CN211694737U - Blackboard lamp polarizing lens and blackboard lamp - Google Patents
Blackboard lamp polarizing lens and blackboard lamp Download PDFInfo
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- CN211694737U CN211694737U CN202020033602.8U CN202020033602U CN211694737U CN 211694737 U CN211694737 U CN 211694737U CN 202020033602 U CN202020033602 U CN 202020033602U CN 211694737 U CN211694737 U CN 211694737U
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Abstract
The utility model discloses a blackboard lamp polarized lens, be in including first printing opacity portion and setting the second printing opacity portion on first printing opacity portion right side, first printing opacity portion is including the first plain noodles that forms in first printing opacity portion upper surface and forming in the first income plain noodles of first printing opacity portion right flank, first income plain noodles is suitable for to jet out light refraction extremely with the light source first go out the plain noodles by first play plain noodles jets out, and this blackboard lamp polarized lens can make full use of light source send light, avoids light to jet into simultaneously and causes the glare in the mr's eye, and the illuminance degree of consistency is high, and this application still discloses a blackboard lamp.
Description
Technical Field
The utility model relates to the technical field of lighting fixtures, especially, relate to a blackboard lamp polarizing lens and blackboard lamp.
Background
The blackboard is very common in teaching activities, and can be used by teachers to write teaching contents. When the blackboard is in some environments with poor light, the blackboard lamp is often used to increase the brightness of the blackboard.
The traditional blackboard lamp adopts a T8 lamp tube and a stainless steel or white painted light reflecting arc surface to reflect and project light to a blackboard area to achieve the purpose of illumination, but the T8 lamp tube is a 360-degree light emitting source, part of light emitted by the T8 lamp tube is directly emitted through a lamp outlet, and auxiliary light spots are generated, so that the T8 lamp tube cannot be fully utilized to emit light; in addition, because the light-reflecting arc surface of the blackboard lamp is usually a stainless steel surface arranged in an arc shape or an arc surface coated with white paint, the two arc surfaces belong to diffuse light-reflecting surfaces, when the light of the T8 light source irradiates the light-reflecting surface, the light-reflecting surface reflects the light towards all directions, and part of the light irradiates the eyes of a teacher on a platform, so that glare is caused to the teacher; in addition, the existing blackboard lamp is generally installed at the upper end of a blackboard, the light rays of the existing blackboard lamp shine from top to bottom, under the condition that a light source is not distributed with light, the lower part of the surface of the blackboard is much darker than the upper part, the illuminance uniformity is poor, and an observer (student) is easy to generate visual fatigue to cause myopia; and the lamp body is bigger than normal, influences the outward appearance, increases unnecessary cost: because the existing blackboard lamp generally adopts a lamp tube as a light source, the lamp tube has a certain size, and the size of the reflecting cover is added, the volume of the whole lamp body is larger, and the integral attractiveness is influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of prior art, one of the purposes of the utility model is to provide a blackboard lamp polarized lens, can make full use of light source send light, avoid light to jet into the teacher simultaneously and cause the glare in the eye, the illuminance degree of consistency is high.
The second purpose of the utility model is to provide a blackboard lamp, its whole is small, the installation of being convenient for.
The utility model discloses an one of the purpose adopts following technical scheme to realize:
a blackboard lamp polarized lens comprises a first light transmission part and a second light transmission part arranged on the right side of the first light transmission part, wherein the first light transmission part is a half TV lens divided by a TV lens along the optical axis direction, the second light transmission part is a half TIR lens divided by a TIR lens along the optical axis direction, the section of the first light transmission part is connected with the section of the second light transmission part and encloses a containing cavity, the first light transmission part comprises a first light emitting surface and a first light incident surface, and the first light incident surface is suitable for refracting light rays emitted by a light source to the first light emitting surface and emitting the light rays from the first light emitting surface;
the second light transmission part is provided with a second light incoming surface, a light reflecting surface and a second light outgoing surface, the first light incoming surface and the second light incoming surface are formed on the cavity wall of the containing cavity, the second light incoming surface is suitable for refracting light emitted by a light source to the light reflecting surface, and the light is reflected to the second light outgoing surface through the light reflecting surface and then emitted out through the second light outgoing surface.
Further, the cross-sectional curve profile of the light-reflecting surface conforms to the parabolic equation: x is the number of2＝4fy。
Further, when the first light emitting surface is a convex curved surface, the first light incident surface is a concave curved surface, when the first light emitting surface is a concave curved surface, the first light incident surface is a convex curved surface, when the second light emitting surface is a convex curved surface, the second light incident surface is a concave curved surface, and when the second light emitting surface is a concave curved surface, the second light incident surface is a convex curved surface.
Furthermore, the cross-sectional curve profiles of the first light emitting surface and the second light emitting surface are bezier free curves.
Further, the light source device further comprises a connecting part arranged between the first light transmission part and the second light transmission part, and the connecting part is smoothly connected with the first light transmission part and the second light transmission part.
Further, the second light-transmitting portion further includes a transition portion formed between the second light incident surface and the second light emitting surface.
Furthermore, the LED lamp also comprises a mounting part formed on the surfaces of the first light-transmitting part and the second light-transmitting part.
The second purpose of the utility model is realized by adopting the following technical scheme:
the utility model provides a blackboard lamp, includes above-mentioned blackboard lamp polarized lens, LED, mounting panel and support body, blackboard lamp polarized lens reaches LED install in on the mounting panel, blackboard lamp polarized lens with the mounting panel encloses into hold the chamber, LED install in hold the intracavity, and set up blackboard lamp polarized lens's center, the support body is provided with the installation cavity, the mounting panel install in the installation cavity.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the light emitted into the first light transmission part can be refracted to the upper part of the blackboard after being refracted twice through the first light incident surface and the first light emitting surface by utilizing the refraction principle of the lens and the Total Internal Reflection (TIR) principle, so that the light emitted into the second light transmission part can be irradiated to the lower part of the blackboard after being refracted twice and reflected once through the second light incident surface, the light reflecting surface and the second light emitting surface, the illumination uniformity is high, and the light emitted by the light source can be completely refracted to the blackboard through the first light transmission part and the second light transmission part because the light source is arranged in the accommodating cavity defined by the first light transmission part and the second light transmission part, so that the light emitted by the light source can be fully utilized, and the glare caused by the light emitted into eyes of a teacher can be effectively avoided; this application utilizes LED to replace original fluorescent tube, has effectively reduced the volume of blackboard lamp, has reduced the manufacturing cost of blackboard lamp simultaneously, and adopts LED more safety ring, and LED sets up simultaneously the focus position of reflector surface can reach the best collimated light effect, lets light reach the blackboard part down far away from the blackboard lamp, and the illuminance degree of consistency is good.
Drawings
Fig. 1 is a schematic structural view of a polarized lens of a blackboard lamp according to the present invention;
FIG. 2 is a schematic view of another angle of the polarized lens of the blackboard lamp according to the present invention;
FIG. 3 is a side view of a polarized lens of a blackboard lamp according to the present invention;
FIG. 4 is a diagram illustrating the state of the polarized lens of the blackboard lamp when in use;
FIG. 5 is a schematic structural view of a blackboard lamp of the present invention;
fig. 6 is a simulated diagram of a blackboard lamp of the present invention;
fig. 7 is a light distribution curve diagram of a blackboard lamp of the present invention.
The figure is as follows: 10. a first light-transmitting portion; 11. a first light incident surface; 12. a first light emitting surface; 20. a second light-transmitting portion; 21. a second light incident surface; 22. a light-reflecting surface; 23. a second light emitting surface; 24. an accommodating chamber; 30. an LED; 40. mounting a plate; 50. a shelf body.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
As shown in fig. 1-4, a blackboard lamp polarized lens includes a first light-transmitting portion 10 and a second light-transmitting portion 20 disposed on the right side of the first light-transmitting portion 10, where the first light-transmitting portion 10 is a half TV lens divided by a TV lens along an optical axis direction, the second light-transmitting portion 20 is a half TIR lens divided by a TIR lens along the optical axis direction, a cross section of the first light-transmitting portion 10 is connected with a cross section of the second light-transmitting portion 20 and encloses a containing cavity 24, the first light-transmitting portion 10 includes a first light-emitting surface 12 and a first light-entering surface 11, and the first light-entering surface 11 is adapted to refract light emitted from a light source to the first light-emitting surface 12 and emit the light from the first light-emitting surface 12;
the second light transmission portion 20 has a second light incident surface 21, a light reflecting surface 22 and a second light emitting surface 23, the first light incident surface 11 and the second light incident surface 21 are formed by the cavity wall of the accommodating cavity 24, the second light incident surface 21 is suitable for refracting the light emitted from the light source to the light reflecting surface 22, and the light is reflected to the second light emitting surface 23 by the light reflecting surface 22 and then emitted from the second light emitting surface 23. The shape of the TV lens can be found in the patent application No. 201821477087.1, and the shape of the TIR lens can be found in the patent application No. 201810442555X.
When the blackboard is in operation, part of light emitted by the light source is emitted into the first light transmission part 10 through the first light incident surface 11, is refracted to the first light emergent surface 12, is refracted to the upper part of the blackboard through the first light emergent surface 12, so as to illuminate the upper part of the blackboard, and the other part of light emitted by the light source is emitted into the second light transmission part 20 through the second light incident surface 21, is refracted to the light reflecting surface 22, is reflected to the second light emergent surface 23 through the light reflecting surface 22, and is emitted to the lower part of the blackboard through the second light emergent surface 23, so as to illuminate the lower part of the blackboard.
The light rays entering the first light transmission part 10 can be refracted to the upper part of the blackboard after being refracted twice through the first light incident surface 11 and the first light emergent surface 12 by utilizing the refraction principle of the lens, to illuminate the upper portion of the blackboard, using the refraction principle of the lens and the TIR principle of total internal reflection, so that the light rays incident into the second light-transmitting portion 20, after two refractions and one reflection of the second light incident surface 21, the light reflecting surface 22 and the second light emitting surface 23, so that the light refracted by the second light-emitting surface 23 can be irradiated to the lower part of the blackboard, the illuminance uniformity is high, and since the light source is disposed in the receiving cavity 24 enclosed by the first light-transmitting portion 10 and the second light-transmitting portion 20, the light emitted by the light source can be totally refracted to the blackboard through the first light-transmitting part 10 and the second light-transmitting part 20, so that the light emitted by the light source is fully utilized, and glare caused by the fact that the light is emitted into eyes of a teacher is effectively avoided.
Specifically, the cross-sectional curve profile of the reflective surface 22 conforms to the parabolic equation: x is the number of24fy, so as to intensively reflect the light incident from the second light incident surface 21 to the second light emitting surface 23 and emit the light from the second light emitting surface 23.
More specifically, the cross-sectional curve profiles of the first light emitting surface 12 and the second light emitting surface 23 are bezier free curves.
That is, when the first light emitting surface 12 is a convex curved surface, the first light incident surface 11 is a concave curved surface, when the first light emitting surface 12 is a concave curved surface, the first light incident surface 11 is a convex curved surface, when the second light emitting surface 23 is a convex curved surface, the second light incident surface 21 is a concave curved surface, and when the second light emitting surface 23 is a concave curved surface, the second light incident surface 21 is a convex curved surface.
In addition, this application still includes the connecting portion that sets up between first printing opacity portion 10 and second printing opacity portion 20, connecting portion and first printing opacity portion 10 and second printing opacity portion 20 smooth connection, and during the use, the part light that the light source sent will shine on the blackboard through connecting portion, and the light that is jetted out by the connecting portion will distribute between the facula that is formed by the light that first printing opacity portion 10 and second printing opacity portion 20 jetted out to make the light that is jetted out by this application lens can be evenly excessive, and the illuminance uniformity is high.
The second light transmission part 20 further includes a transition part formed between the second light incident surface 21 and the second light emitting surface 23, so that part of the light emitted from the second light transmission part 20 can be emitted through the transition part, and the light emitted from the lens of the present application can be further improved to be uniform and excessive, and the illuminance uniformity is high.
Further, the blackboard lamp further comprises a mounting part formed on the surfaces of the first light transmission part 10 and the second light transmission part 20, so that a user can conveniently mount the blackboard lamp on the blackboard lamp.
As shown in fig. 5, a blackboard lamp, including blackboard lamp polarized lens, LED30, mounting panel 40 and support body 50, blackboard lamp polarized lens and LED30 install on mounting panel 40, and blackboard lamp polarized lens encloses with mounting panel 40 and becomes to hold chamber 24, and LED30 installs in holding chamber 24, and sets up the focal position at reflective surface 22, and support body 50 is provided with the installation chamber, and mounting panel 40 installs in the installation chamber.
This application utilizes LED30 to replace original fluorescent tube, has effectively reduced the volume of blackboard lamp, has reduced the manufacturing cost of blackboard lamp simultaneously, and adopts LED30 more safe environmental protection, and LED30 sets up the focus position at reflector surface 22 simultaneously, can reach the best collimated light effect, lets light reach the blackboard part down far away from the blackboard lamp, and the illuminance degree of consistency is good.
FIG. 6 shows illuminance and illuminance uniformity data obtained after a blackboard lamp simulation experiment of the present application.
It can be clearly known from the figure that the illuminance and the illuminance uniformity are higher than the international standard after the blackboard lamp is used. The current national standard requires that the average illumination of the blackboard is more than 500LX, and the uniformity of the illumination is more than 0.8.
In order to ensure that the light energy irradiated by the blackboard lamp on the upper part of the blackboard is less and the requirement of short-distance projection is met during use, the light energy irradiated by the blackboard lamp on the lower part of the blackboard is more and the requirement of long-distance projection is met, and further the light energy of the lamp reaching the whole blackboard is uniform. Now, light distribution simulation is carried out on the lens, and after simulation is known from the position shown in figure 7, the lens meets the use standard.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (8)
1. A blackboard lamp polarized lens is characterized in that: the LED lamp comprises a first light transmission part and a second light transmission part arranged on the right side of the first light transmission part, wherein the first light transmission part is a half TV lens divided by a TV lens along the optical axis direction, the second light transmission part is a half TIR lens divided by a TIR lens along the optical axis direction, the cross section of the first light transmission part is connected with the cross section of the second light transmission part and encloses a containing cavity, the first light transmission part comprises a first light emitting surface and a first light incoming surface, and the first light incoming surface is suitable for refracting light rays emitted by a light source to the first light emitting surface and emitting the light rays from the first light emitting surface;
the second light transmission part is provided with a second light incoming surface, a light reflecting surface and a second light outgoing surface, the first light incoming surface and the second light incoming surface are formed on the cavity wall of the containing cavity, the second light incoming surface is suitable for refracting light emitted by a light source to the light reflecting surface, and the light is reflected to the second light outgoing surface through the light reflecting surface and then emitted out through the second light outgoing surface.
2. The blackboard lamp polarizing lens according to claim 1, wherein: the cross-sectional curve profile of the reflecting surface conforms to the parabolic equation: x is the number of2＝4fy。
3. The blackboard lamp polarizing lens according to claim 1, wherein: when the first light-emitting surface is a convex curved surface, the first light-incident surface is a concave curved surface, when the first light-emitting surface is a concave curved surface, the first light-incident surface is a convex curved surface, when the second light-emitting surface is a convex curved surface, the second light-incident surface is a concave curved surface, and when the second light-emitting surface is a concave curved surface, the second light-incident surface is a convex curved surface.
4. The blackboard lamp polarizing lens according to claim 3, wherein: the cross section curve profiles of the first light-emitting surface and the second light-emitting surface are Bezier free curves.
5. The blackboard lamp polarizing lens according to claim 1, wherein: the light source further comprises a connecting part arranged between the first light transmission part and the second light transmission part, and the connecting part is smoothly connected with the first light transmission part and the second light transmission part.
6. The blackboard lamp polarizing lens according to claim 1, wherein: the second light transmission part further comprises a transition part formed between the second light incident surface and the second light emergent surface.
7. The blackboard lamp polarizing lens according to claim 1, wherein: the LED lamp also comprises a mounting part formed on the surfaces of the first light-transmitting part and the second light-transmitting part.
8. A blackboard lamp is characterized in that: including any one of claims 1-7 blackboard lamp polarized lens, LED, mounting panel and support body, blackboard lamp polarized lens reach LED install in on the mounting panel, blackboard lamp polarized lens with the mounting panel encloses into hold the chamber, LED install in hold the intracavity, and set up and be in blackboard lamp polarized lens's center, the support body is provided with the installation cavity, the mounting panel install in the installation cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020033602.8U CN211694737U (en) | 2020-01-08 | 2020-01-08 | Blackboard lamp polarizing lens and blackboard lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020033602.8U CN211694737U (en) | 2020-01-08 | 2020-01-08 | Blackboard lamp polarizing lens and blackboard lamp |
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| Publication Number | Publication Date |
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| CN211694737U true CN211694737U (en) | 2020-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020033602.8U Active CN211694737U (en) | 2020-01-08 | 2020-01-08 | Blackboard lamp polarizing lens and blackboard lamp |
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| CN (1) | CN211694737U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902112A (en) * | 2021-02-24 | 2021-06-04 | 苏州欧普照明有限公司 | Lens and lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902112A (en) * | 2021-02-24 | 2021-06-04 | 苏州欧普照明有限公司 | Lens and lamp |
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