Projection structure and sound box

Abstract

The utility model discloses a projection structure and a sound box, and relates to the sound box technology field, the projection structure comprises a shading cylinder, a lamp panel and a transmission assembly, the shading cylinder is provided with a light path channel; the lamp panel is connected with one end of the shading barrel, and the light emitting side of the lamp panel is located on the side, close to the light path channel, of the lamp panel; the light transmitting assembly comprises at least two focusing lenses, and the two focusing lenses are arranged in the light path channel in a spaced mode and used for gathering light emitted by the lamp panel.

Description

Technical Field

[0001] The utility model relates to the technical field of speakers, and particularly relates to a projection structure and a speaker. Background Art

[0002] With the improvement of people's living standards, speakers, as an important tool for creating a home music environment, have become very important electrical appliances in people's lives. In order to improve the user experience, a projection structure is combined with the speaker to enhance the functionality and practicality of the speaker.

[0003] In the related art, the projection structure of a speaker generally includes a lamp board, a light mixing and adjusting cylinder, and a lens. An LED lamp is arranged on the lamp board. The light mixing and adjusting cylinder is located around the LED lamp and is connected to the lamp board. The light emitted by the LED lamp is reflected and gathered by the light mixing and adjusting cylinder to form a light spot with a specific shape and projected onto the lens, and then projected onto a curtain or a wall through the lens to achieve projection. With this projection, the brightness of the light is uneven and the granularity is obvious, thus resulting in a poor projection display effect. Summary of the Utility Model

[0004] The main object of the utility model is to propose a projection structure and a speaker, aiming to improve the light uniformity of the projection structure.

[0005] To achieve the above object, the projection structure proposed by the utility model includes:

[0006] A light-shielding cylinder, which is provided with an optical path channel;

[0007] A lamp board, which is connected to one end of the light-shielding cylinder, and the light-emitting side of the lamp board is located on the side of the lamp board close to the optical path channel; and

[0008] A light-transmitting component, which includes at least two focusing lenses. The two focusing lenses are spaced in the optical path channel and are used to gather the light emitted by the lamp board.

[0009] The utility model also proposes a speaker, which includes a main body and the projection structure in any of the above embodiments. The main body includes a mounting seat and a transparent top cover. The mounting seat and the transparent top cover enclose a containing cavity, and the projection structure is arranged in the containing cavity. Description of the Drawings

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings required for use in the descriptions of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0011] Figure 1 Schematic cross-sectional exploded view of an embodiment of the projection structure provided by the present utility model;

[0012] Figure 2 Cross-sectional view of an embodiment of the projection structure provided by the present utility model;

[0013] Figure 3 Cross-sectional view of another embodiment of the projection structure provided by the present utility model (arrow indicates the light propagation direction);

[0014] Figure 4 Cross-sectional view of still another embodiment of the projection structure provided by the present utility model (arrow indicates the light propagation direction).

[0015] Explanation of the reference numerals in the drawings:

[0016] 100, projection structure; 1, light-shielding cylinder; 11, optical path channel; 12, first heat dissipation groove; 2, lamp board; 21, lamp beads; 3, light-transmitting component; 31, focusing lens; 32, Fresnel surface; 33, even aspherical surface; 4, base; 5, heat dissipation bracket; 51, limiting step; 52, second heat dissipation groove; 53, heat dissipation port; 6, lamp ring board; 7, projection lens; 71, bending part; 72, diffusion layer; 73, high-transparency layer; 8, cavity;

[0017] 200, body; 210, mounting seat; 220, transparent top cover; 230, accommodating cavity.

[0018] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0021] In addition, if the embodiments of the present utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0022] The present utility model provides a projection structure 100.

[0023] Please refer to Figures 1 to 4 , in an embodiment of the present utility model, the projection structure 100 includes a light-shielding cylinder 1, a lamp board 2, and a light-transmitting component 3. The light-shielding cylinder 1 is provided with an optical path channel 11; the lamp board 2 is connected to one end of the light-shielding cylinder 1, and the light-emitting side of the lamp board 2 is located on the side of the lamp board 2 close to the optical path channel 11; the light-transmitting component 3 includes at least two focusing lenses 31, and the two focusing lenses 31 are spaced apart and arranged in the optical path channel 11 and are used to converge the light emitted by the lamp board 2.

[0024] In an embodiment of the present utility model, the light emitted by the lamp board 2 propagates towards the optical path channel 11, causing the light to pass through two focusing lenses 31 in sequence. One focusing lens 31 close to the lamp board 2 converges the light, and the converged light then passes through the other focusing lens 31 away from the lamp board 2. The light converges and crosses on the focusing lens 31 away from the lamp board 2 and then diverges, finally forming a relatively uniform blurred light spot. A plurality of lamp beads 21 are provided on the light-emitting side of the lamp board 2, and each lamp bead 21 forms a blurred light spot. The plurality of blurred light spots are connected into a sheet, thereby reducing the gap between the light spots and improving the uniformity of the projection. Using this projection, the brightness uniformity of the light is good and there is no obvious graininess, ultimately improving the display effect of the projection; an optical path channel 11 is provided in the light-shielding cylinder 1 for guiding the light from the lamp board 2 to the light-transmitting component 3, which helps to maintain the directivity of the light and reduce the scattering of the light; the lamp board 2 is connected to one end of the light-shielding cylinder 1, and its light-emitting surface faces the side of the optical path channel 11. The light emitted by the lamp board 2 directly enters the optical path channel 11 and passes through the light-transmitting component 3; the light-transmitting component 3 includes at least two focusing lenses 31, and these lenses are arranged at intervals in the optical path channel 11. Their function is to focus the light emitted by the lamp board 2 and improve the light uniformity of the projection; by adjusting the propagation path of the light, the focusing lens 31 enables the light to be more evenly distributed after passing through the two lenses, which helps to connect the light emitted by the plurality of lamp beads 21 on the lamp board 2 into a sheet, thereby improving the uniformity of the projection effect.

[0025] Specifically, please refer to Figure 1 and Figure 2, in an embodiment of the present utility model, there are two focusing lenses 31. The side of the focusing lens 31 close to the lamp board 2 is a Fresnel surface 32, and the side of the focusing lens 31 away from the lamp board 2 is an even aspherical surface 33. The Fresnel surface 32 is located on the side close to the lamp board 2, and its structure consists of multiple concentric annular grooves, which can effectively focus light. The design of the Fresnel surface 32 can reduce the loss of light in the lens, and at the same time provide sufficient light bending ability to converge the light to a point or area; the even aspherical surface 33 is located on the side away from the lamp board 2, and the shape of the even aspherical surface 33 is precisely designed to compensate for the aberration of light and further optimize the light distribution. The even aspherical surface 33 lens can focus light more accurately, reduce aberration and distortion, and thus provide a more uniform light spot; after passing through the two lenses, the light will form a blurred light spot, and these blurred light spots are generated by the optical characteristics of the Fresnel surface 32 and the even aspherical surface 33. The uniform distribution of light can reduce the visual non-uniformity caused by the gaps between the light spots; in an embodiment, the focal length of the even aspherical surface 33 of the focusing lens 31 set away from the lamp board 2 is between 150 and 300 mm, preferably 210 mm, and the focal length of the Fresnel surface 32 is between 20 and 40 mm, preferably 27.5 mm, to ensure the precise focusing of light; in another embodiment, the focal length of the even aspherical surface 33 of the focusing lens 31 set away from the lamp board 2 is between 300 and 600 mm, preferably 450 mm, and the focal length of the Fresnel surface 32 is between 80 and 110 mm, preferably 96.8 mm, to ensure the precise focusing of light.

[0026] In an embodiment of the present utility model, the distance between one of the focusing lenses 31 close to the lamp board 2 and the lamp board 2 is d1, and the distance between the two focusing lenses 31 is d2. Among them, 7.66 mm ≤ d1 ≤ 27.66 mm, 2.51 mm ≤ d2 ≤ 22.51 mm. Increasing d1 will make the optical path between one of the focusing lenses 31 close to the lamp board 2 and the lamp board 2 longer, which helps the light to be better focused initially. However, if d1 is too large, it may cause the focusing lens 31 to be unable to effectively collect all the light emitted from the lamp board 2, thus affecting the uniformity of the light spot. Reducing d1 will make the light closer to the focusing lens 31, but it is necessary to ensure that the light can be fully focused, which will make the propagation distance of the light between the two lenses longer, which may help to improve the light processing and the final light spot uniformity; too large d2 may cause more light loss or aberration during the propagation of light, and reducing d2 may make the propagation distance of the light between the lenses insufficient, affecting the quality and uniformity of the light spot; the distances of d1 and d2 can be adjusted within the above ranges according to actual requirements and specific applications.

[0027] Please refer to Figure 1, in an embodiment of the present utility model, a plurality of lamp beads 21 are provided on the light-emitting side of the lamp board 2. The plurality of lamp beads 21 are arranged in concentric circular rings from the center to the periphery on the lamp board 2, and each lamp bead 21 is independently driven. The concentric circular ring arrangement of the lamp beads 21 on the lamp board 2 can optimize the light distribution and uniformity. By independently driving each lamp bead 21, flexible light brightness adjustment and precise spot control can be achieved. This layout allows the brightness of each lamp bead 21 to be adjusted to compensate for different parts of the spot, achieving the uniformity of the final projection; and it can also realize some fixed-shape projection imaging by controlling some lamp beads 21 to be lit through software, and various fixed-shape projection imaging can be generated according to actual needs.

[0028] In an embodiment of the present utility model, a reflective coating is applied to the inner peripheral wall of the optical path channel 11. The reflective coating can effectively reflect most of the light back into the optical path, reduce light loss, and reduce the unevenness of the light spot caused by the unevenness of the inner peripheral wall of the optical path channel 11; by setting the reflective coating, more light can be reflected, enhancing the brightness of the projection; the reflective coating can not only improve the optical performance, but also protect the inner wall of the optical path channel 11, increasing durability and lifespan; the reflective coating can be a white high-gloss ink layer or a highly reflective white powder coating, and the present utility model does not limit this.

[0029] To improve the heat dissipation performance of the projection structure 100, please refer to Figure 1 , in an embodiment of the present utility model, a plurality of first heat dissipation grooves 12 are provided at intervals along the circumferential direction of the outer peripheral wall of the light-shielding cylinder 1. The first heat dissipation grooves 12 help to dissipate the heat generated during the operation of the lamp board 2 in the projection structure 100 from the surface of the light-shielding cylinder 1, reducing heat accumulation; effective heat dissipation can reduce the temperature of the light-shielding cylinder 1 and its internal components, avoiding damage to the optical system and other electronic components caused by overheating; appropriate heat dissipation can reduce the material expansion and contraction caused by temperature changes, thereby reducing the thermal stress of the structure and extending the service life; by controlling the temperature through the first heat dissipation grooves 12, the influence of thermal expansion and contraction on the optical performance can be avoided, and the consistency of the projection or light distribution can be maintained.

[0030] Furthermore, please refer to Figures 1 to 3, in an embodiment of the present utility model, the projection structure 100 includes a base 4, a heat dissipation bracket 5, two lamp ring plates 6, and a projection lens 7. The heat dissipation bracket 5 is disposed on the base 4. The lamp board 2 is disposed on a side of the heat dissipation bracket 5 facing the light-shielding cylinder 1. The heat dissipation bracket 5 is provided with two limiting steps 51 at intervals along the height direction of the heat dissipation bracket 5. Each lamp ring plate 6 is disposed on one of the limiting steps 51. The projection lens 7 covers the base 4 and encloses a cavity 8 with the base 4 and the focusing lens 31 away from the lamp board 2. Two bending portions 71 are formed at intervals along the height direction of the projection lens 7. Each lamp ring plate 6 is correspondingly disposed with one of the bending portions 71. Each lamp ring plate 6 projects the shape of one bending portion 71 and transmits the image from the side of the projection structure 100. The light emitted by the lamp board 2 is transmitted from the top surface of the projection structure 100. The top surface and the side surface are partitioned and independent of each other. Two limiting steps 51 are provided to ensure that the distance between each lamp ring plate 6 and one bending portion 71 is equal. Furthermore, the distance from the light-emitting beads 21 on the lamp ring plate 6 to the projection lens 7 is equal, so that the incident angle of the light on the projection lens 7 is consistent, which can ensure that the light spot formed on the projection lens 7 is more uniform, help reduce the brightness difference in the light spot, and make the final projection image more uniform and stable. The projection lens 7 covers the base 4 and encloses a cavity 8 with the base 4 and the focusing lens 31 away from the lamp board 2, so that the heat dissipation bracket 5, the two lamp ring plates 6, the light-transmitting component 3, the light-shielding cylinder 1, and the lamp board 2 are all accommodated in the cavity, integrating the key components in a compact space, effectively reducing the volume of the entire projection system, meeting the requirement for product miniaturization, and better protecting these components, reducing the influence of the external environment on the structure.

[0031] To make the quality of the final projected image higher, please refer to Figure 3 , in an embodiment of the present utility model, the projection lens 7 includes a diffusion layer 72 and a high-transmission layer 73. The diffusion layer 72 and the high-transmission layer 73 are sequentially arranged from the inside of the cavity 8 to the outside. The main function of the diffusion layer 72 is to evenly distribute the light to the entire surface of the projection lens 7, which can reduce the brightness non-uniformity of the light spot, ensure that the distribution of the light on the lens is more uniform, make the quality of the final projected image higher, and the brightness distribution more uniform. The main function of the high-transmission layer 73 is to improve the light transmittance, and as much light as possible is transmitted through the lens to the projection surface. It is usually made of a material with a high light transmittance to minimize light loss, optimize the light transmission efficiency, ensure that more light passes through the projection lens 7 and reaches the projection surface, and help improve the brightness and clarity of the projection image.

[0032] To further improve the heat dissipation performance of the projection structure 100, please refer to Figure 3, in an embodiment of the present utility model, a plurality of second heat dissipation grooves 52 are spaced apart on one side of the heat dissipation bracket 5 facing the lamp board 2, and a plurality of heat dissipation openings 53 are spaced apart on the bottom wall of each second heat dissipation groove 52. The arrangement of the second heat dissipation grooves 52 can increase the surface area of the heat dissipation bracket 5, thereby improving the heat dissipation efficiency. The plurality of second heat dissipation grooves 52 provide more air circulation paths, enabling heat to be more effectively transferred from the lamp board 2 to the heat dissipation bracket 5 and ultimately dissipated into the surrounding environment; the heat dissipation openings 53 are openings on the bottom wall of the second heat dissipation grooves 52. Through these openings, heat can be dissipated from the inside of the heat dissipation grooves to the outside. The arrangement of the heat dissipation openings 53 increases the path for heat to be released from the surface of the heat dissipation bracket 5 to the outside, thereby further improving the heat dissipation effect; the uniformly distributed plurality of second heat dissipation grooves 52 and plurality of heat dissipation openings 53 contribute to achieving a more uniform temperature distribution, reducing the risk of local overheating, and thus protecting the performance and lifespan of the lamp board 2 and other key components.

[0033] The present utility model also proposes a speaker, which includes a main body 200 and a projection structure 100. The specific structure of the projection structure 100 refers to the above-mentioned embodiment. Since this speaker adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one. Among them, the main body 200 includes a mounting seat 210 and a transparent top cover 220. The mounting seat 210 and the transparent top cover 220 enclose to form a receiving cavity 230, and the projection structure 100 is disposed in the receiving cavity 230.

[0034] The above are only exemplary embodiments of the present utility model and do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A projection structure, characterized in that, Comprising: A light-shielding cylinder, which is provided with an optical path channel; A light board, which is connected to one end of the light-shielding cylinder, and the light-emitting side of the light board is located on the side of the light board close to the optical path channel; And A light-transmitting component, which includes at least two focusing lenses. The two focusing lenses are spaced in the optical path channel and are used to converge the light emitted by the light board.

2. The projection structure according to claim 1, wherein There are two focusing lenses. The side of the focusing lens close to the light board is a Fresnel surface, and the side of the focusing lens far from the light board is an even aspherical surface.

3. The projection structure according to claim 1, wherein The distance between one of the focusing lenses close to the light board and the light board is d1, and the distance between the two focusing lenses is d2. Wherein, 7.66 mm ≤ d1 ≤ 27.66 mm, 2.51 mm ≤ d2 ≤ 22.51 mm.

4. The projection structure according to claim 1, wherein The light-emitting side of the light board is provided with a plurality of lamp beads. The plurality of lamp beads are arranged in concentric circles on the light board from the center to the periphery, and each lamp bead is independently driven.

5. The projection structure according to claim 1, characterized in that, The inner peripheral wall of the optical path channel is coated with a reflective coating.

6. The projection structure according to claim 1, wherein The outer peripheral wall of the light-shielding cylinder is provided with a plurality of first heat dissipation grooves at intervals along the circumferential direction of the light-shielding cylinder.

7. The projection structure according to any one of claims 1 to 6, characterized in that, The projection structure includes a base, a heat dissipation bracket, two lamp ring plates and a projection lens. The heat dissipation bracket is arranged on the base. The light board is arranged on the side of the heat dissipation bracket facing the light-shielding cylinder. The heat dissipation bracket is provided with two limiting steps at intervals along the height direction of the heat dissipation bracket. Each lamp ring plate is arranged on one of the limiting steps. The projection lens covers the base and encloses a cavity with the base and the focusing lens far from the light board; The projection lens is provided with two bending parts at intervals along the height direction of the projection lens, and each lamp ring plate is arranged corresponding to one of the bending parts.

8. The projection structure according to claim 7, wherein The projection lens includes a diffusion layer and a high-transmission layer, and the diffusion layer and the high-transmission layer are arranged in sequence from the inside of the cavity to the outside.

9. The projection structure according to claim 7, wherein, The side of the heat dissipation bracket facing the light board is provided with a plurality of second heat dissipation grooves at intervals, and the bottom wall of each second heat dissipation groove is provided with a plurality of heat dissipation openings.

10. A speaker, characterized in that, Comprising: The projection structure according to any one of claims 1 to 9; And A main body, which includes a mounting seat and a transparent top cover. The mounting seat and the transparent top cover enclose a receiving cavity, and the projection structure is arranged in the receiving cavity.

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