CN204665080U - Blackboard lighting lamp - Google Patents

Abstract

The utility model relates to a classroom blackboard illuminating lamp, in particular to a blackboard illuminating lamp with high light concentrating and uniform illuminance, belonging to the field of illuminating lamps. The blackboard illuminating lamp comprises a light emitting diode, a light source substrate and a lens, the light emitting diode is fixedly installed on the light source substrate, and the lens is arranged on the light emitting surface of the light emitting diode. The lens includes a first curved surface, a second curved surface and a third curved surface, part of the light emitted by the LED passes through the arc-convex surface of the third curved surface to refract the light toward the first curved surface, and the first curved surface has a curved surface structure corresponding to the arc-convex surface In order to make most of the light exit the lens through the first curved surface, the two walls of the third curved surface are used to refract part of the light emitted by the light-emitting diode so that it is irradiated toward the second curved surface, and the second curved surface reflects the light to the second curved surface. on a surface. The utility model is applied to wall lighting such as blackboards.

Description

blackboard lighting

technical field

The utility model relates to a classroom blackboard lighting lamp, in particular to a blackboard lighting lamp with high light concentrating and uniform illuminance, belonging to the field of lighting lamps.

Background technique

In every classroom of the school there are blackboards for teachers to write on. However, most classrooms do not have blackboard lighting installed. Therefore, when students are watching the blackboard and reading the content on it, they can see the direct glare of the lighting in the classroom, which can easily cause visual fatigue.

The purpose of classroom blackboard lighting is to provide a good visual light environment to ensure that teachers can easily write on the blackboard and students can read the content on the blackboard. If the brightness of the blackboard surfaces is very different from each other, the vision is often in the process of adapting to changes with large brightness differences. In order to reduce the visual fatigue caused by this, the lighting distribution should have a certain degree of uniformity. Some classrooms use fluorescent lamps as blackboard lighting fixtures. The average illuminance of the blackboard is low, the distribution is uneven, and it will produce a lot of glare.

CN100467940C patent document discloses a double reflector blackboard lamp, two fluorescent lamps reflect light onto the blackboard through two parabolic reflectors. However, due to the full-angle emission characteristics of fluorescent lamps, a lot of light directly enters the human eye or irradiates the ground, and is reflected to the human eye, causing glare and a great waste of energy, and the structure of the lamp is relatively complicated, which is not conducive to practical application. CN203605114 patent document discloses a blackboard lamp, which uses the arc-shaped structure of the lampshade to reflect part of the light emitted by the lamp tube onto the blackboard. Although this document prevents part of the light from directly entering the students' eyes, the light reflected on the blackboard will still enter the eyes of the person, causing glare.

At present, the blackboard lighting in classrooms in our country has the following disadvantages: 1. The brightness of the blackboard is not suitable. Students study in this environment for a long time, which is easy to cause visual fatigue and cause vision loss; 2. Most classrooms do not have special blackboard lights, or Using ordinary lighting as a blackboard light, if the brightness is too high and the brightness ratio is too large, it will cause glare and reduce the visual function.

Utility model content

Therefore, the utility model proposes a blackboard lighting lamp with high light concentrating and uniform illuminance aiming at the shortcomings of the existing blackboard lighting lamps.

The utility model adopts the following technical solutions:

The blackboard lighting includes light emitting diodes, a light source substrate and a lens. The light emitting diodes are fixedly mounted on the light source substrate, and the lens is arranged on the light emitting surface of the light emitting diodes. The lens includes:

The first curved surface, the first curved surface is the outgoing surface of the lens, the first curved surface includes a first partial surface, a second partial surface and a third partial surface, the first partial surface and the third partial surface are planes, the second part The surface is an arc-convex surface, the first part of the surface and the second part of the surface are connected by an inclined plane, and the second part of the surface and the third part of the surface are directly connected;

The second curved surface is used as the side surface of the lens. The two second curved surfaces are located on both sides of the first curved surface. The first part surface and the third part surface of the first curved surface are respectively connected to a second curved surface, and the second curved surface is inclined to the light source substrate. corner settings;

The third curved surface is formed by being concave inside the lens, and the concave space of the third curved surface is set on the light emitting surface of the light source substrate. The wall surfaces on the side are used to guide the light outward, and the two wall surfaces are respectively connected with the two second curved surfaces;

Further, the wall surface of the third curved surface is a planar structure.

Further, the angle between the arc-convex surface of the third curved surface and the wall surface is an acute angle.

Further, the second curved surface is an arc-convex surface or a planar structure.

Further, the projection range of the arc-convex surface of the third curved surface on the light source substrate covers the light source.

Further, the light source substrate and the lens are elongated structures, and a plurality of LED light sources are arranged on the light source substrate.

Further, the blackboard illuminating lamp also includes a lamp housing. There is an inwardly recessed lamp holder obliquely below the lamp housing. The lamp holder has a structure matching the light source substrate and the lens.

Compared with the prior art, the utility model adopts a special lens structure to make the light emit along a certain angle. A lens is arranged under the light-emitting diode, and the light emitted by the light-emitting diode is refracted by the lens to realize directional scattering, and the light is obliquely irradiated on the blackboard at a certain angle. Since the light is irradiated to the blackboard through the lens, the light occupancy rate on the blackboard is very high, which not only reaches the standard illuminance value, but also softly and evenly distributes the light, effectively preventing glare. The utility model is applied to wall lighting such as blackboards.

Description of drawings

Fig. 1 is a cross-sectional light path diagram of a blackboard illuminating lamp;

Fig. 2 is a sectional view of the lens of the blackboard illuminating lamp;

Fig. 3 is a schematic diagram of a lamp housing of a blackboard illuminating lamp;

Fig. 4 is the rear view of the lamp housing of the blackboard illuminating lamp;

Fig. 5 is a left view of the lamp housing of the blackboard illuminating lamp.

Detailed ways

In order to further illustrate various embodiments, the utility model provides accompanying drawings. These drawings are part of the disclosure content of the present invention, which are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementations and advantages of the present utility model. Components in the figures are not drawn to scale, and similar component symbols are generally used to denote similar components.

The utility model is further described now in conjunction with accompanying drawing and specific embodiment.

Fig. 1 is a cross-sectional light path diagram of a blackboard illuminating lamp in a preferred embodiment of the present invention. The blackboard illuminating lamp includes: a lens 1, a light emitting diode 2 and a light source substrate 3, wherein the light emitting diode 2 is fixedly mounted on the light source substrate 3, and the lens 1 is arranged on the light emitting surface of the light emitting diode 2. The lens 1 includes a first curved surface 11 , a second curved surface 12 and a third curved surface 13 , two sides of the first curved surface 11 are connected to two second curved surfaces 12 , and the other side of the two second curved surfaces 12 is connected to the third curved surface 13 .

Referring to FIG. 2 , it is a cross-sectional view of the lens 1 . The first curved surface 11 is the outgoing surface of the lens 1 , and all the light from the LED 2 is irradiated through the first curved surface 11 . The first curved surface 11 includes a first partial surface 111 , a second partial surface 112 and a third partial surface 113 , the first partial surface 111 and the third partial surface 113 are planes, and the second partial surface 112 is an arc-convex surface. The first partial surface 111 is connected to the second partial surface 112 via an inclined surface, and the second partial surface 112 and the third partial surface 113 are directly connected to each other. The angles of refraction of the three partial surfaces are different, so that the direction of the light irradiated from the first curved surface 11 is different, and the light is evenly distributed.

There are two second curved surfaces 12, which are respectively located on both sides of the lens 1. The first partial surface 111 and the third partial surface 113 of the first curved surface 11 are respectively connected to a second curved surface 12, and the second curved surface 12 is inclined to the light source substrate 3. angle set. The function of the second curved surface 12 is to change the direction of the light so that the light irradiates towards the direction of the first curved surface 11 . The second curved surface 12 can be an arc-convex structure or a planar structure, and the second curved surface 12 in this embodiment adopts a planar structure.

The third curved surface 13 is close to the light source substrate 3, and the third curved surface 13 is formed by being concave to the inside of the lens 1. The concave space of the third curved surface 13 is arranged on the light-emitting surface of the light source substrate 3, and the third curved surface 13 includes The arc convex surface 131 for converging light and the wall surfaces 132 arranged on both sides for guiding the light outward, the two wall surfaces 132 are respectively connected with the two second curved surfaces 12 . The third curved surface 13 is used as a light incident surface, and light from the LED 2 enters the lens 1 from the third curved surface 13 .

It should be noted that the two wall surfaces 132 of the third curved surface 13 in this embodiment are planar structures, and the included angle between the arc-convex surface 131 and the wall surface 132 of the third curved surface 13 is an acute angle.

As shown in FIG. 1 , part of the light emitted by the light emitting diode 2 passes through the arc convex surface 131 of the third curved surface 13 to refract the light toward the first curved surface 11, and the first curved surface 11 has a curved surface structure corresponding to the arc convex surface 131 so as to facilitate Most of the light is emitted from the lens 1 through the first curved surface 11, and the two wall surfaces 132 of the third curved surface 13 are used to refract part of the light emitted by the light emitting diode 2 so that it is irradiated toward the second curved surface 12, and the second curved surface 12 The light is reflected onto the first curved surface 11 . The light rays are refracted from the three partial surfaces of the first curved surface 11 and evenly irradiated onto the blackboard 5 .

It should be noted that the lens 1 is a strip-shaped structure, and FIG. 2 is a schematic cross-sectional view thereof. The light source substrate 3 is also an elongated structure, and a plurality of LED light sources are arranged on the light source substrate 3 .

The light from the light-emitting diode 2 is directly irradiated onto the blackboard 5 through the lens 1, which effectively increases the occupancy rate of the light on the blackboard; and the light from the lens 1 is obliquely incident on the blackboard 5, and the light is reflected by the blackboard 5 and shines on the ground , will not enter the eyes of students, avoiding glare. The lens 1 of this embodiment directs and disperses the light of the light emitting diode 2 onto the blackboard 5 , so that the light distribution on the blackboard 5 is uniform.

Referring to FIG. 3 to FIG. 5 , in this embodiment, the blackboard lighting lamp is placed in the lamp housing 4 . The lamp housing 4 includes a lamp holder 41 , a connection 42 , and a bracket 43 . The lamp holder 41 is located obliquely below the lamp housing 4 , and the connection 42 is arranged on the back of the lamp housing 4 . The connection 42 is used to fix the lamp housing 4 on the bracket 43 , and the lamp holder 41 is used to fix the blackboard lighting lamp. The structure of the lamp holder 41 matches the structure of the blackboard lighting lamp, and can place and fix the blackboard lighting lamp.

As shown in FIG. 3 , the structure of the lamp holder 41 is recessed into the lamp housing 4 , the slant plate inside the lamp holder 41 cooperates with the light source substrate 3 , and the light emitting surface of the light source substrate 3 faces the direction of the lens 1 . The notch on the edge of the lamp holder 41 cooperates with the structure of the lens 1 to realize the function of fixing the lens 1 .

Firstly, put the light source substrate 3 and the lens 1 into the lamp holder 41 , and then use plugs to block both ends of the lamp housing 4 to fix the light source substrate 3 and the lens 1 . During installation, use the bracket to install the blackboard lighting lamp on the oblique top of the blackboard 5, the blackboard lighting lamp is perpendicular to the wall where the blackboard 5 is located, and has a certain distance from the wall where the blackboard 5 is located.

Although the utility model has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that, without departing from the spirit and scope of the utility model defined by the appended claims, changes in form and details may be made. Making various changes to the utility model is within the protection scope of the utility model.

Claims (7)

1. blackboard lighting lamp, comprises light emitting diode, light source substrate and lens, and light emitting diode is fixedly mounted on light source substrate, and lens are arranged on the exiting surface of light emitting diode, it is characterized in that, described lens comprise:

First surface, this first surface is the exit facet of lens, this first surface comprises Part I face, Part II face and Part III face, this Part I face and Part III face are all planes, this Part II face is arc convex surface, Part I face is connected by an inclined-plane with Part II face, and this Part II face and Part III face directly connect;

Second curved surface, as the side of lens, two the second curved surfaces are positioned at the both sides of first surface, and Part I face and the Part III face of first surface are connected second curved surface respectively, and the second curved surface and light source substrate are that an oblique angle is arranged;

3rd curved surface, 3rd curved surface is recessed to form to lens interior, the dented space of the 3rd curved surface is arranged on the exiting surface of light source substrate, 3rd curved surface comprise be arranged on bottom for converging the arc convex surface of light and be arranged on the wall for outwards leading to light of both sides, these two walls are connected with two the second curved surfaces respectively.

2. blackboard lighting lamp as claimed in claim 1, is characterized in that: the wall of described 3rd curved surface is planar structure.

3. blackboard lighting lamp as claimed in claim 2, is characterized in that: the described arc convex surface of the 3rd curved surface and the angle of wall junction are acute angle.

4. blackboard lighting lamp as claimed in claim 1, is characterized in that: described second curved surface is arc convex surface structure or planar structure.

5. blackboard lighting lamp as claimed in claim 1, is characterized in that: the drop shadow spread of arc convex surface on light source substrate of described 3rd curved surface covers light source.

6. blackboard lighting lamp as claimed in claim 1, is characterized in that: described light source substrate and lens are all string configuration, and on light source substrate, arrangement is provided with plurality of LEDs light source.

7. the blackboard lighting lamp as described in any one of claim 1 to 6, is characterized in that: also comprise lamp housing, and lamp housing tiltedly below has the lamp socket caved inward, and lamp socket has the structure matched with light source substrate and lens.