A projection lamp

Abstract

This application discloses a projection lamp, including a housing, a light source, and a lens assembly. The housing has a light inlet and a light outlet on its front and back sides, respectively. An optical path channel is provided inside the housing. The light source is installed at the light inlet, and a light-transmitting plate is provided inside the light outlet. The lens assembly includes at least two upper lenses, one central lens, and at least one lower lens. The upper, central, and lower lenses are sequentially installed in the optical path channel from back to front. All three lenses are elliptical. This invention reduces the thickness of each lens by using elliptical lenses instead of the circular lenses used in the prior art, thereby effectively reducing the size of the projection lamp.

Description

Technical Field

[0001] This utility model relates to the field of projection technology, specifically to a projection lamp. Background Technology

[0002] LCD screen projection lamp equipment typically uses LED beads to emit light, which is then projected onto a digital screen through a lens to achieve projection display. It can project a clear image at a distance of 0.1m-0.5m. Customized display screens and backlight colors can also be developed according to customer needs, and it is used in digital display applications for household appliances such as dishwashers.

[0003] However, the existing projection lamps on the market mainly consist of a housing, a light source, a lens assembly, and a heat sink. The front of the housing is elliptical, the lens assembly consists of four circular lenses inside the housing, and the heat sink uses a multi-protrusion structure, resulting in the large size of the existing projection lamps. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a projection lamp that reduces the thickness of each lens by using an elliptical lens instead of a circular lens in the prior art, thereby reducing the size of the projection lamp.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a projection lamp, including a housing, a light source and a lens assembly. The front and back of the housing are respectively provided with a light inlet hole and a light outlet hole. The housing is provided with a light path channel located between the light inlet hole and the light outlet hole. The light source is installed at the light inlet hole, and a light-transmitting sheet is provided on the inner side of the light outlet hole.

[0006] The lens assembly includes at least two upper lenses, one central lens, and at least one lower lens. The at least two upper lenses, one central lens, and at least one lower lens are installed sequentially from back to front in the optical path channel, and the upper lenses, central lens, and lower lens are all elliptical lenses.

[0007] Preferably, both the upper and lower ends of the upper and lower lenses are provided with horizontal cut surfaces.

[0008] Preferably, the front of the housing has a planar structure.

[0009] Preferably, the back of the housing is also provided with a heat sink for heat dissipation of the light source, and the heat sink has a cuboid structure.

[0010] Preferably, the radiator includes heat sinks and a cover, the cover is fixedly installed on the back of the housing, the heat sinks are disposed inside the cover, and the cover is provided with heat dissipation holes.

[0011] Preferably, the housing includes an upper cover and a lower cover, with the upper cover detachably mounted on the lower cover;

[0012] The lower cover has a base, on which there are upper mounting slots, center mounting slots and lower mounting slots corresponding to the positions of the upper lens, center lens and lower lens, respectively. A partition is provided near the center mounting slot, and a first light-transmitting hole corresponding to the position of the center lens is opened on the partition.

[0013] Preferably, the projection lamp further includes a circuit board assembly, which includes a circuit board and a light source mounting plate, with the light source mounting plate mounted vertically downward at the rear end of the circuit board;

[0014] The circuit board is mounted on the base and located below the upper cover. The light source mounting plate is fixedly connected to the back of the lower cover and covers the light inlet hole. The light source is mounted on the light source mounting plate and located inside the light inlet hole.

[0015] The circuit board is also provided with a downward vertical plate. The base has a vertical plate mounting groove on the side of the partition away from the central mounting groove. A second light-transmitting hole corresponding to the position of the first light-transmitting hole is opened on the vertical plate.

[0016] Preferably, the side of the circuit board is also provided with a vertically downward positioning plate, and the base is provided with a positioning groove corresponding to the position of the positioning plate, and the positioning plate is inserted into the positioning groove.

[0017] Preferably, one side of the lower cover has an outwardly extending horizontal flange, and the flange and the lower cover are an integral structure.

[0018] Preferably, the base and the lower cover are an integral structure.

[0019] As can be seen from the above technical solution, compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a projection lamp that reduces the thickness of each lens by using an elliptical lens instead of the circular lens in the prior art, thereby effectively reducing the size of the projection lamp; furthermore, while ensuring the lens function, the elliptical lenses used for the upper and lower lenses are chamfered at the top and bottom, thereby further reducing the lens size and thus reducing the size of the projection lamp; furthermore, the use of a shell with a planar front structure and a cuboid heat sink can further reduce the size of the projection lamp; in addition, the circuit board covers the base from above, and the light source mounting plate covers the light source, which can easily achieve a light-blocking effect, thereby achieving a better projection experience.

[0020] In addition, other advantages of this invention will be set forth in the description which follows, in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a projection lamp according to the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the lower cover in this utility model;

[0024] Figure 3 This is a schematic diagram of the upper lens structure in this utility model;

[0025] Figure 4 This is a schematic diagram of the circuit board assembly in this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the pressure cap in this utility model;

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Housing; 10. Light inlet; 11. Light outlet; 12. Optical path channel; 13. Transmitting plate; 14. Top cover; 15. Bottom cover; 151. Base; 152. Upper mounting slot; 153. Central mounting slot; 154. Lower mounting slot; 155. Partition plate; 156. First light-transmitting hole; 157. Vertical plate mounting slot; 158. Positioning slot; 16. Flanged edge; 2. Light source; 3. Lens assembly; 31. Upper lens; 32. Central lens; 33. Lower lens; 34. Horizontal section; 4. Heat sink; 41. Heat sink fin; 42. Pressure cover; 43. Heat dissipation hole; 5. Circuit board assembly; 51. Circuit board; 52. Light source mounting plate; 53. Vertical plate; 54. Second light-transmitting hole; 55. Positioning plate. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] Reference Figure 1-5 This invention describes a projection lamp according to an embodiment of the present invention, which can be applied to the digital display field of household appliances.

[0032] In one embodiment, such as Figure 1-5 As shown, a projection lamp includes a housing 1, a light source 2, and a lens assembly 3. The front and back of the housing 1 are respectively provided with a light inlet 10 and a light outlet 11. The housing 1 has an optical path channel 12 located between the light inlet 10 and the light outlet 11. The light source 2 is installed at the light inlet 10, and a light-transmitting sheet 13 is provided on the inner side of the light outlet 11.

[0033] The lens assembly 3 includes at least two upper lenses 31, one central lens 32 and at least one lower lens 33. The at least two upper lenses 31, one central lens 32 and at least one lower lens 33 are installed sequentially from back to front in the optical path channel 12, and the upper lens 31, the central lens 32 and the lower lens 33 are all elliptical lenses.

[0034] The light-emitting aperture 11 can be circular, rectangular, or elliptical to meet different projection requirements. The specific structure is existing technology and will not be described in detail in this embodiment. As one implementation method, the upper lens 31 can be a lens with dimensions of 13.0mm × 9.5mm × 5.6mm and a back focal length of 5.1mm; the central lens 32 can be a lens with dimensions of 9.55mm × 2.67mm and a back focal length of 11.9mm; and the lower lens 33 can be a lens with dimensions of 12.28mm × 9.5mm × 3.34mm and a back focal length of 17.3mm. The size of the light-emitting aperture 11 can be 7mm × 3mm.

[0035] The projection lamp provided in the above embodiment reduces the thickness of each lens by using an elliptical lens instead of a circular lens in the prior art, thereby effectively reducing the size of the projection lamp; moreover, since the elliptical lens can effectively converge the light emitted by the light source, the projection clarity is guaranteed; in addition, the light source 2 is installed at the light inlet 10, and a light-transmitting sheet 13 is provided on the inner side of the light outlet 11, which can prevent dust or debris from entering the housing 1.

[0036] In this embodiment, both the upper lens 31 and the lower lens 33 are provided with horizontal cut surfaces 34 at their upper and lower ends. While ensuring the function of the lens, by providing horizontal cut surfaces 34 at the upper and lower ends of the upper lens 31 and the lower lens 33, the size of the lens is further reduced, thereby reducing the size of the projection lamp.

[0037] In this embodiment, the front of the housing 1 is a flat structure, which can further reduce the size of the entire projection lamp.

[0038] In this embodiment, the back of the housing 1 is also provided with a heat sink 4 for heat dissipation of the light source 2. The heat sink 4 has a cuboid structure. The setting of the heat sink 4 can effectively improve the heat dissipation efficiency of the light source 2, reduce the operating temperature of the light source 2, effectively prevent the light source 2 from being damaged due to overheating, improve the service life of the light source 2, and also ensure that the light source 2 is always maintained within the optimal operating temperature, thereby improving the luminous efficiency of the light source 2. In addition, setting the heat sink 4 to a cuboid structure can further reduce the size of the entire projection lamp.

[0039] In this embodiment, the heat sink 4 includes a heat sink 41 and a cover 42. The cover 42 is fixedly installed on the back of the housing 1, and the heat sink 41 is disposed inside the cover 42. The cover 42 is provided with heat dissipation holes 43. Specifically, since the heat sink 41 is disposed inside the cover 42 and the cover 42 is fixedly installed on the housing 1, when the cover 42 is installed on the housing 1, it can ensure that the heat sink 41 is in contact with the light source 2, thereby improving the heat dissipation efficiency. In addition, the heat dissipation holes 43 provided on the cover 42 can quickly dissipate heat into the surrounding air, thereby improving the heat dissipation efficiency of the light source 2 and further improving the service life of the entire projection lamp. In this embodiment, the cover 42 is installed on the housing 1 by bolts.

[0040] In this embodiment, the housing 1 includes an upper cover 14 and a lower cover 15, with the upper cover 14 detachably mounted on the lower cover 15. Because the upper cover 14 is detachably mounted on the lower cover 15, the upper cover 14 and the lower cover 15 can be quickly separated, facilitating overall inspection and maintenance. Specifically, in this embodiment, the upper cover 14 and the lower cover 15 can be installed using screws, clips, or a slider and guide rail structure. The specific installation structure is existing technology and will not be described in detail in this embodiment.

[0041] The lower cover 15 contains a base 151. The base 151 has an upper mounting groove 152, a central mounting groove 153, and a lower mounting groove 154, corresponding to the positions of the upper lens 31, the central lens 32, and the lower lens 33, respectively. A partition 155 is provided near the central mounting groove 153, and a first light-transmitting hole 156 corresponding to the position of the central lens 32 is provided on the partition 155. In specific implementation, the upper mounting groove 152, the central mounting groove 153, and the lower mounting groove 154 can allow the upper lens 31, the central lens 32, and the lower lens 33 to be installed independently on the base 151, improving the installation efficiency of the entire lens assembly 3. Furthermore, the partition 155 enhances the overall deformation resistance of the base 151, and the first light-transmitting hole 156 allows light to pass through.

[0042] In this embodiment, the projection lamp also includes a circuit board assembly 5, which includes a circuit board 51 and a light source mounting plate 52. The light source mounting plate 52 is vertically mounted downwards on the rear end of the circuit board 51, effectively reducing the lateral space occupied and improving the overall structural stability. The circuit board 51 covers the base 151 and is located below the upper cover 14. The light source mounting plate 52 is fixedly connected to the back of the lower cover 15 and covers the light inlet hole 10. The light source 2 is mounted on the light source mounting plate 52 and is located inside the light inlet hole 10. In specific implementation, by covering the base 151 from above with the circuit board 51 and covering the light source 2 with the light source mounting plate 52, a light-blocking effect can be easily achieved, thereby achieving a better projection experience. In addition, the light source 2 can be configured with different light source structures according to different projection requirements, preferably LED lamp beads.

[0043] The circuit board 51 is also provided with a downward-facing vertical plate 53. The base 151 has a vertical plate mounting groove 157 on the side of the partition 155 away from the central mounting groove 153. The vertical plate 53 has a second light-transmitting hole 54 corresponding to the position of the first light-transmitting hole 156. The vertical plate 53 and the vertical plate mounting groove 157 ensure the stability of the circuit board 51 during installation, and the second light-transmitting hole 54 ensures the passage of light. The side of the circuit board 51 is also provided with a vertically downward-facing positioning plate 55. The base 151 has a positioning groove 158 corresponding to the position of the positioning plate 55. The positioning plate 55 is inserted into the positioning groove 158. Through the cooperation of the positioning plate 55 and the positioning groove 158, the circuit board 51 can be better positioned and fixed, preventing it from shifting.

[0044] In this embodiment, a flange 16 extending horizontally outward is provided on one side of the lower cover 15. By providing the flange 16, the width of the entire housing 1 can be increased, thereby improving the stability and deformation resistance of the housing 1. The flange 16 can also be held by the user to move the projection lamp. In addition, the flange 16 and the lower cover 15 are an integral structure, which is simple and stable.

[0045] In this embodiment, the base 151 and the lower cover 15 are an integral structure, which simplifies the projection lamp structure and helps to reduce costs.

[0046] Other configurations and operations of the projection lamp according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] In the description of this specification, references to the terms "embodiment," "specific embodiment," "example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example that is included in at least one embodiment or example of the present invention.

[0049] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined with each other in any suitable manner in one or more embodiments or examples without interference or contradiction.

[0050] Materials or features may be combined with each other in any suitable manner in any one or more embodiments or examples without interference or contradiction.

Claims

1. A projection lamp, comprising a housing, a light source, and a lens assembly, characterized in that: The front and back of the housing are respectively provided with a light inlet and a light outlet. The housing is provided with an optical path channel between the light inlet and the light outlet. The light source is installed at the light inlet. A light-transmitting sheet is provided on the inner side of the light outlet. The lens assembly includes at least two upper lenses, one central lens, and at least one lower lens. The at least two upper lenses, the one central lens, and the at least one lower lens are installed sequentially from back to front in the optical path channel, and the upper lenses, the central lens, and the lower lens are all elliptical lenses.

2. A projection lamp according to claim 1, characterized in that: Both the upper and lower lenses have horizontal cut surfaces at their top and bottom ends.

3. A projection lamp according to claim 2, characterized in that: The front of the shell is a planar structure.

4. A projection lamp according to claim 3, characterized in that: The back of the housing is also provided with a heat sink for dissipating heat from the light source, and the heat sink has a cuboid structure.

5. A projection lamp according to claim 4, characterized in that: The radiator includes heat sinks and a cover. The cover is fixedly installed on the back of the housing. The heat sinks are disposed inside the cover. The cover has heat dissipation holes.

6. A projection lamp according to any one of claims 1 to 5, characterized in that: The housing includes an upper cover and a lower cover, wherein the upper cover is detachably mounted on the lower cover; The lower cover is provided with a base, and the base is provided with an upper mounting groove, a central mounting groove and a lower mounting groove respectively corresponding to the positions of the upper lens, the central lens and the lower lens. A partition is provided near the central mounting groove, and a first light-transmitting hole corresponding to the position of the central lens is opened on the partition.

7. A projection lamp according to claim 6, characterized in that: The projection lamp also includes a circuit board assembly, which includes a circuit board and a light source mounting plate, with the light source mounting plate mounted vertically downward at the rear end of the circuit board; The circuit board is mounted on the base and located below the upper cover; the light source mounting plate is fixedly connected to the back of the lower cover and covers the light inlet hole; the light source is mounted on the light source mounting plate and located inside the light inlet hole. The circuit board is also provided with a downward vertical plate, and the base is provided with a vertical plate mounting groove on the side of the partition away from the central mounting groove. A second light-transmitting hole is opened on the vertical plate, which corresponds to the position of the first light-transmitting hole.

8. A projection lamp according to claim 7, characterized in that: The circuit board is also provided with a vertically downward positioning plate on its side, and the base is provided with a positioning groove corresponding to the position of the positioning plate, and the positioning plate is inserted into the positioning groove.

9. A projection lamp according to claim 6, characterized in that: The lower cover has an outwardly extending horizontal flange on one side, and the flange and the lower cover are an integral structure.

10. A projection lamp according to claim 6, characterized in that: The base and the lower cover are an integral structure.

Images