CN118309962A - Blackboard lamp with anti-dazzle structure - Google Patents

Abstract

The present invention provides a blackboard lamp with an anti-glare structure, which includes a lamp body, an LED light board, and a plurality of lenses. The lamp body includes an outer shell and end covers arranged at both ends of the outer shell. The outer shell is provided with a light board fixing groove and a receiving cavity extending along the long side direction of the outer shell. The light board fixing groove is connected with the receiving cavity. An opening is arranged on the side of the receiving cavity away from the fixing groove. The LED light board is arranged in the light board fixing groove, and the LED light board is arranged toward the opening. A plurality of lenses are arranged in the receiving cavity. An anti-glare sheet is arranged between each two adjacent lenses, and the cross-sectional shape of the anti-glare sheet is consistent with the cross-sectional shape of the lens. An anti-glare sheet is arranged between adjacent lenses to divide the light beam generated by the LED light board, thereby improving the anti-glare ability of the lamp. The anti-glare sheet is sandwiched between the lenses, and the cross-sectional shapes of the two are consistent, so that the anti-glare sheet is hidden in the lenses, so that the lamp has an anti-glare effect and is thinner and lighter, which is conducive to reducing the manufacturing cost of the lamp.

Description

A blackboard lamp with anti-glare structure

Technical Field

The invention relates to the field of lighting, in particular to a blackboard lamp with an anti-glare structure.

Background technique

At night or in poor light conditions, blackboard lamps are needed to provide lighting so that students can see the contents of the blackboard. In the above usage scenarios, the role of the blackboard lamp is to illuminate the blackboard, and the students' eyes in the classroom are mainly focused on the blackboard. Therefore, the blackboard lamp should have good anti-glare capabilities.

Among them, setting an anti-glare component at the emission end of the light source is a common anti-glare method. However, this external anti-glare component will make the lamp larger and bulky; on the other hand, fixing the anti-glare component requires increasing the volume of the shell and requiring additional accessories to fix the anti-glare component, which increases the production cost of the lamp.

Summary of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a blackboard lamp with an anti-glare structure.

The objective of the present invention is achieved through the following technical solutions:

A blackboard lamp with an anti-glare structure, comprising: a lamp body, an LED lamp board, and a plurality of lenses;

The lamp body comprises a shell and end covers arranged at both ends of the shell, the shell is provided with a lamp board fixing groove and a receiving cavity extending along the long side direction of the shell, the lamp board fixing groove is communicated with the receiving cavity, an opening is arranged on a side of the receiving cavity away from the fixing groove, the LED lamp board is arranged in the lamp board fixing groove, and the LED lamp board is arranged toward the opening;

A plurality of lenses are arranged in the receiving cavity, an anti-glare sheet is arranged between every two adjacent lenses, and the cross-sectional shape of the anti-glare sheet is consistent with the cross-sectional shape of the lens.

In one embodiment, the anti-glare sheet is an aluminum sheet.

In one of the embodiments, the lamp body further comprises a protective cover, wherein the protective cover is provided with a protective plate and a fixing sleeve, wherein the protective plate is used to close the opening, and the fixing sleeve is connected to the end cover.

In one of the embodiments, a limiting portion is provided on the outer wall of the fixing sleeve, and the limiting portion is used to abut against the outer wall of the outer shell.

In one embodiment, a first limit strip and a second limit strip are provided on the outer shell, the first limit strip cooperates with the inner wall of the receiving cavity to form a first slide, the second limit strip cooperates with the inner wall of the receiving cavity to form a second slide, and a first anti-slip edge and a second anti-slip edge are provided on the outer wall of the lens, the first anti-slip edge is located in the first slide, and the second anti-slip edge is located in the second slide.

In one embodiment, the second limiting strip includes a plurality of anti-slipping units, the length of the anti-slipping unit is L1, the length of the lens is L2, the thickness of the anti-glare sheet is H, and L1=L2+H; the anti-slipping unit has a bending portion connected to the outer shell, a contact portion for pressing the second anti-slipping edge, and an elastic bending portion located between the bending portion and the contact portion.

In one embodiment, a reinforcing rib is provided between the bent portion and the opening.

In one of the embodiments, an inclined surface is provided on one end of the lens, and a guiding surface matching the inclined surface is provided on the anti-glare sheet.

In one embodiment, the lens has a positioning boss, the positioning boss is located on the edge of the inclined surface, and the positioning boss is inserted into the anti-glare sheet.

In one embodiment, the lamp body also includes a hanging arm, a special-shaped nut and a screw, the outer shell is provided with a slide groove matching the special-shaped nut, the hanging arm is provided with a flange, the screw passes through the flange, and the screw is threadedly connected to the special-shaped nut.

The above-mentioned blackboard lamp with anti-glare structure has the following advantages:

1. An anti-glare sheet is provided between adjacent lenses to split the light beam generated by the LED light panel, thereby improving the anti-glare ability of the lamp;

2. The anti-glare sheet is sandwiched between the lenses, and the cross-sectional shapes of the two are consistent, so that the anti-glare sheet is hidden in the lens. The lamp body does not need to reserve an additional installation position for the anti-glare sheet, making the lamp thinner while having an anti-glare effect. There is no need to set up separate fixing accessories for the anti-glare sheet, which is conducive to reducing the production cost of the lamp.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

FIG1 is a schematic structural diagram of a blackboard lamp with an anti-glare structure;

FIG2 is a schematic diagram of the disassembly of the lamp body;

FIG3 is a schematic cross-sectional view of a housing;

FIG4 is a cross-sectional schematic diagram of a blackboard lamp with an anti-glare structure;

FIG5 is a diagram showing the matching state of the housing and the lens (I);

FIG6 is a diagram showing the matching state of the housing and the lens (II);

FIG7 is a schematic diagram of the structure of a lens and an anti-glare sheet;

FIG. 8 is a schematic diagram showing the coordination of the lens and the anti-glare sheet.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and/or" used herein includes any and all combinations of one or more related listed items.

Please refer to FIG. 1 and FIG. 2 , the present invention provides a blackboard lamp 10 with an anti-glare structure, including: a lamp body 100 , an LED lamp board 200 , and a plurality of lenses 300 .

Please refer to Figures 1 and 3. The lamp body 100 includes an outer shell 110 and end covers 120 arranged at both ends of the outer shell 110. The outer shell 110 is a hollow structure. The outer shell 110 is provided with a lamp board fixing groove 111 and a receiving cavity 112 (the area shown by the dotted line in Figure 3) extending along the long side direction of the outer shell 110. The lamp board fixing groove 111 is connected to the receiving cavity 112. An opening 113 is provided on the side of the receiving cavity 112 away from the fixing groove. The LED lamp board 200 is arranged in the lamp board fixing groove 111, and the LED lamp board 200 is arranged toward the opening 113.

Please refer to FIG. 2 and FIG. 3 , a plurality of lenses 300 are arranged in the receiving cavity 112 , and an anti-glare sheet 400 is arranged between each two adjacent lenses 300 , and the cross-sectional shape of the anti-glare sheet 400 is consistent with the cross-sectional shape of the lens 300 (as shown in FIG. 7 ). That is, the lens 300 and the anti-glare sheet 400 are both located in the receiving cavity 112 , and the lens 300 and the anti-glare sheet 400 are arranged alternately, and the adjacent lenses 300 are separated by the anti-glare sheet 400 , so that the plurality of anti-glare sheets 400 form a grid-like anti-glare structure in the receiving cavity 112 , which can divide the light beam emitted by the LED light board 200 , effectively block and filter part of the strong light, reduce the reflection and glare effect of the light, and thus allow students to clearly see the information recorded on the blackboard.

It should be emphasized that the cross-sectional shape of the anti-glare sheet 400 is consistent with the cross-sectional shape of the lens 300, and the anti-glare sheet 400 and the lens 300 are actually alternately stacked in the receiving cavity 112 (as shown in FIG. 2 ), which is equivalent to the anti-glare structure being built into the lens 300, realizing the hidden installation of the anti-glare structure, which can effectively reduce the thickness of the lamp body 100, and is conducive to reducing the volume of the lamp body 100, making the blackboard lamp lighter and more beautiful in appearance. On the other hand, the hidden design of the anti-glare sheet 400 allows the anti-glare sheet 400 to be stacked with the lens 300, without the need to add additional fixing accessories for the anti-glare sheet 400, and at the same time, the anti-glare sheets 400 are not connected to each other, saving materials and reducing the production cost of the lamp. Among them, the anti-glare sheet 400 is made of commonly used anti-glare materials, such as: aluminum sheet, polyester fiber, black cardboard and other opaque materials.

The assembly method of the blackboard lamp 10 with an anti-glare structure is as follows:

First, one of the end caps 120 is fixed to the end of the housing 110;

Assemble the LED light board 200, the lens 300 and the anti-glare sheet on the side where the end cover 120 is not installed. Specifically, first insert the LED light board 200 into the light board fixing groove 111, so that the lamp beads on the LED light board 200 face the opening 113;

Next, the lens 300 is placed in the receiving cavity 112, and is slid along the receiving cavity 112 until it contacts the end cap 120. The anti-glare sheet 400 is placed in the receiving cavity 112, and is slid along the receiving cavity 112 until it contacts the lens 300. Then, the lens 300 is placed in the receiving cavity 112, and the lens 300 and the anti-glare sheet 400 are placed alternately in this way until the receiving cavity 112 is filled with the anti-glare sheet 400 and the lens 300. Other accessories (such as a distributor, a circuit board, etc.) inside the lamp are installed in the housing 110. Finally, the other end cap 120 is installed and the assembly is completed.

The above-mentioned blackboard lamp 10 with anti-glare structure has the following advantages:

1. An anti-glare sheet 400 is provided between adjacent lenses 300 to split the light beam generated by the LED light board 200, thereby improving the anti-glare capability of the lamp;

2. The anti-glare sheet 400 is sandwiched between adjacent lenses 300, and the cross-sectional shapes of the two are consistent, so that the anti-glare sheet 400 is hidden in the lens 300. The lamp body 100 does not need to reserve an additional installation position for the anti-glare sheet 400, so that the lamp has an anti-glare effect and is thinner and lighter. There is no need to set up a separate fixing accessory for the anti-glare sheet 400, which is beneficial to reducing the production cost of the lamp.

In one embodiment, referring to FIG. 5 and FIG. 6 , the lamp body 100 further includes a protective cover 130, the protective cover 130 is provided with a protective plate 131 and a fixing sleeve 132, the protective plate 131 covers the opening 113 for closing the opening 113, the fixing sleeve 132 is connected to the end cover 120, the end cover 120 and the fixing sleeve 132 are locked by screws, after the screws are loosened, the protective plate 131 can be moved to rotate around the connection position between the end cover 120 and the fixing sleeve 132, thereby adjusting the angle of the protective plate 131. Among them, a limiting portion 133 is provided on the outer wall of the fixing sleeve 132, and the limiting portion 133 is used to limit the rotation angle of the protective plate 131. When the limiting portion 133 abuts against the outer wall of the housing 110 (as shown in FIG. 5 ), the protective plate 131 cannot continue to rotate, so as to avoid the protective plate 131 being misoperated into the receiving cavity 112 during the assembly of the lamp, resulting in failure to properly install the lens 300 and the anti-glare sheet 400.

Please refer to FIG. 3 and FIG. 4. In order to make the assembly process of the lens 300 and the anti-glare sheet 400 easier, the housing 110 is provided with a first limiting strip 114 and a second limiting strip 115. The first limiting strip 114 cooperates with the inner wall of the receiving cavity 112 to form a first slideway 11, and the second limiting strip 115 cooperates with the inner wall of the receiving cavity 112 to form a second slideway 12. The outer wall of the lens 300 is provided with a first anti-slip edge 310 and a second anti-slip edge 320. When assembling, the first anti-slip edge 310 on the lens 300 is provided with a second anti-slip edge 320. 10 is aligned with the first slide 11, and the second anti-slip edge 320 is aligned with the second slide 12. After the lens 300 is placed in the accommodating cavity 112, the lens 300 can slide along the extension direction of the accommodating cavity 112, and the first anti-slip edge 310 is located in the first slide 11, and the second anti-slip edge 320 is located in the second slide 12. While providing guidance for the sliding of the lens 300, it can limit the lens 300 to prevent jamming during the sliding process, and avoid the fixed angle of the lens 300 from shifting.

It needs to be emphasized again that the cross-sectional shape of the anti-glare sheet 400 is consistent with the cross-sectional shape of the lens 300, that is, the anti-glare sheet 400 is also provided with a structure consistent with the shape of the first anti-slip edge 310 and the second anti-slip edge 320. As shown in Figure 7, the outer wall of the anti-glare sheet 400 is provided with a third anti-slip edge 420 and a fourth anti-slip edge 430 (as shown in Figure 7). After the anti-glare sheet 400 is assembled into the accommodating cavity 112, the third anti-slip edge 420 is located in the first slide 11, and the fourth anti-slip edge 430 is located in the second slide 12. The functions of the third anti-slip edge 420 and the fourth anti-slip edge 430 are the same as those of the first anti-slip edge 310 and the second anti-slip edge 320, which are used to guide the anti-glare sheet 400 to slide and prevent it from deviating.

It should be noted that in the blackboard lamp disclosed in the present invention, the lens 300 and the anti-glare sheet 400 are multiple unconnected monomers, which are alternately stacked in the receiving cavity 112. After the lamp is assembled, it is necessary to power on and test whether the LED light board 200 is normally lit and whether the lighting effect is qualified. Among them, since the process of installing the lens 300 into the receiving cavity 112 involves sliding, there is a probability of scratching the housing 110 during the assembly process. Therefore, the lens 300 may be scratched during the assembly process or have other defects that cannot be directly observed in appearance, resulting in a decrease in the light transmittance at the defective position or even a clear shadow when projected onto the blackboard. Therefore, it is necessary to remove the defective lens 300. When the defective lens 300 is located at the end position of the housing 110, it can be quickly removed by removing the end cover 120. However, if the defective lens 300 is located at the center of the housing 110, then after removing the end cover 120, it is necessary to first remove the other lenses 300 and the anti-glare sheet 400 pressing on the lens 300 before removing the target lens 300. The rework process requires the removal of other non-defective lenses 300, which affects the rework efficiency. On the other hand, the removed lens 300 needs to be reinstalled in place, and the removal and reinstallation processes will increase the risk of the lens 300 being scratched.

To solve the above problem, please refer to Figures 2 and 5. The second limiting strip 115 includes multiple anti-slip units 20. The length of the anti-slip unit 20 is L1, the length of the lens 300 is L2, the thickness of the anti-glare sheet 400 is H, and L1=L2+H; the anti-slip unit 20 has a bending portion 21 connected to the outer shell 110, a contact portion 22 for pressing the second anti-slip edge 320, and an elastic bending portion 23 located between the bending portion 21 and the contact portion 22.

Preferably, a reinforcing rib 116 is provided between the curved portion 21 and the opening 113 .

Further, please refer to Figure 8, an inclined surface 330 is provided on one end of the lens 300, and a guiding surface 410 matching the inclined surface 330 is provided on the anti-glare sheet 400. The lens 300 has a positioning boss 340, which is located on the edge of the inclined surface 330 and is inserted into the anti-glare sheet 400.

The second limit strip 115 and the housing 110 are integrally formed, a gap is provided between adjacent anti-slipping units 20, and each anti-slipping unit 20 is integrally formed with the housing 110, the portion where the anti-slipping unit 20 is connected to the housing 110 is a curved portion 21, and when no external force is applied, the contact portion 22 and the inner wall of the receiving cavity 112 together form the second slideway 12. After the lens 300 is loaded into the receiving cavity 112, the second anti-slipping edge 320 abuts against the contact portion 22 under the action of gravity.

After the position of the defective lens 300 is confirmed through detection, it is only necessary to loosen the screws connected to the protective cover 130 and move the protective plate 131 to flip the protective plate 131 toward the side away from the opening 113 to expose the lens 300 (as shown in FIG. 6 ).

Next, confirm the anti-detachment monomer 20 that the target lens 300 contacts, apply force to press the contact portion 22 on the anti-detachment monomer 20, bend the elastic bending portion 23, push the contact portion 22 toward the bending portion 21, and then make the contact portion 22 staggered with the second anti-detachment edge 320 (as shown in Figure 6).

The second anti-slip edge 320 on the target lens 300 loses its limit, and the lens 300 tilts toward the side where the second anti-slip edge 320 is located under the action of its own gravity. At this time, the lens 300 can be flipped by simply moving the second anti-slip edge 320 in a direction away from the opening 113, allowing the first anti-slip edge 310 to disengage from the first slide 11, and then the target lens 300 can be taken out.

When the target lens 300 is removed, an anti-glare sheet 400 affixed to the upper inclined surface 330 thereof will also be taken out, ensuring that there is only one anti-glare sheet 400 between two adjacent lenses 300. Finally, the end cap 120 is opened, and a new lens 300 and anti-glare sheet 400 are loaded on the side where the end cap 120 is located.

It should be emphasized that there is a gap between adjacent anti-slipping monomers 20, and each anti-slipping monomer 20 contacts and supports the second anti-slipping edge 320 on a lens 300. After confirming the position of the defective lens 300, the anti-slipping monomer 20 in contact with the lens 300 can be directly pressed to make the upper contact portion 22 staggered with the second anti-slipping edge 320 of the lens 300, thereby releasing the lock on the second anti-slipping edge 320. Among them, the present invention is to lock the lens 300 in the receiving cavity 112 by limiting the first anti-slipping edge 310 and the second anti-slipping edge 320 at the same time. When the second anti-slipping edge 320 is staggered with the contact portion 22, there is no other component on the side of the second anti-slipping edge 320 to limit the movement of the lens 300, so the lock on the lens 300 is also released, thereby achieving the purpose of quickly removing the defective lens 300.

The structural improvement of the second anti-slip edge 320 has the following advantages:

1. The defective lens 300 can be quickly taken out from the receiving chamber 112 alone without disassembling other components. The process of taking out the defective lens 300 only requires pressing the anti-detachment monomer 20 and moving the lens 300. The operation is simple and convenient, which reduces the parts that need to be disassembled and assembled during the rework process and greatly improves the rework efficiency of the blackboard lamp.

2. The process of picking out defective lenses 300 does not require disassembling other lenses 300 around them, which improves the efficiency of disassembling defective lenses 300 on the one hand, and avoids the wear of other lenses 300 during the disassembly and assembly process on the other hand.

3. An inclined structure (inclined surface 330 and guide surface 410) is provided at the contact portion between the lens 300 and the adjacent anti-glare sheet 400, thereby increasing the contact area, thereby increasing the friction between the lens 300 and the anti-glare sheet 400, making it less likely to be misaligned, and when the lens 300 contacts the anti-glare sheet 400, the positioning boss 340 is embedded in the anti-glare sheet 400, so that the lens 300 and the anti-glare sheet 400 remain flush; on the other hand, due to the presence of the inclined structure and the positioning boss 340, an anti-glare sheet 400 adjacent to the defective lens 300 (on the side where the inclined surface 330 is located) can be removed together with the anti-glare sheet 400, without the need for additional operations to remove the anti-glare sheet 400, thereby ensuring that only a single anti-glare sheet 400 is present between adjacent lenses 300.

Please refer to FIG. 4 . In one embodiment, the lamp body 100 further includes a suspension arm 140, a special-shaped nut 150 and a screw 160. The housing 110 is provided with a slide groove 117 matching the special-shaped nut 150. The suspension arm 140 is provided with a flange 141. The screw 160 passes through the flange 141 and the screw 160 is threadedly connected with the special-shaped nut 150. The suspension arm 140 is fixed on the ceiling and connected with the housing 110 through the flange 141, the screw 160 and the special-shaped nut 150, so as to suspend the blackboard lamp above the blackboard. The special-shaped nut 150 can slide in the slide groove 117. The position of the suspension arm 140 can be flexibly adjusted according to the actual situation to meet the installation requirements of different environments.

The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims (10)

1. A blackboard lamp with an anti-glare structure, characterized by comprising: a lamp body, an LED light board, and a plurality of lenses; The lamp body comprises a shell and end covers arranged at both ends of the shell, the shell is provided with a lamp board fixing groove and a receiving cavity extending along the long side direction of the shell, the lamp board fixing groove is communicated with the receiving cavity, an opening is arranged on a side of the receiving cavity away from the fixing groove, the LED lamp board is arranged in the lamp board fixing groove, and the LED lamp board is arranged toward the opening; A plurality of lenses are arranged in the receiving cavity, an anti-glare sheet is arranged between every two adjacent lenses, and the cross-sectional shape of the anti-glare sheet is consistent with the cross-sectional shape of the lenses. 2. The blackboard lamp with an anti-glare structure according to claim 1, characterized in that the anti-glare sheet is an aluminum sheet. 3. The blackboard lamp with an anti-glare structure according to claim 1 is characterized in that the lamp body also includes a protective cover, the protective cover is provided with a guard plate and a fixing sleeve, the guard plate is used to close the opening, and the fixing sleeve is connected to the end cover. 4. The blackboard lamp with an anti-glare structure according to claim 3, characterized in that a limiting portion is provided on the outer wall of the fixing sleeve, and the limiting portion is used to abut against the outer wall of the outer shell. 5. The blackboard lamp with an anti-glare structure according to claim 1 is characterized in that a first limit strip and a second limit strip are provided on the outer shell, the first limit strip cooperates with the inner wall of the receiving cavity to form a first slide, the second limit strip cooperates with the inner wall of the receiving cavity to form a second slide, and a first anti-slip edge and a second anti-slip edge are provided on the outer wall of the lens, the first anti-slip edge is located in the first slide, and the second anti-slip edge is located in the second slide. 6. The blackboard lamp with an anti-glare structure according to claim 5, characterized in that the second limiting strip comprises a plurality of anti-detachment monomers, the length of the anti-detachment monomers is L1, the length of the lens is L2, the thickness of the anti-glare sheet is H, and L1=L2+H; The anti-slipping monomer comprises a bending portion connected to the housing, a contact portion for pressing the second anti-slipping edge, and an elastic bending portion located between the bending portion and the contact portion. 7. The blackboard lamp with an anti-glare structure according to claim 6, characterized in that a reinforcing rib is provided between the curved portion and the opening. 8. The blackboard lamp with an anti-glare structure according to claim 6, characterized in that an inclined surface is provided on one end of the lens, and a guiding surface matching the inclined surface is provided on the anti-glare sheet. 9. The blackboard lamp with an anti-glare structure according to claim 8, characterized in that the lens has a positioning boss, the positioning boss is located on the edge of the inclined surface, and the positioning boss is inserted into the anti-glare sheet. 10. The blackboard lamp with an anti-glare structure according to claim 1 is characterized in that the lamp body also includes a hanging arm, a special-shaped nut and a screw, the outer shell is provided with a slide groove matching the special-shaped nut, the hanging arm is provided with a flange, the screw passes through the flange, and the screw is threadedly connected to the special-shaped nut.