CN212361838U - Blackboard lamp - Google Patents

Abstract

The utility model provides a blackboard lamp belongs to illumination lamps and lanterns technical field, include: a lamp housing; the light source module comprises a light source plate arranged in the lamp shell and a driver electrically connected with the light source plate; the reflecting plate is arranged in the lamp shell; the light guide plate is stacked on the reflecting plate; and the micro lens plate is stacked on the light guide plate and comprises a body and a plurality of protruding structures arranged on the emergent surface of the body, the protruding structures are arranged in parallel, and the protruding structures are provided with top ends and bottom ends positioned at two sides of the top ends. The technical effects are as follows: the micro-lens plate is arranged on the light emitting side of the light guide plate, the micro-lens plate changes the light path by utilizing the convex structure, the light emitting angle parallel to the direction of the blackboard is increased, the deflection angle perpendicular to the direction of the blackboard is reduced, emergent light can effectively irradiate the blackboard, the light emitted into human eyes is reduced, the illumination distribution area and uniformity of the blackboard are improved, and the effects of low surface brightness, low glare and no blue light hazard are achieved.

Description

Blackboard lamp

Technical Field

The utility model belongs to the technical field of the illumination lamps and lanterns, more specifically say, relate to a blackboard lamp.

Background

Blackboard lamps are usually configured in teaching places such as classrooms and the like, so that students can clearly see writing and figures on the blackboard, and the vision health of the students can be effectively protected while teaching is assisted. The traditional blackboard lamp generally generates glare, the glare can make people feel dazzling, adverse consequences such as eye ache, lacrimation and vision reduction are caused, and people feel dizzy and easily cause vision damage after being in a glare environment for a long time. In addition, glare may also cause negative emotions such as dysphoria, unresponsiveness, and the like.

On the basis of the fact that a blackboard lamp capable of weakening glare appears, a mode of additionally arranging a grating or a diffusing agent is generally adopted, and the effect of preventing the glare of emergent light to a certain degree is achieved. However, the inventors have found that the above-mentioned antiglare effect is poor and does not effectively exert an antiglare effect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a blackboard lamp aims at solving traditional blackboard lamp anti-dazzle effect relatively poor, can't play the technical problem of anti-dazzle effect effectively.

In order to achieve the above object, the utility model adopts the following technical scheme: provided is a blackboard lamp including: the lamp comprises a lamp shell, wherein a hoisting assembly is arranged outside the lamp shell, and end covers are arranged at two ends of the lamp shell; the light source module comprises a light source plate arranged in the lamp shell and a driver electrically connected with the light source plate, and the driver is arranged on the lamp shell; the reflecting plate is arranged in the lamp shell; the light guide plate is arranged in the lamp shell and is overlapped on the reflecting plate; and the micro lens plate is arranged in the lamp shell and is overlapped on the light guide plate, the micro lens plate comprises a body and a plurality of protruding structures arranged on the emergent surface of the body in parallel, and the protruding structures are provided with top ends and bottom ends positioned at two sides of the top ends.

As another embodiment of the present invention, the arrangement distance between two adjacent top ends is

Millimeter; the arrangement distance between two adjacent bottom ends is

Millimeter; the height of the convex structure is

And (4) millimeter.

As another embodiment of the present invention, the cross-sectional shape of the protruding structure is an arc curve, and two adjacent bottom ends are symmetrically disposed about the top end.

As another embodiment of the present invention, the radius of the arc of the top end is

And (4) millimeter.

As another embodiment of the utility model, the light guide plate has relative play plain noodles and plane of reflection, and connects go out the plain noodles with the income plain noodles of plane of reflection, the plane of reflection is equipped with a plurality of sites, the light source board is located the lateral part of lamp body, and with it is relative to go into the plain noodles.

As another embodiment of the utility model, the protruding structure certainly the one end of body extends to the other end, the extending direction of protruding structure with the extending direction of light source board is the same.

As another embodiment of the present invention, the mesh points have equal sizes; the arrangement intervals between two adjacent mesh points are different, the width direction of the light guide plate is set to be the y direction, the length direction of the light guide plate is the x direction, and the density function of the mesh points in the y direction is as follows:

F(y)＝a0+a1*cos(y*w)+b1*sin(y*w)，

wherein: a0 is more than or equal to 0.39 and less than or equal to 0.3902, a1 is more than or equal to 0.06433 and less than or equal to 0.06446, b1 is more than or equal to-0.0135 and less than or equal to-0.01289, and w is more than or equal to 0.02847 and less than or equal to 0.02863;

the density function of a plurality of the mesh points in the x direction is as follows:

wherein: c is more than or equal to-4.35 e +10 and less than or equal to e +10, c is more than or equal to-e +10 and less than or equal to e +10, d is more than or equal to e +06, c is more than or equal to e +10 and less than or equal to e +06, d is more than or equal to e +06, e +06 is more than or equal to e +06, c is more than or equal to 9.33e +09, d is more than or equal to e +06 and less than or equal to 2.479e +06, c is more than or equal to e +09 and less than or equal to 2.46e +09, d is more than or equal to e +05 and less than or equal to e +05, c is more than or equal to 3.777e +08, d is more than or equal to e +05 and less than or equal to e +05, c is more than or equal to 2.789e +07 and less than or equal to e +07, d is more than or equal to 1.363 +04 and less than or equal to 1.363 +04, and less than.

As another embodiment of the present invention, the lamp housing includes a top shell, a first side shell and a second side shell connected to the top shell, and a first bottom shell and a second bottom shell connected to the first side shell and the second side shell, respectively; the light source plate is arranged on the first side shell, the reflecting plate, the light guide plate and the micro-lens plate are sequentially stacked on the first bottom shell and the second bottom shell, and the first bottom shell and the second bottom shell form an opening so that the micro-lens plate is exposed.

As another embodiment of the present invention, the first bottom casing is provided with a first partition plate, the second bottom casing is provided with a second partition plate, a first silica gel pad is arranged between the second partition plate and the second side casing, and the light guide plate is erected on the first partition plate and the second partition plate and abuts against the first silica gel pad; the micro lens plate is pressed against the first bottom shell and the second bottom shell and limited between the first partition plate and the second partition plate.

As another embodiment of the present invention, a containing groove is provided in the end cover, the containing groove is provided with a second silica gel pad, and the second silica gel pad is pressed against the reflecting plate, the light guide plate and the micro lens plate.

The utility model provides a blackboard lamp has following technological effect at least: compared with the prior art, the utility model provides an among the blackboard lamp, be equipped with the microlens board in light-emitting one side of light guide plate, the microlens board utilizes the change of protruding structure to the light path, has increased the light-emitting angle who is on a parallel with the blackboard direction, has reduced the deflection angle of perpendicular to blackboard direction for emergent light can shine the blackboard effectively, reduces the light that jets into people's eye, has improved blackboard illumination distribution area and homogeneity, has reached the effect that surperficial luminance is low, low glare, no blue light harm.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is an exploded schematic view of a blackboard lamp according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a blackboard lamp according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a blackboard illuminated by a blackboard lamp according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a microlens plate according to an embodiment of the present invention;

FIG. 5 is a partial schematic view of a microlens sheet in the configuration of FIG. 4;

fig. 6 is a schematic cross-sectional view of a blackboard lamp in an embodiment of the present invention, with a hanging component omitted;

FIG. 7 is an enlarged schematic view of configuration A in the blackboard lamp of FIG. 6;

FIG. 8 is an enlarged schematic view of structure B in the blackboard lamp of FIG. 6;

fig. 9 is an exploded view of the end cap and the second silicone pad according to an embodiment of the present invention.

In the figure:

10. blackboard lamp 100, lamp housing 110 and top housing

122. First side shell 124, second side shell 126 and card slot

132. First bottom shell 134, second bottom shell 136, first partition plate

138. A second partition plate 140, an end cap 142, and a receiving groove

152. First silica gel pad 154, second silica gel pad 200, hoist and mount subassembly

300. Light source module 310, light source board 320, driver

400. Reflecting plate 500, light guide plate 600, microlens plate

610. Body 620, protruding structure 622, top

624. Bottom 700, foam pad 20 and blackboard

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Referring to fig. 1 to 9 together, a blackboard lamp 10 according to an embodiment of the present invention will now be described.

Referring to fig. 1 to 5, an embodiment of the present invention provides a blackboard lamp 10, including: the lamp shell 100 is provided with a hoisting assembly 200 outside the lamp shell 100, and two ends of the lamp shell 100 are provided with end covers 140; the light source module 300 includes a light source board 310 disposed in the lamp housing 100, and a driver 320 electrically connected to the light source board 310, wherein the driver 320 is disposed in the lamp housing 100; a reflection plate 400 provided in the lamp housing 100; a light guide plate 500 disposed in the lamp housing 100 and stacked on the reflective plate 400; and a microlens plate 600 disposed in the lamp housing 100 and stacked on the light guide plate 500, wherein the microlens plate 600 includes a body 610 and a plurality of protruding structures 620 disposed on the emergent surface of the body 610, the plurality of protruding structures 620 are disposed in parallel, and the protruding structures 620 have a top end 622 and bottom ends 624 disposed at two sides of the top end 622.

It should be noted that, in this embodiment, the teaching environment is used as the use environment, but of course, based on the structural principle of the blackboard lamp 10 in this embodiment, the invention can also be applied to other scenes in which glare needs to be prevented.

Specifically, the lamp housing 100 not only serves as an integral support structure, but also serves as a heat sink. The hoist assembly 200 includes a hanger bar attached to the lamp housing 100 and a coupler at the end of the guide bar. One or more suspension rods may be provided according to the shape of the lamp housing 100. In this embodiment, two suspension rods are provided and are connected to the lamp housing 100 at intervals.

The light source board 310 is used to provide a light source, and the driver 320 is used to provide power to the light source board 310. The driver 320 may be disposed inside the lamp housing 100 or outside the lamp housing 100. The reflective plate 400 is generally thin and has a sheet-like structure for reflecting light. The light guide plate 500 is used for emitting the light emitted from the light source plate 310 through paths such as reflection and refraction.

In this embodiment, the micro lens plate 600 is stacked on the light emitting surface of the light guide plate 500, and the micro lens plate 600 is a transparent structure, so that the times of reflection, refraction and the like of light can be further increased, the light emitting angle of the light can be changed, and the glare phenomenon can be further improved. The size of the microlens plate 600 is not particularly required, and is designed according to the size of the lamp housing 100, for example, in the present embodiment, the length and width of the microlens plate 600 is 1156 mm × 165 mm.

Specifically, the microlens sheet 600 includes a body 610 and a protrusion structure 620, and the protrusion structure 620 includes a top end 622 and a bottom end 624, and can reflect, refract, etc. light to change the light-emitting angle of the light. The inventor researches and discovers that in a blackboard lamp without a micro-lens plate, the light-emitting angle parallel to the blackboard direction is small, the illuminance distribution is uneven, the light-emitting angle perpendicular to the blackboard direction is too large and deflects to about 50 degrees, the emergent light rays perpendicular to the blackboard part cannot be effectively irradiated on the blackboard, and the glare phenomenon is further caused. Most of the traditional improvement modes adopt grids or diffusants, and the glare phenomenon cannot be well improved. In this embodiment, the micro lens plate 600 is disposed on the light exit side of the light guide plate 500, and the light exit angle parallel to the direction of the blackboard 20 is larger by the protrusion 620, so that the uniformity of the illumination distribution is improved, and the light exit angle perpendicular to the direction of the blackboard 20 is smaller and deflects to about 30 degrees, so that the exiting light can effectively irradiate the blackboard 20 instead of the eyes of the student, so that the illumination distribution area and the uniformity of the blackboard 20 are improved.

In the research process of the inventor, the numerical values of the illuminance value of 518lx and the illuminance uniformity of 0.85 can be obtained by using a simulation experiment, and the glare phenomenon can be well improved. According to the standard IEC/TR 62778 blue light hazard testing experiment, after the micro-lens plate 600 is adopted, the safety level is RG0, the illumination and the illumination uniformity of the blackboard 20 both meet the standard requirements, and the effects of low surface brightness, low glare and no blue light hazard are achieved. Fig. 2 is a schematic diagram showing the distribution of the illuminance M of light in the direction perpendicular to the blackboard 20 when the blackboard lamp 10 is irradiated on the blackboard 20.

The embodiment of the utility model provides a blackboard lamp 10 has following technological effect at least: compared with the prior art, the embodiment of the utility model provides an among the blackboard lamp 10, be equipped with microlens board 600 in light-emitting one side of light guide plate 500, microlens board 600 utilizes the change that protruding structure 620 was to the light path, the light-emitting angle who is on a parallel with the blackboard 20 direction has been increased, the deflection angle of perpendicular to blackboard 20 direction has been reduced, make emergent light can shine blackboard 20 effectively, reduce the light of kicking into the people's eye, blackboard 20 illuminance distribution area and homogeneity have been improved, surface brightness is low, low glare, the effect of no blue light harm has been reached.

Specific values of the protruding structures 620 are not limited, and the following ranges are described as ranges in which the inventors have found that the glare phenomenon is improved, and the following ranges are selected according to the light illumination simulation experiment.

Referring to fig. 4 and 5, as an embodiment, the arrangement distance L1 between two adjacent top ends 622 is

Millimeters, i.e., 0.50 millimeters to 0.70 millimeters; the arrangement distance L2 between two adjacent bottom ends 624 is

Millimeters, i.e., 0.35 millimeters to 0.65 millimeters; the height range h of the bump structure 620 is

Millimeters, i.e., 0.135 millimeters to 0.165 millimeters. For example, L1 may be a specific value such as 0.50 mm, 0.55 mm, 0.60 mm, 0.65 mm, 0.70 mm, etc.; l2 may be 0.35 mm, 0.40 mm, 0.45 mm, 0.50 mm, 0.55 mm, 0.60 mm, 0.65 mm, etc.; h may be 0.135 mm, 0.14 mm, 0.145 mm, 0.15 mm, 0.155 mm, 0.16 mm, 0.165 mmAnd the like.

Further, the thickness H of the body 610 ranges from 0.1 mm to 3 mm. The thickness of the body 610 may be selected according to factors such as mounting size, light transmission strength, and load-bearing capacity. For example, the thickness of the body 610 may be a specific value such as 0.1 mm, 0.5 mm, 1 mm, 1.5 mm, 1.55 mm, 2 mm, 2.5 mm, and 3 mm. In this embodiment, the thickness of the body 610 is selected to be 2 millimeters, and can match factors such as corresponding installation size, light transmission strength and bearing capacity.

Without limitation, the specific shape of the protruding structure 620 is described below as a shape which is found by the inventor to be better for improving the glare phenomenon, and the following shape and numerical range are selected according to the light illumination simulation experiment.

Referring to fig. 4 and 5, as an embodiment, the cross-sectional shape of the protrusion 620 is an arc curve, and two adjacent bottom ends 624 are symmetrically disposed about the top end 622. It is understood that the sectional shape of the protrusion structure 620 refers to a shape taken perpendicular to a plane in which the protrusion structure 620 extends. The arc-shaped curve can be a single arc or formed by splicing a plurality of arcs. In order to make the emergent intensity of the light more uniform, two adjacent bottom ends 624 are disposed symmetrically with respect to the top end 622. Likewise, two adjacent top ends 622 are also disposed symmetrically about the bottom end 624. In this embodiment, the cross-sectional shape of the protrusion 620 is formed by continuously splicing a plurality of arcs to form an arc curve.

Further, the radius of curvature R of the tip 622 is

Mm, i.e. 0.165 mm to 0.195 mm. For example, R can be a specific value such as 0.165 mm, 0.17 mm, 0.175 mm, 0.18 mm, 0.185 mm, 0.19 mm, 0.195 mm, and the like.

Referring to fig. 6, in order to further improve the glare effect, as a specific implementation manner of the embodiment of the present invention, the light guide plate 500 has a light emitting surface and a reflecting surface opposite to each other, and a light incident surface connecting the light emitting surface and the reflecting surface, the reflecting surface has a plurality of dots, and the light source plate 310 is disposed on a side portion of the lamp housing 100 and opposite to the light incident surface. In this embodiment, adopt unilateral income light formula, make the light that light source board 310 sent incide the light guide plate 500 in through going into the plain noodles, the site can reduce the light angle of going out along perpendicular to blackboard 20 direction from going out the plain noodles, make emergent light on perpendicular to blackboard 20 direction, lean on blackboard direction deflection, and simultaneously, can also increase light from going out the plain noodles along the light angle of going out that is on a parallel with blackboard 20 direction, thereby make most light shine on blackboard 20, reduce the light that directly jets into student's eyes, thereby reach and prevent the glare, increase the area source degree of consistency, reduce the effect of surface brightness, make light guide plate 500 possess the effect of polarisation.

Further, the protrusion structure 620 extends from one end of the body 610 to the other end, and the extending direction of the protrusion structure 620 is the same as the extending direction of the light source board 310. In order to ensure the emitting effect of the whole microlens plate 600, the protrusion structures 620 extend from one end of the body 610 to the other end, the arrangement direction of the plurality of protrusion structures 620 is perpendicular to the extending direction of the light source plate 310, and the extending direction of the protrusion structures 620 is parallel to the extending direction of the light source plate 310.

For the arrangement sequence of a plurality of mesh points, the spacing between adjacent mesh points is generally equal, and the size of the adjacent mesh points is changed; or the sizes of the adjacent dots are equal, and the space between the adjacent dots is changed; alternatively, the size of adjacent dots varies, and the spacing between adjacent dots also varies. In this embodiment, a mode that the sizes of the adjacent dots are equal and the pitches of the adjacent dots are changed is adopted.

Specifically, the mesh points are equal in size; the arrangement intervals between two adjacent mesh points are different. The inventor researches and calculates the light intensity of various dot arrangement modes, performs curve fitting, and finds that the dot arrangement mode represented by the density function can obtain a relatively good light angle. Assuming that the width direction of the light guide plate 500 is the y direction, the length direction of the light guide plate 500 is the x direction, and the density function of the plurality of dots in the y direction is: f (y) ═ a0+ a1 cos (y) × w) + b1 sin (y) × w.

Wherein: a0 is more than or equal to 0.39 and less than or equal to 0.3902, a1 is more than or equal to 0.06433 and less than or equal to 0.06446, b1 is more than or equal to-0.0135 and less than or equal to-0.01289, and w is more than or equal to 0.02847 and less than or equal to 0.02863.

For example, a0 can be 0.39, 0.3901, 0.3902, etc.; a1 can be 0.06433, 0.06439, 0.06446 and other specific values; b1 can be-0.0135, -0.0132, -0.01289 and other specific values, and w can be 0.02847, 0.02855, 0.02863 and other specific values.

The density function of the plurality of dots in the x direction is:

wherein: c is more than or equal to-4.35 e +10 and less than or equal to e +10, c is more than or equal to-e +10 and less than or equal to e +10, d is more than or equal to e +06, c is more than or equal to e +10 and less than or equal to e +06, d is more than or equal to e +06, e +06 is more than or equal to e +06, c is more than or equal to 9.33e +09, d is more than or equal to e +06 and less than or equal to 2.479e +06, c is more than or equal to e +09 and less than or equal to 2.46e +09, d is more than or equal to e +05 and less than or equal to e +05, c is more than or equal to 3.777e +08, d is more than or equal to e +05 and less than or equal to e +05, c is more than or equal to 2.789e +07 and less than or equal to e +07, d is more than or equal to 1.363 +04 and less than or equal to 1.363 +04, and less than.

In this embodiment, the numerical ranges of c0, c1, d1, etc. are expressed by scientific notation, for example, e +10 represents 10 to the power of 10, and e +05 represents 10 to the power of 5. For example, c0 can be a specific value such as-4.35 e +10, -6.428e +08, 4.222e +10, etc.; c1 can be-7.407 e +10, 1.128e +09, 7.633e +10 and other specific values; d1 can be-4.814 e +06, -888.6, 4.812e +06 and other specific values; c2 can be-5.128 e +10, -7.59e +08, 4.976e +10 and other specific values; d2 can be-6.494 e +06, 1199, 6.496e +06, etc.; c3 can be specific values of-2.52 e +10, 3.852e +08, 2.597e +10 and the like; d3 can be-4.971 e +06, -916.3, 4.969e +06 and other specific values; c4 can be-9.616 e +09, -1.431e +08, 9.33e +09 and other specific values; d4 can be-2.478 e +06, 456.4, 2.479e +06, etc.; c5 can be-2.387 e +09, 3.675e +07, 2.46e +09 and other specific values; d5 can be-8.035 e +05, -147.7, 8.032e +05 and other specific values; c6 can be specific numerical values of-3.894 e +08, -5.844e +06, 3.777e +08 and the like; d6 can be-1.551 e +05, 28.45, 1.551e +05, etc.; c7 can be-2.789 e +07, 4.341e +05, 2.876e +07 and other specific values; d7 can be-1.363 e +04, -2.494, 1.363e +04, etc.; z may be a specific value such as-0.008712, 0.002301, 0.01332, etc.

For ease of understanding, the lamp envelope 100 will now be illustrated. Referring to fig. 6 to 9, as an embodiment of the present invention, the lamp housing 100 includes a top housing 110, two side housings connected to the top housing 110, and two bottom housings connected to the two side housings, the top housing 110, the side housings, and the bottom housing together form a receiving space for receiving the light source plate 310, the reflective plate 400, the light guide plate 500, and the microlens plate 600, and the two bottom housings form an opening to expose the microlens plate 600. In this embodiment, the lamp housing 100 not only serves as an integral supporting structure, but also plays a role in dissipating heat. An opening is formed between the two bottom cases, so that the microlens sheet 600 can be exposed in the air, and light can be emitted from the microlens sheet 600. It can be understood that the two ends of the accommodating space formed by the top shell 110, the side shell and the bottom shell are respectively fastened with the two end caps 140 to form an integral structure.

Further, referring to fig. 6 to 8, the two side cases are respectively defined as a first side case 122 and a second side case 124, the two bottom cases are respectively defined as a first bottom case 132 and a second bottom case 134, the light source plate 310 is disposed on the first side case 122, the reflective plate 400, the light guide plate 500 and the microlens plate 600 are sequentially stacked on the first bottom case 132 and the second bottom case 134, and the foam pad 700 is disposed between the reflective plate 400 and the top case 110. In the embodiment, the light source plate 310 is disposed on the first side shell 122 and opposite to the light incident surface of the light guide plate 500 to form a single-sided incident light. The inner wall of the first side casing 122 is provided with a clamping groove 126, and the light source board 310 is clamped in the clamping groove 126 to limit the light source board 310. The foam pad 700 can reduce mechanical damage between the reflection plate 400 and the top case 110 and also can play a role of buffering.

Furthermore, the first bottom case 132 is provided with a first partition 136, the second bottom case 134 is provided with a second partition 138, a first silicone pad 152 is arranged between the second partition 138 and the second side case 124, and the light guide plate 500 is erected on the first partition 136 and the second partition 138 and abuts against the first silicone pad 152; the micro lens plate 600 is pressed against the first bottom shell 132 and the second bottom shell 134 and is limited between the first partition 136 and the second partition 138. Specifically, the first partition 136 is disposed in parallel with the first side case 122, and the second partition 138 is disposed in parallel with the second side case 124. The first silicone rubber pad 152 is disposed between the second spacer 138 and the second side case 124, so as to be adapted to the light guide plates 500 with different sizes within a certain range, reduce mechanical damage between the light guide plates 500 and the second side case 124, and play a role in buffering. In this embodiment, the first silicone rubber pad 152 corresponds to the length direction of the light guide plate 500. In addition, the reflective plate 400 can also be pressed against the first silicone rubber pad 152.

Due to the arrangement of the second partition 138, in order to prevent the light guide plate 500 from being inclined, the first partition 136 is correspondingly provided at the first bottom case 132 such that both sides of the light guide plate 500 are at the same height. Simultaneously, first baffle 136, first drain pan 132, second baffle 138 and second drain pan 134 can carry on spacingly to microlens board 600, and to a certain extent, first baffle 136 and second baffle 138 can avoid light guide plate 500 directly to fold the produced gravity influence when locating microlens board 600, increase microlens board 600's life.

In order to reduce the mechanical damage of the reflective plate 400, the light guide plate 500 and the microlens 600 contacting the end cap 140, please refer to fig. 9, which is a specific implementation manner of the embodiment of the present invention, a containing groove 142 is disposed in the end cap 140, the containing groove 142 is disposed with a second silica gel pad 154, and the second silica gel pad 154 is pressed against the reflective plate 400, the light guide plate 500 and the microlens 600. It is understood that the end cap 140 corresponds to the width direction of the reflection plate 400, the light guide plate 500, and the lenticular plate 600. In this embodiment, the opening direction of the receiving groove 142 faces the reflection plate 400, the light guide plate 500 and the micro lens plate 600. The second silicone rubber pad 154 is partially accommodated in the accommodating groove 142 and partially protrudes from the accommodating groove 142, so that the second silicone rubber pad 154 can be always pressed against the reflection plate 400, the light guide plate 500 and the micro-lens plate 600.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. Blackboard lamp, its characterized in that includes:

the lamp comprises a lamp shell, wherein a hoisting assembly is arranged outside the lamp shell, and end covers are arranged at two ends of the lamp shell;

the light source module comprises a light source plate arranged in the lamp shell and a driver electrically connected with the light source plate, and the driver is arranged on the lamp shell;

the reflecting plate is arranged in the lamp shell;

the light guide plate is arranged in the lamp shell and is overlapped on the reflecting plate; and

the micro-lens plate is arranged in the lamp shell and is overlapped on the light guide plate, the micro-lens plate comprises a body and a plurality of protruding structures arranged on the emergent surface of the body in parallel, and the protruding structures are provided with top ends and bottom ends located on two sides of the top ends.

2. The blackboard lamp according to claim 1, wherein the adjacent two of the top ends are arranged at a distance of

Millimeter; the arrangement distance between two adjacent bottom ends is

Millimeter; the height of the convex structure is

And (4) millimeter.

3. The blackboard lamp according to claim 1 or 2, wherein the cross section of the convex structure is in the shape of an arc curve, and two adjacent bottom ends are symmetrically arranged about the top end.

4. Such asThe blackboard light of claim 3, in which the radius of the arc of the tip is

And (4) millimeter.

5. The blackboard lamp as claimed in claim 1, wherein the light guide plate has a light-emitting surface and a reflecting surface opposite to each other, and a light-entering surface connecting the light-emitting surface and the reflecting surface, the reflecting surface has a plurality of dots, and the light source plate is disposed at a side portion of the lamp housing and opposite to the light-entering surface.

6. The blackboard lamp according to claim 5, wherein the protrusion structure extends from one end of the body to the other end, and the extension direction of the protrusion structure is the same as the extension direction of the light source board.

7. The blackboard light of claim 5, wherein a plurality of the dots are equal in size; the arrangement intervals between two adjacent mesh points are different, the width direction of the light guide plate is set to be the y direction, the length direction of the light guide plate is the x direction, and the density function of the mesh points in the y direction is as follows:

F(y)＝a0+a1*cos(y*w)+b1*sin(y*w)，

wherein: a0 is more than or equal to 0.39 and less than or equal to 0.3902, a1 is more than or equal to 0.06433 and less than or equal to 0.06446,

﹣0.0135≤b1≤﹣0.01289，0.02847≤w≤0.02863；

the density function of a plurality of the mesh points in the x direction is as follows:

F(x)＝c0+c1*cos(x*z)+d1*sin(x*z)+c2*cos(2*x*z)+d2*sin(2*x*z)+c3*cos(3*x*z)+d3*sin(3*x*z)+c4*cos(4*x*z)+d4*sin(4*x*z)+c5*cos(5*x*z)+d5*sin(5*x*z)+c6*cos(6*x*z)+d6*sin(6*x*z)’+c7*cos(7*x*z)+d7*sin(7*x*z)

wherein: c0 is more than or equal to-4.35 e +10 and less than or equal to 4.222e +10, c1 is more than or equal to-7.407 e +10 and less than or equal to 7.633e +10,

﹣4.814e+06≤d1≤4.812e+06，﹣5.128e+10≤c2≤4.976e+10，

﹣6.494e+06≤d2≤6.496e+06，﹣2.52e+10≤c3≤2.597e+10，

﹣4.971e+06≤d3≤4.969e+06，﹣9.616e+09≤c4≤9.33e+09，

﹣2.478e+06≤d4≤2.479e+06，﹣2.387e+09≤c5≤2.46e+09，

﹣8.035e+05≤d5≤8.032e+05，﹣3.894e+08≤c6≤3.777e+08，

﹣1.551e+05≤d6≤1.551e+05，﹣2.789e+07≤c7≤2.876e+07，

﹣1.363e+04≤d7≤1.363e+04，﹣0.008712≤z≤0.01332。

8. the blackboard lamp according to claim 1, wherein the lamp housing includes a top case, a first side case and a second side case connected to the top case, and a first bottom case and a second bottom case connected to the first side case and the second side case, respectively;

the light source plate is arranged on the first side shell, the reflecting plate, the light guide plate and the micro-lens plate are sequentially stacked on the first bottom shell and the second bottom shell, and the first bottom shell and the second bottom shell form an opening so that the micro-lens plate is exposed.

9. The blackboard lamp of claim 8, wherein the first bottom casing is provided with a first partition plate, the second bottom casing is provided with a second partition plate, a first silicone pad is arranged between the second partition plate and the second side casing, and the light guide plate is erected on the first partition plate and the second partition plate and abuts against the first silicone pad; the micro lens plate is pressed against the first bottom shell and the second bottom shell and limited between the first partition plate and the second partition plate.

10. The blackboard lamp according to claim 8, wherein a receiving groove is provided in the end cap, and the receiving groove is provided with a second silicone rubber pad which is pressed against the reflection plate, the light guide plate and the micro lens plate.

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