CN110410754B

CN110410754B - Lighting device

Info

Publication number: CN110410754B
Application number: CN201910768523.3A
Authority: CN
Inventors: 刘超博
Original assignee: Opple Lighting Co Ltd
Current assignee: Opple Lighting Co Ltd
Priority date: 2017-05-26
Filing date: 2017-05-26
Publication date: 2020-12-11
Anticipated expiration: 2037-05-26
Also published as: CN107013885A; CN107013885B; CN110410754A

Abstract

The invention discloses a lighting device, which comprises a lamp body, an optical element connected with the lamp body, a light source assembly accommodated in the lamp body, a reflecting device used for secondary light distribution of the light source assembly, and a driving power supply assembly, wherein the reflecting device is annular and transparent, the reflecting device is provided with a light inlet and a light outlet which are positioned at two ends of the reflecting device, the reflecting device comprises an inner surface and an outer surface, the outer surface comprises a plurality of continuously arranged sawtooth structures, each sawtooth structure comprises a first reflecting surface and a second reflecting surface which are intersected, two ends of each sawtooth structure respectively extend towards the light inlet and the light outlet, and the light source assembly is arranged at the light inlet of the reflecting device; the lamp body comprises a bulge or a clamping structure, the optical element comprises a clamping structure or a bulge, and the bulge is accommodated in the clamping structure so as to realize clamping connection between the lamp body and the optical element. The lighting device of the invention can emit the light rays incident from the inner surface by the optical effect of total reflection, and improves the light emitting efficiency under the condition of not needing electroplating treatment.

Description

Lighting device

The present application is a divisional application of the original invention application (application No. 201710386879.1, application No. 2017, 5 and 26), and the name of the original application is "lighting device".

Technical Field

The invention belongs to the technical field of illumination, and particularly relates to an illumination device.

Background

The existing electroplating reflector is widely applied to commercial lamps, such as down lamps, spot lamps, ceiling lamps, outdoor lamps and other lighting lamps. The electroplated reflector mainly plays a role in secondary light distribution of light rays emitted by the light source. The electroplated reflector generally comprises a reflecting surface coated with a metal film, but because the coating material per se has a high light absorption rate, for example, the loss rate of the silver coating is 5%, the loss rate of the gold coating is 9%, and the loss rate of the aluminum coating is even as high as about 12%, the light extraction efficiency of a lamp using the electroplated reflector is low.

Disclosure of Invention

The present invention is directed to solving the above problems, and an object of the present invention is to provide a lighting device having high light extraction efficiency.

In order to achieve the above object, the present invention provides an illumination device, comprising a lamp body, an optical element connected to the lamp body, a light source assembly accommodated in the lamp body, a reflection device for secondary light distribution of the light source assembly, and a driving power supply assembly electrically connected to the light source assembly, wherein the reflection device is annular and transparent, the reflection device has a light inlet and a light outlet at two ends thereof, the reflection device comprises an inner surface and an outer surface,

the outer surface comprises a plurality of sawtooth structures which are continuously arranged, each sawtooth structure comprises a first reflecting surface and a second reflecting surface which are intersected, two ends of each sawtooth structure respectively extend towards the light inlet and the light outlet,

the light source assembly is arranged at the light inlet of the reflecting device.

Further, the thickness of the reflecting device is uniform.

Furthermore, the first reflecting surface and the second reflecting surface are perpendicular to each other and are total reflecting surfaces.

Furthermore, the first reflecting surface and the second reflecting surface of the sawtooth structure are intersected to form a ridge line, and the ridge line is a straight line or an arc line.

Further, the inner surface of the reflecting device is a smooth wall surface.

Further, the diameter of the light inlet is smaller than or equal to that of the light outlet.

Furthermore, two ends of the sawtooth structure extend to the light inlet and/or the light outlet.

Further, the lighting device further comprises a heat dissipation member accommodated in the lamp body, and the light source assembly and the driving power supply assembly are accommodated in the heat dissipation member.

Further, the upper end surface and/or the lower end surface of the heat dissipation member abut against the space between the face shield and the lamp body.

Further, the light source assembly and the driving power supply assembly are arranged in an integrated mode or in a split mode.

Furthermore, the driving power supply assembly and the light source assembly are arranged in a split mode, the driving power supply assembly comprises an annular power supply board and a driving power supply located on one side of the power supply board, and the light source assembly is located on the inner side of the power supply board.

Further, the light source assembly comprises a light source plate and a plurality of light emitting units positioned on the light source plate.

Furthermore, the lighting device also comprises a connecting piece sleeved on the periphery of the lamp body, and the connecting piece is respectively connected with the lamp body and the optical element.

Further, the optical element comprises a surface ring and a light homogenizing plate positioned on the inner side of the surface ring.

Furthermore, the surface ring comprises a vertical circular ring-shaped body and a horizontal circular ring-shaped ring surface integrally connected with the body, and the body is connected with the lamp body.

Furthermore, the lighting device further comprises two clamp springs, and the clamp springs are connected to the outer side of the connecting piece.

Furthermore, the lighting device also comprises a driving power supply box connected with the lamp body, and the driving power supply assembly is contained in the driving power supply box.

Further, the lighting device comprises a first-stage reflector and a second-stage reflector, the reflecting device is the first-stage reflector, and the optical element is the second-stage reflector and is in a reflector structure.

Furthermore, the lighting device also comprises a light homogenizing plate, the light homogenizing plate covers the light outlet of the reflecting device, and the reflecting cover is positioned above the light homogenizing plate.

Further, the optical element comprises a surface ring positioned outside the reflecting cover, and the surface ring is connected with the lamp body.

Furthermore, part of the light rays emitted by the light source assembly are directly emitted from the light outlet, part of the light rays are reflected by the reflecting device and then emitted from the light outlet, and part of the light rays enter from the light inlet, enter the first reflecting surface through the inner surface, are reflected to the second reflecting surface through the first reflecting surface, and are emitted from the light outlet after being reflected to the inner surface through the second reflecting surface.

Has the advantages that: compared with the prior art, the lighting device provided by the embodiment of the invention has the advantages that the reflecting device in the lighting device is annular and transparent, and the outer surface of the sawtooth structure which is continuously arranged is used as the reflecting surface, so that the light rays incident from the inner surface can be emitted with the optical effect of total reflection, and the light emitting efficiency is improved under the condition that electroplating treatment is not needed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic perspective view of a lighting device provided in embodiment 1 of the present invention;

FIG. 2 is an exploded schematic view of the lighting device of FIG. 1;

FIG. 3 is an exploded view of the lighting device of FIG. 1 from another angle;

fig. 4 is a schematic perspective view of a reflection device in an illumination device provided in embodiment 1 of the present invention;

FIG. 5 is a cross-sectional view taken along line A-A in FIG. 1;

fig. 6 is a schematic view of a light path in a vertical direction, which is exemplified by a single sawtooth structure, according to embodiment 1 of the present invention;

fig. 7 is a schematic diagram of an optical path in a horizontal direction, which is an example of a single sawtooth structure, according to embodiment 1 of the present invention;

fig. 8 is another optical path diagram in the horizontal direction, which is an example of a single sawtooth structure, according to embodiment 1 of the present invention;

fig. 9 is a schematic perspective view of a lighting device according to embodiment 2 of the present invention;

FIG. 10 is an exploded schematic view of the lighting device of FIG. 9;

FIG. 11 is an exploded view from another angle of the lighting device of FIG. 9;

FIG. 12 is a cross-sectional view taken along line B-B of FIG. 9;

fig. 13 is a schematic perspective view of a lighting device according to embodiment 3 of the present invention;

FIG. 14 is an exploded schematic view of the lighting device of FIG. 13;

FIG. 15 is an exploded view of another angle of the lighting device of FIG. 13;

fig. 16 is a sectional view taken along line C-C in fig. 13.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1 to 4, an embodiment of the invention provides an illumination device 100a, which is a spotlight. Specifically, the illumination device 100a includes a lamp body 1a, an optical element 2a connected to the lamp body 1a, a heat sink 6a housed in the lamp body 1a, a driving power supply unit 4a housed in the heat sink 6a, a light source unit 3a, and a reflector 5a for secondarily distributing light to the light source unit 3a, wherein the light source unit 3a is provided at one end of the reflector 5 a. The reflecting device 5a is in the shape of a cup ring and is transparent, and a part of the light emitted by the light source assembly 3a directly exits through the optical element 2a, and a part of the light is reflected by the reflecting device 5a and then exits through the optical element 2 a.

The following is a detailed description of each element and the connection relationship between the elements in the illumination device 100a according to the embodiment of the present invention.

As shown in fig. 2, the lamp body 1a has a cylindrical shape, the lamp body 1a and the optical element 2a are connected to form a housing cavity 10a, and the light source unit 3a, the driving power supply unit 4a, the reflector 5a, and the heat sink 6a are housed in the housing cavity 10 a. Specifically, the lamp body 1a includes a bottom wall 11a and a side wall 12a, and a plurality of protrusions 121a are disposed on an inner surface of the side wall 12a, and in other alternative embodiments, they may be grooves. The lamp body 1a can be made of heat-conducting metal materials such as aluminum, and can also be integrally formed by heat-conducting plastic or plastic-aluminum material, so that the lamp body 1a has high heat-conducting performance, and when the light source assembly 3a in the accommodating cavity 10a generates heat, the heat can be rapidly dissipated through the lamp body 1a, thereby avoiding the influence on the service quality and the service life of the light source assembly 3a due to overhigh temperature in the accommodating cavity 10 a.

As shown in fig. 2, 3 and 5, the optical element 2a is circular and is in snap-fit connection with the lamp body 1a, and in the present embodiment, the optical element 2a plays a role of light evening. Specifically, the optical element 2a includes a circular top wall 21a and a plurality of catch structures 22a and abutment structures 23a extending downwardly from the top wall 21 a. Wherein, the protrusion 121a is received in the retaining structure 22a, so as to realize the clamping between the lamp body 1a and the optical element 2 a. The abutting structure 23a is for abutting the heat sink 6a against the lamp body 1 a.

The heat sink 6a is in the shape of a cover, and the light source unit 3a and the driving power supply unit 4a are both housed in the heat sink 6 a. In the present embodiment, the heat sink 6a is in contact with the lamp body 1a and the optical element 2a, specifically, the lower surface of the heat sink 6a is in contact with the bottom wall 11a of the lamp body 1a, and the upper end surface of the heat sink 6a is in contact with the end surface of the contact structure 23a of the optical element 2 a. The heat sink 6a may be made of a heat conductive metal material such as aluminum, or may be integrally formed of a plastic-coated aluminum material.

As shown in fig. 2 and 3, the light source assembly 3a includes a light source board 31a and light emitting units 32a on the light source board 31 a. Specifically, the light emitting unit 32a is disposed in the middle of the light source plate 31a, i.e., in the middle of the reflecting device 5a having one end opened. In the present embodiment, the light emitting units 32a are LED light sources, the number of the light emitting units 32a may be one or multiple, and when the number of the light emitting units 32a is multiple, the light emitting units 32a need to be intensively disposed in the central region of the light inlet 15 a. In the present embodiment, the light source board 31a is fixed inside the heat sink 6a, and is positioned by a positioning surface (not labeled) provided on the lamp body 1 a.

The driving power supply unit 4a includes a ring-shaped power supply plate 41a and an LED driving power supply 42a on the power supply plate 41a side. In the present embodiment, the power supply board 41a is located outside the light source board 31a and above the light source board 31 a. The LED drive power supply 42a includes several components including, but not limited to, an LED drive controller chip, a rectifier chip, a resistor, a capacitor, a fuse, a coil, and the like. The lighting device 100a of the present embodiment further includes a power cord 7a, the power cord 7a extends into the lamp body 1a and is soldered to the power board 41a, the power board 41a transmits external power to the LED driving power source 42a, and the LED driving power source 42a further drives the LED light source 32a to emit light.

In other alternative embodiments, the LED light source 32a and the LED driving power source 42a can also be integrated on the same substrate (not shown) by Through Hole Technology (THT) or Surface Mount Technology (SMT). LED drive power supply 42 a: the LED light source can be partially mounted on one side of the substrate, which is provided with the LED light source 32a, and the other side of the substrate is provided with a component of the plug-in type driving power supply for reducing the cost; it is also possible that the substrate is fully tiled on one side provided with LED light sources 32a, or fully or partially tiled on the other side.

As shown in fig. 2 to 5, the reflection device 5a uses a lens as the reflection wall 50a, which is annular and has a uniform thickness, and the reflection wall 50a encloses an optical space 501 a. Such structure is similar to current reflection of light cup, and the material has only adopted transparent material, and the outward appearance is penetrating, and easily replaces with current reflection of light cup. Specifically, the reflection device 5a has an inner surface 51a, an outer surface 52a, a first end surface 53a, a second end surface 54a, a light inlet 55a of the reflection device 5a is located on the first end surface 53a, a light outlet 56a is located on the second end surface 54a, the light inlet 55a and the light outlet 56a are communicated with the optical space 50a, and the light inlet 55a is closed by the light source plate 31 a. The inner surface 51a has a smooth wall surface, and is a light incident surface of the reflection device 5a and a light emitting surface of the reflection device 5 a. The outer surface 52a includes a plurality of serrations 520a arranged in series. Each sawtooth structure 520a includes a first reflective surface 521a and a second reflective surface 522a, and the first reflective surface 521a and the second reflective surface 522a are perpendicular to each other and intersect with a ridge, which may be a straight line or an arc. Both ends of each of the saw-tooth structures 520a extend to the first end surface 53a and the second end surface 54a, respectively, so that light can be totally reflected when being incident on the reflective wall 50 a. In other embodiments, the included angle between the first reflective surface 521a and the second reflective surface 522a may not be 90 °, i.e. may be smaller or larger than 90 °, and the light efficiency of the reflective device 5a is optimal when the included angle of the sawtooth structure 520a is 90 °, and the emergent light may be subjected to mirror total reflection along the incident light direction. The included angle of the sawtooth structure 520a is smaller than or larger than 90 degrees, the emergent angle formed by reflection of the original bus is changed, and the light effect is reduced.

In the present embodiment, the diameter of the light inlet 55a is smaller than that of the light outlet 56a, and in other alternative embodiments, the diameter of the light inlet 55a may also be equal to that of the light outlet 56a, i.e. the reflection device 5a has a straight cylinder shape. The reflecting device 5a is made of transparent plastic or glass material, wherein the plastic material can be selected from PMMA, PC, etc. The thinnest thickness of the reflector 5a can be made 2 millimeters (mm), thus saving material costs and molding difficulty when the reflector 5a is large in size.

In addition, when designing or molding a mold, a rounded corner is formed at the intersection of the first reflecting surface 521a and the second reflecting surface 522a of the reflector 5a due to a problem of processing accuracy, light incident on the rounded corner is refracted to form stray light, the larger the rounded corner is, the smaller the central light intensity is, and the more the stray light is, but the rounded corner formed by the conventional processing accuracy has little influence on the total luminous efficiency and the beam angle of the reflector 5a, and therefore, the reflector 5a is considered to be a total reflection lens.

The following description will specifically describe the light emitted from the light emitting unit 32a and entering the inner surface 51a of the reflecting device 5 a.

As shown in fig. 4 to 8, the light emitted from the light emitting unit 32a enters from the light inlet 55a, part of the light directly exits from the light outlet 56a to the optical element 2a and then exits, and part of the light is reflected by the reflecting device 5a and then exits from the light outlet 56a, and finally exits from the optical element 2 a. Reflecting on the sawtooth structure 520a, the optical path is specifically: light is incident from the inner surface 51a to the outer surfacePoint a of the first reflecting surface 521a on the first reflecting surface 52a is totally reflected to point b of the second reflecting surface 522a, is totally reflected by the second reflecting surface 522a to return to the inner surface 51a, is refracted by the inner surface 51a to enter the optical space 50a, is emitted from the light outlet 56a, and is finally emitted from the optical element 2 a. As shown in fig. 7, for the single sawtooth structure 520a, when the light beam strikes the point a on the first reflecting surface 521a, the light beam is reflected to the point b of the second reflecting surface 522a according to the principle of total reflection, and then is reflected by the point b of the second reflecting surface 522a, and finally the emergent light beam and the incident light beam conform to the relationship of the total reflection angle. It is known that to achieve total reflection inside the lens, the angle of incidence between the light and the reflecting surface must be sufficiently large that the light will be transmitted, and this angle will vary depending on the material of the lens. As can be seen from fig. 7, if there is no sawtooth structure disposed on the light emitting surface, that is, the light emitting surface and the light incident surface are parallel, the incident angle is 0 ° when the light reaches the reflecting surface, so that the light cannot be totally reflected and can only be transmitted, and when the light reaches the point a of the first reflecting surface 521 after the sawtooth structure is added, the incident angle is 45 ° and is greater than the critical angle, so that the total reflection can be achieved. When the light emitting unit 32a is located at the center of the light inlet, since the reflecting device 5a is annular in this embodiment, the light emitting unit 32a should be located at the center of the circle, and the light emitted therefrom is perpendicular to the inner surface 51a as viewed from the horizontal direction for each position on the inner surface 51a, and as described above, total reflection can be achieved when the light reaches the outer surface 52a and the incident angle of the reflecting surface is 45 °. However, as shown in fig. 2 and 8, since the light emitting unit 32a is a light emitting surface having a certain area, the light source incident angle α is constant when the light enters the light entrance surface 51a₁When the light is refracted and reaches the first reflecting surface of the sawtooth structure 520a, the incident angle is 45 minus alpha₁Since the reduction of the incident angle does not ensure the realization of the total reflection, it is desirable to avoid the occurrence of such a situation as much as possible by concentrating the light emitting unit 32a in the central region of the light inlet 55a so that the incident angle α is small₁As small as possible. For the incident angle alpha₁Of different materials, the allowable angle of incidence α of which is₁In different ranges, forLens made of PMMA, alpha₁4.4 DEG or less, and alpha of lens made of PC₁Is less than or equal to 9.5 degrees. Since the sawtooth structure 520a is a rectangular prism surface in the present embodiment, the exit angle α₂Equal to the angle of incidence alpha₁. In non-orthogonal configurations, the exit angle α₂With respect to the incident angle alpha₁Can be changed to form different light effects.

Example 2

As shown in fig. 9 to 12, an embodiment of the present invention provides an illumination device 100b, which is a downlight. Specifically, the lighting device 100b includes a lamp body 1b, an optical element 2b connected to the front end of the lamp body 1b, a connecting member 6b sleeved on the periphery of the lamp body 1b, two clamp springs 8b connected to the connecting member 6b, a driving power supply box 7b connected to the rear end of the lamp body 1b, a light source module 3b accommodated in the lamp body 1b, a reflector 5b for secondary light distribution of the light source module 3b, and a driving power supply module 4b accommodated in the driving power supply box 7b and electrically connected to the light source module 3b, wherein the light source module 3b is disposed at one end of the reflector 5 b. It should be noted that the reflecting device 5b is annular and transparent, and a part of the light emitted by the light source assembly 3b directly exits through the optical element 2b, and a part of the light is reflected by the reflecting device 5b and then exits through the optical element 2 b.

The following is a detailed description of each element and the connection relationship between the elements in the illumination device 100b according to the embodiment of the present invention.

As shown in fig. 10 to 12, the lamp body 1b is cylindrical and includes a bottom wall 11b and a side wall 12b, the bottom wall 11b is provided with a plurality of first through holes 111b, the upper end of the side wall 12b extends to form an annular connecting surface 120b, and the connecting surface 120b is provided with a plurality of notches 121 b. In the present embodiment, the notch 121b has a semicircular shape. The lamp body 1b can be made by heat conduction metal materials such as aluminium, also can make by heat conduction plastic, therefore lamp body 1b has high heat conductivility, when being located the light source subassembly 3b heat production in the lamp body 1b, the heat can be passed through lamp body 1b and dispeled rapidly to avoid the high temperature in the lamp body 1b and influence the quality of use and the life of light source subassembly 3 b.

As shown in fig. 10 to 12, the optical element 2b has a light-homogenizing function, and specifically, it includes a surface ring 21b and a light-homogenizing plate 22b located inside the surface ring 21b, in this embodiment, the light-homogenizing plate 22b abuts between the surface ring 21b and the reflecting device 5b, and in other alternative embodiments, the light-homogenizing plate 22b may be fixed in the lighting device 100b by other fixing means. The surface ring 21b may be made of a metal material or plastic, and includes a vertical circular ring-shaped body 211b and a horizontal circular ring-shaped ring surface 212b integrally connected to the body 211 b. Specifically, the inner surface of the body 211b is provided with a plurality of first connection structures 2110b, the first connection structures 2110b include a protrusion 2111b and locking strips 2112b located at two sides of the protrusion 2111b, and the locking strips 2112b extend along the axial direction of the body 211 b. The body 211b is provided with a plurality of positioning posts 2113b, the positioning posts 2113b extend along the axial direction, and the end surfaces of the positioning posts 211b exceed the end surface of the body 211 b.

The connecting piece 6b is circular, and a plurality of second connecting structures 610b and third connecting structures 620b are arranged on the outer side surface of the connecting piece 6 b. Specifically, the second connecting structure 610b includes a holding block 611b and positioning grooves 612b located at both sides of the holding block 611b, and the positioning grooves 612b extend in the axial direction of the connecting member 6 b. The third connecting structure 620b includes a connecting plate (not labeled) provided with a second through hole 6211b and a circlip mounting portion 6212 b. In this embodiment, the first connecting structure 2110b is connected to the second connecting structure 610b to connect the connecting member 6b to the face ring 22b, specifically, the locking strip 2112b is received in the positioning groove 612b to position the connecting member 6b to the face ring 21b, and the protrusion 2111b is locked to the lower surface of the positioning groove 612b to connect the connecting member 6b to the face ring 22 b. Meanwhile, the lighting device 100b of the present embodiment further includes a screw (not shown) which is received in the positioning post 2113b through the second through hole 6211b to further reinforce the connection between the connecting member 6b and the surface ring 22b, and the upper and lower surfaces of the connecting surface 120b are abutted between the surface ring 22b and the connecting member 6b, and the positioning post 2113b is positioned outside the notch 121b to fix the lamp body 1b between the surface ring 22b and the connecting member 6 b. In other alternative embodiments, the optical element 2b may be directly connected to the lamp body 1b without the connecting member 6b, and the clamp spring 8b may be connected to the optical element 2 b.

In this embodiment, the latch spring 8b is made of a metal material, and is latched in the latch spring mounting portion 6212 b.

As shown in fig. 10 to 12, the driving power supply box 7b includes a lid-like lower cover 71b and a plate-like upper cover 72b, and the lower cover 71b and the upper cover 72b are snap-connected to each other. The outer surface of the upper cover 72b is convexly provided with a plurality of connecting columns 721b, and the connecting columns 721b penetrate through the first through holes 111b to be connected with the light source assembly 3 b. The lower cover 71b includes a first cover 711b and a second cover 712b, and the first cover 711b is snap-fit connected to the upper cover 72 b. The second cover 712b and the first cover 711b are detachably assembled.

The driving power supply unit 4b is connected to the inner surface of the upper cover 72b, and specifically, the driving power supply unit 4a includes a ring-shaped power supply plate 41b and an LED driving power supply 42b located on the side of the power supply plate 41b, and in this embodiment, the power supply plate 41b is connected to the upper cover 72b by a snap fit. The LED drive power supply 42b includes several components including, but not limited to, an LED drive controller chip, a rectifier chip, a resistor, a capacitor, a fuse, a coil, and the like. The lighting device 100b of the present embodiment further includes a power cord (not shown) extending into the lower cover 71b and welded to the power board 41b, the power board 41b transmits external power to the LED driving power source 42b, and the LED driving power source 42b further drives the light source assembly 3b to emit light. In the present embodiment, the second cover 712b and the power supply board 41b are fixedly connected by screws (not shown), so that the lower cover 71b and the power supply board 41b are fixedly connected.

In the present embodiment, the second cover 712b is inserted into the first cover 711b, so that the first cover 711b and the second cover 712b are not movable in the vertical direction, and the second cover 712b and the power board 41b are detachably fixed by screws (not shown).

As shown in fig. 10 to 12, the light source assembly 3b includes a light source plate 31b and a light emitting unit 32b on the light source plate 31 b. Specifically, the light emitting unit 32b is disposed in the middle of the light source board 31b, i.e., in the middle of the reflecting device 5b having one end opened. In the present embodiment, the light emitting unit 32b is an LED light source, and the light emitting unit 32b is provided in plurality and arranged in an array on the light source plate 31 b. In other alternative embodiments, the driving power supply module 4b may be directly integrated on the light source substrate 31b, and the driving power supply box 7b may be retained but only matched in shape with the existing lamp body 1b, and may be empty therein.

As shown in fig. 10 to 14, the reflection device 5b uses a lens as the reflection wall 50b, which is annular and has a uniform thickness, and the reflection wall 50b encloses an optical space 501 b. The structure and the optical path of the reflection device are similar to those of the reflection device 5a in the embodiment, specifically, the reflection device 5b includes an inner surface 51b, an outer surface 52b, a light inlet 55b and a light outlet 56b, the outer surface 52b is provided with a sawtooth structure 520b, the light inlet 55b and the light outlet 56b are communicated with the optical space 50b, and the light source plate 31b closes the light inlet 55 b. The reflecting device 5b is different from the reflecting device 5b in that the diameters of the light entrance and light exit of the two reflecting devices are different.

Since the light emitting unit 22b has a plurality of light emitting surfaces arranged in the light source plate 21b to have a predetermined area, the light source incident angle α when the light enters the light incident surface 51b₁The following conditions also need to be satisfied: for lenses made of PMMA, alpha₁4.4 DEG or less, and alpha of lens made of PC₁≤9.5°。

Example 3

As shown in fig. 13 to 16, an embodiment of the present invention provides an illumination device 100c, which includes a lamp body 1c, an optical element 2c connected to a front end of the lamp body 1c, a surface ring 6c for connecting the lamp body 1c and the optical element 2c, a light source assembly 3c housed in the lamp body 1c, a reflector 5c for secondary light distribution of the light source assembly 3c, and a light-homogenizing plate 4c for covering a light outlet of the reflector 5c, wherein the light source assembly 3c is disposed at one end of a light inlet of the reflector 5 c. It should be noted that the reflection device 5c is annular and transparent, a part of the light emitted by the light source assembly 3c directly exits through the light uniformizing plate 4c, a part of the light is reflected by the reflection device 5c, and then the light is uniformized by the light uniformizing plate 4c and finally exits through the optical element 2 c. The lighting device 100c of this embodiment is a two-stage reflective downlight, the reflecting device 5c is a primary reflector, and the optical element 2c is a secondary reflector. The lighting device 100c has high luminous efficiency and does not have large-angle stray light.

The following is a detailed description of each element and the connection relationship between the elements in the illumination device 100c according to the embodiment of the present invention.

As shown in fig. 13 to 16, the lamp body 1c is in a cover shape, and includes a bottom wall 11c and a side wall 12c, and a plurality of first receiving posts 121c and second receiving posts 122c are provided on an inner surface of the side wall 12 c. The lamp body 1c can be made by heat conduction metal materials such as aluminium, also can be made by heat conduction plastic, and the lateral wall 12c surface of lamp body 1c is equipped with heat radiation fins, and consequently lamp body 1c has high heat conductivility, and when being located the light source subassembly 3c in the lamp body 1c and producing heat, the heat can be passed through lamp body 1c and dispeled rapidly to avoid the high temperature in the lamp body 1c and influence the service quality and the life of light source subassembly 3 c.

As shown in fig. 13 to 16, the light source assembly 3c includes a light source plate 31c and a light emitting unit 32c on the light source plate 31 c. Specifically, the light source board 31c is fixed to the bottom wall 11c of the lamp body 1c by screws (not shown), and the light emitting unit 32c is disposed in the middle of the light source board 31c, i.e., in the middle of the one-end opening of the reflecting device 5 c. In the present embodiment, the light emitting unit 32c is an LED light source, and the light emitting unit 32c is provided in plural numbers and arranged in a circumferential array on the light source plate 31 c. A drive power supply unit (not shown) is provided outside the lamp body 1c, and a power supply lead 7c connected to the drive power supply unit is connected to the light source plate 31c to drive the light emitting unit 32c to emit light.

As shown in fig. 14 to 16, the reflecting device 5c uses a lens as the reflecting wall 50c, which is annular and has a uniform thickness, and the reflecting wall 50c encloses an optical space 501 c. The main structure and optical path of the first reflection device 5c are similar to those of the reflection device 5a in embodiment 1, specifically, the first reflection device 5c includes an inner surface 51c, an outer surface 52c, a light inlet 55c and a light outlet 56c, the outer surface 52c is provided with a sawtooth structure 520c, the light inlet 55c and the light outlet 56c are communicated with the optical space 501c, and the light source plate 31c closes the light inlet 55 c. The reflecting device 5c is different from the reflecting device 5a in that the end of the light outlet 56c is integrally connected with a horizontal ring surface 57c, and the diameters of the light inlet and the light outlet of the two reflecting devices are different. Specifically, the horizontal ring surface 57c is convexly provided with a plurality of clamping structures 571c for fixing the light homogenizing plate 4 c; the ring surface 57c is further provided with a plurality of third through holes 572c, and the lighting device 100c of this embodiment further includes screws (not shown), and the screws pass through the third through holes 572c and are received in the first receiving columns 121c, so as to realize connection between the first reflecting device 5c and the lamp body 1 c.

In the present embodiment, the light-homogenizing plate 4c is fastened to the reflecting device 5c, and in other alternative embodiments, the light-homogenizing plate 4c can be fixed in the lighting device 100c by other fixing methods.

As shown in fig. 14 to 16, the surface ring 6c may be made of a metal material or a plastic material, and includes a vertical annular body 61c and a horizontal annular surface 62c integrally connected to the body 61 c. Specifically, the body 61c extends inward to form a connecting plate 610c, and a plurality of fourth through holes 611c penetrate the connecting plate 610c vertically. The lighting device 100c of the present embodiment further includes a screw (not shown), and the screw is received in the second receiving column 122c through the fourth through hole 611c, so that the surface ring 6c and the lamp body 1c are connected. The connecting plate 610c is further provided with a first retaining structure 612c and a second retaining structure 613c, the first retaining structure 612c is a concave groove, and the second retaining structure 613c comprises a retaining groove.

The optical element 2c is a second-stage reflector, in the form of a hood, which is located inside the face ring 6c and is connected to the face ring 6 c. The optical element 2c has a shading angle to eliminate the effect of stray light at large angles. The optical element 2c comprises a plated or painted side wall 21c, the side wall 21c having only a reflective function. The outer surface of the side wall 21c is provided with a plurality of first protruding structures 211c and second protruding structures 212c, the first protruding structures 211c are connected with the first retaining structures 212c in a buckling manner, and the second protruding structures 212c are connected with the second retaining structures 212c in a buckling manner, so that the connection between the light-emitting cover optical element 2c and the surface ring 6c is realized.

In summary, in the illumination device provided in the embodiments of the present invention, the lens is used as a reflection device, the outer surface of the lens includes a plurality of continuously arranged saw-tooth structures, the inner surface of the lens serves as both the light incident surface and the light exiting surface, and the outer surface of the lens includes the first reflection surface and the second reflection surface.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lighting device is characterized by comprising a lamp body, an optical element connected with the lamp body, a light source component accommodated in the lamp body, a reflecting device used for distributing light for the light source component, and a driving power supply component electrically connected with the light source component, wherein the reflecting device is annular and transparent, the reflecting device is provided with a light inlet and a light outlet which are positioned at two ends of the reflecting device, the reflecting device comprises an inner surface and an outer surface,

the light source assembly is arranged at the light inlet of the reflecting device;

the lamp body comprises a bulge or a clamping structure, the optical element comprises a clamping structure or a bulge, the bulge is accommodated in the clamping structure to realize clamping connection between the lamp body and the optical element,

the reflecting device is a first-stage reflector, the optical element is a second-stage reflector and is in a reflector structure, the illuminating device comprises a light homogenizing plate, the light outlet of the reflecting device is covered by the light homogenizing plate, and the reflector is located above the light homogenizing plate.

2. A lighting device as recited in claim 1, wherein said reflecting means is of uniform thickness.

3. A lighting device as recited in claim 1, wherein said first reflecting surface and said second reflecting surface are perpendicular to each other and are all reflecting surfaces.

4. A lighting device as recited in claim 1, wherein said first and second reflective surfaces of said sawtooth structure intersect to form a ridge, said ridge being a straight line or an arc.

5. A lighting device as recited in claim 1, wherein said inner surface of said reflector is smooth walled.

6. A lighting device as recited in claim 1, wherein a diameter of said light inlet is less than or equal to a diameter of said light outlet.

7. A lighting device as recited in claim 1, wherein two ends of said sawtooth structure extend to said light inlet and/or said light outlet.

8. A lighting device as recited in claim 1, further comprising a heat sink housed within said lamp body, said light source assembly and drive power supply assembly both being housed within said heat sink.

9. A lighting device as recited in claim 8, wherein upper and lower end surfaces and/or surfaces of said heat dissipation element abut between said optical element and said lamp body.

10. The illumination device as recited in claim 1, wherein the light source module and the driving power module are integrally or separately disposed.

11. The lighting device as claimed in claim 1, wherein the driving power supply assembly is provided separately from the light source assembly, the driving power supply assembly includes a ring-shaped power supply board and a driving power supply disposed at one side of the power supply board, and the light source assembly is disposed at an inner side of the power supply board.

12. The illumination device as recited in claim 1, 10 or 11, wherein the light source assembly comprises a light source board and a plurality of light emitting units on the light source board.

13. A lighting device as recited in claim 1, further comprising a connecting element disposed around the periphery of said lamp body, said connecting element being connected to said lamp body and said optical element, respectively.

14. A lighting device as recited in claim 13, wherein said optical element comprises a face ring and a light spreader plate positioned inside said face ring.

15. The lighting device of claim 14, wherein the surface ring comprises a vertical circular ring-shaped body and a horizontal circular ring-shaped surface integrally connected with the body, and the body is connected with the lamp body.

16. A lighting device as recited in claim 13, further comprising two snap springs, said snap springs being connected to an outer side of said connecting element.

17. A lighting device as recited in claim 13, further comprising a drive power supply box connected to said lamp body, said drive power supply assembly being housed in said drive power supply box.

18. A lighting device as recited in claim 1, wherein said optical element comprises a face ring located outside of said reflector, said face ring being connected to said lamp body.

19. The illumination device as recited in claim 1, wherein a portion of the light emitted from the light source assembly directly exits from the light exit opening, a portion of the light is reflected by the reflection device and then exits from the light exit opening, a portion of the light enters from the light entrance opening, enters the first reflection surface through the inner surface, is reflected by the first reflection surface to the second reflection surface, and exits from the light exit opening after being reflected by the second reflection surface to the inner surface.