CN216591113U - Light guide element and lamp - Google Patents

Abstract

The utility model provides a light guide element and a lamp, wherein the light guide element is used for guiding light rays emitted by a light source, the light guide element is provided with a light incoming part and a light guide part, the light source is placed below the light incoming part, one side of the light incoming part, which is close to the light source, is sunken to form a light incoming surface, and the light incoming surface is a curved surface; the light guide part is arranged beside the light inlet part and connected with the light inlet surface, so that light rays emitted by the light source enter the light guide part after passing through the light inlet surface and are transmitted inside the light guide part, and the light rays in the light guide part are emitted out through the light outlet surface in a transmission way. The utility model can realize side lighting of the light guide element by direct type arrangement of the light sources and matching with the light inlet part on the light guide element, thereby realizing the ultrathin shape of the lamp, increasing the creepage distance of the light sources, and improving the light emitting rate of the whole lamp and the natural softness of light rays.

Description

Light guide element and lamp

Technical Field

The utility model relates to a light guide element and a lamp, and belongs to the technical field of lamps.

Background

At present, lamps and lanterns such as down lamp, ceiling lamp both need realize ultra-thinly, guarantee light-emitting efficiency again, generally arrange through a large amount of LED are intensive to realize ultra-thinly, or LED side pastes cooperation light guide plate and realizes that lamps and lanterns are ultra-thin. If adopt first scheme, the LED in the lamps and lanterns is in large quantity, and is with high costs to a large amount of LEDs can bring the potential safety hazard on the circuit. If adopt the second kind of scheme, light guide plate thickness and light source board width are less usually, lead to LED creepage distance less, have the potential safety hazard, and the light guide plate bumps LED easily when the equipment moreover, leads to whole lamp equipment defective rate high.

In view of the above, a new light guide element and a lamp using the same are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a light guide element, which at least solves the problems of small creepage distance of an LED, high defective rate of the whole lamp assembly and low light emitting rate of the whole lamp.

In order to achieve the above object, the present invention provides a light guide element for guiding light emitted from a light source, the light guide element having a light incident portion and a light guide portion, the light source being disposed below the light incident portion, one side of the light incident portion, which is close to the light source, being recessed to form a light incident surface, the light incident surface being a curved surface; the light guide part is provided with a light emitting surface, the light guide part is arranged beside the light incident part and is connected with the light incident surface, so that light rays emitted by the light source enter the light guide part after passing through the light incident surface and are transmitted inside the light guide part, and the light rays in the light guide part are emitted out through the light emitting surface in a transmission way.

As a further improvement of the present invention, the light incident surface includes a first light incident surface and a second light incident surface, the light guide portion includes a first light guide portion and a second light guide portion located at two sides of the light incident portion, the first light guide portion is connected to the first light incident surface, the second light guide portion is connected to the second light incident surface, and a thickness of the first light guide portion and/or a thickness of the second light guide portion gradually decrease along a direction away from the light incident portion.

As a further improvement of the present invention, a maximum thickness of the second light guide part near the light incident part is smaller than a maximum thickness of the first light guide part near the light incident part; the light incident part is positioned between the first light guide part and the second light guide part, and the thickness of the light incident part is small in the middle and large on two sides.

As a further improvement of the present invention, the first light guide part and the second light guide part each have a thickness of 0.6mm to 4 mm.

As a further improvement of the present invention, the first light guide portion includes a first light guide surface disposed on a side close to the light source and a second light guide surface disposed opposite to the first light guide surface, the second light guide surface is parallel to the horizontal plane, and the first light guide surface is gradually inclined upward from the first incident surface in a direction away from the first incident surface.

As a further improvement of the present invention, the light guide element is annularly disposed, the light incident portion surrounds the second light guide portion, the first light guide portion surrounds the light incident portion, and a light exiting surface of the first light guide portion is provided with a light destructive structure to destroy total reflection of light in the first light guide portion.

As a further improvement of the present invention, the photo-destructive structure is a stepped microstructure.

As a further improvement of the present invention, the curved surface of the first incident surface and/or the second incident surface each protrudes toward the light source side.

The utility model also aims to provide a lamp, so as to better apply the light guide element.

In order to achieve the purpose, the utility model provides a lamp which comprises a lamp body, a light source component, a light guide element and a face mask which are assembled and matched with each other, wherein a lamp cavity is formed in the lamp body, the light source component is fixed in the lamp cavity, and the light guide element is the light guide element.

As a further improvement of the utility model, a positioning part protrudes from the edge of the light guide element, and a matching part matched with the positioning part is arranged on the inner side wall of the lamp body; the light guide element is fixed in the lamp cavity through the mutual matching of the positioning part and the matching part.

As a further improvement of the present invention, the positioning portion is a buckle protruding outward from an edge of the light guide element, the matching portion is a slot concavely formed on an inner side wall of the lamp body, and the buckle is accommodated in the slot to fix the light guide element in the lamp body.

As a further improvement of the present invention, the light source assembly includes a light source board and beads fixed on the light source board, one surface of the light source board close to the light guide element is sprayed with ink, and the beads are uniformly distributed on the light source board and located at a central position below the light incident portion of the light guide element.

As a further improvement of the present invention, the lamp is a down lamp, the lamp body, the light source assembly, the light guide element and the mask are all arranged in a circular shape, and the mask covers the outer side of the light guide element and is fixedly connected with the lamp body to seal the lamp cavity.

The utility model has the beneficial effects that: the light guide element not only effectively increases the creepage distance of the light source, but also effectively improves the light-emitting rate of the light source through the light incident surface which is formed by the concave part and is arranged in a curved surface; the lamp provided by the utility model has the advantages that the direct type arrangement of the light guide element and the light source component is matched with the concave light inlet part on the light guide element, so that the light guide element realizes side light emission, the ultrathin shape of the lamp is realized, and the light emitting rate and the natural softness of light rays of the whole lamp are improved.

Drawings

FIG. 1 is a perspective view of a light fixture in accordance with a preferred embodiment of the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is an exploded view of the lamp body and the light guide member of fig. 2.

Fig. 4 is a schematic view of the structure of fig. 2 in which the LEDs are fixed on the light source board.

Fig. 5 is a schematic structural diagram of the light guide element in fig. 2.

Fig. 6 is another angle structure diagram of the light guide element shown in fig. 5.

Fig. 7 is a cross-sectional view of the light guiding element and light source module of fig. 2 in cooperation with each other.

Fig. 8 is a ray tracing diagram of fig. 7.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

In the prior art, the lamp needs to be ultra-thin, and the common implementation mode is as follows: the LED light guide device is realized by densely arranging a large number of LEDs or by matching the side sticking of the LEDs with the light guide element. The technical scheme has the potential safety hazard when the lamp is assembled, or the requirement on the assembly position of the light source assembly and the light guide element in the lamp is high, so that the complicated procedures during assembly are increased. The utility model provides a light guide element 40, wherein the light guide element 40 is used for guiding light rays emitted by a light source, so that the ultrathin design of a lamp can be realized, the safety is high during assembly, and the installation steps are simple.

Specifically, the light guide element 40 is provided with an incident portion 41 and a light guide portion 42, the light source is disposed below the incident portion 41, one side of the incident portion 41 close to the light source is recessed to form an incident surface a and an incident cavity B, and the light source is specifically accommodated in the incident cavity B, so that the light emitted by the light source can rapidly and smoothly reach the incident surface a. The light guide portion 42 is disposed at two sides of the light incident portion 41 and connected to the light incident surface a, so that the light emitted from the light source enters the light guide portion 42 through the light incident surface a, propagates inside the light guide portion 42, and finally exits through the light exiting surface. The creepage distance is increased. It should be noted that: in the present application, the light guide element 40 is disposed in a circular shape, the light incident portion 41 is formed in a ring shape on the light guide element 40, and the light guide portions 42 are disposed inside and outside the light incident portion 41, that is, the light incident portion 41 divides the light guide portion 42 into two parts, so that the light guide portions 42 are disposed on both sides of the light incident portion 41 as viewed in a cross-sectional view of the light guide element 40; of course, in other embodiments, the light guide element 40 may be disposed in a flat plate shape or a strip shape, as long as the positional relationship that the light incident portion is located between the two light guide portions is satisfied, and the present invention is not limited thereto.

In addition, in order to better apply the light guide element 40 to achieve the ultra-thin of the lamp and reduce the fraction defective of the assembled lamp, the present invention further provides a lamp, which includes a lamp body 10, a light source assembly 20, a light guide element 40 and a cover 50, which are assembled with each other. For clarity, the following description will take the lamp as the down lamp 100 as an example, and of course, the light guide element 40 may also be applied to other lamps (such as a ceiling lamp), which is not limited herein.

As shown in fig. 1 and 2, the present invention discloses a downlight 100, which includes a lamp body 10, a light source assembly 20, a light guide element 40 and a face mask 50, which are sequentially assembled with each other. Down lamp 100's lamp body 10, light source subassembly 20, light guide element 40 and face guard 50 all are circular setting, the bottom of lamp body 10 is concave inwards to form lamp chamber 11, so that whole lamp body 10 is the setting of bowl form, the bottom in lamp chamber 11 is fixed to light source subassembly 20, light guide element 40 is fixed with the equipment of lamp body 10, in order spacing lamp chamber 11 with light source subassembly 20, face guard 50 covers in light guide element 40's the outside and with lamp body 10 fixed connection, in order to seal lamp chamber 11.

Specifically, referring to fig. 1, 2 and 3, a positioning portion 46 protrudes from an edge of the light guide element 40, and the inner sidewall of the lamp body 10 is provided with a matching portion 12 matching with the positioning portion 46. Preferably, the positioning portion 46 is a latch 46 protruding outward from the edge of the light guide element 40, the engaging portion 12 is a slot 12 formed on the inner sidewall of the lamp body 10, and the latch 46 is received in the slot 12 to fix the light guide element 40 in the lamp body 10. Preferably, the card slot 12 in this embodiment is a triangular groove formed by three surfaces, that is, the card slot 12 on the lamp body 10 is equivalent to a guide groove of the buckle 46, so that when the light guide element 40 is assembled and fixed with the lamp body 10, the light guide element 40 can slide into the card slot 12 of the lamp body 10 by the buckle 46, the assembly is simple, the positioning is more accurate, and the light source assembly 20 cannot be damaged, in other words, the light guide element 40 can be fixed in the lamp body 10 by the buckle 46 and the card slot 12.

Of course, the positioning portion 46 may also be a slot formed at the edge of the light guide element 40, and at this time, the matching portion 12 is a buckle protruding from the inner sidewall of the lamp body 10, so that the light guide element 40 and the lamp body 10 can be assembled and fixed; alternatively, the engaging portion 12 on the inner sidewall of the lamp body 10 may have other structures, and the positioning portion 46 may have other structures, as long as the purpose of assembling and fixing the light guide element 40 and the lamp body 10 by the mutual engagement of the positioning portion 46 and the engaging portion 12 can be satisfied, which is not limited herein.

In addition, a protection edge 13 arranged in a circular ring shape protrudes from the edge of the lamp body 10, the inner diameter of the protection edge 13 is larger than the outer diameter of the face mask 50, and when the face mask 50 is placed in the lamp body 10, the outer surface of the face mask 50 and the outer surface of the protection edge 13 are on the same horizontal plane. Due to the above structure design (i.e. the combination of the protective edge 13 and the bowl-shaped lamp body 10), not only the light source assembly 20, the light guide element 40 and the face mask 50 are all accommodated in the lamp body 10, but also the internal structure of the lamp body 10 is effectively protected, and the whole lamp is lighter and thinner.

As shown in fig. 4, the light source assembly 20 includes a light source board 21 and beads 30 fixed on the light source board 21, and one surface of the light source board 21 near the light guide element 40 is sprayed with ink to improve the reflectivity of the light source board 21. The lamp beads 30 are LEDs, namely the LEDs 30 are light sources inside the down lamp 100. Specifically, the LED 30 and a cable for energizing the LED 30 are provided on the light source board 21 on the side close to the light guide element 40. During the equipment, directly keep flat the light source subassembly 20 that assembles and fix in lamp body 10, then assemble light guide element 40 and face guard 50 in proper order in the top of light source subassembly 20 again to fix in the lamp chamber 11 of lamp body 10 can, it is to notice: during assembly, it is necessary to ensure that the light incident portion 41 of the light guide element 40 is positioned above the LED 30.

The mask 50 is used for light evening, preferably, in the utility model, the purpose of light evening or light mixing is achieved by adding a diffusant, the primary transmittance can reach 60-70%, and the diffusant can be made of PC, PMMA, PP or PS and the like. With this arrangement, compared with the prior art, the direct type arrangement of LEDs is adopted to match with the side light emitting manner of the light guide element 40, so that the width of the light source board 21 is not limited by positioning, and the creepage distance of the LEDs 30 is increased.

Further, in the present invention, the light source plate 21 is disposed in a circular ring shape, the plurality of LEDs 30 are uniformly distributed in a ring shape and fixed on the light source plate 21, and each LED is located at the center position below the light incident cavity B. Set up like this, not only can practice thrift the material of light source board 21, make whole lamp weight alleviate, but also can reduce the quantity of lamp pearl 30 under the condition of guaranteeing the light-emitting rate, effectively improved circuit design's security.

As shown in fig. 5, 6 and 7, the light guide element 40 is made of a transparent optical material, preferably, the transparent optical material is transparent PC, transparent PMMA, transparent PS, or the like. The light guide element 40 includes a light incident portion 41 and a light guide portion 42, and the light guide portion 42 is disposed at both sides of the light incident portion 41 and connected to the light incident surface a, so that the light emitted from the LED 30 enters the light guide portion 42 through the light incident surface a and propagates inside the light guide portion 42. Specifically, the side of the light incident portion 41 close to the LEDs 30 is recessed upward to form the light incident surface a, that is, the side of the light incident portion 41 close to the light source plate 21 is recessed toward the direction away from the light source plate 21 to form the light incident surface a and the light incident cavity B, and the opening direction of the light incident cavity B is toward the light source plate 21. The light incident portion 41 is disposed in a circular ring shape at a central position of the light guide element 40 and is concentric with the entire light guide element 40. The light source assembly 20 is placed below the light guide member 40, and the LEDs 30 fixed on the light source board 21 are placed below the opening of the light-entering cavity B. By the arrangement, the creepage distance of the LED 30 is increased, and the light emitting rate of the whole lamp is effectively improved.

The light incident surface a includes a first incident surface 410 and a second incident surface 411, and it is understood that the first incident surface 410 and the second incident surface 411 are both disposed in a ring shape, and a distance r1 from the first incident surface 410 to a center of the light guide element 40 is greater than a distance r2 from the second incident surface 411 to the center of the light guide element 40. The difference in the distance between r1 and r2 ranges from 4.5mm to 5mm, that is, the diameter of the opening of the light-entering cavity B ranges from 4.5mm to 5 mm. Preferably, the opening of the light-entering cavity B has a diameter of 4.5mm, and the LED 30 is disposed at a central position below the opening of the light-entering cavity B.

The light incident portion 41 divides the light guide portion 42 of the light guide element 40 into a first light guide portion 420 and a second light guide portion 421. The first light guide part 420 is connected to the first incident surface 410, the second light guide part 421 is connected to the second incident surface 411, and the thickness of the first light guide part 420 and/or the thickness of the second light guide part 421 are/is gradually reduced in a direction away from the light incident part 41. That is, the second light guide part 421 is located at the center of the entire light guide element 40 and close to the second incident surface 411, the light incident part 41 surrounds the second light guide part 421, the first light guide part 420 surrounds the light incident part 41 and close to the first incident surface 410, and the first light guide part 420, the light incident part 41, and the second light guide part 421 are all concentrically disposed. The thickness of the light guide element 40 is 0.6mm-4mm, that is, the thickness of the thickest region of the light guide element 40 is 4mm, the thickness of the thinnest region is 0.6mm, and the thickness of the first light guide part 420 becomes thinner as it is farther from the first incident surface 410.

The first light guide part 420 includes a first light guide surface 422 disposed near one side of the LED 30 and a second light guide surface 423 disposed opposite to the first light guide surface 422, the second light guide surface 423 is parallel to a horizontal plane, and the first light guide surface 422 gradually inclines upward from the first incident surface 410 toward a direction away from the first incident surface 410.

Specifically, the first light guide surface 422 uniformly approaches the second light guide surface 423 to form an inclined surface with a larger gradient, so that the thickness of the first light guide portion 420 becomes uniformly thinner as the first light guide portion is farther from the first incident surface 410, and the whole light guide portion 42 is substantially in a trapezoidal cylindrical shape with a wide top and a narrow bottom. Similarly, the thickness of second light guide portion 421 becomes thinner as it is farther from second incident surface 411, that is, the thickness of second light guide portion 421 is the thinnest at the central position, so that when the light emitted from LED 30 enters first light guide portion 420 from first incident surface 410 and propagates and reflects several times, first light guide portion 420 can destroy the total reflection occurring in light guide portion 42 by its own thickness change to thinnest.

It should be noted that, since the light incident portion 41 is annularly disposed, when light emitted by the LED 30 enters the corresponding first light guide portion 420 and/or second light guide portion 421 from the first incident surface 410 and/or second incident surface 411, light rays propagate more in the second light guide portion 421 than in the first light guide portion 420, and therefore, in the present invention, the inclination of the light guide surface at the bottom of the second light guide portion 421 is smaller than that of the light guide surface (the first light guide surface 422) at the bottom of the first light guide portion 420.

Further, the first incident surface 410 and the second incident surface 411 of the light incident portion 41 are both curved surfaces, and the curved surfaces protrude toward one side of the LED 30, so that light emitted by the LED 30 enters the corresponding first light guide portion 420 and the second light guide portion 421 through the first incident surface 410 and the second incident surface 411. By the arrangement, the light-emitting rate can be ensured, materials can be saved, and the safety of circuit design and the reliability of the whole lamp can be improved under the condition of using a small amount of LEDs 30.

With reference to fig. 4, 5 and 6, the step-shaped microstructures 426 are disposed on the light emergent surface of the first light guiding portion 420, the microstructures 426 are disposed around the light incident portion 41, and the microstructures 426 are also disposed in a ring shape and converge toward the center of the light guiding element 40. Set up like this, after light got into first light guide part 420, can carry out a series of light reflection, refraction, in order to avoid appearing the phenomenon of total reflection, can rely on the thickness change of first light guide part 420 itself to destroy the total reflection, can also utilize micro-structure 426 on the first light guide part 420 to destroy the total reflection and carry out the light-emitting, so set up, effectively improved the light-emitting rate of whole down lamp 100, and the light of light-emitting is more soft, natural. Of course, in other embodiments, the light-guiding particles or other light-destroying structures may also be used to destroy the total reflection to emit light, and this is not limited herein.

Further, in order to improve the light-emitting efficiency of the entire lamp, a concave portion 43 is further disposed on the light-emitting surface of the light guiding element 40, the concave portion 43 is located above the light-entering portion 41 and is opposite to the light-entering portion 41 in the same vertical direction, and the concave portion 43 divides the light-emitting surface of the light guiding portion 42 into a first light-emitting surface 424 and a second light-emitting surface 425, that is, the first light-emitting surface 424 is the light-emitting surface of the first light guiding portion 420, and the second light-emitting surface 425 is the light-emitting surface of the second light guiding portion 421. The first light emitting surface 424 is located outside the second light guiding surface 423, that is, the first light emitting surface 424 is a top outer wall surface of the first light guiding portion 420, and the second light guiding surface 423 is a top inner wall surface of the first light guiding portion 420, which are disposed opposite to each other.

The second light emitting surface 425 is a top outer wall surface of the second light guiding portion 421, is located in the center of the light guiding element 40, and is disposed in a circular shape, and the first light emitting surface 424 surrounds the second light emitting surface 425 and is disposed in a circular ring shape, so that after light enters from the first incident surface 410 and the second incident surface 411 respectively, the light is finally emitted from the first light emitting surface 424 and the second light emitting surface 425 respectively through a series of reflection and refraction. Since the second light emitting surface 425 is located at the center of the light guiding element 40 and the light emitted from the first light emitting surface 424 is relatively concentrated, the second light emitting surface 425 is disposed slightly lower than the first light emitting surface 424 in the vertical direction, that is, the maximum thickness of the second light guiding portion 421 near the light incident portion 41 is slightly smaller than the maximum thickness of the first light guiding portion 420 near the light incident portion 41, the light incident portion 41 is located between the first light guiding portion 420 and the second light guiding portion 421, and the thickness of the light incident portion 41 is smaller in the middle and larger in the two sides. By the arrangement, the light-emitting rate of the whole lamp can be improved, and the nature and softness of light rays are also ensured.

The assembly and operation of the downlight 100 of the present invention will now be described with reference to figures 1 to 8. Firstly, fixing a plurality of LEDs 30 on a light source plate 21 in a circular ring shape to form a light source assembly 20, and fixing the light source assembly 20 to the bottom center of the lamp body 10; then, sliding the light guide element 40 into the lamp body 10, and fixing the buckle 46 in the slot 12 on the inner sidewall of the lamp body 10, while ensuring that the LED 30 on the light source board 21 is located at the center position below the opening of the light incident portion 41 of the light guide element 40; finally, the cover 50 is fixed into the lamp body 10 such that the outer surface of the cover 50 is located at the same level as the protective edge 13 of the lamp body 10, and the assembly of the downlight 100 is completed. Preferably, the height of the cavity of the downlight 100 of the present invention, that is, the height between the upper surface (the surface close to the light guide element 40) of the light source plate 21 and the inner surface (the surface close to the light guide element 40) of the cover 50 is about 8mm, and such a height setting, in combination with the structural setting of the light guide element 40, can better ensure that the light-emitting efficiency of the LED 30 is high and the light is soft.

The working principle is as follows: light emitted by the LED 30 enters the corresponding first light guide part 420 and second light guide part 421 from the first incident surface 410 and the second incident surface 411, a part of the light is reflected in the first light guide part 420 and the second light guide part 421, a small part of the light is refracted out of the light guide part 42 from the bottom surfaces of the first light guide part 420 and the second light guide part 421, a part of the light is refracted out from the light exit surfaces of the first light guide part 420 and the second light guide part 421, and the light refracted out from the light exit surface passes through the mask 50, so that the light guide part finally presents high light rate, soft and natural light.

In summary, the light guide element 40 of the present invention effectively increases the creepage distance of the light source 30 and also effectively improves the light emitting efficiency of the light source 30 by the light incident surface a which is formed by being concave and is arranged in a curved surface; the lamp 100 of the present invention uses the direct-type arrangement of the light guide element 40 and the light source assembly 20, and the concave light inlet portion 41 on the light guide element 40 is matched to enable the light guide element 40 to realize side light emission, so that not only the ultra-thin shape of the lamp 100 is realized, but also the light emitting rate of the whole lamp and the natural softness of light rays are improved.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims (13)

1. A light guide element for guiding light from a light source, comprising: the light guide element is provided with a light incoming part and a light guide part, the light source is placed below the light incoming part, one side of the light incoming part, which is close to the light source, is sunken to form a light incoming surface, and the light incoming surface is a curved surface; the light guide part is arranged beside the light inlet part and connected with the light inlet surface, so that light rays emitted by the light source enter the light guide part after passing through the light inlet surface and are transmitted inside the light guide part, and the light rays in the light guide part are emitted out through the light outlet surface in a transmission way.

2. A light guide element as recited in claim 1, wherein: the light incident surface comprises a first incident surface and a second incident surface, the light guide part comprises a first light guide part and a second light guide part, the first light guide part and the second light guide part are located on two sides of the light incident portion, the first light guide part is connected with the first incident surface, the second light guide part is connected with the second incident surface, and the thickness of the first light guide part and/or the thickness of the second light guide part are/is gradually reduced along the direction far away from the light incident portion.

3. A light directing element according to claim 2, wherein: the maximum thickness of the second light guide part close to the light incident part is smaller than that of the first light guide part close to the light incident part; the light incident part is located between the first light guide part and the second light guide part, and the thickness of the light incident part is small in the middle and large in two sides.

4. A light guide element as recited in claim 3, wherein: the thicknesses of the first light guide part and the second light guide part are both 0.6mm-4 mm.

5. A light directing element according to claim 2, wherein: the first light guide part comprises a first light guide surface and a second light guide surface, the first light guide surface is arranged on one side close to the light source, the second light guide surface is arranged opposite to the first light guide surface, the second light guide surface is parallel to the horizontal plane, and the first light guide surface gradually inclines upwards from the first incident surface to the direction far away from the first incident surface.

6. A light directing element according to claim 2, wherein: the light guide element is annularly arranged, the light inlet part surrounds the second light guide part, the first light guide part surrounds the light inlet part, and the light outlet surface of the first light guide part is provided with a light destruction structure so as to destroy the total reflection of the light in the first light guide part.

7. A light-directing element as recited in claim 6, wherein: the photo-destructive structure is a stepped microstructure.

8. A light directing element according to claim 2, wherein: the curved surface of the first incidence surface and/or the second incidence surface protrudes towards one side of the light source.

9. The utility model provides a lamp, includes equipment complex lamp body, light source subassembly, leaded light component and face guard each other, be formed with the lamp chamber in the lamp body, the light source subassembly is fixed in the lamp chamber, its characterized in that: the light guide element according to any one of claims 1 to 8.

10. The luminaire of claim 9, wherein: a positioning part is extended from the edge of the light guide element, and a matching part matched with the positioning part is arranged on the inner side wall of the lamp body; the light guide element is fixed in the lamp cavity through the mutual matching of the positioning part and the matching part.

11. The luminaire of claim 10, wherein: the positioning part is a buckle which protrudes outwards from the edge of the light guide element, the matching part is a clamping groove which is concavely arranged on the inner side wall of the lamp body, and the buckle is contained in the clamping groove so as to fix the light guide element in the lamp body.

12. The luminaire of claim 9, wherein: the light source subassembly includes the light source board and fixes lamp pearl on the light source board, the light source board is close to the oil ink is spouted to the one side of leaded light component, lamp pearl evenly distributed is in on the light source board and be located the central point of leaded light component's income light portion below puts the department.

13. The luminaire of claim 9, wherein: the lamp is a down lamp, the lamp body, the light source component, the light guide element and the face mask are all arranged in a circular shape, and the face mask covers the outer side of the light guide element and is fixedly connected with the lamp body to seal the lamp cavity.

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