Imaging light path system of starry sky lamp and starry sky lamp thereof

Abstract

The utility model relates to the field of projection devices, in particular to an imaging light path system of a starry sky lamp and the starry sky lamp thereof. The light path system comprises a light source, a condensation collimating lens group, a projection piece group and a projection lens which are sequentially arranged along a light path. According to the utility model, the layering sense of a projection picture can be enriched, a better light path utilization effect can be realized, and diversified requirements of users can be better met.

Description

Technical Field

[0001] This utility model relates to the field of projection devices, specifically to an imaging optical path system for a starry sky lamp and the starry sky lamp itself. Background Technology

[0002] In terms of presenting starry sky effects, existing star projectors offer extremely limited visual representations. From a dynamic effect simulation perspective, static projectors have a fundamental flaw: they cannot simulate celestial motion. Existing star projectors can only display static star charts, failing to vividly depict these celestial movements. This makes it difficult for users to gain an immersive experience of the dynamic changes in the real starry sky, greatly limiting the fun and appeal of star projectors. Regarding the technical means of achieving dynamic effects, some star projectors use a single rotating projector. However, this single-rotating projector solution results in a severe lack of image depth, failing to showcase the completeness and richness of the starry sky landscape. While some star projectors on the market offer multi-layered projection effects, these products often face the problem of high costs.

[0003] Furthermore, the importance of the optical path system in the design of star projectors cannot be ignored. The optical path system is one of the key factors determining the projection effect, directly affecting the light transmission efficiency, uniformity, and image quality. If the optical path is not utilized efficiently in a star projector, the projection effect will be dim and unclear. Problems such as light loss and scattering during transmission, as well as image distortion, will reduce user satisfaction with the projected image, thereby affecting the product's market competitiveness.

[0004] In conclusion, existing star projection lamps have problems in terms of image depth, cost, and light path utilization that urgently need to be solved. Developing a star projection device that can overcome the above defects and provide a better star projection experience has important practical significance and market value. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This application mainly provides an imaging optical path system for a starry sky lamp and the starry sky lamp itself, so as to enhance the sense of layering of the projected image and achieve better light path utilization.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides an imaging optical path system for a starry sky lamp, comprising: a light source, a focusing collimating lens group, a projection component group, and a projection lens arranged sequentially along the optical path;

[0009] The light source is used to provide a light beam;

[0010] The focusing and collimating lens group includes a focusing lens and a collimating lens arranged sequentially along the optical path, used to focus and collimate the illumination beam; the focusing lens includes at least one lens, and the collimating lens includes at least one lens.

[0011] The projection assembly includes a rotating projection sheet and a static projection sheet stacked together. Light rays that have been focused and collimated by the focusing and collimating lens assembly pass through the rotating projection sheet and the static projection sheet, and then pass through the projection lens to project the superimposed projection image of the rotating projection sheet and the static projection sheet to the outside. The central axis of the light path passes perpendicularly through the center point of the rotating projection sheet, and the rotating projection sheet is rotatably arranged around the central axis.

[0012] Preferably, the focusing lens includes a first convex lens and a second convex lens arranged sequentially along the optical path, wherein the outer diameter of the second convex lens is larger than the outer diameter of the first convex lens.

[0013] Preferably, the collimating lens includes a convex lens.

[0014] Preferably, both the condensing lens and the collimating lens are plano-convex lenses; the convex surface of the condensing lens faces the direction in which the light beam is emitted, and the convex surface of the collimating lens faces the opposite direction to the direction in which the light beam is emitted.

[0015] Preferably, the projection lens is a wide-angle lens.

[0016] Preferably, the light source is an LED light source.

[0017] Preferably, the projection assembly is replaceable.

[0018] This utility model also provides a starry sky lamp, including a housing and an imaging optical path system of a starry sky lamp according to any one of the above claims disposed within the housing.

[0019] Preferably, it includes a slide tray detachably connected to the housing, and the projector assembly is disposed on the slide tray.

[0020] Preferably, the rotating projection sheet is mounted on the projection sheet tray via a rotatable turntable. The turntable has teeth on its outer periphery, and the housing is also provided with a toggle gear. The toggle gear meshes with the teeth to drive the rotating projection sheet to rotate.

[0021] (III) Beneficial Effects

[0022] This application provides an imaging optical path system for a starry sky light and the starry sky light itself, which is equipped with a projection component group. The projection component group includes a rotating projection sheet and a static projection sheet stacked together, and the projection component group is replaceable, so as to realize the diversification of the projection content of the starry sky light, good scene expandability, good projection effect layering, and help to improve the consumer's viewing experience of starry sky projection. Attached Figure Description

[0023] Figure 1 This embodiment provides an optical path diagram of an imaging optical path system for a starry sky lamp.

[0024] [Explanation of Labels in the Attached Image]

[0025] 1: Light source; 2: Condensing collimating lens group; 210: Condensing lens; 211: First convex lens; 212: Second convex lens; 220: Collimating lens; 3: Projection component group; 310: Rotating slide; 320: Static slide; 4: Projection lens. Detailed Implementation

[0026] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] 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.

[0028] Furthermore, in this utility model, the use of terms such as "first" and "second" is 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixation" should be interpreted broadly. For example, "fixation" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] like Figure 1As shown, this embodiment provides an imaging optical path system for a starry sky lamp. The system includes: a light source 1, a focusing collimating lens group 2, a projection element group 3, and a projection lens 4 arranged sequentially along the optical path.

[0031] The light source 1 is used to provide a light beam; specifically, the light source 1 may include an LED light source of at least one color, such as a white fluorescent light source, a white LED light source, or a multi-color mixed light LED light source. In this embodiment, the light source 1 provides a white LED light source.

[0032] The focusing and collimating lens group 2 includes a focusing lens 210 and a collimating lens 220 arranged sequentially along the optical path for focusing and collimating the illumination beam. The focusing lens 210 includes at least one lens, and the collimating lens 220 includes at least one lens. The focusing convex lens is positioned close to the light source 1. The number of lenses and other settings of the focusing lens 210 and the collimating lens 220 can be adjusted according to specific circumstances. Figure 1 For illustrative purposes only, this embodiment of the present invention provides an imaging optical path system for a starry sky lamp. It employs a combination design of two types of lenses: a condenser lens 210 and a collimating lens 220. This reduces scattering and loss of the light beam during propagation, allowing more light beams to participate in the imaging process.

[0033] The projection assembly 3 includes a rotating projection sheet 310 and a static projection sheet 320 stacked together. The light beam, after being focused and collimated by the focusing and collimating lens assembly 2, passes through the rotating projection sheet 310 and the static projection sheet 320, and then passes through the projection lens 4 to project the superimposed projection image of the rotating projection sheet 310 and the static projection sheet 320 to the outside. The central axis of the light path passes perpendicularly through the center point of the rotating projection sheet 310, and the rotating projection sheet 310 is rotatably arranged around the central axis.

[0034] The static projection sheet 320 can display relatively stable celestial elements such as background nebulae and fixed constellation patterns, providing a basic and rich visual background for the projected image. The rotating projection sheet 310 can display dynamic celestial phenomena such as comet trails and constellation movements. By layering the two, the light beam passes through them sequentially, achieving a perfect superposition of dynamic and static patterns. This provides users with a more realistic, vivid, and layered starry sky projection experience, satisfying their pursuit of the richness and diversity of a beautiful starry sky.

[0035] Preferably, in this example, during installation, the axis of the focusing collimating lens group 2, the axis of the projection component group 3, and the axis of the projection lens 4 are kept on the same straight line, which helps to improve the uniformity of the light beam.

[0036] Preferably, the focusing lens 210 in this embodiment includes a first convex lens 211 and a second convex lens 212 arranged sequentially along the optical path. The outer diameter of the second convex lens 212 is larger than the outer diameter of the first convex lens 211. By using a staged light focusing method, the dispersed light beam can be more effectively transformed into a highly concentrated light beam, greatly improving the focusing degree of the light beam.

[0037] Optionally, the first convex lens 211 is positioned close to the light source 1, which can further improve the light collection efficiency of the condenser lens 210 and reduce the amount of light beam loss.

[0038] In a preferred embodiment of this invention, the collimating lens 220 includes a single convex lens. The design of the collimating lens 220, which comprises only a single convex lens, simplifies the entire optical path structure. Compared to a collimating lens 220 using a combination of multiple lenses, this reduces the number of optical elements, resulting in a simpler optical path layout and lower cost.

[0039] The condenser lens 210 and the collimating lens 220 are both plano-convex lenses. The convex surface of the condenser lens 210 faces the direction of the beam emission. The beam emitted by the light source 1 first enters the plane of the condenser lens 210, passes through the plane and enters the lens. Then, it is refracted at the convex surface and the beam gradually converges towards the central axis, realizing the initial collection and convergence function of the beam.

[0040] The convex surface of the collimating lens 220 faces in the opposite direction to the direction in which the light beam is emitted. The convex surface of the collimating lens 220 faces the condenser lens 210, while the flat side faces the subsequent optical elements (such as the projection assembly 3). The light beam, after being converged by the condenser lens 210, continues to propagate and is incident on the convex surface of the collimating lens 220. The light beam is refracted again at the convex surface, and the light beam, which originally still had a certain divergence angle, is further adjusted into a parallel beam, thereby achieving the collimation of the light beam.

[0041] Preferably, the projection lens 4 is a wide-angle lens. Through the wide-angle projection, the starry sky pattern can be presented in a more grand manner, enhancing the user's visual immersion.

[0042] Specifically, the light source 1 is an LED light source (Light Emitting Diode). During long-term use, the brightness of the LED light source decays relatively slowly, and its colors are diverse and adjustable.

[0043] Furthermore, in this embodiment, the projection assembly 3 is replaceable.

[0044] Specifically, both the static projection sheet 320 and the rotating projection sheet 310 can be disassembled and replaced. In other embodiments, only one of the static projection sheet 320 and the rotating projection sheet 310 can be replaced.

[0045] This application provides a starlight lamp, including a housing and an imaging optical path system of a starlight lamp according to any one of the above claims disposed within the housing.

[0046] Optionally, the device includes a projection tray detachably connected to the housing, with the projection assembly 3 disposed on the projection tray. When replacing the projection assembly 3, the projection tray is removed, another projection assembly 3 is replaced, and then the projection tray is reinstalled. By replacing the projection assembly 3, the starlight can project a variety of different visual effects, meeting diverse product needs.

[0047] Preferably, the rotating projection sheet 310 is mounted on the projection sheet tray via a rotatable turntable. The turntable has teeth on its outer periphery, and the housing is also provided with a toggle gear. The toggle gear meshes with the teeth to drive the rotating projection sheet 310 to rotate 360 ​​degrees.

[0048] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. In addition to the above embodiments, this utility model may have other implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. An imaging light path system of a starfield lamp, characterized by, include: The light source, the collimating lens group, the projection component group, and the projection lens are arranged sequentially along the light path; The light source is used to provide a light beam; The focusing and collimating lens group includes a focusing lens and a collimating lens arranged sequentially along the optical path, used to focus and collimate the illumination beam; the focusing lens includes at least one lens, and the collimating lens includes at least one lens. The projection assembly includes a rotating projection sheet and a static projection sheet stacked together. Light rays that have been focused and collimated by the focusing and collimating lens assembly pass through the rotating projection sheet and the static projection sheet, and then pass through the projection lens to project the superimposed projection image of the rotating projection sheet and the static projection sheet to the outside. The central axis of the light path passes perpendicularly through the center point of the rotating projection sheet, and the rotating projection sheet is rotatably arranged around the central axis.

2. The imaging light path system of a starfield lamp according to claim 1, wherein, The focusing lens includes a first convex lens and a second convex lens arranged sequentially along the optical path, wherein the outer diameter of the second convex lens is larger than the outer diameter of the first convex lens.

3. The imaging light path system of a starfield lamp according to claim 2, wherein, The collimating lens includes one convex lens.

4. The imaging light path system of a starfield lamp according to claim 3, wherein, Both the condensing lens and the collimating lens are plano-convex lenses; the convex surface of the condensing lens faces the direction in which the light beam is emitted, and the convex surface of the collimating lens faces the opposite direction to the direction in which the light beam is emitted.

5. The imaging light path system of a starfield lamp according to claim 1, wherein, The projection lens is a wide-angle lens.

6. The imaging light path system of a starfield lamp according to claim 1, wherein, The light source is an LED light source.

7. The imaging light path system of a starfield lamp according to claim 1, wherein, The projector assembly is replaceable.

8. A starfield lamp characterized by It includes a housing and an imaging optical path system for a starlight lamp according to any one of claims 1-7 disposed within the housing.

9. The starfield lamp of claim 8, wherein, Includes a slide tray detachably connected to the housing, and the slide assembly is disposed on the slide tray.

10. The starfield lamp of claim 9, wherein, The rotating projection sheet is mounted on the projection sheet tray via a rotatable turntable. The turntable has teeth on its outer periphery, and the housing is also provided with a toggle gear. The toggle gear meshes with the teeth to drive the rotating projection sheet to rotate.

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