WO2013131227A1 - Led light guide lens - Google Patents

Led light guide lens Download PDF

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Publication number
WO2013131227A1
WO2013131227A1 PCT/CN2012/071911 CN2012071911W WO2013131227A1 WO 2013131227 A1 WO2013131227 A1 WO 2013131227A1 CN 2012071911 W CN2012071911 W CN 2012071911W WO 2013131227 A1 WO2013131227 A1 WO 2013131227A1
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WO
WIPO (PCT)
Prior art keywords
light
lens
led
hollow portion
emitting surface
Prior art date
Application number
PCT/CN2012/071911
Other languages
French (fr)
Chinese (zh)
Inventor
胡挺进
Original Assignee
胡斌
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 胡斌 filed Critical 胡斌
Priority to PCT/CN2012/071911 priority Critical patent/WO2013131227A1/en
Publication of WO2013131227A1 publication Critical patent/WO2013131227A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to the field of illumination, and relates to an LED light guiding lens that can be used only as a light guiding lens, and can also function as a light guiding lens and a lamp cover.
  • LED bulbs commonly used in the market generally include an LED illuminator (including an LED lamp bead and an aluminum substrate), a heat sink, a driving circuit, a lamp cap, a lamp cover, and a light guiding lens for realizing light distribution.
  • the existing light guiding lens is basically single. a cylindrical lens, as shown in FIG.
  • the unitary cylindrical lens generally includes a base for connecting an LED substrate, a cylindrical body extending upward from the base, and an inverted conical light-emitting surface formed at an upper end portion of the body.
  • the existing light guiding lens has an unattractive surface shape for achieving the light distribution effect, there is currently no light guide lens in the market to replace the lamp cover, and it is used as both a light guiding lens and a lampshade.
  • the light emitted by the LED is transmitted upward through the cylindrical body to the light exiting portion, and after being refracted or reflected and refracted, the light is mainly emitted from the three regions, specifically Included is a vertical area substantially along the axis of the cylindrical body, a first annular area that is 60 degrees from the vertical area, and a second annular area that is at an angle of 60 degrees to the first annular area, and 1.
  • the area of the second annular surface and the vertical area can be adjusted by adjusting the size of the cylindrical body and the light exiting portion, but the adjustment range is limited.
  • the angle of the light emitted by the lamp post can reach about 240 degrees, but there is still a blind spot of 120 degrees, so that the coverage of the emitted light is not large enough; in addition, the emitted light is mainly concentrated in the above vertical area, that is, the concentrated light is mainly concentrated. In the area facing the light guiding lens, therefore, the outgoing light is concentrated and not uniform enough; further, for the light guiding lens of such a structure, on the one hand, it is impossible to ensure that the incident light is collected in the light guiding lens, and the other In view, the incident light needs to be re-emitted through the entire cylindrical body, so the light loss is large.
  • an LED light guiding lens that can be used at least as a light guiding lens on the one hand and as both a light guiding lens and a light cover on the other hand.
  • the technical solution adopted by the utility model is: an LED light guiding lens comprising a lens body and a lens cover, wherein the lens body has an indented hollow portion for accommodating the LED illuminator, and an inner surface of the hollow portion a light incident surface of the LED light guiding lens; the lens body further has an indented concave surface, the lens cover is engaged with an outer surface of the lens body as a substantially light emitting surface, and the lens cover surrounds the invagin The light-emitting surface, the outer surface of the lens cover and the portion of the substantially light-emitting surface of the lens body that is not surrounded by the lens cover constitute a light-emitting surface of the LED light guide lens.
  • the design of the trapped light surface can increase the derivation light below the horizontal plane, so that the LED light guiding lens of the present invention has a more uniform light output, and if combined with a suitable shape of the light emitting surface, the existing single columnar light guiding lens can be compared with the existing single columnar light guiding lens. A larger angle of illumination is obtained.
  • the invading light surface is an inverted conical light emitting surface.
  • the light incident surface is a frosted surface, which makes the incident light more divergent, and further makes the light led out by the LED light guiding lens more uniform.
  • the lens body has an intrinsic light surface
  • the invading light surface and the hollow portion are disposed on the top and bottom of the lens body
  • the center line of the invading light surface coincides with the center line of the hollow portion.
  • the center line of the invading light surface coincides with the center line of the hollow portion to make the most efficient use of the invading light surface.
  • the LED light guiding lens is a rotating body whose center line of the inner concave light surface and the hollow portion is a rotation center line.
  • the hollow portion includes a first hollow portion forming an opening of the hollow portion and a second hollow portion receiving the first hollow portion, the second hollow portion being opposite to the first hollow portion in a direction perpendicular to a center line of the hollow portion
  • the upper portion is offset inwardly to form an inner stepped surface between the first and second hollow portions, and the inner step protrudes toward the opening direction to form a card slot on the carrier (usually a heat sink) for the LED illuminator Engaged card.
  • the first light-emitting surface includes a first light-emitting surface surrounding the opening of the invading light surface and a second light-emitting surface surrounding the opening of the hollow portion, and the first light-emitting surface is offset from the second light-emitting surface to make the first
  • a step surface is formed between the second illuminating surface and the second illuminating surface; the opening edge of the lens cover is engaged with the step surface, so that the second illuminating surface and the outer surface of the lens cover smoothly transition at the joint.
  • the first and second light-emitting surfaces are all part of a spherical surface, and the first and second light-emitting surfaces are concentric. a center of the first and second light-emitting surfaces is located at a boundary plane formed by an outer edge of the stepped surface between the first and second light-emitting surfaces On. The boundary plane between the first and second light exit surfaces is perpendicular to the center line of the hollow portion. All of the above technical features are advantageous for the design and manufacture of the lens body and the lens cover.
  • each of the lens cover are equal in diameter to the diameters of the first and second light-emitting surfaces, respectively, and the first light-emitting surface completely conforms to the inner surface of the lens cover to make the lens
  • the outer surface of the cover and the second light-emitting surface form a spherical surface as a light-emitting surface of the LED light guiding lens.
  • the illuminating surface is designed as a spherical surface, and even if the lens body adopts an intrinsic illuminating surface, a larger angle of illuminating angle can be obtained with respect to the unitary lenticular lens.
  • the light-emitting surface is a spherical surface greater than 50% (the shape of the outer casing conventionally used in conventional bulbs is hemispherical), so that an exit angle of more than 150 degrees can be obtained; the light-emitting surface is especially spherical surface of 80% or more. In this way, an exit angle of more than 300 degrees can be obtained.
  • the LED light bulb of the present invention can have the same appearance shape as the currently used LED candle light.
  • Another object of the present invention is to provide an LED light bulb including an LED illuminator and a lamp cover, wherein the lamp cover is the LED light guide lens described above, and the LED illuminator is housed in a hollow portion of the LED light guide lens, and The carrier of the LED bulb for carrying the LED illuminator is engaged with the splicing member provided on the inner wall of the hollow portion. That is, the LED light bulb of the present invention replaces the conventional lamp cover with the above-described LED light guiding lens, and it is no longer necessary to provide a light guiding lens built in the lamp housing.
  • the utility model has the beneficial effects that: the LED light guiding lens of the utility model adopts the structure of the lens body and the lens cover which are joined together, so that it can be installed not only as a LED light guiding lens in a conventional LED light bulb, but also It replaces the lampshade of the traditional LED bulb, and integrates the light guiding lens and the lampshade, which not only simplifies the installation of the LED bulb, but also facilitates the heat dissipation of the LED lamp bead; in addition, if the LED light guiding lens of the present invention is to be used Designed to have a spherical surface and a candle shape with a certain surface area, a larger illumination angle can be obtained with respect to the existing unitary lenticular lens.
  • FIG. 1 is a view showing the structure of a conventional unitary lenticular lens and the distribution of emitted light
  • FIGS. 2a and 2b are perspective views of different perspectives of an embodiment of an LED light guiding lens according to the present invention
  • 3 is a front view of the LED light guiding lens shown in FIGS. 2a and 2b
  • FIG. 4 is a cross-sectional view taken along line AA of FIG. 3
  • FIG. 5 is a view showing a distribution of light emitted from the LED light guiding lens shown in Figs. 2a and 2b
  • 6 is a front view showing another embodiment of the LED light guiding lens according to the present invention
  • FIGS. 1 is a view showing the structure of a conventional unitary lenticular lens and the distribution of emitted light
  • FIGS. 2a and 2b are perspective views of different perspectives of an embodiment of an LED light guiding lens according to the present invention
  • 3 is a front view of the LED light guiding lens shown in FIGS. 2a and 2b
  • FIG. 7a and 7b respectively show the spherical and candle-shaped LED light guiding lens of the present invention in a small diameter of 35 mm.
  • FIG. 8 shows the application of the spherical LED light guiding lens of the present invention to a transparent bulb having a diameter of 55 mm, wherein The LED light guiding lens is built in, and is only used as a light guiding lens;
  • FIG. 9 shows the main process of assembling the spherical LED light guiding lens shown in FIG. 7a as a cover, and assembling the LED lamp of the utility model;
  • the LED light guiding lens of the present invention includes a lens body 1 and a lens cover 2, and the lens body 1 has an indentation for accommodating LED illumination.
  • the hollow portion 11 of the body such that the inner surface of the hollow portion 11 becomes the light incident surface of the LED light guiding lens, and the light incident surface can adopt a frosted surface; the lens body 1 further has an indented concave light emitting surface 12,
  • the intrinsic light exiting surface 12 is not limited to one, and is not limited to the inverted cone-shaped light exiting surface which is generally used at present, and the shape of the invading light surface can achieve the purpose of increasing the light output below the horizontal plane. That is, the lens cover 2 and the outer surface of the lens body 1 as a substantially light-emitting surface are joined by ultrasonic welding, for example.
  • the technical solution of the present invention does not exclude the structure in which the two are integrally formed.
  • the lens cover 2 surrounds all of the indented light-emitting surfaces 12, and the outer surface of the lens cover 2 and the portion of the substantially light-emitting surface of the lens body 1 that is not surrounded by the lens cover 2 are
  • the light-emitting surface of the LED light guiding lens of the present invention is constructed.
  • only one recessed light surface 12 is provided.
  • the recessed light surface is preferably disposed at the top and bottom of the lens body 1 with the hollow portion 11, and is recessed at the center line of the light surface 12.
  • the LED light guiding lens of the present invention is a rotating body having a center line of the indentation light surface and the hollow portion as a rotation center line, and has an outer shape which is more suitable as a lamp cover.
  • the lens body is provided with a plurality of intrinsic light exiting faces 12 (for example, three)
  • the plurality of indented light exiting faces 12 may be uniformly arranged around the center line of the hollow portion 11 in the circumferential direction, for example, and each of the trapped light beams is trapped.
  • the angle between the center line of the face 12 and the center line of the hollow portion 11 is preferably equal.
  • the substantially light-emitting surface 14 of the lens body 1 (i.e., the outer surface of the lens body 1) includes a first light-emitting surface 141 surrounding the opening 121 of the invading light surface 12 and an opening 115 surrounding the hollow portion 11.
  • the second light-emitting surface 142, the first light-emitting surface 141 is offset inwardly relative to the second light-emitting surface 142, so as to form a stepped surface 143 therebetween, wherein the stepped surface may be a plane, a slope or a partial protrusion.
  • the opening edge of the lens cover 2 is engaged with the step surface 143 such that the second light-emitting surface 142 (i.e., the portion of the substantially light-emitting surface that is not surrounded by the lens cover 2) is joined to the outer surface of the lens cover 2 Smooth transitions, which facilitate the formation of a smooth exit surface or cover surface.
  • the first and second light-emitting surfaces 141, 142 may be part of a spherical surface, and the first and second light-emitting surfaces 141, 142 are concentric.
  • the boundary plane is the first and second light-emitting surfaces. A plane formed by the outer edge of the step surface 143, as shown in FIG.
  • the entire step surface 143 can be, but is not limited to, located on the boundary plane, the lens cover 2 can be designed as a hemispherical outer casing;
  • Example 3 in addition to the first embodiment or the second embodiment, if the boundary plane between the first and second light-emitting surfaces is perpendicular to the center line of the hollow portion 11, even if the transparent cover 2 has other shapes, the present invention can be used.
  • the light guide lens of the utility model is a standard rotary body in appearance. Under the conditions satisfying the first, second, and third embodiments, as shown in FIG. 4, the height of the second light-emitting surface 142 (the distance between the opening 115 of the hollow portion 11 and the boundary plane) is preferably equal to or greater than the radius of the spherical surface.
  • the maximum height of the hollow portion 11 is preferably greater than the height of the second light-emitting surface 142 so as to extend into a portion of the lens body 1 surrounded by the first light-emitting surface 141, In this way, the incident light emitted by the LED illuminator can be largely collected into the light guiding lens, and the distance that the incident light needs to pass through the lens can be reduced, and the light loss can be reduced.
  • the person skilled in the art can adjust according to the LED illuminator used.
  • the height of the first light-emitting surface 141 (infrared light)
  • the distance between the opening 121 of the surface 12 and the boundary plane may be greater than or equal to 1/2 of the radius of the spherical surface forming the second light-emitting surface 142; in addition, the maximum height of the recessed light-emitting surface 12 may be less than or equal to the height of the first light-emitting surface 141. 1/2, and the minimum distance between the hollow portion 11 and the invading light exit surface 12 may be less than or equal to 1/2 of the height of the first light exit surface 141.
  • the lens cover 2 may be a spherical shell having an inner surface and an outer surface having diameters equal to the diameters of the first and second light-emitting surfaces 141, 142, respectively, such that the first light-emitting surface 141 is completely integral with the lens cover 2 when engaged.
  • the surface is bonded to each other, and the light-emitting surface of the LED light guiding lens (including the outer surface of the lens cover 2 and the second light-emitting surface 142) is spherical.
  • the LED light guide lens having the above technical features is used in place of the outer casing of the LED light bulb, the LED light bulb of the present invention can have the same appearance shape as the currently used LED bulb.
  • the light-emitting surface of the LED light guiding lens of the present invention is designed to be larger than 50% of the spherical surface (the shape of the outer casing of the conventional bulb is conventionally hemispherical), the light-emitting angle of more than 150 degrees can be obtained; It can be seen that if the illuminating surface is designed to be 80% or more of the spherical surface, an exit angle of more than 300 degrees can be obtained, and thus it can be seen that the light guiding lens of this shape has a strong advantage over the conventional single lenticular lens.
  • a person skilled in the art can adjust the ratio of the light-emitting surface of the LED light guiding lens to the complete spherical surface according to the diameter of the heat-dissipating body supporting the LED light-emitting body according to a conventional method; and adjust the sphere forming the second light-emitting surface 142 according to the size of the heat sink and the power size. diameter of.
  • the shape of the lens cover 2 may be a candle-type lamp cover (the candle-type lamp cover is a special term in the field of illumination, the shape of which is determinable in the field), and thus, if utilized
  • the LED light guiding lens having the technical feature can replace the outer casing of the LED light bulb, so that the LED light bulb of the present invention has the same appearance shape as the currently used LED candle light.
  • the transparent cover 2 is in the shape of a candle-shaped lamp cover, it is preferable that the boundary plane between the first and second light-emitting surfaces is perpendicular to the center line of the hollow portion 11.
  • LED light guide lens For a larger size LED light guide lens, it is suitable for replacing the traditional cover of the LED light bulb, and is used both as a cover and as a light guide lens, for example, instead of a small bulb or a candle lamp having a diameter of 45 mm or less, for example, for example, 7a and 7b; for a smaller size, especially spherical LED light guide lens, it can be used instead of a monocular lens such as a transparent bulb or a candle lamp with a diameter of 50 mm or more to obtain a larger
  • the illumination angle is specifically shown in Fig. 8.
  • the hollow portion 11 may include a first hollow portion 111 forming an opening 115 of the hollow portion and a second hollow portion 112 receiving the first hollow portion, the second hollow portion 112 being opposite to the first hollow portion
  • the portion 111 is offset inwardly in a direction perpendicular to the center line of the hollow portion to form an inner stepped surface 113 therebetween.
  • the inner step protrudes in the direction of the opening 115 for engaging with the card slot on the heat sink.
  • the card slot 5 on the heat dissipating body is generally a ring-shaped annular card slot disposed around the LED illuminating body, so that the accommodating member 114 can also be The matching snap ring is fast for a plurality of matching cards; and as shown in FIG. 10, another form of the card slot 5 of the heat sink is, for example, two bayonet ports disposed around the LED illuminator. Then, the card loading member 114 is a card block corresponding to the bayonet one-to-one correspondence. As shown in FIG. 9, the card assembly 114 is inserted into the circular ring groove 5 of the heat sink carrying the LED illuminator, and is glued and fixed, thereby completing the main assembly and fixing steps of the LED bulb of the present invention. .

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

An LED light guide lens comprises a lens body (1) and a lens cover (2), the lens body (1) is provided with a concave hollow part (11) used for containing an LED luminary, the inner surface of the hollow part (11) is a light incident surface of the LED light guide lens; the lens body (1) is also provided with a concave light emitting surface (12), the lens cover (2) is joint with the outside surface serving as a basal light emitting surface of the lens body (1), so that the lens cover (2) envelops the concave light emitting surface (12), the outside surface of the lens cover (2) and part of the basal light emitting surface of the lens body (1) which is not enveloped by the lens cover (2) are provided as the light emitting surface of the LED light guide lens. The LED light guide lens is not only provided in a conventional LED bulb as an LED light guide lens, but also substitutes a lamp cover of a conventional LED bulb. The LED light guide lens makes a light guide lens and a lamp cover integrated together, simplifies the installation of an LED bulb, obtains more lighting angle and benefits the radiation of the LED lamp.

Description

一种 LED导光透镜  LED light guiding lens
技术领域 本实用新型涉及照明领域， 由于涉及一种即可仅作为导光透镜使用，又可兼具导光透 镜和灯罩作用的 LED导光透镜。 背景技术 目前市场常用的 LED灯泡通常包括 LED发光体（包括 LED灯珠和铝基板）、散热体、 驱动电路、灯头、灯罩和实现配光的导光透镜， 现有的导光透镜基本为单体柱状透镜， 如 图 1所示， 该种单体柱状透镜一般包括用于连接 LED基板的底座， 从底座向上延伸的一 圆柱形本体， 以及在本体上端部形成的具有倒圆锥形出光面的出光部， 由于现有导光透镜 为达到配光效果设计有并不美观的表面形状，因此，目前市场上没有用导光透镜取代灯罩， 使其既作为导光透镜又作为灯罩的做法。 另外， 对于现有的如图 1所示的单体柱状透镜， LED发出的光通过圆柱形本体向上 传送至出光部， 经过折射或反射和折射后， 主要从三个面域向外发射， 具体讲包括基本沿 圆柱形本体轴线方向的垂直面域， 与该垂直面域呈 60度的第一环形面域， 以及与第一环 形面域呈 60度夹角的第二环形面域， 而第一、 第二环形面域和垂直面域的面积可通过调 整圆柱形本体和出光部的尺寸进行调整， 但调整范围有限。这样， 该种灯柱的出射光角度 可达约 240度， 但仍有 120度的盲区， 从而出射光的覆盖范围不够大； 另外， 出射光主要 集中在上述垂直面域， 即出射光主要集中在与导光透镜正对的区域上， 因此， 使出射光较 为集中而不够均匀； 此外， 对于该种结构的导光透镜， 一方面无法保证入射光均收集于该 导光透镜中， 另一方面入射光需要经过整个圆柱形本体再出射， 因此光损较大。 实用新型内容 本实用新型的一个目的在于提供一种至少可一方面仅作为导光透镜使用，另一方面既 作为导光透镜又作为灯罩使用的 LED导光透镜。 本实用新型采用的技术方案为： 一种 LED导光透镜， 包括透镜体和透镜罩， 所述透 镜体具有一内陷的用于容置 LED发光体的中空部，所述中空部的内表面为 LED导光透镜 的入光面；所述透镜体还具有一内陷的内陷出光面，所述透镜罩与透镜体的作为基本出光 面的外表面相接合，使透镜罩包围所述内陷出光面，所述透镜罩的外表面和透镜体的基本 出光面的未被透镜罩包围的部分构成 LED导光透镜的出光面。 在此， 设计内陷出光面可 以增加水平面以下的导出光线， 使本实用新型的 LED导光透镜的出光更加均匀， 若配合 适当形状的出光面， 即可相对现有的单体柱状导光透镜获得较大的发光角度。 其中， 所述内陷出光面为倒圆锥形出光面。 其中， 所述入光面为磨砂面， 使入射光线更加发散， 进而使 LED导光透镜导出的光 更加均匀。 其中，所述透镜体具有一个内陷出光面，所述内陷出光面与中空部分设于透镜体的顶 部和底部， 且内陷出光面的中心线与中空部的中心线重合。 对于具有一个内陷出光面的 LED 导光透镜， 内陷出光面的中心线与中空部的中心线重合可对内陷出光面进行最有效 的利用。 其中，所述 LED导光透镜为以内陷出光面和中空部的中心线为旋转中心线的回转体。 其中，所述中空部包括形成中空部的开口的第一中空部和与第一中空部相承接的第二 中空部，第二中空部相对第一中空部在与中空部的中心线垂直的方向上向内偏移，使第一 和第二中空部之间形成内台阶面， 所述内台阶面向开口方向凸设一用于与 LED发光体的 载体 （通常为散热体） 上的卡槽相卡合的装卡件。 其中，所述基本出光面包括包围内陷出光面的开口的第一出光面和包围中空部的开口 的第二出光面，所述第一出光面相对第二出光面向内偏移，使第一和第二出光面之间形成 一台阶面；所述透镜罩的开口边沿与台阶面相接合，使第二出光面与透镜罩的外表面在接 合处光滑过渡。 对于具有光滑出光面的 LED导光透镜更适宜作为 LED灯泡的外罩使用， 以使其更接近传统外罩， 甚至与传统外罩的形状相同。 其中， 所述第一和第二出光面均为球面的一部分， 且第一和第二出光面共球心。所述 第一和第二出光面的球心位于由第一和第二出光面间的台阶面的外边沿形成的分界平面 上。所述第一和第二出光面间的分界平面与中空部的中心线垂直。以上这些技术特征都有 利于透镜体和透镜罩的设计和制造。 所述透镜罩的均是球面的一部分的内表面和外表面的直径分别与第一和第二出光面 的直径相等，所述第一出光面完全与透镜罩的内表面相贴合，使透镜罩的外表面与第二出 光面形成作为 LED导光透镜的出光面的球面。 这样， 一方面， 若利用具有该技术特征的 LED导光透镜取代 LED灯泡的外壳， 即可使本实用新型的 LED灯泡与目前常用的 LED 球泡灯具有相同的外观形状。另外， 将出光面设计为球面， 即使采用透镜体采用一个内陷 出光面， 也可相对单体柱状透镜获得更大角度的发光角度。 其中， 所述出光面为大于 50%的球面 （现有球泡灯惯常采用的外壳形状为半球形）， 这样可获得超过 150度的出光角度； 所述出光面特别是大于等于 80%的球面， 这样， 可 获得超过 300度的出光角度。 其中，在由第一和第二出光面间的台阶面的外边沿形成的分界平面与中空部的中心线 垂直的情况下， 将透镜罩的形状设计为蜡烛型灯罩的形状更为有利。这样， 若利用具有该 技术特征的 LED导光透镜取代 LED灯泡的外壳， 即可使本实用新型的 LED灯泡与目前 常用的 LED蜡烛灯具有相同的外观形状。 本实用新型的另一个目的是提供一种 LED灯泡，其包括 LED发光体和灯罩， 所述灯 罩为上述的 LED导光透镜，所述 LED发光体容置于 LED导光透镜的中空部内，并且 LED 灯泡的用于承载 LED 发光体的载体与中空部内壁上设置的装卡件相卡合。 即本发明的 LED灯泡利用上述 LED导光透镜代替常规灯罩， 并且无需再设置内置于灯罩内的导光透 镜。 本实用新型的有益效果为： 本实用新型的 LED导光透镜通过采用具有接合在一起的 透镜体和透镜罩的结构，使其不仅可以作为 LED导光透镜安装于传统的 LED灯泡中，还 可使其替代传统 LED灯泡的灯罩， 将导光透镜和灯罩集成为一体， 这不仅可以简化 LED 灯泡的安装， 也更有利于 LED灯珠的散热； 另外， 若将本实用新型的 LED导光透镜设计 为具有一定表面积的球形和蜡烛形， 则可相对现有单体柱状透镜获得更大的发光角度。 附图说明 图 1示出了现有单体柱状透镜的结构及出射光的分布情况； 图 2a和 2b为根据本实用新型的 LED导光透镜的一种实施结构的不同视角的立体示 意图； 图 3为图 2a和 2b所示的 LED导光透镜的主视图； 图 4为图 3中 A-A向剖视图； 图 5示出了图 2a和 2b所示的 LED导光透镜的出射光的分布情况； 图 6示出了根据本实用新型的 LED导光透镜的另一种实施结构的主视图； 图 7a和 7b分别示出了本实用新型的球形和蜡烛形 LED导光透镜在直径为 35mm的 小型球泡灯上的应用， 其中， LED导光透镜外置， 代替 LED灯泡的灯罩； 图 8示出了本实用新型的球形 LED导光透镜在直径为 55mm的透明球泡灯上的应 用， 其中， LED导光透镜内置， 仅作为导光透镜使用； 图 9示出了将图 7a所示的球形的 LED导光透镜作为外罩使用， 组装成本实用新型 的 LED灯泡的主要过程； 图 10示出了利用图 8所示的球形的 LED导光透镜代替单体柱状透镜， 组装成具有 内置导光透镜的 LED灯泡的主要过程。 具体实施方式 如图 2a、 2b、 3、 4禾 B 6所示， 本实用新型的 LED导光透镜包括透镜体 1和透镜罩 2， 该透镜体 1具有一内陷的用于容置 LED发光体的中空部 11， 这样， 中空部 11的内表面 就成为 LED导光透镜的入光面， 该入光面可采用磨砂面； 该透镜体 1还具有一内陷的内 陷出光面 12， 在此， 该内陷出光面 12并不局限于设置一个， 且也并不局限于目前通常采 用的倒圆锥形出光面，内陷出光面的形状只要能够达到增加水平面以下的导出光线的目的 即可;透镜罩 2与透镜体 1的作为基本出光面的外表面例如是通过超声波焊接的方式相接 合（在此， 应理解为本实用新型的技术方案并没有排除二者为一体成型的结构， 只是该种 结构的加工难度很高）， 使透镜罩 2包围所有的内陷出光面 12， 而透镜罩 2的外表面和透 镜体 1的基本出光面的未被透镜罩 2包围的部分则构成本实用新型的 LED导光透镜的出 光面。 对于如图 4所示的透镜体仅设置一个内陷出光面 12的结构， 该内陷出光面优选为与 中空部 11分设于透镜体 1的顶部和底部， 且内陷出光面 12的中心线与中空部 11的中心 线重合， 而本实用新型的 LED导光透镜特别是以内陷出光面和中空部的中心线为旋转中 心线的回转体， 使其具有更适合作为灯罩的外观形状。在此， 若透镜体设置多个内陷出光 面 12 (例如是三个） 时， 多个内陷出光面 12可在周向上围绕中空部 11的中心线例如是 均匀布置，且各内陷出光面 12的中心线与中空部 11的中心线间的夹角优选为相等。该种 设置多个内陷出光面 12的结构， 对于主体仍然是柱状的导光透镜可增大发光角度。 如图 3和 4所示， 该透镜体 1的基本出光面 14 (即透镜体 1的外表面） 包括包围内 陷出光面 12的开口 121的第一出光面 141和包围中空部 11的开口 115的第二出光面 142， 第一出光面 141相对第二出光面 142向内偏移， 使二者之间形成一台阶面 143， 在此， 该 台阶面可以是平面、斜面或者局部具有凸起或凹坑的结构；透镜罩 2的开口边沿与台阶面 143相接合， 使第二出光面 142 (即基本出光面的未被透镜罩 2包围的部分） 与透镜罩 2 的外表面在接合处光滑过渡， 这样有利于形成光滑的出光面或者外罩表面。 作为实施例 1， 该第一和第二出光面 141,142可均为球面的一部分， 且第一和第二出 光面 141,142共球心。作为实施例 2，在实施例 1的基础上，若将第一和第二出光面 141,142 的球心恰好位于二者间的分界平面上，其中，该分界平面为以第一和第二出光面间的台阶 面 143的外边沿形成的一平面，如图 4所示，整个台阶面 143可以但不局限于均位于该分 界平面上， 则即可将透镜罩 2设计为半球形外壳； 作为实施例 3， 在实施例 1或实施例 2 的基础上， 若第一和第二出光面间的分界平面再与中空部 11的中心线垂直， 则即使透明 罩 2为其他形状，也可使本实用新型的导光透镜从外观上看是标准的回转体。在满足实施 例 1、 2和 3的条件下， 如图 4所示， 第二出光面 142的高度（中空部 11的开口 115与分 界平面间的距离）优选是大于等于形成其球面的半径的 1/2，而中空部 11的最大高度优选 是大于第二出光面 142的高度， 使其延伸至透镜体 1的由第一出光面 141包围的部分中， 这样， 可以较大程度地将 LED发光体发出的入射光收入导光透镜中， 并减少入射光需要 在透镜中通过的距离， 减少光损， 本领域技术人员可根据所使用的 LED发光体调整该中 空部 11的入口 115的直径。 在满足实施例 1、 2和 3的条件， 且内陷出光面 12的中心线 与中空部 11的中心线重合的情况下， 如图 4所示， 第一出光面 141的高度 （内陷出光面 12的开口 121与分界平面间的距离） 可以大于等于形成第二出光面 142的球面的半径的 1/2； 另外， 内陷出光面 12的最大高度可以小于等于第一出光面 141的高度的 1/2， 而中 空部 11与内陷出光面 12的最小距离亦可以小于等于第一出光面 141的高度的 1/2。 该透镜罩 2可以是内表面和外表面的直径分别与第一和第二出光面 141,142的直径相 等的球壳， 这样， 在接合时， 第一出光面 141就可完全与透镜罩 2的内表面相贴合， 而使 LED导光透镜的出光面（包括透镜罩 2的外表面与第二出光面 142)为球面。 这样， 如图 7a所示， 若利用具有上述技术特征的 LED导光透镜取代 LED灯泡的外壳， 即可使本实 用新型的 LED灯泡与目前常用的 LED球泡灯具有相同的外观形状。 若将本实用新型的 LED导光透镜的出光面设计为大于 50%的球面（现有球泡灯惯常 采用的外壳形状为半球形）， 这样可获得超过 150度的出光角度； 如图 5所示， 若将出光 面设计为大于等于 80%的球面， 则可获得超过 300度的出光角度， 由此可见， 该种形状 的导光透镜相对于现有单体柱状透镜具有很强的优势。本领域技术人员可以按照常规方法 根据支撑 LED发光体的散热体的直径调整 LED导光透镜的出光面占完整球面的比例；并 可根据散热体大小以及功率大小调整形成第二出光面 142的球体的直径。 另外， 如图 6和 7b所示， 该透镜罩 2的形状可为蜡烛型灯罩 （蜡烛型灯罩是照明领 域的专用术语， 其形状在该领域内是可确定的）的形状， 这样， 若利用具有该技术特征的 LED导光透镜取代 LED灯泡的外壳， 即可使本实用新型的 LED灯泡与目前常用的 LED 蜡烛灯具有相同的外观形状。对于透明罩 2采用蜡烛型灯罩的形状的实施例，优选是第一 和第二出光面间的分界平面与中空部 11的中心线垂直。 对于较大尺寸的 LED导光透镜适合于代替 LED灯泡的传统外罩，既作为外罩使用又 作为导光透镜使用， 如替代直径小于等于 45mm 的小型球泡灯或蜡烛灯的灯罩使用， 具 体实施例如图 7a和 7b所示； 对于较小尺寸的特别是球形的 LED导光透镜， 则可替代例 如是直径大于等于 50mm 的透明球泡灯或蜡烛灯的单体柱状透镜使用， 以获得更大的发 光角度， 具体实施例如图 8所示。 无论是将本实用新型的 LED导光透镜作为常规的导光透镜安装于外壳内使用， 还是 将其直接作为外壳使用，为了便于 LED导光透镜与用于承载 LED发光体的通常为散热体 的安装， 如图 4所示， 该中空部 11可包括形成中空部的开口 115的第一中空部 111和与 第一中空部相承接的第二中空部 112， 第二中空部 112相对第一中空部 111在与中空部的 中心线垂直的方向上向内偏移， 使二者之间形成内台阶面 113， 该内台阶面向开口 115的 方向凸设一用于与散热体上的卡槽相卡合的装卡件 114， 在此， 如图 9所示， 散热体上的 卡槽 5通常为围绕 LED发光体设置的一圈环形卡槽， 这样， 该装卡件 114也可为与之相 匹配的卡环， 或者为多个与之相匹配的卡快； 而如图 10所示， 散热体的另一种形式的卡 槽 5为围绕 LED发光体设置的例如是二个卡口， 则该装卡件 114为与卡口一一对应配置 的卡块。 如图 9所示， 将装卡件 114卡入携带 LED发光体的散热体的圆环形卡槽 5内， 并打胶固定， 即可完成本实用新型的 LED灯泡的主要的组装和固定步骤。 如图 10所示， 对于仅将本实用新型的 LED导光透镜作为透镜使用的情况， 需要将装卡件 114卡入散热 体的卡口中， 再将散热体和 LED导光透镜的组装体安装至灯头上， 最后安装上传统灯罩 即可。 以上所述仅为本实用新型较佳的实施方式，并非用来限定本实用新型的实施范围，但 凡在本实用新型的保护范围内所做的等效变化及修饰，皆应认为落入了本实用新型的保护 范围内。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of illumination, and relates to an LED light guiding lens that can be used only as a light guiding lens, and can also function as a light guiding lens and a lamp cover. BACKGROUND OF THE INVENTION LED bulbs commonly used in the market generally include an LED illuminator (including an LED lamp bead and an aluminum substrate), a heat sink, a driving circuit, a lamp cap, a lamp cover, and a light guiding lens for realizing light distribution. The existing light guiding lens is basically single. a cylindrical lens, as shown in FIG. 1, the unitary cylindrical lens generally includes a base for connecting an LED substrate, a cylindrical body extending upward from the base, and an inverted conical light-emitting surface formed at an upper end portion of the body. In the light exiting portion, since the existing light guiding lens has an unattractive surface shape for achieving the light distribution effect, there is currently no light guide lens in the market to replace the lamp cover, and it is used as both a light guiding lens and a lampshade. In addition, for the existing single-column lens shown in FIG. 1, the light emitted by the LED is transmitted upward through the cylindrical body to the light exiting portion, and after being refracted or reflected and refracted, the light is mainly emitted from the three regions, specifically Included is a vertical area substantially along the axis of the cylindrical body, a first annular area that is 60 degrees from the vertical area, and a second annular area that is at an angle of 60 degrees to the first annular area, and 1. The area of the second annular surface and the vertical area can be adjusted by adjusting the size of the cylindrical body and the light exiting portion, but the adjustment range is limited. Thus, the angle of the light emitted by the lamp post can reach about 240 degrees, but there is still a blind spot of 120 degrees, so that the coverage of the emitted light is not large enough; in addition, the emitted light is mainly concentrated in the above vertical area, that is, the concentrated light is mainly concentrated. In the area facing the light guiding lens, therefore, the outgoing light is concentrated and not uniform enough; further, for the light guiding lens of such a structure, on the one hand, it is impossible to ensure that the incident light is collected in the light guiding lens, and the other In view, the incident light needs to be re-emitted through the entire cylindrical body, so the light loss is large. SUMMARY OF THE INVENTION It is an object of the present invention to provide an LED light guiding lens that can be used at least as a light guiding lens on the one hand and as both a light guiding lens and a light cover on the other hand. The technical solution adopted by the utility model is: an LED light guiding lens comprising a lens body and a lens cover, wherein the lens body has an indented hollow portion for accommodating the LED illuminator, and an inner surface of the hollow portion a light incident surface of the LED light guiding lens; the lens body further has an indented concave surface, the lens cover is engaged with an outer surface of the lens body as a substantially light emitting surface, and the lens cover surrounds the invagin The light-emitting surface, the outer surface of the lens cover and the portion of the substantially light-emitting surface of the lens body that is not surrounded by the lens cover constitute a light-emitting surface of the LED light guide lens. Here, the design of the trapped light surface can increase the derivation light below the horizontal plane, so that the LED light guiding lens of the present invention has a more uniform light output, and if combined with a suitable shape of the light emitting surface, the existing single columnar light guiding lens can be compared with the existing single columnar light guiding lens. A larger angle of illumination is obtained. Wherein, the invading light surface is an inverted conical light emitting surface. Wherein, the light incident surface is a frosted surface, which makes the incident light more divergent, and further makes the light led out by the LED light guiding lens more uniform. Wherein, the lens body has an intrinsic light surface, the invading light surface and the hollow portion are disposed on the top and bottom of the lens body, and the center line of the invading light surface coincides with the center line of the hollow portion. For an LED light guiding lens having an intrinsic light surface, the center line of the invading light surface coincides with the center line of the hollow portion to make the most efficient use of the invading light surface. Wherein, the LED light guiding lens is a rotating body whose center line of the inner concave light surface and the hollow portion is a rotation center line. Wherein the hollow portion includes a first hollow portion forming an opening of the hollow portion and a second hollow portion receiving the first hollow portion, the second hollow portion being opposite to the first hollow portion in a direction perpendicular to a center line of the hollow portion The upper portion is offset inwardly to form an inner stepped surface between the first and second hollow portions, and the inner step protrudes toward the opening direction to form a card slot on the carrier (usually a heat sink) for the LED illuminator Engaged card. The first light-emitting surface includes a first light-emitting surface surrounding the opening of the invading light surface and a second light-emitting surface surrounding the opening of the hollow portion, and the first light-emitting surface is offset from the second light-emitting surface to make the first A step surface is formed between the second illuminating surface and the second illuminating surface; the opening edge of the lens cover is engaged with the step surface, so that the second illuminating surface and the outer surface of the lens cover smoothly transition at the joint. For LED light guide lenses with smooth illuminating surfaces, it is more suitable as an outer cover for LED bulbs to bring them closer to conventional housings, even in the same shape as conventional housings. Wherein, the first and second light-emitting surfaces are all part of a spherical surface, and the first and second light-emitting surfaces are concentric. a center of the first and second light-emitting surfaces is located at a boundary plane formed by an outer edge of the stepped surface between the first and second light-emitting surfaces On. The boundary plane between the first and second light exit surfaces is perpendicular to the center line of the hollow portion. All of the above technical features are advantageous for the design and manufacture of the lens body and the lens cover. The inner surface and the outer surface of each of the lens cover are equal in diameter to the diameters of the first and second light-emitting surfaces, respectively, and the first light-emitting surface completely conforms to the inner surface of the lens cover to make the lens The outer surface of the cover and the second light-emitting surface form a spherical surface as a light-emitting surface of the LED light guiding lens. Thus, on the one hand, if the LED light guide lens having the technical feature is used in place of the outer casing of the LED light bulb, the LED light bulb of the present invention can have the same appearance shape as the currently used LED bulb. In addition, the illuminating surface is designed as a spherical surface, and even if the lens body adopts an intrinsic illuminating surface, a larger angle of illuminating angle can be obtained with respect to the unitary lenticular lens. Wherein, the light-emitting surface is a spherical surface greater than 50% (the shape of the outer casing conventionally used in conventional bulbs is hemispherical), so that an exit angle of more than 150 degrees can be obtained; the light-emitting surface is especially spherical surface of 80% or more. In this way, an exit angle of more than 300 degrees can be obtained. Among them, in the case where the boundary plane formed by the outer edge of the stepped surface between the first and second light-emitting surfaces is perpendicular to the center line of the hollow portion, it is more advantageous to design the shape of the lens cover as the shape of the candle-shaped lamp cover. Thus, if the LED light guide lens having the technical feature is used in place of the outer casing of the LED light bulb, the LED light bulb of the present invention can have the same appearance shape as the currently used LED candle light. Another object of the present invention is to provide an LED light bulb including an LED illuminator and a lamp cover, wherein the lamp cover is the LED light guide lens described above, and the LED illuminator is housed in a hollow portion of the LED light guide lens, and The carrier of the LED bulb for carrying the LED illuminator is engaged with the splicing member provided on the inner wall of the hollow portion. That is, the LED light bulb of the present invention replaces the conventional lamp cover with the above-described LED light guiding lens, and it is no longer necessary to provide a light guiding lens built in the lamp housing. The utility model has the beneficial effects that: the LED light guiding lens of the utility model adopts the structure of the lens body and the lens cover which are joined together, so that it can be installed not only as a LED light guiding lens in a conventional LED light bulb, but also It replaces the lampshade of the traditional LED bulb, and integrates the light guiding lens and the lampshade, which not only simplifies the installation of the LED bulb, but also facilitates the heat dissipation of the LED lamp bead; in addition, if the LED light guiding lens of the present invention is to be used Designed to have a spherical surface and a candle shape with a certain surface area, a larger illumination angle can be obtained with respect to the existing unitary lenticular lens. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing the structure of a conventional unitary lenticular lens and the distribution of emitted light; FIGS. 2a and 2b are perspective views of different perspectives of an embodiment of an LED light guiding lens according to the present invention; 3 is a front view of the LED light guiding lens shown in FIGS. 2a and 2b; FIG. 4 is a cross-sectional view taken along line AA of FIG. 3; FIG. 5 is a view showing a distribution of light emitted from the LED light guiding lens shown in Figs. 2a and 2b; 6 is a front view showing another embodiment of the LED light guiding lens according to the present invention; FIGS. 7a and 7b respectively show the spherical and candle-shaped LED light guiding lens of the present invention in a small diameter of 35 mm. The application of the bulb lamp, wherein the LED light guiding lens is externally disposed, instead of the lamp cover of the LED bulb; FIG. 8 shows the application of the spherical LED light guiding lens of the present invention to a transparent bulb having a diameter of 55 mm, wherein The LED light guiding lens is built in, and is only used as a light guiding lens; FIG. 9 shows the main process of assembling the spherical LED light guiding lens shown in FIG. 7a as a cover, and assembling the LED lamp of the utility model; FIG. Using the spherical LED light guide shown in Figure 8 The main process of assembling an LED bulb with a built-in light guide lens instead of a single lenticular lens. 2a, 2b, 3, 4, and B, the LED light guiding lens of the present invention includes a lens body 1 and a lens cover 2, and the lens body 1 has an indentation for accommodating LED illumination. The hollow portion 11 of the body, such that the inner surface of the hollow portion 11 becomes the light incident surface of the LED light guiding lens, and the light incident surface can adopt a frosted surface; the lens body 1 further has an indented concave light emitting surface 12, Here, the intrinsic light exiting surface 12 is not limited to one, and is not limited to the inverted cone-shaped light exiting surface which is generally used at present, and the shape of the invading light surface can achieve the purpose of increasing the light output below the horizontal plane. That is, the lens cover 2 and the outer surface of the lens body 1 as a substantially light-emitting surface are joined by ultrasonic welding, for example. Here, it should be understood that the technical solution of the present invention does not exclude the structure in which the two are integrally formed. However, the processing of the structure is very difficult. The lens cover 2 surrounds all of the indented light-emitting surfaces 12, and the outer surface of the lens cover 2 and the portion of the substantially light-emitting surface of the lens body 1 that is not surrounded by the lens cover 2 are The light-emitting surface of the LED light guiding lens of the present invention is constructed. For the lens body shown in FIG. 4, only one recessed light surface 12 is provided. The recessed light surface is preferably disposed at the top and bottom of the lens body 1 with the hollow portion 11, and is recessed at the center line of the light surface 12. The LED light guiding lens of the present invention is a rotating body having a center line of the indentation light surface and the hollow portion as a rotation center line, and has an outer shape which is more suitable as a lamp cover. Here, if the lens body is provided with a plurality of intrinsic light exiting faces 12 (for example, three), the plurality of indented light exiting faces 12 may be uniformly arranged around the center line of the hollow portion 11 in the circumferential direction, for example, and each of the trapped light beams is trapped. The angle between the center line of the face 12 and the center line of the hollow portion 11 is preferably equal. This kind of structure is provided with a plurality of introgressed light-emitting surfaces 12, and the light-guiding angle can be increased for the light-guiding lens which is still cylindrical in the main body. As shown in FIGS. 3 and 4, the substantially light-emitting surface 14 of the lens body 1 (i.e., the outer surface of the lens body 1) includes a first light-emitting surface 141 surrounding the opening 121 of the invading light surface 12 and an opening 115 surrounding the hollow portion 11. The second light-emitting surface 142, the first light-emitting surface 141 is offset inwardly relative to the second light-emitting surface 142, so as to form a stepped surface 143 therebetween, wherein the stepped surface may be a plane, a slope or a partial protrusion. Or the structure of the pit; the opening edge of the lens cover 2 is engaged with the step surface 143 such that the second light-emitting surface 142 (i.e., the portion of the substantially light-emitting surface that is not surrounded by the lens cover 2) is joined to the outer surface of the lens cover 2 Smooth transitions, which facilitate the formation of a smooth exit surface or cover surface. As the first embodiment, the first and second light-emitting surfaces 141, 142 may be part of a spherical surface, and the first and second light-emitting surfaces 141, 142 are concentric. As a second embodiment, on the basis of the first embodiment, if the center of the first and second light-emitting surfaces 141, 142 is located on the boundary plane between the two, the boundary plane is the first and second light-emitting surfaces. A plane formed by the outer edge of the step surface 143, as shown in FIG. 4, the entire step surface 143 can be, but is not limited to, located on the boundary plane, the lens cover 2 can be designed as a hemispherical outer casing; Example 3, in addition to the first embodiment or the second embodiment, if the boundary plane between the first and second light-emitting surfaces is perpendicular to the center line of the hollow portion 11, even if the transparent cover 2 has other shapes, the present invention can be used. The light guide lens of the utility model is a standard rotary body in appearance. Under the conditions satisfying the first, second, and third embodiments, as shown in FIG. 4, the height of the second light-emitting surface 142 (the distance between the opening 115 of the hollow portion 11 and the boundary plane) is preferably equal to or greater than the radius of the spherical surface. 1/2, and the maximum height of the hollow portion 11 is preferably greater than the height of the second light-emitting surface 142 so as to extend into a portion of the lens body 1 surrounded by the first light-emitting surface 141, In this way, the incident light emitted by the LED illuminator can be largely collected into the light guiding lens, and the distance that the incident light needs to pass through the lens can be reduced, and the light loss can be reduced. The person skilled in the art can adjust according to the LED illuminator used. The diameter of the inlet 115 of the hollow portion 11. In the case where the conditions of Embodiments 1, 2, and 3 are satisfied, and the center line of the invading light surface 12 coincides with the center line of the hollow portion 11, as shown in FIG. 4, the height of the first light-emitting surface 141 (infrared light) The distance between the opening 121 of the surface 12 and the boundary plane may be greater than or equal to 1/2 of the radius of the spherical surface forming the second light-emitting surface 142; in addition, the maximum height of the recessed light-emitting surface 12 may be less than or equal to the height of the first light-emitting surface 141. 1/2, and the minimum distance between the hollow portion 11 and the invading light exit surface 12 may be less than or equal to 1/2 of the height of the first light exit surface 141. The lens cover 2 may be a spherical shell having an inner surface and an outer surface having diameters equal to the diameters of the first and second light-emitting surfaces 141, 142, respectively, such that the first light-emitting surface 141 is completely integral with the lens cover 2 when engaged. The surface is bonded to each other, and the light-emitting surface of the LED light guiding lens (including the outer surface of the lens cover 2 and the second light-emitting surface 142) is spherical. Thus, as shown in FIG. 7a, if the LED light guide lens having the above technical features is used in place of the outer casing of the LED light bulb, the LED light bulb of the present invention can have the same appearance shape as the currently used LED bulb. If the light-emitting surface of the LED light guiding lens of the present invention is designed to be larger than 50% of the spherical surface (the shape of the outer casing of the conventional bulb is conventionally hemispherical), the light-emitting angle of more than 150 degrees can be obtained; It can be seen that if the illuminating surface is designed to be 80% or more of the spherical surface, an exit angle of more than 300 degrees can be obtained, and thus it can be seen that the light guiding lens of this shape has a strong advantage over the conventional single lenticular lens. A person skilled in the art can adjust the ratio of the light-emitting surface of the LED light guiding lens to the complete spherical surface according to the diameter of the heat-dissipating body supporting the LED light-emitting body according to a conventional method; and adjust the sphere forming the second light-emitting surface 142 according to the size of the heat sink and the power size. diameter of. In addition, as shown in FIGS. 6 and 7b, the shape of the lens cover 2 may be a candle-type lamp cover (the candle-type lamp cover is a special term in the field of illumination, the shape of which is determinable in the field), and thus, if utilized The LED light guiding lens having the technical feature can replace the outer casing of the LED light bulb, so that the LED light bulb of the present invention has the same appearance shape as the currently used LED candle light. In the embodiment in which the transparent cover 2 is in the shape of a candle-shaped lamp cover, it is preferable that the boundary plane between the first and second light-emitting surfaces is perpendicular to the center line of the hollow portion 11. For a larger size LED light guide lens, it is suitable for replacing the traditional cover of the LED light bulb, and is used both as a cover and as a light guide lens, for example, instead of a small bulb or a candle lamp having a diameter of 45 mm or less, for example, for example, 7a and 7b; for a smaller size, especially spherical LED light guide lens, it can be used instead of a monocular lens such as a transparent bulb or a candle lamp with a diameter of 50 mm or more to obtain a larger The illumination angle is specifically shown in Fig. 8. Whether the LED light guiding lens of the present invention is used as a conventional light guiding lens in a housing, or is used directly as a housing, in order to facilitate the LED light guiding lens and the generally heat dissipating body for carrying the LED illuminating body Installation, as shown in FIG. 4, the hollow portion 11 may include a first hollow portion 111 forming an opening 115 of the hollow portion and a second hollow portion 112 receiving the first hollow portion, the second hollow portion 112 being opposite to the first hollow portion The portion 111 is offset inwardly in a direction perpendicular to the center line of the hollow portion to form an inner stepped surface 113 therebetween. The inner step protrudes in the direction of the opening 115 for engaging with the card slot on the heat sink. As shown in FIG. 9, the card slot 5 on the heat dissipating body is generally a ring-shaped annular card slot disposed around the LED illuminating body, so that the accommodating member 114 can also be The matching snap ring is fast for a plurality of matching cards; and as shown in FIG. 10, another form of the card slot 5 of the heat sink is, for example, two bayonet ports disposed around the LED illuminator. Then, the card loading member 114 is a card block corresponding to the bayonet one-to-one correspondence. As shown in FIG. 9, the card assembly 114 is inserted into the circular ring groove 5 of the heat sink carrying the LED illuminator, and is glued and fixed, thereby completing the main assembly and fixing steps of the LED bulb of the present invention. . As shown in FIG. 10, in the case where only the LED light guiding lens of the present invention is used as a lens, it is necessary to insert the mounting member 114 into the bayonet of the heat sink, and then assemble the heat sink and the LED light guiding lens. Install it on the lamp cap and finally install the traditional lamp cover. The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of implementation of the present invention, but equivalent changes and modifications made within the scope of the present invention should be considered as falling within the scope of the present invention. The scope of protection of utility models.

Claims

权利要求书 Claim
1. 一种 LED导光透镜， 其特征在于： 包括透镜体和透镜罩， 所述透镜体具有一内陷的 用于容置 LED发光体的中空部，所述中空部的内表面为 LED导光透镜的入光面； 所述透 镜体还具有内陷的内陷出光面， 所述透镜罩与透镜体的作为基本出光面的外表面相接合， 使透镜罩包围所述内陷出光面，所述透镜罩的外表面和透镜体的基本出光面的未被透镜罩 包围的部分构成 LED导光透镜的出光面。 An LED light guiding lens, comprising: a lens body and a lens cover, wherein the lens body has an indented hollow portion for accommodating the LED illuminator, and an inner surface of the hollow portion is an LED guide a light incident surface of the optical lens; the lens body further has an invading light-emitting surface, wherein the lens cover is coupled to an outer surface of the lens body as a substantially light-emitting surface, and the lens cover surrounds the in-situ light-emitting surface The outer surface of the lens cover and the portion of the substantially light-emitting surface of the lens body that is not surrounded by the lens cover constitute a light-emitting surface of the LED light guiding lens.
2. 根据权利要求 1所述的 LED导光透镜， 其特征在于： 所述入光面为磨砂面。 2. The LED light guiding lens according to claim 1, wherein the light incident surface is a frosted surface.
3. 根据权利要求 1所述的 LED导光透镜， 其特征在于： 所述内陷出光面为倒圆锥形出 光面。 3. The LED light guiding lens according to claim 1, wherein the invading light surface is an inverted conical light emitting surface.
4. 根据权利要求 1所述的 LED导光透镜， 其特征在于： 所述透镜体具有一个内陷出光 面，所述内陷出光面与中空部分设于透镜体的顶部和底部，且内陷出光面的中心线与中空 部的中心线重合。 4. The LED light guiding lens according to claim 1, wherein: the lens body has an intrinsic light surface, and the invading light surface and the hollow portion are disposed on the top and bottom of the lens body, and are recessed. The center line of the light exit surface coincides with the center line of the hollow portion.
5. 根据权利要求 4所述的 LED导光透镜， 其特征在于： 所述 LED导光透镜为以内陷出 光面和中空部的中心线为旋转中心线的回转体。 The LED light guiding lens according to claim 4, wherein the LED light guiding lens is a rotating body having a center line of the indented light surface and the hollow portion as a rotation center line.
6. 根据权利要求 1所述的 LED导光透镜， 其特征在于： 所述中空部包括形成中空部的 开口的第一中空部和与第一中空部相承接的第二中空部，第二中空部相对第一中空部在与 中空部的中心线垂直的方向上向内偏移，使第一和第二中空部之间形成内台阶面，所述内 台阶面向开口方向凸设一用于与 LED发光体的载体上的卡槽相卡合的装卡件。 The LED light guiding lens according to claim 1, wherein the hollow portion includes a first hollow portion forming an opening of the hollow portion and a second hollow portion receiving the first hollow portion, the second hollow portion The portion is offset inwardly with respect to the first hollow portion in a direction perpendicular to the center line of the hollow portion, such that an inner stepped surface is formed between the first and second hollow portions, and the inner step protrudes toward the opening direction for The card slot on the carrier of the LED illuminator is engaged with the card.
7. 根据权利要求 1至 6中任一项所述的 LED导光透镜， 其特征在于： 所述基本出光面 包括包围内陷出光面的开口的第一出光面和包围中空部的开口的第二出光面，所述第一出 光面相对第二出光面向内偏移，使第一和第二出光面之间形成一台阶面；所述透镜罩的开 口边沿与台阶面相接合，使第二出光面与透镜罩的外表面在接合处光滑过渡；所述第一和 第二出光面均为球面的一部分， 且第一和第二出光面共球心。 The LED light guiding lens according to any one of claims 1 to 6, wherein the basic light-emitting surface includes a first light-emitting surface surrounding an opening of the invading light surface and an opening surrounding the hollow portion a second light-emitting surface, the first light-emitting surface is offset from the second light-emitting surface, so that a step surface is formed between the first light-emitting surface and the second light-emitting surface; the opening edge of the lens cover is engaged with the step surface to make the second light-emitting surface The surface and the outer surface of the lens cover are smoothly transitioned at the joint; the first and second light-emitting surfaces are both part of a spherical surface, and the first and second light-emitting surfaces are concentric.
8. 根据权利要求 7所述的 LED导光透镜， 其特征在于： 所述透镜罩的均是球面的一部 分的内表面和外表面的直径分别与第一和第二出光面的直径相等，所述第一出光面完全与 透镜罩的内表面相贴合， 使透镜罩的外表面与第二出光面形成作为 LED导光透镜的出光 面的球面。 The LED light guiding lens according to claim 7, wherein: each of the lens covers is a spherical part The inner surface and the outer surface of the minute have the same diameter as the first and second light-emitting surfaces, respectively, and the first light-emitting surface completely conforms to the inner surface of the lens cover, so that the outer surface of the lens cover and the second light-emitting surface A spherical surface is formed as a light-emitting surface of the LED light guiding lens.
9. 根据权利要求 8所述的 LED导光透镜，其特征在于：所述出光面为大于 50%的球面。 9. The LED light guiding lens according to claim 8, wherein the light emitting surface is a spherical surface greater than 50%.
10. 根据权利要求 7所述的 LED导光透镜， 其特征在于： 由第一和第二出光面间的台阶 面的外边沿形成的分界平面与中空部的中心线垂直，所述透镜罩的形状为蜡烛型灯罩的形 状。 10. The LED light guiding lens according to claim 7, wherein: a boundary plane formed by an outer edge of the stepped surface between the first and second light-emitting surfaces is perpendicular to a center line of the hollow portion, the lens cover The shape is the shape of a candle-shaped lampshade.
PCT/CN2012/071911 2012-03-05 2012-03-05 Led light guide lens WO2013131227A1 (en)

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