Stable flexible LED lamp strip

Abstract

The utility model relates to a stable flexible LED lamp strip which comprises a flexible insulating substrate, lamp beads arranged on one side face of the flexible insulating substrate and a heat dissipation copper plate arranged on the other side face of the flexible insulating substrate. Two horizontal extending parts are arranged at the lower end of the outer side wall of the lamp bead, the two extending parts are oppositely located on the two sides of the lamp bead, first through holes are longitudinally formed in the extending parts in a penetrating mode, second through holes communicated with the surface of the heat dissipation copper plate and the first through holes are formed in the flexible insulation substrate, and concave positions are formed in the inner walls of the first through holes; a connecting piece fixedly connected with the heat dissipation copper plate is further arranged in the first through hole, a protruding part corresponding to the concave position is arranged on the connecting piece, in the installation process, the lamp bead can be pulled and fixed to the flexible insulation substrate through the fact that the connecting piece is fixedly connected with the copper sheet and matched with the protruding part, and compared with the mode that the lamp bead is fixed only through mucilage glue, the stability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of LED light strips, and in particular to a stable flexible LED light strip. Background Art

[0002] LED is a light emitting diode. As a new light source, LED has advantages over traditional light sources, such as small size, low power consumption, long service life and strong structure. It is precisely because of the above advantages that LED is rapidly replacing traditional light sources to become the main light source for commercial and household use. Various lighting products based on LED are also emerging, and LED light strips are also used in various environments as decorative lights.

[0003] For the convenience of assembly, some existing LED light strips use glue to fix the LED lamp beads around the flexible substrate after soldering. However, this installation method may cause the lamp beads to fall off or warp around after being hit during packaging, transportation or use, thereby affecting the normal use of the light strip and not being conducive to ensuring the stability of the product. Therefore, it is necessary to make improvements to the existing LED strips with shortcomings. Utility Model Content

[0004] The purpose of the utility model is to provide a stable flexible LED light belt to address the deficiencies in the prior art, and the stable flexible LED light belt can well solve the above-mentioned problems.

[0005] In order to achieve the above requirements, the technical solution adopted by the utility model to solve its technical problems is:

[0006] A stable flexible LED light strip is provided, comprising a flexible insulating substrate, a lamp bead arranged on one side of the flexible insulating substrate, and a heat dissipation copper plate arranged on the other side of the flexible insulating substrate; two horizontal extensions are arranged at the lower end of the outer wall of the lamp bead, and the two extensions are relatively located on two sides of the lamp bead, a first through hole is longitudinally penetrated on the extension, and a second through hole connecting the surface of the heat dissipation copper plate and the first through hole is arranged on the flexible insulating substrate; a recess is arranged on the inner wall of the first through hole, and a connecting piece fixedly connected to the heat dissipation copper plate is also arranged in the first through hole, and a protrusion is arranged on the connecting piece corresponding to the recess.

[0007] The stable flexible LED light strip described in the utility model, wherein a groove is provided on the inner wall of the first through hole, the groove forms the concave position, and the connecting piece is formed by heating and solidifying low-temperature solder paste.

[0008] The stable flexible LED light strip described in the utility model, wherein the upper end of the groove passes through the upper surface of the extension portion, the bottom surface of the groove is a longitudinal inclined surface, the lower end of the inclined surface is inclined toward the axis of the first through hole, and the upper end of the inclined surface is inclined in a direction away from the axis.

[0009] The stable flexible LED light strip described in the utility model, wherein a boss is protruding from the bottom of the extension portion, the first through hole coaxially penetrates the bottom surface of the boss, and a positioning groove adapted to the boss is provided on the flexible insulating substrate.

[0010] In the stable flexible LED light strip described in the utility model, the two ends of the two extension parts are connected to each other to form a ring structure.

[0011] In the stable flexible LED light strip described in the utility model, the heat dissipation copper plate is circular and is coaxially arranged with the annular structure.

[0012] The stable flexible LED light strip described in the utility model, wherein the flexible insulating substrate is provided with input pins and output pins arranged side by side along its width direction, and the input pins and the output pins are located on the same side of the flexible insulating substrate as the lamp beads.

[0013] The beneficial effect of the utility model is that during installation, the lamp beads are fixedly connected to the heat dissipation copper plate through the connecting parts, and the protrusions and recesses on the connecting parts can be used to fix the lamp beads on the flexible insulating substrate. Compared with the traditional method of using adhesives, the structural strength of this solution is higher and the stability is stronger. After being impacted during packaging, transportation or use, the lamp beads are not easy to fall off or warp, thereby affecting the luminous effect of the light strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. 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 creative work:

[0015] Figure 1 It is a top view of the stable flexible LED light strip of the utility model.

[0016] Figure 2 It is a longitudinal sectional view of the local structure of the stable flexible LED light strip of the utility model.

[0017] Figure 3 It is a schematic diagram of the front circuit leads of the stable flexible LED light strip of the utility model.

[0018] Figure 4It is a schematic diagram of the back circuit leads of the stable flexible LED light strip of the utility model. DETAILED DESCRIPTION

[0019] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0022] Moreover, the terms "up, down, left, right, upper end, lower end, longitudinal" and the like indicating directions are all based on the posture and position of the device or equipment described in this solution during normal use.

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0024] The stable flexible LED light strip of the preferred embodiment of the utility model is as follows Figure 1-4As shown, it includes a flexible insulating substrate 10, a lamp bead 20 arranged on one side (front) of the flexible insulating substrate 10, and a heat dissipation copper plate 40 arranged on the other side (back) of the flexible insulating substrate 10. Among them, two pin copper sheets 50 are provided on the flexible insulating substrate 10 corresponding to the two poles of the lamp bead 20, so as to provide welding for the two-pole pins of the lamp bead 20. Specifically, the flexible insulating substrate 10 is in the shape of a long strip, and the lamp bead 20 is provided with a plurality of lamp beads 20 and is evenly arranged along the length direction of the flexible insulating substrate 10. Specifically, the lamp bead 20 is in a cylindrical structure. The heat dissipation copper plate 40 can not only play the role of heat dissipation for the lamp bead 20, but also prevent the flexible insulating substrate 10 around the lamp bead from being bent, causing the lamp bead 20 to de-tin, further improving the stability of the product.

[0025] Furthermore, two horizontal extensions 21 are provided at the lower end of the outer wall of the lamp bead 20, and the two extensions 21 are relatively located on both sides of the lamp bead. A first through hole 211 is longitudinally penetrated on the extension 21, and a second through hole 11 is provided on the flexible insulating substrate 10 to connect the surface of the heat dissipation copper plate 40 and the first through hole 211; a recess 60 is provided on the inner wall of the first through hole 211, and a connector 70 fixedly connected to the heat dissipation copper plate 40 is also provided in the first through hole 211, and a protrusion 71 is provided on the connector 70 corresponding to the recess 60; during installation, the connector 70 is fixedly connected to the copper sheet, and the protrusion 71 on the connector 70 is snapped into the recess 60 to pull and fix the lamp bead on the flexible insulating substrate 10. Compared with the method of using glue, the structural strength of this scheme is higher and the stability is stronger. After being hit during packaging, transportation or use, the lamp bead is not easy to fall off or warp, thereby affecting the luminous effect of the lamp strip. Moreover, glue can be further provided at the bottom of the lamp bead to further play a role of sealing and fixing.

[0026] In this embodiment, a groove is provided on the inner wall of the first through hole 211, and the groove forms the above-mentioned recessed position 60, and the connecting piece 70 is formed by solidifying low-temperature solder paste, which facilitates separate processing and reduces the difficulty of assembly operation. In actual operation, it is only necessary to fill the first through hole 211, the second through hole 11 and the recessed position 60 with low-temperature solder paste. The solder paste can be quickly melted and fixedly connected to the heat dissipation copper plate 40 by a hot air gun, which further ensures the strength of the connection, and can also be completed simultaneously with the pin welding of the lamp bead, which can greatly reduce the processing steps.

[0027] In this embodiment, the upper end of the groove passes through the upper surface of the extension portion 21, and the bottom surface of the groove is a longitudinal slope 61. The lower end of the slope 61 is inclined toward the axis of the first through hole 211, and the upper end of the slope 61 is inclined in a direction away from the axis. The inclined penetration design of the groove can facilitate the filling of solder paste and avoid the generation of bubbles.

[0028] In this embodiment, a boss 212 is protruding from the bottom of the extension portion 21, and a first through hole 211 coaxially penetrates the bottom surface of the boss 212. A positioning groove 12 adapted to the boss 212 is provided on the flexible insulating substrate 10 to further play a positioning role, and at the same time, it can also prevent the melted solder paste from contacting the copper sheet 50 of the lamp bead pin and causing a short circuit.

[0029] In this embodiment, two ends of the extension portion 21 are connected to each other to form a ring structure, so as to achieve a better positioning effect and facilitate the arrangement of a larger number of connectors 70 .

[0030] In this embodiment, the heat dissipation copper plate 40 is circular and is coaxially arranged with the annular structure to adapt to the structure of the lamp bead.

[0031] In this embodiment, the flexible insulating substrate 10 is provided with input pins 80 and output pins 90 arranged side by side along the width direction thereof, and the input pins 80 and the output pins 90 are located on the same side of the flexible insulating substrate as the lamp beads, that is, the input pins 80 and the output pins 90 and the lamp beads 20 are all located on the front side of the flexible insulating substrate 10. Compared with the traditional method of arranging the input pins 80 and the output pins 90 on both sides of the lamp beads respectively, the method provided by this solution can prevent the input pins 80 and the output pins 90 from accidentally contacting the inner wall of the housing after the light strip is installed in the metal housing, causing a short circuit.

[0032] Among them, every 8 lamp beads form a light strip section 100 on the flexible insulating substrate, and each light strip section 100 is provided with an input pin 80 and an output pin 90 at both ends. Of course, the number of lamp beads contained in each light strip section 100 does not have to be 8, and can also be other numbers. On the front of each light strip section 100, between the input pins 80 at both ends thereof, there is a mounting area 120 for mounting a resistor 110 for removing residual light. Furthermore, a positive lead 130 and a negative lead 140 are arranged side by side on the front side of the flexible insulating substrate along its width direction. The positive lead 130 and the negative lead are both long strips and are arranged along the length direction of the flexible insulating substrate. The length of the positive lead 130 is the same as the length of a light strip section 100, and the length of the negative lead 140 is less than the length of the positive lead 130. There is another negative lead 140 corresponding to the same side of two adjacent positive leads. The opposite sides of the positive lead 130 and the negative lead 140 are provided with extensions 150 facing each other, and the two adjacent extensions 150 are respectively connected to the positive lead 130 and the negative lead 140, so as to be connected to the positive and negative poles of the lamp bead respectively. In order to adapt to the number of lamp beads and the number of extension parts 150 and to facilitate the addition of a third lamp bead, an island lead 160 is provided between the two extension parts 150 corresponding to the positive and negative poles. The island lead 160 is connected to the negative lead 140 through an additional lead 170 provided on the back of the flexible insulating substrate. The connection method adopts a via connection, that is, a via 180 is opened on the negative lead and the additional lead 170 and connected by soldering.

[0033] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A stable flexible LED light strip, characterized in that: It includes a flexible insulating substrate, a lamp bead arranged on one side of the flexible insulating substrate, and a heat dissipation copper plate arranged on the other side of the flexible insulating substrate; two horizontal extensions are arranged at the lower end of the outer wall of the lamp bead, and the two extensions are relatively located on both sides of the lamp bead, and a first through hole is longitudinally penetrated on the extension part, and a second through hole connecting the surface of the heat dissipation copper plate and the first through hole is arranged on the flexible insulating substrate; a recess is arranged on the inner wall of the first through hole, and a connecting piece fixedly connected to the heat dissipation copper plate is also arranged in the first through hole, and a protrusion is arranged on the connecting piece corresponding to the recess.

2. The stable flexible LED light strip according to claim 1, characterized in that: A groove is provided on the inner wall of the first through hole, the groove forms the concave position, and the connecting piece is formed by heating and solidifying low-temperature solder paste.

3. The stable flexible LED light strip according to claim 2, characterized in that: The upper end of the groove passes through the upper surface of the extension portion, the bottom surface of the groove is a longitudinal slope, the lower end of the slope is inclined toward the axis of the first through hole, and the upper end of the slope is inclined in a direction away from the axis.

4. The stable flexible LED light strip according to claim 1, characterized in that: A boss is protruding from the bottom of the extension portion, the first through hole coaxially penetrates the bottom surface of the boss, and a positioning groove adapted to the boss is provided on the flexible insulating substrate.

5. The stable flexible LED light strip according to claim 1, characterized in that: The two ends of the two extension parts are connected to each other to form a ring structure.

6. The stable flexible LED light strip according to claim 5, characterized in that: The heat dissipation copper plate is circular and is coaxially arranged with the annular structure.

7. The stable flexible LED light strip according to claim 1, characterized in that: The flexible insulating substrate is provided with input pins and output pins arranged side by side along the width direction thereof, and the input pins and the output pins are located on the same side of the flexible insulating substrate as the lamp beads.

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