An extended gravure roller electroplating device

Abstract

The extended gravure roller electroplating device provided by the present invention comprises a conductive rod, two retaining rings, a conductive head, an extended head and an insulating sealing sleeve. By locating the first retaining ring between the second retaining ring and the conductive head, the first and second retaining rings are connected to the conductive rod through left-handed and right-handed threads respectively, and the cylindrical part of the conductive head is connected to the conductive rod through a core filler whose internal and external threads are both right-handed threads, so that the conductive head and the retaining ring can be tightened on the conductive rod respectively; the extended head is locked on the conductive head by threading a plurality of first screws arranged on the extended head with the first retaining ring, and the first retaining ring is locked on the second retaining ring by threading a plurality of second screws arranged on the first retaining ring with the second retaining ring, so that the conductive rod and the head are well locked, relative rotation of the conductive rod and the head can be avoided, and changes in the length of the gravure roller can be easily adapted. The conductive rod of the device has a high utilization rate, and the current and torque transmission paths are separated, so that the safety is good.

Description

Technical Field

[0001] The invention relates to the technical field of gravure printing, and in particular to an extended gravure roller electroplating device. Background Art

[0002] The processing of the existing gravure rollers involves the processes of surface nickel plating, surface copper plating and surface chromium plating. Chinese invention patent CN208279711U discloses a plating device for a hollow gravure roller. However, in actual use, the current is transmitted through the contact surface between the conductive rod and the conductive head. When the conductive rod drives the conductive head to rotate, the friction force generated by the contact surface is also used to transmit the torque, which makes the overall utilization rate of the conductive rod low. In addition, there is a mutual slip phenomenon between the conductive rod and the conductive head, which makes the contact surface between the conductive rod and the conductive head easy to wear and generate a gap, which affects the current transmission effect and the torque transmission effect; Chinese invention patents CN210529094U, CN21052909 3U, CN210314539U, and CN210314538U all disclose an extended gravure roller electroplating device in which a key connection is used between the conductive rod and the conductive head to transmit the rotational torque. However, these four schemes have many components and complex structures, which makes the resistance of the current transmission path large and the energy consumption high. In addition, since the torque required for the rotation of the gravure roller is large, the key needs to have very high strength, resulting in a small range of material selection for the key and high cost. After long-term use, the key and the keyway are prone to wear and gaps. When starting and stopping, a large impact will occur, which will also affect the current transmission effect. Moreover, in the above method, when the length of the gravure roller changes, the entire conductive head needs to be replaced, which is inconvenient to operate and costly.

[0003] There is an urgent need for an extended gravure roller electroplating device with a high conductive rod utilization rate, separate current transmission path and torque transmission path, good locking degree of the conductive rod and the conductive head, which can prevent the conductive rod and the conductive head from rotating relative to each other and can easily adapt to changes in the length of the gravure roller. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide an extended gravure roller electroplating device which has a high conductive rod utilization rate, separate current transmission path and torque transmission path, good locking degree of the conductive rod and the conductive head, can avoid relative rotation of the conductive rod and the conductive head and can easily adapt to changes in the length of the gravure roller.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is that the extended gravure roller electroplating device comprises:

[0006] A conductive rod, wherein the conductive rod is a hollow copper rod;

[0007] A stop ring, the stop ring is threadedly connected to the right end of the conductive rod, the stop ring comprises a first stop ring and a second stop ring, and the first stop ring is located on the right side of the second stop ring;

[0008] A conductive head, the conductive head comprising a cylindrical portion and a disc portion, the disc portion being located on the right side of the cylindrical portion and being integrally formed with the cylindrical portion, the cylindrical portion being inserted into the right end portion of the conductive rod and being threadedly connected to the conductive rod, and the disc portion being located on the right side of the first retaining ring;

[0009] An extension head, the extension head is located on the right side of the disc portion, and a connecting head is provided on the right end surface of the extension head;

[0010] An insulating sealing sleeve, the insulating sealing sleeve comprising a first insulating sealing sleeve sleeved on the conductive rod, the retaining ring, and the outer wall of the disc portion, and a second insulating sealing sleeve sleeved on the outer wall of the extension head;

[0011] The first retaining ring is connected to the conductive rod via a left-handed thread, the second retaining ring is connected to the conductive rod via a right-handed thread, the cylindrical portion is connected to the conductive rod via a bushing, and both the internal and external threads of the bushing are right-handed threads;

[0012] The axial center lines of the conductive rod, the retaining ring, the conductive head, the extension head, the bushing, and the connector coincide with each other;

[0013] The extension head is provided with a plurality of first screws penetrating the disc portion, the first screws are evenly distributed in a ring along the axis of the extension head, and the first screws are threadedly connected with the first threaded holes on the first retaining ring to lock the extension head on the conductive head;

[0014] The first retaining ring is provided with a plurality of second screws, the second screws are located outside the first threaded hole and are evenly distributed in an annular shape along the axis of the first retaining ring, and the second screws are threadedly connected with the second threaded hole on the second retaining ring to lock the first retaining ring on the second retaining ring;

[0015] A third screw is provided at the center of the connecting head, and the third screw is threadedly connected to the third threaded hole in the middle of the extension head to lock the connecting head on the extension head. A through hole for installing a fourth screw is provided at the center of the third screw, and the fourth screw passes through the third screw and the extension head and is threadedly connected to the central threaded hole on the right end face of the conductive head to lock the third screw on the conductive head.

[0016] Preferably, a first outer retaining ring is arranged between the first retaining ring, the second retaining ring and the first insulating sealing sleeve, and the left and right end faces of the first outer retaining ring are pressed against the right end faces of the first retaining ring, the first insulating sealing sleeve and the second retaining ring to prevent the three from sliding against each other in the axial direction, and the first outer retaining ring is composed of three main parts with the same structure.

[0017] Preferably, a first groove is provided on the outer wall of the extension head, and a second groove corresponding to the first groove is provided on the inner wall of the second insulating sealing sleeve. The space enclosed by the first groove and the second groove is used to accommodate the second outer retaining ring. A fifth screw is provided on the right end face of the extension head. The fifth screw is screwed into the right end face of the extension head and passes through the first groove. The fifth screw presses the second outer retaining ring outward so that the second outer retaining ring is stuck in the first groove and the second groove at the same time to prevent the second insulating sealing sleeve from sliding left and right on the extension head. The second outer retaining ring is composed of multiple sections of the main body with the same structure.

[0018] Further preferably, an arc groove is provided on the inner wall of the second outer retaining ring, and the arc groove matches the screw rod of the fifth screw.

[0019] Preferably, an inner retaining ring is also provided on the outer wall of the right end portion of the conductive rod, and the inner retaining ring is located between the first stopping ring and the second stopping ring. The left and right end faces of the inner retaining ring are pressed against the first stopping ring, the conductive rod and the right end faces of the second stopping ring to prevent relative sliding of the three in the axial direction. The inner retaining ring is composed of two main parts with the same structure.

[0020] Preferably, both the first threaded hole and the second threaded hole are through holes.

[0021] Preferably, a plug for isolating an internal cavity of the conductive rod is provided in the conductive rod, the plug is located on the left side of the cylindrical portion, and the plug is tightly matched with the inner wall of the conductive rod.

[0022] Preferably, the outer surface of the conductive rod is provided with a third insulating sealing sleeve extending axially along the conductive rod, the third insulating sealing sleeve is located on the left side of the second stopping ring, the right end of the third insulating sealing sleeve is inserted between the first insulating sealing sleeve and the conductive rod, and an O-ring is provided between the third insulating sealing sleeve and the first insulating sealing sleeve.

[0023] Preferably, a positioning sleeve is provided between the extension head and the disc portion, and the positioning sleeve is embedded in the countersunk holes located on the left end surface of the extension head and the right end surface of the disc portion.

[0024] Further preferably, a first sealing ring is provided between the right end face of the first insulating sealing sleeve, the right end face of the conductive head and the left end face of the second insulating sealing sleeve, and the first sealing ring is used to prevent the plating liquid from contacting the conductive head; a second sealing ring is provided between the right end face of the extension head and the right end face of the second insulating sealing sleeve, and the second sealing ring is pressed against the gravure roller to prevent the plating liquid from contacting the extension head.

[0025] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0026] The invention provides an extended gravure roller electroplating device, comprising: a conductive rod, two retaining rings, a conductive head, an extended head and an insulating sealing sleeve. By arranging a first retaining ring between a second retaining ring and a disc portion of the conductive head, the first and second retaining rings are connected to the conductive rod through left-handed and right-handed threads respectively, and the cylindrical portion of the conductive head is connected to the conductive rod through a bushing whose internal and external threads are both right-handed threads, so that the conductive head and the retaining ring can be tightened onto the conductive rod respectively; by arranging a plurality of first screws penetrating the disc portion on the extended head and arranging a plurality of second screws on the first retaining ring, the extended head can be locked onto the conductive head through the threaded connection between the first screw and the first retaining ring, and the first retaining ring can be locked onto the second retaining ring through the threaded connection between the second screw and the second retaining ring, so that the conductive rod and the conductive head are locked well, and relative rotation of the conductive rod and the conductive head can be avoided; by arranging the extended head, the length change of the gravure roller can be easily adapted, the utilization rate of the conductive rod of the device is high, the current transmission path and the torque transmission path are separated, and the safety is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional schematic diagram of a preferred embodiment of the present invention.

[0028] Figure 2 yes Figure 1 Schematic diagram of the conductive rod.

[0029] Figure 3 yes Figure 1 Schematic diagram of the right side view of the conductive head.

[0030] Figure 4 yes Figure 1 Schematic diagram of the left side of the medium extension head.

[0031] Figure 5 yes Figure 1 Schematic diagram of the first insulating sealing sleeve.

[0032] Figure 6 yes Figure 1 Schematic diagram of the second insulating sealing sleeve.

[0033] Figure 7 yes Figure 1 Schematic diagram of the right side view of the first outer retaining ring.

[0034] Figure 8 yes Figure 1 Schematic diagram of the right side view of the second outer retaining ring.

[0035] Fig. 9 yes Figure 1 Schematic diagram of the right side view of the inner retaining ring.

[0036] Fig.10 yes Figure 1 Schematic diagram of the right side view of the first retaining ring in FIG.

[0037] Fig.11 yes Figure 1 Schematic diagram of the right side view of the second retaining ring.

[0038] Fig.12 yes Figure 1 Schematic diagram of the right side of the middle bushing.

[0039] Among them: 10. Conductive rod; 11. Plug; 21. First retaining ring; 211. First threaded hole; 212. Countersunk hole; 22. Second retaining ring; 221. Second threaded hole; 30. Conductive head; 31. Cylindrical part; 311. Bushing; 32. Disc part; 321. Center threaded hole; 33. Positioning sleeve countersunk hole; 40. Extension head; 41. Connector; 411. Copper tile; 412. Copper tile positioning column; 413. Third screw; 414. Through hole; 42. First groove; 43. Screw hole; 44. Positioning sleeve countersunk hole; 45. Third threaded hole; 51. First insulating sealing sleeve; 52. Second insulating sealing sleeve; 521. Second groove; 53. Third insulating sealing sleeve; 54. O-ring; 55. First sealing ring; 56. Second sealing ring; 61. First outer retaining ring; 62. Second outer retaining ring; 621. Arc groove; 63. Inner retaining ring; 70. Positioning sleeve; 80. Gravure roller. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0041] The left and right directions described in the present invention refer to Figure 1 The left and right direction in .

[0042] like Figure 1-12As shown, the extended gravure roller electroplating device provided by the present invention includes: a conductive rod 10, a stop ring, a conductive head 30, an extended head 40, and an insulating sealing sleeve, wherein the conductive rod 10 is a hollow copper rod; the stop ring is threadedly connected to the right end of the conductive rod 10, and the stop ring includes a first stop ring 21 and a second stop ring 22, and the first stop ring 21 is located on the right side of the second stop ring 22; the conductive head 30 includes a cylindrical portion 31 and a disc portion 32, and the disc portion 32 is located on the right side of the cylindrical portion 31 and is integrally formed with the cylindrical portion 31, and the cylindrical portion 31 is inserted into the right end of the conductive rod 10 and is threadedly connected to the conductive rod 10 The disc portion 32 is located on the right side of the first stop ring 21; the extended head 40 is located on the right side of the disc portion 32, and a connector 41 is provided on the right end surface of the extended head 40; the connector 41 is used to connect the gravure roller 80, and the connector 41 includes a copper shoe 411 for pressing against the gravure roller 80, and a copper shoe positioning column 412 located in the middle of the copper shoe 411, and a third screw 413 is provided at the center of the connector 41, and the third screw 413 is threadedly connected with the third threaded hole 45 in the middle of the extended head 40 to lock the connector 41 on the extended head 40, and a fourth screw (not shown in the figure) is provided at the center of the third screw 413. ), the fourth screw passes through the third screw 413 and the extension head 40 and is threadedly connected with the central threaded hole 321 on the right end face of the conductive head 30, and the third screw 413 is locked on the conductive head 30. The advantages of this arrangement are: 1. The third screw and the fourth screw are tightened with each other to prevent the screws from loosening, and 2. When disassembling the extension head, there is no need to loosen the third screw, so that the connector can be kept on the extension head without falling off, which is convenient for disassembly; the insulating sealing sleeve includes a first insulating sealing sleeve 51 sleeved on the conductive rod 10, the retaining ring, and the outer wall of the disc portion 32, and a sleeved on the outer wall of the extension head 40 The second insulating sealing sleeve 52 on the upper surface; in this embodiment, the first stop ring 21 is connected to the conductive rod 10 through a left-handed thread, the second stop ring 22 is connected to the conductive rod 10 through a right-handed thread, and the cylindrical portion 31 is threadedly connected to the conductive rod 10 through a bushing 311, and the bushing 311 is an inner and outer thread bushing, and the inner and outer threads of the bushing 311 are both right-handed threads. The advantages of this arrangement are: 1. The second stop ring, the first stop ring, and the conductive head are connected to the conductive rod through right-handed, left-handed, and right-handed threads in turn, and relative rotation is not easy to occur between the conductive head, the stop ring, and the conductive rod, and the locking effect is good, 2.The size of the cylindrical portion of the conductive head can be adjusted by the bushing, so that the waste conductive head can be reused. The axial lines of the conductive rod 10, the retaining ring, the conductive head 30, the extension head 40, the bushing 311, and the connecting head 41 coincide with each other. The extension head 40 is provided with a plurality of first screws (not shown in the figure) penetrating the disc portion 32. The first screws are evenly distributed in an annular manner along the axial line of the extension head 40. The first screws are threadedly connected with the first threaded holes 211 on the first retaining ring 21 to lock the extension head 40 on the conductive head 30. The first retaining ring 21 is provided with a plurality of second screws (not shown in the figure) As shown, the second screw is set in the countersunk hole 212 on the first retaining ring 21, the second screw is located outside the first threaded hole 211 and is evenly distributed along the axis of the first retaining ring 21, and the second screw is threadedly connected with the second threaded hole 221 on the second retaining ring 22 to lock the first retaining ring 21 on the second retaining ring 22. The advantage of this arrangement is that the extension head, the conductive head, the retaining ring, and the conductive rod can be tightened in the axial direction to prevent the conductive head and the conductive rod from moving relative to each other in the axial direction, so that the locking effect of the conductive head and the conductive rod is better. .

[0043] A first outer retaining ring 61 is arranged between the first retaining ring 21, the second retaining ring 22 and the first insulating sealing sleeve 51. The left and right end faces of the first outer retaining ring 61 are pressed against the right end faces of the first retaining ring 21, the first insulating sealing sleeve 51 and the second retaining ring 22 to prevent the three from sliding relative to each other in the axial direction. In this embodiment, for ease of installation, the first outer retaining ring 61 is composed of three main parts with the same structure.

[0044] A first groove 42 is provided on the outer wall of the extension head 40, and a second groove 521 corresponding to the first groove 42 is provided on the inner wall of the second insulating sealing sleeve 52. The space surrounded by the first groove 42 and the second groove 521 is used to accommodate the second outer retaining ring 62. A fifth screw (not shown in the figure) is provided on the right end face of the extension head 40. The fifth screw is located in the screw hole 43 on the right end face of the extension head 40. The fifth screw is screwed into the screw hole and axially penetrates the first groove 42, so that the fifth screw can press the second outer retaining ring 62 outwardly so that the second outer retaining ring 62 is stuck in the first groove 42 and the second groove 521 at the same time to prevent the second insulating sealing sleeve 52 from sliding left and right on the extension head 40. In this example, the second outer retaining ring 62 is composed of four main parts with the same structure. A circular arc groove 621 is provided on the inner wall of the second outer retaining ring 62. The circular arc groove 621 matches the screw rod of the fifth screw to play a positioning role.

[0045] An inner retaining ring 63 is also provided on the outer wall of the right end portion of the conductive rod 10. The inner retaining ring 63 is located between the first stop ring 21 and the second stop ring 22. The left and right end faces of the inner retaining ring 63 are pressed against the right end faces of the first stop ring 21, the conductive rod 10 and the second stop ring 22 to prevent relative sliding of the three in the axial direction. The inner retaining ring 63 is composed of two main parts with the same structure.

[0046] In this embodiment, the first threaded hole 211 and the second threaded hole 221 are both through holes, so that they can serve as locking holes during installation and as jackscrew holes during disassembly.

[0047] The conductive rod 10 is provided with a plug 11 for isolating the internal cavity thereof. The plug 11 is located on the left side of the cylindrical portion 31 and is tightly matched with the inner wall of the conductive rod 10. The tight match means that the outer diameter of the plug 11 is larger than the aperture of the inner hole of the conductive rod 10 by 0.005-0.015 mm.

[0048] In this embodiment, the outer surface of the conductive rod 10 is sleeved with a third insulating sealing sleeve 53 extending axially along the conductive rod 10. The third insulating sealing sleeve 53 is located on the left side of the second stop ring 22. The right end of the third insulating sealing sleeve 53 is inserted between the first insulating sealing sleeve 51 and the conductive rod 10. An O-ring 54 is arranged between the third insulating sealing sleeve 53 and the first insulating sealing sleeve 51. The O-ring 54 is used to prevent the electroplating solution from contacting the conductive rod 10.

[0049] In this embodiment, to facilitate the installation of the extension head 40, a positioning sleeve 70 is provided between the extension head 40 and the disc portion 32. The positioning sleeve 70 is embedded in the positioning sleeve countersunk holes 44 and 33 located on the left end surface of the extension head 40 and the right end surface of the disc portion 32. Before installing the extension head 40, the positioning sleeve 70 is first embedded in the positioning sleeve countersunk hole 33, and then the positioning sleeve countersunk hole 44 on the extension head 40 is aligned with the positioning sleeve 70, and the positioning sleeve 70 is put on the positioning sleeve 70. At this time, the extension head 40 can be well supported on the right end surface of the extension head 40, and then the first screw is passed through the positioning sleeve 70 and screwed into the first threaded hole 211 to complete the installation of the extension head 40.

[0050] In order to better seal and prevent the plating liquid from contacting the conductive head 30 and the extension head 40, a first sealing ring 55 is provided between the right end face of the first insulating sealing sleeve 51, the right end face of the conductive head 30 and the left end face of the second insulating sealing sleeve 52. The first sealing ring 55 is used to prevent the plating liquid from contacting the conductive head. A second sealing ring 56 is provided between the right end face of the extension head 40 and the right end face of the second insulating sealing sleeve 52. The second sealing ring 56 is pressed against the gravure roller 80 to prevent the plating liquid from contacting the extension head 40.

[0051] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0052] The extended gravure roller electroplating device provided by the present invention enables the first stop ring to be located between the second stop ring and the disc portion of the conductive head, enables the first and second stop rings to be connected to the conductive rod through left-hand and right-hand threads respectively, and enables the cylindrical portion of the conductive head to be connected to the conductive rod through a core filler whose internal and external threads are both right-hand threads, so that the conductive head and the stop ring can be tightened onto the conductive rod respectively; by arranging a plurality of first screws penetrating the disc portion on the extended head and arranging a plurality of second screws on the first stop ring, the extended head can be locked onto the conductive head through the threaded connection between the first screw and the first stop ring, and the first stop ring can be locked onto the second stop ring through the threaded connection between the second screw and the second stop ring, so that the conductive rod and the conductive head are well locked and relative rotation between the conductive rod and the conductive head can be avoided; by arranging the extended head, the length change of the gravure roller can be easily adapted, the utilization rate of the conductive rod of the device is high, the current transmission path and the torque transmission path are separated, and the safety is good.

[0053] It should be noted that, in the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0054] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An extended gravure roller electroplating device, comprising: A conductive rod, wherein the conductive rod is a hollow copper rod; A stop ring, the stop ring is threadedly connected to the right end of the conductive rod, the stop ring comprises a first stop ring and a second stop ring, and the first stop ring is located on the right side of the second stop ring; A conductive head, the conductive head comprising a cylindrical portion and a disc portion, the disc portion being located on the right side of the cylindrical portion and being integrally formed with the cylindrical portion, the cylindrical portion being inserted into the right end portion of the conductive rod and being threadedly connected to the conductive rod, and the disc portion being located on the right side of the first retaining ring; An extension head, the extension head is located on the right side of the disc portion, and a connector is provided on the right end surface of the extension head; an insulating sealing sleeve, the insulating sealing sleeve comprises a first insulating sealing sleeve sleeved on the conductive rod, the retaining ring, and the outer wall of the disc portion, and a second insulating sealing sleeve sleeved on the outer wall of the extension head; Features: The first retaining ring is connected to the conductive rod via a left-handed thread, the second retaining ring is connected to the conductive rod via a right-handed thread, the cylindrical portion is connected to the conductive rod via a bushing, and both the internal and external threads of the bushing are right-handed threads; The axial center lines of the conductive rod, the retaining ring, the conductive head, the extension head, the bushing, and the connector coincide with each other; The extension head is provided with a plurality of first screws penetrating the disc portion, the first screws are evenly distributed in a ring along the axis of the extension head, and the first screws are threadedly connected with the first threaded holes on the first retaining ring to lock the extension head on the conductive head; The first retaining ring is provided with a plurality of second screws, the second screws are located outside the first threaded hole and are evenly distributed in an annular shape along the axis of the first retaining ring, and the second screws are threadedly connected with the second threaded hole on the second retaining ring to lock the first retaining ring on the second retaining ring; A third screw is provided at the center of the connector, and the third screw is threadedly connected with the third threaded hole in the middle of the extension head to lock the connector on the extension head. A through hole for installing a fourth screw is provided at the center of the third screw, and the fourth screw passes through the third screw and the extension head and is threadedly connected with the central threaded hole on the right end surface of the conductive head to lock the third screw on the conductive head; The first threaded hole and the second threaded hole are both through holes; A plug for isolating the internal cavity of the conductive rod is arranged inside the conductive rod, the plug is located on the left side of the cylindrical portion, and the plug is tightly matched with the inner wall of the conductive rod.

2. The extended gravure roller electroplating device according to claim 1, characterized in that: A first outer retaining ring is arranged between the first retaining ring, the second retaining ring and the first insulating sealing sleeve. The left and right end faces of the first outer retaining ring are pressed against the right end faces of the first retaining ring, the first insulating sealing sleeve and the second retaining ring to prevent the three from sliding against each other in the axial direction. The first outer retaining ring is composed of three main parts with the same structure.

3. The extended gravure roller electroplating device according to claim 1, characterized in that: A first groove is provided on the outer wall of the extension head, and a second groove corresponding to the first groove is provided on the inner wall of the second insulating sealing sleeve. The space surrounded by the first groove and the second groove is used to accommodate the second outer retaining ring. A fifth screw is provided on the right end face of the extension head. The fifth screw is screwed into the right end face of the extension head and passes through the first groove. The fifth screw presses the second outer retaining ring outward so that the second outer retaining ring is stuck in the first groove and the second groove at the same time to prevent the second insulating sealing sleeve from sliding left and right on the extension head. The second outer retaining ring is composed of multiple sections of the main body with the same structure.

4. The extended gravure roller electroplating device according to claim 3, characterized in that: An arc groove is arranged on the inner wall of the second outer retaining ring, and the arc groove matches the screw rod of the fifth screw.

5. The extended gravure roller electroplating device according to claim 1, characterized in that: An inner retaining ring is also provided on the outer wall of the right end portion of the conductive rod, and the inner retaining ring is located between the first stopping ring and the second stopping ring. The left and right end faces of the inner retaining ring are pressed against the first stopping ring, the conductive rod and the right end faces of the second stopping ring to prevent relative sliding of the three in the axial direction. The inner retaining ring is composed of two main parts with the same structure.

6. The extended gravure roller electroplating device according to claim 1, characterized in that: The outer surface of the conductive rod is sleeved with a third insulating sealing sleeve extending axially along the conductive rod, the third insulating sealing sleeve is located on the left side of the second stopping ring, the right end of the third insulating sealing sleeve is inserted between the first insulating sealing sleeve and the conductive rod, and an O-ring is arranged between the third insulating sealing sleeve and the first insulating sealing sleeve.

7. The extended gravure roller electroplating device according to claim 1, characterized in that: A positioning sleeve is arranged between the extension head and the disc portion, and the positioning sleeve is embedded in the countersunk holes located on the left end surface of the extension head and the right end surface of the disc portion.

8. The extended gravure roller electroplating device according to any one of claims 1 to 7, characterized in that: A first sealing ring is provided between the right end face of the first insulating sealing sleeve, the right end face of the conductive head and the left end face of the second insulating sealing sleeve, and the first sealing ring is used to prevent the electroplating liquid from contacting the conductive head; a second sealing ring is provided between the right end face of the extension head and the right end face of the second insulating sealing sleeve, and the second sealing ring is pressed against the gravure roller to prevent the electroplating liquid from contacting the extension head.

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