CN220651046U - Projection device - Google Patents

Abstract

The application discloses a projection device. The projection device comprises a first light emitting assembly and a driving device. The first light-emitting component comprises a base, a first light source, a water wave sheet and a first lens which are sequentially arranged along a first direction. The base includes a pivot axis. The first light emitting assembly further includes a bracket. The bracket is fixedly connected to the water wave sheet. The bracket is slidably and pivotally connected to the pivot shaft. The first light-emitting component is configured to enable light emitted by the first light source to be projected outside the projection device through the moire sheet and the first lens in sequence. The driving device is configured to allow the water wave sheet to periodically swing around the pivot shaft while reciprocating in a direction parallel to the pivot shaft, so that the water wave projection is a dynamic projection. By means of the technical scheme, complex dynamic projection can be achieved through a simple structure.

Description

Projection device

Technical Field

The present disclosure relates to projection systems, and particularly to a projection system.

Background

The projection device can project various patterns such as pictures, characters and the like with different colors into indoor and outdoor scenes such as curtains, walls, bridges, trees, water mist and the like, thereby being used for displaying, improving aesthetic feeling, baking atmosphere and the like.

Achieving a more colorful projection effect with as simple a construction as possible is a constantly sought-after goal for the person skilled in the art.

Disclosure of Invention

The utility model provides a projection device which realizes a richer projection effect by using a simple structure.

In order to solve the technical problems, the utility model adopts a technical scheme that: a projection apparatus is provided. The projection device comprises a first light emitting assembly and a driving device. The first light-emitting component comprises a base, a first light source, a water wave sheet and a first lens which are sequentially arranged along a first direction. The base includes a pivot axis. The first light emitting assembly further includes a bracket. The bracket is fixedly connected to the water wave sheet. The bracket is slidably and pivotally connected to the pivot shaft. The first light-emitting component is configured to enable light emitted by the first light source to be projected outside the projection device through the moire sheet and the first lens in sequence. The driving device is configured to allow the water wave sheet to periodically swing around the pivot shaft while reciprocating in a direction parallel to the pivot shaft, so that the water wave projection is a dynamic projection.

In contrast to the prior art, the present application makes the water wave sheet reciprocate in the pivoting direction and simultaneously oscillate around the pivoting direction by the driving device, thereby forming a richer projection effect with a simple structure.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort to those of ordinary skill in the art.

Fig. 1 shows a schematic block diagram of a projection device according to an embodiment of the present application.

Fig. 2 shows an exploded side view of the internal structure of the projection device of fig. 1.

Fig. 3 shows an exploded perspective view of the first light emitting assembly and the driving device of fig. 2.

Fig. 4 shows a perspective view of the corrugated sheet and the bracket.

Fig. 5 shows another perspective view of the corrugated sheet and the bracket.

Fig. 6 shows a perspective view of the first lens.

FIG. 7 illustrates a schematic diagram of the connection of a connecting rod and a drive shaft according to one embodiment.

Fig. 8 shows a perspective schematic view of the drive shaft and the wheel disc.

FIG. 9 illustrates a flow diagram of a method for generating dynamic projections, according to an embodiment.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring specifically to fig. 1, fig. 1 shows a schematic block diagram of a projection apparatus 1 according to an embodiment of the present application. As shown in fig. 1, the projection apparatus 1 includes a housing 11. The housing 11 defines an installation space 110. In some embodiments, the housing 11 includes a body portion 111 and a top cover portion 112. The body portion 111 and the top cover portion 112 may be integrally formed or may be detachably connected together. The first, second, third light emitting assemblies 10, 20, 30 and the driving device 40 are disposed in the installation space 110. The cover dome portion 112 may define at least one opening. A portion of at least one of the first, second, and third light emitting assemblies 10, 20, 30 may protrude from at least one opening to facilitate projection of light emitted by such assemblies into an external environment. In some embodiments, the cover dome portion 112 may include at least partially light transmissive portions to facilitate projection into the external environment. In fig. 1, the first, second, third and driving means 10, 20, 30 and 40 are schematically shown as dotted frames, respectively, which are not limited to their specific composition and shape.

In particular, the first lighting assembly 10 is configured to generate a dynamic moire projection, which may also be referred to as a dynamic moire projection assembly. By way of example and not limitation, the second light emitting assembly 20 is configured to generate a pattern projection and the third light emitting assembly 30 is configured to generate a starlight projection. The dynamic moire projection, pattern projection and starlight projection may be at least partially coincident to form a dynamic composite projection. For example, the pattern projection may be a projection of various fish patterns, and the three patterns may be combined to form a dynamic projection pattern in which fish moves in a lake water filled with starlight.

In particular, any of the dynamic moire projection, pattern projection and starlight projection described above may be projected from the projection device 1 along or generally along the first direction X shown in fig. 1.

In some embodiments, the projection apparatus 1 may also omit or not provide one or both of the second light emitting component 20 and the third light emitting component 30, which is not limited in this application.

In some embodiments, the second light emitting assembly 20 is disposed on one side of the first light emitting assembly 10, and the third light emitting assembly 30 is disposed on the other side of the first light emitting assembly 10.

In particular, the driving means 40 are configured to drive the movement of the water patch of the first lighting assembly 10, thereby generating the desired dynamic projection. For more details, please refer to the following description.

It will be appreciated by those skilled in the art that the projection device 1 may also include other components such as a power supply, a controller, a charging cord, etc. For example, the first, second, third and driving devices 10, 20, 30 and 40 may share the same power source, the same controller, etc.

With the projection device 1 in fig. 1, the present application can utilize a simple structure to project dynamic composite projections into indoor and outdoor scenes such as walls, bridges, screens, trees, water mist, etc., thereby performing dynamic display, improving aesthetic feeling, baking atmosphere, etc.

Referring to fig. 2 and 3, fig. 2 shows an exploded side view of the internal structure of the projection apparatus 1 in fig. 1, and fig. 3 shows an exploded perspective view of the first light emitting assembly 10 and the driving apparatus 40 in fig. 1. The structures of the first light emitting assembly 10, the driving device 40, the second light emitting assembly 20, and the third light emitting assembly 30 described above will be described in detail below with reference to fig. 2 and 3.

First light emitting component 10

As shown in fig. 2 and 3, the first light emitting assembly 10 includes a base 12, a first light source 18, a water stripe sheet 14, and a first lens 16 sequentially disposed along a first direction X. The first light emitting assembly 10 is generally arranged on a side of its base 12 facing the water blade 14.

Base 12

In some embodiments, the base 12 may be fixedly connected to the housing 11 of the projection device 1, for example, to the body portion 111 of the housing 11. The base 12 is, for example, a plate-like or dish-like base 12. The base 12 may be provided with at least one opening for heat dissipation, weight reduction, mounting or passing through other components, etc. Various connectors such as a buckle, a concave/convex part, a screw seat and the like can be arranged on the base 12 and used for connecting with the first light source 18, the shell 11 of the projection device 1, the driving device and the like. In some embodiments, a heat dissipating device, such as a heat sink, may be provided on the base 12 to help transfer heat generated by the first light source 18, the driving device, and the like. The base 12 may also be provided with a controller, a circuit board, etc., which is not limited in this application.

Specifically, the base 12 includes a pivot axis 122. The pivot axis 122 may be at least one linear shaft parallel to the plane of the base 12. As shown in fig. 3, the pivot axis 122 may be arranged offset a distance from the plane of the base 12 in the direction of the water blade 14 in order to mount the bracket 13 of the first lighting assembly 10. The pivot shaft 122 in fig. 2 includes a first shaft 1221 and a second shaft 1222 aligned along a common line. In some embodiments, the pivot shaft 122 may also be disposed within an opening in the base 12.

Bracket 13

As shown in fig. 2 and 3, the first light emitting assembly 10 further includes a bracket 13. The bracket 13 is configured to be fixedly connected to the water blade 14. The bracket 13 is slidably and pivotally connected to the pivot shaft 122.

The bracket 13 may be configured to have various suitable shapes. The support 13 shown in fig. 2 and 3 is a hollow cylinder or column. The hollow cylinder and the base 12 can together define a receiving space. The first light source 18 may be at least partially disposed in the accommodating space. In this case, the hollow cylinder may be used to protect the first light source 18 from outside air, moisture, etc. The hollow column body can also prevent air heated by the first light source 18 from flowing between the first light source 18 and the water wave sheet 14, keep the temperature in the accommodating space substantially uniform, and prevent air flow and temperature change from affecting projection quality. The cross section of the hollow cylinder may be rectangular, circular, oval, etc., which is not limited in this application.

The bracket 13 may include a first end remote from the base 12 and an opposite second end. The water blade 14 is attached to a first end of the bracket 13. For example, in the case that the bracket 13 is a hollow cylinder, the periphery of the water wave sheet 14 is fixedly connected to a first end of the hollow cylinder, and a second end of the hollow cylinder is open toward the base 12.

The bracket 13 may further comprise a ledge 131 at a second end opposite the first end. The lugs 131 of the bracket 13 may define pivot holes 132. When mounting the bracket 13 to the base 12, the pivot shaft 122 may be threaded into the pivot hole 132 to allow the pivot shaft 122 to slide and rotate within the pivot hole 132. As shown in fig. 3, the bracket 13 may include two opposing lugs 131 at the second end. The first shaft 1221 and the second shaft 1222 may be respectively inserted into one of the two lugs 131. In some embodiments, the thickness of the lugs 131 may be large enough to ensure that the length of the pivot holes 132 is long enough to ensure that the bracket 13 is reliably supported by the pivot shaft 122, ensuring rotational stability of the bracket 13. The pivot hole 132 may be internally nested with a bushing within which the pivot shaft 122 is threaded. The sleeve is made of metal, for example, so as to reduce friction and strengthen the strength of the lug 131.

The bracket 13 further includes a link 133, and the link 133 is fixedly connected to the bracket 13. The link 133 may be integrally formed with the body of the bracket 13.

As shown in fig. 3, the link 133 may include a first end coupled to the body of the bracket 13 and an opposite second end. The first end of the link 133 is connected to the body of the bracket 13, for example, on the side of the bracket 13 adjacent to the water blade 14. A second end of the link 133 may be connected to the driving device 40, for example, to enable coupling of the driving device 40 with the bracket 13. The specific connection position of the link 133 to the main body of the bracket 13 is not limited in this application.

In some embodiments, the link 133 may be made of some material having a greater strength and/or density than the body of the bracket 13 to enhance the reliability of the link 133 and to enhance the ability of the link 133 to move the bracket 13. For example, the body of the bracket 13 may be made of plastic, and the link 133 may be made of a metal material. In some embodiments, a portion of the link 133 may extend and be embedded within the bracket 13, such as up to at least one lug 131. For example, at least one of the lugs 131 may form a portion of the link 133. This arrangement enhances the ability of the link 133 to move the bracket 13 and enhances the useful life of the bracket 13.

Water wave sheet 14

Referring to fig. 4 and 5, fig. 4 and 5 show schematic structural views of the water pattern sheet 14 and the bracket 13, respectively. As shown in fig. 4 and 5, the water wave sheet 14 includes a base sheet 141 and a plurality of projections 142. The substrate 141 has a shape forming a part of an ellipsoid. The substrate 141 may, for example, have a uniform thickness. The substrate 141 is attached at its periphery to a first end of the bracket 13. A plurality of bosses 142 are provided on a side of the substrate 141 facing the first light source 18. At least some of the lobes 142 are, for example, polyhedral, rounded lobes, and/or arcuate lobes, etc. At least some of the bosses 142 are adjacent on the substrate 141. Adjacent bosses 142 have adjacent edges on substrate 141 therebetween. Light from the first light source 18 may form at least part of the moire projection through these adjacent edges. At least some of the bosses 142 also include apexes through which light from the first light source 18 may pass to form spots of significantly different brightness than the surroundings.

In some embodiments, the water wave sheet 14 and the bracket 13 are fixedly connected together, e.g., integrally formed, and may be collectively referred to as a water wave transparent member.

First light source 18

As shown in fig. 3, the first light source 18 includes a lamp holder 181, a light emitter 182, and a condenser 183. In some embodiments, the first light source 18 includes a lamp base 181, at least two light emitters 182, and at least two concentrators 183. The lamp socket 181 may be fixed to the base 12, for example. The light emitters 182 are fixed to the lamp sockets 181 and protrude at least partially into the corresponding light concentrators 183. As shown in fig. 2, the condenser 183 may be, for example, a cone with both ends open. The light emitter 182 may extend into the cone, for example, from a smaller opening of the cone. The cone may reflect light from the light emitter 182 to direct it to the water blade 14.

In some embodiments, the lamp socket 181 may further include a heat sink. The heat sink may, for example, include a thermally conductive line, a fan, etc., which is not limiting in this application.

The light emitter 182 may be, for example, various types of lamps such as LED lamps, halogen lamps, energy saving lamps, etc., and the specific kind of the light emitter 182 is not limited in this application. In some embodiments, the light emitter 182 may be multiple, such as two, three, etc., as this application is not limiting.

As shown in fig. 3, the corresponding light emitters 182 and light concentrators 183 may be mounted, for example, within a cylindrical cartridge.

The light emitted by the first light source 18 can be projected to the projection device 1 through the moire sheet 14 and the first lens 16 in sequence to form moire projection.

First lens 16

Referring to fig. 6, the first lens 16 includes a partial spherical shell-like body 161 and a plurality of belt-like protrusions 162 provided inside the partial spherical shell-like body 161. In particular, a portion of the spherical shell-like body 161 may have a dome shape, which may be formed as part of the spherical shell. Alternatively, a portion of the spherical shell-like body 161 may have a uniform thickness. A plurality of band-like or strip-like projections may be provided inside a part of the spherical shell-like body 161, i.e., on the side facing the water wave sheet 14. Specifically, a portion of the spherical shell-shaped body 161 and the plurality of belt-shaped protrusions 162 may be integrally formed. The light from the first light source 18 may obtain more varied water patterns after passing through the first lens 16.

In some embodiments, the first lens 16 may be rotated during operation of the projection device 1, thereby helping to generate more rich dynamic projections.

In some embodiments, the first lens 16 may be part of the top cover portion 112 of fig. 1. In some embodiments, the first lens 16 may protrude from an opening defined by the top cover portion 112 to the outside of the mounting space 110, as this application is not limited in this regard. In some embodiments, the first lens 16 may be mounted on the top cover portion 112, for example.

Drive device 40

The driving device 40 is configured to drive the water wave sheet 14 to periodically oscillate around the pivot axis 122 while reciprocating in a direction parallel to the pivot axis 122, so that the water wave projection is a dynamic projection.

Specifically, as shown in fig. 3, the driving device 40 includes a motor 41, a wheel 42, and a driving shaft 43. The wheel disc 42 and the drive shaft 43 are fixedly connected together. The motor 41 is drivingly connected to the wheel 42 and is configured to rotate the wheel 42 and the drive shaft 43. For example, as shown in FIG. 3, the motor shaft of motor 41 is drivingly connected to wheel 42 through an aperture in base 12 to rotate wheel 42.

The motor 41 may be, for example, an electric motor, which may be fixed to the housing 11 of the projection device 1 or the base 12 described above. The output shaft of the motor 41 may be connected to the wheel 42, for example, by a transmission such as a gear set, belt, or the like, to drive the wheel 42 in rotation. The present application is not limited in this regard. In some embodiments, the projection device 1 may control parameters such as the rotational speed of the motor 41, for example, by a controller (not shown) upon command.

The wheel disc 42 may, for example, have a disk shape or other shape, as not limited in this application. The wheel 42 is rotatable about its rotation center line by the motor 41. The rotational centerline of the wheel disc 42 may be parallel or substantially parallel to the first direction X. A wheel 42 may be disposed at one side of the first light emitting assembly 10 to facilitate movement of the driving bracket 13 and the water blade 14. In some embodiments, as shown in fig. 3, the motor 41 and the wheel 42 are disposed on both sides of the base 12, respectively. The particular manner of mounting the disc 42 is not limited by this application.

The drive shaft 43 is fixedly connected to the wheel disc 42 at a distance from a rotational centerline of the wheel disc 42 and is configured to rotate with the wheel disc 42. The drive shaft 43 is a linear shaft. A first end of the drive shaft 43 is connected to a side of the disc 42 adjacent the water blade 14. An opposite second end of the drive shaft 43 is movably connected to a link 133 of the bracket 13. When the driving shaft 43 rotates together with the wheel disc 42, the second end of the driving shaft 43 moves along a circle, which may be parallel to the plane of the base 12, for example.

In some embodiments, the drive shaft 43 is configured to adjust the distance of the drive shaft 43 from the rotational centerline of the wheel disc 42. For example, a plurality of mounting locations may be provided on the wheel 42 at different distances from the center line of rotation of the wheel 42. The drive shaft 43 may be selectively disposed in one of the mounting locations, such as by a snap fit, threaded connection, or other means. Different mounting positions correspond to different lateral movement distances and swing amplitudes of the water blade 14. By providing a plurality of mounting positions, a user can be allowed to adjust the movement range of the water wave sheet 14 by changing the mounting position of the driving shaft 43 so as to meet the requirements of different application scenes.

Coupling of the first light emitting component 10 to the drive device 40

Specifically, the link 133 of the bracket 13 is slidably connected to the drive shaft 43.

Referring to fig. 7, fig. 7 illustrates one manner of connection of the link 133 to the drive shaft 43. In some embodiments, the second end of the drive shaft 43 is a spherical end 431 or a ball head. The ball head may be, for example, a complete sphere or a portion of a complete sphere, such as a hemisphere or a partial sphere between a hemisphere and a complete sphere. Correspondingly, the second end of the link 133 defines a spherical recess 1331 or socket. When the drive shaft 43 and the link 133 are coupled, the spherical end 431 is received or embedded in the spherical recess 1331.

When the spherical end 431 is received in the spherical recess 1331, the spherical end 431 may slide and/or oscillate in the spherical recess 1331. In some embodiments, the spherical end 431 and the wall defining the spherical recess 1331 are attracted to each other by magnetic action. Specifically, one of the walls of the spherical end 431 and the spherical recess 1331 includes a magnet, and the other includes a magnetic body that can be attracted by the magnet, such as a ferromagnetic metal. By providing the spherical end 431 as a partial sphere, the spherical end 431 can be easily removed from the spherical recess 1331. The magnetic force may facilitate a closer fit of the walls of the spherical recess 1331 to the spherical end 431, thereby providing a tighter coupling of the link 133 to the drive shaft 43, and a better follow-up of the movement between the link 133 and the drive shaft 43, thereby providing a more predictable movement of the link 133, and thus the bracket 13 and the water blade 14.

The driving shaft 43 eccentrically rotates around the rotation axis of the wheel disc 42, and the bracket 13 and the water blade 14 are periodically swung around the pivot shaft 122 while reciprocally moving along the pivot shaft 122 by the link 133. Specifically, the spherical end 431 of the drive shaft 43 is horizontally rotationally movable in a plane. By coupling the spherical end 431 with the spherical recess 1331, the spherical recess 1331 and the entire link 133 are driven to move horizontally in a plane. The link 133 in turn drives the bracket 13 and the water blade 14 to slide reciprocally along the pivot shaft 122 while periodically swinging about the pivot shaft 122. For example, the lugs 131 of the bracket 13 slide on the pivot shaft 122 while the bracket 13 swings about the pivot shaft 122.

In some embodiments, when the spherical end 431 is or includes a magnet, the tip P or outermost portion of the spherical end 431 is a magnetic pole, and when the wall of the spherical recess 1331 is or includes a magnet, the bottommost portion B of the spherical recess 1331 is a magnetic pole. Preferably, the magnet is a hard magnet. The magnetic force lines at the magnetic poles are the most dense and the magnetism is the strongest. Setting the tip P of the spherical end 431 or the bottommost B of the spherical recess 1331 as a magnetic pole makes the state when the tip P of the spherical end 431 is in contact with the bottommost B of the spherical recess 1331 the most stable state, which corresponds to the center of the oscillating movement of the water blade 14, thereby facilitating the return movement of the oscillating link 133 or the water blade 14 toward the center of the oscillating movement, and reducing the possibility of jamming of the oscillating movement.

As another example, referring to fig. 4, the second end of the link 133 defines a tapered bore 1335. The first diameter of the opening of the side of the tapered bore 1335 facing the base 12 is greater than the second diameter of the opening of the side of the tapered bore 1335 facing the first lens 16. A second end of the drive shaft 43 is disposed through the tapered bore. Specifically, referring to fig. 8, fig. 8 shows a perspective schematic view of the driveshaft and the wheel disc. Wherein the drive shaft 43 may comprise a first section 432 and a second section 433 connected to each other. The second end of the link 133 is located on a side of the second section 433 remote from the first section 432. The third diameter of the first section 432 is greater than the fourth diameter of the second section 433. Specifically, the fourth diameter is smaller than the second diameter such that the second section 433 of the link 133 may pass through the tapered bore 1335. And the third diameter is greater than the second diameter such that the first section 432 of the link 133 cannot pass through the tapered bore 1335. Tapered bore 1335 may facilitate oscillation of link 133.

Second light emitting component 20

In some embodiments, the projection device 1 comprises a second light emitting assembly 20. As shown in fig. 1, the second light emitting assembly 20 includes a second light source 21, a film 22 including a pattern, and a second lens 23, which are sequentially disposed along the first direction X. The second light emitting assembly 20 is configured to cause light emitted from the second light source 21 to be projected out of the projection device 1 through the film 22 and the second lens 23 in order to form a pattern projection corresponding to the pattern of the film 22.

In particular, the second light source 21 may be an LED light, a cold light source, or an assembly of other light sources, which is not limited in this application. The second light source 21 may, for example, include a light emitting element, a condensing and light collimating device, etc., such that the second light source 21 emits light toward the film 22 and then through the film 22. The film 22 may be a film or the like including a pattern. The pattern may be formed, for example, by recesses, protrusions, perforations, or the like on the film 22. The second lens 23 may be, for example, a convex lens. In some embodiments, at least a portion of the second lens 23 may protrude from an opening of the cover dome portion 112, for example.

In some embodiments, the second light assembly 20 may further include a device for driving the film 22 to rotate or otherwise move, as the application is not limited in this regard.

In particular, the pattern projection corresponding to the pattern of film 22 may at least partially coincide with the dynamic moire projection. In some embodiments, the pattern projection may fall entirely within the watermark projection.

Third light emitting component 30

In some embodiments, as shown in fig. 1, the projection device 1 comprises a third light emitting assembly 30. The third light emitting assembly 30 includes a third light source 31 and a third lens 32 sequentially disposed along the first direction X.

Specifically, the third light source 31 is a laser light source. The third lens 32 is a grating. The grating includes a plurality of transparent portions and opaque portions spaced apart from one another.

The third light emitting assembly 30 is configured to project the laser light emitted from the third light source 31 to the projection apparatus 1 through the third lens 32 to form a starlight projection.

The third light emitting assembly 30 further includes other components such as a heat dissipating component, which is not limited in this application.

In particular, the starlight projection may at least partially coincide with the dynamic moire projection. In some embodiments, the starlight projection may fall entirely within the water wave projection.

Method for generating dynamic projection

Referring to fig. 9, fig. 9 illustrates a method of generating dynamic projections according to an embodiment of the present application. As shown in fig. 9, the method includes the following steps.

Step S501: light from the first light source 18 is passed through the water patch 14.

Step S502: the driving water blade 14 reciprocates in the pivot direction while swinging about the pivot direction.

Step S503: the light after passing through the water patch 14 is made to pass through a first lens 16 to form a dynamic water projection.

In some embodiments, the method further comprises the following steps.

Step S504: light from the second light source 21 is projected into the moire projection through the film 22 including the pattern and the second lens 23 in sequence.

Step S505: laser light from a laser light source is projected into the dynamic moire projection through the grating.

One or more of the above steps S501, S502, S504 and S505 may be performed simultaneously, which is not limited in this application.

By the method, the method can combine dynamic water wave projection, pattern projection corresponding to the film 22 comprising the pattern and starlight projection corresponding to the laser light source to form colorful dynamic patterns.

The foregoing description is only of embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the present utility model.

Claims (10)

1. A projection apparatus, comprising:

the first light-emitting component comprises a base, a first light source, a water wave sheet and a first lens which are sequentially arranged along a first direction, wherein the base comprises a pivot shaft, the first light-emitting component further comprises a support, the support is fixedly connected to the water wave sheet and is slidably and pivotably connected to the pivot shaft, and the first light-emitting component is configured to enable light emitted by the first light source to sequentially pass through the water wave sheet and the first lens and be projected to the outline of the projection device for water wave projection; and

and a driving device configured to allow the water wave sheet to periodically swing around the pivot shaft while reciprocating in a direction parallel to the pivot shaft, so that the water wave projection is a dynamic projection.

2. The projection device of claim 1, further comprising:

the second light-emitting component positioned at one side of the first light-emitting component comprises a second light source, a film and a second lens which are sequentially arranged along the first direction,

the second light-emitting component is configured to enable light emitted by the second light source to be projected out of the projection device through the film and the second lens in sequence so as to form pattern projection corresponding to the pattern of the film.

3. The projection device of claim 2, further comprising:

a third light emitting assembly positioned at the other side of the first light emitting assembly, comprising a third light source and a third lens which are sequentially arranged along the first direction,

the third light source is a laser light source,

the third lens is a grating and comprises a plurality of transparent parts and opaque parts which are mutually spaced,

the third light emitting assembly is configured to enable laser emitted by the third light source to be projected outside the projection device through the third lens to form starlight projection.

4. The projection device of claim 1, wherein the projection device comprises a lens,

the moire pattern includes a substrate having a shape of a portion of an ellipsoid, and a plurality of protrusions provided at a side of the substrate facing the first light source.

5. The projection device of claim 4, wherein the projection device comprises a lens,

at least some of the raised portions include adjacent edges on the substrate configured to form at least a portion of the water wave projection.

6. The projection device of claim 1, wherein the projection device comprises a lens,

the driving device comprises a motor, a wheel disc and a driving shaft,

the motor is configured to rotate the wheel,

the drive shaft is fixedly connected to the wheel disc at a distance from a rotational centerline of the wheel disc and configured to rotate with the wheel disc,

the bracket further includes a link fixedly connected to the bracket, the link slidably connected to the drive shaft.

7. The projection device of claim 6, wherein the projection device comprises a lens,

the connecting rod defines a spherical recess, the drive shaft includes a spherical end received within the spherical recess, and the spherical end and a wall of the spherical recess are magnetically attracted to each other, an

The driving shaft rotates eccentrically around the rotating shaft of the wheel disc, and the connecting rod drives the bracket and the water wave sheet to periodically swing around the pivoting shaft while reciprocating along the pivoting shaft.

8. The projection device of claim 6, wherein the projection device comprises a lens,

the drive shaft is configured to adjust a distance of the drive shaft from a rotational centerline of the wheel disc.

9. The projection device of claim 1, wherein the projection device comprises a lens,

the support is a hollow cylinder, the hollow cylinder and the base jointly define a containing space, and the first light source is at least partially arranged in the containing space.

10. The projection device of claim 9, wherein the projection device comprises a lens,

the water wave sheet is connected with the first end of the bracket,

the bracket includes a lug at a second end opposite the first end,

the lugs define a pivot aperture which,

the pivot shaft is arranged in the pivot hole in a penetrating way so as to allow the pivot shaft to slide in the pivot shaft.