Nebula lens module and starry sky projection equipment with same

Abstract

The utility model relates to a nebula lens module and a starry sky projection device with the nebula lens module, the nebula lens module comprises an outer optical lens with nebula lines and an inner optical lens with lighting effect lines, the nebula lens module can generate a nebula by using a new structure through adding an incoherent light source, and the lens module is driven to rotate through adding a driving piece, so that the nebula is formed. Due to the existence of the nebula lines and the lighting effect lines, the light source changes twice when penetrating through the rotating lens module, so that the nebula has double dynamic states.

Description

Technical Field

[0001] The utility model relates to the technical field of projection, and in particular to a nebula lens module and a starry sky projection device with the same. Background Art

[0002] Projection is a technology with a long history. It has become an indispensable part of people's lives since its birth. With the continuous improvement of people's living standards and the advancement of projection technology, people have begun to pursue a better life experience, so a variety of starry sky projections have appeared on the market.

[0003] A starry sky projection lamp and a nebula generation method thereof are disclosed in the patent document with publication number CN112728465, which include an interference plate capable of generating a nebula effect, a beam generator and a reflector respectively placed on both sides of the interference plate, and at least one first lens. The light emitted from the beam generator passes through the interference plate and the reflector and then passes through the first lens to form a nebula. The interference plate is driven to rotate by a motor so that the nebula has a dynamic state. The projection lamp also includes a grating plate and a laser for generating stars. The grating plate is driven to rotate by a motor so that the stars move.

[0004] Since most of the methods for generating nebulae in the technical field adopt the method in the above patent, which is to project a light source onto an interference plate and then generate a nebula through an external focusing lens, the method for generating nebulae and the effect of nebulae are very simple, and the dynamic mode of nebulae is also very limited, with only one dynamic mode. It can no longer meet people's more and higher visual needs. Utility Model Content

[0005] The problem to be solved by the utility model is to provide a nebula lens module capable of generating nebulas with a new structure, and a starry sky projection component capable of generating a double dynamic nebula.

[0006] In order to solve the above technical problems, the utility model provides a nebula lens module, including at least one outer optical lens and at least one inner optical lens; the outer optical lens includes at least one thin-walled structure with an outward convex trend, and at least one layer of nebula patterns is provided on the thin-walled structure, and at least one optical channel is provided between the inner optical lens and the outer optical lens; the inner optical lens has a center, and the inner optical lens is provided with at least one convex transformation surface, and the convex transformation surface has a tendency to convex outward away from the center; the inner optical lens is provided with at least one layer of light effect patterns, at least a portion of the light effect patterns is located in the optical channel, and at least a portion of the outer optical lens covers the optical channel.

[0007] The utility model also provides a starry sky projection device with a nebula lens module, comprising at least one incoherent light source, at least one driving member and at least one of the aforementioned nebula lens modules, the driving member can drive the nebula lens module to rotate around at least one rotation axis, the nebula lens module is positioned on the light path of the incoherent light source, the nebula lens module comprises at least one outer optical lens and at least one inner optical lens; the outer optical lens comprises at least one thin-walled structure with an outward convex tendency, at least one layer of nebula texture is arranged on the thin-walled structure, and at least one optical channel is arranged between the inner optical lens and the outer optical lens; the inner optical lens has a center, the inner optical lens is provided with at least one convex transformation surface, the convex transformation surface has a tendency to convex outward away from the center, the inner optical lens is provided with at least one layer of light effect texture, at least a portion of the light effect texture is located in the optical channel, and at least a portion of the outer optical lens covers the optical channel.

[0008] Since the nebula lens module includes an outer optical lens with a nebula pattern and an inner optical lens with a light effect pattern, its structure is different from the prior art, and thus a nebula can be generated with a new structure. A driving module is added to the starry sky projection assembly to rotate the nebula lens module. Due to the presence of the nebula pattern and the light effect pattern, the light source undergoes two changes when passing through the rotating lens module, thereby giving the nebula a dual dynamic. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0010] Figure 1 is a three-dimensional schematic diagram of a lens module;

[0011] Figure 2 is a cross-sectional view of a lens module;

[0012] Figure 3 It is a schematic diagram of the principle of the first embodiment of the projection device;

[0013] Figure 4 is a schematic diagram of the principle of a second embodiment of a projection device;

[0014] Figure 5 is a schematic diagram of the principle of a third embodiment of a projection device;

[0015] Figure 6 is a three-dimensional schematic diagram of a fourth embodiment of a projection device;

[0016] Figure 7 is an exploded schematic diagram of a fourth embodiment of a projection device;

[0017] Figure 8 It is a schematic diagram of the installation of the diffractive optical element and the external optical lens;

[0018] Fig. 9 This is a schematic diagram showing the components installed on the positioning mounting ring as viewed from below;

[0019] Fig.10 This is a schematic diagram showing components installed on the positioning mounting ring from a top-down perspective;

[0020] Fig.11 It is a schematic diagram of the installation relationship between the bracket installation body and the positioning installation ring;

[0021] Fig.12 It is an exploded schematic diagram of the installation relationship between the bracket mounting body and the positioning mounting ring.

[0022] In the figure: incoherent light source (130); heat sink (132); coherent light source assembly (140); first coherent light source (1401); second coherent light source (1402); inner optical lens (230); lens surface (232); convex surface (234); light effect pattern (235); reflector (240); rotation axis conversion member (245); outer optical lens (260); side wall (261); edge portion (262); thin-wall structure (2601); optical element mounting hole (2602); optical element mounting surface (2603); optical element positioning portion (2604); nebula pattern (265); strip curved pattern (2651); strip vertical pattern (2652); outer lens joint portion (267); diffractive optical element (270); optical element mounting portion (271); lens Base (280); inner lens mounting portion (282); receiving groove (2821); receiving side wall portion (2822); inner hook (2823); outer lens mounting portion (284); electric control unit (300); incoherent light control unit (310); coherent light master control (315); first coherent light control unit (320); second coherent light control unit (330); drive control unit (405); drive member (410); power supply unit (450); upper shell (500); light-emitting lampshade (505); positioning mounting ring (510); positioning mounting portion (5102); bracket mounting body (515); base support portion (5156); lower shell (520); control button (522); indicator light (523); wireless module (525); base (540); heat dissipation hole (545). DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] Reference to "embodiment" or "implementation" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment or implementation may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] In this specification, for the sake of convenience, the words and phrases indicating the orientation or positional relationship such as "middle", "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like are used to illustrate the positional relationship of the constituent elements with reference to the drawings. This is only for the convenience of describing this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the orientation of the constituent elements being described. Therefore, it is not limited to the words and phrases described in the specification, and can be appropriately replaced according to the circumstances.

[0026] like Figure 1 and Figure 2 As shown, the utility model provides a nebula lens module, including an external optical lens 260 and a lens base 280 connected thereto, the external optical lens 260 having a vertically extending side wall 261, a convex thin-walled structure 2601 being provided at the top end of the side wall 261, the width of the thin-walled structure 2601 gradually decreasing in the direction away from the side wall 261, the outer surface of the thin-walled structure 2601 being smooth, the inner surface being provided with a nebula pattern 265, an edge portion 262 being circumferentially provided at the bottom end of the side wall 261, an external lens joint portion 267 being provided on the edge portion 262, and an external lens mounting portion 284 being provided on the lens base 280 corresponding to the external lens joint portion 267.

[0027] In another embodiment, the outer optical lens 260 and the lens base 280 may also be movably connected, for example, by adding structures such as gears, so that the outer optical lens 260 and the lens base 280 can rotate relative to each other.

[0028] In this embodiment, the nebula pattern 265 is distributed on the inner wall of the thin-wall structure 2601, but is not provided on the side wall 261 structure. However, it is not limited to this. In other embodiments, the nebula pattern 265 is also provided on the side wall 261 structure, or the side wall 261 structure is eliminated, or the nebula pattern 265 only occupies a part of the inner wall.

[0029] like Figure 1 and Figure 2 As shown, an inner optical lens 230 is installed in the central area of ​​the lens base 280. The inner optical lens 230 and the outer optical lens 260 can form at least one optical channel. The surface of the inner optical lens 230 located in the optical channel is provided with a light effect pattern 235. The light effect pattern 235 has an irregular shape and protrusions of different sizes. The outer optical lens 260 at least partially covers the optical channel. The central area of ​​the lens base 280 has at least one opening. The inner lens mounting portion 230 is arranged circumferentially around the opening. The inner optical lens 230 and the outer optical lens 260 are arranged coaxially.

[0030] In this embodiment, the inner optical lens 230 has a lens surface 232, a convex surface 234 is provided below the lens surface 232, and a layer of light effect texture 235 is provided on the lens surface 232. The inner optical lens 230 has a smaller size than the outer optical lens 260, and the outer optical lens 260 can cover the inner optical lens 230.

[0031] At this time, if incoherent light irradiates the inner optical lens 230, the incoherent light will produce an optical change under the action of the inner optical lens 230's own structure and the light effect pattern 235, and then pass through the outer optical lens 260 with the nebula pattern 265, and will produce optical changes again under the action of the outer optical lens 260's own structure and the nebula pattern 265 to form a new nebula. The nebula is a light effect image, which is close to the image of a huge cloud composed of gas and dust in the universe. This nebula is rich in color and has a cloud-like shape.

[0032] In another embodiment, the diameter of the inner optical lens 230 is larger than that of the outer optical lens 260, and the outer optical lens 260 is fixed on the inner optical lens 230. Only the inner optical lens 230 on the area covered by the outer optical lens 260 has the light effect texture 235, and the outer optical lens 260 can cover all optical channels; or the diameter of the inner optical lens 230 is smaller than that of the outer optical lens 260, and the outer optical lens 260 covers the inner optical lens 230, but the inner optical lens 230 is far away from the outer optical lens 260. Therefore, after the incoherent light passes through the inner optical lens 230, a part of the light does not reach the outer optical lens 260. At this time, the outer optical lens 260 only partially covers the optical channel.

[0033] In another embodiment, a reflective deflection optical channel is formed between the inner optical lens 230 and the outer optical lens 260, and the inner optical lens 230 is outside the coverage area of ​​the outer optical lens 260, and the incoherent light reflector enters the outer optical lens 260. At this time, only a portion of the optical channel formed by the inner optical lens 230 and the outer optical lens 260 is covered by the outer optical lens 260.

[0034] In this embodiment, the nebula pattern 265 is disposed on the inner side of the outer optical lens 260 , but is not limited thereto. The nebula pattern 265 may also be disposed on the outer side of the outer optical lens 260 .

[0035] In this embodiment, the lens surface 232 is a plane, on which the light effect lines 235 are arranged, the convex surface 234 is convex in the direction away from the lens surface 232 and has no lines, and the lens surface 232 is above the convex surface 234, but it is not limited thereto. In other embodiments, the inner optical lens 230 can also be arranged so that the light effect lines 235 are on the convex surface. In other embodiments, the inner optical lens 230 has two convex surfaces, and the light effect lines 235 can be arranged on any one of the convex surfaces; or the inner optical lens 230 has a plane at the bottom and a convex surface at the top, and the light effect lines 235 are on the convex surface or on the plane; or the light effect lines 235 are engraved inside the inner optical lens 230 by laser inner engraving.

[0036] like Figure 1 and Figure 2 As shown, the central area of ​​the lens base 280 has a circular hole, and the circular hole is provided with an inner lens mounting portion 282. In this embodiment, the inner lens mounting portion 282 is a receiving groove 2821 circumferentially arranged in the circular hole and extending upward toward the center of the circle, and an inner hook 2823 arranged around the circular hole adjacent to the receiving groove 2821, and an accommodating side wall portion 2822 extending upward from the receiving groove 2821. The accommodating groove 2821 can limit the vertical downward displacement of the inner optical lens 230, the accommodating side wall portion 2822 can limit the horizontal displacement of the inner optical lens 230, and the inner hook 2823 can limit the vertical upward displacement of the inner optical lens 230.

[0037] In another embodiment, the inner optical lens 230 and the lens base 280 may be movably connected, using gears or other connection structures, so that the inner optical lens 230 and the lens base 280 can rotate relative to each other.

[0038] like Figure 3As shown, the utility model also provides a starry sky projection device with a nebula lens module, including an outer optical lens 260 with a nebula pattern 265 structure, an inner optical lens 230 with a light effect pattern 235, the light effect pattern 235 has an irregular shape and protrusions of different sizes, an incoherent light source 130, an incoherent light control unit 310 and a power supply unit 450, and an additional driving member 410 and a driving control unit 405. The driving control unit 405 can control the driving member 410, and the driving member 410 can drive the inner optical lens 230 and the outer optical lens 260 to rotate around at least one rotation axis.

[0039] The incoherent light control unit 310 can control the incoherent light source 130 to change the coherent light it emits, including but not limited to controlling the color of the light, the intensity of the light, and the frequency of the color change of the light. The power supply unit 450 delivers energy to the incoherent light control unit 310 and the incoherent light source 130. The power supply unit 450 can be a battery, an energy storage device, a power supply interface, an AC / DC conversion unit, etc.

[0040] The incoherent light generated by the incoherent light source 130 illuminates the inner optical lens 230. The incoherent light passes through the inner optical lens 230. When the inner optical lens 230 rotates, under the action of the inner optical lens 230 and the light effect pattern 235, the incoherent light produces a dynamic change, and then passes through the outer optical lens 260 with the nebula pattern 265. Under the action of the structure of the outer optical lens 260 itself and the nebula pattern 265, it produces dynamic changes again. Therefore, the generated nebula has dual dynamics, and the projected nebula has rich dynamic effects. Compared with the existing technology, the projection effect of the nebula with dual dynamics can meet the user's viewing needs to a greater extent.

[0041] In this embodiment, the incoherent light source 130 is an LED light source, which generates incoherent light, but is not limited thereto. The incoherent light source 130 may also be other light sources that can generate incoherent light.

[0042] In another embodiment, the driving member 410 drives the incoherent light source 130 to rotate.

[0043] like Figure 4 As shown, this is the second embodiment of the starry sky projection device, including an outer optical lens 260 with a nebula pattern 265 structure, an inner optical lens 230 with a light effect pattern 235, an incoherent light source 130, an incoherent light control unit 310 and a power supply unit 450, a diffractive optical element 270, a coherent light source assembly 140 and a coherent light master control 315, the coherent light source assembly 140 is a coherent light source, a driving component 410 and a driving control unit 405.

[0044] In another embodiment, the control is integrated so that the electronic control unit 300 can control the incoherent light source 130 , the coherent light source assembly 140 , and the driving member 410 .

[0045] The diffractive optical element 270 is disposed on the outer optical lens 260, and the driving member 410 can drive the outer optical lens 260 and the inner optical lens 230 to rotate around at least one rotation axis, thereby driving the diffractive optical element 270 to rotate. The coherent light generated by the fixed coherent light source is irradiated on the diffractive optical element 270 that rotates following the outer optical lens 260. Since the diffractive optical element 270 is disposed on the outer optical lens 260, when the driving member 410 drives the outer optical lens 260 to rotate, the diffractive optical element 270 will produce a movement that accompanies the rotation of the outer optical lens 260.

[0046] In other embodiments, a differential member is further included, which connects the inner optical lens and the outer optical lens. The driving member drives the differential member to make the inner optical lens and the outer optical lens rotate around at least one rotation axis at different speeds.

[0047] like Figure 5 As shown, this is the third embodiment of the starry sky projection device, including an outer optical lens 260 with a nebula pattern 265 structure, an inner optical lens 230 with a light effect pattern 235, an incoherent light source 130, a diffraction optical element 270, a first coherent light source 1401, the first coherent light source 1401 is a coherent light source, an electric control unit 300, a power supply unit 450, a reflector 240 and a rotating axis conversion component 245.

[0048] The rotation axis conversion member 245 connects the outer optical lens 260 and the inner optical lens 230 so that the outer optical lens 260 and the inner optical lens 230 can rotate around different rotation axes.

[0049] The incoherent light source 130 and the outer optical lens 260 are arranged on one side of the inner optical lens 230, and the reflector 240 is arranged on the other side of the inner optical lens 230. The inner optical lens 230 is close to the reflector 240. The incoherent light first passes through the inner optical lens 230, shines on the reflector 240, is reflected by the reflector 240, and then passes through the outer optical lens 260. At this time, the light path presents several broken lines.

[0050] In other embodiments, the incoherent light source 130, the inner optical lens 230 and the outer optical lens 260 are coaxially arranged, and the reflective member 240 can also be replaced by a layer of reflective material arranged on the inner optical lens 230 to achieve a similar effect.

[0051] like Figure 6 and Figure 7 As shown, this is the fourth embodiment of the starry sky projection device, and a diffractive optical element 270 is provided on the outer optical lens 260.

[0052] The projection device includes at least one shell and at least one base in contact with the shell, an upper shell 500, a lower shell 520 and a base 540. A control button 522 connected to the electronic control unit 300 is operably provided on the lower shell 520. The projection device can be adjusted through the control button 522, including but not limited to turning the projection device on and off, adjusting the nebula color, adjusting the breathing mode, forward and reverse rotation, etc.

[0053] A luminous lampshade 505 is provided on the periphery of the outer optical lens 260. The luminous lampshade 505 can emit soft light independently and can be used as a night light, atmosphere light, or illumination light.

[0054] An indicator light 523 is provided on the lower shell 520, and the indicator light 523 can indicate including but not limited to the power switch of the projection device, the adjustment mode, etc. A plurality of heat dissipation holes 545 are provided on the lower shell 520, and the heat dissipation holes 545 connect the internal space of the lower shell 520 with the outside world, which helps to dissipate the heat inside the projection device.

[0055] The projection assembly also includes a wireless module 525, which can cooperate with the controller to realize remote control of the projection device.

[0056] like Figure 6 and Figure 8 As shown, an optical element mounting hole 2602 is provided on the outer optical lens 260, and the optical element mounting hole 2602 passes through the outer optical lens 260. An optical element mounting surface 2603 is provided in the circumference of the optical element mounting hole 2602, and an optical element positioning portion 2604 extends in the circumference of the optical element mounting surface 2603 toward the direction close to the outer lens joint portion 267. An optical element mounting portion 271 is provided in the circumference of the diffractive optical element 270.

[0057] In this embodiment, the nebula lines 265 include curved strip lines 2651 and vertical strip lines 2652. The curved strip lines 2651 have a similar elongated curved stripe appearance, and the radial size of the curved strip lines 2651 gradually decreases as they approach the top of the outer optical lens 260. In other embodiments, the number of curved strip lines 2651 and vertical strip lines 2652 can be a number that satisfies the display effect, and have other irregular shapes and arrangements that are not related to each other.

[0058] The first coherent light source 1401 is a coherent light source that can generate coherent light to be irradiated toward the diffractive optical element 270 .

[0059] The optical element mounting portion 271 has an outer shape that is compatible with the optical element mounting surface 2603, and the optical element mounting surface 2603 can cover the optical element mounting portion 271. In the present embodiment, the diffractive optical element 270 is a circular grating, and the diffractive optical element 270 is fixed on the external optical lens 260 by using hot melt adhesive between the optical element mounting portion 271 and the optical element mounting surface 2603.

[0060] In other embodiments, the diffractive optical element 270 may also be a grating sheet with other shapes, or may be other components that generate light spots after being irradiated by a coherent light source. In addition to using hot melt adhesive for fixed connection, a mechanical clamp may be used to fix the diffractive optical element 270 and the optical element. Other methods such as adhesives and screws may also be used for fixed connection.

[0061] The base 540 is separable from the lower shell 520. Since the lower shell 520 is semicircular, the base 540 has an arc that fits the surface of the lower shell 520. The lower shell 520 can be deflected at a certain angle on the base 540, thereby changing the projection angle of the projection device.

[0062] like Figure 6 , Figure 7 , Fig. 9 and Fig.10 As shown, a positioning mounting ring 510 is provided with a positioning mounting portion 5102, and the positioning mounting portion 5102 is a first coherent light source 1401 and a second coherent light source 1402. Both the first coherent light source 1401 and the second coherent light source 1402 are coherent light sources, and the bracket mounting body 515 and the driving member 410 provide installation space.

[0063] In this embodiment, the first coherent light source 1401 and the second coherent light source 1402 are monochromatic laser diodes, and the two monochromatic laser diodes have different models and can generate coherent light of different colors, but not limited to this. In other embodiments, the first coherent light source 1401 and the second coherent light source 1402 can emit multi-color light.

[0064] A switch is provided corresponding to the control button 522 on the electric control unit 300, and the corresponding function is realized by triggering the switch through the control button 522, including but not limited to turning on and off the projection device, adjusting the nebula color, adjusting the breathing mode, forward and reverse rotation, etc.

[0065] like Figure 7 and Figure 8As shown, since the outer optical lens 260 is connected to the inner optical lens 230 through the lens base 280, when the driving member 410 drives the lens base 280 to rotate, it will drive the outer optical lens 260 to rotate. When the outer optical lens 260 rotates, due to the existence of the nebula pattern 265, the light emitted by the incoherent light source 130 will produce different dynamic changes. When the inner optical lens 230 rotates, due to the existence of the light effect pattern 235, the light effect pattern 235 has irregular shapes and protrusions of different sizes, and the light emitted by the incoherent light source 130 will once again produce different dynamic changes. Therefore, the nebula in this embodiment has dual dynamics, and the projected nebula has rich dynamic effects.

[0066] In another embodiment, only the outer optical lens 260 rotates, and the nebula produces dynamic changes based on the rotation of the outer optical lens 260 .

[0067] In another embodiment, only the inner optical lens 230 rotates, and the nebula produces dynamic changes based on the rotation of the inner optical lens 230 .

[0068] In other embodiments, chain drive, belt drive, hydraulic drive, pneumatic drive or other transmission methods may be used between the driving member 410 and the matching portion 420 .

[0069] In other embodiments, the driving member 410 may also be an internal combustion engine, a steam engine, and the power source of the driving member 410 may be chemical energy, wind power, water power, manpower, thermal energy, or magnetism.

[0070] In another embodiment, by setting an active structure between the electric control unit 300 and the incoherent light source 130, the electric control unit 300 can change the angle of light generated by the incoherent light source 130 by controlling the active mechanism. Due to the change in angle and the changes brought about by the rotation of the lens module, the nebula produces a triple dynamic effect.

[0071] In this embodiment, the inner optical lens 230 is installed between the outer optical lens 260 and the incoherent light source 130. The light emitted by the incoherent light source 130 first passes through the inner optical lens 230 and then passes through the outer optical lens 260. Therefore, the light path in this embodiment is approximately straight (without considering the deflection phenomenon when the light passes through the lens). In other embodiments, the light path can be made into a broken line by reflection.

[0072] In this embodiment, the diffractive optical element 270 is a circular grating plate. In other embodiments, the diffractive optical element 270 can be other shapes and have a number greater than one.

[0073] like Figure 7 and Fig.10As shown, the lens base 280 is positioned in the positioning mounting ring 510 , and a driving part that can cooperate with the driving member 410 is circumferentially provided on the lens base 280 . There is a certain gap between the lens base 280 and the positioning mounting ring 510 , so that the lens base 280 can be smoothly driven to rotate by the driving member 410 .

[0074] In this embodiment, the driving member 410 is a motor, the power source of the driving member 410 is electrical energy, and the lens base 280 is provided with an internal gear that matches the driving member 410. In other embodiments, the driving member 410 can be two motors, and the outer optical lens 260 and the inner optical lens 230 are respectively connected to a motor to drive the outer optical lens 260 and the inner optical lens 230 respectively, so that the two rotate asynchronously or either one rotates alone.

[0075] like Figure 7 , Figure 8 and Fig.10 As shown, in this embodiment, the first coherent light source 1401 and the second coherent light source 1402 are installed at a certain angle to the rotation axis of the external optical lens 260, so that the coherent light generated by the coherent light source is obliquely irradiated on the diffractive optical element 270. In another embodiment, the first coherent light source 1401 and the second coherent light source 1402 are installed at a parallel angle to the rotation axis of the external optical lens 260, so that the coherent light generated by the coherent light source is vertically irradiated on the diffractive optical element 270.

[0076] like Fig.11 and Fig.12 As shown, the bracket mounting body 515 is mounted on the positioning mounting ring 510 through the positioning mounting portion 5102, and the incoherent light source 130 and the heat sink 132 are mounted on the bracket mounting body 515. The heat sink 132 can help dissipate the heat generated by the incoherent light source 130.

[0077] A base support portion 5156 is provided on the bracket mounting body 515 , and the base support portion 5156 supports the lens base 280 . Since the rotation of the lens base 280 will cause friction loss to the base support portion 5156 , the base support portion 5156 is made of wear-resistant material.

[0078] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A nebula lens module, characterized in that: comprising at least one outer optical lens and at least one inner optical lens; The outer optical lens comprises at least one thin-walled structure with an outward convex tendency, the thin-walled structure is provided with at least one layer of nebula patterns, and at least one optical channel is provided between the inner optical lens and the outer optical lens; The inner optical lens has a center, and the inner optical lens is provided with at least one convex surface, and the convex surface has a tendency to convex away from the center; The inner optical lens is provided with at least one layer of light effect patterns, at least a portion of the light effect patterns are located in the optical channel, and at least a portion of the outer optical lens covers the optical channel.

2. The nebula lens module according to claim 1, characterized in that: The outer side of the thin-walled structure has at least one smooth outer surface, the nebula pattern is arranged on the inner side of the thin-walled structure, the inner optical lens is further provided with at least one lens surface, and the light effect pattern is arranged on the lens surface.

3. The nebula lens module according to claim 2, characterized in that: The lens surface is arranged on the side close to the nebula pattern, and the convex surface is arranged on the side far away from the nebula pattern. The lens surface is a plane.

4. The nebula lens module according to claim 1, characterized in that: It also includes at least one lens base, on which at least one outer lens mounting portion and at least one inner lens mounting portion are provided, the outer optical lens is connected to the lens base via the outer lens mounting portion, and the inner optical lens is connected to the lens base via the inner lens mounting portion; The outer optical lens is provided with at least one outer lens joint portion in a circumferential direction away from the thin-walled structure, and the outer lens joint portion is combined with the outer lens mounting portion to connect the outer optical lens to the lens base; The central area of ​​the lens base has at least one opening, the inner lens mounting portion is arranged circumferentially around the opening, and the inner optical lens and the outer optical lens are arranged coaxially.

5. A starry sky projection device with a nebula lens module, characterized in that: The invention comprises at least one incoherent light source, at least one driving member and at least one nebula lens module as claimed in any one of claims 1 to 4, wherein the driving member can drive the nebula lens module to rotate around at least one rotation axis, the nebula lens module is positioned on the optical path of the incoherent light source, and the nebula lens module comprises at least one outer optical lens and at least one inner optical lens; The outer optical lens comprises at least one thin-walled structure with an outward convex tendency, the thin-walled structure is provided with at least one layer of nebula patterns, and at least one optical channel is provided between the inner optical lens and the outer optical lens; The inner optical lens has a center, and is provided with at least one convex surface, which has a tendency to convex outward away from the center. The inner optical lens is provided with at least one layer of light effect texture, at least a part of the light effect texture is located in the optical channel, and at least a part of the outer optical lens covers the optical channel.

6. The starry sky projection device with a nebula lens module according to claim 5, characterized in that: It also includes at least one coherent light source. At least one diffractive optical element is arranged on the outer optical lens. The coherent light source can generate coherent light that irradiates the diffractive optical element.

7. The starry sky projection device with a nebula lens module according to claim 5, characterized in that: It also includes a differential member, which connects the inner optical lens and the outer optical lens. The driving member drives the differential member to make the inner optical lens and the outer optical lens rotate around at least one rotation axis at different speeds.

8. The starry sky projection device with a nebula lens module according to claim 6, characterized in that: It also includes at least one lens base, on which an outer lens mounting portion and an inner lens mounting portion are provided; The outer optical lens is provided with an outer lens joint portion in the circumferential direction away from the thin-wall structure. The outer lens joint portion is combined with the outer lens mounting portion to connect the outer optical lens to the lens base. The inner optical lens is connected to the lens base through the inner lens mounting portion.

9. The starry sky projection device with a nebula lens module according to claim 8, characterized in that: It also includes a bracket mounting body and a positioning mounting ring, the bracket mounting body is fixedly connected to the positioning mounting ring, the incoherent light source is fixedly connected to the bracket mounting body, the coherent light source is fixedly connected to the positioning mounting ring, and the bracket mounting body supports the lens base; The central area of ​​the lens base is provided with an opening, the inner lens mounting portion is arranged circumferentially around the opening, and the incoherent light source, the inner optical lens and the outer optical lens are arranged coaxially.

10. The starry sky projection device with a nebula lens module according to claim 6, characterized in that: Also includes at least one power supply unit and an electric control unit, at least one housing and at least one base in contact with the housing; The power supply unit can deliver energy to the electric control unit, the driving element, the incoherent light source and the coherent light source. The electric control unit can control the driving element, the coherent light source and the incoherent light source. The electric control unit also includes at least one wireless module. The wireless module can cooperate with the controller to realize remote control of the projection device. The outer shell includes at least one lower shell and at least one upper shell. The base has at least one surface that fits the lower shell. The lower shell is fixedly connected to the upper shell. The outer shell provides installation space for coherent light sources, incoherent light sources, internal optical lenses, external optical lenses, and diffractive optical elements. At least one heat dissipation hole is provided on the lower shell, and the heat dissipation hole is connected to the outside world.

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