TWI575186B - Lamp structure - Google Patents

Description

Lamp structure

This proposal relates to a luminaire structure, in particular to a luminaire structure having a plastic tube.

Because the Light Emitting Diode (LED) is a "green" light source with high efficiency, energy saving, high efficiency, fast response, long life and no toxicity, it fully meets the dual demands of energy saving and environmental protection. Therefore, white light emitting diodes (LEDs) are bound to become the lighting source of the next generation.

The Industrial Economics and Knowledge Center (IEK) estimates that the scale of light-emitting diode (LED) lighting will reach approximately $35 billion in 2015. The penetration rate of the lighting industry is about 30%, and it is growing at an annual rate of 80%.

Most of today's LED lamps use aluminum or aluminum alloy as their heat-dissipating substrate. Light-emitting diode lamps made of aluminum or aluminum alloy are costly and heavy. Therefore, the industry began to develop a light-emitting diode lamp made of all plastic to reduce the weight and cost of the lamp. However, the current LED (LED) lamps made of plastic have the problems of insufficient assembly reliability and insufficient heat dissipation efficiency. For example, the upper and lower covers of the lamp tube are easily detached from each other by external force. Therefore, how to improve the assembly reliability and heat dissipation efficiency of the all-plastic tube will be the current manufacturer. One of the problems to be solved.

The proposal is to provide a lamp structure to improve the assembly reliability of the all-plastic lamp.

The lamp structure disclosed in the proposal comprises a plastic base, a light source and a plastic lamp cover. The plastic base includes a connected portion and a heat sink. The mounting portion has two outer wall surfaces, two card slots and a bearing surface connected to both ends of the heat dissipating portion. The two card slots are respectively located on the corresponding outer wall surfaces, and each card slot has a limiting surface. The two extension faces of the two limiting faces intersect and each other has a first angle. The first angle is less than 180 degrees. The light source is disposed on the bearing surface. The plastic lamp cover comprises a connected cover portion and a second buckle portion. The two fastening portions are respectively connected to opposite ends of the cover portion, and each of the fastening portions has an outer side surface. The two buckle portions are installed in the corresponding two card slots. The two outer sides respectively face the corresponding two limiting surfaces, and the covering portion covers the light source.

According to the luminaire structure disclosed in the above proposal, since the angle between the extended faces of the second limiting surface of the embodiment is less than 180 degrees, when the plastic lamp cover is pressed by the external force, the second limiting surface will abut against the two buckles. The outer side of the part is prevented from being disengaged from the card slot due to the relative expansion of the two buckle portions, thereby improving the assembly reliability of the lamp structure.

The above description of the contents of this proposal and the description of the following embodiments are used to demonstrate and explain the principles of this proposal, and to provide a further explanation of the scope of the patent application of this proposal.

10‧‧‧Lighting structure

100‧‧‧Plastic base

110‧‧‧Installation Department

111‧‧‧ bearing surface

112‧‧‧ outer wall

113‧‧‧ card slot

113a‧‧‧ Limiting surface

113b‧‧‧ first raised microstructure

113c‧‧‧Extended face

114‧‧‧Lock slot

115‧‧‧Fitting structure

116‧‧‧Bevel

120‧‧‧ Department of heat dissipation

121‧‧‧ concave microstructure

200‧‧‧Light source

210‧‧‧ circuit board

220‧‧‧Lighting diode

300‧‧‧ plastic lampshade

310‧‧‧ Covering Department

320‧‧‧Snap Department

321‧‧‧ outside side

322‧‧‧Second raised microstructure

400‧‧‧End cover

500‧‧‧Locker

Fig. 1 is a schematic cross-sectional view showing the structure of a lamp according to a first embodiment of the present proposal.

Fig. 2 is an exploded perspective view of Fig. 1.

Figure 3 is an exploded perspective view of the luminaire structure of Figure 1.

Figure 4 is a schematic cross-sectional view of the luminaire structure of Figure 1 when it is squeezed by a force outside the vertical plane. Figure.

Figure 5 is a schematic cross-sectional view showing the structure of the lamp according to the second embodiment of the present proposal.

Figure 6 is a cross-sectional view showing the structure of the lamp according to the third embodiment of the present proposal.

Please refer to Figure 1 and Figure 2. Fig. 1 is a schematic cross-sectional view showing the structure of a lamp according to a first embodiment of the present proposal. Fig. 2 is an exploded perspective view of Fig. 1.

The lamp structure 10 of the embodiment comprises a plastic base 100, a light source 200 and a plastic lamp cover 300. The light source 200 is disposed on the plastic base 100, and the plastic lamp cover 300 is mounted on the plastic base 100 and covers the light source 200.

The plastic base 100 includes a mounting portion 110 and a heat dissipating portion 120. The mounting portion 110 has a bearing surface 111, two outer wall surfaces 112, two card slots 113, two locking slots 114, and two fitting structures 115. The two outer wall surfaces 112 are connected to both ends of the heat dissipation portion 120, and the two outer wall surfaces 112 are connected to the bearing surface 111 by corresponding fitting structures 115, respectively. The two card slots 113 are respectively located on the corresponding outer wall surfaces 112 and are located on opposite sides of the bearing surface 111. The plastic lamp cover 300 can be fixedly engaged with the plastic base 100 by the arrangement of the card slots 113. In detail, each of the card slots 113 is a structure in which the outer wall surface 112 is recessed inward, and each of the card slots 113 has a limiting surface 113a. The limiting surface 113a is a sloped surface in the structure, and the limiting surface 113a Connected to the outer wall surface 112. In this embodiment, the limiting surface 113a is directly connected to the outer wall surface 112, but is not limited thereto. In other embodiments, the second limiting surface 113a may also be connected to the outer wall surface 112 through a guiding inclined surface.

In this embodiment, the second limiting surface 113a intersects the two extending surfaces 113c extending away from the light source 200 to generate a first angle θ1, and the first angle θ1 is less than 180 degrees. In an embodiment, the first angle θ1 It is between 20 degrees and 140 degrees to increase the effect of the buckle and limit of the two card slots 113.

In addition, the extension surface 113c of the second limiting surface 113a and the bearing surface 111 respectively have a second angle θ2 and a third angle θ3. The angle between the second included angle θ2 and the third included angle θ3 is between 20 degrees and 80 degrees, respectively. The second angle θ2 of the embodiment is equal to the third angle θ3, but is not limited thereto. In other embodiments, the second angle θ2 may also be different from the third angle θ3.

In addition, for convenience of description, the following is exemplified by the parallel horizontal plane of the bearing surface 111, that is, the extending surface 113c of the second limiting surface 113a and the horizontal plane are respectively clamped by 20 degrees to 80 degrees.

Each of the card slots 113 of the embodiment further includes at least one first protruding microstructure 113a. The first protruding microstructures 113a are located on the second limiting surface 113a to increase the clamping and limiting of the card slot 113. Avoid dropping the plastic lamp cover 300. The first convex microstructure 113a of the present embodiment is a serrated convex structure, but is not limited thereto. For example, in other embodiments, the first convex microstructure 113a may be a rib, a thread or A structure such as a stud or the like which can increase the frictional resistance of the limiting surface 113a.

The two locking slots 114 are respectively located on the corresponding outer wall surface 112 and are located on opposite sides of the bearing surface 111. In detail, the locking groove 114 is a structure in which the outer wall surface 112 is recessed inwardly, and each locking groove 114 is respectively located at the other end of the card slot 113 relative to the fitting structure 115, so that the card slot 113 is located in the fitting structure. 115 is between the lock groove 114.

Each of the fitting structures 115 connects the bearing surface 111 and the outer wall surface 112. Detailed The fitting structure 115 is an L-shaped member extending from the bearing surface 111 away from the heat dissipating portion 120 for fitting the light source 200 such that the light source 200 is disposed on the bearing surface 111.

The heat dissipation portion 120 further has a plurality of concave and convex microstructures 121 to increase the surface area of the heat dissipation portion 120, thereby increasing the heat dissipation effect of the heat dissipation portion 120.

In this embodiment, the mounting portion 110 of the plastic base 100 and the heat dissipating portion 120 are integrally formed by pressing a heat conductive plastic. The thermally conductive plastic comprises a resin and a plurality of thermally conductive materials. These thermally conductive materials are immersed in the resin to increase the thermal conductivity of the thermally conductive plastic. The content of the resin is between 40% and 80%, and the content of the thermally conductive material is between 60% and 20%. In this embodiment, the resin is selected from the group consisting of polypropylene and polycarbonate, and the heat conductive material is selected from the group consisting of glass fiber, mica, clay, calcium carbonate, graphite, magnesium oxide, titanium dioxide, and boron nitride. Group.

For example, as described in Table 1 and Table 2. Tables 1 and 2 show the proportional relationship of each formulation of the heat conductive plastic.

The thermal conductivity of the plastic base 100 made of the above thermally conductive plastic can be greater than 0.3 watt/meter. Kelvin (W/M.K) to improve the heat dissipation efficiency of the luminaire structure 10.

In this embodiment, the plastic base 100 is an integrally formed structure, but is not limited thereto. In other embodiments, the plastic base 100 may also be a non-integral structure.

The light source 200 includes a circuit substrate 210 and at least one light emitting diode 220. The light emitting diode 220 is disposed on the circuit substrate 210. The light source 200 is disposed on the mounting portion 110. In detail, the area of the carrying surface 111 is substantially equal to the area of the circuit substrate 210, and the circuit substrate 210 is matched with the fitting structure 115 of the mounting portion 110 to make the circuit substrate 210 The fitting structure 115 can be fitted to each other and fixedly disposed on the bearing surface 111. Since the light source 200 is fixed to the plastic base 100 and is in thermal contact with the bearing surface 111 , the heat generated by the operation of the light source 200 can be transmitted to the heat dissipation portion 120 through the bearing surface 111 of the mounting portion 110 .

The plastic lamp cover 300 includes a cover portion 310 and two hook portions 320 that are connected. The two latching portions 320 are respectively connected to opposite ends of the cover portion 310. Each of the latching portions 320 has an outer side surface 321 and a second protruding microstructure 322. The second protruding microstructure 322 is located on the outer side surface 321 and matches the first convex microstructure 113b in the card slot 113, and the latching portion 320 The outer side surface 321 is substantially parallel to the limiting surface 113a of the card slot 113. Therefore, when the two latching portions 320 are mounted on the corresponding two latching slots 113, the first protruding microstructures 113b and the second protruding microstructures 322 can be engaged with each other, so that the plastic lamp cover 300 can be fixed to the plastic base 100. on. The two outer side surfaces 321 respectively face the corresponding two limiting surfaces 113a, and the cover portion 310 covers the light source 200. In this embodiment, the shape of the latching portion 320 is matched to the shape of the slot 113, but it is not limited thereto. In other embodiments, the shape of the latching portion 320 may also be partially matched to the slot 113. Hollow shapes. In addition, the material of the plastic lamp cover 300 is a resin having light diffusing ability, for example, acrylic resin (PMMA) plus light diffusing particles such as silicone particles or polystyrene particles, or polycarbonate (PC). Plus light-diffusing particles such as silicone particles or PMMA particles.

In addition, the light source 200 of the embodiment is disposed in the plastic lamp cover 300 and the plastic base 100 made of a heat conductive plastic. The plastic can enable the light source 200 and other electronic circuits located in the plastic lamp cover 300 and the plastic base 100 to be electrically connected to the outside. Insulation, the luminaire structure 10 can easily meet the high voltage test before leaving the factory.

Please refer to Figure 3. Figure 3 is an exploded perspective view of the luminaire structure of Figure 1.

The luminaire structure 10 of the embodiment includes a two-end cover 400 and a plurality of fasteners 500. The two end caps 400 are respectively disposed at opposite ends of the assembled plastic base 100 and the plastic lamp cover 300, wherein each end cover 400 is provided with two holes 410. The holes 410 are respectively corresponding to the positions of the locking slots 114. The locking members 500 respectively pass through the two holes 410 of the two end covers 400 and are locked to the locking slots 114 at opposite ends of the plastic base 100. The two end caps 400 are respectively locked to opposite ends of the plastic base 100.

Please refer to Figure 4. Figure 4 shows the vertical structure of the luminaire structure of Figure 1. Schematic diagram of the cross-section of the force outside the surface.

When the cover portion 310 of the plastic lampshade 300 of the present embodiment is pressed by the force F1 perpendicular to the bearing surface 111, the two latching portions 320 of the plastic lampshade 300 should be oriented in the horizontal direction away from the card slot 113 (indicated by arrows respectively) The direction of a, b) is expanded, which in turn causes the plastic lamp cover 300 to be separated from the plastic base 100. However, because the first angle θ1 between the extended faces 113c of the second limiting surface 113a of the embodiment is less than 180 degrees, in other words, the second angle between the extended surface 113c of the second limiting surface 113a and the horizontal plane (or the bearing surface 111) The angle between the θ2 and the third angle θ3 is greater than 0 degrees, respectively. In an embodiment, the angle between the second angle θ2 and the third angle θ3 is between 20 degrees and 80 degrees, respectively, so when the second buckle portion 320 is to be expanded, The second limiting surface 113a provides an inward and outward force F2, F3 to abut the two latching portions 320 to prevent the two latching portions 320 from being outwardly expanded and disengaged from the card slot 113, thereby improving the assembly reliability of the lamp structure 10. .

In addition, when the two latching portions 320 are fastened to the two latching slots 113, since the first protruding microstructures 113b of the latching slots 113 are engaged with the second protruding microstructures 321 of the latching portions 320, the lamps can be further improved. Assembly reliability of the structure 10.

Please refer to FIG. 5, which is a cross-sectional view showing the structure of the lamp according to the second embodiment of the present proposal. This embodiment is similar to the embodiment of Fig. 1 described above, and therefore only the differences between the two embodiments will be described.

The mounting portion 110 of the present embodiment further has two inclined surfaces 116. Each inclined surface 116 is connected to the corresponding fitting structure 115 and the outer wall surface 112 such that the bearing surface 111 and the two inclined surfaces 116 form a recessed toward the heat radiating portion 120. Groove 117. The two inclined surfaces 116 and the bearing surface 111 respectively have a fourth angle θ4 and a fifth angle θ5, and the fourth angle θ4 and the fifth angle θ5 are respectively between 135 degrees and 150 degrees. In this embodiment, the angle of the fourth included angle θ4 is the same as the fifth included angle θ5. However, it is not limited thereto. In other embodiments, the angle of the fourth angle θ4 may also be different from the fifth angle θ5.

Furthermore, the recess 117 has a bottom surface 117a with respect to the bearing surface 111. The heat dissipation portion 120 has an inner wall surface 122 with respect to the uneven microstructures 121. The inner wall surface 122 faces the bottom surface 117a. The vertical distance H between the bottom surface 117a of the recess 117 and the lowest point of the inner wall surface 122 of the heat dissipating portion 120 is between 1 mm and 3 mm.

The light source 200 is fixed to the bearing surface 111 through the fitting structure 115, and when the light emitting diode 220 emits a light beam, the inclined surface 116 blocks the light of the edge of the light beam. Since the edge of the beam often produces a spot phenomenon, the bevel 116 blocks the light at the edge of the beam, which helps to slow down the spot phenomenon and improve the illumination quality. In addition, since the bearing surface 111 and the two inclined surfaces 116 form a recess 117 that is recessed toward the heat dissipating portion 120, the distance between the light source 200 and the plastic lamp cover 300 is relatively elongated, thereby improving the overall diffusion effect and producing a beautiful light pattern.

Please refer to FIG. 6. FIG. 6 is a schematic cross-sectional view showing the structure of the lamp according to the third embodiment of the present proposal. This embodiment is similar to the embodiment of Fig. 5 described above, and therefore only the differences between the two embodiments will be described.

The embodiment of the present embodiment is different from the embodiment of FIG. 5 in that the lamp structure 10 of the embodiment of FIG. 5 is circular, and the lamp structure 10 of the embodiment is elliptical. Further, the mounting portion 110 of the present embodiment has no locking groove 114.

According to the luminaire structure disclosed in the above proposal, since the angle between the extended faces of the second limiting surface of the embodiment is less than 180 degrees, when the plastic lamp cover is pressed by the external force, the second limiting surface will abut against the two buckles. In order to avoid the two buckle portions from being outwardly expanded and disengaged from the card slot, thereby improving the assembly reliability of the lamp structure.

In addition, when the two latching portions are fastened to the two card slots, the first protruding microstructure of the card slot is engaged with the second protruding microstructure of the latching portion to further improve the assembly reliability of the lamp structure.

Furthermore, the plastic base and the plastic lamp cover are made of the above-mentioned heat conductive plastic, so that the thermal conductivity of the plastic can be increased to improve the heat dissipation efficiency of the lamp structure.

Moreover, since the light source is disposed in the lamp cover and the base made of the heat conductive plastic, the plastic can protect the light source from the external electrical insulation, so the lamp structure can easily conform to the high voltage test before leaving the factory.

Although the embodiments of the present disclosure are as described above, and are not intended to limit the present proposal, any person skilled in the art, regardless of the spirit and scope of the proposal, may have the shapes, structures, and features described in the scope of the application of the present proposal. And the quantity can be changed slightly, so the scope of patent protection of this proposal shall be subject to the definition of the scope of patent application attached to this specification.

10‧‧‧Lighting structure

100‧‧‧Plastic base

110‧‧‧Installation Department

111‧‧‧ bearing surface

112‧‧‧ outer wall

113‧‧‧ card slot

113a‧‧‧ Limiting surface

113b‧‧‧ first raised microstructure

113c‧‧‧Extended face

114‧‧‧Lock slot

115‧‧‧Fitting structure

120‧‧‧ Department of heat dissipation

121‧‧‧ concave microstructure

200‧‧‧Light source

210‧‧‧ circuit board

220‧‧‧Lighting diode

300‧‧‧ plastic lampshade

310‧‧‧ Covering Department

320‧‧‧Snap Department

321‧‧‧ outside side

322‧‧‧Second raised microstructure

Claims (15)

A lamp structure comprising: a plastic base, comprising a connecting portion and a heat dissipating portion, the mounting portion having two outer wall surfaces, two card slots and a bearing surface connected to the two ends of the heat dissipating portion, the two cards The slots are respectively located on the corresponding outer wall surface, and each of the slots has a limiting surface, and the two extending surfaces of the two limiting surfaces intersect and each other has a first angle, the first angle is less than 180 degrees; a light source is set And a plastic cover, comprising a cover portion and a second buckle portion, wherein the two buckle portions are respectively connected to opposite ends of the cover portion, and each of the buckle portions has An outer side surface is disposed on the corresponding two card slots, and the two outer side surfaces respectively face the corresponding two limiting surfaces, and the cover portion covers the light source. The luminaire structure of claim 1, wherein the two extension surfaces extend the second limiting surface away from the light source, and the first angle is between 20 degrees and 140 degrees. The luminaire structure of claim 1, wherein the two extending faces of the two limiting faces and the bearing surface respectively have a second angle and a third angle, and the second angle and the third angle are between 20 degrees and 80 degrees. The luminaire structure of claim 1, wherein each of the card slots further comprises at least one first convex microstructure, the first convex microstructure is located on the limiting surface, and each of the fastening portions further comprises At least one second raised microstructure, the first raised microstructure engaging the second raised microstructure. The luminaire structure of claim 1, wherein the mounting portion further comprises two fitting structures, wherein the two outer wall surfaces are respectively connected to the bearing surface by the corresponding fitting structure, and the fitting structure is The bearing surface faces the L-shaped member extending away from the heat dissipating portion. The luminaire structure of claim 5, wherein the light source comprises a circuit substrate and at least one light emitting diode, the at least one light emitting diode is disposed on the circuit substrate, and the circuit substrate is coupled to the two The structures are fitted to each other and disposed on the bearing surface. The luminaire structure of claim 5, wherein the mounting portion further has two inclined surfaces, each of the inclined surfaces being connected to the corresponding fitting structure and the outer wall surface, so that the bearing surface and the two inclined surfaces form a heat dissipation a groove recessed in the direction of the portion. The luminaire structure of claim 7, wherein the two inclined surfaces and the bearing surface respectively have a fourth angle and a fifth angle, and the fourth angle and the fifth angle are between 135 degrees and 150 degrees. The luminaire structure of claim 7, wherein the groove further has a bottom surface with respect to the bearing surface, and the heat dissipating portion has an inner wall surface facing the bottom surface, and a vertical distance between the bottom surface and a lowest point of the inner wall surface Between 1 mm and 3 mm. The luminaire structure of claim 1, wherein the heat dissipating portion further has a plurality of concave and convex microstructures. The luminaire structure of claim 5, further comprising two locking slots, each of the locking slots being located at the other end of the card slot relative to the fitting structure, such that the card slot is located in the fitting structure and the Between the locking slots. The luminaire structure of claim 11, further comprising at least one end cover and two lock fasteners, the end cover having two holes, the two locks respectively passing through the two holes of the end cover and locked to the plastic base Two locking slots. The luminaire structure of claim 1, wherein the plastic pedestal is made of a thermally conductive plastic comprising a resin and a plurality of thermally conductive materials, the thermally conductive material being immersed in the resin, the resin being selected from the group consisting of polypropylene And a group of polycarbonates selected from the group consisting of glass fibers, mica, clay, calcium carbonate, graphite, magnesia, titania, and boron nitride. Group. The luminaire structure of claim 13, wherein the resin content is between 40% and 80%, and the thermal conductive material is between 60% and 20%. The luminaire structure according to claim 11, wherein the plastic base has a thermal conductivity greater than 0.3 watt/meter. Kelvin (W/M.K).