TWI772084B - light-emitting device - Google Patents

Abstract

A light-emitting device includes a light-transmitting tube body and a light-emitting module. The light-emitting module includes a flexible circuit board disposed in the light-transmitting tube body, and a plurality of light-emitting components electrically connected to the flexible circuit board. The flexible circuit board includes a base layer and a conductive layer arranged on one side of the base layer. The conductive layer has a lead portion for electrically connecting the light-emitting elements, and a plurality of support portions. Each of the supporting parts has several holes. Through the design that the conductive layer has the support parts and each support part has the holes, the overall structural strength of the flexible circuit board can be reduced, so that the flexible circuit board can be smoothly bent when it is curled, so as to facilitate assembly , and at the same time, it can avoid concave folds on the flexible circuit board and affect the service life.

Description

light-emitting device

The present invention relates to a light-emitting device, in particular to a light-emitting device for lighting.

A known light-emitting device includes a light-transmitting tube body, a light-emitting module disposed in the light-transmitting tube body, and two end caps respectively disposed at both ends of the light-transmitting tube body. The light-emitting module includes a flexible circuit board and a plurality of light-emitting elements arranged on the flexible circuit board.

The flexible circuit board of the known light-emitting device can be rolled into a tube shape through the elasticity of its own material and abut against the light-transmitting tube body. This design simplifies the assembly operation of the known light-emitting device and is quite convenient. Although compared with the traditional printed circuit board, the flexible circuit board has elasticity to facilitate curling, however, the flexible circuit board still has considerable hardness. During the bending process, the flexible circuit may not be flexible enough to cause the flexible circuit There are concave folds on the board, which not only prevents the flexible circuit board from being fitted into the light-transmitting tube body, but also affects the service life of the flexible circuit board. Therefore, how to develop a light-emitting device for the flexible printed circuit board that is more flexible to facilitate curling is one of the goals of the industry.

Accordingly, it is an object of the present invention to provide a light emitting device that ameliorates at least one of the disadvantages of the prior art.

Therefore, the light-emitting device of the present invention includes a light-transmitting tube body and a light-emitting module. The light-emitting module includes a flexible circuit board disposed in the light-transmitting tube body, and a plurality of light-emitting components electrically connected to the flexible circuit board. The flexible circuit board includes a base layer and a conductive layer arranged on one side of the base layer. The conductive layer has a lead portion for electrically connecting the light-emitting elements, and a plurality of support portions. Each of the supporting parts has several holes.

The effect of the present invention is: through the design that the conductive layer has the supporting portions and each of the supporting portions has the holes, the overall structural strength of the flexible circuit board can be reduced, so that the flexible circuit board can be rolled smoothly The flexible circuit board is bent to facilitate assembly, and at the same time, concave folds on the flexible circuit board can be avoided to affect the service life.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are designated by the same reference numerals.

Referring to FIGS. 1 , 2 and 3 , a first embodiment of the light-emitting device of the present invention includes a hollow tubular light-transmitting tube body 1 , a light-emitting module 2 , and end caps 3 .

The light-transmitting tube body 1 includes a tube body portion 11 extending from left to right and having an inner peripheral surface 13 , and two extending from the left and right ends of the tube body portion 11 coaxially away from each other and gradually diametrically opposite to the tube body portion 11 . The constricted nozzle portion 12. The light-transmitting tube body 1 is made of a light-transmitting material, such as but not limited to glass.

The light-emitting module 2 includes a flexible circuit board 21 that is bent in the light-transmitting tube body 1 and elastically stretched toward the inner peripheral surface 13 , and a plurality of flexible circuit boards 21 are electrically connected to the curved outer surface of the flexible circuit board 21 . The light emitting element 22 abutting on the inner peripheral surface 13 , a control circuit board 23 electrically connected to one end of the flexible circuit board 21 and capable of controlling the light emitting elements 22 , and two power lines 24 electrically connected to the control circuit board 23 .

Referring to FIGS. 2 , 3 and 4 , in the first embodiment, the light-emitting elements 22 are arranged in multiple rows at intervals along the length of the light-transmitting tube body 1 , and the rows are staggered. The arrangement of the light-emitting elements 22 can be arranged according to actual requirements, and is not limited by the above-described manner. Furthermore, the control circuit board 23 is arranged inside the light-transmitting tube body 1 , but in implementation, it can also be arranged outside the light-transmitting tube body 1 , which is not limited by the above method.

It is worth mentioning that the light-emitting elements 22 are disposed on the curved outer side of the flexible circuit board 21, so that the control circuit board 23 disposed in the light-transmitting tube body 1 will not block the light-emitting elements 22, Further, the portion of the light-transmitting tube body 1 corresponding to the control circuit board 23 can also provide illumination. Moreover, the heat energy generated when the light-emitting elements 22 emit light can also be directly conducted to the outside through the light-transmitting tube body 1, which is helpful for heat dissipation.

4 , 5 and 6 , the flexible circuit board 21 includes a base layer 211 , a conductive layer 212 disposed on one side of the base layer 211 , and a conductive layer 212 disposed on the opposite side of the base layer 211 . protective layer 213 . The base layer 211 is made of insulating material and has good bending properties, such as but not limited to polyimide (PI). The conductive layer 212 is made of conductive material, such as but not limited to copper. The protective layer 213 is made of insulating material, and is used to protect the conductive layer 212 and isolate the conductive layer 212 from the outside world.

The conductive layer 212 has a lead portion 214 arranged vertically and horizontally for electrically connecting the light-emitting elements 22 , and a plurality of support portions 215 arranged in a matrix. Each of the supporting portions 215 is rectangular, and is spaced apart from the lead portion 214 to be insulated from the lead portion 214 , and has a plurality of holes 216 arranged in a grid.

In detail, each of the supporting portions 215 has the structure of the holes 216, which can reduce the overall structural strength of the flexible circuit board 21, but will not cause the flexible circuit board 21 to have insufficient supporting force and be unable to face the light-transmitting tube. The inner peripheral surface 13 of the body 1 is elastically stretched out, so that the flexible circuit board 21 has good bendability.

It should be noted that, in the first embodiment, the lead portions 214 are arranged vertically and horizontally, but in practice, as long as the purpose of electrically connecting the light-emitting elements 22 can be achieved, the conductive layer 212 is arranged in a manner There are many, and it is not limited to the aspect of the first embodiment. In addition, as long as the purpose of uniformly reducing the overall structural strength of the flexible circuit board 21 can be achieved, the supporting parts 215 are arranged in a matrix, for example, but not limited to, the shape of each supporting part 215 is, for example, but not limited to a rectangle, and the holes 216 are, for example, However, it is not limited to being arranged in a grid, and may also be other geometric lines or patterns.

The flexible circuit board 21 also includes two opposite sides 219 along the peripheral direction of the light-transmitting tube body 1 , and the flexible circuit board 21 abuts against the sides 219 so as to be elastically stretched out on the inner circumference. The tubular shape of the surface 13 (as shown in Figure 7).

Referring to FIGS. 1 , 2 and 3 , the end caps 3 are detachably inserted and positioned on the nozzle portions 12 , and are made of elastic soft materials, such as but not limited to silicone and rubber. Each of the end caps 3 includes a cover portion 31 that covers the corresponding mouthpiece portion 12 and closes the mouthpiece portion 12 , and a cover portion 31 that is connected to the cover portion 31 and can be constricted by the mouthpiece portion 12 . The air-tight plug is installed in the corresponding plug portion 32 in the nozzle portion 12 . One of the cover portions 31 has two through holes 33 disposed at intervals and axially penetrating, and through which the power cables 24 pass.

When assembling the light-emitting device of the present invention, the assembler curls the flexible circuit board 21 , and then inserts it into the light-transmitting tube body 1 . When the assembler releases the flexible circuit board 21 , the flexible circuit board 21 will be stretched outward by its own elastic force, so that the light-emitting elements 22 abut against the inner peripheral surface 13 (as shown in FIG. 7 ). Next, the control circuit board 23 is placed in the space defined by the curved inner side of the flexible circuit board 21 , and the power lines 24 are passed through the through holes 33 of the one end cover 3 . The end caps 3 are sleeved on the nozzle portions 12 to complete the assembly.

It should be added that in the first embodiment, the flexible circuit board 21 is bent into a tubular shape with the sides 219 facing each other, but in other embodiments of the present invention, the flexible circuit board 21 is also According to practical application requirements, the side edges 219 can be designed to be arc-shaped (as shown in FIG. 8 ), or the flexible circuit board 21 can be designed to be opposite to each other along the peripheral direction of the light-transmitting tube body 1 . The two sides of the tube are stacked against each other (as shown in Figures 9 and 10).

Referring to FIGS. 11 and 12 , the structure of a second embodiment of the light-emitting device of the present invention is substantially the same as that of the first embodiment, and the difference is that the light-emitting device of the present invention further includes two sets of two respectively sleeved outside the nozzle portions 12 and The heat shrinkable sleeves 4 are respectively wrapped around the end caps 3 to achieve better waterproof effect. For the convenience of description, only the differences between the embodiments will be described below.

The assembly steps of the second embodiment are substantially the same as those of the first embodiment, except that after the assembly steps of the first embodiment are completed, each of the heat shrinkable sleeves 4 is wrapped around the corresponding end cap 3 and the corresponding end cap 3 Outside the nozzle portion 12 , each heat shrinkable sleeve 4 is wrapped around the corresponding end cap 3 and the nozzle portion 12 through heat treatment, and the assembly is completed.

Referring to FIGS. 5 , 6 and 13 , the structure of a third embodiment of the light-emitting device of the present invention is substantially the same as that of the first embodiment, and the difference lies in the structure design of the flexible circuit board 21 . For the convenience of description, only the differences between the embodiments will be described below.

In the third embodiment, the flexible circuit board 21 includes a base layer 211 , a conductive layer 212 disposed on one side of the base layer 211 , and a conductive layer 212 disposed on the opposite side of the base layer 211 . protective layer 213 . The conductive layer 212 has a lead portion 214 arranged vertically and horizontally for electrically connecting the light-emitting elements 22 , and a plurality of support portions 215 arranged in a matrix. Each of the supporting portions 215 is rectangular and spaced apart from the conductive portion 214 , and has a plurality of holes 216 arranged in a grid.

The flexible circuit board 21 also includes a board portion 217 having two opposite sides 219 along the peripheral direction of the light-transmitting tube body 1 , and two sides 219 radially inward from the light-transmitting tube body 1 , respectively. Each of the protruding abutting portions 218 is elongated along the lengthwise direction of the respective side edges 219 . The plate body portion 217 is provided for the electrical connection of the light-emitting elements 22 , and the abutting portions 218 abut against each other along the peripheral direction of the light-transmitting tube body 1 , so as to ensure that the plate body portion 217 is elastically outwardly stretched in a tubular shape ( As shown in Figures 14 and 15).

In conclusion, through the design that the conductive layer 212 has the supporting portions 215 and each of the supporting portions 215 has the holes 216, the overall structural strength of the flexible circuit board 21 can be reduced, so that the flexible circuit board 21 The flexible circuit board 21 can be smoothly bent to facilitate assembly, and at the same time, the flexible circuit board 21 can be prevented from being dented and affecting the service life. Furthermore, through the design that the flexible circuit board 21 is elastically arranged on the light-transmitting tube body 1, the overall structure of the light-emitting device of the present invention is simple and convenient to assemble and disassemble, and when the light-emitting module 2 is damaged, it can be directly The replacement from the light-transmitting tube body 1 is more environmentally friendly, and at the same time, the replacement cost can be reduced. In addition, through the design of the light-transmitting tube body 1 including the nozzle portions 12 extending coaxially opposite to each other from both ends of the tube body portion 11 and gradually reducing in diameter, the plug portions 32 of the end caps 3 can be The nozzles 12 are respectively embedded and positioned, which greatly increases the tightness and is not easy to fall off, which is a rather innovative and practical creation, and thus can indeed achieve the purpose of the present invention.

However, the above are only examples of the present invention, and should not limit the scope of implementation of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the patent specification are still included in the scope of the present invention. within the scope of the invention patent.

1: Light-transmitting tube body 11: Tube body 12: Nozzle 13: Inner peripheral surface 2: Lighting module 21: Flexible circuit board 211: Grassroots 212: Conductive layer 213: Protective Layer 214: Lead wire 215: Support Department 216: Hole 217: Board Body 218: Abutment 219: Side 22: Lighting pieces 23: Control circuit board 24: Power cord 3: End cap 31: Cover 32: Plug Department 33: Perforation 4: Heat shrinkable sleeve

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is an incomplete perspective view illustrating a first embodiment of a light-emitting device of the present invention; Figure 2 is a fragmentary exploded perspective view illustrating the first embodiment; Fig. 3 is an incomplete side sectional view illustrating a situation in which an end cap of the first embodiment is plugged at a nozzle; 4 is an incomplete perspective view illustrating a state in which a light-emitting module of the first embodiment has not been assembled into a light-transmitting tube body; FIG. 5 is an incomplete cross-sectional view illustrating the structure of a flexible circuit board of the first embodiment; 6 is an incomplete top view illustrating a conductive layer and a plurality of light-emitting elements of the flexible circuit board of the first embodiment; 7 is a cross-sectional view illustrating a state in which the flexible circuit board of the first embodiment is elastically outwardly stretched toward an inner peripheral surface of the light-transmitting tube body in a tubular shape; FIG. 8 is a cross-sectional view illustrating a state in which the flexible printed circuit board of the first embodiment is elastically stretched out toward the inner peripheral surface in an arc shape; 9 is a cross-sectional view illustrating a state in which the two sides of the flexible circuit board of the first embodiment are superimposed on each other and are elastically outwardly stretched toward the inner peripheral surface in a tubular shape; 10 is an incomplete cross-sectional view illustrating a state in which the side portions of the flexible circuit board of the first embodiment are stacked on each other; FIG. 11 is an incomplete perspective view illustrating a second embodiment of the light-emitting device of the present invention; Fig. 12 is an incomplete side sectional view illustrating the situation in which an end cap of the second embodiment is plugged at a nozzle portion and covered by a heat shrinkable sleeve; 13 is an incomplete perspective view illustrating a state in which a light-emitting module of a third embodiment of the light-emitting device of the present invention has not been assembled into a light-transmitting tube body; 14 is a cross-sectional view illustrating a state in which a flexible circuit board of the third embodiment is elastically outwardly stretched toward an inner peripheral surface of the light-transmitting tube body in a tubular shape; and FIG. 15 is an incomplete cross-sectional view illustrating a state in which the two abutting portions of the third embodiment abut against each other.

21: Flexible circuit board 212: Conductive layer 214: Lead wire 215: Support Department 216: Hole 22: Lighting pieces

Claims (9)

A light-emitting device, comprising: a light-transmitting tube body; and a light-emitting module, including a flexible circuit board disposed in the light-transmitting tube body, and a plurality of light-emitting components electrically connected to the flexible circuit board, the flexible circuit board The circuit board includes a base layer, a conductive layer arranged on one side of the base layer, and a protective layer arranged on the side of the conductive layer opposite to the base layer, the conductive layer has a configuration for the electrical connection of the light-emitting elements the lead part, and several support parts, each of which has several holes. The light-emitting device of claim 1, wherein the supporting parts are arranged in a matrix. The light-emitting device of claim 2, wherein the holes are arranged in a grid. The light-emitting device of claim 3, wherein each of the supporting portions is rectangular. The light-emitting device according to claim 1, wherein the light-transmitting tube body has an inner peripheral surface, the flexible circuit board is elastically outwardly stretched toward the inner peripheral surface, and the light-emitting elements are arranged on the arc of the flexible circuit board Bend the outer surface and abut against the inner peripheral surface. The light-emitting device as claimed in claim 5, wherein the flexible circuit board has two opposite sides along the peripheral direction of the light-transmitting tube body, and the flexible circuit board abuts against each other with the sides and stretches elastically Tubular on the inner peripheral surface. The light-emitting device according to claim 5, wherein the flexible circuit board further comprises a board body portion having two opposite sides along the peripheral direction of the light-transmitting tube body, and two abutting portions protruding radially inward from the side edges of the light-transmitting tube body, and the abutting portions abut against each other along the peripheral direction of the light-transmitting tube body. The light-emitting device as claimed in claim 5, wherein the light-transmitting tube body comprises a tube body portion having the inner peripheral surface, and two tubes extending coaxially opposite to each other from both ends of the tube body portion and gradually reducing in diameter. The light-emitting device further includes two detachable end caps which are respectively embedded and positioned on the nozzles. The light-emitting device according to claim 8, further comprising two heat-shrinkable sleeves, each of the heat-shrinkable sleeves is wrapped around the correspondingly combined end cap and the nozzle portion.

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