CN210069753U

CN210069753U - Blackboard lamp

Info

Publication number: CN210069753U
Application number: CN201921323419.5U
Authority: CN
Inventors: 郑进琪
Original assignee: XIAMEN NONTON OPTIC-ELECTRIC Co Ltd
Current assignee: XIAMEN NONTON OPTIC-ELECTRIC Co Ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2020-02-14
Anticipated expiration: 2029-08-15

Abstract

The utility model relates to a blackboard lamp, which comprises an installation bracket, a power adapter and a strip-shaped lamp body, the mounting bracket is used for being mounted on a wall above the blackboard, the power adapter and the lamp body are fixedly mounted on the mounting bracket, the lamp body comprises a long chute-shaped shell, a strip-shaped LED light source plate, a plurality of lenses, a plurality of curved surface light reflecting sheets and a plurality of light spreading plates, wherein the strip-shaped LED light source plate, the lenses, the curved surface light reflecting sheets and the light spreading plates are arranged on the shell, the power adapter is used for supplying power to the strip-shaped LED light source plate, a plurality of LED lamp beads which are evenly spaced along the length direction are arranged on the LED light source plate, the LED lamp beads are in one-to-one correspondence with the lens, the curved surface reflector and the light spreading plate, and the LED lamp beads, the lens, the curved surface reflector and the light spreading plate are constructed to enable light emitted by the LED lamp beads to pass through the lens, the curved surface reflector and the light spreading plate in sequence and to be uniformly irradiated on the blackboard.

Description

Blackboard lamp

Technical Field

The utility model relates to a lamps and lanterns field specifically relates to a 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 generally only uses two fluorescent tubes, the fluorescent tubes are arranged above the blackboard and are positioned in the same plane with the blackboard, the blackboard lamp is closer to the upper part of the blackboard and farther from the lower part of the blackboard, so that the illumination on the surface of the blackboard from top to bottom is gradually attenuated, and the blackboard lamp has the defects of poor direction controllability and low light utilization rate.

Chinese patent application CN109780471A discloses a blackboard lamp, which comprises: the lamp comprises a lamp shell, a light source assembly and an end cover, wherein the lamp shell comprises a hoisting base plate, a first assembling plate and a second assembling plate, the first assembling plate and the second assembling plate are connected with the hoisting base plate, the first assembling plate is provided with a first chute, the second assembling plate is provided with a second chute, and the first chute and the second chute form a light source base plate assembling groove which is obliquely arranged relative to the hoisting base plate; the light source component is accommodated in the light source substrate assembly groove; the end covers are arranged at two ends of the lamp shell in the length direction and used for sealing the light source substrate assembling groove. However, the light emitted from the blackboard lamp is directly irradiated on the blackboard, and the problem that the illuminance at each position on the blackboard is not uniform exists.

Disclosure of Invention

The utility model aims at providing a blackboard lamp to solve above-mentioned problem. Therefore, the utility model discloses a specific technical scheme as follows:

a blackboard lamp comprises a mounting bracket, a power adapter and a strip-shaped lamp body, wherein the mounting bracket is used for being mounted on a wall above a blackboard, the power adapter and the lamp body are fixedly arranged on the mounting bracket, the lamp body comprises a long chute-shaped shell, a strip-shaped LED light source plate, a plurality of lenses, a plurality of curved surface reflecting sheets and a plurality of light spreading plates, the strip-shaped LED light source plate, the lenses, the curved surface reflecting sheets and the light spreading plates are arranged on the shell, the power adapter is used for supplying power to the strip-shaped LED light source plate, a plurality of LED lamp beads which are evenly spaced along the length direction are arranged on the LED light source plate, the LED lamp beads are in one-to-one correspondence with the lens, the curved surface reflector and the light spreading plate, and the LED lamp beads, the lens, the curved surface reflector and the light spreading plate are constructed to enable light emitted by the LED lamp beads to pass through the lens, the curved surface reflector and the light spreading plate in sequence and to be uniformly irradiated on the blackboard.

Furthermore, the light reflecting surface of the curved surface light reflecting sheet comprises a section of concave arc surface, a section of convex arc surface and a section of inclined surface which are sequentially connected from top to bottom, the length of the section of concave arc surface is increased progressively, and the curvature of the concave arc surface is smaller than that of the convex arc surface.

Furthermore, the light spreading plate is obliquely arranged and is parallel to the main optical axis of the lens, and the lower end of the light spreading plate is in contact with the lower end of the reflecting surface of the curved reflecting piece.

Furthermore, one surface of the light spreading plate facing the curved surface reflector is wavy.

Furthermore, every two lenses are arranged on one lens mounting bracket, and every two curved reflectors and the light spreading plate are separated by one grating seat. The arrangement mode is beneficial to manufacturing and installation, and the manufacturing cost is saved.

Further, the mounting bracket comprises a base and a supporting tube fixed on the base, the power adapter is fixedly mounted on the supporting tube, and a power line between the power adapter and the strip-shaped LED light source plate is arranged in the supporting tube.

The utility model adopts the above technical scheme, the beneficial effect who has is: the utility model discloses a blackboard lamp is through setting up curved surface reflector panel and exhibition worn-out fur for blackboard illuminance is even, plays the effect of protection eyes vision.

Drawings

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

FIG. 1 is a perspective view of a blackboard lamp of the present invention;

FIG. 2 is an exploded view of the blackboard lamp shown in FIG. 1;

fig. 3 is a sectional view of the blackboard lamp shown in fig. 1, and shows an optical schematic.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 1 to 3, a blackboard lamp includes a mounting bracket 1, a power adapter 2, and an elongated lamp body 3. The mounting bracket 1 is used for being mounted on a wall above a blackboard. The power adapter 2 and the lamp body 3 are fixedly arranged on the mounting bracket 1 to form a T shape. The mounting bracket 1 includes a base 11 and a support pipe 12 fixed to the base 11. The base 11 and support tube 12 may be made of aluminum or an aluminum alloy. The base 11 is square and can be fixed on the wall by screws. Preferably, the support tube 12 is a rectangular or square tube. The power adapter 2 is fixedly mounted on the support tube 12, and a power cord (not shown) between the power adapter and the LED light source board 32 of the lamp body 3 is arranged in the support tube 12. The lamp body 3 is fixed to the end of the support tube 12. Therefore, the support tube 12 plays a role of supporting the lamp body 3 on one hand, and plays a role of a wiring groove on the other hand, so that the electric wire is prevented from leaking outwards, and the whole blackboard lamp is more attractive. The power adapter 2 is used to supply power to the LED light source board 32, and its structure is well known and will not be described here.

The lamp body 3 includes a long chute-shaped housing 31, and a long strip-shaped LED light source board 32, a plurality of lenses 33, a plurality of curved reflectors 34, and a plurality of light spreading boards 35 mounted on the housing 31. The housing 31 may be made of an aluminum material, and various mounting grooves are formed thereon to facilitate mounting of the LED light source panel 32, the plurality of lenses 33, the plurality of curved reflectors 34, and the plurality of light spreading panels 35. The housing 31 has an inclined light outlet which faces the blackboard when attached. A plurality of LED beads 321 uniformly spaced along the length direction are disposed on the LED light source board 32. Preferably, the substrate of the LED light source board 32 is an aluminum substrate, so as to dissipate heat. In a specific embodiment, the number of the LED beads 321 is 12. In this case, the length of the blackboard lamp is 2 meters. The LED lamp beads 321 correspond to the lens 33, the curved surface reflector 34 and the light spreading plate 35 one to one, that is, each LED lamp bead 321 is provided with one lens 33, one curved surface reflector 34 and one light spreading plate 35. Lens 33 is sleeved on LED lamp bead 321, and LED lamp bead 321 is located on the main optical axis of lens 33. Preferably, the LED lamp bead 321 is located at the focus of the lens 33, so that the light emitted from the LED lamp bead 321 becomes parallel after passing through the lens 33. The LED lamp beads 321, the lens 33, the curved reflector 34 and the light spreading plate 35 are configured such that light emitted from the LED lamp beads 321 passes through the lens 33, the curved reflector 34 and the light spreading plate 35 in sequence and is uniformly irradiated on the blackboard. The positional relationship and the optical path therebetween are shown in fig. 3.

In the present embodiment, as shown in fig. 2 and 3, the light-reflecting surface of the curved reflector 34 includes a concave arc surface 341, a convex arc surface 342, and an inclined surface 343, which are sequentially connected from top to bottom, and the lengths of the concave arc surface 341, the convex arc surface 342, and the inclined surface 343 are gradually increased, that is, the length of the concave arc surface 341 is the smallest, and the length of the inclined surface 343 is the largest. Also, the curvature of the concave arc surface 341 is smaller than that of the convex arc surface 342. It should be understood that specific values of the lengths of the concave arc 341, the convex arc 342, and the inclined surface 343 and the curvatures of the concave arc 341 and the convex arc 342 are calculated by those skilled in the art according to optical formulas.

The light spreading plate 35 is disposed obliquely in parallel with the main optical axis of the lens 33, and the lower end thereof is in contact with the lower end of the light reflecting surface of the curved reflector 34. Therefore, the light reflected by the curved reflective sheet 34 is expanded in horizontal angle by the light spreading plate 35 and then irradiated onto the blackboard, so that the illuminance of the blackboard is kept at the optimum value.

In one embodiment, the light extending plate 35 is made of a light transmissive material and has a wavy shape on a side facing the curved reflector 34.

In the present embodiment, as shown in fig. 2, every two lenses 33 are mounted on one lens mounting bracket 36, i.e., the lens mounting bracket 36 has two lens mounting holes. And, every two curved reflectors 34 and the light spreading plate 35 are spaced apart by a grid seat 37. The grating seat 37 has two light-transmitting openings 371, and the size and shape of the light-transmitting openings 371 are substantially identical to those of the light spreading plate 35. The arrangement mode is beneficial to manufacturing and installation, and the manufacturing cost is saved.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A blackboard lamp is characterized in that: including installing support, power adapter and rectangular shape lamp body, the installing support is used for installing on the wall of blackboard top, power adapter and lamp body fixed mounting are in on the installing support, the lamp body includes long chute form casing and installs rectangular shape LED light source board, a plurality of lens, a plurality of curved surface reflector panel and a plurality of exhibition worn-out fur on the casing, power adapter is used for giving LED light source board power supply, arrange a plurality of LED lamp pearls that evenly separate along length direction on the LED light source board, LED lamp pearl and lens, curved surface reflector panel and exhibition worn-out fur one-to-one, and be located on the primary optical axis of lens, LED lamp pearl, lens, curved surface reflector panel and exhibition worn-out fur construct and make the light that LED lamp pearl sent loop through lens, curved surface reflector panel and exhibition worn-out fur and evenly shine on the blackboard.

2. The blackboard lamp as claimed in claim 1, wherein the reflecting surface of the curved reflecting plate includes a section of concave arc surface, a section of convex arc surface and a section of slope surface which are sequentially connected from top to bottom, the lengths thereof are increased progressively, and the curvature of the concave arc surface is smaller than that of the convex arc surface.

3. The blackboard lamp according to claim 2, wherein the light spreading plate is inclined parallel to the main optical axis of the lens and has a lower end contacting the lower end of the light reflecting surface of the curved reflector.

4. The blackboard lamp according to any of the claims 1 to 3, characterised in that the side of the light spreading plate facing the curved reflector is undulated.

5. The blackboard light of claim 4, wherein every two lenses are mounted on a lens mounting bracket, and every two curved reflectors and the light spreading plate are separated by a grill mount.

6. The blackboard lamp according to claim 1, wherein the mounting bracket includes a base and a support tube fixed on the base, the power adapter is fixedly mounted on the support tube, and the power line between the power adapter and the LED light source board is arranged in the support tube.