CN210637978U

CN210637978U - Lens for blackboard lamp

Info

Publication number: CN210637978U
Application number: CN201921232895.6U
Authority: CN
Inventors: 吴民翊; 兰德成
Original assignee: Guangdong Bangfu Optics Co ltd
Current assignee: Guangdong Bangfu Optics Co ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-05-29
Anticipated expiration: 2029-07-31

Abstract

The utility model discloses a lens for blackboard lamp, including the lens body, the surface of lens body includes the incident surface, first plane of reflection, second plane of reflection and goes out the plain noodles, goes out the relative setting of plain noodles and incident surface, and first plane of reflection is located the both sides of incident surface respectively with the second plane of reflection, and the incident groove has been seted up to the bottom of lens body, and the incident surface is formed by protruding the arranging of a plurality of arcs for the surface of curved surface and first plane of incidence including first plane of incidence and second plane of incidence and third plane of incidence. The utility model discloses the incident face of lens body is formed by arranging by a plurality of arc archs including setting up the first incident face that sets up in the incident groove bottom and set up the second incident face and the third incident face in the incident groove side with going out the relative setting of plain noodles in the incident groove bottom, first incident face, and light can make light disperse to both sides after the arc is protruding for the light of emiting is more even, and the degree of consistency of blackboard improves.

Description

Lens for blackboard lamp

[ technical field ] A method for producing a semiconductor device

The utility model relates to a lens for blackboard lamp.

[ background of the invention ]

In order to meet the requirement of uniformly illuminating a blackboard, classroom blackboard lamps issued by the nation in 2019, 4, 1 and reasonably required to be installed at reasonable positions and distributed with light intensity so as to meet the use requirement. Aiming at the practical use condition of the blackboard illumination lamp: the blackboard lamp is suitable to be installed between the standing position of the teacher and the blackboard, and the horizontal distance between the blackboard lamp and the blackboard is less than 0.4m, so that glare caused by light irradiating eyes of the teacher can be avoided. However, since the distance between the blackboard lamp and the blackboard is very close, the traditional optical scheme is difficult to meet the requirements for realizing the blackboard illumination effect with high uniformity and high luminous efficiency.

The utility model discloses it is based on above problem produces.

[ Utility model ] content

The utility model aims at providing a lens for blackboard lamp to prior art not enough, illumination is more even.

In order to solve the technical problem, the utility model provides a following technical scheme: the utility model provides a lens for blackboard lamp, its characterized in that includes the lens body, and the surface of lens body includes incident surface, first plane of reflection, second plane of reflection and goes out the plain noodles, go out the relative setting of plain noodles and incident surface, first plane of reflection is located the both sides of incident surface respectively with the second plane of reflection, the incident groove has been seted up to the bottom of lens body, the incident surface including set up in the incident groove bottom and with go out the relative first plane of incidence that sets up of plain noodles and set up second plane of incidence and the third plane of incidence at the incident groove side, first plane of incidence is that the surface of curved surface and first plane of incidence is formed by protruding the arranging of a plurality of arcs.

The lens for the blackboard lamp is characterized in that the lens body is in a strip shape.

The lens for a blackboard lamp as described above, wherein the longitudinal section of the first incident surface is waved.

The lens for a blackboard lamp as described above, wherein the surface area of the second reflecting surface is larger than the surface area of the first reflecting surface.

Compared with the prior art, the utility model discloses a lens for blackboard lamp has following beneficial effect:

the utility model discloses the incident face of lens body is formed by arranging by a plurality of arc archs including setting up the first incident face that sets up in the incident groove bottom and set up the second incident face and the third incident face in the incident groove side with going out the relative setting of plain noodles in the incident groove bottom, first incident face, and light can make light disperse to both sides after the arc is protruding for the light of emiting is more even, and the degree of consistency of blackboard improves.

[ description of the drawings ]

The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a perspective view of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a cross-sectional view of the AA plane of FIG. 2;

FIG. 4 is a schematic view of the light path through the present invention;

fig. 5 is a schematic view of another optical path through the present invention.

[ detailed description ] embodiments

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1 to 5, in the present embodiment, a lens for a blackboard lamp includes a lens body 1, an outer surface of the lens body 1 includes an incident surface 11, a first reflective surface 12, a second reflective surface 13 and an exit surface 14, the exit surface 14 and the incident surface 11 are disposed opposite to each other, the first reflective surface 12 and the second reflective surface 13 are respectively located at two sides of the incident surface 11, the bottom of the lens body 1 is provided with an incident groove 101, the incident surface 11 includes a first incident surface 111 disposed at the bottom of the incident groove 101 and disposed opposite to the exit surface 14, and a second incident surface 112 and a third incident surface 113 disposed at a side of the incident groove 101, the first incident surface 111 is a free curved surface, and a surface of the first incident surface 111 is formed by arranging a plurality of arc-shaped protrusions 1111. Light can make light disperse to both sides after the arc is protruding for the light that jets out is more even, and the degree of consistency of blackboard improves.

As can be seen from fig. 2, two sides of the first reflective surface 12 are connected to the third incident surface 113 and the light emitting surface 14, respectively, and two sides of the second reflective surface 13 are connected to the second incident surface 112 and the light emitting surface 14, respectively; and whole lens are non-centrosymmetric for light can be partial to one side, is applicable to the blackboard lamp and washes the pinup.

As shown in fig. 1 to 5, in the present embodiment, the lens body 1 is in a strip shape; the whole area to be illuminated can be ensured to be illuminated.

As shown in fig. 3, the longitudinal section of the first incident surface 111 is wavy, and as can be seen from fig. 4, light rays are scattered and irradiated to both sides after passing through the first incident surface, so that the emitted light rays are more uniform, and the uniformity of the blackboard or wall washing is improved.

As shown in fig. 1 to 5, in the present embodiment, the surface area of the second reflecting surface 13 is larger than that of the first reflecting surface 12. Ensuring that most of the light strikes the area to be illuminated.

Claims

1. A lens for a blackboard lamp is characterized by comprising a lens body (1), 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), the light emitting surface (14) and the incident surface (11) are arranged oppositely, the first reflecting surface (12) and the second reflecting surface (13) are respectively positioned at two sides of the incident surface (11), the bottom of the lens body (1) is provided with an incidence groove (101), the incidence surface (11) comprises a first incidence surface (111) which is arranged at the bottom of the incidence groove (101) and is opposite to the light-emitting surface (14), and a second incidence surface (112) and a third incidence surface (113) which are arranged on the side surface of the incidence groove (101), the first incident surface (111) is a curved surface, and the surface of the first incident surface (111) is formed by arranging a plurality of arc-shaped protrusions (1111); the surface area of the second reflecting surface (13) is larger than that of the first reflecting surface (12).

2. A lens for a blackboard lamp according to claim 1, characterised in that the lens body (1) is in the shape of a strip.

3. A lens for a blackboard lamp, according to claim 1, characterised in that the longitudinal section of the first incident surface (111) is undulated.