LED lamp strip capable of being pre-pasted with gum

Abstract

The utility model discloses an LED lamp strip capable of being pre-pasted with gum, which comprises a circuit board, a plurality of LED lamp beads are arranged in the center of the circuit board, shear lines are arranged on two sides of the circuit board, an outer skin is wrapped outside the circuit board, the outer skin comprises an astigmatism layer and front shading layers, the astigmatism layer is positioned above the LED lamp beads on the front side of the circuit board, and the front shading layers are positioned on two sides of the astigmatism layer. The light scattering layer, the front shading layer, the back shading layer and the transparent layers extend along the length direction of the circuit board. A shearing mark can be observed through the transparent layer, the double-faced adhesive tape can be pre-pasted on the back face of the LED lamp strip before the LED lamp strip leaves a factory, when a consumer uses the LED lamp strip, the LED lamp strip only needs to be sheared according to requirements, release paper on the surface of the double-faced adhesive tape is peeled off, and the LED lamp strip is attached to a preset position, installation and use are convenient, the front face shading layer and the back face shading layer can prevent light leakage, and the service life of the LED lamp strip is prolonged. And light lines of the lamp strip are clearer.

Description

Technical Field

[0001] The utility model relates to an LED lamp, and particularly discloses an LED light strip which can be pre-sticked with adhesive. Background Art

[0002] The existing light strip includes a circuit board, the front of the circuit board is provided with LED lamp beads and solder pads, the back of the circuit board is provided with a cutting mark, and the circuit board is wrapped with an outer skin. The outer skin is located on the front of the circuit board as a light-scattering layer, and the light-scattering layer can scatter the light emitted by the LED lamp beads, so that the point light source is converted into a surface light source, and the light of the light strip is softer. The outer skin is located on the back of the circuit board as a transparent layer, allowing the user to observe the cutting mark printed on the back of the circuit board. The cutting mark is used to mark the position where the light strip can be cut to avoid the LED lamp beads and the circuit. The problems existing in the existing LED light strip include: 1. The light strip cannot be pre-attached with adhesive (usually double-sided adhesive) on the back of the light strip before leaving the factory, otherwise the cutting mark cannot be observed. The user can only cut the light strip according to the needs of the site, and then attach the adhesive on the back of the light strip for installation, which is inconvenient for consumers to use; 2. The outer skin is located on the back of the circuit board as a transparent layer, and the back of the light strip is prone to light leakage, affecting the use effect of the light strip or the clarity of the shape lines. Utility Model Content

[0003] Based on this, it is necessary to provide a pre-adhesive LED light strip that is easy to observe the cutting mark, simple to use, and has no light leakage, in order to solve the existing technical problems.

[0004] In order to solve the problems of the prior art, the utility model discloses an LED light strip with pre-adhesive backing, comprising a circuit board, a plurality of LED lamp beads are arranged in the center of the circuit board, cutting lines are arranged on both sides of the circuit board, and the circuit board is wrapped with an outer skin, the outer skin comprises a light scattering layer located above the LED lamp beads on the front side of the circuit board, a front light shading layer located on both sides of the light scattering layer, a transparent layer located at the cutting lines on both sides of the circuit board and a back light shading layer located on the back side of the circuit board, the light scattering layer, the front light shading layer, the back light shading layer and the transparent layer extend along the length direction of the circuit board.

[0005] The beneficial effects of the utility model are as follows: since the utility model has a light-scattering layer above the LED lamp beads on the front side of the circuit board, a front light-shielding layer on both sides of the light-scattering layer, a transparent layer on both sides of the front light-shielding layer, and a back light-shielding layer on the back side of the circuit board, the cutting mark can be observed through the transparent layer. Therefore, double-sided tape can be pre-attached on the back side of the LED light strip before it leaves the factory. When consumers use it, they only need to cut the LED light strip as required, peel off the release paper on the surface of the double-sided tape, and attach it to a predetermined position. It is easy to install and use, and the front light-shielding layer and the back light-shielding layer can prevent light leakage, and the light lines of the light strip are clearer.

[0006] As a further improvement of the utility model: the joining surfaces of the two front shading layers and the light-scattering layer are inclined surfaces, and the two inclined surfaces form a trumpet-shaped reflective wall centered on the LED lamp bead. The inclined surface extends from the surface of the circuit board to the outer surface. The corner where the transparent layer extends from the front to the side of the circuit board is an arc chamfer. The back of the back shading layer is attached with adhesive. Pads are also provided on both sides of the circuit board, and the shear line crosses the pads on both sides of the circuit board. The thickness of the light-scattering layer is greater than the thickness of the front shading layer and the transparent layer. The light-scattering layer also has an arc-shaped outer surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a partial cross-sectional view of the utility model.

[0008] Figure 2 for Figure 1 Schematic diagram of the AA section. DETAILED DESCRIPTION

[0009] In order to further understand the features, technical means, specific purposes and functions of the utility model, the utility model is further described in detail below in conjunction with the drawings and specific implementation methods. The components involved in this application document and the positional relationship between the components are only defined with reference to the positions of the components shown in the drawings, and do not represent a limitation on the scope of patent protection. A person of ordinary skill in the art will know that when the direction of the drawings changes, the description of the relative positional relationship may change, but the structural relationship of the product has not changed substantially.

[0010] refer to Figure 1 An LED light strip with pre-adhesive backing includes a circuit board 1, LED lamp beads 2 welded on the circuit board 1, a skin 3 wrapping the circuit board 1, and adhesive backing 4 attached to the back of the skin 3.

[0011] refer to Figure 1 . The circuit board 1 is stacked with a back insulating film, a circuit layer and a front insulating film in sequence from the back to the front. The LED lamp beads 2 are arranged in the center of the front of the circuit board 1 along the length direction of the circuit board 1, and each or several LED lamp beads 2 are connected to form an independent light-emitting module through a circuit. A pair of positive and negative pads 11 are provided on the circuit board 1 for each corresponding light-emitting module, and the positive and negative pads 11 are respectively located on both sides of the circuit board 1. The pads 11 are windows opened on the front insulating film of the circuit board 1 to expose the circuit layer, and the circuit board 1 is connected to an external power supply through the pads 11. A cutting line 12 crossing the positive and negative pads 11 is also printed on the front insulating film. The cutting line 12 is a mark to guide the user to cut the light strip. When the LED light strip is cut along the cutting line 12, the positive and negative pads 11 are divided into two, so that the two sections of the LED light strip after cutting can be connected to the external circuit through the half pads 11 at their ends.

[0012] refer to Figure 1 and Figure 2 The outer skin 3 extends along the length direction of the circuit board 1 and wraps the circuit board 1. The outer skin 3 includes a light-scattering layer 31 located directly above the LED lamp beads 2 on the front of the circuit board 1, a front light-shielding layer 32 located on both sides of the light-scattering layer 31, a transparent layer 33 located on both sides of the two front light-shielding layers 32 at the shear lines 12 on both sides of the circuit board 1, and also includes a back light-shielding layer 34 located on the back of the circuit board 1. The light-scattering layer 31, the front light-shielding layer 32, the transparent layer 33 and the back light-shielding layer 34 are integrally formed and extend along the length direction of the circuit board 1.

[0013] The light-scattering layer 31 is made of a light-transmitting opaque material and is used to scatter the light emitted by the LED lamp beads 2, converting the point light source into a surface light source, making the light of the light strip softer. The thickness of the light-scattering layer 31 is greater than the thickness of the front light-shielding layer 32 and the transparent layer 33, so that the light strip can be kept thin and light-weight, and a longer light scattering path can be obtained, resulting in a better light scattering effect. The light-scattering layer 31 also has an arc-shaped outer surface, which can reduce the total reflection of light and improve the light output efficiency of the light strip.

[0014] The front light shielding layer 32 is made of white opaque material and is used to block the light outside the front light scattering layer 31 of the circuit board 1. The joining surface of the two front light shielding layers 32 and the light scattering layer 31 is an inclined surface 321, and the inclined surface 321 extends from the surface of the circuit board 1 to the surface of the outer skin 1. In this way, the two inclined surfaces 321 constitute a trumpet-shaped reflective wall centered on the LED lamp bead 2. The front light shielding layer 32 can reflect light back to the light scattering layer 31 to improve the light extraction efficiency, and can completely block the light emitted by the LED lamp bead 2 to the side of the light scattering layer 31 and the side of the circuit board 1.

[0015] The transparent layer 33 is made of transparent material and is used to observe the pads 11 and the cut line 12 on the circuit board 1. The transparent layer 33 extends continuously along the length direction of the circuit board 1. Compared with only setting a transparent window at the cut line 12, it is easier to manufacture and provide a larger observation area. The corner of the transparent layer 33 extending from the front to the side of the circuit board 1 is a circular chamfer 331, which can reduce light refraction compared to a right-angle corner, making it easier to observe the pads 11 and the cut line 12 from the side of the outer skin 3. Since the pads 11 are located on both sides of the circuit board 1 and the cut line 12 crosses the pads 11, it is easier to observe the pads 11 and the cut line 12 from the transparent layer 33.

[0016] The back light shielding layer 34 is also made of white opaque material and is used to block the light directed to the back of the LED lamp beads to prevent the light from leaking out from the back of the LED light strip.

[0017] The manufacturing process of the outer skin of the utility model adopts a silicone cold extrusion heat setting process, and the specific steps are: first, a rubber mixing process, including mixing silicone with a diffuser and a vulcanizer to make a diffuser layer material, mixing silicone with a sunshade and a vulcanizer to make a sunshade layer material, and mixing silicone with a vulcanizer to make a transparent layer material; then a silicone extrusion molding process, including passing a circuit board with LED lamp beads installed through an extrusion die through a conveyor belt, and using three extruders to respectively inject the three materials obtained by the rubber mixing process into the extrusion die, and the extrusion die diverts the three materials through different flow channels, specifically covering the diffuser material on the outer skin. Above the LED lamp beads on the front of the circuit board, the shading material is covered on both sides of the diffusing material and the back of the circuit board, and the transparent material is covered on the position extending from the front of the circuit board to the side. The three materials are connected into an integrated structure in the extrusion mold to form an outer skin that wraps the circuit board; then there is a baking and shaping process, in which the wrapped LED light strip is sent into the oven through a conveyor belt, and is baked and shaped at a high temperature of about 180 degrees and for about 5 minutes; finally, there is a back glue attachment process. After the outer skin of the LED light strip cools to room temperature, the conveyor belt is reinstalled, and the back glue is attached to the back of the outer skin, that is, the back shading layer. The back glue is generally double-sided tape.

[0018] The utility model has a light diffusion layer above the LED lamp beads on the front side of the circuit board, front light shielding layers on both sides of the light diffusion layer, transparent layers on both sides of the front light shielding layer, and a back light shielding layer on the back side of the circuit board. The shear mark can be observed through the transparent layer. Therefore, double-sided tape can be pre-attached on the back side of the LED light strip before it leaves the factory. When the consumer uses it, he only needs to cut the LED light strip as required, peel off the release paper on the surface of the double-sided tape, and attach it to a predetermined position. It is easy to install and use. The front light shielding layer and the back light shielding layer can prevent light leakage, and the light lines of the light strip are clearer.

[0019] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An LED light strip with pre-adhesive backing, comprising a circuit board, a plurality of LED lamp beads are arranged in the center of the circuit board, cutting lines are arranged on both sides of the circuit board, and the circuit board is wrapped with an outer skin, characterized in that: The outer skin includes a light-scattering layer located above the LED lamp beads on the front side of the circuit board, a front light-shielding layer located on both sides of the light-scattering layer, a transparent layer located at the cutting lines on both sides of the circuit board, and a back light-shielding layer located on the back side of the circuit board. The light-scattering layer, the front light-shielding layer, the back light-shielding layer and the transparent layer extend along the length direction of the circuit board.

2. The LED light strip with pre-adhesive adhesive according to claim 1, characterized in that: The joining surfaces of the two front light-shielding layers and the light-scattering layer are inclined surfaces, and the two inclined surfaces form a trumpet-shaped reflective wall centered on the LED lamp bead.

3. The LED light strip with pre-adhesive adhesive according to claim 2, characterized in that: The inclined surface extends from the circuit board surface to the outer skin surface.

4. The LED light strip with pre-adhesive adhesive according to claim 1, characterized in that: The corner where the transparent layer extends from the front side of the circuit board to the side side is a circular chamfer.

5. The LED light strip with pre-adhesive adhesive according to claim 1, characterized in that: The back side of the back light shielding layer is attached with a back adhesive.

6. The LED light strip with pre-adhesive adhesive according to claim 1, characterized in that: Solder pads are also arranged on both sides of the circuit board, and the cutting line crosses the solder pads on both sides of the circuit board.

7. The LED light strip with pre-adhesive adhesive according to claim 1, characterized in that: The thickness of the light-scattering layer is greater than that of the front light-shielding layer and the transparent layer.

8. The LED light strip with pre-adhesive adhesive according to claim 7, characterized in that: The light diffusion layer also has an arc-shaped outer surface.

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