Structure for enhancing projection definition and projection handle and projection umbrella thereof

Abstract

The utility model provides a structure for enhancing projection definition and a projection handle and a projection umbrella thereof, a power supply module provides a power supply for a light-emitting module and emits light, a first lens and a second lens which are plano-convex lenses are arranged between the light-emitting module and a film, and the convex surfaces of the first lens and the second lens are oppositely arranged. Light is converged by the second lens and deflected by the first lens in sequence to form light rays with enhanced convergence, projection is realized by matching with the film and the lens group, the projection distance is increased, and the projection definition is effectively enhanced.

Description

Technical Field

[0001] This utility model relates to the field of umbrellas, and in particular to a structure for enhancing projection clarity, its projection handle, and a projection umbrella. Background Technology

[0002] As an everyday tool for sun and rain protection, the core function of umbrellas has long been physical protection since their invention. Traditional umbrellas achieve basic practicality through waterproof canopy materials and frame support. Although improvements such as folding umbrellas and reverse umbrellas have emerged, their function has always been limited to passive protection. Information transmission relies on printed patterns on the canopy or simple lighting decorations, lacking room for dynamic and interactive upgrades.

[0003] The projection handle, building upon the traditional umbrella's function of providing sun and rain protection, incorporates a projection module within the handle. Through an optical system, it projects pre-set artistic images or customized logos onto external surfaces such as the ground and walls, creating light and shadow effects. The umbrella surface can maintain a simple design, while the projected content can be flexibly switched according to the needs of the scene—for example, displaying brand logos in commercial settings or presenting abstract patterns or poetic images in art spaces. This design retains the umbrella's portability and practicality while expanding its possibilities as a mobile display medium, suitable for brand events, art installations, street performances, and other scenarios, realizing the function of a "walking visual medium."

[0004] For example, a rechargeable projection light umbrella handle with patent publication number CN206462539U includes an umbrella canopy, an umbrella pole, and a handle. The handle is located at one end of the umbrella pole, and the umbrella canopy is located on the frame of the umbrella pole. The handle includes an upper shell, a lamp body, and a lower shell. The upper shell is connected to the umbrella pole, and the lower shell is connected to the upper shell. The lamp body is located in the space formed by the upper shell and the lower shell. The lamp body includes a battery mounting part, a circuit board, a lamp head, and a lens mounting cylinder. The lamp head is fixed on the circuit board, which is located between the battery mounting part and the lens mounting cylinder. A plane lens and a first convex lens are arranged from top to bottom inside the lens mounting cylinder. The plane lens has a lens pattern. The handle has a first control switch for controlling the lamp head to turn on and off. A light-transmitting hole is provided at the bottom of the lower shell, and the light emitted from the lamp head passes through the plane lens and the first convex lens and is transmitted through the light-transmitting hole.

[0005] For example, the applicant's recently granted utility model patent, publication number CN221785539U, discloses a detachable projection handle, which includes: a sleeve, inside which is a mounting bracket, inside which is a battery, and at one end of the mounting bracket is a power-conducting component, at the other end of which is a bulb body; a connecting cover, which is fitted onto the surface of the mounting bracket; and a connecting seat, which is threaded to one end of the sleeve, and at one end of the mounting bracket is a switch. This utility model provides a detachable projection handle, in which the mounting bracket, mounting bracket, connecting cover, and connecting seat, which contain the power-conducting component, battery, and bulb body, work together within the sleeve. This allows the entire device to be detached from a straight-handled umbrella for nighttime illumination when used alone.

[0006] The aforementioned technical solutions can all project personalized patterns onto a plane. However, since the light source directly illuminates the film, and the film is projected using 2-3 convex lenses at the rear end, the applicant found that this structure can only present a clear image at a relatively close projection distance. When a larger projected image is needed and the distance between the projection end of the handle and the imaging plane is increased, the image gradually becomes blurry until it becomes unrecognizable. This shortcoming limits the use of existing projection handles and cannot meet the personalized needs of users. Utility Model Content

[0007] Therefore, there is a need to provide a structure and its projection handle and projection umbrella to enhance projection clarity, and to solve the problem that the existing technology can only present a clear image at a relatively close projection distance. When a larger projection image is needed and the distance between the projection end of the handle and the imaging plane is increased, the image will gradually become blurry until it becomes unrecognizable. This shortcoming makes the use of existing projection handles relatively limited and unable to meet the personalized needs of users.

[0008] To achieve the above objectives, this utility model provides a structure for enhancing projection clarity: a sleeve for hand gripping, with a projection hole at the front end;

[0009] The sleeve contains, from front to back, a lens group, a film, a first lens, a second lens, a light-emitting module, and a circuit board arranged in sequence at intervals. The optical axes of the lens group, the first lens, and the second lens are collinear.

[0010] The circuit includes a power supply module and a switch module, wherein the light-emitting module and the switch module are electrically connected to the circuit board, and the circuit board is electrically connected to the power supply module.

[0011] Both the first lens and the second lens are plano-convex lenses, and their convex surfaces face each other.

[0012] Furthermore, the aperture of the first lens is not smaller than the aperture of the second lens.

[0013] Furthermore, the distance between the convex vertices of the first lens and the second lens is 3±1mm.

[0014] Furthermore,

[0015] The planar diameter of the first lens is 16.5 ± 0.5 mm; and / or

[0016] The plane diameter of the second lens is 15.5 ± 0.5 mm.

[0017] Furthermore, the lens group includes multiple biconvex lenses.

[0018] Furthermore, the radius of curvature of the anterior convex surface of the biconvex lens is smaller than the radius of curvature of the posterior convex surface; and / or the lens group consists of three biconvex lenses arranged at equal intervals.

[0019] Furthermore,

[0020] The spacing between the biconvex lenses is 2±1mm; and / or

[0021] The distance between the film and the lens group is 4±1mm.

[0022] Furthermore, the sleeve has an opening on its side wall for inserting the film.

[0023] The present invention also provides a projection handle, wherein the handle is provided with a structure for enhancing projection clarity as described in any of the preceding technical solutions.

[0024] The present invention also provides a projection umbrella, including an umbrella body and a projection handle as described above.

[0025] Unlike existing technologies, the above technical solution provides power to the light-emitting module and enables it to emit light through a power supply module. A first lens and a second lens, both of which are plano-convex lenses, are provided between the light-emitting module and the film. The convex surfaces of the first lens and the second lens are arranged opposite each other. The light passes through the converging of the second lens and the deflection of the first lens in sequence to form a beam of light that is enhanced and converged. This beam, together with the film and the lens group, achieves projection, increases the projection distance, and effectively enhances the projection clarity. Attached Figure Description

[0026] Figure 1 A cross-sectional view of the structure for enhancing projection clarity as described in the specific embodiment;

[0027] Figure 2 This is a schematic diagram of a lens group with three lenses, as described in a specific embodiment.

[0028] Figure 3 This is a schematic diagram of the structure of the first lens, the second lens, the light-emitting module, and the circuit board in a specific embodiment;

[0029] Figure 4 This is a schematic diagram of the structure of the lens group, film, first lens, second lens, light-emitting module, and circuit board described in the specific embodiment;

[0030] Figure 5 This is a three-dimensional view of the projection handle described in a specific embodiment.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Sleeve; 101. Projection hole; 20. Lens group; 30. Film; 41. First lens; 42. Second lens; 50. Light-emitting module; 60. Circuit board; 70. Power supply module; 80. Switch module; 90. Opening; 100. Projection handle. Detailed Implementation

[0033] To explain in detail the technical content, structural features, objectives, and effects of the technical solution, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0034] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0035] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0036] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0037] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0038] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0039] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0040] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0041] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0042] Please see Figures 1 to 5 This embodiment provides a structure for enhancing projection clarity, which includes:

[0043] The sleeve 10 is used for hand gripping and has a projection hole 101 at the front end. The sleeve 10 is a tubular hollow structure, and its shape can be cylindrical, polygonal, or irregular, such as an ergonomic gripping shape, such as a biomimetic arc, segmented narrowing, or asymmetrical concave and convex. The projection hole 101 can be provided with a sealing and protective structure, such as embedding a silicone / EPDM rubber sealing ring around the projection hole 101 to form a physical barrier through a pressing structure to prevent water droplets from seeping in; or a magnetic or sliding transparent dust cover can be provided, which closes to block dust when not projecting and maintains a seal through a waterproof hinge when opening and closing; or a double convex lens can be directly used to form a waterproof structure with the projection hole 101, embedding a silicone or EPDM rubber ring on the contact surface between the edge of the convex lens and the projection hole 101, and forming a physical barrier through snap-fit ​​to prevent water droplets and dust from entering.

[0044] The sleeve 10 contains, from front to back (i.e., from the end where the projection hole 101 is located to the other end), a lens group 20, a film 30, a first lens 41, a second lens 42, a light-emitting module 50, and a circuit board 60 arranged in sequence at intervals. The optical axes of the lens group 20, the first lens 41, and the second lens 42 are collinear.

[0045] The power supply module 70 and the switch module 80 are respectively electrically connected to the circuit board 60, and the circuit board 60 is electrically connected to the power supply module 70; the first lens 41 and the second lens 42 are both plano-convex lenses, and the convex surfaces of the first lens 41 and the second lens 42 are arranged facing each other.

[0046] The light-emitting module 50 can be selected from common light sources. Preferably, it can use high-brightness LEDs, which are small in size and generate little heat, making the internal structure more compact and able to provide enough light to meet the projection function.

[0047] The power supply module 70 can be a detachable battery compartment. For example, a rechargeable lithium battery can be used to provide a stable power supply to the light-emitting module 50. To ensure that the light-emitting module 50 can obtain a suitable voltage, the power supply module 70 can include a voltage conversion circuit to convert the battery's output voltage into the voltage required by the light-emitting module 50. In addition, a charging interface can be provided to facilitate users to charge the lithium battery via a charging cable, improving ease of use. Due to the low power consumption of the projection and considering portability, the power supply module 70 is preferably a battery compartment, electrically connected to the power supply terminal of the circuit board 60 via wires. The compartment can be configured as an assembly of multiple dry batteries in a ring array, making full use of the hollow space inside the sleeve 10 to ensure stable power supply, and the detachable battery compartment facilitates battery replacement. The power supply module 70 can be housed inside the sleeve 10 or configured as a separate component and detachably connected to the sleeve 10.

[0048] The switch module 80 can be mounted on the sleeve 10 and can be controlled by a pressing component, a sound control component, or a touch component to switch the light-emitting module on and off.

[0049] The light-emitting module 50 obtains electrical energy from the power supply module 70 to emit light. The light first reaches the plane of the second lens 42. Since the plane is flat, the light does not refract when entering the second lens 42 and maintains its original propagation direction. After entering the second lens 42, the light propagates parallel to the optical axis. When the light reaches the convex surface of the second lens 42, due to the curvature of the convex surface, the light refracts and deflects towards the optical axis, causing the diverging light to converge and strike the convex surface of the first lens 41. When the light enters from the convex surface of the first lens 41, due to the curvature of the convex surface, the light refracts... The light rays are deflected in the direction of the optical axis. After entering the lens, they continue to propagate in the direction of the optical axis. When the light rays reach the plane of the lens, since the plane is flat, the light rays will not be refracted and will continue to propagate in a way parallel to the optical axis. By controlling the distance and curvature diameter of the first lens 41 and the second lens 42, the light rays of the light-emitting module 50 are enhanced and converged after being focused by the second lens 42 and deflected by the first lens 41. Then the light rays pass through the film 30, on which an image is pre-set. The light rays are further magnified by the lens group 20 and finally emitted from the projection hole 101 to form a projected image in the external environment.

[0050] This invention provides power to the light-emitting module 50 via the power supply module 70 and enables it to emit light. A first lens 41 and a second lens 42, both of which are plano-convex lenses, are provided between the light-emitting module 50 and the film 30. The convex surfaces of the first lens 41 and the second lens 42 are arranged opposite to each other. Light passes sequentially through the converging of the second lens 42 and the deflection of the first lens 41 to form enhanced converging light rays. This light rays work in conjunction with the film 30 and the lens group 20 to achieve projection, increase the projection distance, and effectively enhance the projection clarity.

[0051] In some embodiments, the aperture of the first lens 41 is not smaller than the aperture of the second lens 42. In the path of light travel, the first lens 41 is located after the second lens 42. In order to gather a wider range of light rays, the aperture of the first lens 41 should be configured to be not smaller than the aperture of the second lens 42, thereby increasing the intensity of light incident on the film 30 and improving the projection imaging quality.

[0052] In some embodiments, the distance between the convex vertices of the first lens 41 and the second lens 42 is 3 ± 1 mm. Within this range, the cooperation between the first lens 41 and the second lens 42 can provide good enhancement.

[0053] In some embodiments, the planar diameter of the first lens 41 is 15.5 ± 0.5 mm; and / or the planar diameter of the second lens 42 is 15.5 ± 0.5 mm. Within this range, the cooperation between the first lens 41 and the second lens 42 can provide good enhancement.

[0054] In some embodiments, the lens group 20 includes multiple biconvex lenses. Specifically, the number can be set to three and equally spaced. The core function of a biconvex lens (a lens with two convex surfaces) is to optimize the optical path and image quality by converging light rays. It can quickly focus and collimate the diverging beam emitted by a light source (such as an LED or a bulb) into parallel light. Using multiple biconvex lens groups 20 together can significantly optimize the performance of the optical system through synergistic effects: by adjusting the lens spacing and curvature matching, the divergence angle can be further compressed, the light energy utilization rate can be improved, and higher-order aberrations (such as field curvature and distortion) that are difficult to eliminate with a single lens can be corrected, resulting in more uniform illumination and higher resolution imaging. In addition, the combination of multiple lens groups 20 can also expand the flexibility of optical path design. For example, in a projection system, the magnification can be adjusted by using a zoom group, ultimately balancing brightness, contrast and imaging accuracy in a compact space. Furthermore, the radius of curvature of the anterior convex surface of the biconvex lens is smaller than that of the posterior convex surface. Light enters from the posterior spherical surface (which has a larger and flatter radius of curvature), while the anterior spherical surface has a smaller radius of curvature (more curved). Therefore, the lens's converging ability is significantly enhanced due to the stronger curvature of the anterior surface. The anterior surface exhibits gentler initial refraction of light, while the anterior surface, with its greater curvature, causes more severe deflection of light as it passes through. This overall shortens the effective focal length and increases the optical power, resulting in a clearer projected image. Specifically, the distance between the biconvex lenses is 4±1mm. The distance between the film 30 and the lens group 20 is also 4±1mm.

[0055] In some embodiments, the side wall of the sleeve 10 is provided with an opening 90 for inserting the film 30. The size of the opening 90 is adapted to the size of the film 30. By providing the opening 90, it is convenient to replace the film 30, and the projected image can be replaced without disassembling the sleeve 10, which is convenient and quick. Furthermore, an auxiliary port can be provided on the sleeve 10. The auxiliary port should be provided on the sleeve 10 at the location of the film 30, for example, on the opposite side of the opening 90. The film 30 can be pushed through the auxiliary port for easy removal, improving replacement efficiency.

[0056] This invention also provides a projection handle 100, which can be combined with an existing umbrella body. The projection handle 100 is provided with a structure for enhancing projection clarity as described in any of the foregoing embodiments. The projection handle 100 and the structure for enhancing projection clarity are detachably connected. The structure for enhancing projection clarity can be fitted inside the projection handle 100, requiring only an opening at the bottom of the projection handle 100 to avoid obstructing projection. Alternatively, the sleeve 10 of the structure for enhancing projection clarity can be configured to be the same size as or close to that of the projection handle 100, allowing for detachable splicing. Preferably, the projection handle 100 is detachably connected to the umbrella body. When the projection handle 100 and the structure for enhancing projection clarity are fixed, this provides additional disassembly functionality for easy replacement.

[0057] The present invention also provides a projection umbrella, including an umbrella body and a projection handle 100 as described above. The umbrella body is detachably connected to the projection handle 100.

[0058] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. A structure for enhancing projection definition, characterized in that: a sleeve for holding by a hand, a projection hole being provided at a front end of the sleeve; a lens group, a film, a first lens, a second lens, a light-emitting module and a circuit board being sequentially and spacedly arranged in the sleeve from front to back, the optical axes of the lens group, the first lens and the second lens being collinear; a power supply module and a switch module, the light-emitting module and the switch module being electrically connected to the circuit board, the circuit board being electrically connected to the power supply module; the first lens and the second lens are both plano-convex lenses, the convex surfaces of the first lens and the second lens being oppositely arranged.

2. The structure for enhancing the definition of a projection according to claim 1, wherein: the clear aperture of the first lens is not less than that of the second lens.

3. The structure for enhancing the definition of a projection according to claim 2, wherein: the convex surface vertex distance between the first lens and the second lens is 3±1mm. 4.The structure for enhancing projection definition according to claim 3, characterized in that: the flat surface diameter of the first lens is 16.5±0.5mm; and / or the flat surface diameter of the second lens is 15.5±0.5mm.

5. The structure for enhancing the definition of a projection according to claim 1, wherein: the lens group comprises a plurality of lenticular lenses.

6. A structure for enhancing the definition of a projection according to claim 5, characterized in that: the curvature radius of the front convex surface of the lenticular lens is less than that of the rear convex surface; and / or the lens group is composed of three lenticular lenses arranged at equal intervals. 7.The structure for enhancing projection definition according to claim 6, characterized in that: the interval between the lenticular lenses is 2±1mm; and / or the interval between the film and the lens group is 4±1mm.

8. The structure for enhancing the definition of a projection according to claim 1, wherein: an opening for inserting the film is provided on the side wall of the sleeve.

9. A projection handle characterized by: the handle is provided with a structure for enhancing projection definition according to any one of claims 1-7.

10. A projection umbrella characterized by: an umbrella body and a projection handle according to claim 9 are included.

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