Positioning and cutting device for COB lamp strip

Abstract

The utility model discloses a kind of positioning cutting device for COB lamp strip, including discharging rack, base and cutting mechanism, positioning mechanism and the cutting mechanism corresponding cutting recess are equipped on base, positioning mechanism includes the sensing portion for sensing lamp strip starting end, the conveying portion for conveying lamp strip, the two limiting portions for fixing lamp strip cutting point both sides, sensing portion is slidably connected on base, the setting interval of cutting recess and sensing portion is set according to lamp strip cutting length requirement, positioning mechanism further include the controller electrically connected with sensing portion, cutting mechanism, two limiting portions, conveying portion.The beneficial effects of the utility model are that through the sensing portion of adjustable position, it is ensured that every section of cut lamp strip circuit is complete, functional normal, meets the process requirement of high-end application;With the cooperation through the two limiting portions respectively arranged on cutting point both sides, firm fixing can be formed to lamp strip in cutting instant, improve the stability and incision quality of cutting instant.

Description

Technical Field

[0001] This utility model relates to the technical field of LED strip processing equipment, and more specifically, it relates to a positioning and cutting device for COB LED strips. Background Technology

[0002] COB (Chip On Board) LED strips are an advanced surface light source product characterized by directly encapsulating LED chips onto a flexible circuit board, and then optically treating and protecting them with a continuous layer of phosphor colloid. This encapsulation structure results in extremely small chip spacing, forming a continuous and uniform light strip when emitting light. This effectively eliminates the graininess of traditional discrete LED strips, providing softer light and a better visual experience, making it widely used in decorative lighting, commercial lighting, and other fields. After production, the LED strips need to be cut to different lengths according to customer requirements, generally using cutting equipment or manual cutting with scissors.

[0003] The utility model patent with application number 202121508141.6 discloses a light strip cutting device. The device feeds the light strip through a roller, and the drive wheel and driven wheel work together to transport the light strip. The length is measured by a sensor. When the light strip reaches the set length, the upper cylinder and the lower cylinder drive the cutter to cut the light strip, thereby improving the efficiency of light strip cutting.

[0004] In the existing technology, although efficiency is improved, the cutting action of the cutting device is triggered entirely by the set moving length. As long as the length condition of the light strip is met, the cutting will be triggered. This cannot meet the process requirement that COB light strips must be cut at the cutting points of cutable circuit nodes (such as between pads) to ensure the integrity of each circuit function. In addition, there is no plane holding structure for flattening and fixing the two sides of the light strip cutting point during cutting. The light strip may have slight undulations, which will affect the stability and cut quality at the moment of cutting. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a positioning and cutting device for COB light strips.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A positioning and cutting device for COB LED strips includes a feeding rack for unwinding the LED strip, a base arranged along the unwinding direction of the LED strip, and a cutting mechanism for cutting the LED strip. Both the feeding rack and the cutting mechanism are mounted on the base. The base is provided with a positioning mechanism and a cutting groove corresponding to the cutting mechanism. The positioning mechanism includes a sensing part for sensing the starting end of the LED strip, a conveying part for conveying the LED strip, and two limiting parts for fixing both sides of the cutting point of the LED strip. The feeding rack, the conveying part, one limiting part, the cutting mechanism, the other limiting part, and the sensing part are arranged sequentially on the base along the LED strip conveying direction. The sensing part slides on the base so that the spacing between the cutting groove and the sensing part is set according to the LED strip cutting length requirement. The positioning mechanism also includes a controller electrically connected to the sensing part, the cutting mechanism, the two limiting parts, and the conveying part.

[0008] Further configured, the sensing part is an ultrasonic sensor, a guide groove with a T-shaped cross-section is opened on one side of the base, a connecting block is provided on the base that is slidably connected to the guide groove, and a mounting plate for installing the ultrasonic sensor is fixed on the connecting block. The cross-section of the connecting block is T-shaped and engages with the guide groove.

[0009] Further configured, the limiting part includes a C-shaped fixing frame, a servo motor, an eccentric wheel, two telescopic modules, a pressing plate, and a pressure sensor. The two ends of the C-shaped fixing frame are respectively fixed to the two sides of the base. One end of each of the two telescopic modules is respectively fixed to the two ends of the pressing plate, and the other end of each of the two telescopic modules is fixed to the base. The servo motor is fixed to the C-shaped fixing frame. The eccentric wheel is fixed to the output end of the servo motor and cooperates with the pressing plate. The pressure sensor is fixed to the surface of the base and is located directly below the pressing plate. The controller is electrically connected to the servo motor and pressure sensor of the two limiting parts.

[0010] Further configured, the telescopic module includes a guide tube passing through the base, a telescopic spring inside the guide tube, and a connecting rod movably connected to the guide tube. The two ends of the spring are respectively fixed to the inner wall at the bottom of the guide tube and one end of the connecting rod, and the other end of the connecting rod is fixed to the pressing plate.

[0011] Further configured, the cutting mechanism includes a fixed plate, a cylinder and a cutter. The two ends of the fixed plate are respectively mounted on the C-shaped fixing brackets of the two limiting parts. The cylinder is fixed on the fixed plate, the cutter is fixed on the cylinder output end and corresponds to the cutting groove, and the controller is electrically connected to the cylinder.

[0012] A further provision is that the pressing plate is covered with an elastic rubber pad that facilitates flexible contact with the surface of the light strip.

[0013] Further configured, the conveying unit includes two conveying rollers for conveying the light strip to the sensing unit, two drive motors for driving the two conveying rollers to rotate synchronously, and a side plate for fixing the two drive motors. The side plate is fixed on the base, and the controller is electrically connected to the two drive motors.

[0014] Further configured, the feeding rack includes a mounting column fixed on the base, a fixing rod rotatably connected to the mounting column for mounting the LED strip roll, and a rotating motor for driving the fixing rod to rotate. The fixing rod is provided with threads and a baffle for limiting the LED strip roll. The baffle is provided with threaded holes and is threadedly connected to the fixing rod through the threaded holes. The rotating motor is electrically connected to the controller.

[0015] By adopting the above technical solution, the beneficial effects of this utility model are as follows: the position-adjustable sensing part can accurately locate the cutting point at the cuttable circuit node of the COB light strip (such as between adjacent pads), ensuring that the circuit of each cut light strip is complete and functional, meeting the process requirements of high-end applications; in conjunction with the two limiting parts respectively set on both sides of the cutting point, and combined with the elastic rubber pad to flexibly hold the light strip, the light strip can be firmly fixed at the moment of cutting, effectively preventing the light strip from shifting, deforming or producing slight undulations, thereby ensuring the flatness, verticality and consistency of the cut, and improving the stability and cut quality at the moment of cutting. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the pressing plate and the telescopic module working together.

[0018] Figure 3 This is a schematic diagram of the structure for the guide slot and the connecting block to mate.

[0019] Figure 4 This is a schematic diagram of the structure of the baffle and the threaded hole.

[0020] Figure 5 This is the control flow diagram for the controller.

[0021] In the diagram: feeding rack 100, base 1, cutting mechanism 200, cutting groove 2, sensing part 300, conveying part 400, limiting part 500, light strip 600, guide slot 3, connecting block 4, mounting plate 5, C-shaped fixing bracket 6, servo motor 7, eccentric wheel 8, telescopic module 9, pressing plate 10, pressure sensor 11, guide tube 91, spring 92, connecting rod 93, fixing plate 12, cylinder 13, cutter 14, elastic rubber pad 15, conveying roller 16, drive motor 17, side plate 18, mounting column 19, fixing rod 20, rotating motor 21, baffle 22, threaded hole 221. Detailed Implementation

[0022] Reference Figures 1 to 5 The embodiments of this utility model will be further described below.

[0023] A positioning and cutting device for COB LED strips includes a feeding rack 100 for unwinding LED strip 600, a base 1 arranged along the unwinding direction of LED strip 600, and a cutting mechanism 200 for cutting LED strip 600. Both the feeding rack 100 and the cutting mechanism 200 are mounted on the base 1. The base 1 is provided with a positioning mechanism and a cutting groove 2 corresponding to the cutting mechanism 200. The positioning mechanism includes a sensing part 300 for sensing the starting end of LED strip 600, a conveying part 400 for conveying LED strip 600, and a part for fixing LED strip 600. Two limiting parts 500 on both sides of the cutting point, a feeding rack 100, a conveying part 400, one limiting part 500, a cutting mechanism 200, another limiting part 500, and a sensing part 300 are sequentially arranged on the base 1 along the light strip 600. The positioning mechanism also includes a controller electrically connected to the sensing part 300, the cutting mechanism 200, the two limiting parts 500, and the conveying part 400. The sensing part 300 slides on the base 1 so that the setting distance between the cutting groove 2 and the sensing part 300 is set according to the cutting length requirement of the light strip 600.

[0024] The sensing unit 300 is an ultrasonic sensor. A T-shaped guide groove 3 is opened on one side of the base 1. A connecting block 4 is provided on the base 1 and slides in the guide groove 3. A mounting plate 5 for installing the ultrasonic sensor is fixed on the connecting block 4 so as to enable the sensing unit 300 to slide on the base 1. This allows the setting distance between the cutting groove 2 and the sensing unit 300 to be set according to the cutting length requirements of the light strip 600. The cross-section of the connecting block 4 is T-shaped and engages with the guide groove 3 to prevent the connecting block 4 from disengaging from the sliding groove when sliding in the guide groove 3 and affecting the sliding of the sensing unit 300 on the base 1.

[0025] The conveying unit 400 includes two conveying rollers 16 for conveying the light strip 600 to the sensing unit 300, two drive motors 17 for driving the two conveying rollers 16 to rotate synchronously, and a side plate 18 for fixing the two drive motors 17. The side plate 18 is fixed on the base 1. The controller is electrically connected to the two drive motors 17 for synchronously controlling the two drive motors 17 to drive the two conveying rollers 16 to rotate synchronously to convey the light strip 600.

[0026] The limiting part 500 includes a C-shaped fixing frame 6, a servo motor 7, an eccentric wheel 8, two telescopic modules 9, a pressing plate 10, and a pressure sensor 11. The two ends of the C-shaped fixing frame 6 are respectively fixed to the two sides of the base 1. One end of each of the two telescopic modules 9 is respectively fixed to the two ends of the pressing plate 10, and the other end of each of the two telescopic modules 9 is fixed to the base 1. The servo motor 7 is fixed to the C-shaped fixing frame 6. The eccentric wheel 8 is fixed to the output end of the servo motor 7 and cooperates with the pressing plate 10. The pressure sensor 11 is fixed to the surface of the base 1 and is located directly below the pressing plate 10. The controller is electrically connected to the servo motor 7 and the pressure sensor 11 of the two limiting parts 500.

[0027] The cutting mechanism 200 includes a fixed plate 12, a cylinder 13 and a cutter 14. The two ends of the fixed plate 12 are respectively mounted on the C-shaped fixing brackets 6 of the two limiting parts 500. The cylinder 13 is fixed on the fixed plate 12. The cutter 14 is fixed on the output end of the cylinder 13 and corresponds to the cutting groove 2. The controller is electrically connected to the cylinder 13.

[0028] Working principle: Before operation, the worker precisely determines the cuttable circuit node between adjacent pads according to the target cutting length. The position of the sensing unit 300 (ultrasonic sensor) is slidably adjusted on the base 1 so that the straight-line distance between the cutting groove 2 and the sensing unit 300 is equal to the required cutting length of the LED strip 600. Thus, when the sensing unit 300 senses the starting end of the LED strip 600, the position on the LED strip 600 corresponding to the cutting groove 2 is the cuttable circuit node (such as between adjacent pads). In this way, the position-adjustable sensing unit 300 can accurately locate the cutting point on the cuttable circuit node on the COB LED strip 600, ensuring that the circuit of each cut LED strip 600 segment is complete and functions normally, meeting the process requirements of high-end applications.

[0029] The controller (such as a PLC) starts the unloading rack 100 to unwind the LED strip 600 and controls the synchronous rotation of the drive motor 17 of the conveying unit 400. The drive roller 16 smoothly pulls the LED strip 600 out of the unloading rack 100 and conveys it forward. As the LED strip 600 is conveyed, its starting end gradually approaches the sensing unit 300. When the starting end of the LED strip 600 reaches the position of the sensing unit 300, the ultrasonic sensor is triggered and sends a signal to the controller. After receiving the sensing signal, the controller immediately sends a command to the servo motors 7 of the two limit units 500. The two servo motors 7 synchronously drive their respective eccentric wheels 8 to rotate, pushing the pressing plate 10 downward. At this time, the pressing plate 10 is compressed by the spring 92 of the telescopic module 9 and moves smoothly downward to apply pressure to the LED strip 600, thereby firmly pressing the LED strip 600 on both sides of the cutting point. This process is completed instantly, which makes it easy to firmly fix the LED strip 600 during the subsequent cutting process. This effectively prevents the LED strip 600 from shifting, deforming or producing slight undulations during the subsequent cutting process, thereby ensuring the flatness, perpendicularity and consistency of the cut, and improving the stability and cut quality during the cutting process.

[0030] While the pressing plate 10 presses down on the light strips 600 on both sides of the cutting point, the pressure sensor 11 detects the pressure applied by the pressing plate 10 to the light strips 600 and sends a signal to the controller to control the cylinder 13 of the cutting mechanism 200 to move, driving the cutter 14 to quickly rush down and cooperate with the cutting groove 2 of the base 1 to complete the clean and neat cutting of the light strips 600, forming a light strip 600 segment of the target length.

[0031] When the pressure sensor 11 detects that the pressure applied by the pressing plate 10 to the light strip 600 has reached the preset pressure value (the preset pressure value of the pressure sensor 11 is the same as the pressure required for the pressing plate 10 to fix the light strip 600), it sends a signal to the controller to control the cylinder 13 of the cutting mechanism 200 to operate. At the same time, the controller also controls the drive motor 17 of the conveying unit 400 to stop working to prevent the light strip 600 from continuing to be conveyed during cutting and affecting the cutting.

[0032] After the 600 segments of the LED strip are cut, the controller controls the cylinder 13 to retract and the servo motor 7 to reverse, causing the limit part 500 to lift. The conveying part 400 then starts again to convey the next segment of the LED strip 600. Since the position of the sensing part 300 is fixed, the length of the next segment will automatically repeat the preset precise value. After the sensing part 300 senses the starting end of the next segment of the LED strip 600, it repeats the above steps of fixing and cutting the LED strip 600, thereby realizing continuous and high-precision cutting of the cuttable circuit nodes of the COB LED strip 600.

[0033] The telescopic module 9 includes a guide tube 91 passing through the base 1, a telescopic spring 92 inside the guide tube 91, and a connecting rod 93 movably connected to the guide tube 91. The two ends of the spring 92 are respectively fixed to the inner wall of the bottom of the guide tube 91 and one end of the connecting rod 93, and the other end of the connecting rod 93 is fixed to the pressing plate 10.

[0034] The guide tube 91 provides precise vertical guidance for the movement of the connecting rod 93 and the spring 92, preventing the pressing plate 10 from tilting. After cutting, the servo motor 7 drives the corresponding eccentric wheel 8 to rotate and push the pressing plate 10 downward, compressing the spring 92. When the eccentric wheel 8 continues to rotate 180 degrees to remove the push on the pressing plate 10, the spring 92 returns to its original state, allowing the pressing plate 10 to quickly and smoothly reset and lift.

[0035] The pressing plate 10 is covered with an elastic rubber pad 15 that facilitates flexible contact with the surface of the LED strip 600. The elastic rubber pad 15 increases the static friction between the pressing plate 10 and the smooth surface of the COB LED strip 600, which can more effectively prevent the LED strip 600 from sliding laterally under the impact of cutting, ensuring accurate cut position. The softness of the elastic rubber pad 15 can distribute the applied pressure more evenly over a larger contact area, making it easier for the pressing plate 10 to firmly and evenly press and fix the LED strip 600, and also avoiding direct contact between the pressing plate 10 and the surface of the LED strip 600, which could damage the LED strip 600.

[0036] The feeding rack 100 includes a mounting column 19 fixed on the base 1, a fixing rod 20 rotatably connected to the mounting column 19 for mounting the LED strip 600 roll, and a rotating motor 21 for driving the fixing rod 20 to rotate. The fixing rod 20 is provided with threads and a baffle 22 for limiting the LED strip 600 roll. The baffle 22 is provided with a threaded hole 221 and is threadedly connected to the fixing rod 20 through the threaded hole 221. The rotating motor 21 is electrically connected to the controller.

[0037] The threaded baffle 22 can firmly clamp LED strips 600 rolls of different widths, preventing them from moving laterally on the fixed rod 20 and affecting the conveying alignment. At the same time, the threaded connection also facilitates quick disassembly and replacement of new LED strips 600 rolls.

[0038] The rotating motor 21 drives the fixed rod 20 to rotate, causing the feeding rack 100 to actively feed out the light strip 600, instead of relying solely on the conveyor 400 to passively pull it from the stationary roll. This reduces the tension acting on the light strip 600 during the conveying process, avoiding stretching deformation or even damage to the internal circuitry caused by the pulling, and also preventing the problem that the conveyor 400 cannot pull the light strip 600 due to its excessive weight.

[0039] When the pressure sensor 11 detects the pressure applied to the light strip 600 by the pressing plate 10 and sends a signal to the controller to control the cylinder 13 of the cutting mechanism 200 to operate, the controller simultaneously controls the drive motor 17 of the conveying section 400 and the rotation motor 21 of the unloading rack 100 to stop working. This prevents the unloading rack 100 from continuing to unwind when the conveying section 400 stops conveying the light strip 600. When the controller controls the drive motor 17 of the conveying section 400 to start working, it will also synchronously control the rotation motor 21 of the unloading rack 100 to start working. This facilitates the flatness and consistency of the light strip 600 during the conveying and positioning process, which is beneficial for subsequent precise positioning and cutting.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a cuttable orientation, or be constructed and operated in a cuttable orientation, and therefore should not be construed as a limitation of this utility model.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning and cutting device for COB LED strip lights, comprising a feeding rack (100) for unwinding an LED strip (600), a base (1) arranged along the unwinding direction of the LED strip (600), and a cutting mechanism (200) for cutting the LED strip (600), wherein the feeding rack (100) and the cutting mechanism (200) are both mounted on the base (1), characterized in that, The base (1) is provided with a positioning mechanism and a cutting groove (2) corresponding to the cutting mechanism (200). The positioning mechanism includes a sensing part (300) for sensing the starting end of the light strip (600), a conveying part (400) for conveying the light strip (600), and two limiting parts (500) for fixing the two sides of the cutting point of the light strip (600). The feeding rack (100), the conveying part (400), one limiting part (500), the cutting mechanism (200), the other limiting part (500), and the sensing part (300) are arranged sequentially on the base (1) along the light strip (600). The sensing part (300) slides on the base (1) so that the setting distance between the cutting groove (2) and the sensing part (300) is set according to the cutting length requirement of the light strip (600). The positioning mechanism also includes a controller that is electrically connected to the sensing part (300), the cutting mechanism (200), the two limiting parts (500), and the conveying part (400).

2. The positioning and cutting device for COB LED strips according to claim 1, characterized in that, The sensing part (300) is an ultrasonic sensor. A guide slot (3) with a T-shaped cross-section is opened on one side of the base (1). A connecting block (4) is provided on the base (1) and is slidably connected to the guide slot (3). An mounting plate (5) for installing the ultrasonic sensor is fixed on the connecting block (4). The cross-section of the connecting block (4) is T-shaped and engages with the guide slot (3).

3. The positioning and cutting device for COB LED strips according to claim 1, characterized in that, The limiting part (500) includes a C-shaped fixing frame (6), a servo motor (7), an eccentric wheel (8), two telescopic modules (9), a pressing plate (10), and a pressure sensor (11). The two ends of the C-shaped fixing frame (6) are respectively fixed to the two sides of the base (1). One end of the two telescopic modules (9) is respectively fixed to the two ends of the pressing plate (10), and the other end of the two telescopic modules (9) is fixed to the base (1). The servo motor (7) is fixed to the C-shaped fixing frame (6). The eccentric wheel (8) is fixed to the output end of the servo motor (7) and cooperates with the pressing plate (10). The pressure sensor (11) is fixed to the surface of the base (1) and is located directly below the pressing plate (10). The controller is electrically connected to the servo motor (7) and the pressure sensor (11) of the two limiting parts (500).

4. The positioning and cutting device for COB LED strips according to claim 3, characterized in that, The telescopic module (9) includes a guide tube (91) passing through the base (1), a telescopic spring (92) inside the guide tube (91), and a connecting rod (93) movably connected to the guide tube (91). The two ends of the spring (92) are fixed to the inner wall of the bottom of the guide tube (91) and one end of the connecting rod (93), respectively, and the other end of the connecting rod (93) is fixed to the pressing plate (10).

5. A positioning and cutting device for COB LED strips according to claim 3, characterized in that, The cutting mechanism (200) includes a fixed plate (12), a cylinder (13) and a cutter (14). The two ends of the fixed plate (12) are respectively mounted on the C-shaped fixing brackets (6) of the two limiting parts (500). The cylinder (13) is fixed on the fixed plate (12). The cutter (14) is fixed on the output end of the cylinder (13) and corresponds to the cutting groove (2). The controller is electrically connected to the cylinder (13).

6. A positioning and cutting device for COB LED strips according to claim 3, characterized in that, The pressing plate (10) is covered with an elastic rubber pad (15) that facilitates flexible contact with the surface of the light strip (600).

7. A positioning and cutting device for COB LED strips according to claim 1, characterized in that, The conveying unit (400) includes two conveying rollers (16) for conveying the light strip (600) to the sensing unit (300), two drive motors (17) for driving the two conveying rollers (16) to rotate synchronously respectively, and a side plate (18) for fixing the two drive motors (17). The side plate (18) is fixed on the base (1), and the controller is electrically connected to the two drive motors (17).

8. A positioning and cutting device for COB LED strips according to claim 1, characterized in that, The feeding rack (100) includes a mounting column (19) fixed on the base (1), a fixing rod (20) rotatably connected to the mounting column (19) for mounting the LED strip (600) roll, and a rotating motor (21) for driving the fixing rod (20) to rotate. The fixing rod (20) is provided with threads, and the fixing rod (20) is provided with a baffle (22) for limiting the LED strip (600) roll. The baffle (22) is provided with a threaded hole (221) and is threadedly connected to the fixing rod (20) through the threaded hole (221). The rotating motor (21) is electrically connected to the controller.

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