident surface and an exit surface that are positioned opposite each other on both sides of the lens cover plate. Both the incident surface and the exit surface are convex spherical surfaces, which constitute a standard biconvex lens structure. This structure can achieve two efficient and controllable refractions of light, thereby projecting light out in a smooth and uniform manner. Compared with a single convex surface design, it can more effectively avoid the severe deflection of light in local areas, thereby forming a smooth transition of illuminance from the center to the edge within the light spot, fundamentally suppressing the generation of sharp "hot spots". Attached Figure Description

[0017] 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.

[0018] Figure 1This is a perspective view of the combined shadowless lamp lens described in a specific embodiment of this application; Figure 2 for Figure 1 The diagram shows the structure of the combined shadowless lamp lens. Figure 3 for Figure 2 Schematic diagram of the structure of the middle lens cover plate; Figure 4 for Figure 2 Schematic diagram of the structure of the central lamp housing; Figure 5 for Figure 1 The top view of the combined shadowless lamp lens shown; Figure 6 for Figure 5 Schematic diagram of the cross section at point AA; Figure 7 for Figure 1 The diagram shows the illumination of the combined shadowless lamp lens. Explanation of reference numerals in the attached figures: 1. Lamp housing; 101. Receiving cavity; 102. Light source mounting hole; 103. Second mounting through hole; 2. Lens cover plate; 201. Convex lens unit; 2011. Light-incident surface; 20111. Micro-unit; 2012. Light-out surface; 202. First mounting through hole; 3. Positioning structure; 301. Limiting groove; 302. Limiting protrusion; 4. Positioning block. Detailed Implementation

[0019] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0020] 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 technical features indicated. Therefore, a feature defined as “first” or “second” may explicitly or implicitly include one or more of the stated features.

[0021] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" 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 direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0023] Example: like Figures 1-5 As shown in the figure, this application discloses a combined shadowless lamp lens, which is used to provide a smooth and uniform ideal light field for the surgical area, so that there is no obvious unevenness in the overall illumination area after superposition. Its specific structure includes: lamp housing 1 and lens cover plate 2.

[0024] The lamp housing 1 serves as the basic support structure and skeleton, providing an installation platform and protection for the lens cover plate 2. It has an internal cavity 101 with an opening on the top surface, which is used to accommodate and fix the LED light source. The bottom wall of the cavity 101 is provided with multiple spaced light source mounting holes 102, which are used to precisely install and fix individual LED light sources, thereby playing a precise positioning role and ensuring that each LED light source can be precisely aligned with the corresponding convex lens unit 201 above, thus ensuring the consistency and accuracy of optical performance.

[0025] The lens cover plate 2 is fixedly covered on the top opening of the lamp housing 1, and multiple convex lens units 201 are integrally formed on the lens cover plate 2. Each convex lens unit 201 is directly opposite to the light source mounting hole 102, and the convergence angle of each convex lens unit 201 is different.

[0026] Understandably, by integrating all the convex lens units 201 through one-piece molding, the assembly process is greatly simplified, the accuracy of the relative positions between each convex lens unit 201 is ensured, the cumulative error caused by installing them one by one is avoided, the consistency and reliability of the product are improved, and the number of parts and the assembly cost and complexity are reduced.

[0027] It should be noted that the convergence angle refers to the angle between the light rays and the optical axis of the lens after refraction. The smaller the angle, the smaller the resulting spot size. Therefore, by designing lenses with various convergence angles, different illumination ranges can be illuminated in different applications.

[0028] It should be noted that the lens cover 2 can be made of optical-grade plastic with high light transmittance and heat aging resistance to ensure efficient light transmission and long-term stable operation.

[0029] Among them, the optical axis of the convex lens unit 201 with the smallest converging angle is used as the reference optical axis, which is perpendicular to the lens cover plate 2; the optical axes of the other convex lens units 201 are all tilted inward relative to the reference optical axis, so that the light spots emitted by all convex lens units 201 are superimposed at a preset position.

[0030] It is understandable that, taking the optical axis of the convex lens unit 201 with the smallest converging angle as the reference optical axis, and the reference optical axis being perpendicular to the lens cover plate 2, means that the light spot formed by the convex lens unit 201 will be perpendicularly irradiated onto the target area. Therefore, it will not be deformed due to off-axis, thus presenting a regular shape, and the outer aperture can form a near-circular effect, thereby improving the uniformity of illumination. Since the light spot size formed by the other convex lens units 201 is relatively large, the light spot deformation caused by its slight off-axis design is not obvious, so the large aperture formed is also relatively regular and the shape is approximately circular.

[0031] Understandably, the optical axes of the remaining convex lens units 201 are all tilted inward relative to the reference optical axis, so that the light spots emitted by all the convex lens units 201 are superimposed at the preset position. This is intended to ensure that no matter how different lenses with different convergence angles are combined to light up (i.e., the size and illuminance of the light spot are adjusted), the central area of ​​all the light spots is "locked" in the same position, so that the core of the illumination area will not drift with the mode switching, and the doctor does not need to repeatedly adjust the position of the lamp head.

[0032] It is important to emphasize that traditional cup-shaped lenses primarily rely on reflection (inner wall) and refraction (top) to force light to converge within a relatively small angle. This forced convergence characteristic pulls most of the light back to the vicinity of the central optical axis, resulting in a light spot with extremely high brightness at the center and a sharp decrease in illuminance from the center to the edge. In contrast, the convex lens unit 201 of this application guides and redistributes light solely through refraction. It does not completely pull large-angle light back to the center, but instead forms a light spot with a smooth, gradual change in brightness from the center to the edge. The central area of ​​this light spot is bright, but it does not excessively converge to form a glaring extreme. The illuminance in the outer area gradually decreases, forming a soft transition zone without a clear boundary.

[0033] For example, the light spots emitted by all the convex lens units 201 are superimposed at a distance of one meter to meet the actual working conditions of surgical lighting, but it is not limited to this and can be adjusted according to the application without limitation.

[0034] For example, there are three convex lens units 201 in total, arranged in an equilateral triangle layout, which has the advantages of compact structure and easy installation; but it is not limited to this, and there may be four, five or more, without specific limitation.

[0035] This invention employs a convex lens unit 201 for light distribution, which utilizes its gentle refractive light distribution characteristics to generate a uniform light spot with a smooth transition from the center to the edge. This eliminates the "hot spot" effect caused by the forced light focusing of traditional cup-shaped lenses, which results in an extremely bright center and a dim periphery. Furthermore, by combining convex lens units 201 with multiple converging angles and intersecting their optical axes, the convergence and superposition of different uniform sub-spots in the target area are achieved. This creates a highly uniform and shadowless illumination field in the surgical area, ensuring that there is no significant unevenness in the overall illumination area after superposition.

[0036] In some embodiments, such as Figure 6 As shown, the convex lens unit 201 includes an incident light surface 2011 and an exit light surface 2012 disposed opposite to each other on both sides of the lens cover plate 2, and both the incident light surface 2011 and the exit light surface 2012 are convex spherical surfaces.

[0037] The above design constitutes a standard biconvex lens structure, which can achieve two efficient and controllable refractions of light, thus projecting light out in a smooth and uniform manner. Compared with the single convex surface design, it can more effectively avoid the drastic deflection of light in local areas, thereby forming a smooth transition of illuminance from the center to the edge within the light spot, fundamentally suppressing the generation of sharp "hot spots".

[0038] Based on the above embodiments, such as Figure 3 As shown, the light-incident surface 2011 has several micro-units 20111 arranged in an array around each other. The micro-units 20111 have a diamond-shaped grid pattern and the radius of curvature of their surfaces is 10mm to 20mm.

[0039] Through the above design, the incident light can be finely scattered and guided, so that the refraction of the light on the incident surface 2011 forms a smooth transition, which improves the uniformity of the light distribution and avoids the excessive concentration or absence of light in certain areas, thereby increasing the uniformity of the light spot.

[0040] In this embodiment, the distance between adjacent micro-units 20111 is 0.5mm to 1mm, which avoids mutual interference and ensures the refraction effect.

[0041] In some embodiments, such as Figure 2 As shown, a plurality of mutually cooperating positioning structures 3 are provided between the lamp housing 1 and the lens cover plate 2, and the plurality of positioning structures 3 are distributed at intervals around the accommodating cavity 101.

[0042] Through the above design, the lamp housing 1 and the lens cover plate 2 can be precisely aligned and fixed by multiple points, effectively preventing misalignment and rotation, and ensuring that each convex lens unit 201 and the LED light source can be accurately aligned for a long time, thereby ensuring accurate light path and stable lighting effect.

[0043] In this implementation, such as Figures 2-4 and Figure 6 As shown, the positioning structure 3 includes a limiting groove 301 on the lamp housing 1 and a limiting protrusion 302 on the lens cover plate 2. The limiting groove 301 and the limiting protrusion 302 correspond to each other and are inserted into each other.

[0044] For example, the lamp housing 1 and the lens cover plate 2 can be fixed by ultrasonic welding, which achieves an efficient and firm sealing connection. The welding process requires no additional materials and has minimal vibration, which can avoid displacement or damage to the internal precision optical structure, ensure the long-term stability of the structure, and ensure that the alignment accuracy between each convex lens unit 201 and the LED light source is not affected.

[0045] The design of the above-mentioned positioning structure 3, through plug-in connection, enables the lamp housing 1 and lens cover plate 2 to be quickly and accurately aligned and firmly connected, effectively constraining displacement in all directions, ensuring that the optical components maintain accurate alignment over a long period of time, and guaranteeing the stability of the optical path.

[0046] In some embodiments, such as Figure 2 As shown, it includes: multiple positioning blocks 4, which are fixed on the bottom surface of the lamp housing 1, providing a reference for quick and accurate installation and fixation with the external structure, ensuring the stability of the shadowless lamp in the final use position, so that the shadowless lamp can always be accurately aligned with the preset surgical area and maintain the best effect of light spot superposition.

[0047] In some embodiments, such as Figure 2 As shown, a first mounting through hole 202 is provided at the center of the top surface of the lens cover plate 2, which is preferably a second-order through hole; a second mounting through hole 103 corresponding to the first mounting through hole 202 is provided on the bottom wall of the accommodating cavity 101, which facilitates the installation and fixing of the lens and ensures the stability and accuracy of the installation.

[0048] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not 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. 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, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A combined shadowless lamp lens, characterized in that, include: The lamp housing has an internal cavity with an opening on the top surface, and the bottom wall of the cavity has multiple spaced-apart light source mounting holes. A lens cover plate is fixedly covered on the top opening of the lamp housing, and multiple convex lens units are integrally formed on the lens cover plate. Each convex lens unit is directly opposite to the light source mounting hole, and the convergence angle of each convex lens unit is different. Among them, the optical axis of the convex lens unit with the smallest converging angle is used as the reference optical axis, and the reference optical axis is perpendicular to the lens cover plate; the optical axes of the other convex lens units are all inclined inward relative to the reference optical axis, so that the light spots emitted by all the convex lens units are superimposed at a preset position.

2. The combined shadowless lamp lens according to claim 1, characterized in that, The convex lens unit includes an incident light surface and an exit light surface that are disposed opposite each other on both sides of the lens cover plate, and both the incident light surface and the exit light surface are convex spherical surfaces.

3. The combined shadowless lamp lens according to claim 2, characterized in that, The light-incident surface has a number of micro-units arranged in an array, the micro-units being diamond-shaped grids with a surface curvature radius of 10mm to 20mm.

4. The combined shadowless lamp lens according to claim 3, characterized in that, The distance between adjacent micro-units (20111) is 0.5mm to 1mm.

5. The combined shadowless lamp lens according to claim 1, characterized in that, The lamp housing and the lens cover are provided with a plurality of mutually cooperating positioning structures, and the plurality of positioning structures are distributed at intervals around the accommodating cavity.

6. The combined shadowless lamp lens according to claim 5, characterized in that, The positioning structure includes a limiting groove on the lamp housing and a limiting protrusion on the lens cover plate. The limiting groove and the limiting protrusion correspond one-to-one and are inserted into each other.

7. The combined shadowless lamp lens according to claim 1, characterized in that, include: Multiple positioning blocks are fixedly mounted on the bottom surface of the lamp housing.

8. The combined shadowless lamp lens according to claim 1, characterized in that, The lens cover plate has a first mounting through hole at the center of its top surface, and the accommodating cavity has a second mounting through hole corresponding to the first mounting through hole on its bottom wall.

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