Micro-concave coating roller and coating equipment

Abstract

The utility model discloses a micro-concave coating roller and coating equipment. The micro-concave coating roller comprises a coating roller assembly and a micro-concave coating sleeve position adjusting mechanism. The coating roller assembly comprises a core roller, the core roller is sleeved with at least one micro-concave coating sleeve in a sliding mode along the axis of the core roller, and micro-concave lines are arranged on the peripheral face of the micro-concave coating sleeve. The micro-gravure coating sleeve position adjusting mechanism is matched with the micro-gravure coating sleeve, so that the micro-gravure coating sleeve moves to a preset position along the axis direction of the core roller and is locked at the preset position. The axial telescopic mechanism enables the micro-concave coating sleeve to move to the preset position, the stopping mechanism enables the micro-concave coating sleeve to be kept at the preset position, in this way, the position of the micro-concave coating sleeve can be adjusted according to needs, the adjusting mode is simple and convenient, replacement of different coating devices is avoided, and therefore the production cost is reduced.

Description

Technical Field

[0001] The utility model generally relates to the technical field of lithium batteries, and in particular to a micro-concave coating roller and a coating device. Background Art

[0002] When coating the electrode, continuous coating in the longitudinal direction is often required, and when switching between different products or encountering other situations, the axis position of the micro-concave coating roller needs to be adjusted.

[0003] In the related art, the axis position of the concave coating roller is set to a preset position by replacing different coating equipment. However, this method increases production costs. Utility Model Content

[0004] The present application hopes to provide a micro-concave coating roller and a coating device, at least for reducing production costs.

[0005] The utility model provides a micro-concave coating roller, comprising a coating roller component and a micro-concave coating sleeve position adjustment mechanism.

[0006] The coating roller assembly includes a core roller, on which at least one micro-concave coating sleeve is slidably sleeved along its axis, and the outer peripheral surface of the micro-concave coating sleeve is provided with micro-concave patterns;

[0007] The micro-dimpled coating sleeve position adjustment mechanism cooperates with the micro-dimpled coating sleeve, so that the micro-dimpled coating sleeve moves to a preset position along the axis direction of the core roller and is locked at the preset position.

[0008] As an implementable manner, a smooth sleeve is slidably mounted on the core roller, and the smooth sleeves are respectively provided at both ends of the micro-concave coating sleeve, and the outer circumference of the smooth sleeve is coaxially arranged with the outer circumference of the micro-concave coating sleeve.

[0009] As an implementable manner, the opposite ends of the micro-dimpled coating sleeve and the optical sleeve are connected via a first conical hole and a first conical protrusion that are plugged into and fitted with each other.

[0010] As an implementable manner, the micro-concave coating sleeve position adjustment mechanism includes an axial telescopic mechanism provided at one end of the core roller and a resisting mechanism provided at the other end of the core roller.

[0011] As an implementable manner, the axial telescopic mechanism includes a first support member, a second support member that is dynamically sealed and rotatably matched with the first support member, and a cavity is formed between the first support member and the second support member.

[0012] The first support member is fixedly connected to the core roller; the first support member is provided with a first through hole communicating with the cavity,

[0013] The core roller is sheathed with a first bellows and a second bellows, the first bellows is sheathed outside the second bellows, one end of the first bellows and the second bellows are respectively sealed and fixed to the second support member, and the other end of the first bellows and the second bellows are respectively sealed and fixed to the slider, and the slider cooperates with the core roller.

[0014] The second support member is provided with a second through hole, which communicates with the cavity and the space between the first bellows and the second bellows; the sliding block is connected to the opposite end of the micro-dimpled coating sleeve.

[0015] As an implementation method, the first support member includes a first flange, and the first flange is coaxially arranged with the core roller;

[0016] The second support member includes a second flange, and the second flange is coaxially arranged with the core roller;

[0017] A first support sleeve is provided between the opposing surfaces of the first flange and the second flange, one end of the first support sleeve is fixedly connected to one of the first flange and the second flange, and is sealed with the other of the first flange and the second flange through a first seal; a second support sleeve is provided outside the first support sleeve, the second support sleeve is fixedly connected to one of the first flange and the second flange, and is sealed with the other of the first flange and the second flange through a second seal.

[0018] As an achievable manner, one of the first flange and the second flange is provided with a sealing groove on its outer periphery, and the other is fixedly connected to the second support sleeve, and the end of the second support sleeve is provided with a flange, which is arranged in the sealing groove, and the second sealing member is provided between any opposite surfaces of the flange and the sealing groove.

[0019] As an implementable manner, the coating roller assembly further includes a core shaft passing through the core roller.

[0020] The resisting mechanism includes a resisting member screwed to the core shaft, and the resisting member and the opposite end of the micro-concave coating sleeve are connected through a second conical hole and a second conical protrusion that fit together; a locking nut is provided on the side of the resisting member facing away from the micro-concave coating sleeve, and the locking nut is screwed to the core shaft.

[0021] As an implementable manner, there is a gap between the core roller and the micro-dimpled coating sleeve.

[0022] The utility model also provides a coating device, comprising the above-mentioned micro-concave coating roller.

[0023] In the above scheme, the axial telescopic mechanism of the present application enables the micro-concave coating sleeve to move to a preset position, and the resisting mechanism enables the micro-concave coating sleeve to remain at the preset position, so that the micro-concave coating sleeve can adjust its position as needed, and the adjustment method is simple and convenient, avoiding the need to replace different coating equipment, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0025] Figure 1 A schematic structural diagram of a first type of micro-concave coating roller provided in an embodiment of the present utility model;

[0026] Figure 2 A schematic diagram of the left side partial structure of the first micro-concave coating roller provided in an embodiment of the present utility model;

[0027] Figure 3 yes Figure 2 A magnified schematic diagram of a local area A;

[0028] Figure 4 yes Figure 2 An enlarged schematic diagram of a local B;

[0029] Figure 5 A schematic diagram of the right side partial structure of the first micro-concave coating roller provided in an embodiment of the present utility model;

[0030] Figure 6 A schematic structural diagram of a second concave coating roller provided in an embodiment of the present utility model;

[0031] Coating roller assembly 10, core roller 11, micro-concave coating sleeve 12, first conical hole 121, second conical hole 122, smooth sleeve 13, first smooth sleeve 13a, second smooth sleeve 13b, first conical protrusion 131, second conical protrusion 132, core shaft 14;

[0032] Axial telescopic mechanism 20, first flange 21, first through hole 211, second flange 22, first threaded mating portion 221, second threaded mating portion 222, second through hole 223, first sealing groove 224, second sealing groove 225, first bellows 23, first threaded portion 231, third threaded portion 232, second bellows 24, second threaded portion 241, fourth threaded portion 242, third flange 25, third threaded mating portion 251, fourth threaded mating portion 252, first support sleeve 26, second support sleeve 27, flange 271;

[0033] Retaining mechanism 30, retaining member 31, locking nut 32;

[0034] A first sealing member 41 and a second sealing member 42 . DETAILED DESCRIPTION

[0035] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant utility model and are not intended to limit the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0036] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] At least see Figures 1-6 As shown, the example of the present invention provides a micro-concave coating roller, including: a coating roller assembly 10 and a micro-concave coating sleeve position adjustment mechanism.

[0038] The coating roller assembly 10 includes a core roller 11 and a micro-concave coating sleeve 12. At least one micro-concave coating sleeve 12 is slidably sleeved on the core roller 11 along its axis, and the outer peripheral surface of the micro-concave coating sleeve 12 is provided with micro-concave lines.

[0039] like Figure 1 、 2 As shown in Figures 5 and 6, in a specific embodiment, the coating roller assembly 10 includes a concave coating sleeve 12, which is mounted on a core roller 11. The concave coating sleeve 12 is coaxially arranged with the core roller 11. The inner diameter of the concave coating sleeve 12 can be equal to the diameter of the core roller 11, that is, there is no gap between the concave coating sleeve 12 and the core roller 11, and the gap between the concave coating sleeve 12 and the core roller 11 is matched so that the concave coating sleeve 12 can reciprocate relative to the core roller 11 in the left and right directions; or, the inner diameter of the concave coating sleeve 12 can be greater than or equal to the diameter of the core roller 11, that is, there is a small gap between the concave coating sleeve 12 and the core roller 11, which can reduce the friction between the concave coating sleeve 12 and the core roller 11, and help the concave coating sleeve 12 reciprocate relative to the core roller 11 in the left and right directions.

[0040] It should be noted that the following embodiments are described with a small gap between the micro-concave coating sleeve 12 and the core roller 11:

[0041] In addition, if Figure 1 As shown, the coating roller assembly 10 further includes a smooth sleeve 13, which is provided at the left and right ends of the micro-dimpled coating sleeve 12. The smooth sleeve 13 is sleeved on the core roller 11 and is coaxially arranged with the core roller 11. The smooth sleeves 13 on the left and right sides are positioned and matched with the micro-dimpled coating sleeve 12 so that the outer circumference of the smooth sleeve 13 is coaxially arranged with the outer circumference of the micro-dimpled coating sleeve 12.

[0042] In a specific embodiment, Figure 2 、 5 As shown, the optical sleeve 13 on the left is a first optical sleeve 13 a , and the optical sleeve 13 on the right is a second optical sleeve 13 b .

[0043] like Figure 2 As shown, the end of the first polishing sleeve 13a facing the micro-dimpled coating sleeve 12 is a first conical protrusion 131, and the end of the micro-dimpled coating sleeve 12 facing the first polishing sleeve 13a is a first conical hole 121. The first conical hole 121 and the first conical protrusion 131 are inserted into each other to achieve the connection between the first polishing sleeve 13a and the left end of the micro-dimpled coating sleeve 12.

[0044] Since the surface of the first conical hole 121 is a conical surface, the surface of the first conical protrusion 131 is also a conical surface, so the first conical hole 121 and the first conical protrusion 131 guide each other, so that the outer circumference of the first polishing sleeve 13a is coaxially arranged with the outer circumference of the micro-concave coating sleeve 12.

[0045] like Figure 5 As shown, the end of the second optical sleeve 13b facing the micro-dimpled coating sleeve 12 is a second conical protrusion 132, and the end of the micro-dimpled coating sleeve 12 facing the second optical sleeve 13b is a second conical hole 122. The second conical hole 122 and the second conical protrusion 132 are inserted into each other to achieve the connection between the second optical sleeve 13b and the right end of the micro-dimpled coating sleeve 12.

[0046] Since the surface of the second conical hole 122 is a conical surface, the surface of the second conical protrusion 132 is also a conical surface, so the second conical hole 122 and the second conical protrusion 132 guide each other, so that the outer circumference of the second optical sleeve 13b is coaxially arranged with the outer circumference of the micro-concave coating sleeve 12.

[0047] Of course, it is understandable that Figure 6 As shown, a groove is provided at one end of the first optical sleeve 13a facing the dimple coating sleeve 12, and a protrusion is provided at one end of the dimple coating sleeve 12 facing the first optical sleeve 13a, and the protrusion and the groove are inserted into each other; similarly, a groove is provided at one end of the second optical sleeve 13b facing the dimple coating sleeve 12, and a protrusion is provided at one end of the dimple coating sleeve 12 facing the second optical sleeve 13b, and the protrusion and the groove are inserted into each other.

[0048] The micro-dimpled coating sleeve position adjustment mechanism cooperates with the micro-dimpled coating sleeve 12 so that the micro-dimpled coating sleeve 12 moves to a preset position along the axis direction of the core roller 11 and is locked at the preset position.

[0049] In detail, the micro-dimpled coating sleeve position adjustment mechanism includes an axial telescopic mechanism 20 provided at one end of the core roller 11 and a resisting mechanism 30 provided at the other end of the core roller 11 .

[0050] like Figure 1As shown, the axial telescopic mechanism 20 is arranged on the left side of the core roller 11, and the axial telescopic mechanism 20 is connected to the first smooth sleeve 13a, so that the first smooth sleeve 13a reciprocates in the left and right directions, and then the micro-concave coating sleeve 12 reciprocates in the left and right directions relative to the core roller 11, so that the micro-concave coating sleeve 12 can move to a preset position.

[0051] The resisting mechanism 30 is arranged on the right side of the core roller 11 and is connected to the second polishing sleeve 13b. The resisting mechanism 30 makes the second polishing sleeve 13b abut against the dimple coating sleeve 12 in the preset position to limit the rightward movement of the dimple coating sleeve 12.

[0052] The axial telescopic mechanism 20 enables the micro-concave coating sleeve 12 to move to a preset position, and the resisting mechanism 30 enables the micro-concave coating sleeve 12 to remain at the preset position. In this way, the micro-concave coating sleeve 12 can adjust its position as needed. The adjustment method is simple and convenient, avoiding the need to replace different coating equipment, thereby reducing production costs.

[0053] like Figure 2-4 As shown, the axial telescopic mechanism 20 includes a first support member, a second support member, a first bellows 23, a second bellows 24, and a third support member. The first support member, the second support member, and the third support member have substantially the same structure. The first support member, the second support member, and the third support member can be, but are not limited to, flange structures.

[0054] The diameter of the first bellows 23 is greater than that of the second bellows 24. The first and second bellows 23, 24 are made of the same material. They can be, but are not limited to, metal or non-metallic bellows. The non-metallic bellows can be plastic, such as polypropylene, polyethylene, or polytetrafluoroethylene. The bellows' expansion and contraction in the left-right direction allows the dimple coating sleeve 12 to move to a predetermined position.

[0055] The first flange 21, the second flange 22, and the third flange 25 are spaced apart from each other from left to right, and are coaxially arranged. The left end of the core roller 11 passes through the third flange 25 and is connected to the second flange 22, and the third flange 25 is connected to the first smooth sleeve 13a.

[0056] The first bellows 23 and the second bellows 24 are coaxially arranged, with the second bellows 24 located within the first bellows 23. The first bellows 23 and the second bellows 24 are located between the second flange 22 and the third flange 25. The left ends of the first bellows 23 and the second bellows 24 are sealed to the third flange 25, and the right ends are sealed to the second flange 22.

[0057] Specifically, if Figure 3 、 4As shown, a first threaded portion 231 is provided at the left end of the first bellows 23 , and a third threaded portion 232 is provided at the right end; a second threaded portion 241 is provided at the left end of the second bellows 24 , and a fourth threaded portion 242 is provided at the right end.

[0058] An annular third threaded fitting portion 251 and a fourth threaded fitting portion 252 are provided on the right surface of the third flange 25. The third threaded fitting portion 251 is threadedly connected to the third threaded portion 232, and a sealing tape is provided between the two; the fourth threaded fitting portion 252 is threadedly connected to the fourth threaded portion 242, and a sealing tape is provided between the two.

[0059] An annular first threaded fitting portion 221 and a second threaded fitting portion 222 are provided on the left surface of the second flange 22. The first threaded fitting portion 221 is threadedly connected to the first threaded portion 231, and a sealing tape is provided between the two; the second threaded fitting portion 222 is threadedly connected to the second threaded portion 241, and a sealing tape is provided between the two.

[0060] In this way, the air pressure in the space between the first bellows 23 and the second bellows 24 is increased, that is, air is introduced, so that the length of the first bellows 23 and the second bellows 24 in the left-right direction is increased; or the air pressure in the space between the first bellows 23 and the second bellows 24 is reduced, that is, air is extracted therefrom, so that the length of the first bellows 23 and the second bellows 24 in the left-right direction is shortened. The third flange 25 can also be understood as a slider. The third flange 25 reciprocates in the left-right direction, and the first smooth sleeve 13a reciprocates in the left-right direction to achieve the movement of the micro-dimpled coating sleeve 12 to the preset position.

[0061] The left ends of the first bellows 23 and the second bellows 24 are sealed to the third flange 25, and the right ends are sealed to the second flange 22, so that the sealing performance of the space between the first bellows 23 and the second bellows 24 is good, which helps to accurately control the expansion and contraction of the first bellows 23 and the second bellows 24 in the left and right directions.

[0062] A cavity is formed between the first flange 21 and the second flange 22 , and the cavity is connected to the space between the first bellows 23 and the second bellows 24 . The air pressure in the cavity is changed, thereby changing the air pressure in the above space.

[0063] Specifically, if Figure 2 As shown, the axial telescopic mechanism 20 further includes a first support sleeve 26 and a second support sleeve 27 .

[0064] The first support sleeve 26 and the second support sleeve 27 can be made of, but not limited to, carbon steel or stainless steel. The first support sleeve 26 and the second support sleeve 27 are annular members.

[0065] The first support sleeve 26 is coaxially positioned within the second support sleeve 27. The first support sleeve 26 is positioned between the first flange 21 and the second flange 22. One end of the first support sleeve 26 can be welded to the right surface of the first flange 21. An annular first sealing groove 224 is provided on the left surface of the second flange 22. The other end of the first support sleeve 26 is positioned within the first sealing groove 224, with a first seal 41 positioned between the first and second flanges.

[0066] The second support sleeve 27 is located outside the first flange 21 and the second flange 22, surrounding the first and second flanges 21 and 22. One end of the second support sleeve 27 can be welded to the side of the first flange 21. A second annular sealing groove 225 is provided on the side of the second flange 22. The other end of the second support sleeve 27 is provided with a flange 271 extending along its circumference. The flange 271 is positioned within the second sealing groove 225, with a second sealing member 42 positioned between the flange 271 and the second sealing member 42.

[0067] In this way, the first support sleeve 26, the second support sleeve 27, the first flange 21 and the second flange 22 form a cavity with good sealing performance, which helps to change the air pressure in the above space by changing the air pressure in the cavity.

[0068] like Figure 2 As shown, a plurality of second through holes 223 are provided on the second flange 22 , and the plurality of second through holes 223 are arranged in an annular shape. The second through holes 223 connect the cavity with the space between the first bellows 23 and the second bellows 24 .

[0069] A first through hole 211 is provided on the first flange 21. The first through hole 211 is connected to the cavity. Gas can be injected into the cavity through the first through hole 211 to increase the pressure of the cavity, or the gas in the cavity can be extracted to reduce the pressure of the cavity.

[0070] Among them, Figure 5 As shown, the resisting mechanism 30 includes a resisting member 31 and a locking nut 32. The resisting member 31 is connected to the second smooth sleeve 13b, and the resisting member 31 is connected to the right end of the core roller 11.

[0071] The coating roller assembly 10 also includes a core shaft 14 that passes through the core roller 11, and a retaining member 31 is threadedly connected to the core shaft 14. When the dimple coating sleeve 12 moves along the axis of the core roller 11 to a predetermined position, the retaining member 31 is rotated to adjust its position in the left-right direction so that the second smooth sleeve 13b abuts the right end of the dimple coating sleeve 12. This limits the rightward movement of the dimple coating sleeve 12.

[0072] In addition, the locking nut 32 is threadedly engaged with the core shaft 14 , and the locking nut 32 abuts against the stopper 31 , further improving the stability of limiting the movement of the micro-dimpled coating sleeve 12 .

[0073] The present utility model also provides a coating device, including the above-mentioned micro-concave coating roller.

[0074] The coating equipment has the advantages of a micro-concave coating roller, so it will not be described in detail.

[0075] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0076] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the utility model disclosed herein is not limited to the technical solutions formed by a specific combination of the aforementioned technical features, but also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents without departing from the concept of the utility model. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A micro-concave coating roller, characterized in that: include: A coating roller assembly (10), the coating roller assembly (10) comprising a core roller (11), at least one micro-concave coating sleeve (12) being slidably sleeved on the core roller (11) along its axis, the outer peripheral surface of the micro-concave coating sleeve (12) being provided with micro-concave patterns; A micro-concave coating sleeve position adjustment mechanism cooperates with the micro-concave coating sleeve (12) so that the micro-concave coating sleeve (12) moves along the axis of the core roller (11) to a preset position and is locked at the preset position.

2. The micro-dimpled coating roller according to claim 1, characterized in that: A smooth sleeve (13) is also slidably mounted on the core roller (11), and the smooth sleeves (13) are respectively provided at both ends of the micro-concave coating sleeve (12), and the outer peripheral surface of the smooth sleeve (13) is coaxially arranged with the outer peripheral surface of the micro-concave coating sleeve (12).

3. The micro-dimpled coating roller according to claim 2, characterized in that: The opposite ends of the micro-concave coating sleeve (12) and the optical sleeve (13) are connected via a first conical hole and a first conical protrusion that are fitted into each other.

4. The micro-concave coating roller according to any one of claims 1 to 3, characterized in that: The micro-concave coating sleeve position adjustment mechanism comprises an axial telescopic mechanism (20) provided at one end of the core roller (11) and a resisting mechanism (30) provided at the other end of the core roller (11).

5. The micro-dimpled coating roller according to claim 4, characterized in that: The axial telescopic mechanism (20) comprises a first support member and a second support member that is dynamically sealed and rotatably matched with the first support member, wherein a cavity is formed between the first support member and the second support member. The first support member is fixedly connected to the core roller (11); the first support member is provided with a first through hole (211) communicating with the cavity. The core roller (11) is sheathed with a first bellows (23) and a second bellows (24), the first bellows (23) is sheathed outside the second bellows (24), one end of the first bellows (23) and the second bellows (24) are respectively sealed and fixed to the second support member, and the other ends of the first bellows (23) and the second bellows (24) are respectively sealed and fixed to a slider, and the slider cooperates with the core roller (11). The second support member is provided with a second through hole (223), the second through hole (223) communicating with the cavity and the space between the first bellows (23) and the second bellows (24); the slider is connected to the opposite end of the micro-concave coating sleeve (12).

6. The micro-dimpled coating roller according to claim 5, characterized in that: The first support member comprises a first flange (21), and the first flange (21) is coaxially arranged with the core roller (11); The second support member comprises a second flange (22), and the second flange (22) is coaxially arranged with the core roller (11); A first support sleeve (26) is provided between the opposing surfaces of the first flange (21) and the second flange (22), one end of the first support sleeve (26) is fixedly connected to one of the first flange (21) and the second flange (22), and is sealed with the other end of the first flange (21) and the second flange (22) through a first sealing member (41); a second support sleeve (27) is provided outside the first support sleeve (26), the second support sleeve (27) is fixedly connected to one of the first flange (21) and the second flange (22), and is sealed with the other end of the first flange (21) and the second flange (22) through a second sealing member (42).

7. The micro-dimpled coating roller according to claim 6, characterized in that: One of the first flange (21) and the second flange (22) is provided with a sealing groove on its outer periphery, and the other is fixedly connected to the second support sleeve (27), and the end of the second support sleeve (27) is provided with a flange (271), and the flange (271) is arranged in the sealing groove, and the second sealing member (42) is provided between any opposite surfaces of the flange (271) and the sealing groove.

8. The micro-dimpled coating roller according to claim 6, characterized in that: The coating roller assembly (10) further includes a core shaft (14) passing through the core roller (11), The resisting mechanism (30) comprises a resisting member (31) screwed to the core shaft (14), wherein the resisting member (31) and the opposite end of the micro-concave coating sleeve (12) are connected via a second conical hole and a second conical protrusion that are mutually plugged and matched; a locking nut (32) is provided on the side of the resisting member (31) facing away from the micro-concave coating sleeve (12), and the locking nut (32) is screwed to the core shaft (14).

9. The micro-dimpled coating roller according to claim 1, characterized in that: There is a gap between the core roller (11) and the micro-concave coating sleeve (12).

10. A coating device, characterized in that: The invention comprises the micro-concave coating roller according to any one of claims 1 to 9.

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