TWM605552U - Optical lens and lens device - Google Patents

Abstract

An optical lens and lens device. The optical lens is suitable for collocation with a light source and includes a rear lens surface, a front lens surface, a bottom lens surface, and a top lens surface. The rear lens surface includes a light incident surface that is concave from back to front. The front lens surface includes a first light-emitting surface that is convex forward, and a second light-emitting surface that extends downward from the first light-emitting surface. The first light-emitting surface is for the light projected forward by the light source to emit to form a first light shape. The bottom lens surface can reflect the light beam projected obliquely downward from the light source to emit it from the second light emitting surface to form a second light shape overlapping the first light shape. The top lens surface can reflect the light beam projected obliquely upward from the light source to emit it from the first light-emitting surface to form a third light shape overlapping the first light shape and the second light shape. The new model has the effect of increasing the luminous flux of the emitted light.

Description

Optical lens and lens device

This new model relates to an optical element, in particular to an optical lens and lens device used to form a car lamp in cooperation with other elements.

1 to 3, an existing optical lens is suitable for projecting the light generated by a light source 11 forward. The light generated by the light source 11 can be divided into a forward light 111 projected forward substantially along an optical axis direction D11, an oblique upward light 112 projected diagonally upward and forward and deviated from the optical axis direction D11, and forward And deviate from the optical axis direction D11 and project diagonally downward light 113 obliquely downward.

The optical lens includes a rear lens surface 12 located at the rear and extending up and down, a front lens surface 13 spaced in front of the rear lens surface 12 and protruding forward, and a front lens surface 13 extending back and forth and connected to the rear lens surface 12 and the front lens surface. A top lens surface 14, a bottom lens surface 15 and two side lens surfaces 16 between the lens surfaces 13. The rear lens surface 12 includes a light incident surface 121 that is concave from back to front.

Referring to FIGS. 3 and 4, although a part of the light generated by the light source 11, namely the advancing light 111, is projected forward as shown in FIG. 3 and emitted through the front lens surface 13 to produce as shown in FIG. The light shape L11, but a part of the light, that is, part of the oblique upward light 112 and the oblique downward light 113, is refracted from the top lens surface 14 or the bottom lens surface 15 as shown in the light path α in FIG. There is also a part, that is, the other part of the oblique upward ray 112 and the oblique downward ray 113, which are totally reflected by the optical lens as shown in the optical path β of FIG. Although the oblique light ray 113 is also emitted from the front lens surface 13 as shown in the optical path γ of FIG. 3, it is projected to the optically ineffective area due to excessive expansion and divergence, and similarly cannot contribute to the light shape L11 of FIG. 4.

That is, a large part of the light of this kind of optical lens has external or internal friction or is projected to the optical ineffective area, so the luminous flux of the light source 11 is 284 lumens. After the optical lens acts, the effective luminous flux is only 104 lumens remaining. Needs to be further improved.

One of the objectives of the present invention is to provide an optical lens that can overcome at least one shortcoming of the prior art.

The optical lens is suitable for matching with a light source. The light source can generate forward light projected forward, and diagonal upward light and diagonal downward light projected diagonally upward and downward respectively.

The optical lens includes a rear lens surface, a front lens surface, a bottom lens surface, and a top lens surface.

The rear lens surface includes a light incident surface that is concave from back to front. The front lens surface includes a first light-emitting surface that is convex forward, and a second light-emitting surface that extends downward from the first light-emitting surface. The first light-emitting surface is for the forward light to emit to form a first light shape.

The front and back of the bottom lens are extended and connected between the front lens surface and the rear lens surface, and can reflect the obliquely downward light so that the obliquely downward light is emitted from the second light emitting surface to form a first light shape overlapping the first light shape Two light shape.

The top lens is connected between the front lens surface and the rear lens surface, and can reflect the oblique upward light so that the oblique upward light is emitted from the first light-emitting surface to form an overlapped first light shape and the rear lens surface. The third light shape of the second light shape.

The effect of the present invention is: through the top lens surface and the bottom lens surface, the oblique upward light and the oblique downward light of the light source are respectively emitted to the first light-emitting surface and the second light-emitting surface, thereby increasing the luminous flux of the emitted light. Solve the problem of low luminous flux in the past.

Another object of the present invention is to provide a lens device that can overcome at least one of the disadvantages of the prior art.

The lens device is suitable for collocation with a plurality of light sources as described above, and includes a plurality of optical lenses as described above. The optical lenses are integrally connected side by side, and each lens is suitable for matching a corresponding one of the light sources.

The effect of the present invention is that the lens device includes the optical lenses, so it also has the effect of increasing the luminous flux of the emitted light, and can solve the problem of low luminous flux in the past.

In the following description, similar or identical elements will be denoted by the same numbers.

Referring to FIGS. 5-7, a first embodiment of the new optical lens and lens device is an optical lens 1. The optical lens 1 includes a front lens surface 2 and a rear lens surface 3 spaced back and forth, a top lens surface 4 and a bottom lens surface 5 extending back and forth between the front lens surface 2 and the rear lens surface 3, and Two left and right spaced apart and connected to the side lens surface 6 between the front lens surface 2, the rear lens surface 3, the top lens surface 4 and the bottom lens surface 5.

The front lens surface 2 includes a first light-emitting surface 21 protruding forward, and a second light-emitting surface 22 extending vertically downward from the first light-emitting surface 21.

The first light-emitting surface 21 is generally a part of a cylindrical surface, specifically a cylindrical surface extending left and right in the axial direction, and the top end is connected to the top lens surface 4. The second light-emitting surface portion 22 is connected between the bottom edge of the first light-emitting surface portion 21 and the front edge of the bottom lens surface 5, and extends left and right longitudinally.

The specific structure of the rear lens surface 3 has been shown in FIGS. 5-7, but if the reader needs to further confirm the detailed structure, he can refer to the rear view of FIG. 9 and the top view of FIG. 10 by himself.

The rear lens surface 3 includes a light-incident surface 31 at the top and concave from back to front, and an expansion surface 32 that extends vertically from the light-incident surface 31 downward to form a trapezoid (see FIG. 9), An extension surface 33 that is located at the bottom side and extends left and right in the longitudinal direction and is roughly rectangular as seen from the rear view of FIG. 9, two arc curved surfaces 34 spaced from the left and right and extended in an arc, and two connecting these The curved surface 34 and the side surface 35 of the light incident surface 31 and the expanded surface 32.

Each curved surface 34 is located on one of the left and right opposite sides of the light incident surface 31 and the expansion surface 32, and is curved with a concave side facing backward. Each side portion 35 is connected between a respective curved surface portion 34 and the light incident surface portion 31 and the expansion surface portion 32, and looks generally fan-shaped. The side portions 35 can cooperate to effectively use the light that diffuses from the left and right, and control the extent of the light that diffuses from the left and the right.

The top lens surface 4 extends back and forth and is connected between the front lens surface 2 and the rear lens surface 3, and includes a top reflective surface 41 that is slightly curved and extended from the top end of the light incident surface 31 of the rear lens surface 3 upward. , And a top connecting surface 42 extending forward from the front end of the top reflecting surface 41 and connecting the front lens surface 2.

The optical lens 1 is diffused and roughened corresponding to the outer part of the top reflective surface 41. The top reflective surface 41 includes an expanded surface section 411 whose width gradually expands from back to front (see FIG. 10), and an equal width of left and right equal width, the front end of which is connected to the top connecting surface 42 and the rear end of which is connected to the expanded surface section 411.面段412. The wide surface sections 412 are generally rectangular in the top view of FIG. 10.

The top connecting surface 42 includes a top horizontal plane section 421 that connects the top end of the first light-emitting surface section 21 of the front lens surface 2 and extends horizontally back and forth, and a top horizontal plane section 421 extending vertically from the rear end of the top horizontal plane section 421 to connect the top reflective surface The top vertical surface section 422 at the front end of the isobaric section 412 of 41.

The specific structure of the bottom lens surface 5 has been shown in 5 to 7, but if the reader needs to further confirm the detailed structure, he can refer to the bottom view of FIG. 11 by himself.

The bottom lens surface 5 extends back and forth between the front lens surface 2 and the rear lens surface 3, and includes a bottom reflection surface 51 extending slightly from the bottom end of the extension surface 33 of the rear lens surface 3 forward and downward. , And a bottom connecting surface 52 connected to the front end of the bottom reflective surface 51 and extending horizontally back and forth and connected to the bottom end of the second light-emitting surface 22 of the front lens surface 2. The bottom reflective surface 51 is a part of a parabolic surface with the LED chip as the focal point. The optical lens 1 is diffused and roughened corresponding to the outer part of the bottom reflection surface 51.

The side lens surface 6 is an upright surface extending back and forth, and the outer edge contour is defined by the front lens surface 2, the rear lens surface 3, the bottom lens surface 5, and the top lens surface 4 in cooperation, and is defined from FIG. 6 It can be seen that the side lens surface 6 exposed in FIG. 6 is generally P-shaped as the front lens surface 2 extends.

Referring to FIGS. 7, 8 and 12, the first embodiment is suitable for use with a light source 7. The light source 7 has a luminous flux of 284 lumens, and can generate a forward light 71 projected substantially forward along an optical axis direction D21, and an oblique downward light 73 and an oblique upward light 72 projected diagonally downward and diagonally upward respectively. .

The forward ray 71 refers to the ray whose traveling direction is parallel to the optical axis direction D21 or the deviation angle A1 is within 0.57 degrees, and the oblique downward ray 73/inclined upward ray 72 refers to the traveling direction obliquely downward or obliquely Light rays above and deviating from the optical axis direction D21 by the deflection angle A1 of more than 1 degree.

The forward light 71 is incident from the light incident surface 31 of the rear lens surface 3, travels along the first light path x , and then exits from the first light output surface 21 of the front lens surface 2, and approximately along The optical axis direction D21 advances forward to form a first light shape L21 as shown in FIG. 12. The illumination area of the first light shape L21 is located approximately between 0° and -30 degrees in the vertical direction, and approximately ±35 degrees in the horizontal direction.

The first light shape L21 is wide at the top and narrow at the bottom, and is divided into the upper half of the main bright area and the lower half of the relatively darker area. The upper half of the first light shape L21 is a strip-shaped light shape extending left and right, and the lower half is generally rectangular.

Referring to FIGS. 7, 8 and 13, the obliquely downward light ray 73 enters from the light incident surface 31, travels along the second optical path y , and is reflected by the bottom reflective surface 51 of the bottom lens surface 5. It advances slightly forward and downward, and emits from the second light-emitting surface 22 of the front lens surface 2, and approximately moves forward along the optical axis direction D21, but after emitted from the second light-emitting surface 22, compared to For the advancing light 71 emitted from the first light-emitting face 21, it is a little bit lower, but further deviates from the optical axis direction D21 within about 2 to 3 degrees, and forms a position as shown in FIG. 13 The first light shape L21 overlaps the second light shape L22. The main illumination area of the second light shape L22 is generally belt-shaped, and is approximately located between 0° and -10 degrees in the vertical direction, and approximately located between ±35 degrees in the left and right direction.

Referring to FIGS. 7, 8 and 14, the oblique upward light 72 is incident from the light incident surface 31, and then travels along the third optical path z , and after being reflected by the top reflective surface 41 of the top lens surface 4 Forward and slightly downward, and exit from the first light-emitting surface 21 of the front lens surface 2, the emitted light deviates downward from the optical axis direction D21 by about N degrees, and N is an integer between 5 and 30 to form A third light shape L23 that overlaps and covers the first light shape L21 and the second light shape L22 as shown in FIG. 14. The illumination area of the third light shape L23 is approximately located between 0 and -30 degrees along the up and down direction, and approximately between ±40 degrees along the left and right direction. The main illumination area is in the shape of a strip extending left and right and located along the up and down direction. It is between about -5 degrees and -20 degrees, and is located between ±30 degrees in the left and right directions.

The effective luminous flux of the forward light 71 is 87.4 lumens, the effective luminous flux of the diagonally downward light 73 is 20.9 lumens, and the effective luminous flux of the diagonally upward light 72 is 58.3 lumens. An overall light shape L24 generated during the operation of the first embodiment is shown in FIG. 15. The overall light shape L24 is formed by the advancing light 71, the oblique upward light 72, and the oblique downward light 73, that is, the first light shape L21, the second light shape L22, and the third light shape L23 is superimposed on each other. The effective luminous flux of the light source 7 forming the overall light shape L24 is 156 lumens.

Taking the light source 7 of the prior art and the first embodiment at 284 lumens as a comparison benchmark, the luminous flux improvement efficiency of the first embodiment is about (156-104)÷104×100%=50%, which is the original 1.5 Times, the effect is very significant.

Referring to FIGS. 16 to 18, a second embodiment of the new optical lens and lens device is a lens device, which is suitable for collocation with several light sources 7 and includes several optical lenses 1 as described above. The optical lenses 1 are integrally connected side by side, and the light incident surface 31 of each optical lens 1 is located in front of a corresponding light source 7. The integrated light shape L25 that can be projected by the lens device of the second embodiment is shown in FIG. 18, that is, the light shape projected by the cooperation of the optical lenses 1 is the integrated light shape L25. It can be seen from Fig. 18 that the integrated light shape L25 is almost in the shape of a semi-concentric circle centered on the 0 degree center point and spread downward and outward. Since the second embodiment includes the optical lenses 1, the second embodiment also has the effect of increasing the luminous flux of the emitted light.

In summary, the effect of the new optical lens and lens device is that it can increase the luminous flux of the emitted light and solve the problem of low luminous flux in the past.

The above are only examples of the new model, and cannot be used to limit the scope of the patent application for the new model. The simple equivalent changes and modifications based on the scope of the patent application of the new model and the patent specification should also be the new model. Covered by the scope of the patent application.

1: Optical lens 2: Front lens surface 21: First light-emitting surface 22: Second light-emitting surface 3: Rear lens surface 31: Light-incident surface 32: Expanded surface 33: Extended surface 34: Curved surface 35: Side surface 4: Top lens surface 41: Top reflective surface 411: Expansion surface section 412: Constant-width surface section 42: Top connecting surface 421: Top horizontal plane section 422: Top vertical surface section 5: Bottom lens surface 51: Bottom reflective surface 52: Bottom connecting surface 6: Side lens surface 7: Light source 71: Forward light 72: Oblique upward light 73: Oblique downward light A1: Deviation angle D21: Optical axis direction L21: First light shape L22: Second light shape L23: Third light shape L24 : Overall light shape L25: Comprehensive light shape x : First light path y : Second light path z : Third light path

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a perspective view illustrating an existing optical lens; Figure 2 is a perspective view illustrating the existing optical lens from another angle; Figure 3 is a cross-sectional view, cut along the front and back direction, illustrating that the existing optical lens is equipped with a light source; 4 is a light shape diagram illustrating the light shape that the existing optical lens can project with the light source; Figure 5 is a perspective view illustrating a first embodiment of the new optical lens and lens device with a light source; Figure 6 is a perspective view illustrating the first embodiment from another angle; Figure 7 is a cross-sectional view, cut along the front and back direction, and illustrates the relationship between the first embodiment and the forward light generated by the light source; FIG. 8 is a cross-sectional view, similar to FIG. 7, illustrating the relationship between the embodiment and the diagonally upward light rays and the diagonally downward light rays generated by the light source; Figure 9 is a rear view illustrating the first embodiment; Figure 10 is a top view illustrating the first embodiment; Figure 11 is a bottom view illustrating the first embodiment; FIG. 12 is a light shape diagram illustrating a first light shape that can be projected by the first embodiment with the light source; FIG. 13 is a light shape diagram illustrating a second light shape that can be projected by the first embodiment with the light source; 14 is a light shape diagram illustrating a third light shape that can be projected by the first embodiment with the light source; 15 is a light shape diagram illustrating an overall light shape that can be projected by the first embodiment with the light source; Fig. 16 is a perspective view illustrating a second embodiment of the optical lens and lens device of the present invention with several light sources; Figure 17 is a perspective view illustrating the second embodiment from another angle; and FIG. 18 is a light shape diagram illustrating a comprehensive light shape that can be projected by the second embodiment with the light sources.

1: Optical lens

2: Front lens surface

21: The first light face

22: The second light face

3: Rear lens surface

31: Light face

4: Top lens surface

41: Top reflex face

42: top connection face

421: Top Horizontal Section

422: Top vertical section

5: Bottom lens surface

51: bottom reflection face

52: bottom connection face

7: light source

71: forward light

A1: deviation angle

D21: Optical axis direction

x : first light path

Claims (9)

An optical lens suitable for collocation with a light source capable of generating forward light projected forward, and diagonal upward light and diagonal downward light projected forward diagonally upward and diagonally downward respectively. The optical lens includes: A rear lens surface, including a light-incident face that is concave from back to front; A front lens surface, including a first light-emitting surface convex forward, and a second light-emitting surface extending downward from the first light-emitting surface. The first light-emitting surface is for the forward light to emit to form a first light shape ； A bottom lens surface extends back and forth between the front lens surface and the rear lens surface, and can reflect the obliquely downward light rays so that the obliquely downward light rays are emitted from the second light-emitting surface to form an overlapped first light shape Second light form; and A top lens surface extending back and forth is connected between the front lens surface and the rear lens surface, and can reflect the oblique upward light so that the oblique upward light is emitted from the first light-emitting surface to form an overlapping first light shape and The second light shape is the third light shape. The optical lens according to claim 1, wherein the top lens surface includes a top reflective surface that extends forward and upward from the top end of the rear lens surface, and a top reflective surface that extends forward from the front end of the top reflective surface and is connected to the front lens. The top connecting surface of the mirror surface can reflect the oblique upward light so that the oblique upward light forms the third light shape. The bottom lens surface includes a bottom reflecting surface extending forward and downward from the bottom end of the rear lens surface , And a bottom connecting surface that extends forward from the front end of the bottom reflective surface and connects to the front lens surface, and the bottom reflective surface can reflect the oblique downward light so that the oblique downward light forms the second light shape. The optical lens according to claim 2, wherein the top reflective surface includes an expanded surface section whose width expands from back to front, and an equal width surface connected between the top connecting surface and the expanded surface section. segment. The optical lens according to claim 3, wherein the top connecting surface includes a top horizontal section connecting the top of the front lens surface and extending horizontally back and forth, and a top reflecting surface extending downward from the rear end of the top horizontal section. The top vertical surface section of this wide surface section. The optical lens according to claim 2, wherein the bottom connecting surface extends horizontally back and forth, and the bottom reflective surface is a part of a parabolic surface. The optical lens according to claim 2, wherein the outer part of the optical lens corresponding to the bottom reflection surface and the top reflection surface is diffused and roughened. The optical lens according to claim 2, wherein the rear lens surface further includes an expansion surface that extends up and down and whose width expands downward from the light incident surface. The optical lens according to claim 7, wherein the rear lens surface further includes two arc-curved surfaces spaced from left to right and arc-curved, and two connecting the arc-curved surfaces, the light-incident surface and the expanded surface On the side surface, the concave side of each arc curved surface is curved backward, and each side surface is connected with a separate arc curved surface, the light incident surface and the expanded surface. A lens device suitable for collocation with a plurality of said light sources, the lens device comprising: Several optical lenses, as described in any one of Claims 1 to 8, the optical lenses are integrally connected side by side on the left and right, and each optical lens is suitable for matching a corresponding one of the light sources.

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