Light string

Abstract

The utility model discloses a lamp string which comprises a power line used for being connected with a power connector and a plurality of circuit boards, the power line is provided with a plurality of welding parts, and one circuit board is welded to one welding part so that the circuit board can be electrically connected with the power line. The power line at least comprises a first wire, a second wire and a third wire which are arranged side by side and extend continuously. The first wire, the second wire and the third wire are each provided with a plurality of welding parts welded to the circuit board. Any circuit board is at least provided with a first light-emitting part, a second light-emitting part and a third light-emitting part, the anode of the first light-emitting part is connected to the first wire, and the cathode is connected to the second wire and the third wire in parallel; the anode of the second light-emitting part is connected to the second lead, and the cathode is connected in parallel to the first lead and the third lead; the anode of the third light-emitting part is connected to the third wire, and the cathode is connected in parallel to the first wire and the second wire. According to the lamp string, circuit connection can be achieved through a small number of welding points, assembling efficiency is improved, and cost is saved.

Description

Technical Field

[0001] This application relates to the field of lighting equipment technology, and in particular to a string of lights. Background Technology

[0002] String lights are tools that connect multiple light fixtures with power cords to achieve both illumination and decoration. They can be used on eaves, tents, and other similar installations. In existing technology, string lights consist of multiple sets of power cords, with each light fixture having its positive and negative terminals each soldered with a separate set of cords. This requires preparing multiple sets of power cords and soldering them separately at the positive and negative terminals, increasing the number of soldering points and resulting in low assembly efficiency. Furthermore, each set of power cords includes multiple wires, and the number of wires corresponds to the color of the light emitted by the light-emitting element. To emit four colors of light, four wires are required, increasing the overall cost of the string light.

[0003] The above content is only used to assist in understanding the technical solution of the utility model and does not represent an admission that the above content is prior art. Utility Model Content

[0004] In view of the above problems, this utility model proposes a light string to improve the assembly efficiency and save costs.

[0005] To achieve the above objectives, the light string proposed in this utility model includes: a power cord for connecting a power connector and multiple circuit boards, wherein,

[0006] The power cord is provided with multiple soldering parts, and a circuit board is soldered to one of the soldering parts to make the circuit board electrically connected to the power cord.

[0007] The power line includes at least a first conductor, a second conductor, and a third conductor arranged side by side and extending continuously. Each of the first conductor, the second conductor, and the third conductor has a plurality of soldering portions that are soldered to the circuit board.

[0008] Any of the circuit boards is provided with a light-emitting component, the light-emitting component including at least a first light-emitting element, a second light-emitting element and a third light-emitting element, the positive electrode of the first light-emitting element is connected to the first wire, and the negative electrode is connected in parallel to the second wire and the third wire;

[0009] The positive electrode of the second light-emitting element is connected to the second wire, and the negative electrode is connected in parallel to the first wire and the third wire;

[0010] The positive electrode of the third light-emitting element is connected to the third wire, and the negative electrode is connected in parallel to the first wire and the second wire.

[0011] In one embodiment, a current-limiting resistor is provided on the connection path of the first light-emitting element, the second light-emitting element, and the third light-emitting element.

[0012] In one embodiment, the first conductor, the second conductor, and the third conductor each include a metal core and an insulating layer that encloses the metal core, and a portion of the insulating layer is peeled off to expose the metal core, thereby forming the solder joint.

[0013] In one embodiment, the metal core is a thick copper wire.

[0014] In one embodiment, the circuit board has a first side and a second side facing away from each other, and the light-emitting component is mounted in the middle of the first side;

[0015] The circuit board is provided with at least three conductive terminals that pass through the circuit board and are spaced apart. The conductive terminals are electrically connected to the light-emitting component and are provided corresponding to the light-emitting component.

[0016] The second side is provided with a solder joint for each of the conductive terminals, and the first wire, the second wire and the third wire are respectively soldered to one of the solder joints.

[0017] In one embodiment, a plurality of the conductive terminals are arranged side by side along the parallel direction of the first conductor, the second conductor, and the third conductor.

[0018] In one embodiment, the light string further includes multiple housings, and a circuit board is mounted in a mounting cavity of one of the housings, with the plane where the circuit board is located being a reference plane;

[0019] The housing includes a base and a light-transmitting cover, the light-transmitting cover being fitted onto the base, and the base and the light-transmitting cover forming the mounting cavity;

[0020] One of the base and the light-transmitting cover has a splicing surface, and the other has a mating surface corresponding to the splicing surface. The splicing surface and the mating surface enclose a wire passage. The extension direction of the wire passage is set at an angle to the reference surface. The first wire, the second wire, and the third wire pass through the wire passage at their upper limits in their extension directions.

[0021] In one embodiment, the splicing surface is provided with a protrusion, the mating surface is provided with a groove corresponding to the protrusion, and the wire passage is opened between the protrusion and the groove so that the wire passage is arched.

[0022] In one embodiment, the base has a plurality of limiting posts protruding from the wall near the light-transmitting cover. The plurality of limiting posts are arranged at intervals around the circuit board, and the periphery of the circuit board abuts against the limiting posts.

[0023] In one embodiment, any of the limiting posts has a raised post protruding from the wall near the circuit board, and the circuit board overlaps the raised post to form an installation space between the circuit board and the base, and the welding part is located within the installation space.

[0024] This novel LED string light design eliminates the need for soldering multiple power wires to each circuit board individually. Instead, it achieves circuit connectivity with a small number of solder points, reducing the number of solder joints and time required, thus improving assembly efficiency. For example, in existing technologies, three wires require six solder joints to connect the circuit; this embodiment only requires three, reducing soldering costs and time, thereby enhancing assembly efficiency.

[0025] Secondly, the light string of this invention can use three wires to achieve four colors of light source. For example, the first light-emitting element emits red light, the second light-emitting element emits green light, and the third light-emitting element emits blue light. The first, second, and third light-emitting elements emit light in turn, and the three light-emitting elements flash rapidly to display white. Compared with the existing technology where the number of wires corresponds to the number of light-emitting colors, this embodiment saves the cost of one wire, thereby reducing the overall cost of the light string. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the structure of an embodiment of the light string of this utility model is shown;

[0028] Figure 2 for Figure 1 A schematic diagram of the structure of the other side of the light string shown;

[0029] Figure 3 This is the circuit diagram of the light string of this utility model;

[0030] Figure 4 This is a schematic diagram of the first side of the circuit board of the light string of this utility model;

[0031] Figure 5 This is a schematic diagram of the housing of the light string of this utility model;

[0032] Figure 6 This is an exploded view of the housing of the light string of this utility model;

[0033] Figure 7 This is a cross-sectional view of the housing of the light string of this utility model;

[0034] Explanation of icon numbers:

[0035] label name label name label name 100 String lights 211 First light-emitting component 41 Light-transmitting cover 10 power cord 212 Second light-emitting element 42 base 11 Welding section 213 Third light-emitting component 421 Limiting post 12 First conductor 22 First page 422 Raise the column 13 Second conductor 23 Second side 43 splicing surface 14 Third conductor 24 conductive terminals 431 protrusion 15 Metal wire core 25 Welding points 44 Mating surfaces 16 Insulation layer 30 Current limiting resistor 432 groove 20 circuit board 40 case 45 Through-line channel 21 Light-emitting components

[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text is to include three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies both A and B.

[0040] This utility model proposes a light string 100.

[0041] In this embodiment of the utility model, please refer to Figures 1 to 7The light string 100 includes a power cord 10 for connecting a power connector and multiple circuit boards 20. The power cord 10 has multiple solder joints 11, and a circuit board 20 is soldered to a solder joint 11 to make the circuit board 20 electrically connected to the power cord 10. The power cord 10 includes at least a first conductor 12, a second conductor 13, and a third conductor 14 arranged side by side and extending continuously. Each of the first conductor 12, the second conductor 13, and the third conductor 14 has multiple solder joints 11 for soldering to the circuit board 20. Each circuit board 20 has a light-emitting component 21, which includes at least a first light-emitting element 211, a second light-emitting element 212, and a third light-emitting element 213. The positive electrode of the first light-emitting element 211 is connected to the first conductor 12, and the negative electrode is connected in parallel to the second conductor 13 and the third conductor 14. The positive electrode of the second light-emitting element 212 is connected to the second conductor 13, and the negative electrode is connected in parallel to the first conductor 12 and the third conductor 14. The positive electrode of the third light-emitting element 213 is connected to the third conductor 14, and the negative electrode is connected in parallel to the first conductor 12 and the second conductor 13.

[0042] In this embodiment, the power cord 10 is a conductive element used to connect the power connector to each circuit board 20 in the light string 100. Its function is to transmit current from the power source to each lamp or circuit board 20 to power the light-emitting components 21. The power cord 10 includes multiple conductors, typically made of copper wire or other conductive materials to ensure good conductivity. To ensure the safety and stability of the circuit, the power cord 10 is often wrapped with an insulation layer 16 to prevent short circuits or electric shock hazards.

[0043] The solder joint 11 is a portion of the power cord 10 that has been processed for connection to the circuit board 20. The solder joint 11 is typically a section of the power cord 10 where the insulation layer 16 has been removed, exposing the conductive material for soldering. The solder joint 11 can be an exposed wire end, the conductive portion remaining after the outer sheath of the power cord 10 has been stripped. This portion is connected to electrodes on the circuit board 20 via hot pressing, soldering, or other methods.

[0044] Circuit board 20 is a substrate for mounting electrical components, such as light-emitting component 21. It connects power line 10 to light-emitting component 21 via circuit connections. Circuit board 20 is typically a rigid board to ensure that light-emitting component 21 can be stably mounted on circuit board 20.

[0045] The light-emitting component 21 is the core element providing the lighting effect in the light string 100. It typically includes multiple light-emitting elements, each capable of emitting light of a specific color. The light-emitting component 21 includes at least three light-emitting elements, which can be LEDs. Each light-emitting element consists of a positive and a negative electrode, used to control the flow of current and its light-emitting effect. To enable the light string 100 to have multiple colors, the light-emitting elements may use RGB LED technology to control red, green, and blue light colors respectively. In other words, the first light-emitting element 211 emits red light, the second light-emitting element 212 emits green light, and the third light-emitting element 213 emits blue light. The first light-emitting element 211, the second light-emitting element 212, and the third light-emitting element 213 emit light in turn, and the three light-emitting elements flash rapidly to display white.

[0046] The light string 100 in this embodiment emits light using an alternating positive and negative electrode principle. Specifically, the positive electrode of the first light-emitting element 211 is connected to the first wire 12, and the negative electrode is connected in parallel to the second wire 13 and the third wire 14, meaning that either the second wire 13 or the third wire 14 can serve as the negative electrode of the first light-emitting element 211; the positive electrode of the second light-emitting element 212 is connected to the second wire 13, and the negative electrode is connected in parallel to the first wire 12 and the third wire 14, meaning that either the first wire 12 or the third wire 14 can serve as the negative electrode of the second light-emitting element 212; the positive electrode of the third light-emitting element 213 is connected to the third wire 14, and the negative electrode is connected in parallel to the first wire 12 and the second wire 13, meaning that either the first wire 12 or the second wire 13 can serve as the negative electrode of the third light-emitting element 213.

[0047] The LED string 100 of this invention arranges multiple wires of the power cord 10 in a parallel and continuous manner, eliminating the need to solder multiple power cords 10 individually to each circuit board 20. Instead, the circuit can be connected using only a small number of solder points 25, reducing the number of solder points 25 and the time required, thereby improving assembly efficiency. For example, in the prior art, if there are three wires, six solder points 25 are needed to connect the circuit. In this embodiment, only three solder points 25 are needed to connect the circuit, reducing the cost of soldering at the solder points 25 and the soldering time, thus improving assembly efficiency.

[0048] Secondly, the light string 100 of this invention can use three wires to achieve four colors of light source. For example, the first light-emitting element 211 emits red light, the second light-emitting element 212 emits green light, and the third light-emitting element 213 emits blue light. The first light-emitting element 211, the second light-emitting element 212, and the third light-emitting element 213 emit light in turn, and the three light-emitting elements flash rapidly to display white. Compared with the prior art scheme where the number of wires corresponds to the number of light-emitting colors, this embodiment saves the cost of one wire, thereby reducing the overall cost of the light string 100.

[0049] In one embodiment, a current-limiting resistor 30 is provided on the connection path of the first light-emitting element 211, the second light-emitting element 212, and the third light-emitting element 213 to control the current passing through each light-emitting element, thereby ensuring the normal operation of the light-emitting elements and preventing damage to the light-emitting elements due to excessive current. For example, the current-limiting resistor 30 can be connected to the positive or negative terminal of the light-emitting element, which is not limited here. Preferably, the resistance value of the current-limiting resistor 30 can be 2.2kΩ to ensure the current of the light-emitting elements.

[0050] In one embodiment, the first conductor 12, the second conductor 13, and the third conductor 14 each include a metal core 15 and an insulating layer 16 that wraps around the metal core 15. A portion of the insulating layer 16 is peeled off to expose the metal core 15, thereby forming a solder joint 11.

[0051] In this embodiment, the metal core 15 is responsible for current conduction and is typically made of highly conductive metals such as copper or aluminum. The metal core 15 can be made of multiple copper or aluminum wires, or even a single copper or aluminum wire; there is no limitation on this. The insulation layer 16 is the material wrapped around the metal core 15, designed to prevent current leakage, short circuits, electric shock, and other safety hazards. The insulation layer 16 is typically made of non-conductive materials such as flexible plastics or rubber, which have good insulation and anti-aging properties.

[0052] At the connection point of the power cord 10, the metal wire core 15 is exposed by stripping the insulation layer 16, thereby forming a solder joint 11. The solder joint 11 is used for electrical connection with the circuit board 20, ensuring current transmission between the power cord 10 and the circuit board 20. Stripping the insulation layer 16 is usually done by mechanical wire stripping machine or manual stripping.

[0053] In the circuit connection, the design of stripping the insulation layer 16 and exposing the metal wire core 15 to form the solder joint 11 makes the connection of the power cord 10 simpler and more efficient. Specifically, each wire of the power cord 10 is connected to a corresponding solder point 25 on the circuit board 20 via the solder joint 11. Each wire's solder joint 11 corresponds to a different solder point 25 on the circuit board 20, ensuring stable current flow and driving of the light-emitting components. In this way, multiple circuit boards 20 can be quickly soldered onto the power cord 10 without interruption, improving assembly efficiency.

[0054] In one embodiment, the metal core 15 is a thick copper wire. A thick copper wire refers to a copper wire with a larger diameter. Generally, a thick copper wire has a larger diameter, which allows it to carry a larger current compared to a thin copper wire, and it is less susceptible to external forces, maintaining its shape and conductivity. In this embodiment, the insulation layer 16 is stripped using a mechanical wire stripper, exposing a portion of the metal core 15. During the stripping process, the mechanical wire stripper can precisely strip the insulation layer 16 of the power line 10, ensuring that a sufficient portion of the metal core 15 is exposed for connection. Because a thick copper wire is used, the operation of the wire stripper is more stable, reducing the risk of easily cutting due to the copper wire being too thin.

[0055] In one embodiment, reference is made to Figure 2 and Figure 4 The circuit board 20 has a first side 22 and a second side 23 facing away from each other. The light-emitting component 21 is installed in the middle of the first side 22. The circuit board 20 is provided with at least three conductive terminals 24 that pass through the circuit board 20 and are spaced apart. The conductive terminals 24 are electrically connected to the light-emitting component 21 and are provided corresponding to the light-emitting component 21. The second side 23 is provided with a soldering point 25 corresponding to each conductive terminal 24. The first wire 12, the second wire 13 and the third wire 14 are respectively soldered to a soldering point 25.

[0056] In this embodiment, the circuit board 20 has two sides. The first side 22 is used to mount the light-emitting component 21, while the second side 23 has solder points 25 for connecting to the power line 10. This effectively utilizes both sides of the circuit board 20, increasing space utilization.

[0057] The circuit board 20 has at least three conductive terminals 24 penetrating the circuit board 20. These terminals are located on the circuit board 20 and spaced apart. Each conductive terminal 24 is electrically connected to the light-emitting component 21, ensuring that each light-emitting component is connected to the power line 10 through an independent terminal. Simultaneously, the conductive terminals 24 are positioned corresponding to the light-emitting components 21, i.e., the conductive terminals 24 are located in the middle of the second surface 23, to shorten the distance between the conductive terminals 24 and the light-emitting components 21, thereby reducing wiring difficulty. Furthermore, the solder joint 25 is located in the middle of the second surface 23, meaning the distance from the solder joint 11 to the opposite ends of the circuit board 20 is the same, resulting in uniform stress on the power line 10 and a more stable connection between it and the circuit board 20.

[0058] One end of the conductive terminal 24 is connected to the light-emitting component 21, and the other end, the solder point 25, is connected to the wire of the power line 10. When the solder part 11 of the power line 10 is connected to the solder point 25, a stable circuit path is formed, ensuring that the current is stably transmitted to each light-emitting component.

[0059] Furthermore, multiple conductive terminals 24 are arranged side-by-side along the parallel direction of the first conductor 12, the second conductor 13, and the third conductor 14, meaning that multiple conductive terminals 24 are located in the same row of the circuit board 20, forming a side-by-side layout. Since the solder points 25 are arranged corresponding to the conductive terminals 24, the solder portions 11 of the first conductor 12, the second conductor 13, and the third conductor 14 are located in the same position. This allows the wire stripper to simultaneously strip the insulation layer 16 of the three conductors at the same position, thereby improving production efficiency.

[0060] In one embodiment, reference is made to Figures 5 to 7 The light string 100 also includes multiple housings 40. A circuit board 20 is installed in the mounting cavity of a housing 40, and the plane where the circuit board 20 is located is taken as the reference plane. The housing 40 includes a base 42 and a light-transmitting cover 41. The light-transmitting cover 41 covers the base 42, and the base 42 and the light-transmitting cover 41 enclose the mounting cavity. One of the base 42 and the light-transmitting cover 41 has a splicing surface 43, and the other has a mating surface 44 corresponding to the splicing surface 43. The splicing surface 43 and the mating surface 44 enclose the wire passage 45. The extension direction of the wire passage 45 is set at an angle with the reference plane. The first wire 12, the second wire 13 and the third wire 14 are inserted through the wire passage 45 at the upper limit of their extension direction.

[0061] In this embodiment, the housing 40 consists of a base 42 and a light-transmitting cover 41. The light-transmitting cover 41 covers the base 42, and the two together form a mounting cavity for accommodating the circuit board 20 and its related components. This protects the circuit board 20 from external environmental influences, and the design of the light-transmitting cover 41 allows the light-emitting effect of the light-emitting component 21 to be better displayed.

[0062] The base 42 and the light-transmitting cover 41 are connected by a splicing surface 43 and a mating surface 44, forming a wire passage 45 for wires to pass through. The wires are confined and fixed within the wire passage 45, thereby securing the position of the circuit board 20 within the housing 40 and preventing the solder on the solder joints 25 from falling off due to wire pulling, which could lead to circuit disconnection. This ensures stable power transmission of the power line 10. For example, the extension direction of the wire passage 45 forms an angle with the reference plane, meaning the wires form a bent structure in the extension direction. This increases the friction between the wires and the housing 40, preventing the wires from sliding freely and ensuring the positional stability of the circuit board 20. Furthermore, a bent section can also be provided within the wire passage 45 to further enhance the bending structure, confining the wires within the wire passage 45. A material that increases friction can also be applied to the wire passage 45 to fix the wire position. The method of confining and passing the wires is not limited.

[0063] In one embodiment, the splicing surface 43 is provided with a protrusion 431, and the mating surface 44 is provided with a groove 432 corresponding to the protrusion 431. The wire passage 45 is opened between the protrusion 431 and the groove 432 so that the wire passage 45 is arched.

[0064] In this embodiment, a protrusion 431 is provided on the splicing surface 43, and a groove 432 corresponding to the protrusion 431 is provided on the mating surface 44. The cooperation between the protrusion 431 and the groove 432 forms a bending area in the physical structure. The wire passage 45 is located in this area, and its shape is arched, which can guide the wire through the bending structure. When the wire passes through, it is constrained by the structure and cannot move at will, ensuring the stability of the wire within the wire passage 45. That is, the bending structure can effectively prevent the wire from loosening or shifting, enhance the stability of the wire, and ensure the fixed connection between the circuit board 20 and the housing 40.

[0065] In one embodiment, a plurality of limiting posts 421 are provided on the wall surface of the base 42 near the light-transmitting cover 41. The plurality of limiting posts 421 are arranged around the circuit board 20 at intervals, and the periphery of the circuit board 20 abuts against the limiting posts 421.

[0066] In this embodiment, a plurality of limiting posts 421 are protruding from the wall of the base 42 near the light-transmitting cover 41. These limiting posts 421 are arranged around the circuit board 20 at intervals, and the periphery of the circuit board 20 is limited to the limiting posts 421 to fix the circuit board 20 stably in the housing 40 and prevent the circuit board 20 from loosening.

[0067] Furthermore, any limiting post 421 has a lifting post 422 protruding from the wall near the circuit board 20, and the circuit board 20 overlaps the lifting post 422 to form an installation space between the circuit board 20 and the base 42, and the soldering part 11 is located in the installation space.

[0068] In this embodiment, by providing a lifting post 422 protruding from the wall of the limiting post 421 near the circuit board 20, an installation space is formed between the circuit board 20 and the base 42 to accommodate the solder part 11 on the circuit board 20, that is, the solder connection between the power line 10 and the circuit board 20, thereby ensuring that the solder part 11 will not come into direct contact with the base 42, and avoiding damage to the solder part 11 due to pressure or friction.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A string of lights, characterized in that, Includes a power cord for connecting the power connector and multiple circuit boards, among which, The power cord is provided with multiple soldering parts, and a circuit board is soldered to one of the soldering parts to make the circuit board electrically connected to the power cord. The power line includes at least a first conductor, a second conductor, and a third conductor arranged side by side and extending continuously. Each of the first conductor, the second conductor, and the third conductor has a plurality of soldering portions that are soldered to the circuit board. Any of the circuit boards is provided with a light-emitting component, the light-emitting component including at least a first light-emitting element, a second light-emitting element and a third light-emitting element, the positive electrode of the first light-emitting element is connected to the first wire, and the negative electrode is connected in parallel to the second wire and the third wire; The positive electrode of the second light-emitting element is connected to the second wire, and the negative electrode is connected in parallel to the first wire and the third wire; The positive electrode of the third light-emitting element is connected to the third wire, and the negative electrode is connected in parallel to the first wire and the second wire.

2. The light string as described in claim 1, characterized in that, A current-limiting resistor is provided on the connection path of the first light-emitting element, the second light-emitting element and the third light-emitting element.

3. The light string as described in claim 1, characterized in that, The first conductor, the second conductor, and the third conductor each include a metal core and an insulating layer that wraps around the metal core. A portion of the insulating layer is peeled off to expose the metal core, thereby forming the welded portion.

4. The light string as described in claim 3, characterized in that, The metal core is a thick copper wire.

5. The light string as described in claim 1, characterized in that, The circuit board has a first side and a second side facing away from each other, and the light-emitting component is mounted in the middle of the first side; The circuit board is provided with at least three conductive terminals that pass through the circuit board and are spaced apart. The conductive terminals are electrically connected to the light-emitting component and are provided corresponding to the light-emitting component. The second side is provided with a solder joint for each of the conductive terminals, and the first wire, the second wire and the third wire are respectively soldered to one of the solder joints.

6. The light string as described in claim 5, characterized in that, The plurality of conductive terminals are arranged side by side along the parallel direction of the first conductor, the second conductor, and the third conductor.

7. The light string as described in any one of claims 1 to 6, characterized in that, The light string also includes multiple housings, and a circuit board is installed in the mounting cavity of one of the housings, with the plane where the circuit board is located as the reference plane; The housing includes a base and a light-transmitting cover, the light-transmitting cover being fitted onto the base, and the base and the light-transmitting cover forming the mounting cavity; One of the base and the light-transmitting cover has a splicing surface, and the other has a mating surface corresponding to the splicing surface. The splicing surface and the mating surface enclose a wire passage. The extension direction of the wire passage is set at an angle to the reference surface. The first wire, the second wire, and the third wire pass through the wire passage at their upper limits in their extension directions.

8. The light string as described in claim 7, characterized in that, The splicing surface is provided with a protrusion, and the mating surface is provided with a groove corresponding to the protrusion. The wire passage is opened between the protrusion and the groove so that the wire passage is arched.

9. The light string as described in claim 7, characterized in that, The base has multiple limiting posts protruding from the wall near the light-transmitting cover. The multiple limiting posts are arranged around the circuit board at intervals, and the periphery of the circuit board abuts against the limiting posts.

10. The light string as described in claim 9, characterized in that, Each of the limiting posts has a raised post protruding from the wall near the circuit board, and the circuit board overlaps the raised post to form an installation space between the circuit board and the base, and the welding part is located in the installation space.

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