A flexible LED light strip, connecting conductor, and connecting conductor array

Abstract

The present invention discloses a flexible LED light strip and a connecting conductor and a connecting conductor array. The flexible LED light strip comprises a wire array, a plurality of flexible circuit board units and a connecting conductor. The wire array comprises a wire and an insulating layer, and a notch is provided on the insulating layer to expose the wire. An LED element is welded on the front side of the flexible circuit board unit, and the back side faces the wire array. A positive electrode pin and a negative electrode pin are led out from the end of each flexible circuit board unit, and the positive electrode pin and the negative electrode pin are respectively fixed on the corresponding exposed wire through the connecting conductor. The connecting conductor comprises a plug-in portion, and claw portions are provided at both ends of the plug-in portion. The claw portions connect the positive electrode pin and the negative electrode pin to the corresponding exposed wire through crimping, so that the electrical connection of two adjacent flexible circuit board units, the connecting conductor and the wire array can be achieved without welding, so that the flexible circuit board unit can be prevented from being damaged by high temperature during welding. The connection method is simple and convenient, and production efficiency can be improved.

Description

Technical Field

[0001] The invention relates to a flexible LED light strip, a connecting conductor and a connecting conductor array. Background Art

[0002] The existing flexible LED light strip includes a wire array, a plurality of flexible circuit board units and a covering layer. The wire array includes two flat wires arranged side by side at intervals; the plurality of flexible circuit board units are arranged along the length direction of the wire array, each flexible circuit board unit is printed with an LED circuit, and a plurality of LED components are welded on the front side, the back side of the flexible circuit board unit faces the wire array, and the ends of the flexible circuit board unit are provided with positive and negative electrode welding points of the LED circuit, and the positive and negative electrode welding points are welded and fixed on the corresponding flat wires; the covering layer covers the wire array, the plurality of flexible circuit board units and the plurality of LED components.

[0003] In order to achieve better lighting effects, it is often necessary to connect a variety of flexible LED light strips of different colors to each other. The existing connection method of two independent flexible LED light strips is as follows: a cutting position for cutting is provided between two adjacent flexible circuit board units, and a connecting conductor is provided on the cutting position. The two ends of the connecting conductor are respectively welded and fixed on the two adjacent flexible circuit board units, and the two ends of the connecting conductor are respectively electrically connected to the two adjacent flexible circuit board units. When in use, the flexible circuit board unit is first cut at the cutting position according to the required length. After cutting, multiple independent flexible LED light strip bodies are arranged, and the two ends of the pin are respectively inserted into the hollow columns of the two adjacent flexible LED light strip bodies to electrically connect the two flexible LED light strip bodies.

[0004] However, the above-mentioned flexible LED light strip structure has the following disadvantages: since the positive and negative electrode soldering points of several flexible circuit board units are fixed on the corresponding flat wires by welding, the two ends of the connecting conductor are respectively welded and fixed on two adjacent flexible circuit board units, that is, the flexible LED light strip is connected by welding during production. Since high-temperature operation is required during welding, the flexible circuit board unit is easily damaged by high temperature, and the welding method is cumbersome and complicated, resulting in low production efficiency. In addition, since the flat wire is thin, it is easily broken at the junction with the soldering point as the light strip is flipped and twisted, and the light strip is easily scrapped. Summary of the invention

[0005] The present invention provides a flexible LED light strip and a connecting conductor and a connecting conductor array, which are used to solve the technical problems in the prior art that a flexible circuit board unit, a wire array and a connecting conductor are all connected by welding, and since high-temperature operation is required during welding, the flexible circuit board unit is easily damaged by high temperature, and the welding method is cumbersome and complicated, resulting in low production efficiency.

[0006] The technical solution of the present invention is achieved in this way:

[0007] The present invention provides a flexible LED light strip, comprising:

[0008] A long strip-shaped conductor array, the conductor array comprising at least two conductors spaced apart and arranged side by side and an insulating layer wrapped around the surface of the conductors, each conductor extending along the length direction of the conductor array, and a notch is provided on the insulating layer to expose the conductor;

[0009] A plurality of flexible circuit board units are arranged at intervals along the length direction of the wire array, each flexible circuit board unit is printed with an LED circuit, a plurality of LED components are welded on the front side of the flexible circuit board unit, the back side of the flexible circuit board unit faces the wire array, and an electrode pin of the LED circuit is led out at the end of each flexible circuit board unit;

[0010] A plurality of connecting conductors, wherein the connecting conductors include an inserting portion and a clamping claw portion for inserting, wherein the clamping claw portion fixes itself and the electrode pin to the exposed position of the corresponding wire by crimping, so that the connecting conductor forms an electrical connection with the electrode pin and the wire.

[0011] Preferably, the flexible circuit board unit comprises a metal foil layer and a covering layer covering the surface of the metal foil layer, the surface of the covering layer is provided with a window for welding the LED element, and the electrode pins are obtained by etching the metal foil layer.

[0012] Preferably, a reinforcement layer is provided on the surface of the electrode pin.

[0013] Preferably, the reinforcement layer is a tin foil layer.

[0014] Preferably, it further comprises a covering layer, which extends along the length direction of the wire array and covers the wire array, the flexible circuit board unit, the plurality of LED elements and the connecting conductors.

[0015] Preferably, the plug-in portion and the claw portion of the connecting conductor are formed from a piece of metal sheet.

[0016] Preferably, the plug-in portion of the connecting conductor is in the shape of a hollow column, and the plug-in portion has a notch in the middle.

[0017] Preferably, at least two connecting conductors are arranged side by side at a predetermined distance and are fixedly restrained by a conductor restraining portion formed of an insulator to form a connecting conductor array.

[0018] Preferably, there are two claw parts, which are respectively arranged at two ends of the plug-in part.

[0019] A connecting conductor comprises an inserting part and a clamping claw part for inserting, wherein the inserting part and the clamping claw part of the connecting conductor are formed by a piece of metal sheet.

[0020] Preferably, the plug-in portion of the connecting conductor is in the shape of a hollow column, and the plug-in portion has a notch in the middle.

[0021] Preferably, there are two claw parts, which are respectively arranged at two ends of the plug-in part.

[0022] A connecting conductor array comprises at least two connecting conductors and a conductor restraining portion formed by an insulator. The at least two connecting conductors are arranged side by side at a predetermined distance and fixedly restrained by the conductor restraining portion to form a connecting conductor array. The connecting conductor is the connecting conductor described above.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] Through the above scheme, the connecting conductor is fixedly connected to the electrode pin by crimping through the claw part to the exposed position of the corresponding wire, so that the connecting conductor is electrically connected to the electrode pin and the wire, and because the claw parts are respectively arranged at both ends of the plug-in part, the connecting conductor can also realize the electrical connection of two adjacent flexible circuit board units. The scheme has a simple structure and can realize the electrical connection of two adjacent flexible circuit board units, the connecting conductor and the wire without welding. The wire is not easy to break at the connection with the flexible circuit board unit and the connecting conductor, which avoids the flexible circuit board unit being easily damaged by high temperature due to the need for high temperature operation during welding. The connection method of the scheme is simple and convenient, which can improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the three-dimensional structure of a flexible LED light strip provided in Embodiment 1 of the present invention;

[0026] Figure 2 A schematic diagram of the exploded structure of the flexible LED light strip provided in the first embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the three-dimensional structure of the flexible LED light strip provided in the first embodiment of the present invention from another angle;

[0028] Figure 4 A schematic diagram of the three-dimensional structure of a flexible circuit board unit provided in Embodiment 1 of the present invention;

[0029] Figure 5 A schematic diagram of the exploded structure of a flexible circuit board unit provided in Embodiment 1 of the present invention;

[0030] Figure 6 A schematic diagram of the three-dimensional structure of a connecting conductor provided in Embodiment 1 of the present invention;

[0031] Figure 7A schematic diagram of the three-dimensional structure of a flexible LED light strip provided in the second embodiment of the present invention;

[0032] Figure 8 A schematic diagram of the exploded structure of a flexible LED light strip provided in Embodiment 2 of the present invention;

[0033] Fig. 9 A schematic diagram of the three-dimensional structure of a flexible LED light strip provided in Embodiment 3 of the present invention;

[0034] Fig.10 A schematic diagram of the three-dimensional structure of a connecting conductor provided in Embodiment 3 of the present invention;

[0035] Fig.11 This is a schematic diagram of the three-dimensional structure of a flexible circuit board unit provided in accordance with a fourth embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiment 1:

[0038] like Figures 1 to 3 As shown, the present embodiment provides a flexible LED light strip, including a long strip-shaped wire array 1, a plurality of flexible circuit board units 2, a plurality of connecting conductors 4 and a covering layer 5, wherein the wire array 1 includes two wires 11 arranged side by side at intervals and an insulating layer 12 wrapped around the surface of the wire 11, the wire 11 is a multi-strand wire, each wire 11 extends along the length direction of the wire array 1, and a notch 121 for exposing the wire 11 is opened on the insulating layer 12; a plurality of flexible circuit board units 2 are arranged at intervals along the length direction of the wire array 1, each flexible circuit board unit 2 is printed with an LED circuit, and the flexible circuit board unit 2 is provided with a plurality of connecting conductors 4 and a covering layer 5; A plurality of LED components 3 are welded on the front side, the back side of the flexible circuit board unit 2 faces the wire array 1, and a positive electrode pin 21 and a negative electrode pin 22 of the LED circuit are led out at the end of each flexible circuit board unit 2; the positive electrode pin 21 and the negative electrode pin 22 are respectively fixedly connected to the exposed position of the corresponding wire 11 through a connecting conductor 4, so that the connecting conductor 4 and the positive electrode pin 21, the negative electrode pin 22 and the wire 11 are electrically connected to each other; the covering layer 5 extends along the length direction of the wire array 1, covering the wire array 1, the flexible circuit board unit 2, the plurality of LED components 3 and the connecting conductor 4.

[0039] Preferably, each connecting conductor 4 includes a plug-in portion 41 and a claw portion 42 for plugging in. The claw portion 42 fixes itself and the positive and negative electrode pins 21 and 22 to the exposed positions of the corresponding wires 11 by crimping, so that the connecting conductor 4 is electrically connected to the positive electrode pin 21, the negative electrode pin 22 and the wire 11; further preferably, there are two claw portions 42, which are respectively arranged at the two ends of the plug-in portion 41.

[0040] Through the above scheme, the connecting conductor 4 is crimped by the claw portion 42 to fix itself and the positive and negative electrode pins 21, 22 to the exposed positions of the corresponding wires 11, so that the connecting conductor 4 and the positive and negative electrode pins 21, 22 are respectively electrically connected to the wires 11, and because the claw portions 42 are respectively arranged at both ends of the plug-in portion 41, the connecting conductor 4 can also realize the electrical connection of two adjacent flexible circuit board units 2. The scheme has a simple structure and can realize the electrical connection of two adjacent flexible circuit board units 2, the connecting conductor 4 and the wire 11 without welding. The wire is not easy to break at the connection with the flexible circuit board unit and the connecting conductor, which avoids the flexible circuit board unit 2 being easily damaged by high temperature due to the need for high temperature operation during welding. The connection method of the scheme is simple and convenient, which can improve production efficiency.

[0041] like Figure 4 and Figure 5 As shown, the flexible circuit board unit 2 includes a metal foil layer 23 and a covering layer 24 covering the surface of the metal foil layer 23. The surface of the covering layer 24 is provided with a window 241 for welding the LED element 3. The positive electrode pin 21 and the negative electrode pin 22 are obtained by etching the metal foil layer 23. The above structure is adopted to facilitate the crimping connection between the flexible circuit board unit 2 and the connecting conductor 4, and the electrical connection between the two adjacent flexible circuit board units 2, the connecting conductor 4 and the wire array 1 can be achieved without welding. In addition, no shear cut is required on the flexible circuit board unit 2 during production, which reduces the processing steps and saves processing time. In addition, since the positive electrode pin 21 and the negative electrode pin 22 are obtained by etching the metal foil layer 23, that is, the positive electrode pin 21 and the negative electrode pin 22 do not need to be connected to the flexible circuit board unit 2 by welding, so that the integrity of the flexible circuit board unit 2 is good, and the connection between the positive electrode pin 21 and the negative electrode pin 22 and the flexible circuit board unit 2 can be more stable and not easy to break, and the welding process is omitted, which can effectively improve production efficiency and reduce production costs. In this embodiment, the metal foil layer 23 is a copper foil layer with good electrical conductivity, and the metal foil layer 23 is a copper foil layer 23 .

[0042] A reinforcing layer 6 is provided on the surface of the positive electrode pin 21 and the negative electrode pin 22. Since the positive electrode pin 21 and the negative electrode pin 22 are obtained by etching the copper foil layer 23, and the copper foil layer 23 is ultra-thin, when realizing the electrical connection between two adjacent flexible circuit board units 2, the connecting conductor 4 and the wire array 1, the positive electrode pin 21 and the negative electrode pin 22 are easily pulled apart, and a reinforcing layer 6 is provided on the positive electrode pin 21 and the negative electrode pin 22 to reinforce the strength of the positive electrode pin 21 and the negative electrode pin 22 to prevent the positive electrode pin 21 and the negative electrode pin 22 from being easily pulled apart during connection and assembly.

[0043] The reinforcing layer 6 is a tin foil layer. Tin has good electrical conductivity, good welding properties, and good solderability, and is easier to be applied on the copper foil layer 23 .

[0044] The plug-in portion 41 and the claw portion 42 of the connecting conductor 4 are formed by bending a piece of metal sheet. The plug-in portion 41 is in the shape of a hollow column, which is convenient for elastically matching with the pin for installation. The structure is easy to produce, simple to make, and has a high yield rate. In addition, a shearing cut can be provided in the middle of the plug-in portion 41 to facilitate cutting the connecting conductor 4 and separating the two flexible circuit board units 2. Since there are two claw portions 42, which are respectively provided at both ends of the plug-in portion 41, even if the plug-in portion 41 is cut into two parts along the middle position, each can still be fixed by the claw portion 42 at the end.

[0045] In this embodiment, the metal sheet may be a copper sheet.

[0046] like Figure 6 As shown, in this embodiment, the claw portion 42 includes a conductor connecting piece 421 and connecting pressing pieces 422 respectively arranged on both sides of the conductor connecting piece 421, the connecting pressing pieces 422 are obtained by folding processing, the conductor connecting piece 421 is connected to the plug-in portion 41, the conductor connecting piece 421 is connected to the plug-in portion 41, the connecting pressing pieces 422 on both sides of the conductor connecting piece 421 are used to press and connect the positive and negative electrode pins and the corresponding exposed wires 11 on the conductor connecting piece 421, so that the connecting conductor 4 and the positive and negative electrode pins 21, 22 and the wire 11 are electrically connected to each other, the structure is simple, and it is easy to use.

[0047] Embodiment 2:

[0048] This embodiment improves the installation method of the connecting conductor 4 on the basis of the first embodiment. In the first embodiment, the connecting conductor 4 is installed individually on the pin, which is troublesome to install and inconvenient to produce. Therefore, this embodiment makes corresponding adjustments.

[0049] like Figure 7 and Figure 8As shown, specifically, in the present embodiment, a connecting conductor array is provided, which is composed of two connecting conductors 4 arranged side by side at a predetermined distance and fixedly constrained by a conductor restraint portion 7 formed by an insulator, thereby forming a connecting conductor array. During specific production, an injection molding machine can be used to mold the conductor restraint portion 7 on the two connecting conductors 4 arranged side by side at a predetermined distance to fix the two connecting conductors 4 to form a connecting conductor array. Specifically, the conductor restraint portion 7 is constrained at the position of the plug-in portion 41 of the connecting conductor 4, and the two connecting conductors 4 of the connecting conductor array are arranged side by side at a predetermined distance, so that the two connecting conductors 4 can be smoothly connected with the two wires 11 of the wire array that are arranged side by side at intervals. This facilitates the production of the connecting conductors, and can be effectively and quickly installed on the two wires 11 of the wire array that are arranged side by side at intervals, making the assembly of the light strip more convenient.

[0050] Of course, in some embodiments, the connecting conductor array is not limited to two connecting conductors 4, and may be three or more.

[0051] Embodiment three:

[0052] This embodiment improves the structure of the connecting conductor 4 on the basis of the first embodiment. Since the plug-in portion 41 of the connecting conductor 4 of the first embodiment is a hollow column structure, it is squeezed and cut off by external force during shearing. After shearing, the end face of the plug-in portion 41 is easily deformed. The deformed hollow column is inconvenient to plug and is easily damaged, making it inconvenient to connect the plug pin when inserting the hollow column, and it is more likely to affect the electrical connection effect. The electrical performance of the flexible LED light strip is unstable. Therefore, in this embodiment, the structure of the connecting conductor 4 in the first embodiment is improved. The structure of the connecting conductor 4 in this embodiment is as follows:

[0053] like Fig. 9 and Fig.10 As shown, the plug-in portion 41 of the connecting conductor in this embodiment is also designed to be a hollow column, and there is a notch 43 in the middle position of the plug-in portion as a shearing opening, so that the middle position of the plug-in portion 41 becomes thinner, which is easier to shear and less prone to errors, and the plug-in portion 41 will not be deformed by force during shearing and cause damage; after shearing, the two connectors can be plugged in independently, ensuring the electrical stability of the flexible LED light strip.

[0054] Embodiment 4:

[0055] This embodiment is an improvement on the flexible circuit board unit in the above embodiment. Specifically, Fig.11 As shown in FIG. 1 , as another embodiment, when manufacturing the flexible circuit board unit, a circuit board protrusion with an LED element can be designed at both ends of the flexible circuit board unit, and the circuit board protrusion is located between the positive electrode pin 21 and the negative electrode pin 22. Fig.11The protruding length of the protruding portion of the circuit board is half the length of the pin. This design is conducive to fully utilizing the space of the circuit board, making the brightness of the LED flexible circuit board brighter under the same length. Of course, in other embodiments, the protruding length of the protruding portion of the circuit board may not be limited by the length of the pin.

[0056] It should be noted that the conductors 11 constituting the conductor array are not limited to the two conductors described in the above embodiment, but may be three, four or more conductors. The metal foil layer 1 of the present invention is not limited to the copper foil layer in the above embodiment, but may also be other metal conductors such as aluminum foil.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flexible LED light strip, characterized in that: include: A long strip-shaped conductor array (1), the conductor array (1) comprising at least two conductors (11) arranged side by side at an interval and an insulating layer (12) wrapped around the surface of the conductors (11), each conductor (11) extending along the length direction of the conductor array (1), and a notch (121) for exposing the conductor (11) is provided on the insulating layer (12); A plurality of flexible circuit board units (2) are arranged at intervals along the length direction of the conductor array (1); an LED circuit is printed on each flexible circuit board unit (2); a plurality of LED components (3) are welded on the front side of the flexible circuit board unit (2); the back side of the flexible circuit board unit (2) faces the conductor array (1); and electrode pins (21, 22) of the LED circuit are led out from the end of each flexible circuit board unit (2); A plurality of connecting conductors (4), wherein the connecting conductors (4) comprise a plug-in portion (41) and a claw portion (42) for plugging in, wherein the claw portion (42) is fixedly connected to itself and the electrode pins (21, 22) to the exposed position of the corresponding wire (11) by means of crimping, so that the connecting conductor (4) is electrically connected to the electrode pins (21, 22) and the wire (11), and the plug-in portion (41) of the connecting conductor is in the shape of a hollow column, and the plug-in portion has a notch (43) at the middle position.

2. The flexible LED light strip according to claim 1, characterized in that: The flexible circuit board unit (2) comprises a metal foil layer (23) and a covering layer (24) covering the surface of the metal foil layer (23); a window (241) for welding an LED element (3) is provided on the surface of the covering layer (24); and the electrode pins (21, 22) are obtained by etching the metal foil layer (23).

3. The flexible LED light strip according to claim 2, characterized in that: A reinforcement layer (6) is provided on the surface of the electrode pins (21, 22).

4. The flexible LED light strip according to claim 3, characterized in that: The reinforcing layer (6) is a tin foil layer.

5. A flexible LED light strip according to claim 1 or 2 or 3 or 4, characterized in that: It also comprises a covering layer (5), which extends along the length direction of the wire array (1) and covers the wire array (1), the flexible circuit board unit (2), a plurality of LED elements (3) and the connecting conductor (4).

6. The flexible LED light strip according to claim 5, characterized in that: At least two connecting conductors (4) are arranged side by side at a predetermined distance and are fixedly restrained by a conductor restraining portion (7) formed of an insulator to form a connecting conductor array.

7. A flexible LED light strip according to claim 1 or 2 or 3 or 4, characterized in that: There are two clamping claw portions (42), which are respectively arranged at two ends of the plug-in portion (41).

8. The flexible LED light strip according to claim 5, characterized in that: There are two clamping claw portions (42), which are respectively arranged at two ends of the plug-in portion (41).

9. The flexible LED light strip according to claim 5, characterized in that: There are two clamping claw portions (42), which are respectively arranged at two ends of the plug-in portion (41).

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