Projection device

Abstract

The utility model discloses a projection device, which comprises a base, and the base comprises an upward through opening and at least one fixing part exposed out of the opening; the light source assembly comprises a lamp panel and at least one lamp bead installed on the lamp panel, and the lamp panel is fixedly connected to the fixing part; the projection component is arranged above the lamp beads in a covering manner; the projection component comprises a transparent film, a main projection area and an auxiliary projection area, the main projection area and the auxiliary projection area are formed on the transparent film, the main projection area comprises a single-color area and / or a multi-color area and / or a transparent area, and light emitted by the lamp beads penetrates through the auxiliary projection area and the main projection area to form alternately-arranged projection patterns. The projection brightness of the main projection area is higher than that of the auxiliary projection area, light emitted by the lamp beads penetrates through the main projection area, the forming process is simple, the projection color is rich, and the use requirement is met.

Description

[Technical field]

[0001] The utility model relates to the technical field of projection devices, in particular to a projection device with a compact structure. [Background technology]

[0002] An existing projection device includes a fixed seat, a rotating disk and a lamp body mounted on the fixed seat, a motor driving the rotating disk to rotate, a hemispherical slide fixed to the rotating disk, and a frosted cover covering the outer side of the slide. The hemispherical slide includes a black ink area and a transparent area. The light emitted by the lamp body passes through the transparent area and is projected outward.

[0003] Because the hemispherical slide of the above structure has a single color, the molding process of multiple colors is complicated and the product defect rate is high.

[0004] Therefore, it is necessary to design a new projection device to overcome the above problems. [Utility Model Content]

[0005] In view of the problems faced by the background technology, the utility model provides a projection device in which a turntable is received in a first receiving groove of a base.

[0006] In order to achieve the above purpose, the utility model adopts the following technical means:

[0007] A projection device comprises: a base, comprising an opening penetrating upward and at least one fixed portion exposed upward from the opening; a light source assembly, comprising a lamp board and at least one lamp bead mounted on the lamp board, wherein the lamp board is fixedly connected to the fixed portion; a projection component, which is covered above the lamp bead; the projection component comprises a transparent film, a main projection area and an auxiliary projection area formed on the transparent film, wherein the main projection area comprises a monochrome area and / or a multi-color area and / or a transparent area, and light emitted by the lamp bead passes through the auxiliary projection area and the main projection area to form an alternately arranged projection pattern, wherein the projection brightness of the main projection area is higher than the projection brightness of the auxiliary projection area.

[0008] Furthermore, the projection device includes a turntable installed on the base, the base includes a limiting portion arranged around the opening, the limiting portion protrudes into the window of the turntable, the opening and the window are connected to each other up and down, the fixing portion and the limiting portion are separated or the limiting portion and the fixing portion are fixedly connected, the limiting portion constitutes a reinforcement rib of the fixing portion, and the light panel prevents the turntable from escaping from the first receiving groove of the base.

[0009] Furthermore, the projection device includes a turntable installed on the base, the base includes at least one positioning portion extending upward, the positioning portion is accommodated in the window of the turntable, the light board is pre-positioned and installed on the positioning portion, the fixing hole of the light board is aligned with the fixing portion up and down, the positioning portion is higher than the fixing portion, and the positioning portion passes upward through the positioning hole of the light board.

[0010] Further, the base includes a limiting portion arranged around the multiple fixing portions, the turntable is arranged around the limiting portion, the positioning portion is fixedly connected to the fixing portion or the positioning portion is fixedly connected to the limiting portion, the fixing portion constitutes a reinforcement rib of the positioning portion, or the limiting portion constitutes a reinforcement rib of the positioning portion.

[0011] Furthermore, the projection device includes a turntable installed on the base, the projection device includes a fixed frame installed on the turntable and the projection component installed on the fixed frame, the projection component constitutes a hollow conical structure, and the taper of the conical projection component is the same as the taper of the inner wall of the mounting hole of the fixed frame.

[0012] Further, the projection device includes a turntable installed on the base, the projection device includes a projection component covered above the lamp bead, the turntable includes a downwardly recessed limit groove and a blocking portion connected to the side wall of the limit groove, the limit groove is connected to the first receiving groove of the base in vertical communication, the projection component includes a main body, an extension portion connected to the main body, and a hook portion extending from the extension portion, the extension portion is received in the limit groove, the hook portion is located below the blocking portion, and the hook portion is downwardly exposed in the first receiving groove of the base.

[0013] Furthermore, the hook portion and the main body portion form a gap in the up and down directions, the blocking portion is accommodated in the gap, the curvature of the hook portion is the same as at least part of the curvature of the main body portion, or the center of the circle formed by the extension line of the hook portion is coaxial with the center of the main body portion.

[0014] Furthermore, the projection component includes a fixing frame and a projection film installed on the fixing frame, the fixing frame includes a mounting hole with a conical structure, the projection film is at least partially attached to the inner wall or outer wall of the mounting hole, and the projection film includes the transparent film, the main projection area and the auxiliary projection area arranged on the transparent film.

[0015] Furthermore, the base includes a first receiving groove formed by a downward recess and a second receiving groove arranged around the first receiving groove, and the projection device includes a turntable accommodated in the first receiving groove and the second receiving groove, there is a gap between the turntable and the first receiving groove in the up and down directions, and the turntable and the bottom wall of the second receiving groove are in contact with each other in the up and down directions.

[0016] Further, the projection component includes a plurality of hooks installed on the base, and the plurality of lamp beads change colors alternately; or the projection device includes a turntable installed on the base, the projection component includes a plurality of hooks installed on the turntable, and a motor assembly drives the turntable; or the projection component includes a plurality of hooks installed on the base, and a motor assembly drives the base to rotate; or the projection component is fixed to a rotating shaft of a motor assembly.

[0017] Compared with the prior art, the projection device of the utility model has the following beneficial effects:

[0018] An opening passing upward through the base and at least one fixed portion exposed upward from the opening; a light source assembly including a lamp board and at least one lamp bead mounted on the lamp board, the lamp board being fixedly connected to the fixed portion; a projection component, which is covered above the lamp bead; the projection component includes a transparent film, a main projection area and an auxiliary projection area formed on the transparent film, the main projection area including a monochrome area and / or a multi-color area and / or a transparent area, the light emitted by the lamp bead passes through the auxiliary projection area and the main projection area to form an alternating projection pattern, the projection brightness of the main projection area is higher than the projection brightness of the auxiliary projection area, the light emitted by the lamp bead passes through, the molding process is simple, the cost is low, and the projection color is rich.

Brief Description of the Drawings

[0019] Figure 1 It is a three-dimensional exploded view of the projection device of the first embodiment of the utility model;

[0020] Figure 2 for Figure 1 3D exploded view of the middle base and turntable;

[0021] Figure 3 for Figure 2 3D exploded view of the middle base;

[0022] Figure 4 for Figure 1 Top view of the center turntable installed on the base

[0023] Figure 5 for Figure 4 The cross-sectional view after cutting along line AA;

[0024] Figure 6 for Figure 5A partial enlarged view of middle b;

[0025] Figure 7 for Figure 1 A schematic diagram of the unfolded state of the slide in the middle;

[0026] Figure 8 for Figure 1 A schematic diagram of the slide in the rolled-up state;

[0027] Fig. 9 A three-dimensional diagram of a projection device according to a second embodiment of the present invention;

[0028] Fig.10 for Fig. 9 3D exploded view of

[0029] Fig.11 for Fig.10 A top view of the middle base and turntable;

[0030] Fig.12 for Fig.11 The cross-sectional view after cutting along the CC line;

[0031] Fig.13 for Fig.10 Exploded three-dimensional diagram of the middle base and turntable.

[0032] Description of the accompanying drawings of the specific embodiments:

[0033] Projection device 100 Base 1 First Shell 11 Speaker hole 111 Second Shell 12 The first receiving groove 121 The second receiving slot 122 Opening 123 Positioning unit 124 Fixing portion 125 Limiting unit 126 Spring arm 127 Card slot 128 Limiting part 129 Projection 130 Accommodation chamber 13 Motor assembly 2 Turntable 3 Window 31 Rotating shaft 32 Ring gear 33 Flange 34 Convex Hull 341 Limiting slot 35 Blocking part 36 Light source component 4 Light board 41 Lamp beads 42 Buckle hole 43 Fixed frame 5 Main body 51 Mounting hole 511 Extension 52 Hook 53 Slide 6 The first end portion 61 Base 611 Plug-in section 612 The second end portion 62 Matching part 621 Locking part 622 Upper end surface 63 Lower end surface 64 Slide 7 Center axis P Housing 8 Matrix 81 Connecting part 82 Block 83 Motherboard 200 [Specific implementation method]

[0034] In order to facilitate a better understanding of the purpose, structure, characteristics and functions of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods.

[0035] like Figures 1 to 8 As shown, the first embodiment of the projection device 100 of the utility model is shown, and the projection device 100 includes a base 1, a motor assembly 2 installed on the base 1, a light source assembly 4, a turntable 3, a fixing frame 5 installed on the turntable 3, a slide 6 and a slide 7 installed on the fixing frame 5, a shell 8 covering the slide 6 and a mainboard 200 installed on the base 1.

[0036] like Figure 1 , Figure 2 and Figure 3As shown, the base 1 includes a receiving cavity 13 and a first shell 11 and a second shell 12 forming the receiving cavity 13. The first shell 11 includes a plurality of speaker holes 111 penetrating its bottom surface from top to bottom. The second shell 12 includes a first receiving groove 121 formed by being recessed downward from its top surface, a second receiving groove 122 arranged around the first receiving groove 121, and an opening 123 penetrating upward through the bottom wall of the first receiving groove 121. The side wall of the first receiving groove 121 is connected to the bottom wall of the second receiving groove 122, that is, the side wall of the first receiving groove 121 and the bottom wall of the second receiving groove 122 form a step portion. The second shell 12 also includes at least one positioning portion 124, a fixing portion 125, a limiting portion 126, and an elastic arm 127 arranged around the opening 123. In this embodiment, the positioning portion 124, the fixing portion 125, the limiting portion 126, and the elastic arm 127 are formed by extending upward from the bottom wall of the first receiving groove 121. A plurality of the fixing portions 125 are arranged around the opening 123, the fixing portions 125 are arranged separately from the limiting portions 126 or the limiting portions 126 are fixedly connected to the fixing portions 125, and the limiting portions 126 constitute the reinforcing ribs of the fixing portions 125. The positioning portion 124 is arranged higher than the fixing portion 125. The positioning portion 124 is fixedly connected to the fixing portion 125 or the positioning portion 124 is fixedly connected to the limiting portions 126, the fixing portion 125 constitutes the reinforcing ribs of the positioning portion 124, or the limiting portions 126 constitute the reinforcing ribs of the positioning portion 124. The limiting portion 126 surrounds the outer sides of the positioning portion 124 and the fixing portion 125. A plurality of the elastic arms 127 arranged at intervals are located on a circumference of the same radius as the limiting portions 126. The elastic arms 127 are arranged toward the opening 123 or away from the opening 123. The base 1 further includes a card slot 128 formed by being recessed downward and a stopper 129 connected to the slot wall of the card slot 128. The card slot 128 is connected to the receiving cavity 13 in an up-and-down manner, and the stopper 129 is located above the connection between the card slot 128 and the receiving cavity 13. The motor assembly 2 is received in the receiving cavity 13 and includes a gear protruding upward into the first receiving slot 121. The base 1 includes a speaker mounted on the first shell 11, the speaker is aligned with the speaker hole 111 in an up-and-down manner, and the speaker at least partially protrudes upward into the opening 123.

[0037] like Figure 3 , Figure 5 and Figure 6As shown, the turntable 3 is downwardly received in the first receiving groove 121 and the second receiving groove 122. The turntable 3 includes a window 31 penetrating from top to bottom, a shaft portion 32 arranged outwardly in sequence around the window 31, a gear ring 33 and a flange 34. The shaft portion 32 is arranged around the limiting portion 126 or the limiting portion 126 is arranged around the shaft portion 32. When the turntable 3 is downwardly mounted in the first receiving groove 121, the plurality of elastic arms 127 are elastically deformed and abut against the shaft portion 32 to limit the radial displacement of the turntable 3. The gear ring 33 and / or the shaft portion 32 do not contact the bottom wall of the first receiving groove 121 downwardly. The flange 34 is received in the second receiving groove 122, and the flange 34 contacts the bottom wall of the second receiving groove 122 downwardly. The gear cooperates with the gear ring 33. In this embodiment, the flange 34 includes a plate portion and a plurality of spaced convex bumps 341 extending downward from the plate portion, and the plurality of convex bumps 341 contact the bottom wall of the second receiving groove 122 downward. The turntable 3 also includes a plurality of limit grooves 35 recessed downward from its top surface and a blocking portion 36 connecting the side walls of the limit grooves 35. The limit grooves 35 are connected to the first receiving groove 121 in vertical communication, and the blocking portion 36 is located above the connection between the limit grooves 35 and the first receiving groove 121. One of the blocking portions 36 faces in the opposite direction to the other blocking portion 36.

[0038] like Figure 1 and Figure 2 As shown, the light source assembly 4 is exposed upward from the turntable 3 and blocks the turntable 3 from shifting upward. The light source assembly 4 includes a lamp board 41 and a plurality of lamp beads 42 fixed to the lamp board 41. The lamp board 41 includes a clearance groove running through from top to bottom. When installing the lamp board 41, first match the positioning hole of the lamp board 41 with the positioning portion 124 for pre-positioning, so that the plurality of fixing holes on the lamp board 41 are aligned one by one with the plurality of fixing portions 125, and then fix the lamp board 41 to the fixing portion 125. One end of the conductive wire is electrically connected to the main board 200, and the other end passes through the clearance groove to electrically connect to the lamp board 41. The plurality of lamp beads 42 alternate colors.

[0039] like Figure 1As shown, the fixing frame 5 includes a main body 51, a plurality of extensions 52 extending downward from the main body 51, and a hook 53 connecting the extensions 52. The hook 53 is extended from the extension 52 along the outer contour direction of the main body 51, and there is a gap between the hook 53 and the main body 51 in the vertical direction. The hook 53 is located below the blocking portion 36 or the blocking portion 36 is accommodated in the gap between the hook 53 and the main body 51. In the embodiment, the hook 53 is an arc-shaped structure, and the center of the circle formed by its extension line is coaxial with the center of the main body 51 or the curvature of the hook 53 is the same as at least part of the curvature of the main body 51. When the fixing frame 5 is installed on the turntable 3, the hook 53 is first accommodated in the limiting groove 35, and then moves from the limiting groove 35 to below the blocking portion 36, and is exposed downward in the first receiving groove 121. In other embodiments, a plurality of the hooks 53 may also be installed on the base 1 , and the motor assembly 2 drives the base 1 to rotate.

[0040] like Figure 1 , Figure 7 and Figure 8As shown, the projection sheet 6 is installed in the installation hole 511, and the slide 7 is located above the projection sheet 6. The fixing frame 5, the projection sheet 6 and the slide 7 together constitute a projection component, or the projection sheet 6 is defined as a projection component, or the projection sheet 6 and the slide 7 are collectively defined as a projection component. When the projection component is defined as the projection sheet 6, the projection sheet 6 includes a plurality of hooks 53 installed on the base 1 or the turntable 3. The gear drives the turntable 3 or the base 1. The projection sheet 6 forms a fan-shaped structure in the unfolded state, and is installed in the installation hole 511 to form a hollow conical structure, and its taper is the same as the taper of the inner wall of the installation hole 511. The projection sheet 6 is installed upward in the installation hole 511, and the fit between the projection sheet 6 and the inner wall of the installation hole 511 is changed from a loose fit to a tight fit. The projection sheet 6 is attached to the inner wall of the installation hole 511 to prevent the projection sheet 6 from automatically falling off the fixing frame 5. The projection film 6 includes a transparent film, a main projection area arranged on the transparent film, and an auxiliary projection area arranged around the main projection area. The transparent film serves as the negative film of the projection film 6, and the main projection area includes a monochrome area and / or a multi-color area and / or a transparent area. The light emitted by the lamp beads 42 passes through the auxiliary projection area and the main projection area to form an alternately arranged projection pattern, and the projection brightness of the main projection area is higher than the projection brightness of the auxiliary projection area. The projection film 6 includes a first end 61 and a second end 62 that can be connected or detached, and an upper end surface 63 and a lower end surface 64 connecting the first end 61 and the second end 62. The first end 61 includes a base 611 and at least one base 612 extending from the base 611. The second end 62 includes a matching portion 621 and at least one locking portion 622 arranged away from the base 612 relative to the matching portion 621. In this embodiment, the two bases 612 are arranged at intervals in the up and down directions, and the two bases 612 are buckled with the two locking portions 622 in a one-to-one correspondence. The base 611 and the matching portion 621 are stacked up and down, the base 611 is located above the matching portion 621, and the overlapping area of ​​the base 611 and the matching portion 621 gradually decreases from bottom to top. The width of the base 612 is less than 1 / 2 of the width of the base 611, the locking portion 622 is configured as a snap groove penetrating the matching portion 621, the width of the snap groove is less than 1 / 2 of the width of the second end portion 62, the base 612 is inserted into the snap groove, and the base 612 protrudes into the inner side of the tapered projection film 6 or is exposed on the outer side of the projection film 6. The distances between the two snap grooves and the edge of the matching portion 621 are the same, or the distance between one of the snap grooves and the edge of the matching portion 621 is greater than the distance between the other snap groove and the edge of the matching portion 621.The first end 61 of the first end 61 and / or the second end face of the second end 62 are inclined toward the central axis P of the tapered slide 6. The contour surface of the upper end face 63 and / or the lower end face 64 is a curved surface. In this embodiment, the middle part of the upper end face 63 and / or the lower end face 64 is bent downward, and the two side parts of the upper end face 63 and / or the lower end face 64 are gradually bent upward from the middle, so that when the slide 6 is rolled into a tapered structure, the upper end face 63 and the lower end face 64 are approximately at the same height, which is convenient for adapting to the fixing frame 5. The slide 7 is installed on the fixing frame 5 and is located above the lamp bead 42. The slide 7 covers the upper opening 123 of the conical slide 6. When the light emitted by the lamp beads 42 is projected onto the inner surface of the slide 6, the slide 6 will reflect some stray light. Since the slide 6 forms a conical structure, the slide 6 projects the reflected stray light downward, reducing the stray light projected upward onto the slide 7, thereby reducing the influence of the stray light on the projection effect. In other embodiments, the projection assembly is fixed to the rotating shaft of the motor assembly 2.

[0041] like Figure 1 , Figure 2 as well as Figure 3 As shown, the housing 8 is covered on the outer side of the slide 6 and the slide 7. The housing 8 includes a base 81, a connecting portion 82 connected to the base 81, and a stopper 83. The stopper 83 is formed by extending from the connecting portion 82 along the outer contour direction of the housing 8, and a gap is formed between the stopper 83 and the base 81 in the up-down direction. The stopper 83 is located below the limiting portion 129 or the limiting portion 129 is accommodated between the stopper and the base 81 of the housing 8. The stopper 83 is exposed in the receiving cavity 13. In this embodiment, the stopper 83 is an arc-shaped structure, and the center of the circle formed by its extension line is coaxial with the center of the base 81. When the housing 8 is installed on the base 1, the stopper 83 is first accommodated in the slot 128, and then moves from the slot 128 to below the limiting portion 129, and is exposed downward in the receiving cavity 13.

[0042] like Figures 9 to 13As shown, it is a second embodiment of the projection device 100 of the utility model. The structure of the projection device 100 of this embodiment is substantially the same as that of the first embodiment, and the difference is that the second shell 12 of the base 1 includes a plurality of protrusions 130 and a plurality of elastic hooks extending upward and arranged at intervals. The plurality of protrusions 130 and the plurality of hooks are arranged around the opening 123. The hooks are away from the opening 123 relative to the protrusions 130. The lamp board 41 includes a plurality of buckle holes 43 passing through from top to bottom, and the plurality of hooks are elastically deformed and protrude into the buckle holes 43, and the hooks prevent the lamp board 41 from deflecting upward. The plurality of protrusions 130 are arranged around the shaft portion 32 of the turntable 3 or the shaft portion 32 is arranged around the plurality of protrusions 130. The plurality of protrusions 130 limit the radial limitation and / or axial limitation of the shaft portion 32.

[0043] In summary, the projection device of the utility model has the following beneficial effects:

[0044] (1) An opening 123 extending upward through the base 1 and at least one fixing portion 125 exposed upward from the opening 123; a light source assembly 4, comprising a lamp board 41 and at least one lamp bead 42 mounted on the lamp board 41, wherein the lamp board 41 is fixedly connected to the fixing portion 125; a projection component, which is covered above the lamp bead 42; the projection component comprises a transparent film, a main projection area and an auxiliary projection area formed on the transparent film, wherein the main projection area comprises a monochrome area and / or a multi-color area and / or a transparent area, and the light emitted by the lamp bead 42 passes through the auxiliary projection area and the main projection area to form an alternating projection pattern, wherein the projection brightness of the main projection area is higher than that of the auxiliary projection area, the molding process is simple, the cost is low, and the projection color is rich.

[0045] The above detailed description is only an explanation of the preferred embodiment of the utility model, and does not limit the patent scope of the utility model. Therefore, all equivalent technical changes made by using the description and illustrations of this creation are included in the patent scope of this creation.

Claims

1. A projection device, characterized in that: include: A base, comprising an opening extending upward and at least one fixing portion exposed upward from the opening; A light source assembly, comprising a lamp board and at least one lamp bead mounted on the lamp board, wherein the lamp board is fixedly connected to the fixing portion; A projection component is covered above the lamp beads; the projection component includes a transparent film, a main projection area and an auxiliary projection area formed on the transparent film, the main projection area includes a monochrome area and / or a multi-color area and / or a transparent area, the light emitted by the lamp beads passes through the auxiliary projection area and the main projection area to form an alternating projection pattern, and the projection brightness of the main projection area is higher than the projection brightness of the auxiliary projection area.

2. The projection device as claimed in claim 1, characterized in that: The projection device includes a turntable installed on the base, the base includes a limiting portion arranged around the opening, the limiting portion protrudes into the window of the turntable, the opening and the window are connected to each other up and down, the fixing portion is separated from the limiting portion or the limiting portion is fixedly connected to the fixing portion, the limiting portion constitutes a reinforcing rib of the fixing portion, and the light panel prevents the turntable from escaping from the first receiving groove of the base.

3. The projection device as claimed in claim 1, characterized in that: The projection device includes a turntable installed on the base, the base includes at least one positioning portion extending upward, the positioning portion is accommodated in the window of the turntable, the lamp board is pre-positioned and installed on the positioning portion, the fixing hole of the lamp board is aligned with the fixing portion up and down, the positioning portion is higher than the fixing portion, and the positioning portion passes through the positioning hole of the lamp board upward.

4. The projection device according to claim 3, characterized in that: The base includes a limiting portion arranged around the plurality of fixing portions, the turntable is arranged around the limiting portion, the positioning portion is fixedly connected to the fixing portion or the positioning portion is fixedly connected to the limiting portion, the fixing portion constitutes a reinforcing rib of the positioning portion, or the limiting portion constitutes a reinforcing rib of the positioning portion.

5. The projection device according to any one of claims 1 to 4, characterized in that: The projection device comprises a turntable mounted on the base, a fixing frame mounted on the turntable and the projection component mounted on the fixing frame, the projection component constitutes a hollow conical structure, and the taper of the conical projection component is the same as the taper of the inner wall of the mounting hole of the fixing frame.

6. The projection device according to any one of claims 1 to 4, characterized in that: The projection device includes a turntable installed on the base, the projection device includes a projection component covered above the lamp bead, the turntable includes a downwardly recessed limit groove and a blocking portion connected to the side wall of the limit groove, the limit groove is connected to the first receiving groove of the base in vertical communication, the projection component includes a main body, an extension portion connected to the main body, and a hook portion extending from the extension portion, the extension portion is received in the limit groove, the hook portion is located below the blocking portion, and the hook portion is downwardly exposed in the first receiving groove of the base.

7. The projection device as claimed in claim 6, characterized in that: The hook portion and the main body form a gap in the up and down directions, the blocking portion is accommodated in the gap, the curvature of the hook portion is the same as at least part of the curvature of the main body, or the center of the circle formed by the extension line of the hook portion is coaxial with the center of the main body.

8. The projection device according to any one of claims 1 to 4, characterized in that: The projection component includes a fixing frame and a projection film installed on the fixing frame, the fixing frame includes a mounting hole with a conical structure, the projection film is at least partially attached to the inner wall or outer wall of the mounting hole, and the projection film includes the transparent film, the main projection area and the auxiliary projection area arranged on the transparent film.

9. The projection device according to any one of claims 1 to 4, characterized in that: The base includes a first receiving groove formed by a downward recess and a second receiving groove arranged around the first receiving groove. The projection device includes a turntable received in the first receiving groove and the second receiving groove. There is a gap between the turntable and the first receiving groove in the up and down directions. The turntable and the bottom wall of the second receiving groove are in contact with each other in the up and down directions.

10. The projection device according to any one of claims 1 to 4, characterized in that: The projection component includes a plurality of hooks installed on the base, and the plurality of lamp beads change colors alternately; or the projection device includes a turntable installed on the base, the projection component includes a plurality of hooks installed on the turntable, and a motor assembly drives the turntable; or the projection component includes a plurality of hooks installed on the base, and a motor assembly drives the base to rotate; or the projection component is fixed on a rotating shaft of a motor assembly.

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