CN104456414A

CN104456414A - Lend

Info

Publication number: CN104456414A
Application number: CN201310430779.6A
Authority: CN
Inventors: 胡朝景; 王何立颖
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2013-09-22
Filing date: 2013-09-22
Publication date: 2015-03-25

Abstract

A lend comprises a light transmitting body and a reflector movably installed on the light transmitting body, wherein the light transmitting body is used for receiving light rays and adjusting the light rays, and the reflector is located in the light ray transmission path. Through adjustment or replacement of the reflector, the light emitting effect of the lens can be flexibly adjusted, and therefore production cost and manufacturing cost are reduced.

Description

Lens

Technical field

The present invention relates to a kind of lens, refer to a kind of lighting lens especially.

Background technology

Light emitting diode, as emerging light source, has been widely used in the middle of various uses, particularly as the backlight module of display.Existing backlight module is normally made up of multiple light emitting diode of arranging in array, and the light that each light emitting diode sends mutually mixes and illuminates display floater.But because the range of exposures of each light emitting diode is less, in order to the display floater larger to area throws light on, backlight module can use a large amount of light emitting diodes usually, thus causes holistic cost higher.Therefore, in order to reduce the usage quantity of light emitting diode, lens of usually light emitting diode being arranged in pairs or groups use.The light that light emitting diode sends can spread by lens, thus obtains illuminating effect in a big way.But existing lens are once after having manufactured, and the regulating power of its light is just fixed.Light emitting diode of arranging in pairs or groups if necessary produces different dimming effects, just must redesign and manufacture the lens made new advances, thus causing the increase of production cost.

Summary of the invention

Therefore, be necessary to provide a kind of lens changing dimming effect.

A kind of lens, the reflector comprising transparent body and be installed on movably in transparent body, transparent body is for receiving light and regulating light, and reflector is positioned at the propagation path of light.

Due to adopt the transparent body of moveable reflector and lens with the use of, when needing to obtain different dimming effects, only need adjust the position of reflector relative to transparent body, or reflector is removed from transparent body, then be replaced with the reflector that reflecting effect is different.Therefore, lens can change its dimming effect easily, thus reduce overall production and manufacturing cost.

With reference to the accompanying drawings, the invention will be further described in conjunction with specific embodiments.

Accompanying drawing explanation

Fig. 1 is the stereogram of the lens of one embodiment of the invention.

Fig. 2 is the inversion figure of the lens of Fig. 1.

Fig. 3 is the profile of lens along III-III hatching line of Fig. 1.

Fig. 4 is the light type figure of the lens of Fig. 1.

Main element symbol description

Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.

Detailed description of the invention

Refer to Fig. 1-3, show the lens 10 of one embodiment of the invention, it comprises a transparent body 20 and and is removably installed in reflector 30 in transparent body 20.

Transparent body 20 is one-body molded by transparent material, as epoxy resin, silica gel, glass etc.Transparent body 20 entirety is roughly rounded, and it comprises a bottom surface 22, and is formed at the side 28 that end face that incidence surface 24, in bottom surface 22 and bottom surface 22 be oppositely arranged 26 and is connected end face 26 and bottom surface 22.

The bottom surface 22 of transparent body 20 is rounded, upwards caves in and form a cavity 200 in the middle part of it.Cavity 200 is for accommodating the light source 40 of such as light emitting diode and so on.The internal face of cavity 200 is the incidence surface 24 of transparent body 20.In the present embodiment, incidence surface 24 is an ellipsoid, and its minor axis is positioned at bottom surface 22, and long axis normal is in bottom surface 22.The light that light source 40 sends enters in transparent body 20 through incidence surface 24.

The end face 26 of transparent body 20 is a free form surface, and it is made up of around the convex surface 264 of concave surface 262 concave surface 262 and one.Concave surface 262 is right against incidence surface 24, and its minimum point is alignd with incidence surface 24 peak.Convex surface 264 and concave surface 262 are smoothly connected.The bottom of convex surface 264 is lower than the peak of incidence surface 24.End face 26 is as the exiting surface of transparent body 20, and the overwhelming majority entered from incidence surface 24 in the light of transparent body 20 all penetrates outside transparent body 20 via end face 26.Further, light through end face 26 time by the concave surface 262 of end face 26 and convex surface 264 reflect and spread to periphery, thus with outside larger beam angle injection transparent body 20.

Side 28 is perpendicular to bottom surface 22 and be connected with end face 26.In the present embodiment, side 28 is an anchor ring, and it is connected with bottom the convex surface 264 of end face 26.Side 28 forms the structure of a ridge shape with the junction of convex surface 264, and in other words, side 28 is connected for rough with convex surface 264.The few part entered from incidence surface 24 in the light of transparent body 20 can penetrate outside transparent body 20 via side 28.Certainly, by controlling the incident condition of light or the shape of incidence surface 24, the light entering transparent body 20 from incidence surface 24 can be made substantially all to penetrate from end face 26, thus obtain desirable light-out effect.

Transparent body 20 also offers a perforation 202.Perforation 202 runs through transparent body 20 from concave surface 262 minimum point of end face 26 and extends to the peak of incidence surface 24.The bearing of trend of perforation 202 is perpendicular to bottom surface 22 and be parallel to the axis O of transparent body 20.In the present embodiment, the axis O of transparent body 20 is through perforation 202.

Reflector 30 comprises joint face 32 and the reflecting surface 34 be connected with joint face 32.Joint face 32 is a plane, and it is parallel to the bottom surface 22 of transparent body 20.Reflecting surface 34 is cambered surface convex, and its curvature is greater than the concave surface 262 of transparent body 20 and the curvature of convex surface 264.

Reflector 30 is suspended in the cavity 200 of transparent body 20 by a lifting rope 36.The lower end of lifting rope 36 and the joint face 32 of reflector 30 are fixed, and upper end is positioned at the concave surface 262 of transparent body 20 through the perforation 202 of transparent body 20.In order to prevent lifting rope 36 from coming off in perforation 202, the upper end of lifting rope 36 is also fixed with a block 38 further.The external diameter of block 38 is greater than the diameter of perforation 202, to prevent from falling in perforation 202.Block 38 abuts the concave surface 262 of transparent body 20 and plays stretching action to lifting rope 36, thus reflector 30 is hung in cavity 200.Preferably, the lifting rope 36 in the present embodiment can adopt the material manufacture of rigidity, as steel wire, iron wire etc., rocks to weaken or to prevent reflector 30 from producing bottom lifting rope 36.

Reflector 30 shelters from part incidence surface 24 after being hung in cavity 200, making can not directly through incidence surface 24 with the light that low-angle penetrates from light source 40, but first by the reflecting surface 34 of reflector 30 toward the outside circumferential direction reflect, and then to enter in transparent body 20 from incidence surface 24.Therefore, by the reflection of reflector 30, further light can be spread to periphery, thus obtain light type 50 as shown in Figure 4.

Because reflector 30 is installed in transparent body 20 by lifting rope 36, it can take out easily and be replaced with the reflector 30 (reflector 30 that such as curvature of reflecting surface 34 is higher or lower, or the different reflector 30 of size) of different reflecting effect in transparent body 20.Specifically, first the upper end of lifting rope 36 can be pulled down from block 38, then unclamp lifting rope 36, make it skid off in perforation 202, then reflector 30 is taken out together with lifting rope 36 in cavity 200.Afterwards, the reflector 30 of replacing is placed in the cavity 200 of transparent body 20, makes its lifting rope 36 through perforation 202, finally at the upper end fixed stop 38 of lifting rope 36.By changing different reflectors 30, lens 10 can obtain different dimming effects, thus manufacture lens without the need to additional designs again, and production cost is reduced.

In addition, understandably, in order to obtain different reflecting effects, also the length of lifting rope 36 can only be regulated, reflector 30 is made to be positioned at the different height and position place of cavity 200, reflector 30 changes relative to the distance of light source 40 in such cases, thus the scope of the light of reflection also changes.Thus, the dimming effect of lens 10 is also changed.

Claims

1. lens, comprise transparent body, it is characterized in that: also comprise the reflector be installed on movably in transparent body, and transparent body is for receiving light and regulating light, and reflector is arranged in the propagation path of light.

2. lens as claimed in claim 1, is characterized in that: reflector is hung in transparent body.

3. lens as claimed in claim 2, is characterized in that: also comprise the lifting rope be fixed on reflector, and transparent body offers the perforation worn for lifting rope.

4. lens as claimed in claim 3, is characterized in that: lifting rope is rigid material.

5. lens as claimed in claim 3, is characterized in that: also comprise the block be fixed on lifting rope, block is connected in transparent body.

6. lens as claimed in claim 5, is characterized in that: reflector and block lay respectively at the opposite end of lifting rope.

7. lens as claimed in claim 5, is characterized in that: transparent body comprises incidence surface and the exiting surface relative with incidence surface, bores a hole from incidence surface and extends to exiting surface.

8. lens as claimed in claim 7, is characterized in that: the incidence surface of transparent body encloses formation cavity, and reflector is contained in cavity.

9. lens as claimed in claim 7, is characterized in that: exiting surface comprises concave surface and the convex surface around concave surface, and block is connected on concave surface.

10. lens as claimed in claim 9, is characterized in that: reflector comprises and the joint face that lifting rope connects and the reflecting surface relative with joint face, and the curvature of reflecting surface is greater than the curvature of concave surface and convex surface.