Direct type ultrathin down lamp

Abstract

The utility model discloses a direct type ultrathin down lamp which comprises a lamp panel, a lamp cup, a diffusion plate, a reflection bowl and a spring, the outer side face of the lamp cup is provided with a spring clamping groove, the edge area of the light-emitting face of the lamp panel is provided with an LED drive, the middle area of the light-emitting face of the lamp panel is provided with a plurality of evenly-arranged LED light-emitting chips, and the surfaces of the LED light-emitting chips are further provided with diffusion lenses. According to the direct type ultrathin down lamp, the spring clamping groove is additionally formed in the outer side face of the lamp body, the spring is fixed to the side face of the down lamp, the installation position of the spring is lowered, and therefore the thickness of the down lamp is reduced; when the spring is fixed, the spring clamping groove can disperse the force borne by the lamp cup from the spring, so that the structural strength of the spring and the whole down lamp is improved; the LED driver is arranged on the lamp panel, so that the thickness and the size of the down lamp are further reduced; through cooperation of the diffusion lens, the reflection bowl and the diffusion plate, a very soft and uniform light emitting effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lamps, in particular to a direct-down type ultra-thin downlight. Background Art

[0002] The downlight is a common lighting device in daily life and is favored by people for its practicality and aesthetics. The existing downlights are mainly divided into two types: direct-down type and side-in type based on the light-emitting mode. Among them, the direct-down type downlight has the advantages of high light efficiency and brightness. However, in order to avoid glare problems, its thickness is often large, and it has high requirements for the installation space. In addition, most of the existing downlights adopt external drive and back drive, resulting in a further increase in the volume and thickness of the downlight. At present, the existing direct-down type downlights with a small thickness, although achieving the ultra-thinness of the direct-down type downlight to a certain extent, still have too large a thickness and are difficult to further meet the market demand for the thickness of the downlight. Chinese Patent Grant Publication No. CN205447451U, the grant publication date is August 10, 2016, and the utility model name is an ultra-thin downlight, including a lamp body, a light-emitting aluminum substrate, a reflective ring, and a diffusion plate. Its disadvantage is that the torsion spring type fixing member is fixed at the upper end of the lamp body, raising the position of the torsion spring type fixing member, resulting in an unnecessary increase in the thickness of the lamp body. Moreover, since the torsion spring type fixing member is directly provided on the lamp body, the force when the torsion spring type fixing member is compressed is directly converted into the stress received by the lamp body, affecting the structural strength of the already weak ultra-thin downlight and increasing the risk of lamp body distortion and fracture. Summary of the Utility Model

[0003] In order to solve the disadvantage of the large thickness of the direct-down type downlight in the prior art, the utility model provides a direct-down type ultra-thin downlight with a small thickness, reliable structural strength of the spring and the lamp body, simple structure, and soft and uniform light emission.

[0004] One technical solution adopted by the utility model is as follows:

[0005] A direct-down type ultra-thin downlight includes a lamp board, a lamp cup, a diffusion plate, a reflecting bowl, and a spring. A spring slot is provided on the outer side surface of the lamp cup; an LED driver is provided in the edge area of the light-emitting surface of the lamp board; a plurality of uniformly arranged LED light-emitting chips are provided in the middle area of the light-emitting surface of the lamp board, and a diffusion lens is further provided on the surface of the LED light-emitting chips.

[0006] Preferably, the spring slot and the lamp cup are integrally formed.

[0007] Preferably, the spring is fixed on the outer side surface of the lamp cup through the spring slot.

[0008] Preferably, a lamp board buckle is provided on the inner side surface of the lamp cup, and a reflecting bowl buckle is provided at the cup mouth of the lamp cup.

[0009] Preferably, the lamp board is fixed to the inner top surface of the lamp cup through the lamp board buckle, and the reflecting bowl is fixed to the inside of the lamp cup through the reflecting bowl buckle.

[0010] Preferably, the reflecting bowl is a frustum-shaped annular structure with a small opening at the top and a large opening at the bottom, and covers the light-emitting surface of the lamp board through its top opening.

[0011] Preferably, the LED light-emitting chip and the diffusion lens are covered inside the top opening of the reflecting bowl, and the LED driver is covered outside the top opening of the reflecting bowl.

[0012] Preferably, a glue application groove is provided at the cup mouth of the lamp cup, and the diffusion plate is fixed to the cup mouth of the lamp cup through a sealant to seal the cup mouth.

[0013] Preferably, the distance between the highest point of the spring and the lower surface of the diffusion plate is between 14 mm and 19 mm, and the distance between the outer top surface of the lamp cup and the lower surface of the diffusion plate is between 12 mm and 17 mm.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. By adding a spring slot on the outer side surface of the lamp cup, the installation position of the spring is lowered, allowing the highest point of the spring to drop to a height almost consistent with the outer top surface of the lamp cup, making full use of the outer side space of the downlight and reducing the thickness and the required installation height of the downlight.

[0016] 2. By using the spring slot to fix the spring, while strengthening the side surface of the lamp cup, the force exerted on the lamp cup from the spring is dispersed, thereby increasing the structural strength and reliability of the spring and the entire ultra-thin downlight.

[0017] 3. By fixing the LED driver in the edge area of the lamp board, the deficiencies of the external driver and the back driver of the traditional downlight are avoided, further reducing the thickness and volume of the downlight.

[0018] 4. By refracting the light emitted by the LED light-emitting chip through the diffusion lens, and cooperating with the reflecting bowl and the diffusion plate, a very uniform light-emitting effect of the entire light-emitting surface of the downlight is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic cross-sectional structure view of a direct-down ultra-thin downlight provided by the present utility model.

[0020] Figure 2 is a schematic enlarged structure view of part A of a direct-down ultra-thin downlight provided by the present utility model.

[0021] Figure 3It is an exploded structural schematic diagram of a direct-down type ultra-thin downlight provided by the present utility model.

[0022] In the figure: lamp board 1, LED light-emitting chip 11, diffusing lens 12, LED driver 13, lamp cup 2, spring slot 21, lamp board buckle 22, reflector bowl buckle 23, glue application groove 24, diffusing plate 3, reflector bowl 4, spring 5. Specific embodiments

[0023] The technical solution of the present utility model will be further described in more detail below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1 to 3The utility model provides a direct-down ultra-thin downlight, including a lamp board 1, a lamp cup 2, a diffuser plate 3, a reflector bowl 4 and a spring 5. Among them, the outer side surface of the lamp cup 2 is provided with spring slots 21, symmetrically arranged on both sides of the outer side surface of the lamp cup 2, with a quantity of 2, one on each side. The spring slots 21 and the lamp cup 2 are integrally formed, built into the side wall of the lamp cup 2 and leaving a gap in the side wall for clamping the coil end of the spring 5. The quantity of the spring 5 corresponds to the quantity of the spring slots 21. Its coil passes through the gap on the lamp cup 2 above the spring slots 21, and the coil end of the spring 5 is fixed by the spring slots 21, so that the handle of the spring 5 extends outward, fixing the spring 5 on the outer side surface of the lamp cup 2, allowing the spring 5 to fix the entire downlight on places such as the ceiling or wall. The diameter of the spring 5 is between 4 mm and 7 mm. Preferably, for the downlight of this embodiment, this distance can be as small as 4 mm. The height of the spring slots 21 is between 5 mm and 8 mm. Preferably, for the downlight of this embodiment, this distance can be as small as 5 mm. By fixing the spring 5 on the outer side surface of the lamp cup 2, the space on the outer side surface of the lamp cup 2 is fully utilized, reducing the overall thickness of the downlight. The distance between the highest point of the spring 5 and the lower surface of the diffuser plate 3 is between 14 mm and 19 mm. Preferably, for the downlight of this embodiment, this distance can be as small as 14 mm. The distance between the outer top surface of the lamp cup 2 and the lower surface of the diffuser plate 3 is between 12 mm and 17 mm. Preferably, for the downlight of this embodiment, this distance can be as small as 12 mm. Through a simple structure and a compact design, the ultra-thinness of the downlight can be achieved to a great extent, significantly reducing the space required for installing the downlight and adapting to a narrower installation environment. Different from the spring fixing parts of traditional downlights that are additionally installed on the side of the lamp body through components such as screws or slots, for the downlight of this embodiment, the spring slots 21 and the lamp cup 2 are integrally formed, allowing the direct production of the downlight housing with this structure during injection molding, reducing the processing steps, and no additional tools are required to fix the spring 5 during the actual installation of the downlight, thus improving the assembly efficiency. At the same time, the spring slots 21 built into the side wall of the lamp cup 2 can also reinforce the side wall of the lamp cup 2, disperse the force exerted on the lamp cup 2 due to the compression of the spring 5 during the installation of the downlight, relieve the structural stress on the entire downlight, reduce the risk of deformation or fracture of the lamp cup 2, ensure the reliability of the spring 5 and improve the structural strength of the entire downlight. In addition, with this structure and fixing method, most of the coil of the spring 5 will be hidden inside the lamp body, and only a part of the surface of its coil is exposed outside, which can reduce the impact of the spring 5 on the overall appearance of the downlight to a certain extent.

[0025] The LED driver 13 is fixed at the edge area of the lamp board 1, within the gap between the reflecting bowl 4 and the lamp cup 2, and is connected to an external power supply through a power cord to provide the specific current and voltage required for the normal operation of the LED light-emitting chip 11. For most existing direct-down cylindrical lamps with a small thickness and equipped with a reflective component, the gap with an approximately triangular cross-section formed between a reflective component similar to the reflecting bowl 4 and a lamp body similar to the lamp cup 2 is difficult to utilize. A scheme to reduce the volume of this gap is to change the inclination angle of the reflecting surface of the reflecting bowl 4 so that its reflecting surface is as close as possible to the inner side surface of the lamp cup 2. By adopting this scheme, the angle between the reflecting surface of the reflecting bowl 4 and the lamp board 1 will gradually approach a right angle, the volume of the triangular gap space will be reduced, and the available area of the inner top surface of the lamp cup 2 will be increased, allowing a larger lamp board 1 to be accommodated, and thus allowing more LED light-emitting chips 11 and diffusing lenses 12 to be accommodated. Although for an ultra-thin cylindrical lamp with a small thickness and a small volume, an increase in the area of the lamp board 1 will mean an expansion of the light-emitting surface and an enhancement of the light efficiency, it is obvious that such a change in the inclination angle of the reflecting surface of the reflecting bowl 4 will greatly weaken the role that the reflecting bowl 4 can play as a reflective component, making the existence of the reflecting bowl 4 almost meaningless, and the light emitted by the cylindrical lamp becomes more concentrated, increasing the possibility of glare and uneven light emission problems. For the cylindrical lamp of this embodiment, by placing the LED driver 13 in this gap, the originally difficult-to-utilize space is utilized, without sacrificing the role of the reflecting bowl 4 as a reflective component, nor blocking the light emitted by the LED light-emitting chips 11 in the middle area, and directly eliminating the increase in the thickness and volume of the cylindrical lamp caused by the occupation of the external space of the cylindrical lamp in the case of an external driver and a rear driver, further reducing the thickness of the cylindrical lamp and the required installation space while ensuring the overall light efficiency of the cylindrical lamp.

[0026] In the middle area of the light-emitting surface of the lamp board 1, a number of uniformly arranged LED light-emitting chips 11 are provided, and a corresponding diffusing lens 12 is further provided on the surface of each LED light-emitting chip 11. The diffusing lens 12 is in the shape of a pie close to a hemisphere, with a flat light incident surface and a curved light exit surface. A groove for accommodating the LED light-emitting chip 11 is provided in the light incident surface part of each diffusing lens 12, and its shape fits the LED light-emitting chip 11, allowing the LED light-emitting chip 11 to be completely embedded in the groove of the diffusing lens 12. An LED light-emitting chip 11 and a diffusing lens 12 are combined together to form a single lamp bead. A number of lamp beads are uniformly arranged and fixed on the light-emitting surface of the lamp board 1. Preferably, for the downlight of this embodiment, 4 lamp beads are provided in the center of the light-emitting surface of the lamp board 1, forming a square shape, and each lamp bead is located at the 4 vertices of the square respectively; along the directions of the 2 diagonals of the square, extension lines of the diagonals are drawn outward from each vertex respectively, a total of 4 extension lines are drawn, and 2 lamp beads are uniformly arranged on each extension line, and there are 8 lamp beads arranged on the extension lines in total; along the directions of the 4 sides of the square, extension lines of the sides are drawn outward from each vertex respectively, a total of 8 extension lines are drawn, and 2 lamp beads are uniformly arranged on each extension line, and there are 16 lamp beads arranged on the extension lines in total; 1 lamp bead is provided between each diagonal extension line and each side extension line, and there are 4 lamp beads provided between the diagonal extension lines and the side extension lines. With this layout, from the middle area to the edge area of the light-emitting surface of the lamp board 1, there are successively: 4 lamp beads forming a square, 12 lamp beads forming a circle, and 20 lamp beads forming a circle, totaling 36 lamp beads. On the entire light-emitting surface of the lamp board 1, the lamp beads are evenly distributed, so that the light emitted by each lamp bead intersects and overlaps with each other, minimizing the area of the shadow area to the greatest extent, reducing the glare problem, and ensuring uniform light output of the downlight.

[0027] For the downlight of this embodiment, the light emitted from the LED light-emitting chip 11 becomes more divergent after being refracted by the diffusing lens 12, thereby reducing the brightness of the middle area of the light-emitting surface of the lamp board 1, making the illumination of the middle area of the light-emitting surface of the downlight uniform and reducing the influence brought by glare. The reflecting bowl 4 is a frustum-shaped annular structure with a small opening at the top and a large opening at the bottom. The opening at its top covers the light-emitting surface of the lamp board 1, abuts against the lamp board 1 and covers all the LED light-emitting chips 11 and the diffusing lens 12 on the lamp board 1 inside it. The reflecting bowl 4 reflects the light from the LED light-emitting chip 11, causing the light that originally shoots towards the inner side surface of the lamp cup 2 to shoot towards the edge area of the light-emitting surface of the downlight, enhancing the illumination of the edge area of the light-emitting surface of the downlight. The diffusing plate 3 is fixed at the cup mouth of the lamp cup 2 and closes the cup mouth, receiving the light from the light-emitting surface of the lamp board 1 and the reflecting bowl 4, and making the light diverge further before emitting. Specifically, the thickness, haze, and light transmittance of the diffusing plate 3 are selected according to the distance between the outer top surface of the lamp cup 2 and the lower surface of the diffusing plate 3. In some embodiments, based on the distance between the outer top surface of the lamp cup 2 and the lower surface of the diffusing plate 3 being 17 mm, the selected thickness is 1.5 mm to 2 mm, the haze is 88% to 92%, and the light transmittance is 80% to 90%. Preferably, for the downlight of this embodiment, based on the distance between the outer top surface of the lamp cup 2 and the lower surface of the diffusing plate 3 being 12 mm, the selected thickness is 1.2 mm, the haze is 95%, and the light transmittance is 80%.

[0028] For the downlight of this embodiment, the realization of the uniform light-emitting effect mainly relies on the diffusion lens 12, the reflector bowl 4 and the diffusion plate 3 to change the light path. For the light rays whose initial propagation direction is perpendicular to the light-emitting surface of the lamp board 1, the propagation direction of the light rays is not affected before reaching the diffusion plate 3, and is scattered and emitted from the downlight in random directions after reaching the diffusion plate 3; for the light rays whose initial propagation direction is towards the diffusion plate 3 and not perpendicular to the light-emitting surface of the lamp board 1, the light rays are refracted after reaching the diffusion lens 12 and emitted from the diffusion lens 12 in a direction farther away from the center of the lamp board 1. A part of the light rays are scattered and emitted from the downlight in random directions after reaching the diffusion plate 3, and another part of the light rays are reflected and emitted from the reflector bowl 4 in a direction closer to the center of the lamp board 1, and are scattered and emitted from the downlight in random directions after reaching the diffusion plate 3; for the light rays whose initial propagation direction is towards the reflector bowl 4, the light rays are refracted after reaching the diffusion lens 12 and emitted from the diffusion lens 12 in a direction farther away from the center of the lamp board 1, are reflected and emitted from the reflector bowl 4 in a direction closer to the center of the lamp board 1, and are scattered and emitted from the downlight in random directions after reaching the diffusion plate 3. Through the refraction, reflection and scattering of the diffusion lens 12, the reflector bowl 4 and the diffusion plate 3, the very concentrated light rays originally emitted from the LED light-emitting chips 11 are dispersed within a large range, and the point light sources from multiple LED light-emitting chips 11 are diverged and integrated into a surface light source from the diffusion plate 3, which neither makes the middle area of the light-emitting surface of the downlight too bright nor makes the edge area of the light-emitting surface of the downlight too dim, balancing the local light effects of the middle area and the edge area and realizing the uniform light effect of the entire light-emitting surface.

[0029] Inside the lamp cup 2, there are lamp board buckles 22 for fixing the lamp board 1 and reflector bowl buckles 23 for fixing the reflector bowl 4. For the lamp board buckles 22, their positions are on the inner side surface of the lamp cup 2, within the gap formed by the reflector bowl 4 and the lamp cup 2 with a cross-section approximately triangular in shape, and are symmetrically arranged on both sides of the inner side surface of the lamp cup 2, with a quantity of 2, one on each side. For the reflector bowl buckles 23, their positions are at the cup mouth of the lamp cup 2, and are arranged at the four equal division points of the circumference formed by the cup mouth of the lamp cup 2, with a quantity of 4, one at each equal division point. In some embodiments, hot melt positioning posts can be additionally provided on the inner top surface of the lamp cup 2, and hot melt positioning holes can be additionally provided in the edge area of the lamp board 1, allowing the lamp board 1 to be fixed on the inner top surface of the lamp cup 2 through hot melt adhesive, and cooperating with the lamp board buckles 22 to achieve a more stable installation. Preferably, for the downlight of this embodiment, the hot melt positioning posts and hot melt positioning holes can be omitted, allowing the lamp board 1 to be directly fixed on the inner top surface of the lamp cup 2 by pressing through the lamp board buckles 22 without more complex installation methods and steps. Similarly, it is allowed to directly press the reflector bowl 4 against the lamp board 1 and fix the reflector bowl 4 inside the lamp cup 2 through the reflector bowl buckles 23 without additional installation parts or tools, enabling a simpler and more convenient assembly. Additionally, a sealant groove 24 is provided at the cup mouth of the lamp cup 2, and its depth is slightly greater than the thickness of the diffuser plate 3, allowing the diffuser plate 3 to be fixed at the cup mouth of the lamp cup 2 through sealant, being flush with the cup mouth of the lamp cup 2 and sealing the entire downlight, blocking dust and other debris from entering the inside of the downlight, and at the same time enhancing the waterproof performance of the downlight.

[0030] The embodiments of the present utility model described above are only specific implementation manners of the present utility model, without elaborating on all details, nor are they limitations on the scope of the patent of the present utility model. For those of ordinary skill in the art of this technology, any modifications or equivalent replacements made based on the description of the present utility model, as long as they do not depart from the spirit and scope of the technical solution of the present utility model, should be covered within the scope of the patent protection of the present utility model.

Claims

1. A direct-down ultra-thin downlight, comprising a lamp panel (1), a lamp cup (2), a diffuser (3), a reflector bowl (4) and a spring (5), characterized in that: The outer side surface of the lamp cup (2) is provided with a spring clamping groove (21); An LED driver (13) is provided in the edge area of ​​the light-emitting surface of the light board (1); A plurality of evenly arranged LED light-emitting chips (11) are provided in the middle area of ​​the light-emitting surface of the lamp panel (1), and a diffusion lens (12) is also provided on the surface of the LED light-emitting chip (11).

2. The direct-down ultra-thin downlight according to claim 1, characterized in that: The spring clamping groove (21) and the lamp cup (2) are integrally formed.

3. The direct-down ultra-thin downlight according to claim 1, characterized in that: The spring (5) is fixed to the outer side surface of the lamp cup (2) through the spring clamping groove (21).

4. The direct-down ultra-thin downlight according to claim 1, characterized in that: The inner side surface of the lamp cup (2) is provided with a lamp board buckle (22), and the cup mouth of the lamp cup (2) is provided with a reflective bowl buckle (23).

5. The direct-down ultra-thin downlight according to claim 4, characterized in that: The lamp board (1) is fixed to the inner top surface of the lamp cup (2) via the lamp board buckle (22), and the reflective bowl (4) is fixed inside the lamp cup (2) via the reflective bowl buckle (23).

6. The direct-down ultra-thin downlight according to claim 1, characterized in that: The reflective bowl (4) is a truncated cone-shaped annular structure with a small top opening and a large bottom opening, and is disposed on the light-emitting surface of the light panel (1) through its top opening.

7. A direct-down ultra-thin downlight according to claim 1 or 6, characterized in that: The LED light emitting chip (11) and the diffusion lens (12) are covered on the inner side of the top opening of the reflection bowl (4), and the LED driver (13) is covered on the outer side of the top opening of the reflection bowl (4).

8. The direct-down ultra-thin downlight according to claim 1, characterized in that: The cup mouth of the lamp cup (2) is provided with a glue groove (24), and the diffusion plate (3) is fixed to the cup mouth of the lamp cup (2) by means of a sealant to seal the cup mouth.

9. A direct-down ultra-thin downlight according to claim 3 or 8, characterized in that: The distance between the highest point of the spring (5) and the lower surface of the diffuser plate (3) is between 14 mm and 19 mm, and the distance between the outer top surface of the lamp cup (2) and the lower surface of the diffuser plate (3) is between 12 mm and 17 mm.

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