LED light bar dispensing valve mechanism

Abstract

The invention belongs to the technical field of dispensing valves, and particularly relates to an LED light bar dispensing valve mechanism which comprises a front flow guide shaft tube and a rear flow guide shaft tube, and the front flow guide shaft tube and the rear flow guide shaft tube are horizontally, coaxially and rotatably connected in a damping mode. The front glue outlet needle and the rear glue outlet needle are vertically arranged, the front glue outlet needle and the rear glue outlet needle are communicated with an inner cavity of the front flow guide shaft tube and an inner cavity of the rear flow guide shaft tube respectively, and when the front glue outlet needle and the rear glue outlet needle are assembled in place, the front glue outlet needle and the rear glue outlet needle are attached in parallel; the device further comprises a base, a movable cavity for fixed-axis rotation of the front flow guide shaft pipe and the rear flow guide shaft pipe is formed in the base, and avoiding windows for avoiding the front glue outlet needle and the rear glue outlet needle are formed in the bottom face of the movable cavity. A glue feeding module for supplying glue to an inner cavity of the front flow guide shaft tube is arranged on the base; synchronous glue discharging of two pieces of glue can be achieved through the front glue discharging needle and the rear glue discharging needle which can be unfolded or combined, and the problem that the product quality is poor due to the defects of a traditional glue dispensing valve is solved.

Description

Technical Field

[0001] The invention relates to the technical field of glue dispensing valves, and in particular to a glue dispensing valve mechanism for an LED light strip. Background Art

[0002] A dispensing machine is an automated device used to apply fluid drops to products. Applicable fluids include adhesives, solid glue, paint, conductive glue, AB glue, polyurethane glue, etc. The dispensing valve is one of the important components of the dispensing machine and is used to control the output of the fluid. The working performance of the dispensing valve directly affects the dispensing accuracy of the dispensing machine.

[0003] In the processing of LED light strips, one of the processes is to seal the lamp beads on the light strips with glue. At present, most of the dispensing valves of existing dispensing equipment are fixed dispensing methods, with only one glue outlet to seal the lamp beads along the light strip. However, this single dispensing packaging method is very likely to cause horizontal wavy edges on both sides of the glue due to the large width of the glue. Therefore, it is necessary to pre-set glue with a smaller width on both sides of the lamp beads. However, since the distance between the two glues is extremely small, in order to match this distance, the current industry practice is to set two glues separately through two dispensing valves that are offset front and back and arranged side by side.

[0004] However, since the traditional dispensing valve itself is large in size, and the front-to-back staggered arrangement makes the distance between the two dispensing valve outlets larger, the front ends of the left and right glues cannot be attached to the light bar at the same time, which leads to inconsistent cooling of the glue on the left and right sides of the same point on the light bar, resulting in an asymmetric contact interface between the filling glue subsequently filled in the middle of the light bar and the glue on its left and right sides, which will affect the appearance and quality of the product. In addition, the structural method of arranging the glue outlets in a front-to-back staggered manner will also increase the difficulty of controlling the glue. Therefore, it is necessary to improve the existing technology. Summary of the invention

[0005] The object of the present invention is to provide a dispensing valve mechanism for an LED light strip to solve the problems raised in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: an LED light bar dispensing valve mechanism, comprising a front guide shaft tube and a rear guide shaft tube, wherein the front guide shaft tube and the rear guide shaft tube are horizontally coaxially connected in damping rotation;

[0007] Also includes a front glue discharge needle and a rear glue discharge needle arranged vertically, the front glue discharge needle and the rear glue discharge needle are respectively connected with the inner cavity of the front flow guide shaft tube and the rear flow guide shaft tube, and when assembled in place, the front glue discharge needle and the rear glue discharge needle are parallel and attached;

[0008] The invention also includes a base, wherein a movable cavity is provided in the base for the front flow guide shaft tube and the rear flow guide shaft tube to rotate on a fixed axis, and an avoidance window is provided on the bottom surface of the movable cavity for avoiding the front glue dispensing needle and the rear glue dispensing needle;

[0009] Wherein, a glue feeding module for supplying glue to the inner cavity of the front guide shaft tube is provided on the base.

[0010] The LED light bar dispensing valve mechanism of the present invention further comprises a synchronous driving module for driving the front guide shaft tube and the rear guide shaft tube to rotate synchronously and in opposite directions.

[0011] The LED light strip dispensing valve mechanism described in the present invention, wherein the synchronous drive module includes a front rack and a rear rack, a synchronous gear that drives the front rack and the rear rack to move synchronously in opposite directions, and a first motor that drives the synchronous gear to rotate; annular meshing parts are coaxially provided on the outer side walls of the front guide shaft tube and the rear guide shaft tube, and the front rack and the rear rack are respectively meshed with the two annular meshing parts.

[0012] The LED light strip dispensing valve mechanism described in the present invention, wherein the synchronous drive module is arranged above the front guide shaft tube; the synchronous gear is located between the front rack and the rear rack, and the opposite side walls of the front rack and the rear rack are provided with guide grooves adapted to the synchronous gear along the length direction, and the vertical inner wall of the guide groove is provided with a bar-shaped meshing portion meshing with the synchronous gear.

[0013] The LED light strip dispensing valve mechanism described in the present invention, wherein the base includes a front guide seat and a rear mounting seat horizontally opposite to each other, and the opposite side walls of the front guide seat and the rear mounting seat are respectively provided with two mounting grooves that are axially adapted to the front guide shaft tube and the rear guide shaft tube, and the bottom surfaces of the adjacent ends of the two mounting grooves are provided with notches facing each other, the two mounting grooves enclose the active cavity, and the two notches enclose the avoidance window.

[0014] The LED light strip dispensing valve mechanism described in the present invention, wherein the front guide seat and the rear mounting seat are detachably connected along the front-to-back direction, and when assembled in place, the rear mounting seat presses the rear guide shaft tube coaxially against the front guide shaft tube.

[0015] The LED light strip dispensing valve mechanism described in the present invention, wherein the glue feed module includes a horizontal flow channel coaxially connected to the front guide shaft tube, a vertical flow channel vertically connected to the horizontal flow channel, a glue feed channel obliquely connected to the vertical flow channel, and a glue feed screw arranged in the vertical flow channel, and a second motor driving the glue feed screw to rotate; the vertical flow channel is located above the horizontal flow channel and is both arranged in the front guide seat, the end of the glue feed channel away from the vertical flow channel passes through the upper surface of the front guide seat, and the second motor is located at the upper end of the front guide seat.

[0016] The LED light strip dispensing valve mechanism described in the present invention is characterized in that a sealing portion is provided in one end of the rear guide shaft tube facing the front guide shaft tube, and a connecting shaft adapted to the inner cavity of the front guide shaft tube is convexly provided at one end of the sealing portion away from the rear guide shaft tube; a drainage groove connected to the inner cavity of the front guide shaft tube is axially provided on the side wall of the connecting shaft away from the rear glue discharge needle, and a drainage groove parallel to the drainage groove is provided on the inner wall of the front guide shaft tube, and when the rear guide shaft tube is rotated into place, the drainage groove and the inner cavity of the front guide shaft tube are connected through the drainage groove.

[0017] The LED light strip dispensing valve mechanism described in the present invention is characterized in that the guide grooves are provided in plurality and are evenly arranged along the circumferential direction of the rear guide shaft tube.

[0018] The LED light strip dispensing valve mechanism described in the present invention is characterized in that a receiving groove is provided on the end surface of one end of the connecting shaft extending into the front guide shaft tube, and the receiving groove is provided with two and opposite to each other on the left and right, and the receiving groove passes through the side wall of the connecting shaft, and a buckle parallel to the connecting shaft is provided on the inner wall of the receiving groove which is perpendicular to the connecting shaft, and a protruding buckle extending out of the receiving groove is provided at the end of the buckle which is away from the axis of the connecting shaft, and an arc-shaped buckle groove for the movement of the protruding buckle is provided circumferentially on the inner wall of the front guide shaft tube.

[0019] Compared with the prior art, the present invention has the following beneficial effects: by adjusting the rotation angle of the front guide shaft tube and the rear guide shaft tube, the front glue discharge needle and the rear glue discharge needle can be separated or closed and maintained at a certain angle state; when the angle is zero, the glue at the two intersections can be merged into one glue discharge; when the angle is not zero, the two glues can be discharged synchronously; when the two glues can be discharged, the two glue discharge needles can simultaneously discharge the glue attached to the light strip, and the solidification degree can be kept synchronized, thereby ensuring the appearance and quality of the product; and the discharging method of the two glues only needs to be achieved by one dispensing valve, which is more conducive to the control of the glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a front view of the present invention.

[0022] Figure 2 for Figure 1 AA section view in.

[0023] Figure 3 for Figure 2 An enlarged view of the front guide shaft tube and the rear guide shaft tube in FIG.

[0024] Figure 4 for Figure 3 Separate diagram of the front guide shaft tube and the rear guide shaft tube.

[0025] Figure 5 It is a front view of the rear guide shaft tube of the present invention.

[0026] Figure 6 for Figure 5 Enlarged view of the middle snap-in location.

[0027] Figure 7 for Figure 1 BB section view in.

[0028] Figure 8 for Figure 7 A magnified view of the local structure.

[0029] Fig. 9 It is a side view of the present invention.

[0030] Fig.10 It is a top view of the present invention. DETAILED DESCRIPTION

[0031] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0034] Moreover, the terms "up, down, left, right, upper end, lower end, longitudinal" and the like indicating directions are all based on the posture and position of the device or equipment described in this solution during normal use.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0036] This embodiment discloses Figures 1 to 10 The LED light bar dispensing valve mechanism shown includes a front guide shaft tube 10 and a rear guide shaft tube 20, and the front guide shaft tube 10 and the rear guide shaft tube 20 are horizontally coaxially damped and rotatably connected, so that the two can be kept in a certain arc state during the coaxial rotation process; wherein, the inner cavity of the front guide shaft tube 10 runs through both ends thereof, and the inner cavity of the rear guide shaft tube 20 only runs through the end surface of the front guide shaft tube 10 close to one end thereof and is connected to the front guide shaft tube 10;

[0037] The mechanism also includes a front glue needle 30 and a rear glue needle 40 which are arranged vertically. The front glue needle 30 and the rear glue needle 40 are respectively connected vertically with the inner cavity of the front flow guide shaft tube 10 and the rear flow guide shaft tube 20. When assembled in place, the front glue needle 30 and the rear glue needle 40 are parallel and attached. Specifically, the cross-sections of the front glue needle 30 and the rear glue needle 40 are both semicircular, and when they are closed, they form a cylindrical structure. Of course, the shape can also be designed as a prismatic structure. Further, the front glue needle 30 and the rear glue needle 40 are respectively integrally processed and formed with the front flow guide shaft tube 10 and the rear flow guide shaft tube 20.

[0038] The mechanism also includes a base 50, in which an active cavity 501 is provided for the front flow guide shaft tube 10 and the rear flow guide shaft tube 20 to rotate in a fixed axis. An avoidance window 502 for avoiding the front glue needle 30 and the rear glue needle 40 is provided on the bottom surface of the active cavity 501. The angle between the front glue needle 30 and the rear glue needle 40 can be adjusted conveniently through the avoidance window 502, and the front flow guide shaft tube 10 and the rear flow guide shaft tube 20 can be kept in a stable axial rotation through the active cavity 501. After being assembled, the front flow guide shaft tube 10 and the rear flow guide shaft tube 20 are damped and slidably fitted with the inner walls of the two active cavities 501, so as to further play the role of positioning and holding the glue needles.

[0039] In addition, by setting a rotating drive mechanism (not shown) on the top of the base 50, the width of the rubber strip can be changed by adjusting the left and right inclination of the front glue needle 30 and the rear glue needle 40 in the side-by-side direction. That is to say, when the front glue needle 30 and the rear glue needle 40 are side by side along a straight line in the left and right direction, the width of the rubber strip output at this time is the sum of the widths of the two rubber strips output from the two outlets of the front glue needle 30 and the rear glue needle 40. When the side-by-side direction has an angle with the aforementioned straight line in the horizontal direction, the width of the rubber strip output at this time will decrease, and the minimum width is the left and right width of any one outlet of the front glue needle 30 and the rear glue needle 40.

[0040] The base 50 is provided with a glue feeding module 60 for supplying glue to the inner cavity of the front guide shaft tube 10 . The glue feeding module 60 can be arranged on the front side or the upper side of the base 50 , and is preferably generally arranged on the upper part of the base 50 .

[0041] During operation, by adjusting the rotation angle of the front guide shaft tube 10 and the rear guide shaft tube 20, the front glue needle 30 and the rear glue needle 40 can be separated or closed and kept at a certain angle. When the angle is zero, one line of glue can be discharged, and when the angle is not zero, two lines of glue can be discharged synchronously. When the two lines of glue are kept in a state where two lines of glue can be discharged, the solidification degree of the glue attached to the light bar flowing out from the two glue needles at the same time can be kept synchronous and consistent, thereby ensuring the appearance and quality of the product, and being more conducive to the synchronous control of the early start stage of glue and the later glue collection.

[0042] In this embodiment, the mechanism further includes a synchronous drive module 70 for driving the front guide shaft tube 10 and the rear guide shaft tube 20 to rotate synchronously in the opposite direction, so as to realize automatic adjustment of the deflection angle of the front guide shaft tube 10 and the rear guide shaft tube 20, and then adjust the angle between the front glue needle 30 and the rear glue needle 40 through the background system as needed. Of course, the synchronous drive module 70 can be set to realize the synchronous drive of the front guide shaft tube 10 and the rear guide shaft tube 20 in the opposite direction, or two can be set to realize the synchronous drive of the front guide shaft tube 10 and the rear guide shaft tube 20 respectively, and different rotation modes can be used according to actual needs.

[0043] When the two synchronous drive modules 70 are selected, additional work can be achieved, that is, one of the glue dispensing needles can be retracted and blocked, and the other glue dispensing needle can be moved to an inclined angle. This inclined state can be used to dispense glue for horizontal or inclined glue dispensing slots. Compared with the traditional implementation method of using an additional deflection module to tilt the entire glue dispensing valve, the method provided by this embodiment has higher control accuracy and smaller volume. Of course, the two glue dispensing needles can also be adjusted to tilt synchronously side by side, which can achieve the purpose of increasing the glue output on the basis of the above work.

[0044] Preferably, the present embodiment adopts a method of setting only one synchronous drive module 70, specifically, the synchronous drive module 70 includes a front rack 71 and a rear rack 72, a synchronous gear 73 driving the front rack 71 and the rear rack 72 to move synchronously in the opposite direction, and a first motor 74 driving the synchronous gear 73 to rotate. An annular meshing portion 80 is coaxially provided on the outer side wall of the front guide shaft tube 10 and the rear guide shaft tube 20, and the front rack 71 and the rear rack 72 are respectively meshed with the two annular meshing portions 80 to realize the meshing drive of the front guide shaft tube 10 and the rear guide shaft tube 20.

[0045] Among them, the synchronous drive module 70 is arranged above the front guide shaft tube 10; the synchronous gear 73 is located between the front rack 71 and the rear rack 72, and the opposite side walls of the front rack 71 and the rear rack 72 are provided with guide grooves 90 adapted to the synchronous gear along the length direction, and the vertical inner wall of the guide groove 90 is provided with a bar-shaped meshing portion 91 meshing with the synchronous gear 73. Through the synchronous meshing of the synchronous gear 73 with the front rack 71 and the rear rack 72, the front rack 71 and the rear rack 72 are synchronously moved in the opposite direction, thereby driving the front guide shaft tube 10 and the rear guide shaft tube 20 to rotate in the opposite direction. When the synchronous gear 73 rotates in the opposite direction, the idle travel between the tooth grooves on the left and right sides and the front rack 71 and the rear rack 72 is offset, thereby ensuring the synchronization of the front rack 71 and the rear rack 72, directly avoiding the error accumulation of the rack transmission in time, and further ensuring the long-term accuracy of dispensing.

[0046] Moreover, the setting of the guide groove 90 can also ensure the horizontal consistency of the front rack 71 and the rear rack 72 with the synchronous gear 73, avoiding the relative displacement of the front rack 71 and the rear rack 72 with the annular meshing part 80 in the longitudinal direction, resulting in a decrease in transmission accuracy.

[0047] In addition, the rack drive method has another advantage, which is that it is convenient to set multiple front guide shaft tubes and rear guide shaft tubes along the length direction of the rack, thereby realizing the dispensing processing of multiple rows of light strips, which is convenient for further improving the processing efficiency.

[0048] In this embodiment, the base 50 includes a front guide seat 51 and a rear mounting seat 52 which are horizontally opposite to each other. Two mounting grooves 503 which are fixedly adapted to the front guide shaft tube 10 and the rear guide shaft tube 20 are respectively provided on the opposite side walls of the front guide seat 51 and the rear mounting seat 52. The two mounting grooves 503 are both cylindrical. The bottom surfaces of the adjacent ends of the two mounting grooves 503 are provided with notches 504 facing each other. The two mounting grooves 503 enclose the active cavity 501, and the two notches 504 enclose the avoidance window 502, so as to facilitate the installation and removal of the front guide shaft tube 10 and the rear guide shaft tube 20 by disassembling the front guide seat 51 and the rear mounting seat 52, which is more conducive to the later maintenance.

[0049] Specifically, the rear mounting seat 52 is in a horizontal L-shape, the front air guide seat 51 can be set in a cubic shape and a recessed step 511 is provided at the lower end of its rear side wall, which is aligned with the longitudinal end 521 of the rear mounting seat 52. The mounting groove 503 on the front air guide seat 51 is located on the vertical side wall 5110 of the recessed step 511, and the mounting groove 503 on the rear mounting seat 52 is provided on the vertical side wall 5210 of the longitudinal end 521. After assembly, the outer side wall of the longitudinal end 521 of the rear mounting seat 52 is flush with the side wall of the front air guide seat 51, and the inner side wall of the transverse end 522 is closely attached to the side end surface of the front air guide seat 51.

[0050] Correspondingly, the first motor 74 and the synchronous gear 73 are both located in the lateral end 522 of the rear mounting seat 52, and the rear rack 72 is also arranged inside the rear mounting seat 52 and parallel to its longitudinal end 521, and the two ends respectively penetrate the opposite side walls of the longitudinal end 521 and the lateral end 522 of the front mounting seat. One end of the front rack 71 is located in the lateral end 522, and the other end extends into the front guide seat 51 and penetrates the left and right side walls thereof. The mounting grooves 503 in the front guide seat 51 and the rear mounting seat 52 are respectively directly connected to the two chambers 100 inside thereof for the reciprocating motion of the front rack 71 and the rear rack 72, so that after installation, the front rack 71 and the rear rack 72 can be respectively engaged and driven with the front guide shaft tube 10 and the rear guide shaft tube 20.

[0051] In this embodiment, the front guide seat 51 and the rear mounting seat 52 are detachably connected in the front-to-back direction. When assembled in place, the rear mounting seat 52 presses the rear guide shaft tube 20 coaxially against the front guide shaft tube 10 to ensure sealing while providing damping force for the coaxial relative rotation of the rear guide shaft tube 20 and the front guide shaft tube 10, so as to maintain the appropriate inclination angle during the adjustment of the two glue discharge needles.

[0052] In this embodiment, the glue feeding module 60 includes a horizontal flow channel 61 coaxially connected to the front guide shaft tube 10, a vertical flow channel 62 vertically connected to the horizontal flow channel 61, a glue feeding flow channel 63 obliquely connected to the vertical flow channel 62, and a glue feeding screw 64 arranged in the vertical flow channel 62, and a second motor 65 driving the glue feeding screw 64 to rotate; the vertical flow channel 62 is located above the horizontal flow channel 61 and both are arranged in the front guide seat 51, and the glue feeding flow channel 63 and the end of the vertical flow channel 62 away from the vertical flow channel 62 both pass through the front guide seat The upper surface of 51 is used to connect the glue inlet pipe; the second motor 65 is arranged at the upper end of the front guide seat 51 to drive the glue inlet screw 64 in the vertical flow channel 62 to rotate forward and reverse. After being installed in place, the glue inlet screw 64 is located at the lower side of the outlet of the glue inlet flow channel 63. When the glue inlet screw 64 rotates fully, the glue is pressed into the horizontal flow channel 61 and enters the front guide shaft tube 10 and is squeezed out through the glue outlet needle. When the glue inlet screw 64 reverses, the glue in the glue outlet needle and the horizontal flow channel 61 is sucked back, thereby stopping the dispensing and preventing the glue from dripping.

[0053] In addition, in order to further cooperate with the back-sucking operation of the glue feeding screw 601, a piston 601 that can move up and down is provided on the upper part of the vertical flow channel 62. The piston 601 is slidably sleeved on the upper end smooth part 641 of the glue feeding screw 64. When the glue feeding screw 64 realizes back-sucking of glue, the piston 601 moves up, and when the glue feeding screw 64 squeezes the glue downward, the piston 601 relies on its own weight to squeeze the glue downward and place it horizontally in the flow channel. In order to ensure the normal downward movement of the piston, a spring 602 can be provided on the upper side of the piston to assist in resetting.

[0054] In this embodiment, a sealing portion 201 is provided at one end of the rear flow guide shaft tube 20 facing the front flow guide shaft tube 10, which is used to seal the inner cavity opening of the rear flow guide shaft tube 20, so that the inner cavities of the front flow guide shaft tube 10 and the rear flow guide shaft tube 20 are isolated; a connecting shaft 120 adapted to the inner cavity of the front flow guide shaft tube 10 is convexly provided at one end of the sealing portion 201 away from the rear flow guide shaft tube 20. After assembly, the outer wall of the connecting shaft 120 slides and fits with the inner cavity side wall of the front flow guide shaft tube 10, and can achieve synchronous rotation with the rear flow guide shaft tube 20. A drainage groove 121 connected to its inner cavity is axially provided on the side wall of the connecting shaft 120 away from the rear glue discharge needle 40, that is, the drainage groove 121 is located on the upper side wall of the connecting shaft 120. On the inner wall of the front guide shaft tube 10, a guide groove 102 parallel to the guide groove 121 is provided. When the rear guide shaft tube 20 is rotated into place, the adjacent ends of the guide groove 121 and the guide groove 102 overlap, and the guide groove 121 and the inner cavity of the front guide shaft tube 10 are connected through the guide groove 102, so that the glue in the front guide shaft tube 10 enters the rear guide shaft tube 20, thereby realizing synchronous glue discharge of the front glue needle 30 and the rear glue needle 40; and when the rear guide shaft tube 20 is rotated to other positions, the guide groove 102 is offset from the adjacent end of the guide groove 121, thereby realizing cutting off the glue discharge of the rear glue needle 40, thereby realizing glue discharge of only the front glue needle 30. In the actual processing process, it can be selected according to different needs whether one glue needle discharges glue or two glue needles discharge glue synchronously for processing, which can adapt to more production needs.

[0055] Specifically, when the front glue discharge needle 30 and the rear glue discharge needle 40 are both vertical and side by side, the drainage groove 121 and the guide groove 102 are staggered, and glue is only discharged through the front glue discharge needle 30; and when the front guide shaft tube 10 and the rear guide shaft tube 20 are relatively rotated by a certain arc, the drainage groove 121 on the connecting shaft 120 is aligned with the guide groove 102 and is connected. At this time, the outlet spacing between the front glue discharge needle 30 and the rear glue discharge needle 40 reaches the set spacing, and the glue enters the two glue discharge needles synchronously through the front guide shaft tube 10 and the rear guide shaft tube 20 and flows out, realizing synchronous dispensing of two glues at a certain distance, so that under the synchronous drive of the second motor 65, synchronous glue discharge or separate glue discharge at different angles can still be achieved, which is convenient for operators to switch operations corresponding to different mode processes, greatly facilitating processing and production.

[0056] In order to match the needs of adjusting multiple different spacings, multiple guide grooves 102 are provided and are evenly arranged along the circumferential direction of the rear guide shaft tube 20. When the front guide shaft tube 10 and the rear guide shaft tube 20 are rotated in reverse to the preset positions in turn, the guide groove 121 can be connected with the guide groove 102 at the corresponding position, so that the glue in the front guide shaft tube 10 enters the rear guide shaft tube 20 and is discharged through the rear glue outlet needle 40, thereby realizing the spacing adjustment of the two glues, and realizing multi-angle morphology changes and multi-mode dispensing functions.

[0057] In this embodiment, a receiving groove 130 is provided on the end surface of one end of the connecting shaft 120 extending into the front guide shaft tube 10, and two receiving grooves 130 are provided and are opposite to each other on the left and right. The receiving groove 130 passes through the side wall of the connecting shaft 120, and a snap-fitting member 140 parallel to the connecting shaft 120 is provided on the inner wall of the receiving groove 130 which is perpendicular to the connecting shaft 120. The snap-fitting member, the sealing portion and the connecting shaft are all integrally connected with the rear guide shaft tube, and the snap-fitting member can be deformed and bent toward the axis of the connecting shaft to realize a certain resettable deformation function. A protruding clip 131 extending out of the accommodating groove 130 is provided at one end of the clip 140 away from the axis of the connecting shaft 120, and an arc-shaped clip groove 103 for the protruding clip 131 to move is provided on the inner wall of the front guide shaft tube 10 in the circumferential direction; during assembly, the connecting shaft 120 is inserted into the front guide shaft tube 10, and the protruding clip 131 is clipped into the arc-shaped clip groove 103, thereby realizing the coaxial rotation connection between the front guide shaft tube 10 and the rear guide shaft tube 20, so as to facilitate the integrated assembly and disassembly; and in order to facilitate the disassembly of the front guide shaft tube 10 and the rear guide shaft tube 20, a groove 141 that is easy to operate can be provided on the end surface of the clip 140. During disassembly, a tool is extended into the front guide shaft tube 10 and inserted into the groove 141. At this time, the protruding clip 131 on the clip 140 can be forcefully moved out of the arc-shaped clip groove 103, thereby realizing disassembly and separation.

[0058] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A dispensing valve mechanism for an LED light bar, characterized in that: It comprises a front flow guide shaft tube and a rear flow guide shaft tube, wherein the front flow guide shaft tube and the rear flow guide shaft tube are horizontally coaxially connected in damping rotation; Also includes a front glue discharge needle and a rear glue discharge needle arranged vertically, the front glue discharge needle and the rear glue discharge needle are respectively connected with the inner cavity of the front flow guide shaft tube and the rear flow guide shaft tube, and when assembled in place, the front glue discharge needle and the rear glue discharge needle are parallel and attached; The invention also includes a base, wherein a movable cavity is provided in the base for the front flow guide shaft tube and the rear flow guide shaft tube to rotate on a fixed axis, and an avoidance window is provided on the bottom surface of the movable cavity for avoiding the front glue dispensing needle and the rear glue dispensing needle; Wherein, a glue feeding module for supplying glue to the inner cavity of the front guide shaft tube is provided on the base.

2. The LED light strip dispensing valve mechanism according to claim 1, characterized in that: The LED light strip dispensing valve mechanism also includes a synchronous driving module that drives the front guide shaft tube and the rear guide shaft tube to rotate synchronously and in opposite directions.

3. The LED light strip dispensing valve mechanism according to claim 2, characterized in that: The synchronous drive module includes a front rack and a rear rack, a synchronous gear that drives the front rack and the rear rack to move synchronously in opposite directions, and a first motor that drives the synchronous gear to rotate; annular meshing parts are coaxially provided on the outer side walls of the front guide shaft tube and the rear guide shaft tube, and the front rack and the rear rack are respectively meshed with the two annular meshing parts.

4. The LED light strip dispensing valve mechanism according to claim 3, characterized in that: The synchronous drive module is arranged above the front guide shaft tube; the synchronous gear is located between the front rack and the rear rack, and the opposite side walls of the front rack and the rear rack are provided with guide grooves adapted to the synchronous gear along the length direction, and the vertical inner wall of the guide groove is provided with a bar-shaped meshing portion meshing with the synchronous gear.

5. The LED light strip dispensing valve mechanism according to claim 4, characterized in that: The base includes a front guide seat and a rear mounting seat which are horizontally opposite to each other. The front guide seat and the rear mounting seat are respectively provided with two mounting grooves which are axially adapted to the front guide shaft tube and the rear guide shaft tube. The bottom surfaces of the adjacent ends of the two mounting grooves are provided with notches facing each other. The two mounting grooves enclose the active cavity, and the two notches enclose the avoidance window.

6. The LED light strip dispensing valve mechanism according to claim 5, characterized in that: The front guide seat and the rear mounting seat are detachably connected along the front-to-back direction. When assembled in place, the rear mounting seat presses the rear guide shaft tube coaxially against the front guide shaft tube.

7. The LED light strip dispensing valve mechanism according to claim 6, characterized in that: The glue feeding module includes a horizontal flow channel coaxially connected to the front guide shaft tube, a vertical flow channel vertically connected to the horizontal flow channel, a glue feeding channel obliquely connected to the vertical flow channel, and a glue feeding screw arranged in the vertical flow channel, and a second motor driving the glue feeding screw to rotate; the vertical flow channels are located above the horizontal flow channels and are both arranged in the front guide seat, the end of the glue feeding channel away from the vertical flow channel passes through the upper surface of the front guide seat, and the second motor is located at the upper end of the front guide seat.

8. The LED light strip dispensing valve mechanism according to any one of claims 1 to 7, characterized in that: A sealing portion is provided in the rear flow guide shaft tube at one end facing the front flow guide shaft tube, and a connecting shaft adapted to the inner cavity of the front flow guide shaft tube is protruded from the end of the sealing portion away from the rear flow guide shaft tube; A drainage groove connected to the inner cavity of the connecting shaft is axially provided on the side wall of the connecting shaft away from the rear glue discharge needle, and a drainage groove parallel to the drainage groove is provided on the inner wall of the front guide shaft tube. When the rear guide shaft tube is rotated into place, the drainage groove and the inner cavity of the front guide shaft tube are connected through the drainage groove.

9. The LED light strip dispensing valve mechanism according to claim 7, characterized in that: The guide grooves are provided in plurality and are evenly arranged along the circumferential direction of the rear guide shaft tube.

10. The LED light strip dispensing valve mechanism according to claim 8, characterized in that: A receiving groove is provided on the end surface of one end of the connecting shaft extending into the front guide shaft tube, and two receiving grooves are provided and are opposite to each other on the left and right. The receiving groove passes through the side wall of the connecting shaft, and a buckle parallel to the connecting shaft is provided on the inner wall of the receiving groove which is perpendicular to the connecting shaft, and a protruding buckle extending out of the receiving groove is provided at the end of the buckle which is away from the axis of the connecting shaft, and an arc-shaped buckle groove for the protruding buckle to move is provided circumferentially on the inner wall of the front guide shaft tube.

Images