CN207569800U - Blackboard lights lens - Google Patents

Abstract

The utility model relates to the technical field of lighting, and discloses a blackboard lamp lens, which includes a polarized lens and a light source assembly. The total reflection surface, the incident refraction surface, the exit refraction surface and the total reflection surface are arc-shaped surfaces. The incident refraction surface is provided with a light source cavity. The refracting surface includes a first arc-shaped surface protruding toward the direction of the light source, a second arc-shaped surface and a third arc-shaped surface located on both sides of the light source, the second arc-shaped surface and the third arc-shaped surface are arc-shaped surfaces and are aligned with the The first subarc surface forms an included angle, the outgoing refraction surface of the lens includes the first subsurface and the second subsurface on the left and right sides, and the total reflection surface includes the first side reflection surface and the second measurement reflection surface. The utility model has brightness average The beneficial effects of high value, strong direction controllability, and high light utilization rate.

Description

blackboard light lens

technical field

The utility model relates to the technical field of lighting, in particular to a blackboard lamp lens.

Background technique

Blackboards play an important role in school educational institutions for teachers to write teaching content. The use environment of the blackboard is complex and diverse. It is often necessary to use a blackboard light to increase the brightness of the blackboard in a poorly lit environment. Viewer's visual fatigue. Traditional blackboard lamps generally only use two fluorescent tubes, and the blackboard lamps are installed obliquely above the blackboard. The blackboard lamps are closer to the top of the blackboard and farther to the bottom of the blackboard. It is dark, and the average illuminance on the surface of the blackboard is low, which makes the existing blackboard lamps have the disadvantages of poor illuminance uniformity, weak direction controllability and relatively low light utilization efficiency. For example: Chinese Patent Authorization Publication No. CN 206093778 U, authorized announcement date April 12, 2017, the name of the invention is a blackboard lamp with soft light, including a lamp housing and a lamp holder located on one side of the lamp housing. The disadvantage is that the device changes the original strong light into weak light through multiple lenses and reflectors and emits it. The average brightness of the surface of the blackboard is low, the uniformity of illumination is poor, the direction controllability is not strong, and the light utilization rate is relatively low. Low.

Utility model content

In order to solve the problems of low brightness average value, poor illuminance uniformity, weak direction controllability and relatively low light utilization rate in the prior art, the utility model provides a lighting system with high brightness average value and strong direction controllability. , Blackboard light lens with high light utilization rate.

To achieve the above object, the present invention adopts the following technical solutions:

A blackboard lamp lens, including a polarized lens and a light source assembly, the polarized lens includes an incident refraction surface on the back, an outgoing refraction surface on the front, and a total reflection curved surface for connecting the incident refraction surface and the outgoing refraction surface, the incident refraction surface , the outgoing refraction surface and the total reflection curved surface are arc-shaped surfaces, the incident refraction surface is provided with a light source cavity, the light source assembly includes a back light source board and a front light source, the light source is placed in the light source cavity, the The incident and refracting surfaces include a first arcuate surface protruding toward the light source, a second arcuate surface and a third arcuate surface located on both sides of the light source, the second arcuate surface and the third arcuate surface are arcuate surfaces And all form an included angle with the first subarc surface, the outgoing refraction surface of the lens includes the first subsurface and the second subsurface on the left and right sides, and the total reflection curved surface includes the first side reflective curved surface and the second side reflective curved surface , the first side reflective curved surface connects the third arc-shaped surface and the first sub-surface, and the second side reflective curved surface connects the second arc-shaped surface and the second sub-surface. The polarizing lens is set facing away from the light source component, and deflects the light emitted by the light source, so that the light is projected onto the facade to form a uniform spot. The light source component includes a light source board and a light source. Surface, the curved surface includes a first arc-shaped surface convex facing the direction of the light source, a second arc-shaped surface and a third arc-shaped surface located on both sides of the light source, the light emitted by the light source enters the lens through this curved surface, the second arc-shaped surface and the third arc-shaped surface The third arc-shaped surface is an arc surface, and the included angle with the first sub-arc surface, the outgoing refraction surface contains two sub-surfaces, which are the first sub-surface on the left side and the second sub-plane on the right side, total reflection The curved surface connects the incident refraction surface and the exit refraction surface. The total reflection surface reflects the light that passes through the curved surface and enters the inside of the lens, so that the light is emitted from the exit refraction surface and deflected towards the facade. The total reflection surface includes two side reflections Curved surface: the first side reflective curved surface and the second side reflective curved surface, the light emitted by the light source hits the incident refraction surface, part of the light enters the interior of the lens through the first arc surface refraction, and this part of the light enters the interior of the lens and passes through the exit refraction surface Refraction and deflection, irradiating the facade; the rest of the light enters the interior of the lens through the refraction of the second curved surface and the third curved surface, and hits the total reflection surface. The refraction surface is refracted and deflected to emit, and irradiates the facade to form a uniform light spot, which improves the average brightness, strengthens the controllability of the direction, and improves the light utilization rate.

Advantageously, said first and second facets have different curvatures. The curvature of the two facets is different, and the deflection angles for the light are different, so that the light is evenly distributed on the facade after being refracted by the exit refraction surface.

Preferably, the first side reflective curved surface and the second side reflective curved surface have different curvatures and different inclination angles, and the inclination angle of the second side reflective curved surface is smaller than the inclination angle of the first side reflective curved surface. By changing the curvature of the two side reflective surfaces, the brightness of the blackboard lamp is uniform and the light utilization rate is improved.

Preferably, the internal interval of the polarizing lens is provided with a truncated surface. The lens can be divided into different lengths through the truncated surface, which is convenient for adjustment, so that the lens can be adapted to different types of lamps.

Preferably, the total reflection surface has a bracket and a plane extending outward of the polarizing lens. The bracket is used to place the lens, and the plane is convenient to cooperate with the structure of the lamp to fix the lens.

Therefore, the blackboard lamp lens of the present invention has the following advantages: high brightness average value, strong direction controllability, and high light utilization rate.

Description of drawings

Figure 1 is a cross-sectional view of the lens.

Figure 2 is a cross-sectional light path diagram of the lens.

Figure 3 is a perspective view of the lens.

Figure 4 is a top view of the lens.

Figure 5 is a side view of the lens.

Among them: polarizing lens 1, light source cavity 2, light source assembly 3, facade 4, exit refraction surface 12, truncated surface 14, bracket 15, light source plate 31, light source 32, first arc surface 111, second arc surface 112 , the third curved surface 113 , the first subsurface 121 , the second subsurface 122 , the first side reflective curved surface 131 , the second side reflective curved surface 132 , and the plane 151 .

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

As shown in Figures 1, 2, 3, 4, and 5, blackboard lamp lenses, where:

A blackboard lamp lens, including a polarizing lens 1 and a light source assembly 3, the polarizing lens 1 includes an incident refraction surface 11 on the back, an exit refraction surface 12 on the front, and a total reflection curved surface 13 for connecting the incident refraction surface 11 and the exit refraction surface 12 , the incident refraction surface 11, the exit refraction surface 12 and the total reflection curved surface 13 are arc-shaped surfaces, the incident refraction surface 11 is provided with a light source cavity 2, and the light source assembly 3 includes a back light source plate 31 and a front light source 32, so The light source 32 is placed in the light source cavity 2, and the incident refraction surface 11 includes a first arc-shaped surface 111 protruding in the direction facing the light source 32, a second arc-shaped surface 112 and a third arc-shaped surface 113 located on both sides of the light source, the second The arc surface 112 and the third arc surface 113 are arc surfaces and both form an angle with the first sub-arc surface 111, and the lens exit refraction surface 12 includes the first sub-surface 121 and the second sub-surface 122 on the left and right sides, The total reflection curved surface 13 includes a first side reflective curved surface 131 and a second side reflective curved surface 132, the first side reflective curved surface 131 connects the third arc surface 113 and the first subsurface 121, and the second side reflective curved surface 132 connects the second arc surface face 112 and second facet 122 . The polarizing lens 1 is arranged facing away from the light source assembly 3, and deflects the light emitted by the light source 32, so that the light is projected onto the facade 4 to form a uniform light spot. The light source assembly 3 includes a light source board 31 and a light source 32, wherein the light source 32 is placed on the In the cavity 2, the curved surface 11 is the incident refraction surface of the lens, and the curved surface includes a first arc-shaped surface 111 protruding in the direction facing the light source 32, a second arc-shaped surface 112 and a third arc-shaped surface 113 located on both sides of the light source, and the light source 32 The light emitted enters the lens 1 through the curved surface 11, the second arc surface 112 and the third arc surface 113 are arc surfaces, and the included angle with the first sub-arc surface 111, the outgoing refraction surface 12 includes two sub-arc surfaces. Surfaces are respectively the first facet 121 on the left side and the second facet 122 on the right side. The total reflection curved surface 13 connects the incident refraction surface 11 and the exit refraction surface 12, and the total reflection curved surface 13 will pass through the arc surfaces 112 and 113 The light reflected inside the lens makes the light exit from the outgoing refracting surface 12 and deflect towards the facade 4. The total reflection surface 13 includes two side reflection surfaces: the first side reflection surface 131 and the second side reflection surface 132, and the light source The light emitted by 32 shoots to the incident refraction surface 11, and a part of the light enters the interior of the lens 1 after being refracted by the first arc surface 111. After this part of light enters the interior of the lens 1, it is refracted and deflected by the exit refraction surface 12, and irradiates on the facade 4 The rest of the light enters the inside of the lens 1 through the refraction of the second arc surface 112 and the third arc surface 113, and impinges on the total reflection curved surface 13. 12 Refraction and deflection are emitted, irradiating the facade 4 to form a uniform light spot, achieving an increase in the average brightness, enhancing direction controllability, and improving light utilization. The curvatures of the first facet 121 and the second facet 122 are different. The curvatures of the two facets are different, and the deflection angles for the light are different, so that the light is evenly distributed on the facade 4 after being refracted by the exit refraction surface 12 . The first side reflective curved surface 131 and the second side reflective curved surface 132 have different curvatures and different inclination angles, and the inclination angle of the second side reflective curved surface 132 is smaller than that of the first side reflective curved surface. By changing the curvature of the two side reflective surfaces, the brightness of the blackboard lamp is uniform and the light utilization rate is improved. A truncated surface 14 is provided at intervals inside the polarizing lens 1 . The lens 1 can be divided into different lengths through the truncated surface, which is convenient for adjustment and adapts the lens to different types of lamps. The total reflection surface 13 has a bracket 15 and a plane 151 extending toward the outside of the polarizing lens 1 . The bracket 15 is used to place the lens 1, and the plane 151 is convenient to cooperate with the structure of the lamp and fix the lens.

The blackboard lamp lens of the utility model has the beneficial effects of high brightness average value, strong direction controllability and high light utilization rate.

Claims (5)

1. a kind of blackboard lights lens, including spreadlight lens and light source assembly, it is characterized in that, the spreadlight lens includes entering for the back side Penetrate plane of refraction, positive outgoing plane of refraction, the total reflection curved surface for connecting incident plane of refraction and being emitted plane of refraction, the incidence Plane of refraction, outgoing plane of refraction and total reflection curved surface are arcwall face, and the incidence plane of refraction is equipped with light-source chamber, the light source group The light source board and positive light source, the light source of part including the back side are positioned in light-source chamber, the incidence plane of refraction include towards First arcwall face of light source direction protrusion, positioned at the second arcwall face of light source both sides and third arcwall face, second arcwall face It has angle with third arcwall face for arc surface and with first point of cambered surface, the lens outgoing plane of refraction includes the left and right sides First facet and the second facet, it is described total reflection curved surface include the first lateral reflection curved surface and the second side reflecting curved surface, described first Lateral reflection curved surface connects third arcwall face and the first facet, and the second side reflecting curved surface connects the second arcwall face and second point Face.

2. blackboard lights lens according to claim 1, it is characterized in that, the curvature of first facet and the second facet is not Together.

3. blackboard lights lens according to claim 1, it is characterized in that, the first lateral reflection curved surface and the second lateral reflection are bent Face curvature is different and angle of inclination is different, and the angle of inclination of the second side reflecting curved surface is less than inclining for the first lateral reflection curved surface Rake angle.

4. blackboard lights lens according to claim 1, it is characterized in that, the inside of the spreadlight lens, which is equipped at intervals with, to be blocked Face.

5. the blackboard lights lens according to claim 1 or 3, it is characterized in that, the fully reflecting surface is to spreadlight lens outside To being extended with stent and plane.