Non-direct-emission lamp with high light emitting rate

Abstract

The invention discloses a non-direct light lamp with high light extraction rate, which comprises an inner cup, an outer cup, a light guide plate, a first light guide plate and a second light guide plate, the radiator is hinged to the inner cup, the radiator can swing and rotate relative to the inner cup, and a second light intercepting opening is formed in the radiator; the lamp arm is arranged on the radiator, and a light source is arranged at the bottom of the lamp arm; the reflection cup is arranged in the radiator, and the reflection cup is located below the light source; when the radiator does not swing relative to the inner cup, the vertical projection of the second light cutting opening is located in the vertical projection of the first light cutting opening; and when the radiator swings to a stroke end point relative to the inner cup, the vertical projection of the second light cutting opening is located in the vertical projection of the first light cutting opening. And the light emitting rate is better.

Description

Technical Field

[0001] The invention relates to a lamp, in particular to a non-direct lamp with high light output rate. Background Art

[0002] Indirect lighting refers to a light source that emits light that first goes toward the reflector cup, is reflected by the reflector cup, and then goes outward, making the output light of the lamp more uniform and less dazzling, with a good anti-glare effect.

[0003] Take spotlights as an example. Spotlights are installed on the ceiling to illuminate a local location. Depending on the requirements of the illuminated location, the spotlight can be set to a swingable structure. Therefore, the spotlight generally includes an inner cup and a radiator, wherein the inner cup is fixed on the ceiling, and the radiator can swing relative to the inner cup. In the spotlight structure of the prior art, when the radiator swings a certain angle relative to the inner cup, the cutoff port on the radiator is located outside the cutoff port of the inner cup, and the light is emitted through the cutoff port on the radiator and then emitted through the cutoff port on the inner cup. This causes part of the light coming out of the cutoff port of the radiator to be blocked by the inner cup after the radiator swings relative to the inner cup, resulting in the inability of this part of the light to be emitted to form an effective light spot, reducing the light output rate of the spotlight and affecting the use effect of the spotlight.

[0004] Therefore, it is necessary to improve and optimize the existing non-direct lighting fixtures. Summary of the invention

[0005] The present invention aims to solve at least one of the problems in the prior art. To this end, the present invention provides a non-direct lighting fixture with high light output efficiency, which has a better light output efficiency.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] A non-direct lighting fixture with high light output, comprising:

[0008] An inner cup, wherein the inner cup has a first cut-off opening;

[0009] A heat sink is hinged to the inner cup, the heat sink can swing relative to the inner cup, and the heat sink has a second cut-off opening;

[0010] A lamp arm is arranged on the radiator, and a light source is arranged at the bottom of the lamp arm;

[0011] A reflective cup, arranged in the radiator, and located below the light source;

[0012] When the heat sink does not swing relative to the inner cup, the vertical projection of the second light-cutting opening is located within the vertical projection of the first light-cutting opening;

[0013] When the heat sink swings to an end of a stroke relative to the inner cup, a vertical projection of the second light-cutting opening is located within a vertical projection of the first light-cutting opening.

[0014] Optionally, when the inner cup swings to an end of a stroke relative to the heat sink, a portion of the second light-cutting opening is located within the first light-cutting opening.

[0015] Optionally, a light exit hole is provided on the heat sink, the opening of the light exit hole forms the second light cut-off opening, and the hole wall of the light exit hole is an inclined wall that is larger at the top and smaller at the bottom.

[0016] Optionally, the inner cup has a light-through hole, the lower opening of the light-through hole forms the first light-cutting opening, the hole wall of the light-through hole is an inclined wall that is larger at the top and smaller at the bottom, and the first light-cutting opening is an inclined opening that gradually becomes higher along the swinging direction of the radiator.

[0017] Optionally, a plurality of teeth and grooves are provided at the bottom of the inner cup, and an ejector pin is provided in the radiator, wherein the upper end of the ejector pin is adapted to the teeth and grooves, and the lower end is connected to a spring.

[0018] Optionally, the inner cup is connected to an outer cup, and the outer cup is rotatably connected relative to the inner cup.

[0019] Optionally, the light source is arranged below the cup opening of the reflective cup; or, the light source is arranged flush with the cup opening of the reflective cup.

[0020] Optionally, a dustproof plate is provided in the radiator, and the dustproof plate is located above the lamp arm.

[0021] Optionally, the lamp is a spotlight.

[0022] The present invention has at least one of the following beneficial effects: the embodiment of the present invention fully considers that the radiator has two states relative to the inner cup, namely, non-swinging and swinging. When the radiator is not swinging relative to the inner cup, the vertical projection of the second light-cutting port is located within the vertical projection of the first light-cutting port; when the radiator swings to the end of the stroke relative to the inner cup, the vertical projection of the second light-cutting port is located within the vertical projection of the first light-cutting port, so that when the radiator is in two extreme positions relative to the inner cup, the vertical projection of the second light-cutting port is always located within the vertical projection of the first light-cutting port. Therefore, after the light emitted by the light source is reflected by the reflective cup, it first passes through the second light-cutting port of the radiator and then enters the first light-cutting port of the inner cup, thereby reducing or avoiding the light-cutting effect of the first light-cutting port of the inner cup on the light, so that more light can be emitted, thereby improving the light output rate of the non-direct lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the three-dimensional structure of a lamp in an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 Schematic diagram from another angle;

[0025] Figure 3 yes Figure 1 A schematic cross-sectional view of the structure shown;

[0026] Figure 4 yes Figure 3 Orthographic projection diagram of ;

[0027] Figure 5 yes Figure 1 A schematic cross-sectional view of the structure at another angle;

[0028] Figure 6 yes Figure 5 Orthographic projection diagram of ;

[0029] Figure 7 is a schematic diagram of the three-dimensional structure of the heat sink after it is swung relative to the inner cup in the embodiment of the present invention;

[0030] Figure 8 yes Figure 7 A schematic cross-sectional view of the structure shown;

[0031] Fig. 9 yes Figure 7 Schematic diagram of the orthographic projection of the structure shown (the second cut-off light port is represented by a dotted line for a clearer expression);

[0032] Figure 10-12 is a schematic diagram of the three-dimensional structure of a radiator in an embodiment of the present invention;

[0033] Figure 13-14 Schematic diagram of the three-dimensional structure of the inner cup in the embodiment of the present invention.

[0034] Description of Figure Numbers:

[0035] 1-inner cup, 11-first light-cutting port, 12-tooth groove, 13-light-through hole, 2-heat sink, 21-second light-cutting port, 22-light-exiting hole, 23-inclined wall, 3-lamp arm, 4-light source, 5-reflector cup, 6-dust-proof plate, 7-thimble, 8-spring, 9-outer cup, 10-circlip. DETAILED DESCRIPTION

[0036] To make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments described below can be combined with each other arbitrarily without conflict.

[0037] Many different implementations or examples are provided below for implementing the structure of the present invention.

[0038] See also Figure 1-Figure 14 , a non-direct luminaire with high light output rate according to an embodiment of the present invention, in this embodiment, the luminaire is a spotlight, including an inner cup 1, the inner cup 1 having a first light cut-off opening 11, see Figure 4 As shown, the middle of the inner cup 1 is a light-through hole 13, and the first light-cutting opening 11 described in this embodiment is the lower opening of the light-through hole 13; the radiator 2 is generally made of aluminum to improve the heat dissipation efficiency. The radiator 2 is hinged to the inner cup 1, and the radiator 2 can swing relative to the inner cup 1. The radiator 2 has a second light-cutting opening 21, and the middle of the radiator has a light-emitting hole 22. The second light-cutting opening 21 described in this embodiment is the upper opening of the light-emitting hole 22; the lamp arm 3 is arranged on the radiator 2. In this embodiment, the lamp arm 3 and the radiator 2 are integrally formed, and a light source 4 is arranged at the bottom of the lamp arm 3; the reflective cup 5 is arranged in the radiator 2, and the reflective cup 5 is located below the light source 4. The light emitted by the light source 4 shines on the reflective cup 5, and is reflected by the reflective cup 5 and then emitted through the second light-cutting opening 21 and the first light-cutting opening 11. When the radiator 2 is not swung relative to the inner cup 1, the vertical projection of the second light-cutting opening 21 is located within the vertical projection of the first light-cutting opening 11; when the radiator 2 is swung relative to the inner cup 1 to the end of the stroke, the vertical projection of the second light-cutting opening 21 is located within the vertical projection of the first light-cutting opening 11. The embodiment of the present invention fully considers that the radiator 2 has two states of non-swinging and swinging relative to the inner cup 1, so that when the radiator 2 is at two extreme positions relative to the inner cup 1, the vertical projection of the second light-cutting opening 21 is always located within the vertical projection of the first light-cutting opening 11. Therefore, after the light emitted by the light source 4 is reflected by the reflective cup 5, it first passes through the second light-cutting opening 21 of the radiator 2 and then enters the first light-cutting opening 11 of the inner cup 1, reducing or avoiding the light-cutting effect of the first light-cutting opening of the inner cup 1 on the light, so that more light can be emitted, thereby improving the light output rate of the non-direct lighting fixture.

[0039] See Figure 8 As shown, in some embodiments of the present invention, when the inner cup 1 swings to the end of the stroke relative to the heat sink 2, part of the second light-cutting opening 21 is located in the first light-cutting opening 11. Thus, the light leakage loss between the first light-cutting opening 11 and the second light-cutting opening 21 can be reduced, so that more light from the second light-cutting opening 21 can enter the first light-cutting opening 11.

[0040] See Figure 6As shown, in some embodiments of the present invention, the heat sink 2 is provided with a light exit hole 22, the opening of the light exit hole 22 forms the second light cut-off opening 21, and the hole wall of the light exit hole 22 is an inclined wall 23 that is larger at the top and smaller at the bottom. This structure allows the light reflected by the reflective cup to be reflected at a larger angle after hitting the inclined wall 23, so that more light can enter the first light cut-off opening 11 and be emitted, further improving the light extraction rate.

[0041] See Figure 6 and Figure 8 As shown, in some embodiments of the present invention, the inner cup 1 has a light-through hole 13, the lower hole of the light-through hole 13 forms the first light-cutting hole 11, the hole wall of the light-through hole 13 is an inclined wall with a larger top and a smaller bottom, the first light-cutting hole 11 is an inclined hole, and the inclined hole 11 gradually increases along the swing direction of the heat sink 2. Since the hole wall of the light-through hole 13 is an inclined wall, the first light-cutting hole 11 is set as an inclined hole that gradually increases along the swing direction of the heat sink 2, so that Figure 8 The rightmost point A of the oblique opening shown is further to the right than the rightmost point B of the straight opening to adapt to the rightward movement of the second cut-off opening 21 after the radiator 2 is swung, thereby ensuring that Figure 8 In the state shown, the vertical projection of the second light-cutting opening 21 is always within the vertical projection of the first light-cutting opening 11 , so as to reduce the light cutoff by the first light-cutting opening 11 and improve the light extraction efficiency.

[0042] See Figure 3 as well as Fig.13 As shown, in some embodiments of the present invention, a plurality of tooth grooves 12 are provided at the bottom of the inner cup 1, and an ejector pin 7 is provided in the heat sink 2, the upper end of the ejector pin 7 is adapted to the tooth groove 12, and the lower end is connected to a spring 8. When the heat sink 2 swings relative to the inner cup 1, the ejector pin 7 can press down the spring 8 and disengage from the tooth groove. After the swing angle adjustment is completed, the ejector pin 7 is connected to the tooth groove 12 under the action of the spring 8 to lock the relative position between the heat sink 2 and the inner cup 1. In addition, during the swing process, the ejector pin 7 will make a clicking sound when switching between multiple tooth grooves 12, thereby improving the feel of the lamp operation.

[0043] See Figure 3 As shown, in some embodiments of the present invention, the inner cup 1 is connected to an outer cup 9, and the outer cup 9 is rotatably connected relative to the inner cup 1. A retaining spring 10 is provided on the outer cup 9, and the outer cup 9 is fixed to the ceiling by the retaining spring 10. The inner cup 1 can rotate relative to the outer cup 9, and the heat sink 2 can swing relative to the inner cup 1, so that the light emitted by the lamp can be adjusted to the desired position at will.

[0044] In the prior art, the light source (LED) is usually placed higher than the mouth of the reflective cup, which results in a gap between the light source and the mouth of the reflective cup. Part of the light emitted by the light source will overflow from the gap and enter the heat sink. This part of the light is difficult to emit to form a light spot, resulting in a loss of light effect. Figure 4 As shown, in some embodiments of the present invention, the light source 4 is arranged below the cup opening of the reflective cup 5; in other embodiments, the light source 4 is arranged flush with the cup opening of the reflective cup 5. Almost all the light emitted by the light source 4 hits the reflective cup 5 and is reflected, further improving the light extraction rate.

[0045] See Figure 4 As shown, in some embodiments of the present invention, a dustproof plate 6 is provided in the heat sink 2, and the dustproof plate 6 is located above the lamp arm 3. The dustproof plate 6 prevents dust from entering and adhering to the reflective cup 5, thereby ensuring that the wall of the reflective cup 5 is clean and smooth, so that it always maintains a good reflective effect.

[0046] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A non-direct lighting fixture with high light output, characterized in that: include: An inner cup, wherein the inner cup has a first cut-off opening; A heat sink is hinged to the inner cup, the heat sink can swing relative to the inner cup, and the heat sink has a second cut-off opening; A lamp arm is arranged on the radiator, and a light source is arranged at the bottom of the lamp arm; A reflective cup, arranged in the radiator, and located below the light source; When the heat sink does not swing relative to the inner cup, the vertical projection of the second light-cutting opening is located within the vertical projection of the first light-cutting opening; When the heat sink swings to an end of a stroke relative to the inner cup, a vertical projection of the second light-cutting opening is located within a vertical projection of the first light-cutting opening.

2. The indirect lighting fixture with high light output according to claim 1, characterized in that: When the inner cup swings to an end of a stroke relative to the heat sink, a portion of the second light-cutting opening is located inside the first light-cutting opening.

3. The indirect lighting fixture with high light output according to claim 1, characterized in that: The heat sink is provided with a light exit hole, the opening of the light exit hole forms the second light cut-off opening, and the hole wall of the light exit hole is an inclined wall with a larger upper portion and a smaller lower portion.

4. The indirect lighting fixture with high light output according to claim 1, characterized in that: The inner cup has a light-through hole, the lower opening of which forms the first light-cutting opening. The hole wall of the light-through hole is an inclined wall that is larger at the top and smaller at the bottom. The first light-cutting opening is an inclined opening that gradually becomes higher along the swinging direction of the radiator.

5. The indirect lighting fixture with high light output according to claim 1, characterized in that: The bottom of the inner cup is provided with a plurality of tooth grooves, and the radiator is provided with an ejector pin, the upper end of the ejector pin is adapted to the tooth grooves, and the lower end is connected with a spring.

6. The indirect lighting fixture with high light output according to claim 1, characterized in that: The inner cup is connected to an outer cup, and the outer cup is rotatably connected relative to the inner cup.

7. An indirect lighting fixture with high light output according to any one of claims 1 to 6, characterized in that: The light source is arranged below the cup opening of the reflective cup; or, the light source is arranged flush with the cup opening of the reflective cup.

8. An indirect lighting fixture with high light output according to any one of claims 1 to 6, characterized in that: A dustproof plate is arranged in the radiator, and the dustproof plate is located above the lamp arm.

9. The indirect lighting fixture with high light output according to claim 1, characterized in that: The lamp is a spotlight.

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