Lamp tube

Abstract

The utility model provides a lamp tube which comprises a lamp tube body, the lamp tube body is integrally formed through double-color extrusion molding, and the lamp tube body comprises an upper half non-transparent part and a lower half light-transmitting part. The non-transparent part is provided with a light bar, and the light-emitting surface of the light bar faces the light-transmitting part; diffusion powder is added to the light-transmitting part in the double-color extrusion molding process; the light-transmitting part comprises a main light-emitting area and a semi-matte area; the main light-emitting area is arranged right below the light-emitting surface; the semi-foggy surface areas are arranged on the two sides of the main light-emitting area; a micro-tooth structure is arranged on the side wall of the semi-matte area; the problem that an existing fluorescent lamp cannot achieve beam angle adjustment is solved, beam shaping is achieved, and beams are concentrated under a lamp tube.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fluorescent tube, especially a fluorescent tube. BACKGROUND

[0002] The fluorescent tube belongs to a light source for large area lighting, and is mainly applied to the lighting device of public places such as factories, schools, offices, shopping malls and families. The traditional fluorescent lamp is mainly a fluorescent lamp, and its internal working principle is that light sources are generated by electronic emission ionization excitation of fluorescence. Compared with the traditional fluorescent lamp, the internal light source of the current fluorescent tube is an LED lamp bead, and the light emitting efficiency is higher, and the lamp bead life is longer. Especially in the factory range, the application of the fluorescent tube is very wide. Through the cooperation of the lamp tubes, the number and efficiency of the row lamps can be optimally utilized. However, for the current fluorescent tube with LED inside, the inner wall of the lamp tube has no optical microstructure, and cannot play the role of beam shaping and focusing, so the beam angle adjustment cannot be realized. In addition, the minimum beam angle of the ordinary fluorescent tube is greater than 120 degrees, and the maximum illuminance of the lamp tube irradiated on the ground directly below cannot be improved. SUMMARY

[0003] The utility model aims at solving the problem that the current fluorescent lamp cannot realize beam angle adjustment, and provides a lamp tube to realize beam shaping and make the light beam concentrated on the directly below the lamp tube.

[0004] In order to solve the above technical problems, the utility model provides a lamp tube, which comprises a lamp tube body, the lamp tube body is integrally formed by double-color extrusion, the lamp tube body comprises an upper half non-transparent part and a lower half light-transmitting part;

[0005] The non-transparent part is installed with a lamp strip, the light emitting surface of the lamp strip faces the light-transmitting part, and diffusion powder is added in the light-transmitting part during double-color extrusion.

[0006] The light-transmitting part comprises a main light emitting area and a half-frosted area, the main light emitting area is arranged directly below the light emitting surface, and the half-frosted area is arranged on both sides of the main light emitting area, and a micro-tooth structure is arranged on the side wall of the half-frosted area.

[0007] In a preferred embodiment, the non-transparent part is made of non-transparent PC / ABS material, the light-transmitting part is made of transparent PC material mixed with diffusion powder, the proportion of the diffusion powder in the light-transmitting part is increased, and the light distribution angle of the light-transmitting part is increased.

[0008] In a preferred embodiment, the light distribution angle of the light-transmitting part is set in the range of 75°-180°.

[0009] In a preferred embodiment, the non-transparent part is a rear shell, the inner wall of the rear shell is a high-reflective smooth white paint surface; the lamp strip is installed inside the rear shell, and the lamp strip comprises a PCB and a SMD LED.

[0010] In a preferred embodiment, the inner wall of the two sides of the rear shell for connecting the semi-matt area is provided with a reflective curved surface.

[0011] In a preferred embodiment, the included angle formed by the connecting position of the two sides of the main light-emitting area and the light-emitting center of the lamp bead on the lamp strip is θ, the connecting position is the position where the main light-emitting area is connected with the semi-matt area; the angle of the included angle θ is set to 30°≤θ≤90°.

[0012] In a preferred embodiment, the micro-tooth structure is a sawtooth structure, and the micro-tooth structures of the two sides of the semi-matt area are mirror-symmetrically arranged.

[0013] In a preferred embodiment, the micro-tooth structure is composed of a plurality of sawtooth units, and the included angle of the incident edges of two adjacent sawtooth units is θ n , and the angle of the included angle θ n is set to 5°≤θ n ≤10°.

[0014] In a preferred embodiment, the included angle of the incident edge of the sawtooth unit and the side wall of the semi-matt area is α1, and the angle of the included angle α1 is set to 15°≤α1≤60°.

[0015] In a preferred embodiment, the incident edges of two adjacent sawtooth units are connected by a side edge; the included angle of the incident edge of a single sawtooth unit and the side edge is α2, and the angle of the included angle α2 is set to 85°≤α2≤95°.

[0016] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

[0017] 1. A double-color extrusion integrated lamp tube is provided, the upper half of the lamp tube is a non-transparent part, the lower half is a light-transmitting part, and a micro-tooth structure is arranged on the two side walls of the light-transmitting part, the micro-tooth structure mainly functions as beam shaping, and the micro-tooth structure plays a role of converging the beam angle (light distribution angle), so that the light beam is concentrated in the main light-emitting area as much as possible.

[0018] 2. Diffusion powder is added in the light-transmitting part during the double-color extrusion process, the diffusion powder is mainly used for adjusting the haze and transparency of the light-transmitting part, and different proportions of the diffusion powder determine different light distribution angles of the lamp tube, which can adapt to different light distribution scenes.

[0019] 3. In the light transmission part, a small amount of diffusion powder is added, and the minimum light distribution angle of the lamp tube can reach about 75°, and with the increase of the diffusion powder, the light distribution angle of the lamp tube can reach a maximum of 180°. Therefore, by adjusting the proportion of the diffusion powder, the average beam angle of the shaped lamp tube can be adjusted in the range of 75°-180°. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the lamp tube and the light bar in the preferred embodiment of the utility model;

[0021] Figure 2 It is a cross-sectional view of the double-color extruded lamp tube in the preferred embodiment of the utility model;

[0022] Figure 3 It is an enlarged view of the two-side micro-tooth structure of the double-color extruded lamp tube in the preferred embodiment of the utility model;

[0023] Figure 4 It is an enlarged view of the one-side micro-tooth structure and the sawtooth unit in the preferred embodiment of the utility model;

[0024] Figure 5 It is a whole structure diagram of the lamp tube in the preferred embodiment of the utility model;

[0025] Figure 6 It is a light distribution curve corresponding to the diffusion powder proportion of 0.2 / 10000 of the transparent part of the lamp tube in the preferred embodiment of the utility model;

[0026] Figure 7 It is a light distribution curve corresponding to the diffusion powder proportion of 0.5 / 10000 of the transparent part of the lamp tube in the preferred embodiment of the utility model;

[0027] Figure 8 It is a light distribution curve corresponding to the diffusion powder proportion of 1 / 10000 of the transparent part of the lamp tube in the preferred embodiment of the utility model;

[0028] Figure 9 It is a light distribution curve corresponding to the diffusion powder proportion of 2 / 10000 of the transparent part of the lamp tube in the preferred embodiment of the utility model;

[0029] Figure 10 It is a light distribution curve corresponding to the diffusion powder proportion of 3 / 10000 of the transparent part of the lamp tube in the preferred embodiment of the utility model.

[0030] The reference signs are explained as follows: 1, light bar; 11, PCB; 12, SMD LED; 2, lamp tube; 21, left half-matt surface area; 22, main light-emitting area; 23, right half-matt surface area; 24, rear shell; 241, left side reflecting arc surface; 242, right side reflecting arc surface; 3, lamp tube center normal line (virtual line). DETAILED DESCRIPTION

[0031] Clearly and completely describe the technical scheme in the embodiments of the utility model in combination with the drawings in the embodiments of the utility model; Obviously, the described embodiments are only a part of the embodiments of the utility model, and not all the embodiments, based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of the utility model protection.

[0032] In the description of the utility model, it needs to be explained that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the utility model, it needs to be explained that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be wall-mounted connection, can be detachable connection, or integrally connected, can be mechanical connection, can be electrical connection, can be directly connected, can be indirectly connected through an intermediate medium, can be the communication between two elements, for the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] As Figure 1 , the embodiment provides a lamp tube, which comprises a lamp tube 2 body, the lamp tube 2 body is integrally formed by double-color extrusion, and the length of the lamp tube 2 can be customized. The lamp tube 2 body comprises an upper half non-transparent part and a lower half light-transmitting part.

[0035] The upper half non-transparent part is made of non-transparent PC / ABS material, the non-transparent part is a rear shell 24, the inner wall of the rear shell 24 is a high-reflective smooth white paint surface, a lamp strip 1 is installed in the rear shell 24, the light-emitting surface of the lamp strip 1 faces the light-transmitting part, and the lamp strip 1 comprises a PCB 11 and a patch LED 12 (as Figure 1 ).

[0036] The lower half light-transmitting part is made of transparent PC material, diffusion powder is added in the double-color extrusion process, the light-transmitting part becomes foggy or translucent, can shield lamp beads and components, and plays a role of beautifying the lamp (as Figure 5). In the double-color injection molding process, the addition of diffusion powder can play a role in making the lamp 2 into a frosted surface. Using transparent PC material, diffusion powder mixture, the proportion of diffusion powder in the light transmission part is increased, and the light distribution angle of the light transmission part is increased. When the diffusion powder adjusts the frosted surface of the light transmission part, different diffusion powder proportions determine different light distribution angles of the lamp 2, which can adapt to different light distribution scenes.

[0037] The light transmission part includes a main light emitting area 22 and a semi-frosted surface area; the main light emitting area 22 is arranged directly below the light emitting surface; the semi-frosted surface area is divided into a left semi-frosted surface area 21 and a right semi-frosted surface area 23 on both sides of the main light emitting area 22, and a micro-tooth structure is arranged on the side wall of the left semi-frosted surface area 21 and the right semi-frosted surface area 23. The main function of the micro-tooth structure is beam shaping, so that the light beam is concentrated as much as possible directly below the lamp 2.

[0038] The left semi-frosted surface area 21 and the right semi-frosted surface area 23 are respectively connected with the main light emitting area 22 and the upper half non-transparent part, and the inner wall of the non-transparent rear shell 24 on both sides for connecting the semi-frosted surface area is provided with a reflection arc surface, which mainly plays a role of reflection and light collection. The reflection arc surfaces corresponding to the left semi-frosted surface area 21 and the right semi-frosted surface area 23 are set as a left reflection arc surface 241 and a right reflection arc surface 242 (as shown in Figure 2 )

[0039] As shown in Figure 2 , the included angle formed by the connecting position on both sides of the main light emitting area 22 and the light emitting center of the lamp bead on the lamp strip 1 is θ, the connecting position is the position where the main light emitting area 22 is connected with the semi-frosted surface area, and the angle of the included angle θ is set to 30°≤θ≤90°. The semi-frosted surface areas arranged on both sides of the main light emitting area 22 are symmetrical along the center normal (virtual line) 3 of the lamp, and the micro-tooth structures arranged on the semi-frosted surface areas are mirror-symmetrically arranged along the normal (as shown in Figure 3 ).

[0040] In this embodiment, the micro-tooth structure arranged on the inner wall of the light transmission part of the lamp 2 plays a role of aggregating the beam angle (light distribution angle). In the injection molding process, by adding a small amount of diffusion powder, the minimum light distribution angle of the lamp 2 can reach about 75°, and with the increase of the diffusion powder, the light distribution angle of the lamp 2 can reach a maximum of 180°. Therefore, by adjusting the proportion of the diffusion powder, the average beam angle of the formed lamp 2 can be adjusted in the range of 75°-180°. In order to ensure the uniformity of the overall ground or work surface, the illuminance and uniformity should be considered when the lamps are arranged. Based on the same input luminous flux, when the average beam angle is small, the maximum illuminance below the lamp 2 is larger, and the lamps can be arranged more densely; based on the same input luminous flux, when the average beam angle is large, the maximum illuminance below the lamp 2 is smaller, and the lamps can be arranged more sparsely.

[0041] In the injection molding production process, the light-transmitting part is accompanied by the addition of diffusion powder, which increases the haze of the light-emitting surface of the lamp tube 2. The haze of the lamp tube 2 can have two effects: the first effect is to block the lamp beads, and the second effect is to change the light distribution angle (beam angle). The higher the proportion of the diffusion powder, the higher the haze of the lamp tube 2, and the larger the light distribution angle of the lamp tube 2. In the present embodiment, the plane in which the cross-sectional view of the lamp tube 2 is located is the C0° / 180° plane (as shown in FIG. 1), and the plane perpendicular to the cross section of the lamp tube 2 (C0° / 180° plane) and passing through the normal is the C90° / 270° plane. Figure 1

[0042] As shown in Figure 4 , the micro-tooth structure is a sawtooth structure, which mainly plays a role in beam shaping. The micro-tooth structure is composed of a plurality of sawtooth units. The included angle between the incident edges of two adjacent sawtooth units is θ n . For example, the included angle between the incident edges of the first and second sawtooth units is θ1, the included angle between the incident edges of the second and third sawtooth units is θ2, the included angle between the incident edges of the third and fourth sawtooth units is θ3, the included angle between the incident edges of the fourth and fifth sawtooth units is θ4, the included angle between the incident edges of the fifth and sixth sawtooth units is θ5, the included angle between the incident edges of the (n-1)th and nth sawtooth units is θ n-1 , and the included angle between the incident edges of the nth and (n+1)th sawtooth units is θ n . The angle setting requirements for the incident edge included angles θ1-θ n are 5°≤θ n ≤10° (n≥1).

[0043] As shown in Figure 4 , taking a local sawtooth unit as an example. The incident light is I1, the incident light is I2, and the emergent light is I3. Without the addition of diffusion powder, the incidence and refraction of the lens satisfy the refraction law. According to the refraction law, when light is emitted from a less dense medium into a denser medium, the light will be deflected. The side wall of the half-fogging area is S1, the incident edge of the sawtooth unit is L1, and the side edge of the sawtooth unit is T1, which is the lower side edge connecting two adjacent sawtooth units. O1 is the normal of the incident edge, and O2 is the normal of the emergent edge. The included angle between the incident edge of the sawtooth unit and the side wall of the half-fogging area is α1, and the included angle between the incident edge of the sawtooth unit and the side edge is α2. In order to ensure that the emergent light I3 is deflected and contracted in the normal direction, so as to narrow the light distribution curve of the sawtooth part on the C0° / 180° plane. Therefore, the angle setting requirement for the included angle α1 is 15°≤α1≤60°. In order to ensure that the light emitted by the lamp beads is incident on the incident edge as much as possible, the angle setting requirement for the included angle α2 is 85°≤α2≤95°.

[0044] The proportion of the diffusion powder and the adjustment of the light distribution curve are as follows:

[0045] As​Figure 6 When the ratio of diffusion powder (diffusion powder / transparent PC material) is 0.2 / 10000, the light distribution angle is 119°(C0° / 180°) x 77°(C90° / 270°).

[0046] As Figure 7 When the ratio of diffusion powder (diffusion powder / transparent PC material) is 0.5 / 10000, the light distribution angle is 103°(C0° / 180°) x 79°(C90° / 270°).

[0047] As Figure 8 When the ratio of diffusion powder (diffusion powder / transparent PC material) is 1 / 10000, the light distribution angle is 98°(C0° / 180°) x 93°(C90° / 270°).

[0048] As Figure 9 When the ratio of diffusion powder (diffusion powder / transparent PC material) is 2 / 10000, the light distribution angle is 113°(C0° / 180°) x 146°(C90° / 270°).

[0049] As Figure 10 When the ratio of diffusion powder (diffusion powder / transparent PC material) is 3 / 10000, the light distribution angle is 114°(C0° / 180°) x 157°(C90° / 270°).

[0050] As shown in Table 1 below, the simulation results corresponding to different diffusion powders are listed. As can be seen from Table 1, with the increase of the ratio of diffusion powder, the beam angle in the C90° / 270° plane gradually increases, and the central maximum illumination at the 1m receiving surface gradually decreases. When considering the priority of illumination, in order to select a larger lower illumination, the scheme of 119° x 77° is more suitable; when the illumination requirement is not high and the lamp tube 2 with a larger illumination range is selected, the scheme of 114° x 157° is more suitable.

[0051] Therefore, based on the double-color extruded lamp tube 2 with a micro-tooth structure, different diffusion powder ratios determine different beam angles, which can be applied to different scenes.

[0052] Table 1 Simulation results of different diffusion agent ratios

[0053]

[0054] In addition, by Figure 9 and 10It can be seen that when the ratio of the diffusion powder and the PC is greater than 2 / 10000, a small part of the light of the lamp tube 2 hits the back of the main light-emitting surface of the lamp tube 2, which means that the lamp tube 2 becomes an up-and-down light-emitting lamp tube 2. When the lamp tube 2 is hung and installed, the main light-emitting surface is illuminated to the bottom surface, and the light of the back will hit the ceiling, thereby creating a better atmosphere of space lighting.

[0055] The above merely describes a preferred specific embodiment of the present application, but the design concept of the present application is not limited thereto, and any person skilled in the art can make non-essential changes to the present application within the technical range disclosed by the present application, and such changes shall be deemed to fall within the protection scope of the present application.

Claims

1. A lamp characterized by: The lamp tube body is integrally formed by double-color extrusion, and comprises an upper half non-transparent part and a lower half light-transmitting part; The non-transparent part is provided with a lamp strip, and the light-emitting surface of the lamp strip faces the light-transmitting part; the light-transmitting part is added with diffusion powder during the double-color extrusion process; The light-transmitting part comprises a main light-emitting area and a semi-frosted area; the main light-emitting area is arranged directly below the light-emitting surface; the semi-frosted area is arranged on both sides of the main light-emitting area; a micro-tooth structure is arranged on the side wall of the semi-frosted area.

2. A lamp as claimed in claim 1, characterized in that: The non-transparent part is made of non-transparent PC / ABS material; the light-transmitting part is made of transparent PC material mixed with diffusion powder; the proportion of the diffusion powder in the light-transmitting part is increased, and the light distribution angle of the light-transmitting part is increased.

3. A lamp as claimed in claim 2, characterized in that: The light distribution angle of the light-transmitting part is set to be in the range of 75°-180°.

4. A lamp as claimed in claim 2, characterized in that: The non-transparent part is a rear shell, and the inner wall of the rear shell is a high-reflective smooth white paint surface; the lamp strip is arranged inside the rear shell, and the lamp strip comprises a PCB and a patch LED.

5. A lamp as claimed in claim 4, characterized in that: The inner wall of the rear shell on both sides for connecting the semi-frosted area is provided with a reflective arc surface.

6. A lamp as claimed in claim 1, characterized in that: The included angle formed by the connecting position on both sides of the main light-emitting area and the light-emitting center of the lamp bead on the lamp strip is θ, the connecting position is the position where the main light-emitting area is connected with the semi-frosted area; the angle of the included angle θ is set to be in the range of 30°≤θ≤90°.

7. A lamp as claimed in claim 1, characterized in that: The micro-tooth structure is a sawtooth structure, and the micro-tooth structures on both sides of the semi-frosted area are mirror-symmetrically arranged.

8. A lamp as claimed in claim 7, characterized in that: The microtooth structure is composed of multiple sawtooth units, the included angle of the incident edges of two adjacent sawtooth units is θ n , and the angle of the included angle θ n is set to 5°≤θ n ≤10°.

9. A lamp as claimed in claim 8, characterized in that: The included angle between the incident edge of the sawtooth unit and the side wall of the semi-frosted area is α1, and the angle of the included angle α1 is set to be in the range of 15°≤α1≤60°.

10. A lamp as claimed in claim 9, characterized in that: The incident edges of adjacent two sawtooth units are connected through a side edge; the included angle α2 between the incident edge of a single sawtooth unit and the side edge is set to be in the range of 85°≤α2≤95°.

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