CN112902042A

CN112902042A - Production method of four-wire point-control LED color lamp string

Info

Publication number: CN112902042A
Application number: CN202110159759.4A
Authority: CN
Inventors: 单西万; 李群林; 杨土秀; 艾云东; 张�杰
Original assignee: Zhuhai Bojay Electronics Co Ltd
Current assignee: Zhuhai Bojay Electronics Co Ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-06-04

Abstract

The invention discloses a production method of a four-wire point control LED color lamp string, which comprises the following steps: s1, an upper positive lead, a first signal wire, a second signal wire and a negative lead; s2, removing the insulation layers of the positive electrode lead, the first signal wire, the second signal wire and the negative electrode lead at set intervals; s3, coating welding materials; s4, conveying RGB-LEDs; s5, welding the RGB-LED with the positive lead, the signal wire and the negative lead; s6, disconnecting the first signal line or the second signal line; s7, detecting the welding quality of the RGB-LED; and S8, packaging the RGB-LED in the packaging colloid to form a lamp bead. The production method of the four-wire point control LED color lamp string provided by the invention realizes the automatic production of the four-wire point control LED color lamp string, and omits the step of using a burner to distribute addresses for each lamp bead, so the production cost is low and the production efficiency is high.

Description

Production method of four-wire point-control LED color lamp string

Technical Field

The invention relates to the technical field of illumination, in particular to a production method of a four-wire point control LED color lamp string.

Background

The processing of traditional LED colored lamp cluster, generally the use is welded a plurality of different colour LEDs in same position, through external power supply controller, realizes the colour change, and the product control mode is single. Or the burning lamp beads are welded on the lead, then the burner is used for burning the lamp string, and corresponding addresses are distributed to each lamp bead, so that multi-color lighting is realized. The production method ensures that the multi-color LED lamp string has high production cost and low production efficiency.

Disclosure of Invention

In view of the current state of the prior art, the invention aims to provide a production method of a four-wire point control LED color lamp string with low production cost and high production efficiency.

In order to solve the technical problem, the invention provides a production method of a four-wire point control LED color lamp string, which comprises the following steps:

s1, an upper positive lead, a first signal wire, a second signal wire and a negative lead;

s2, removing the insulating layers of the positive electrode lead, the first signal wire, the second signal wire and the negative electrode lead at set intervals to expose the lead cores of the positive electrode lead, the first signal wire, the second signal wire and the negative electrode lead so as to form a positive electrode welding spot, a first signal welding spot, a second signal welding spot and a negative electrode welding spot respectively;

s3, coating welding materials on the surfaces of the positive electrode welding spot, the first signal welding spot, the second signal welding spot and the negative electrode welding spot;

s4, conveying the first RGB-LED and the second RGB-LED one by one to the positions below the positive electrode welding point, the first signal welding point, the second signal welding point and the negative electrode welding point coated with welding materials at intervals;

s5, welding the positive electrode welding foot, the signal input welding foot, the signal output welding foot and the negative electrode welding foot of the first RGB-LED or welding the positive electrode welding foot, the signal output welding foot, the signal input welding foot and the negative electrode welding foot of the second RGB-LED with the positive electrode welding spot, the first signal welding spot, the second signal welding spot and the negative electrode welding spot respectively;

s6, detecting the welding quality of the first RGB-LED or the second RGB-LED;

s7, alternately disconnecting the first signal line between two adjacent first signal welding spots or the second signal line between two adjacent second signal welding spots; and

s8, packaging the first RGB-LED or the second RGB-LED in a packaging colloid to form a lamp bead.

In one embodiment, the step of welding the positive electrode terminal, the signal input terminal, the signal output terminal, and the negative electrode terminal of the first RGB-LED or the positive electrode terminal, the signal output terminal, the signal input terminal, and the negative electrode terminal of the second RGB-LED to the positive electrode pad, the first signal pad, the second signal pad, and the negative electrode pad, respectively, includes:

driving the first RGB-LED or the second RGB-LED to move upwards to enable the positive electrode welding foot, the signal input welding foot, the signal output welding foot and the negative electrode welding foot of the first RGB-LED or the positive electrode welding foot, the signal output welding foot, the signal input welding foot and the negative electrode welding foot of the second RGB-LED to be respectively contacted with or close to the positive electrode welding spot, the first signal welding spot, the second signal welding spot and the negative electrode welding spot; and

and pressing the positive electrode welding spot, the first signal welding spot, the second signal welding spot and the negative electrode welding spot from top to bottom by using a welding head, so that the welding material is melted, and the positive electrode welding spot, the signal input welding spot, the signal output welding spot and the negative electrode welding spot of the RGB-LED are respectively welded with the positive electrode welding spot, the first signal welding spot, the second signal welding spot and the negative electrode welding spot.

In one embodiment, the step of driving the first RGB-LED or the second RGB-LED to move upward to make the positive electrode terminal, the signal input terminal, the signal output terminal, and the negative electrode terminal of the first RGB-LED or the positive electrode terminal, the signal output terminal, the signal input terminal, and the negative electrode terminal of the second RGB-LED contact or approach the positive electrode pad, the first signal pad, the second signal pad, and the negative electrode pad, respectively, includes:

placing the first RGB-LED or the second RGB-LED in a positioning groove at the upper end of a mandril capable of moving up and down;

when the ejector rod moves to the positions below the positive electrode welding point, the first signal welding point, the second signal welding point and the negative electrode welding point, an ejector wheel is driven to move to the position below the ejector rod, and the lower end of the ejector rod slides along the cylindrical surface of the ejector wheel so as to drive the ejector rod to move upwards.

In one embodiment, the step of feeding the first RGB-LED or the second RGB-LED one by one to the lower side of the positive electrode pad, the first signal pad, the second signal pad and the negative electrode pad coated with the soldering material includes:

conveying a first RGB-LED on the first RGB-LED material belt or a second RGB-LED on the second RGB-LED material belt to a material taking position;

sucking the first RGB-LED or the second RGB-LED from the material taking position, and turning over the first RGB-LED or the second RGB-LED to enable the positive electrode welding leg, the signal input welding leg, the signal output welding leg and the negative electrode welding leg of the first RGB-LED or the second RGB-LED to be upward;

sucking the turned first RGB-LED or the turned second RGB-LED, and placing the first RGB-LED or the turned second RGB-LED in a positioning groove on a feeding tray; and

and rotating the feeding plate to convey the first RGB-LED or the second RGB-LED to the positions below the positive electrode welding point, the first signal welding point, the second signal welding point and the negative electrode welding point.

In one embodiment, the step of removing the insulation layers of the positive electrode wire, the first signal wire, the second signal wire and the negative electrode wire at set intervals to expose the wire cores thereof to form a positive electrode pad, a first signal pad, a second signal pad and a negative electrode pad, respectively, includes:

fixing the positive electrode lead, the first signal line, the second signal line, and the negative electrode lead;

cutting off the insulating layers of the positive wire, the first signal wire, the second signal wire and the negative wire and pulling the insulating layers to one side to expose the wire cores of the positive wire, the first signal wire, the second signal wire and the negative wire so as to form a positive welding spot, a first signal welding spot, a second signal welding spot and a negative welding spot; and

and forming the positions of the positive electrode welding spot, the first signal welding spot, the second signal welding spot and the negative electrode welding spot, which are close to the insulation layer fracture corresponding to the positive electrode welding spot, the first signal welding spot, the second signal welding spot and the negative electrode welding spot into a bent shape.

In one embodiment, the curved shape is a Z-shape.

In one embodiment, the curved shape is a V-shape.

In one embodiment, the step of fixing the positive electrode wire, the first signal wire, the second signal wire, and the negative electrode wire includes:

providing a lower pressing block, wherein a groove or a bulge is arranged on the bottom surface of the lower pressing block;

providing an upper pressing block which is oppositely arranged above the lower pressing block, wherein a bulge or a groove matched with the groove or the bulge is arranged on the bottom surface of the upper pressing block; and

and the upper pressing block is driven to move downwards relative to the lower pressing block, and the protrusion is matched with the groove to clamp and punch the positive electrode lead, the first signal wire, the second signal wire and the negative electrode lead into a bent shape.

In one embodiment, the step of packaging the first RGB-LED or the second RGB-LED in a packaging colloid to form a bead further includes:

and conveying the lamp beads to a hanging ornament assembly station, and sleeving decorative parts on the outer parts of the lamp beads at the hanging ornament assembly station.

The invention provides a production method of a four-wire point control LED color lamp string, which comprises the following steps:

s3, alternately disconnecting the first signal line between two adjacent first signal welding spots and the second signal line between two adjacent second signal welding spots;

s4, coating welding materials on the surfaces of the positive electrode welding spot, the first signal welding spot, the second signal welding spot and the negative electrode welding spot;

s5, conveying the first RGB-LED or the second RGB-LED one by one to the positions below the positive electrode welding point, the first signal welding point, the second signal welding point and the negative electrode welding point coated with welding materials;

s6, welding the positive electrode welding foot, the signal input welding foot, the signal output welding foot and the negative electrode welding foot of the first RGB-LED or welding the positive electrode welding foot, the signal output welding foot, the signal input welding foot and the negative electrode welding foot of the second RGB-LED with the positive electrode welding spot, the first signal welding spot, the second signal welding spot and the negative electrode welding spot respectively;

s7, detecting the welding quality of the first RGB-LED or the second RGB-LED; and

The production method of the four-wire point control LED color lamp string provided by the invention realizes the automatic production of the four-wire point control LED color lamp string, and omits the step of using a burner to distribute addresses for each lamp bead, so the production cost is low and the production efficiency is high.

The advantageous effects of the additional features of the present invention will be explained in the detailed description section of the present specification.

Drawings

Fig. 1 is a schematic front view of a four-wire point-control LED color lamp string according to a first embodiment of the present invention;

FIG. 2 is a rear view of the four-wire point-controlled LED color light string shown in FIG. 1;

FIG. 3 is a flow chart of a method for producing the four-wire point-controlled LED color light string shown in FIG. 1;

FIG. 4 is a schematic view of a positive electrode lead in one of its shapes after the lead core is formed;

FIG. 5 is a schematic view of another shape of the wire core of the positive electrode lead after molding;

FIG. 6 is a flowchart of a method for producing a four-wire point-controlled LED color lamp string according to a second embodiment of the present invention;

FIG. 7 is a perspective view of a four-wire point-controlled LED color lamp string according to a third embodiment of the present invention;

FIG. 8 is a perspective view of a four-wire point-controlled LED color lamp string according to a fourth embodiment of the present invention;

fig. 9 is a flow chart of a method for producing the four-wire point-control LED color lamp string shown in fig. 7 and 8.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

Fig. 1 is a schematic front view of a four-wire point-control LED color lamp string according to a first embodiment of the present invention, and fig. 2 is a rear view of the four-wire point-control LED color lamp string shown in fig. 1. As shown in fig. 1 and 2, the four-wire point-control LED color light string in this embodiment includes an anode wire 11, a first signal wire 17, a second signal wire 18, a cathode wire 13, a plurality of first RGB-LEDs 14a, a plurality of second RGB-LEDs 14b, and a plurality of encapsulant 15, wherein the anode wire 11, the first signal wire 17, the second signal wire 18, and the cathode wire 13 are sequentially arranged side by side, the anode wire 11, the first signal wire 17, the second signal wire 18, and the cathode wire 13 are respectively provided with a plurality of anode pads 113, a plurality of first signal pads 171, a plurality of second signal pads 181, and a plurality of cathode pads 131 arranged at intervals along an axial direction thereof, and the first signal wire 17 between two adjacent first pad signals 171 and the second signal wire 18 between two adjacent second pad signals 181 are alternately disconnected along a length direction of the light string, the plurality of anode pads 113, the first signal wires 17, the second signal wires 113, the second signal pads 181, and the, The plurality of first signal pads 171, the plurality of second signal pads 181, and the plurality of negative pads 131 correspond one-to-one to form a plurality of LED mounting areas.

The plurality of first RGB-LEDs 14a and the plurality of second RGB-LEDs 14b are arranged along the length direction of the light string at intervals one by one and are respectively located at the plurality of LED mounting areas, each first RGB-LED14a comprises an anode welding foot 141, a signal input welding foot 143, a signal output welding foot 144 and a cathode welding foot 142 which are sequentially arranged, the anode welding foot 141, the signal input welding foot 143, the signal output welding foot 144 and the cathode welding foot 142 of each first RGB-LED14a are respectively welded with the anode welding foot 113, the first signal welding foot 171, the second signal welding foot 181 and the cathode welding foot 131 of the corresponding LED mounting area, each second RGB-LED14b comprises an anode welding foot 141, a signal output welding foot 144, a signal input welding foot 143 and a cathode welding foot 142 which are sequentially arranged, the anode welding foot 141, the signal output welding foot 144, the signal input welding foot 143 and the cathode welding foot 142 of each second RGB-LED14b are respectively welded with the anode welding foot 113, which is corresponding to the LED mounting area, The first signal pad 171, the second signal pad 181, and the negative pad 131.

The plurality of encapsulation colloid 15 are respectively coated on the plurality of first RGB-LEDs 14a and the plurality of first RGB-LEDs 14b to form a plurality of lamp beads.

Preferably, the point-controlled LED color light string further includes a plurality of insulating colloids 19 respectively coated at the disconnected positions of the first signal welding point 171 and the second signal welding point 181, so as to make the product beautiful.

When the device is used, the positive output end of the driving power supply is connected with the positive lead 11, the negative output end of the driving power supply is connected with the negative lead 13, and the signal output end of the driving power supply is connected with the first signal line or the second signal line. The control signal comprises a plurality of sections of data, each section of data comprises a first group of data, a second group of data, a third group of data, … … and an nth group of data, when the control signal is input into the driving chip of the first lamp bead, the driving chip of the first lamp bead intercepts the first group of data and then transmits the rest groups of data downwards through the first signal line or the second signal line, and the driving chip of the first lamp bead controls the red light chip, the green light chip and the blue light chip of the first lamp bead according to the first group of data; the driver chip of second lamp pearl dams behind the second group data and will remain group data and down transmit, and the driver chip of second lamp pearl controls red light chip, green glow chip and the blue light chip of second lamp pearl according to the second group data to analogize to realize the control of nth lamp pearl.

FIG. 3 is a flow chart of a method for producing the four-wire point-controlled LED color light string shown in FIG. 1. As shown in fig. 3, the production method comprises the steps of:

step S1, putting the wire on line: an upper line positive electrode wire 11, a first signal line 17, a second signal line 18, and a negative electrode wire 13. Specifically, the positive electrode lead 11, the first signal wire 17, the second signal wire 18 and the negative electrode lead 13 are fed through a feeding mechanism, the feeding mechanism comprises a coil rack for placing coil raw materials and a tension controller for controlling tension, and the tension controller comprises a plurality of tension pulleys.

Step S2, wire stripping: the insulating layers of the positive electrode wire 11, the first signal wire 17, the second signal wire 18, and the negative electrode wire 13 are removed at a set pitch interval to expose the cores thereof to form a positive electrode pad 113, a first signal pad 171, a second signal pad 181, and a negative electrode pad 131, respectively. Specifically, the positive lead 11, the first signal line 17, the second signal line 18 and the negative lead 13 are conveyed to a wire stripping station, a wire stripping mechanism is arranged at the wire stripping station, and the insulation layer 112 of the positive lead 11, the first signal line 17, the second signal line 18 and the negative lead 13 is removed through the wire stripping mechanism to form a positive welding spot 113, a first signal welding spot 171, a second signal welding spot 181 and a negative welding spot 131.

Preferably, the step of removing the insulating layer 112 of the positive electrode wire 11, the first signal wire 17, the second signal wire 18 and the negative electrode wire 13 at a set pitch interval to form the positive electrode pad 113, the first signal pad 171, the second signal pad 181 and the negative electrode pad 131 respectively includes:

step S21, fixing the positive electrode lead 11, the first signal wire 17, the second signal wire 18, and the negative electrode lead 13;

step S22, cutting the insulating layer 112 of the positive electrode wire 11, the first signal wire 17, the second signal wire 18 and the negative electrode wire 13 and pulling them to one side to expose the wire core 111 to form a positive electrode pad 113, a first signal pad 171, a second signal pad 181 and a negative electrode pad 131; and

step S23 is to form the positive electrode pad 113, the first signal pad 171, the second signal pad 181, and the negative electrode pad 131 into a bent shape at positions close to the corresponding insulating layer 112.

Since the insulating layer 112 is generally made of plastic or silicone rubber, which has elasticity, when the insulating layer 112 is released after the insulating layer 112 is cut and pulled to one side, the insulating layer 112 will rebound to the cut position, so that the exposed wire core 111 is too short to meet the requirement of welding strength. In the wire stripping method of the present embodiment, the positions of the positive electrode pad 113, the first signal pad 171, the second signal pad 181, and the negative electrode pad 131 close to the corresponding insulating layer 112 are formed into the curved shapes, so that the curved shapes can prevent the pulled insulating layer 112 from rebounding.

Fig. 4 is a schematic structural diagram of one shape of the positive electrode pad 113 formed near the insulating layer 112 corresponding to the positive electrode pad. As shown, the positive electrode pad 113 in this embodiment is formed in a zigzag shape at a position 115 near the insulating layer 112 corresponding thereto. Similarly, the signal pads and the negative pads 131 are also formed in a zigzag shape at positions close to the two cutouts of the insulating layer 112 corresponding thereto. Fig. 5 is a schematic structural diagram of another shape of the positive electrode pad 113 formed near the insulating layer 112 corresponding thereto. As shown in the figure, the positive electrode solder 113 in this embodiment is shaped into a V-shape at a position 115 near the corresponding insulating layer 112. Similarly, the signal pads and the negative pads 131 are also in a V shape near the two cutouts of the insulating layer 112 corresponding thereto.

Preferably, the step of fixing the positive electrode lead 11, the first signal line 17, the second signal line 18 and the negative electrode lead 13 includes:

providing a lower pressing block (not shown in the figure), wherein the bottom surface of the lower pressing block is provided with a groove or a bulge;

providing an upper pressing block (not shown in the figure) which is oppositely arranged above the lower pressing block, wherein the bottom surface of the upper pressing block is provided with a bulge or a groove which is matched with the groove or the bulge; and

the upper pressing block is driven to move downwards relative to the lower pressing block, and the protrusions and the grooves are matched to clamp and punch the positive electrode lead 11, the first signal wire 17, the second signal wire 18 and the negative electrode lead 13 into a bent shape (116 in fig. 4 and 5). After the insulating layer 112 is cut into a plurality of small segments, the friction between the insulating layer 112 and the conductor core 111 is reduced, so that the insulating layer 112 is easy to slide relative to the conductor core 111 along the axial direction, and the positive conductor 11, the first signal line 17, the second signal line 18 and the negative conductor 13 are punched into a bent shape, thereby achieving the effect of limiting the insulating layer 112 from moving.

Step S3, spot welding material: the surfaces of the positive electrode pad 113, the first signal pad 171, the second signal pad 181, and the negative electrode pad 131 are coated with a solder material. Specifically, the positive electrode pad 113, the first signal pad 171, the second signal pad 181, and the negative electrode pad 131 are conveyed to a spot welding material station by a wire feeding mechanism, the spot welding material station is provided with a spot welding material mechanism, and the positive electrode pad 113, the first signal pad 171, the second signal pad 181, and the negative electrode pad 131 are coated with a welding material by the spot welding material mechanism. In one embodiment, the spot welding material mechanism includes a spot tin cartridge, and the welding material is preferably a tin paste.

Step S4, feeding RGB-LED: the first RGB-LED14a and the second RGB-LED14b are fed under the positive electrode pad 113, the first signal pad 171, the second signal pad 181, and the negative electrode pad 131 coated with the soldering material at intervals one by one.

As shown in fig. 3, the step of feeding the first RGB-LED14a and the second RGB-LED14b to the lower side of the positive pad 113, the first signal pad 171, the second signal pad 181, and the negative pad 131 includes:

step S41, conveying the first RGB-LED14a on the first RGB-LED tape and the second RGB-LED14b on the second RGB-LED tape to a material taking position. Specifically, the first RGB-LED14a and the second RGB-LED14b are transported to the take-off location by vibrating trays or flights.

Step S42, the first RGB-LED14a or the second RGB-LED14b is sucked from the material-taking position, and then the first RGB-LED14a or the second RGB-LED14b is turned over so that the positive electrode solder 141, the signal input solder 143, the signal output solder 144, and the negative electrode solder 142 of the first RGB-LED14a or the second RGB-LED14b face upward. Specifically, the first RGB-LED14a or the second RGB-LED14b is adsorbed at the material taking position by the flipping robot, and the flipping robot rotates 180 degrees to make the positive electrode solder 141, the signal input solder 143, the signal output solder 144, and the negative electrode solder 142 of the first RGB-LED14a or the second RGB-LED14b face upward.

Step S43, the flipped first RGB-LED14a or second RGB-LED14b is sucked, and the first RGB-LED14a or second RGB-LED14b is placed in a positioning groove on the rotary feeding tray. Specifically, the first RGB-LED14a or the second RGB-LED14b is sucked by the transfer robot at the inverting robot, and the first RGB-LED14a or the second RGB-LED14b is transferred into the positioning groove on the feed tray.

Step S44, the rotary feed tray delivers the first RGB-LED14a or the second RGB-LED14b to the lower side of the positive electrode pad 113, the first signal pad 171, the second signal pad 181, and the negative electrode pad 131.

Preferably, the step of feeding the first RGB-LED14a or the second RGB-LED14b to the lower side of the positive solder pad 113, the first signal solder pad 171, the second signal solder pad 181 and the negative solder pad 131 further comprises:

step S45, detecting whether the first RGB-LED14a or the second RGB-LED14b and the first RGB-LED14a or the second RGB-LED14b are placed at the correct positions in the positioning groove. Specifically, the positioning groove is photographed by the CCD camera, and the computer determines whether the first RGB-LED14a or the second RGB-LED14b and whether the first RGB-LED14a or the second RGB-LED14b are placed at the correct position in the positioning groove according to the photograph.

Step S5, welding: the positive electrode pad 141, the signal input pad 143, the signal output pad 144, and the negative electrode pad 142 of the first RGB-LED14a or the positive electrode pad 141, the signal input pad 143, the signal output pad 144, and the negative electrode pad 142 of the second RGB-LED14b are soldered to the positive electrode pad 113, the first signal pad 171, the second signal pad 181, and the negative electrode pad 131, respectively.

The welding step specifically comprises the following steps:

step S61, driving the first RGB-LED14a or the second RGB-LED14b to move upward, so that the positive electrode pad 141, the signal input pad 143, the signal output pad 144, and the negative electrode pad 142 of the first RGB-LED14a or the positive electrode pad 141, the signal output pad 144, the signal input pad 143, and the negative electrode pad 142 of the second RGB-LED14b are respectively in contact with or close to the positive electrode pad 113, the first signal pad 171, the second signal pad 181, and the negative electrode pad 131. Specifically, the first RGB-LED14a or the second RGB-LED14b is placed in a positioning groove at the upper end of a push rod which can move up and down; when the push rod moves to the lower parts of the positive electrode welding point 113, the first signal welding point 171, the second signal welding point 181 and the negative electrode welding point 131, a push wheel is driven to move to the lower part of the push rod, so that the lower end of the push rod slides along the cylindrical surface of the push wheel, and the push rod is driven to move upwards.

Step S62, pressing the solder head on the positive solder joint 113, the first signal solder joint 171, the second signal solder joint 181, and the negative solder joint 131 from top to bottom, and melting the solder material to solder the positive solder joint 141, the signal input solder joint 143, the signal output solder joint 144, and the negative solder joint 142 of the first RGB-LED14a or the second RGB-LED14b to the positive solder joint 113, the first signal solder joint 171, the second signal solder joint 181, and the negative solder joint 131, respectively.

The traditional LED welding mode mainly comprises laser welding and hot air welding, and the laser welding has the following defects: 1. the adjustment of the welding mechanism is troublesome; 2. welding is unstable; 3. the welding yield is lower than the price; 4. during welding, tin slag is difficult to treat, and the tin slag falls into a positioning clamp after being accumulated too much, so that the tin slag is difficult to clean; 5. welding tin slag drops between lamp pearl pad, causes the short circuit easily. In order to solve the defect of laser welding, hot air welding is adopted, namely soldering tin is melted by a hot air blowing method, but the hot air blowing method easily causes the soldering tin on a welding spot to fall off, so that the welding is not firm. Compared with the laser welding and hot air welding modes, the welding method has the advantages of firm welding, simple structure and low welding cost.

Step S6, welding inspection: the soldering quality of the first RGB-LED14a or the second RGB-LED14b is detected. Specifically, the soldered first RGB-LED14a or second RGB-LED14b is conveyed to a soldering inspection station by a wire feeding mechanism, and the soldering quality of the first RGB-LED14a or second RGB-LED14b is inspected at the soldering inspection station by the soldering inspection mechanism. The welding detection mechanism comprises a positive electrode probe, a negative electrode probe and a signal probe, wherein the positive electrode probe and the negative electrode probe are used for electrifying the positive electrode lead 11 and the negative electrode lead 13, control signals are input to the first signal wire 17 through the signal probe, and then whether the first RGB-LED14a or the second RGB-LED14b emits light is detected to judge the welding effect of the first RGB-LED14a or the second RGB-LED14 b.

Step S7, disconnection: the first signal lines 17 between the adjacent two first signal pads 171 or the second signal lines 18 between the adjacent two second signal pads 181 are alternately disconnected. Specifically, the welding points of the positive electrode lead 11, the first signal wire 17, the second signal wire 18 and the negative electrode lead 13 are conveyed to a disconnection station through a wire feeding mechanism, a wire punching mechanism is arranged at the disconnection station and comprises a punching knife and an air cylinder for driving the punching knife to move downwards, and the first signal wire 17 and the second signal wire 18 are punched through the punching knife.

Step S8, packaging: and packaging the first RGB-LED14a or the second RGB-LED14b in a packaging colloid to form a lamp bead. Specifically, the detected first RGB-LED14a or second RGB-LED14b is conveyed to a packaging station through a wire feeding mechanism, and the first RGB-LED14a or second RGB-LED14b is packaged in the packaging colloid 15 through a dispensing mechanism at the packaging station to form a lamp bead. The glue dispensing mechanism comprises a glue dispensing mechanism for dispensing curing glue on the RGB-LED14 and a curing mechanism for curing the curing glue, wherein the curing glue can be UV glue.

The production method of the four-wire point control LED color lamp string realizes the automatic production of the four-wire point control LED color lamp string; moreover, an address does not need to be distributed to each lamp bead by using a burner, so that the production cost is low and the production efficiency is high.

Fig. 6 is a flowchart of a method for producing a four-wire point-control LED color lamp string according to a second embodiment of the present invention. As shown in the drawings, the production method of the four-wire point-control LED color lamp string in the present embodiment is substantially the same as that in the first embodiment, except that: the breaking step in this embodiment moves between the wire stripping step and the spot welding material step. Specifically, the production method of the four-wire point-control LED color lamp string in the embodiment includes the following steps:

step S1, putting the wire on line: an upper line positive electrode wire 11, a first signal line 17, a second signal line 18, and a negative electrode wire 13.

Step S2, wire stripping: the insulating layers of the positive electrode wire 11, the first signal wire 17, the second signal wire 18, and the negative electrode wire 13 are removed at a set pitch interval to expose the cores thereof to form a positive electrode pad 113, a first signal pad 171, a second signal pad 181, and a negative electrode pad 131, respectively.

Step S3, disconnection: the first signal lines 17 between the adjacent two first signal pads 171 and the second signal lines 18 between the adjacent two second signal pads 181 are alternately disconnected.

Step S4, spot welding material: the surfaces of the positive electrode pad 113, the first signal pad 171, the second signal pad 181, and the negative electrode pad 131 are coated with a solder material.

Step S5, feeding RGB-LED: the first RGB-LED14a or the second RGB-LED14b are fed under the positive electrode pad 113, the first signal pad 171, the second signal pad 181, and the negative electrode pad 131 coated with the soldering material one by one at intervals.

Step S6, welding: the positive electrode fillet, the signal input fillet, the signal output fillet, and the negative electrode fillet of the first RGB-LED14a or the positive electrode fillet, the signal output fillet, the signal input fillet, and the negative electrode fillet of the second RGB-LED14b are welded to the positive electrode pad 113, the first signal pad 171, the second signal pad 181, and the negative electrode pad 131, respectively.

Step S7, welding inspection: the soldering quality of the first RGB-LED14a or the second RGB-LED14b is detected.

Step S8, packaging: and packaging the first RGB-LED14a or the second RGB-LED14b in a packaging colloid to form a lamp bead.

Fig. 7 is a perspective view of a four-wire point-control LED color lamp string according to a third embodiment of the present invention. As shown in the drawings, the structure of the four-wire point-control LED color lamp string in the present embodiment is substantially the same as that in the first embodiment, except that: the four-wire point control LED color lamp string in the embodiment further comprises a plurality of decorating parts 16, wherein part or all of the decorating parts 16 are transparent or semitransparent, and the decorating parts 16 are respectively sleeved outside the lamp beads. The decoration 16 in this embodiment includes a first casing 161 and a second casing 162, the first casing 161 is made of a translucent material, the first casing 161 is an ellipsoid (or a sphere), an opening is provided on the first casing 161, the second casing 162 covers the opening, the second casing 162 and the first casing 161 form a containing cavity, and the LED lamp bead is contained in the containing cavity. The decorative part 16 can improve the beauty of the product and also can play a role in protecting the lamp beads.

Fig. 8 is a perspective view of a four-wire point-control LED color lamp string according to a fourth embodiment of the present invention. As shown in the drawings, the structure of the four-wire point-control LED color lamp string in the present embodiment is substantially the same as that in the third embodiment, except that the decoration 16 is an integral structure. When the lamp string is produced, the lamp string is coated outside the lamp bead in an injection molding mode.

Fig. 9 is a flowchart of a method for producing a four-wire point-control LED color lamp string according to a third embodiment and a fourth embodiment of the present invention. As shown in fig. 9, the manufacturing method in this embodiment is different from the first embodiment in that the steps of encapsulating the LED further include:

step S9, hanging decoration: the lamp beads are conveyed to a hanging ornament assembly station through a wire feeding mechanism, and the outer parts of the lamp beads are sleeved with decorating parts at the hanging ornament assembly station. Specifically, the decorating part is sleeved on the lamp bead in an injection molding or buckling mode. The decorative part can increase the beauty of the product and protect the lamp beads.

The positive electrode lead 11, the first signal line 17, the second signal line 18, and the negative electrode lead 13 are rubber wires, and the positive electrode lead 11, the first signal line 17, the second signal line 18, and the negative electrode lead 13 may be enameled wires besides rubber wires. After the positive electrode lead 11, the first signal line 17, the second signal line 18 and the negative electrode lead 13 are replaced by enameled wires, a person skilled in the art can easily think that the above-mentioned embodiment is adjusted accordingly, for example, the wire stripping mechanism is adjusted to a wire stripping mechanism suitable for the enameled wires, and therefore, the present invention will not be described in detail for this embodiment.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. A production method of a four-wire point control LED color lamp string is characterized by comprising the following steps:

s5, welding the positive electrode welding foot, the signal input welding foot, the signal output welding foot and the negative electrode welding foot of the first RGB-LED or the positive electrode welding foot, the signal output welding foot, the signal input welding foot and the negative electrode welding foot of the second RGB-LED with the positive electrode welding point, the first signal welding point, the second signal welding point and the negative electrode welding point respectively;

s6, detecting the welding quality of the first RGB-LED or the second RGB-LED;

s7, alternately disconnecting the first signal line between two adjacent first signal welding spots and the second signal line between two adjacent second signal welding spots; and

2. The method of claim 1, wherein the step of welding the positive, signal input, signal output, and negative electrode legs of the first RGB-LED or the positive, signal output, signal input, and negative electrode legs of the second RGB-LED to the positive, first, second, and negative electrode pads, respectively, comprises:

and pressing the positive electrode welding spot, the first signal welding spot, the second signal welding spot and the negative electrode welding spot from top to bottom by using a welding head, so that the welding material is melted to weld the positive electrode welding foot, the signal input welding foot, the signal output welding foot and the negative electrode welding foot of the first RGB-LED or the second RGB-LED with the positive electrode welding spot, the first signal welding spot, the second signal welding spot and the negative electrode welding spot respectively.

3. The method of claim 2, wherein the step of driving the first RGB-LED or the second RGB-LED upward such that the positive, signal input, signal output, and negative electrode pads of the first RGB-LED or the positive, signal output, signal input, and negative electrode pads of the second RGB-LED are in contact with or close to the positive, first, second, and negative electrode pads, respectively, comprises:

4. The method of claim 1, wherein the step of feeding the first RGB-LED or the second RGB-LED one by one to the underside of the positive solder joint, the first signal solder joint, the second signal solder joint and the negative solder joint coated with solder material comprises:

5. The method of claim 1, wherein the step of removing the insulation layers of the positive, first, second and negative wires at predetermined intervals to expose the wire cores thereof to form positive, first, second and negative solder joints, respectively, comprises:

6. The method of claim 5 in which the bend is Z-shaped.

7. The method of claim 5 in which the bend is V-shaped.

8. The method of claim 5, wherein the step of securing the positive, first, second and negative conductors includes:

9. The method for producing a four-wire point-controlled LED color light string as claimed in claim 1, wherein the step of encapsulating the first RGB-LED or the second RGB-LED in an encapsulant to form a bead further comprises:

10. A production method of a four-wire point control LED color lamp string is characterized by comprising the following steps: