Lamp

Abstract

Provided in the present application is a lamp, comprising a lamp body, a light source and a reflector, wherein the lamp body comprises a bottom surface and a side wall extending upwards around the bottom surface; and one end of the side wall that faces away from the bottom surface is a light outlet, the light source is arranged on the bottom surface of the lamp body and emits light towards the light outlet, a smaller end of the reflector is close to the light source, and a larger end of the reflector is connected to an end edge of the side wall to form the light outlet. The lamp further comprises a light-shielding wall. One cylindrical end of the light-shielding wall is connected to a mounting surface of the light source and surrounds the light source, and the other end of the light-shielding wall is connected to an outer side surface of the reflector. An annular cavity is formed between the light-shielding wall and the side wall, the bottom surface is provided with a first through hole leading to the outer side of the lamp body, the first through hole being located between the light-shielding wall and the side wall, and the side wall is provided with a second through hole leading to the outer side of the lamp body. The first through hole and the second through hole form a convection channel in communication with the annular cavity.

Description

Lamp

[0001] Cross-reference to related applications

[0002] This application claims priority to the Chinese patent application No. 202420919805.5, filed on April 29, 2024, and entitled “Lamp”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of lighting, in particular to a lamp. BACKGROUND

[0004] LED lighting has the characteristics of low energy consumption, green environmental protection, long service life, etc., and is the mainstream product in the current lighting field. At present, LED spotlights are widely used in general indoor lighting scenes, such as homes, shopping malls, hotels, etc. High-power spotlights are more suitable for local close-up lighting of handicrafts, jewelry, antiques, artistic photos and patterns, product display, boutique display windows, etc. due to their higher brightness. During use, the high-power LED light source generates heat, which can easily cause the temperature of the entire high-power LED spotlight to continuously rise, and can easily damage the high-power LED light, affecting the use of the high-power LED light source and reducing the service life of the high-power LED spotlight. In order to solve the problem of overheating of the lamp body, heat dissipation fins can be installed on the lamp body. However, the heat dissipation fins are sufficient for the heat dissipation of small-power spotlights, but for the heat dissipation of high-power spotlights, relying on heat dissipation fins alone is not enough. SUMMARY

[0005] To achieve the above functions, the present application provides a lamp, which comprises a lamp body and a light source. The lamp body comprises a bottom surface and a side wall extending upwards around the bottom surface. The end of the side wall away from the bottom surface is an light outlet. The light source is arranged on the bottom surface of the lamp body and emits light towards the light outlet. The lamp further comprises a reflector. The reflector comprises two ports of different sizes. The small end port of the reflector is close to the light source. The large end port of the reflector is connected to the end of the side wall to form the light outlet. The lamp further comprises a light-shielding wall. The light-shielding wall is in the shape of a cylinder and is connected to the mounting surface of the light source and surrounds the light source at one end. The other end of the light-shielding wall is connected to the outer side surface of the reflector. An annular cavity is formed between the light-shielding wall and the side wall. A first through hole is formed in the bottom surface and leads to the outside of the lamp body. The first through hole is located between the light-shielding wall and the side wall. A second through hole is formed in the side wall and leads to the outside of the lamp body. The first through hole and the second through hole form a convection channel that passes through the annular cavity. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 is a structural schematic diagram of a lamp according to an embodiment of the present application;

[0007] Figure 2 is a cross-sectional view of a lamp according to an embodiment of the present application;

[0008] Figure 3 is a structural schematic diagram of a lower cover of a lamp body according to an embodiment of the present application;

[0009] Figure 4 is a structural schematic diagram of an upper cover of a lamp body according to an embodiment of the present application;

[0010] Figure 5 is a structural schematic diagram of a light source mounting portion according to an embodiment of the present application;

[0011] Figure 6 is a schematic diagram of air flow in a heat dissipation channel according to an embodiment of the present application. DETAILED DESCRIPTION

[0012] The lamp according to the present application will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] Figure 1 is a structural schematic diagram of an embodiment of the present application, and Figure 2 is a cross-sectional view of the embodiment. The embodiment is a high-power spotlight, as shown in the figures, the lamp includes a light source 3, a lamp body 1, and a face ring 2.

[0014] The face ring 2 is provided with a spring assembly 7 for fixing the lamp on a mounting surface. The spotlight is generally mounted on a mounting surface such as a ceiling or a suspended ceiling. When mounting, a hole is first made in the mounting surface, the lamp body 1 is inserted through the hole, and the spring assembly 7 and the face ring 3 are arranged on both sides of the mounting surface and sandwich the mounting surface to achieve mounting of the lamp.

[0015] The lamp body 1 includes a bottom surface 1011 and a sidewall extending upward around the bottom surface 1011. In the embodiment, the lamp body includes an upper cover 102 and a lower cover 101, and thus the sidewall can also be divided into a second connecting wall 1024 arranged on the upper cover 102 and a first connecting wall 1014 arranged on the lower cover 101. An end of the sidewall away from the bottom surface 1011 is an light exit opening 1023. In the embodiment, the light exit opening 1023 is arranged at an end of the upper cover 102 away from the lower cover 101. In other embodiments, the lamp body can also be designed in one piece, which is not limited by the present application. The light source 3 is arranged on the bottom surface 1011 of the lamp body 1 and faces the light exit opening 1023 for emitting light. The lamp body 1 is further provided with a pivot shaft 1021 on the outside, and the lamp body 1 is pivotally connected to the face ring 2 through the pivot shaft 1021. The pivot shaft 1021 is perpendicular to the light exit direction of the light source 3, and the lamp body 1 can be adjusted in angle along the axis of the pivot shaft 1021, thereby achieving adjustment of the light exit angle of the spotlight.

[0016] The LED light source is the main heat source of the lamp, and the light source 3 is arranged on the inner side of the bottom surface 1011 of the lamp body 1. In order to achieve heat dissipation, the side of the bottom surface 1011 away from the light source 3 is provided with heat dissipation fins 1013. For ordinary spotlights, heat dissipation through the heat dissipation fins 1013 can meet the heat dissipation demand, but for high-power spotlights, the temperature inside the lamp body is higher, and heat dissipation through the heat dissipation fins 1013 is slightly difficult. Moreover, the arrangement of the light source 3 also has a certain influence on heat dissipation. In some embodiments, the light source plate is directly attached to the bottom surface 1011, and heat is directly conducted to the heat dissipation fins 1013 through the bottom surface 1011. This scheme has good heat dissipation effect, but the contact between the light source 3 and the metal lamp body does not meet the insulation isolation requirement of the lamp. In order to meet the safety specification and achieve insulation isolation, one scheme is to use a non-metal shell, and another scheme is to arrange a light source mounting portion 4 between the light source 3 and the bottom surface 1011, the light source mounting portion 4 is first mounted on the bottom surface 1011, and the light source 3 is arranged on the light source mounting portion 4. In this embodiment, a COB light source is used, and the light source mounting portion 4 is a light source support as shown in FIG. 5. Whether a non-metal shell is used or the light source mounting portion 4 is arranged, the heat dissipation efficiency of the lamp is reduced, and the temperature inside the lamp body 1 is too high. To solve this problem, a first through hole 1012 is opened on the bottom surface 1011 to the outside of the lamp body 1, and a second through hole 1022 is opened on the side wall to the outside of the lamp body 1, forming a convection channel flowing from the side of the lamp body 1 to the bottom surface 1011. The convection channel brings the heat on the inner side of the lamp body 1 out from the bottom surface 1011, and the first through hole 1012 is arranged between the two heat dissipation fins 1013, which can better achieve heat dissipation.

[0017] The lamp of the embodiment comprises a two-stage light distribution system, and a light distribution portion 8 is arranged on the light source 3 to realize one-stage light distribution, and the light emitted by the light source 3 is first emitted after passing through the light distribution portion 8 and then passes through the reflector 6 to realize two-stage light distribution. The small end port of the reflector 6 is connected to the light emitting surface of the light distribution portion 8 close to the light source 3, and the outer side end of the second connecting wall 1024 of the upper cover 102 connected to the large end port of the reflector 6 forms the light emitting port 1023 of the lamp body 1. In this embodiment, the light distribution portion 8 comprises a lens support 801 and a lens 802, and in other embodiments, the light distribution portion 8 can also select a lens reflector, a light guide and other optical elements, which are not limited in the present application.

[0018] As mentioned above, the side wall of the lamp body 1 is opened for heat dissipation, and the opening on the side wall will cause light leakage. The embodiment lamp is an angle-adjustable spotlight, and the lamp body 1 and the support of the face ring 2 are pivotally connected through the pivot shaft 1021, so the lamp body 1 can rotate relative to the face ring 2, and thus there is a gap between the lamp body 1 and the face ring 2. The light leaked from the second through hole 1022 of the side wall of the lamp body 1 can be observed by the user through the gap. Since the surface of the reflector 6 is provided with a reflective layer, the light reaching the position of the reflector 6 is reflected and then emitted from the light outlet 1023, and the light will not leak from the side. The light leakage mainly occurs at the part of the lens 802. Even if a total internal reflection lens or a lens reflector is used as a light distribution part to reflect most of the light to the light outlet, the side of the lens 802 will still be bright, so that a bright lens profile can be seen from the outside. In order to avoid this phenomenon, the lamp of the embodiment further comprises a light shielding wall 5, which is in the shape of a cylinder, one end of which is connected to the mounting surface of the light source 3 and surrounds the light source 3, and the other end is connected to the outer side surface of the reflector 6. The light shielding wall 5 and the side wall of the lamp body 1 are coaxially arranged, so that an annular cavity is formed between them, and the first through hole 1012 is located between the light shielding wall 5 and the side wall. The first through hole 1012 and the second through hole 1022 form a convection channel through the annular cavity, as shown in FIG. 6. The narrow and vertical convection channel between the light shielding wall 5 and the side wall is conducive to the formation of a chimney effect, making the air draft effect more obvious, thereby increasing the air flow rate. Such a design not only plays a role in carrying heat out of the lamp body 1, but also avoids light leakage of the lamp body. The light shielding wall 5 is arranged on the outer side surface of the reflector 6, which reasonably utilizes the internal space of the lamp, and does not increase the width of the lamp body 1 due to the arrangement of the convection channel, so that the lamp body is more compact. In other embodiments, the light distribution part 8 can not be included, and the light shielding wall 5 forms an optical cavity between the small end port of the reflector 6 and the light source 3. The light emitted by the light source 3 passes through the optical cavity and then enters the reflector 6.

[0019] In order to better achieve the effect of preventing light leakage, as shown in FIG. 5, the light source mounting part 4 includes a mounting substrate 401, and the mounting substrate 401 is provided with a light source mounting groove 403. A light leakage prevention groove 402 is further arranged around the light source mounting groove 403. The end of the light shielding wall 5 close to the light source is inserted into the light leakage prevention groove 402 to prevent bottom light leakage. Of course, in other embodiments, if the light source support of FIG. 5 is not included, and the bottom surface 1011 is directly used as the light source mounting part 4, a groove surrounding the light source 3 can be directly arranged on the bottom surface 1011 as the light leakage prevention groove 403.

[0020] The structure of the lower cover 101 in this embodiment is shown in FIG. 3. The lower cover 101 comprises a bottom surface 1011 and a first connecting wall 1014 surrounding the bottom surface and extending upward. Two arc-shaped first through holes 1012 are formed in the bottom surface 1011. As shown in FIG. 1, the heat dissipation fins 1013 in this embodiment are also arc-shaped. The first through holes 1012 are arranged between the two outermost heat dissipation fins 1013. In other embodiments, the heat dissipation fins 1013 can be divergent, and the first through holes 1012 can be equidistantly distributed along the circumference between two heat dissipation fins 1013. The form of the first through holes 1012 can be flexibly set according to the layout of the heat dissipation fins 1013 of the lamp.

[0021] The structure of the upper cover 102 is shown in FIG. 4. The upper cover 102 includes a second connecting wall 1024. In this embodiment, the second through hole 1023 is arranged on the second connecting wall 1024. Arranging the second through hole close to the light outlet 1023 can increase the length of the convection passage and remove more heat. In other embodiments, the second through hole 1023 can also be arranged on the first connecting side wall 1014 of the lower cover 101, or both the first connecting wall 1014 and the second connecting wall 1024. The second connecting wall 1024 also has a buckle 1025 arranged thereon, and the first connecting wall 1014 has a buckle groove arranged thereon to cooperate with the buckle 1025. The first connecting wall 1014 and the second connecting wall 1024 are buckled to form the side wall of the lamp body 1. In other embodiments, the first connecting wall 1014 and the second connecting wall 1024 can also be connected by screw threads, connectors, or other methods, which are not limited by the present application. In this embodiment, the second side wall 1024, the reflector 6, and the light shielding wall 5 are integrally formed to constitute the upper cover 102. The second connecting wall 1024 is connected to the large end of the reflector 6, and the light shielding wall 5 is fixedly arranged on the outer side of the reflector 6. There is a spacing distance between the connecting portion of the light shielding wall 5 and the small end port of the reflector 6. Because of the spacing distance between the connecting portion of the light shielding wall 5 and the small end port of the reflector 6, the diameter of the light shielding wall 5 is greater than the diameter of the small end port of the reflector 6. In this embodiment, the size of the light distribution part 8 is designed according to the thickness of the light shielding wall 5, that is, the maximum diameter of the light distribution part 8 is also greater than the diameter of the small end port of the reflector 6. Therefore, the port plays an axial limiting role, and the light distribution part 8 cannot be removed without additional positioning structure. In this embodiment, the light distribution part includes a lens support 801 and a lens 802, and the lens 802 is positioned and installed by the lens support. When designing, the lens support 801 cooperates with the light shielding wall 5, the diameter of the lens support 801 is close to the diameter of the light shielding wall 5, and the light shielding wall 5 limits the lens support in the circumferential direction. The height of the lens support 801 is just enough to allow the lens support 802 to be clamped by the small end port of the reflector 6 and the light source mounting portion 4 after installation. In order to facilitate positioning, the light source mounting portion 4 is provided with a positioning hole, and the lens support is provided with a positioning column. When installing, the light source 3 is first installed on the bottom surface 1011 of the lamp body through the light source mounting portion 4. After the lens 802 and the lens support 801 are combined, the positioning column of the lens support 801 is inserted into the positioning hole. When the upper cover 102 and the lower cover 101 are buckled, the light distribution part 8 enters the optical cavity surrounded by the light shielding wall 5, the light shielding wall 5 is inserted into the light leakage prevention groove 402, the small end port of the reflector 6 axially fixes the light distribution part 8, and the light shielding wall 5 limits the light distribution part 8 in the circumferential direction. By this operation, the lamp body can be assembled and the internal devices can be fixed in one step, which is easy to assemble.

[0022] In other embodiments, the reflector 6 and the light shielding wall 5 can also be arranged as an integral part. After the light shielding wall 5 and the reflector 6 are fixed to the internal light control components, the reflector 6 is fixed to the side wall port of the lamp body 1, which is not limited by the present application.

[0023] The lamp provided by the application has the advantages that the heat dissipation lamp body is provided with an opening at the heat dissipation fin, and an air convection passage is formed by the opening at the side surface, so that air convection is increased, and the temperature of the lamp body is reduced. The light shielding wall wraps the optical system therein, and the light shielding wall has the effect of preventing light leakage. Meanwhile, the light shielding wall also has the effect of limiting the light control component, so that the structure of the lamp is more simple, and the lamp is easy to assemble.

[0024] The above description of the embodiments of the application is for the purpose of illustrating and describing, and is not intended to be exhaustive or to limit the application to the precise forms disclosed. Obviously, many modifications and variations are possible in view of the above teachings. It is intended that the application encompass these modifications and variations. The application is defined by the following claims.

Claims

1. A lamp comprising a lamp body and a light source, the lamp body comprising a bottom surface and a sidewall extending upwardly around the bottom surface, the sidewall having an end away from the bottom surface as a light outlet, the light source being arranged on the bottom surface of the lamp body and facing the light outlet, the lamp further comprising a reflector, the reflector comprising two ports of different sizes, the small end port of the reflector being close to the light source, the large end port of the reflector being connected to the end of the sidewall forming the light outlet, the lamp further comprising a light shielding wall, the light shielding wall being in the shape of a cylinder and having one end connected to the mounting surface of the light source and surrounding the light source and the other end connected to the outer surface of the reflector, an annular cavity being formed between the light shielding wall and the sidewall, a first through hole being formed on the bottom surface of the lamp body and leading to the outside of the lamp body, the first through hole being located between the light shielding wall and the sidewall, a second through hole being formed on the sidewall and leading to the outside of the lamp body, the first through hole and the second through hole forming a convection channel through the annular cavity.

2. The luminaire of claim 1, wherein, The lamp further comprises a light source mounting portion, the light source mounting portion being arranged on the bottom surface of the lamp body, the light source being arranged on the light source mounting portion, the light source mounting portion being provided with a light leakage prevention groove surrounding the light source, one end of the light shielding wall being inserted into the light leakage prevention groove.

3. The luminaire of claim 1, wherein, The bottom surface is provided with heat dissipation fins on the side away from the light source, and the first through hole is arranged between two heat dissipation fins.

4. The luminaire of claim 1, wherein, The lamp further comprises a face ring, the face ring being used to fix the lamp to a mounting surface, the lamp body being provided with a pivot shaft on the outside, the lamp body and the face ring being pivotally connected, and the pivot shaft being perpendicular to the light outlet direction of the light source.

5. The luminaire of claim 1, wherein, The light shielding wall is fixedly arranged on the outer surface of the reflector, and a spacing distance is arranged between the connecting portion and the small end port of the reflector.

6. The luminaire of claim 1, wherein, An optical cavity is formed between the small end port of the reflector and the light source in the light shielding wall, and a light distribution portion is arranged in the optical cavity, the light distribution portion being clamped between the small end port of the reflector and the light source, and the light distribution portion comprising a lens, a lens reflector and a light guide.

7. The luminaire of claim 1, wherein, The reflector and the light shielding wall are integrally formed.

8. The luminaire of claim 1, wherein, The lamp body comprises an upper cover and a lower cover, the lower cover comprising the bottom surface and a first connecting wall extending upwardly around the bottom surface, the upper cover comprising a second connecting wall, the second through hole being arranged on the second connecting wall, and the first connecting wall and the second connecting wall being connected to each other to form the sidewall of the lamp body.

9. The luminaire of claim 8, wherein, The second connecting wall is integrally formed with the reflector and the light shielding wall to form the upper cover.

10. The luminaire of any of claims 1-9, wherein, The lamp is a spotlight.

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