WO2020094020A1 - 草坪灯灯头及草坪灯 - Google Patents

草坪灯灯头及草坪灯 Download PDF

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Publication number
WO2020094020A1
WO2020094020A1 PCT/CN2019/115772 CN2019115772W WO2020094020A1 WO 2020094020 A1 WO2020094020 A1 WO 2020094020A1 CN 2019115772 W CN2019115772 W CN 2019115772W WO 2020094020 A1 WO2020094020 A1 WO 2020094020A1
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WO
WIPO (PCT)
Prior art keywords
light
ring
lamp
led lamp
lawn
Prior art date
Application number
PCT/CN2019/115772
Other languages
English (en)
French (fr)
Inventor
刘超博
王洪波
卫庆军
Original Assignee
欧普照明股份有限公司
苏州欧普照明有限公司
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
Priority claimed from CN201821825860.9U external-priority patent/CN208935944U/zh
Priority claimed from CN201821900152.7U external-priority patent/CN208832261U/zh
Application filed by 欧普照明股份有限公司, 苏州欧普照明有限公司 filed Critical 欧普照明股份有限公司
Publication of WO2020094020A1 publication Critical patent/WO2020094020A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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
    • F21V1/00—Shades for light sources, i.e. lampshades for table, floor, wall or ceiling lamps
    • F21V1/12—Composite shades, i.e. shades being made of distinct parts
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design

Definitions

  • the present application relates to the technical field of lighting, in particular to a lawn lamp base and lawn lamp.
  • Lawn lights are widely used in parks and street scene lighting, which can improve the quality of night scenes.
  • the lawn lamp in the related art provides illumination through two different color LED lamp beads.
  • the light of white LED lamp beads is mainly used for lighting
  • the color LED lamp beads are mainly used to make the diffuser in the middle of the lawn lamp present a color effect.
  • the LED lights of the two colors have different functions and projection objects, in the related art, in order to prevent the light emitted by the LED lights of the two colors from being projected to other objects, some solutions use lenses to emit the LED lights The light is distributed to restrict its projection range.
  • an embodiment of the present application provides a lawn lamp base including a light source module, a light control element and a diffuse reflector;
  • the light source module includes a substrate, a first LED lamp bead and a second LED lamp bead
  • the first LED lamp beads and the second LED lamp beads are both arranged on the substrate, the first LED lamp beads are arranged in a ring to form a first lamp ring, and the second LED lamp beads are also in a ring shape Arranged to form a second lamp ring, the second lamp ring surrounds the periphery of the first lamp ring;
  • one end of the diffuse reflector is opposite to the middle of the first lamp ring, the other end of the diffuse reflector Extending away from the substrate;
  • the light control element includes a first shielding portion and a second shielding portion, both the first shielding portion and the second shielding portion are ring-shaped and the second shielding portion surrounds
  • the light control element cover is provided on the substrate, the first shield
  • an embodiment of the present application provides a lawn lamp including a lamp body and the lawn lamp holder, the lawn lamp holder is disposed on the lamp body.
  • an embodiment of the present application provides a lawn lamp base including a light source module and a transparent light guide cover;
  • the light source module includes a substrate and a first LED lamp bead, the first LED lamp bead is disposed on On the substrate, the first LED lamp beads are arranged in a ring shape to form a first lamp ring;
  • the light guide cover is a cylindrical structure extending along an axis, and both ends of the light guide cover are an incident end face and a far end, respectively An end surface, the incident end surface is perpendicular to the axis, and the light guide also has an inner peripheral surface facing the axis and an outer peripheral surface facing away from the axis, the outer peripheral surface extending along the axis, the The incident end face is opposite to the first lamp ring and enables the light emitted by the first LED lamp bead to be incident into the light guide hood from the incident end face;
  • the inner peripheral surface has one or more reflecting surfaces , The reflecting surface is used to totally reflect the light and reduce the incident
  • an embodiment of the present application provides a lawn lamp, including a lamp body and the lawn lamp holder, the lawn lamp holder is disposed on the lamp body.
  • FIG 1 is an overall view of the lawn lamp disclosed in the embodiment of the present application.
  • FIG. 2 is a perspective view of a light source module disclosed in an embodiment of the present application.
  • FIG. 3 is a cross-sectional light distribution view of a lawn lamp base with a flared diffuser disclosed in an embodiment of the present application;
  • FIG. 4 is a view of an assembly structure of a light source module, a horn-shaped diffuse reflector and a light control element disclosed in an embodiment of the present application;
  • FIG. 5 is a cross-sectional view of a lawn lamp base in which the diffuse reflector disclosed in the embodiment of the present application is a cylindrical mechanism;
  • FIG. 6 is a cross-sectional view of a lawn lamp base in which the diffuse reflector disclosed in the embodiment of the present application is a cylindrical mechanism and the height can be adjusted.
  • FIG. 7 is an exploded view of a lawn lamp base disclosed in an embodiment of the present application.
  • FIG. 8 is a cross-sectional perspective view of a lawn lamp base with a section of reflecting surface disclosed in an embodiment of the present application;
  • FIG. 9 is a light path diagram of the light guide cover in FIG. 8.
  • FIG. 10 is a cross-sectional perspective view of a lawn lamp base with a multi-section reflective surface disclosed in an embodiment of the present application;
  • FIG. 11 is a light path diagram of the light guide cover in FIG. 10.
  • 1-Lawn lamp base 10-Light source module, 100-substrate, 102-first LED lamp bead, 104-second LED lamp bead, 106-drive element, 11-diffuse reflector, 12-light control element, 120 -First shielding part / shielding slot, 1200-slot, 1202-slot bottom, 1202a-light hole, 1204-inner slot wall, 1206-outer slot wall, 122-second shielding part / shielding plate; 13-top Cover, 14-base; 2-lamp body.
  • the embodiment of the present application discloses a lawn lamp, as shown in FIGS. 1 to 4, including a lawn lamp base 1 and a lamp body 2, wherein the lawn lamp base 1 is a light emitting part of the lawn lamp, and includes a light source module 10 , Diffusive reflector 11 and light control element 12.
  • the lawn lamp base 1 may generally include components such as a top cover 13 and a base 14.
  • the lamp body 2 is a main body supporting structure, which is mainly used to lift and fix the lawn lamp base 1 to a certain height.
  • the lawn lamp base 1 and the lamp body 2 are fixed by a detachable connection, which is convenient for replacement.
  • the top cover 13 is disposed opposite to the base 14, the light source module 10 is fixed on the top cover 13, and the light source module 10 includes the substrate 100 and the first An LED lamp bead 102 and a second LED lamp bead 104, the first LED lamp bead 102 and the second LED lamp bead 104 can emit different colors, for example, the first LED lamp bead 102 emits colored light, and the second LED lamp bead 104 Glow white light.
  • the first LED lamp bead 102 and the second LED lamp bead 104 are both disposed on the substrate 100.
  • the first LED lamp bead 102 is arranged in a ring shape to form a first lamp ring
  • the second LED lamp bead 104 is also arranged in a ring shape to form a second
  • the lamp ring and the second lamp ring surround the periphery of the first lamp ring.
  • the first lamp ring and the second lamp ring are circular, but the first lamp ring and the second lamp ring in this embodiment may also be other shapes such as an elliptical ring and a square ring.
  • the diffuse reflector 11 is usually used as a component to increase the effect of the lawn lamp, and presents a more attractive visual effect through its shape and diffuse reflection of the light projected thereon.
  • One end of the diffuse reflector 11 is opposed to the middle of the first lamp ring, and the other end of the diffuse reflector 11 extends away from the substrate 100 until it approaches or reaches the base 14.
  • the lawn lamp base 1 may have a connecting post or a transparent cover.
  • the top cover 13 and the base 14 may be supported by the connecting post or the transparent cover, so the diffuse reflector 11 may be Only one of the top cover 13, the light source module 10 or the base 14 is fixedly connected.
  • both ends of the diffuse reflector 11 need to be fixedly connected to the light source module 10 and the base 14, respectively, so as to support the space between the top cover 13 and the base 14 (see FIG. 4).
  • the shape of the diffuse reflector 11 in this embodiment may be set according to needs, for example, the diffuse reflector 11 may be provided as a conical or trumpet-shaped structure widening away from the substrate 100 (see FIGS. 1, 3, and 4) , The visual effect is better.
  • the diffuse reflector 11 can also adopt a cylindrical structure such as a cylindrical or prismatic structure (see FIGS. 5 and 6). The cylindrical structure can be cut to any length as required, and can even be directly made into a retractable lawn lamp base ( (See Figure 6), so the product has wide applicability.
  • the light emitted by the first LED lamp beads 102 is mainly used to project onto the diffuse reflector 11 so that the diffuse reflector 11 presents a captivating visual effect
  • the light emitted by the second LED lamp beads 104 is mainly Used to project to the ground around the lawn lamp to make this area bright. Therefore, the functions of the first LED lamp bead 102 and the second LED lamp bead 104 are different. Moreover, if the light emitted by the first LED lamp bead 102 and the second LED lamp bead 104 are projected into the same area at the same time, it will cause light mixing, thereby destroying their respective effects.
  • the light control element 12 is used to restrict the projection range of the first LED lamp bead 102 and the second LED lamp bead 104, so as to prevent serious light mixing between the two.
  • the light control element 12 includes a first blocking portion 120 and a second blocking portion 122. Both the first blocking portion 120 and the second blocking portion 122 are ring-shaped and the second blocking portion 122 Surrounding the periphery of the first blocking portion 120, the light control element 12 is covered on the substrate 100, the first blocking portion 120 is opposite to the first lamp ring, and the second blocking portion 122 is opposite to the second lamp ring.
  • the first shielding portion 120 can restrict the projection range of the light emitted by the first LED lamp beads 102 by shielding.
  • the second shielding portion 122 also restricts the light emitted by the second LED lamp beads 104 by shielding Projection range.
  • the first shielding portion 120 and the second shielding portion 122 can be of any structural form, as long as they can block the light that needs to be shielded, so that the corresponding LED lamp beads can only project to a limited range, and cannot project beyond the limited range. can.
  • the respective projection ranges of the first LED lamp bead 102 and the second LED lamp bead 104 can be easily restricted, and the projection ranges of the two can be clearly distinguished, thereby effectively suppressing the light mixing problem.
  • the light emitted by the first LED lamp beads 102 can only be projected onto the diffuse reflector 11.
  • the light emitted by the second LED lamp beads 104 cannot be projected onto the diffuse reflector 11 at all or can only be projected onto a partial area of the diffuse reflector 11.
  • the light control element 12 restricts the projection range by blocking, the parameters such as the molding accuracy and the surface finish of the light control element 12 can be greatly reduced compared to the lens, so the cost saving effect is huge.
  • the reflection of light passing through the shielding portion may also be projected into other areas to cause light mixing.
  • the surfaces of the first shading portion 120 and the second shading portion 122 in this embodiment may be designed as Diffuse surface.
  • the diffuse reflection surface can disperse the light, thereby greatly reducing the energy of the light reflected to other areas, thereby reducing the light mixing.
  • the light emitted by LED lamp beads of the same color can be mixed, thereby reducing the light spot formed by a single LED lamp bead.
  • the annular area around the lawn lamp base 1 can emit light, and the light emitted by the first LED lamp bead 102 is diffused in a range of 360 °, the light emitted by the first LED lamp bead 102 may be too large due to the inclination angle
  • the diffuser 11 passes by and emits from the other side of the lawn lamp base 1, which will still cause light mixing. Therefore, in this embodiment, the constraint of the first shielding portion 120 on the first LED lamp bead 102 needs to be reflected at the same time.
  • the structure of the first shielding portion 120 may be a shielding groove structure, and the shielding groove 120 (for ease of description, the reference number of the first shielding portion is used below) has a notch 1200 ,
  • the groove bottom 1202 is provided with a light-transmitting hole 1202a.
  • the notch 1200 faces away from the substrate 100, and the first LED lamp bead 102 can be exposed through the through hole 1202a, at which time the light emitted by the first LED lamp bead 102 can only
  • the slot 1200 leaves the shielding slot 120, so that its projection range is restricted.
  • the position of the first LED lamp bead 102 can be closer to the outer groove wall 1206, so that the first LED lamp bead 102 is emitted from the side of the notch 1200 adjacent to the inner groove wall 1204
  • the light has a large inclination angle (relative to the direction perpendicular to the substrate 100), and can be projected to the position of the diffuse reflector 11 adjacent to the substrate 100, and the first LED lamp bead 102 approaches the side of the outer groove wall 1206 from the slot 1200
  • the emitted light has a small inclination angle, which can prevent the projection area of the first LED lamp bead 102 from exceeding the end of the diffuse reflector 11 away from the substrate 100.
  • the depth of the shielding groove 120 is preferably in the range of 10-20 mm.
  • the shielding groove may be a trapezoidal groove.
  • the second blocking portion 122 since the diffuse reflector 11 is entirely located in the middle of the lawn lamp base 1, the second blocking portion 122 only needs to block all the light cast by the second LED lamp beads 104 toward the middle to effectively prevent the second LED lamp beads 104 projects light into the projection area of the first LED lamp bead 102. Therefore, the structure of the second shielding part 122 can be relatively simplified.
  • a shielding baffle can be used as the second shielding part 122 in this embodiment.
  • the shielding baffle 122 (for convenience of description, the reference number of the second shielding part is used below) is composed of the first
  • the shielding portion 120 extends to the periphery and shields part of the light emitted by the second LED lamp beads 104.
  • the blocking range of the blocking plate 122 can be adjusted by its own length, tilt angle and other parameters to adapt to different lighting requirements.
  • the driving element may constitute a driving module alone, or may be integrated inside the light source module 10.
  • a driving element 106 is integrated inside the light source module 10, and the driving element 106 is disposed on the substrate 100 and located inside the first lamp ring.
  • the light control element 12 may further include an accommodating portion 124 that is surrounded by the first shielding portion 120 and forms an accommodating space with the substrate 100 to accommodate the driving element 106.
  • each part of the light control element 12 may be integrally formed to simplify the manufacturing and installation process.
  • the lawn lamp base and lawn lamp disclosed in the embodiments of the present application can greatly save costs.
  • the embodiment of the present application also discloses a lawn lamp, as shown in FIG. 1, including a lawn lamp base 1 and a lamp body 2, wherein the lawn lamp base 1 is a light emitting part of the lawn lamp and includes a light source module 10.
  • the lawn lamp base 1 may generally include components such as a top cover 11 and a base 12.
  • the lamp body 2 is a main body supporting structure, which is mainly used to lift and fix the lawn lamp base 1 to a certain height.
  • the lawn lamp base 1 and the lamp body 2 are fixed by a detachable connection, which is convenient for replacement.
  • the top cover 11 is disposed opposite to the base 12, the light source module 10 is fixed on the top cover 11, and the light source module 10 includes a substrate 100 and
  • the first LED lamp bead 102 in addition to the second LED lamp bead 104 can also be provided according to need, the first LED lamp bead 102 and the second LED lamp bead 104 can emit different colors, such as the first LED lamp bead 102 White light is emitted, and the second LED lamp beads 104 emit colorful light.
  • the first LED lamp bead 102 and the second LED lamp bead 104 are both disposed on the substrate 100.
  • the first LED lamp bead 102 is arranged in a ring shape to form a first lamp ring
  • the second LED lamp bead 104 is also arranged in a ring shape to form a second
  • the light ring, the second light ring is surrounded by the first light ring.
  • the first lamp ring and the second lamp ring are circular, but the first lamp ring and the second lamp ring in this embodiment may also be other shapes such as an elliptical ring and a square ring.
  • the lawn lamp base of this embodiment may also be provided with a diffuse reflector 13, which is usually used as a component to increase the effect of the lawn lamp, and is presented by its shape and diffuse reflection of the light projected on it To produce more attractive visual effects.
  • a diffuse reflector 13 is opposed to the middle of the second lamp ring, and the other end of the diffuse reflector 13 extends away from the substrate 100 until it approaches or reaches the base 12.
  • the lawn lamp base 1 may have a connecting post or a light guide cover, etc.
  • the top cover 11 and the base 12 may be supported by the connecting post or the light guide cover, so the diffuse reflector 13 may be Only one of the top cover 11, the light source module 10 or the base 12 is fixedly connected.
  • both ends of the diffuse reflector 13 need to be fixedly connected to the light source module 10 and the base 12 respectively, so as to support the space between the top cover 11 and the base 12 (see FIGS. 8 and 10 ).
  • the shape of the diffuse reflector 13 in this embodiment can be set according to needs.
  • the diffuse reflector 13 can be set as a conical or trumpet-shaped structure widening away from the substrate 100, which results in a better visual effect .
  • the diffuse reflector 13 can also adopt a cylindrical structure such as a cylindrical or prismatic structure. The cylindrical structure can be cut to any length as required, and can even be directly made into a retractable lawn lamp base, so the product has a wide range of applicability.
  • the light emitted by the first LED lamp bead 102 is mainly used to project to the ground around the lawn lamp to make this area bright, while the light emitted by the second LED lamp bead 104 is mainly used to project to the diffuse On the reflector 13, the diffuse reflector 13 presents a captivating visual effect. Therefore, the roles of the first LED lamp bead 102 and the second LED lamp bead 104 are different. If the light from the first LED lamp bead 102 and the light from the second LED lamp bead 104 are projected onto the diffuse reflector 13 at the same time, it will cause mixed light, thereby destroying the effect of colored light.
  • the lawn lamp base 1 in this embodiment further includes a light guide cover 14.
  • the light guide cover 14 has a cylindrical structure extending along the axis a.
  • the two ends of the light guide cover 14 are the incident end surface 14a and the distal end surface 14b, respectively.
  • the incident end surface 14a is perpendicular to the axis a, and the light guide cover 14 also has an axis
  • the inner peripheral surface 14c of a and the outer peripheral surface 14d facing away from the axis a extend along the axis, and therefore form an angle of 90 ° with the incident end surface 14a.
  • the incident end surface 14a is opposite to the first lamp ring, so the light emitted by the first LED lamp bead 102 can enter the light guide cover 14 from the incident end surface 14a.
  • the distal end surface 14b of the light guide cover 14 may be supported by the base 12 so as to keep the position of the light guide cover 14 fixed.
  • the light emitted by the first LED lamp bead 102 enters the light guide cover 14 from the incident end surface 14a.
  • the angle of refraction of the light refracted by the incident end surface 14a into the light guide cover 14 also varies. Assuming that the critical angle at which light rays are refracted by the light guide cover 14 is ⁇ , the range of refraction angles of light rays refracted by the incident end face 14a into the light guide cover 14 is 0 ° to ⁇ .
  • this embodiment is provided with a reflective surface 140 on the inner peripheral surface 14c.
  • the reflective surface 140 can totally reflect the light and prevent the light from penetrating the reflective surface 140 and entering the lawn lamp In the interior of the base 1, the reflecting surface 140 can also reduce the incident angle of the light reflected to the outer peripheral surface 14d while reflecting. When the incident angle decreases below the critical angle ⁇ , the light can be refracted by the outer peripheral surface 14d.
  • the reflection surface 140 may be arranged such that the reflection surface 140 gradually approaches the outer peripheral surface 14d from the side near the incident end surface 14a to the side near the distal end surface 14b in the cross-section of the axis a. This structure causes the normal of the reflecting surface 140 to incline toward the incident end surface 14a.
  • the inclination angle of the normal at a certain position on the reflecting surface 140 is x.
  • the incident angle irradiated to the reflective surface 140 will be reduced by x relative to the plane extending along the axis a.
  • the angle of the incident light with respect to the normal is the same, so when the reflected light reaches the outer peripheral surface 14d, its incident angle with respect to the outer peripheral surface 14d will become b-2x. If b-2x is smaller than the critical angle ⁇ at this time, the light can be directly emitted from the outer peripheral surface. If b-2x is still larger than the critical angle ⁇ , the light will still be totally reflected by the outer peripheral surface 14d.
  • the angle of incidence of the reflected light with respect to the outer peripheral surface will become b-4x, and so on, and each reflection of the reflective surface 140 can make the light
  • the incident angle is reduced by 2x
  • the incident angle of the light with respect to the outer peripheral surface 14d can finally be made smaller than the critical angle ⁇ and emitted from the outer peripheral surface 14d.
  • the inner peripheral surface 14c may have only one section of the reflective surface 140. At this time, the reflective surface 140 may occupy most or all of the inner peripheral surface 14c.
  • the reflection surface 140 may have a straight configuration or a curved configuration in a cross section passing through the axis a (see FIGS. 8 and 9). This structure is relatively simple and easy to manufacture, but as it gradually moves away from the incident end face 14a, the thickness of the light guide cover 14 will become thinner and thinner, which may result in a decrease in strength.
  • the angle x of the normal of the reflective surface 140 is equal to the angle between the reflective surface 140 and the axis a. According to the above-mentioned deduction, as long as the angle x between the reflecting surface 140 and the axis a is not zero, the incident angle of the light ray with respect to the outer peripheral surface 14d must eventually be smaller than the critical angle ⁇ .
  • the incident angle of the light on the reflecting surface 140 needs to meet the requirement of total reflection, that is, the incident angle of the light with respect to the reflecting surface 140 is greater than the critical angle ⁇ . If the reflecting surface 140 extends along the axis a, the incident angle of the light irradiated on the reflecting surface 140 is the same as the outer peripheral surface 14d, and will also be in the range of 90 ° - ⁇ to 90 °, thereby ensuring the total reflection effect.
  • the reflecting surface 140 in this embodiment needs to be inclined with respect to the axis a, the incident angle of the light irradiated on the reflecting surface 140 will also decrease accordingly, the degree of reduction is the angle between the reflecting surface 140 and the axis a x.
  • the incident angle must not be less than the critical angle ⁇ , that is 90 ° - ⁇ -x ⁇ , so x ⁇ 90 ° -2 ⁇ . Therefore, the angle x between the reflecting surface 140 and the axis a in this embodiment satisfies 0 ° ⁇ x ⁇ (90 ° -2 ⁇ ).
  • the inclination angle of the normal line at a certain position of the reflective surface 140 is equal to the angle between the tangent line at that position and the axis a.
  • the angle between the tangent line and the axis a is expressed as y.
  • the angle y between the tangent line and the axis a at any position on the reflecting surface satisfies: 0 ° ⁇ y ⁇ (90 ° -2 ⁇ ).
  • the inner peripheral surface 14c may also have multiple sections of reflective surfaces 140 at the same time.
  • the multi-segment reflection surfaces 140 are sequentially arranged along the axis a, and the adjacent two reflection surfaces 140 are connected by a section of connection surface 142, and the one section of reflection surface 140 and the section of connection surface 142 form a zigzag surface.
  • the thickness of the inner peripheral surface 14c can be maintained, which is beneficial to improve the structural strength of the inner peripheral surface 14c.
  • the length of the connecting surface 142 in the cross-section through the axis a may be smaller than the length of the reflecting surface 140. In this way, the area of the reflecting surface 140 can be increased to improve the reflection effect, and at the same time, the angle of the connecting surface 142 can be controlled so that it does not refract light.
  • the lawn lamp base and lawn lamp disclosed in the embodiments of the present application can effectively prevent the light emitted by the first LED lamp beads 102 from irradiating the interior of the lawn lamp.

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  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

一种草坪灯灯头及草坪灯。草坪灯灯头（1）包括光源模组（10）、控光元件（12）以及漫反射器（11）；光源模组（10）包括基板（100）、第一LED灯珠（102）以及第二LED灯珠（104），第一LED灯珠（102）以及第二LED灯珠（104）均设置在基板（100）上且分别组成第一灯环以及第二灯环；漫反射器（11）的一端与第一灯环的中部相对，另一端向远离基板（100）的方向延伸；控光元件（12）包括第一遮挡部（120）以及第二遮挡部（122），控光元件（12）罩设在基板（100）上，第一遮挡部（120）与第一灯环相对，第二遮挡部（122）与第二灯环相对；第一遮挡部（120）约束第一LED灯珠（102）所发出的光线的投射范围，第二遮挡部（122）约束第二LED灯珠（104）所发出的光线的投射范围。草坪灯包括灯身（2）以及草坪灯灯头（1），草坪灯灯头（1）设置在灯身（2）上。

Description

草坪灯灯头及草坪灯
交叉引用
本实用新型要求在2018年11月05日提交至中国专利局、申请号为201821825860.9、实用新型名称为“草坪灯灯头及草坪灯”的中国实用新型专利的优先权，以及在2018年11月19日提交至中国专利局、申请号为201821900152.7、实用新型名称为“草坪灯灯头及草坪灯”的专利申请的优先权，该申请的全部内容通过引用结合在本实用新型中。
技术领域
本申请涉及照明技术领域，尤其涉及一种草坪灯灯头及草坪灯。
背景技术
草坪灯广泛用于公园以及街景照明，能够提高夜景质量。为了使草坪灯具备良好的视觉效果以及照明效果，相关技术中的草坪灯通过两种不同颜色的LED灯珠提供照明。其中白色LED灯珠的光线主要用于照明，而彩色LED灯珠则主要用于使草坪灯中部的漫反射器呈现出彩色效果。
由于两者颜色的LED灯珠分别具有不同的功能以及投射对象，相关技术中，为了防止两种颜色的LED灯珠所发出的光线投射至其它对象，一些方案采用透镜对LED灯珠所发出的光线进行配光，从而约束其投射范围。
然而，由于透镜需要较高的成型精度以及表面光洁度，因此生产成本很高。
实用新型内容
本申请实施例采用下述技术方案：
第一方面，本申请实施例提供了一种草坪灯灯头，包括光源模组、控光元件以及漫反射器；所述光源模组包括基板、第一LED灯珠以及第二LED灯珠，所述第一LED灯珠以及所述第二LED灯珠均设置在所述基板上，所述第一LED灯珠呈环状排列组成第一灯环，所述第二LED灯珠也呈环状排列组成第二灯环，所述第二灯环围绕在所述第一灯环的外围；所述漫反射器的一端与所述第一灯环的中部相对，所述漫反射器的另一端向远离所述基板的方向延伸；所述控光元件包括第一遮挡部以及第二遮挡部，所述第一遮挡 部以及所述第二遮挡部均呈环状且所述第二遮挡部围绕在所述第一遮挡部的外围，所述控光元件罩设在基板上，所述第一遮挡部与所述第一灯环相对，所述第二遮挡部与所述第二灯环相对；所述第一遮挡部约束所述第一LED灯珠所发出的光线的投射范围，所述第二遮挡部约束所述第二LED灯珠所发出的光线的投射范围。
第二方面，本申请实施例提供了一种草坪灯包括灯身以及所述的草坪灯灯头，所述草坪灯灯头设置在所述灯身上。
第三方面，本申请实施例提供了一种草坪灯灯头，包括光源模组以及透明的导光罩；所述光源模组包括基板以及第一LED灯珠，所述第一LED灯珠设置在所述基板上，所述第一LED灯珠呈环状排列组成第一灯环；所述导光罩呈沿轴线延伸的筒状结构，所述导光罩的两端分别为入射端面以及远端面，所述入射端面垂直于所述轴线，同时所述导光罩还具有朝向所述轴线的内周面以及背离所述轴线的外周面，所述外周面沿所述轴线延伸，所述入射端面与所述第一灯环相对并使所述第一LED灯珠所发出的光线能够由所述入射端面射入所述导光罩内部；所述内周面上具有一段或多段反射面，所述反射面用于对光线进行全反射并减小反射至所述外周面的光线的入射角。
第四方面，本申请实施例提供了一种草坪灯，包括灯身以及所述的草坪灯灯头，所述草坪灯灯头设置在所述灯身上。
附图说明
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1为本申请实施例公开的草坪灯的整体视图；
图2为本申请实施例公开的光源模组的立体视图；
图3为本申请实施例公开的漫反射器为喇叭形结构的草坪灯灯头的截面配光视图；
图4为本申请实施例公开的光源模组、喇叭形结构的漫反射器以及控光元件的装配结构视图；
图5为本申请实施例公开的漫反射器为柱形机构的草坪灯灯头的截面视图；
图6为本申请实施例公开的漫反射器为柱形机构且可调节高度的草坪灯灯头的截面视图。
图7为本申请实施例公开的草坪灯灯头的爆炸视图；
图8为本申请实施例公开的具有一段反射面的草坪灯灯头的剖视立体图；
图9为图8中的导光罩的光路图；
图10为本申请实施例公开的具有多段反射面的草坪灯灯头的剖视立体图；
图11为图10中的导光罩的光路图。
附图标记说明：
1-草坪灯灯头、10-光源模组、100-基板、102-第一LED灯珠、104-第二LED灯珠、106-驱动元件、11-漫反射器、12-控光元件、120-第一遮挡部/遮挡槽、1200-槽口、1202-槽底、1202a-通光孔、1204-内槽壁、1206-外槽壁、122-第二遮挡部/遮挡板；13-顶盖、14-底座；2-灯身。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合本申请具体实施例及相应的附图对本申请技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
以下结合附图，详细说明本申请各实施例提供的技术方案。
本申请实施例公开了一种草坪灯，如图1至图4所示，包括草坪灯灯头1以及灯身2，其中，草坪灯灯头1是草坪灯的发光部分，集中了包含光源模组10、漫反射器11以及控光元件12。除此之外，为了起到装配以及保护效果，草坪灯灯头1通常还可包括顶盖13以及底座14等部件。灯身2是主体支撑结构，主要用于将草坪灯灯头1托举至一定高度并对其进行固定。草坪灯灯头1与灯身2之间采用可拆卸连接的方式进行固定，便于更换。
具体地，参见图2至图4，本实施例中的草坪灯灯头1中，顶盖13与底座14相对设置，光源模组10固定在顶盖13上，光源模组10包括基板100、第一LED灯珠102以及第二LED灯珠104，第一LED灯珠102与第二LED灯珠104可以分别发出不同的颜色，例如第一LED灯珠102发出彩光，第二LED灯珠104发出白光。第一LED灯珠102与第二LED灯珠104均设置在基板100上，第一LED灯珠102呈环状排列组成第一灯环，第二LED灯珠104也呈环状排列组成第二灯环，第二灯环围绕在第一灯环的外围。通常情况下，第一灯环与第二灯环为圆环，但本实施例中的第一灯环与第二灯环也可以为其为椭圆环、方环等其它形状。
漫反射器11通常作为增加草坪灯效果的部件，通过自身形状以及对投射到其上的光线进行漫反射而呈现出更为迷人的视觉效果。漫反射器11的一端与第一灯环的中部相对，漫反射器11的另一端向远离基板100的方向延伸，直至临近或到达底座14。在一些实施例中，草坪灯灯头1可以具有连接柱或者透光罩等部件，这些实施例中顶盖13与底座14可以通过连接柱或者透光罩进行支撑，因此此时漫反射器11可以仅与顶盖13、光源模组10或者底座14其中一者固定连接。而在另一些实施例中，漫反射器11的两端需要分别与光源模组10以及底座14固定连接，从而起到支撑顶盖13与底座14之间空间的作用(参见图4)。
本实施例中的漫反射器11的形状可以根据需要进行设置，例如，漫反射器11可以设置为朝远离基板100的方向渐阔的圆锥形或喇叭形结构(参见图1、3、4)，其所形成的视觉效果较好。或者，漫反射器11也可以采用圆柱形、棱柱形等柱形结构(参见图5、图6)，柱形结构可以根据需要截取任意长度，甚至可以直接制作为可伸缩式的草坪灯灯头(参见图6)，因此产品适用性广泛。
在本实施例中，第一LED灯珠102所发出的光线主要用于投射至漫反射器11上使漫反射器11呈现出迷人的视觉效果，而第二LED灯珠104所发出的光线主要用于投射至草坪灯周围地面使这片区域变得明亮。因此，第一LED灯珠102与第二LED灯珠104的作用是不同的。并且，如果第一LED灯珠102与第二LED灯珠104所发出的光线同时投射到同一区域内，则会造成混光，从而破坏各自的效果。
为了避免上述问题，本实施例通过控光元件12对第一LED灯珠102与第二LED灯珠104的投射范围进行约束，防止二者造成严重混光。具体地， 如图3和图4所示，控光元件12包括第一遮挡部120以及第二遮挡部122，第一遮挡部120以及第二遮挡部122均呈环状且第二遮挡部122围绕在第一遮挡部120的外围，控光元件12罩设在基板100上，第一遮挡部120与第一灯环相对，第二遮挡部122与第二灯环相对。第一遮挡部120可以通过遮挡的方式约束第一LED灯珠102所发出的光线的投射范围，同样的，第二遮挡部122也通过遮挡的方式约束第二LED灯珠104所发出的光线的投射范围。
第一遮挡部120与第二遮挡部122可以为任何结构形式，只要能够将所需要遮挡的光线遮挡住，使相应地LED灯珠只能够投射至限定范围，而无法投射至限定范围之外即可。通过这种方式能够简便地约束第一LED灯珠102与第二LED灯珠104各自的投射范围，将二者的投射范围明显区分开，从而有效抑制混光问题。例如，本实施例中，在第一遮挡部120的约束下可以实现使第一LED灯珠102所发出的光线仅能够投射至漫反射器11上。而在第二遮挡部122的约束下可以实现使第二LED灯珠104所发出的光线完全无法投射至漫反射器11上或者仅能够投射至漫反射器11的部分区域。
并且，因为控光元件12约束投射范围的方式是通过遮挡，因此控光元件12的成型精度以及包面光洁度等参数要求相较于透镜均可大幅降低，因此对成本的节约效果是巨大的。
在本实施例中，光线经过遮挡部的反射也有可能投射到其它区域造成混光，为了减小这种影响，本实施例中的第一遮光部120和第二遮光部122的表面可以设计为漫反射面。漫反射面可以将光线打散，从而大幅降低反射至其他区域的光线能量，从而减小混光。此外，通过这种方式还可以使同种颜色的LED灯珠所发出的光线进行混光，从而降低单颗LED灯珠所形成的光斑。
由于草坪灯灯头1的四周环形区域均能够出光，而第一LED灯珠102所发出的光线又是360°范围扩散的，因此第一LED灯珠102所发出的光线有可能因倾斜角度过大而由漫反射器11的旁边经过并从草坪灯灯头1的另一侧射出，这样依然会造成混光，因此本实施例中第一遮挡部120对第一LED灯珠102的约束需要同时体现在内侧以及外侧两个方向上，本实施例中，第一遮挡部120的结构可以为遮挡槽结构，遮挡槽120(为了便于描述，下面沿用第一遮挡部的附图标记)具有槽口1200、槽底1202、内槽壁1204以及外槽壁1206，槽口1200与槽底1202相对，内槽壁1204以及外槽壁1206分别由两侧连接槽口1200以及槽底1202，其中外槽壁1206围绕在内槽壁1204 的外围。在槽底1202上设置有通光孔1202a。
当控光元件12与光源模组10装配在一起时，槽口1200背离基板100，第一LED灯珠102能够由通光孔1202a露出，此时第一LED灯珠102所发出的光线仅能够由槽口1200离开遮挡槽120，从而使其投射范围受到约束。
本实施例中，相对于内槽壁1204，第一LED灯珠102的设置位置可以更加接近外槽壁1206，这样第一LED灯珠102由槽口1200临近内槽壁1204的一侧所射出的光线具有较大的倾斜角(相对于垂直基板100的方向)，可以投射至漫反射器11临近基板100的位置，而第一LED灯珠102由槽口1200临近外槽壁1206的一侧所射出的光线具有较小的倾斜角，可以防止第一LED灯珠102的投射区域超出漫反射器11远离基板100的一端。
对于常见尺寸的草坪灯灯头尺寸而言，为了形成适合的倾斜角度，遮挡槽120的深度在10～20mm范围内较为适宜。此外，出于节约材料以及制造的便捷性等考虑，遮挡槽可以为梯形槽。
在本实施例中，由于漫反射器11整体位于草坪灯灯头1的中部，因此第二遮挡部122只需将第二LED灯珠104投向中部的光线全部遮挡便可有效防止第二LED灯珠104将光线投射到第一LED灯珠102的投射区域内。因此第二遮挡部122的结构可以相对简化，例如本实施例可以采用一块遮挡板作为第二遮挡部122，遮挡板122(为了便于描述，下面沿用第二遮挡部的附图标记)由第一遮挡部120向外围延伸，并遮挡第二LED灯珠104所发出的部分光线。遮挡板122的遮挡范围可以通过其自身长度、倾斜角度等参数进行调整，以适应不同的照明需求。
对于草坪灯而言，为了使LED灯珠能够正常工作，通常还需要设置驱动元件。驱动元件可以单独组成驱动模组，也可以集成在光源模组10内部。如图2和图4所示，本实施例为了节约空间，在光源模组10的内部集成了驱动元件106，驱动元件106设置在基板100上且位于第一灯环的内部。为了对驱动元件106进行避让以及保护，控光元件12还可包括容纳部124，容纳部124被第一遮挡部120所环绕并与基板100形成收容空间收容驱动元件106。
在本实施例中，控光元件12的各部分可以一体成型，以简化制造以及安装过程。
综上所述，本申请实施例公开的草坪灯灯头及草坪灯能够大幅节约成本。
本申请实施例还公开了一种草坪灯，如图1所示，包括草坪灯灯头1以 及灯身2，其中，草坪灯灯头1是草坪灯的发光部分，包含光源模组10。除此之外，为了起到装配以及保护效果，草坪灯灯头1通常还可包括顶盖11以及底座12等部件。灯身2是主体支撑结构，主要用于将草坪灯灯头1托举至一定高度并对其进行固定。草坪灯灯头1与灯身2之间采用可拆卸连接的方式进行固定，便于更换。
具体地，参见图7、8、10，本实施例中的草坪灯灯头1中，顶盖11与底座12相对设置，光源模组10固定在顶盖11上，光源模组10包括基板100以及第一LED灯珠102，除此之外根据需要还可以设置第二LED灯珠104，第一LED灯珠102与第二LED灯珠104可以分别发出不同的颜色，例如第一LED灯珠102发出白光，第二LED灯珠104发出彩光。第一LED灯珠102与第二LED灯珠104均设置在基板100上，第一LED灯珠102呈环状排列组成第一灯环，第二LED灯珠104也呈环状排列组成第二灯环，第二灯环被第一灯环围绕。通常情况下，第一灯环与第二灯环为圆环，但本实施例中的第一灯环与第二灯环也可以为其为椭圆环、方环等其它形状。
除此之外，本实施例的草坪灯灯头内还可以设置漫反射器13，漫反射器13通常作为增加草坪灯效果的部件，通过自身形状以及对投射到其上的光线进行漫反射而呈现出更为迷人的视觉效果。漫反射器13的一端与第二灯环的中部相对，漫反射器13的另一端向远离基板100的方向延伸，直至临近或到达底座12。在一些实施例中，草坪灯灯头1可以具有连接柱或者导光罩等部件，这些实施例中顶盖11与底座12可以通过连接柱或者导光罩进行支撑，因此此时漫反射器13可以仅与顶盖11、光源模组10或者底座12其中一者固定连接。而在另一些实施例中，漫反射器13的两端需要分别与光源模组10以及底座12固定连接，从而起到支撑顶盖11与底座12之间空间的作用(参见图8和图10)。
本实施例中的漫反射器13的形状可以根据需要进行设置，例如，漫反射器13可以设置为朝远离基板100的方向渐阔的圆锥形或喇叭形结构，其所形成的视觉效果较好。或者，漫反射器13也可以采用圆柱形、棱柱形等柱形结构，柱形结构可以根据需要截取任意长度，甚至可以直接制作为可伸缩式的草坪灯灯头，因此产品适用性广泛。
在本实施例中，第一LED灯珠102所发出的光线主要用于投射至草坪灯周围地面使这片区域变得明亮，而第二LED灯珠104所发出的光线主要用于投射至漫反射器13上使漫反射器13呈现出迷人的视觉效果。因此，第一LED 灯珠102与第二LED灯珠104的作用是不同的。如果第一LED灯珠102的光线与第二LED灯珠104所发出的光线同时投射到漫反射器13上，则会造成混光，从而破坏彩光的效果。
为了避免上述问题，如图7至11所示，本实施例中的草坪灯灯头1内部还包括导光罩14。导光罩14呈沿轴线a延伸的筒状结构，导光罩14的两端分别为入射端面14a以及远端面14b，其中入射端面14a垂直于轴线a，同时导光罩14还具有朝向轴线a的内周面14c以及背离轴线a的外周面14d，外周面14d沿轴线延伸，因此其与入射端面14a之间呈90°夹角。入射端面14a与第一灯环相对，因此第一LED灯珠102所发出的光线能够由入射端面14a射入导光罩14内部。导光罩14的远端面14b可以被底座12支撑，从而使导光罩14的位置保持固定。
第一LED灯珠102所发出的光线会由入射端面14a进入导光罩14内。根据不同材料折射率的差异，由入射端面14a折射进入导光罩14内的光线的折射角也各有不同。假设光线由导光罩14折射出去的临界角为α，则由入射端面14a折射进入导光罩14内的光线的折射角的范围为0°至α。
这些光线会在导光罩14内部继续沿直线传播。在本实施例中，由于外周面14d与入射端面14a相互垂直，因此由入射端面14a射入的光线传播至外周面14d时相对于外周面14d的入射角与折射角为互余关系，因此这些光线相对于外周面14d的入射角处于90°-α至90°范围内，由于α必然小于45°，因此这些光线无法由外周面14d出射，而是会被外周面14d全反射向内周面14c。如果内周面14c与外周面14d平行，则光线也无法由内周面14c射出，而是会在内周面14c与外周面14d之间往复反射，直至到达远端面14b。
为了避免上述情况，使光线能够由外周面14d出射，本实施例在内周面14c上设置有反射面140，反射面140可以对光线进行全反射，防止光线穿透反射面140进入到草坪灯灯头1的内部，同时反射面140还可以在反射的同时减小反射至外周面14d的光线的入射角，当入射角减小至临界角α以下时，光线便可由外周面14d折射出去。
在本实施例中，可以将反射面140设置为在过轴线a的截面内反射面140由临近入射端面14a的一侧至临近远端面14b的一侧逐渐靠近外周面14d。这种结构导致反射面140的法线发生朝向入射端面14a的倾斜。
假设反射面140某一位置处法线的倾斜角度为x。当一束光线以入射角b照射至反射面140时，相对于照射至沿轴线a延伸的平面，照射至反射面140 的入射角会减少x，经过反射面140反射后所形成的反射光线与入射光线相对于法线的夹角相同，因此待该反射光线抵达外周面14d时，其相对于外周面14d的入射角将会变为b-2x。若此时b-2x小于临界角α，则光线可以直接由外周面出射，若b-2x仍然大于临界角α，则光线仍然会被外周面14d全反射。待全反射后的光线再次传递至反射面140后，其所形成的反射光线相对于外周面的入射角会变为b-4x，以此类推，反射面140的每次反射均可以使光线的入射角减小2x，最终便可以使光线相对于外周面14d的入射角小于临界角α而由外周面14d射出。
在本实施例中，内周面14c上可以仅具有一段反射面140，此时反射面140可以占用内周面14c的大部分甚至全部区域。并且，反射面140在过轴线a的截面内可以为直线构型也可以为曲线构型(参见图8和图9)。这种结构较为简单，易于制造，但随着逐渐远离入射端面14a，导光罩14的厚度会越来越薄，可能导致强度下降。
当反射面140在过轴线a的截面内为直线构型时，反射面140的法线的倾斜角度x等于反射面140与轴线a的夹角。根据上述推倒，只要反射面140与轴线a之间的夹角x不为零，则最终必然可以使光线相对于外周面14d的入射角小于临界角α。
由于反射面140通过全反射原理反射光线，因此反射面140上光线的入射角需要满足全反射要求，即光线相对于反射面140的入射角要大于临界角α。如果反射面140沿轴线a延伸，则照射至反射面140上的光线的入射角与外周面14d相同，也将处于90°-α至90°范围内，从而保证全反射效果。然而由于本实施例中的反射面140需要相对于轴线a倾斜，因此照射至反射面140上的光线的入射角也会相应减小，减小的程度即为反射面140与轴线a的夹角x。为了保证全反射效果，入射角最小不能小于临界角α，即90°-α-x≥α，因此x≥90°-2α。因此，本实施例中的反射面140与轴线a的夹角x满足0°＜x≤(90°-2α)。
同样的，当反射面140在过轴线a的截面内为曲线时，反射面140某一位置的法线的倾斜角等于该位置处的切线与轴线a的夹角。将切线与轴线a的夹角以y表示，则为了保证全反射效果，反射面任意位置的切线与轴线a的夹角y满足：0°＜y≤(90°-2α)。
如图10和图11所示，本实施例中内周面14c上也可以同时具有多段反射面140。多段反射面140沿轴线a依次排布，相邻两个反射面140之间由 一段连接面142连接，一段反射面140与一段连接面142构成一个锯齿面。这样可以保持内周面14c的厚度，有利于提高内周面14c的结构强度。在该实施例中，在过轴线a的截面内连接面142的长度可以小于反射面140的长度。这样既可以增加反射面140的面积，提高反射效果，同时也能够控制连接面142的角度，使其不会折射光线。
综上所述，本申请实施例公开的草坪灯灯头及草坪灯能够有效防止第一LED灯珠102所射出的光线照射至草坪灯的内部。
本申请上文实施例中重点描述的是各个实施例之间的不同，各个实施例之间不同的优化特征只要不矛盾，均可以组合形成更优的实施例，考虑到行文简洁，在此则不再赘述。
以上所述仅为本申请的实施例而已，并不用于限制本申请。对于本领域技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。

Claims (20)

  1. 一种草坪灯灯头，其中，包括光源模组、控光元件以及漫反射器；
    所述光源模组包括基板、第一LED灯珠以及第二LED灯珠，所述第一LED灯珠以及所述第二LED灯珠均设置在所述基板上，所述第一LED灯珠呈环状排列组成第一灯环，所述第二LED灯珠也呈环状排列组成第二灯环，所述第二灯环围绕在所述第一灯环的外围；
    所述漫反射器的一端与所述第一灯环的中部相对，所述漫反射器的另一端向远离所述基板的方向延伸；
    所述控光元件包括第一遮挡部以及第二遮挡部，所述第一遮挡部以及所述第二遮挡部均呈环状且所述第二遮挡部围绕在所述第一遮挡部的外围，所述控光元件罩设在基板上，所述第一遮挡部与所述第一灯环相对，所述第二遮挡部与所述第二灯环相对；
    所述第一遮挡部约束所述第一LED灯珠所发出的光线的投射范围，所述第二遮挡部约束所述第二LED灯珠所发出的光线的投射范围。
  2. 根据权利要求1所述的草坪灯灯头，其中，在所述第一遮挡部的约束下所述第一LED灯珠所发出的光线仅能够并投射至所述漫反射器上。
  3. 根据权利要求1或2所述的光源模组，其中，所述第一遮挡部具有槽口、槽底、内槽壁以及外槽壁并形成有遮挡槽，所述槽口与所述槽底相对，所述内槽壁以及所述外槽壁分别由两侧连接所述槽口以及所述槽底，其中所述外槽壁围绕在所述内槽壁的外围，所述槽底上设置有通光孔，所述槽口背离所述基板，所述第一LED灯珠能够由所述通光孔露出，所述第一LED灯珠所发出的光线仅能够由所述槽口离开所述遮挡槽。
  4. 根据权利要求3所述的草坪灯灯头，其中，相对于所述内槽壁所述LED灯珠临近所述外槽壁，其中，所述遮挡槽的深度为10～20mm，所述遮挡槽为梯形槽。
  5. 根据权利要求1或2所述的草坪灯灯头，其中，所述第二遮挡部为遮挡板，所述遮挡板由所述第一遮挡部向外围延伸，并遮挡所述第二LED灯珠所发出的部分光线。
  6. 根据权利要求1或2所述的草坪灯灯头，其中，所述光源模组还包括驱动元件，所述驱动元件设置在所述基板上且位于所述第一灯环的内部，所述控光元件还包括容纳部，所述容纳部被所述第一遮挡部所环绕并与所述基板形成收容空间收容所述驱动元件。
  7. 根据权利要求8所述的草坪灯灯头，其中，所述控光元件一体成型。
  8. 根据权利要求1或2所述的草坪灯灯头，其中，所述第一遮光部和/或所述第二遮光部的表面为漫反射面。
  9. 根据权利要求1或2所述的草坪灯灯头，其中，所述漫反射器为圆柱形，或者，所述漫反射器为朝远离所述基板的方向渐阔的圆锥形或喇叭形。
  10. 一种草坪灯，其中，包括灯身以及权利要求1至11任一项所述的草坪灯灯头，所述草坪灯灯头设置在所述灯身上。
  11. 一种草坪灯灯头，其中，包括光源模组以及透明的导光罩；
    所述光源模组包括基板以及第一LED灯珠，所述第一LED灯珠设置在所述基板上，所述第一LED灯珠呈环状排列组成第一灯环；
    所述导光罩呈沿轴线延伸的筒状结构，所述导光罩的两端分别为入射端面以及远端面，所述入射端面垂直于所述轴线，同时所述导光罩还具有朝向所述轴线的内周面以及背离所述轴线的外周面，所述外周面沿所述轴线延伸，所述入射端面与所述第一灯环相对并使所述第一LED灯珠所发出的光线能够由所述入射端面射入所述导光罩内部；
    所述内周面上具有一段或多段反射面，所述反射面用于对光线进行全反射并减小反射至所述外周面的光线的入射角。
  12. 根据权利要求11所述的草坪灯灯头，其中，在过所述轴线的截面内，所述反射面由临近所述入射端面的一侧至临近所述远端面的一侧逐渐靠近所述外周面，其中，在过所述轴线的截面内，所述反射面为直线。
  13. 根据权利要求12所述的草坪灯灯头，其中，所述导光罩的临界角为α，所述反射面与所述轴线的夹角为x，则x满足：0°＜x≤(90°-2α)。
  14. 根据权利要求12所述的草坪灯灯头，其中，所述内周面上具有多段所述反射面，多段所述反射面沿所述轴线依次排布，相邻两个所述反射面之间由 一段连接面连接，一段所述反射面与一段所述连接面构成一个锯齿面。
  15. 根据权利要求14所述的草坪灯灯头，其中，在过所述轴线的截面内，所述连接面的长度小于所述反射面的长度。
  16. 根据权利要求12所述的草坪灯灯头，其中，在过所述轴线的截面内，所述反射面为曲线。
  17. 根据权利要求16所述的草坪灯灯头，其中，所述导光罩的临界角为α，所述反射面任意位置的切线与所述轴线的夹角为y，则y满足：0°＜y≤(90°-2α)。
  18. 根据权利要求12或16所述的草坪灯灯头，其中，所述内周面全部为所述反射面。
  19. 根据权利要求11至17任一项所述的草坪灯灯头，其中，所述光源模组还包括第二LED灯珠，所述第二LED灯珠设置在所述极板上且呈环状排列组成第二灯环，所述第二灯环被所述第一灯环所环绕；
    所述草坪灯灯头还包括漫反射器，所述漫反射器的一端与所述第二灯环的中部相对，所述漫反射器的另一端向远离所述基板的方向延伸。
  20. 一种草坪灯，其中，包括灯身以及权利要求11至19任一项所述的草坪灯灯头，所述草坪灯灯头设置在所述灯身上。
PCT/CN2019/115772 2018-11-05 2019-11-05 草坪灯灯头及草坪灯 WO2020094020A1 (zh)

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