Low-position table lamp

Abstract

The utility model relates to the field of lighting equipment, and particularly discloses a low-position table lamp which comprises a lamp holder, a radiator, a light guide plate and a lamp barrel. The lamp holder is arranged at one end of the lamp tube; the lamp holder is provided with a heat dissipation cavity, the radiator is arranged in the heat dissipation cavity, an upper light source installation face is formed on the upper side face of the radiator, and an upper light source is arranged on the upper light source installation face. The light guide plate is horizontally arranged in front of the upper light source; the light guide plate has a first refractive unit and a second refractive unit. The embodiment of the utility model further discloses an installation method of the low-position table lamp. By means of the table lamp, the height of the lamp can be reduced, the national lighting requirement for the table lamp can be met, and the occupied space of the lamp is reduced.

Description

Technical Field

[0001] The utility model relates to a lighting device, in particular to a low-position table lamp. Background Art

[0002] A desk lamp is a common fixture placed on a tabletop to provide localized illumination. Most current desk lamps on the market require additional weights to stabilize them. These are also bulky and tall, reducing portability. The excessively high luminous surface can easily lead to glare and visual fatigue during use, hindering daily use. Therefore, a desk lamp with a low luminous surface is desirable.

[0003] According to the national standard GB / T 9473-2022, "Performance Requirements for Desk Lamps for Reading and Writing Tasks," the uniformity test range for desk lamps is specified. Unless otherwise specified, the vertical projection of the geometric center of the desk lamp's light-emitting surface will coincide with the center of the upper edge of the central rectangle. However, with additional instructions, the vertical projection of the geometric center of the desk lamp's light-emitting surface may be placed outside the central rectangle. If the light-emitting surface is lowered and a more compact straight-tube structure is adopted, illumination of the rear of the lamp and the furthest point of the test surface will be difficult under these conditions, failing to meet the aforementioned national standard requirements. Utility Model Content

[0004] In order to solve the defects of the prior art, the utility model provides a low-position desk lamp, which can meet the national lighting requirements for desk lamps while lowering the height of the lamp and reducing the space occupied by the lamp.

[0005] In order to solve the above technical problems, an embodiment of the utility model provides a low-position desk lamp, comprising a lamp holder, a radiator, a light guide plate and a lamp tube; the lamp holder is arranged at one end of the lamp tube; the lamp holder has a heat dissipation cavity, the radiator is arranged in the heat dissipation cavity, an upper light source mounting surface is formed on the upper side of the radiator, and an upper light source is provided on the upper light source mounting surface; the light guide plate is horizontally arranged in front of the upper light source; the light guide plate has a first refraction unit and a second refraction unit, and the first refraction unit and the second refraction unit can refract the light emitted by the upper light source to different areas of the placement surface of the low-position desk lamp.

[0006] As an improvement to the above solution, a forward-protruding triangular block is provided on the upper portion of the radiator, and the upper light source mounting surface is provided on the side of the triangular block; the bottom of the triangular block extends horizontally outward to form a light shielding plate.

[0007] As an improvement to the above solution, the lamp holder further has an annular limiting portion, and the light guide plate is arranged in the annular limiting portion.

[0008] As an improvement of the above solution, the first refraction unit is a sawtooth-shaped concave structure provided on the surface of the light guide plate; the second refraction unit is an overlapping rice-grain-shaped structure provided on the surface of the light guide plate.

[0009] As an improvement to the above solution, a first light reflecting structure is provided on the inner side of the annular limiting portion, and a second light reflecting structure is provided above the light guide plate.

[0010] As an improvement of the above solution, a fill light source and a reflective bowl are provided at the lower end of the lamp head. The light emitted by the fill light source is reflected by the reflective bowl, passes through the light guide plate, is reflected by the second reflective structure, re-enters the light guide plate, and is scattered by the light guide plate to reach the second area.

[0011] As an improvement to the above solution, the back of the radiator has a heat dissipation plate extending parallel downward, the bottom of the heat dissipation plate has a fill light source installation surface set at a predetermined inclination angle, and the fill light source is set on the fill light source installation surface.

[0012] As an improvement of the above-mentioned solution, the lower part of the lamp head has a fill light cavity, the fill light source and the reflective bowl are arranged in the fill light cavity, the top of the fill light cavity is provided with a fill light hole, the bottom of the fill light hole is provided with a light blocking block, the light blocking block has a light blocking hole, the light blocking hole is connected to the fill light hole, and the diameter of the light blocking hole is larger than the diameter of the fill light hole.

[0013] The implementation of the present invention has the following beneficial effects:

[0014] This solution can reduce the height of the lamp while meeting national lighting requirements for desk lamps, reducing the space occupied by the lamp and improving its portability. By refracting and reflecting light from the upper light source through different refraction units, a uniformly illuminated area can be created on the user's desk, reducing glare and protecting eyesight. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram of the illumination area divided by the utility model according to the national standard "Performance Requirements for Reading and Writing Desk Lamps";

[0016] Figure 2 This is a schematic diagram of the overall structure of a low-position desk lamp according to an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the top structure of a lamp holder according to an embodiment of the present invention;

[0018] Figure 4 This is a cross-sectional view of the lamp holder structure of an embodiment of the present utility model;

[0019] Figure 5This is a light path simulation diagram of a light guide plate according to an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of the lamp holder structure when viewed from above in one embodiment of the utility model;

[0021] Figure 7 This is an assembly diagram of a radiator, an upper light source, and a fill light source according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that any directional terms such as "up," "down," "left," "right," "front," "back," "inside," and "outside" that appear or will appear in this document are based solely on the accompanying drawings and are not intended to limit the present invention.

[0023] like Figure 1 As shown, the present invention divides the lamp's illumination range into different areas, based on the uniformity test range specified in the national standard document GB / T 9473-2022, "Performance Requirements for Reading and Writing Desk Lamps." These areas include a first area 100 located at the front periphery, a second area 200 located in the center, and a third area 300 located at the rear. During normal use, the third area 300 is located directly below and behind the lamp, the second area 200 is located in front of and adjacent to the third area 300, and the first area 100 is located in front of and adjacent to the second area 200.

[0024] Combine Figure 2-Figure 4 As shown, a specific embodiment of the present invention provides a low-position desk lamp, comprising a lamp holder 1, a radiator 2, a light guide plate 3 and a lamp tube 4; the lamp holder 1 is arranged at one end of the lamp tube 4; the lamp holder 1 has a heat dissipation cavity 11, the radiator 2 is arranged in the heat dissipation cavity 11, an upper light source mounting surface 21 is formed on the upper side surface of the radiator 2, and an upper light source 5 is provided on the upper light source mounting surface 21; the light guide plate 3 is horizontally arranged in front of the upper light source 5; the light guide plate 3 has a first refraction unit 31 and a second refraction unit 32, and the first refraction unit 31 and the second refraction unit 32 can refract the light emitted by the upper light source 5 to different areas of the placement surface of the low-position desk lamp.

[0025] The above solution can reduce the height of the lamp while meeting national lighting requirements for desk lamps, reducing the space occupied by the lamp and improving its portability. By refracting and reflecting the light emitted by the upper light source 5 through different refraction units, a uniformly illuminated area can be formed on the user's desk, reducing glare and protecting eyesight.

[0026] In one embodiment of the present invention, a forward-projecting triangular block 22 is provided on the upper portion of the heat sink 2, and the upper light source mounting surface 21 is provided on the side of the triangular block 22. The bottom of the triangular block 22 extends horizontally outward to form a light shield 23. The triangular block 22 forms a V-shaped side surface, allowing the light source fixed to the side surface to emit light into the light guide plate 3 in a horizontally symmetrical manner, resulting in more uniform output light. The light shield 23 completely covers the bottom of the upper light source 5, preventing light from the upper light source 5 from being emitted directly downward, thereby preventing light leakage.

[0027] In order to facilitate the installation of the light guide plate 3 , the lamp holder 1 further has an annular limiting portion 12 , and the light guide plate 3 is arranged in the annular limiting portion 12 .

[0028] like Figure 5 As shown, in one embodiment of the present invention, the first refractive element 31 is a sawtooth-shaped recessed structure 311 provided on the surface of the light guide plate 3; the second refractive element 32 is an overlapping rice-grain-shaped structure 321 provided on the surface of the light guide plate 3. A first reflective structure 13 is provided on the inner side of the annular retaining portion 12, and a second reflective structure 14 is provided above the light guide plate 3. Since the LED light source is a Lambertian illuminator, emitting light at a 120-degree angle, light at different angles passes through different microstructure surfaces. The lens design optimizes the depths between the different microstructures, allowing light to pass through three different polarization structures within the lens, resulting in three exiting portions. The first portion has the shallowest microstructure depth. When incident light, a portion passes through the sawtooth-shaped recesses, undergoing a primary deflection. The second portion of the polarization structure consists of overlapping rice-grain-shaped recesses, which account for the majority of the structure and are primarily responsible for deflecting the light toward a larger central area. The third portion of the polarization is primarily directed by the first reflective structure 13 at the edge, reflecting the light behind the lamp.

[0029] Specifically, after the light emitted by the upper light source 5 enters the light guide plate 3, it is refracted by the sawtooth-shaped concave structure and then emitted downward to reach the first area, that is, the working surface at 400mm-500mm in the figure. Preferably, the concave structure is arranged parallel to the V-shaped incident surface and is arranged symmetrically in the trapezoidal area outside the V-shaped incident surface. Through the design of the above-mentioned arrangement position and arrangement shape, the light can be concentrated on the working surface outside the second area, surrounding the second area, to prevent excessive outward diffusion of light and affecting the brightness of the second area. The second refractive unit 32 is formed by overlapping rice-shaped curved concave structures. After the light emitted by the upper light source 5 enters the light guide plate 3, it is refracted by the overlapping rice-shaped structure and then emitted downward to reach the second area; after part of the light leaves the overlapping rice-shaped structure upward, it is reflected by the second reflective structure 14 and enters the overlapping rice-shaped structure, and is refracted again to reach the second area, concentrating the light in the 100mm-400mm area of the working surface. By using the second refraction unit 32 in conjunction with the second light reflecting structure 14 , more light can be concentrated in the main working area of 100 mm to 400 mm, providing the user with lighting of sufficient brightness.

[0030] like Figure 6 and Figure 7 As shown, in one embodiment of the present invention, a fill light source 6 and a reflective bowl 7 are provided at the lower end of the lamp head 1. The light emitted by the fill light source 6 is reflected by the reflective bowl 7, passes through the light guide plate 3, is reflected by the second reflective structure 14, and re-enters the light guide plate 3, and is scattered by the light guide plate 3 to reach the second area.

[0031] It should be noted that the 100-400mm range represents the central testing area, which is also the primary operating area of the desk lamp. Therefore, the requirements for illumination and uniformity in this area are more stringent. The light guide plate 3 splits the light emitted by the upper light source 5 into three parts, reducing the illumination reaching the central area. Therefore, a fill light module is required to provide additional light. When the fill light source 6 emits light, the light is initially reflected upward by the reflective bowl 7 to the second reflective structure 14 of the lamp head 1. It then undergoes a second reflection on the reflective paper. The downwardly reflected light is diffused by the microstructure on the surface of the light guide plate 3 and then illuminates the central area 100-400mm, improving the illumination of the primary working surface.

[0032] Preferably, the back of the radiator 2 has a heat dissipation plate 24 extending parallel to and downwardly, and the bottom of the heat dissipation plate 24 has a fill light source mounting surface 241 set at a predetermined inclination angle, and the fill light source 6 is arranged on the fill light source mounting surface 241. By designing a special-shaped radiator 2, the heat dissipation requirements of the upper light source 5 and the fill light source 6 can be met through an integrated structure. By utilizing the channel connecting the upper light source 5 and the fill light source 6, the heat dissipation space is increased, the heat dissipation efficiency is improved, and the volume of the desk lamp is reduced. The lower part of the lamp head 1 has a fill light cavity 15, and the fill light source 6 and the reflective bowl 7 are arranged in the fill light cavity 15. The top of the fill light cavity 15 is provided with a fill light hole 16, and the bottom of the fill light hole 16 is provided with a light blocking block 8. The light blocking block 8 has a light blocking hole 81, and the light blocking hole 81 is connected to the fill light hole 16, and the diameter of the light blocking hole 81 is larger than the diameter of the fill light hole 16. The light blocking block 8 has a certain thickness. The light emitted from the fill light source 6 enters the light blocking hole 81 and then passes through the fill light hole 16 into the light guide plate 3, thereby preventing the light generated by the fill light source 6 from being directly emitted obliquely upward from the fill light hole 16 and entering the user's eyes to cause glare.

[0033] Accordingly, the embodiment of the present invention further provides a method for installing a low-position desk lamp, comprising the following steps:

[0034] S1. Install the upper light source 5 on the upper light source mounting surface 21 of the radiator 2, and then insert the radiator 2 into the heat dissipation cavity 11 of the lamp holder 1 from above;

[0035] S2. Paste reflective paper on the inner side of the annular limiting portion 12 of the lamp holder 1 to form a first reflective structure 13; install the light guide plate 3 into the annular limiting portion 12, and then install the top cover with reflective paper on the bottom surface on the top of the lamp holder 1 to form a second reflective structure 14;

[0036] S3, install the light blocking block 8 below the light filling hole 16 of the lamp holder 1;

[0037] S4 , fixing the fill light source 6 on the fill light source mounting surface 241 of the heat sink 2 , and then installing the reflective bowl 7 below the fill light source 6 .

[0038] S5, install the battery, power drive element and switch into the lamp tube 4;

[0039] S6. Install the lamp holder 1 on the lamp tube 4.

[0040] This method uses the radiator 2 as the installation core, arranges the upper light source 5 and the corresponding light processing structure on the upper part of the lamp head 1, then arranges the fill light source 6 and the corresponding light processing structure on the lower part of the lamp head 1, and finally assembles the lamp tube 4. The assembly is clear and efficient, and the assembly structure is firm and reliable.

[0041] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A low-position desk lamp, characterized in that: Including lamp holder, radiator, light guide plate and lamp tube; The lamp holder is arranged at one end of the lamp tube; The lamp holder has a heat dissipation cavity, the radiator is arranged in the heat dissipation cavity, an upper light source mounting surface is formed on the upper side of the radiator, and an upper light source is arranged on the upper light source mounting surface; The light guide plate is horizontally arranged in front of the upper light source; The light guide plate has a first refraction unit and a second refraction unit.

2. The low-position desk lamp according to claim 1, characterized in that: A triangular block protruding forward is provided on the upper portion of the radiator, and the upper light source mounting surface is provided on the side surface of the triangular block; the bottom of the triangular block extends outward horizontally to form a light shielding plate.

3. The low-position desk lamp according to claim 1, characterized in that: The lamp holder also has an annular limiting portion, and the light guide plate is arranged in the annular limiting portion.

4. The low-position desk lamp according to claim 1, characterized in that: The first refraction unit is a sawtooth-shaped concave structure provided on the surface of the light guide plate; the second refraction unit is an overlapping rice-grain-shaped structure provided on the surface of the light guide plate.

5. The low-position desk lamp according to claim 3, characterized in that: A first light reflecting structure is provided on the inner side of the annular limiting portion, and a second light reflecting structure is provided above the light guide plate.

6. The low-position desk lamp according to claim 5, characterized in that: A fill light source and a reflective bowl are provided at the lower end of the lamp head. The light emitted by the fill light source is reflected by the reflective bowl, passes through the light guide plate, re-enters the light guide plate after being reflected by the second reflective structure, and reaches the irradiated surface after being scattered by the light guide plate.

7. The low-position desk lamp according to claim 6, characterized in that: The back of the radiator is provided with a heat dissipation plate extending parallel to and downwards, the bottom of the heat dissipation plate is provided with a fill light source installation surface arranged at a predetermined inclination angle, and the fill light source is arranged on the fill light source installation surface.

8. The low-position desk lamp according to claim 7, characterized in that: The lower part of the lamp head is provided with a fill light cavity, the fill light source and the reflective bowl are arranged in the fill light cavity, the top of the fill light cavity is provided with a fill light hole, the bottom of the fill light hole is provided with a light blocking block, the light blocking block has a light blocking hole, the light blocking hole is connected to the fill light hole, and the diameter of the light blocking hole is larger than the diameter of the fill light hole.

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