CN216868400U - Blackboard lamp lens and blackboard lamp - Google Patents
Blackboard lamp lens and blackboard lamp Download PDFInfo
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- CN216868400U CN216868400U CN202220143980.0U CN202220143980U CN216868400U CN 216868400 U CN216868400 U CN 216868400U CN 202220143980 U CN202220143980 U CN 202220143980U CN 216868400 U CN216868400 U CN 216868400U
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- 229920001296 polysiloxane Polymers 0.000 description 4
- 239000000741 silica gel Substances 0.000 description 4
- 229910002027 silica gel Inorganic materials 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
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- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
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- 229920007962 Styrene Methyl Methacrylate Polymers 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
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- ADFPJHOAARPYLP-UHFFFAOYSA-N methyl 2-methylprop-2-enoate;styrene Chemical compound COC(=O)C(C)=C.C=CC1=CC=CC=C1 ADFPJHOAARPYLP-UHFFFAOYSA-N 0.000 description 1
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- 239000004417 polycarbonate Substances 0.000 description 1
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Abstract
The application relates to the field of optics and discloses a blackboard lamp lens and a blackboard lamp. This blackboard lamp lens includes: the light rays incident through the third incident surface are reflected by the total reflection surface and then emitted through the third transmission surface. The light rays incident through the second incident surface are emitted through the second transmission surface. The light rays incident through the first incident surface are emitted through the first transmission surface. By combining total reflection and transmission, large-angle light is effectively controlled, so that the emitted light can meet the condition of close-range installation, and the uniformity of the light irradiated on the blackboard can meet the requirement of a blackboard lamp. Simultaneously, the light source device can provide uniform and stable light and is convenient to install, and application scenes are increased.
Description
Technical Field
The application relates to the field of optics, especially relates to a blackboard lamp lens and blackboard lamp.
Background
The blackboard is the equipment of using always when teaching or meeting, sets up the blackboard in indoor because indoor light is not enough, often need throw light on, just can provide better effect.
At present, light can be provided to the blackboard through a blackboard lamp disposed at the top of the blackboard. However, the existing blackboard lamp cannot simultaneously provide uniform and stable light and is convenient to install, and the applicable scenes are few.
SUMMERY OF THE UTILITY MODEL
The main aim at of this application provides a blackboard lamp lens and blackboard lamp aims at solving current blackboard lamp and can't satisfy simultaneously and provide even stable light and be convenient for install, and the problem that suitable scene is few.
In a first aspect, the present application provides a blackboard lamp lens, comprising: the section of blackboard lamp lens includes: the light source comprises a first incidence surface, a second incidence surface, a third incidence surface, a first transmission surface, a second transmission surface, a third transmission surface and a total reflection surface.
The first end of the second transmission surface extends out of the first transmission surface, the second end of the second transmission surface extends out of the third transmission surface, one end, far away from the second transmission surface, of the third transmission surface extends out of the total reflection surface, one end, far away from the third transmission surface, of the total reflection surface extends out of the third incidence surface, one end, far away from the second transmission surface, of the first transmission surface extends out of the first incidence surface, and a second incidence surface is arranged between the first incidence surface and the third incidence surface. The light rays incident through the third incident surface are reflected by the total reflection surface and then emitted through the third transmission surface. The light rays incident through the second incident surface are emitted through the second transmission surface. The light rays incident through the first incident surface are emitted through the first transmission surface.
In some embodiments, the cross-section of the first incident surface includes a first curve, a second curve, and a third curve. The third curve is close to the first transmission surface, the first curve is close to the second incidence surface, and the second curve is arranged between the first curve and the third curve.
In some embodiments, the first curve has a radius of curvature of 2.63mm and an arc length of 0.93 mm. The radius of curvature of the second curve is 3.26mm and the arc length is 0.93 mm. The radius of curvature of the third curve is 4.25mm and the arc length is 1.46 mm.
In some embodiments, the cross-section of the second incident surface includes a first line segment, and the cross-section of the third incident surface includes a second line segment. The included angle between the first line segment and the second line segment is 80-85 degrees. The included angle between the second line segment and the vertical direction is 0-3 degrees. The length of the second line segment is 1.6mm to 1.8 mm.
In some embodiments, the first and second transmission surfaces have a cross-sectional curve f1(y)＝p1*y9+ p2*y8+p3*y7+p4*y6+p5*y5+p6*y4+p7*y3+p8*y2+p9*y+p10。
Wherein-0.0002901 is not more than p1≤-0.0001347、0.001381≤p2≤0.003473、-0.01257 ≤p3≤-0.003397、-0.008143≤p4≤-0.004044、0.02369≤p5≤-0.07261、 -0.08737≤p6≤-0.001327、-0.1118≤p7≤-0.008445、-0.1479≤ p8≤-0.001051、0.2642≤p9≤-0.3591、6.967≤p10≤-7.023。
In some embodiments, the cross-sectional curve f of the total reflection surface2(y)＝p1*y6+p2*y5+p3* y4+p4*y3+p5*y2+p6*y1+p7。
Wherein-0.08157 is not more than p1≤0.01856、-1.857≤p2≤0.4575、-17.45≤p3≤ 4.64、-86.72≤p4≤24.7、-240≤p5≤73.01、-351.6≤p6≤112.7、 -214.1≤p7≤70.07。
In some embodiments, the cross-section of the third transmissive surface includes a fourth curve, a fifth curve, a sixth curve, a seventh curve, an eighth curve, a ninth curve, and a tenth curve. The fourth curve is close to the total reflection surface, the tenth curve is close to the second transmission surface, and the fifth curve, the sixth curve, the seventh curve, the eighth curve and the ninth curve are sequentially arranged between the fourth curve and the tenth curve.
In some embodiments, the fourth curve has a radius of curvature of 13.53mm and an arc length of 0.39 mm. The radius of curvature of the fifth curve is 41.09mm and the arc length is 0.58 mm. The curvature radius of the sixth curve is 16.13mm, and the arc length is 0.70 mm. The curvature radius of the seventh curve is 10.16mm and the arc length is 0.67 mm. The radius of curvature of the eighth curve is 2.02mm and the arc length is 0.31 mm. The ninth curve has a radius of curvature of 1.05mm and an arc length of 0.45 mm. The tenth curve has a radius of curvature of 1.04mm and an arc length of 0.27 mm.
In some embodiments, a first connecting part is arranged between the total reflection surface and the third incidence surface; a second connection portion is provided between the first incident surface and the first transmission surface.
In a second aspect, the present application further provides a blackboard lamp, including the blackboard lamp lens, the light source plate, the driving assembly and the support provided in the first aspect. The blackboard lamp lens card is located in the support, and the light source board is located between blackboard lamp lens and the support. The driving assembly is arranged at the top of the support and is electrically connected with the light source board, and the driving assembly drives the light source board to emit light when being electrified and operated.
The application provides a blackboard lamp lens and blackboard lamp, through combining total reflection and transmission, effectual wide-angle light of having controlled for the light that jets out can satisfy the condition of close range installation, shines the requirement that the light degree of consistency on the blackboard also can satisfy the blackboard lamp. And meanwhile, the requirements of providing uniform and stable light and being convenient to install are met, and application scenes are increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structure diagram of a blackboard lamp lens provided in an embodiment of the present application;
fig. 2 is a schematic optical path diagram of a blackboard lamp lens provided in an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of another blackboard lamp lens provided in the embodiments of the present application;
fig. 4 is a schematic structural diagram of a blackboard lamp lens provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a blackboard lamp provided in an embodiment of the present application;
fig. 6 is a schematic installation diagram of a blackboard lamp according to an embodiment of the present application.
Legend: 100-blackboard lamp lens; 101-a first transmission face; 102-a second transmissive surface; 103-a third transmission face; 104-total reflection surface; 105-a first entrance face; 106-a second plane of incidence; 107-third entrance face; 108-a first connection; 109-a second connecting portion; 201-a first limiting part; 202-a second limiting part; 203-a first restraint post; 204-a second limit post; 300-blackboard light; 301-a drive assembly; 302-a stent; 303-a light source plate; 304-anti-glare tongue; 305-a connector; 306-a first silicone pad; 307-a second silicone pad; 308-end cap; 309-decorative sheet; 400-blackboard; 401-illuminometer.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The flow diagrams depicted in the figures are merely illustrative and do not necessarily include all of the elements and operations/steps, nor do they necessarily have to be performed in the order depicted. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Fig. 1 is a schematic cross-sectional structure view of a blackboard lamp lens provided in an embodiment of the present application, and fig. 2 is a schematic optical path view of the blackboard lamp lens provided in the embodiment of the present application.
In some embodiments, referring to fig. 1, a cross section of the blackboard lamp lens 100 includes: a first incident surface 105, a second incident surface 106, a third incident surface 107, a first transmission surface 101, a second transmission surface 102, a third transmission surface 103, and a total reflection surface 104.
The first end of the second transmission surface 102 extends out of the first transmission surface 101, the second end of the second transmission surface 102 extends out of the third transmission surface 103, one end, far away from the second transmission surface 102, of the third transmission surface 103 extends out of the total reflection surface 104, one end, far away from the third transmission surface 103, of the total reflection surface 104 extends out of the third incidence surface 107, one end, far away from the second transmission surface 102, of the first transmission surface 101 extends out of the first incidence surface 105, and a second incidence surface 106 is arranged between the first incidence surface 105 and the third incidence surface 107.
Referring to fig. 2, the light source board 303 is disposed opposite to the first incident surface 105, the second incident surface 106, and the third incident surface 107. The light beam incident through the third incident surface 107 is reflected by the total reflection surface 104 and then emitted through the third transmission surface 103. The light beam incident through the second incident surface 106 exits through the second transmission surface 102. The light beam incident through the first incident surface 105 is emitted through the first transmission surface 101.
In some embodiments, the material of the blackboard lamp lens 100 may be transparent material such as optical glass, Polycarbonate (PC), Polystyrene (PS), Polymethyl Methacrylate (PMMA), Styrene-methyl Methacrylate (MS), and the like. The blackboard lamp lens 100 may be manufactured by an injection molding process and integrally formed.
Referring to the light source board 303 in FIG. 2, the K value of the light source board 303 ranges from 2.0cd/lm to 3.0cd/lm, preferably 2.7 cd/lm. The light source board 303 may be a light-emitting diode (LED) light source, and the emitted light is in a brownian distribution, i.e., the emitted light is mainly concentrated between-60 ° and 60 °.
In some embodiments, the cross-section of the first incident surface 105 includes a first curve, a second curve, and a third curve. The third curve is close to the first transmission surface, the first curve is close to the second incidence surface, and the second curve is arranged between the first curve and the third curve. Wherein, the curvature radius of the first curve is 2.63mm, and the arc length is 0.93 mm. The radius of curvature of the second curve is 3.26mm and the arc length is 0.93 mm. The radius of curvature of the third curve is 4.25mm and the arc length is 1.46 mm. The cross section of the second incident surface 106 includes a first line segment, and the cross section of the third incident surface 107 includes a second line segment. The angle between the first and second line segments is 80 ° to 85 °, preferably 82 °. The second line segment makes an angle of 0 ° to 3 °, preferably 1 °, with the vertical. The length of the second line segment is 1.6mm to 1.8mm, preferably 1.71 mm.
In some embodiments, the cross-sectional curves f of the first and second transmission surfaces 101 and 1021(y)＝p1*y9+p2*y8+p3*y7+p4*y6+p5*y5+p6*y4+p7*y3+p8* y2+p9*y+p10。
Wherein:
-0.0002901≤p1-0.0001347, preferably-0.0002124;
0.001381≤p20.003473, preferably 0.002427;
-0.01257≤p3-0.003397, preferably-0.007986;
-0.008143≤p4-0.004044, preferably-0.00205;
0.02369≤p5-0.07261, preferably 0.04815;
-0.08737≤p6-0.001327, preferably-0.04302;
-0.1118≤p7-0.008445, preferably-0.06011;
-0.1479≤p8-0.001051, preferably-0.07449;
0.2642≤p9-0.3591, preferably 0.3117;
6.967≤p10less than or equal to-7.023, preferably 6.995.
In some embodiments, the cross-sectional curve f of the total reflection surface 1042(y)＝p1*y6+p2*y5+ p3*y4+p4*y3+p5*y2+p6*y1+p7。
Wherein:
-0.08157≤p10.01856 or less, preferably-0.03151;
-1.857≤p20.4575 or less, preferably-0.6999;
-17.45≤p34.64, preferably-6.407;
-86.72≤p424.7 or less, preferably-31.01;
-240≤p573.01 or less, preferably-83.49;
-351.6≤p6112.7 ≦ 112.7, preferably-119.5;
-214.1≤p770.07, preferably-72.
In some embodiments, the cross-section of the third transmissive surface 103 includes a fourth curve, a fifth curve, a sixth curve, a seventh curve, an eighth curve, a ninth curve, and a tenth curve. The fourth curve is close to the total reflection surface, the tenth curve is close to the second transmission surface, and the fifth curve, the sixth curve, the seventh curve, the eighth curve and the ninth curve are sequentially arranged between the fourth curve and the tenth curve.
In some embodiments, the fourth curve has a radius of curvature of 13.53mm and an arc length of 0.39 mm. The radius of curvature of the fifth curve is 41.09mm and the arc length is 0.58 mm. The curvature radius of the sixth curve is 16.13mm, and the arc length is 0.70 mm. The curvature radius of the seventh curve is 10.16mm and the arc length is 0.67 mm. The radius of curvature of the eighth curve is 2.02mm and the arc length is 0.31 mm. The ninth curve has a radius of curvature of 1.05mm and an arc length of 0.45 mm. The tenth curve has a radius of curvature of 1.04mm and an arc length of 0.27 mm.
In some embodiments, a first connection 108 is provided between the total reflection surface 104 and the third incidence surface 107, and a second connection 109 is provided between the first incidence surface 105 and the first transmission surface 101. The top surfaces of the first connection portion 108 and the second connection portion 109 are the same as the top of the light source board 303 in height, and the shape is not limited. The first connection portion 108 and the second connection portion 109 are used for mounting connection when the blackboard lamp lens is mounted into the blackboard lamp.
Fig. 3 is a schematic cross-sectional structure view of another blackboard lamp lens provided in an embodiment of the present application, and fig. 4 is a schematic structural view of a blackboard lamp lens provided in an embodiment of the present application.
In some embodiments, in order that the blackboard lamp lens 100 can be stably installed in the blackboard lamp, the blackboard lamp lens 100 shown in fig. 3 is provided. The blackboard lamp lens 100 shown in fig. 3 corresponds in optical performance to the blackboard lamp lens 100 shown in fig. 1 and 2.
Referring to fig. 3, a first limiting portion 201 extends from the joint of the total reflection surface 104 and the third transmission surface 103, and a second limiting portion 202 extends from the second connection portion 109. And a plurality of first limit posts 203 and second limit posts 204 are provided on the blackboard lamp lens 100. The first limiting part 201, the second limiting part 202, the first limiting column 203 and the second limiting column 204 are used for limiting and fixing when the blackboard lamp lens is installed in the blackboard lamp.
Referring to the blackboard lamp lens 100 shown in fig. 4, in the present application, the length of the blackboard lamp lens 100 is preferably 300mm, and 3 first limit posts 203 and 3 second limit posts 204 are provided at intervals.
Fig. 5 is a schematic structural diagram of a blackboard lamp provided in an embodiment of the present application.
In some embodiments, referring to fig. 5, the blackboard lamp includes a blackboard lamp lens 100, a light source board 303, a driving assembly 301, and a bracket 302. Blackboard lamp lens 100 card is located in support 302, and light source board 303 is located between blackboard lamp lens 100 and support 302, and drive assembly 301 is located the support 302 top, and drive assembly 301 is connected with light source board 303 electricity, and drive assembly 301 circular telegram during operation drives light source board 303 and gives out light.
In some embodiments, the blackboard lamp lens 100 is fixedly connected to the bracket 302 through the first limiting portion 201 and the second limiting portion 202, the light source plate 303 is provided with limiting holes corresponding to the first limiting post 203 and the second limiting post 204, and the light source plate 303 and the blackboard lamp lens 101 are fixed in relative position through the limiting holes and the limiting posts.
In some embodiments, the blackboard lamp further comprises: an anti-dazzle tongue 304, a connecting piece 305, a first silica gel pad 306, a second silica gel pad 307, an end cover 308 and a decorative sheet 309.
Wherein, the cross-section of support 302 is obtuse triangle, and the face that the long limit of triangle-shaped was located is first face, and first face is parallel with the horizontal direction, and drive assembly 301 passes through the mode of screw or buckle, with the first face fixed connection of support 302, still is equipped with the spread groove on the first face, and the card is equipped with at least a pair of connecting piece 305 in the spread groove, and connecting piece 305 is used for fixing blackboard lamp 300 in the top of blackboard.
The one side that support 302 is close to the blackboard is the second face, and blackboard lamp lens 100, light source board 303, anti-dazzle tongue 304 all set up in the lens fixed slot on the second face, and light source board 303 includes the base plate and a plurality of LED light sources that evenly set up on the base plate. The anti-dazzle tongue 304 is used for shielding part of the large-angle light (part of the light which does not directly irradiate the writing surface of the blackboard), so that the part of the light is prevented from irradiating human eyes, and glare is reduced.
The first silicone rubber pad 306, the second silicone rubber pad 307, the end cover 308 and the decorative sheet 309 are respectively arranged at two ends of the bracket 302. A first silicone pad 306 and a second silicone pad 307. The first silicone rubber pad 306 is used to eliminate a part of the gap between the connecting groove and the end cap 308, so as to prevent foreign matters from entering the inside of the lamp body. The second silica gel pad 307 is used for being arranged at a position where the blackboard lamp lens 100 is in contact with the end cover 308, and can effectively prevent the blackboard lamp lens 100 from shaking. The second silica gel pad 307 is larger than the blackboard lamp lens 100, so that a gap between the end cover 308 and the lens fixing groove can be eliminated, and foreign matters are prevented from entering the lamp body. The end caps 308 have a shape corresponding to the cross-sectional shape of the bracket 302 and serve to close both ends of the bracket 302. A decorative sheet 309 may be provided on the surface of the end cap 308 for decoration.
Fig. 6 is a schematic installation diagram of a blackboard lamp according to an embodiment of the present application.
In some embodiments, referring to fig. 6, when installed, the horizontal distance between the blackboard lamp 300 and the blackboard 400 is 0.3 m, and the blackboard lamp 300 is 0.15-0.65 m from the upper edge of the blackboard 400. The blackboard lamp 300 may be provided in plural, for example, at least 3 blackboard lamps 300 may be uniformly provided above the blackboard 400.
In some embodiments, a plurality of illuminometers 401 may also be provided on the blackboard 400 to acquire the illumination intensity on the blackboard. Referring to table 1, table 1 shows the illuminance intensity (illuminance) of the blackboard surface and the illuminance uniformity of the illuminance, which are collected when the blackboard lamp is actually used.
TABLE 1
According to the data in table 1, the blackboard lamp lens and the blackboard lamp provided by the application can effectively control large-angle light through combining total reflection and transmission, so that the emitted light can meet the condition of close-range installation, and the uniformity of the light irradiating on the blackboard can also meet the requirement of the blackboard lamp. And meanwhile, the requirements of providing uniform and stable light and being convenient to install are met, and application scenes are increased.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments. While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A blackboard lamp lens, characterized in that, the section of blackboard lamp lens includes: the light source comprises a first incidence surface, a second incidence surface, a third incidence surface, a first transmission surface, a second transmission surface, a third transmission surface and a total reflection surface;
the first end of the second transmission surface extends out of the first transmission surface, the second end of the second transmission surface extends out of the third transmission surface, one end, far away from the second transmission surface, of the third transmission surface extends out of the total reflection surface, one end, far away from the third transmission surface, of the total reflection surface extends out of the third incidence surface, one end, far away from the second transmission surface, of the first transmission surface extends out of the first incidence surface, and a second incidence surface is arranged between the first incidence surface and the third incidence surface;
the light rays incident through the third incident surface are reflected by the total reflection surface and then emitted through the third transmission surface;
the light rays incident through the second incident surface are emitted through the second transmission surface;
light rays incident through the first incident surface are emitted through the first transmission surface.
2. The blackboard lamp lens of claim 1, wherein the cross section of the first incident surface includes a first curve, a second curve and a third curve;
the third curve is close to the first transmission surface, the first curve is close to the second incidence surface, and the second curve is arranged between the first curve and the third curve.
3. The blackboard light lens of claim 2, wherein the first curve has a radius of curvature of 2.63mm and an arc length of 0.93 mm;
the curvature radius of the second curve is 3.26mm, and the arc length is 0.93 mm;
the radius of curvature of the third curve is 4.25mm, and the arc length is 1.46 mm.
4. The blackboard light lens of claim 1, wherein the cross section of the second incident surface includes a first line segment, and the cross section of the third incident surface includes a second line segment;
the included angle between the first line segment and the second line segment is 80-85 degrees;
the included angle between the second line segment and the vertical direction is 0-3 degrees;
the length of the second line segment is 1.6mm to 1.8 mm.
5. The blackboard lamp lens of claim 1, wherein the first and second transmission surfaces have a cross-sectional curve f1(y)＝p1*y9+p2*y8+p3*y7+p4*y6+p5*y6+p6*y4+p7*y3+p8*y2+p9*y+p10；
Wherein-0.0002901 is not more than p1≤-0.0001347、0.001381≤p2≤0.003473、-0.01257≤p3≤-0.003397、-0.008143≤p4≤-0.004044、0.02369≤p5≤-0.07261、-0.08737≤p6≤-0.001327、-0.1118≤p7≤-0.008445、-0.1479≤p8≤-0.001051、0.2642≤p9≤-0.3591、6.967≤p10≤-7.023。
6. The blackboard lamp lens of claim 1, characterized in that the cross-sectional curve f of the total reflection surface2(y)＝p1*y6+p2*y5+p3*y4+p4*y3+p5*y2+p6*y1+p7；
Wherein-0.08157 is not more than p1≤0.01856、-1.857≤p2≤0.4575、-17.45≤p3≤4.64、-86.72≤p4≤24.7、-240≤p5≤73.01、-351.6≤p6≤112.7、-214.1≤p7≤70.07。
7. The blackboard lamp lens of claim 1, wherein the cross section of the third transmission surface includes a fourth curve, a fifth curve, a sixth curve, a seventh curve, an eighth curve, a ninth curve, a tenth curve;
the fourth curve is close to the total reflection surface, the tenth curve is close to the second transmission surface, and the fifth curve, the sixth curve, the seventh curve, the eighth curve and the ninth curve are sequentially arranged between the fourth curve and the tenth curve.
8. The blackboard light lens of claim 7, wherein the fourth curve has a radius of curvature of 13.53mm and an arc length of 0.39 mm;
the curvature radius of the fifth curve is 41.09mm, and the arc length is 0.58 mm;
the curvature radius of the sixth curve is 16.13mm, and the arc length is 0.70 mm;
the curvature radius of the seventh curve is 10.16mm, and the arc length is 0.67 mm;
the curvature radius of the eighth curve is 2.02mm, and the arc length is 0.31 mm;
the curvature radius of the ninth curve is 1.05mm, and the arc length is 0.45 mm;
the curvature radius of the tenth curve is 1.04mm, and the arc length is 0.27 mm.
9. The blackboard lamp lens according to any one of claims 1 to 8, characterised in that a first connection part is provided between the total reflection surface and the third incidence surface; a second connection portion is provided between the first incident surface and the first transmission surface.
10. A blackboard lamp, characterized by comprising the blackboard lamp lens, the light source plate, the driving assembly and the bracket of any one of claims 1 to 9;
the blackboard lamp lens is clamped in the bracket, and the light source plate is arranged between the blackboard lamp lens and the bracket;
the driving assembly is arranged at the top of the support and electrically connected with the light source board, and the driving assembly drives the light source board to emit light when being electrified and operated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220143980.0U CN216868400U (en) | 2022-01-19 | 2022-01-19 | Blackboard lamp lens and blackboard lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220143980.0U CN216868400U (en) | 2022-01-19 | 2022-01-19 | Blackboard lamp lens and blackboard lamp |
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| CN216868400U true CN216868400U (en) | 2022-07-01 |
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2022
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