Flexible filament and lamp adopting same

Abstract

The utility model discloses a flexible filament and a lamp using the same, the flexible filament comprises a plurality of flexible filaments, each flexible filament comprises a flexible substrate and an LED chip, the flexible substrate is provided with a conductive circuit layer, and the plurality of LED chips distributed on the flexible substrate are connected in series and in parallel through the conductive circuit layer; the spliced lamp filament is sleeved with at least one layer of light-transmitting heat-shrinkable sleeve in the length direction of the spliced lamp filament, and the light-transmitting heat-shrinkable sleeve wraps the spliced lamp filament after being subjected to heat shrinkage. The light-transmitting heat-shrinkable sleeve is sleeved outside the whole flexible lamp filament, so that the problems that the long lamp filament is flexible, poor in tensile resistance and easy to break after being stressed are solved; and tensile strength is provided for the ultra-long flexible splicing lamp filament.

Description

Technical Field

[0001] The utility model relates to the technical field of super-long flexible filaments, in particular to a flexible filament and a lamp using the flexible filament. Background Art

[0002] At present, LED filament lamps mostly use flexible filaments as light-emitting elements. Flexible filaments use HVLED technology, and multiple flip-chip LED flip chips are connected in series to form HVLEDs modules, which have the advantages of low temperature and low energy consumption. Flexible filaments use copper foil laminated polymer film as the base material. They are slender, soft and plastic. They can be bent into different shapes and provide different types of decorative lamps, so they are widely favored by consumers. At present, there is no set of packaging equipment to realize the packaging and production of ultra-long filaments. Especially when it is necessary to obtain flexible filaments of different specifications and lengths, it is impossible to directly complete and obtain the flexible filaments of the specification size through the packaging equipment, that is, the corresponding packaging equipment can encapsulate and produce flexible filaments of fixed specifications and lengths. If the flexible filament cannot meet the use requirements, it can only be connected in series through a series module. The method of splicing several filaments in series leads to a large gap between two adjacent filaments, which affects the continuity of the flexible filament. That is, the simultaneous connection of several filaments in series cannot achieve continuous filament light emission, and there will be interruptions.

[0003] Currently, there is no packaging equipment for preparing ultra-long flexible filaments on the market, and the gold plating, printing, and patching processes on flexible PCB boards require professional equipment and technology. Customized equipment will greatly increase production costs. And due to the length of the flexible filament, the long filament has poor tensile strength and is easily broken after being stressed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a flexible filament, which solves the problem that the existing filaments cannot be packaged and manufactured into super-long filaments and the super-long filaments tend to have poor tensile strength.

[0005] The utility model is realized through the following technical solutions.

[0006] The utility model discloses a flexible filament, comprising a light-transmitting heat-shrinkable sleeve and a plurality of filament bodies, wherein at least one filament body is inserted into the light-transmitting heat-shrinkable sleeve, and the light-transmitting heat-shrinkable sleeve is subjected to heat shrinkage and coated on a single filament body or a plurality of stranded filament bodies to form an integrated structure; each filament body comprises a flexible substrate and an LED chip, a conductive circuit layer is arranged along the length direction of the flexible substrate, a plurality of LED chips distributed on the flexible substrate are electrically connected by the conductive circuit layer to form a light source module, and a light-transmitting adhesive layer is coated on the front and back surfaces of the flexible substrate, and the light-transmitting adhesive layer covers the light source module on the corresponding side thereof.

[0007] Furthermore, the light-transmitting heat shrinkable tube is a single-layer or multi-layer tube structure.

[0008] Furthermore, the filament body is a spliced ​​filament, which includes a plurality of filament segments, on which a conductive circuit layer is arranged along the length direction, and a plurality of LED chips distributed on the flexible substrate are electrically connected by the conductive circuit layer; the head end and the tail end of each filament segment are respectively provided with conductive connection ends electrically connected to the conductive circuit layer and extending to both ends thereof, and each adjacent filament segment is electrically spliced ​​by the relative conductive connection ends.

[0009] Furthermore, at least one welding hole is provided on the conductive connection end, and each adjacent two filament segments are overlapped by the welding holes on the opposite conductive connection ends, and then fixed by soldering in the overlapped welding holes to form an electrical splicing.

[0010] Furthermore, a light-transmitting adhesive is coated and cured at the splicing position between two adjacent filament segments, so that the filament segments are spliced ​​in sequence to form an integrated splicing structure.

[0011] Furthermore, the light-transmitting heat shrinkable tube is a transparent tube, a colored tube, a fluorescent tube or a frosted tube.

[0012] Furthermore, the light-transmitting heat shrink tubing is a Teflon heat shrink tubing, a PFA heat shrink tubing, a PVC heat shrink tubing, a polyester heat shrink tubing or a silicone heat shrink tubing.

[0013] Furthermore, a first contact piece electrically connected to the conductive circuit layer is provided at the head end of the first filament segment, and a second contact piece electrically connected to the conductive circuit layer is provided at the tail end of the last filament segment.

[0014] Furthermore, a plurality of light source modules are distributed on the flexible substrate, and the light source modules include one or more of a red light source module, a green light source module, a blue light source module, a cold white light source module and a warm white light source module.

[0015] A lamp using the flexible filament comprises a light-transmitting carrier, wherein the flexible filament is arranged in the light-transmitting carrier, and pins at one end or both ends of the flexible filament are electrically connected to a built-in or external power source.

[0016] The beneficial effects of the utility model are as follows: a light-transmitting heat-shrinkable sleeve is provided on the outer jacket of the overall flexible filament, so as to avoid the problem that the long filament is easily broken due to its poor tensile strength and being stressed;

[0017] By covering the overall flexible filament with a light-transmitting heat shrink tubing, the tensile strength of the filament is significantly enhanced. This solves the problem that the long filament is easily broken after being stressed due to its poor tensile strength. After the light-transmitting heat shrink tubing shrinks due to heat, it tightly wraps around the filament to form a protective structure, thereby enhancing the tensile strength and overall strength of the filament.

[0018] By overlapping and fixing through the welding holes on the conductive connection ends, several flexible filaments are combined into a long flexible filament, and the glue is filled and solidified in the splicing gap, so that two adjacent flexible filaments form a continuous whole. This method avoids the formation of light-breaking shadows at the splicing point of the long flexible filament, thereby improving the continuity of light emission, and by setting a transparent heat shrink tubing, the overall tensile resistance and overall strength of the filament are further enhanced, avoiding the spliced ​​filament from being pulled apart at the splicing position. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0021] Figure 2 yes Figure 1 A cross-sectional view of

[0022] Figure 3 This is a schematic diagram of the structure of the second embodiment of the utility model Figure 1 ;

[0023] Figure 4 yes Figure 2 A cross-sectional view of

[0024] Figure 5 This is a schematic diagram of the structure of the second embodiment of the utility model Figure 2 ;

[0025] Figure 6 It is a schematic diagram of the structure of the unjoined package of Example 2 of the utility model;

[0026] Figure 7 yes Figure 6 Schematic diagram of the structure after splicing;

[0027] Figure 8 yes Figure 7 A partial enlarged view of .

[0028] Fig. 9 is a schematic diagram of the structure of a lamp in which the light-transmitting carrier is a bulb in Example 6;

[0029] Fig.10 It is a schematic diagram of the lamp structure in which the light-transmitting carrier is a light-transmitting cover in Example 6. DETAILED DESCRIPTION

[0030] Combine the following Figure 1-10The utility model is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front and back directions mentioned below are the same as Figure 1 The up-down, left-right, front-back directions of the projection relationship itself are consistent.

[0031] Embodiment 1:

[0032] Combined with Figure 1-2 The flexible filament comprises a light-transmitting heat shrinkable tube 1 and a plurality of filament bodies 2, wherein at least one filament body 2 is inserted into the light-transmitting heat shrinkable tube 1, and the light-transmitting heat shrinkable tube 1 is subjected to heat shrinkage and wrapped around a single filament body 2 or a plurality of stranded filament bodies 2 to form an integrated structure; each filament body 2 comprises a flexible substrate 21 and an LED chip 22, wherein the flexible substrate 21 is provided with a conductive circuit layer 23 along its length direction, and a plurality of LED chips 22 distributed on the flexible substrate are electrically connected by the conductive circuit layer 23 to form a light source module, and a light-transmitting adhesive layer 24 is coated on the front and back surfaces of the flexible substrate 21, and the light-transmitting adhesive layer 24 covers the light source module on the corresponding side. The light-transmitting heat shrinkable tube 1 is a single-layer or multi-layer tube structure. The two ends of the flexible substrate 21 are provided with conductive connection ends 25 electrically connected to the light source module; and the first end of the filament body 2 is provided with a first contact piece 27 electrically connected to the conductive circuit layer 25, and the end of the filament body 2 is provided with a second contact piece 28 electrically connected to the conductive circuit layer 25.

[0033] Embodiment 2:

[0034] Combined with Figure 3-8 The filament body 2 is a spliced ​​filament, which includes a plurality of filament segments 20. A conductive circuit layer 23 is arranged on the filament segment 20 along its length direction. A plurality of LED chips 22 distributed on a flexible substrate 21 are electrically connected to a light source module by the conductive circuit layer 23. A light-transmitting adhesive layer 24 is coated on the front and back surfaces of the flexible substrate 21. The head and the tail of each filament segment 20 are respectively provided with a conductive connection end 25 electrically connected to the conductive circuit layer 23 and extending to both ends thereof. Each adjacent filament segment 20 is electrically spliced ​​by the opposite conductive connection ends 25.

[0035] At least one welding hole (not marked in the figure) is provided on the conductive connection end 25, and each adjacent filament segment is overlapped by the welding holes on the opposite conductive connection ends, and then soldered in the overlapped welding holes to form an electrical splicing. Multiple flexible filaments are overlapped and fixed through the welding holes of the conductive connection ends to obtain a long flexible filament, the length of which can be changed according to the usage scenario, which is simple and convenient. The splicing position between the adjacent two filament segments 20 is coated and cured with a light-transmitting glue 26, so that each filament segment 20 is spliced ​​in sequence to form an integrated splicing structure.

[0036] The light-transmitting heat shrinkable tube 1 is a transparent tube, a colored tube, a fluorescent tube or a frosted tube. The light-transmitting heat shrinkable tube 1 is a Teflon heat shrinkable tube, a PFA heat shrinkable tube, a PVC heat shrinkable tube, a polyester heat shrinkable tube or a silicone heat shrinkable tube.

[0037] The first end of the first filament segment 20 is provided with a first contact piece 27 electrically connected to the conductive circuit layer 25, and the end of the last filament segment 20 is provided with a second contact piece 28 electrically connected to the conductive circuit layer 25. The first contact piece 27 and the second contact piece 28 are connected to a power source to form a loop, so that the LED chip can be lit, thereby making the flexible filament light up.

[0038] Through the above technical solutions, combined with Figure 3-8 When splicing long flexible filaments, taking the splicing of three flexible filaments as an example, the splicing of the three flexible filaments: the first flexible filament retains the first contact piece 27 at the head end, and the second contact piece 28 at the end is cut off, retaining the conductive circuit layer 23 and the conductive connection end 25; the second flexible filament cuts off the first contact piece 27 and the second contact piece 28 at both ends, and only retains the conductive circuit layer 23 and the conductive connection end 25 connected to the two ends of the conductive circuit layer 23; the third flexible filament cuts off the first contact piece 27 at the head end, retains the conductive circuit layer 23, the conductive connection end 25 and the second contact piece 28, and then overlaps and fixes them through the welding hole of the conductive connection end 25, overlaps and fixes the three flexible filaments and completes the electrical connection, and then supplements the fluorescent glue at the connection position, and the splicing of the long flexible filaments is completed.

[0039] When more than three flexible filaments need to be spliced, the cutting method of the first and last flexible filaments remains unchanged, and only the number of middle flexible filaments needs to be increased, and then overlapped and fixed, so that more than three long flexible filaments can be spliced.

[0040] Embodiment 3:

[0041] The difference between Example 2 and Example 1 is that one end of the flexible filament is provided with a first contact piece 27 and a second contact piece 28 electrically connected to the conductive circuit layer 23, and the first contact piece 27 and the second contact piece 28 are located on the same side.

[0042] When splicing long flexible filaments, the end of the first flexible filament is cut off, and the first contact piece and the second contact piece at the head end are retained, and the conductive circuit layer 23 and the conductive connection end 25 are retained; the first contact pieces 27 and the second contact pieces 28 at both ends of the second flexible filament are completely cut off, and only the conductive circuit layer 23 and the conductive connection ends 25 connected at both ends of the conductive circuit layer 23 are retained; the first contact piece 27 and the second contact piece 28 at the head end of the third flexible filament are cut off, and the conductive circuit layer 23 and the conductive connection end 25 are retained, and then the conductive connection end 25 is overlapped and fixed through the welding hole of the conductive connection end 25, the three flexible filaments are overlapped and fixed to complete the electrical connection, and then fluorescent glue is added at the connection position to complete the splicing of the long flexible filaments.

[0043] Example 4

[0044] Based on Example 3, when the end of the filament does not need to be electrically connected, the end of the last flexible filament serves as a connecting end or a vacant end. The connecting end or the vacant end is defined as a connecting part that needs to form a non-electrical connection with an external device, such as by setting magnetic beads or iron beads as functional components of the magnetic lamp.

[0045] Example 5

[0046] LED chips and a conductive circuit layer 23 are arranged on the front and back sides of the flexible substrate. A plurality of LED chips distributed on the front and back sides of the flexible substrate are connected in series and in parallel by the conductive circuit layer. The LED chips respectively include one or more groups of red light source modules, green light source modules, blue light source modules, cold white light source modules and warm white light source modules. The components arranged on the front and back sides of the flexible substrate have the same structure. After the long flexible filaments are formed by splicing and covered with fluorescent glue, the long flexible filaments formed can emit light on both sides at the same time, and no dead angle of the light source is generated. The effect of the flexible filaments is better.

[0047] Example 6

[0048] As shown in Figures 9-10, a lamp using the flexible filament includes a light-transmitting carrier, in which the flexible filament is arranged, and the pins at one end or both ends of the flexible filament are electrically connected to a built-in or external power supply; the light-transmitting carrier includes a bulb or a light-transmitting cover.

[0049] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology in this field to understand the content of the utility model and implement it, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A flexible filament, characterized in that: The invention comprises a light-transmitting heat-shrinkable tube and a plurality of filament bodies, wherein at least one filament body is inserted into the light-transmitting heat-shrinkable tube, and the light-transmitting heat-shrinkable tube is subjected to heat shrinkage and coated on a single filament body or a plurality of stranded filament bodies to form an integrated structure; each filament body comprises a flexible substrate and an LED chip, a conductive circuit layer is arranged on the front and / or back of the flexible substrate along its length direction, a plurality of LED chips distributed on the flexible substrate are electrically connected by the conductive circuit layer to form a light source module, and a light-transmitting adhesive layer is coated on the front and back of the flexible substrate, and the light-transmitting adhesive layer covers the light source module on the corresponding side thereof.

2. The flexible filament according to claim 1, characterized in that: The light-transmitting heat-shrinkable tube is a single-layer or multi-layer tube structure.

3. The flexible filament according to claim 1, characterized in that: The filament body is a spliced ​​filament, which includes a plurality of filament segments, on which a conductive circuit layer is arranged along the length direction, and a plurality of LED chips distributed on a flexible substrate are electrically connected by the conductive circuit layer; the head end and the tail end of each filament segment are respectively provided with conductive connection ends electrically connected to the conductive circuit layer and extending to the two ends thereof, and each adjacent filament segment is electrically spliced ​​by the relative conductive connection ends.

4. The flexible filament according to claim 3, characterized in that: At least one welding hole is provided on the conductive connection end, and two adjacent filament segments are overlapped through the welding holes on the opposite conductive connection ends, and then fixed by soldering in the overlapped welding holes to form an electrical splicing.

5. The flexible filament according to claim 3, characterized in that: The joint positions between two adjacent filament segments are coated with and cured with fluorescent glue, so that the flexible filaments are sequentially joined to form an integrated joint structure.

6. The flexible filament according to claim 1 or 2, characterized in that: The light-transmitting heat-shrinkable tube is a transparent tube, a colored tube, a fluorescent tube or a frosted tube.

7. The flexible filament according to claim 1, characterized in that: The light-transmitting heat shrinkable tube is a Teflon heat shrinkable tube, a PFA heat shrinkable tube, a PVC heat shrinkable tube, a polyester heat shrinkable tube or a silicone heat shrinkable tube.

8. The flexible filament according to claim 3, characterized in that: A first contact piece electrically connected to the conductive circuit layer is disposed at the head end of the first filament segment, and a second contact piece electrically connected to the conductive circuit layer is disposed at the tail end of the last filament segment.

9. The flexible filament according to claim 1, characterized in that: A plurality of light source modules are distributed on the flexible substrate, and the light source modules include one or more of a red light source module, a green light source module, a blue light source module, a cold white light source module and a warm white light source module.

10. A lamp using the flexible filament according to any one of claims 1 to 9, characterized in that: It comprises a light-transmitting carrier, in which the flexible filament is arranged, and pins at one end or both ends of the flexible filament are electrically connected to a built-in or external power source.

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