TWI770611B - Light emitting device - Google Patents

Abstract

The present invention discloses a light emitting device, which includes a light source module, a connecting member and a light guide pipe. The light source module includes a light emitting units. The connecting member is disposed above the light source module. The connecting member includes an opening, an engagement portion and at least one guide portion. The light emitting units are disposed in the opening. The engagement portion is disposed around the opening, and the engagement portion has an open side and a closed side. The guide portion is disposed on an inner surface of the engagement portion, and the guide portion is gradually bulged from the open side toward the closed side. The guide portion has a bottom surface, which corresponds to the closed side, and the bottom surface and the closed side form a limited area. The light guide pipe is guided into the limited area along the guide portion from the open side, and the bottom surface of the guide portion abuts against the light guide pipe.

Description

light-emitting device

The present invention relates to a light-emitting device, in particular to an assembly structure of the light-emitting device.

Lighting equipment is an indispensable tool in daily life. In addition to ordinary homes or public environments, it is also used in vehicles such as locomotives and automobiles. With the development of science and technology, the light source of car lights has been replaced from the traditional halogen light source to the light-emitting diode (LED) light source. After the light emitting diode (LED) light source is applied to the car lamp, various designs different from the traditional car lamp begin to appear, for example, the light mixing tube is used to realize the car lamp with various line and light color effects.

Since the etendue of the light source itself is larger than that of the light mixing tube, the overall optical system efficiency is not high. In order to improve the optical efficiency, the light mixing tube is generally placed very close to the light source to increase the proportion of light entering the light mixing tube, thereby improving the optical efficiency. However, it is not easy to place the light mixing tube very close to the light source, thereby increasing the difficulty of the production process. Therefore, how to efficiently assemble the light source and the light mixing tube becomes a big challenge. In addition, when the vehicle body is running, the light-emitting device is placed in a high-vibration environment. How to effectively fix the relative positions of the light source and the light mixing tube is also an urgent problem to be solved at present.

In view of the above problems, the main purpose of the present invention is to provide a light-emitting device, with the structure of the connector having an opening, a clip portion and a guide portion, the light-emitting unit is located in the opening, and the guide portion and the clip portion guide And the light guide tube is assembled to solve the problem of difficult assembly of the conventional light-emitting device.

In order to achieve the above object, the present invention provides a light-emitting device, which includes a light source module, a connector and a light guide tube. The light source module includes a plurality of light emitting units. The connecting piece is arranged above the light source module, and the connecting piece includes an opening, a clamping part and at least one guiding part. The light-emitting units are located in the openings. The clamping part is arranged around the opening, and the clamping part has an open side and a closed side. The guide portion is arranged on an inner surface of the clamping portion, and the guide portion gradually protrudes from the open side toward the closed side. The guide portion has a bottom surface corresponding to the closed side, and the bottom surface and the closed side form a limiting area. The light guide pipe is guided into the limiting area along the guide portion from the open side, and the bottom surface of the guide portion abuts the light guide pipe.

According to an embodiment of the present invention, the light source module further includes a heat dissipation element and a circuit board. The circuit board is arranged above the heat dissipation element, and the connector and the circuit board are fixed on the heat dissipation element.

According to an embodiment of the present invention, the heat dissipation element further includes a positioning post, and the circuit board and the connecting member together form a positioning hole. The positioning post passes through the positioning hole.

According to an embodiment of the present invention, the light guide further includes at least one extension portion extending outward from an outer sidewall of the light guide, and the bottom surface of the guide portion abuts the extension portion.

According to an embodiment of the present invention, the extension part and the guide part interfere with each other and then enter the limiting area.

According to an embodiment of the present invention, the closed side abuts a surface of the light pipe.

According to an embodiment of the present invention, the opening of the connector is located in the limiting area, and one end surface of the light guide tube corresponds to the light emitting units.

According to an embodiment of the present invention, an upper surface of the light-emitting units is located in the opening, so that the light-emitting units are spaced from the end surface of the light pipe.

According to an embodiment of the present invention, the connecting member further includes at least one protruding portion disposed between the opening and the engaging portion. The end surface of the light guide tube abuts against the convex portion, so that the light emitting units are spaced from the end surface of the light guide tube.

According to an embodiment of the present invention, the protruding portion is a strip-shaped protruding rib that gradually protrudes from the open side toward the closed side.

According to an embodiment of the present invention, the clamping portion has a first reflective layer disposed on the inner surface of the clamping portion.

According to an embodiment of the present invention, the light-emitting device further includes a carrying unit. The carrying unit has a groove and one side opening. The side opening communicates with the groove, the bearing unit is arranged on the connecting piece, and the side opening corresponds to the limiting area, so that the light guide tube is accommodated in the groove.

According to an embodiment of the present invention, the bearing unit has a second reflective layer disposed on an inner surface of the groove.

As mentioned above, the light-emitting device according to the present invention includes a light source module, a connector and a light guide tube, and the connector includes an opening, a clip portion and a guide portion. The light-emitting unit of the light source module is located in the opening, and the clamping portion is arranged around the opening. Due to the structure that the clipping portion has an open side and a closed side, and the guide portion faces from the open side to the closed side, the light guide pipe can be guided into the limiting area along the guide portion from the open side, which is equivalent in assembly. Simple and convenient. In addition, after the light guide pipe enters the limiting area, the bottom surface of the guide part abuts the light guide pipe, so as to achieve the effect of fixing the light guide pipe at the same time, and the relative position of the light emitting unit and the light guide pipe can be stably fixed. In addition, since the light emitting unit is located in the opening, the light guide pipe can be quite close to the light emitting unit, but will not directly contact the light emitting unit, and there is a reserved space between the two. The structural design of the connector is still relatively easy to mass-produce without increasing the difficulty of the production process.

In order to enable your examiners to better understand the technical content of the present invention, the preferred specific embodiments are described as follows.

1 is a schematic view of the appearance of a light-emitting device according to an embodiment of the present invention, FIG. 2 is a schematic view of a light source module and a connector shown in FIG. 1 , and FIG. 3 is an exploded schematic view of the light source module and the connector shown in FIG. 2 , please refer to Figure 1, Figure 2 and Figure 3 at the same time. The light-emitting device 1 of the present embodiment is applied to a vehicle lamp, preferably an automobile lamp. In this embodiment, the light-emitting device 1 includes a light source module 10 , a connector 20 and a light guide tube 30 . The light source module 10 includes a plurality of light emitting units 11 , a heat dissipation element 12 and a circuit board 13 . The light-emitting unit 11 is disposed on the circuit board 13 , and controls all or part of the light-emitting units 11 to emit light through a circuit (control unit) on the circuit board 13 .

The circuit board 13 is disposed above the heat dissipation element 12 , and the connecting member 20 is disposed above the circuit board 13 . Specifically, the heat dissipation element 12 includes positioning posts 121 and heat dissipation fins 122 , which are respectively located on two opposite surfaces of the heat dissipation element 12 . The circuit board 13 is disposed on the surface with the positioning posts 121 . Correspondingly, the circuit board 13 has a first through hole 131 , and the connector 20 has a second through hole 21 (as shown in FIG. 3 ). The first through hole 131 and the second through hole 21 can communicate with each other to form a positioning hole P (as shown in FIG. 1 and shown in Figure 2). In other words, the circuit board 13 and the connector 20 together form the positioning hole P, so that the positioning column 121 of the heat dissipation element 12 can pass through the positioning hole P (the first through hole 131 and the second through hole 21 ), thereby connecting the circuit board 13 and the connection The components 20 are jointly fixed to the heat dissipating element 12 . The heat dissipation fins 122 are located on one surface opposite to the circuit board 13 and the connector 20 , and the heat energy generated by the light emitting unit 11 and the circuit board 13 can be dissipated from the other surface by the heat dissipation fins 122 .

In addition, the connecting member 20 includes an opening 22 , a clamping portion 23 and at least one guiding portion 24 . When the connector 20 is disposed above the circuit board 13 of the light source module 10 , the opening 22 corresponds to the light-emitting unit 11 , and the light-emitting unit 11 is located in the opening 22 of the connector 20 . The snap portion 23 is disposed around the opening 22 and is perpendicular to the upper surface 25 of the connector 20 (ie, opposite to the side surface of the circuit board 13 ). In addition, the engaging portion 23 has an open side 231 and a closed side 232 . In this embodiment, the engaging portion 23 is in a U-shape, and the closed side 232 is formed by three side walls, and the opening of the U-shape is the open side 231 .

The guide portion 24 is disposed on an inner surface 233 of the engaging portion 23 , and the guide portion 24 extends from the open side 231 to the closed side 232 . Specifically, the connector 20 of this embodiment has two guide portions 24 located on two opposite side walls of the engaging portion 23 . The guide portion 24 is a sloped structure gradually protruding from the open side 231 toward the closed side 232 , so that the opening width of the open side 231 is tapered toward the closed side 232 . Also, the guide portion 24 has a bottom surface 241 corresponding to the closed side 232 . The bottom surface 241 and the closed side 232 form a limiting area R (as shown in FIG. 2 and FIG. 3 ), which is used to restrict and fix the light guide 30 (as shown in FIG. 1 ).

During assembly, the light pipe 30 can be guided into the limiting region R along the guide portion 24 from the open side 231 . Generally speaking, the light guide 30 is a plastic part, and the connecting part 20 of this embodiment can also be a plastic part. The assembler or equipment can first correspond to the open side 231 of the light guide 30, and as the guide portion 24 gradually protrudes from the open side 231 toward the closed side 232, the light guide 30 and the guide portion 24 can interfere with each other. into the limit area R. Next, the bottom surface 241 of the guide portion 24 abuts the light pipe 30 , thereby fixing the light pipe 30 in the limiting region R. As shown in FIG.

Preferably, as shown in FIG. 1 , the light pipe 30 further includes at least one extension portion 31 , and the bottom surface 241 of the guide portion 24 abuts against the extension portion 31 of the light pipe 30 . In this embodiment, the light guide 30 has two extending portions 31 , and the extending portions 31 extend outward from an outer side wall 32 of the light guide 30 to correspond to the positions of the guiding portions 24 respectively. During assembly, the light guide 30 is placed on the open side 231 , and the extension portion 31 is corresponding to the guide portion 24 , so that the extension portion 31 can move to the closed side 232 along the inclined surface structure of the guide portion 24 . After the extension portion 31 and the guide portion 24 interfere with each other, the light guide 30 and its extension portion 31 enter the limiting region R. Next, the bottom surface 241 of the guide portion 24 abuts against the extension portion 31 , thereby fixing the light pipe 30 in the limiting region R. As shown in FIG. Preferably, the area of the limiting region R and the thickness of the light guide 30 cooperate with each other, so that after the light guide 30 is placed in the limiting region R, the closed side 232 can abut the surface of the light guide 30 .

Preferably, the bottom surface 241 of the guiding portion 24 is perpendicular to the inner surface 233 of the engaging portion 23 . Specifically, the guide portion 24 of this embodiment is a right-angled triangle as a whole, and its hypotenuse is the aforementioned bevel structure, one of which is connected to the inner surface 233 of the engaging portion 23 , and the other is the bottom surface 241 . Correspondingly, the extension portion 31 has a flat surface, so that the bottom surface 241 can stably abut the extension portion 31 without causing shaking.

Preferably, the connecting member 20 further includes at least one protruding portion 26 . In this embodiment, two protruding portions 26 are used as an example, and are disposed on two opposite sides of the opening 22 . Specifically, the protruding portion 26 is located on the upper surface 25 of the connecting member 20 and is disposed between the opening 22 and the engaging portion 23 . In addition, the protruding portion 26 is a strip-shaped protruding rib that gradually protrudes from the open side 231 toward the closed side 232 . Specifically, the height of the front end (ie, near the open side 231 ) of the convex portion 26 is relatively low, and gradually protrudes toward the closed side 232 . When the light pipe 30 is placed on the open side 231 , the bottom edge of the light pipe 30 is in contact with the front end (lower height) of the convex portion 26 . When the light pipe 30 is pushed to the closed side 232 to move, the structure of the convex portion 26 gradually protruding can further guide and guide the light pipe 30 into the limiting region R. As shown in FIG. In other words, the structure in which the protruding portion 26 gradually protrudes can achieve the effect of a sliding rail.

FIG. 4 is a partial cross-sectional schematic diagram of the light-emitting device shown in FIG. 1 , please refer to FIGS. 1 and 4 . Since the opening 22 of the connector 20 and the light pipe 30 are located in the limiting region R, one end surface 33 of the light pipe 30 can correspond to the light emitting unit 11 to receive the light generated by the light emitting unit 11 . The light emitted by the light emitting unit 11 may have different colors respectively. The light enters the light pipe 30 through the opening 22 , and produces a mixed light effect during the transmission in the light pipe 30 . In other words, the light guide tube 30 of this embodiment can be used as a light mixing tube.

The light-emitting unit 11 of this embodiment is disposed in the opening 22 , and an upper surface 111 of the light-emitting unit 11 is located in the opening 22 . In other words, the upper surface 111 of the light emitting unit 11 does not protrude from the opening 22 , but is inside the opening 22 . In addition, the end surface 33 of the light pipe 30 abuts against the convex portion 26, so that there is a distance between the light emitting unit 11 and the end surface 33 of the light pipe 30 (as shown in FIG. 4), so as to avoid the end surface 33 of the light pipe 30 and the light emitting unit. 11 Direct contact. It should be noted that, in other embodiments, even if there is no convex portion 26 , the light emitting unit 11 can have a distance S from the end face 33 of the light pipe 30 by the structure that the light emitting unit 11 is disposed in the opening 22 . The convex portion 26 is a better means to increase the spacing S.

Common materials of the light pipe 30 often have the characteristics of thermal expansion and contraction. If the end surface 33 of the light pipe 30 directly contacts the light emitting unit 11 , when the temperature increases, the volume of the light pipe 30 increases due to thermal expansion, which will press and destroy the light emitting unit 11 . In this embodiment, by disposing the light-emitting unit 11 in the opening 22 or disposing the convex portion 26, there is a reserved space (spacing S) between the light-emitting unit 11 and the end face 33 of the light guide tube 30, so that light guide can be avoided. The tube 30 destroys the light emitting unit 11 due to thermal expansion.

Preferably, the engaging portion 23 of this embodiment has a first reflective layer 234 disposed on the inner surface 233 of the engaging portion 23 . Preferably, the first reflective layer 234 is located in the limiting region R. The light emitted (leaked) from the area where the light pipe 30 is connected to the connector 20 can be reflected back to the light pipe 30 through the first reflective layer 234 for reuse, thereby improving the optical efficiency.

FIG. 5 is a schematic view of the appearance of a light-emitting device according to another embodiment of the present invention. Please refer to FIG. 5 . It should be noted that the difference between the light-emitting device 1 a of the present embodiment and the light-emitting device 1 of the previous embodiment is that the light-emitting device 1 a of the present embodiment further includes a carrying unit 40 . Since other elements and their connection relationships are the same, the element symbols in the foregoing embodiments are used. In this embodiment, the bearing unit 40 has a groove 41 and a side opening 42 , and the side opening 42 communicates with the groove 41 . The carrying unit 40 is disposed on the connecting member 20 , and the side opening 42 corresponds to the limiting area R, so that the light guide 30 can pass through the side opening 42 to be accommodated in the groove 41 . Specifically, the side wall 43 of the carrying unit 40 abuts against the top surface of the engaging portion 23 , so that the side opening 42 corresponds to the limiting region R. As shown in FIG. Since the side opening 42 communicates with the groove 41 , the light guide 30 positioned in the limiting region R can pass through the side opening 42 and be accommodated in the groove 41 .

The light exit surface 34 of the light guide 30 faces the opening 411 of the groove 41 . The light inside the light pipe 30 can exit the light pipe 30 from the light exit surface 34 , and is mixed again in the groove 41 , and then emitted from the opening 411 to the outside of the light emitting device 1 a . Preferably, the bearing unit 40 has a second reflective layer 44 disposed on the inner surface of the groove 41 . After the light exits the light guide 30 from the light exit surface 34 , the less collimated light can be reflected again when it hits the second reflective layer 44 in the groove 41 , so as to increase the optical efficiency and improve the uniformity of light mixing.

To sum up, the light-emitting device according to the present invention includes a light source module, a connector and a light guide tube, and the connector includes an opening, a clip portion and a guide portion. The light-emitting unit of the light source module is located in the opening, and the clamping portion is arranged around the opening. Due to the structure that the clipping portion has an open side and a closed side, and the guide portion faces from the open side to the closed side, the light guide pipe can be guided into the limiting area along the guide portion from the open side, which is equivalent in assembly. Simple and convenient. In addition, after the light guide pipe enters the limiting area, the bottom surface of the guide part abuts the light guide pipe, so as to achieve the effect of fixing the light guide pipe at the same time, and the relative position of the light emitting unit and the light guide pipe can be stably fixed. In addition, since the light emitting unit is located in the opening, the light guide pipe can be quite close to the light emitting unit, but will not directly contact the light emitting unit, and there is a reserved space between the two. The structural design of the connector is still relatively easy to mass-produce without increasing the difficulty of the production process.

It should be noted that the above-mentioned embodiments are given as examples for the convenience of description, and the scope of the claims claimed in the present invention should be based on the scope of the patent application, rather than being limited to the above-mentioned embodiments.

1. 1a: Light-emitting device 10: Light source module 11: Lighting unit 111: Upper surface 12: Cooling components 121: Positioning column 122: cooling fins 13: circuit board 131: First Perforation 20: Connectors 21: Second Perforation 22: Opening 23: Snap part 231: Open Side 232: closed side 233: inner surface 234: first reflective layer 24: Guidance Department 241: Underside 25: Top surface 26: convex part 30: light guide 31: Extensions 32: Outer side wall 33: End face 34: light-emitting surface 40: Bearing unit 41: Groove 411: Opening 42: side opening 43: Sidewall 44: Second reflective layer P: Positioning hole R: limit area S: Spacing

FIG. 1 is a schematic view of the appearance of a light-emitting device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of the light source module and the connector shown in FIG. 1 . FIG. 3 is an exploded schematic view of the light source module and the connector shown in FIG. 2 . FIG. 4 is a partial cross-sectional schematic view of the light-emitting device shown in FIG. 1 . FIG. 5 is a schematic view of the appearance of a light emitting device according to another embodiment of the present invention.

1: Lighting device

10: Light source module

11: Lighting unit

12: Cooling components

121: Positioning column

122: cooling fins

13: circuit board

20: Connectors

22: Opening

23: Snap part

231: Open Side

232: closed side

234: first reflective layer

24: Guidance Department

241: Underside

25: Top surface

26: convex part

30: light guide

31: Extensions

32: Outer side wall

33: End face

P: Positioning hole

Claims (13)

A light-emitting device, comprising: a light source module, including a plurality of light-emitting units; A connector is arranged above the light source module, and the connector includes: an opening, the light-emitting units are located in the opening; a clamping portion disposed around the opening, and the clamping portion has an open side and a closed side; and At least one guide portion is disposed on an inner surface of the engaging portion, the guide portion gradually protrudes from the open side toward the closed side, the guide portion has a bottom surface corresponding to the closed side, the The bottom surface and the closed side form a limiting area; and A light guide pipe is guided along the guide portion from the open side into the limiting area, and the bottom surface of the guide portion abuts the light guide pipe. The light-emitting device of claim 1, wherein the light source module further comprises a heat dissipation element and a circuit board, the circuit board is disposed above the heat dissipation element, and the connector and the circuit board are fixed to the heat dissipation element. The light-emitting device according to claim 2, wherein the heat dissipation element further comprises a positioning post, the circuit board and the connecting member together form a positioning hole, and the positioning post passes through the positioning hole. The light-emitting device of claim 1, wherein the light guide further comprises at least one extension portion extending outward from an outer sidewall of the light guide, and the bottom surface of the guide portion abuts against the extension portion. The light-emitting device according to claim 4, wherein the extending portion and the guiding portion interfere with each other and then enter the limiting area.

The light-emitting device of claim 1, wherein the closed side abuts a surface of the light pipe. The light-emitting device according to claim 1, wherein the opening of the connector is located in the limiting area, and one end surface of the light guide tube corresponds to the light-emitting units. The light-emitting device according to claim 7, wherein an upper surface of the light-emitting units is located in the opening, so that the light-emitting units and the end surface of the light pipe have a distance. The light-emitting device as claimed in claim 7, wherein the connector further comprises at least one protruding portion disposed between the opening and the engaging portion, the end surface of the light guide abuts the protruding portion, so that the light-emitting parts are illuminated The unit is spaced from the end face of the light pipe. The light-emitting device as claimed in claim 9, wherein the protruding portion is a strip-shaped protruding rib that gradually protrudes from the open side toward the closed side. The light-emitting device of claim 1, wherein the engaging portion has a first reflective layer disposed on the inner surface of the engaging portion. The light-emitting device as claimed in claim 1, further comprising: a bearing unit, which has a groove and an opening on one side, the side opening communicates with the groove, the bearing unit is arranged on the connecting piece, and the side opening corresponds to the limiting area, so that the light guide tube is accommodated in the the groove. The light-emitting device of claim 12, wherein the carrying unit has a second reflective layer disposed on an inner surface of the groove.

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