A projection lamp

Abstract

The utility model discloses a projection lamp, including base, circuit board is installed in base, detection device is installed in base, and detection device is connected with circuit board electricity, and detection device includes transmitting end and receiving end, first light source subassembly is fixed in base, and with circuit board electricity is connected, projection subassembly is located the top of first light source subassembly, and includes projection sheet, transmitting end emits signal to projection sheet, and signal is reflected to receiving end through projection sheet, and detection device is in low level state at this time, when the user replaces projection sheet, receiving end does not receive the signal that reflects back, and detection device is in high level state, and circuit board reduces the brightness of first light source subassembly or extinguishes first light source subassembly according to the signal of detection device at this time, the utility model discloses take initiative anti -dazzle mechanism, and this mechanism response speed is fast, and the instantaneous glare irritation that avoids high brightness light source direct irradiation human eye causes, protects user eye safety.

Description

[Technical Field]

[0001] This utility model relates to the field of projection lamp technology, and in particular to a projection lamp that prevents glare when replacing a projection sheet. [Background Technology]

[0002] An existing projection lamp includes a base, a lamp plate mounted on the base, a cover mounted on the base, a projection sheet fixed to the cover, and a lampshade covering the lamp plate; the base has a through hole running vertically through it, the lamp plate is fixed above the through hole, and the light emitted by the lamp plate passes through the projection sheet to form a projection light effect.

[0003] The aforementioned projector lamps typically use high-brightness LEDs to illuminate the projection sheet in order to achieve a clear projection effect. During the use of these projector lamps, when the user needs to replace the projection sheet, the projector lamp will continuously emit a high-brightness light source. If the user looks directly at this light source, the high-brightness light source will directly shine into the human eye, causing instantaneous glare and triggering a temporary visual blind spot or discomfort.

[0004] Therefore, a new projection lamp needs to be designed to solve the above problems. [Utility Model Content]

[0005] In view of the problems faced by the prior art, this utility model provides a projection lamp for adjusting the brightness of the light source when replacing the projection sheet.

[0006] To achieve the above objectives, the present invention employs the following technical means:

[0007] A base is provided, and a circuit board is mounted on the base. A detection device is also mounted on the base and electrically connected to the circuit board. The detection device includes a transmitter and a receiver. A first light source assembly is fixed to the base and electrically connected to the circuit board. A projection assembly is located above the first light source assembly and includes a projection sheet. The transmitter emits a signal toward the projection sheet, and the signal is reflected by the projection sheet to the receiver. At this time, the detection device is in a low-level state. When the user replaces the projection sheet, the receiver does not receive the reflected signal, and the detection device is in a high-level state. At this time, the circuit board reduces the brightness of the first light source assembly or turns off the first light source assembly according to the signal from the detection device.

[0008] Furthermore, the base includes a receiving cavity and an opening communicating vertically with the receiving cavity, the circuit board is located in the receiving cavity, the first light source assembly includes a lamp board and a through hole penetrating the lamp board, the through hole communicating vertically with the opening, the detection device is exposed upward through the through hole and is positioned towards the projection sheet.

[0009] Furthermore, the first light source assembly includes a plurality of LED beads and conductive wires, the LED beads being arranged around the through hole, and the conductive wires passing through the through hole and electrically connected to the lamp board.

[0010] Furthermore, the projection assembly further includes a cover, the cover including a first part and a second part covering the first part, the projection sheet including a first projection sheet mounted on the second part and a second projection sheet mounted on the first part, and when the detection device is exposed upward on the base, the transmitting end transmits a signal toward the first projection sheet or the transmitting end transmits a signal toward the second projection sheet.

[0011] Furthermore, the projection assembly further includes a cover, the cover including a first part extending in a vertical direction and a support part extending horizontally from the first part, the projection sheet including a first projection sheet adsorbed on the support part and a second projection sheet mounted on the first part, a magnetic element provided on the mating end face of the support part and the second projection sheet, a metal element provided on the mating end face of the second projection sheet and the support part, the magnetic element generating a magnetic force on the metal element, so that the cover and the second projection sheet are magnetically connected.

[0012] Furthermore, the cover also includes an opening penetrating the first part, and the magnetic or metal component is arranged around the opening.

[0013] Furthermore, the projection component further includes a cover, the cover including a first part and a second part covering the first part, the mating end face of the first part or the second part is provided with a protrusion, and when the first part and the second part are connected, the protrusion abuts against the mating end face of the first part or the second part.

[0014] Furthermore, the projection assembly further includes a cover, the cover including a first part and a second part covering the first part, the mating ends of the first part and the second part are provided with movable insertable locking pieces, the locking pieces abutting against the mating end faces of the first part and the second part when they are connected.

[0015] Furthermore, the first light source component dissipates heat through a heat sink plate attached to its bottom, or through heat dissipation holes provided in the base.

[0016] Compared with the prior art, the projection lamp of this utility model has the following beneficial effects:

[0017] By setting up a detection device, which includes a transmitter and a receiver, the transmitter emits a signal toward the projector, and the signal is reflected by the projector to the receiver. At this time, the detection device is in a low-level state. When the user replaces the projector, the receiver does not receive the reflected signal, and the detection device is in a high-level state. At this time, the circuit board reduces the brightness of the first light source component or turns off the first light source component according to the signal from the detection device. This utility model adopts an active anti-glare mechanism. The detection device monitors the position of the projector in real time. When the projector is in place, the detection device is in a low-level state. When the removal of the projector is detected, the detection device is in a high-level state, and the circuit board immediately triggers brightness adjustment or turns off the light source. The above-mentioned active anti-glare mechanism has a fast response speed, avoiding the instantaneous glare stimulation caused by high-brightness light sources directly shining on the eyes, and protecting the user's eye safety. Secondly, this utility model automatically adjusts the brightness only when necessary, which not only ensures full brightness output during normal use, but also avoids the tediousness of frequent manual adjustment, improving the user experience. [Attached Image Description]

[0018] Figure 1 This is an exploded perspective view of a projection lamp proposed in this utility model;

[0019] Figure 2 This is a top view of the present invention with the projection component and housing removed;

[0020] Figure 3 A 3D view of the base after the cover plate has been removed;

[0021] Figure 4 This is a three-dimensional exploded view of the cover.

[0022] Figure 5 This is another exploded view of the cover;

[0023] Explanation of reference numerals in the accompanying drawings for specific embodiments:

[0024] Circuit Board 13 Opening 14 Containment cavity 15 Detection device 2 Transmitter 21 Receiver 22 First light source assembly 3 31 LED beads Light panel 32 Conductive wire 33 Through hole 34 Projection Component 4 Cover 41 Part 1, Chapter 411 Part 2, Chapter 412 4111 opening Support part 4112 Magnetic component 4113 Metal parts 4114 4115 crimping part Buckle part 4116 Convex hull 413 slide 42 First slide 421 Second slide 422 Casing 5

Detailed Implementation Methods

[0025] To facilitate a better understanding of the purpose, structure, features, and effects of this utility model, the present utility model will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0026] First embodiment:

[0027] like Figures 1 to 4As shown, the projection lamp 100 of the first embodiment of the present invention includes a base 1, a detection device 2 installed on the base 1, a first light source assembly 3 installed on the base 1, a projection assembly 4 located above the first light source assembly 3, and a housing 5. The projection assembly 4 includes a cover 41 covering the first light source assembly 4 and a projection sheet 42 installed on the cover 41.

[0028] like Figures 1-3 As shown, the base 1 includes a chassis 11 and a cover plate 12 covering the chassis 11. The chassis 11 includes a receiving cavity 15 and heat dissipation holes for dissipating heat from the first light source assembly 3. The receiving cavity 15 is equipped with a circuit board 13, a motor, a speaker, and a battery. The cover plate 12 includes an opening 14 that communicates vertically with the receiving cavity 15.

[0029] like Figure 2 and Figure 3 As shown, the detection device 2 includes a transmitter 21 and a receiver 22. The detection device 2 is mounted on the base 1. One end of the detection device 2 is electrically connected to the circuit board 13, and the other end is positioned towards the projection screen 42. The transmitter 21 emits a signal towards the projection screen 42, and the signal is reflected by the projection screen 42 to the receiver 22. At this time, the detection device 2 is in a low-level state. When the user replaces the projection screen 42, the receiver 22 does not receive the reflected signal, and the detection device 2 is in a high-level state. At this time, the circuit board 13 reduces the brightness of the first light source component 3 or turns off the first light source component 3 according to the signal from the detection device 2. In this embodiment, the detection device 2 is an infrared photodiode detector, which includes an infrared transmitter and an infrared receiver. The infrared transmitter emits infrared light towards the projection screen 42, the projection screen 42 reflects the infrared light, and the infrared receiver receives the reflected infrared light and converts the light signal into an electrical signal, which is then transmitted to the circuit board 13. The circuit board 13 thereby reduces or turns off the brightness of the first light source component 3.

[0030] like Figures 1-3As shown, the first light source assembly 3 includes a lamp board 32, a plurality of lamp beads 31, a conductive wire 33, and a through hole 34 penetrating the lamp board 32. The first light source assembly 3 is fixed to the base 1 and electrically connected to the circuit board 13. The lamp board 32 is arranged around the through hole 34, the lamp beads 31 are disposed on the lamp board 32 and arranged around the through hole 34, one end of the conductive wire 33 passes through the through hole 34 and is electrically connected to the lamp board 32, and the other end is electrically connected to the circuit board 13. The through hole 34 and the opening 14 are located vertically. The detection device 2 is exposed upward through the through hole 34. In this embodiment, the detection device 2 is fixed inside the receiving cavity 15 or fixed to the opening 14. The signal emitted by the detection device 2 passes through the through hole 34 and is emitted towards the projection sheet 42, or is emitted from the upper surface of the through hole 34 towards the projection sheet 42. On the other hand, the power of a single lamp bead 31 of the first light source assembly 3 is 10W. When a single lamp bead 31 with a power greater than 10W is used, the first light source assembly 3 dissipates heat through a heat sink plate attached to its bottom.

[0031] like Figure 1 , Figure 4 and Figure 5 As shown, the cover 41 includes a first part 411 and a second part 412 covering the first part 411. The projection sheet 42 includes a first projection sheet 421 and a second projection sheet 422. The first projection sheet 421 is mounted on the second part 412, and the second projection sheet 422 is mounted on the first part 411. The bottom of the first part 411 is provided with a snap-fit ​​part 4116, and the base 1 is provided with a corresponding slot corresponding to the snap-fit ​​part 4116. The snap-fit ​​part 4116 is connected to the slot, so that the cover 41 will not detach from the base 1. The cover 41 covers the first light source assembly 3, so that the light from the first light source assembly 3 passes through the first projection sheet 421 and the second projection sheet 422 to form a projection light effect. When the detection device 2 is exposed upward on the base 1, the transmitting end 21 emits a signal toward the first projection sheet 421 or the transmitting end 21 emits a signal toward the second projection sheet 422. In this embodiment, when the detection device 2 is fixed to the receiving cavity 15 (e.g. Figure 2 and Figure 3 The transmitting end 21 emits a signal directly upward toward the first projection sheet 421; when the detection device 2 is located on the surface of the base 1 or slightly higher than the through hole 34, the signal emitted by the transmitting end 21 is emitted arbitrarily in all directions, that is, toward the first projection sheet 421 or toward the second projection sheet 422.

[0032] In another aspect of this embodiment, such as Figure 4As shown, the first part 411 extends vertically and includes a support part 4112 extending horizontally from the first part 411 and an opening 4111 penetrating the first part 411. The support part 4112 is provided with a magnetic element 4113 around the opening 14. The projection sheet 42 includes a first projection sheet 421 adsorbed on the support part 4112 and a second projection sheet 422 mounted on the first part 411. The first projection sheet 421 is provided with a metal element 4114 corresponding to the magnetic element 4113. The magnetic element 4113 or the metal element 4114 is arranged around the opening 4111. The magnetic element 4113 generates a magnetic force on the metal element 4114, so that the cover 41 is magnetically connected to the first projection sheet 421.

[0033] In another aspect of this embodiment, such as Figure 5 As shown, the first part 411 includes a crimping part 4115 that mates with the second part 412 and a plurality of protrusions 413 provided on the crimping part 4115. When the first part 411 and the second part 412 are connected, the protrusions 413 abut against the mating end face of the first part 411 or the second part 412, including the following two cases:

[0034] (1) The convex 413 is provided on the pressing part 4115 of the first part 411. When the first part 411 and the second part 412 are connected, the convex 413 abuts against the mating end face of the second part 412, wherein the mating end face is the contact surface of the second part 412 with the first part 411.

[0035] (2) The convex 413 is provided on the second part 412. When the first part 411 and the second part 412 are connected, the convex 413 abuts against the mating end face of the first part 411, wherein the mating end face is the pressing part 4115 of the first part 411.

[0036] In another aspect of this embodiment, when the first part 411 and the second part 412 covering the first part 411 are connected, the mating ends of the first part 411 and the second part 412 are provided with movable insertable locking pieces. The locking pieces abut against the mating end faces of the first part 411 and the second part 412 when they are connected. In this embodiment, when assembling the first part 411 and the second part 412, one end of the locking piece is attached to the top of the first part 411. When the second part 412 is covered, the locking piece is located in the gap between the first part 411 and the second part 412. After the second part 412 is completely covered, the three parts fit tightly together to form a fixed structure. The locking piece is a thin sheet (gasket) of film material. The tolerance is compensated by the elasticity or thickness of the sheet structure to fill the gap between the first part 411 and the second part 412 and prevent loosening or displacement.

[0037] The outer shell 5 is a flexible shell that covers the base 1 and protects the internal structure of the projection lamp.

[0038] In summary, the projector of this utility model has the following beneficial effects:

[0039] (1) By setting a detection device 2, the detection device 2 includes a transmitter 21 and a receiver 22. The transmitter 21 emits a signal toward the projection sheet 42, and the signal is reflected by the projection sheet 42 to the receiver 22. At this time, the detection device 2 is in a low-level state. When the user replaces the projection sheet 42, the receiver 22 does not receive the reflected signal, and the detection device 2 is in a high-level state. At this time, the circuit board 13 reduces the brightness of the first light source component 3 or turns off the first light source component 3 according to the signal of the detection device 2. This utility model adopts the main The active anti-glare mechanism uses a detection device 2 to monitor the position of the projection sheet 42 in real time. When the projection sheet 42 is in place, the detection device 2 is in a low-level state. When the detection device 2 detects that the projection sheet 42 has been removed, it is in a high-level state. The circuit board 13 immediately triggers brightness adjustment or turns off the light source. The above-mentioned active anti-glare mechanism has a fast response speed, avoiding the instantaneous glare stimulation caused by high-brightness light sources directly shining on the human eye, thus protecting the user's eye safety. Secondly, this utility model automatically adjusts the brightness only when necessary, ensuring full brightness output during normal use while avoiding the tediousness of frequent manual adjustment, thus improving the user experience.

[0040] (2) The base 1 includes a receiving cavity 15 and an opening 14 that communicates vertically with the receiving cavity 15. The circuit board 13 is located in the receiving cavity 15. The first light source assembly 3 includes a lamp plate 32 and a through hole 34 that penetrates the lamp plate 32. The through hole 34 communicates vertically with the opening 14. The detection device 2 is exposed upward through the through hole 34 and is positioned towards the projection sheet 42. The detection device 2 of this utility model shares the same through hole 34 with the first light source assembly 3. The existing through hole 34 is used as a signal transmission path, eliminating the need for additional openings 4111 or fixing devices, thus reducing structural complexity.

[0041] (3) By setting the first light source assembly 3 to include multiple lamp beads 31 and conductive wires 33, the lamp beads 31 are arranged around the through hole 34, and the conductive wires 33 pass through the through hole 34 and are electrically connected to the lamp board 32; the present invention forms a longitudinal channel for the conductive wires 33 by setting the holes through the top and bottom, ensuring that the conductive wires 33 are in an open space throughout, avoiding direct contact with the base 1, and completely avoiding the risk of the conductive wires 33 being pressed by the lamp board 32 during the installation of the first light source assembly 3, thus reducing the failure rate caused by installation.

[0042] (4) The projection assembly 4 is further provided with a cover 41, the cover 41 includes a first part 411 and a second part 412 covering the first part 411, the projection sheet 42 includes a first projection sheet 421 installed on the second part 412 and a second projection sheet 422 installed on the first part 411, when the detection device 2 is exposed upward on the base 1, the transmitting end 21 transmits a signal toward the first projection sheet 421 or the transmitting end 21 transmits a signal toward the second projection sheet 422; by exposing the detection device 2 upward on the base 1, the signal transmission direction (towards the first projection sheet 421 and / or the second projection sheet 422) can be flexibly selected, realizing all-round real-time monitoring of the status of multiple projection sheets 42.

[0043] (5) The projection assembly 4 further includes a cover 41, which includes a first part 411 extending in a vertical direction and a support part 4112 extending horizontally from the first part 411. The projection sheet 42 includes a first projection sheet 421 adsorbed on the support part 4112 and a second projection sheet 422 mounted on the first part 411. A magnetic element 4113 is provided on the mating end face of the support part 4112 and the second projection sheet 422, and a metal element 4114 is provided on the mating end face of the second projection sheet 422 and the support part 4112. The magnetic element 4113 generates a magnetic force on the metal element 4114, so that the cover 41 and the second projection sheet 422 are magnetically connected. This utility model connects the cover 41 and the first projection sheet 422 through the cover 41 and the first projection sheet 422. With the magnetic attraction of the first projection sheet 421, the user only needs to bring the metal part 4114 of the first projection sheet 421 close to the magnetic part 4113 of the cover 41 to achieve a one-click installation. It automatically attracts into place by magnetic force, without the need for traditional buckles or pressing, avoiding the risk of pinching fingers, and shortening the time of each disassembly and assembly, realizing the rapid installation and precise positioning of the projection sheet 42. Secondly, by setting the cover 41 to include an opening 4111 through the first part 411, the magnetic part 4113 or metal part 4114 is arranged around the opening 4111. The magnetic part 4113 and metal part 4114 arranged around the opening 4111 in this utility model make the attraction force evenly distributed, preventing the projection sheet 42 from warping or shifting due to uneven magnetic force on one side, and ensuring that the projected image is not distorted.

[0044] (6) The projection component 4 is further provided with a cover 41, the cover 41 including a first part 411 and a second part 412 covering the first part 411. The mating end face of the first part 411 or the second part 412 is provided with a protrusion 413. When the first part 411 and the second part 412 are connected, the protrusion 413 abuts against the mating end face of the first part 411 or the second part 412. The present invention provides a protrusion 413 on the mating end of the first part 411 or the second part 412 of the cover 41. When connected, the protrusion 413 provides a force to the first part 411 or the second part 412, making the connection between the first part 411 and the second part 412 of the cover 41 more stable and improving the stability of the cover 41.

[0045] (7) The projection component 4 is further provided with a cover 41, the cover 41 including a first part 411 and a second part 412 covering the first part 411. The mating ends of the first part 411 and the second part 412 are provided with movable insertable locking pieces. When the first part 411 and the second part 412 are connected, the locking pieces abut against the mating end faces of the two. In this utility model, the locking pieces are movablely inserted and removed on the mating ends of the first part 411 or the second part 412 of the cover 41. When connected, the locking pieces provide force to the first part 411 or the second part 412, making the connection between the first part 411 and the second part 412 of the cover 41 more stable and improving the stability of the cover 41.

[0046] (8) Heat dissipation is achieved by setting a heat sink plate attached to the bottom of the first light source component 3, or by heat dissipation holes provided in the base 1. This utility model provides two heat dissipation methods for the light source component with a single power lamp bead 31 exceeding 10W. One is that the high temperature generated by the light source is directly conducted and diffused through the bottom heat sink plate to avoid heat accumulation. The other is that the heat dissipation holes on the side wall of the base 1 enhance air circulation and quickly exhaust hot air. Neither of the above two heat dissipation methods requires additional structure, saving space and meeting the requirements of product miniaturization.

[0047] The above detailed description is only a description of the preferred embodiment of this utility model and is not intended to limit the patent scope of this utility model. Therefore, all equivalent technical changes made using the content of this invention's specification and illustrations are included within the patent scope of this invention.

Claims

1. A projection lamp, characterized in that, include: The base, and the circuit board are mounted on the base; A detection device is mounted on the base and is electrically connected to the circuit board. The detection device includes a transmitter and a receiver. The first light source assembly is fixed to the base and electrically connected to the circuit board; A projection component is located above the first light source component and includes a projection sheet; The transmitting end emits a signal toward the projection screen, and the signal is reflected by the projection screen to the receiving end. At this time, the detection device is in a low-level state. When the user replaces the projection screen, the receiving end does not receive the reflected signal, and the detection device is in a high-level state. At this time, the circuit board reduces the brightness of the first light source component or turns off the first light source component according to the signal from the detection device.

2. A projection lamp as described in claim 1, characterized in that: The base includes a receiving cavity and an opening communicating vertically with the receiving cavity. The circuit board is located in the receiving cavity. The first light source assembly includes a lamp board and a through hole penetrating the lamp board. The through hole communicates vertically with the opening. The detection device is exposed upward through the through hole and is positioned towards the projection sheet.

3. A projection lamp as described in claim 2, characterized in that: The first light source assembly includes multiple LED beads and conductive wires. The LED beads are arranged around the through hole, and the conductive wires pass through the through hole and are electrically connected to the lamp board.

4. A projection lamp as described in claim 1, characterized in that: The projection assembly further includes a cover, the cover including a first part and a second part covering the first part, the projection sheet including a first projection sheet mounted on the second part and a second projection sheet mounted on the first part, and when the detection device is exposed upward on the base, the transmitting end transmits a signal toward the first projection sheet or the transmitting end transmits a signal toward the second projection sheet.

5. A projection lamp as described in any one of claims 1-3, characterized in that: The projection assembly further includes a cover, the cover including a first part extending in a vertical direction, an opening penetrating the first part, and a support part extending from the first part in a horizontal direction. The projection sheet includes a first projection sheet adsorbed on the support part and a second projection sheet mounted on the first part. A magnetic element is provided on the mating end face of the support part and the first projection sheet, and a metal element is provided on the mating end face of the first projection sheet and the support part. The magnetic element or the metal element is arranged around the opening, and the magnetic element generates a magnetic force on the metal element, so that the cover and the first projection sheet are magnetically connected.

6. A projection lamp as described in any one of claims 1-3, characterized in that: The projection component further includes a cover, which includes a first part and a second part covering the first part. The mating end face of the first part or the second part is provided with a protrusion. When the first part and the second part are connected, the protrusion abuts against the mating end face of the first part or the second part.

7. A projection lamp as described in any one of claims 1-3, characterized in that: The projection assembly further includes a cover, which includes a first part and a second part covering the first part. The mating ends of the first part and the second part are provided with movable insertable locking pieces, which abut against the mating end faces of the first part and the second part when they are connected.

8. A projection lamp as described in any one of claims 1-4, characterized in that: The first light source component dissipates heat through a heat sink plate attached to its bottom, or through heat dissipation holes provided in the base.

Images