Angle-adjusting assembly, LED lamp and angle-adjusting design method

Abstract

The application provides a kind of angle adjusting assembly for adjusting the relative position of lamp body and face ring in LED lamp, which comprises a first angle adjusting part and a second angle adjusting part connected by rotation, the first angle adjusting part is fixedly connected to the bottom of lamp body, and the first angle adjusting part is provided with a light shielding block; the second angle adjusting part is fixedly connected to the inner side of face ring, and the second angle adjusting part is provided with an arc-shaped notch; when the first angle adjusting part rotates relative to the second angle adjusting part, the light shielding block covers the arc-shaped notch. This kind of angle adjusting assembly has the functions of angle adjustment and light shielding, and when adjusting the relative position of lamp body and face ring in LED lamp, the light shielding block of the first angle adjusting part covers the arc-shaped notch of the second angle adjusting part, so that light does not overflow from the notch, and the light efficiency is improved. The application also provides a LED lamp with the angle adjusting assembly and an angle adjusting design method.

Description

Technical Field

[0001] This invention relates to the technical field of lighting devices with adjustable lighting angles, and in particular to an angle adjustment component, an LED luminaire, and an angle adjustment design method. Background Technology

[0002] Recessed lighting fixtures, such as ceiling lights, can achieve adjustable lighting angles by adding a rotating module. To accommodate the rotating lamp body, a notch is usually needed in the face ring to allow the tilted and rotating lamp body to move. However, this often results in gaps and light leakage.

[0003] In some recessed lighting fixtures, to prevent light leakage when the lamp body rotates, a light-leakage prevention module with a light-shielding plate is added. These light-shielding plates are flexible, curved plastic or metal parts. However, when the lamp body rotates, this type of light-shielding plate is slidably installed in the light-shielding plate's limiting groove via a clip. This means that when rotation is required, the light-shielding plate needs to deform to adapt to the lamp body's tilt. Over time, the light-shielding plate may experience difficulties in resetting / deforming, failing to provide effective light blocking.

[0004] In rotating mechanisms, most existing recessed lighting fixtures employ a combination of an upper and lower lamp body. For example, existing technology discloses an LED downlight comprising a light source, a rotating bracket, and a reflector holder. The reflector holder has rotating handles on opposite sides. Each opposite side of the rotating bracket has a latch and a rotating hole communicating with the latch. The rotating handles can enter through the latches and remain in the rotating holes, allowing the rotating bracket and the reflector holder to be hinged together. The LED downlight uses a sloped surface between at least one of the rotating bracket and the reflector holder to create a gap, enabling relative rotation through the hinge. However, this gap still presents a light leakage problem.

[0005] Therefore, optimizing the rotation and shielding structures of existing LED lamps is a technical problem that technicians in the field of angle-adjustable lighting technology need to solve. Summary of the Invention

[0006] To address the aforementioned problems in the prior art, this invention provides an angle adjustment component that simultaneously functions as angle adjustment and light shielding. When adjusting the relative position of the lamp body and the face ring in an LED lamp fixture, the light shielding block of the first angle adjustment component covers the arc-shaped notch of the second angle adjustment component, preventing light from escaping from the notch and improving luminous efficiency. This invention also provides a lamp fixture with this angle adjustment component and an angle adjustment design method.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] Angle adjustment component, used to adjust the relative position of the lamp body and the face ring in an LED lamp fixture.

[0009] The angle adjustment assembly includes a first angle adjustment component and a second angle adjustment component that are rotatably connected.

[0010] The first angle adjustment component is fixedly connected to the bottom of the lamp body, and the first angle adjustment component is provided with a light-shielding block;

[0011] The second adjusting member is fixedly connected to the inner side of the face ring, and the second adjusting member has an arc-shaped notch;

[0012] When the first adjusting member rotates relative to the second adjusting member, the light-shielding block covers the arc-shaped notch.

[0013] Furthermore, the first adjusting member includes a top plate and a rotating part disposed on the lower side of the top plate;

[0014] The second adjusting member includes a base and a rotating seat disposed on the upper side of the base. The rotating seat has a rotating groove inside, and the rotating part is located in the rotating groove and slides against the rotating seat.

[0015] The angle adjustment assembly allows for adjustment of the relative position of the lamp body and the face ring. Specifically, the first angle adjustment component is connected to the bottom of the lamp body, and the second angle adjustment component is connected to the inner side of the face ring. When the first angle adjustment component rotates relative to the second angle adjustment component, it also causes the lamp body to rotate relative to the face ring, thereby adjusting the illumination angle and achieving the effect of adjusting the light output direction. During the adjustment process, the light-shielding block on the first angle adjustment component covers the arc-shaped notch of the second angle adjustment component, preventing light from overflowing from the arc-shaped notch. This ensures that the light is emitted from the second angle adjustment component and the face ring simultaneously, providing both angle adjustment and light shielding, resulting in excellent light output performance.

[0016] Furthermore, the rotating part includes a first arc block and an annular body, and a gap is provided between the first arc block and the annular body;

[0017] The annular body is provided with a second arc block, which is located on the annular body arc surface away from the first arc block.

[0018] The gap between the first arc block and the ring-shaped body provides space for the first arc block to undergo elastic deformation. The second arc block is used to fit with the arc-shaped notch, thereby blocking and covering the arc-shaped notch to prevent light from leaking out.

[0019] Furthermore, the annular body is also provided with a first inclined surface and a second inclined surface. The first inclined surface is formed from the outside to the inside at an angle downwards, and the first inclined surface is close to the first arc block. The second inclined surface is formed from the inside to the outside at an angle downwards, and the second inclined surface is close to the second arc block. The bottom ends of the first inclined surface and the second inclined surface terminate at a boss provided at the bottom of the annular body.

[0020] In the first adjusting component, the first inclined surface and the second inclined surface of the annular body cooperate with the first arc block and the second arc block respectively, so that the first arc block and the second arc block can smoothly deform in the rotating groove and slide along the side wall of the rotating groove.

[0021] Furthermore, the first inclined plane and the normal to the plane containing the protrusion form an angle θ1, and the maximum rotation angle of the ceiling light is θ2. The relationship between θ1 and θ2 is as follows:

[0022]

[0023] Wherein, D is the inner diameter of the opening at the top of the annular body.

[0024] After optimization, the included angle θ1 is calculated from the maximum rotation angle θ2 and the inner diameter D of the top opening, ensuring that the included angle of the inclined plane can provide excellent rotation effect for the first arc block.

[0025] Furthermore, the annular body is also provided with ribs, the two ends of which are respectively connected to the first arc block and the annular body. The annular body is provided with ribs connecting the first arc block and the annular body, which can ensure the structural strength of the first arc block.

[0026] Furthermore, the light-shielding block is formed by the top plate extending horizontally towards the second arc-shaped block. The centerline of the top plate does not coincide with the centerline of the rotating part, so that when the rotating part rotates relative to the rotating seat, the light-shielding block extending from the top plate can effectively cover the arc-shaped gap.

[0027] Furthermore, the rotating seat includes a first arc-shaped piece and a second arc-shaped piece connected together, the rotating groove is formed by the first arc-shaped piece and the second arc-shaped piece together, and the arc-shaped notch is formed in the second arc-shaped piece;

[0028] The inner wall of the first arc-shaped piece is fixedly connected to the inner wall of the second arc-shaped piece.

[0029] The inner wall of the first arc-shaped piece is connected to the first arc block, and the inner wall of the second arc-shaped piece is connected to the second arc block.

[0030] The present invention also provides an LED lamp, including a lamp body, a face ring, a light source assembly, a lens and a reflector, as well as the aforementioned angle adjustment assembly. The lamp body has an internal mounting cavity, in which the light source assembly and the lens are mounted. The face ring has an internal face ring cavity, in which the reflector is mounted.

[0031] The lamp body rotates relative to the face ring via the first and second angle adjustment components.

[0032] This invention also provides an angle adjustment design method, which involves designing the parameters related to the adjusted rotation angle in the aforementioned LED lighting fixture, specifically including the following steps:

[0033] 101. Determine the maximum rotation angle θ2 of the LED lamp and the height Lp of the lens;

[0034] 102. Determine that the inner diameter of the opening at the top of the ring and the inner diameter of the light exit aperture of the lens are both D;

[0035] θ2, Lp, and D are all known values;

[0036] 103. Since the annular body and the lens are set on different axes, the central axis of the lens divides the inner diameter of the opening at the top of the annular body into S1 and S2. Since D=S1+S2, we can get S1=D-S2.

[0037] 104. The height of the lens when it is located on the first adjusting piece is L2, and the height when it is not located on the first adjusting piece is L1. Since Lp = L1 + L2, we can get L1 = Lp - L2.

[0038] 105. According to the laws of sine and cosine, we have:

[0039] sinθ2=L2 / 0.5D, L2=0.5D* sinθ2; ①

[0040] cosθ2=S2 / 0.5D, S2=0.5D* cosθ2; ②

[0041] Since S1 = D - S2 and L1 = Lp - L2;

[0042] The calculation yields: S1 = D - 0.5D * cosθ²; ③

[0043] L1 = Lp - 0.5D * sinθ2; ④

[0044] 106. According to the tangent law, and the above ①②③④, we have:

[0045] tanθ1=(S1-0.5D) / L2=(D-0.5D* cosθ2) / 0.5D* sinθ2.

[0046] The calculated included angle θ1 is:

[0047] θ1=arctan(D-0.5cosθ2) / (0.5D*sinθ2);

[0048] θ1 is the angle between the first inclined plane and the normal to the plane containing the boss.

[0049] Based on the above technical solution, the technical effects achieved by the present invention are as follows:

[0050] (1) In the angle adjustment component provided by the present invention, when the first angle adjustment component rotates relative to the second angle adjustment component, it also drives the lamp body to rotate relative to the face ring, thereby adjusting the illumination angle and achieving the effect of adjusting the light output direction. During the adjustment process, the light-shielding block set on the first angle adjustment component will cover the arc-shaped notch of the second angle adjustment component, so that the light will not overflow from the arc-shaped notch, ensuring that the light is emitted from the second angle adjustment component and the face ring, which can combine angle adjustment and light shielding, and has good light output efficiency.

[0051] (2) The LED lamp and the corresponding angle adjustment design method provided by the present invention have an angle θ1 between the first inclined surface of the ring body and the normal of the plane where the boss is located. The angle is calculated by the maximum rotation angle θ2 and the inner diameter D of the top opening. Through this optimization design, it is ensured that the angle of the inclined surface can provide excellent rotation effect for the first arc block. Attached Figure Description

[0052] Figure 1 This is an exploded view of the angle adjustment component of the present invention.

[0053] Figure 2 This is a schematic diagram of the angle adjustment component, lamp body, and face ring of the present invention.

[0054] Figure 3 This is a cross-sectional view of the angle adjustment component of the present invention when it is assembled into an LED lamp.

[0055] Figure 4 This is an exploded view of the LED lamp of the present invention.

[0056] Figure 5 This is a cross-sectional view of the LED lamp of the present invention when it rotates.

[0057] Figure 6 This is a cross-sectional view of an LED lamp corresponding to the angle adjustment design method of the present invention.

[0058] Figure 7 This is a schematic diagram of the angle adjustment design method of the present invention. Detailed Implementation

[0059] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0060] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0061] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0063] Example 1

[0064] Figure 1 This is an exploded view of the angle adjustment component in this embodiment. Figure 2 This is a schematic diagram of the angle adjustment component, lamp body, and face ring in this embodiment. Figure 3 This is a cross-sectional view of the angle adjustment component of this embodiment assembled into an LED lamp, in conjunction with reference to the reference. Figures 1-3 An angle adjustment component 2 is used to adjust the relative position of the lamp body 1 and the face ring 3 of the LED lamp. That is, the lamp body 1 can be rotated relative to the face ring 3 through the angle adjustment component 2, so that the light can be projected according to the user's needs.

[0065] The angle adjustment assembly 2 includes a first angle adjustment component 21 located at the top and a second angle adjustment component 22 located at the bottom. The first angle adjustment component 21 is fixedly connected to the bottom of the lamp body 1, and the second angle adjustment component 22 is fixedly connected to the inner side of the face ring 3. In the connection structure between the second angle adjustment component 22 and the face ring 3, the second angle adjustment component 22 and the face ring 3 can be fixed together by fasteners 7, such as screws.

[0066] The first adjusting member 21 can rotate relative to the second adjusting member 22, so that the lamp body 1 can also rotate relative to the face ring 3.

[0067] In addition, the first adjusting member 21 is provided with a light-shielding block 210, and the second adjusting member 22 is provided with an arc-shaped notch 220. After the rotation is completed, the light-shielding block 210 covers the arc-shaped notch 220 to prevent light from leaking out from the arc-shaped notch 220.

[0068] It should be noted that the first adjusting member 21 includes a top plate 211 and a rotating part 212. The rotating part 212 is a spherical structure with an opening, located on the lower side of the top plate 211. In this embodiment, the rotating part 212 and the top plate 211 are integrally formed.

[0069] The second adjusting member 22 includes a base 221 and a rotating seat 222. The rotating seat 222 is an annular structure with an arc-shaped notch 220, located on the upper side of the base 221. The base 221 also has an annular structure. A rotating groove 223 is provided inside the rotating seat 222. After the ceiling light is assembled, the rotating part 212 of the first adjusting member 21 is located in the rotating groove 223 and slides against the rotating seat 222. Specifically, the outer wall of the rotating part 212 slides against the inner wall of the rotating seat 222.

[0070] The rotating part 212 further includes a first arc block 2121 and an annular body 2122. In this embodiment, the first arc block 2121 and the annular body 2122 are separately arranged, that is, a gap 2123 is provided between the first arc block 2121 and the annular body 2122. Since the outer sidewall of the first arc block 2121 slides against the inner sidewall of the rotating seat 222, the gap 2123 can provide deformation space for the elastic deformation when the first arc block 2121 undergoes elastic deformation.

[0071] The annular body 2122 is provided with a second arc block 2124 on the arc surface away from the first arc block 2121. The outer side wall of the second arc block 2124 is inserted into the rotating groove 223 through the arc notch 220, and the outer side wall of the second arc block 2124 also slides against the inner side wall of the rotating seat 222.

[0072] It should be noted that the annular body 2122 in this embodiment is also provided with a first inclined surface 2125 and a second inclined surface 2126, such as... Figure 3As shown, the first inclined surface 2125 is formed by the outer side of the annular body 2122 tapering inwards towards the inner side, and the second inclined surface 2126 is formed by the inner side extending downwards towards the outer side. The second inclined surface 2126 is close to the second arc block 2124, and the first inclined surface 2125 is close to the first arc block 2121. The bottom ends of the first inclined surface 2125 and the second inclined surface 2126 terminate at the boss 2127 provided at the bottom of the annular body 2122. The boss 2127 is used to place the lens 5.

[0073] In this embodiment, the normals of the plane containing the first inclined surface 2125 and the boss 2127 form an angle θ1, wherein θ1 and the maximum rotation angle θ2 of the ceiling light have the following relationship:

[0074] θ1=arctan(D-0.5cosθ2) / (0.5D*sinθ2), where D is the inner diameter of the opening at the top of the annular body 2122.

[0075] In this embodiment, the angle adjustment component is assembled into an LED lamp, and the rotation angle of the LED lamp is set to 40°. Compared with the maximum rotation angle of 30° of existing recessed lamps, this increases the adjustment range. The relationship will be explained in subsequent embodiments of this document.

[0076] Back Figure 1 The annular body 2122 is also provided with a rib 2128. One end of the rib 2128 is connected to the first arc block 2121, and the other end is connected to the bottom of the annular body 2122, which can ensure the structural strength of the first arc block 2121 and even the rotating part 212.

[0077] It should also be noted that the light-shielding block 210, which covers and blocks the arc-shaped notch 220 during rotation, is formed by the top plate 211 extending horizontally towards the second arc block 2124. It is understood that the centerline of the top plate 211 does not coincide with the centerline of the rotating part 212. When the rotating part 212 of the first adjusting member 21 rotates relative to the rotating seat 222 of the second adjusting member 22, the light-shielding block 210 extending from the top plate 211 can effectively cover the arc-shaped notch 220.

[0078] More specifically, the rotating seat 222 includes a first arc-shaped piece 2221 and a second arc-shaped piece 2222, which are connected together to form a rotating groove 223. During the connection process, the inner wall of the first arc-shaped piece 2221 is fixedly connected to the inner wall of the second arc-shaped piece 2222, and the arc-shaped notch 220 is provided in the second arc-shaped piece 2222. In this way, the outer wall of the first arc block 2121 slides against the inner wall of the first arc-shaped piece 2221, and the outer wall of the second arc block 2124 slides against the inner wall of the second arc-shaped piece 2222.

[0079] In the angle adjustment component 2 provided in this embodiment, when the first angle adjustment component 21 rotates relative to the second angle adjustment component 22, it also drives the lamp body 1 to rotate relative to the face ring 3, thereby adjusting the lighting angle and achieving the effect of adjusting the light output direction. During the adjustment process, the light-shielding block 210 provided on the first angle adjustment component 21 covers the arc-shaped notch 220 of the second angle adjustment component 22, so that the light will not overflow from the arc-shaped notch, ensuring that the light is emitted from the second angle adjustment component and the face ring, which can combine angle adjustment and light shielding, and has good light output efficiency. In addition, when the angle adjustment component of this embodiment is assembled into an LED lamp, the maximum rotation angle of the lamp can be increased to 40°, effectively increasing the lighting range.

[0080] Example 2

[0081] Figure 4 This is an exploded view of the LED lighting fixture in this embodiment. Figure 5 This is a cross-sectional view of the LED lamp in this embodiment when it rotates. Figures 1-3 Based on reference Figure 4 and Figure 5 An LED light fixture 100 can be embedded in a ceiling or suspended ceiling and has the functions of angle adjustment and shading.

[0082] The LED lamp 100 includes a lamp body 1, an adjustment assembly 2, a face ring 3, a light source assembly 4, a lens 5, and a reflector 6. The lamp body 1 has a mounting cavity 10, within which the light source assembly 4 and the lens 5 are mounted. The light source assembly 4 includes a light emitter 41 and a substrate 42. In this embodiment, the light emitter 41 is a COB light source, which is attached to the substrate 42 and covered by the lens 5. Thus, the light emitted by the light emitter 41 is processed by the lens 5 before being emitted. A power supply assembly is also provided in the mounting cavity 10, and a heat sink is located on the outside of the lamp body. The face ring 3 is the final light-emitting part, containing a face ring cavity 30, within which the reflector 6 is mounted. Furthermore, the second adjustment component 22 is fixedly connected to the face ring 3 by fasteners 7.

[0083] The light emitted by the light source 41 passes through the lens 5, the adjustment cavity inside the angle adjustment assembly 2, and is then reflected by the reflector cup 6 before being projected onto the desired lighting position.

[0084] It should be noted that in this embodiment, the lamp body 1 rotates relative to the face ring 3 via the angle adjustment component 2, thereby allowing for angle adjustment so that the light can be projected according to the user's needs. Figure 5As shown, during rotation, the first adjusting member 21 of the adjusting assembly rotates relative to the second adjusting member 22. When the maximum rotation angle is reached, the outer wall of the first arc block 2121 of the first adjusting member 21 abuts against the top of the inner wall of the first arc-shaped piece 2221 of the second adjusting member 22. The annular body 2122 is inserted into the internal cavity of the reflector cup 6 near the bottom of the second arc block 2124, at which time the outer wall of the second arc block 2124 abuts against the inner wall of the second arc-shaped piece 2222. The light-shielding block 210 covers the arc-shaped notch, and the edge of the light-shielding block 210 abuts against the top of the second arc-shaped piece 2222.

[0085] The LED luminaire of this embodiment can ensure no light leakage and improve lighting efficiency when the range of illumination angle adjustment is increased.

[0086] Example 3

[0087] Figure 6 This is a cross-sectional view of the LED lamp corresponding to the angle adjustment design method in this embodiment. Figure 7 A schematic diagram of the angle adjustment design method, for reference. Figure 6 and Figure 7 In the first adjusting member 21, the first inclined surface 2125 of the annular body forms an angle θ1 with the normal y of the plane containing the boss 2127, and the first inclined surface 2125 and the boss 2127 intersect at point f. The included angle θ1 is also ∠efg. The following is the calculation process of the included angle θ1 and other corresponding parameters. (Since the height of the boss 2127 is small, the height value of the boss is ignored in this calculation process.)

[0088] An angle adjustment design method for designing parameters related to the adjusted rotation angle specifically includes the following steps:

[0089] 101. Determine the maximum rotation angle θ2 of the LED lamp and the height Lp of the lens;

[0090] In this embodiment, the included angle θ2 is ∠bac. Here, the included angle θ2 is the maximum rotation angle of the LED lamp design, such as the known 40°.

[0091] 102. Determine that the inner diameter of the opening at the top of the ring and the inner diameter of the light exit hole of the lens are both D, with a radius of 0.5D;

[0092] In this embodiment, θ2, Lp, and D are all known values;

[0093] 103. Since the annular body and the lens are set on different axes, the central axis m of the lens divides the inner diameter of the opening at the top of the annular body into S1 and S2. Since D=S1+S2, we can get S1=D-S2.

[0094] 104. The height of the lens when it is located on the first adjusting piece is L2, and the height when it is not located on the first adjusting piece is L1. Since Lp = L1 + L2, we can get L1 = Lp - L2.

[0095] 105. According to the laws of sine and cosine, we have:

[0096] sinθ2=L2 / 0.5D, L2=0.5D* sinθ2; ①

[0097] cosθ2=S2 / 0.5D, S2=0.5D* cosθ2; ②

[0098] Since S1 = D - S2 and L1 = Lp - L2;

[0099] The calculation yields: S1 = D - 0.5D * cosθ²; ③

[0100] L1 = Lp - 0.5D * sinθ2; ④

[0101] 106. According to the tangent law, and the above ①②③④, we have:

[0102] tanθ1=(S1-0.5D) / L2=(D-0.5D* cosθ2) / 0.5D* sinθ2.

[0103] The calculated included angle θ1 is:

[0104] θ1=arctan(D-0.5cosθ2) / (0.5D*sinθ2);

[0105] In addition, the lens is located at the height L2 of the first adjustment element, which is 0.5D * sinθ2.

[0106] The above description is merely an example and illustration of the structure of this invention, and while the description is specific and detailed, it should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these obvious substitutions all fall within the protection scope of this invention.

Claims

1. An angle adjusting assembly for adjusting the relative position of a lamp body and a face ring in an LED lamp, characterized in that the angle adjusting assembly comprises a first angle adjusting member and a second angle adjusting member connected in rotation, the first angle adjusting member is fixedly connected to the bottom of the lamp body, and the first angle adjusting member is provided with a light shielding block; the second angle adjusting member is fixedly connected to the inner side of the face ring, and the second angle adjusting member is provided with an arc-shaped gap; when the first angle adjusting member is rotated relative to the second angle adjusting member, the light shielding block covers the arc-shaped gap; the first angle adjusting member comprises a top plate and a rotating part arranged on the lower side of the top plate; the second angle adjusting member comprises a base and a rotating seat arranged on the upper side of the base, the rotating seat is internally provided with a rotating groove, and the rotating part is located in the rotating groove and in sliding abutment with the rotating seat; the rotating part comprises a first circular arc block and an annular body arranged in a split manner, and a gap is arranged between the first circular arc block and the annular body; the annular body is provided with a second circular arc block, and the second circular arc block is located on the annular surface of the annular body away from the first circular arc block; the center line of the top plate does not coincide with the center line of the rotating part, and the light shielding block is formed by the horizontal extension of the top plate towards the second circular arc block; the annular body is further provided with a first inclined surface and a second inclined surface, the first inclined surface is formed obliquely downward from the outer side to the inner side, the first inclined surface is close to the first circular arc block, the second inclined surface is formed obliquely downward from the inner side to the outer side, and the second inclined surface is close to the second circular arc block. the bottom ends of the first inclined surface and the second inclined surface terminate at the boss arranged on the bottom of the annular body.

2. The corner assembly of claim 1, wherein the normal of the plane where the first inclined surface and the boss are located has an included angle θ1, the maximum rotation angle of the LED lamp is θ2, and the θ1 and the θ2 have the following relationship:

3. The corner assembly of claim 2, wherein, wherein D is the inner diameter of the opening at the top of the annular body. the annular body is further provided with a rib, and the two ends of the rib are connected to the first circular arc block and the annular body, respectively.

4. The corner assembly of claim 3, wherein, the rotating seat comprises a first arc-shaped sheet and a second arc-shaped sheet connected together, the rotating groove is formed by the first arc-shaped sheet and the second arc-shaped sheet together, and the arc-shaped gap is formed in the second arc-shaped sheet; 5. The corner assembly of claim 4, wherein, the inner side wall of the first arc-shaped sheet is fixedly connected to the inner side wall of the second arc-shaped sheet. an LED lamp comprising a lamp body, a face ring, a light source assembly, a lens and a reflector cup, and the angle adjusting assembly of claim 5, the lamp body forms an installation cavity inside, the light source assembly and the lens are installed in the installation cavity; the face ring forms a face ring cavity inside, and the reflector cup is installed in the face ring cavity; 6. LED lamp, characterized in that the lamp body is rotated relative to the face ring through the first angle adjusting member and the second angle adjusting member. In the LED lamp of claim 6, the parameters related to the adjusted rotation angle are designed, specifically including the following steps:

7. A method of designing an angle, characterized in that Step 101. Determine the maximum rotation angle θ2 of the LED lamp and the height Lp of the lens; Step 102. Determine the inner diameter of the opening at the top of the annular body and the inner diameter of the light emitting hole of the lens, both of which are D; θ2, Lp and D are known values; ​ Step 103. Since the annular body and the lens are arranged in different axes, the central axis of the lens divides the inner diameter of the annular body top opening into S1 and S2, and D=S1+S2, S1=D-S2 can be obtained; Step 104. The lens is located at the height of the first angle adjusting part L2, and the height of the lens not located in the first angle adjusting part is L1, Lp=L1+L2, L1=Lp-L2 can be obtained; Step 105. According to the sine law and the cosine law, there are: sinθ2=L2 / 0.5D, L2=0.5D*sinθ2; ① cosθ2=S2 / 0.5D, S2=0.5D*cosθ2; ② And since S1=D-S2, L1=Lp-L2; S1=D-0.5D*cosθ2; ③ L1=Lp-0.5D*sinθ2; ④ Step 106. According to the tangent law, and the above ①②③④, there are: tanθ1=(S1-0.5D) / L2=(D-0.5D*cosθ2) / 0.5D*sinθ2; The included angle θ1 is: θ1=arctan(D-0.5cosθ2) / (0.5D*sinθ2); θ1 is the included angle between the first inclined surface and the normal of the plane where the boss is located.

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