CN213746331U - Blackboard lamp lens - Google Patents
Blackboard lamp lens Download PDFInfo
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- CN213746331U CN213746331U CN202022989445.0U CN202022989445U CN213746331U CN 213746331 U CN213746331 U CN 213746331U CN 202022989445 U CN202022989445 U CN 202022989445U CN 213746331 U CN213746331 U CN 213746331U
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Abstract
The utility model relates to a blackboard lamp lens, which is strip-shaped, the left part of which is provided with a light inlet cavity and the right part of which is provided with a light outlet cavity, the two sides of which are provided with an A reflecting surface and a B reflecting surface, the upper part and the lower part of the light outlet cavity are provided with an upper light outlet surface and a lower light outlet surface, and the top end and the bottom end are respectively provided with an A mounting structure and a B mounting structure; the light inlet cavity comprises a side surface A light inlet surface, a side surface B light inlet surface and an inclined bottom light inlet surface which are subjected to grain sunning treatment; the included angle between the bottom light incident surface and the reference surface is 80-88 degrees; the light-emitting cavity comprises a side surface A light-emitting surface, a side surface B light-emitting surface and an inclined bottom light-emitting surface which are subjected to line-drying treatment; the LED light-emitting chip is arranged on one side of the light inlet cavity. The utility model discloses the light-emitting is even, can effectively solve mr's glare problem, can not cause the glare to the student, can solve blackboard face edge rainbow spot and yellow spot problem.
Description
Technical Field
The utility model belongs to the technical field of the illumination lamps and lanterns, especially, relate to a blackboard lamp lens.
Background
With the increasing importance of the country on the eye health of teenagers, the reduction of the myopia rate of the teenagers becomes an important part of the deepened education and reform. The creation of comfortable and healthy eye environment is the key for protecting the eyesight health of students and promoting the high-efficiency learning of the students. According to research, the most urgent problem to be solved for blackboard lamps in classroom environments of primary and secondary schools is that (1) the blackboard surface illumination and uniformity are insufficient, cannot meet the basic requirements of national standards, and affects the eyesight health of students; (2) the blackboard lamp has a serious glare problem on teachers, which influences the teaching of the teachers, but the deflection angle of the lens is too large, which can cause glare on students; (3) the blackboard lamps and lanterns shine and have yellow spot or rainbow spot all around the facula on the blackboard face, influence the student and look over the blackboard face content, influence student and mr's comfort level of going on class.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a blackboard lamp lens of high degree of consistency, anti-dazzle.
In order to solve the technical problem, the blackboard lamp lens of the utility model is a strip shape, the left part of the blackboard lamp lens is provided with a light inlet cavity, the right part of the blackboard lamp lens is provided with a light outlet cavity,two sides are provided with A reflecting surfaces b1And B reflecting surface B2The upper and lower parts of the light-emitting cavity are provided with an upper light-emitting surface c adopting sunning stripes4And a lower light emitting surface c5The top end and the bottom end are respectively provided with an A mounting structure d1And B mounting structure d2(ii) a It is characterized in that the light inlet cavity comprises a side surface A light inlet surface a processed by adopting a sun print1And a side light incident surface A3And an inclined bottom light incident surface a2(ii) a Bottom light incident surface a2The included angle alpha between the reference surface and the reference surface is 80 degrees to 88 degrees; the light-emitting cavity comprises a side surface A light-emitting surface c processed by adopting a sun print1And a side light-emitting surface c of the B side surface3And an inclined bottom light-emitting surface c2(ii) a The LED light-emitting chip is arranged on one side of the light inlet cavity.
The side surface A is provided with a light incident surface a1And a side light incident surface A3And a bottom light incident surface a2Are all plane; side surface light incident surface a1The acute angle formed between the reference plane e and the side light incident surface a is larger than that of the B side light incident surface a3Forming an acute angle with the reference plane e; side surface light incident surface a1Has a cross-sectional length greater than that of the light incident surface a on the side surface B3Cross-sectional length of (a).
The A reflecting surface b1And B reflecting surface B2All are inward-bent reflecting cambered surfaces, A reflecting surface b1Has a cross-sectional arc length smaller than that of the reflecting surface B2Cross-sectional arc length of (a).
The bottom light emitting surface c2Is a cambered surface, and the included angle beta between the chord surface f and the reference surface e is 83-89 degrees.
The bottom light emitting surface c2The included angle beta between the plane and the reference plane e can be 83-89 degrees.
The side surface A is provided with a light-emitting surface c1And a side light-emitting surface c of the B side surface3Are all plane, and the side surface A is provided with a light-emitting surface c1An acute angle formed between the reference plane e and the light emergent surface c of the side face B is smaller than that of the light emergent surface c of the side face B3An acute angle formed between the light source and the reference plane e, and a side surface light-emitting surface c1Is less than the length of the light emergent surface c of the side surface B3Cross-sectional length of (a).
The side surface A is provided with a light-emitting surface c1And a side light-emitting surface c of the B side surface3Can also be cambered surfaces, and the A side surface emits lightNoodle c1The chord plane and the reference plane e form an acute angle smaller than that of the light-emitting surface c of the side surface B3The chord plane and the reference plane e form an acute angle, and the side surface A has a light-emitting surface c1Is less than the length of the section of the light emergent surface c of the side surface B3Cross-sectional length of (a).
The upper light-emitting surface c4And a lower light emitting surface c5Are all plane and the upper light-emitting surface c4Is less than the light emitting surface c below5Cross-sectional length of (a).
The A mounting structure d1And B mounting structure d2Are different in thickness.
Has the advantages that:
the blackboard lamp lens related in the utility model has uniform light emitting, the uniformity can reach 0.8 when the lens irradiates the blackboard surface with the height of 1200mm, the illumination is more than 500lx, and the national standard is met; the vertical distance between the installation position and the blackboard is short, and the lens does not need to rotate by too large angle, so that the glare problem of teachers can be effectively solved, and the glare of students can not be caused; the light incidence cavity surface and the light emergence cavity surface of the blackboard lamp lens adopt a grain drying process, so that the problems of rainbow spots and yellow spots on the edge of the blackboard surface are solved; the blackboard lamp lens structure is small in size, light in weight and capable of reducing cost.
Drawings
Fig. 1 is a cross-sectional view of the present invention.
Fig. 2 is a schematic view of the overall structure of the present invention.
Fig. 3 is a polar coordinate diagram of a light distribution curve of the present invention.
Fig. 4 is a view of the installation position of the present invention.
Fig. 5 is a simulation diagram of the light spot uniform effect of the utility model on the blackboard surface.
Detailed Description
In order to make the technical problem, technical scheme and effect that the utility model solved present clearer, some combine the attached drawings and embodiment, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are examples only for the purpose of illustrating the invention, and are not to be construed as limiting the invention.
The utility model discloses an upper and lower, left and right, top, bottom, top surface, bottom surface etc. word, only for the position relation of each part of clear description, but these words can not constitute the restriction to the scope of protection of the utility model.
As shown in fig. 2, the whole blackboard lamp lens of the present invention is a strip shape.
As shown in figure 1, the left part of the blackboard lamp lens of the utility model is provided with a light inlet cavity, the right part is provided with a light outlet cavity, and the upper and lower sides are provided with A reflecting surfaces b1And B reflecting surface B2The upper and lower parts of the light-emitting cavity are provided with an upper light-emitting surface c4And a lower light emitting surface c5(ii) a For the matching of the blackboard lamp lens and the aluminum shell of the blackboard lamp, the top end and the bottom end of the blackboard lamp lens are respectively provided with an A mounting structure d convenient for mounting and fixing1And B mounting structure d2(ii) a The LED light-emitting chip is 3.5mm long, 2.8mm wide and 0.7mm thick, is arranged on one side of the light-entering cavity, and a set distance exists between the light-emitting surface of the LED light-emitting chip and the left end face of the blackboard lamp lens so as to improve heat dissipation; the long side of the LED light-emitting chip is parallel to the stretching direction of the blackboard lamp lens, and the short side of the LED light-emitting chip is parallel to the left end face of the blackboard lamp lens.
The light incident cavity comprises a side surface A light incident surface a processed by adopting a sun print1And a side light incident surface A3And an inclined bottom light incident surface a2(ii) a Bottom light incident surface a2The included angle alpha between the reference plane e and the reference plane e is 80-88 degrees; side surface light incident surface a1And a side light incident surface A3And a bottom light incident surface a2Are all plane; side surface light incident surface a1And a side light incident surface A3Inclined to the reference plane e, the light incident surface a of side A1The acute angle formed between the reference plane e and the side light incident surface a is larger than that of the B side light incident surface a3Forming an acute angle with the reference plane e; side surface light incident surface a1Has a cross-sectional length greater than that of the light incident surface a on the side surface B3Cross-sectional length of (a). By arranging the A side light incident surface a1And B side light incident surface a3Is incident on the reflecting surface A and the length of the cross section of the reflecting surface B is controlled1And B reflecting surface B2How much light is; by arranging the A side light incident surface a1And B side light incident surface a3To control the angle of incidence on the reflecting surface a1And B reflecting surface B2The angle of the light.
The A reflecting surface b1And B reflecting surface B2All are inward-bent reflecting cambered surfaces; a reflecting surface b1Has a cross-sectional arc length smaller than that of the reflecting surface B2Cross-sectional arc length of (a).
The light-emitting cavity comprises a side A light-emitting surface c processed by adopting a sun print1And a side light-emitting surface c of the B side surface3And an inclined bottom light-emitting surface c2. Bottom light emitting surface c2Can be an inward curved surface, and the included angle beta between the chord surface f and the reference surface e is 83-89 degrees; bottom light emitting surface c2The included angle beta between the plane and the reference plane e is 83-89 degrees; side A light emitting surface c1And a side light-emitting surface c of the B side surface3The arc surfaces can be planes respectively inclined to the reference plane e or arc surfaces respectively inclined to the reference plane e; side A light emitting surface c1Is less than the length of the light emergent surface c of the side surface B3Cross-sectional length of (a).
The upper light-emitting surface c4And a lower light emitting surface c5Are all vertical planes processed by line drying, and the upper light-emitting surface c4Is less than the light emitting surface c below5Cross-sectional length of (a).
The above-described cross-sectional lengths all refer to the lengths shown in fig. 1.
The side surface A is provided with a light incident surface a1And the B side light incident surface a3A reflection surface b1And B reflecting surface B2Side A light emitting surface c1And a side light-emitting surface c of the B side3And a light emitting surface c above the A4And a light emitting surface c above B5The asymmetric design is adopted, the blackboard lamp lens polarization is realized under the synergistic effect, and the emergent light spots are more uniform.
The A mounting structure d1Is less than the thickness of the mounting structure D2The thickness of (2) to installer difference blackboard lamp lens left and right ends for prevent staying.
The bottom light incident surface a2Is smaller than the bottom light-emitting surface c2Can be made to enter the light surface a from the bottom2Incident light is obtainedSufficient diffusion.
Side surface light incident surface a1And a side light incident surface A3And a bottom light incident surface a2And a light emitting surface c above the A4And a light emitting surface c above the light source B5Side A light emitting surface c1And a side light-emitting surface c of the B side surface3And a bottom light-emitting surface c2All through shining the line and handling, when solving the macula lutea problem, also can play even facula effect, improve blackboard face degree of consistency.
The utility model discloses horizontal and vertical grading curve of blackboard lamp lens is shown in fig. 3, and horizontal luminous angle is 110, and vertical luminous angle is 23.
As shown in fig. 4, the blackboard height is 1200mm, uses three being equipped with the utility model discloses the blackboard lamps and lanterns of blackboard lamp lens, the interval is 350mm, and blackboard lamp lens light-emitting surface is apart from blackboard horizontal distance 430mm, vertical distance 170 mm. The graph of the uniform effect illumination of the blackboard lamp lens matched with the LED light-emitting chip is shown in figure 5. As can be seen from FIG. 5, the uniformity of the light on the surface of the blackboard with the height of 1200mm can reach 0.8, and the illumination intensity is more than 500 lx.
The blackboard lamp lens is made of PMMA and is prepared by adopting an injection molding process.
Claims (9)
1. A blackboard lamp lens is in a strip shape, the left part of the blackboard lamp lens is provided with a light inlet cavity, the right part of the blackboard lamp lens is provided with a light outlet cavity, and the two sides of the blackboard lamp lens are provided with A reflecting surfaces b1And B reflecting surface B2The upper and lower parts of the light-emitting cavity are provided with an upper light-emitting surface c adopting line-drying treatment4And a lower light emitting surface c5The top end and the bottom end are respectively provided with an A mounting structure d1And B mounting structure d2(ii) a It is characterized in that the light inlet cavity comprises a side surface A light inlet surface a processed by adopting a sun print1And a side light incident surface A3And an inclined bottom light incident surface a2(ii) a Bottom light incident surface a2The included angle alpha between the reference surface and the reference surface is 80 degrees to 88 degrees; the light-emitting cavity comprises a side surface A light-emitting surface c processed by adopting a sun print1And a side light-emitting surface c of the B side surface3And an inclined bottom light-emitting surface c2(ii) a The LED light-emitting chip is arranged on one side of the light inlet cavity.
2. The blackboard lamp lens of claim 1, in which the side surface a is the light incident surface a1And a side light incident surface A3And a bottom light incident surface a2Are all plane; side surface light incident surface a1The acute angle formed between the reference plane e and the side light incident surface a is larger than that of the B side light incident surface a3Forming an acute angle with the reference plane e; side surface light incident surface a1Has a cross-sectional length greater than that of the light incident surface a on the side surface B3Cross-sectional length of (a).
3. The blackboard lamp lens of claim 1, in which the reflecting surface A is a reflecting surface b1And B reflecting surface B2All are inward-bent reflecting cambered surfaces, A reflecting surface b1Has a cross-sectional arc length smaller than that of the reflecting surface B2Cross-sectional arc length of (a).
4. The blackboard lamp lens of claim 1, wherein the bottom light exit surface c2Is a cambered surface, and the included angle beta between the chord surface f and the reference surface e is 83-89 degrees.
5. The blackboard lamp lens of claim 1, wherein the bottom light exit surface c2Is a plane and forms an included angle beta of 83-89 degrees with the reference plane e.
6. The blackboard lamp lens of claim 1, wherein the side a light emitting surface c1And a side light-emitting surface c of the B side surface3Are all plane, and the side surface A is provided with a light-emitting surface c1An acute angle formed between the reference plane e and the light emergent surface c of the side face B is smaller than that of the light emergent surface c of the side face B3An acute angle formed between the light source and the reference plane e, and a side surface light-emitting surface c1Is less than the length of the light emergent surface c of the side surface B3Cross-sectional length of (a).
7. The blackboard lamp lens of claim 1, wherein the side a light emitting surface c1And a side light-emitting surface c of the B side surface3Are all cambered surfaces, and the side surface A is provided with a light-emitting surface c1The chord plane of the cylinder has an acute angle with the reference plane e smaller than that of the side BLight emitting surface c3The chord plane and the reference plane e form an acute angle, and the side surface A has a light-emitting surface c1Is less than the length of the section of the light emergent surface c of the side surface B3Cross-sectional length of (a).
8. The blackboard lamp lens of claim 1, wherein the upper light exit surface c4And a lower light emitting surface c5Are all plane and the upper light-emitting surface c4Is less than the light emitting surface c below5Cross-sectional length of (a).
9. The blackboard lamp lens of claim 1, wherein the A mounting structure d1And B mounting structure d2Are different in thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022989445.0U CN213746331U (en) | 2020-12-09 | 2020-12-09 | Blackboard lamp lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022989445.0U CN213746331U (en) | 2020-12-09 | 2020-12-09 | Blackboard lamp lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213746331U true CN213746331U (en) | 2021-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022989445.0U Active CN213746331U (en) | 2020-12-09 | 2020-12-09 | Blackboard lamp lens |
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| Country | Link |
|---|---|
| CN (1) | CN213746331U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112539361A (en) * | 2020-12-09 | 2021-03-23 | 长春希达电子技术有限公司 | High-uniformity blackboard lamp lens |
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2020
- 2020-12-09 CN CN202022989445.0U patent/CN213746331U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112539361A (en) * | 2020-12-09 | 2021-03-23 | 长春希达电子技术有限公司 | High-uniformity blackboard lamp lens |
| CN112539361B (en) * | 2020-12-09 | 2022-12-27 | 长春希达电子技术有限公司 | High-uniformity blackboard lamp lens |
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