A T8 lamp

Abstract

The utility model discloses a T8 lamp tube, including the light transmission lamp tube, the light transmission lamp tube has the through cavity that penetrates along the axial direction, and the characteristic is that the illumination light source is provided with the through cavity one end port, and the illumination light source's irradiation direction is toward the other end port of through cavity, and the cover of illumination light source is provided with the refracting lens, and the other end port of through cavity is provided with the reflector, and the refracting lens is opposite and is provided with the reflector. Advantage is simple structure, and through the secondary optical design of "refraction + reflection", the problem of traditional T8 LED lamp tube light emission direction concentration, existence dark area, limited beam angle has been solved fundamentally.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, and in particular to a T8 lamp tube. Background Technology

[0002] Currently, most T8 fluorescent tubes on the market employ a method of soldering LED chips onto an aluminum substrate or flexible circuit board, emitting light along the length of the tube to achieve illumination. The light-transmitting outer cover is often made of PC material or a glass tube with a powder-coated or film-coated surface, used for light diffusion and protection of internal components. However, the above-mentioned traditional T8 fluorescent tube structure has significant limitations in practical applications: due to the directional emission characteristics of LED light sources, and the fact that the aluminum substrate or flexible circuit board is usually located on one side of the tube, the light emission direction is relatively concentrated, making it difficult to achieve uniform illumination over a wide area. Therefore, local dark areas easily appear around the circumference of the tube, and the beam angle is limited, failing to achieve omnidirectional illumination. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a T8 lamp tube with a simple structure that can achieve omnidirectional light emission.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A T8 lamp tube includes a light-transmitting tube having a through cavity extending along the axial direction. A lighting source is provided at one end of the through cavity, and the illumination direction of the lighting source is towards the other end of the through cavity. A refractive lens is provided on the lighting source, and a reflector is provided at the other end of the through cavity. The refractive lens and the reflector are positioned opposite each other.

[0005] The light-transmitting tube has a tube connector at each end. The two tube connectors are a first tube connector and a second tube connector. A driving power supply is installed inside the first tube connector. The lighting source is positioned and installed inside the first tube connector and electrically connected to the driving power supply.

[0006] A heat sink is provided inside the first lamp tube connector, and the lighting source is positioned and installed on the heat sink.

[0007] The heat sink is equipped with a power isolation component, and the drive power supply is located inside the power isolation component.

[0008] The second lamp tube connector is provided with a fixed bracket, and the reflector is positioned and installed on the fixed bracket.

[0009] The refractive lens is a hemisphere, the diameter of which is larger than the inner diameter of the light-transmitting tube, and the center of which is located on the central axis of the light-transmitting tube.

[0010] The reflector is a circular disc with an outer diameter that matches the inner diameter of the light-transmitting tube, and the center of the reflector is located on the central axis of the light-transmitting tube.

[0011] Compared with existing technologies, the advantages of this utility model are: simple structure, and through the secondary optical design of "refraction + reflection", it fundamentally solves the problems of concentrated light output direction, dark areas, and limited beam angle of traditional T8 LED tubes. Specifically, it is manifested in: (1) The light source emits light, and the emitted light is evenly irradiated onto the light-transmitting tube and the reflector set on the opposite side through the refracting lens. The excess light is reflected back into the light-transmitting tube through the reflector, and then the light is evenly diffused in a 360° circumference through the refracting lens. This completely eliminates the local dark areas caused by the directional light emission of the light source or the substrate blocking in the traditional structure. The illumination range is wider and the uniformity is extremely high. (2) Almost all the light emitted along the axis is recovered and redistributed by the reflector, avoiding the absorption or loss of light inside the light tube, resulting in higher light efficiency; (3) The light is diffused by the refracting lens and reflected by the reflecting mirror, and then fully mixed twice, resulting in softer light output, effectively reducing glare and significantly improving visual comfort. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 for Figure 2 A magnified structural diagram at point B in the middle. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0014] As shown in the figure, a T8 lamp tube includes a light-transmitting lamp tube 1, which has a through cavity 10 extending along the axial direction. A light source 2 is provided at one end of the through cavity 10, and the illumination direction of the light source 2 is towards the other end of the through cavity 10. A refractive lens 3 is provided on the light source 2, and a reflector 4 is provided at the other end of the through cavity 10. The refractive lens 3 and the reflector 4 are arranged opposite to each other.

[0015] In this specific embodiment, lamp tube 1 has lamp tube connectors at both ends, namely a first lamp tube connector 5 and a second lamp tube connector 6. A driving power supply 7 is housed within the first lamp tube connector 5, and the lighting source 2 is positioned and installed within the first lamp tube connector 5 and electrically connected to the driving power supply 7. By encapsulating the driving power supply 7 and the lighting source 2 within a single lamp holder, the structure is compact, internal wiring is simplified, and the reliability and safety of electrical connections are improved. Simultaneously, it facilitates overall assembly and replacement, forming a highly integrated and modular design.

[0016] In this specific embodiment, a heat sink 60 is provided inside the first lamp tube connector 5, and the lighting source 2 is positioned and installed on the heat sink 60. By providing a heat sink 60, a heat dissipation channel is provided for the lighting source 2, which significantly reduces the operating temperature of the LED chip, thereby effectively preventing light decay and extending the lifespan of the lamp tube.

[0017] In this specific embodiment, a power isolation component 8 is provided inside the heat sink 60, and the drive power supply 7 is disposed inside the power isolation component 8. This achieves thermoelectric separation, improving safety and reliability. The power isolation component 8 isolates the drive power supply 7 from the heat sink 60, thereby protecting the drive power supply 7.

[0018] In this specific embodiment, a fixing bracket 9 is provided inside the second lamp tube connector 6, and the reflector 4 is positioned and mounted on the fixing bracket 9. This ensures the precise positioning and stability of the optical components. The fixing bracket 9 ensures that the reflector 4 is accurately fixed on the central axis of the lamp tube, which is key to achieving a uniform and symmetrical optical path. At the same time, this structure enhances vibration resistance and ensures the long-term stability of the optical effect.

[0019] In this specific embodiment, the refractive lens 3 is a hemisphere, with a diameter larger than the inner diameter of the light-transmitting tube 1, and the center of the refractive lens 3 located on the central axis of the light-transmitting tube 1. The hemisphere shape is ideal for achieving large-angle, uniform light refraction, while placing its center on the central axis ensures the symmetry of the emitted light. The design, with a diameter larger than the inner diameter of the tube, allows it to be fixed at the tube end and effectively control the initial light emission across the entire light-emitting cross-section.

[0020] In this specific embodiment, the reflector 4 is a circular disc with an outer diameter that matches the inner diameter of the light-transmitting tube 1, and the center of the reflector 4 is located on the central axis of the light-transmitting tube 1. This achieves maximum light recovery and precise reflection. The circular reflector 4 fits tightly with the inner diameter of the tube, which can almost completely intercept and reflect all axial light rays, avoiding light leakage from the end and causing loss. Its strict center alignment ensures that the light can return precisely along the original path, which is a crucial part of the optical path design to form uniform omnidirectional light.

[0021] In this specific embodiment, the lighting source 2 is an LED light source.

Claims

1. A T8 lamp tube, comprising a light-transmitting tube, wherein the light-transmitting tube has a through cavity extending along the axial direction, characterized in that... An illumination source is provided at one end of the through cavity, and the illumination direction of the illumination source is towards the other end of the through cavity. A refractive lens is provided on the illumination source, and a reflector is provided at the other end of the through cavity. The refractive lens and the reflector are positioned opposite each other.

2. A T8 lamp tube as described in claim 1, characterized in that... The light-transmitting tube has a tube connector at each end. The two tube connectors are a first tube connector and a second tube connector. A driving power supply is installed inside the first tube connector. The lighting source is positioned and installed inside the first tube connector and electrically connected to the driving power supply.

3. A T8 lamp tube as described in claim 2, characterized in that... A heat sink is provided inside the first lamp tube connector, and the lighting source is positioned and installed on the heat sink.

4. A T8 lamp tube as described in claim 3, characterized in that... The heat sink is equipped with a power isolation component, and the drive power supply is located inside the power isolation component.

5. A T8 lamp tube as described in claim 3, characterized in that... The second lamp tube connector is provided with a fixed bracket, and the reflector is positioned and installed on the fixed bracket.

6. A T8 lamp tube as described in claim 1, characterized in that... The refractive lens is a hemisphere, the diameter of which is larger than the inner diameter of the light-transmitting tube, and the center of which is located on the central axis of the light-transmitting tube.

7. A T8 lamp tube as described in claim 1, characterized in that... The reflector is a circular disc with an outer diameter that matches the inner diameter of the light-transmitting tube, and the center of the reflector is located on the central axis of the light-transmitting tube.

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