Roller body static electricity eliminating device for vacuum coating

Abstract

The utility model relates to the technical field of composite current collectors, in particular to a roller static elimination device for vacuum coating, which comprises a carbon brush and a grounding terminal, the carbon brush is detachably mounted on a fixing frame and comprises a brush frame and bristles, the back of the fixing frame is connected with a positioning main body through a first spring, and the positioning main body is fixedly mounted on a vacuum coating device. No less than two groups of longitudinal grooves are formed in one side surface close to the fixing frame; the fixing frame comprises a clamping frame at one end and a connecting frame at the other end, the back faces of the clamping frame and the connecting frame are connected through a U-shaped support, the first springs are evenly distributed on the back face of the U-shaped support, limiting grooves are formed in the two sides of the clamping frame, and protrusions clamped with the limiting grooves are arranged on the two side faces of one end of the brush frame. A groove matched with the end of the brush holder is formed in the side, facing the clamping frame, of the connecting frame. According to the static electricity eliminating device, the carbon brush is additionally arranged on the edge supporting frame of the roller body for vacuum coating, so that the function of guiding out residual static electricity is achieved, and the phenomena of holes, pinholes and the like caused by ignition due to static electricity accumulation are avoided.

Description

Technical Field

[0001] This application relates to the field of composite current collector technology, and in particular to a roller electrostatic elimination device for vacuum coating. Background Technology

[0002] During the production of composite current collectors, the base film and the passive roller rub against each other during the magnetocontrol process, resulting in a large amount of static electricity on the base film. Because the static electricity cannot be completely released, it causes arcing, which leads to phenomena such as coating holes and pinholes. However, there is no good way to discharge the residual static electricity in the current method.

[0003] Chinese patent CN202269080U discloses a carbon brush device for removing static electricity from a corona roller. The device includes a brush holder, which is L-shaped and consists of a fixed plate and a mounting plate. The ends of the fixed plate are perpendicularly connected to each other and integrally formed. A clamping adjustment mechanism is also provided on the fixed plate. A square hole is provided on the mounting plate, and the carbon brush is placed in the hole with its front end facing the end of the corona roller. The rear end of the carbon brush is the clamping adjustment mechanism. This invention effectively prevents the carbon brush and brush holder from being damaged by the rotating corona roller body, effectively removes static electricity, protects the corona roller body and its bearings from damage, has a simple structure, is durable, and is easy to replace.

[0004] The static elimination structure in existing patents requires timely adjustment of the carbon brush position, and when the carbon brush wears down to the root, the bolts need to be removed to replace the new carbon brush. Replacing the bolts not only requires tools, but also takes a long time. Utility Model Content

[0005] In order to overcome the problems existing in the prior art, this application provides a static electricity elimination device for a roller body used in vacuum coating.

[0006] The electrostatic elimination device for a vacuum coating roller provided in this application adopts the following technical solution:

[0007] A static eliminator for a vacuum coating roller includes a carbon brush and a grounding terminal fixed to the back of the carbon brush. The carbon brush is detachably mounted on a fixed frame and includes a brush holder and brush bristles at the bottom of the brush holder. The back of the fixed frame is connected to a positioning body via a first spring. The positioning body is fixedly mounted on a support frame on the side of the roller and has at least two sets of longitudinal grooves on one side near the fixed frame that can accommodate the first spring. The fixed frame includes a snap-fit ​​frame at one end and a connecting frame at the other end, with their backs connected by a U-shaped bracket. The first spring is evenly distributed on the back of the U-shaped bracket. The snap-fit ​​frame has limiting grooves on both sides for snapping the brush holder. The brush holder has protrusions on both sides of one end that snap into the limiting grooves. The connecting frame has a groove on the side facing the snap-fit ​​frame that matches the end of the brush holder.

[0008] By adopting the above technical solution, the carbon brush in the static elimination device acts on the edge of the roller used to transfer the base film during the composite current collector production process, and conducts static electricity to the ground through a grounding terminal connected to a wire. The carbon brush, with bristles installed at the bottom of the brush holder, acts on the roller at the connection point between the roller edge and the support frame. The carbon brush is detachably mounted on a fixed frame. The fixed frame engages with protrusions on both sides of one end of the brush holder via limiting grooves on both sides of the snap-fit ​​frame. The other end of the brush engages with a groove in the connecting frame as the protrusion enters the limiting groove, thus fixing the carbon brush in the fixed frame. The brush bristles can be quickly replaced when worn to the root. The snap-fit ​​frames at both ends of the fixed frame and the top of the connecting frame are connected by a U-shaped frame. The space at the bottom of the U-shaped frame facilitates the replacement of the spring-loaded brush. The top of the U-shaped frame is connected to the positioning body via a first spring. Under the action of the first spring, the U-shaped frame applies pressure to the roller surface, ensuring stable static electricity discharge and preventing arcing caused by static electricity accumulation. It also effectively prevents holes and pinholes caused by static arcing.

[0009] Preferably, the snap-fit ​​frame is further equipped with an elastic limiting mechanism for locking the brush holder in the limiting groove, including a sliding plate slidably installed in the snap-fit ​​frame. The back of the sliding plate is connected to the end of the snap-fit ​​frame via a second spring, and a limiting rod penetrating the end of the connecting frame is installed on the back of the sliding plate. The limiting rod is located at the center of the second spring, and a limiting plate is also installed at the outer end of the connecting frame where the limiting rod is located.

[0010] Preferably, the outer surface of the sliding plate is inclined upward, and the two sides of the sliding plate move within the grooves on both sides of the snap-fit ​​frame via sliders.

[0011] By adopting the above technical solution, when the brush holder is installed, the elastic limiting mechanism installed in the snap-fit ​​frame causes the brush holder to act on the inclined surface on the outside of the sliding plate. Under the action of the brush holder, the sliding plate moves away from the end of the brush holder. The sliding plate compresses the second spring, and the limiting rod on the back of the sliding plate can move along the through hole at the end of the connecting frame. After the protrusions on both sides of the brush holder are snapped into the limiting groove of the snap-fit ​​frame, the sliding plate is compressed by the second spring to stably fix the protrusions on the brush holder in the limiting groove.

[0012] Preferably, the limiting groove includes a first groove distributed longitudinally along the snap-fit ​​frame and a second groove extending from the bottom of the first groove toward the connecting frame, wherein the second groove is offset toward the side away from the bristles.

[0013] By adopting the above technical solution, the first groove in the limiting groove is used to guide the protrusion from above during brush holder installation. After reaching the bottom of the first groove, the protrusion is guided to the innermost end of the second groove by the action of the elastic limiting mechanism. Furthermore, the second groove is offset away from the side away from the brush bristles. When the carbon brush presses against the roller, the protrusion on the brush holder is subjected to a force towards the bottom of the second groove, making it difficult for the protrusion on the brush holder to slip out of the limiting groove, thus ensuring the stability of the carbon brush connection on the fixing frame.

[0014] Preferably, the bottom of the brush holder has an installation groove, in which the brush bristles are slidably installed by the installation plate. The installation plate is distributed along the length of the brush holder, and both ends of the installation plate are connected to the two side ends of the installation groove by a third spring.

[0015] Preferably, the contact surface between the bristles and the roller body is an arc-shaped surface adapted to the roller body surface.

[0016] By adopting the above technical solution, the mounting groove at the bottom of the brush holder is distributed along its length. The bristles slide in the mounting groove through the mounting plate at the top. The two ends of the mounting plate are connected to the two ends of the mounting groove through a third spring. When the arc-shaped surface at the bottom of the bristles contacts the roller body, the position of the bristles can be finely adjusted to ensure the static elimination effect of the static elimination device on the roller body.

[0017] Preferably, the top of the U-shaped bracket has evenly distributed limiting protrusions, wherein a first spring is fitted on the limiting protrusions, and a limiting plate is provided at the top free end of the first spring. The limiting plate can slide up and down in the longitudinal groove, and the outer diameter of the opening of the longitudinal groove is smaller than the outer diameter of the limiting plate.

[0018] Preferably, the two sides of the U-shaped bracket are connected to the bottom surface of the positioning body through buffer rods.

[0019] By adopting the above technical solution, the top of the U-shaped bracket is connected to the longitudinal groove of the positioning body via a first spring. The first spring ensures that the carbon brush at the bottom of the U-shaped mounting bracket is firmly pressed against the roller. Even during continuous wear of the carbon brush surface, the first spring maintains its stable contact with the roller. A limiting protrusion is provided at the top of the U-shaped bracket to accommodate the first spring, allowing for stable extension and contraction. The longitudinal groove mates with the limiting protrusion, allowing it to enter the longitudinal groove when the first spring is compressed. A limiting plate at the top of the first spring prevents its top from detaching from the longitudinal groove. Buffer rods on both sides of the U-shaped bracket ensure its stability during lifting and lowering.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. This application adds a carbon brush to the side support frame of the main roller winding the base film during the production of composite current collectors, thereby achieving the function of discharging residual static electricity and avoiding phenomena such as holes and pinholes caused by arcing due to static electricity accumulation.

[0022] 2. The carbon brush in this application can be detachably installed on the fixing frame. The fixing frame is engaged with the protrusions on both sides of one end of the brush holder through the limiting grooves on both sides of the snap-fit ​​frame. The other end enters the groove on the inner side of the connecting frame as the protrusion enters the limiting groove, thereby fixing the carbon brush into the fixing frame. When the bristles on the carbon brush are worn to the root, they can be quickly replaced. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a static electricity elimination device for a roller used in vacuum coating.

[0024] Figure 2 This is a schematic diagram of the bottom structure of a vacuum coating roller electrostatic elimination device;

[0025] Figure 3 This is an exploded view of an electrostatic elimination device for a roller used in vacuum coating.

[0026] Explanation of reference numerals in the attached drawings: 1. Carbon brush; 11. Brush holder; 111. Protrusion; 112. Mounting groove; 12. Brush bristles; 121. Mounting plate; 122. Third spring; 123. Arc-shaped surface; 2. Grounding terminal; 3. Fixing bracket; 31. First spring; 311. Limiting plate; 32. Snap-fit ​​frame; 321. Limiting groove; 3211. First groove; 3212. Second groove; 322. Slide groove; 33. Connecting frame; 331. Groove; 34. U-shaped bracket; 341. Limiting protrusion; 342. Buffer rod; 4. Positioning body; 41. Longitudinal groove; 5. Elastic limiting mechanism; 51. Sliding plate; 511. Limiting rod; 512. Limiting disc; 513. Slider; 52. Second spring. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0028] This application discloses an electrostatic elimination device for a roller used in vacuum coating.

[0029] Reference Figure 1 , Figure 2 and Figure 3A vacuum coating roller electrostatic elimination device includes a carbon brush 1 and a grounding terminal 2 fixed to the back of the carbon brush 1. The carbon brush 1 is detachably mounted on a fixing frame 3, including a brush holder 11 and brush bristles 12 at the bottom of the brush holder 11. The back of the fixing frame 3 is connected to a positioning body 4 via a first spring 31. The positioning body 4 is fixedly mounted on a support frame on the side of the roller, and at least two sets of longitudinal grooves 41 that can accommodate the first springs 31 are opened on one side of the fixing frame 3. The fixing frame 3 includes a snap-fit ​​frame 32 at one end and a connecting frame 33 at the other end. The backs of the two are connected by a U-shaped bracket 34. The first springs 31 are evenly distributed on the back of the U-shaped bracket 34. The snap-fit ​​frame 32 has limiting grooves 321 on both sides for snapping the brush holder 11. The brush holder 11 has protrusions 111 on both sides of one end for snapping with the limiting grooves 321. The connecting frame 33 has a groove 331 on the side facing the snap-fit ​​frame 32 that is adapted to the end of the brush holder 11. The carbon brush 1 in the static elimination device acts on the edge of the roller used to transfer the base film during the production process of the composite current collector, and conducts static electricity to the ground through the grounding terminal 2 connected to the wire. The carbon brush 1 acts on the roller at the connection between the roller edge and the support frame by the bristles 12 installed at the bottom of the brush holder 11. The carbon brush 1 is detachably installed on the fixing frame 3. The fixing frame 3 is engaged with the protrusions 111 on both sides of one end of the brush holder 11 by the limiting grooves 321 on both sides of the snap-fit ​​frame 32. The other end enters the groove 331 in the connecting frame 33 as the protrusions 111 enter the limiting grooves 321, thereby fixing the carbon brush 1 into the fixing frame 3. When the bristles 12 on the carbon brush 1 wear down to the root, they can be quickly replaced. The top of the snap-fit ​​frame 32 and the connecting frame 33 at both ends of the fixed frame 3 are connected by a U-shaped frame. The space at the bottom of the U-shaped frame facilitates the replacement of the spring brush. The top of the U-shaped frame is connected to the positioning body 4 by the first spring 31. Under the action of the first spring 31, the U-shaped frame can apply pressure to the surface of the roller, thereby ensuring the stable discharge of static electricity, avoiding the phenomenon of arcing caused by static electricity accumulation, and effectively preventing the phenomenon of holes and pinholes caused by static electricity arcing.

[0030] Reference Figure 1 , Figure 2 and Figure 3The snap-fit ​​frame 32 is also equipped with an elastic limiting mechanism 5 for locking the brush holder 11 in the limiting groove 321. This mechanism includes a sliding plate 51 slidably installed within the snap-fit ​​frame 32. The back of the sliding plate 51 is connected to the end of the snap-fit ​​frame 32 via a second spring 52. A limiting rod 511, penetrating the end of the connecting frame 33, is installed on the back of the sliding plate 51. The limiting rod 511 is located at the center of the second spring 52, and a limiting disc 512 is also installed at the outer end of the connecting frame 33. The outer surface of the sliding plate 51 is inclined upwards, and the two sides of the sliding plate 51 move within the sliding grooves 322 on both sides of the snap-fit ​​frame 32 via sliders 513. When the brush holder 11 is installed, the elastic limiting mechanism 5 installed in the snap-fit ​​frame 32 acts on the inclined surface of the outer side of the sliding plate 51. Under the action of the brush holder 11, the sliding plate 51 moves away from the end of the brush holder 11. The sliding plate 51 compresses the second spring 52. The limiting rod 511 on the back of the sliding plate 51 can move along the through hole at the end of the connecting frame 33. After the protrusions 111 on both sides of the brush holder 11 are inserted into the limiting groove 321 of the snap-fit ​​frame 32, the sliding plate 51 is compressed by the second spring 52 to stably fix the protrusions 111 on the brush holder 11 in the limiting groove 321.

[0031] Reference Figure 1 , Figure 2 and Figure 3 The limiting groove 321 includes a first groove 3211 longitudinally distributed along the snap-fit ​​frame 32 and a second groove 3212 extending from the bottom of the first groove 3211 toward the connecting frame 33, wherein the second groove 3212 is offset toward the side away from the bristles 12. The first groove 3211 in the limiting groove 321 is used to guide the protrusion 111 into the limiting groove 321 from above during brush holder 11 installation. After reaching the bottom of the first groove 3211, the protrusion 111 is guided to the innermost end of the second groove 3212 by the elastic limiting mechanism 5. Furthermore, the second groove 3212 is offset toward the side away from the bristles 12. When the carbon brush 1 presses against the roller, the protrusion 111 on the brush holder 11 is subjected to a force toward the bottom of the second groove 3212, making it difficult for the protrusion 111 on the brush holder 11 to slip out of the limiting groove 321, thus ensuring the stability of the carbon brush 1 connected to the fixing frame 3.

[0032] Reference Figure 1 , Figure 2 and Figure 3The brush holder 11 has a mounting groove 112 at its bottom, where the brush bristles 12 are slidably mounted on mounting plates 121. The mounting plates 121 are distributed along the length of the brush holder 11, and both ends of the mounting plates 121 are connected to the two side surfaces of the mounting groove 112 via third springs 122. The contact surface between the brush bristles 12 and the roller body is an arc-shaped surface 123 adapted to the roller body surface. The mounting groove 112 at the bottom of the brush holder 11 is distributed along its length, and the brush bristles 12 slide within the mounting groove 112 via the top mounting plates 121. The two ends of the mounting plates 121 are connected to the two ends of the mounting groove 112 via third springs 122. When the arc-shaped surface 123 at the bottom of the brush bristles 12 contacts the roller body, the position of the brush bristles 12 can be finely adjusted to ensure the static elimination effect of the static elimination device on the roller body.

[0033] Reference Figure 1 , Figure 2 and Figure 3 The top of the U-shaped bracket 34 has evenly distributed limiting protrusions 341, on which a first spring 31 is fitted. The free end of the top of the first spring 31 is provided with a limiting plate 311, which can slide up and down in the longitudinal groove 41. The outer diameter of the opening of the longitudinal groove 41 is smaller than the outer diameter of the limiting plate 311. The two sides of the U-shaped bracket 34 are connected to the bottom surface of the positioning body 4 through buffer rods 342. The top of the U-shaped bracket 34 is connected to the longitudinal groove 41 of the positioning body 4 through the first spring 31. The carbon brush 1 at the bottom of the U-shaped bracket can be pressed against the roller by the action of the first spring 31. During the continuous wear of the carbon brush 1, the carbon brush 1 can also be stably pressed against the roller by the action of the first spring 31. Furthermore, a limiting protrusion 341 is provided at the top of the U-shaped bracket 34 to accommodate the first spring 31, allowing the first spring 31 to extend and retract stably. The longitudinal groove 41 can be adapted to the limiting protrusion 341, so that the limiting protrusion 341 can enter the longitudinal groove 41 when the first spring 31 is compressed. The limiting plate 311 at the top of the first spring 31 can prevent the top of the first spring 31 from coming out of the longitudinal groove 41. The buffer rods 342 on both sides of the U-shaped bracket 34 are used to ensure the stability of the U-shaped bracket 34 during the lifting and lowering process.

[0034] Working principle: When installing carbon brush 1, the first grooves 3211 on both sides of the snap-fit ​​frame 32 of the fixing frame 3 snap into the protrusions 111 on both sides of one end of the brush holder 11. The brush holder 11 acts on the inclined surface on the outside of the sliding plate 51, moving the sliding plate 51 away from the end of the brush holder 11. The sliding plate 51 compresses the second spring 52. The limiting rod 511 on the back of the sliding plate 51 moves along the through hole at the end of the connecting frame 33. After the protrusions 111 on both sides of the brush holder 11 snap into the bottom of the first groove 3211 of the snap-fit ​​frame 32, the sliding plate 51 is compressed by the second spring 52, pushing the protrusions 111 on the brush holder 11 to the bottom of the second groove 3212. At the same time, the other end of the brush holder 11 enters the groove 331 on the inner side of the connecting frame 33 during the process of the protrusions 111 entering the second groove 3212, thereby fixing the carbon brush 1 into the fixing frame 3. The top of the snap-fit ​​frame 32 and the connecting frame 33 at both ends of the fixed frame 3 are connected by a U-shaped frame. The top of the U-shaped frame is connected to the positioning body 4 by a first spring 31. Under the action of the first spring 31, the U-shaped frame can apply pressure to the surface of the roller. The brush bristles 12 located at the bottom of the brush holder 11 are slidably installed in the mounting groove 112 through the mounting plate 121 on its top. The third springs 122 on both sides of the mounting plate 121 can adjust the position of the arc surface 123 of the brush bristles 12 so that it fits against the surface of the roller and stably discharges static electricity.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A static eliminator for a roller used in vacuum coating, comprising a carbon brush (1) and a grounding terminal (2) fixed to the back of the carbon brush (1), characterized in that: The carbon brush (1) is detachably mounted on the fixed frame (3), including a brush holder (11) and brush bristles (12) at the bottom of the brush holder (11). The back of the fixed frame (3) is connected to the positioning body (4) by a first spring (31). The positioning body (4) is fixedly mounted on the support frame at the edge of the roller body, and at least two sets of longitudinal grooves (41) that can accommodate the first spring (31) are opened on one side near the fixed frame (3). The fixed frame (3) includes a snap-fit ​​frame (32) at one end and a snap-fit ​​frame (32) at the other end. The connecting frame (33) and the back of the two are connected by a U-shaped bracket (34). The first spring (31) is evenly distributed on the back of the U-shaped bracket (34). The two sides of the snap-fit ​​frame (32) are provided with limiting grooves (321) for snapping the brush holder (11). The two sides of one end of the brush holder (11) are provided with protrusions (111) that snap into the limiting grooves (321). The connecting frame (33) facing the snap-fit ​​frame (32) is provided with a groove (331) that matches the end of the brush holder (11).

2. The electrostatic elimination device for a vacuum coating roller according to claim 1, characterized in that: The snap-fit ​​frame (32) is also equipped with an elastic limiting mechanism (5) for locking the brush holder (11) in the limiting groove (321). The mechanism includes a sliding plate (51) slidably installed in the snap-fit ​​frame (32). The back of the sliding plate (51) is connected to the end of the snap-fit ​​frame (32) via a second spring (52). A limiting rod (511) penetrating the end of the connecting frame (33) is installed on the back of the sliding plate (51). The limiting rod (511) is located at the center of the second spring (52). A limiting plate (512) is also installed at the outer end of the limiting rod (511) outside the connecting frame (33).

3. The electrostatic elimination device for a roller body used in vacuum coating according to claim 2, characterized in that: The outer side of the sliding plate (51) is inclined upward, and the two sides of the sliding plate (51) move in the grooves (322) on both sides of the snap-fit ​​frame (32) by the slider (513).

4. The electrostatic elimination device for a vacuum coating roller according to claim 1, characterized in that: The limiting groove (321) includes a first groove (3211) distributed longitudinally along the snap-fit ​​frame (32) and a second groove (3212) extending from the bottom of the first groove (3211) toward the connecting frame (33), wherein the second groove (3212) is offset toward the side away from the bristles (12).

5. The electrostatic elimination device for a roller body used in vacuum coating according to claim 1, characterized in that: The brush holder (11) has an installation groove (112) at the bottom, wherein the brush bristles (12) are slidably installed in the installation groove (112) via the installation plate (121), wherein the installation plate (121) is distributed along the length of the brush holder (11), and the two ends of the installation plate (121) are connected to the two ends of the installation groove (112) via a third spring (122).

6. The electrostatic elimination device for a roller body used in vacuum coating according to claim 5, characterized in that: The contact surface between the bristles (12) and the roller body adopts an arc-shaped surface (123) adapted to the roller body surface.

7. The electrostatic elimination device for a roller body used in vacuum coating according to claim 1, characterized in that: The top of the U-shaped bracket (34) is evenly distributed with limiting protrusions (341), wherein a first spring (31) is fitted on the limiting protrusion (341), and a limiting plate (311) is provided at the free end of the top of the first spring (31). The limiting plate (311) can slide up and down in the longitudinal groove (41), and the outer diameter of the opening of the longitudinal groove (41) is smaller than the outer diameter of the limiting plate (311).

8. The electrostatic elimination device for a roller body in vacuum coating according to claim 7, characterized in that: The U-shaped bracket (34) is connected to the bottom surface of the positioning body (4) on both sides by buffer rods (342).

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