A drum stand with a quick dismounting drum core structure

Abstract

This invention discloses a drum frame with a quick-release drum core structure, comprising a drum frame structure, a drum core structure, a cleaning structure, and a quick-release structure. The cleaning structure is fixed at both ends to the drum core structure. Several drum core structures are arranged side-by-side and detachably fixed within the drum frame structure via the quick-release structure. The drum frame structure includes a front drum core seat and a rear drum core seat. Several drum core grooves are evenly distributed on the front drum core seat, and several drum core structures are detachably fixed within these grooves. This invention simplifies the drum core assembly and disassembly process, shortens the time required for drum core structure replacement and maintenance, and improves ease of use and maintenance. It also increases the connection surface between the waste toner compartment and the cleaning scraper, improving the reliability of the cleaning structure. Furthermore, the inclusion of a screw allows for effective waste toner drainage and discharge, thereby extending the overall service life of the drum frame.

Description

Technical Field

[0001] This invention relates to the field of printer technology, and more particularly to a drum frame with a quick-release drum core structure. Background Technology

[0002] In existing technologies, multi-color imaging devices such as color printers typically require multiple toner cartridges to correspond to different toner channels in order to achieve multi-color overlay imaging of cyan, magenta, yellow, and black. The mainstream design in the industry is to integrate multiple drum core structures on a single drum frame. Although this integrated design can meet the requirements of compact equipment assembly, the lack of a quick-release positioning structure means that the connection between the drum core and the drum frame is a fixed assembly. The disassembly and assembly process requires special disassembly tools and is cumbersome. This not only significantly increases the difficulty and time required for individual drum core replacement and routine fault diagnosis, but also leads to low efficiency in disassembly and reassembly when the entire drum frame is repaired, thus increasing equipment maintenance.

[0003] Meanwhile, due to limitations in the internal space layout and structural design of the drum frame, existing cleaning scrapers are generally rigidly connected to the fixed structure only through the two ends. The middle section of the scraper lacks any supporting or limiting structure. This makes the middle section prone to deformation due to uneven stress during continuous tangential scraping of waste powder from the drum core. This leads to a decrease in the precision of the line contact between the scraper and the drum core, resulting in problems such as blade reverse cutting, incomplete waste powder removal, and residual waste powder contamination on the drum core surface. In severe cases, long-term abnormal stress can even cause the cleaning scraper blade to chip or break. This affects the image clarity and stability of the equipment, shortens the lifespan of core consumables such as the drum core and scraper, and increases the frequency of consumable replacements and operating costs for users, making it difficult to meet the needs of efficient, stable, and low-cost equipment use and maintenance.

[0004] Therefore, it is necessary to improve existing technologies. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, one object of the present invention is to provide a drum frame with a quick-disassembly and assembly drum core structure, which simplifies the drum core disassembly and assembly process, shortens the time spent on drum core structure replacement and maintenance, and improves the convenience of use and maintenance.

[0006] The above objective is achieved through the following technical solution: A drum frame with a quick-release drum core structure includes a drum frame structure, a drum core structure, a cleaning structure, and a quick-release structure. The two ends of the cleaning structure are fixed to the drum core structure, and several drum core structures are arranged side by side and detachably fixed inside the drum frame structure through the quick-release structure. The drum frame structure includes a front drum core seat and a rear drum core seat. The front drum core seat has several drum core grooves evenly distributed at intervals, and several drum core structures are detachably fixed in the drum core grooves.

[0007] In some embodiments, the quick-release structure includes a swivel fastener and a fixing cover. The cleaning structure includes an integrally formed waste powder hopper, a front connection part of the waste powder hopper, and a rear connection part of the waste powder hopper. The front connection part of the waste powder hopper is provided with an adjustment groove adapted to the drum core groove. The drum core structure includes a steel shaft and a drum core. The steel shaft passes through the axis of the drum core. The rear end of the steel shaft passes through the rear connection part of the waste powder hopper and is limited to the rear drum core seat. The front end of the steel shaft passes through the swivel fastener and is detachably fixed in the fixing cover. The swivel fastener fixes the drum core groove and the adjustment groove on its outer peripheral wall.

[0008] In some embodiments, the drum core groove is U-shaped, including a drum core groove and two straight edges of grooves symmetrically arranged above the drum core groove. The swivel fastener includes a fastener body and a fastener connecting part. The fastener body and the fastener connecting part are integrally formed and have a drum core connecting hole on the coaxial center. The steel shaft is inserted into the drum core connecting hole. The fastener body is a ring structure with a diameter larger than the diameter of the drum core groove. A fastener rib is provided on the upper edge of the fastener body. The fastener rib is engaged on the outside of the drum core groove. A fastener groove is recessed at the lower end of the fastener body. The fastener connecting part is a ring structure with two beveled edges symmetrically formed on both sides of its outer circumference. The distance between the two beveled edges is less than the distance between the two straight edges of the grooves. An arc-shaped adjusting protrusion is provided on the side of the fastener connecting part away from the fastener groove. The distance between the adjusting protrusion and the fastener groove is equal to the thickness of the drum core groove.

[0009] In some embodiments, the adjusting groove includes an irregular groove and two straight edges of the irregular groove, the distance between the two straight edges of the irregular groove is equal to the distance between the straight edges of the two grooves, the right side of the irregular groove has a right arc that matches the upper edge of the fastener connection part, and the upper edge of the fastener connection part can rotate within the right arc, and the left side and lower part of the irregular groove are connected to form a 90° angle. O The left arc, the diameter of which is equal to the diameter of the adjusting protrusion, and the adjusting protrusion can rotate within the left arc.

[0010] In some embodiments, a flat platform is provided at one end of the steel shaft near the fixed cover, and a flat groove adapted to the flat platform is provided on the inner side of the fixed cover.

[0011] In some embodiments, the cleaning structure further includes a cleaning scraper. The waste powder bin is cylindrical and has an opening near the drum core. A scraper connecting edge is provided at the upper end of the waste powder bin opening. The two ends of the back of the cleaning scraper are fixedly connected to the two ends of the scraper connecting edge by screws. At least two back connecting holes are evenly distributed in the middle of the back of the cleaning scraper. The back connecting holes are connected to the middle of the scraper connecting edge by screws. The blade of the cleaning scraper is tangent to the drum core.

[0012] In some embodiments, a powder discharge pipe is provided at the rear end of the waste powder bin after passing through the waste powder bin. A screw is provided inside the powder discharge pipe, and the front end of the screw passes through the front end of the waste powder bin and is connected to a gear.

[0013] In some embodiments, the screw includes a screw body and blades, the screw body is cylindrical, and the blades are axially arranged on the outer periphery of the screw body.

[0014] In some embodiments, the blades are equidistant helical blades.

[0015] In some embodiments, a groove protrusion is provided in the groove, and the groove protrusion is connected to the flat platform, so that the flat platform and the groove are interference-fitted.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention proposes a drum frame with a quick-assembly and disassembly drum core structure. On the one hand, by optimizing the structural design, the drum core assembly and disassembly process is simplified, the time spent on drum core replacement and maintenance is shortened, and the convenience of drum frame use and maintenance is improved. On the other hand, by increasing the connection surface between the waste powder bin and the cleaning scraper, the working reliability of the cleaning structure is effectively improved. Furthermore, a screw is installed in the waste powder bin to achieve effective drainage and smooth discharge of waste powder, thereby significantly extending the overall service life of the drum frame. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the drum stand in the embodiment; Figure 2 yes Figure 1 A magnified view of part A in the middle; Figure 3 yes Figure 1 Exploded view of the structure of part A; Figure 4 yes Figure 3 A magnified view of part B in the middle section; Figure 5 This is a three-dimensional schematic diagram of the cleaning structure in the embodiment; Figure 6 This is an exploded view of the cleaning structure in the embodiment; Figure 7 This is a three-dimensional schematic diagram of the screw in the embodiment; Figure 8 This is a three-dimensional schematic diagram (1) of the rotating fastener in the embodiment; Figure 9 This is a three-dimensional schematic diagram (2) of the rotating fastener in the embodiment; Figure 10 This is a three-dimensional schematic diagram of the fixed cover inside the real-time interior.

[0018] In the diagram: 1. Drum frame structure; 11. Front drum core seat; 111. Drum core groove; 1111. Drum core slot; 1112. Straight edge of groove; 12. Rear drum core seat; 2. Drum core structure; 21. Steel shaft; 211. Flat platform; 22. Drum core; 3. Cleaning structure; 31. Waste toner hopper; 311. Waste toner hopper opening; 312. Scraper connecting edge; 313. Toner discharge pipe; 32. Waste toner hopper front connecting part; 321. Adjustment groove; 3211. Irregular groove; 3212. Straight edge of irregular groove; 3213, Right arc; 3214, Left arc; 33, Waste powder hopper rear connection; 34, Cleaning scraper; 341, Blade back connection hole; 4, Quick release structure; 41, Fixed cover; 411, Flat groove; 4111, Flat groove rib; 5, Rotary fastener; 51, Fastener body; 511, Fastener rib; 512, Fastener groove; 52, Fastener connection; 521, Beveling; 522, Adjusting protrusion; 53, Drum core connection hole; 6, Screw; 61, Screw body; 62, Blade. Detailed Implementation

[0019] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific embodiments of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solutions claimed in the present invention.

[0020] like Figure 1-10 As shown, this embodiment provides a drum frame with a quick-release drum core structure, including a drum frame structure 1, a drum core structure 2, a cleaning structure 3 and a quick-release structure 4. The two ends of the cleaning structure 3 are fixed on the drum core structure 2, and several drum core structures 2 are arranged side by side and detachably fixed in the drum frame structure 1 through the quick-release structure 4. The drum frame structure 1 includes a front drum core seat 11 and a rear drum core seat 12. The front drum core seat 11 has a plurality of drum core grooves 111 evenly distributed at intervals, and a plurality of the drum core structures 2 are detachably fixed in the drum core grooves 111.

[0021] The present invention proposes a drum frame with a quick-assembly and disassembly drum core structure. On the one hand, by optimizing the structural design, the drum core assembly and disassembly process is simplified, the time spent on drum core replacement and maintenance is shortened, and the convenience of drum frame use and maintenance is improved. On the other hand, by increasing the connection surface between the waste powder bin and the cleaning scraper, the working reliability of the cleaning structure is effectively improved. Furthermore, a screw is installed in the waste powder bin to achieve effective drainage and smooth discharge of waste powder, thereby significantly extending the overall service life of the drum frame.

[0022] Specifically, the quick-release structure 4 includes a rotating fastener 5 and a fixing cover 41. The cleaning structure 3 includes an integrally formed waste powder bin 31, a front connecting part 32 of the waste powder bin, and a rear connecting part 33 of the waste powder bin. The front connecting part 32 of the waste powder bin is provided with an adjustment groove 321 that is adapted to the drum core groove 111. The drum core structure 2 includes a steel shaft 21 and a drum core 22. The steel shaft 21 passes through the axis of the drum core 22. The rear end of the steel shaft 21 passes through the rear connecting part 33 of the waste powder bin and is limited to the rear drum core seat 12. The front end of the steel shaft 21 passes through the rotating fastener 5 and is detachably fixed in the fixing cover 41. The rotating fastener 5 fixes the drum core groove 111 and the adjustment groove 321 on its outer peripheral wall.

[0023] The quick-release structure 4 not only features a simple structure and uses minimal materials, effectively controlling production costs, but also allows for easy and rapid disassembly and assembly of the drum core structure 2, making operation convenient and efficient. The drum core structure 2 and the cleaning structure 3 are linked together as one unit. When the equipment needs maintenance, operators can easily remove both as a whole. Furthermore, using only the quick-release structure 4, the drum core structure 2 and the cleaning structure 3 can be simultaneously disassembled from the toner cartridge frame structure 1, further reducing production and maintenance costs while significantly improving overall disassembly and assembly efficiency and maintenance convenience, thus balancing economy and practicality.

[0024] Furthermore, the drum core groove 111 is U-shaped, comprising a drum core groove 1111 and two symmetrically arranged straight edges 1112 above the drum core groove 1111. The rotating fastener 5 includes a fastener body 51 and a fastener connecting part 52. The fastener body 51 and the fastener connecting part 52 are integrally formed and have a drum core connecting hole 53 on the coaxial axis. The steel shaft 21 is inserted into the drum core connecting hole 53. The fastener body 51 has a ring structure and its diameter is larger than the diameter of the drum core groove 1111. A fastener protrusion is provided on the upper edge of the fastener body 51. The fastener rib 511 is engaged on the outside of the drum core groove 111. A fastener groove 512 is recessed at the lower end of the fastener body 51. The fastener connecting part 52 is a circular ring structure with two symmetrical beveled edges 521 on both sides of its outer circumference. The distance between the two beveled edges 521 is less than the distance between the two straight edges 1112 of the groove. An arc-shaped adjusting protrusion 522 is provided on the side of the fastener connecting part 52 away from the fastener groove 512. The distance between the adjusting protrusion 522 and the fastener groove 512 is equal to the thickness of the drum core groove 111. The fastener body 51 has a circular ring structure with a diameter larger than the diameter of the drum core groove 1111, which facilitates the fastener body 51 abutting against the outer wall of the front drum core seat 11, forming a positioning barrier.

[0025] Preferably, the adjusting groove 321 includes an irregular groove 3211 and two irregular groove straight edges 3212. The distance between the two irregular groove straight edges 3212 is equal to the distance between the two groove straight edges 1112. The right side of the irregular groove 3211 has a right arc 3213 that matches the upper edge of the fastener connection part 52, and the upper edge of the fastener connection part 52 can rotate within the right arc 3213. The left side and lower part of the irregular groove 3211 are connected to form a 90° angle. O The left circular arc 3214 has a diameter equal to the diameter of the adjusting protrusion 522, and the adjusting protrusion 522 can rotate within the left circular arc 3214.

[0026] The drum core connecting hole 53 is provided with several steel shaft grooves, which achieve an interference fit between the steel shaft 21 and the drum core connecting hole 53, thereby forming an interference connection between the rotating fastener 5 and the steel shaft 21. At the same time, the fixing cover 41 is detachably fixed to the steel shaft 21, so when the operator rotates the fixing cover 41, the drum core 22 and the rotating fastener 5 can be moved simultaneously. It is worth mentioning that the fixing cover 41 can not only protect the steel shaft 21, but also make it easy for the operator to grip and apply force. When the steel shaft 21 is inserted into the rotating fastener 5, the front connecting part 32 of the waste powder bin and the front drum core seat 11 are in close contact with each other, and the top of the front connecting part 32 of the waste powder bin and the front drum core seat 11 are in contact with the outer peripheral wall of the rotating fastener 5. When the operator rotates the fixing cover 41 downwards by 90°, the adjusting protrusion 522 engages within the upper edge of the left arc 3214, locking and positioning the drum core structure 2. When the fixing cover 41 is rotated upwards by 90°, the adjusting protrusion 522 engages within the lower edge of the left arc 3214, allowing the two chamfered edges 521 to move upwards between the straight edges 1112 of the two grooves, thus removing the drum core structure 2 from the toner cartridge frame structure 1. Furthermore, the fastener protrusions 511 and fastener grooves 512 allow the operator to grip the two fastener protrusions 511 and the fastener grooves 512 when the fixing cover 41 is not installed, directly rotating the steel shaft 21. This provides double protection for the assembly and disassembly of the drum core structure 2 and enhances the flexibility of the assembly and disassembly operation.

[0027] Specifically, a flat platform 211 is provided at one end of the steel shaft 21 near the fixed cover 41, and a flat groove 411 adapted to the flat platform 211 is provided on the inner side of the fixed cover 41. The flat platform 211 and the flat groove 411 are provided to facilitate limiting the front end of the steel shaft 21 within the fixed cover 41 and to allow it to rotate as the fixed cover 41 rotates.

[0028] Furthermore, the cleaning structure 3 also includes a cleaning scraper 34. The waste powder container 31 is cylindrical and has a waste powder container opening 311 on the side near the drum core 22. A scraper connecting edge 312 is provided at the upper end of the waste powder container opening 311. The two ends of the back of the cleaning scraper 34 are fixedly connected to the two ends of the scraper connecting edge 312 by screws. At least two back connecting holes 341 are evenly distributed in the middle of the back of the cleaning scraper 34. The back connecting holes 341 are connected to the middle of the scraper connecting edge 312 by screws. The blade of the cleaning scraper 34 is tangent to the drum core 22.

[0029] The connection between the blade back connecting hole 341 and the middle of the scraper connecting edge 312 significantly improves the overall support rigidity and force uniformity of the cleaning scraper 34, effectively preventing problems such as central deformation, blade reversal, incomplete powder scraping, or breakage. This ensures continuous tangential contact between the cleaning scraper 34 and the drum core 22, resulting in stable and reliable cleaning performance and extended service life. It is worth noting that the connection between the blade back connecting hole 341 and the middle of the scraper connecting edge 312 can be achieved in various ways. The entire blade back of the cleaning scraper 34 can be connected to the scraper connecting edge 312 using special adhesive. In this embodiment, the connection is achieved through screws and the blade back connecting hole 341, which also facilitates the replacement of the cleaning scraper 34 during maintenance.

[0030] Furthermore, a powder discharge pipe 313 is provided at the rear end of the waste powder bin 31 after passing through the waste powder bin and connecting part 33. A screw 6 is provided inside the powder discharge pipe 313, and the front end of the screw 6 passes through the front end of the waste powder bin 31 and is connected to a gear.

[0031] The toner discharge pipe 313 is designed to remove accumulated waste toner from the waste toner bin 31, preventing waste toner buildup, clumping, or overflow, and ensuring stable operation of the toner cartridge. A screw 6 is installed inside the waste toner bin 31 to discharge waste toner, preventing accumulation, clumping, or blockage, ensuring stable discharge of waste toner, and guaranteeing normal operation of the toner cartridge.

[0032] Specifically, the screw 6 includes a screw body 61 and blades 62. The screw body 61 is cylindrical, and the blades 62 are axially arranged on the outer periphery of the screw body 61.

[0033] The blades 62 enhance the function of the screw 6 in guiding waste powder, ensuring stable conveying of waste powder along the axial direction of the screw body 61, and improving the smoothness and reliability of powder discharge.

[0034] Preferably, the blade 62 is an equidistant helical blade. The blade 62 can be configured in various shapes, and the direction of its inclined surface can be adjusted at multiple angles as needed. In this embodiment, an equidistant helical blade is preferred. The equidistant helical blade has a simple structure, is easy to process and manufacture, and can effectively reduce production difficulty and manufacturing costs. Furthermore, since the powder discharge pipe 313 is located behind the drum, the helical blade can stably push waste powder towards the discharge pipe 313. Because of its uniform pitch and balanced force, it can achieve uniform and stable conveying of waste powder, effectively avoiding local accumulation, jamming, or uneven conveying of waste powder, ensuring smooth powder discharge and reliable structural operation.

[0035] Furthermore, a flat groove protrusion 4111 is provided within the flat groove 411, and the flat groove protrusion 4111 is connected to the flat platform 211, so that the flat platform 211 and the flat groove 411 are interference-fitted. The interference-fitting connection between the flat platform 211 and the flat groove 411 ensures a tight fit between the drum core 22 and the fixed cover 41, resulting in a secure and loose assembly without the need for additional fastening parts. The structure is simple and the assembly is highly efficient.

[0036] The above descriptions are merely some embodiments of the present invention. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A drum frame with a quick-assembly and disassembly drum core structure, characterized in that, It includes a drum frame structure (1), a drum core structure (2), a cleaning structure (3) and a quick-release structure (4). The two ends of the cleaning structure (3) are fixed on the drum core structure (2). Several drum core structures (2) are arranged side by side and detachably fixed in the drum frame structure (1) through the quick-release structure (4). The drum frame structure (1) includes a front drum core seat (11) and a rear drum core seat (12). The front drum core seat (11) has a plurality of drum core grooves (111) evenly distributed at intervals. A plurality of the drum core structures (2) are detachably fixed in the drum core grooves (111).

2. A drum frame with a quick-release drum core structure according to claim 1, characterized in that: The quick-release structure (4) includes a rotating fastener (5) and a fixed cover (41). The cleaning structure (3) includes an integrally formed waste powder bin (31), a waste powder bin front connection part (32), and a waste powder bin rear connection part (33). The waste powder bin front connection part (32) is provided with an adjustment groove (321) that is adapted to the drum core groove (111). The drum core structure (2) includes a steel shaft (21) and a drum core (22). The steel shaft (21) passes through the axis of the drum core (22). The rear end of the steel shaft (21) passes through the waste powder bin rear connection part (33) and is limited to the rear drum core seat (12). The front end of the steel shaft (21) passes through the rotating fastener (5) and is detachably fixed in the fixed cover (41). The rotating fastener (5) fixes the drum core groove (111) and the adjustment groove (321) on its outer peripheral wall.

3. A drum frame with a quick-release drum core structure according to claim 2, characterized in that: The drum core groove (111) is U-shaped, including a drum core groove (1111) and two groove straight edges (1112) symmetrically arranged above the drum core groove (1111). The rotating fastener (5) includes a fastener body (51) and a fastener connecting part (52). The fastener body (51) and the fastener connecting part (52) are integrally formed and have a drum core connecting hole (53) on the coaxial center. The steel shaft (21) is inserted into the drum core connecting hole (53). The fastener body (51) is a ring structure and its diameter is larger than the diameter of the drum core groove (1111). A fastener rib (5) is provided on the upper edge of the fastener body (51). 11) The fastener rib (511) is engaged on the outside of the drum core groove (111). A fastener groove (512) is recessed at the lower end of the fastener body (51). The fastener connecting part (52) is a circular ring structure. Two beveled edges (521) are symmetrically formed on both sides of its outer circumference. The distance between the two beveled edges (521) is less than the distance between the two straight edges (1112) of the groove. An arc-shaped adjusting protrusion (522) is provided on the side of the fastener connecting part (52) away from the fastener groove (512). The distance between the adjusting protrusion (522) and the fastener groove (512) is equal to the thickness of the drum core groove (111).

4. A drum frame with a quick-release drum core structure according to claim 3, characterized in that: The adjusting groove (321) includes an irregular groove (3211) and two irregular groove straight edges (3212). The distance between the two irregular groove straight edges (3212) is equal to the distance between the two groove straight edges (1112). The right side of the irregular groove (3211) has a right arc (3213) that matches the upper edge of the fastener connection part (52), and the upper edge of the fastener connection part (52) can rotate within the right arc (3213). The left side and the bottom of the irregular groove (3211) are connected to form a 90° angle. O The left arc (3214) has a diameter equal to that of the adjusting protrusion (522) and the adjusting protrusion (522) can rotate within the left arc (3214).

5. A drum frame with a quick-release drum core structure according to claim 3, characterized in that: The steel shaft (21) has a flat platform (211) at one end near the fixed cover (41), and the fixed cover (41) has a flat groove (411) that is adapted to the flat platform (211) on the inner side.

6. A drum frame with a quick-release drum core structure according to any one of claims 1-5, characterized in that: The cleaning structure (3) also includes a cleaning scraper (34). The waste powder bin (31) is cylindrical and has a waste powder bin opening (311) on the side near the drum core (22). A scraper connecting edge (312) is provided at the upper end of the waste powder bin opening (311). The two ends of the back of the cleaning scraper (34) are fixedly connected to the two ends of the scraper connecting edge (312) by screws. There are not less than two back connecting holes (341) evenly distributed in the middle of the back of the cleaning scraper (34). The back connecting holes (341) are connected to the middle of the scraper connecting edge (312) by screws. The blade of the cleaning scraper (34) is tangent to the drum core (22).

7. A drum frame with a quick-release drum core structure according to any one of claims 1-5, characterized in that: The rear end of the waste powder bin (31) is connected to the waste powder bin connection part (33) by a powder discharge pipe (313). A screw (6) is installed inside the powder discharge pipe (313). The front end of the screw (6) passes through the front end of the waste powder bin (31) and is connected to a gear.

8. A drum frame with a quick-release drum core structure according to claim 7, characterized in that: The screw (6) includes a screw body (61) and blades (62). The screw body (61) is cylindrical, and the blades (62) are axially arranged on the outer periphery of the screw body (61).

9. A drum frame with a quick-release drum core structure according to claim 8, characterized in that: The blade (62) is an equidistant helical blade.

10. A drum frame with a quick-release drum core structure according to claim 5, characterized in that: The flat groove (411) is provided with a flat groove protrusion (4111), which is connected to the flat platform (211) so that the flat platform (211) and the flat groove (411) are interference-fitted.

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