CN208295823U - Lens and lamps and lanterns for lamps and lanterns - Google Patents

Abstract

The utility model discloses a kind of lens and lamps and lanterns for lamps and lanterns, lens include lens body, lens body is in bar shaped, the outer surface of lens body includes the plane of incidence, first reflecting surface, second reflecting surface and light-emitting surface, the plane of incidence is oppositely arranged with light-emitting surface, and the plane of incidence limits accommodating chamber and is suitable for accommodating the light source of lamps and lanterns, first reflecting surface and the second reflecting surface are respectively provided at the two sides of the plane of incidence, the both ends of first reflecting surface are connected with the plane of incidence and light-emitting surface respectively, the both ends of second reflecting surface are connected with the plane of incidence and light-emitting surface respectively, first reflecting surface includes the multiple sub- reflectings surface being connected with each other, multiple sub- reflectings surface are set gradually along the direction of the plane of incidence to light-emitting surface, curvature mutation of the two neighboring sub- reflecting surface at corresponding intersection.There is biggish angle of cut-off to promote the uniform illumination degree of entire illuminated area convenient for meeting the lighting requirement of lamps and lanterns, while realizing fool-proof design for lens according to the present utility model for lamps and lanterns.

Description

Lens for lamp and lamp

Technical Field

The utility model belongs to the technical field of the lighting technology and specifically relates to a lens and lamps and lanterns for lamps and lanterns are related to.

Background

In classroom illumination, the blackboard is a writing display area for teachers to give lessons and is a key illumination area, and good illumination and uniformity play a vital role in concentrating the attention of students and relieving visual fatigue. In lighting and lighting sanitary standards GB7793-2010 of teachers in middle and primary schools, students are required to have the average illumination of writing working surfaces of the students larger than 300lx and the uniformity larger than 0.7, and the requirements of the average illumination of a blackboard larger than 500lx and the uniformity larger than 0.8 on the illumination and the uniformity of the blackboard are higher than those of the writing working surfaces, so that the significance degree of blackboard lighting in classroom lighting can be sufficiently described.

In the correlation technique, blackboard lamps in classrooms mostly fail to meet the requirements, and most of the blackboard lamps adopt a structure that a lamp tube is arranged under a lamp shade, so that the lamp tube still keeps the occupancy of more than 80%, the light of the blackboard lamps basically irradiates downwards vertically, the illumination and the uniformity on the blackboard can not meet the standard requirements, students can learn under the conditions of low illumination and low uniformity for a long time to cause visual fatigue, the teaching quality is influenced, and finally, the eyesight and the achievement of the students are reduced. Especially, the blackboard lamp can not illuminate the part above the blackboard, which is close to the blackboard lamp, so that an illumination dark space exists above the blackboard.

Similarly, the wall washer lamp is installed at the bottom of the wall to project upwards so as to illuminate the wall surface, so that the light distribution of the wall surface is uniform, the illumination height is pursued as much as possible, and the ideal effects are uniform light spots, high illumination intensity and large illumination area. However, in the related art, the wall washer lamp cannot achieve an ideal effect, the illumination of the wall bottom and the low-height area close to the wall washer lamp is insufficient or has a light reverse fork, and the light spot higher than the wall has an obvious illumination difference, so that a lighting dark area is formed at the bottom.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a lens for lamps and lanterns, lens have great cut-off angle, are convenient for satisfy the lighting requirements of lamps and lanterns, have promoted the illumination degree of consistency of whole illumination face, have realized preventing slow-witted design simultaneously.

The utility model discloses still provide a lamps and lanterns that have above-mentioned lens.

According to the utility model discloses a lens for lamps and lanterns of first aspect embodiment includes: the lens body is strip-shaped, the outer surface of the lens body comprises an incident surface, a first reflecting surface, a second reflecting surface and a light-emitting surface, the incident surface and the light-emitting surface are arranged oppositely, the incident surface is recessed towards the light-emitting surface to define a containing cavity, the containing cavity is suitable for containing a light source of the lamp, the first reflecting surface and the second reflecting surface are respectively arranged at two sides of the incident surface, two ends of the first reflecting surface are respectively connected with the incident surface and the light-emitting surface, two ends of the second reflecting surface are respectively connected with the incident surface and the light-emitting surface, the first reflecting surface comprises a plurality of sub reflecting surfaces which are connected with each other, the plurality of sub reflecting surfaces are sequentially arranged along the direction from the incident surface to the light-emitting surface, and the curvature of two adjacent sub reflecting surfaces at the corresponding intersection line is suddenly changed, the both ends of lens body are equipped with first installation department and second installation department respectively, first installation department is established first plane of reflection with between the play plain noodles, the second installation department is established the second plane of reflection with between the play plain noodles, first installation department with the second installation department is about the central longitudinal section of lens body is asymmetric.

According to the lens for the lamp, the first reflecting surface of the lens body is set to comprise the plurality of sub reflecting surfaces, and the curvature of the two adjacent sub reflecting surfaces at the corresponding intersection line is suddenly changed, so that the cut-off angle of the lens is increased; when the lens is applied to a lamp, illumination supplement can be performed on an illumination area of the illumination surface, which is close to the lamp, so that an illumination dark area is prevented from being formed in the area of the illumination surface, which is close to the lamp, so that the illumination uniformity of the whole illumination surface is improved, a good illumination effect of the lamp is ensured, and the illumination requirement of the lamp is met; through setting up first installation department and second installation department to make first installation department and second installation department be asymmetric about central longitudinal section, guaranteed the relative position precision between lens and the light source, realized the fool-proofing design of lens.

According to some embodiments of the invention, the second reflective surface is G1 continuous.

According to some embodiments of the invention, each of the sub-reflecting surfaces is G2 continuous.

According to the utility model discloses a some embodiments, sub-plane of reflection is two, two sub-plane of reflection is first sub-plane of reflection and the sub-plane of reflection of second respectively, first sub-plane of reflection is close to the incident surface sets up, the sub-plane of reflection of second is close to go out the plain noodles setting on the cross section of lens body the curvature of the projection of first sub-plane of reflection is greater than the curvature of the projection of the sub-plane of reflection of second.

According to some embodiments of the invention, the surface area of the first sub-reflecting surface is larger than the surface area of the second sub-reflecting surface.

According to some embodiments of the present invention, the incident surface includes first incident surface, second incident surface and third incident surface, the third incident surface with go out the relative setting of plain noodles, first incident surface is established the third incident surface with between the first plane of reflection, the second incident surface is established the third incident surface with between the second plane of reflection, the third incident surface forms free curved surface, works as the vertical arrangement of the central longitudinal section of lens body, just it is located to go out the plain noodles when the top of third incident surface, the neighbouring of third incident surface the one end of first plane of reflection is located the neighbouring of third incident surface the top of the one end of second plane of reflection.

According to some embodiments of the present invention, the first incident surface and the second incident surface are formed as draft surfaces, and a draft angle of the first incident surface is different from a draft angle of the second incident surface.

According to some embodiments of the present invention, the light emitting surface is formed as a plane or an optical microstructure array curved surface.

According to some embodiments of the invention, when the light exit face is formed as a plane, the light exit face is perpendicular to a central longitudinal section of the lens body; or, the light emitting surface extends obliquely relative to the central longitudinal section towards the direction from the first reflecting surface to the second reflecting surface and away from the incident surface.

According to some embodiments of the invention, the first installation portion and the second installation portion are both inclined relative to the central longitudinal section.

According to the utility model discloses lamps and lanterns of second aspect embodiment, include according to the utility model discloses the lens for lamps and lanterns of above-mentioned first aspect embodiment.

According to the utility model discloses lamps and lanterns through adopting foretell lens, have satisfied the lighting needs of lamps and lanterns, avoid forming the illumination dark space on the illumination face, have promoted the illumination degree of consistency of whole illumination face.

According to some embodiments of the utility model, lamps and lanterns are for washing pinup, or blackboard lamp.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a lens according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the lens body shown in FIG. 1;

FIG. 3 is a schematic view of the lens of FIG. 1 in cooperation with a light source, wherein the dotted lines indicate the direction of travel of the various light rays;

FIG. 4 is a schematic view of the lens of FIG. 1 in cooperation with a light source and an illumination surface, wherein the dotted lines indicate the propagation directions of various light rays;

fig. 5 is a schematic view of a lamp fitting and an illuminating surface according to an embodiment of the present invention;

fig. 6 is a schematic view of a lamp fitting and an illuminating surface according to another embodiment of the present invention;

fig. 7 is a light distribution graph in polar coordinate representation of a luminaire according to an embodiment of the present invention;

fig. 8 is a light distribution curve graph expressed by rectangular coordinates of a lamp according to an embodiment of the present invention.

Reference numerals:

a lamp 200,

Lens 100, illumination surface 101, light source 102,

A lens body 1, a central longitudinal section 10a,

Incident surface 11, accommodating chamber 11a, first incident surface 111, second incident surface 112, third incident surface 113,

A first reflection surface 12, an intersection 120, a first sub reflection surface 121, a second sub reflection surface 122,

A second reflection surface 13, a light-emitting surface 14,

A first mounting portion 21 and a second mounting portion 22.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

A lens 100 for a luminaire 200 according to an embodiment of the present invention is described below with reference to fig. 1-6. The lamp 200 may be a wall washer lamp or a blackboard lamp. In the following description of the present application, the lens 100 is used for wall washer lamps and blackboard lamps as an example. Of course, those skilled in the art will appreciate that the lens 100 may also be used with other types of light fixtures 200, without limitation.

As shown in fig. 1 to 6, a lens 100 for a lamp 200 according to an embodiment of the present invention includes a lens body 1.

The lens body 1 is in a strip shape, the outer surface of the lens body 1 includes an incident surface 11, a first reflecting surface 12, a second reflecting surface 13 and a light-emitting surface 14, the incident surface 11 and the light-emitting surface 14 are arranged opposite to each other, the incident surface 11 is recessed towards the light-emitting surface 14 to define a containing cavity 11a, the containing cavity 11a is suitable for containing the light source 102 of the lamp 200, the first reflecting surface 12 and the second reflecting surface 13 are respectively arranged at two sides of the incident surface 11, two ends of the first reflecting surface 12 are respectively connected with the incident surface 11 and the light-emitting surface 14, two ends of the second reflecting surface 13 are respectively connected with the incident surface 11 and the light-emitting surface 14, the first reflecting surface 12 includes a plurality of sub-reflecting surfaces connected with each other, the plurality of sub-reflecting surfaces are sequentially arranged along the direction from the incident surface 11 to the light-emitting surface 14, and the curvatures of two adjacent sub.

For example, as shown in fig. 1 to 4, the lens body 1 may have a long bar shape, and the lens body 1 may extend along a straight line, and the length of the lens body 1 may be specifically set according to the practical application. The incident surface 11 and the light emitting surface 14 may be disposed opposite to each other in an up-down direction (e.g., in the up-down direction in fig. 2), a side of the accommodating cavity 11a away from the light emitting surface 14 is opened to accommodate the light source 102, and the light source 102 may be an LED lamp bead, but is not limited thereto; when the light source 102 is an LED lamp bead, the LED lamp beads may be multiple, the multiple LED lamp beads may be all located in the accommodating cavity 11a, and the multiple LED lamp beads may be sequentially arranged along the axial direction (length direction) of the lens body 1.

The first reflection surface 12 and the second reflection surface 13 may be respectively disposed on both left and right sides (e.g., left and right directions in fig. 2) of the incident surface 11, one end of the first reflection surface 12 is connected to the incident surface 11, the other end of the first reflection surface 12 is connected to the light-emitting surface 14, one end of the second reflection surface 13 is connected to the incident surface 11, the other end of the second reflection surface 13 is connected to the light-emitting surface 14, and the first reflection surface 12 and the second reflection surface 13 extend in a direction from the incident surface 11 to the light-emitting surface 14, and the first reflection surface 12 and the second reflection surface 13 face away from each other; the first reflecting surface 12 includes a plurality of sub-reflecting surfaces, each sub-reflecting surface extends along the axial direction of the lens body 1, the plurality of sub-reflecting surfaces are sequentially arranged along the direction from the incident surface 11 to the light emitting surface 14, and the curvatures of two adjacent sub-reflecting surfaces at the corresponding intersection line 120 are abrupt, that is, the curvature of one of the two adjacent sub-reflecting surfaces at the intersection line 120 is not equal to the curvature of the other of the two adjacent sub-reflecting surfaces at the intersection line 120, for example, the curvatures of the plurality of sub-reflecting surfaces decrease along the direction from the incident surface 11 to the light emitting surface 14, that is, the entire first reflecting surface 12 is only G0 continuous, and each sub-reflecting surface may be G1 continuous.

When the lens 100 is applied to the luminaire 200, the luminaire 200 may be disposed on one side of the illumination surface 101, for example, the second reflection surface 13 may be disposed adjacent to the illumination surface 101, and the first reflection surface 12 may be disposed away from the illumination surface 101; the light of the light source 102 is refracted by the incident surface 11 and then emitted into the lens body 1, wherein a part of the light is emitted onto the plurality of sub-reflecting surfaces and reflected into the lens body 1 by the plurality of sub-reflecting surfaces, and then the light can be emitted from the light emitting surface 14, and finally the light is irradiated onto the illumination surface 101 of the lamp 200, such as a blackboard surface or a wall surface. After being reflected by the sub-reflecting surface close to the incident surface 11, an included angle between the direction of the light emitted from the light emitting surface 14 and the central longitudinal section 10a of the lens body 1 is smaller, and the light finally irradiates an area of the illumination surface 101 far away from the lamp 200; after being reflected by the sub-reflecting surface close to the light-emitting surface 14, the included angle between the direction of the light emitted from the light-emitting surface 14 and the central longitudinal section 10a of the lens body 1 is relatively large, and the light finally irradiates the area of the lighting surface 101, which is closer to the lamp 200, so that the cut-off angle of the lens 100 is increased. Therefore, on the premise of ensuring a small beam angle of the emergent light of the lamp 200, the illumination supplement is performed on the area of the illuminating surface 101 close to the lamp 200, so that the area of the illuminating surface 101 close to the lamp 200 has no obvious illumination difference with other areas, an illumination dark area is prevented from being formed in the area of the illuminating surface 101 close to the lamp 200, and the illumination uniformity of the whole illuminating surface 101 is improved.

Here, it should be noted that the "reflection surface" should be understood broadly, and may include a total reflection surface, that is, a light ray refracted by the incident surface 11 and incident on the surface is still totally reflected into the lens body 1, and may also include a non-total reflection surface, that is, a part of a light ray refracted by the incident surface 11 and incident on the surface is reflected into the lens body 1, and another part is refracted into the environment outside the lens body 1, for example, air, and in this case, reflection is mainly performed, that is, when the reflection surface is a non-total reflection surface, most of the light ray arranged on the surface is reflected into the lens body 1, and a small part of the light ray is refracted. The "cut-off angle of the lens 100" may refer to an angle formed by a light ray having an intensity of 0cd as a boundary of light emitted from the lens 100 on a cross section of the lens body 1, and the light intensity of the light emitted from the lens 100 is greater than 0cd in the cut-off angle range. "plurality" means two or more.

A first mounting portion 21 and a second mounting portion 22 are respectively disposed at two ends (e.g., left and right ends in fig. 2) of the lens body 1, the first mounting portion 21 may be disposed at one end of the lens body 1, the first mounting portion 21 is disposed between the first reflection surface 12 and the light exit surface 14, and the first mounting portion 21 may be disposed to protrude from an outer surface of the lens body 1; the second mounting portion 22 may be disposed at the other end of the lens body 1, the second mounting portion 22 is disposed between the second reflecting surface 13 and the light emitting surface 14, the second mounting portion 22 may be disposed to protrude from the outer surface of the lens body 1, and the first mounting portion 21 and the second mounting portion 22 are asymmetric with respect to the central longitudinal section 10a of the lens body 1. Therefore, by arranging the first mounting part 21 and the second mounting part 22 at the two ends of the lens body 1 respectively, the lens 100 can be conveniently mounted on other parts of the lamp 200, such as a shell, through the first mounting part 21 and the second mounting part 22, so that the lamp 200 can be conveniently assembled, and meanwhile, the relative position between the lens 100 and the light source 102 is ensured to be within the design tolerance range; by setting the first mounting portion 21 and the second mounting portion 22 to be asymmetrical with respect to the central longitudinal section 10a of the lens body 1, the fool-proof design of the lens 100 is achieved, so that an operator can directly and infallibly complete corresponding correct operation without spending much attention, experience, professional knowledge, and the like, and the operation and use of the lens 100 are facilitated.

Here, it should be noted that "the relative position between the lens 100 and the light source 102 is within the design tolerance" may mean that the light source 102 has its ideal installation position during the design process of the lens 100, and there is an error between the actual installation position of the light source 102 and its ideal installation position during the actual application process of the lens 100, and the error is within the design tolerance. The ideal installation position of the light source 102 may be any position in the accommodating cavity 11a, and may be specifically set according to design requirements.

According to the lens 100 for the lamp 200 of the embodiment of the present invention, the first reflective surface 12 of the lens body 1 is configured to include a plurality of sub-reflective surfaces, and the curvature of two adjacent sub-reflective surfaces at the corresponding intersection line 120 changes abruptly, so that the cut-off angle of the lens 100 is increased; when the lens 100 is applied to the lamp 200, illumination compensation can be performed on an illumination area of the illumination surface 101, which is closer to the lamp 200, so that an illumination dark area is prevented from being formed in the area of the illumination surface 101, which is closer to the lamp 200, thereby improving illumination uniformity of the whole illumination surface 101, ensuring good illumination effect of the lamp 200, and meeting illumination requirements of the lamp 200; by providing the first mounting portion 21 and the second mounting portion 22 and making the first mounting portion 21 and the second mounting portion 22 asymmetrical with respect to the central longitudinal section 10a, the relative positional accuracy between the lens 100 and the light source 102 is ensured, and the foolproof design of the lens 100 is realized.

In some embodiments of the present invention, the second reflective surface 13 is G1 continuous, thereby facilitating the processing of the second reflective surface 13. Of course, the second reflective surface 13 may be continuous in G2, or continuous in G3, or continuous in higher order.

Specifically, as shown in fig. 1-4, the second reflective surface 13 may be formed as a curved surface, light from the light source 102 is refracted by the incident surface 11 and then enters the lens body 1, a portion of the light enters the second reflective surface 13 and is reflected by the second reflective surface 13 into the lens body 1, and then the light can exit from the light exit surface 14, and an included angle between a direction of the light exiting from the light exit surface 14 and the central longitudinal section 10a of the lens body 1 is smaller, and finally the light is irradiated on the illumination surface 101 in a region farther from the lamp 200, so as to further ensure a cut-off angle of the lens 100 and ensure an illumination effect of the lamp 200.

It will be appreciated that the second reflecting surface 13 may be provided in other shapes according to actual requirements. For example, the second reflecting surface 13 may be arranged symmetrically with the first reflecting surface 12 about the central longitudinal section 10a of the lens body 1, and the entire second reflecting surface 13 is only G0 continuous, but is not limited thereto.

In some optional embodiments of the present invention, each of the sub-reflecting surfaces is G2 continuous, so as to facilitate the formation of the sub-reflecting surfaces. Of course, each sub-reflecting surface may also be G3 continuous, or higher order continuous. It is understood that the continuity of the plurality of sub-reflecting surfaces may be the same or different.

In some embodiments of the present invention, as shown in fig. 1-4, two sub-reflecting surfaces are provided, the two sub-reflecting surfaces are a first sub-reflecting surface 121 and a second sub-reflecting surface 122, the first sub-reflecting surface 121 is disposed adjacent to the incident surface 11, the second sub-reflecting surface 122 is disposed adjacent to the light-emitting surface 14, the curvature of the projection of the first sub-reflecting surface 121 on the cross section of the lens body 1 is greater than the curvature of the projection of the second sub-reflecting surface 122, so as to ensure that the included angle between the direction of the light emitted from the light-emitting surface 14 and the central longitudinal section 10a of the lens body 1 after the light is reflected by the first sub-reflecting surface 121 is smaller, and the light is finally irradiated in the area of the lighting surface 101 farther from the lamp 200, so as to ensure that the included angle between the direction of the light emitted from the light-emitting surface 14 and the central longitudinal section 10a of the lens body 1 after the light is reflected by the second sub-reflecting surface 122, the light is finally irradiated in the area of the lighting surface 101, which is closer to the lamp 200, and meanwhile, the structure of the first reflecting surface 12 is simplified, and the processing of the first reflecting surface 12 is facilitated. The first sub-reflecting surface 121 and the second sub-reflecting surface 122 may both be formed as curved surfaces, and the slope of the projection of the first sub-reflecting surface 121 on the cross section of the lens body 1 may gradually decrease along the direction from the incident surface 11 to the light emitting surface 14; wherein, the slope is a tangent of an angle between the tangent and an abscissa axis, the abscissa axis being a projection of the central longitudinal section 10a of the lens body 1 on the cross section of the lens body 1.

Here, it should be noted that "curved surface" is a relative concept of "plane surface". Of course, the number of the sub-reflecting surfaces may be two or more, and for example, the number of the sub-reflecting surfaces may be three or four.

Optionally, as shown in fig. 1 to 4, the surface area of the first sub-reflecting surface 121 is larger than the surface area of the second sub-reflecting surface 122, when the lens 100 is applied to the lamp 200, light from the light source 102 is refracted by the incident surface 11 and then enters the lens body 1, wherein a part of the light enters the first sub-reflecting surface 121 and the second sub-reflecting surface 122, and after being reflected by the first sub-reflecting surface 121, an included angle between the direction of the light emitted from the light emitting surface 14 and the central longitudinal section 10a of the lens body 1 is smaller, and finally the light is irradiated in a region of the illuminating surface 101 farther from the lamp 200; after being reflected by the second sub-reflecting surface 122, an included angle between the direction of the light emitted from the light emitting surface 14 and the central longitudinal section 10a of the lens body 1 is relatively large, and the light finally irradiates an area of the illumination surface 101, which is closer to the lamp 200. In the practical application process of the lamp 200, the lamp 200 is disposed on one side of the lighting surface 101, and the lamp 200 is disposed on one side of the lighting surface 101, which is close to one end of the lamp 200 and is far away from the other end, so that the area of the lighting surface 101 near the lamp 200 is smaller than the area of the lighting surface 101 far away from the lamp 200, and therefore the required illumination of the area of the lighting surface 101 near the lamp 200 is relatively smaller, which is convenient for the use of the lamp 200, and improves the practicability of the lamp 200.

It is understood that, when the number of the sub-reflecting surfaces is more than two, the surface areas of the plurality of sub-reflecting surfaces may decrease along the direction from the incident surface 11 to the light emitting surface 14.

In some embodiments of the present invention, the incident surface 11 includes a first incident surface 111, a second incident surface 112 and a third incident surface 113, the third incident surface 113 is disposed opposite to the light emitting surface 14, the first incident surface 111 is disposed between the third incident surface 113 and the first reflecting surface 12, the second incident surface 112 is disposed between the third incident surface 113 and the second reflecting surface 13, the third incident surface 113 is formed as a free-form surface, and when the central longitudinal section 10a of the lens body 1 is vertically disposed and the light emitting surface 14 is located above the third incident surface 113, one end of the third incident surface 113 adjacent to the first reflecting surface 12 is located above one end of the third incident surface 113 adjacent to the second reflecting surface 13.

For example, in the example of fig. 1 to 4, the third incident surface 113 and the light emitting surface 14 may be disposed opposite to each other in the up-down direction (e.g., the up-down direction in fig. 2), and the third incident surface 113 is formed as a free curved surface, so that the third incident surface 113 has good design flexibility. One end of the first incident surface 111 may be connected to one end of the third incident surface 113, the other end of the first incident surface 111 may be connected to one end of the first reflecting surface 12, one end of the second incident surface 112 may be connected to the other end of the third incident surface 113, and the other end of the second incident surface 112 may be connected to the second reflecting surface 13. When the central longitudinal section 10a of the lens body 1 is vertically arranged and the light exiting surface 14 is located right above the third incident surface 113, the one end of the third incident surface 113 is located above the other end of the third incident surface 113, the middle of the third incident surface 113 may be protruded toward a direction away from the light emitting surface 14, so that a portion of the third incident surface 113 positioned at one side (for example, the left side in fig. 2) of the central longitudinal section 10a of the lens body 1 is positioned at an upper side of another portion of the third incident surface 113 positioned at the other side (for example, the right side in fig. 2) of the central longitudinal section 10a of the lens body 1, so that the light refracted through the above portion of the third incident surface 113 and incident into the lens body 1 can be transmitted toward the other side of the central longitudinal section 10a of the lens body 1, so as to realize the polarization effect, further ensure the cut-off angle of the lens 100, and ensure the practicability of the lamp 200.

Here, it should be noted that "free-form surface" refers to a curved surface having arbitrary characteristics of conventional machining and molding and which cannot be expressed by one or more polynomials, for example, a free-form surface cannot be expressed by one polynomial, or a free-form surface cannot be expressed by two polynomials, or a free-form surface cannot be expressed by three polynomials, and the like, and has good design flexibility; the term "polarized light" is understood to mean that the light refracted by the lens 100 has a strong light intensity or a large angle in a certain direction, and the light distribution curves are asymmetric on both sides in the optical axis direction, i.e. polarized light.

Further, as shown in fig. 2 and 3, the first incident surface 111 and the second incident surface 112 are each formed as a die-drawing surface, and the first incident surface 111 and the second incident surface 112 may be formed as planes, extending along the direction from the light-emitting surface 14 to the third incident surface 113 and the direction from the first incident surface 111 to the second incident surface 112, the draft angle of the first incident surface 111 is not equal to the draft angle of the second incident surface 112, so that the first incident surface 111 and the second incident surface 112 have good design flexibility, thereby be convenient for further adjust the illumination degree of consistency of illumination face 101, make lens body 1 break away from the mould better simultaneously, avoid lens body 1 in the in-process that breaks away from the mould, the great and fish tail lens body 1 of friction between lens body 1 and the mould, played the effect of protection lens body 1, guarantee lens body 1's machining efficiency. The draft angle of the first incident surface 111 may be an included angle between the first incident surface 111 and the central longitudinal section 10a of the lens body 1, the draft angle of the second incident surface 112 may be an included angle between the second incident surface 112 and the central longitudinal section 10a of the lens body 1, and the draft angles of the first incident surface 111 and the second incident surface 112 may be set according to practical applications, for example, the draft angles of the first incident surface 111 and the second incident surface 112 may both satisfy a range of 1 ° to 3 °.

It is understood that the draft angle of the first incident surface 111 may also be equal to the draft angle of the second incident surface 112, so as to further improve the design flexibility of the first incident surface 111 and the second incident surface 112.

In some optional embodiments of the present invention, as shown in fig. 1 to 3, the light emitting surface 14 is formed as a plane, so as to simplify the structure of the light emitting surface 14, simplify the processing technology of the light emitting surface 14, and facilitate the processing of the lens body 1. The light emitting surface 14 may be perpendicular to the central longitudinal section 10a of the lens body 1, and an included angle between the light emitting surface 14 and the central longitudinal section 10a of the lens body 1 is a right angle; or, an included angle between the light emitting surface 14 and the central longitudinal section 10a of the lens body 1 is an acute angle, and at this time, the light emitting surface 14 may extend obliquely relative to the central longitudinal section 10a along a direction in which the first reflecting surface 12 faces the second direction plane and a direction in which the light emitting surface 14 faces away from the incident surface 11, that is, when the central longitudinal section 10a of the lens body 1 is vertically arranged and the light emitting surface 14 is located above the incident surface 11, one end of the light emitting surface 14 adjacent to the first reflecting surface 12 is located below one end of the light emitting surface 14 adjacent to the second reflecting surface 13, so as to further ensure the polarization effect of the lens 100.

In other optional embodiments of the present invention, the light emitting surface 14 is formed as a curved surface of an optical microstructure array (not shown), each microstructure is a polarizing surface with the same curvature, and forms a desired light intensity distribution for uniform illumination of the illumination surface 101; the curvature of each microstructure surface is gradually transited from large to small, the smaller the curvature is, the slower the change rate is, and the change range of the integral curvature is less than 45 degrees.

Alternatively, the first mounting portion 21 and the second mounting portion 22 each extend obliquely with respect to the central longitudinal section 10 a. For example, as shown in fig. 1 to 4, the first mounting portion 21 and the second mounting portion 22 may be formed in a plate-shaped structure, and the outer surface of the first mounting portion 21 and the outer surface of the second mounting portion 22 may be formed in a plane, and the first mounting portion 21 and the second mounting portion 22 may extend obliquely with respect to the central longitudinal section 10a along the direction from the incident surface 11 to the light-emitting surface 14 and from the first reflecting surface 12 toward the second reflecting surface 13, where an included angle between the first mounting portion 21 and the central longitudinal section 10a may be an acute angle, and an included angle between the second mounting portion 22 and the central longitudinal section 10a may be an acute angle, so that the structures of the first mounting portion 21 and the second mounting portion 22 are simplified, and the processing of the lens 100 is facilitated.

Of course, the first mounting portion 21 and the second mounting portion 22 may also extend obliquely with respect to the central longitudinal section 10a along the direction from the incident surface 11 to the light emitting surface 14, and the direction from the second reflection surface 13 toward the first reflection surface 12, which also facilitates the processing of the lens 100.

It will be appreciated that the first and second mounting portions 21, 22 may also be formed in other shapes, extending in other directions, as long as the first and second mounting portions 21, 22 are not symmetrical about the central longitudinal section 10a of the lens body 1.

According to the present invention, the lamp 200 comprises the lens 100 for the lamp 200 according to the first aspect of the present invention.

According to the utility model discloses lamps and lanterns 200, through adopting foretell lens 100, satisfied lamps and lanterns 200's lighting needs, avoided forming the illumination dark space on illumination face 101, promoted the illumination degree of consistency of whole illumination face 101.

Other constructions and operations of the luminaire 200 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

A lens 100 for a luminaire 200 according to an embodiment of the present invention is described in detail below in a specific embodiment with reference to fig. 1 to 8. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "axial", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1-4, the lens 100 is a TIR lens, which organically combines refraction and reflection principles, so as to facilitate realization of a small-angle light beam, and has advantages over other types of lenses in realization of a small-angle and narrow light beam, and the light transmittance is higher than 90%. The lens 100 comprises a lens body 1, wherein the lens body 1 is in a strip shape, and the lens body 1 extends linearly along the front-back direction; the outer surface of the lens body 1 comprises an incident surface 11, a first reflecting surface 12, a second reflecting surface 13 and a light-emitting surface 14, wherein the light-emitting surface 14 is formed into a plane, and the light-emitting surface 14 is perpendicular to the central longitudinal section 10a of the lens body 1; the incident surface 11 comprises a first incident surface 111, a second incident surface 112 and a third incident surface 113, the third incident surface 113 and the light-emitting surface 14 are arranged in an up-down opposite mode, a first reflecting surface 12 and a second reflecting surface 13 are respectively arranged on two sides of the incident surface 11, two ends of the first reflecting surface 12 are respectively connected with the incident surface 11 and the light-emitting surface 14, two ends of the second reflecting surface 13 are respectively connected with the incident surface 11 and the light-emitting surface 14, the first incident surface 111 is arranged between the third incident surface 113 and the first reflecting surface 12, the second incident surface 112 is arranged between the third incident surface 113 and the second reflecting surface 13, and the third incident surface 113 is formed into a free curved surface; when the central longitudinal section 10a of the lens body 1 is vertically arranged and the light emitting surface 14 is located above the third incident surface 113, one end of the third incident surface 113 adjacent to the first reflecting surface 12 is located above one end of the third incident surface 113 adjacent to the second reflecting surface 13.

The first incident surface 111 and the second incident surface 112 are both formed as a drawing surface, and the first incident surface 111 and the second incident surface 112 may both be formed as a plane, and extend in a direction in which the light-emitting surface 14 faces the third incident surface 113 and in a direction in which the first incident surface 111 and the second incident surface 112 face away from each other, a drawing angle of the first incident surface 111 is not equal to a drawing angle of the second incident surface 112, so that the incident surface 11 is recessed toward the light-emitting surface 14 to define a containing cavity 11a, the containing cavity 11a is suitable for containing the light source 102 of the lamp 200, and the light source 102 is a plurality of LED lamp beads arranged at intervals in the front-rear direction.

The first reflecting surface 12 comprises two sub reflecting surfaces connected with each other, the two sub reflecting surfaces are sequentially arranged along the direction from the incident surface 11 to the light emitting surface 14, each sub reflecting surface is G2 continuous, the two sub reflecting surfaces are a first sub reflecting surface 121 and a second sub reflecting surface 122 respectively, the first sub reflecting surface 121 and the second sub reflecting surface 122 are intersected to form an intersection line 120, and the intersection line 120 horizontally extends along the front-back direction; the first sub-reflecting surface 121 is disposed adjacent to the incident surface 11, the second sub-reflecting surface 122 is disposed adjacent to the light emitting surface 14, on the cross section of the lens body 1, the curvature of the projection of the first sub-reflecting surface 121 is greater than the curvature of the projection of the second sub-reflecting surface 122, on the cross section of the lens body 1, the projection of the intersecting line 120 is a point, the curvature of the projection of the first sub-reflecting surface 121 at the point is not equal to the curvature of the projection of the second sub-reflecting surface 122 at the point, and the surface area of the first sub-reflecting surface 121 is greater than the surface area of the second sub-reflecting surface 122. The second reflecting surface 13 is formed into a curved surface extending in a direction from the incident surface 11 to the light exit surface 14, and in a direction in which the first reflecting surface 12 and the second reflecting surface 13 face away from each other.

Further, as shown in fig. 1 to 3, a first mounting portion 21 and a second mounting portion 22 are respectively disposed at the left end and the right end of the lens body 1, the first mounting portion 21 is disposed between the first reflection surface 12 and the light exit surface 14, the first mounting portion 21 protrudes from the outer surface of the lens body 1, the second mounting portion 22 is disposed between the second reflection surface 13 and the light exit surface 14, the second mounting portion 22 protrudes from the outer surface of the lens body 1, and the first mounting portion 21 and the second mounting portion 22 are asymmetric with respect to the central longitudinal section 10a of the lens body 1.

As shown in fig. 1-4, in the use of the lens 100, the lens 100 is located at one side (for example, the left side in fig. 4) of the illumination surface 101, the central longitudinal section 10a of the lens body 1 can be disposed parallel to the illumination surface 101, of course, the central longitudinal section 10a of the lens body 1 can also be disposed obliquely at an angle to the illumination surface 101, and the lens 100 is disposed below the illumination surface 101, that is, the lens 100 is located obliquely below the illumination surface, and the light source 102 is disposed in the accommodating cavity 11 a. the propagation paths of the light emitted by the light source 102 can be roughly divided into six types, and the propagation paths of the six types of light are respectively the propagation path ①, the propagation path ②, the propagation path ③, the propagation path ④, the propagation path ⑤ and the propagation path ⑥ in fig. 3.

Specifically, the light ray propagating along the propagation path ① may exit from the surface of the light source 102 parallel to the central longitudinal section 10a of the lens body 1, strike the middle of the third incident surface 113 with an unchanged propagation direction and still be refracted from the light exit surface 14 in a direction parallel to the central longitudinal section 10a of the lens body 1, the light ray propagating along the propagation path ② may exit from the surface of the light source 102 upward and leftward with a smaller angle with the central longitudinal section 10a, strike the left portion of the third incident surface 113 located at the central longitudinal section 10a to be refracted, and then refract from the light exit surface 14 to the right with a smaller angle with the central longitudinal section 10a, the light ray propagating along the propagation path ③ may exit from the surface of the light source 102 upward and rightward with a smaller angle with the central longitudinal section 10a, strike the right portion of the central longitudinal section 10a of the third incident surface 113 located at the central longitudinal section 10a to be refracted, and exit from the light exit surface 14 to the right with a smaller angle with the central longitudinal section 10a, the refracted, and then exit from the light exit surface 14 to the right with a larger angle with the central longitudinal section 10a, the central longitudinal section 10a larger angle with the central longitudinal section 121 a, the light exit surface 3614 a, the central longitudinal section 14 a, the light ray reflected from the light exit surface 3614, and reflected from the central longitudinal section 14 a larger angle with the central longitudinal section 14, reflected, and reflected, reflected from the central longitudinal section 14 a larger angle with the central longitudinal section 14, and reflected from the central longitudinal section 3614, and reflected from the central longitudinal section 121, and reflected surface 3614 a larger angle with the central longitudinal section 14, and right with the larger angle with the central longitudinal section 14 a larger angle with the.

When the lens 100 is applied to a lamp 200, such as a wall washer, as shown in fig. 4 and 5, the lighting surface 101 may be a portion of a wall surface, the lamp 200 is located below the lighting surface 101, and the cut-off angle α of the lamp 200 may be specifically set according to actual requirements, when the lens 100 is applied to a lamp, such as a blackboard lamp, as shown in fig. 6 to 8, the lighting surface 101 may be a blackboard surface, the lamp 200 is located above the lighting surface 101, and has a significant polarization effect, and effective illumination supplement is performed on the upper portion of the lighting surface 101, so that the illumination uniformity of the lighting surface 101 is improved, and dark illumination areas are avoided, and the cut-off angle β ° of the lamp 200 is equal to or greater than 35 °, specifically β ° is 90 °, so as to meet the illumination requirements of the blackboard lamp.

According to the embodiment of the utility model, lens 100, simple structure, convenient to realize have kept less beam angle, have great cut-off angle, and lens 100 simple to operate can carry out the illumination replenishment to the illumination zone of illumination face 101 nearer to lamps and lanterns 200, avoids forming the illumination dark space in the zone of illumination face 101 nearer to lamps and lanterns 200 to promote the illumination degree of consistency of whole illumination face 101, guarantee the good illuminating effect of lamps and lanterns 200, satisfy the illumination requirement of lamps and lanterns 200; meanwhile, the relative position precision between the lens 100 and the light source 102 is ensured, and the fool-proof design of the lens 100 is realized.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. A lens for a luminaire, comprising:

the lens body is strip-shaped, the outer surface of the lens body comprises an incident surface, a first reflecting surface, a second reflecting surface and a light-emitting surface, the incident surface and the light-emitting surface are arranged oppositely, the incident surface is recessed towards the light-emitting surface to define a containing cavity, the containing cavity is suitable for containing a light source of the lamp, the first reflecting surface and the second reflecting surface are respectively arranged at two sides of the incident surface, two ends of the first reflecting surface are respectively connected with the incident surface and the light-emitting surface, two ends of the second reflecting surface are respectively connected with the incident surface and the light-emitting surface, the first reflecting surface comprises a plurality of sub reflecting surfaces which are connected with each other, the plurality of sub reflecting surfaces are sequentially arranged along the direction from the incident surface to the light-emitting surface, and the curvature of two adjacent sub reflecting surfaces at the corresponding intersection line is suddenly changed,

the both ends of lens body are equipped with first installation department and second installation department respectively, first installation department is established first plane of reflection with between the play plain noodles, the second installation department is established the second plane of reflection with between the play plain noodles, first installation department with the second installation department is about the central longitudinal section of lens body is asymmetric.

2. The lens for a light fixture of claim 1, wherein the second reflective surface is continuous at G1.

3. The lens for a light fixture of claim 1, wherein each said sub-reflecting surface is G2 continuous.

4. The lens of claim 1, wherein the number of the sub-reflecting surfaces is two, the two sub-reflecting surfaces are a first sub-reflecting surface and a second sub-reflecting surface respectively, the first sub-reflecting surface is disposed adjacent to the incident surface, the second sub-reflecting surface is disposed adjacent to the emergent surface, and a curvature of a projection of the first sub-reflecting surface is greater than a curvature of a projection of the second sub-reflecting surface on a cross section of the lens body.

5. The lens for a light fixture of claim 4, wherein a surface area of the first sub-reflecting surface is larger than a surface area of the second sub-reflecting surface.

6. The lens for a lamp as claimed in claim 1, wherein the incident surface includes a first incident surface, a second incident surface and a third incident surface, the third incident surface is disposed opposite to the light emitting surface, the first incident surface is disposed between the third incident surface and the first reflecting surface, the second incident surface is disposed between the third incident surface and the second reflecting surface, the third incident surface is formed as a free curved surface,

when the central longitudinal section of the lens body is vertically arranged and the light emitting surface is positioned above the third incident surface, one end of the third incident surface, which is adjacent to the first reflecting surface, is positioned above one end of the third incident surface, which is adjacent to the second reflecting surface.

7. The lens for a lamp of claim 6, wherein the first incident surface and the second incident surface are both formed as draft surfaces, and a draft angle of the first incident surface is not equal to a draft angle of the second incident surface.

8. The lens for a lamp as claimed in claim 1, wherein the light emitting surface is formed as a plane or an optical microstructure array curved surface.

9. The lens for a lamp as recited in claim 8, wherein when the light exit surface is formed as a plane,

the light emitting surface is vertical to the central longitudinal section of the lens body; or,

the light emitting surface extends along the direction from the first reflecting surface to the second reflecting surface and faces away from the incident surface to be inclined relative to the central longitudinal section.

10. The lens for a light fixture of claim 1, wherein the first and second mounting portions each extend obliquely relative to the central longitudinal section.

11. A luminaire characterized by comprising a lens for a luminaire according to any one of claims 1-10.

12. A light fixture as recited in claim 11, wherein the light fixture is a wall washer or a blackboard light.