一种灯具

Abstract

本申请公开了一种灯具，包括：壳体、设置在所述壳体内部的光源，以及设置在所述壳体的出光口的扩散片，所述扩散片由塑料制成；所述壳体至少与所述扩散片接触的部位由塑料制成，使得所述扩散片与所述壳体之间通过超声焊接联结在一起；其中，所述壳体上与所述扩散片接触的接触面和所述扩散片与所述壳体接触的联结面之中的至少一个设有突起的焊接迹线，所述焊接迹线具有虚拟中线，所述焊接迹线连续围绕所述虚拟中线、呈之字形蜿蜒延伸，或分段跨越所述虚拟中线、呈鱼鳞状重叠，使得所述焊接迹线的总长度超过所述虚拟中线的周长，工件间联结强度提高。

Claims

1. A luminaire (10) characterized by, include: The housing (20), the light source (30) disposed inside the housing, and the diffuser (40) disposed at the light outlet of the housing, the diffuser (40) being made of plastic; The housing (20) is made of plastic at least in the portion that contacts the diffuser (40), such that the diffuser (40) and the housing are joined together by ultrasonic welding; At least one of the contact surface of the housing (20) that contacts the diffuser plate (40) and the connecting surface of the diffuser plate (40) that contacts the housing (20) is provided with a protruding welding trace (50). The welding trace (50) has a virtual center line (55). The welding trace (50) extends continuously around the virtual center line (55) in a zigzag pattern, or crosses the virtual center line (55) in segments and overlaps in a fish-scale pattern, so that the total length of the welding trace (50) exceeds the circumference of the virtual center line (55).

2. The luminaire (10) according to claim 1, characterized in that The total length of the welding trace (50) is at least twice the perimeter of the virtual centerline (55).

3. The luminaire (10) according to claim 2, characterized in that The welding trace (50) is located on the diffuser plate (40).

4. The luminaire (10) according to claim 3, characterized in that The inner wall of the housing (20) has a shoulder (25), and the diffuser (40) is ultrasonically welded to the shoulder (25).

5. The luminaire (10) according to claim 4, characterized in that The shoulder (25) of the housing (20) is provided with a flange (27) located at the end of the shoulder (25) facing the interior of the light outlet, extending in a direction away from the light source.

6. The luminaire (10) according to claim 5, characterized in that The height (h) of the flange (27) protruding from the shoulder (25) is less than the original height of the weld trace (50) on the diffuser plate; and after the diffuser plate (40) and the housing (20) are joined together by ultrasonic welding, the height of the flange (27) protruding from the shoulder (25) is less than or equal to the height (H) of the weld trace after fusion.

7. The luminaire (10) of claim 1, characterized in that The lamp (10) is a downlight.

8. The luminaire (10) according to claim 7, characterized in that The lamp (10) is a circular downlight, the light outlet and the diffuser (40) are circular in shape, and the virtual center line (55) is also circular.

9. The luminaire (10) according to claim 8, characterized in that The light source (30) is an LED array discretely mounted on a PCB or a board-mounted LED module (CoB).

10. The luminaire of claim 9, wherein, A pair of mounting springs (80) are provided on the outside of the housing (20).

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