TW201307719A - Table lamp - Google Patents

Abstract

A table lamp including a base, a bracket module, a front cover, a heat dissipating plate and a light emitting module is provided. The bracket module is assembled to the base. The front cover is assembled to the bracket module and has an opening. The heat dissipating plate is assembled to front cover. The light emitting module is fixed between the heat dissipating plate and the front cover. Light provided from the light emitting module emits out from the opening.

Description

table lamp

The present invention relates to a table lamp, and more particularly to a table lamp that is easy to assemble and small in size.

In daily life, people often use table lamps to reinforce areas with weak indoor light. Therefore, for example, a light-supplied area such as a desk or a desk has a brighter working environment, and the user can read or perform other work on a desk or a desk without worrying about insufficient light in the work environment. Visual deterioration.

Conventional desk lamps use fluorescent lamps as the light source, but the fluorescent lamps consume a large amount of electricity and use alternating current to generate high electromagnetic wave energy. In addition, the heat generated by the fluorescent lamp during operation is extremely high and it is easy to burn. In order to solve the problem of flickering of fluorescent lamps, a high-cost electronic ballast is also required. The brightness of the fluorescent lamp cannot be adjusted, only the on or off can be selected. Fluorescent lamps also have the disadvantages of low color rendering, unadjustable color temperature, mercury content, fragile glass casing and short service life.

In general, since the light emitting diode (LED) light source has the advantages of small size and long service life, the use of the light-emitting diode table lamp is becoming more and more popular. FIG. 1 is a schematic view showing a conventional light-emitting diode table lamp. Referring to FIG. 1, the LED lamp 100 is a plurality of LEDs as the illumination source 110, and the light emitted by the LED is directly irradiated into the working environment or the reading environment. However, since the light emitted from the light source 110 of the light-emitting diode lamp 100 is directly emitted outside the globe 120, the desk lamp 100 is likely to have an excessively high brightness. In this way, when the user is reading or working, the light directly from the LED to the working environment will enter the eyes of the user in a large amount, causing the user's eyes to be uncomfortable. In addition, the conventional light-emitting diode lamp is equipped with an optical plate to improve the uniformity of the light source, and the light-emitting diode and the optical plate are first assembled into a single module and then installed in the outer casing. The modular design not only increases the overall thickness, but also increases component count and assembly cost.

The invention provides a table lamp, which can solve the problems of excessive volume and complicated assembly.

The invention provides a table lamp, comprising a base, a bracket module, a front cover, a heat dissipation plate and a lighting module. The bracket module is assembled to the base. The front cover is assembled to the bracket module and has an opening. The heat sink is assembled to the front cover. The light emitting module is fixed between the heat sink and the front cover. The light provided by the light module is emitted by the opening.

In an embodiment of the invention, the light emitting module includes a light guide plate, a circuit board, and a plurality of light emitting diodes. The light guide plate has a connected light incident side and a light exiting surface. The light exit surface faces the opening. The board is placed next to the light entrance side. The light emitting diode is disposed on the circuit board and electrically connected to the circuit board, and the light emitting diode is located between the circuit board and the light incident side. In addition, the light emitting module may further include a reflective sheet disposed between the heat dissipation plate and the light guide plate. In addition, the light emitting module may further include an optical film disposed between the front cover and the light guide plate. Moreover, the light emitting module can further include a power control board disposed on the front cover and electrically connected to the circuit board.

In an embodiment of the invention, the desk lamp further includes an upper cover that is assembled to the front cover. The heat dissipation plate and the light emitting module are located between the upper cover and the front cover.

In an embodiment of the invention, the bracket module includes a first rotating shaft, a bracket, and a second rotating shaft. The first shaft is disposed on the base. One end of the bracket is pivotally connected to the first rotating shaft. Both ends of the second rotating shaft are respectively pivoted to the other end of the bracket and the front cover.

In an embodiment of the invention, the heat sink is a metal plate.

Based on the above, in the table lamp of the present invention, the heat-emitting panel and the front cover are used together to fix the light-emitting module, which can reduce the number of components and reduce the overall thickness.

The above described features and advantages of the present invention will be more apparent from the following description.

2 is an exploded view of a desk lamp according to an embodiment of the present invention, and FIG. 3 is a partial perspective view of the desk lamp of FIG. 2. Referring to FIG. 2 and FIG. 3 , the desk lamp 200 of the present embodiment includes a base 210 , a bracket module 220 , a front cover 230 , a heat dissipation plate 240 , and a lighting module 250 . The base 220 is used to secure the desk lamp 200 to a table top or other location. The bracket module 220 is assembled to the base 220. The bracket module 220 is used to connect the base 220 and other components of the desk lamp 200. In some embodiments, the bracket module 220 can also adjust the angle and height to provide proper orientation illumination. The front cover 230 is assembled to the bracket module 220 and has an opening 232. The light provided by the light module 250 is emitted by the opening 232. On the other hand, the opening 232 can also cover the light-transmissive plate (not shown), and the illumination can also be achieved.

The heat sink 240 is assembled to the front cover 230 to facilitate the fixing of the light module 250 between the heat sink 240 and the front cover 230. In other words, the table lamp 200 of the present embodiment does not use a modular light source as in the conventional table lamp, thereby avoiding the use of a multi-layered casing to simplify the assembly process and reducing the cost and overall volume.

For example, the heat dissipation plate 240 of the present embodiment has four screw holes 242, and the front cover 230 also has four screw holes 234 corresponding to the screw holes 242. Therefore, four screws can be used to secure the screw holes 242 through the screw holes 234 to fix the heat dissipation plate 240 to the front cover 230. Of course, the heat sink 240 can also be fixed to the front cover 230 by a latch or other mechanism, and the present invention does not limit the related changes.

The light emitting module 250 of the embodiment includes a light guide plate 252, a circuit board 254, and a plurality of light emitting diodes 256. The light guide plate 252 has a light incident side 252A and a light exit surface 252B. The light exit surface 252B faces the opening 232. The circuit board 254 is disposed beside the light incident side 252A. The light emitting diode 256 is disposed on the circuit board 254 and electrically connected to the circuit board 254, and the light emitting diode 256 is located between the circuit board 254 and the light incident side 252A. The light provided by the LED 256 enters the light guide plate 252 from the light incident side 252A, and is conducted from the light exit surface 252B after being conducted in the light guide plate 252. In order to improve the uniformity of the light source, the surface of the light guide plate 252 may be designed with a microstructure so that the light is led out at an appropriate position.

Since the light provided by the light-emitting diode 256 is not directly irradiated to the working environment, it is possible to avoid excessive brightness and cause eye fatigue of the user. In addition, the light-emitting diode 256 has low power consumption, low electromagnetic wave energy, no flickering problem, no need to use an electronic ballast, adjustable brightness, high color rendering, adjustable color temperature, no mercury, and the package material is not easily broken and used. Many advantages such as long life. In addition, since the heat dissipation plate 240 can effectively dissipate the light-emitting diode 256, the service life of the light-emitting diode 256 can be further extended, and the possibility of scalding the user can also be reduced. The heat sink 240 may be a metal plate or other plate made of a material having a high thermal conductivity.

The light emitting module 250 of the embodiment further includes a light reflecting sheet 258, an optical film 262 and a power control board 264. The retroreflective sheet 258 is disposed between the heat dissipation plate 240 and the light guide plate 252. The retroreflective sheet 258 is typically a white plastic sheet, but is not limited thereto. The retroreflective sheet 258 improves the utilization of light. The optical film 262 is disposed between the front cover 230 and the light guide plate 252. The optical film 262 is, for example, a diffusion sheet, an anti-glare sheet, or other optical film. Of course, the number of optical films 262 may also be plural. The power control board 264 is disposed on the front cover 230 and electrically connected to the circuit board 254.

The table lamp 200 of the present embodiment further includes an upper cover 270 assembled to the front cover 230. The heat dissipation plate 240 and the light emitting module 250 are located between the upper cover 270 and the front cover 230. The upper cover 270 can be combined with the front cover 230 by screws or other mechanisms.

The bracket module 220 of the embodiment includes a first rotating shaft 222, a bracket 224 and a second rotating shaft 226. The first rotating shaft 222 is disposed on the base 220. The first rotating shaft 222 is rotatable relative to the base 220 in a vertical direction. Two ends of the bracket 224 are pivotally connected to the first rotating shaft 222 and the second rotating shaft 226 respectively. Both the first rotating shaft 222 and the second rotating shaft 226 are rotatable relative to the bracket 224 in a horizontal direction. The other end of the second shaft 226 is to the front cover 230. The front cover 230 is rotatable relative to the second rotating shaft 226 in a vertical direction.

In summary, in the desk lamp of the present invention, the light-emitting module is directly fixed on the front cover by the heat dissipation plate, and the light-emitting module itself is not covered by the additional casing first, thereby reducing the number of components and reducing the overall size. On the other hand, the side-input design also reduces the amount of light-emitting components used, reduces the chance of glare causing user discomfort, and improves the uniformity of the light source.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100. . . Light-emitting diode table lamp

110. . . Light source

120. . . lampshade

200. . . table lamp

210. . . Base

220. . . Bracket module

222. . . First shaft

224. . . support

226. . . Second shaft

230. . . The front cover

232. . . Opening

234, 242. . . screw hole

240. . . Radiating plate

250. . . Light module

252. . . Light guide

252A. . . Light side

252B. . . Glossy surface

254. . . Circuit board

256. . . Light-emitting diode

258. . . Reflective sheet

262. . . Optical diaphragm

264. . . Power control board

270. . . Upper cover

FIG. 1 is a schematic diagram of a conventional light-emitting diode table lamp.

Figure 2 is an exploded view of a table lamp in accordance with an embodiment of the present invention.

Figure 3 is a partial perspective view of the table lamp of Figure 2.

200. . . table lamp

210. . . Base

220. . . Bracket module

222. . . First shaft

224. . . support

226. . . Second shaft

230. . . The front cover

232. . . Opening

240. . . Radiating plate

250. . . Light module

252. . . Light guide

254. . . Circuit board

256. . . Light-emitting diode

258. . . Reflective sheet

262. . . Optical diaphragm

264. . . Power control board

270. . . Upper cover

Claims (8)

A desk lamp comprising: a base; a bracket module assembled to the base; a front cover assembled to the bracket module, having an opening; a heat sink assembled to the front cover; and a lighting module The light is provided between the heat sink and the front cover, and the light provided by the light emitting module is emitted from the opening. The light-emitting module of claim 1, wherein the light-emitting module comprises: a light guide plate having a light-incident side and a light-emitting surface, wherein the light-emitting surface faces the opening; and a circuit board disposed on the light-emitting surface And a plurality of light emitting diodes disposed on the circuit board and electrically connected to the circuit board, wherein the light emitting diodes are located between the circuit board and the light incident side. The table lamp of claim 2, wherein the light-emitting module further comprises a light-reflecting sheet disposed between the heat-dissipating plate and the light-guiding plate. The table lamp of claim 2, wherein the light-emitting module further comprises an optical film disposed between the front cover and the light guide plate. The lamp of the second aspect of the invention, wherein the lighting module further comprises a power control panel disposed on the front cover and electrically connected to the circuit board. The table lamp of claim 1, further comprising an upper cover assembled to the front cover, wherein the heat dissipation plate and the light emitting module are located between the upper cover and the front cover. The table lamp of claim 1, wherein the bracket module comprises: a first rotating shaft disposed on the base; a bracket having one end pivoted to the first rotating shaft; and a second rotating shaft The two ends are respectively pivoted to the other end of the bracket and the front cover. The table lamp of claim 1, wherein the heat sink is a metal plate.