Long-cascade non-voltage-drop neon lamp strip with IP67 protection level

Abstract

The utility model discloses an IP67 protection grade long cascade non-voltage drop neon lamp strip, which comprises a sleeve, an LED lamp strip, a plug, a tail plug and a wire rod, the sleeve comprises a light-proof base and a light strip, an accommodating cavity is formed between a light-transmitting strip and the light-proof base, and a hollow hole is formed at the end part of the light-transmitting strip; the LED light bar is located in the containing cavity. The containing cavity and an opening of the hollow hole are covered with silica gel sealing pastes, and the plug and the tail plug are integrally connected to the two ends of the sleeve and located on the outer sides of the silica gel sealing pastes. A notch is formed in the end of the light-proof base, a bonding pad of the LED lamp strip is exposed out of the notch, and the wire is welded to the bonding pad at the notch. The two ends of the sleeve are covered with the silica gel sealing stickers, and the plug and the tail plug are integrally formed at the two ends of the sleeve through the corresponding mold, so that the neon lamp strip reaches the IP67 protection grade. And the long-cascade non-voltage-drop effect of the lamp strip is achieved by optimizing the circuit design of the lamp strip, the problems that the neon lamp strip emits light inconsistently and flashes are solved, and meanwhile convenience is brought to construction of the lamp strip.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting technology, in particular to a long cascaded non-drop neon light strip with an IP67 protection level. Background Art

[0002] Neon light strips have the characteristics of long service life, energy conservation and environmental protection, and are widely used in the decorative lighting market, such as in lighting places such as signs, subtitle advertisements, building outline drawing, indoor ceiling lighting, and automobile body interior decoration. At present, there are mainly two types of neon light strips on the market. One is that the bare board light strip and silica gel are co-extruded through an extrusion molding machine to form an integral body; the other is that the bare board light strip is inserted into a silica gel sleeve; through these two methods, it is welded with wires, and then plugs and tail plugs are installed at both ends by gluing to form a neon light strip. Such waterproof performance is not good and can only reach the IP65 protection level. In addition, neon light strips generally have a single-end power supply of 5 meters or a two-end power supply of 10 meters per strip. This length brings inconvenience to construction. When the length exceeds, the luminous color will be inconsistent or there will be a flashing phenomenon. Therefore, the existing neon light strips should be improved to solve the above problems. Summary of the Utility Model

[0003] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present utility model is to provide a long cascaded non-drop neon light strip with an IP67 protection level, which covers silica gel sealing stickers at both ends of the sleeve, and integrally forms the plugs and tail plugs on the corresponding molds at both ends of the sleeve, so that the neon light strip reaches the IP67 protection level. And through the optimization of the light strip circuit design, the long cascaded non-drop effect of the light strip is realized, the problems of inconsistent light emission and flashing of the neon light strip are solved, and at the same time, it brings convenience to the construction of the light strip.

[0004] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0005] A long cascaded non-drop neon light strip with an IP67 protection level, which includes a sleeve, an LED light strip, plugs, tail plugs and wires. The sleeve includes an opaque base and a light-transmitting band installed above the opaque base. A receiving cavity for receiving the LED light strip is formed between the light-transmitting band and the opaque base, and a hollow hole is formed at the end of the light-transmitting band; the LED light strip is located in the receiving cavity; silica gel sealing stickers are covered at the opening of the receiving cavity and the hollow hole, the plugs and tail plugs are integrally connected to both ends of the sleeve and are located outside the silica gel sealing stickers; a notch is opened at the end of the opaque base, and the pads of the LED light strip are exposed at the notch, and the wires are welded to the pads at the notch.

[0006] As a preferred solution: a tensile prevention piece is arranged on the upper surface of the opaque base, and the LED light strip is located above the tensile prevention piece.

[0007] As a preferred solution: The bottom wall of the hollow hole of the light-transmitting strip and the top wall of the accommodating cavity of the light-impermeable base are both arc-shaped, and are provided with a plurality of light-transmitting strips extending along the direction of the sleeve to cause the light emitted by the LED light strip to undergo diffuse reflection.

[0008] As a preferred solution: The LED light strip includes a flexible strip, an IC chip welded to the flexible strip, and a plurality of LED lamp beads.

[0009] As a preferred solution: The plug includes a first plugging portion and a second plugging portion integrally connected. The first plugging portion integrally covers the openings of the accommodating cavity and the hollow hole; the second plugging portion integrally covers the outside of the notch to cover the pads of the LED light strip.

[0010] As a preferred solution: A wire tube is integrally connected to the lower surface of the second plugging portion, and the wire connected to the lower surface of the pad passes through the wire tube.

[0011] As a preferred solution: A strip-shaped concave cavity is provided at the bottom of the light-transmitting strip. First fitting portions are formed at the lower ends on both sides of the strip-shaped concave cavity. Second fitting portions are obliquely upwardly provided from the outer edges of the first fitting portions. The first fitting portions are flat, and the second fitting portions are inclined upwardly inclined surfaces; the light-impermeable base includes a first support groove and second support portions on both sides of the first support groove. The second support portions are obliquely upwardly connected to both sides of the first support groove in an inclined surface shape; the strip-shaped concave cavity and the second support groove enclose and form the accommodating cavity; the anti-pulling piece and the LED light strip are sequentially and stackedly installed in the first support groove. The first fitting portion is closely attached to the upper surface of the LED light strip, and the second fitting portion is closely attached to the second support portion on the same side.

[0012] As a preferred solution: It further includes a controller. The controller includes an input power supply unit, a reference voltage source unit for providing a stable reference voltage, an error amplifier for comparing the reference voltage and the actual LED voltage and submitting a driving current through feedback, a current sensing resistor for sensing the current passing through the LED light strip, and a power transistor for adjusting the current passing through the LED light strip and controlling the current flowing through the LED light strip according to the output of the error amplifier; the input power supply unit, the reference voltage source unit, the error amplifier, the power transistor, and the LED light strip are sequentially connected; the current sensing resistor and the LED light strip are respectively connected to the error amplifier.

[0013] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that by placing the LED light strip in the casing, covering the two ends of the casing with silicone sealant to prevent liquid silicone from flowing into the casing during injection molding; and forming the plug and the tail plug in an integrated corresponding mold at both ends of the casing, the two ends of the casing are completely sealed, so that the neon light strip reaches the IP67 protection level. In addition, by optimizing the design of the light strip line to achieve the long cascade without voltage drop effect of the light strip, the problem of inconsistent light emission and flickering of the neon light strip is well solved, and at the same time, it brings convenience to the construction of the light strip.

[0014] In order to more clearly illustrate the structural features and effects of the present invention, it is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional schematic diagram of the light strip of the utility model;

[0016] Figure 2 This is a three-dimensional schematic diagram of the light strip of the utility model from another perspective;

[0017] Figure 3 This is a schematic cross-sectional view of the end of the light strip of the present utility model;

[0018] Figure 4 This is a three-dimensional schematic diagram of the matching structure of one end of the light strip of the utility model;

[0019] Figure 5 This is a three-dimensional schematic diagram of the matching structure of the other end of the light strip of the utility model;

[0020] Figure 6 This is a three-dimensional schematic diagram of the silicone seal covering the end of the sleeve of the utility model;

[0021] Figure 7 This is an exploded three-dimensional schematic diagram of the light strip of the present utility model;

[0022] Figure 8 for Figure 7 The enlarged schematic diagram at M;

[0023] Figure 9 This is a schematic diagram of the controller and LED light bar control principle of the utility model;

[0024] Figure 10 This is a schematic diagram of the internal structure of the constant current drive circuit IC of the utility model;

[0025] Figure 11 The figure is a schematic diagram of the circuit principle of the light strip of the present utility model.

[0026] Description of the accompanying drawings:

[0027] 10. Sleeve; 11. Light-impermeable base; 111. Notch; 112. First support groove; 113. Second support portion; 12. Light-transmitting band; 121. Hollow hole; 122. Light-transmitting strip; 123. Strip-shaped cavity; 124. First fitting portion; 125. Second fitting portion; 13. Accommodation cavity; 20. LED light strip; 21. Flexible strip; 22. IC chip; 23. LED lamp bead; 24. Pad; 30. Plug; 31. First blocking portion; 32. Second blocking portion; 33. Wire tube; 40. Tail plug; 50. Wire; 60. Silicone sealing sticker; 70. Anti-pulling piece; 80. Controller; 81. Input power supply unit; 82. Reference voltage source unit; 83. Error amplifier; 84. Current sensing resistor; 85. Power transistor. Detailed implementation manner

[0028] As shown in the present utility model Figures 1 to 11 shown, a long cascaded non-drop neon light strip with an IP67 protection level includes a sleeve 10, an LED light strip 20, a plug 30, a tail plug 40 and a wire 50, wherein:

[0029] The sleeve 10 includes a light-impermeable base 11 and a light-transmitting band 12 installed above the light-impermeable base 11. An accommodation cavity 13 for accommodating the LED light strip 20 is formed between the light-transmitting band 12 and the light-impermeable base 11, and a hollow hole 121 is formed at the end of the light-transmitting band 12; the LED light strip 20 is located in the accommodation cavity 13; a silicone sealing sticker 60 covers the opening of the accommodation cavity 13 and the hollow hole 121. The plug 30 and the tail plug 40 are integrally connected to both ends of the sleeve 10 and are located outside the silicone sealing sticker 60; a notch 111 is opened at the end of the light-impermeable base 11, and the pad 24 of the LED light strip is exposed at the notch 111, and the wire 50 is welded to the pad 24 at the notch 111.

[0030] On the upper surface of the opaque base 11, a tensile prevention piece 70 is provided to prevent the LED light strip from being broken during use. The LED light bar 20 is closely attached above the tensile prevention piece 70. The bottom wall of the hollow hole 121 of the light-transmitting band 12 and the top wall of the accommodation cavity 13 of the opaque base 11 are both arc-shaped to expand the light-emitting angle, and there are a plurality of light-transmitting strips 122 extending along the direction of the sleeve 10 to cause the light emitted by the LED light bar 20 to be diffusely reflected, so that the light of the LED light strip is more fully dispersed. The LED light bar 20 includes a flexible strip 21, an IC chip 22 (not shown in the figure) welded to the flexible strip 21, and a plurality of LED lamp beads 23. The plug 30 includes a first blocking portion 31 and a second blocking portion 32 that are integrally connected. The first blocking portion 31 integrally covers the openings of the accommodation cavity 13 and the hollow hole 121. The second blocking portion 32 integrally covers the outside of the notch 111 to cover the pad 24 of the LED light bar 20. The combination of the first blocking portion 31 and the second blocking portion 32 forms a complete block of the end of the sleeve to improve the waterproof performance. And a wire tube 33 is integrally connected to the lower surface of the second blocking portion 32, and the wire 50 connected to the lower surface of the pad 24 passes through the wire tube 33, so that the connection part of the wire 50 and the pad 24 is completely covered inside the plug 30, further improving the waterproof performance.

[0031] A strip-shaped concave cavity 123 is provided at the bottom of the light-transmitting band 12. First fitting portions 124 are formed at the lower ends on both sides of the strip-shaped concave cavity 123. Second fitting portions 125 are inclined upward from the outer edges of the first fitting portions 124. The first fitting portions 124 are flat, and the second fitting portions 125 are inclined upward slopes. The opaque base 11 includes a first support groove 112 and second support portions 113 on both sides of the first support groove 112. The second support portions 113 are inclined upward and connected to both sides of the first support groove 112. The strip-shaped concave cavity 123 and the second support groove enclose the accommodation cavity 13. The tensile prevention piece 70 and the LED light bar 20 are sequentially and laminatedly installed in the first support groove 112. The first fitting portions 124 are closely attached to the upper surface of the LED light bar 20, and the second fitting portions 125 are closely attached to the second support portions 113 on the same side. Through the combination of multiple fitting portions, support grooves and support portions, the opaque base 11 and the light-transmitting band 12 are combined more closely and stably, improving the waterproof performance.

[0032] The long cascaded neon light strip with IP67 protection level is specifically formed by an extrusion molding machine to integrate the light-tight base 11, the light-transmitting strip 12, and the LED light strip 20 into a whole. The flexible strip 21 is pasted with LED lamp beads 23, ICs, and resistors through a chip mounter and enters the reserved accommodation cavity 13 through the extrusion molding machine; the head and tail sections of the sleeve 10 are provided with a plug 30 and a tail plug 40, and the wire passes through the hole of the plug 30 to be connected to the flexible strip. After being powered on, the light emitted by the LED lamp beads 23 passes through the light-transmitting strip 12 and comes out.

[0033] The sleeve 10 and the LED light strip 20 are formed into a whole by an extrusion molding machine. A notch 111 is processed at one end of the sleeve 10 through a jig, so that the pad 24 on the back of the flexible strip 21 is exposed from the notch 111, and the wire is connected to the pad 24 of the flexible strip 21 through a wire bonding machine.

[0034] The plug 30 and the tail plug 40 are made of liquid silicone A and B. They are mixed in a 1:1 ratio by a silicone injection molding machine and injected into a mold (first, a silicone seal 60 is pasted around the accommodation cavity 13 and the hollow hole 121 to form a seal, and the sleeve 10 around the accommodation cavity 13 and the hollow hole 121 at both ends of the light strip with the silicone seal 60 tightly pasted is placed in the mold, so that the liquid silicone will not flow into the accommodation cavity 13 and the hollow hole 121 during the injection of the liquid silicone) and are formed into one body with one end of the light strip; the mold is pre-set to a constant temperature between 140 - 180 degrees, and the pre-set mold opening time is between 80 - 120 seconds. The injected liquid silicone and the silicone seal 60 are fully vulcanized through the pre-set temperature and time to become solid and form a whole with the sleeve 10. This method has high production efficiency, simple structure and good sealing performance, and can achieve the protection level effect of IP67 for soaking in water.

[0035] The neon light strip further includes a controller 80. The controller 80 includes an input power supply unit 81, a reference voltage source unit 82 for providing a stable reference voltage, an error amplifier 83 for comparing the reference voltage and the actual LED voltage and submitting the driving current through feedback, a current sensing resistor 84 for sensing the current passing through the LED light strip 20, and a power transistor 85 for adjusting the current passing through the LED light strip 20 according to the output of the error amplifier 83 and controlling the current passing through the LED light strip 20; the input power supply unit 81, the reference voltage source unit 82, the error amplifier 83, the power transistor 85, and the LED light strip 20 are connected in sequence; the current sensing resistor 84 and the LED light strip 20 are respectively connected to the error amplifier 83.

[0036] Among them, for the input power supply unit 81: The linear drive IC receives the input voltage from an external power supply to provide electrical energy for the circuit, usually a DC voltage.

[0037] Reference voltage source unit 82: Provides a stable reference voltage through an internal reference voltage source, serving as the set point for the target current.

[0038] Error amplifier 83: Compares the reference voltage with the actual LED strip voltage and adjusts the drive current through feedback to maintain a constant current.

[0039] Current sensing resistor 84: Connected in the circuit loop of the LED strip, used to sense the current passing through the LED beads 23 and convert the sensed current into a voltage and send it to the error amplifier 83.

[0040] Power transistor 85: According to the output of the error amplifier 83, the low dropout power transistor 85 adjusts the current passing through the LED beads 23, responsible for controlling the current flowing through the LED beads 23 to maintain a constant current. The low dropout of the constant current device ensures long cascading of the light strip.

[0041] Feedback loop: Converts the sensed current into a voltage and feeds it back to the error amplifier 83 to achieve closed-loop control and ensure stable output current.

[0042] The said light strip can achieve single-end power supply for 30 meters and double-end power supply for 60 meters through the optimized circuit design of the flexible strip, which well solves the problems of inconsistent light emission and flashing of the neon light strip, and brings convenience to the construction party at the same time. The light strip adopts a linear IC architecture. The linear drive IC is an integrated circuit used to provide a constant current, usually used to drive loads that require a stable current such as LEDs. Its circuit architecture and functions offer some significant benefits as follows:

[0043] Over-temperature protection: Prevents the constant current drive circuit IC from overheating.

[0044] Constant current output: Has a stable brightness: Provides a constant current to ensure stable LED brightness and will not change due to fluctuations in the power supply voltage. Reduces the damage to the LED caused by current fluctuations and extends the service life of the LED.

[0045] Reduced flicker: The low-noise design ensures that the LED will not produce visible flicker during the entire use process.

[0046] Simplified circuit design: Compared with the switching mode power supply, the constant current drive circuit IC architecture is relatively simple and does not require complex magnetic components and high-frequency switches.

[0047] Reduced number of components: The simple circuit design reduces the number of components required, reducing the design complexity and cost.

[0048] The design focus of the present utility model lies in that by placing the LED light strip in the sleeve and covering the two ends of the sleeve with silicone sealing stickers to prevent the inflow of liquid silicone during injection molding into the sleeve; and integrally forming the plug and the tail plug corresponding to the mold at the two ends of the sleeve to completely seal the two ends of the sleeve, so that the neon light strip reaches the IP67 protection level. In addition, through the optimization of the light strip circuit design, the long cascading without voltage drop effect of the light strip is achieved, which well solves the problems of inconsistent light emission and flashing of the neon light strip, and at the same time brings convenience to the construction of the light strip.

[0049] The above are only the preferred embodiments of the present utility model, and do not impose any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A long cascaded no-voltage-drop neon light strip with IP67 protection grade, characterized by: It includes a sleeve, an LED light strip, a plug, a tail plug and a wire. The sleeve includes an opaque base and a light-transmitting belt installed above the opaque base. A accommodating cavity for accommodating the LED light strip is formed between the light-transmitting belt and the opaque base, and a hollow hole is formed at the end of the light-transmitting belt; the LED light strip is located in the accommodating cavity; the accommodating cavity and the opening of the hollow hole are covered with a silicone sealing paste, the plug and the tail plug are integrally connected to both ends of the sleeve and are located on the outside of the silicone sealing paste; a notch is opened at the end of the opaque base, the soldering pad of the LED light strip is exposed at the notch, and the wire is welded to the soldering pad at the notch.

2. The long cascaded no-voltage-drop neon light strip with IP67 protection level according to claim 1, characterized in that: An anti-pull sheet is arranged on the upper surface of the light-proof base, and the LED light strip is located above the anti-pull sheet.

3. The long cascaded no-voltage-drop neon light strip with IP67 protection level according to claim 1, characterized in that: The hollow hole bottom wall of the light-transmitting belt and the top wall of the accommodating cavity of the opaque base are both arc-shaped and have a plurality of light-transmitting strips extending along the sleeve direction to diffusely reflect the light emitted by the LED light strip.

4. The long cascaded no-voltage-drop neon light strip with IP67 protection level according to claim 1, characterized in that: The LED light strip comprises a flexible strip, an IC chip welded on the flexible strip, and a plurality of LED lamp beads.

5. The long cascaded no-voltage-drop neon light strip with IP67 protection level according to claim 1, characterized in that: The plug includes a first sealing portion and a second sealing portion which are integrally connected, wherein the first sealing portion integrally covers the opening of the accommodating cavity and the hollow hole; and the second sealing portion integrally covers the outside of the notch to cover the soldering pad of the LED light strip.

6. The long cascaded no-voltage-drop neon light strip with IP67 protection level according to claim 5, characterized in that: The lower surface of the second blocking portion is integrally connected with a wire tube, and the wire connected to the lower surface of the pad passes through the wire tube.

7. The long cascaded no-voltage-drop neon light strip with IP67 protection level according to claim 2, characterized in that: A strip-shaped cavity is arranged at the bottom of the light-transmitting belt, and a first fitting portion is formed at the lower ends of both sides of the strip-shaped cavity, and a second fitting portion is arranged obliquely upward from the outer edge of the first fitting portion, the first fitting portion is planar, and the second fitting portion is in the shape of an inclined surface inclined upward; the opaque base includes a first supporting groove and second supporting portions located on both sides of the first supporting groove, and the second supporting portions are in the shape of an inclined surface inclined upward and connected to both sides of the first supporting groove; the strip-shaped cavity and the second supporting groove surround the accommodating cavity; the anti-pull sheet and the LED light strip are installed in the first supporting groove in a stacked manner in sequence, the first fitting portion is tightly fitted to the upper surface of the LED light strip, and the second fitting portion is tightly fitted to the second supporting portion on the same side.

8. The long cascaded no-voltage-drop neon light strip with IP67 protection level according to claim 1, characterized in that: It also includes a controller, which includes an input power supply unit, a reference voltage source unit for providing a stable reference voltage, an error amplifier for comparing the reference voltage and the actual LED voltage and submitting a driving current through feedback, a current sensing resistor for sensing the current passing through the LED light bar, and a power transistor for adjusting the current passing through the LED light bar and controlling the current flowing through the LED light bar according to the output of the error amplifier; the input power supply unit, the reference voltage source unit, the error amplifier, the power transistor and the LED light bar are connected in sequence; the current sensing resistor and the LED light bar are respectively connected to the error amplifier.

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