A dispensing head and a dispensing device

Abstract

The present invention discloses a dispensing head and a dispensing device. The dispensing head includes a glue pipe and a bracket connected to each other. A plurality of flow channels are arranged inside the glue pipe. A sorting structure for sorting some fluorescent powders with small particle sizes into some of the flow channels is arranged inside the bracket. The sorting structure is connected to the corresponding flow channels and is arranged at the glue inlet of the corresponding flow channels. In this application, by setting the sorting structure, some fluorescent powders with small particle sizes are sorted into the corresponding flow channels, and the glue is discharged separately through the corresponding flow channels, while the other mixed fluorescent glue is discharged through other flow channels. The landing positions of the fluorescent powders with different particle sizes can be effectively controlled respectively, which is beneficial to improving the consistency of the landing positions of the CIE color coordinates of the lamp beads and improving the brightness of the LED lamp beads at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of dispensing, and particularly to a dispensing head and a dispensing device. Background Art

[0002] With the continuous development of Light Emitting Diodes (LEDs), its manufacturing process has become increasingly mature, and at the same time, the requirements for the yield and quality of LED products are getting higher and higher. During the production of LED lamp beads, it is necessary to dispense fluorescent glue on the LED chips. The existing fluorescent glue for the dispensing method includes mixed fluorescent powder, and the dispensing equipment cannot well control the landing points of fluorescent powders with different particle sizes, resulting in poor consistency of the landing points of the CIE color coordinates of the finished LED lamp beads, unable to meet the CIE standard, and insufficient luminous brightness. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide a dispensing head and a dispensing device to solve the problems of poor consistency of the landing points of the CIE color coordinates of LED lamp beads and insufficient luminous brightness.

[0004] To solve the above technical problem, the technical solution adopted by the present invention is:

[0005] A dispensing head includes: a rubber tube and a bracket connected to each other;

[0006] A plurality of shunt channels are arranged inside the rubber tube;

[0007] A sorting structure for screening some of the small-particle-size fluorescent powders into some of the shunt channels is arranged inside the bracket. The sorting structure is connected to the corresponding shunt channel and is arranged at the glue inlet of the corresponding shunt channel.

[0008] Furthermore, a shunt plate is arranged inside the rubber tube, and a first shunt channel and a second shunt channel are formed through the shunt plate. The sorting structure is arranged at the glue inlet of the first shunt channel.

[0009] Furthermore, the sorting structure includes: a partition wall and a filtering platform;

[0010] The filtering platform is respectively connected to the inner wall surface of the bracket and the top of the partition wall, and is located above the first shunt channel;

[0011] Both sides of the partition wall are connected to the inner wall surface of the bracket, and the bottom of the partition wall abuts against the top of the shunt plate.

[0012] Furthermore, the filtering platform is provided with a plurality of filtering through holes, and the plurality of filtering through holes are uniformly arranged on the filtering platform.

[0013] Further, the included angle between the filtering platform and the vertical plane where the partition wall is located is less than or equal to 30°.

[0014] Further, a notch penetrating the pipe wall is provided at the glue outlet of the rubber tube, and the notch divides the glue outlet into two symmetric parts.

[0015] Further, the notch is one of a V-shaped notch, a U-shaped notch, a square notch, and an arc-shaped notch.

[0016] Further, the rubber tube is detachably connected to the bracket.

[0017] Further, an external thread is provided at the glue inlet of the rubber tube, and an internal thread matching the external thread is provided at the glue outlet of the bracket, and the bracket is threadedly connected to the rubber tube.

[0018] A dispensing device includes a dispensing head as described in any one of the above, and further includes a frame, a positioning assembly for placing the product to be dispensed, and a moving assembly for moving the dispensing head above the positioning assembly;

[0019] The product positioning mechanism is fixedly connected to the frame, the moving assembly is movably connected to the frame, and the dispensing head is mounted on the moving assembly.

[0020] The beneficial effects of the present invention are as follows: By setting a sorting structure, part of the fluorescent powder with small particle size is screened into the corresponding shunt channels, and the glue is discharged separately through the corresponding shunt channels, while the other mixed fluorescent glue is discharged through other shunt channels. The landing positions of the fluorescent powder with different particle sizes can be effectively controlled respectively, which is beneficial to improving the consistency of the landing positions of the CIE color coordinates of the lamp beads and improving the brightness of the LED lamp beads at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the dispensing head according to an embodiment of the present invention;

[0022] Figure 2 It is another schematic structural diagram of the dispensing head according to an embodiment of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the bracket according to an embodiment of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the rubber tube according to an embodiment of the present invention.

[0025] Label description:

[0026] 100, Hose; 110, First shunt channel; 120, Second shunt channel; 130, Shunt plate; 140, First part; 150, Second part; 160, Notch; 170, External thread; 200, Bracket; 210, Partition wall; 220, Filter platform; 221, Filter through hole; 230, Internal thread. Detailed implementation

[0027] To describe the technical content, achieved objectives and effects of the present invention in detail, the following is described in conjunction with the implementation modes and with reference to the accompanying drawings.

[0028] Example 1

[0029] Please refer to Figures 1 to 4 , Example 1 of the present invention is as follows:

[0030] A dispensing head, installed on a dispensing device, and applied to dispense glue on LED lamp beads during the dispensing process.

[0031] The dispensing head includes: a hose 100 and a bracket 200 connected to each other; several shunt channels are provided inside the hose 100; a sorting structure for screening some small-particle-size phosphor powders into some of the shunt channels is provided inside the bracket 200, the sorting structure is connected to the corresponding shunt channels, and is arranged at the glue inlet of the corresponding shunt channels.

[0032] In this embodiment, the structural principle of the dispensing head is: the mixed phosphor glue enters the bracket 200, some small-particle-size phosphor powders are screened out through the sorting structure, and are dispensed through the corresponding shunt channels, while the other mixed phosphor glue is dispensed through the other shunt channels, so as to effectively separate the small-particle-size phosphor powders and the remaining mixed phosphor powders.

[0033] It can be understood that the concentrated dispensing of some small-particle-size phosphor powders can improve the landing consistency of the CIE color coordinates of the LED lamp beads, and the concentrated dispensing of the large-particle-size and the remaining small-particle-size phosphor powders can improve the brightness of the LED lamp beads, thereby improving the finished product quality of the LED lamp beads. Among them, in other embodiments, the sorting structure can perform multiple screenings. Exemplarily, first, the phosphor powders with a particle size equal to 20 μm and a particle size less than 20 μm are screened out from the mixed phosphor glue to obtain the first sorted phosphor glue, and then the phosphor powders with a particle size equal to 15 μm and a particle size less than 15 μm are screened out from the first sorted phosphor glue to obtain the second sorted phosphor glue. Therefore, the second sorted phosphor glue, the remaining first sorted phosphor glue, and the remaining mixed phosphor glue can be dispensed separately.

[0034] Specifically, a flow dividing plate 130 is disposed inside the rubber hose 100, and a first flow channel 110 and a second flow channel 120 are formed by the flow dividing plate 130. The sorting structure is disposed at the glue inlet of the first flow channel 110.

[0035] In this embodiment, at the glue outlet of the rubber hose 100, the cross-sectional areas of the first flow channel 110 and the second flow channel 120 are the same. In other embodiments, the cross-sectional area of the first flow channel 110 may be smaller than that of the second flow channel 120, and can be adjusted according to the required glue output after sorting.

[0036] Specifically, the sorting structure includes: a partition wall 210 and a filtering platform 220; the filtering platform 220 is respectively connected to the inner wall surface of the bracket 200 and the top of the partition wall 210, and is located above the first flow channel 110; both sides of the partition wall 210 are connected to the inner wall surface of the bracket 200, and the bottom of the partition wall 210 abuts against the top of the flow dividing plate 130. Further, the filtering platform 220 is provided with a plurality of filtering through holes 221, and the plurality of filtering through holes 221 are uniformly arranged on the filtering platform 220.

[0037] It can be understood that during the dispensing process, the mixed phosphor glue enters the bracket 200 and flows downward along the channel in the bracket 200. Part of the mixed phosphor glue falls on the filtering platform 220. Among them, the small-particle-size phosphor in this part of the mixed phosphor glue continues to flow after passing through the filtering through holes 221 and enters the first flow channel 110; while the large-particle-size phosphor that does not pass through the filtering through holes 221 converges with the rest of the mixed phosphor glue along the filtering platform 220, continues to flow, and is separated from the small-particle-size phosphor by the partition wall 210 and enters the second flow channel 120, thereby realizing the separate glue output of part of the small-particle-size phosphor. When dispensing for each LED chip, the landing positions of part of the small-particle-size phosphor remain unchanged, so as to keep the CIE color coordinates consistent. The filtering platform 220 may also be a filter screen in other embodiments.

[0038] In other embodiments, if the sorting structure performs sorting multiple times, for example, the sorting structure includes a first filtering platform, a first partition wall, a second filtering platform, and a second partition wall. The first filtering platform, the second partition wall, and the inner wall of the bracket form a first cavity. The second filtering platform and the second filtering platform are disposed in the second cavity. The second filtering platform is connected to the inner wall surface of the bracket, the top of the second partition wall, and one side surface of the first partition wall. The second partition wall is connected to the inner wall surface of the bracket and one side surface of the first partition wall. The second filtering platform and the second partition wall form a second cavity in the first cavity. The first shunt channel is further divided into a first sub-shunt channel and a second sub-shunt channel, wherein the first sub-shunt channel communicates with the second cavity.

[0039] It can be understood that during the first sorting, part of the mixed fluorescent glue falls on the first filtering platform. After sorting, the phosphor powder that does not enter the first cavity and the remaining fluorescent glue fall on the other side of the first partition wall and enter the second shunt channel. During the second sorting, part of the phosphor powder that enters the first cavity falls on the second filtering platform. In the first cavity after sorting, the phosphor powder that does not enter the second cavity and the remaining phosphor powder fall on the other side of the second partition wall and enter the second sub-shunt channel, and the phosphor powder that enters the first cavity enters the first sub-shunt channel.

[0040] Further, the included angle between the vertical plane where the filtering platform 220 and the partition wall 210 are located is at most 30°. It can be understood that during the dispensing process, when part of the mixed fluorescent glue falls on the filtering platform 220, due to the included angle between the vertical plane where the filtering platform 220 and the partition wall 210 are located, the large-particle-size phosphor powder that fails to pass through the filtering through-holes 221 or the mesh slides along the inclined surface of the filtering platform 220 to the other side of the partition wall 210 and enters the second shunt channel 120, thereby preventing the filtering through-holes 221 or the mesh from being blocked.

[0041] Specifically, the rubber tube 100 is detachably connected to the bracket 200. It can be understood that the detachable connection between the rubber tube 100 and the bracket 200 is beneficial to cleaning the residual glue inside the rubber tube 100 and the bracket 200, and avoiding low glue discharging efficiency and blockage of the filtering platform 220.

[0042] In this embodiment, an external thread 170 is provided at the glue inlet of the rubber tube 100, and an internal thread 230 that mates with the external thread 170 is provided at the glue outlet of the bracket 200. The bracket 200 is threadedly connected to the rubber tube 100. With this arrangement, the bracket 200 and the rubber tube 100 are tightly connected and are easy to install and disassemble. Further, a seal may be provided at the connection between the rubber tube 100 and the bracket 200 to improve the overall sealing performance. In other embodiments, the rubber tube 100 and the bracket 200 may also be connected by other detachable connection means such as snap fasteners.

[0043] Embodiment Two

[0044] The existing glue outlet of the dispensing head uses a flat circular glue outlet hole, which easily causes phenomena such as glue pulling and glue flowing during the dispensing process. In addition, the number of different aperture sizes of the glue outlet hole is too large, resulting in frequent replacement during normal processes, seriously affecting production efficiency.

[0045] In this embodiment, a dispensing head is provided, including: a rubber tube 100 and a bracket 200 connected to each other; a plurality of flow channels are provided inside the rubber tube 100; a sorting structure for screening a part of the fluorescent powder with small particle size into a part of the flow channels is provided inside the bracket 200. The sorting structure is connected to the corresponding flow channel and is provided at the glue inlet of the corresponding flow channel. Further, a notch 160 penetrating the tube wall is provided at the glue outlet of the rubber tube 100, and the notch 160 divides the glue outlet into a symmetric first part 140 and a second part 150.

[0046] It can be understood that the notch 160 penetrating the tube wall at the glue outlet divides the glue outlet into the symmetric first part 140 and the second part 150, forming a bifurcated structure, so that when the fluorescent glue is dispensed, it is avoided to adhere to the glue outlet, thereby avoiding phenomena such as glue carrying and glue pulling, which is beneficial to keeping the glue amount of the LED lamp beads consistent after dispensing and improving the yield of the LED lamp beads; in addition, it avoids frequent replacement of the dispensing head during the production process, which is beneficial to improving production efficiency. In this embodiment, the flow dividing plate 130 is located on the symmetric plane of the first part 140 and the second part 150, and the flow dividing plate 130 plays a role in improving the strength of the rubber tube 100 while forming the first flow channel 110 and the second flow channel 120. In other embodiments, the flow dividing plate 130 may also be located on an offset plane of the symmetric plane.

[0047] Specifically, the notch 160 is one of a V-shaped notch 160, a U-shaped notch 160, a square notch 160, and a circular arc notch 160. In this embodiment, the notch 160 is a circular arc notch 160.

[0048] Furthermore, the interior of the rubber tube 100 includes a connected cylindrical section and a conical section. The cylindrical section is located at the glue inlet of the rubber tube 100, and the conical section is located at the glue outlet of the dispensing port. The cross-sectional area where the conical section is connected to the cylindrical section is smaller than the cross-sectional area of the conical section at the glue outlet. It can be understood that the closer the rubber tube 100 is to the glue outlet, the more gradually the internal channel narrows, which is beneficial to controlling the glue output volume.

[0049] Embodiment 3

[0050] This embodiment discloses a dispensing device, which includes a dispensing head as described in any one of the above embodiments, and further includes a frame, a positioning component for placing the product to be dispensed, and a moving component for moving the dispensing head above the positioning component; the product positioning mechanism is fixedly connected to the frame, the moving component is movably connected to the frame, and the dispensing head is installed on the moving component.

[0051] In this embodiment, during the dispensing process, the LED workpiece to be dispensed is placed on the positioning component, and the dispensing head is moved to the corresponding LED workpiece to be dispensed through the moving component, so as to perform dispensing.

[0052] In summary, the dispensing head and the dispensing device provided by the present invention, when the mixed fluorescent glue enters the bracket, part of the small-particle-size fluorescent powder is screened out by the sorting structure and dispensed through the corresponding shunt channels, while the other mixed fluorescent glue is dispensed through other shunt channels, so as to effectively separate the small-particle-size fluorescent powder and the remaining mixed fluorescent powder. The concentrated dispensing of part of the small-particle-size fluorescent powder can improve the landing consistency of the CIE color coordinates of the LED lamp beads, and the concentrated dispensing of the large-particle-size and the remaining small-particle-size fluorescent powder can improve the brightness of the LED lamp beads, thereby improving the finished product quality of the LED lamp beads.

[0053] In addition, a notch penetrating the tube wall is provided at the glue outlet, and the glue outlet is separated into two symmetrical parts, forming a bifurcated structure, so that when the fluorescent glue is dispensed, it is prevented from adhering to the glue outlet, thereby avoiding phenomena such as glue carrying and glue pulling, which is beneficial to keeping the glue volume of the LED lamp beads consistent after dispensing and improving the yield of the LED lamp beads; in addition, it avoids frequent replacement of the dispensing head during the production process, which is beneficial to improving production efficiency.

[0054] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in the related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A dispensing head, characterized in that, Comprising: A rubber tube and a bracket connected to each other; A number of flow channels are provided inside the rubber tube; a notch penetrating the tube wall is provided at the glue outlet of the rubber tube, and the notch divides the glue outlet into two symmetrical parts; A sorting structure for screening some small-particle-size fluorescent powders into some of the flow channels is provided inside the bracket. The sorting structure is connected to the corresponding flow channel and is arranged at the glue inlet of the corresponding flow channel; a flow dividing plate is provided inside the rubber tube, and a first flow channel and a second flow channel are formed through the flow dividing plate. The sorting structure is arranged at the glue inlet of the first flow channel; The sorting structure includes: a partition wall and a filtering platform; The filtering platform is respectively connected to the inner wall surface of the bracket and the top of the partition wall and is located above the first flow channel; a number of filtering through holes are provided on the filtering platform, and the number of filtering through holes are evenly arranged on the filtering platform; Both sides of the partition wall are connected to the inner wall surface of the bracket, and the bottom of the partition wall abuts against the top of the flow dividing plate.

2. The dispensing head according to claim 1, wherein The included angle between the filtering platform and the vertical plane where the partition wall is located is less than or equal to 30°.

3. The dispensing head according to claim 1, wherein The notch is one of a V-shaped notch, a U-shaped notch, a square notch, and an arc-shaped notch.

4. The dispensing head according to claim 1, wherein, The rubber tube and the bracket are detachably connected.

5. The dispensing head according to claim 4, wherein, An external thread is provided at the glue inlet of the rubber tube, and an internal thread matching the external thread is provided at the glue outlet of the bracket. The bracket is threadedly connected to the rubber tube.

6. A dispensing device, characterized in that, Comprising the dispensing head according to any one of claims 1-5, further comprising a frame, a positioning component for placing the product to be dispensed, and a moving component for moving the dispensing head above the positioning component; The positioning component is fixedly connected to the frame, the moving component is movably connected to the frame, and the dispensing head is mounted on the moving component.

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