Lamp

Abstract

The lamp comprises a lamp body, a light source and a reflector, the lamp body comprises a bottom face and a side wall extending upwards around the bottom face, a light outlet is formed in the end, away from the bottom face, of the side wall, the light source is arranged on the bottom face of the lamp body and emits light towards the light outlet, the small end of the reflector is close to the light source, and the large end of the reflector is connected with the end edge of the side wall to form the light outlet. The lamp further comprises a light shading wall, one end of the cylindrical light shading wall is connected with the installation face of the light source and surrounds the light source, the other end of the light shading wall is connected with the outer side face of the reflector, an annular cavity is formed between the light shading wall and the side wall, and a first through hole leading to the outer side of the lamp body is formed in the bottom face and located between the light shading wall and the side wall. A second through hole leading to the outer side of the lamp body is formed in the side wall, and the first through hole and the second through hole form a convection channel penetrating through the annular cavity. The convection channel increases air convection so as to reduce the temperature of the lamp body. And the shading wall wraps the optical system therein, so that the light leakage prevention effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of lighting, in particular to a lamp. Background Art

[0002] LED lighting has the characteristics of low energy consumption, green environmental protection, and long service life. It 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 such as handicrafts, jewelry, antiques, artistic photo patterns, product displays, boutique display windows, etc. due to their higher brightness. During the use of high-power LED spotlights, the high-power LED light source generates heat, which can easily cause the temperature of the entire high-power LED spotlight to continue to rise, and it is easy to damage the high-power LED lamp, 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, the existing solution is to install a heat sink on the lamp body. However, the heat sink is sufficient for the heat dissipation of low-power spotlights, but for the heat dissipation of high-power spotlights, the heat sink alone is not enough. Utility Model Content

[0003] The purpose of the utility model is to at least solve the above problems and provide a lamp with good heat dissipation performance, simple structure and no light leakage.

[0004] In order to realize the above functions, the technical scheme adopted by the utility model is to provide a lamp, comprising a lamp body and a light source, wherein the lamp body comprises a bottom surface and a side wall extending upward around the bottom surface, wherein one end of the side wall away from the bottom surface is a light outlet, and the light source is arranged on the bottom surface of the lamp body and emits light facing the light outlet, and the characteristic is that: the lamp also comprises a reflector, wherein the reflector comprises two ports of different sizes, wherein the small end of the reflector is close to the light source, and the large end of the reflector is connected to the end edge of the side wall to form the light outlet, and the lamp also comprises a light shielding wall, wherein one end of the light shielding wall is cylindrical and connected to the mounting surface of the light source and surrounds the light source, and the other end is connected to the outer side surface of the reflector, and an annular cavity is formed between the light shielding wall and the side wall, and a first through hole leading to the outside of the lamp body is provided on the bottom surface, wherein the first through hole is located between the light shielding wall and the side wall, and a second through hole leading to the outside of the lamp body is provided on the side wall, and the first through hole and the second through hole form a convection channel passing through the annular cavity.

[0005] Furthermore, the lamp also includes a light source mounting portion, which is arranged on the bottom surface inside the lamp body, the light source is arranged on the light source mounting portion, and the light source mounting portion is provided with an anti-leakage light groove surrounding the light source, and one end of the light-shielding wall is inserted into the anti-leakage light groove.

[0006] Furthermore, a heat dissipation fin is provided on a side of the bottom surface facing away from the light source, and the first through hole is provided between two heat dissipation fins.

[0007] Furthermore, the lamp also includes a face ring, which fixes the lamp to a mounting surface, a pivot axis is provided on the outside of the lamp body, the lamp body and the face ring are pivotally connected, and the pivot axis is perpendicular to the light emitting direction of the light source.

[0008] Furthermore, the light shielding wall is fixedly arranged on the outer side surface of the reflector, and a spacing distance is arranged between the connection point and the small end port of the reflector.

[0009] Furthermore, an optical cavity is formed in the light-shielding wall between the small end port of the reflector and the light source, and a light distribution part is provided in the optical cavity. The light distribution part is clamped between the small end port of the reflector and the light source, and the light distribution part includes a lens, a lens reflector, and a light guide.

[0010] Furthermore, the reflector and the light-shielding wall are integrally formed.

[0011] Furthermore, the lamp body includes an upper cover and a lower cover, the lower cover includes the bottom surface and a first connecting wall surrounding the bottom surface and extending upward, the upper cover includes a second connecting wall, the second through hole is arranged on the second connecting wall, and the first connecting wall and the second connecting wall are interconnected to form the side wall of the lamp body.

[0012] Furthermore, the second connecting wall, the reflector and the light-shielding wall are integrally formed to form the upper cover.

[0013] Furthermore, it is characterized in that: the lamp is a high-power spotlight.

[0014] The lamp provided by the utility model has holes opened at the heat dissipation fins of the heat dissipation lamp body and holes opened on the side to form an air convection channel, thereby increasing air convection and reducing the temperature of the lamp body. The light shielding wall wraps the optical system therein to prevent light leakage. At the same time, the light shielding wall also serves as a limit light control component, making the lamp structure more concise and easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a lamp according to a preferred embodiment of the utility model;

[0016] Figure 2 It is a cross-sectional view of a lamp in a preferred embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the lower cover of the lamp body in a lamp of a preferred embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the upper cover of the lamp body in a lamp of a preferred embodiment of the utility model;

[0019] Figure 5 It is a structural schematic diagram of a light source installation portion in a lamp of a preferred embodiment of the utility model;

[0020] Figure 6 It is a schematic diagram of the airflow in the heat dissipation channel of a lamp in a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0021] The lamp provided by the utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a schematic diagram of the structure of a preferred embodiment of the present application. Figure 2 This is a cross-sectional view of the embodiment, which is a high-power spotlight. As shown in the figure, the lamp includes a light source 3, a lamp body 1, and a face ring 2.

[0023] The face ring 2 is provided with a spring assembly 7 for fixing the lamp on the mounting surface. Spotlights are generally installed on mounting surfaces such as ceilings and suspended ceilings. During installation, a hole is first opened on the mounting surface, and the lamp body 1 passes through the hole. The spring assembly 7 and the face ring 3 are respectively arranged on both sides of the mounting surface and clamped on the mounting surface to achieve lamp installation.

[0024] The lamp body 1 includes a bottom surface 1011 and a side wall extending upward around the bottom surface 1011. In this embodiment, the lamp body includes an upper cover 102 and a lower cover 101, so the side wall 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. The end of the side wall away from the bottom surface 1011 is a light outlet 1023. In this embodiment, the light outlet 1023 is arranged at an end of the upper cover 102 away from the lower cover 101. In other preferred embodiments, the lamp body can also be an integrated design, which is not limited in this application. The light source 3 is arranged on the bottom surface 1011 of the lamp body 1 and emits light facing the light outlet 1023. A pivot shaft 1021 is also arranged on the outer side of the lamp body 1, and the lamp body 1 is pivotally connected to the face ring 2 through the pivot shaft 1021. The pivot axis 1021 is perpendicular to the light emitting direction of the light source 3 , and the angle of the lamp body 1 can be adjusted along the axis of the pivot axis 1021 , thereby achieving the adjustment of the light emitting angle of the spotlight.

[0025] 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, a heat dissipation fin 1013 is arranged on the side of the bottom surface 1011 away from the light source 3. For ordinary spotlights, the heat dissipation requirements can be met by the heat dissipation fins 1013, but for high-power spotlights, the temperature inside the lamp body is higher, and it is a bit difficult to dissipate heat only through the heat dissipation fins 1013. Moreover, the arrangement of the light source 3 also has a certain influence on the heat dissipation. In some embodiments, the light source board is directly attached to the bottom surface 1011, and the heat is directly conducted to the heat dissipation fins 1013 through the bottom surface 1011. This solution has a good heat dissipation effect, but the contact between the light source 3 and the metal lamp body does not meet the insulation isolation requirements of the lamp. In order to comply with safety regulations and achieve insulation isolation, one solution is to use a non-metallic shell, and another solution is to set a light source mounting part 4 between the light source 3 and the bottom surface 1011, first install the light source mounting part 4 on the bottom surface 1011, and the light source 3 is arranged on the light source mounting part 4. In this embodiment, a COB light source is used, and the light source mounting part 4 is as follows Figure 5 The light source bracket shown. Whether a non-metallic shell is used or a light source mounting portion 4 is provided, the heat dissipation efficiency of the lamp will be reduced, causing the temperature inside the lamp body 1 to be too high. To solve this problem, the present embodiment opens a first through hole 1012 on the bottom surface 1011 leading to the outside of the lamp body 1, and opens a second through hole 1022 on the side wall leading 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 takes the heat inside the lamp body 1 out of the bottom surface 1011, and the first through hole 1012 is located between two heat dissipation fins 1013, which can better achieve heat dissipation.

[0026] The lamp of the embodiment includes a two-stage light distribution system. A light distribution unit 8 is provided on the light source 3 to realize the first-stage light distribution. The light emitted by the light source 3 first passes through the light distribution unit 8 and then passes through the reflector 6 for the second-stage light distribution. The small end of the reflector 6 is connected close to the light source 3 and the light emitting surface of the light distribution unit 8, and the large end of the reflector 6 is connected to the outer end edge of the second connecting wall 1024 of the upper cover 102 to form the light outlet 1023 of the lamp body 1. In this embodiment, the light distribution unit 8 includes a lens bracket 801 and a lens 802. In other preferred embodiments, the light distribution unit 8 can also select optical elements such as lens reflectors and light guides, and this application does not limit this.

[0027] As mentioned above, in order to meet the heat dissipation requirements, a hole is opened in the side wall of the lamp body 1, and the hole on the side wall will cause light leakage. The spotlight in the embodiment is a spotlight with an angle adjustment structure. The lamp body 1 and the face ring 2 bracket are pivoted by the pivot shaft 1021, and the lamp body 1 can rotate relative to the face ring 2. Therefore, there is a gap between the lamp body 1 and the face ring 2, and the light leaking from the second through hole 1022 on the side wall of the lamp body 1 will pass through this gap and be observed by the user. 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 to the light outlet 1023, and the light will not leak from the side. The light leakage mainly occurs in the part of the lens 802. Even if a total internal reflection lens is used 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 shine, so that a shining lens outline can be seen from the outside. In order to avoid this phenomenon, the lamp in this embodiment also includes a light shielding wall 5, and the light shielding wall 5 is cylindrical, 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 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 the two, and the first through hole 1012 is located between the light shielding wall 5 and the side wall, and the first through hole 1012 and the second through hole 1022 form a convection channel that passes through the annular cavity. Figure 6 As shown. The narrow, vertical convection channel between the light-shielding wall 5 and the side wall is conducive to the chimney effect, making the exhaust effect more obvious, thereby accelerating the air flow rate. Such a design not only plays the role of taking the heat out of the lamp body 1, but also avoids light leakage from the lamp body. The light-shielding wall 5 is arranged on the outer side of the reflector 6, which reasonably utilizes the internal space of the lamp. The width of the lamp body 1 is not increased due to the need to set up the convection channel, making the lamp body more compact. In other preferred embodiments, the light distribution part 8 may 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.

[0028] In order to better achieve the effect of preventing light leakage, such as Figure 5 The light source installation part 4 shown includes a mounting substrate 401, on which a light source mounting groove 403 is provided, and a light leakage prevention groove 402 is also provided 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 light leakage from the bottom. Of course, in other preferred embodiments, if it is not included Figure 5 The light source bracket is configured such that the bottom surface 1011 is directly used as the light source mounting portion 4 , and a groove surrounding the light source 3 can be directly provided on the bottom surface 1011 as the light leakage prevention groove 403 .

[0029] The structure of the lower cover 101 in this embodiment is as follows Figure 3As shown, the lower cover 101 includes 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 on the bottom surface 1011. Figure 1 It can be seen that the heat dissipation fins 1013 of this embodiment are also arc-shaped, and the first through hole 1012 is arranged between the two outermost heat dissipation fins 1013. In other preferred embodiments, the heat dissipation fins 1013 may be divergent, and the first through holes 1012 may be equidistantly distributed along the circumference between the two heat dissipation fins 1013. The specific form of the first through holes 1012 may be flexibly arranged according to the layout of the heat dissipation fins 1013 of the lamp.

[0030] The structure of the upper cover 102 in this embodiment is as follows Figure 4As shown, the upper cover 102 includes a second connecting wall 1024, and in this embodiment, the second through hole 1023 is arranged on the second connecting wall 1024. The second through hole is arranged at a position close to the light outlet 1023 to increase the length of the convection channel and take away more heat. In other preferred implementations, the second through hole 1023 can also be arranged on the first connecting side wall 1014 of the lower cover 101, or the second through hole 1023 is arranged on the first connecting wall 1014 and the second connecting wall 1024. A buckle 1025 is also arranged on the second connecting wall 1024, and a matching card groove is arranged on the first connecting wall 1014, and 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 preferred embodiments, the first connecting wall 1014 and the second connecting wall 1024 can also be connected by threaded connection, connecting piece connection, etc., which is not limited in this application. In this embodiment, the second side wall 1024, the reflector 6, and the light shielding wall 5 are integrally formed to form 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, and a spacing distance is left between the connection and the small end port of the reflector 6. Due to the spacing distance between the connection of the light shielding wall 5 and the small end port of the reflector 6, the diameter of the light shielding wall 5 is larger than the diameter of the small end port of the reflector 6, and the size of the light distribution part 8 in the embodiment is designed according to the thickness of the light shielding wall 5, that is, the diameter of the light distribution part 8 at the largest point is also larger than the diameter of the small end port of the reflector 6, so the port plays an axial limit role, and the light distribution part 8 will not fall out, and there is no need to set up a positioning structure separately. In this embodiment, the light distribution part includes a lens bracket 801 and a lens 802, and the lens 802 is positioned and installed by the lens bracket. When designing, the lens bracket 801 is matched with the light shielding wall 5, and the diameter of the lens bracket 801 is close to the diameter of the light shielding wall 5, and the light shielding wall 5 limits the lens bracket circumferentially. The height of the lens bracket 801 just meets the requirement that the lens bracket 802 is sandwiched by the small end port of the reflector 6 and the light source mounting part 4 after installation. In order to facilitate positioning, a positioning hole is provided on the light source mounting part 4, and a positioning column is provided on the lens bracket. During installation, the light source 3 is first installed on the bottom surface 1011 of the lamp body through the light source mounting part 4. After the lens 802 and the lens bracket 801 are assembled, the positioning column of the lens bracket 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, and the light shielding wall 5 is inserted into the anti-light leakage groove 402. The small end port of the reflector 6 fixes the light distribution part 8 from the axial direction, and the light shielding wall 5 limits the light distribution part 8 in the circumferential direction. In this way, the lamp body can be assembled and each internal component can be fixed in only one step, which is easy to assemble.

[0031] In other embodiments, the reflector 6 and the light-shielding wall 5 may also be configured as an integral part, and after the internal light-control components are fixed by the reflector 6 and the light-shielding wall 5, the reflector 6 is fixed to the side wall port of the lamp body 1, and the present application does not limit this.

[0032] The above description of the preferred embodiments of the present invention is for illustration and description, and is not intended to be exhaustive or limited to the specific forms disclosed. Obviously, many modifications and changes may be made, which may be obvious to those skilled in the art and should be included in the scope of the present invention defined by the appended claims.

Claims

1. A lamp, comprising a lamp body and a light source, wherein the lamp body comprises a bottom surface and a side wall extending upward around the bottom surface, wherein one end of the side wall away from the bottom surface is a light outlet, and the light source is arranged on the bottom surface of the lamp body and emits light facing the light outlet, characterized in that: The lamp also includes a reflector, which includes two ports of different sizes. The small end of the reflector is close to the light source, and the large end of the reflector is connected to the end of the side wall to form the light outlet. The lamp also includes a light-shielding wall. The light-shielding wall is cylindrical and one end is connected to the mounting surface of the light source and surrounds the light source, and the other end is connected to the outer side of the reflector. An annular cavity is formed between the light-shielding wall and the side wall. A first through hole leading to the outside of the lamp body is opened on the bottom surface, and the first through hole is located between the light-shielding wall and the side wall. A second through hole leading to the outside of the lamp body is opened on the side wall, and the first through hole and the second through hole form a convection channel passing through the annular cavity.

2. The lamp according to claim 1, characterized in that: The lamp also includes a light source mounting portion, which is arranged on the bottom surface inside the lamp body, the light source is arranged on the light source mounting portion, and the light source mounting portion is provided with an anti-leakage light groove surrounding the light source, and one end of the light-shielding wall is inserted into the anti-leakage light groove.

3. The lamp according to claim 1, characterized in that: A heat dissipation fin is arranged on the side of the bottom surface facing away from the light source, and the first through hole is arranged between two heat dissipation fins.

4. The lamp according to claim 1, characterized in that: The lamp also includes a face ring, which fixes the lamp to a mounting surface. A pivot axis is disposed outside the lamp body. The lamp body and the face ring are pivotally connected, and the pivot axis is perpendicular to the light emitting direction of the light source.

5. The lamp according to claim 1, characterized in that: The light shielding wall is fixedly arranged on the outer side surface of the reflector, and a spacing distance is arranged between the connection point and the small end port of the reflector.

6. The lamp according to claim 1, characterized in that: An optical cavity is formed between the small end port of the reflector and the light source in the light-shielding wall. A light distribution unit is arranged in the optical cavity. The light distribution unit is sandwiched between the small end port of the reflector and the light source. The light distribution unit includes a lens, a lens reflector, and a light guide.

7. The lamp according to claim 1, characterized in that: The reflector and the light shielding wall are integrally formed.

8. The lamp according to claim 1, characterized in that: The lamp body includes an upper cover and a lower cover, the lower cover includes the bottom surface and a first connecting wall surrounding the bottom surface and extending upward, the upper cover includes a second connecting wall, the second through hole is arranged on the second connecting wall, and the first connecting wall and the second connecting wall are interconnected to form the side wall of the lamp body.

9. The lamp according to claim 8, characterized in that: The second connecting wall, the reflector and the light shielding wall are integrally formed to form the upper cover.

10. The lamp according to any one of claims 1 to 9, characterized in that: The lamp is a high-power spotlight.

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